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Top Forums UNIX for Advanced & Expert Users Finding Out When A Process Has Finished? Post 9751 by 1cuervo on Friday 2nd of November 2001 04:59:34 AM
Old 11-02-2001
No problems - I am connecting to and running all commands as a standard UNIX user.

I have one final query concerning PIDs and use of the ksh ! variable :

90% of the time, when I parse the output of a "echo $!" command, I correctly obtain the PID number. However, sometimes the value of the ! variable is echoed back as:

"[1] 12766"

where 12766 is the PID.

Does anyone know why i get this strange prefix? I will have to change the way I parse the echo of the ! variable now, because I only want the PID, not the bracketed number 1.

many thanks.
 

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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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