update manpage

ignore filesystems which return zeros for statfs. closes #335

.gitignore

@@ -11,3 +11,15 @@
 *.lai
 *.la
 *.a
+
+# build artifacts
+mergerfs
+obj/
+src/version.hpp
+
+# Debian files
+debian/files
+debian/changelog
+
+# RPM files
+rpmbuild/

LICENSE

@@ -1,23 +1,17 @@
 /*
-   The MIT License (MIT)
+  ISC License
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

Makefile

@@ -1,40 +1,39 @@
-# The MIT License (MIT)
+#  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 #
-# Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+#  Permission to use, copy, modify, and/or distribute this software for any
+#  purpose with or without fee is hereby granted, provided that the above
+#  copyright notice and this permission notice appear in all copies.
 #
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
+#  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+#  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+#  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+#  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+#  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+#  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
 
 PKGCONFIG =  	$(shell which pkg-config)
-GIT 	= 	$(shell which git)
-TAR 	= 	$(shell which tar)
-MKDIR   = 	$(shell which mkdir)
-TOUCH 	= 	$(shell which touch)
-CP      = 	$(shell which cp)
-RM 	= 	$(shell which rm)
-FIND 	= 	$(shell which find)
-INSTALL = 	$(shell which install)
-MKTEMP  = 	$(shell which mktemp)
-STRIP   = 	$(shell which strip)
-PANDOC  =       $(shell which pandoc)
+GIT 	  = 	$(shell which git)
+TAR 	  = 	$(shell which tar)
+MKDIR     = 	$(shell which mkdir)
+TOUCH 	  = 	$(shell which touch)
+CP        = 	$(shell which cp)
+RM 	  = 	$(shell which rm)
+LN        =     $(shell which ln)
+FIND 	  = 	$(shell which find)
+INSTALL   = 	$(shell which install)
+MKTEMP    = 	$(shell which mktemp)
+STRIP     = 	$(shell which strip)
+PANDOC    =	$(shell which pandoc)
+SED       =     $(shell which sed)
+GZIP      =     $(shell which gzip)
+RPMBUILD  =     $(shell which rpmbuild)
+GIT2DEBCL =     ./tools/git2debcl
+CPPFIND   =     ./tools/cppfind
 
 ifeq ($(PKGCONFIG),"")
-$(error "pkg-config not installed"
+$(error "pkg-config not installed")
 endif
 
 ifeq ($(PANDOC),"")
@@ -53,48 +52,77 @@ ifeq ($(FUSE_AVAILABLE),0)
 $(error "FUSE development package doesn't appear available")
 endif
 
-OPTS 	= 	-O2
-SRC	=	$(wildcard src/*.cpp)
-OBJ     =       $(SRC:src/%.cpp=obj/%.o)
-DEPS    =       $(OBJ:obj/%.o=obj/%.d)
-TARGET  =       mergerfs
-MANPAGE = 	$(TARGET).1
-CFLAGS  =       -g -Wall \
-		$(OPTS) \
-                $(shell $(PKGCONFIG) fuse --cflags) \
-                -DFUSE_USE_VERSION=26 \
-                -MMD
-LDFLAGS	=       $(shell $(PKGCONFIG) fuse --libs)
+FLAG_NOPATH = $(shell $(CPPFIND) "flag_nopath")
+FALLOCATE   = $(shell $(CPPFIND) "fuse_fs_fallocate")
+FLOCK       = $(shell $(CPPFIND) "fuse_fs_flock")
+READ_BUF    = $(shell $(CPPFIND) "fuse_fs_read_buf")
+WRITE_BUF   = $(shell $(CPPFIND) "fuse_fs_write_buf")
 
-BINDIR 	=	$(PREFIX)/usr/bin
-MANDIR 	=	$(PREFIX)/usr/share/man/man1
-INSTALLTARGET = $(DESTDIR)/$(BINDIR)/$(TARGET)
-MANTARGET = 	$(DESTDIR)/$(MANDIR)/$(MANPAGE)
+UGID_USE_RWLOCK = 0
+
+OPTS 	    = -O2
+SRC	    = $(wildcard src/*.cpp)
+OBJ         = $(SRC:src/%.cpp=obj/%.o)
+DEPS        = $(OBJ:obj/%.o=obj/%.d)
+TARGET      = mergerfs
+MANPAGE     = $(TARGET).1
+FUSE_CFLAGS = $(shell $(PKGCONFIG) --cflags fuse)
+CFLAGS      = -g -Wall \
+	      $(OPTS) \
+	      -Wno-unused-result \
+              $(FUSE_CFLAGS) \
+              -DFUSE_USE_VERSION=29 \
+              -MMD \
+	      -DFLAG_NOPATH=$(FLAG_NOPATH) \
+	      -DFALLOCATE=$(FALLOCATE) \
+              -DFLOCK=$(FLOCK) \
+	      -DREAD_BUF=$(READ_BUF) \
+              -DWRITE_BUF=$(WRITE_BUF) \
+	      -DUGID_USE_RWLOCK=$(UGID_USE_RWLOCK)
+LDFLAGS       = $(shell $(PKGCONFIG) fuse --libs)
+
+PREFIX        = /usr/local
+EXEC_PREFIX   = $(PREFIX)
+DATAROOTDIR   = $(PREFIX)/share
+DATADIR       = $(DATAROOTDIR)
+BINDIR        = $(EXEC_PREFIX)/bin
+SBINDIR       = $(EXEC_PREFIX)/sbin
+MANDIR        = $(DATAROOTDIR)/man
+MAN1DIR       = $(MANDIR)/man1
+
+INSTALLBINDIR  = $(DESTDIR)$(BINDIR)
+INSTALLSBINDIR = $(DESTDIR)$(SBINDIR)
+INSTALLMAN1DIR = $(DESTDIR)$(MAN1DIR)
 
 ifeq ($(XATTR_AVAILABLE),0)
 $(warning "xattr not available: disabling")
 CFLAGS += -DWITHOUT_XATTR
 endif
 
-KERNEL = $(shell uname -s)
-ifeq ($(KERNEL),Linux)
-	CFLAGS += -DLINUX
-endif
-ifeq ($(KERNEL),Darwin)
-	CFLAGS += -DOSX
-endif
-
 all: $(TARGET)
 
 help:
 	@echo "usage: make"
 	@echo "make XATTR_AVAILABLE=0 - to build program without xattrs functionality (auto discovered otherwise)"
 
-$(TARGET): obj/obj-stamp $(OBJ)
+$(TARGET): src/version.hpp obj/obj-stamp $(OBJ)
 	$(CXX) $(CFLAGS) $(OBJ) -o $@ $(LDFLAGS)
 
+mount.mergerfs: $(TARGET)
+	$(LN) -fs "$<" "$@"
+
 changelog:
-	$(GIT) log --pretty --numstat --summary | git2cl > ChangeLog
+	$(GIT2DEBCL) --name $(TARGET) > ChangeLog
+
+authors:
+	$(GIT) log --format='%aN <%aE>' | sort -f | uniq > AUTHORS
+
+src/version.hpp:
+	$(eval VERSION := $(shell $(GIT) describe --always --tags --dirty))
+	@echo "#ifndef _VERSION_HPP" > src/version.hpp
+	@echo "#define _VERSION_HPP" >> src/version.hpp
+	@echo "static const char MERGERFS_VERSION[] = \"$(VERSION)\";" >> src/version.hpp
+	@echo "#endif" >> src/version.hpp
 
 obj/obj-stamp:
 	$(MKDIR) -p obj
@@ -103,42 +131,81 @@ obj/obj-stamp:
 obj/%.o: src/%.cpp
 	$(CXX) $(CFLAGS) -c $< -o $@
 
-clean:
-	$(RM) -rf obj "$(TARGET)" "$(MANPAGE)"
-	$(FIND) -name "*~" -delete
+clean: rpm-clean
+	$(RM) -rf obj
+	$(RM) -f src/version.hpp
+	$(RM) -f "$(TARGET)" mount.mergerfs
+	$(FIND) . -name "*~" -delete
 
 distclean: clean
-	$(GIT) clean -ifd
+	$(GIT) clean -fd
 
-install: $(TARGET) $(MANPAGE)
-	$(INSTALL) -m 0755 -D "$(TARGET)" "$(INSTALLTARGET)"
-	$(INSTALL) -m 0644 -D "$(MANPAGE)" "$(MANTARGET)"
+install: install-base install-mount.mergerfs install-man
 
-install-strip: install
-	$(STRIP) "$(INSTALLTARGET)"
+install-base: $(TARGET)
+	$(MKDIR) -p "$(INSTALLBINDIR)"
+	$(INSTALL) -v -m 0755 "$(TARGET)" "$(INSTALLBINDIR)/$(TARGET)"
 
-uninstall:
-	$(RM) "$(INSTALLTARGET)"
-	$(RM) "$(MANTARGET)"
+install-mount.mergerfs: mount.mergerfs
+	$(MKDIR) -p "$(INSTALLBINDIR)"
+	$(CP) -a "$<" "$(INSTALLBINDIR)/$<"
+
+install-man: $(MANPAGE)
+	$(MKDIR) -p "$(INSTALLMAN1DIR)"
+	$(INSTALL) -v -m 0644 "man/$(MANPAGE)" "$(INSTALLMAN1DIR)/$(MANPAGE)"
+
+install-strip: install-base
+	$(STRIP) "$(INSTALLBINDIR)/$(TARGET)"
+
+uninstall: uninstall-base uninstall-mount.mergerfs uninstall-man
+
+uninstall-base:
+	$(RM) -f "$(INSTALLBINDIR)/$(TARGET)"
+
+uninstall-mount.mergerfs:
+	$(RM) -f "$(INSTALLBINDIR)/mount.mergerfs"
+
+uninstall-man:
+	$(RM) -f "$(INSTALLMAN1DIR)/$(MANPAGE)"
 
 $(MANPAGE): README.md
-	$(PANDOC) -s -t man -o $(MANPAGE) README.md
+ifneq (,$(PANDOC))
+	$(PANDOC) -s -t man -o "man/$(MANPAGE)" README.md
+endif
 
 man: $(MANPAGE)
 
-tarball: clean changelog man
+tarball: clean man changelog authors src/version.hpp
 	$(eval VERSION := $(shell $(GIT) describe --always --tags --dirty))
+	$(eval VERSION := $(subst -,_,$(VERSION)))
 	$(eval FILENAME := $(TARGET)-$(VERSION))
 	$(eval TMPDIR := $(shell $(MKTEMP) --tmpdir -d .$(FILENAME).XXXXXXXX))
 	$(MKDIR) $(TMPDIR)/$(FILENAME)
 	$(CP) -ar . $(TMPDIR)/$(FILENAME)
-	$(TAR) --exclude=.git -cz -C $(TMPDIR) -f ../$(FILENAME).tar.gz $(FILENAME)
+	$(TAR) --exclude=.git -cz -C $(TMPDIR) -f $(FILENAME).tar.gz $(FILENAME)
 	$(RM) -rf $(TMPDIR)
 
-deb:
+debian-changelog:
+	$(GIT2DEBCL) --name $(TARGET) > debian/changelog
+
+signed-deb: debian-changelog
+	dpkg-buildpackage
+
+deb: debian-changelog
+	dpkg-buildpackage -uc -us
+
+rpm-clean:
+	$(RM) -rf rpmbuild
+
+rpm: tarball
 	$(eval VERSION := $(shell $(GIT) describe --always --tags --dirty))
-	$(GIT) dch --auto --release --new-version="$(VERSION)"
-	$(GIT) buildpackage --git-ignore-new
+	$(eval VERSION := $(subst -,_,$(VERSION)))
+	$(MKDIR) -p rpmbuild/BUILD rpmbuild/RPMS rpmbuild/SOURCES
+	$(SED) 's/__VERSION__/$(VERSION)/g' $(TARGET).spec > \
+		rpmbuild/SOURCES/$(TARGET).spec
+	cp -ar $(TARGET)-$(VERSION).tar.gz rpmbuild/SOURCES
+	$(RPMBUILD) -ba rpmbuild/SOURCES/$(TARGET).spec \
+		--define "_topdir $(CURDIR)/rpmbuild"
 
 .PHONY: all clean install help
 

README.md

@@ -1,136 +1,455 @@
 % mergerfs(1) mergerfs user manual
 % Antonio SJ Musumeci <trapexit@spawn.link>
-% June 9, 2014
+% 2016-10-13
 
 # NAME
 
-mergerfs - another FUSE union filesystem
+mergerfs - another (FUSE based) union filesystem
 
 # SYNOPSIS
 
-mergerfs -ocreate=epmfs,search=ff,action=ff &lt;srcpoints&gt; &lt;mountpoint&gt;
+mergerfs -o&lt;options&gt; &lt;srcmounts&gt; &lt;mountpoint&gt;
 
 # DESCRIPTION
 
-mergerfs is similar to mhddfs, unionfs, and aufs. Like mhddfs in that it too uses FUSE. Like aufs in that it provides multiple policies for how to handle behavior.
+**mergerfs** is a union filesystem geared towards simplifying storage and management of files across numerous commodity storage devices. It is similar to **mhddfs**, **unionfs**, and **aufs**.
 
-Why create mergerfs when those exist? mhddfs isn't really maintained or flexible. There are also issues with running as root. aufs is more flexible but contains some hard to debug inconsistencies in behavior. Neither support file attributes ([chattr](http://linux.die.net/man/1/chattr)).
+# FEATURES
+
+* Runs in userspace (FUSE)
+* Configurable behaviors
+* Support for extended attributes (xattrs)
+* Support for file attributes (chattr)
+* Runtime configurable (via xattrs)
+* Safe to run as root
+* Opportunistic credential caching
+* Works with heterogeneous filesystem types
+* Handling of writes to full drives (transparently move file to drive with capacity)
+* Handles pool of readonly and read/write drives
 
 # OPTIONS
 
 ###options###
 
-| Option | Default |
-|--------|--------|
-| search | ff |
-| action | ff |
-| create | epmfs |
+* **defaults**: a shortcut for FUSE's **atomic_o_trunc**, **auto_cache**, **big_writes**, **default_permissions**, **splice_move**, **splice_read**, and **splice_write**. These options seem to provide the best performance.
+* **direct_io**: causes FUSE to bypass an addition caching step which can increase write speeds at the detriment of read speed. 
+* **minfreespace**: the minimum space value used for creation policies. Understands 'K', 'M', and 'G' to represent kilobyte, megabyte, and gigabyte respectively. (default: 4G)
+* **moveonenospc**: when enabled (set to **true**) if a **write** fails with **ENOSPC** or **EDQUOT** a scan of all drives will be done looking for the drive with most free space which is at least the size of the file plus the amount which failed to write. An attempt to move the file to that drive will occur (keeping all metadata possible) and if successful the original is unlinked and the write retried. (default: false)
+* **func.&lt;func&gt;=&lt;policy&gt;**: sets the specific FUSE function's policy. See below for the list of value types. Example: **func.getattr=newest**
+* **category.&lt;category&gt;=&lt;policy&gt;**: Sets policy of all FUSE functions in the provided category. Example: **category.create=mfs**
+* **fsname**: sets the name of the filesystem as seen in **mount**, **df**, etc. Defaults to a list of the source paths concatenated together with the longest common prefix removed.
 
-###srcpoints###
+**NOTE:** Options are evaluated in the order listed so if the options are **func.rmdir=rand,category.action=ff** the **action** category setting will override the **rmdir** setting.
 
-The source points argument is a colon (':') delimited list of paths. To make it simplier to include multiple source points without having to modify your [fstab](http://linux.die.net/man/5/fstab) we also support [globbing](http://linux.die.net/man/7/glob).
+###srcmounts###
+
+The srcmounts (source mounts) argument is a colon (':') delimited list of paths to be included in the pool. It does not matter if the paths are on the same or different drives nor does it matter the filesystem. Used and available space will not be duplicated for paths on the same device and any features which aren't supported by the underlying filesystem (such as file attributes or extended attributes) will return the appropriate errors.
+
+To make it easier to include multiple source mounts mergerfs supports [globbing](http://linux.die.net/man/7/glob). **The globbing tokens MUST be escaped when using via the shell else the shell itself will expand it.**
 
 ```
-$ mergerfs /mnt/disk*:/mnt/cdrom /media/drives
+$ mergerfs -o defaults,allow_other /mnt/disk\*:/mnt/cdrom /media/drives
 ```
 
-The above line will use all points in /mnt prefixed with *disk* and the directory *cdrom*.
+The above line will use all mount points in /mnt prefixed with **disk** and the **cdrom**.
 
-In /etc/fstab it'd look like the following:
+To have the pool mounted at boot or otherwise accessable from related tools use **/etc/fstab**.
 
 ```
-# <file system>        <mount point>  <type>         <options>    <dump>  <pass>
-/mnt/disk*:/mnt/cdrom  /media/drives  fuse.mergerfs  allow_other  0       0
+# <file system>        <mount point>  <type>         <options>             <dump>  <pass>
+/mnt/disk*:/mnt/cdrom  /media/drives  fuse.mergerfs  defaults,allow_other  0       0
 ```
 
-**NOTE:** the globbing is done at mount time. If a new directory is added matching the glob after the fact it will not be included.
+**NOTE:** the globbing is done at mount or xattr update time (see below). If a new directory is added matching the glob after the fact it will not be automatically included.
 
-# POLICIES
+**NOTE:** for mounting via **fstab** to work you must have **mount.fuse** installed. For Ubuntu/Debian it is included in the **fuse** package.
 
-Filesystem calls are broken up into 4 functional categories: search, action, create, and none. These categories can be assigned a policy which dictates how [mergerfs](http://github.com/trapexit/mergerfs) behaves while when action on the filesystem. Any policy can be assigned to a category though some aren't terribly practical. For instance: rand (Random) may be useful for **create** but could lead to very odd behavior if used for **search** or **action**. Since the input for any policy is the source mounts and fusepath and the output a vector of targets the choice was made to simplify the implementation and allow a policies usage in any category. **NOTE:** In any policy which can return more than one location (currently only **all**) the first value will be used in **search** and **create** policies since they can only ever act on 1 filepath.
+# FUNCTIONS / POLICIES / CATEGORIES
 
-#### Functional classifications ####
-| Class | FUSE calls |
-|-------|------------|
-| search | access, getattr, getxattr, listxattr, open, readlink  |
-| action | chmod, link, removexattr, rmdir, setxattr, truncate, unlink, utimens |
-| create | create, mkdir, mknod |
-| none   | fallocate, fgetattr, fsync, ftruncate, ioctl, read, readdir, rename, statfs, symlink, write, release |
+The POSIX filesystem API has a number of functions. **creat**, **stat**, **chown**, etc. In mergerfs these functions are grouped into 3 categories: **action**, **create**, and **search**. Functions and categories can be assigned a policy which dictates how **mergerfs** behaves. Any policy can be assigned to a function or category though some are not very practical. For instance: **rand** (random) may be useful for file creation (create) but could lead to very odd behavior if used for `chmod` (though only if there were more than one copy of the file).
+
+Policies, when called to create, will ignore drives which are readonly or have less than **minfreespace**. This allows for read/write and readonly drives to be mixed together and keep drives which may remount as readonly on error from further affecting the pool.
+
+#### Function / Category classifications ####
+
+| Category | FUSE Functions |
+|----------|----------------|
+| action   | chmod, chown, link, removexattr, rename, rmdir, setxattr, truncate, unlink, utimens |
+| create   | create, mkdir, mknod, symlink |
+| search   | access, getattr, getxattr, ioctl, listxattr, open, readlink |
+| N/A      | fallocate, fgetattr, fsync, ftruncate, ioctl, read, readdir, release, statfs, write |
+
+Due to FUSE limitations **ioctl** behaves differently if its acting on a directory. It'll use the **getattr** policy to find and open the directory before issuing the **ioctl**. In other cases where something may be searched (to confirm a directory exists across all source mounts) **getattr** will also be used.
 
