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Linux 2.6 - man page for pidof (linux section 8)

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

       pidof -- find the process ID of a running program.

       pidof  [-s]  [-c]  [-n] [-x] [-o omitpid[,omitpid..]]  [-o omitpid[,omitpid..]..]  program

       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, espe-
       cially 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.

       -s     Single shot - this instructs the program to only return one pid.

       -c     Only return process ids that are running with the same root directory.  This option
	      is  ignored  for	non-root  users, as they will be unable to check the current root
	      directory of processes they do not own.

       -n     Avoid stat(2) system function call on all binaries which	are  located  on  network
	      based  file  systems  like  NFS.	 Instead  of  using  this option the the variable
	      PIDOF_NETFS may be set and exported.

       -x     Scripts too - this causes the program to also return process id's of shells running
	      the named scripts.

       -o omitpid
	      Tells  pidof  to	omit processes with that process id. The special pid %PPID can be
	      used to name the parent process of the pidof program, in other  words  the  calling
	      shell or shell script.

       0      At least one program was found with the requested name.

       1      No program was found with the requested name.

       pidof  is actually the same program as killall5; the program behaves according to the name
       under which it is called.

       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.
       Note that that the executable name of running processes is calculated with readlink(2), so
       symbolic links to executables will also match.

       shutdown(8), init(8), halt(8), reboot(8), killall5(8)

       Miquel van Smoorenburg, miquels@cistron.nl

					   01 Sep 1998					 PIDOF(8)

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