046062d3bf
The existing APIs for spawning processes took strings for the command and arguments, but the underlying system may not impose utf8 encoding, so this is overly limiting. The assumption we actually want to make is just that the command and arguments are viewable as [u8] slices with no interior NULLs, i.e., as CStrings. The ToCStr trait is a handy bound for types that meet this requirement (such as &str and Path). However, since the commands and arguments are often a mixture of strings and paths, it would be inconvenient to take a slice with a single T: ToCStr bound. So this patch revamps the process creation API to instead use a builder-style interface, called `Command`, allowing arguments to be added one at a time with differing ToCStr implementations for each. The initial cut of the builder API has some drawbacks that can be addressed once issue #13851 (libstd as a facade) is closed. These are detailed as FIXMEs. Closes #11650. [breaking-change]
56 lines
1.8 KiB
Rust
56 lines
1.8 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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// ignore-win32
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// ignore-android
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// This test ensures that the 'detach' field on processes does the right thing.
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// By detaching the child process, they should be put into a separate process
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// group. We test this by spawning a detached process, then killing our own
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// group with a signal.
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//
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// Note that the first thing we do is put ourselves in our own process group so
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// we don't interfere with other running tests.
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extern crate green;
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extern crate rustuv;
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extern crate libc;
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use std::io::process;
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use std::io::process::Command;
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use std::io::signal::{Listener, Interrupt};
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#[start]
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fn start(argc: int, argv: **u8) -> int {
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green::start(argc, argv, rustuv::event_loop, main)
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}
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fn main() {
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unsafe { libc::setsid(); }
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// we shouldn't die because of an interrupt
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let mut l = Listener::new();
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l.register(Interrupt).unwrap();
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// spawn the child
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let mut p = Command::new("/bin/sh").arg("-c").arg("read a").detached().spawn().unwrap();
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// send an interrupt to everyone in our process group
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unsafe { libc::funcs::posix88::signal::kill(0, libc::SIGINT); }
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// Wait for the child process to die (terminate it's stdin and the read
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// should fail).
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drop(p.stdin.take());
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match p.wait().unwrap() {
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process::ExitStatus(..) => {}
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process::ExitSignal(..) => fail!()
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}
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}
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