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killpg.html
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<!-- Creator : groff version 1.22.4 -->
<!-- CreationDate: Wed Jan 29 11:26:27 2020 -->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta name="generator" content="groff -Thtml, see www.gnu.org">
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<meta name="Content-Style" content="text/css">
<style type="text/css">
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table { margin-top: 0; margin-bottom: 0; vertical-align: top }
h1 { text-align: center }
</style>
<title>KILLPG</title>
</head>
<body>
<h1 align="center">KILLPG</h1>
<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#RETURN VALUE">RETURN VALUE</a><br>
<a href="#ERRORS">ERRORS</a><br>
<a href="#CONFORMING TO">CONFORMING TO</a><br>
<a href="#NOTES">NOTES</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<a href="#COLOPHON">COLOPHON</a><br>
<hr>
<h2>NAME
<a name="NAME"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">killpg - send
signal to a process group</p>
<h2>SYNOPSIS
<a name="SYNOPSIS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>#include
<signal.h></b></p>
<p style="margin-left:11%; margin-top: 1em"><b>int
killpg(int</b> <i>pgrp</i><b>, int</b>
<i>sig</i><b>);</b></p>
<p style="margin-left:5%; margin-top: 1em">Feature Test
Macro Requirements for glibc (see
<b>feature_test_macros</b>(7)):</p>
<p style="margin-left:11%;"><b>killpg</b>():</p>
<p style="margin-left:17%;">_XOPEN_SOURCE >= 500
<br>
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE <br>
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE</p>
<h2>DESCRIPTION
<a name="DESCRIPTION"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>killpg</b>()
sends the signal <i>sig</i> to the process group
<i>pgrp</i>. See <b>signal</b>(7) for a list of signals.</p>
<p style="margin-left:11%; margin-top: 1em">If <i>pgrp</i>
is 0, <b>killpg</b>() sends the signal to the calling
process’s process group. (POSIX says: if <i>pgrp</i>
is less than or equal to 1, the behavior is undefined.)</p>
<p style="margin-left:11%; margin-top: 1em">For the
permissions required to send a signal to another process,
see <b>kill</b>(2).</p>
<h2>RETURN VALUE
<a name="RETURN VALUE"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">On success,
zero is returned. On error, -1 is returned, and <i>errno</i>
is set appropriately.</p>
<h2>ERRORS
<a name="ERRORS"></a>
</h2>
<table width="100%" border="0" rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="11%"></td>
<td width="9%">
<p style="margin-top: 1em"><b>EINVAL</b></p></td>
<td width="2%"></td>
<td width="78%">
<p style="margin-top: 1em"><i>sig</i> is not a valid signal
number.</p> </td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="9%">
<p><b>EPERM</b></p></td>
<td width="2%"></td>
<td width="78%">
<p>The process does not have permission to send the signal
to any of the target processes. For the required
permissions, see <b>kill</b>(2).</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="9%">
<p><b>ESRCH</b></p></td>
<td width="2%"></td>
<td width="78%">
<p>No process can be found in the process group specified
by <i>pgrp</i>.</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="9%">
<p><b>ESRCH</b></p></td>
<td width="2%"></td>
<td width="78%">
<p>The process group was given as 0 but the sending process
does not have a process group.</p></td></tr>
</table>
<h2>CONFORMING TO
<a name="CONFORMING TO"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">POSIX.1-2001,
POSIX.1-2008, SVr4, 4.4BSD (<b>killpg</b>() first appeared
in 4BSD).</p>
<h2>NOTES
<a name="NOTES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">There are
various differences between the permission checking in
BSD-type systems and System V-type systems. See the
POSIX rationale for <b>kill</b>(). A difference not
mentioned by POSIX concerns the return value <b>EPERM</b>:
BSD documents that no signal is sent and <b>EPERM</b>
returned when the permission check failed for at least one
target process, while POSIX documents <b>EPERM</b> only when
the permission check failed for all target processes.</p>
<p style="margin-left:11%; margin-top: 1em"><b>C
library/kernel differences</b> <br>
On Linux, <b>killpg</b>() is implemented as a library
function that makes the call
<i>kill(-pgrp, sig)</i>.</p>
<h2>SEE ALSO
<a name="SEE ALSO"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>getpgrp</b>(2),
<b>kill</b>(2), <b>signal</b>(2), <b>capabilities</b>(7),
<b>credentials</b>(7)</p>
<h2>COLOPHON
<a name="COLOPHON"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">This page is
part of release 5.02 of the Linux <i>man-pages</i> project.
A description of the project, information about reporting
bugs, and the latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.</p>
<hr>
</body>
</html>