1.\" $NetBSD: kill.1,v 1.21 2007/12/28 14:32:50 wiz Exp $ 2.\" 3.\" Copyright (c) 1980, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the Institute of Electrical and Electronics Engineers, Inc. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. Neither the name of the University nor the names of its contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" @(#)kill.1 8.2 (Berkeley) 4/28/95 34.\" 35.Dd April 28, 1995 36.Dt KILL 1 37.Os 38.Sh NAME 39.Nm kill 40.Nd terminate or signal a process 41.Sh SYNOPSIS 42.Nm 43.Op Fl s Ar signal_name 44.Ar pid 45\&... 46.Nm 47.Fl l 48.Op Ar exit_status 49.Nm 50.Fl signal_name 51.Ar pid 52\&... 53.Nm 54.Fl signal_number 55.Ar pid 56\&... 57.Sh DESCRIPTION 58The 59.Nm 60utility sends a signal to the process(es) specified 61by the pid operand(s). 62.Pp 63Only the super-user may send signals to other users' processes. 64.Pp 65The options are as follows: 66.Pp 67.Bl -tag -width Ds 68.It Fl s Ar signal_name 69A symbolic signal name specifying the signal to be sent instead of the 70default 71.Dv TERM . 72.It Fl l Op Ar exit_status 73Display the name of the signal corresponding to 74.Ar exit_status . 75.Ar exit_status 76may be the exit status of a command killed by a signal 77(see the 78special 79.Xr sh 1 80parameter 81.Sq ?\& ) 82or a signal number. 83.Pp 84If no operand is given, display the names of all the signals. 85.It Fl signal_name 86A symbolic signal name specifying the signal to be sent instead of the 87default 88.Dv TERM . 89.It Fl signal_number 90A non-negative decimal integer, specifying the signal to be sent instead 91of the default 92.Dv TERM . 93.El 94.Pp 95The following pids have special meanings: 96.Bl -tag -width Ds -compact 97.It -1 98If superuser, broadcast the signal to all processes; otherwise broadcast 99to all processes belonging to the user. 100.It 0 101Broadcast the signal to all processes in the current process group 102belonging to the user. 103.El 104.Pp 105Some of the more commonly used signals: 106.Bl -tag -width Ds -compact 107.It 1 108HUP (hang up) 109.It 2 110INT (interrupt) 111.It 3 112QUIT (quit) 113.It 6 114ABRT (abort) 115.It 9 116KILL (non-catchable, non-ignorable kill) 117.It 14 118ALRM (alarm clock) 119.It 15 120TERM (software termination signal) 121.El 122.Pp 123.Nm 124is a built-in to 125.Xr csh 1 ; 126it allows job specifiers of the form ``%...'' as arguments 127so process id's are not as often used as 128.Nm 129arguments. 130See 131.Xr csh 1 132for details. 133.Sh SEE ALSO 134.Xr csh 1 , 135.Xr pgrep 1 , 136.Xr pkill 1 , 137.Xr ps 1 , 138.Xr kill 2 , 139.Xr sigaction 2 , 140.Xr signal 7 141.Sh STANDARDS 142The 143.Nm 144function is expected to be 145.St -p1003.2 146compatible. 147.Sh HISTORY 148A 149.Nm 150command appeared in 151.At v6 . 152