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Return stdout, stderr and errors as an object if no callback is specified in exec()

Rodrigo Muino Tomonari requested to merge github/fork/Gum-Joe/gum-joe-javascript into master

Usage:

var cmd = exec('ls -l / ');
if cmd.error; throw new Error;
console.log(cmd.stdout)
console.log(cmd.stderr)
console.log(cmd);

Should return:

drwxr-xr-x  1 User 197609       0 Oct 18 10:17 bin/
drwxr-xr-x  1 User 197609       0 Oct 18 10:16 cmd/
drwxr-xr-x  1 User 197609       0 Oct 18 10:17 dev/
drwxr-xr-x  1 User 197609       0 Oct 18 10:17 etc/
-rwxr-xr-x  1 User 197609  140800 Oct  5 20:00 git-bash.exe*
-rwxr-xr-x  1 User 197609  140288 Oct  5 20:00 git-cmd.exe*
drwxr-xr-x  1 User 197609       0 Oct 18 10:16 mingw64/
dr-xr-xr-x 22 User 197609       0 Oct 18 20:08 proc/
-rw-r--r--  1 User 197609   56930 Oct  5 20:41 ReleaseNotes.html
drwxr-xr-x  1 User 197609       0 Oct 18 20:05 tmp/
-rw-r--r--  1 User 197609  968959 Oct 18 10:17 unins001.dat
-rwxr-xr-x  1 User 197609 1300777 Oct 18 10:14 unins001.exe*
drwxr-xr-x  1 User 197609       0 Oct 18 10:16 usr/

{stdout: drwxr-xr-x  1 User 197609       0 Oct 18 10:17 bin/
drwxr-xr-x  1 User 197609       0 Oct 18 10:16 cmd/
drwxr-xr-x  1 User 197609       0 Oct 18 10:17 dev/
drwxr-xr-x  1 User 197609       0 Oct 18 10:17 etc/
-rwxr-xr-x  1 User 197609  140800 Oct  5 20:00 git-bash.exe*
-rwxr-xr-x  1 User 197609  140288 Oct  5 20:00 git-cmd.exe*
drwxr-xr-x  1 User 197609       0 Oct 18 10:16 mingw64/
dr-xr-xr-x 22 User 197609       0 Oct 18 20:08 proc/
-rw-r--r--  1 User 197609   56930 Oct  5 20:41 ReleaseNotes.html
drwxr-xr-x  1 User 197609       0 Oct 18 20:05 tmp/
-rw-r--r--  1 User 197609  968959 Oct 18 10:17 unins001.dat
-rwxr-xr-x  1 User 197609 1300777 Oct 18 10:14 unins001.exe*
drwxr-xr-x  1 User 197609       0 Oct 18 10:16 usr/
, stderr: null, errors: null}

This could be used like so, in an express app:

app.get('/', function (req, res) {
  // body...
  var cmd = exec('command');
  if(cmd.errors){
    throw new Error;
  }
  res.send('Output:'+cmd.stdout);
});

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