 #### Policy descriptions ####
+
 | Policy | Description |
 |--------------|-------------|
-| ff (first found) | Given the order the paths were provided at mount time act on the first one found (regardless if stat would return EACCES). |
-| ffwp (first found w/ permissions) | Given the order the paths were provided at mount time act on the first one found which you have access (stat does not error with EACCES). |
-| newest (newest file) | If multiple files exist return the one with the most recent mtime. |
-| all (all files found) | Attempt to apply the call to each file found. If any sub call succeeds the entire operation succeeds and other errors ignored. If all fail then the last error is reported. |
-| mfs (most free space) | Assuming the path is found to exist (ENOENT would not be returned) use the drive with the most free space available. |
-| epmfs (existing path, most free space) | If the path exists in multiple locations use the one with the most free space. Otherwise fall back to mfs. |
-| rand (random) | Pick a destination at random. Again the dirname of the full path must exist somewhere. |
+| all | Search category: acts like **ff**. Action category: apply to all found. Create category: for **mkdir**, **mknod**, and **symlink** it will apply to all found. **create** works like **ff**. It will exclude readonly drives and those with free space less than **minfreespace**. |
+| epall (existing path, all) | Search category: acts like **epff**. Action category: apply to all found. Create category: for **mkdir**, **mknod**, and **symlink** it will apply to all existing paths found. **create** works like **epff**. It will exclude readonly drives and those with free space less than **minfreespace**. |
+| epff | Given the order of the drives, as defined at mount time or when configured via the xattr interface, act on the first one found where the path already exists. For **create** category it will exclude readonly drives and those with free space less than **minfreespace** (unless there is no other option). Falls back to **ff**. |
+| eplfs (existing path, least free space) | If the path exists on multiple drives use the one with the least free space. For **create** category it will exclude readonly drives and those with free space less than **minfreespace**. Falls back to **lfs**. |
+| eplus (existing path, least used space) | If the path exists on multiple drives use the one with the least used space. For **create** category it will exclude readonly drives and those with free space less than **minfreespace**. Falls back to **lus**. |
+| epmfs (existing path, most free space) | If the path exists on multiple drives use the one with the most free space. For **create** category it will exclude readonly drives and those with free space less than **minfreespace**. Falls back to **mfs**. |
+| eprand (existing path, random) | Calls **epall** and then randomizes. |
+| erofs | Exclusively return **-1** with **errno** set to **EROFS**. By setting **create** functions to this you can in effect turn the filesystem readonly. |
+| ff (first found) | Given the order of the drives, as defined at mount time or when configured via xattr interface, act on the first one found. For **create** category it will exclude readonly drives and those with free space less than **minfreespace** (unless there is no other option). |
+| lfs (least free space) | Pick the drive with the least available free space. For **create** category it will exclude readonly drives and those with free space less than **minfreespace**. Falls back to **mfs**. |
+| lus (least used space) | Pick the drive with the least used space. For **create** category it will exclude readonly drives and those with free space less than **minfreespace**. Falls back to **mfs**. |
+| mfs (most free space) | Pick the drive with the most available free space. For **create** category it will exclude readonly drives and those with free space less than **minfreespace**. Falls back to **ff**. |
+| newest (newest file) | Pick the file / directory with the largest mtime. For **create** category it will exclude readonly drives and those with free space less than **minfreespace** (unless there is no other option). |
+| rand (random) | Calls **all** and then randomizes. |
+
+**epff**, **eplfs**, **eplus**, and **epmf** are path preserving policies. As the descriptions above explain they will only consider drives where the path being accessed exists. Non-path preserving policies will clone paths as necessary.
+
+#### Defaults ####
+
+| Category | Policy |
+|----------|--------|
+| action   | all    |
+| create   | epmfs  |
+| search   | ff     |
+
+#### rename & link ####
+
+[rename](http://man7.org/linux/man-pages/man2/rename.2.html) is a tricky function in a merged system. Normally if a rename can't be done atomically due to the source and destination paths existing on different mount points it will return **-1** with **errno = EXDEV**. The atomic rename is most critical for replacing files in place atomically (such as securing writing to a temp file and then replacing a target). The problem is that by merging multiple paths you can have N instances of the source and destinations on different drives. This can lead to several undesirable situtations with or without errors and it's not entirely obvious what to do when an error occurs.
+
+Originally mergerfs would return EXDEV whenever a rename was requested which was cross directory in any way. This made the code simple and was technically complient with POSIX requirements. However, many applications fail to handle EXDEV at all and treat it as a normal error or they only partially support EXDEV (don't respond the same as `mv` would). Such apps include: gvfsd-fuse v1.20.3 and prior, Finder / CIFS/SMB client in Apple OSX 10.9+, NZBGet, Samba's recycling bin feature.
+
+* If using a **create** policy which tries to preserve directory paths (epff,eplfs,eplus,epmfs)
+  * Using the **rename** policy get the list of files to rename
+  * For each file attempt rename:
+    * If failure with ENOENT run **create** policy
+    * If create policy returns the same drive as currently evaluating then clone the path
+    * Re-attempt rename
+  * If **any** of the renames succeed the higher level rename is considered a success
+  * If **no** renames succeed the first error encountered will be returned
+  * On success:
+    * Remove the target from all drives with no source file
+    * Remove the source from all drives which failed to rename
+* If using a **create** policy which does **not** try to preserve directory paths
+  * Using the **rename** policy get the list of files to rename
+  * Using the **getattr** policy get the target path
+  * For each file attempt rename:
+    * If the source drive != target drive:
+      * Clone target path from target drive to source drive
+    * Rename
+  * If **any** of the renames succeed the higher level rename is considered a success
+  * If **no** renames succeed the first error encountered will be returned
+  * On success:
+    * Remove the target from all drives with no source file
+    * Remove the source from all drives which failed to rename
+
+The the removals are subject to normal entitlement checks.
+
+The above behavior will help minimize the likelihood of EXDEV being returned but it will still be possible. To remove the possibility all together mergerfs would need to perform the as **mv** does when it receives EXDEV normally.
+
+**link** uses the same basic strategy.
+
+#### readdir ####
+
+[readdir](http://linux.die.net/man/3/readdir) is different from all other filesystem functions. While it could have it's own set of policies to tweak its behavior at this time it provides a simple union of files and directories found. Remember that any action or information queried about these files and directories come from the respective function. For instance: an **ls** is a **readdir** and for each file/directory returned **getattr** is called. Meaning the policy of **getattr** is responsible for choosing the file/directory which is the source of the metadata you see in an **ls**.
 
 #### statvfs ####
 
-It normalizes the source drives based on the fragment size and sums the number of adjusted blocks and inodes. This means you will see the combined space of all sources. Total, used, and free. The sources however are dedupped based on the drive so multiple points on the same drive will not result in double counting it's space.
-
-**NOTE:** create is really a search for existence and then create. The 'search' policy applies to the first part. If the [dirname](http://linux.die.net/man/3/dirname) of the full path is not found to exist [ENOENT](http://linux.die.net/man/3/errno) is returned.
+[statvfs](http://linux.die.net/man/2/statvfs) normalizes the source drives based on the fragment size and sums the number of adjusted blocks and inodes. This means you will see the combined space of all sources. Total, used, and free. The sources however are dedupped based on the drive so multiple sources on the same drive will not result in double counting it's space.
 
 # BUILDING
 
-* Need to install FUSE development libraries (libfuse-dev).
-* Optionally need libattr1 (libattr1-dev).
+**NOTE:** Prebuilt packages can be found at: https://github.com/trapexit/mergerfs/releases
 
+First get the code from [github](http://github.com/trapexit/mergerfs).
 
 ```
-[trapexit:~/dev/mergerfs] $ make help
-usage: make
-make XATTR_AVAILABLE=0 - to build program without xattrs functionality (auto discovered otherwise)
+$ git clone https://github.com/trapexit/mergerfs.git
+$ # or
+$ wget https://github.com/trapexit/mergerfs/releases/download/<ver>/mergerfs-<ver>.tar.gz
 ```
 
-# Runtime Settings
+#### Debian / Ubuntu
+```
+$ sudo apt-get install g++ pkg-config git git-buildpackage pandoc debhelper libfuse-dev libattr1-dev python
+$ cd mergerfs
+$ make deb
+$ sudo dpkg -i ../mergerfs_version_arch.deb
+```
 
-#### /.mergerfs pseudo file ####
+#### Fedora
+```
+$ su -
+# dnf install rpm-build fuse-devel libattr-devel pandoc gcc-c++ git make which python
+# cd mergerfs
+# make rpm
+# rpm -i rpmbuild/RPMS/<arch>/mergerfs-<verion>.<arch>.rpm
+```
+
+#### Generically
+
+Have git, python, pkg-config, pandoc, libfuse, libattr1 installed.
+
+```
+$ cd mergerfs
+$ make
+$ make man
+$ sudo make install
+```
+
+# RUNTIME
+
+#### .mergerfs pseudo file ####
 ```
 <mountpoint>/.mergerfs
 ```
 
-There is a pseudo file available at the mountpoint which allows for the runtime modification of policies. The file will not show up in readdirs but can be stat'ed, read, and writen. Most other calls will fail with EPERM, EINVAL, or whatever may be appropriate for that call. Anything not understood while writing will result in EINVAL otherwise the number of bytes written will be returned.
+There is a pseudo file available at the mount point which allows for the runtime modification of certain **mergerfs** options. The file will not show up in **readdir** but can be **stat**'ed and manipulated via [{list,get,set}xattrs](http://linux.die.net/man/2/listxattr) calls.
 
