Document behavior of killing process 0, matching the text in kill(2).

From Theo Buehler

diff --git a/bin/kill/kill.1 b/bin/kill/kill.1
index c0a505d..a356303 100644 (file)
--- a/bin/kill/kill.1
+++ b/bin/kill/kill.1
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: kill.1,v 1.37 2014/10/13 09:27:22 dlg Exp $
+.\"    $OpenBSD: kill.1,v 1.38 2015/01/16 21:31:27 millert Exp $
 .\"    $NetBSD: kill.1,v 1.8 1995/09/07 06:30:26 jtc Exp $
 .\"
 .\" Copyright (c) 1980, 1990, 1993
@@ -33,7 +33,7 @@
 .\"
 .\"    @(#)kill.1      8.2 (Berkeley) 4/28/95
 .\"
-.Dd $Mdocdate: October 13 2014 $
+.Dd $Mdocdate: January 16 2015 $
 .Dt KILL 1
 .Os
 .Sh NAME
@@ -99,6 +99,9 @@ The following PIDs have special meanings:
 .It \-1
 If superuser, broadcast the signal to all processes; otherwise, broadcast
 to all processes belonging to the user.
+.It 0
+Send the signal to all processes whose group ID is equal to the
+process group ID of the sender, and for which the process has permission.
 .It \- Ns Ar pgid
 Send the signal to all processes within the specified process group.
 .El