84 lines
2.4 KiB
Rust
84 lines
2.4 KiB
Rust
//! Tools for spawning programs.
|
|
|
|
use std::{cell::RefCell, collections::HashMap, os::fd::OwnedFd};
|
|
|
|
/// Sets an environment variable.
|
|
///
|
|
/// This does not affect the compositor itself but only programs spawned by the compositor.
|
|
pub fn set_env(key: &str, val: &str) {
|
|
get!().set_env(key, val);
|
|
}
|
|
|
|
/// A command to be spawned.
|
|
pub struct Command {
|
|
pub(crate) prog: String,
|
|
pub(crate) args: Vec<String>,
|
|
pub(crate) env: HashMap<String, String>,
|
|
pub(crate) fds: RefCell<HashMap<i32, OwnedFd>>,
|
|
}
|
|
|
|
impl Command {
|
|
/// Creates a new command to be spawned.
|
|
///
|
|
/// `prog` should be the path to the program being spawned. If `prog` does not contain
|
|
/// a `/`, then it will be searched in `PATH` similar to how a shell would do it.
|
|
///
|
|
/// The first argument passed to `prog`, `argv[0]`, is `prog` itself.
|
|
pub fn new(prog: &str) -> Self {
|
|
Self {
|
|
prog: prog.to_string(),
|
|
args: vec![],
|
|
env: Default::default(),
|
|
fds: Default::default(),
|
|
}
|
|
}
|
|
|
|
/// Adds an argument to be passed to the command.
|
|
pub fn arg(&mut self, arg: &str) -> &mut Self {
|
|
self.args.push(arg.to_string());
|
|
self
|
|
}
|
|
|
|
/// Sets an environment variable for this command only.
|
|
pub fn env(&mut self, key: &str, val: &str) -> &mut Self {
|
|
self.env.insert(key.to_string(), val.to_string());
|
|
self
|
|
}
|
|
|
|
/// Sets a file descriptor of the process.
|
|
///
|
|
/// By default, the process starts with exactly stdin, stdout, and stderr open and all
|
|
/// pointing to `/dev/null`.
|
|
pub fn fd<F: Into<OwnedFd>>(&mut self, idx: i32, fd: F) -> &mut Self {
|
|
self.fds.borrow_mut().insert(idx, fd.into());
|
|
self
|
|
}
|
|
|
|
/// Sets the stdin of the process.
|
|
///
|
|
/// This is equivalent to `fd(0, fd)`.
|
|
pub fn stdin<F: Into<OwnedFd>>(&mut self, fd: F) -> &mut Self {
|
|
self.fd(0, fd)
|
|
}
|
|
|
|
/// Sets the stdout of the process.
|
|
///
|
|
/// This is equivalent to `fd(1, fd)`.
|
|
pub fn stdout<F: Into<OwnedFd>>(&mut self, fd: F) -> &mut Self {
|
|
self.fd(1, fd)
|
|
}
|
|
|
|
/// Sets the stderr of the process.
|
|
///
|
|
/// This is equivalent to `fd(2, fd)`.
|
|
pub fn stderr<F: Into<OwnedFd>>(&mut self, fd: F) -> &mut Self {
|
|
self.fd(2, fd)
|
|
}
|
|
|
|
/// Executes the command.
|
|
///
|
|
/// This consumes all attached file descriptors.
|
|
pub fn spawn(&self) {
|
|
get!().spawn(self);
|
|
}
|
|
}
|