-Reading the file will result in a newline delimited list of current settings as followed:
+Even if xattrs are disabled for mergerfs the [{list,get,set}xattrs](http://linux.die.net/man/2/listxattr) calls against this pseudo file will still work.
+
+Any changes made at runtime are **not** persisted. If you wish for values to persist they must be included as options wherever you configure the mounting of mergerfs (fstab).
+
+##### Keys #####
+
+Use `xattr -l /mount/point/.mergerfs` to see all supported keys. Some are informational and therefore readonly.
+
+###### user.mergerfs.srcmounts ######
+
+Used to query or modify the list of source mounts. When modifying there are several shortcuts to easy manipulation of the list.
+
+| Value        | Description |
+|--------------|-------------|
+| [list]       | set         |
+| +<[list]     | prepend     |
+| +>[list]     | append      |
+| -[list]      | remove all values provided |
+| -<           | remove first in list |
+| ->           | remove last in list |
+
+###### minfreespace ######
+
+Input: interger with an optional multiplier suffix. **K**, **M**, or **G**.
+
+Output: value in bytes
+
+###### moveonenospc ######
+
+Input: **true** and **false**
+
+Ouput: **true** or **false**
+
+###### categories / funcs ######
+
+Input: short policy string as described elsewhere in this document
+
+Output: the policy string except for categories where its funcs have multiple types. In that case it will be a comma separated list
+
+##### Example #####
 
 ```
-[trapexit:/tmp/mount] $ cat .mergerfs
-action=ff
-create=epmfs
-search=ff
-```
+[trapexit:/tmp/mount] $ xattr -l .mergerfs
+user.mergerfs.srcmounts: /tmp/a:/tmp/b
+user.mergerfs.minfreespace: 4294967295
+user.mergerfs.moveonenospc: false
+...
 
-Writing to the file is buffered and waits till a newline to process. Meaning echo works well.
-
-```
-[trapexit:/tmp/mount] $ echo "search=newest" >> .mergerfs
-[trapexit:/tmp/mount] $ cat .mergerfs
-action=ff
-create=epmfs
-search=newest
-```
-
-*NOTE:* offset is not supported and ignored in both read and write. There is also a safety check which limits buffered + incoming length to a max of 1024 bytes.
-
-#### xattrs ####
-
-If xattrs has been enabled you can also use [{list,get,set}xattrs](http://linux.die.net/man/2/listxattr) on the pseudo file **.mergerfs** to modify the policies. The keys are **mergerfs.action**, **mergerfs.create**, and **mergerfs.search**.
-
-```
-[trapexit:/tmp/mount] $ attr -l .mergerfs
-Attribute "mergerfs.action" has a 2 byte value for .mergerfs
-Attribute "mergerfs.create" has a 5 byte value for .mergerfs
-Attribute "mergerfs.search" has a 2 byte value for .mergerfs
-
-[trapexit:/tmp/mount] $ attr -g mergerfs.action .mergerfs
-Attribute "mergerfs.action" had a 2 byte value for .mergerfs:
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.category.search .mergerfs
 ff
 
-[trapexit:/tmp/mount] 1 $ attr -s mergerfs.action -V ffwp .mergerfs
-Attribute "mergerfs.action" set to a 4 byte value for .mergerfs:
-ffwp
+[trapexit:/tmp/mount] $ xattr -w user.mergerfs.category.search newest .mergerfs
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.category.search .mergerfs
+newest
+
+[trapexit:/tmp/mount] $ xattr -w user.mergerfs.srcmounts +/tmp/c .mergerfs
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.srcmounts .mergerfs
+/tmp/a:/tmp/b:/tmp/c
+
+[trapexit:/tmp/mount] $ xattr -w user.mergerfs.srcmounts =/tmp/c .mergerfs
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.srcmounts .mergerfs
+/tmp/c
+
+[trapexit:/tmp/mount] $ xattr -w user.mergerfs.srcmounts '+</tmp/a:/tmp/b' .mergerfs
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.srcmounts .mergerfs
+/tmp/a:/tmp/b:/tmp/c
 ```
+
+#### file / directory xattrs ####
+
+While they won't show up when using [listxattr](http://linux.die.net/man/2/listxattr) **mergerfs** offers a number of special xattrs to query information about the files served. To access the values you will need to issue a [getxattr](http://linux.die.net/man/2/getxattr) for one of the following:
+
+* **user.mergerfs.basepath:** the base mount point for the file given the current getattr policy
+* **user.mergerfs.relpath:** the relative path of the file from the perspective of the mount point
+* **user.mergerfs.fullpath:** the full path of the original file given the getattr policy
+* **user.mergerfs.allpaths:** a NUL ('\0') separated list of full paths to all files found
+
+```
+[trapexit:/tmp/mount] $ ls
+A B C
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.fullpath A
+/mnt/a/full/path/to/A
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.basepath A
+/mnt/a
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.relpath A
+/full/path/to/A
+[trapexit:/tmp/mount] $ xattr -p user.mergerfs.allpaths A | tr '\0' '\n'
+/mnt/a/full/path/to/A
+/mnt/b/full/path/to/A
+```
+
+# TOOLING
+
+* https://github.com/trapexit/mergerfs-tools
+  * mergerfs.ctl: A tool to make it easier to query and configure mergerfs at runtime
+  * mergerfs.fsck: Provides permissions and ownership auditing and the ability to fix them
+  * mergerfs.dedup: Will help identify and optionally remove duplicate files
+  * mergerfs.mktrash: Creates FreeDesktop.org Trash specification compatible directories on a mergerfs mount
+* https://github.com/trapexit/scorch
+  * scorch: A tool to help discover silent corruption of files
+
+# TIPS / NOTES
+
+* https://github.com/trapexit/backup-and-recovery-howtos : A set of guides / howtos on creating a data storage system, backing it up, maintaining it, and recovering from failure.
+* If you don't see some directories / files you expect in a merged point be sure the user has permission to all the underlying directories. If `/drive0/a` has is owned by `root:root` with ACLs set to `0700` and `/drive1/a` is `root:root` and `0755` you'll see only `/drive1/a`. Use `mergerfs.fsck` to audit the drive for out of sync permissions.
+* Do *not* use `direct_io` if you expect applications (such as rtorrent) to [mmap](http://linux.die.net/man/2/mmap) files. It is not currently supported in FUSE w/ `direct_io` enabled.
+* Since POSIX gives you only error or success on calls its difficult to determine the proper behavior when applying the behavior to multiple targets. **mergerfs** will return an error only if all attempts of an action fail. Any success will lead to a success returned.
+* The recommended options are **defaults,allow_other**. The **allow_other** is to allow users who are not the one which executed mergerfs access to the mountpoint. **defaults** is described above and should offer the best performance. It's possible that if you're running on an older platform the **splice** features aren't available and could error. In that case simply use the other options manually.
+* If write performance is valued more than read it may be useful to enable **direct_io**. Best to benchmark with and without and choose appropriately.
+* Remember: some policies mixed with some functions may result in strange behaviors. Not that some of these behaviors and race conditions couldn't happen outside **mergerfs** but that they are far more likely to occur on account of attempt to merge together multiple sources of data which could be out of sync due to the different policies.
+* An example: [Kodi](http://kodi.tv) and [Plex](http://plex.tv) can use directory [mtime](http://linux.die.net/man/2/stat) to more efficiently determine whether to scan for new content rather than simply performing a full scan. If using the current default **getattr** policy of **ff** its possible **Kodi** will miss an update on account of it returning the first directory found's **stat** info and its a later directory on another mount which had the **mtime** recently updated. To fix this you will want to set **func.getattr=newest**. Remember though that this is just **stat**. If the file is later **open**'ed or **unlink**'ed and the policy is different for those then a completely different file or directory could be acted on.
+* Due to previously mentioned issues its generally best to set **category** wide policies rather than individual **func**'s. This will help limit the confusion of tools such as [rsync](http://linux.die.net/man/1/rsync).
+
+# KNOWN ISSUES / BUGS
+
+#### rtorrent fails with ENODEV (No such device)
+
+Be sure to turn off `direct_io`. rtorrent and some other applications use [mmap](http://linux.die.net/man/2/mmap) to read and write to files and offer no failback to traditional methods. FUSE does not currently support mmap while using `direct_io`. There will be a performance penalty on writes with `direct_io` off but it's the only way to get such applications to work. If the performance loss is too high for other apps you can mount mergerfs twice. Once with `direct_io` enabled and one without it.
+
+#### mmap performance is really bad
+
+There [is a bug](https://lkml.org/lkml/2016/3/16/260) in caching which affects overall performance of mmap through FUSE in Linux 4.x kernels. It is fixed in [4.4.10 and 4.5.4](https://lkml.org/lkml/2016/5/11/59). 
+
+#### Trashing files occasionally fails
+
+This is the same issue as with Samba. `rename` returns `EXDEV` (in our case that will really only happen with path preserving policies like `epmfs`) and the software doesn't handle the situtation well. This is unfortunately a common failure of software which moves files around. The standard indicates that an implementation `MAY` choose to support non-user home directory trashing of files (which is a `MUST`). The implementation `MAY` also support "top directory trashes" which many probably do. 
+
+To create a `$topdir/.Trash` directory as defined in the standard use the [mergerfs-tools](https://github.com/trapexit/mergerfs-tools) tool `mergerfs.mktrash`.
+
+#### Samba: Moving files / directories fails
+
+Workaround: Copy the file/directory and then remove the original rather than move.
+
+This isn't an issue with Samba but some SMB clients. GVFS-fuse v1.20.3 and prior (found in Ubuntu 14.04 among others) failed to handle certain error codes correctly. Particularly **STATUS_NOT_SAME_DEVICE** which comes from the **EXDEV** which is returned by **rename** when the call is crossing mount points. When a program gets an **EXDEV** it needs to explicitly take an alternate action to accomplish it's goal. In the case of **mv** or similar it tries **rename** and on **EXDEV** falls back to a manual copying of data between the two locations and unlinking the source. In these older versions of GVFS-fuse if it received **EXDEV** it would translate that into **EIO**. This would cause **mv** or most any application attempting to move files around on that SMB share to fail with a IO error.
+
+[GVFS-fuse v1.22.0](https://bugzilla.gnome.org/show_bug.cgi?id=734568) and above fixed this issue but a large number of systems use the older release. On Ubuntu the version can be checked by issuing `apt-cache showpkg gvfs-fuse`. Most distros released in 2015 seem to have the updated release and will work fine but older systems may not. Upgrading gvfs-fuse or the distro in general will address the problem.
+
+In Apple's MacOSX 10.9 they replaced Samba (client and server) with their own product. It appears their new client does not handle **EXDEV** either and responds similar to older release of gvfs on Linux.
+
+#### Supplemental user groups
+
+Due to the overhead of [getgroups/setgroups](http://linux.die.net/man/2/setgroups) mergerfs utilizes a cache. This cache is opportunistic and per thread. Each thread will query the supplemental groups for a user when that particular thread needs to change credentials and will keep that data for the lifetime of the thread. This means that if a user is added to a group it may not be picked up without the restart of mergerfs. However, since the high level FUSE API's (at least the standard version) thread pool dynamically grows and shrinks it's possible that over time a thread will be killed and later a new thread with no cache will start and query the new data.
+
+The gid cache uses fixed storage to simplify the design and be compatible with older systems which may not have C++11 compilers. There is enough storage for 256 users' supplemental groups. Each user is allowed upto 32 supplemental groups. Linux >= 2.6.3 allows upto 65535 groups per user but most other *nixs allow far less. NFS allowing only 16. The system does handle overflow gracefully. If the user has more than 32 supplemental groups only the first 32 will be used. If more than 256 users are using the system when an uncached user is found it will evict an existing user's cache at random. So long as there aren't more than 256 active users this should be fine. If either value is too low for your needs you will have to modify `gidcache.hpp` to increase the values. Note that doing so will increase the memory needed by each thread.
+
+#### mergerfs or libfuse crashing
+
+If suddenly the mergerfs mount point disappears and `Transport endpoint is not connected` is returned when attempting to perform actions within the mount directory **and** the version of libfuse (use `mergerfs -v` to find the version) is older than `2.9.4` its likely due to a bug in libfuse. Affected versions of libfuse can be found in Debian Wheezy, Ubuntu Precise and others.
+
+In order to fix this please install newer versions of libfuse. If using a Debian based distro (Debian,Ubuntu,Mint) you can likely just install newer versions of [libfuse](https://packages.debian.org/unstable/libfuse2) and [fuse](https://packages.debian.org/unstable/fuse) from the repo of a newer release.
+
+#### mergerfs under heavy load and memory preasure leads to kernel panic
+
+https://lkml.org/lkml/2016/9/14/527
+
+```
+[25192.515454] kernel BUG at /build/linux-a2WvEb/linux-4.4.0/mm/workingset.c:346!
+[25192.517521] invalid opcode: 0000 [#1] SMP
+[25192.519602] Modules linked in: netconsole ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 configfs binfmt_misc veth bridge stp llc nf_conntrack_ipv6 nf_defrag_ipv6 xt_conntrack ip6table_filter ip6_tables xt_multiport iptable_filter ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_comment xt_nat iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_CHECKSUM xt_tcpudp iptable_mangle ip_tables x_tables intel_rapl x86_pkg_temp_thermal intel_powerclamp eeepc_wmi asus_wmi coretemp sparse_keymap kvm_intel ppdev kvm irqbypass mei_me 8250_fintek input_leds serio_raw parport_pc tpm_infineon mei shpchp mac_hid parport lpc_ich autofs4 drbg ansi_cprng dm_crypt algif_skcipher af_alg btrfs raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear raid10 raid1 i915 crct10dif_pclmul crc32_pclmul aesni_intel i2c_algo_bit aes_x86_64 drm_kms_helper lrw gf128mul glue_helper ablk_helper syscopyarea cryptd sysfillrect sysimgblt fb_sys_fops drm ahci r8169 libahci mii wmi fjes video [last unloaded: netconsole]
+[25192.540910] CPU: 2 PID: 63 Comm: kswapd0 Not tainted 4.4.0-36-generic #55-Ubuntu
+[25192.543411] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 3904 04/27/2013
+[25192.545840] task: ffff88040cae6040 ti: ffff880407488000 task.ti: ffff880407488000
+[25192.548277] RIP: 0010:[<ffffffff811ba501>]  [<ffffffff811ba501>] shadow_lru_isolate+0x181/0x190
+[25192.550706] RSP: 0018:ffff88040748bbe0  EFLAGS: 00010002
+[25192.553127] RAX: 0000000000001c81 RBX: ffff8802f91ee928 RCX: ffff8802f91eeb38
+[25192.555544] RDX: ffff8802f91ee938 RSI: ffff8802f91ee928 RDI: ffff8804099ba2c0
+[25192.557914] RBP: ffff88040748bc08 R08: 000000000001a7b6 R09: 000000000000003f
+[25192.560237] R10: 000000000001a750 R11: 0000000000000000 R12: ffff8804099ba2c0
+[25192.562512] R13: ffff8803157e9680 R14: ffff8803157e9668 R15: ffff8804099ba2c8
+[25192.564724] FS:  0000000000000000(0000) GS:ffff88041f280000(0000) knlGS:0000000000000000
+[25192.566990] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
+[25192.569201] CR2: 00007ffabb690000 CR3: 0000000001e0a000 CR4: 00000000000406e0
+[25192.571419] Stack:
+[25192.573550]  ffff8804099ba2c0 ffff88039e4f86f0 ffff8802f91ee928 ffff8804099ba2c8
+[25192.575695]  ffff88040748bd08 ffff88040748bc58 ffffffff811b99bf 0000000000000052
+[25192.577814]  0000000000000000 ffffffff811ba380 000000000000008a 0000000000000080
+[25192.579947] Call Trace:
+[25192.582022]  [<ffffffff811b99bf>] __list_lru_walk_one.isra.3+0x8f/0x130
+[25192.584137]  [<ffffffff811ba380>] ? memcg_drain_all_list_lrus+0x190/0x190
+[25192.586165]  [<ffffffff811b9a83>] list_lru_walk_one+0x23/0x30
+[25192.588145]  [<ffffffff811ba544>] scan_shadow_nodes+0x34/0x50
+[25192.590074]  [<ffffffff811a0e9d>] shrink_slab.part.40+0x1ed/0x3d0
+[25192.591985]  [<ffffffff811a53da>] shrink_zone+0x2ca/0x2e0
+[25192.593863]  [<ffffffff811a64ce>] kswapd+0x51e/0x990
+[25192.595737]  [<ffffffff811a5fb0>] ? mem_cgroup_shrink_node_zone+0x1c0/0x1c0
+[25192.597613]  [<ffffffff810a0808>] kthread+0xd8/0xf0
+[25192.599495]  [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
+[25192.601335]  [<ffffffff8182e34f>] ret_from_fork+0x3f/0x70
+[25192.603193]  [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
+```
+
+There is a bug in the kernel. A work around appears to be turning off `splice`. Add `no_splice_write,no_splice_move,no_splice_read` to mergerfs' options. Should be placed after `defaults` if it is used since it will turn them on.
+
+# FAQ
+
+#### Why use mergerfs over mhddfs?
+
+mhddfs is no longer maintained and has some known stability and security issues (see below). MergerFS provides a superset of mhddfs' features and should offer the same or maybe better performance.
+
+#### Why use mergerfs over aufs?
+
+While aufs can offer better peak performance mergerfs offers more configurability and is generally easier to use. mergerfs however doesn't offer the same overlay features (which tends to result in whiteout files being left around the underlying filesystems.)
+
+#### Why use mergerfs over LVM/ZFS/BTRFS/RAID0 drive concatenation / striping?
+
+With simple JBOD / drive concatenation / stripping / RAID0 a single drive failure will lead to full pool failure. mergerfs performs a similar behavior without the catastrophic failure and general lack of recovery. Drives can fail and all other data will continue to be accessable.
+
+When combined with something like [SnapRaid](http://www.snapraid.it) and/or an offsite full backup solution you can have the flexibilty of JBOD without the single point of failure.
+
+#### Can drives be written to directly? Outside of mergerfs while pooled?
+
+Yes. It will be represented immediately in the pool as the policies would describe.
+
+#### Why do I get an "out of space" error even though the system says there's lots of space left?
+
+Please reread the sections above about policies, path preserving, and the **moveonenospc** option. If the policy is path preserving and a drive is almost full and the drive the policy would pick then the writing of the file may fill the drive and receive ENOSPC errors. That is expected with those settings. If you don't want that: enable **moveonenospc** and don't use a path preserving policy.
+
+
+#### It's mentioned that there are some security issues with mhddfs. What are they? How does mergerfs address them?
+
+[mhddfs](https://github.com/trapexit/mhddfs) tries to handle being run as **root** by calling [getuid()](https://github.com/trapexit/mhddfs/blob/cae96e6251dd91e2bdc24800b4a18a74044f6672/src/main.c#L319) and if it returns **0** then it will [chown](http://linux.die.net/man/1/chown) the file. Not only is that a race condition but it doesn't handle many other situations. Rather than attempting to simulate POSIX ACL behaviors the proper behavior is to use [seteuid](http://linux.die.net/man/2/seteuid) and [setegid](http://linux.die.net/man/2/setegid), become the user making the original call and perform the action as them. This is how [mergerfs](https://github.com/trapexit/mergerfs) handles things.
+
+If you are familiar with POSIX standards you'll know that this behavior poses a problem. **seteuid** and **setegid** affect the whole process and **libfuse** is multithreaded by default. We'd need to lock access to **seteuid** and **setegid** with a mutex so that the several threads aren't stepping on one anofther and files end up with weird permissions and ownership. This however wouldn't scale well. With lots of calls the contention on that mutex would be extremely high. Thankfully on Linux and OSX we have a better solution.
+
+OSX has a [non-portable pthread extension](https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/pthread_setugid_np.2.html) for per-thread user and group impersonation.
+
+Linux does not support [pthread_setugid_np](https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/pthread_setugid_np.2.html) but user and group IDs are a per-thread attribute though documentation on that fact or how to manipulate them is not well distributed. From the **4.00** release of the Linux man-pages project for [setuid](http://man7.org/linux/man-pages/man2/setuid.2.html).
+
+> At the kernel level, user IDs and group IDs are a per-thread attribute.  However, POSIX requires that all threads in a process share the same credentials.  The NPTL threading implementation handles the POSIX requirements by providing wrapper functions for the various system calls that change process UIDs and GIDs.  These wrapper functions (including the one for setuid()) employ a signal-based technique to ensure that when one thread changes credentials, all of the other threads in the process also change their credentials.  For details, see nptl(7).
+
+Turns out the setreuid syscalls apply only to the thread. GLIBC hides this away using RT signals to inform all threads to change credentials. Taking after **Samba** mergerfs uses **syscall(SYS_setreuid,...)** to set the callers credentials for that thread only. Jumping back to **root** as necessary should escalated privileges be needed (for instance: to clone paths).
+
+For non-Linux systems mergerfs uses a read-write lock and changes credentials only when necessary. If multiple threads are to be user X then only the first one will need to change the processes credentials. So long as the other threads need to be user X they will take a readlock allow multiple threads to share the credentials. Once a request comes in to run as user Y that thread will attempt a write lock and change to Y's credentials when it can. If the ability to give writers priority is supported then that flag will be used so threads trying to change credentials don't starve. This isn't the best solution but should work reasonably well. As new platforms are supported if they offer per thread credentials those APIs will be adopted.
+
+# SUPPORT
+
+#### Issues with the software
+* github.com: https://github.com/trapexit/mergerfs/issues
+* email: trapexit@spawn.link
+
+#### Support development
+* Gratipay: https://gratipay.com/~trapexit
+* BitCoin: 12CdMhEPQVmjz3SSynkAEuD5q9JmhTDCZA
+
+# LINKS
+
+* http://github.com/trapexit/mergerfs
+* http://github.com/trapexit/mergerfs-tools
+* http://github.com/trapexit/scorch
+* http://github.com/trapexit/backup-and-recovery-howtos

debian/changelog

@@ -1,27 +0,0 @@
-mergerfs (1.1.0) trusty; urgency=medium
-
-  * initial code commit
-  * fix building without libattr
-  * update build instructions in readme
-  * use {get,list,set}xattr to modify runtime
-  * use long instead of int to limit possibility of overflow in switch, closes #1
-  * add FS_IOC_{GET}VERSION to ioctl
-  * remove statfs policy
-  * fs::make_path should check for forward slashes, add if missing
-  * remove stat'ing of files in readdir. closes #3
-  * use eaccess to determine permissions for ffwp. closes #2
-  * rework policy code
-  * add fgetattr. closes #5
-  * when readdir's filler returns non-zero return ENOMEM. closes #7
-  * enhance Makefile
-  * further Makefile enhancements
-  * fix free space calculations. closes #8
-  * add debian package building
-
- -- Antonio SJ Musumeci <trapexit@spawn.link>  Fri, 30 May 2014 21:32:19 -0400
-
-mergerfs (1.0.0) trusty; urgency=medium
-
-  * Initial commit
-
- -- Antonio SJ Musumeci <trapexit@spawn.link>  Fri, 30 May 2014 21:28:09 -0400

debian/copyright

@@ -4,28 +4,22 @@ Source: http://github.com/trapexit/mergerfs
 
 Files: *
 Copyright: 2014 Antonio SJ Musumeci <trapexit@spawn.link>
-License: MIT
+License: ISC
 
 Files: debian/*
 Copyright: 2014 Antonio SJ Musumeci <trapexit@spawn.link>
-License: MIT
+License: ISC
 
-License: MIT
- Permission is hereby granted, free of charge, to any person obtaining a
- copy of this software and associated documentation files (the "Software"),
- to deal in the Software without restriction, including without limitation
- the rights to use, copy, modify, merge, publish, distribute, sublicense,
- and/or sell copies of the Software, and to permit persons to whom the
- Software is furnished to do so, subject to the following conditions:
- .
- The above copyright notice and this permission notice shall be included
- in all copies or substantial portions of the Software.
- .
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-n
+License: ISC
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+  .
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+n

debian/files

@@ -1 +0,0 @@
-mergerfs_1.1.0_amd64.deb utils optional

debian/rules

@@ -6,3 +6,6 @@
 
 %:
 	dh $@
+
+override_dh_auto_install:
+	$(MAKE) DESTDIR=$(CURDIR)/debian/mergerfs PREFIX=/usr install

mergerfs.spec

@@ -0,0 +1,51 @@
+Name:		mergerfs
+Version:	__VERSION__
+Release:	1%{?dist}
+Summary:	A FUSE union filesystem
+
+Group:		Applications/System
+License:	ISC
+URL:		https://github.com/trapexit/mergerfs
+
+Source:		mergerfs-%{version}.tar.gz
+
+BuildRequires:	gcc-c++
+BuildRequires:	libattr-devel
+BuildRequires:	fuse-devel
+# rpmbuild driven by the Makefile uses git to generate a version number
+BuildRequires:	git
+
+Requires:	fuse
+
+%prep
+%setup -q
+
+%description
+mergerfs is similar to mhddfs, unionfs, and aufs. Like mhddfs in that it too
+uses FUSE. Like aufs in that it provides multiple policies for how to handle
+behavior.
+
+%build
+make %{?_smp_mflags}
+
+%install
+make install PREFIX=%{_prefix} DESTDIR=%{buildroot}
+
+%files
+%{_bindir}/*
+%doc %{_mandir}/*
+
+%changelog
+* Mon Jan 25 2016 Antonio SJ Musumeci <trapexit@spawn.link>
+- Remove sbin files
+
+* Sat Sep 05 2015 Antonio SJ Musumeci <trapexit@spawn.link>
+- Include PREFIX to install
+
+* Mon Dec 29 2014 Joe Lawrence <joe.lawrence@stratus.com>
+- Tweak rpmbuild to archive current git HEAD into a tarball, then (re)build in
+  the rpmbuild directory -- more complicated but seemingly better suited to
+  generate source and debug rpms.
+
+* Fri Jun 20 2014 Joe Lawrence <joe.lawrence@stratus.com>
+- Initial rpm spec file.

src/access.cpp

@@ -1,87 +1,73 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
-#include <fuse.h>
-
 #include <string>
 #include <vector>
 
-#include <unistd.h>
-#include <errno.h>
-
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
-#include "assert.hpp"
+#include "errno.hpp"
+#include "fs_base_access.hpp"
+#include "fs_path.hpp"
+#include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
 using mergerfs::Policy;
+using mergerfs::Category;
 
 static
 int
-_access(const fs::SearchFunc  searchFunc,
+_access(Policy::Func::Search  searchFunc,
         const vector<string> &srcmounts,
-        const string          fusepath,
+        const uint64_t        minfreespace,
+        const char           *fusepath,
         const int             mask)
 {
   int rv;
-  fs::PathVector path;
+  string fullpath;
+  vector<const string*> basepaths;
 
-  searchFunc(srcmounts,fusepath,path);
-  if(path.empty())
-    return -ENOENT;
+  rv = searchFunc(srcmounts,fusepath,minfreespace,basepaths);
+  if(rv == -1)
+    return -errno;
 
-  rv = ::eaccess(path[0].full.c_str(),mask);
+  fs::path::make(basepaths[0],fusepath,fullpath);
+
+  rv = fs::eaccess(fullpath,mask);
 
   return ((rv == -1) ? -errno : 0);
 }
 
 namespace mergerfs
 {
-  namespace access
+  namespace fuse
   {
     int
     access(const char *fusepath,
            int         mask)
     {
-      const struct fuse_context *fc     = fuse_get_context();
-      const config::Config      &config = config::get();
-      const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
+      const fuse_context      *fc     = fuse_get_context();
+      const Config            &config = Config::get(fc);
+      const ugid::Set          ugid(fc->uid,fc->gid);
+      const rwlock::ReadGuard  readlock(&config.srcmountslock);
 
-      if(fusepath == config.controlfile)
-        return _access(*config.search,
-                       config.srcmounts,
-                       "/",
-                       mask);
-
-      return _access(*config.search,
+      return _access(config.access,
                      config.srcmounts,
+                     config.minfreespace,
                      fusepath,
                      mask);
     }

src/access.hpp

@@ -1,30 +1,22 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 namespace mergerfs
 {
-  namespace access
+  namespace fuse
   {
     int
     access(const char *fusepath,

src/assert.hpp

@@ -1,25 +1,17 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #define STATIC_ASSERT(cond) assert::StaticAssert< (cond) >()

src/buildmap.hpp

@@ -1,25 +1,17 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <algorithm>

src/buildvector.hpp

@@ -1,25 +1,17 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <algorithm>

src/category.cpp

@@ -1,25 +1,17 @@
 /*
-  The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-  Permission is hereby granted, free of charge, to any person obtaining a copy
-  of this software and associated documentation files (the "Software"), to deal
-  in the Software without restriction, including without limitation the rights
-  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-  copies of the Software, and to permit persons to whom the Software is
-  furnished to do so, subject to the following conditions:
-
-  The above copyright notice and this permission notice shall be included in
-  all copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-  THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <string>
@@ -38,16 +30,16 @@ namespace mergerfs
     (CATEGORY(action))
     (CATEGORY(create))
     (CATEGORY(search));
-  
+
   const Category * const Category::categories = &_categories_[1];
 
   const Category &Category::invalid = Category::categories[Category::Enum::invalid];
   const Category &Category::action  = Category::categories[Category::Enum::action];
   const Category &Category::create  = Category::categories[Category::Enum::create];
-  const Category &Category::search  = Category::categories[Category::Enum::search];  
-  
+  const Category &Category::search  = Category::categories[Category::Enum::search];
+
   const Category&
-  Category::find(const std::string str)
+  Category::find(const std::string &str)
   {
     for(int i = Enum::BEGIN; i != Enum::END; ++i)
       {
@@ -66,5 +58,5 @@ namespace mergerfs
       return categories[i];
 
     return invalid;
-  }  
+  }
 }

src/category.hpp

@@ -1,25 +1,17 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #ifndef __CATEGORY_HPP__
@@ -57,8 +49,8 @@ namespace mergerfs
     {
     }
 
