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Top Forums Shell Programming and Scripting Finding process which ended another process Post 302531351 by bartus11 on Thursday 16th of June 2011 01:02:58 PM
Old 06-16-2011
It may seem like running debugger on an application, but it most certainly is not. Debuggers intercept all the application's instructions introducing huge delays. DTrace on the other hand is built deeply into Solaris kernel, firing off its code only when instructed to trace some particular event, which is done by DTrace probes. By default all the probes are disabled. When DTrace code like above is executed, Solaris kernel substitutes small piece of its own assembly code with instructions informing DTrace framework about particular event. This code is only executed when traced event happens. This behavior results in literally no overhead when tracing rare events like sending signals to applications and very small overhead when tracing larger number of very often occurring events.
 

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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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