09-30-2004
Script behaving differently in Crontab..
I posted this in Shell scripting... maybe I'll try it in this forum..
*****************
I wrote a script to stop a process,truncate its log files and re-start the process...
We are using Progress Software in Unix ( Sun Sparc)
When ever I start this progress program , it should kick off a C pgm in the background..
The script work perfectly fine when I run it from command prompt..
When I scheduled it from crontab, the stopping and truncating log files works fine..
When it starts of the progress program, that time also it looks OK..
But when I do (ps -ef ) for that C program, I found two instances of the C program running.. One is the actual C program which I wanted it to run and other is the same C program with slightly different process name...
> ps -ef | grep 'myprocess'
admin1 .......... myprocess
admin1 .......... usr/bin/sh -C myprocess
Also, the second process is the parent for first process...
Any ideas why it is working differently in crontab ??
If my explanation is not clear, let me know... I could post some screen dumps which might explain more...
Thanks in advance,
************************
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LEARN ABOUT SUSE
set::crontab
Crontab(3) User Contributed Perl Documentation Crontab(3)
NAME
Set::Crontab - Expand crontab(5)-style integer lists
SYNOPSIS
$s = Set::Crontab->new("1-9/3,>15,>30,!23", [0..30]);
if ($s->contains(3)) { ... }
DESCRIPTION
Set::Crontab parses crontab-style lists of integers and defines some utility functions to make it easier to deal with them.
Syntax
Numbers, ranges, *, and step values all work exactly as described in crontab(5). A few extensions to the standard syntax are described
below.
< and >
<N selects the elements smaller than N from the entire range, and adds them to the set. >N does likewise for elements larger than N.
! !N excludes N from the set. It applies to the other specified range; otherwise it applies to the specified ranges (i.e. "!3" with a
range of "1-10" corresponds to "1-2,4-10", but ">3,!7" in the same range means "4-6,8-10").
Functions
new($spec, [@range])
Creates a new Set::Crontab object and returns a reference to it.
contains($num)
Returns true if $num exists in the set.
list()
Returns the expanded list corresponding to the set.
The functions described above croak if they are called with incorrect arguments.
SEE ALSO
crontab(5)
AUTHOR
Abhijit Menon-Sen <ams@toroid.org>
Copyright 2001 Abhijit Menon-Sen <ams@toroid.org>
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.12.1 2008-07-30 Crontab(3)