1130 lines
34 KiB
Rust
1130 lines
34 KiB
Rust
// Copyright 2015 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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//! Working with processes.
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#![stable(feature = "process", since = "1.0.0")]
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use io::prelude::*;
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use ffi::OsStr;
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use fmt;
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use io;
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use path::Path;
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use str;
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use sys::pipe::{read2, AnonPipe};
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use sys::process as imp;
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use sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
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/// Representation of a running or exited child process.
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///
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/// This structure is used to represent and manage child processes. A child
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/// process is created via the [`Command`] struct, which configures the
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/// spawning process and can itself be constructed using a builder-style
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/// interface.
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///
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/// # Examples
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///
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/// ```should_panic
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/// use std::process::Command;
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///
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/// let mut child = Command::new("/bin/cat")
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/// .arg("file.txt")
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/// .spawn()
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/// .expect("failed to execute child");
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///
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/// let ecode = child.wait()
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/// .expect("failed to wait on child");
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///
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/// assert!(ecode.success());
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/// ```
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///
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/// # Note
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///
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/// Take note that there is no implementation of [`Drop`] for child processes,
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/// so if you do not ensure the `Child` has exited then it will continue to
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/// run, even after the `Child` handle to the child process has gone out of
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/// scope.
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///
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/// Calling [`wait`][`wait`] (or other functions that wrap around it) will make
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/// the parent process wait until the child has actually exited before
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/// continuing.
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///
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/// [`Command`]: struct.Command.html
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/// [`Drop`]: ../../core/ops/trait.Drop.html
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/// [`wait`]: #method.wait
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#[stable(feature = "process", since = "1.0.0")]
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pub struct Child {
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handle: imp::Process,
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/// The handle for writing to the child's stdin, if it has been captured
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#[stable(feature = "process", since = "1.0.0")]
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pub stdin: Option<ChildStdin>,
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/// The handle for reading from the child's stdout, if it has been captured
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#[stable(feature = "process", since = "1.0.0")]
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pub stdout: Option<ChildStdout>,
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/// The handle for reading from the child's stderr, if it has been captured
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#[stable(feature = "process", since = "1.0.0")]
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pub stderr: Option<ChildStderr>,
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}
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impl AsInner<imp::Process> for Child {
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fn as_inner(&self) -> &imp::Process { &self.handle }
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}
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impl FromInner<(imp::Process, imp::StdioPipes)> for Child {
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fn from_inner((handle, io): (imp::Process, imp::StdioPipes)) -> Child {
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Child {
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handle: handle,
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stdin: io.stdin.map(ChildStdin::from_inner),
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stdout: io.stdout.map(ChildStdout::from_inner),
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stderr: io.stderr.map(ChildStderr::from_inner),
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}
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}
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}
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impl IntoInner<imp::Process> for Child {
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fn into_inner(self) -> imp::Process { self.handle }
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}
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/// A handle to a child process's stdin. This struct is used in the [`stdin`]
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/// field on [`Child`].
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///
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/// [`Child`]: struct.Child.html
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/// [`stdin`]: struct.Child.html#structfield.stdin
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#[stable(feature = "process", since = "1.0.0")]
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pub struct ChildStdin {
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inner: AnonPipe
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}
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#[stable(feature = "process", since = "1.0.0")]
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impl Write for ChildStdin {
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fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
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self.inner.write(buf)
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}
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fn flush(&mut self) -> io::Result<()> {
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Ok(())
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}
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}
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impl AsInner<AnonPipe> for ChildStdin {
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fn as_inner(&self) -> &AnonPipe { &self.inner }
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}
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impl IntoInner<AnonPipe> for ChildStdin {
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fn into_inner(self) -> AnonPipe { self.inner }
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}
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impl FromInner<AnonPipe> for ChildStdin {
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fn from_inner(pipe: AnonPipe) -> ChildStdin {
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ChildStdin { inner: pipe }
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}
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}
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/// A handle to a child process's stdout. This struct is used in the [`stdout`]
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/// field on [`Child`].
