114 lines
3.3 KiB
Rust
114 lines
3.3 KiB
Rust
//! Tools for spawning programs.
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use std::{cell::RefCell, collections::HashMap, os::fd::OwnedFd};
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/// Sets an environment variable.
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///
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/// This does not affect the compositor itself but only programs spawned by the compositor.
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pub fn set_env(key: &str, val: &str) {
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get!().set_env(key, val);
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}
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/// Unsets an environment variable.
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///
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/// This does not affect the compositor itself but only programs spawned by the compositor.
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pub fn unset_env(key: &str) {
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get!().unset_env(key);
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}
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/// A command to be spawned.
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pub struct Command {
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pub(crate) prog: String,
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pub(crate) args: Vec<String>,
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pub(crate) env: HashMap<String, String>,
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pub(crate) fds: RefCell<HashMap<i32, OwnedFd>>,
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pub(crate) tag: Option<String>,
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}
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impl Command {
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/// Creates a new command to be spawned.
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///
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/// `prog` should be the path to the program being spawned. If `prog` does not contain
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/// a `/`, then it will be searched in `PATH` similar to how a shell would do it.
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///
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/// The first argument passed to `prog`, `argv[0]`, is `prog` itself.
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pub fn new(prog: &str) -> Self {
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Self {
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prog: prog.to_string(),
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args: vec![],
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env: Default::default(),
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fds: Default::default(),
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tag: Default::default(),
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}
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}
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/// Adds an argument to be passed to the command.
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pub fn arg(&mut self, arg: &str) -> &mut Self {
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self.args.push(arg.to_string());
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self
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}
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/// Sets an environment variable for this command only.
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pub fn env(&mut self, key: &str, val: &str) -> &mut Self {
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self.env.insert(key.to_string(), val.to_string());
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self
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}
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/// Sets a file descriptor of the process.
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///
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/// By default, the process starts with exactly stdin, stdout, and stderr open and all
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/// pointing to `/dev/null`.
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pub fn fd<F: Into<OwnedFd>>(&mut self, idx: i32, fd: F) -> &mut Self {
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self.fds.borrow_mut().insert(idx, fd.into());
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self
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}
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/// Sets the stdin of the process.
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///
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/// This is equivalent to `fd(0, fd)`.
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pub fn stdin<F: Into<OwnedFd>>(&mut self, fd: F) -> &mut Self {
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self.fd(0, fd)
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}
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/// Sets the stdout of the process.
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///
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/// This is equivalent to `fd(1, fd)`.
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pub fn stdout<F: Into<OwnedFd>>(&mut self, fd: F) -> &mut Self {
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self.fd(1, fd)
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}
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/// Sets the stderr of the process.
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///
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/// This is equivalent to `fd(2, fd)`.
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pub fn stderr<F: Into<OwnedFd>>(&mut self, fd: F) -> &mut Self {
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self.fd(2, fd)
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}
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/// Runs the application with access to privileged wayland protocols.
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///
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/// The default is `false`.
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pub fn privileged(&mut self) -> &mut Self {
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match get!(self).get_socket_path() {
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Some(path) => {
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self.env("WAYLAND_DISPLAY", &format!("{path}.jay"));
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}
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_ => {
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log::error!("Compositor did not send the socket path");
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}
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}
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self
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}
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/// Adds a tag to Wayland connections created by the spawned command.
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pub fn tag(&mut self, tag: &str) -> &mut Self {
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self.tag = Some(tag.to_owned());
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self
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}
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/// Executes the command.
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///
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/// This consumes all attached file descriptors.
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pub fn spawn(&self) {
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get!().spawn(self);
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}
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}
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