Delete ctr-std to use my fork of the rust repo instead

1 files changed, 0 insertions, 1990 deletions

diff --git a/ctr-std/src/process.rs b/ctr-std/src/process.rs
deleted file mode 100644
index 9dd0767..0000000
--- a/ctr-std/src/process.rs
+++ /dev/null
@@ -1,1990 +0,0 @@
-// Copyright 2015 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.
-
-//! A module for working with processes.
-//!
-//! This module is mostly concerned with spawning and interacting with child
-//! processes, but it also provides [`abort`] and [`exit`] for terminating the
-//! current process.
-//!
-//! # Spawning a process
-//!
-//! The [`Command`] struct is used to configure and spawn processes:
-//!
-//! ```
-//! use std::process::Command;
-//!
-//! let output = Command::new("echo")
-//!                      .arg("Hello world")
-//!                      .output()
-//!                      .expect("Failed to execute command");
-//!
-//! assert_eq!(b"Hello world\n", output.stdout.as_slice());
-//! ```
-//!
-//! Several methods on [`Command`], such as [`spawn`] or [`output`], can be used
-//! to spawn a process. In particular, [`output`] spawns the child process and
-//! waits until the process terminates, while [`spawn`] will return a [`Child`]
-//! that represents the spawned child process.
-//!
-//! # Handling I/O
-//!
-//! The [`stdout`], [`stdin`], and [`stderr`] of a child process can be
-//! configured by passing an [`Stdio`] to the corresponding method on
-//! [`Command`]. Once spawned, they can be accessed from the [`Child`]. For
-//! example, piping output from one command into another command can be done
-//! like so:
-//!
-//! ```no_run
-//! use std::process::{Command, Stdio};
-//!
-//! // stdout must be configured with `Stdio::piped` in order to use
-//! // `echo_child.stdout`
-//! let echo_child = Command::new("echo")
-//!     .arg("Oh no, a tpyo!")
-//!     .stdout(Stdio::piped())
-//!     .spawn()
-//!     .expect("Failed to start echo process");
-//!
-//! // Note that `echo_child` is moved here, but we won't be needing
-//! // `echo_child` anymore
-//! let echo_out = echo_child.stdout.expect("Failed to open echo stdout");
-//!
-//! let mut sed_child = Command::new("sed")
-//!     .arg("s/tpyo/typo/")
-//!     .stdin(Stdio::from(echo_out))
-//!     .stdout(Stdio::piped())
-//!     .spawn()
-//!     .expect("Failed to start sed process");
-//!
-//! let output = sed_child.wait_with_output().expect("Failed to wait on sed");
-//! assert_eq!(b"Oh no, a typo!\n", output.stdout.as_slice());
-//! ```
-//!
-//! Note that [`ChildStderr`] and [`ChildStdout`] implement [`Read`] and
-//! [`ChildStdin`] implements [`Write`]:
-//!
-//! ```no_run
-//! use std::process::{Command, Stdio};
-//! use std::io::Write;
-//!
-//! let mut child = Command::new("/bin/cat")
-//!     .stdin(Stdio::piped())
-//!     .stdout(Stdio::piped())
-//!     .spawn()
-//!     .expect("failed to execute child");
-//!
-//! {
-//!     // limited borrow of stdin
-//!     let stdin = child.stdin.as_mut().expect("failed to get stdin");
-//!     stdin.write_all(b"test").expect("failed to write to stdin");
-//! }
-//!
-//! let output = child
-//!     .wait_with_output()
-//!     .expect("failed to wait on child");
-//!
-//! assert_eq!(b"test", output.stdout.as_slice());
-//! ```
-//!
-//! [`abort`]: fn.abort.html
-//! [`exit`]: fn.exit.html
-//!
-//! [`Command`]: struct.Command.html
-//! [`spawn`]: struct.Command.html#method.spawn
-//! [`output`]: struct.Command.html#method.output
-//!
-//! [`Child`]: struct.Child.html
-//! [`ChildStdin`]: struct.ChildStdin.html
-//! [`ChildStdout`]: struct.ChildStdout.html
-//! [`ChildStderr`]: struct.ChildStderr.html
-//! [`Stdio`]: struct.Stdio.html
-//!
-//! [`stdout`]: struct.Command.html#method.stdout
-//! [`stdin`]: struct.Command.html#method.stdin
-//! [`stderr`]: struct.Command.html#method.stderr
-//!
-//! [`Write`]: ../io/trait.Write.html
-//! [`Read`]: ../io/trait.Read.html
-
-#![stable(feature = "process", since = "1.0.0")]
-
-use io::prelude::*;
-
-use ffi::OsStr;
-use fmt;
-use fs;
-use io::{self, Initializer};
-use path::Path;
-use str;
-use sys::pipe::{read2, AnonPipe};
-use sys::process as imp;
-use sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
-
-/// Representation of a running or exited child process.
-///
-/// This structure is used to represent and manage child processes. A child
-/// process is created via the [`Command`] struct, which configures the
-/// spawning process and can itself be constructed using a builder-style
-/// interface.
-///
-/// There is no implementation of [`Drop`] for child processes,
-/// so if you do not ensure the `Child` has exited then it will continue to
-/// run, even after the `Child` handle to the child process has gone out of
-/// scope.
-///
-/// Calling [`wait`](#method.wait) (or other functions that wrap around it) will make
-/// the parent process wait until the child has actually exited before
-/// continuing.
