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Old 04-28-2008, 05:55 PM   #1
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seg fault / mem fault - in cron, but works in shell?

Strange problem --

A detailed shell script in ksh which calls a specific program works just fine when run interactively. Now, if you run this same program in cron, it seg faults!

Yes, I have resolved all issues of environment with the sh vs ksh inside of cron. The irony is even with #!/bin/ksh in the script AND forcing it with a /bin/ksh on the crontab entry the program still does a memory fault. If I let it try to execute under default of /bin/sh, it does a seg fault. But the program works flawlessly if you execute the script in an interactive session.

1. there are no inputs other than reading from files and writing to database.

2. the only difference is a cron entry vs. ./script_name

What could be causing this? Any thoughts or ideas?

AS 4 - updated with all patches. vixie_cron 4.1.x, so I am at my wits end on this.

Old 04-29-2008, 04:24 PM   #2
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You say you've resolved all issues of environment sh vs ksh.

That doesn't sound like you've worked on environment variables (e.g. PATH).

Cron scripts don't inherit these variables the way your command line does because you're not sourcing /etc/profile, /etc/bashrc, $HOME/.profile and/or $HOME/.bashrc in cron.

You need to insure you set all necessary environment variables in your script OR source them from an external file.

A good way to see what you need is to type "env" when logged in at command line. Look at the environment information it gives and put whatever you think necessary in the script.

The number one issue with scripts run from cron vs command line is PATH. The PATH you have at command line (echo $PATH) is apt to have many things in it whereas the PATH cron uses is rudimentary.


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