How to exit a batch program upon error?
I've got a batch file that does several things. If one of them fails, I want to exit the whole program. For example:
@echo off
type foo.txt 2>> error.txt >> success.txt
mkdir bob
If the file foo.txt isn't found then I want the stderr message appended to the error.txt file, else the contents of foo.txt is appended to success.txt. Basically, if the type command returns a stderr then I want the batch file to exit and not create a new directory. How can you tell if an error occurred and decide if you need to continue to the nex开发者_开发技巧t command or not?
use ERRORLEVEL
to check the exit code of the previous command:
if ERRORLEVEL 1 exit /b
EDIT: documentation says "condition is true if the exit code of the last command is EQUAL or GREATER than X" (you can check this with if /?
). aside from this, you could also check if the file exists with
if exist foo.txt echo yada yada
to execute multple commands if the condition is true:
if ERRORLEVEL 1 ( echo error in previous command & exit /b )
or
if ERRORLEVEL 1 (
echo error in previous command
exit /b
)
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