-///
-/// # Examples
-///
-/// ```should_panic
-/// use std::process::Command;
-///
-/// let mut child = Command::new("/bin/cat")
-///                         .arg("file.txt")
-///                         .spawn()
-///                         .expect("failed to execute child");
-///
-/// let ecode = child.wait()
-///                  .expect("failed to wait on child");
-///
-/// assert!(ecode.success());
-/// ```
-///
-/// [`Command`]: struct.Command.html
-/// [`Drop`]: ../../core/ops/trait.Drop.html
-/// [`wait`]: #method.wait
-#[stable(feature = "process", since = "1.0.0")]
-pub struct Child {
-    handle: imp::Process,
-
-    /// The handle for writing to the child's standard input (stdin), if it has
-    /// been captured.
-    #[stable(feature = "process", since = "1.0.0")]
-    pub stdin: Option<ChildStdin>,
-
-    /// The handle for reading from the child's standard output (stdout), if it
-    /// has been captured.
-    #[stable(feature = "process", since = "1.0.0")]
-    pub stdout: Option<ChildStdout>,
-
-    /// The handle for reading from the child's standard error (stderr), if it
-    /// has been captured.
-    #[stable(feature = "process", since = "1.0.0")]
-    pub stderr: Option<ChildStderr>,
-}
-
-impl AsInner<imp::Process> for Child {
-    fn as_inner(&self) -> &imp::Process { &self.handle }
-}
-
-impl FromInner<(imp::Process, imp::StdioPipes)> for Child {
-    fn from_inner((handle, io): (imp::Process, imp::StdioPipes)) -> Child {
-        Child {
-            handle,
-            stdin: io.stdin.map(ChildStdin::from_inner),
-            stdout: io.stdout.map(ChildStdout::from_inner),
-            stderr: io.stderr.map(ChildStderr::from_inner),
-        }
-    }
-}
-
-impl IntoInner<imp::Process> for Child {
-    fn into_inner(self) -> imp::Process { self.handle }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for Child {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_struct("Child")
-            .field("stdin", &self.stdin)
-            .field("stdout", &self.stdout)
-            .field("stderr", &self.stderr)
-            .finish()
-    }
-}
-
-/// A handle to a child process's standard input (stdin).
-///
-/// This struct is used in the [`stdin`] field on [`Child`].
-///
-/// When an instance of `ChildStdin` is [dropped], the `ChildStdin`'s underlying
-/// file handle will be closed. If the child process was blocked on input prior
-/// to being dropped, it will become unblocked after dropping.
-///
-/// [`Child`]: struct.Child.html
-/// [`stdin`]: struct.Child.html#structfield.stdin
-/// [dropped]: ../ops/trait.Drop.html
-#[stable(feature = "process", since = "1.0.0")]
-pub struct ChildStdin {
-    inner: AnonPipe
-}
-
-#[stable(feature = "process", since = "1.0.0")]
-impl Write for ChildStdin {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.inner.write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        Ok(())
-    }
-}
-
-impl AsInner<AnonPipe> for ChildStdin {
-    fn as_inner(&self) -> &AnonPipe { &self.inner }
-}
-
-impl IntoInner<AnonPipe> for ChildStdin {
-    fn into_inner(self) -> AnonPipe { self.inner }
-}
-
-impl FromInner<AnonPipe> for ChildStdin {
-    fn from_inner(pipe: AnonPipe) -> ChildStdin {
-        ChildStdin { inner: pipe }
-    }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for ChildStdin {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.pad("ChildStdin { .. }")
-    }
-}
-
-/// A handle to a child process's standard output (stdout).
-///
-/// This struct is used in the [`stdout`] field on [`Child`].
-///
-/// When an instance of `ChildStdout` is [dropped], the `ChildStdout`'s
-/// underlying file handle will be closed.
-///
-/// [`Child`]: struct.Child.html
-/// [`stdout`]: struct.Child.html#structfield.stdout
-/// [dropped]: ../ops/trait.Drop.html
-#[stable(feature = "process", since = "1.0.0")]
-pub struct ChildStdout {
-    inner: AnonPipe
-}
-
-#[stable(feature = "process", since = "1.0.0")]
-impl Read for ChildStdout {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        self.inner.read(buf)
-    }
-    #[inline]
-    unsafe fn initializer(&self) -> Initializer {
-        Initializer::nop()
-    }
-}
-
-impl AsInner<AnonPipe> for ChildStdout {
-    fn as_inner(&self) -> &AnonPipe { &self.inner }
-}
-
-impl IntoInner<AnonPipe> for ChildStdout {
-    fn into_inner(self) -> AnonPipe { self.inner }
-}
-
-impl FromInner<AnonPipe> for ChildStdout {
-    fn from_inner(pipe: AnonPipe) -> ChildStdout {
-        ChildStdout { inner: pipe }
-    }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for ChildStdout {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.pad("ChildStdout { .. }")
-    }
-}
-
-/// A handle to a child process's stderr.
-///
-/// This struct is used in the [`stderr`] field on [`Child`].
-///
-/// When an instance of `ChildStderr` is [dropped], the `ChildStderr`'s
-/// underlying file handle will be closed.
