mirror of https://github.com/mkerrisk/man-pages
79 lines
2.2 KiB
Groff
79 lines
2.2 KiB
Groff
.\" (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de)
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" License.
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.\" Modified Sat Jul 24 19:04:55 1993 by Rik Faith (faith@cs.unc.edu)
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.\" Modified 2004-11-11, Michael Kerrisk, <mtk-manpages@gmx.net>
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.\"
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.TH KILLPG 3 1993-04-04 "GNU" "Linux Programmer's Manual"
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.SH NAME
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killpg \- send signal to all members of a process group
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.SH SYNOPSIS
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.nf
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.B #include <signal.h>
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.sp
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.BI "int killpg(pid_t " pgrp ", int " signal );
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.fi
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.SH DESCRIPTION
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The
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.BR killpg ()
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function causes signal
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.I signal
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to be sent to all the processes in the process group
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.I pgrp
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or to the processes' own process group if
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.I pgrp
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is equal to zero.
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.PP
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If
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.I pgrp
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is greater than 1, it is equivalent to:
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.nf
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.sp
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.in +0.5i
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.B kill(\-pgrp , signal);
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.in -0.5i
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.fi
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.SH "RETURN VALUE"
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The value returned is \-1 on error, or 0 for success.
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.SH ERRORS
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Errors are returned in
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.I errno
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and can be one of the following:
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.TP
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.B EINVAL
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for an invalid signal,
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.TP
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.B EPERM
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if the userid of the calling process is not equal to that of the
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process the signal is sent to, and the userid is not that of the
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superuser.
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.TP
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.B ESRCH
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for a process group which does not exist, and
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.SH "CONFORMING TO"
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SUSv2, POSIX.1-2001
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.SH "SEE ALSO"
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.BR kill (2),
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.BR signal (2),
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.BR sigqueue (2),
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.BR signal (7)
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