code: function getRealUptime (next) {
    fs.readFile('/proc/uptime', 'utf8', function (err, uptime) {
      if (err || uptime === undefined) {
        console.warn("[pidusage] We couldn't find uptime from /proc/uptime, using os.uptime() value")
        return next(null, os.uptime())
      }
  
      return next(null, parseFloat(uptime.split(' ')[0]))
    })
  }
docs: Fallback on os.uptime(), though /proc/uptime is more precise