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use std::os::linux::net::SocketAddrExt;
use std::os::unix::net::{SocketAddr, UnixDatagram};
pub const NOTIFY_SOCKET_ENV: &str = "NOTIFY_SOCKET";
pub fn notify_target(value: &str) -> std::io::Result<SocketAddr> {
match value.strip_prefix('@') {
Some(abstract_name) => SocketAddr::from_abstract_name(abstract_name.as_bytes()),
None => SocketAddr::from_pathname(value),
}
}
pub fn sd_notify(state: &str) -> std::io::Result<bool> {
let Some(target) = std::env::var_os(NOTIFY_SOCKET_ENV) else {
return Ok(false);
};
let target = notify_target(&target.to_string_lossy())?;
let socket = UnixDatagram::unbound()?;
socket.send_to_addr(state.as_bytes(), &target)?;
Ok(true)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn a_notify_socket_path_receives_the_state_line() {
let dir = std::env::temp_dir().join(format!("meshd-notify-{}", std::process::id()));
let _ = std::fs::remove_dir_all(&dir);
std::fs::create_dir_all(&dir).unwrap();
let path = dir.join("notify.sock");
let receiver = UnixDatagram::bind(&path).unwrap();
let target = notify_target(path.to_str().unwrap()).unwrap();
let socket = UnixDatagram::unbound().unwrap();
socket.send_to_addr(b"READY=1", &target).unwrap();
let mut buf = [0u8; 64];
let n = receiver.recv(&mut buf).unwrap();
assert_eq!(&buf[..n], b"READY=1");
let _ = std::fs::remove_dir_all(&dir);
}
}
