On Mon, 2 Oct 2000, Gideon Guillen wrote:
> In MS-DOS batchfiles, there's this thing called error codes or error levels
> that's generated whenever a program or batchfiles exits/terminates. For
> example, for normal termination, it would be '0' or let's say '1' if a
> certain event was trapped by a batchfile. In MS-DOS, this is the
> environment %ERRORLEVEL%. What is it's equivalent on *NIX/Linux shells,
> preferably in bash.
It's called exit status but I don't think it's an environment variable by
default. The default exit status of 0 is interpreted as successful
completion of the program/process just executed.
There's a sample file in the bash documentation subdirectory under
examples/functions/exitstat that shows how you can check a processes
exitstatus using a bash function.
The info pages for bash also give clues how to use this.
It might be illustrative to give you an example though. I hope that the
following commands issued at the bash prompt will give you an idea of how
to use exit status in your script.
bash:~$ if ls ; then echo "all is well." ; else echo "something wrong"; fi
You could set ERRORLEVEL to something by adding a line in your script that
goes:
if foo ; then ERRORLEVEL=0 ; else ERRORLEVEL=1 ; fi
You can then proceed to do conditionals in your script by evaluating
$ERRORLEVEL.
I hope this helps.
--
eric pareja ([EMAIL PROTECTED]) <O> Here, have a clue. Get the picture.
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