Node.js v0.8 exiting child_process.spawn early

early-exit.js

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

function exec(args, callback) {
  var out = '',
      err = '',
      child = spawn(args[0], args.slice(1));

  child.stdout.on('data', function(data) {
    console.log('exec got stdout'+out);
    out += data; 
  });
  child.stderr.on('data', function(data) {
    err += data;
  });

  child.on('exit', function(code) {
    console.log('exec got an exit');
    return callback(err, out, code);
  });

  return child;
};

for (var i = 0; i < 2; i++) {
  exec(['ls', '-lha'], function(err, out, code) {
    console.dir(out);
  });
}

zoutput.txt

root@tau-09:/tmp/fake# node -v
v0.8.3-pre
root@tau-09:/tmp/fake# node ../exec-test.js 
exec got an exit
''
exec got stdout
exec got stdout
exec got an exit
'total 8.0K\ndrwxr-xr-x 2 root root 117 Aug 20 18:17 .\ndrwxrwxrwt 9 root sys  899 Aug 20 18:17 ..\n'



root@dave-01:/tmp/fake# node -v
v0.6.20-pre
root@dave-01:/tmp/fake# node ~/exec-test.js 
exec got stdout
exec got an exit
'total 8.0K\ndrwxr-xr-x 2 root root 117 Aug 20 18:17 .\ndrwxrwxrwt 7 root sys  657 Aug 20 18:17 ..\n'
exec got stdout
exec got an exit
'total 8.0K\ndrwxr-xr-x 2 root root 117 Aug 20 18:17 .\ndrwxrwxrwt 7 root sys  657 Aug 20 18:17 ..\n'

From #node.js on freenode ( cc: @DTrejo )

18:28:05 bahamas10 | mscdex: yes, same script (different name :( )
18:28:48 bahamas10 | in a last ditch effort i scp'd the script to the machine running v0.6, and it just worked
18:33:00 -- | Mode #Node.js [+o bnoordhuis] by ChanServ
18:33:55 mscdex | bahamas10: it's because ls is exiting before the streams are closed
18:34:11 mscdex | bahamas10: there is a 'close' event for that now in 0.8

bahamas10/node-exec@490cb45