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///
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/// [`Child`]: struct.Child.html
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/// [`stdout`]: struct.Child.html#structfield.stdout
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#[stable(feature = "process", since = "1.0.0")]
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pub struct ChildStdout {
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inner: AnonPipe
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}
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#[stable(feature = "process", since = "1.0.0")]
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impl Read for ChildStdout {
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fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
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self.inner.read(buf)
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}
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
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self.inner.read_to_end(buf)
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}
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}
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impl AsInner<AnonPipe> for ChildStdout {
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fn as_inner(&self) -> &AnonPipe { &self.inner }
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}
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impl IntoInner<AnonPipe> for ChildStdout {
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fn into_inner(self) -> AnonPipe { self.inner }
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}
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impl FromInner<AnonPipe> for ChildStdout {
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fn from_inner(pipe: AnonPipe) -> ChildStdout {
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ChildStdout { inner: pipe }
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}
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}
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/// A handle to a child process's stderr. This struct is used in the [`stderr`]
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/// field on [`Child`].
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///
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/// [`Child`]: struct.Child.html
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/// [`stderr`]: struct.Child.html#structfield.stderr
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#[stable(feature = "process", since = "1.0.0")]
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pub struct ChildStderr {
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inner: AnonPipe
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}
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#[stable(feature = "process", since = "1.0.0")]
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impl Read for ChildStderr {
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fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
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self.inner.read(buf)
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}
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
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self.inner.read_to_end(buf)
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}
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}
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impl AsInner<AnonPipe> for ChildStderr {
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fn as_inner(&self) -> &AnonPipe { &self.inner }
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}
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impl IntoInner<AnonPipe> for ChildStderr {
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fn into_inner(self) -> AnonPipe { self.inner }
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}
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impl FromInner<AnonPipe> for ChildStderr {
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fn from_inner(pipe: AnonPipe) -> ChildStderr {
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ChildStderr { inner: pipe }
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}
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}
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/// A process builder, providing fine-grained control
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/// over how a new process should be spawned.
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///
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/// A default configuration can be
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/// generated using `Command::new(program)`, where `program` gives a path to the
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/// program to be executed. Additional builder methods allow the configuration
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/// to be changed (for example, by adding arguments) prior to spawning:
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///
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/// ```
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/// use std::process::Command;
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///
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/// let output = Command::new("sh")
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/// .arg("-c")
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/// .arg("echo hello")
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/// .output()
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/// .expect("failed to execute process");
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///
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/// let hello = output.stdout;
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub struct Command {
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inner: imp::Command,
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}
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impl Command {
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/// Constructs a new `Command` for launching the program at
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/// path `program`, with the following default configuration:
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///
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/// * No arguments to the program
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/// * Inherit the current process's environment
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/// * Inherit the current process's working directory
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/// * Inherit stdin/stdout/stderr for `spawn` or `status`, but create pipes for `output`
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///
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/// Builder methods are provided to change these defaults and
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/// otherwise configure the process.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("sh")
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/// .spawn()
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/// .expect("sh command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn new<S: AsRef<OsStr>>(program: S) -> Command {
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Command { inner: imp::Command::new(program.as_ref()) }
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}
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/// Add an argument to pass to the program.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("ls")
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/// .arg("-l")
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/// .arg("-a")
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn arg<S: AsRef<OsStr>>(&mut self, arg: S) -> &mut Command {
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self.inner.arg(arg.as_ref());
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self
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}
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/// Add multiple arguments to pass to the program.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("ls")
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/// .args(&["-l", "-a"])
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn args<S: AsRef<OsStr>>(&mut self, args: &[S]) -> &mut Command {
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for arg in args {
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self.arg(arg.as_ref());
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}
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self
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}
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/// Inserts or updates an environment variable mapping.
