Re^2: Question regarding handling exceptions in subroutine

[walkingthecow]

The loop is in script.pl and calls the subroutine from Script.pm. When I croak in Script.pm it makes script.pl exit, thus breaking the loop in script.pl. I'd rather have the subroutine in Script.pm return the error to a variable in script.pl. Hopefully that clears things up. I'm terrible at explaining things.

[moritz]

I'm not sure if I understood the question, but you can use eval in the script to catch the exceptions thrown from the module.

[space_monk]

The obvious answer is to remove the croak (or perhaps change it to a carp/warn).

You can run a command in backticks to trap both the output and the status code it returns. So you should be able to do something like:

my $response=`useradd fred ....`;
#check the status code (0 = success)
if ($? >>8) {
  # we could not add the user
}

[karlgoethebier]

Shouldn't it be something like this?

Update:

OK, eval...

my $result;
eval {
    $result = qx($command);
};

if ( $? >> 8 != 0 ) {
    if ($@) {
        die $@;
    }
    else {
        die qq(Something really weird happened!);
    }
}
# do stuff with $result...

Regards, Karl

[space_monk]

Thanks, you're right about the other issues, I was simply in a hurry to outline a way forward_{at least that's the excuse I'm using :-)}

Question: Why 'eval' this instead of just running this in backticks? I understand the command can fail, but in those cases it simply returns an error code.

[karlgoethebier]

Shouldn't it be:

my $result = qx($command);

if ( $? >> 8 != 0 ) {
    if ($@) {
        die $@;
    }
    else {
        die qq(Something really weird happened!);
    }
}

Regards, Karl