Cron running shell scripts.

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# 1  
Old 09-26-2001
Question Cron running shell scripts.

What are the rules of calling shell scripts in cron.

How do I go about setting up the correct PATHS that calls a script, which then calls another sub script all of which has to retain the orginal PATHS and VARS that I've set up in first script


Well Cron calls a script called script.cron - This script contains environment setups etc, and then calls another script script2.ksh

I want the script2.ksh to retain all the environments etc that was set in script.cron
# 2  
Old 09-26-2001
What you have should work. I have the same setup.
I kick off a script, say, which contains all the necessary paths, variables, etc and this script kicks off the next one which kicks off the next one, etc.


00 22 * * 1-5 ksh $HOME/bin/ > $HOME/log/first.log 2>&1

This has been working for as long as I can remember and I think you are on the right track. scripts:


. $HOME/bin/

you get the idea.
# 3  
Old 09-26-2001
You need to use the "export" command in the first script to put a variable in the environment. The second script will inherit the environment from its parent.

The other thing worth mentioning is that a cron script must be self-sufficient. Don't depend on setup stuff from .profile. So set variables like PATH in the script. Don't rely on the the PATH you inherit from cron.
# 4  
Old 09-26-2001
I suppose you can use 'export' but my script doesn't have it and my 100 or so scripts that come after runs fine.

Also, isn't there a limit to how many processes you can chain together? After a certain amount of this type of call:

. $HOME/bin/

I have to do this:

ksh $HOME/bin/

for recursive issues?? otherwise I get an error...Do you know why? Not sure of the exact count but to be safe I remember to use explicit calls intermittently after so many implicit calls. Don't go overboard with 'ksh' too though.
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