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///
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/// Note that environment variable names are case-insensitive (but case-preserving) on Windows,
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/// and case-sensitive on all other platforms.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("ls")
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/// .env("PATH", "/bin")
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn env<K, V>(&mut self, key: K, val: V) -> &mut Command
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where K: AsRef<OsStr>, V: AsRef<OsStr>
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{
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self.inner.env(key.as_ref(), val.as_ref());
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self
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}
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/// Removes an environment variable mapping.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("ls")
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/// .env_remove("PATH")
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn env_remove<K: AsRef<OsStr>>(&mut self, key: K) -> &mut Command {
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self.inner.env_remove(key.as_ref());
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self
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}
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/// Clears the entire environment map for the child process.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("ls")
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/// .env_clear()
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn env_clear(&mut self) -> &mut Command {
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self.inner.env_clear();
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self
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}
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/// Sets the working directory for the child process.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("ls")
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/// .current_dir("/bin")
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn current_dir<P: AsRef<Path>>(&mut self, dir: P) -> &mut Command {
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self.inner.cwd(dir.as_ref().as_ref());
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self
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}
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/// Configuration for the child process's stdin handle (file descriptor 0).
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::{Command, Stdio};
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///
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/// Command::new("ls")
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/// .stdin(Stdio::null())
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn stdin(&mut self, cfg: Stdio) -> &mut Command {
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self.inner.stdin(cfg.0);
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self
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}
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/// Configuration for the child process's stdout handle (file descriptor 1).
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::{Command, Stdio};
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///
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/// Command::new("ls")
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/// .stdout(Stdio::null())
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn stdout(&mut self, cfg: Stdio) -> &mut Command {
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self.inner.stdout(cfg.0);
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self
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}
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/// Configuration for the child process's stderr handle (file descriptor 2).
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::{Command, Stdio};
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///
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/// Command::new("ls")
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/// .stderr(Stdio::null())
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn stderr(&mut self, cfg: Stdio) -> &mut Command {
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self.inner.stderr(cfg.0);
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self
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}
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/// Executes the command as a child process, returning a handle to it.
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///
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/// By default, stdin, stdout and stderr are inherited from the parent.
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///
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/// # Examples
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///
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/// Basic usage:
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///
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/// ```no_run
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/// use std::process::Command;
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///
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/// Command::new("ls")
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/// .spawn()
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/// .expect("ls command failed to start");
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn spawn(&mut self) -> io::Result<Child> {
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self.inner.spawn(imp::Stdio::Inherit, true).map(Child::from_inner)
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}
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/// Executes the command as a child process, waiting for it to finish and
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/// collecting all of its output.
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///
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/// By default, stdin, stdout and stderr are captured (and used to
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/// provide the resulting output).
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///
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/// # Examples
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///
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/// ```should_panic
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/// use std::process::Command;
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/// let output = Command::new("/bin/cat")
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/// .arg("file.txt")
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/// .output()
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/// .expect("failed to execute process");
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///
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/// println!("status: {}", output.status);
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/// println!("stdout: {}", String::from_utf8_lossy(&output.stdout));
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/// println!("stderr: {}", String::from_utf8_lossy(&output.stderr));
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///
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/// assert!(output.status.success());
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn output(&mut self) -> io::Result<Output> {
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self.inner.spawn(imp::Stdio::MakePipe, false).map(Child::from_inner)
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.and_then(|p| p.wait_with_output())
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}
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/// Executes a command as a child process, waiting for it to finish and
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/// collecting its exit status.
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///
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/// By default, stdin, stdout and stderr are inherited from the parent.
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///
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/// # Examples
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///
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/// ```should_panic
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/// use std::process::Command;
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///
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/// let status = Command::new("/bin/cat")
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/// .arg("file.txt")
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/// .status()
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/// .expect("failed to execute process");
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///
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/// println!("process exited with: {}", status);
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///
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/// assert!(status.success());
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/// ```
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#[stable(feature = "process", since = "1.0.0")]
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pub fn status(&mut self) -> io::Result<ExitStatus> {
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self.inner.spawn(imp::Stdio::Inherit, true).map(Child::from_inner)
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.and_then(|mut p| p.wait())
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}
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}
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|
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#[stable(feature = "rust1", since = "1.0.0")]
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impl fmt::Debug for Command {
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/// Format the program and arguments of a Command for display. Any
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/// non-utf8 data is lossily converted using the utf8 replacement
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/// character.
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.inner.fmt(f)
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}
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}
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impl AsInner<imp::Command> for Command {
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fn as_inner(&self) -> &imp::Command { &self.inner }
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}
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impl AsInnerMut<imp::Command> for Command {
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fn as_inner_mut(&mut self) -> &mut imp::Command { &mut self.inner }
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}
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/// The output of a finished process.
|
|
#[derive(PartialEq, Eq, Clone)]
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub struct Output {
|
|
/// The status (exit code) of the process.
