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List:       sidewinder
Subject:    [Sidewinder] Script To Modfy Crontab
From:       sidewinder () adeptech ! com
Date:       2005-12-13 20:31:55
Message-ID: 1A78A38FA2CE2A459EE3530159FFBCC5580556 () WPSCV6MN ! OPR ! STATEFARM ! ORG
[Download RAW message or body]

Thank you all for your help.
The solution was much easier than I expected.

#!/bin/sh
/bin/cp /etc/crontab /etc/crontab.bak
/bin/echo "INFO - /etc/crontab HAS BEEN BACKED UP to /etc/crontab.bak"
/bin/echo "
# Comment
0 2 * * SAT     root    Admn    command" >> /etc/crontab
/bin/echo "INFO - /etc/crontab HAS BEEN MODIFIED"
exit 0

Mario Covarrubias Jr., CISSP

-----Original Message-----
From: sidewinder@adeptech.com
Sent: Monday, December 12, 2005 4:38 PM
To: sidewinder@adeptech.com
Subject: Re: [Sidewinder] Scripting Crontab

Hi, all!

Kevin Kadow wrote:

> I need to write a script that will modify /etc/crontab on Sidewinder.

> I'm finding that crontab was designed to be edited from within an 
> editor.

Doesn't crontab(1) work on the Sidewinder? It runs a variant of Vixie
cron and /var/cron/tabs exists, so I would give that one a try first.

Besides that - given the necessary Unix access rights and TE context, an
automated job could modify the system wide /etc/crontab. If you can do
it with vi(1), any program can do the same. Simple matter of
programming. man sed, man awk, man sh. I have written numerous shell
scripts to run on the Sidewinder - not that different from any Unix box.
And the documentation explicitely states that cron will reread
/etc/crontab whenever modified - now, isn't that nice? ;-)

To sum it up: on Unix there is no real difference between "editing with
an editor" and "having a shell script do the same".
Get "Unix Power Tools" from O'Reilley ;-))

HTH,

Patrick M. Hausen
Leiter Netzwerke und Sicherheit
-- 
punkt.de GmbH         Internet - Dienstleistungen - Beratung
Vorholzstr. 25        Tel. 0721 9109 -0 Fax: -100
76137 Karlsruhe       http://punkt.de
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