.\" Copyright (c) 1980, 1990, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the Institute of Electrical and Electronics Engineers, Inc.
.\"
.\" %sccs.include.redist.roff%
.\"
.\"	@(#)kill.1	8.2 (Berkeley) 04/28/95
.\"
.Dd 
.Dt KILL 1
.Os
.Sh NAME
.Nm kill
.Nd terminate or signal a process
.Sh SYNOPSIS
.Nm kill
.Op Fl s Ar signal_name
.Ar pid
\&...
.Nm kill
.Fl l
.Op Ar exit_status
.Nm kill
.Fl signal_name
.Ar pid
\&...
.Nm kill
.Fl signal_number
.Ar pid
\&...
.Sh DESCRIPTION
The kill utility sends a signal to the processes specified
by the pid operand(s).
.Pp
Only the super-user may send signals to other users' processes.
.Pp
The options are as follows:
.Pp
.Bl -tag -width Ds
.It Fl s Ar signal_name
A symbolic signal name specifying the signal to be sent instead of the
default
.Dv TERM .
.It Fl l Op Ar exit_status
If no operand is given, list the signal names; otherwise, write
the signal name corresponding to
.Ar exit_status .
.It Fl signal_name
A symbolic signal name specifying the signal to be sent instead of the
default
.Dv TERM .
.It Fl signal_number
A non-negative decimal integer, specifying the signal to be sent instead
of the default
.Dv TERM .
.El
.Pp
The following pids have special meanings:
.Bl -tag -width Ds -compact
.It -1
If superuser, broadcast the signal to all processes; otherwise broadcast
to all processes belonging to the user.
.El
.Pp
Some of the more commonly used signals:
.Bl -tag -width Ds -compact
.It 1
HUP (hang up)
.It 2
INT (interrupt)
.It 3
QUIT (quit)
.It 6
ABRT (abort)
.It 9
KILL (non-catchable, non-ignorable kill)
.It 14
ALRM (alarm clock)
.It 15
TERM (software termination signal)
.El
.Pp
.Nm Kill
is a built-in to
.Xr csh  1  ;
it allows job specifiers of the form ``%...'' as arguments
so process id's are not as often used as
.Nm kill
arguments.
See
.Xr csh  1
for details.
.Sh SEE ALSO
.Xr csh 1 ,
.Xr ps 1 ,
.Xr kill 2 ,
.Xr sigvec 2
.Sh STANDARDS
The
.Nm kill
function is expected to be
.St -p1003.2
compatible.
.Sh HISTORY
A
.Nm kill
command appeared in
.At v6 .
.Sh BUGS
A replacement for the command
.Dq Li kill 0
for
.Xr csh  1
users should be provided.