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub status: ExitStatus,
|
|
/// The data that the process wrote to stdout.
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub stdout: Vec<u8>,
|
|
/// The data that the process wrote to stderr.
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub stderr: Vec<u8>,
|
|
}
|
|
|
|
// If either stderr or stdout are valid utf8 strings it prints the valid
|
|
// strings, otherwise it prints the byte sequence instead
|
|
#[stable(feature = "process_output_debug", since = "1.7.0")]
|
|
impl fmt::Debug for Output {
|
|
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
|
|
|
|
let stdout_utf8 = str::from_utf8(&self.stdout);
|
|
let stdout_debug: &fmt::Debug = match stdout_utf8 {
|
|
Ok(ref str) => str,
|
|
Err(_) => &self.stdout
|
|
};
|
|
|
|
let stderr_utf8 = str::from_utf8(&self.stderr);
|
|
let stderr_debug: &fmt::Debug = match stderr_utf8 {
|
|
Ok(ref str) => str,
|
|
Err(_) => &self.stderr
|
|
};
|
|
|
|
fmt.debug_struct("Output")
|
|
.field("status", &self.status)
|
|
.field("stdout", stdout_debug)
|
|
.field("stderr", stderr_debug)
|
|
.finish()
|
|
}
|
|
}
|
|
|
|
/// Describes what to do with a standard I/O stream for a child process.
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub struct Stdio(imp::Stdio);
|
|
|
|
impl Stdio {
|
|
/// A new pipe should be arranged to connect the parent and child processes.
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn piped() -> Stdio { Stdio(imp::Stdio::MakePipe) }
|
|
|
|
/// The child inherits from the corresponding parent descriptor.
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn inherit() -> Stdio { Stdio(imp::Stdio::Inherit) }
|
|
|
|
/// This stream will be ignored. This is the equivalent of attaching the
|
|
/// stream to `/dev/null`
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn null() -> Stdio { Stdio(imp::Stdio::Null) }
|
|
}
|
|
|
|
impl FromInner<imp::Stdio> for Stdio {
|
|
fn from_inner(inner: imp::Stdio) -> Stdio {
|
|
Stdio(inner)
|
|
}
|
|
}
|
|
|
|
/// Describes the result of a process after it has terminated.
|
|
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub struct ExitStatus(imp::ExitStatus);
|
|
|
|
impl ExitStatus {
|
|
/// Was termination successful? Signal termination not considered a success,
|
|
/// and success is defined as a zero exit status.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```rust,no_run
|
|
/// use std::process::Command;
|
|
///
|
|
/// let status = Command::new("mkdir")
|
|
/// .arg("projects")
|
|
/// .status()
|
|
/// .expect("failed to execute mkdir");
|
|
///
|
|
/// if status.success() {
|
|
/// println!("'projects/' directory created");
|
|
/// } else {
|
|
/// println!("failed to create 'projects/' directory");
|
|
/// }
|
|
/// ```
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn success(&self) -> bool {
|
|
self.0.success()
|
|
}
|
|
|
|
/// Returns the exit code of the process, if any.
|
|
///
|
|
/// On Unix, this will return `None` if the process was terminated
|
|
/// by a signal; `std::os::unix` provides an extension trait for
|
|
/// extracting the signal and other details from the `ExitStatus`.
