Shell Programming and Scripting

Hi all,

I have the following snippet of code..

#!/bin/sh

echo "run perl script............"

#Run the verification script
perl bill_ver

echo " perl script completed....."

echo "rename files......"

#Remove from all file in the directories test, test1, test2, test3
for f in /usr/users/rovolis/test/*.tmp ; do newfile=`echo $f | sed 's/\(.*\)..../\1/'` ; mv $f $newfile ; done
echo "rename completed....."


The perl script returns '0' if it is completed successfully or non-zero if not.
What i would like is to perform the rename only if the perl script is completed successfully. How am i going to check this?

Thank you very much for your help