I have a batch file that runs a couple executables, and I want it to exit on success, but stop if the exit code <> 0. How do I do this?
+3
A:
Sounds like you'll want the "If Errorlevel" command. Assuming your executable returns a non-0 exit code on failure, you do something like:
myProgram.exe
if errorlevel 1 goto somethingbad
echo Success!
exit
:somethingbad
echo Something Bad Happened.
Errorlevel checking is done as a greater-or-equal check, so any non-0 exit value will trigger the jump. Therefore, if you need to check for more than one specific exit value, you should check for the highest one first.
Hellion
2010-08-10 18:20:05
Also, since around Windows 2000, there's a "virtual" environment variable called `%ERRORLEVEL%` that can be tested with `==`, `EQU`, `LSS`, etc.
Jim Davis
2010-08-10 19:13:59
Perfect! Thanks.
Ziplin
2010-08-10 21:24:33
Oh, for posterity, to make it stop on error, after :somethingbad, use a "pause" command
Ziplin
2010-08-11 20:08:59
You don't want to use `exit` in there as that kills the shell. Either use `goto :EOF` or `exit /b` so that just the batch file terminates.
Joey
2010-08-11 21:44:44
@Jim: You should always delete that variable with `set ERRORLEVEL=` at the start of your batch if you intend to use it, as the function of the pseudo-variable can be shadowed by creating an actual variable with that name. And since the environment is passed from the parent process ... you can never be sure.
Joey
2010-08-11 21:45:47
Woah! I hadn't thought of that. That's awful.
Jim Davis
2010-08-16 19:04:05
+2
A:
You can also use conditional processing symbols to do a simple success/failure check. For example:
myProgram.exe && echo Done!
would print Done! only if myProgram.exe returned with error level 0.
myProgram.exe || PAUSE
would cause the batch file to pause if myProgram.exe returns a non-zero error level.
Cheran S
2010-08-11 05:55:31