Create child process and kill it after the process is invoked

Question

I use child process as follows

    var exec = require('child_process').exec;
    var cmd = 'npm install async --save';

    exec(cmd, function(error, stdout, stderr) {
        console.log('stdout: ' + stdout);
        console.log('stderr: ' + stderr);
        if(error || stderr){
            console.error(error);
            console.error(stderr);
            console.log("test");
        }


    });
exec.kill();

I want that when the process finished kill it,how I can do that? I try like I put in the post which cause errors...

• how to kill process
• how to veify that this process killed

Answer 1

The exec function returns a ChildProcess object, which has the kill method:

var child = exec(cmd, function(error, stdout, stderr) {
    console.log('stdout: ' + stdout);
    console.log('stderr: ' + stderr);
    if(error || stderr){
        console.error(error);
        console.error(stderr);
        console.log("test");
    }


});

child.kill();

It also has the exit event:

child.on("exit", function (code, signal) {
  if (code === null && signal === "SIGTERM") {
    console.log("child has been terminated");
  }
});