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-.\" Copyright (c) 1983, 1991, 1993
-.\" The Regents of the University of California. All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" @(#)getgid.2 8.1 (Berkeley) 6/4/93
-.\" $FreeBSD$
-.\"
-.Dd May 1, 2020
-.Dt GETGID 2
-.Os
-.Sh NAME
-.Nm getgid ,
-.Nm getegid
-.Nd get group process identification
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In unistd.h
-.Ft gid_t
-.Fn getgid void
-.Ft gid_t
-.Fn getegid void
-.Sh DESCRIPTION
-The
-.Fn getgid
-system call returns the real group ID of the calling process,
-.Fn getegid
-returns the effective group ID of the calling process.
-.Pp
-The real group ID is specified at login time.
-.Pp
-The real group ID is the group of the user who invoked the program.
-As the effective group ID gives the process additional permissions
-during the execution of
-.Dq Em set-group-ID
-mode processes,
-.Fn getgid
-is used to determine the real-user-id of the calling process.
-.Sh ERRORS
-The
-.Fn getgid
-and
-.Fn getegid
-system calls are always successful, and no return value is reserved to
-indicate an error.
-.Sh SEE ALSO
-.Xr getuid 2 ,
-.Xr issetugid 2 ,
-.Xr setgid 2 ,
-.Xr setregid 2
-.Sh STANDARDS
-The
-.Fn getgid
-and
-.Fn getegid
-system calls are expected to conform to
-.St -p1003.1-90 .
-.Sh HISTORY
-The
-.Fn getgid
-function appeared in
-.At v4 .