KILLPG
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
PROLOG
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.
NAME
killpg
--- send a signal to a process group
SYNOPSIS
#include <signal.h>
int killpg(pid_t pgrp, int sig);
DESCRIPTION
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.
RETURN VALUE
Refer to
kill().
ERRORS
Refer to
kill().
The following sections are informative.
EXAMPLES
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 */;"
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
getpgid(),
getpid(),
kill(),
raise()
The Base Definitions volume of POSIX.1-2017,
<signal.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
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.opengroup.org/unix/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
https://www.kernel.org/doc/man-pages/reporting_bugs.html .