226 lines
4.9 KiB
Groff
226 lines
4.9 KiB
Groff
.\" Manual page for pgrep / pkill.
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.\" Licensed under version 2 of the GNU General Public License.
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.\" Copyright 2000 Kjetil Torgrim Homme
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.\"
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.TH PGREP "1" "September 2011" "procps-ng" "User Commands"
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.SH NAME
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pgrep, pkill \- look up or signal processes based on name and other attributes
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.SH SYNOPSIS
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.B pgrep
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[options] pattern
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.br
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.B pkill
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[options] pattern
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.SH DESCRIPTION
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.B pgrep
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looks through the currently running processes and lists the process IDs which
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matches the selection criteria to stdout. All the criteria have to match.
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For example,
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.IP
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$ pgrep \-u root sshd
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.PP
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will only list the processes called
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.B sshd
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AND owned by
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.BR root .
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On the other hand,
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.IP
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$ pgrep \-u root,daemon
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.PP
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will list the processes owned by
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.B root
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OR
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.BR daemon .
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.PP
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.B pkill
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will send the specified signal (by default
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.BR SIGTERM )
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to each process instead of listing them on stdout.
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.SH OPTIONS
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.TP
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\fB\-\fR\fIsignal\fP
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.TQ
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\fB\-\-signal\fR \fIsignal\fR
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Defines the signal to send to each matched process. Either the numeric or
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the symbolic signal name can be used.
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.RB ( pkill
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only.)
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.TP
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\fB\-c\fR, \fB\-\-count\fR
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Suppress normal output; instead print a count of matching processes. When
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count does not match anything, e.g. returns zero, the command will return
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non-zero value. (\fBpgrep\fP only.)
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.TP
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\fB\-d\fR, \fB\-\-delimeter\fR \fIdelimiter\fP
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Sets the string used to delimit each process ID in the output (by default a
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newline).
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.RB ( pgrep
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only.)
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.TP
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\fB\-f\fR, \fB\-\-full\fR
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The
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.I pattern
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is normally only matched against the process name. When
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.B \-f
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is set, the full command line is used.
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.TP
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\fB\-g\fR, \fB\-\-pgroup\fR \fIpgrp\fP,...
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Only match processes in the process group IDs listed. Process group 0 is
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translated into
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.BR pgrep 's
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or
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.BR pkill 's
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own process group.
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.TP
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\fB\-G\fR, \fB\-\-group\fR \fIgid\fP,...
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Only match processes whose real group ID is listed. Either the numerical or
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symbolical value may be used.
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.TP
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\fB\-l\fR, \fB\-\-\fRlist\-name\fR
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List the process name as well as the process ID.
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.RB ( pgrep
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only.)
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\fB\-n\fR, \fB\-\-newest\fR
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Select only the newest (most recently started) of the matching processes.
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.TP
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\fB\-o\fR, \fB\-\-oldest\fR
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Select only the oldest (least recently started) of the matching processes.
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.TP
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\fB\-P\fR, \fB\-\-parent\fR \fIppid\fP,...
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Only match processes whose parent process ID is listed.
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.TP
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\fB\-s\fR, \fB\-\-session\fR \fIsid\fP,...
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Only match processes whose process session ID is listed. Session ID 0
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is translated into
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.BR pgrep 's
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or
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.BR pkill 's
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own session ID.
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.TP
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\fB\-t\fR, \fB\-\-terminal\fR \fIterm\fP,...
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Only match processes whose controlling terminal is listed. The terminal name
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should be specified without the "/dev/" prefix.
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.TP
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\fB\-u\fR, \fB\-\-euid\fR \fIeuid\fP,...
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Only match processes whose effective user ID is listed. Either the numerical
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or symbolical value may be used.
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.TP
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\fB\-U\fR, \fB\-\-uid\fR \fIuid\fP,...
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Only match processes whose real user ID is listed. Either the numerical or
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symbolical value may be used.
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.TP
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\fB\-v\fR, \fB\-\-inverse\fR\fR
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Negates the matching.
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.TP
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\fB\-x\fR, \fB\-\-exact\fR\fR
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Only match processes whose name (or command line if \-f is specified)
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.B exactly
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match the
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.IR pattern .
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.TP
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\fB\-F\fR, \fB\-\-pidfile\fR \fIfile\fR
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Read
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.IR PID 's
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from file. This option is perhaps more useful for
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.B pkill
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than
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.BR pgrep .
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.TP
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\fB\-L\fR, \fB\-\-logpidfile\fR
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Fail if pidfile (see -F) not locked.
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.TP
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\fB\-V\fR, \fB\-\-version\fR
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Display version information and exit.
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.TP
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\fB\-h\fR, \fB\-\-help\fR
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Display help and exit.
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.PD
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.SH OPERANDS
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.TP
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.I pattern
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Specifies an Extended Regular Expression for matching against the process
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names or command lines.
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.SH EXAMPLES
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Example 1: Find the process ID of the
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.B named
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daemon:
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.IP
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$ pgrep \-u root named
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.PP
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Example 2: Make
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.B syslog
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reread its configuration file:
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.IP
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$ pkill \-HUP syslogd
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.PP
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Example 3: Give detailed information on all
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.B xterm
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processes:
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.IP
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$ ps \-fp $(pgrep \-d, \-x xterm)
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.PP
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Example 4: Make all
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.B netscape
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processes run nicer:
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.IP
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$ renice +4 $(pgrep netscape)
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.SH "EXIT STATUS"
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.PD 0
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.TP
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0
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One or more processes matched the criteria.
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.TP
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1
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No processes matched.
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.TP
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2
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Syntax error in the command line.
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.TP
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3
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Fatal error: out of memory etc.
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.PD
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.SH NOTES
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The process name used for matching is limited to the 15 characters present in
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the output of /proc/\fIpid\fP/stat. Use the \-f option to match against the
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complete command line, /proc/\fIpid\fP/cmdline.
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.PP
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The running
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.B pgrep
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or
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.B pkill
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process will never report itself as a
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match.
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.SH BUGS
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The options
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.B \-n
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and
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.B \-o
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and
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.B \-v
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can not be combined. Let
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me know if you need to do this.
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.PP
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Defunct processes are reported.
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.SH "SEE ALSO"
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.BR ps (1),
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.BR regex (7),
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.BR signal (7),
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.BR killall (1),
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.BR skill (1),
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.BR kill (1),
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.BR kill (2)
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.SH STANDARDS
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.B pkill
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and
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.B pgrep
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were introduced in Sun's Solaris 7. This implementation is fully compatible.
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.SH AUTHOR
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.UR kjetilho\@ifi.uio.no
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Kjetil Torgrim Homme
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.UE
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.SH "REPORTING BUGS"
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Please send bug reports to
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.UR procps\@freelists.org
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.UE
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