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn code(&self) -> Option<i32> {
|
|
self.0.code()
|
|
}
|
|
}
|
|
|
|
impl AsInner<imp::ExitStatus> for ExitStatus {
|
|
fn as_inner(&self) -> &imp::ExitStatus { &self.0 }
|
|
}
|
|
|
|
impl FromInner<imp::ExitStatus> for ExitStatus {
|
|
fn from_inner(s: imp::ExitStatus) -> ExitStatus {
|
|
ExitStatus(s)
|
|
}
|
|
}
|
|
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
impl fmt::Display for ExitStatus {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
self.0.fmt(f)
|
|
}
|
|
}
|
|
|
|
impl Child {
|
|
/// Forces the child to exit. This is equivalent to sending a
|
|
/// SIGKILL on unix platforms.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// Basic usage:
|
|
///
|
|
/// ```no_run
|
|
/// use std::process::Command;
|
|
///
|
|
/// let mut command = Command::new("yes");
|
|
/// if let Ok(mut child) = command.spawn() {
|
|
/// child.kill().expect("command wasn't running");
|
|
/// } else {
|
|
/// println!("yes command didn't start");
|
|
/// }
|
|
/// ```
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn kill(&mut self) -> io::Result<()> {
|
|
self.handle.kill()
|
|
}
|
|
|
|
/// Returns the OS-assigned process identifier associated with this child.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// Basic usage:
|
|
///
|
|
/// ```no_run
|
|
/// use std::process::Command;
|
|
///
|
|
/// let mut command = Command::new("ls");
|
|
/// if let Ok(child) = command.spawn() {
|
|
/// println!("Child's id is {}", child.id());
|
|
/// } else {
|
|
/// println!("ls command didn't start");
|
|
/// }
|
|
/// ```
|
|
#[stable(feature = "process_id", since = "1.3.0")]
|
|
pub fn id(&self) -> u32 {
|
|
self.handle.id()
|
|
}
|
|
|
|
/// Waits for the child to exit completely, returning the status that it
|
|
/// exited with. This function will continue to have the same return value
|
|
/// after it has been called at least once.
|
|
///
|
|
/// The stdin handle to the child process, if any, will be closed
|
|
/// before waiting. This helps avoid deadlock: it ensures that the
|
|
/// child does not block waiting for input from the parent, while
|
|
/// the parent waits for the child to exit.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// Basic usage:
|
|
///
|
|
/// ```no_run
|
|
/// use std::process::Command;
|
|
///
|
|
/// let mut command = Command::new("ls");
|
|
/// if let Ok(mut child) = command.spawn() {
|
|
/// child.wait().expect("command wasn't running");
|
|
/// println!("Child has finished its execution!");
|
|
/// } else {
|
|
/// println!("ls command didn't start");
|
|
/// }
|
|
/// ```
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn wait(&mut self) -> io::Result<ExitStatus> {
|
|
drop(self.stdin.take());
|
|
self.handle.wait().map(ExitStatus)
|
|
}
|
|
|
|
/// Simultaneously waits for the child to exit and collect all remaining
|
|
/// output on the stdout/stderr handles, returning an `Output`
|
|
/// instance.
|
|
///
|
|
/// The stdin handle to the child process, if any, will be closed
|
|
/// before waiting. This helps avoid deadlock: it ensures that the
|
|
/// child does not block waiting for input from the parent, while
|
|
/// the parent waits for the child to exit.
|
|
///
|
|
/// By default, stdin, stdout and stderr are inherited from the parent.
|
|
/// In order to capture the output into this `Result<Output>` it is
|
|
/// necessary to create new pipes between parent and child. Use
|
|
/// `stdout(Stdio::piped())` or `stderr(Stdio::piped())`, respectively.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```should_panic
|
|
/// use std::process::{Command, Stdio};
|
|
///
|
|
/// let child = Command::new("/bin/cat")
|
|
/// .arg("file.txt")
|
|
/// .stdout(Stdio::piped())
|
|
/// .spawn()
|
|
/// .expect("failed to execute child");
|
|
///
|
|
/// let output = child
|
|
/// .wait_with_output()
|
|
/// .expect("failed to wait on child");
|
|
///
|
|
/// assert!(output.status.success());
|
|
/// ```
|
|
///
|
|
#[stable(feature = "process", since = "1.0.0")]
|
|
pub fn wait_with_output(mut self) -> io::Result<Output> {
|
|
drop(self.stdin.take());
|
|
|
|
let (mut stdout, mut stderr) = (Vec::new(), Vec::new());
|
|
match (self.stdout.take(), self.stderr.take()) {
|
|
(None, None) => {}
|
|
(Some(mut out), None) => {
|
|
let res = out.read_to_end(&mut stdout);
|
|
res.unwrap();
|
|
}
|
|
(None, Some(mut err)) => {
|
|
let res = err.read_to_end(&mut stderr);
|
|
res.unwrap();
|
|
}
|
|
(Some(out), Some(err)) => {
|
|
let res = read2(out.inner, &mut stdout, err.inner, &mut stderr);
|
|
res.unwrap();
|
|
}
|
|
}
|
|
|
|
let status = self.wait()?;
|
|
Ok(Output {
|
|
status: status,
|
|
stdout: stdout,
|
|
stderr: stderr,
|
|
})
|
|
}
|
|
}
|
|
|
|
/// Terminates the current process with the specified exit code.
