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Top Forums UNIX for Advanced & Expert Users Obtaining A Process ID (PID) Post 9408 by 1cuervo on Friday 26th of October 2001 08:38:07 AM

10-26-2001

Registered User

Obtaining A Process ID (PID)

Is there any way I can get UNIX to return the Process ID of a process when I actually issue the command to invoke the process?

For example, if I was to launch an emacs process in batch mode, by issuing the UNIX command :

% emacs file.txt&

then UNIX would return the Process ID (PID). "2343", for example.
Is this possible?

The reason I ask this question is because I am invoking programs from a remote machine and need to periodically probe for which processes are running to see whether the processes are still running or if they have terminated.

I suppose I could just issue a 'ps' command, pipe the output to a file and then grep the file for the commands issued, but the processes I am looking for depend on the directory they were invoked from and I don't think the 'ps' utility records the directory which a program/process was executed from - or does it?

Many thanks!

1cuervo

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LEARN ABOUT DEBIAN

killall5

KILLALL5(8)						Linux System Administrator's Manual					       KILLALL5(8)

NAME

       killall5 -- send a signal to all processes.

SYNOPSIS

       killall5 -signalnumber [-o omitpid[,omitpid..]]	[-o omitpid[,omitpid..]..]

DESCRIPTION

       killall5  is the SystemV killall command. It sends a signal to all processes except kernel threads and the processes in its own session, so
       it won't kill the shell that is running the script it was called from. Its primary (only) use is in the rc scripts found in the /etc/init.d
       directory.

OPTIONS

       -o omitpid
	      Tells killall5 to omit processes with that process id.

NOTES

       killall5 can also be invoked as pidof, which is simply a (symbolic) link to the killall5 program.

EXIT STATUS

       The  program  return  zero  if  it  killed  processes.  It return 2 if no process were killed, and 1 if it was unable to find any processes
       (/proc/ is missing).

SEE ALSO

       halt(8), reboot(8), pidof(8)

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl

								    04 Nov 2003 						       KILLALL5(8)

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