Script for capturing pid of particular process

[Vincent Farrugia]

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?

[Justo Exposito · Accepted solution]

Hi Vincent,

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

Regards,

Justo.

[Ceesjan van Hattum]

Hi, try this:

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

Greetings,
Ceesjan

[Nick Wickens]

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).

[V. V. Ravi Kumar_1]

hi,
try this.

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

regds

[Vincent Farrugia]

Thank you.

[Bill Hassell]

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).

[Wodisch_1]

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

[Anand Hotchandani]

Hi,

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

echo $var

Hope this will helps you.

Regards
Anand Hotchandani