use MSG_NOSIGNAL from liblibc

Author: kali

src/liblibc

@@ -43,7 +43,7 @@ use sys::net::netc::IPV6_LEAVE_GROUP as IPV6_DROP_MEMBERSHIP;
 use sys::net::netc::IPV6_DROP_MEMBERSHIP;
 
 #[cfg(target_os = "linux")]
-const MSG_NOSIGNAL: c_int = 0x4000;
+use libc::MSG_NOSIGNAL;
 #[cfg(not(target_os = "linux"))]
 const MSG_NOSIGNAL: c_int = 0x0; // unused dummy value
 
@@ -226,12 +226,11 @@ impl TcpStream {
 
     pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
         let len = cmp::min(buf.len(), <wrlen_t>::max_value() as usize) as wrlen_t;
-        let flags = if cfg!(target_os = "linux") { MSG_NOSIGNAL } else { 0 };
         let ret = cvt(unsafe {
             c::send(*self.inner.as_inner(),
                     buf.as_ptr() as *const c_void,
                     len,
-                    flags)
+                    MSG_NOSIGNAL)
         })?;
         Ok(ret as usize)
     }
@@ -452,11 +451,10 @@ impl UdpSocket {
     pub fn send_to(&self, buf: &[u8], dst: &SocketAddr) -> io::Result<usize> {
         let len = cmp::min(buf.len(), <wrlen_t>::max_value() as usize) as wrlen_t;
         let (dstp, dstlen) = dst.into_inner();
-        let flags = if cfg!(target_os = "linux") { MSG_NOSIGNAL } else { 0 };
         let ret = cvt(unsafe {
             c::sendto(*self.inner.as_inner(),
                       buf.as_ptr() as *const c_void, len,
-                      flags, dstp, dstlen)
+                      MSG_NOSIGNAL, dstp, dstlen)
         })?;
         Ok(ret as usize)
     }
@@ -576,12 +574,11 @@ impl UdpSocket {
 
     pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
         let len = cmp::min(buf.len(), <wrlen_t>::max_value() as usize) as wrlen_t;
-        let flags = if cfg!(target_os = "linux") { MSG_NOSIGNAL } else { 0 };
         let ret = cvt(unsafe {
             c::send(*self.inner.as_inner(),
                     buf.as_ptr() as *const c_void,
                     len,
-                    flags)
+                    MSG_NOSIGNAL)
         })?;
         Ok(ret as usize)
     }

src/libstd/sys/common/net.rs

@@ -29,7 +29,7 @@ use sys::net::Socket;
 use sys_common::{AsInner, FromInner, IntoInner};
 
 #[cfg(target_os = "linux")]
-const MSG_NOSIGNAL: libc::c_int = 0x4000;
+use libc::MSG_NOSIGNAL;
 #[cfg(not(target_os = "linux"))]
 const MSG_NOSIGNAL: libc::c_int = 0x0; // unused dummy value
 
@@ -691,12 +691,11 @@ impl UnixDatagram {
         fn inner(d: &UnixDatagram, buf: &[u8], path: &Path) -> io::Result<usize> {
             unsafe {
                 let (addr, len) = sockaddr_un(path)?;
-                let flags = if cfg!(target_os = "linux") { MSG_NOSIGNAL } else { 0 };
 
                 let count = cvt(libc::sendto(*d.0.as_inner(),
                                              buf.as_ptr() as *const _,
                                              buf.len(),
-                                             flags,
+                                             MSG_NOSIGNAL,
                                              &addr as *const _ as *const _,
                                              len))?;
                 Ok(count as usize)