pkill



PKILL(1)                   OpenBSD Reference Manual                   PKILL(1)


NAME

     pgrep, pkill - find or signal processes by name


SYNOPSIS

     pgrep [-flnoqvx] [-d delim] [-G gid] [-g pgrp] [-P ppid] [-s sid]
           [-T rtable] [-t tty] [-U uid] [-u euid] [pattern ...]
     pkill [-signal] [-fIlnoqvx] [-G gid] [-g pgrp] [-P ppid] [-s sid]
           [-T rtable] [-t tty] [-U uid] [-u euid] [pattern ...]


DESCRIPTION

     The pgrep command searches the process table on the running system and
     prints the process IDs of all processes that match the criteria given on
     the command line.

     The pkill command searches the process table on the running system and
     signals all processes that match the criteria given on the command line.

     The following options are available:

     -d delim
             Specify a delimiter to be printed between each process ID.  The
             default is a newline.  This option can only be used with the
             pgrep command.

     -f      Match against full argument lists.  The default is to match
             against process names.

     -G gid  Restrict matches to processes with a real group ID in the comma-
             separated list gid.

     -g pgrp
             Restrict matches to processes with a process group ID in the
             comma-separated list pgrp.  The value zero is taken to mean the
             process group ID of the running pgrep or pkill command.

     -I      Ask for confirmation before killing a process.

     -l      Long output.  Print the process name in addition to the process
             ID for each matching process.  If used in conjunction with -f,
             print the process ID and the full argument list for each matching
             process (pgrep only).

     -n      Match only the most recently created (newest) process, if any.
             Cannot be used in conjunction with -o.

     -o      Match only the least recently created (oldest) process, if any.
             Cannot be used in conjunction with -n.

     -P ppid
             Restrict matches to processes with a parent process ID in the
             comma-separated list ppid.

     -q      Quiet mode.  Perform the action, but don't display anything on
             standard output.  Note that -q takes precedence over other
             display options such as -l.

     -s sid  Restrict matches to processes with a session ID in the comma-
             separated list sid.  The value zero is taken to mean the session
             ID of the running pgrep or pkill command.

     -T rtable
             Restrict matches to processes associated with the specified
             routing tables in the comma-separated list rtable.

     -t tty  Restrict matches to processes associated with a terminal in the
             comma-separated list tty.  Terminal names may be of the form
             `ttyxx' or the shortened form `xx'.  A single dash (`-') matches
             processes not associated with a terminal.

     -U uid  Restrict matches to processes with a real user ID in the comma-
             separated list uid.

     -u euid
             Restrict matches to processes with an effective user ID in the
             comma-separated list euid.

     -v      Reverse the sense of the matching; display or signal processes
             that do not match the given criteria.

     -x      Require an exact match of the process name, or argument list if
             -f is given.  The default is to match any substring.

     -signal
             A non-negative decimal number or symbolic signal name specifying
             the signal to be sent instead of the default TERM.  This option
             is valid only when given as the first argument to pkill.

     If any pattern operands are specified, they are used as regular
     expressions to match the command name or, if -f is specified, the full
     argument list of each process.  However, presently OpenBSD will only keep
     track of the first 16 characters of the command name for each process.
     Attempts to match any characters after the first 16 of a command name
     will silently fail.

     Note that a running pgrep or pkill process will never consider itself or
     system processes (kernel threads) as a potential match.


EXIT STATUS

     The pgrep and pkill utilities exit with one of the following values:

           0       One or more processes were matched.
           1       No processes were matched.
           2       Invalid options were specified on the command line.
           3       An internal error occurred.


SEE ALSO

     grep(1), kill(1), ps(1), kill(2), sigaction(2), re_format(7)


HISTORY

     pkill and pgrep first appeared in OpenBSD 3.5.  They are modelled after
     utilities of the same name that appeared in Sun Solaris 7.


AUTHORS

     Andrew Doran <ad@NetBSD.org>.

OpenBSD 5.4                      July 16, 2013                     OpenBSD 5.4

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