How to get exit status codes in bash from Perl? - Shell Programming and Scripting

siegfried · #1 10-25-2005

I apologize if I have already posted this query. I scanned back quite a few pages but could not find such a query.

If my perl code contains "exit(33)" how can I get that value in bash for use in a "if" statement.

Thanks,
Siegfried

vgersh99 · #2 10-25-2005

echo "${?}"

Unbeliever · #3 10-26-2005

To expand, all unix shells set a particular variable '$?' to the the exit status of the command just completed. So in your case:

Code:

my_perl_prog.pl

if [ $? -eq 33 ]
then
  <do something>
fi

siegfried · #4 10-26-2005

OK thanks! $? is for the return status code, $! is for PID. Is there a web page where these single character variables are documented? How about a man and info page too?

This is beginning to look a lot like perl. I bet $$ is the current PID.

Thanks,
Siegfried

vino · #5 10-26-2005

Under man sh, section Special Parameters
Under man ksh, section Parameters

Unbeliever · #6 10-26-2005

man <your shell name>

for example

man bash
man ksh
man sh

should tell you all you need to know ... and strictly speaking it's perl that looks like the shells not the other way round :-). Otherwise google should return a wealth of information

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