check if child_process has ended in node.js?

Question

I am creating a cakefile using node.js and want to know if a child_process has ended before moving on the next one.

{exec} = require 'child_process'
 exec 'casperjs test.js', (err, stdout, stderr) ->
        err && throw err
        log stdout
        if //exec has finished
          log "finished executing"

Answer 1

When the callback of exec is called, the process has already been terminated. There's no need to add an additional check.

For spawn, you can bind an exit event listener.