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Top Forums Shell Programming and Scripting How to get process id of called process Post 302144921 by ysrinu on Monday 12th of November 2007 01:34:22 AM
Old 11-12-2007
How to get process id of called process

Hi,
inside my script s1.sh i am calling another script s2.sh
After s2.sh finishes, i want to print the process id of the s2.sh (that was used)
I can't use ps -ef command, since by this time s2.sh has already finished.
Is there a way to capture pid of s2.sh right when it's called?

I don't want to call s2.sh in the background, even if i did, by the time i use ps command to find the pid value, the s2.sh might have already finished in no time.

In windows script, the call to a process returns the associated pid immediately

Another question, how do i get the current pid without using the current process name?

Thanks,
-srinivas yelamanchili
 

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PIDOF(8)						Linux System Administrator's Manual						  PIDOF(8)

NAME
pidof -- find the process ID of a running program. SYNOPSIS
pidof [-s] [-x] [-o omitpid] [-o omitpid..] program [program..] DESCRIPTION
Pidof finds the process id's (pids) of the named programs. It prints those id's on the standard output. This program is on some systems used in run-level change scripts, especially when the system has a System-V like rc structure. In that case these scripts are located in /etc/rc?.d, where ? is the runlevel. If the system has a start-stop-daemon (8) program that should be used instead. OPTIONS
-s Single shot - this instructs the program to only return one pid. -x Scripts too - this causes the program to also return process id's of shells running the named scripts. -o Tells pidof to omit processes with that process id. The special pid %PPID can be used to name the parent process of the pidof pro- gram, in other words the calling shell or shell script. NOTES
pidof is simply a (symbolic) link to the killall5 program, which should also be located in /sbin. When pidof is invoked with a full pathname to the program it should find the pid of, it is reasonably safe. Otherwise it is possible that it returns pids of running programs that happen to have the same name as the program you're after but are actually other programs. SEE ALSO
shutdown(8), init(8), halt(8), reboot(8) AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl 01 Sep 1998 PIDOF(8)
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