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Full Discussion: Preparing a list of spawned processes
Top Forums Shell Programming and Scripting Preparing a list of spawned processes Post 302464869 by huskie69 on Thursday 21st of October 2010 07:24:45 AM
Old 10-21-2010
Preparing a list of spawned processes
Hi All

I'm currently trying to develop a script which will find the child processes of a process ID already passed to the script.

I then need the script to look for spawned processes of these child processes and so on until it can't find any more.

For example

At the moment, I have to manually do this on the server -

Code:
ps -ef | grep 7133 | grep -v grep
USER  7134  7133  0 08:12:38 ?        0:19 child process 1
USER 7133  7128  0 08:12:38 ?        0:00 main processes

I need to find child/spawned processes of 7133 so straight away, I need to grep for 7134.

Code:
ps -ef | grep 7134 | grep -v grep
USER  7137  7134 0 08:12:38 ?        0:19 child process 2
USER 7134  7133  0 08:12:38 ?        0:00 child process 1

Next, I get 7137

You get the idea. There are also cases where one parent process spawns multiple child processes and I need to be able to trace these down individually.

I then need to build a list of all these process ids so that I can kill -9 them.

I've build a script part way and thought I'd be able to assign the processes IDs to a variable using something like this:

Code:
        REP1=$(ps -ef | grep report | grep -v grep | awk '{print $2}')
        REP2=$(ps -ef | grep $REP1 | grep -v grep | awk '{print $2}')
        REP3=$(ps -ef | grep $REP2 | grep -v grep | awk '{print $2}')
        REP4=$(ps -ef | grep $REP3 | grep -v grep | awk '{print $2}')
        REP5=$(ps -ef | grep $REP4 | grep -v grep | awk '{print $2}')

This has failed to work because of multiple processes numbers appearing on the same line.

The script is using KSH.

Any help would be greatly appreciated (as I'm quickly running out of hair!)

TIA
 

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LEARN ABOUT LINUX

zegrep

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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