Windows Command Line wait for task end before next command

Question

I have some software for Windows that opens a website on exit. I want to run a batch that closes the browser after exit from example.exe

example.exe 

(wait for end of example.exe)

taskkill /im firefox.exe
taskkill /im iexplore.exe
taskkill /im chrome.exe

Answer 1

The problem you are observing is probably that at the end of your game, the browser is started as another process. It can then take a while before the browser actually starts but the game doesn't wait and just exits. So when you come at the taskkill commands, the browser is still not open. What you need is a way to verify if a browser-process already started, not a way to find out if the exemple.exe (or your game) exited or not. You can do it this way:

 :waitOnBrowser
 tasklist | findstr /B /C:"chrome.exe" /C:"firefox.exe" /C:"iexplore.exe" > nul
 REM the errorlevel will only be 0 if one of the browser has been found in the tasklist
 IF ERRORLEVEL 1 goto :waitOnBrowser

 REM At this point, you're sure at least one browser has been started
 REM taskkill can come here

IF ERRORLEVEL 1 is kind of the same as saying IF %ERRORLEVEL% GTR 1 (see IF in batch).