Batch program to to check if process exists

Question

I want a batch program  which will check if the process notepad exe exists   if notepad exe exists  it will end the process    else the batch program will close itself   Here is what I ve done    echo off tasklist  fi  imagename eq notepad exe   gt  nul if errorlevel 1 taskkill  f  im  notepad exe  exit   But it doesn t work  What is the wrong in my code

User · Answer

Try this    echo off set run  tasklist  fi  imagename eq notepad exe    find      gt  nul if errorlevel 1 set run yes if   run     yes  echo notepad is running if   run       echo notepad is not running pause

User · Answer

That s why it s not working because you code something that is not right  that s why it always exit and the script executer will read it as not operable batch file that prevent it to exit and stop so it must be  tasklist  fi  IMAGENAME eq Notepad exe  2 gt NUL   find  I  N  Notepad exe  gt NUL if   ERRORLEVEL     0    msg   Program is running goto Exit   else if   ERRORLEVEL     1    msg   Program is not running goto Exit     rather than   echo off tasklist  fi  imagename eq notepad exe   gt  nul if errorlevel 1 taskkill  f  im  notepad exe  exit

User · Answer

TASKLIST doesn t set an exit code that you could check in a batch file  One workaround to checking the exit code could be parsing its standard output  which you are presently redirecting to NUL   Apparently  if the process is found  TASKLIST will display its details  which include the image name too  Therefore  you could just use FIND or FINDSTR to check if the TASKLIST s output contains the name you have specified in the request  Both FIND and FINDSTR set a non-null exit code if the search was unsuccessful  So  this would work    echo off tasklist  fi  imagename eq notepad exe    find  i  notepad exe    nul if not errorlevel 1  taskkill  f  im  notepad exe   else     specific commands to perform if the process was not found   exit   There s also an alternative that doesn t involve TASKLIST at all  Unlike TASKLIST  TASKKILL does set an exit code  In particular  if it couldn t terminate a process because it simply didn t exist  it would set the exit code of 128  You could check for that code to perform your specific actions that you might need to perform in case the specified process didn t exist    echo off taskkill  f  im  notepad exe    nul if errorlevel 128     specific commands to perform if the process   was not terminated because it was not found   exit

User · Answer

TASKLIST does not set errorlevel   echo off tasklist  fi  imagename eq notepad exe   find      gt  nul if errorlevel 1 taskkill  f  im  notepad exe  exit   should do the job  since     should appear in TASKLIST output only if the task is NOT found  hence FIND will set the errorlevel to 0 for not found and 1 for found  Nevertheless   taskkill  f  im  notepad exe   will kill a notepad task if it exists - it can do nothing if no notepad task exists  so you don t really need to test - unless there s something else you want to do   like perhaps  echo off tasklist  fi  imagename eq notepad exe   find      gt  nul if errorlevel 1 taskkill  f  im  notepad exe  amp exit   which would appear to do as you ask - kill the notepad process if it exists  then exit - otherwise continue with the batch

User · Answer

This is a one line solution   It will run taskkill only if the process is really running otherwise it will just info that it is not running   tasklist   find  i  notepad exe   amp  amp  taskkill  im notepad exe  F    echo process  notepad exe  not running    This is the output in case the process was running   notepad exe           1960 Console                   0    112 260 K SUCCESS  The process  notepad exe  with PID 1960 has been terminated    This is the output in case not running   process  notepad exe  not running

[windows] Batch program to to check if process exists

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