.\" 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 6.1 (Berkeley) %G%
killpg \- send signal to a process group
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.
As a single special case the continue signal SIGCONT may be sent
to any process which is a descendant of the current process.
Upon successful completion, a value of 0 is returned. Otherwise,
a value of \-1 is returned and the global variable \fIerrno\fP
is set to indicate the error.
\fIKillpg\fP will fail and no signal will be sent if any of the
\fISig\fP is not a valid signal number.
No process can be found corresponding to that specified by \fIpid\fP.
The sending process is not the super-user and one or more
of the target processes has an effective user ID different from that
kill(2), getpgrp(2), sigvec(2)