-///
-/// [`Child`]: struct.Child.html
-/// [`stderr`]: struct.Child.html#structfield.stderr
-/// [dropped]: ../ops/trait.Drop.html
-#[stable(feature = "process", since = "1.0.0")]
-pub struct ChildStderr {
-    inner: AnonPipe
-}
-
-#[stable(feature = "process", since = "1.0.0")]
-impl Read for ChildStderr {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        self.inner.read(buf)
-    }
-    #[inline]
-    unsafe fn initializer(&self) -> Initializer {
-        Initializer::nop()
-    }
-}
-
-impl AsInner<AnonPipe> for ChildStderr {
-    fn as_inner(&self) -> &AnonPipe { &self.inner }
-}
-
-impl IntoInner<AnonPipe> for ChildStderr {
-    fn into_inner(self) -> AnonPipe { self.inner }
-}
-
-impl FromInner<AnonPipe> for ChildStderr {
-    fn from_inner(pipe: AnonPipe) -> ChildStderr {
-        ChildStderr { inner: pipe }
-    }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for ChildStderr {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.pad("ChildStderr { .. }")
-    }
-}
-
-/// A process builder, providing fine-grained control
-/// over how a new process should be spawned.
-///
-/// A default configuration can be
-/// generated using `Command::new(program)`, where `program` gives a path to the
-/// program to be executed. Additional builder methods allow the configuration
-/// to be changed (for example, by adding arguments) prior to spawning:
-///
-/// ```
-/// use std::process::Command;
-///
-/// let output = if cfg!(target_os = "windows") {
-///     Command::new("cmd")
-///             .args(&["/C", "echo hello"])
-///             .output()
-///             .expect("failed to execute process")
-/// } else {
-///     Command::new("sh")
-///             .arg("-c")
-///             .arg("echo hello")
-///             .output()
-///             .expect("failed to execute process")
-/// };
-///
-/// let hello = output.stdout;
-/// ```
-///
-/// `Command` can be reused to spawn multiple processes. The builder methods
-/// change the command without needing to immediately spawn the process.
-///
-/// ```no_run
-/// use std::process::Command;
-///
-/// let mut echo_hello = Command::new("sh");
-/// echo_hello.arg("-c")
-///           .arg("echo hello");
-/// let hello_1 = echo_hello.output().expect("failed to execute process");
-/// let hello_2 = echo_hello.output().expect("failed to execute process");
-/// ```
-///
-/// Similarly, you can call builder methods after spawning a process and then
-/// spawn a new process with the modified settings.
-///
-/// ```no_run
-/// use std::process::Command;
-///
-/// let mut list_dir = Command::new("ls");
-///
-/// // Execute `ls` in the current directory of the program.
-/// list_dir.status().expect("process failed to execute");
-///
-/// println!("");
-///
-/// // Change `ls` to execute in the root directory.
-/// list_dir.current_dir("/");
-///
-/// // And then execute `ls` again but in the root directory.
-/// list_dir.status().expect("process failed to execute");
-/// ```
-#[stable(feature = "process", since = "1.0.0")]
-pub struct Command {
-    inner: imp::Command,
-}
-
-impl Command {
-    /// Constructs a new `Command` for launching the program at
-    /// path `program`, with the following default configuration:
-    ///
-    /// * No arguments to the program
-    /// * Inherit the current process's environment
-    /// * Inherit the current process's working directory
-    /// * Inherit stdin/stdout/stderr for `spawn` or `status`, but create pipes for `output`
-    ///
-    /// Builder methods are provided to change these defaults and
-    /// otherwise configure the process.
-    ///
-    /// If `program` is not an absolute path, the `PATH` will be searched in
-    /// an OS-defined way.
-    ///
-    /// The search path to be used may be controlled by setting the
-    /// `PATH` environment variable on the Command,
-    /// but this has some implementation limitations on Windows
-    /// (see <https://github.com/rust-lang/rust/issues/37519>).
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("sh")
-    ///         .spawn()
-    ///         .expect("sh command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn new<S: AsRef<OsStr>>(program: S) -> Command {
-        Command { inner: imp::Command::new(program.as_ref()) }
-    }
-
-    /// Add an argument to pass to the program.
-    ///
-    /// Only one argument can be passed per use. So instead of:
-    ///
-    /// ```no_run
-    /// # std::process::Command::new("sh")
-    /// .arg("-C /path/to/repo")
-    /// # ;
-    /// ```
-    ///
-    /// usage would be:
-    ///
-    /// ```no_run
-    /// # std::process::Command::new("sh")
-    /// .arg("-C")
-    /// .arg("/path/to/repo")
-    /// # ;
-    /// ```
-    ///
-    /// To pass multiple arguments see [`args`].
-    ///
-    /// [`args`]: #method.args
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("ls")
-    ///         .arg("-l")
-    ///         .arg("-a")
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn arg<S: AsRef<OsStr>>(&mut self, arg: S) -> &mut Command {
-        self.inner.arg(arg.as_ref());
-        self
-    }
-
-    /// Add multiple arguments to pass to the program.
-    ///
-    /// To pass a single argument see [`arg`].
-    ///
-    /// [`arg`]: #method.arg
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("ls")
-    ///         .args(&["-l", "-a"])
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn args<I, S>(&mut self, args: I) -> &mut Command
-        where I: IntoIterator<Item=S>, S: AsRef<OsStr>
-    {
-        for arg in args {
-            self.arg(arg.as_ref());
-        }
-        self
-    }
-
-    /// Inserts or updates an environment variable mapping.