-    Category(const Enum::Type  enum_,
-             const std::string str_)
+    Category(const Enum::Type   enum_,
+             const std::string &str_)
       : _enum(enum_),
         _str(str_)
     {
@@ -66,15 +58,15 @@ namespace mergerfs
 
   public:
     operator const Enum::Type() const { return _enum; }
-    operator const std::string() const { return _str; }
+    operator const std::string&() const { return _str; }
     operator const Category*() const { return this; }
 
-    bool operator==(const std::string str_) const
+    bool operator==(const std::string &str_) const
     { return _str == str_; }
 
     bool operator==(const Enum::Type enum_) const
-    { return _enum == enum_; }    
-    
+    { return _enum == enum_; }
+
     bool operator!=(const Category &r) const
     { return _enum != r._enum; }
 
@@ -82,7 +74,7 @@ namespace mergerfs
     { return _enum < r._enum; }
 
   public:
-    static const Category &find(const std::string);
+    static const Category &find(const std::string&);
     static const Category &find(const Enum::Type);
 
   public:

src/chmod.cpp

@@ -1,37 +1,31 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <fuse.h>
 
-#include <errno.h>
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
-#include "assert.hpp"
+#include "errno.hpp"
+#include "fs_base_chmod.hpp"
+#include "fs_path.hpp"
+#include "rv.hpp"
+#include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
@@ -39,49 +33,72 @@ using mergerfs::Policy;
 
 static
 int
-_chmod(const fs::SearchFunc  searchFunc,
+_chmod_loop_core(const string *basepath,
+                 const char   *fusepath,
+                 const mode_t  mode,
+                 const int     error)
+{
+  int rv;
+  string fullpath;
+
+  fs::path::make(basepath,fusepath,fullpath);
+
+  rv = fs::chmod(fullpath,mode);
+
+  return calc_error(rv,error,errno);
+}
+
+static
+int
+_chmod_loop(const vector<const string*> &basepaths,
+            const char                  *fusepath,
+            const mode_t                 mode)
+{
+  int error;
+
+  error = -1;
+  for(size_t i = 0, ei = basepaths.size(); i != ei; i++)
+    {
+      error = _chmod_loop_core(basepaths[i],fusepath,mode,error);
+    }
+
+  return -error;
+}
+
+static
+int
+_chmod(Policy::Func::Action  actionFunc,
        const vector<string> &srcmounts,
-       const string          fusepath,
+       const uint64_t        minfreespace,
+       const char           *fusepath,
        const mode_t          mode)
 {
   int rv;
-  int error;
-  fs::PathVector paths;
+  vector<const string*> basepaths;
 
-  searchFunc(srcmounts,fusepath,paths);
-  if(paths.empty())
-    return -ENOENT;
+  rv = actionFunc(srcmounts,fusepath,minfreespace,basepaths);
+  if(rv == -1)
+    return -errno;
 
-  rv    = -1;
-  error =  0;
-  for(fs::PathVector::const_iterator
-        i = paths.begin(), ei = paths.end(); i != ei; ++i)
-    {
-      rv &= ::chmod(i->full.c_str(),mode);
-      if(rv == -1)
-        error = errno;
-    }
-
-  return ((rv == -1) ? -error : 0);
+  return _chmod_loop(basepaths,fusepath,mode);
 }
 
 namespace mergerfs
 {
-  namespace chmod
+  namespace fuse
   {
     int
     chmod(const char *fusepath,
           mode_t      mode)
     {
-      const struct fuse_context *fc     = fuse_get_context();
-      const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
-      const config::Config      &config = config::get();
+      const fuse_context      *fc     = fuse_get_context();
+      const Config            &config = Config::get(fc);
+      const ugid::Set          ugid(fc->uid,fc->gid);
+      const rwlock::ReadGuard  readlock(&config.srcmountslock);
 
-      if(fusepath == config.controlfile)
-        return -EPERM;
-
-      return _chmod(*config.action,
+      return _chmod(config.chmod,
                     config.srcmounts,
+                    config.minfreespace,
                     fusepath,
                     mode);
     }

src/chmod.hpp

@@ -1,30 +1,22 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 namespace mergerfs
 {
-  namespace chmod
+  namespace fuse
   {
     int
     chmod(const char *fusepath,

src/chown.cpp

@@ -1,90 +1,109 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <fuse.h>
 
-#include <errno.h>
-
 #include <string>
 #include <vector>
 
-#include "ugid.hpp"
-#include "fs.hpp"
 #include "config.hpp"
-#include "assert.hpp"
+#include "errno.hpp"
+#include "fs_base_chown.hpp"
+#include "fs_path.hpp"
+#include "rv.hpp"
+#include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
 using mergerfs::Policy;
+using mergerfs::Config;
 
 static
 int
-_chown(const fs::SearchFunc  searchFunc,
+_chown_loop_core(const string *basepath,
+                 const char   *fusepath,
+                 const uid_t   uid,
+                 const gid_t   gid,
+                 const int     error)
+{
+  int rv;
+  string fullpath;
+
+  fs::path::make(basepath,fusepath,fullpath);
+
+  rv = fs::lchown(fullpath,uid,gid);
+
+  return calc_error(rv,error,errno);
+}
+
+static
+int
+_chown_loop(const vector<const string*> &basepaths,
+            const char                  *fusepath,
+            const uid_t                  uid,
+            const gid_t                  gid)
+{
+  int error;
+
+  error = -1;
+  for(size_t i = 0, ei = basepaths.size(); i != ei; i++)
+    {
+      error = _chown_loop_core(basepaths[i],fusepath,uid,gid,error);
+    }
+
+  return -error;
+}
+
+static
+int
+_chown(Policy::Func::Action  actionFunc,
        const vector<string> &srcmounts,
-       const string          fusepath,
+       const uint64_t        minfreespace,
+       const char           *fusepath,
        const uid_t           uid,
        const gid_t           gid)
 {
   int rv;
-  int error;
-  fs::PathVector paths;
+  vector<const string*> basepaths;
 
-  searchFunc(srcmounts,fusepath,paths);
-  if(paths.empty())
-    return -ENOENT;
+  rv = actionFunc(srcmounts,fusepath,minfreespace,basepaths);
+  if(rv == -1)
+    return -errno;
 
-  rv    = -1;
-  error =  0;
-  for(fs::PathVector::const_iterator
-        i = paths.begin(), ei = paths.end(); i != ei; ++i)
-    {
-      rv &= ::lchown(i->full.c_str(),uid,gid);
-      if(rv == -1)
-        error = errno;
-    }
-
-  return ((rv == -1) ? -error : 0);
+  return _chown_loop(basepaths,fusepath,uid,gid);
 }
 
 namespace mergerfs
 {
-  namespace chown
+  namespace fuse
   {
     int
     chown(const char *fusepath,
           uid_t       uid,
           gid_t       gid)
     {
-      const struct fuse_context *fc     = fuse_get_context();
-      const config::Config      &config = config::get();
-      const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
+      const fuse_context      *fc     = fuse_get_context();
+      const Config            &config = Config::get(fc);
+      const ugid::Set          ugid(fc->uid,fc->gid);
+      const rwlock::ReadGuard  readlock(&config.srcmountslock);
 
-      if(fusepath == config.controlfile)
-        return -EPERM;
-
-      return _chown(*config.action,
+      return _chown(config.chown,
                     config.srcmounts,
+                    config.minfreespace,
                     fusepath,
                     uid,
                     gid);

src/chown.hpp

@@ -1,30 +1,22 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 namespace mergerfs
 {
-  namespace chown
+  namespace fuse
   {
     int
     chown(const char *fusepath,

src/clone.cpp

@@ -0,0 +1,61 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <unistd.h>
+#include <string.h>
+
+#include <iostream>
+
+#include "errno.hpp"
+#include "fs.hpp"
+#include "fs_clonefile.hpp"
+#include "fs_clonepath.hpp"
+
+namespace clonetool
+{
+  static
+  void
+  print_usage_and__exit(void)
+  {
+    std::cerr << "usage: clone "
+              << "[path <sourcedir> <destdir> <relativepath>]"
+              << " | "
+              << "[file <source> <dest>]"
+              << std::endl;
+    _exit(1);
+  }
+
+  int
+  main(const int    argc,
+       char * const argv[])
+  {
+    int rv = 0;
+
+    if(argc == 4 && !strcmp(argv[1],"file"))
+      rv = fs::clonefile(argv[2],argv[3]);
+    else if(argc == 5 && !strcmp(argv[1],"path"))
+      rv = fs::clonepath(argv[2],argv[3],argv[4]);
+    else
+      print_usage_and__exit();
+
+    if(rv == -1)
+      std::cerr << "error: "
+                << strerror(errno)
+                << std::endl;
+
+    return 0;
+  }
+}

src/clone.hpp

@@ -0,0 +1,22 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+namespace clonetool
+{
+  int
+  main(const int     argc,
+       char * const *argv);
+}

src/config.cpp

@@ -1,89 +1,114 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include <fuse.h>
-
-#include <sstream>
+#include <string>
+#include <vector>
 
 #include <unistd.h>
 #include <sys/stat.h>
 
 #include "config.hpp"
+#include "errno.hpp"
+#include "fs.hpp"
+#include "rwlock.hpp"
+
+#define MINFREESPACE_DEFAULT (4294967295ULL)
+#define POLICYINIT(X) X(policies[FuseFunc::Enum::X])
+
+using std::string;
+using std::vector;
 
 namespace mergerfs
 {
-  namespace config
+  Config::Config()
+    : destmount(),
+      srcmounts(),
+      srcmountslock(),
+      minfreespace(MINFREESPACE_DEFAULT),
+      moveonenospc(false),
+      POLICYINIT(access),
+      POLICYINIT(chmod),
+      POLICYINIT(chown),
+      POLICYINIT(create),
+      POLICYINIT(getattr),
+      POLICYINIT(getxattr),
+      POLICYINIT(link),
+      POLICYINIT(listxattr),
+      POLICYINIT(mkdir),
+      POLICYINIT(mknod),
+      POLICYINIT(open),
+      POLICYINIT(readlink),
+      POLICYINIT(removexattr),
+      POLICYINIT(rename),
+      POLICYINIT(rmdir),
+      POLICYINIT(setxattr),
+      POLICYINIT(symlink),
+      POLICYINIT(truncate),
+      POLICYINIT(unlink),
+      POLICYINIT(utimens),
+      controlfile("/.mergerfs")
   {
-    Config::Config()
-      : action(policies[0]),
-        create(policies[1]),
-        search(policies[2]),
-        controlfile("/.mergerfs")
-    {
-      action = &Policy::ff;
-      create = &Policy::epmfs;
-      search = &Policy::ff;
+    pthread_rwlock_init(&srcmountslock,NULL);
 
-      time_t now = time(NULL);
+    set_category_policy("action","all");
+    set_category_policy("create","epmfs");
+    set_category_policy("search","ff");
+  }
 
-      controlfilestat.st_dev     = 0;
-      controlfilestat.st_ino     = 0;
-      controlfilestat.st_mode    = (S_IFREG|S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
-      controlfilestat.st_nlink   = 1;
-      controlfilestat.st_uid     = ::getuid();
-      controlfilestat.st_gid     = ::getgid();
-      controlfilestat.st_rdev    = 0;
-      controlfilestat.st_size    = 0;
-      controlfilestat.st_blksize = 1024;
-      controlfilestat.st_blocks  = 0;
-      controlfilestat.st_atime   = now;
-      controlfilestat.st_mtime   = now;
-      controlfilestat.st_ctime   = now;
-    }
+  int
+  Config::set_func_policy(const string &fusefunc_,
+                          const string &policy_)
+  {
+    const Policy   *policy;
+    const FuseFunc *fusefunc;
 
-    std::string
-    Config::controlfiledata() const
-    {
-      std::stringstream ss;
+    fusefunc = FuseFunc::find(fusefunc_);
+    if(fusefunc == FuseFunc::invalid)
+      return (errno=ENODATA,-1);
 
-      ss << "action=" << (std::string)*action << std::endl
-         << "create=" << (std::string)*create << std::endl
-         << "search=" << (std::string)*search << std::endl;
+    policy = Policy::find(policy_);
+    if(policy == Policy::invalid)
+      return (errno=EINVAL,-1);
 
-      return ss.str();
-    }
+    policies[(FuseFunc::Enum::Type)*fusefunc] = policy;
 
-    const Config&
-    get(void)
-    {
-      return (*((Config*)fuse_get_context()->private_data));
-    }
+    return 0;
+  }
 
-    Config&
-    get_writable(void)
-    {
-      return (*((Config*)fuse_get_context()->private_data));
-    }
+  int
+  Config::set_category_policy(const string &category_,
+                              const string &policy_)
+  {
+    const Policy   *policy;
+    const Category *category;
+
+    category = Category::find(category_);
+    if(category == Category::invalid)
+      return (errno=ENODATA,-1);
+
+    policy = Policy::find(policy_);
+    if(policy == Policy::invalid)
+      return (errno=EINVAL,-1);
+
+    for(int i = 0; i < FuseFunc::Enum::END; i++)
+      {
+        if(FuseFunc::fusefuncs[i] == (Category::Enum::Type)*category)
+          policies[(FuseFunc::Enum::Type)FuseFunc::fusefuncs[i]] = policy;
+      }
+
+    return 0;
   }
 }

src/config.hpp

@@ -1,67 +1,94 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #ifndef __CONFIG_HPP__
 #define __CONFIG_HPP__
 
+#include <fuse.h>
+
 #include <sys/stat.h>
+#include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "policy.hpp"
-#include "category.hpp"
+#include "fusefunc.hpp"
 
 namespace mergerfs
 {
-  namespace config
+  class Config
   {
-    class Config
+  public:
+    Config();
+
+  public:
+    int set_func_policy(const std::string &fusefunc_,
+                        const std::string &policy_);
+    int set_category_policy(const std::string &category,
+                            const std::string &policy);
+
+  public:
+    std::string              destmount;
+    std::vector<std::string> srcmounts;
+    mutable pthread_rwlock_t srcmountslock;
+    uint64_t                 minfreespace;
+    bool                     moveonenospc;
+
+  public:
+    const Policy  *policies[FuseFunc::Enum::END];
+    const Policy *&access;
+    const Policy *&chmod;
+    const Policy *&chown;
+    const Policy *&create;
+    const Policy *&getattr;
+    const Policy *&getxattr;
+    const Policy *&link;
+    const Policy *&listxattr;
+    const Policy *&mkdir;
+    const Policy *&mknod;
+    const Policy *&open;
+    const Policy *&readlink;
+    const Policy *&removexattr;
+    const Policy *&rename;
+    const Policy *&rmdir;
+    const Policy *&setxattr;
+    const Policy *&symlink;
+    const Policy *&truncate;
+    const Policy *&unlink;
+    const Policy *&utimens;
+
+  public:
+    const std::string controlfile;
+
+  public:
+    static
+    const Config &
+    get(const fuse_context *fc)
     {
-    public:
-      Config();
+      return *((Config*)fc->private_data);
+    }
 
-    public:
-      std::string controlfiledata() const;
-
-    public:
-      std::string              destmount;
-      std::vector<std::string> srcmounts;
-
-      const Policy *policies[Category::Enum::END];
-      const Policy *&action;
-      const Policy *&create;
-      const Policy *&search;
-
-    public:
-      const std::string controlfile;
-      struct stat       controlfilestat;
-    };
-
-    const Config &get(void);
-    Config       &get_writable(void);
-  }
+    static
+    Config &
+    get_writable(void)
+    {
+      return (*((Config*)fuse_get_context()->private_data));
+    }
+  };
 }
 
 #endif

src/create.cpp

@@ -1,119 +1,125 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <fuse.h>
 
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <errno.h>
-
 #include <string>
 #include <vector>
 
 #include "config.hpp"
-#include "ugid.hpp"
+#include "errno.hpp"
 #include "fileinfo.hpp"
-#include "fs.hpp"
-#include "assert.hpp"
+#include "fs_base_open.hpp"
+#include "fs_clonepath.hpp"
+#include "fs_path.hpp"
+#include "rwlock.hpp"
+#include "ugid.hpp"
 
 using std::string;
 using std::vector;
-using mergerfs::FileInfo;
 using mergerfs::Policy;
+using namespace mergerfs;
 
 static
 int
-_create_controlfile(uint64_t &fh)
+_create_core(const string &existingpath,
+             const string &createpath,
+             const char   *fusepath,
+             const char   *fusedirpath,
+             const mode_t  mode,
+             const int     flags,
+             uint64_t     &fh)
 {
-  fh = (uint64_t)new string;
+  int fd;
+  string fullpath;
+
+  if(createpath != existingpath)
+    {
+      const ugid::SetRootGuard ugidGuard;
+      fs::clonepath(existingpath,createpath,fusedirpath);
+    }
+
+  fs::path::make(&createpath,fusepath,fullpath);
+
+  fd = fs::open(fullpath,flags,mode);
+  if(fd == -1)
+    return -errno;
+
+  fh = reinterpret_cast<uint64_t>(new FileInfo(fd));
 
   return 0;
 }
 
 static
 int
-_create(const fs::SearchFunc  searchFunc,
-        const fs::SearchFunc  createPathFunc,
+_create(Policy::Func::Search  searchFunc,
+        Policy::Func::Create  createFunc,
         const vector<string> &srcmounts,
-        const string          fusepath,
+        const uint64_t        minfreespace,
+        const char           *fusepath,
         const mode_t          mode,
         const int             flags,
         uint64_t             &fh)
 {
-  int fd;
-  string path;
-  string dirname;
-  fs::PathVector createpath;
-  fs::PathVector existingpath;
+  int rv;
+  string fullpath;
+  string fusedirpath;
+  const char *fusedirpathcstr;
+  vector<const string*> createpaths;
+  vector<const string*> existingpaths;
 
-  dirname      = fs::dirname(fusepath);
-  searchFunc(srcmounts,dirname,existingpath);
-  if(existingpath.empty())
-    return -ENOENT;
+  fusedirpath = fusepath;
+  fs::path::dirname(fusedirpath);
+  fusedirpathcstr = fusedirpath.c_str();
 
