topic Re: kill shell script in Operating System - HP-UX

kill shell script

Brent W. Moll — Wed, 12 Nov 2003 11:12:07 GMT

I need to determine the PID for a process in a shell script, then kill the process.

Example:

[sdatpp01][/home/root] #ps -ef | grep dsmc
root 12117 1 13 Nov 6 ? 40:01 dsmc sched
root 27781 23503 2 10:13:11 pts/0 0:00 grep dsmc
[sdatpp01][/home/root]

In this case I need to put the PID 12117 in a variable PID$

how do I do this in a script ?

Re: kill shell script

Steven E. Protter — Wed, 12 Nov 2003 11:13:21 GMT

Here is a script. It might work off the shelf, or require minor modification.

Attached.

SEP

Re: kill shell script

Mark Greene_1 — Wed, 12 Nov 2003 11:15:48 GMT

In sh and ksh, $PID is the script process, $PPID is the process that ran the script.

If you are looking to extract a PID from a ps listing, try this:

_PID=`ps -ef|grep $_STRING|tr -s " "|cut -d" " -f3`

mark

Re: kill shell script

Pete Randall — Wed, 12 Nov 2003 11:17:25 GMT

Brent,

Here's a sample of one of our kill scripts:

for PID in `ps -ef |grep web_command | grep -v grep |awk '{ print $2 }'`
do
kill -9 $PID
echo "web_command.ksh stopped"
done

Note that the usage of kill -9 is not recommended because it does not allow for the normal housekeeping when a process terminates and may leave memory allocated, etc, etc.

Pete

Re: kill shell script

Graham Cameron_1 — Wed, 12 Nov 2003 11:24:17 GMT

Pete you are so brutal.

Round here we like to give things chance to die first.

Instead of
kill -9 ${PID}

we would have
for sig in 1 2 3 15 9
do
kill -${sig} {PID} 2>/dev/null
done

-- Graham

Re: kill shell script

Michael Schulte zur Sur — Wed, 12 Nov 2003 11:24:38 GMT

Hi Brent,

you need field #2 in the ps output.

ps -ef | grep jobname | grep -v grep | awk '{print $2}'

field #3 is the parent process.

Michael

Re: kill shell script

Pete Randall — Wed, 12 Nov 2003 11:29:17 GMT

Graham,

True, it's brutal but it's a shutdown script for an unimportant process (and I did note that it's not recommended). Since we're shutting down anyway, why would I care? In other circumstances you method would be much more appropriate.

Pete

Re: kill shell script

Michael Schulte zur Sur — Wed, 12 Nov 2003 11:36:24 GMT

Hi Pete,

What do you think, if the process listens to kill -3, should be better, right?
Well, early bird catches the worm. I was thinking to long. ;-) grumble mumble..

greetings,

Michael

Re: kill shell script

Pete Randall — Wed, 12 Nov 2003 11:44:05 GMT

Michael,

What I think is that when I'm shutting down, I don't care what happens to the process. I don't care if it shuts down gracefully and release any memory regions and cleans up after itself. I'm shutting down, not worrying about etiquette or hurting a process's feelings. I want the damn thing to die and die now.

Other processes (like the database, for example) I obviously want to shut down normally but trivial ones like this I don't care about. The whole point here was to answer Brent's original question about getting the PID.

End of subject - please.

Pete

Re: kill shell script

Michael Schulte zur Sur — Wed, 12 Nov 2003 11:47:32 GMT

Hi Pete,

I totally agree with you. It doesnt matter. I am talking about ending a process which is running in the backgound and stopping it with -9 might hurt in cases like disk defrag. That was not meant to critisize you in any way. ;-)

Michael

Re: kill shell script

rmueller58 — Thu, 13 Nov 2003 09:36:46 GMT

--------------------------------------------------------------------------------
If you want to kill all processes related to a specific user we set up the following..

# killit /usr/local/bin/killit
# ESU#3 - Systems and Networking
# rcm(10/03/2001)
# this script was written to kill hung users
#
#==============================================
# BEGIN SCRIPT
ps -ef |grep -v -f /usr/local/bin/patt.1 |grep $1 > temp.1
kill -9 `awk '{print $2}' temp.1`
rm temp.1
# END SCRIPT
#==============================================

note ** /usr/local/bin/patt.1 file contains patterns that you want to avoid. it allows you to exclude items that you want to avoid killing..