|
|
///
|
|
/// This function will never return and will immediately terminate the current
|
|
/// process. The exit code is passed through to the underlying OS and will be
|
|
/// available for consumption by another process.
|
|
///
|
|
/// Note that because this function never returns, and that it terminates the
|
|
/// process, no destructors on the current stack or any other thread's stack
|
|
/// will be run. If a clean shutdown is needed it is recommended to only call
|
|
/// this function at a known point where there are no more destructors left
|
|
/// to run.
|
|
#[stable(feature = "rust1", since = "1.0.0")]
|
|
pub fn exit(code: i32) -> ! {
|
|
::sys_common::cleanup();
|
|
::sys::os::exit(code)
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use io::prelude::*;
|
|
|
|
use io::ErrorKind;
|
|
use str;
|
|
use super::{Command, Output, Stdio};
|
|
|
|
// FIXME(#10380) these tests should not all be ignored on android.
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn smoke() {
|
|
let p = Command::new("true").spawn();
|
|
assert!(p.is_ok());
|
|
let mut p = p.unwrap();
|
|
assert!(p.wait().unwrap().success());
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn smoke_failure() {
|
|
match Command::new("if-this-is-a-binary-then-the-world-has-ended").spawn() {
|
|
Ok(..) => panic!(),
|
|
Err(..) => {}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn exit_reported_right() {
|
|
let p = Command::new("false").spawn();
|
|
assert!(p.is_ok());
|
|
let mut p = p.unwrap();
|
|
assert!(p.wait().unwrap().code() == Some(1));
|
|
drop(p.wait());
|
|
}
|
|
|
|
#[test]
|
|
#[cfg(unix)]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn signal_reported_right() {
|
|
use os::unix::process::ExitStatusExt;
|
|
|
|
let mut p = Command::new("/bin/sh")
|
|
.arg("-c").arg("read a")
|
|
.stdin(Stdio::piped())
|
|
.spawn().unwrap();
|
|
p.kill().unwrap();
|
|
match p.wait().unwrap().signal() {
|
|
Some(9) => {},
|
|
result => panic!("not terminated by signal 9 (instead, {:?})",
|
|
result),
|
|
}
|
|
}
|
|
|
|
pub fn run_output(mut cmd: Command) -> String {
|
|
let p = cmd.spawn();
|
|
assert!(p.is_ok());
|
|
let mut p = p.unwrap();
|
|
assert!(p.stdout.is_some());
|
|
let mut ret = String::new();
|
|
p.stdout.as_mut().unwrap().read_to_string(&mut ret).unwrap();
|
|
assert!(p.wait().unwrap().success());
|
|
return ret;
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn stdout_works() {
|
|
let mut cmd = Command::new("echo");
|
|
cmd.arg("foobar").stdout(Stdio::piped());
|
|
assert_eq!(run_output(cmd), "foobar\n");
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(any(windows, target_os = "android"), ignore)]
|
|
fn set_current_dir_works() {
|
|
let mut cmd = Command::new("/bin/sh");
|
|
cmd.arg("-c").arg("pwd")
|
|
.current_dir("/")
|
|
.stdout(Stdio::piped());
|
|
assert_eq!(run_output(cmd), "/\n");
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(any(windows, target_os = "android"), ignore)]
|
|
fn stdin_works() {
|
|
let mut p = Command::new("/bin/sh")
|
|
.arg("-c").arg("read line; echo $line")
|
|
.stdin(Stdio::piped())
|
|
.stdout(Stdio::piped())
|
|
.spawn().unwrap();
|
|
p.stdin.as_mut().unwrap().write("foobar".as_bytes()).unwrap();
|
|
drop(p.stdin.take());
|
|
let mut out = String::new();
|
|
p.stdout.as_mut().unwrap().read_to_string(&mut out).unwrap();
|
|
assert!(p.wait().unwrap().success());
|
|
assert_eq!(out, "foobar\n");
|
|
}
|
|
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
#[cfg(unix)]
|
|
fn uid_works() {
|
|
use os::unix::prelude::*;
|
|
use libc;
|
|
let mut p = Command::new("/bin/sh")
|
|
.arg("-c").arg("true")
|
|
.uid(unsafe { libc::getuid() })
|
|
.gid(unsafe { libc::getgid() })
|
|
.spawn().unwrap();
|
|
assert!(p.wait().unwrap().success());
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
#[cfg(unix)]
|
|
fn uid_to_root_fails() {
|
|
use os::unix::prelude::*;
|
|
use libc;
|
|
|
|
// if we're already root, this isn't a valid test. Most of the bots run
|
|
// as non-root though (android is an exception).
