1  const sleep = require('await-sleep')
 2  
 3  const isRunning = (pid) => {
 4    try {
 5      return process.kill(pid,0)
 6    } catch (e) {
 7      return e.code === 'EPERM'
 8    }
 9  }
10  
11  const waitForProc = async (pid) => {
12    while (isRunning(pid)) {
13      await sleep(5000)
14    }
15  }
16  
17  module.exports = { isRunning, waitForProc }