-    ///
-    /// Note that environment variable names are case-insensitive (but case-preserving) on Windows,
-    /// and case-sensitive on all other platforms.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("ls")
-    ///         .env("PATH", "/bin")
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn env<K, V>(&mut self, key: K, val: V) -> &mut Command
-        where K: AsRef<OsStr>, V: AsRef<OsStr>
-    {
-        self.inner.env_mut().set(key.as_ref(), val.as_ref());
-        self
-    }
-
-    /// Add or update multiple environment variable mappings.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    /// use std::env;
-    /// use std::collections::HashMap;
-    ///
-    /// let filtered_env : HashMap<String, String> =
-    ///     env::vars().filter(|&(ref k, _)|
-    ///         k == "TERM" || k == "TZ" || k == "LANG" || k == "PATH"
-    ///     ).collect();
-    ///
-    /// Command::new("printenv")
-    ///         .stdin(Stdio::null())
-    ///         .stdout(Stdio::inherit())
-    ///         .env_clear()
-    ///         .envs(&filtered_env)
-    ///         .spawn()
-    ///         .expect("printenv failed to start");
-    /// ```
-    #[stable(feature = "command_envs", since = "1.19.0")]
-    pub fn envs<I, K, V>(&mut self, vars: I) -> &mut Command
-        where I: IntoIterator<Item=(K, V)>, K: AsRef<OsStr>, V: AsRef<OsStr>
-    {
-        for (ref key, ref val) in vars {
-            self.inner.env_mut().set(key.as_ref(), val.as_ref());
-        }
-        self
-    }
-
-    /// Removes an environment variable mapping.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("ls")
-    ///         .env_remove("PATH")
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn env_remove<K: AsRef<OsStr>>(&mut self, key: K) -> &mut Command {
-        self.inner.env_mut().remove(key.as_ref());
-        self
-    }
-
-    /// Clears the entire environment map for the child process.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("ls")
-    ///         .env_clear()
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn env_clear(&mut self) -> &mut Command {
-        self.inner.env_mut().clear();
-        self
-    }
-
-    /// Sets the working directory for the child process.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("ls")
-    ///         .current_dir("/bin")
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn current_dir<P: AsRef<Path>>(&mut self, dir: P) -> &mut Command {
-        self.inner.cwd(dir.as_ref().as_ref());
-        self
-    }
-
-    /// Configuration for the child process's standard input (stdin) handle.
-    ///
-    /// Defaults to [`inherit`] when used with `spawn` or `status`, and
-    /// defaults to [`piped`] when used with `output`.
-    ///
-    /// [`inherit`]: struct.Stdio.html#method.inherit
-    /// [`piped`]: struct.Stdio.html#method.piped
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// Command::new("ls")
-    ///         .stdin(Stdio::null())
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn stdin<T: Into<Stdio>>(&mut self, cfg: T) -> &mut Command {
-        self.inner.stdin(cfg.into().0);
-        self
-    }
-
-    /// Configuration for the child process's standard output (stdout) handle.
-    ///
-    /// Defaults to [`inherit`] when used with `spawn` or `status`, and
-    /// defaults to [`piped`] when used with `output`.
-    ///
-    /// [`inherit`]: struct.Stdio.html#method.inherit
-    /// [`piped`]: struct.Stdio.html#method.piped
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// Command::new("ls")
-    ///         .stdout(Stdio::null())
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn stdout<T: Into<Stdio>>(&mut self, cfg: T) -> &mut Command {
-        self.inner.stdout(cfg.into().0);
-        self
-    }
-
-    /// Configuration for the child process's standard error (stderr) handle.
-    ///
-    /// Defaults to [`inherit`] when used with `spawn` or `status`, and
-    /// defaults to [`piped`] when used with `output`.
-    ///
-    /// [`inherit`]: struct.Stdio.html#method.inherit
-    /// [`piped`]: struct.Stdio.html#method.piped
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// Command::new("ls")
-    ///         .stderr(Stdio::null())
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn stderr<T: Into<Stdio>>(&mut self, cfg: T) -> &mut Command {
-        self.inner.stderr(cfg.into().0);
-        self
-    }
-
-    /// Executes the command as a child process, returning a handle to it.
-    ///
-    /// By default, stdin, stdout and stderr are inherited from the parent.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// Command::new("ls")
-    ///         .spawn()
-    ///         .expect("ls command failed to start");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn spawn(&mut self) -> io::Result<Child> {
-        self.inner.spawn(imp::Stdio::Inherit, true).map(Child::from_inner)
-    }
-
-    /// Executes the command as a child process, waiting for it to finish and
-    /// collecting all of its output.
-    ///
-    /// By default, stdout and stderr are captured (and used to provide the
-    /// resulting output). Stdin is not inherited from the parent and any
-    /// attempt by the child process to read from the stdin stream will result
-    /// in the stream immediately closing.
-    ///
-    /// # Examples
-    ///
-    /// ```should_panic
-    /// use std::process::Command;
-    /// let output = Command::new("/bin/cat")
-    ///                      .arg("file.txt")
-    ///                      .output()
-    ///                      .expect("failed to execute process");
-    ///
-    /// println!("status: {}", output.status);
-    /// println!("stdout: {}", String::from_utf8_lossy(&output.stdout));
-    /// println!("stderr: {}", String::from_utf8_lossy(&output.stderr));
-    ///
-    /// assert!(output.status.success());
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn output(&mut self) -> io::Result<Output> {
-        self.inner.spawn(imp::Stdio::MakePipe, false).map(Child::from_inner)
-            .and_then(|p| p.wait_with_output())
-    }
-
-    /// Executes a command as a child process, waiting for it to finish and
-    /// collecting its exit status.
-    ///
-    /// By default, stdin, stdout and stderr are inherited from the parent.
