+++ /dev/null
-.\" Copyright (C), 1994, Graeme W. Wilford. (Wilf.)
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.\" Fri Jul 29th 12:56:44 BST 1994 Wilf. <G.Wilford@ee.surrey.ac.uk>
-.\" Modified 1997-01-31 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified 2002-03-09 by aeb
-.\"
-.TH SETGID 2 2014-09-21 "Linux" "Linux Programmer's Manual"
-.SH NAME
-setgid \- set group identity
-.SH SYNOPSIS
-.B #include <sys/types.h>
-.br
-.B #include <unistd.h>
-.sp
-.BI "int setgid(gid_t " gid );
-.SH DESCRIPTION
-.BR setgid ()
-sets the effective group ID of the calling process.
-If the caller is the
-superuser, the real GID and saved set-group-ID are also set.
-
-Under Linux,
-.BR setgid ()
-is implemented like the POSIX version with the
-.B _POSIX_SAVED_IDS
-feature.
-This allows a set-group-ID program that is not set-user-ID-root
-to drop all of its group
-privileges, do some un-privileged work, and then reengage the original
-effective group ID in a secure manner.
-.SH RETURN VALUE
-On success, zero is returned.
-On error, \-1 is returned, and
-.I errno
-is set appropriately.
-.SH ERRORS
-.TP
-.B EINVAL
-The group ID specified in
-.I gid
-is not valid in this user namespace.
-.TP
-.B EPERM
-The calling process is not privileged (does not have the
-\fBCAP_SETGID\fP capability), and
-.I gid
-does not match the real group ID or saved set-group-ID of
-the calling process.
-.SH CONFORMING TO
-SVr4, POSIX.1-2001.
-.SH NOTES
-The original Linux
-.BR setgid ()
-system call supported only 16-bit group IDs.
-Subsequently, Linux 2.4 added
-.BR setgid32 ()
-supporting 32-bit IDs.
-The glibc
-.BR setgid ()
-wrapper function transparently deals with the variation across kernel versions.
-.SH SEE ALSO
-.BR getgid (2),
-.BR setegid (2),
-.BR setregid (2),
-.BR capabilities (7),
-.BR credentials (7),
-.BR user_namespaces (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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