MAN page from Fedora 15 sysvinit-tools-2.88-3.dsf.fc15.x86_64.rpm
Section: Linux System Administrator's Manual (8)
Updated: 01 Sep 1998Index
pidof -- find the process ID of a running program.
finds the process id's (pids) of the named programs. It prints thoseid's on the standard output. This program is on some systems used inrun-level change scripts, especially when the system has aSystem-V
structure. In that case these scripts arelocated in /etc/rc?.d, where ? is the runlevel. If the system hasastart-stop-daemon
(8) program that should be used instead.
- Single shot - this instructs the program to only return one pid.
- 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 checkthe current root directory of processes they do not own.
- Avoidstat(2)system function call on all binaries which are located on networkbased file systems likeNFS.Instead of using this option the the variablePIDOF_NETFSmay be set and exported.
- Scripts too - this causes the program to also return process id's ofshells running the named scripts.
- -o omitpid
- Tells pidof to omit processes with that process id. The specialpid %PPID can be used to name the parent process of the pidofprogram, in other words the calling shell or shell script.
- When used with -o, will also omit any processes that have the sameargv and argv as any explicitly omitted process ids. This can beused to avoid multiple shell scripts concurrently calling pidof returningeach other's pids.
- At least one program was found with the requested name.
- No program was found with the requested name.
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 itshould find the pid of, it is reasonably safe. Otherwise it is possiblethat it returns pids of running programs that happen to have the same nameas the program you're after but are actually other programs. Note thatthat the executable name of running processes is calculated withreadlink(2),so symbolic links to executables will also match.
Miquel van Smoorenburg, miquelsAATTcistron.nl
- EXIT STATUS
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