-    ///
-    /// # Examples
-    ///
-    /// ```should_panic
-    /// use std::process::Command;
-    ///
-    /// let status = Command::new("/bin/cat")
-    ///                      .arg("file.txt")
-    ///                      .status()
-    ///                      .expect("failed to execute process");
-    ///
-    /// println!("process exited with: {}", status);
-    ///
-    /// assert!(status.success());
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn status(&mut self) -> io::Result<ExitStatus> {
-        self.inner.spawn(imp::Stdio::Inherit, true).map(Child::from_inner)
-                  .and_then(|mut p| p.wait())
-    }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl fmt::Debug for Command {
-    /// Format the program and arguments of a Command for display. Any
-    /// non-utf8 data is lossily converted using the utf8 replacement
-    /// character.
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        self.inner.fmt(f)
-    }
-}
-
-impl AsInner<imp::Command> for Command {
-    fn as_inner(&self) -> &imp::Command { &self.inner }
-}
-
-impl AsInnerMut<imp::Command> for Command {
-    fn as_inner_mut(&mut self) -> &mut imp::Command { &mut self.inner }
-}
-
-/// The output of a finished process.
-///
-/// This is returned in a Result by either the [`output`] method of a
-/// [`Command`], or the [`wait_with_output`] method of a [`Child`]
-/// process.
-///
-/// [`Command`]: struct.Command.html
-/// [`Child`]: struct.Child.html
-/// [`output`]: struct.Command.html#method.output
-/// [`wait_with_output`]: struct.Child.html#method.wait_with_output
-#[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: &dyn fmt::Debug = match stdout_utf8 {
-            Ok(ref str) => str,
-            Err(_) => &self.stdout
-        };
-
-        let stderr_utf8 = str::from_utf8(&self.stderr);
-        let stderr_debug: &dyn 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 when
-/// passed to the [`stdin`], [`stdout`], and [`stderr`] methods of [`Command`].
-///
-/// [`stdin`]: struct.Command.html#method.stdin
-/// [`stdout`]: struct.Command.html#method.stdout
-/// [`stderr`]: struct.Command.html#method.stderr
-/// [`Command`]: struct.Command.html
-#[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.
-    ///
-    /// # Examples
-    ///
-    /// With stdout:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// let output = Command::new("echo")
-    ///     .arg("Hello, world!")
-    ///     .stdout(Stdio::piped())
-    ///     .output()
-    ///     .expect("Failed to execute command");
-    ///
-    /// assert_eq!(String::from_utf8_lossy(&output.stdout), "Hello, world!\n");
-    /// // Nothing echoed to console
-    /// ```
-    ///
-    /// With stdin:
-    ///
-    /// ```no_run
-    /// use std::io::Write;
-    /// use std::process::{Command, Stdio};
-    ///
-    /// let mut child = Command::new("rev")
-    ///     .stdin(Stdio::piped())
-    ///     .stdout(Stdio::piped())
-    ///     .spawn()
-    ///     .expect("Failed to spawn child process");
-    ///
-    /// {
-    ///     let mut stdin = child.stdin.as_mut().expect("Failed to open stdin");
-    ///     stdin.write_all("Hello, world!".as_bytes()).expect("Failed to write to stdin");
-    /// }
-    ///
-    /// let output = child.wait_with_output().expect("Failed to read stdout");
-    /// assert_eq!(String::from_utf8_lossy(&output.stdout), "!dlrow ,olleH\n");
-    /// ```
-    #[stable(feature = "process", since = "1.0.0")]
-    pub fn piped() -> Stdio { Stdio(imp::Stdio::MakePipe) }
-
-    /// The child inherits from the corresponding parent descriptor.
-    ///
-    /// # Examples
-    ///
-    /// With stdout:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// let output = Command::new("echo")
-    ///     .arg("Hello, world!")
-    ///     .stdout(Stdio::inherit())
-    ///     .output()
-    ///     .expect("Failed to execute command");
-    ///
-    /// assert_eq!(String::from_utf8_lossy(&output.stdout), "");
-    /// // "Hello, world!" echoed to console
-    /// ```
-    ///
-    /// With stdin:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// let output = Command::new("rev")
-    ///     .stdin(Stdio::inherit())
-    ///     .stdout(Stdio::piped())
-    ///     .output()
-    ///     .expect("Failed to execute command");
-    ///
-    /// println!("You piped in the reverse of: {}", String::from_utf8_lossy(&output.stdout));
-    /// ```
-    #[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`
-    ///
-    /// # Examples
-    ///
-    /// With stdout:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// let output = Command::new("echo")
-    ///     .arg("Hello, world!")
-    ///     .stdout(Stdio::null())
-    ///     .output()
-    ///     .expect("Failed to execute command");
-    ///
-    /// assert_eq!(String::from_utf8_lossy(&output.stdout), "");
-    /// // Nothing echoed to console
-    /// ```
-    ///
-    /// With stdin:
-    ///
-    /// ```no_run
-    /// use std::process::{Command, Stdio};
-    ///
-    /// let output = Command::new("rev")
-    ///     .stdin(Stdio::null())
-    ///     .stdout(Stdio::piped())
-    ///     .output()
-    ///     .expect("Failed to execute command");
-    ///
-    /// assert_eq!(String::from_utf8_lossy(&output.stdout), "");
-    /// // Ignores any piped-in input
-    /// ```
-    #[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)
-    }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for Stdio {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.pad("Stdio { .. }")
-    }
-}
-
-#[stable(feature = "stdio_from", since = "1.20.0")]
-impl From<ChildStdin> for Stdio {
-    fn from(child: ChildStdin) -> Stdio {
-        Stdio::from_inner(child.into_inner().into())
-    }
-}
-
-#[stable(feature = "stdio_from", since = "1.20.0")]
-impl From<ChildStdout> for Stdio {
-    fn from(child: ChildStdout) -> Stdio {
-        Stdio::from_inner(child.into_inner().into())
-    }
-}
-
-#[stable(feature = "stdio_from", since = "1.20.0")]
-impl From<ChildStderr> for Stdio {
-    fn from(child: ChildStderr) -> Stdio {
-        Stdio::from_inner(child.into_inner().into())
-    }
-}
-
-#[stable(feature = "stdio_from", since = "1.20.0")]
-impl From<fs::File> for Stdio {
-    fn from(file: fs::File) -> Stdio {
-        Stdio::from_inner(file.into_inner().into())
-    }
-}
-
-/// Describes the result of a process after it has terminated.
