cleanups. return when printing NULL commands

[unix-history] / usr / src / bin / kill / kill.1

diff --git a/usr/src/bin/kill/kill.1 b/usr/src/bin/kill/kill.1
index 908a12d..b5e2734 100644 (file)
--- a/usr/src/bin/kill/kill.1
+++ b/usr/src/bin/kill/kill.1
@@ -1,70 +1,94 @@
-.\" Copyright (c) 1980 Regents of the University of California.
-.\" All rights reserved.  The Berkeley software License Agreement
-.\" specifies the terms and conditions for redistribution.
+.\" Copyright (c) 1980, 1990 The Regents of the University of California.
+.\" All rights reserved.

 .\"
 .\"

-.\"    @(#)kill.1      6.2 (Berkeley) %G%
+.\" This code is derived from software contributed to Berkeley by
+.\" the Institute of Electrical and Electronics Engineers, Inc.

 .\"
 .\"

-.TH KILL 1 ""
-.UC 4
-.SH NAME
-kill \- terminate a process with extreme prejudice
-.SH SYNOPSIS
-.B kill
-[
-.BR \- sig
-]
-processid ...
-.br
-.B kill
-.B \-l
-.SH DESCRIPTION
-.I Kill
-sends the TERM (terminate, 15) signal to the specified processes.
-If a signal name or number preceded by `\-' is given
-as first argument, that signal is sent instead of
-terminate
-(see
-.IR  sigvec (2)).
-The signal names are listed by
-`kill \-l', and are as given in
-.I /usr/include/signal.h,
-stripped of the common SIG prefix.
-.PP
-The terminate signal will kill processes that do not catch the signal;
-`kill \-9 ...' is a sure kill, as the KILL (9) signal cannot be caught.
-By convention, if process number 0 is specified, all members
-in the process group (i.e. processes resulting from 
-the current login) are signaled (but beware: this works only
-if you use
-.IR sh (1);
-not if you use
-.IR csh (1).)
-Negative process numbers also have special meanings; see
-.IR kill (2)
-for details.
-.PP
-The killed processes must belong
-to the current user unless
-he is the super-user.
-.PP
-The process number of an asynchronous process
-started with `&' is reported by the shell.
-Process numbers can also be found by using
-.IR ps (1).
-.I Kill
+.\" %sccs.include.redist.roff%
+.\"
+.\"    @(#)kill.1      6.9 (Berkeley) %G%
+.\"
+.Dd 
+.Dt KILL 1
+.Os
+.Sh NAME
+.Nm kill
+.Nd terminate or signal a process
+.Sh SYNOPSIS
+.Nm kill
+.Op Fl signal_name
+.Ar pid
+\&...
+.Nm kill
+.Op Fl signal_number
+.Ar pid
+\&...
+.Nm kill
+.Op Fl l
+.Sh DESCRIPTION
+The kill utility sends the
+.Dv TERM
+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 l
+List the signal names.
+.It Fl signal_name
+A symbolic signal name specifying the signal to be sent instead of the
+default
+.Dv TERM .
+The
+.Fl l
+option displays the signal names.
+.It Fl signal_number
+A non-negative decimal integer, specifying the signal to be sent instead
+of the default
+.Dv TERM .
+.El
+.Pp
+Some of the more commonly used signals:
+.Bd -ragged -offset indent -compact
+.Bl -column XXX TERM
+.It -1 -1      (super-user broadcast to all processes, or user broadcast
+to user's processes)
+.It 0  0       (sh(1) only, signals all members of process group)
+.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
+.Ed
+.Pp
+.Nm Kill

 is a built-in to
 is a built-in to

-.IR csh (1);
+.Xr csh  1  ;

 it allows job specifiers of the form ``%...'' as arguments
 so process id's are not as often used as
 it allows job specifiers of the form ``%...'' as arguments
 so process id's are not as often used as

-.I kill
+.Nm kill

 arguments.
 See
 arguments.
 See

-.IR csh (1)
+.Xr csh  1

 for details.
 for details.

-.SH "SEE ALSO"
-csh(1), ps(1), kill(2), sigvec(2)
-.SH BUGS
-A replacement for ``kill 0''
+.Sh SEE ALSO
+.Xr csh 1 ,
+.Xr ps 1 ,
+.Xr kill 2 ,
+.Xr sigvec 2
+.Sh HISTORY
+A
+.Nm kill
+command appeared in
+.At v6 .
+.Sh BUGS
+A replacement for the command
+.Dq Li kill 0

 for
 for

-.IR csh (1)
+.Xr csh  1

 users should be provided.
 users should be provided.