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Operating Systems Linux Multiple process found when executed from script Post 302972478 by varathaneie on Thursday 5th of May 2016 09:09:42 PM
Old 05-05-2016
Multiple process found when executed from script

Hi All,

I came across a weird scenario which i couldnt explain why.
As part of script which is run as /bin/sh shebang, we are trying to check if there is any process that runs with the same name ignoring the current process and kill it.
But for some reason, there are 2 process returned as part of echo and kill command for same process name. But if we do just ps -edf we just get one.

Please find belwo the commands

Code:
 
 echo ` ps -edf | grep process_name | grep -v pattern | grep \? | grep -v grep `
  
 kill -9 `ps -edf | grep process_name | grep -v  pattern | grep \? | grep -v grep | nawk '{print $2}' | sed "s/$$//g"`

Both the above command returns 2 process(the output of command within ``), one is the current process which is created when the script is executed and the second one comes as a child of the first process but with same command. The second process gets killed forcefully and its causing a failure trigger for my job which uses that script.

If i use below command on the same script, i just get the current process.
Code:
ps -edf | grep process_name | grep -v pattern | grep \? | grep -v grep

Any inputs is highly appreciated

Regards,
Pradeep
 

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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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