|
|
if unsafe { libc::getuid() == 0 } { return }
|
|
assert!(Command::new("/bin/ls").uid(0).gid(0).spawn().is_err());
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn test_process_status() {
|
|
let mut status = Command::new("false").status().unwrap();
|
|
assert!(status.code() == Some(1));
|
|
|
|
status = Command::new("true").status().unwrap();
|
|
assert!(status.success());
|
|
}
|
|
|
|
#[test]
|
|
fn test_process_output_fail_to_start() {
|
|
match Command::new("/no-binary-by-this-name-should-exist").output() {
|
|
Err(e) => assert_eq!(e.kind(), ErrorKind::NotFound),
|
|
Ok(..) => panic!()
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn test_process_output_output() {
|
|
let Output {status, stdout, stderr}
|
|
= Command::new("echo").arg("hello").output().unwrap();
|
|
let output_str = str::from_utf8(&stdout).unwrap();
|
|
|
|
assert!(status.success());
|
|
assert_eq!(output_str.trim().to_string(), "hello");
|
|
assert_eq!(stderr, Vec::new());
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn test_process_output_error() {
|
|
let Output {status, stdout, stderr}
|
|
= Command::new("mkdir").arg(".").output().unwrap();
|
|
|
|
assert!(status.code() == Some(1));
|
|
assert_eq!(stdout, Vec::new());
|
|
assert!(!stderr.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn test_finish_once() {
|
|
let mut prog = Command::new("false").spawn().unwrap();
|
|
assert!(prog.wait().unwrap().code() == Some(1));
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn test_finish_twice() {
|
|
let mut prog = Command::new("false").spawn().unwrap();
|
|
assert!(prog.wait().unwrap().code() == Some(1));
|
|
assert!(prog.wait().unwrap().code() == Some(1));
|
|
}
|
|
|
|
#[test]
|
|
#[cfg_attr(target_os = "android", ignore)]
|
|
fn test_wait_with_output_once() {
|
|
let prog = Command::new("echo").arg("hello").stdout(Stdio::piped())
|
|
.spawn().unwrap();
|
|
let Output {status, stdout, stderr} = prog.wait_with_output().unwrap();
|
|
let output_str = str::from_utf8(&stdout).unwrap();
|
|
|
|
assert!(status.success());
|
|
assert_eq!(output_str.trim().to_string(), "hello");
|
|
assert_eq!(stderr, Vec::new());
|
|
}
|
|
|
|
#[cfg(all(unix, not(target_os="android")))]
|
|
pub fn env_cmd() -> Command {
|
|
Command::new("env")
|
|
}
|
|
#[cfg(target_os="android")]
|
|
pub fn env_cmd() -> Command {
|
|
let mut cmd = Command::new("/system/bin/sh");
|
|
cmd.arg("-c").arg("set");
|
|
cmd
|
|
}
|
|
|
|
#[cfg(windows)]
|
|
pub fn env_cmd() -> Command {
|
|
let mut cmd = Command::new("cmd");
|
|
cmd.arg("/c").arg("set");
|
|
cmd
|
|
}
|
|
|
|
#[test]
|
|
fn test_inherit_env() {
|
|
use env;
|
|
|
|
let result = env_cmd().output().unwrap();
|
|
let output = String::from_utf8(result.stdout).unwrap();
|
|
|
|
for (ref k, ref v) in env::vars() {
|
|
// don't check android RANDOM variables
|
|
if cfg!(target_os = "android") && *k == "RANDOM" {
|
|
continue
|
|
}
|
|
|
|
// Windows has hidden environment variables whose names start with
|
|
// equals signs (`=`). Those do not show up in the output of the
|
|
// `set` command.
