仅使用pid向分叉的child_process传递消息

Question

I have a main process spawning child_processes for long jobs.

I want to be able to poll the processes to get an update on the completion of the task, but all I have is their pid. How can I send a message to a specific process in nodejs?

Answer 1

If you're using child_process.fork() ( which I'm assuming you are ), you can send a message to the child process using child.send() : http://nodejs.org/api/child_process.html#child_process_child_send_message_sendhandle

There's no way to retrieve a child process object given a PID directly, however.