-///
-/// This `struct` is used to represent the exit status of a child process.
-/// Child processes are created via the [`Command`] struct and their exit
-/// status is exposed through the [`status`] method.
-///
-/// [`Command`]: struct.Command.html
-/// [`status`]: struct.Command.html#method.status
-#[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 is 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`.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// let status = Command::new("mkdir")
-    ///                      .arg("projects")
-    ///                      .status()
-    ///                      .expect("failed to execute mkdir");
-    ///
-    /// match status.code() {
-    ///     Some(code) => println!("Exited with status code: {}", code),
-    ///     None       => println!("Process terminated by signal")
-    /// }
-    /// ```
-    #[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)
-    }
-}
-
-/// This type represents the status code a process can return to its
-/// parent under normal termination.
-///
-/// Numeric values used in this type don't have portable meanings, and
-/// different platforms may mask different amounts of them.
-///
-/// For the platform's canonical successful and unsuccessful codes, see
-/// the [`SUCCESS`] and [`FAILURE`] associated items.
-///
-/// [`SUCCESS`]: #associatedconstant.SUCCESS
-/// [`FAILURE`]: #associatedconstant.FAILURE
-///
-/// **Warning**: While various forms of this were discussed in [RFC #1937],
-/// it was ultimately cut from that RFC, and thus this type is more subject
-/// to change even than the usual unstable item churn.
-///
-/// [RFC #1937]: https://github.com/rust-lang/rfcs/pull/1937
-#[derive(Clone, Copy, Debug)]
-#[unstable(feature = "process_exitcode_placeholder", issue = "48711")]
-pub struct ExitCode(pub u8);
-
-#[unstable(feature = "process_exitcode_placeholder", issue = "48711")]
-impl ExitCode {
-    /// The canonical ExitCode for successful termination on this platform.
-    ///
-    /// Note that a `()`-returning `main` implicitly results in a successful
-    /// termination, so there's no need to return this from `main` unless
-    /// you're also returning other possible codes.
-    #[unstable(feature = "process_exitcode_placeholder", issue = "48711")]
-    pub const SUCCESS: ExitCode = ExitCode(0 as _);
-
-    /// The canonical ExitCode for unsuccessful termination on this platform.
-    ///
-    /// If you're only returning this and `SUCCESS` from `main`, consider
-    /// instead returning `Err(_)` and `Ok(())` respectively, which will
-    /// return the same codes (but will also `eprintln!` the error).
-    #[unstable(feature = "process_exitcode_placeholder", issue = "48711")]
-    pub const FAILURE: ExitCode = ExitCode(-1 as _);
-}
-
-impl Child {
-    /// Forces the child process to exit. If the child has already exited, an [`InvalidInput`]
-    /// error is returned.
-    ///
-    /// The mapping to [`ErrorKind`]s is not part of the compatibility contract of the function,
-    /// especially the [`Other`] kind might change to more specific kinds in the future.
-    ///
-    /// 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");
-    /// }
-    /// ```
-    ///
-    /// [`ErrorKind`]: ../io/enum.ErrorKind.html
-    /// [`InvalidInput`]: ../io/enum.ErrorKind.html#variant.InvalidInput
-    /// [`Other`]: ../io/enum.ErrorKind.html#variant.Other
-    #[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)
-    }
-
-    /// Attempts to collect the exit status of the child if it has already
-    /// exited.
-    ///
-    /// This function will not block the calling thread and will only advisorily
-    /// check to see if the child process has exited or not. If the child has
-    /// exited then on Unix the process id is reaped. This function is
-    /// guaranteed to repeatedly return a successful exit status so long as the
-    /// child has already exited.
-    ///
-    /// If the child has exited, then `Ok(Some(status))` is returned. If the
-    /// exit status is not available at this time then `Ok(None)` is returned.
-    /// If an error occurs, then that error is returned.
-    ///
-    /// Note that unlike `wait`, this function will not attempt to drop stdin.
-    ///
-    /// # Examples
-    ///
-    /// Basic usage:
-    ///
-    /// ```no_run
-    /// use std::process::Command;
-    ///
-    /// let mut child = Command::new("ls").spawn().unwrap();
-    ///
-    /// match child.try_wait() {
-    ///     Ok(Some(status)) => println!("exited with: {}", status),
-    ///     Ok(None) => {
-    ///         println!("status not ready yet, let's really wait");
-    ///         let res = child.wait();
-    ///         println!("result: {:?}", res);
-    ///     }
-    ///     Err(e) => println!("error attempting to wait: {}", e),
-    /// }
-    /// ```
-    #[stable(feature = "process_try_wait", since = "1.18.0")]
-    pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> {
-        Ok(self.handle.try_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,
-            stdout,
-            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.
