Set MSG_NOSIGNAL for UnixSteam

#139956

Author: mlowicki

Diff for: library/std/src/os/unix/net/stream.rs

@@ -23,6 +23,35 @@ use crate::sys::cvt;
 use crate::sys::net::Socket;
 use crate::sys_common::{AsInner, FromInner};
 use crate::time::Duration;
+use crate::cmp;
+#[cfg(any(
+    target_os = "linux",
+    target_os = "android",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "openbsd",
+    target_os = "netbsd",
+    target_os = "solaris",
+    target_os = "illumos",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "cygwin"
+))]
+use libc::MSG_NOSIGNAL;
+#[cfg(not(any(
+    target_os = "linux",
+    target_os = "android",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "openbsd",
+    target_os = "netbsd",
+    target_os = "solaris",
+    target_os = "illumos",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "cygwin"
+)))]
+const MSG_NOSIGNAL: core::ffi::c_int = 0x0;
 
 /// A Unix stream socket.
 ///
@@ -633,7 +662,11 @@ impl io::Write for UnixStream {
 #[stable(feature = "unix_socket", since = "1.10.0")]
 impl<'a> io::Write for &'a UnixStream {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.0.write(buf)
+        let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t; 
+        let ret = cvt(unsafe { 
+            c::send(self.0.as_raw(), buf.as_ptr() as *const c_void, len, MSG_NOSIGNAL) 
+         })?; 
+         Ok(ret as usize) 
     }
 
     fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {