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use crate::error::*;
use std::os::unix::io::{AsRawFd as _, FromRawFd as _};
use std::os::unix::process::CommandExt as _;
pub struct Command {
pty: crate::pty::Pty,
command: std::process::Command,
pts_fh: Option<std::fs::File>,
}
impl Command {
pub fn new<S: AsRef<std::ffi::OsStr>>(program: S) -> Result<Self> {
let pty = crate::pty::Pty::new()?;
let pt_fd = pty.pt().as_raw_fd();
let pts_fh = pty.pts()?;
let pts_fd = pts_fh.as_raw_fd();
let mut command = std::process::Command::new(program);
command
.stdin(unsafe { std::process::Stdio::from_raw_fd(pts_fd) })
.stdout(unsafe { std::process::Stdio::from_raw_fd(pts_fd) })
.stderr(unsafe { std::process::Stdio::from_raw_fd(pts_fd) });
unsafe {
command.pre_exec(move || {
// XXX unwrap
nix::unistd::close(pt_fd)
.map_err(|e| e.as_errno().unwrap())?;
nix::unistd::close(pts_fd)
.map_err(|e| e.as_errno().unwrap())?;
Ok(())
});
}
Ok(Self {
pty,
command,
pts_fh: Some(pts_fh),
})
}
pub fn arg<S: AsRef<std::ffi::OsStr>>(&mut self, arg: S) -> &mut Self {
self.command.arg(arg);
self
}
pub fn args<I, S>(&mut self, args: I) -> &mut Self
where
I: IntoIterator<Item = S>,
S: AsRef<std::ffi::OsStr>,
{
self.command.args(args);
self
}
pub fn env<K, V>(&mut self, key: K, val: V) -> &mut Self
where
K: AsRef<std::ffi::OsStr>,
V: AsRef<std::ffi::OsStr>,
{
self.command.env(key, val);
self
}
pub fn envs<I, K, V>(&mut self, vars: I) -> &mut Self
where
I: IntoIterator<Item = (K, V)>,
K: AsRef<std::ffi::OsStr>,
V: AsRef<std::ffi::OsStr>,
{
self.command.envs(vars);
self
}
pub fn env_remove<K: AsRef<std::ffi::OsStr>>(
&mut self,
key: K,
) -> &mut Self {
self.command.env_remove(key);
self
}
pub fn env_clear(&mut self) -> &mut Self {
self.command.env_clear();
self
}
pub fn current_dir<P: AsRef<std::path::Path>>(
&mut self,
dir: P,
) -> &mut Self {
self.command.current_dir(dir);
self
}
pub fn uid(&mut self, id: u32) -> &mut Self {
self.command.uid(id);
self
}
pub fn gid(&mut self, id: u32) -> &mut Self {
self.command.gid(id);
self
}
pub fn spawn(&mut self) -> Result<std::process::Child> {
let child = self.command.spawn()?;
self.pts_fh = None;
Ok(child)
}
pub fn pty(&self) -> &std::fs::File {
self.pty.pt()
}
}
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