-  createPathFunc(srcmounts,dirname,createpath);
-  if(createpath.empty())
-    return -ENOSPC;
-
-  if(createpath[0].base != existingpath[0].base)
-    fs::clonepath(existingpath[0].base,createpath[0].base,dirname);
-
-  path = fs::make_path(createpath[0].base,fusepath);
-
-  fd = ::open(path.c_str(),flags,mode);
-  if(fd == -1)
+  rv = searchFunc(srcmounts,fusedirpathcstr,minfreespace,existingpaths);
+  if(rv == -1)
     return -errno;
 
-  fh = (uint64_t)new FileInfo(fd,flags,path);
+  rv = createFunc(srcmounts,fusedirpathcstr,minfreespace,createpaths);
+  if(rv == -1)
+    return -errno;
 
-  return 0;
+  return _create_core(*existingpaths[0],*createpaths[0],
+                      fusepath,fusedirpathcstr,
+                      mode,flags,fh);
 }
 
 namespace mergerfs
 {
-  namespace create
+  namespace fuse
   {
     int
-    create(const char            *fusepath,
-           mode_t                 mode,
-           struct fuse_file_info *fileinfo)
+    create(const char     *fusepath,
+           mode_t          mode,
+           fuse_file_info *ffi)
     {
-      const struct fuse_context *fc     = fuse_get_context();
-      const config::Config      &config = config::get();
-      const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
+      const fuse_context      *fc     = fuse_get_context();
+      const Config            &config = Config::get(fc);
+      const ugid::Set          ugid(fc->uid,fc->gid);
+      const rwlock::ReadGuard  readlock(&config.srcmountslock);
 
-      if(fusepath == config.controlfile)
-        return _create_controlfile(fileinfo->fh);
-
-      return _create(*config.search,
-                     *config.create,
+      return _create(config.getattr,
+                     config.create,
                      config.srcmounts,
+                     config.minfreespace,
                      fusepath,
                      (mode & ~fc->umask),
-                     fileinfo->flags,
-                     fileinfo->fh);
+                     ffi->flags,
+                     ffi->fh);
     }
   }
 }

src/create.hpp

@@ -1,37 +1,30 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include <sys/types.h>
 #include <fuse.h>
 
+#include <sys/types.h>
+
 namespace mergerfs
 {
-  namespace create
+  namespace fuse
   {
     int
-    create(const char            *fusepath,
-           mode_t                 mode,
-           struct fuse_file_info *fileinfo);
+    create(const char     *fusepath,
+           mode_t          mode,
+           fuse_file_info *ffi);
   }
 }

src/destroy.cpp

@@ -0,0 +1,27 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+namespace mergerfs
+{
+  namespace fuse
+  {
+    void
+    destroy(void *)
+    {
+
+    }
+  }
+}

src/destroy.hpp

@@ -0,0 +1,24 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+namespace mergerfs
+{
+  namespace fuse
+  {
+    void
+    destroy(void *);
+  }
+}

src/errno.hpp

@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <errno.h>
+
+#if defined(ENODATA) && !defined(ENOATTR)
+#define ENOATTR ENODATA
+#endif
+
+#if defined(ENOATTR) && !defined(ENODATA)
+#define ENODATA ENOATTR
+#endif
+
+#if !defined(ENOATTR) && !defined(ENODATA)
+#error "Neither ENOATTR or ENODATA defined: please contact mergerfs author with platform information"
+#endif

src/fallocate.cpp

@@ -1,40 +1,26 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
+#if FALLOCATE
 
 #include <fuse.h>
 
-#include <errno.h>
-#include <fcntl.h>
-
-#include "config.hpp"
+#include "errno.hpp"
 #include "fileinfo.hpp"
-
-using namespace mergerfs;
+#include "fs_fallocate.hpp"
 
 static
 int
@@ -45,47 +31,30 @@ _fallocate(const int   fd,
 {
   int rv;
 
-#ifdef _GNU_SOURCE
-  rv = ::fallocate(fd,mode,offset,len);
-#elif defined _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
-  if(mode)
-    {
-      rv = -1;
-      errno = EOPNOTSUPP;
-    }
-  else
-    {
-      rv = ::posix_fallocate(fd,offset,len);
-    }
-#else
-  rv = -1;
-  errno = EOPNOTSUPP;
-#endif
+  rv = fs::fallocate(fd,mode,offset,len);
 
   return ((rv == -1) ? -errno : 0);
 }
 
 namespace mergerfs
 {
-  namespace fallocate
+  namespace fuse
   {
     int
-    fallocate(const char            *fusepath,
-              int                    mode,
-              off_t                  offset,
-              off_t                  len,
-              struct fuse_file_info *fi)
+    fallocate(const char     *fusepath,
+              int             mode,
+              off_t           offset,
+              off_t           len,
+              fuse_file_info *ffi)
     {
-      const config::Config &config   = config::get();
-      const FileInfo       *fileinfo = (FileInfo*)fi->fh;
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
 
-      if(fusepath == config.controlfile)
-        return -EINVAL;
-
-      return _fallocate(fileinfo->fd,
+      return _fallocate(fi->fd,
                         mode,
                         offset,
                         len);
     }
   }
 }
+
+#endif

src/fallocate.hpp

@@ -1,36 +1,28 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 namespace mergerfs
 {
-  namespace fallocate
+  namespace fuse
   {
     int
-    fallocate(const char            *fusepath,
-              int                    mode,
-              off_t                  offset,
-              off_t                  len,
-              struct fuse_file_info *fi);
+    fallocate(const char     *fusepath,
+              int             mode,
+              off_t           offset,
+              off_t           len,
+              fuse_file_info *fi);
   }
 }

src/fgetattr.cpp

@@ -1,48 +1,24 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <fuse.h>
 
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include "config.hpp"
+#include "errno.hpp"
 #include "fileinfo.hpp"
-
-static
-int
-_fgetattr_controlfile(const struct stat &controlfilestat,
-                      const std::string  cfdata,
-                      struct stat       &st)
-{
-  st = controlfilestat;
-  st.st_size = cfdata.size();
-
-  return 0;
-}
+#include "fs_base_stat.hpp"
 
 static
 int
@@ -51,29 +27,23 @@ _fgetattr(const int    fd,
 {
   int rv;
 
-  rv = ::fstat(fd,&st);
+  rv = fs::fstat(fd,st);
 
   return ((rv == -1) ? -errno : 0);
 }
 
 namespace mergerfs
 {
-  namespace fgetattr
+  namespace fuse
   {
     int
-    fgetattr(const char            *fusepath,
-             struct stat           *st,
-             struct fuse_file_info *ffi)
+    fgetattr(const char     *fusepath,
+             struct stat    *st,
+             fuse_file_info *ffi)
     {
-      const config::Config &config   = config::get();
-      const FileInfo       *fileinfo = (FileInfo*)ffi->fh;
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
 
-      if(fusepath == config.controlfile)
-        return _fgetattr_controlfile(config.controlfilestat,
-                                     config.controlfiledata(),
-                                     *st);
-
-      return _fgetattr(fileinfo->fd,
+      return _fgetattr(fi->fd,
                        *st);
     }
   }

src/fgetattr.hpp

@@ -1,38 +1,30 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <unistd.h>
 
 namespace mergerfs
 {
-  namespace fgetattr
+  namespace fuse
   {
     int
-    fgetattr(const char            *fusepath,
-             struct stat           *st,
-             struct fuse_file_info *fileinfo);
+    fgetattr(const char     *fusepath,
+             struct stat    *st,
+             fuse_file_info *fileinfo);
   }
 }

src/fileinfo.hpp

@@ -1,53 +1,32 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#ifndef __FILEINFO_H__
-#define __FILEINFO_H__
+#ifndef __FILEINFO_HPP__
+#define __FILEINFO_HPP__
 
-#include <string>
-
-namespace mergerfs
+class FileInfo
 {
-  struct FileInfo
+public:
+  FileInfo(int _fd) :
+    fd(_fd)
   {
-  public:
-    FileInfo(int         fd_,
-             int         flags_,
-             std::string realpath_) :
-      fd(fd_),
-      flags(flags_),
-      realpath(realpath_)
-    {
-    }
+  }
 
-    int         fd;
-    int         flags;
-    std::string realpath;
+public:
+  int fd;
+};
 
-  private:
-    FileInfo() {}
-  };
-}
-
-#endif /* __FILEINFO_H__ */
+#endif

src/flock.cpp

@@ -0,0 +1,49 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fuse.h>
+
+#include "errno.hpp"
+#include "fileinfo.hpp"
+#include "fs_base_flock.hpp"
+
+static
+int
+_flock(const int fd,
+       const int operation)
+{
+  int rv;
+
+  rv = fs::flock(fd,operation);
+
+  return ((rv == -1) ? -errno : 0);
+}
+
+namespace mergerfs
+{
+  namespace fuse
+  {
+    int
+    flock(const char     *fusepath,
+          fuse_file_info *ffi,
+          int             op)
+    {
+      FileInfo* fi = reinterpret_cast<FileInfo*>(ffi->fh);
+
+      return _flock(fi->fd,op);
+    }
+  }
+}

src/flock.hpp

@@ -0,0 +1,26 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+namespace mergerfs
+{
+  namespace fuse
+  {
+    int
+    flock(const char     *fusepath,
+          fuse_file_info *ffi,
+          int             op);
+  }
+}

src/flush.cpp

@@ -1,34 +1,25 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <fuse.h>
 
-#include <unistd.h>
-#include <errno.h>
-
-#include "config.hpp"
+#include "errno.hpp"
 #include "fileinfo.hpp"
+#include "fs_base_close.hpp"
+#include "fs_base_dup.hpp"
 
 static
 int
@@ -36,29 +27,26 @@ _flush(const int fd)
 {
   int rv;
 
-  rv = dup(fd);
+  rv = fs::dup(fd);
   if(rv == -1)
     errno = EIO;
   else
-    rv = close(rv);
+    rv = fs::close(rv);
 
   return ((rv == -1) ? -errno : 0);
 }
 
 namespace mergerfs
 {
-  namespace flush
+  namespace fuse
   {
     int
-    flush(const char            *fusepath,
-          struct fuse_file_info *fi)
+    flush(const char     *fusepath,
+          fuse_file_info *ffi)
     {
-      const config::Config &config = config::get();
+      FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
 
-      if(fusepath == config.controlfile)
-        return 0;
-
-      return _flush(((FileInfo*)fi->fh)->fd);
+      return _flush(fi->fd);
     }
   }
 }

src/flush.hpp

@@ -1,33 +1,25 @@
 /*
-   The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-   Permission is hereby granted, free of charge, to any person obtaining a copy
-   of this software and associated documentation files (the "Software"), to deal
-   in the Software without restriction, including without limitation the rights
-   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-   copies of the Software, and to permit persons to whom the Software is
-   furnished to do so, subject to the following conditions:
-
-   The above copyright notice and this permission notice shall be included in
-   all copies or substantial portions of the Software.
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-   THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 namespace mergerfs
 {
-  namespace flush
+  namespace fuse
   {
     int
-    flush(const char            *path,
-          struct fuse_file_info *fi);
+    flush(const char     *path,
+          fuse_file_info *fi);
   }
 }

src/fs.cpp

@@ -1,697 +1,255 @@
 /*
-  The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-  Permission is hereby granted, free of charge, to any person obtaining a copy
-  of this software and associated documentation files (the "Software"), to deal
-  in the Software without restriction, including without limitation the rights
-  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-  copies of the Software, and to permit persons to whom the Software is
-  furnished to do so, subject to the following conditions:
-
-  The above copyright notice and this permission notice shall be included in
-  all copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-  THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #include <string>
 #include <vector>
-#include <map>
-#include <sstream>
-#include <cstdlib>
-#include <iterator>
 
-#include <dirent.h>
-#include <errno.h>
 #include <fcntl.h>
-#include <linux/fs.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <sys/statvfs.h>
-#include <sys/types.h>
-#include <unistd.h>
+#include <glob.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdlib.h>
 
-#include "fs.hpp"
-#include "xattr.hpp"
+#include "errno.hpp"
+#include "fs_attr.hpp"
+#include "fs_base_realpath.hpp"
+#include "fs_base_stat.hpp"
+#include "fs_base_statvfs.hpp"
+#include "fs_path.hpp"
+#include "fs_xattr.hpp"
+#include "statvfs_util.hpp"
+#include "str.hpp"
+#include "success_fail.hpp"
 
 using std::string;
 using std::vector;
-using std::map;
-using std::istringstream;
-
-template<typename Container>
-Container&
-split(Container                                  &result,
-      const typename Container::value_type       &s,
-      typename Container::value_type::value_type  delimiter)
-{
-  string        str;
-  istringstream ss(s);
-
-  while(std::getline(ss,str,delimiter))
-    result.push_back(str);
-
-  return result;
-}
-
-template <typename Iter>
-Iter
-random_element(Iter begin,
-               Iter end)
-{
-  const unsigned long n = std::distance(begin, end);
-
-  std::advance(begin, (std::rand() % n));
-
-  return begin;
-}
 
 namespace fs
 {
-  string
-  dirname(const string path)
+  bool
+  exists(const string &path,
+         struct stat  &st)
   {
-    string parent = path;
-    string::reverse_iterator i;
-    string::reverse_iterator bi;
+    int rv;
 
-    bi = parent.rend();
-    i  = parent.rbegin();
-    while(*i == '/' && i != bi)
-      i++;
+    rv = fs::lstat(path,st);
 
-    while(*i != '/' && i != bi)
-      i++;
-
-    while(*i == '/' && i != bi)
-      i++;
-
-    parent.erase(i.base(),parent.end());
-
-    return parent;
-  }
-
-  string
-  basename(const string path)
-  {
-    return path.substr(path.find_last_of('/')+1);
+    return LSTAT_SUCCEEDED(rv);
   }
 
   bool
-  dir_is_empty(const string path)
+  exists(const string &path)
   {
-    DIR           *dir;
-    struct dirent *de;
+    struct stat st;
 
-    dir = ::opendir(path.c_str());
-    if(!dir)
-      return false;
+    return exists(path,st);
+  }
 
-    while((de = ::readdir(dir)))
+  bool
+  info(const string &path,
+       bool         &readonly,
+       uint64_t     &spaceavail,
+       uint64_t     &spaceused)
+  {
+    int rv;
+    struct statvfs st;
+
+    rv = fs::statvfs(path,st);
+    if(STATVFS_SUCCEEDED(rv))
       {
-        const char *d_name = de->d_name;
+        readonly   = StatVFS::readonly(st);
+        spaceavail = StatVFS::spaceavail(st);
+        spaceused  = StatVFS::spaceused(st);
+      }
 
-        if(d_name[0] == '.'     &&
-           ((d_name[1] == '\0') ||
-            (d_name[1] == '.' && d_name[2] == '\0')))
+    return STATVFS_SUCCEEDED(rv);
+  }
+
+  bool
+  readonly(const string &path)
+  {
+    int rv;
+    struct statvfs st;
+
+    rv = fs::statvfs(path,st);
+
+    return (STATVFS_SUCCEEDED(rv) && StatVFS::readonly(st));
+  }
+
+  bool
+  spaceavail(const string &path,
+             uint64_t       &spaceavail)
+  {
+    int rv;
+    struct statvfs st;
+
+    rv = fs::statvfs(path,st);
+    if(STATVFS_SUCCEEDED(rv))
+      spaceavail = StatVFS::spaceavail(st);
+
+    return STATVFS_SUCCEEDED(rv);
+  }
+
+  bool
+  spaceused(const string &path,
+            uint64_t     &spaceused)
+  {
+    int rv;
+    struct statvfs st;
+
+    rv = fs::statvfs(path,st);
+    if(STATVFS_SUCCEEDED(rv))
+      spaceused = StatVFS::spaceused(st);
+
+    return STATVFS_SUCCEEDED(rv);
+  }
+
+  void
+  findallfiles(const vector<string> &srcmounts,
+               const char           *fusepath,
+               vector<string>       &paths)
+  {
+    string fullpath;
+
+    for(size_t i = 0, ei = srcmounts.size(); i != ei; i++)
+      {
+        fs::path::make(&srcmounts[i],fusepath,fullpath);
+
+        if(!fs::exists(fullpath))
           continue;
 
-        ::closedir(dir);
-
-        return false;
+        paths.push_back(fullpath);
       }
-
-    ::closedir(dir);
-
-    return true;
-  }
-
-  string
-  make_path(const string base,
-            const string suffix)
-  {
-    if(suffix[0]      == '/' ||
-       *base.rbegin() == '/')
-      return base + suffix;
-    return base + '/' + suffix;
-  }
-
-  bool
-  path_exists(vector<string>::const_iterator begin,
-              vector<string>::const_iterator end,
-              const string                   fusepath)
-  {
-    for(vector<string>::const_iterator
-          iter = begin; iter != end; ++iter)
-      {
-        int         rv;
-        string      path;
-
-        path = fs::make_path(*iter,fusepath);
-        rv   = ::eaccess(path.c_str(),F_OK);
-        if(rv == 0)
-          return true;
-      }
-
-    return false;
-  }
-
-  bool
-  path_exists(const vector<string> &srcmounts,
-              const string               fusepath)
-  {
-    return path_exists(srcmounts.begin(),
-                       srcmounts.end(),
-                       fusepath);
   }
 
   int
-  listxattr(const string  path,
-            vector<char> &attrs)
-  {
-#ifndef WITHOUT_XATTR
-    int rv;
-    int size;
-
-    rv    = -1;
-    errno = ERANGE;
-    while(rv == -1 && errno == ERANGE)
-      {
-        size = ::listxattr(path.c_str(),NULL,0);
-        attrs.resize(size);
-        rv   = ::listxattr(path.c_str(),&attrs[0],size);
-      }
-
-    return rv;
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  listxattr(const string         path,
-            vector<string> &attrvector)
+  findonfs(const vector<string> &srcmounts,
+           const char           *fusepath,
+           const int             fd,
+           string               &basepath)
   {
     int rv;
-    vector<char> attrs;
+    dev_t dev;
+    string fullpath;
+    struct stat st;
 
-    rv = listxattr(path,attrs);
-    if(rv != -1)
-      {
-        string tmp(attrs.begin(),attrs.end());
-        split(attrvector,tmp,'\0');
-      }
-
-    return rv;
-  }
-
-  int
-  listxattr(const string  path,
-            string &attrstr)
-  {
-    int rv;
-    vector<char> attrs;
-
-    rv = listxattr(path,attrs);
-    if(rv != -1)
-      attrstr = string(attrs.begin(),attrs.end());
-
-    return rv;
-  }
-
-  int
-  getxattr(const string  path,
-           const string  attr,
-           vector<char> &value)
-  {
-#ifndef WITHOUT_XATTR
-    int rv;
-    int size;
-
-    rv    = -1;
-    errno = ERANGE;
-    while(rv == -1 && errno == ERANGE)
-      {
-        size = ::getxattr(path.c_str(),attr.c_str(),NULL,0);
-        value.resize(size);
-        rv   = ::getxattr(path.c_str(),attr.c_str(),&value[0],size);
-      }
-
-    return rv;
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  getxattr(const string  path,
-           const string  attr,
-           string       &value)
-  {
-    int          rv;
-    vector<char> tmpvalue;
-
-    rv = getxattr(path,attr,tmpvalue);
-    if(rv != -1)
-      value = string(tmpvalue.begin(),tmpvalue.end());
-
-    return rv;
-  }
-
-
-  int
-  getxattrs(const string        path,
-            map<string,string> &attrs)
-  {
-    int rv;
-    string attrstr;
-
-    rv = listxattr(path,attrstr);
-    if(rv == -1)
+    rv = fs::fstat(fd,st);
+    if(FSTAT_FAILED(rv))
       return -1;
 
