javascript - node.js - Accessing the exit code and stderr of a system command -

the code snippit shown below works great obtaining access stdout of system command. there way can modify code access exit code of system command , output system command sent stderr? input.

#!/usr/bin/node var child_process = require('child_process'); function systemsync(cmd) {   return child_process.execsync(cmd).tostring(); }; console.log(systemsync('pwd')); 

you not need async. can keep execsync function.

wrap in try, , error passed catch(e) block contain information you're looking for.

var child_process = require('child_process'); function systemsync(cmd) {   try {   return child_process.execsync(cmd).tostring();   } catch (e) {     e.status;//might 127 in example     e.message;//has message     e.stderr;//has stderr     e.stdout;//has stdout   } }; console.log(systemsync('pwd')); 

if error not sent, then:

• status guaranteed 0
• stdout what's returned function
• stderr empty because successful.

in very, rare event command line executable returns stderr , yet exits status 0 (success), , want read it, need async function.