From 68a35e65f228244ebdb5d4ce3ad386eca8292672 Mon Sep 17 00:00:00 2001
From: RustDesk <71636191+rustdesk@users.noreply.github.com>
Date: Wed, 23 Sep 2026 14:05:15 +0800
Subject: [PATCH] fix(unix): ignore SIGPIPE in native Flutter entry (#16322)

* fix(linux): ignore SIGPIPE in Flutter runner

Initialize SIGPIPE before entering the Rust core so writes to closed IPC peers return EPIPE instead of terminating the server. Add a native-entry regression test for the failure reported in #16297.

* test(linux): remove SIGPIPE runner test

* fix(flutter): initialize SIGPIPE in the Rust native entry

Share SIGPIPE initialization between the Linux and macOS native runners before core startup. Remove the Linux C++ initialization.

* fix: share SIGPIPE initialization with Sciter startup

Initialize SIGPIPE before global_init in core_main, shared by Flutter and Sciter on Linux and macOS.

* fix(flutter): keep SIGPIPE setup in the native FFI entry

Sciter already receives SIGPIPE initialization from the Rust runtime. Scope the missing startup initialization to native Flutter runners on Linux and macOS.
---
 src/flutter.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/flutter.rs b/src/flutter.rs
index 5c453d468..cd1f1567d 100644
--- a/src/flutter.rs
+++ b/src/flutter.rs
@@ -105,6 +105,16 @@ fn load_plugin_in_app_path(dll_name: &str) -> Result<Library, LibError> {
 #[cfg(not(windows))]
 #[no_mangle]
 pub extern "C" fn rustdesk_core_main() -> bool {
+    #[cfg(any(target_os = "linux", target_os = "macos"))]
+    {
+        use hbb_common::libc;
+
+        // Native runners bypass Rust's startup, which normally ignores SIGPIPE.
+        if unsafe { libc::signal(libc::SIGPIPE, libc::SIG_IGN) } == libc::SIG_ERR {
+            eprintln!("Failed to ignore SIGPIPE: {}", std::io::Error::last_os_error());
+            std::process::exit(1);
+        }
+    }
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
     if crate::core_main::core_main().is_some() {
         return true;