-    {
-      string key;
-      istringstream ss(attrstr);
+    dev = st.st_dev;
+    for(int i = 0, ei = srcmounts.size(); i != ei; i++)
+      {
+        fs::path::make(&srcmounts[i],fusepath,fullpath);
 
-      while(getline(ss,key,'\0'))
-        {
-          string value;
+        rv = fs::lstat(fullpath,st);
+        if(FSTAT_FAILED(rv))
+          continue;
 
-          rv = getxattr(path,key,value);
-          if(rv != -1)
-            attrs[key] = value;
-        }
-    }
+        if(st.st_dev != dev)
+          continue;
+
+        basepath = srcmounts[i];
+
+        return 0;
+      }
+
+    return (errno=ENOENT,-1);
+  }
+
+  void
+  glob(const vector<string> &patterns,
+       vector<string>       &strs)
+  {
+    int flags;
+    size_t veclen;
+    glob_t gbuf = {0};
+
+    veclen = patterns.size();
+    if(veclen == 0)
+      return;
+
+    flags = 0;
+    glob(patterns[0].c_str(),flags,NULL,&gbuf);
+
+    flags = GLOB_APPEND;
+    for(size_t i = 1; i < veclen; i++)
+      glob(patterns[i].c_str(),flags,NULL,&gbuf);
+
+    for(size_t i = 0; i < gbuf.gl_pathc; ++i)
+      strs.push_back(gbuf.gl_pathv[i]);
+
+    globfree(&gbuf);
+  }
+
+  void
+  realpathize(vector<string> &strs)
+  {
+    char *rv;
+
+    for(size_t i = 0; i < strs.size(); i++)
+      {
+        rv = fs::realpath(strs[i]);
+        if(rv == NULL)
+          continue;
+
+        strs[i] = rv;
+
+        ::free(rv);
+      }
+  }
+
+  int
+  getfl(const int fd)
+  {
+    return ::fcntl(fd,F_GETFL,0);
+  }
+
+  int
+  mfs(const vector<string> &basepaths,
+      const uint64_t        minfreespace,
+      string               &path)
+  {
+    fsblkcnt_t mfs;
+    const string *mfsbasepath;
+
+    mfs = 0;
+    mfsbasepath = NULL;
+    for(size_t i = 0, ei = basepaths.size(); i != ei; i++)
+      {
+        uint64_t spaceavail;
+        const string &basepath = basepaths[i];
+
+        if(!fs::spaceavail(basepath,spaceavail))
+          continue;
+
+        if(spaceavail < minfreespace)
+          continue;
+        if(spaceavail <= mfs)
+          continue;
+
+        mfs         = spaceavail;
+        mfsbasepath = &basepaths[i];
+      }
+
+    if(mfsbasepath == NULL)
+      return (errno=ENOENT,-1);
+
+    path = *mfsbasepath;
 
     return 0;
   }
-
-  int
-  setxattr(const string path,
-           const string key,
-           const string value,
-           const int    flags)
-  {
-#ifndef WITHOUT_XATTR
-    return ::setxattr(path.c_str(),
-                      key.c_str(),
-                      value.data(),
-                      value.size(),
-                      flags);
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  setxattr(const int    fd,
-           const string key,
-           const string value,
-           const int    flags)
-  {
-#ifndef WITHOUT_XATTR
-    return ::fsetxattr(fd,
-                       key.c_str(),
-                       value.data(),
-                       value.size(),
-                       flags);
-#else
-    errno = ENOTSUP;
-    return -1;
-#endif
-  }
-
-  int
-  setxattrs(const string              path,
-            const map<string,string> &attrs)
-  {
-    int fd;
-
-    fd = ::open(path.c_str(),O_RDONLY|O_NONBLOCK);
-    if(fd == -1)
-      return -1;
-
-    for(map<string,string>::const_iterator
-          i = attrs.begin(), ei = attrs.end(); i != ei; ++i)
-      {
-        setxattr(fd,i->first,i->second,0);
-      }
-
-    return ::close(fd);
-  }
-
-  int
-  copyxattrs(const string from,
-             const string to)
-  {
-    int rv;
-    map<string,string> attrs;
-
-    rv = getxattrs(from,attrs);
-    if(rv == -1)
-      return -1;
-
-    return setxattrs(to,attrs);
-  }
-
-  int
-  copyattr(const string from,
-           const string to)
-  {
-    int fd;
-    int rv;
-    int flags;
-    int error;
-    const int openflags = O_RDONLY|O_NONBLOCK;
-
-    fd = ::open(from.c_str(),openflags);
-    if(fd == -1)
-      return -1;
-
-    rv = ::ioctl(fd,FS_IOC_GETFLAGS,&flags);
-    if(rv == -1)
-      {
-        error = errno;
-        ::close(fd);
-        errno = error;
-        return -1;
-      }
-
-    fd = ::open(to.c_str(),openflags);
-    if(fd == -1)
-      return -1;
-
-    rv = ::ioctl(fd,FS_IOC_SETFLAGS,&flags);
-    if(rv == -1)
-      {
-        error = errno;
-        ::close(fd);
-        errno = error;
-        return -1;
-      }
-
-    return ::close(fd);
-  }
-
-  int
-  clonepath(const string fromsrc,
-            const string tosrc,
-            const string relative)
-  {
-    int         rv;
-    struct stat st;
-    string      topath;
-    string      frompath;
-    string      dirname;
-
-    dirname = fs::dirname(relative);
-    if(!dirname.empty())
-      {
-        rv = clonepath(fromsrc,tosrc,dirname);
-        if(rv == -1)
-          return -1;
-      }
-
-    frompath = fs::make_path(fromsrc,relative);
-
-    rv = ::stat(frompath.c_str(),&st);
-    if(rv == -1)
-      return -1;
-    else if(!S_ISDIR(st.st_mode))
-      return (errno = ENOTDIR,-1);
-
-    topath = fs::make_path(tosrc,relative);
-    rv = ::mkdir(topath.c_str(),st.st_mode);
-    if(rv == -1)
-      return -1;
-
-    rv = ::chown(topath.c_str(),st.st_uid,st.st_gid);
-    if(rv == -1)
-      return -1;
-
-    // It may not support it... it's fine...
-    rv = copyattr(frompath,topath);
-    if(rv == -1 && errno != ENOTTY)
-      return -1;
-
-    rv = copyxattrs(frompath,topath);
-    if(rv == -1 && errno != ENOTTY)
-      return -1;
-
-    return (errno = 0);
-  }
-
-  namespace find
-  {
-    void
-    invalid(const vector<string> &basepaths,
-            const string          fusepath,
-            PathVector           &paths)
-    {
-      return;
-    }
-
-    void
-    ff(const vector<string> &basepaths,
-       const string          fusepath,
-       PathVector           &paths)
-    {
-      for(vector<string>::const_iterator
-            iter = basepaths.begin(), eiter = basepaths.end();
-          iter != eiter;
-          ++iter)
-        {
-          int    rv;
-          string path;
-
-          path = fs::make_path(*iter,fusepath);
-          rv   = ::eaccess(path.c_str(),F_OK);
-          if(rv == 0)
-            {
-              paths.push_back(Path(*iter,path));
-              return;
-            }
-        }
-
-      return;
-    }
-
-    void
-    ffwp(const vector<string> &basepaths,
-         const string          fusepath,
-         PathVector           &paths)
-    {
-      Path fallback;
-
-      for(vector<string>::const_iterator
-            iter = basepaths.begin(), eiter = basepaths.end();
-          iter != eiter;
-          ++iter)
-        {
-          int         rv;
-          string      path;
-
-          path = fs::make_path(*iter,fusepath);
-
-          rv = ((::eaccess(path.c_str(),R_OK) == 0) ||
-                (::eaccess(path.c_str(),X_OK) == 0) ||
-                (::eaccess(path.c_str(),W_OK) == 0));
-
-          if(rv)
-            {
-              paths.push_back(Path(*iter,path));
-              return;
-            }
-          else if(errno == EACCES)
-            {
-              fallback.base = *iter;
-              fallback.full = path;
-            }
-        }
-
-      if(!fallback.base.empty())
-        paths.push_back(fallback);
-
-      return;
-    }
-
-    void
-    newest(const vector<string> &basepaths,
-           const string          fusepath,
-           PathVector           &paths)
-    {
-      time_t newest;
-      string npath;
-      vector<string>::const_iterator niter;
-
-      newest = 0;
-      for(vector<string>::const_iterator
-            iter = basepaths.begin(), eiter = basepaths.end();
-          iter != eiter;
-          ++iter)
-        {
-          int rv;
-          struct stat st;
-          const string path = fs::make_path(*iter,fusepath);
-
-          rv  = ::lstat(path.c_str(),&st);
-          if(rv == 0 && st.st_mtime > newest)
-            {
-              newest = st.st_mtime;
-              niter  = iter;
-              npath  = path;
-            }
-        }
-
-      if(newest)
-        paths.push_back(Path(*niter,npath));
-
-      return;
-    }
-
-    void
-    all(const vector<string> &basepaths,
-        const string          fusepath,
-        PathVector           &paths)
-    {
-      for(vector<string>::const_iterator
-            iter = basepaths.begin(), eiter = basepaths.end();
-          iter != eiter;
-          ++iter)
-        {
-          int    rv;
-          string path;
-
-          path = fs::make_path(*iter,fusepath);
-          rv   = ::eaccess(path.c_str(),F_OK);
-          if(rv == 0)
-            paths.push_back(Path(*iter,path));
-        }
-
-      return;
-    }
-
-    void
-    mfs(const vector<string> &basepaths,
-        const string          fusepath,
-        PathVector           &paths)
-    {
-      fsblkcnt_t mfs = 0;
-      string mfspath;
-      string fullmfspath;
-
-      for(vector<string>::const_iterator
-            iter = basepaths.begin(), eiter = basepaths.end();
-          iter != eiter;
-          ++iter)
-        {
-          int rv;
-          struct statvfs fsstats;
-          const string   mountpoint = *iter;
-
-          rv = ::statvfs(mountpoint.c_str(),&fsstats);
-          if(rv == 0)
-            {
-              fsblkcnt_t  spaceavail;
-
-              spaceavail = (fsstats.f_bsize * fsstats.f_bavail);
-              if(spaceavail > mfs)
-                {
-                  mfs     = spaceavail;
-                  mfspath = mountpoint;
-                }
-            }
-        }
-
-      fullmfspath = fs::make_path(mfspath,fusepath);
-
-      paths.push_back(Path(mfspath,fullmfspath));
-
-      return;
-    }
-
-    void
-    epmfs(const vector<string> &basepaths,
-          const string          fusepath,
-          PathVector           &paths)
-    {
-      fsblkcnt_t existingmfs = 0;
-      fsblkcnt_t generalmfs  = 0;
-      string     path;
-      string     generalmfspath;
-      string     existingmfspath;
-      vector<string>::const_iterator iter  = basepaths.begin();
-      vector<string>::const_iterator eiter = basepaths.end();
-
-      do
-        {
-          int rv;
-          struct statvfs fsstats;
-          const string   mountpoint = *iter;
-
-          rv = ::statvfs(mountpoint.c_str(),&fsstats);
-          if(rv == 0)
-            {
-              fsblkcnt_t  spaceavail;
-
-              spaceavail = (fsstats.f_bsize * fsstats.f_bavail);
-              if(spaceavail > generalmfs)
-                {
-                  generalmfs     = spaceavail;
-                  generalmfspath = mountpoint;
-                }
-
-              path = fs::make_path(mountpoint,fusepath);
-              rv = ::eaccess(path.c_str(),F_OK);
-              if(rv == 0)
-                {
-                  if(spaceavail > existingmfs)
-                    {
-                      existingmfs     = spaceavail;
-                      existingmfspath = mountpoint;
-                    }
-                }
-            }
-
-          ++iter;
-        }
-      while(iter != eiter);
-
-      if(existingmfspath.empty())
-        existingmfspath = generalmfspath;
-
-      paths.push_back(Path(existingmfspath,path));
-
-      return;
-    }
-
-    void
-    rand(const vector<string> &basepaths,
-         const string          fusepath,
-         PathVector           &paths)
-    {
-      string randombasepath;
-      string randomfullpath;
-
-      randombasepath = *random_element(basepaths.begin(),
-                                       basepaths.end());
-
-      randomfullpath = fs::make_path(randombasepath,
-                                     fusepath);
-
-      paths.push_back(Path(randombasepath,randomfullpath));
-    }
-  }
 };

src/fs.hpp

@@ -1,136 +1,68 @@
 /*
-  The MIT License (MIT)
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
 
-  Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
 
-  Permission is hereby granted, free of charge, to any person obtaining a copy
-  of this software and associated documentation files (the "Software"), to deal
-  in the Software without restriction, including without limitation the rights
-  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-  copies of the Software, and to permit persons to whom the Software is
-  furnished to do so, subject to the following conditions:
-
-  The above copyright notice and this permission notice shall be included in
-  all copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-  THE SOFTWARE.
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 #ifndef __FS_HPP__
 #define __FS_HPP__
 
+#include <stdint.h>
+
 #include <string>
 #include <vector>
-#include <map>
 
 namespace fs
 {
   using std::string;
   using std::vector;
-  using std::map;
 
-  struct Path
-  {
-    Path() {}
-    Path(const string b,
-         const string f)
-      : base(b),
-        full(f)
-    {}
+  bool exists(const string &path,
+              struct stat  &st);
+  bool exists(const string &path);
 
-    string base;
-    string full;
-  };
+  bool info(const string &path,
+            bool         &readonly,
+            uint64_t     &spaceavail,
+            uint64_t     &spaceused);
 
-  typedef vector<Path> PathVector;
-  typedef void (*SearchFunc)(const vector<string>&,const string,PathVector&);
+  bool readonly(const string &path);
 
-  string dirname(const string path);
-  string basename(const string path);
+  bool spaceavail(const string &path,
+                  uint64_t     &spaceavail);
 
-  bool dir_is_empty(const string path);
+  bool spaceused(const string &path,
+                 uint64_t     &spaceavail);
 
-  string make_path(const string base,
-                   const string suffix);
+  void findallfiles(const vector<string> &srcmounts,
+                    const char           *fusepath,
+                    vector<string>       &paths);
 
-  bool path_exists(vector<string>::const_iterator  begin,
-                   vector<string>::const_iterator  end,
-                   const string                    fusepath);
-  bool path_exists(const vector<string>           &srcmounts,
-                   const string                    fusepath);
+  int findonfs(const vector<string> &srcmounts,
+               const char           *fusepath,
+               const int             fd,
+               string               &basepath);
 
-  int clonepath(const string srcfrom,
-                const string srcto,
-                const string relative);
+  void glob(const vector<string> &patterns,
+            vector<string>       &strs);
 
-  int listxattr(const string    path,
-                vector<char>   &attrs);
-  int listxattr(const string    path,
-                string         &attrs);
-  int listxattr(const string    path,
-                vector<string> &attrs);
+  void realpathize(vector<string> &strs);
 
-  int getxattr(const string  path,
-               const string  attr,
-               vector<char> &value);
-  int getxattr(const string  path,
-               const string  attr,
-               string       &value);
+  int getfl(const int fd);
 
-  int getxattrs(const string        path,
-                map<string,string> &attrs);
-
-  int setxattr(const string path,
-               const string key,
-               const string value,
-               const int    flags);
-  int setxattr(const int    fd,
-               const string key,
-               const string value,
-               const int    flags);
-
-  int setxattrs(const string              path,
-                const map<string,string> &attrs);
-
-  int copyxattrs(const string from,
-                 const string to);
-
-  int copyattr(const string from,
-               const string to);
-
-  namespace find
-  {
-    void invalid(const vector<string> &basepaths,
-                 const string          fusepath,
-                 PathVector           &paths);
-    void ff(const vector<string>      &basepaths,
-            const string               fusepath,
-            PathVector                &paths);
-    void ffwp(const vector<string>    &paths,
-              const string             fusepath,
-              PathVector              &rv);
-    void newest(const vector<string>  &paths,
-                const string           fusepath,
-                PathVector            &rv);
-    void all(const vector<string>     &paths,
-             const string              fusepath,
-             PathVector               &rv);
-    void mfs(const vector<string>     &paths,
-             const string              fusepath,
-             PathVector               &rv);
-    void epmfs(const vector<string>   &paths,
-               const string            fusepath,
-               PathVector             &rv);
-    void rand(const vector<string>    &paths,
-              const string             fusepath,
-              PathVector              &rv);
-  }
+  int mfs(const vector<string> &srcs,
+          const uint64_t        minfreespace,
+          string               &path);
 };
 
