identify parent process in ps?

MizzGail · #1 (**permalink**) 07-03-2002

I need to write a script to monitor user processes that revert to parent process id = 1
I can do this with a grep " 1 " or awk and evaluation.
but
Is there a switch on the ps command or another command to specify parent id on proccesses?
I tried ps with the -p ppid=nnnnn but it doesnt seem to work.

thanks

janr · #2 (**permalink**) 07-03-2002

On the most unix flavours the -f(ull) option will show the PPID

like
/logs: ps -f
UID PID PPID C STIME TTY TIME CMD
net400 24032 24268 2 17:02:15 pts/0 0:00 ps -f
net400 24268 13026 0 16:37:04 pts/0 0:00 -csh
/logs:

MizzGail · #3 (**permalink**) 07-03-2002

Yes. but I want to monitor processes that have PPID = 1
I want to know if there is a switch to identify PPID specific

For example: ps -ef -p 29538 will give me process id 29538
I dont see a switch in the man pages for ppid

#4 (**permalink**) 07-03-2002

Hi
I think the following thread addresses similar issue.

finding process id

Good Luck!
sskb

MizzGail · #5 (**permalink**) 07-03-2002

No. thats a lot of info. but doesnt give me an answer.
I am looking for an alternative to this:

for PID in `ps -ef |grep -v root| grep " 1 " | awk '{print $2}'`

The grep " 1" is giving me all processes running under PPID = 1.

I could also awk'{print $3}' and evaluate it for a value of 1

I found in the man pages a switch -p to identify proccesses for a PID.
I am wondering if maybe there is a switch for PPID that I'm missing when I look up the use of ps.

Perderabo · #6 (**permalink**) 07-03-2002

For a list of pid's that are not owned by root but have a ppid of 1, I would go with:

Code:

#! /usr/bin/ksh
ps -ef | sed 1d | while read user pid ppid junk ; do
      if [[ $user != root && $ppid = 1 ]] ; then
            echo $pid
      fi
done
exit 0

MizzGail · #7 (**permalink**) 07-03-2002

This works great. Thanks !

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