-///
-/// ## Platform-specific behavior
-///
-/// **Unix**: On Unix-like platforms, it is unlikely that all 32 bits of `exit`
-/// will be visible to a parent process inspecting the exit code. On most
-/// Unix-like platforms, only the eight least-significant bits are considered.
-///
-/// # Examples
-///
-/// Due to this function’s behavior regarding destructors, a conventional way
-/// to use the function is to extract the actual computation to another
-/// function and compute the exit code from its return value:
-///
-/// ```
-/// fn run_app() -> Result<(), ()> {
-///     // Application logic here
-///     Ok(())
-/// }
-///
-/// fn main() {
-///     ::std::process::exit(match run_app() {
-///        Ok(_) => 0,
-///        Err(err) => {
-///            eprintln!("error: {:?}", err);
-///            1
-///        }
-///     });
-/// }
-/// ```
-///
-/// Due to [platform-specific behavior], the exit code for this example will be
-/// `0` on Linux, but `256` on Windows:
-///
-/// ```no_run
-/// use std::process;
-///
-/// process::exit(0x0100);
-/// ```
-///
-/// [platform-specific behavior]: #platform-specific-behavior
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn exit(code: i32) -> ! {
-    ::sys_common::cleanup();
-    ::sys::os::exit(code)
-}
-
-/// Terminates the process in an abnormal fashion.
-///
-/// The function will never return and will immediately terminate the current
-/// process in a platform specific "abnormal" manner.
-///
-/// 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.
-///
-/// This is in contrast to the default behaviour of [`panic!`] which unwinds
-/// the current thread's stack and calls all destructors.
-/// When `panic="abort"` is set, either as an argument to `rustc` or in a
-/// crate's Cargo.toml, [`panic!`] and `abort` are similar. However,
-/// [`panic!`] will still call the [panic hook] while `abort` will not.
-///
-/// 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.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::process;
-///
-/// fn main() {
-///     println!("aborting");
-///
-///     process::abort();
-///
-///     // execution never gets here
-/// }
-/// ```
-///
-/// The `abort` function terminates the process, so the destructor will not
-/// get run on the example below:
-///
-/// ```no_run
-/// use std::process;
-///
-/// struct HasDrop;
-///
-/// impl Drop for HasDrop {
-///     fn drop(&mut self) {
-///         println!("This will never be printed!");
-///     }
-/// }
-///
-/// fn main() {
-///     let _x = HasDrop;
-///     process::abort();
-///     // the destructor implemented for HasDrop will never get run
-/// }
-/// ```
-///
-/// [`panic!`]: ../../std/macro.panic.html
-/// [panic hook]: ../../std/panic/fn.set_hook.html
-#[stable(feature = "process_abort", since = "1.17.0")]
-pub fn abort() -> ! {
-    unsafe { ::sys::abort_internal() };
-}
-
-/// Returns the OS-assigned process identifier associated with this process.
-///
-/// # Examples
-///
-/// Basic usage:
-///
-/// ```no_run
-/// use std::process;
-///
-/// println!("My pid is {}", process::id());
-/// ```
-///
-///
-#[stable(feature = "getpid", since = "1.26.0")]
-pub fn id() -> u32 {
-    ::sys::os::getpid()
-}
-
-/// A trait for implementing arbitrary return types in the `main` function.
-///
-/// The c-main function only supports to return integers as return type.
-/// So, every type implementing the `Termination` trait has to be converted
-/// to an integer.
-///
-/// The default implementations are returning `libc::EXIT_SUCCESS` to indicate
-/// a successful execution. In case of a failure, `libc::EXIT_FAILURE` is returned.
-#[cfg_attr(not(test), lang = "termination")]
-#[unstable(feature = "termination_trait_lib", issue = "43301")]
-#[rustc_on_unimplemented(
-  message="`main` has invalid return type `{Self}`",
-  label="`main` can only return types that implement `{Termination}`")]
-pub trait Termination {
-    /// Is called to get the representation of the value as status code.
-    /// This status code is returned to the operating system.
