034eb4e724
When spawning a process, stdio file descriptors can be configured to be ignored, which basically means that they'll be closed. Currently this is done by literally closing the file descriptors in the child, but this can have adverse side effects if the child process then opens a new file descriptor, assigning it to a stdio number. To work around the problems of the child, this commit alters the process spawning code to map stdio fds to /dev/null on unix (and a similar equivalent on windows) when they are specified as being ignored. This should allow spawned programs to have more expected behavior when opening new files. Closes #14456
56 lines
1.4 KiB
Rust
56 lines
1.4 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(phase)]
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#[phase(syntax, link)]
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extern crate green;
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extern crate native;
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use std::io::process;
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use std::io::Command;
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use std::io;
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use std::os;
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green_start!(main)
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fn main() {
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let args = os::args();
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if args.len() > 1 && args.get(1).as_slice() == "child" {
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return child()
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}
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test();
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let (tx, rx) = channel();
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native::task::spawn(proc() {
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tx.send(test());
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});
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rx.recv();
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}
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fn child() {
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io::stdout().write_line("foo").unwrap();
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io::stderr().write_line("bar").unwrap();
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assert_eq!(io::stdin().read_line().err().unwrap().kind, io::EndOfFile);
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}
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fn test() {
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let args = os::args();
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let mut p = Command::new(args.get(0).as_slice()).arg("child")
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.stdin(process::Ignored)
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.stdout(process::Ignored)
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.stderr(process::Ignored)
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.spawn().unwrap();
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assert!(p.wait().unwrap().success());
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}
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