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Top Forums Shell Programming and Scripting Avoiding 'sh -c' when running ps from CRON Post 302605547 by methyl on Wednesday 7th of March 2012 05:34:17 PM
Old 03-07-2012
There is no solution which will stop cron from using sh -c. It is the way cron works. When you post a crontab take note of the message you receive.


Ps: "I am using the Sun solaris OS"
This could be almost any version of a Berkeley Unix or Unix System V Operating System amongst the Sun (now Oracle) hybrids:
Solaris (operating system) - Wikipedia, the free encyclopedia

Use the uname -a command and blot anything confidential like computer names with X's.

Interrogating "ps -ef" with "grep" is not the best way to determine if another instances are running (and it is unreliable). Use semaphore files.
In your context if you really want to use ps, then ps -fu<username> reduces the possibilities for mismatches (but sometimes ps will still omit processes).


Ps. The simple answer to your question is to use grep -v but you have rejected this for some reason.

Last edited by methyl; 03-07-2012 at 06:55 PM.. Reason: grammar, ambiguity and layout
This User Gave Thanks to methyl For This Post:
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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