-    fn report(self) -> i32;
-}
-
-#[unstable(feature = "termination_trait_lib", issue = "43301")]
-impl Termination for () {
-    #[inline]
-    fn report(self) -> i32 { ExitCode::SUCCESS.report() }
-}
-
-#[unstable(feature = "termination_trait_lib", issue = "43301")]
-impl<E: fmt::Debug> Termination for Result<(), E> {
-    fn report(self) -> i32 {
-        match self {
-            Ok(()) => ().report(),
-            Err(err) => Err::<!, _>(err).report(),
-        }
-    }
-}
-
-#[unstable(feature = "termination_trait_lib", issue = "43301")]
-impl Termination for ! {
-    fn report(self) -> i32 { self }
-}
-
-#[unstable(feature = "termination_trait_lib", issue = "43301")]
-impl<E: fmt::Debug> Termination for Result<!, E> {
-    fn report(self) -> i32 {
-        let Err(err) = self;
-        eprintln!("Error: {:?}", err);
-        ExitCode::FAILURE.report()
-    }
-}
-
-#[unstable(feature = "termination_trait_lib", issue = "43301")]
-impl Termination for ExitCode {
-    #[inline]
-    fn report(self) -> i32 {
-        self.0 as i32
-    }
-}
-
-#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten"))))]
-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 = if cfg!(target_os = "windows") {
-            Command::new("cmd").args(&["/C", "exit 0"]).spawn()
-        } else {
-            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 = if cfg!(target_os = "windows") {
-            Command::new("cmd").args(&["/C", "exit 1"]).spawn()
-        } else {
-            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() {
-        if cfg!(target_os = "windows") {
-            let mut cmd = Command::new("cmd");
-            cmd.args(&["/C", "echo foobar"]).stdout(Stdio::piped());
-            assert_eq!(run_output(cmd), "foobar\r\n");
-        } else {
-            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 = if cfg!(target_os = "windows") {
-            Command::new("cmd").args(&["/C", "exit 1"]).status().unwrap()
-        } else {
-            Command::new("false").status().unwrap()
-        };
-        assert!(status.code() == Some(1));
-
-        status = if cfg!(target_os = "windows") {
-            Command::new("cmd").args(&["/C", "exit 0"]).status().unwrap()
-        } else {
-            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}
-             = if cfg!(target_os = "windows") {
-                 Command::new("cmd").args(&["/C", "echo hello"]).output().unwrap()
-             } else {
-                 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}
-             = if cfg!(target_os = "windows") {
-                 Command::new("cmd").args(&["/C", "mkdir ."]).output().unwrap()
-             } else {
-                 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 = if cfg!(target_os = "windows") {
-            Command::new("cmd").args(&["/C", "exit 1"]).spawn().unwrap()
-        } else {
-            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 = if cfg!(target_os = "windows") {
-            Command::new("cmd").args(&["/C", "exit 1"]).spawn().unwrap()
-        } else {
-            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 = if cfg!(target_os = "windows") {
-            Command::new("cmd").args(&["/C", "echo hello"]).stdout(Stdio::piped()).spawn().unwrap()
-        } else {
-            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 variable which seems to change
-            // whenever the shell runs, and our `env_cmd` is indeed running a
-            // shell which means it'll get a different RANDOM than we probably
-            // have.
-            //
-            // Also skip env vars with `-` in the name on android because, well,
-            // I'm not sure. It appears though that the `set` command above does
-            // not print env vars with `-` in the name, so we just skip them
-            // here as we won't find them in the output. Note that most env vars
-            // use `_` instead of `-`, but our build system sets a few env vars
-            // with `-` in the name.
-            if cfg!(target_os = "android") &&
-               (*k == "RANDOM" || k.contains("-")) {
-                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);
-    }
-
-    #[test]
-    fn test_capture_env_at_spawn() {
-        use env;
-
-        let mut cmd = env_cmd();
-        cmd.env("RUN_TEST_NEW_ENV1", "123");
-
-        // This variable will not be present if the environment has already
-        // been captured above.
-        env::set_var("RUN_TEST_NEW_ENV2", "456");
-        let result = cmd.output().unwrap();
-        env::remove_var("RUN_TEST_NEW_ENV2");
-
-        let output = String::from_utf8_lossy(&result.stdout).to_string();
-
-        assert!(output.contains("RUN_TEST_NEW_ENV1=123"),
-                "didn't find RUN_TEST_NEW_ENV1 inside of:\n\n{}", output);
-        assert!(output.contains("RUN_TEST_NEW_ENV2=456"),
-                "didn't find RUN_TEST_NEW_ENV2 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!(),
-        }
-    }
-
-    /// Test that process creation flags work by debugging a process.
-    /// Other creation flags make it hard or impossible to detect
-    /// behavioral changes in the process.
-    #[test]
-    #[cfg(windows)]
-    fn test_creation_flags() {
-        use os::windows::process::CommandExt;
-        use sys::c::{BOOL, DWORD, INFINITE};
-        #[repr(C, packed)]
-        struct DEBUG_EVENT {
-            pub event_code: DWORD,
-            pub process_id: DWORD,
-            pub thread_id: DWORD,
-            // This is a union in the real struct, but we don't
-            // need this data for the purposes of this test.
-            pub _junk: [u8; 164],
-        }
-
-        extern "system" {
-            fn WaitForDebugEvent(lpDebugEvent: *mut DEBUG_EVENT, dwMilliseconds: DWORD) -> BOOL;
-            fn ContinueDebugEvent(dwProcessId: DWORD, dwThreadId: DWORD,
-                                  dwContinueStatus: DWORD) -> BOOL;
-        }
-
-        const DEBUG_PROCESS: DWORD = 1;
-        const EXIT_PROCESS_DEBUG_EVENT: DWORD = 5;
-        const DBG_EXCEPTION_NOT_HANDLED: DWORD = 0x80010001;
-
-        let mut child = Command::new("cmd")
-            .creation_flags(DEBUG_PROCESS)
-            .stdin(Stdio::piped()).spawn().unwrap();
-        child.stdin.take().unwrap().write_all(b"exit\r\n").unwrap();
-        let mut events = 0;
-        let mut event = DEBUG_EVENT {
-            event_code: 0,
-            process_id: 0,
-            thread_id: 0,
-            _junk: [0; 164],
-        };
-        loop {
-            if unsafe { WaitForDebugEvent(&mut event as *mut DEBUG_EVENT, INFINITE) } == 0 {
-                panic!("WaitForDebugEvent failed!");
-            }
-            events += 1;
-
-            if event.event_code == EXIT_PROCESS_DEBUG_EVENT {
-                break;
-            }
-
-            if unsafe { ContinueDebugEvent(event.process_id,
-                                           event.thread_id,
-                                           DBG_EXCEPTION_NOT_HANDLED) } == 0 {
-                panic!("ContinueDebugEvent failed!");
-            }
-        }
-        assert!(events > 0);
-    }
-
-    #[test]
-    fn test_command_implements_send() {
-        fn take_send_type<T: Send>(_: T) {}
-        take_send_type(Command::new(""))
-    }
-}