auto merge of #13158 : alexcrichton/rust/issue-13123, r=brson

Some unix platforms will send a SIGPIPE signal instead of returning EPIPE from a
syscall by default. The native runtime doesn't install a SIGPIPE handler,
causing the program to die immediately in this case. This brings the behavior in
line with libgreen by ignoring SIGPIPE and propagating EPIPE upwards to the
application in the form of an IoError.

Closes #13123

src/test/run-pass/sigpipe-should-be-ignored.rs

@@ -0,0 +1,36 @@
+// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// ignore-fast
+
+// Be sure that when a SIGPIPE would have been received that the entire process
+// doesn't die in a ball of fire, but rather it's gracefully handled.
+
+use std::os;
+use std::io::{PipeStream, Process};
+
+fn test() {
+    let os::Pipe { input, out } = os::pipe();
+    let input = PipeStream::open(input);
+    let mut out = PipeStream::open(out);
+    drop(input);
+
+    let _ = out.write([1]);
+}
+
+fn main() {
+    let args = os::args();
+    if args.len() > 1 && args[1].as_slice() == "test" {
+        return test();
+    }
+
+    let mut p = Process::new(args[0], [~"test"]).unwrap();
+    assert!(p.wait().success());
+}