crontab and exit status interpretation

[tk421]

I’ve got a script that checks to make sure that cupsd is running and if it’s not to start it up again:

#!/bin/sh
/bin/ps -aux | /usr/bin/grep cupsd | /usr/bin/grep -v grep
if [ $? = 0 ]; then
:
else
/sbin/SystemStarter start PrintingServices
fi

When I test this from a shell session it works perfectly (if cups is running the exit status is 0). When I add it to root’s crontab the script runs as if the exit status was 1 no matter what.
Cron seems to be getting confused about the exit status.
Any idea why?

root’s crontab:
0-59/5 5-23 * * 1-5 /var/root/cups_heartbeat.sh

thanks a bunch!

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