-.TH KILLPG 2 "27 July 1983"
+.\" Copyright (c) 1980 Regents of the University of California.
+.\" All rights reserved. The Berkeley software License Agreement
+.\" specifies the terms and conditions for redistribution.
+.\"
+.\" @(#)killpg.2 6.3 (Berkeley) 5/14/86
+.\"
+.TH KILLPG 2 "May 14, 1986"
.UC 4
.SH NAME
killpg \- send signal to a process group
for a list of signals.
.PP
The sending process and members of the process group must
-have the same effective user ID, otherwise
-this call is restricted to the super-user.
+have the same effective user ID, or
+the sender must be the super-user.
As a single special case the continue signal SIGCONT may be sent
-to any process which is a descendant of the current process.
+to any process that is a descendant of the current process.
.SH "RETURN VALUE
Upon successful completion, a value of 0 is returned. Otherwise,
a value of \-1 is returned and the global variable \fIerrno\fP
\fISig\fP is not a valid signal number.
.TP 15
[ESRCH]
-No process can be found corresponding to that specified by \fIpid\fP.
+No process can be found in the process group specified by \fIpgrp\fP.
+.TP 15
+[ESRCH]
+The process group was given as 0
+but the sending process does not have a process group.
.TP 15
[EPERM]
The sending process is not the super-user and one or more