 #endif // __FS_HPP__

src/fs_attr.cpp

@@ -0,0 +1,21 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifdef __linux__
+# include "fs_attr_linux.icpp"
+#else
+# include "fs_attr_unsupported.icpp"
+#endif

src/fs_attr.hpp

@@ -0,0 +1,35 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_ATTR_HPP__
+#define __FS_ATTR_HPP__
+
+#include <string>
+
+namespace fs
+{
+  namespace attr
+  {
+    using std::string;
+
+    int copy(const int fdin,
+             const int fdout);
+    int copy(const string &from,
+             const string &to);
+  }
+}
+
+#endif // __FS_ATTR_HPP__

src/fs_attr_linux.icpp

@@ -0,0 +1,127 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+#include <linux/fs.h>
+
+#include <string>
+
+#include "errno.hpp"
+#include "fs_base_close.hpp"
+#include "fs_base_open.hpp"
+#include "fs_base_ioctl.hpp"
+
+using std::string;
+
+namespace fs
+{
+  namespace attr
+  {
+    static
+    int
+    get_fs_ioc_flags(const int  fd,
+                     int       &flags)
+    {
+      return fs::ioctl(fd,FS_IOC_GETFLAGS,(void*)&flags);
+    }
+
+    static
+    int
+    get_fs_ioc_flags(const string &file,
+                     int          &flags)
+    {
+      int fd;
+      int rv;
+      const int openflags = O_RDONLY|O_NONBLOCK;
+
+      fd = fs::open(file,openflags);
+      if(fd == -1)
+        return -1;
+
+      rv = get_fs_ioc_flags(fd,flags);
+      if(rv == -1)
+        {
+          int error = errno;
+          fs::close(fd);
+          errno = error;
+          return -1;
+        }
+
+      return fs::close(fd);
+    }
+
+    static
+    int
+    set_fs_ioc_flags(const int fd,
+                     const int flags)
+    {
+      return fs::ioctl(fd,FS_IOC_SETFLAGS,(void*)&flags);
+    }
+
+    static
+    int
+    set_fs_ioc_flags(const string &file,
+                     const int     flags)
+    {
+      int fd;
+      int rv;
+      const int openflags = O_RDONLY|O_NONBLOCK;
+
+      fd = fs::open(file,openflags);
+      if(fd == -1)
+        return -1;
+
+      rv = set_fs_ioc_flags(fd,flags);
+      if(rv == -1)
+        {
+          int error = errno;
+          fs::close(fd);
+          errno = error;
+          return -1;
+        }
+
+      return fs::close(fd);
+    }
+
+    int
+    copy(const int fdin,
+         const int fdout)
+    {
+      int rv;
+      int flags;
+
+      rv = get_fs_ioc_flags(fdin,flags);
+      if(rv == -1)
+        return -1;
+
+      return set_fs_ioc_flags(fdout,flags);
+    }
+
+    int
+    copy(const string &from,
+         const string &to)
+    {
+      int rv;
+      int flags;
+
+      rv = get_fs_ioc_flags(from,flags);
+      if(rv == -1)
+        return -1;
+
+      return set_fs_ioc_flags(to,flags);
+    }
+  }
+}

src/fs_attr_unsupported.icpp

@@ -0,0 +1,39 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include "errno.hpp"
+
+namespace fs
+{
+  namespace attr
+  {
+    int
+    copy(const int fdin,
+         const int fdout)
+    {
+      return ENOTSUP;
+    }
+
+    int
+    copy(const std::string &from,
+         const std::string &to)
+    {
+      return ENOTSUP;
+    }
+  }
+}

src/fs_base_access.hpp

@@ -0,0 +1,55 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <fcntl.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  access(const int          dirfd,
+         const std::string &path,
+         const int          mode,
+         const int          flags)
+  {
+    return ::faccessat(dirfd,path.c_str(),mode,flags);
+  }
+
+  static
+  inline
+  int
+  access(const std::string &path,
+         const int          mode,
+         const int          flags)
+  {
+    return fs::access(AT_FDCWD,path,mode,flags);
+  }
+
+  static
+  inline
+  int
+  eaccess(const std::string &path,
+          const int          mode)
+  {
+    return fs::access(path,mode,AT_EACCESS);
+  }
+}

src/fs_base_chmod.hpp

@@ -0,0 +1,49 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/stat.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  chmod(const std::string &path,
+        const mode_t       mode)
+  {
+    return ::chmod(path.c_str(),mode);
+  }
+
+  static
+  inline
+  int
+  fchmod(const int    fd,
+         const mode_t mode)
+  {
+    return ::fchmod(fd,mode);
+  }
+
+  static
+  inline
+  int
+  fchmod(const int          fd,
+         const struct stat &st)
+  {
+    return ::fchmod(fd,st.st_mode);
+  }
+}

src/fs_base_chown.hpp

@@ -0,0 +1,74 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  chown(const std::string &path,
+        const uid_t        uid,
+        const gid_t        gid)
+  {
+    return ::chown(path.c_str(),uid,gid);
+  }
+
+  static
+  inline
+  int
+  chown(const std::string &path,
+        const struct stat &st)
+  {
+    return fs::chown(path,st.st_uid,st.st_gid);
+  }
+
+  static
+  inline
+  int
+  lchown(const std::string &path,
+         const uid_t        uid,
+         const gid_t        gid)
+  {
+    return ::lchown(path.c_str(),uid,gid);
+  }
+
+  static
+  inline
+  int
+  fchown(const int   fd,
+         const uid_t uid,
+         const gid_t gid)
+  {
+    return ::fchown(fd,uid,gid);
+  }
+
+  static
+  inline
+  int
+  fchown(const int          fd,
+         const struct stat &st)
+  {
+    return fs::fchown(fd,st.st_uid,st.st_gid);
+  }
+}

src/fs_base_close.hpp

@@ -0,0 +1,30 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  close(const int fd)
+  {
+    return ::close(fd);
+  }
+}

src/fs_base_closedir.hpp

@@ -0,0 +1,31 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <dirent.h>
+#include <sys/types.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  closedir(DIR *dirp)
+  {
+    return ::closedir(dirp);
+  }
+}

src/fs_base_dup.hpp

@@ -0,0 +1,30 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  dup(const int fd)
+  {
+    return ::dup(fd);
+  }
+}

src/fs_base_flock.hpp

@@ -0,0 +1,31 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/file.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  flock(const int fd,
+        const int operation)
+  {
+    return ::flock(fd,operation);
+  }
+}

src/fs_base_fsync.hpp

@@ -0,0 +1,43 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <errno.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  fsync(const int fd)
+  {
+    return ::fsync(fd);
+  }
+
+  static
+  inline
+  int
+  fdatasync(const int fd)
+  {
+#if _POSIX_SYNCHRONIZED_IO > 0
+    return ::fdatasync(fd);
+#else
+    return (errno=ENOSYS,-1);
+#endif
+  }
+}

src/fs_base_ftruncate.hpp

@@ -0,0 +1,32 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  ftruncate(const int   fd,
+            const off_t size)
+  {
+    return ::ftruncate(fd,size);
+  }
+}

src/fs_base_getxattr.hpp

@@ -0,0 +1,40 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/types.h>
+
+#include "errno.hpp"
+#include "xattr.hpp"
+
+namespace fs
+{
+  static
+  inline
+  int
+  lgetxattr(const std::string &path,
+            const char        *attrname,
+            void              *value,
+            const size_t       size)
+  {
+#ifndef WITHOUT_XATTR
+    return ::lgetxattr(path.c_str(),attrname,value,size);
+#else
+    return (errno=ENOTSUP,-1);
+#endif
+  }
+}

src/fs_base_ioctl.hpp

@@ -0,0 +1,32 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/ioctl.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  ioctl(const int  fd,
+        const int  request,
+        void      *data)
+  {
+    return ::ioctl(fd,request,data);
+  }
+}

src/fs_base_link.hpp

@@ -0,0 +1,33 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  link(const std::string &oldpath,
+       const std::string &newpath)
+  {
+    return ::link(oldpath.c_str(),newpath.c_str());
+  }
+}

src/fs_base_listxattr.hpp

@@ -0,0 +1,39 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/types.h>
+
+#include "errno.hpp"
+#include "xattr.hpp"
+
+namespace fs
+{
+  static
+  inline
+  int
+  llistxattr(const std::string &path,
+             char              *list,
+             const size_t       size)
+  {
+#ifndef WITHOUT_XATTR
+    return ::llistxattr(path.c_str(),list,size);
+#else
+    return (errno=ENOTSUP,-1);
+#endif
+  }
+}

src/fs_base_lseek.hpp

@@ -0,0 +1,33 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  off_t
+  lseek(const int   fd,
+        const off_t offset,
+        const int   whence)
+  {
+    return ::lseek(fd,offset,whence);
+  }
+}

src/fs_base_mkdir.hpp

@@ -0,0 +1,34 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  mkdir(const std::string &path,
+        const mode_t       mode)
+  {
+    return ::mkdir(path.c_str(),mode);
+  }
+}

src/fs_base_mknod.hpp

@@ -0,0 +1,35 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  mknod(const std::string &path,
+        const mode_t       mode,
+        const dev_t        dev)
+  {
+    return ::mknod(path.c_str(),mode,dev);
+  }
+}

src/fs_base_open.hpp

@@ -0,0 +1,45 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  open(const std::string &path,
+       const int          flags)
+  {
+    return ::open(path.c_str(),flags);
+  }
+
+  static
+  inline
+  int
+  open(const std::string &path,
+       const int          flags,
+       const mode_t       mode)
+  {
+    return ::open(path.c_str(),flags,mode);
+  }
+}

src/fs_base_opendir.hpp

@@ -0,0 +1,33 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <dirent.h>
+#include <sys/types.h>
+
+namespace fs
+{
+  static
+  inline
+  DIR *
+  opendir(const std::string &name)
+  {
+    return ::opendir(name.c_str());
+  }
+}

src/fs_base_read.hpp

@@ -0,0 +1,43 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  ssize_t
+  read(const int     fd,
+       void         *buf,
+       const size_t  count)
+  {
+    return ::read(fd,buf,count);
+  }
+
+  static
+  inline
+  ssize_t
+  pread(const int     fd,
+        void         *buf,
+        const size_t  count,
+        const off_t   offset)
+  {
+    return ::pread(fd,buf,count,offset);
+  }
+}

src/fs_base_readdir.hpp

@@ -0,0 +1,30 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <dirent.h>
+
+namespace fs
+{
+  static
+  inline
+  struct dirent *
+  readdir(DIR *dirp)
+  {
+    return ::readdir(dirp);
+  }
+}

src/fs_base_readlink.hpp

@@ -0,0 +1,34 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  readlink(const std::string &path,
+           char              *buf,
+           const size_t       bufsiz)
+  {
+    return ::readlink(path.c_str(),buf,bufsiz);
+  }
+}

src/fs_base_realpath.hpp

@@ -0,0 +1,42 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <limits.h>
+#include <stdlib.h>
+
+namespace fs
+{
+  static
+  inline
+  char *
+  realpath(const std::string &path,
+           char              *resolved_path)
+  {
+    return ::realpath(path.c_str(),resolved_path);
+  }
+
+  static
+  inline
+  char *
+  realpath(const std::string &path)
+  {
+    return fs::realpath(path,NULL);
+  }
+}

src/fs_base_removexattr.hpp

@@ -0,0 +1,38 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/types.h>
+
+#include "errno.hpp"
+#include "xattr.hpp"
+
+namespace fs
+{
+  static
+  inline
+  int
+  lremovexattr(const std::string &path,
+               const char        *attrname)
+  {
+#ifndef WITHOUT_XATTR
+    return ::lremovexattr(path.c_str(),attrname);
+#else
+    return (errno=ENOTSUP,-1);
+#endif
+  }
+}

src/fs_base_rename.hpp

@@ -0,0 +1,31 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <stdio.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  rename(const std::string &oldpath,
+         const std::string &newpath)
+  {
+    return ::rename(oldpath.c_str(),newpath.c_str());
+  }
+}

src/fs_base_rmdir.hpp

@@ -0,0 +1,32 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  rmdir(const std::string &path)
+  {
+    return ::rmdir(path.c_str());
+  }
+}

src/fs_base_setxattr.hpp

@@ -0,0 +1,41 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/types.h>
+
+#include "errno.hpp"
+#include "xattr.hpp"
+
+namespace fs
+{
+  static
+  inline
+  int
+  lsetxattr(const std::string &path,
+            const char        *name,
+            const void        *value,
+            const size_t       size,
+            const int          flags)
+  {
+#ifndef WITHOUT_XATTR
+    return ::lsetxattr(path.c_str(),name,value,size,flags);
+#else
+    return (errno=ENOTSUP,-1);
+#endif
+  }
+}

src/fs_base_stat.hpp

@@ -0,0 +1,62 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  stat(const char  *path,
+       struct stat &st)
+  {
+    return ::stat(path,&st);
+  }
+
+  static
+  inline
+  int
+  stat(const std::string &path,
+       struct stat       &st)
+  {
+    return fs::stat(path.c_str(),st);
+  }
+
+  static
+  inline
+  int
+  lstat(const std::string &path,
+        struct stat       &st)
+  {
+    return ::lstat(path.c_str(),&st);
+  }
+
+  static
+  inline
+  int
+  fstat(const int    fd,
+        struct stat &st)
+  {
+    return ::fstat(fd,&st);
+  }
+}

src/fs_base_statvfs.hpp

@@ -0,0 +1,42 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <sys/statvfs.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  statvfs(const char     *path,
+          struct statvfs &st)
+  {
+    return ::statvfs(path,&st);
+  }
+
+  static
+  inline
+  int
+  statvfs(const std::string &path,
+          struct statvfs    &st)
+  {
+    return fs::statvfs(path.c_str(),st);
+  }
+}

src/fs_base_truncate.hpp

@@ -0,0 +1,34 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  truncate(const std::string &path,
+           const off_t        length)
+  {
+    return ::truncate(path.c_str(),length);
+  }
+}

src/fs_base_unlink.hpp

@@ -0,0 +1,32 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  unlink(const std::string &path)
+  {
+    return ::unlink(path.c_str());
+  }
+}

src/fs_base_utime.hpp

@@ -0,0 +1,63 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifdef __linux__
+# include "fs_base_utime_utimensat.hpp"
+#elif __FreeBSD__ >= 11
+# include "fs_base_utime_utimensat.hpp"
+#else
+# include "fs_base_utime_generic.hpp"
+#endif
+
+namespace fs
+{
+  static
+  inline
+  int
+  utime(const std::string &path,
+        const struct stat &st)
+  {
+    struct timespec times[2];
+
+    times[0] = st.st_atim;
+    times[1] = st.st_mtim;
+
+    return fs::utime(AT_FDCWD,path,times,0);
+  }
+
+  static
+  inline
+  int
+  utime(const int          fd,
+        const struct stat &st)
+  {
+    struct timespec times[2];
+
+    times[0] = st.st_atim;
+    times[1] = st.st_mtim;
+
+    return fs::utime(fd,times);
+  }
+
+  static
+  inline
+  int
+  lutime(const std::string     &path,
+         const struct timespec  times[2])
+  {
+    return fs::utime(AT_FDCWD,path,times,AT_SYMLINK_NOFOLLOW);
+  }
+}

src/fs_base_utime_generic.hpp

@@ -0,0 +1,298 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+
+#ifndef UTIME_NOW
+# define UTIME_NOW  ((1l << 30) - 1l)
+#endif
+
+#ifndef UTIME_OMIT
+# define UTIME_OMIT ((1l << 30) - 2l)
+#endif
+
+static
+inline
+bool
+_can_call_lutimes(const int          dirfd,
+                  const std::string &path,
+                  const int          flags)
+{
+  return ((flags == AT_SYMLINK_NOFOLLOW) &&
+          ((dirfd == AT_FDCWD) ||
+           (path[0] == '/')));
+}
+
+static
+inline
+bool
+_should_ignore(const struct timespec ts[2])
+{
+  return ((ts != NULL) &&
+          (ts[0].tv_nsec == UTIME_OMIT) &&
+          (ts[1].tv_nsec == UTIME_OMIT));
+}
+
+static
+inline
+bool
+_should_be_set_to_now(const struct timespec ts[2])
+{
+  return ((ts == NULL) ||
+          ((ts[0].tv_nsec == UTIME_NOW) &&
+           (ts[1].tv_nsec == UTIME_NOW)));
+}
+
+static
+inline
+bool
+_timespec_invalid(const struct timespec &ts)
+{
+  return (((ts.tv_nsec < 0) ||
+           (ts.tv_nsec > 999999999)) &&
+          ((ts.tv_nsec != UTIME_NOW) &&
+           (ts.tv_nsec != UTIME_OMIT)));
+}
+
+static
+inline
+bool
+_timespec_invalid(const struct timespec ts[2])
+{
+  return ((ts != NULL) &&
+          (_timespec_invalid(ts[0]) ||
+           _timespec_invalid(ts[1])));
+}
+
+static
+inline
+bool
+_flags_invalid(const int flags)
+{
+  return ((flags & ~AT_SYMLINK_NOFOLLOW) != 0);
+}
+
+static
+inline
+bool
+_any_timespec_is_utime_omit(const struct timespec ts[2])
+{
+  return ((ts[0].tv_nsec == UTIME_OMIT) ||
+          (ts[1].tv_nsec == UTIME_OMIT));
+}
+
+static
+inline
+bool
+_any_timespec_is_utime_now(const struct timespec ts[2])
+{
+  return ((ts[0].tv_nsec == UTIME_NOW) ||
+          (ts[1].tv_nsec == UTIME_NOW));
+}
+
+static
+inline
+int
+_set_utime_omit_to_current_value(const int              dirfd,
+                                 const std::string     &path,
+                                 const struct timespec  ts[2],
+                                 struct timeval         tv[2],
+                                 const int              flags)
+{
+  int rv;
+  struct stat st;
+
+  if(!_any_timespec_is_utime_omit(ts))
+    return 0;
+
+  rv = ::fstatat(dirfd,path.c_str(),&st,flags);
+  if(rv == -1)
+    return -1;
+
+  if(ts[0].tv_nsec == UTIME_OMIT)
+    TIMESPEC_TO_TIMEVAL(&tv[0],&st.st_atim);
+  if(ts[1].tv_nsec == UTIME_OMIT)
+    TIMESPEC_TO_TIMEVAL(&tv[1],&st.st_mtim);
+
+  return 0;
+}
+
+static
+inline
+int
+_set_utime_omit_to_current_value(const int             fd,
+                                 const struct timespec ts[2],
+                                 struct timeval        tv[2])
+{
+  int rv;
+  struct stat st;
+
+  if(!_any_timespec_is_utime_omit(ts))
+    return 0;
+
+  rv = ::fstat(fd,&st);
+  if(rv == -1)
+    return -1;
+
+  if(ts[0].tv_nsec == UTIME_OMIT)
+    TIMESPEC_TO_TIMEVAL(&tv[0],&st.st_atim);
+  if(ts[1].tv_nsec == UTIME_OMIT)
+    TIMESPEC_TO_TIMEVAL(&tv[1],&st.st_mtim);
+
+  return 0;
+}
+
+static
+inline
+int
+_set_utime_now_to_now(const struct timespec ts[2],
+                      struct timeval        tv[2])
+{
+  int rv;
+  struct timeval now;
+
+  if(_any_timespec_is_utime_now(ts))
+    return 0;
+
+  rv = ::gettimeofday(&now,NULL);
+  if(rv == -1)
+    return -1;
+
+  if(ts[0].tv_nsec == UTIME_NOW)
+    tv[0] = now;
+  if(ts[1].tv_nsec == UTIME_NOW)
+    tv[1] = now;
+
+  return 0;
+}
+
+static
+inline
+int
+_convert_timespec_to_timeval(const int               dirfd,
+                             const std::string      &path,
+                             const struct timespec   ts[2],
+                             struct timeval          tv[2],
+                             struct timeval        *&tvp,
+                             const int               flags)
+{
+  int rv;
+
+  if(_should_be_set_to_now(ts))
+    return (tvp=NULL,0);
+
+  TIMESPEC_TO_TIMEVAL(&tv[0],&ts[0]);
+  TIMESPEC_TO_TIMEVAL(&tv[1],&ts[1]);
+
+  rv = _set_utime_omit_to_current_value(dirfd,path,ts,tv,flags);
+  if(rv == -1)
+    return -1;
+
+  rv = _set_utime_now_to_now(ts,tv);
+  if(rv == -1)
+    return -1;
+
+  return (tvp=tv,0);
+}
+
+static
+inline
+int
+_convert_timespec_to_timeval(const int               fd,
+                             const struct timespec   ts[2],
+                             struct timeval          tv[2],
+                             struct timeval        *&tvp)
+{
+  int rv;
+
+  if(_should_be_set_to_now(ts))
+    return (tvp=NULL,0);
+
+  TIMESPEC_TO_TIMEVAL(&tv[0],&ts[0]);
+  TIMESPEC_TO_TIMEVAL(&tv[1],&ts[1]);
+
+  rv = _set_utime_omit_to_current_value(fd,ts,tv);
+  if(rv == -1)
+    return -1;
+
+  rv = _set_utime_now_to_now(ts,tv);
+  if(rv == -1)
+    return -1;
+
+  return (tvp=tv,0);
+}
+
+namespace fs
+{
+  static
+  inline
+  int
+  utime(const int              dirfd,
+        const std::string     &path,
+        const struct timespec  ts[2],
+        const int              flags)
+  {
+    int rv;
+    struct timeval  tv[2];
+    struct timeval *tvp;
+
+    if(_flags_invalid(flags))
+      return (errno=EINVAL,-1);
+    if(_timespec_invalid(ts))
+      return (errno=EINVAL,-1);
+    if(_should_ignore(ts))
+      return 0;
+
+    rv = _convert_timespec_to_timeval(dirfd,path,ts,tv,tvp,flags);
+    if(rv == -1)
+      return -1;
+
+    if((flags & AT_SYMLINK_NOFOLLOW) == 0)
+      return ::futimesat(dirfd,path.c_str(),tvp);
+    if(_can_call_lutimes(dirfd,path,flags))
+      return ::lutimes(path.c_str(),tvp);
+
+    return (errno=ENOTSUP,-1);
+  }
+
+  static
+  inline
+  int
+  utime(const int             fd,
+        const struct timespec ts[2])
+  {
+    int rv;
+    struct timeval  tv[2];
+    struct timeval *tvp;
+
+    if(_timespec_invalid(ts))
+      return (errno=EINVAL,-1);
+    if(_should_ignore(ts))
+      return 0;
+
+    rv = _convert_timespec_to_timeval(fd,ts,tv,tvp);
+    if(rv == -1)
+      return -1;
+
+    return ::futimes(fd,tvp);
+  }
+}

