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0a62a9caa9
This allows specifying a %job (which is equivalent to the corresponding process group). Additionally, it improves reliability of kill from sh in high-load situations and ensures "kill" finds the correct utility regardless of PATH, as required by POSIX (unless the undocumented %builtin mechanism is used). Side effect: fatal errors (any error other than kill(2) failure) now return exit status 2 instead of 1. (This is consistent with other sh builtins, but not in NetBSD.) Code size increases about 1K on i386. Obtained from: NetBSD
157 lines
3.9 KiB
Groff
157 lines
3.9 KiB
Groff
.\"-
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.\" Copyright (c) 1980, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Institute of Electrical and Electronics Engineers, Inc.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)kill.1 8.2 (Berkeley) 4/28/95
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.\" $FreeBSD$
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.\"
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.Dd April 28, 1995
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.Dt KILL 1
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.Os
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.Sh NAME
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.Nm kill
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.Nd terminate or signal a process
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.Sh SYNOPSIS
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.Nm
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.Op Fl s Ar signal_name
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.Ar pid ...
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.Nm
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.Fl l
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.Op Ar exit_status
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.Nm
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.Fl Ar signal_name
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.Ar pid ...
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.Nm
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.Fl Ar signal_number
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.Ar pid ...
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.Sh DESCRIPTION
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The
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.Nm
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utility sends a signal to the processes specified by the
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.Ar pid
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operands.
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.Pp
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Only the super-user may send signals to other users' processes.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl s Ar signal_name
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A symbolic signal name specifying the signal to be sent instead of the
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default
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.Dv TERM .
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.It Fl l Op Ar exit_status
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If no operand is given, list the signal names; otherwise, write
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the signal name corresponding to
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.Ar exit_status .
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.It Fl Ar signal_name
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A symbolic signal name specifying the signal to be sent instead of the
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default
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.Dv TERM .
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.It Fl Ar signal_number
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A non-negative decimal integer, specifying the signal to be sent instead
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of the default
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.Dv TERM .
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.El
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.Pp
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The following PIDs have special meanings:
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.Bl -tag -width indent
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.It -1
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If superuser, broadcast the signal to all processes; otherwise broadcast
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to all processes belonging to the user.
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.El
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.Pp
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Some of the more commonly used signals:
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.Pp
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.Bl -tag -width indent -compact
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.It 1
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HUP (hang up)
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.It 2
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INT (interrupt)
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.It 3
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QUIT (quit)
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.It 6
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ABRT (abort)
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.It 9
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KILL (non-catchable, non-ignorable kill)
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.It 14
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ALRM (alarm clock)
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.It 15
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TERM (software termination signal)
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.El
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.Pp
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Some shells may provide a builtin
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.Nm
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command which is similar or identical to this utility.
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Consult the
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.Xr builtin 1
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manual page.
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.Sh EXIT STATUS
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.Ex -std
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.Sh EXAMPLES
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Terminate
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the processes with PIDs 142 and 157:
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.Pp
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.Dl "kill 142 157"
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.Pp
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Send the hangup signal
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.Pq Dv SIGHUP
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to the process with PID 507:
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.Pp
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.Dl "kill -s HUP 507"
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.Pp
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Terminate the process group with PGID 117:
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.Pp
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.Dl "kill -- -117"
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.Sh SEE ALSO
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.Xr builtin 1 ,
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.Xr csh 1 ,
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.Xr killall 1 ,
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.Xr ps 1 ,
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.Xr sh 1 ,
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.Xr kill 2 ,
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.Xr sigaction 2
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.Sh STANDARDS
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The
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.Nm
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utility is expected to be
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.St -p1003.2
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compatible.
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.Sh HISTORY
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A
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.Nm
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command appeared in
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.At v3 .
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.Sh BUGS
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A replacement for the command
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.Dq Li kill 0
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for
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.Xr csh 1
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users should be provided.
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