.\"
.\" Copyright (c) 2018-2023 Jim Warner <james.warner@comcast.net>
.\" Copyright (c) 2019-2023 Craig Small <csmall@dropbear.xyz>
.\" Copyright (c) 2013      Jaromir Capik <jcapik@redhat.com>
.\" Copyright (c) 1998      Miquel van Smoorenburg
.\"
.\" This program is free software; you can redistribute it and/or modify
.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation; either version 2 of the License, or
.\" (at your option) any later version.
.\"
.\"
.TH PIDOF 1 "2023-01-16" "" "User Commands"
.SH NAME
pidof \- find the process ID of a running program
.SH SYNOPSIS
.B pidof
.RB [ \-s ]
.RB [ \-c ]
.RB [ \-q ]
.RB [ \-w ]
.RB [ \-x ]
.RB [ \-o
.IR omitpid[,omitpid...]... ]
.RB [ \-t ]
.RB [ \-S
.IR separator ]
.I program
.IB [ program... ]
.SH DESCRIPTION
.B Pidof
finds the process id's (pids) of the named programs. It prints those
id's on the standard output.
.SH OPTIONS
.IP \fB\-s\fP
Single shot - this instructs the program to only return one \fIpid\fP.
.IP \fB\-c\fP
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.
.IP \fB\-q\fP
Quiet mode, suppress any output and only sets the exit status accordingly.
.IP \fB\-w\fP
Show also processes that do not have visible command line (e.g. kernel
worker threads).
.IP \fB\-x\fP
Scripts too - this causes the program to also return process id's of
shells running the named scripts.
.IP "\fB-o\fP \fIomitpid\fP"
Tells \fBpidof\fP to omit processes with that process id. The special
pid \fB%PPID\fP can be used to name the parent process of the \fBpidof\fP
program, in other words the calling shell or shell script.
.IP \fB\-t\fP
Shows all thread ids instead of pids.
.IP "\fB-S\fP \fIseparator\fP"
Use \fIseparator\fP as a separator put between pids. Used only when
more than one pids are printed for the program.
The \fB\-d\fR option is an alias for this option for sysvinit
.B pidof
compatibility.
.SH "EXIT STATUS"
.TP
.B 0
At least one program was found with the requested name.
.TP
.B 1
No program was found with the requested name.

.SH BUGS
When using the \fB\-x\fP option,
.B pidof
only has a simple method for detecting scripts and will miss scripts that,
for example, use env. This limitation is due to how the scripts look in
the proc filesystem.

.SH SEE ALSO
.BR pgrep (1),
.BR pkill (1)
.SH AUTHOR
.UR jcapik@redhat.com
Jaromir Capik
.UE