This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior), or
the interface may not be implemented on Linux.
The killpg() function shall send the signal specified by sig to the
process group specified by pgrp.
If pgrp is greater than 1, killpg(pgrp, sig) shall be equivalent to
kill(−pgrp, sig). If pgrp is less than or equal to 1, the behavior of
killpg() is undefined.
Sending a Signal to All Other Members of a Process Group
The following example shows how the calling process could send a
signal to all other members of its process group. To prevent itself
from receiving the signal it first makes itself immune to the signal
by ignoring it.
#include <signal.h>#include <unistd.h>...if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)/* Handle error */;
if (killpg(getpgrp(), SIGUSR1) == −1)
/* Handle error */;"
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) In the event of any discrepancy between this version and
the original IEEE and The Open Group Standard, the original IEEE and
The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
IEEE/The Open Group 2013 KILLPG(3P)