如何使用 spawn 在节点 js 中暂停进程

Question

Is there any way, how to pause process in node js?

          const { spawn } = require('child_process');

          const process = spawn("run.cmd");

          process.stdout.on('data', (data) => {
            console.log(`stdout: ${data}`);
          });

          process.stderr.on('data', (data) => {
            console.log(`stderr: ${data}`);
          });

          process.on('close', (code) => {

          });

I want call somethink like this: process.pause() , process.continue() .

Or some system call using cmd?

I am using windows.

Thank you for any help.

Answer 1

You can find out the process PID and use linux command to pause/resume process by PID.
You can change your code to process = spawn(cmd & echo $! > txt) .
It would save your cmd process PID to txt, and then you can use fs to read the PID.

Now you have PID, run exec() to pause process kill -STOP <PID> or resume stopped cmd kill -CONT <PID> .
These two are unix command, should work fine.

Answer 2

I specifically made a library to pause/resume processes from Node.js on Windows, ntsuspend .

const { spawn } = require('child_process');
const ntsuspend = require('ntsuspend');
const process = spawn("run.cmd");
ntsuspend.suspend(process.pid);
ntsuspend.resume(process.pid);

If you're using Linux or MacOS

const { spawn } = require('child_process');
const ntsuspend = require('ntsuspend');
const process = spawn("run.cmd");
process.kill('SIGSTOP');
process.kill('SIGCONT');

Answer 3

Just use the readline package, you can basically use the functions easily

To pause the process

rl.pause()

To resume the process

rl.resume()

If you want more information you can check out these two places

Resume - node.js docs

Pause - node.js docs

Answer 4

Send it a signal: read this

But what signal? read this