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92 lines
2.8 KiB
92 lines
2.8 KiB
2 years ago
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use std::io::prelude::*;
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use std::os::unix::net::UnixListener;
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use std::{
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env, fs,
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path::Path,
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process::{exit, id, Command, Stdio},
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};
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use sysinfo::{ProcessExt, System, SystemExt};
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fn main() -> std::io::Result<()> {
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env::set_var("RUST_LOG", "swhks=trace");
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env_logger::init();
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let pidfile: String = String::from("/tmp/swhkc.pid");
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let sockfile: String = String::from("/tmp/swhkd.sock");
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if Path::new(&pidfile).exists() {
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log::trace!("Reading {} file and checking for running instances.", pidfile);
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let swhkd_pid = match fs::read_to_string(&pidfile) {
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Ok(swhkd_pid) => swhkd_pid,
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Err(e) => {
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log::error!("Unable to read {} to check all running instances", e);
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exit(1);
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}
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};
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log::debug!("Previous PID: {}", swhkd_pid);
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let mut sys = System::new_all();
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sys.refresh_all();
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for (pid, process) in sys.processes() {
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if pid.to_string() == swhkd_pid {
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if process.exe() == env::current_exe().unwrap() {
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log::error!("Server is already running!");
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exit(1);
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}
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}
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}
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}
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if Path::new(&sockfile).exists() {
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log::trace!("Sockfile exists, attempting to remove it.");
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match fs::remove_file(&sockfile) {
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Ok(_) => {
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log::debug!("Removed old socket file");
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}
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Err(e) => {
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log::error!("Error removing the socket file!: {}", e);
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log::error!("You can manually remove the socket file: {}", sockfile);
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exit(1);
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}
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};
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}
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match fs::write(&pidfile, id().to_string()) {
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Ok(_) => {}
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Err(e) => {
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log::error!("Unable to write to {}: {}", pidfile, e);
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exit(1);
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}
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}
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fn run_system_command(command: &String) -> () {
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match Command::new("sh")
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.arg("-c")
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.arg(command)
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.stdin(Stdio::null())
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.stdout(Stdio::null())
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.stderr(Stdio::null())
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.spawn()
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{
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Ok(_) => {}
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Err(e) => {
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log::error!("Failed to execute {}", command);
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log::error!("Error, {}", e);
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}
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}
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}
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let listener = UnixListener::bind(sockfile)?;
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loop {
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match listener.accept() {
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Ok((mut socket, addr)) => {
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let mut response = String::new();
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socket.read_to_string(&mut response)?;
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run_system_command(&response);
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log::debug!("Socket: {:?} Address: {:?} Response: {}", socket, addr, response);
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}
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Err(e) => log::error!("accept function failed: {:?}", e),
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}
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}
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}
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