Execute bash command in Node.js and get exit code

Question

I can run a bash command in node.js like so:

var sys = require(\'sys\')
var exec = require(\'child_process\').exec;

function puts(error, stdout, stderr) { s         


        

Answer 1

From the docs:

If a callback function is provided, it is called with the arguments (error, stdout, stderr). On success, error will be null. On error, error will be an instance of Error. The error.code property will be the exit code of the child process while error.signal will be set to the signal that terminated the process. Any exit code other than 0 is considered to be an error.

So:

exec('...', function(error, stdout, stderr) {
  if (error) {
    console.log(error.code);
  }
});

Should work.