node.js how to check a process is running by the process name?

Question

i run node.js in linux, from node.js how to check if a process is running from the process name ? Worst case i use child_process, but wonder if better ways ?

Thanks

Answer 1

Another improvement to @musatin solution is to use a self-invoking switch statement instead of reassigning let;

/**
 * 
 * @param {string} processName The executable name to check
 * @param {function} cb The callback function
 * @returns {boolean} True: Process running, else false
 */
  isProcessRunning(processName, cb){
      const cmd = (()=>{
          switch (process.platform) {
              case 'win32' : return `tasklist`;
              case 'darwin' : return `ps -ax | grep ${processName}`;
              case 'linux' : return `ps -A`;
              default: return false;
          }
      })();
      require('child_process').exec(cmd, (err, stdout, stderr) => {
          cb(stdout.toLowerCase().indexOf(processName.toLowerCase()) > -1);
      });
  }

cmd will be assigned the result of the switch statement and results in code that's easier to read (especially if more complex code is involved, self-invoking switch statements means you only create the variables you need and don't need to mentally keep track of what their values might be).