An rsync watcher

rsyncwatchd.js

var fs       = require('fs'),
    dir      = "/tmp/rpki/repository",
    tempFile = "/tmp/replace.rsync.conf",
    relFile  = "/etc/rsyncd.conf",
    repo     = "[repository]\n\tpath = /tmp/rpki/repository/";

var util  = require('util'),
    spawn = require('child_process').spawn;

function kick_rsync() {
  var rsync = spawn('rsync', ['--daemon']);
  console.log("Done spawning rsync");
};

fs.watch(dir, function(e, filename) {
  console.log("caught a " + e + " on " + filename);
  fs.stat(dir + "/" + filename, function(err, stats) {
    if(stats) {
      if(stats.isDirectory()) {
        console.log("got the change on: " + filename);
        fs.writeFileSync(relFile, repo + filename + "\n");
        var ps = spawn('ps', ['-C', 'rsync', '-o', 'pid=']);
        ps.stdout.on('data', function(pid) {
          console.log("killing proc: " + pid);
          process.kill(pid, 'SIGHUP');
        });
        ps.on('exit', function(code) {
          if(code !== 0) {
            console.log("Rsync not running...");
            kick_rsync();
          } else {
            // we killed it, give kernel time to reset
            setTimeout(kick_rsync, 5000);
          }
        });
      }   
    }   
  }); 
});