topic Re: Script for capturing pid of particular process in Operating System - HP-UX

Script for capturing pid of particular process

Vincent Farrugia — Mon, 29 Jul 2002 11:00:01 GMT

Hello,

I want to capture ONLY the process id of a particular process and store it in a variable.

Example, if the process id of the process "aaa" is 5643, the variable should store 5643.

How would you do this?

Re: Script for capturing pid of particular process

Justo Exposito — Mon, 29 Jul 2002 11:04:36 GMT

Hi Vincent,

Try this:
PID=$( ps -ef |grep "aaa" | grep -v grep| sed 's/\ \{1,\}/#/g'| cut -d"#" -f3)
echo $PID

Regards,

Justo.

Re: Script for capturing pid of particular process

Ceesjan van Hattum — Mon, 29 Jul 2002 11:08:54 GMT

Hi, try this:

PID=`ps -ef | grep $PROCNAME | grep -v grep | awk '{print $2}'`
echo $PID

Greetings,
Ceesjan

Re: Script for capturing pid of particular process

Nick Wickens — Mon, 29 Jul 2002 11:18:41 GMT

or this -

PID=$(ps -ef|grep thingtogrepfor | grep -v grep|cut -c10-14

So many ways to skin that cat (as we say in the UK).

Re: Script for capturing pid of particular process

V. V. Ravi Kumar_1 — Mon, 29 Jul 2002 11:32:33 GMT

hi,
try this.

pid=`ps -ef|grep "process name"|awk '{print $2}'`

regds

Re: Script for capturing pid of particular process

Vincent Farrugia — Mon, 29 Jul 2002 12:03:29 GMT

Thank you.

Re: Script for capturing pid of particular process

Bill Hassell — Mon, 29 Jul 2002 13:52:07 GMT

Oops. ps -ef | grep -v grep | grep is VERY unreliable. The problem is that grep doesn't know that you specifically want just the process name, and not the path or the arguments or even the user ID. Try this:

ps -ef | grep -v grep | grep sh

(to look for all the sh programs (but it finds ksh and csh and bash and users with the name cash and shenn, etc

Use this instead:

PIDVAR=$(UNIX95= ps -C MyProcessName | tail -1 | grep -v PID | awk '{print $1}')

where MyProcessName is the name of your selected process. This script will return the last match (in case there are two or more processes) and PIDVAR will be null if the process is not running. By using the XPG4 option -C, you are asking ps to do the searching for you and it will always match the basename of the process you are looking for.

In the above example, here is what you need:

UNIX95= ps -fC sh

and now you see only the sh (and the login shells -sh).

Re: Script for capturing pid of particular process

Wodisch_1 — Mon, 29 Jul 2002 20:21:42 GMT

...and if you add '-o "" ' to Bill's example, you can save the "grep -v PID", as then there will be no header line...

Re: Script for capturing pid of particular process

Anand Hotchandani — Wed, 31 Jul 2002 06:51:41 GMT

Hi,

Var=`ps -ef | grep "aaa" | grep -v grep | awk '{print $2}'`

echo $var

Hope this will helps you.

Regards
Anand Hotchandani