|
|
assert!((cfg!(windows) && k.starts_with("=")) ||
|
|
k.starts_with("DYLD") ||
|
|
output.contains(&format!("{}={}", *k, *v)) ||
|
|
output.contains(&format!("{}='{}'", *k, *v)),
|
|
"output doesn't contain `{}={}`\n{}",
|
|
k, v, output);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_override_env() {
|
|
use env;
|
|
|
|
// In some build environments (such as chrooted Nix builds), `env` can
|
|
// only be found in the explicitly-provided PATH env variable, not in
|
|
// default places such as /bin or /usr/bin. So we need to pass through
|
|
// PATH to our sub-process.
|
|
let mut cmd = env_cmd();
|
|
cmd.env_clear().env("RUN_TEST_NEW_ENV", "123");
|
|
if let Some(p) = env::var_os("PATH") {
|
|
cmd.env("PATH", &p);
|
|
}
|
|
let result = cmd.output().unwrap();
|
|
let output = String::from_utf8_lossy(&result.stdout).to_string();
|
|
|
|
assert!(output.contains("RUN_TEST_NEW_ENV=123"),
|
|
"didn't find RUN_TEST_NEW_ENV inside of:\n\n{}", output);
|
|
}
|
|
|
|
#[test]
|
|
fn test_add_to_env() {
|
|
let result = env_cmd().env("RUN_TEST_NEW_ENV", "123").output().unwrap();
|
|
let output = String::from_utf8_lossy(&result.stdout).to_string();
|
|
|
|
assert!(output.contains("RUN_TEST_NEW_ENV=123"),
|
|
"didn't find RUN_TEST_NEW_ENV inside of:\n\n{}", output);
|
|
}
|
|
|
|
// Regression tests for #30858.
|
|
#[test]
|
|
fn test_interior_nul_in_progname_is_error() {
|
|
match Command::new("has-some-\0\0s-inside").spawn() {
|
|
Err(e) => assert_eq!(e.kind(), ErrorKind::InvalidInput),
|
|
Ok(_) => panic!(),
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_interior_nul_in_arg_is_error() {
|
|
match Command::new("echo").arg("has-some-\0\0s-inside").spawn() {
|
|
Err(e) => assert_eq!(e.kind(), ErrorKind::InvalidInput),
|
|
Ok(_) => panic!(),
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_interior_nul_in_args_is_error() {
|
|
match Command::new("echo").args(&["has-some-\0\0s-inside"]).spawn() {
|
|
Err(e) => assert_eq!(e.kind(), ErrorKind::InvalidInput),
|
|
Ok(_) => panic!(),
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_interior_nul_in_current_dir_is_error() {
|
|
match Command::new("echo").current_dir("has-some-\0\0s-inside").spawn() {
|
|
Err(e) => assert_eq!(e.kind(), ErrorKind::InvalidInput),
|
|
Ok(_) => panic!(),
|
|
}
|
|
}
|
|
|
|
// Regression tests for #30862.
|
|
#[test]
|
|
fn test_interior_nul_in_env_key_is_error() {
|
|
match env_cmd().env("has-some-\0\0s-inside", "value").spawn() {
|
|
Err(e) => assert_eq!(e.kind(), ErrorKind::InvalidInput),
|
|
Ok(_) => panic!(),
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_interior_nul_in_env_value_is_error() {
|
|
match env_cmd().env("key", "has-some-\0\0s-inside").spawn() {
|
|
Err(e) => assert_eq!(e.kind(), ErrorKind::InvalidInput),
|
|
Ok(_) => panic!(),
|
|
}
|
|
}
|
|
}
|