src/fs_base_utime_utimensat.hpp

@@ -0,0 +1,45 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include <fcntl.h>
+#include <sys/stat.h>
+
+namespace fs
+{
+  static
+  inline
+  int
+  utime(const int              dirfd,
+        const std::string     &path,
+        const struct timespec  times[2],
+        const int              flags)
+  {
+    return ::utimensat(dirfd,path.c_str(),times,flags);
+  }
+
+  static
+  inline
+  int
+  utime(const int             fd,
+        const struct timespec times[2])
+  {
+    return ::futimens(fd,times);
+  }
+}

src/fs_base_write.hpp

@@ -0,0 +1,43 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <unistd.h>
+
+namespace fs
+{
+  static
+  inline
+  ssize_t
+  write(const int     fd,
+        const void   *buf,
+        const size_t  count)
+  {
+    return ::write(fd,buf,count);
+  }
+
+  static
+  inline
+  ssize_t
+  pwrite(const int     fd,
+         const void   *buf,
+         const size_t  count,
+         const off_t   offset)
+  {
+    return ::pwrite(fd,buf,count,offset);
+  }
+}

src/fs_clonefile.cpp

@@ -0,0 +1,222 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+#include <stdlib.h>
+
+#include <string>
+#include <vector>
+
+#include "errno.hpp"
+#include "fs_attr.hpp"
+#include "fs_base_chmod.hpp"
+#include "fs_base_chown.hpp"
+#include "fs_base_close.hpp"
+#include "fs_base_lseek.hpp"
+#include "fs_base_mkdir.hpp"
+#include "fs_base_open.hpp"
+#include "fs_base_read.hpp"
+#include "fs_base_stat.hpp"
+#include "fs_base_utime.hpp"
+#include "fs_base_write.hpp"
+#include "fs_fadvise.hpp"
+#include "fs_fallocate.hpp"
+#include "fs_sendfile.hpp"
+#include "fs_xattr.hpp"
+
+#ifndef O_LARGEFILE
+# define O_LARGEFILE 0
+#endif
+
+#ifndef O_NOATIME
+# define O_NOATIME 0
+#endif
+
+using std::string;
+using std::vector;
+
+int
+writen(const int     fd,
+       const char   *buf,
+       const size_t  count)
+{
+  size_t nleft;
+  ssize_t nwritten;
+
+  nleft = count;
+  while(nleft > 0)
+    {
+      nwritten = fs::write(fd,buf,nleft);
+      if(nwritten == -1)
+        {
+          if(errno == EINTR)
+            continue;
+          return -1;
+        }
+
+      nleft -= nwritten;
+      buf   += nwritten;
+    }
+
+  return count;
+}
+
+static
+int
+copyfile_rw(const int    fdin,
+            const int    fdout,
+            const size_t count,
+            const size_t blocksize)
+{
+  ssize_t nr;
+  ssize_t nw;
+  ssize_t bufsize;
+  size_t  totalwritten;
+  vector<char> buf;
+
+  bufsize = (blocksize * 16);
+  buf.resize(bufsize);
+
+  fs::lseek(fdin,0,SEEK_SET);
+
+  totalwritten = 0;
+  while(totalwritten < count)
+    {
+      nr = fs::read(fdin,&buf[0],bufsize);
+      if(nr == -1)
+        {
+          if(errno == EINTR)
+            continue;
+          return -1;
+        }
+
+      nw = writen(fdout,&buf[0],nr);
+      if(nw == -1)
+        return -1;
+
+      totalwritten += nw;
+    }
+
+  return count;
+}
+
+static
+int
+copydata(const int    fdin,
+         const int    fdout,
+         const size_t count,
+         const size_t blocksize)
+{
+  int rv;
+
+  fs::fadvise(fdin,0,count,POSIX_FADV_WILLNEED);
+  fs::fadvise(fdin,0,count,POSIX_FADV_SEQUENTIAL);
+
+  fs::fallocate(fdout,0,0,count);
+
+  rv = fs::sendfile(fdin,fdout,count);
+  if((rv == -1) && ((errno == EINVAL) || (errno == ENOSYS)))
+    return ::copyfile_rw(fdin,fdout,count,blocksize);
+
+  return rv;
+}
+
+static
+bool
+ignorable_error(const int err)
+{
+  switch(err)
+    {
+    case ENOTTY:
+    case ENOTSUP:
+#if ENOTSUP != EOPNOTSUPP
+    case EOPNOTSUPP:
+#endif
+      return true;
+    }
+
+  return false;
+}
+
+namespace fs
+{
+  int
+  clonefile(const int fdin,
+            const int fdout)
+  {
+    int rv;
+    struct stat stin;
+
+    rv = fs::fstat(fdin,stin);
+    if(rv == -1)
+      return -1;
+
+    rv = ::copydata(fdin,fdout,stin.st_size,stin.st_blksize);
+    if(rv == -1)
+      return -1;
+
+    rv = fs::attr::copy(fdin,fdout);
+    if((rv == -1) && !ignorable_error(errno))
+      return -1;
+
+    rv = fs::xattr::copy(fdin,fdout);
+    if((rv == -1) && !ignorable_error(errno))
+      return -1;
+
+    rv = fs::fchown(fdout,stin);
+    if(rv == -1)
+      return -1;
+
+    rv = fs::fchmod(fdout,stin);
+    if(rv == -1)
+      return -1;
+
+    rv = fs::utime(fdout,stin);
+    if(rv == -1)
+      return -1;
+
+    return 0;
+  }
+
+  int
+  clonefile(const string &in,
+            const string &out)
+  {
+    int rv;
+    int fdin;
+    int fdout;
+    int error;
+
+    fdin = fs::open(in,O_RDONLY|O_NOFOLLOW);
+    if(fdin == -1)
+      return -1;
+
+    const int    flags = O_CREAT|O_LARGEFILE|O_NOATIME|O_NOFOLLOW|O_TRUNC|O_WRONLY;
+    const mode_t mode  = S_IWUSR;
+    fdout = fs::open(out,flags,mode);
+    if(fdout == -1)
+      return -1;
+
+    rv = fs::clonefile(fdin,fdout);
+    error = errno;
+
+    fs::close(fdin);
+    fs::close(fdout);
+
+    errno = error;
+    return rv;
+  }
+}

src/fs_clonefile.hpp

@@ -0,0 +1,25 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+namespace fs
+{
+  int clonefile(const int fdin,
+                const int fdout);
+  int clonefile(const std::string &from,
+                const std::string &to);
+}

src/fs_clonepath.cpp

@@ -0,0 +1,108 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include "errno.h"
+#include "fs_attr.hpp"
+#include "fs_base_chmod.hpp"
+#include "fs_base_chown.hpp"
+#include "fs_base_mkdir.hpp"
+#include "fs_base_stat.hpp"
+#include "fs_base_utime.hpp"
+#include "fs_path.hpp"
+#include "fs_xattr.hpp"
+
+using std::string;
+
+static
+bool
+ignorable_error(const int err)
+{
+  switch(err)
+    {
+    case ENOTTY:
+    case ENOTSUP:
+#if ENOTSUP != EOPNOTSUPP
+    case EOPNOTSUPP:
+#endif
+      return true;
+    }
+
+  return false;
+}
+
+namespace fs
+{
+  int
+  clonepath(const string &fromsrc,
+            const string &tosrc,
+            const char   *relative)
+  {
+    int         rv;
+    struct stat st;
+    string      topath;
+    string      frompath;
+    string      dirname;
+
+    dirname = relative;
+    fs::path::dirname(dirname);
+    if(!dirname.empty())
+      {
+        rv = fs::clonepath(fromsrc,tosrc,dirname.c_str());
+        if(rv == -1)
+          return -1;
+      }
+
+    fs::path::make(&fromsrc,relative,frompath);
+    rv = fs::stat(frompath,st);
+    if(rv == -1)
+      return -1;
+    else if(!S_ISDIR(st.st_mode))
+      return (errno=ENOTDIR,-1);
+
+    fs::path::make(&tosrc,relative,topath);
+    rv = fs::mkdir(topath,st.st_mode);
+    if(rv == -1)
+      {
+        if(errno != EEXIST)
+          return -1;
+
+        rv = fs::chmod(topath,st.st_mode);
+        if(rv == -1)
+          return -1;
+      }
+
+    // It may not support it... it's fine...
+    rv = fs::attr::copy(frompath,topath);
+    if((rv == -1) && !ignorable_error(errno))
+      return -1;
+
+    rv = fs::xattr::copy(frompath,topath);
+    if((rv == -1) && !ignorable_error(errno))
+      return -1;
+
+    rv = fs::chown(topath,st);
+    if(rv == -1)
+      return -1;
+
+    rv = fs::utime(topath,st);
+    if(rv == -1)
+      return -1;
+
+    return 0;
+  }
+}

src/fs_clonepath.hpp

@@ -0,0 +1,24 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+namespace fs
+{
+  int clonepath(const std::string &from,
+                const std::string &to,
+                const char        *relative);
+}

src/fs_fadvise.cpp

@@ -0,0 +1,23 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+
+#if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
+# include "fs_fadvise_posix.icpp"
+#else
+# include "fs_fadvise_unsupported.icpp"
+#endif

src/fs_fadvise.hpp

@@ -0,0 +1,53 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_FADVISE_HPP__
+#define __FS_FADVISE_HPP__
+
+#ifndef POSIX_FADV_NORMAL
+# define POSIX_FADV_NORMAL 0
+#endif
+
+#ifndef POSIX_FADV_RANDOM
+# define POSIX_FADV_RANDOM 1
+#endif
+
+#ifndef POSIX_FADV_SEQUENTIAL
+# define POSIX_FADV_SEQUENTIAL 2
+#endif
+
+#ifndef POSIX_FADV_WILLNEED
+# define POSIX_FADV_WILLNEED 3
+#endif
+
+#ifndef POSIX_FADV_DONTNEED
+# define POSIX_FADV_DONTNEED 4
+#endif
+
+#ifndef POSIX_FADV_NOREUSE
+# define POSIX_FADV_NOREUSE 5
+#endif
+
+namespace fs
+{
+  int
+  fadvise(const int   fd,
+          const off_t offset,
+          const off_t len,
+          const int   advice);
+}
+
+#endif // __FS_FADVISE_HPP__

src/fs_fadvise_posix.icpp

@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "errno.hpp"
+
+namespace fs
+{
+  int
+  fadvise(const int   fd,
+          const off_t offset,
+          const off_t len,
+          const int   advice)
+  {
+    return ::posix_fadvise(fd,offset,len,advice);
+  }
+}

src/fs_fadvise_unsupported.icpp

@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "errno.hpp"
+
+namespace fs
+{
+  int
+  fadvise(const int   fd,
+          const off_t offset,
+          const off_t len,
+          const int   advice)
+  {
+    return (errno=EOPNOTSUPP,-1);
+  }
+}

src/fs_fallocate.cpp

@@ -0,0 +1,27 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+
+#ifdef __linux__
+# include "fs_fallocate_linux.icpp"
+#elif _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
+# include "fs_fallocate_posix.icpp"
+#elif __APPLE__
+# include "fs_fallocate_osx.icpp"
+#else
+# include "fs_fallocate_unsupported.icpp"
+#endif

src/fs_fallocate.hpp

@@ -0,0 +1,31 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_FALLOCATE_HPP__
+#define __FS_FALLOCATE_HPP__
+
+#include <fcntl.h>
+
+namespace fs
+{
+  int
+  fallocate(const int   fd,
+            const int   mode,
+            const off_t offset,
+            const off_t len);
+}
+
+#endif // __FS_FALLOCATE_HPP__

src/fs_fallocate_linux.icpp

@@ -0,0 +1,32 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+
+#include "errno.hpp"
+#include "fs_fallocate.hpp"
+
+namespace fs
+{
+  int
+  fallocate(const int   fd,
+            const int   mode,
+            const off_t offset,
+            const off_t len)
+  {
+    return ::fallocate(fd,mode,offset,len);
+  }
+}

src/fs_fallocate_osx.icpp

@@ -0,0 +1,57 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+
+#include "errno.hpp"
+#include "fs_fallocate.hpp"
+
+namespace fs
+{
+  static
+  int
+  _fallocate_core(const int   fd,
+                  const off_t offset,
+                  const off_t len)
+  {
+    int rv;
+    fstore_t store = {F_ALLOCATECONTIG,F_PEOFPOSMODE,offset,len,0};
+
+    rv = ::fcntl(fd,F_PREALLOCATE,&store);
+    if(rv == -1)
+      {
+        store.fst_flags = F_ALLOCATEALL;
+        rv = ::fcntl(fd,F_PREALLOCATE,&store);
+      }
+
+    if(rv == -1)
+      return rv;
+
+    return ::ftruncate(fd,(offset+len));
+  }
+
+  int
+  fallocate(const int   fd,
+            const int   mode,
+            const off_t offset,
+            const off_t len)
+  {
+    if(mode)
+      return (errno=EOPNOTSUPP,-1);
+
+    return ::_fallocate_core(fd,offset,len);
+  }
+}

src/fs_fallocate_posix.icpp

@@ -0,0 +1,34 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+
+#include "errno.hpp"
+#include "fs_fallocate.hpp"
+
+namespace fs
+{
+  int
+  fallocate(const int   fd,
+            const int   mode,
+            const off_t offset,
+            const off_t len)
+  {
+    return (mode ?
+            (errno=EOPNOTSUPP,-1) :
+            (::posix_fallocate(fd,offset,len)));
+  }
+}

src/fs_fallocate_unsupported.icpp

@@ -0,0 +1,30 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "errno.hpp"
+#include "fs_fallocate.hpp"
+
+namespace fs
+{
+  int
+  fallocate(const int   fd,
+            const int   mode,
+            const off_t offset,
+            const off_t len)
+  {
+    return (errno=EOPNOTSUPP,-1);
+  }
+}

src/fs_movefile.cpp

@@ -0,0 +1,114 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+
+#include "fs.hpp"
+#include "fs_base_open.hpp"
+#include "fs_base_close.hpp"
+#include "fs_base_unlink.hpp"
+#include "fs_base_stat.hpp"
+#include "fs_clonefile.hpp"
+#include "fs_clonepath.hpp"
+#include "fs_path.hpp"
+
+using std::string;
+using std::vector;
+
+namespace fs
+{
+  int
+  movefile(const vector<string> &basepaths,
+           const char           *fusepath,
+           const size_t          additional_size,
+           int                  &origfd)
+  {
+    int rv;
+    int fdin;
+    int fdout;
+    int fdin_flags;
+    string fusedir;
+    string fdin_path;
+    string fdout_path;
+    struct stat fdin_st;
+
+    fdin = origfd;
+
+    rv = fs::fstat(fdin,fdin_st);
+    if(rv == -1)
+      return -1;
+
+    fdin_flags = fs::getfl(fdin);
+    if(rv == -1)
+      return -1;
+
+    rv = fs::findonfs(basepaths,fusepath,fdin,fdin_path);
+    if(rv == -1)
+      return -1;
+
+    fdin_st.st_size += additional_size;
+    rv = fs::mfs(basepaths,fdin_st.st_size,fdout_path);
+    if(rv == -1)
+      return -1;
+
+    fusedir = fusepath;
+    fs::path::dirname(fusedir);
+    rv = fs::clonepath(fdin_path,fdout_path,fusedir.c_str());
+    if(rv == -1)
+      return -1;
+
+    fs::path::append(fdin_path,fusepath);
+    fdin = fs::open(fdin_path,O_RDONLY);
+    if(fdin == -1)
+      return -1;
+
+    fs::path::append(fdout_path,fusepath);
+    fdout = fs::open(fdout_path,fdin_flags|O_CREAT,fdin_st.st_mode);
+    if(fdout == -1)
+      return -1;
+
+    rv = fs::clonefile(fdin,fdout);
+    if(rv == -1)
+      {
+        fs::close(fdin);
+        fs::close(fdout);
+        fs::unlink(fdout_path.c_str());
+        return -1;
+      }
+
+    rv = fs::unlink(fdin_path);
+    if(rv == -1)
+      {
+        fs::close(fdin);
+        fs::close(fdout);
+        fs::unlink(fdout_path);
+        return -1;
+      }
+
+    fs::close(fdin);
+    fs::close(origfd);
+
+    origfd = fdout;
+
+    return 0;
+  }
+}

src/fs_movefile.hpp

@@ -0,0 +1,32 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_MOVEFILE_HPP__
+#define __FS_MOVEFILE_HPP__
+
+#include <string>
+#include <vector>
+
+namespace fs
+{
+  int
+  movefile(const vector<string> &basepaths,
+           const char           *fusepath,
+           const size_t          additional_size,
+           int                  &origfd);
+}
+
+#endif

src/fs_path.cpp

@@ -0,0 +1,58 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <string>
+
+#include "fs_path.hpp"
+
+using std::string;
+
+namespace fs
+{
+  namespace path
+  {
+    void
+    dirname(string &path)
+    {
+      string::reverse_iterator i;
+      string::reverse_iterator bi;
+
+      bi = path.rend();
+      i  = path.rbegin();
+      while(*i == '/' && i != bi)
+        i++;
+
+      while(*i != '/' && i != bi)
+        i++;
+
+      while(*i == '/' && i != bi)
+        i++;
+
+      path.erase(i.base(),path.end());
+    }
+
+    string
+    basename(const string &path)
+    {
+      return path.substr(path.find_last_of('/')+1);
+    }
+  }
+}

src/fs_path.hpp

@@ -0,0 +1,53 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_PATH_HPP__
+#define __FS_PATH_HPP__
+
+#include <string>
+#include <vector>
+
+namespace fs
+{
+  namespace path
+  {
+    using std::string;
+
+    void dirname(string &path);
+
+    string basename(const string &path);
+
+    inline
+    void
+    append(string     &base,
+           const char *suffix)
+    {
+      base += suffix;
+    }
+
+    inline
+    void
+    make(const string *base,
+         const char   *suffix,
+         string       &output)
+    {
+      output  = *base;
+      output += suffix;
+    }
+  }
+};
+
+#endif // __FS_PATH_HPP__

src/fs_sendfile.cpp

@@ -0,0 +1,21 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifdef __linux__
+# include "fs_sendfile_linux.icpp"
+#else
+# include "fs_sendfile_unsupported.icpp"
+#endif

src/fs_sendfile.hpp

@@ -0,0 +1,28 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_SENDFILE_HPP__
+#define __FS_SENDFILE_HPP__
+
+namespace fs
+{
+  ssize_t
+  sendfile(const int    fdin,
+           const int    fdout,
+           const size_t count);
+}
+
+#endif // __FS_SENDFILE_HPP__

src/fs_sendfile_linux.icpp

@@ -0,0 +1,32 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <sys/sendfile.h>
+
+#include "errno.hpp"
+
+namespace fs
+{
+  ssize_t
+  sendfile(const int    fdin,
+           const int    fdout,
+           const size_t count)
+  {
+    off_t offset = 0;
+
+    return ::sendfile(fdout,fdin,&offset,count);
+  }
+}