104 lines
3.7 KiB
Groff
104 lines
3.7 KiB
Groff
|
.\" $OpenBSD: setregid.2,v 1.11 2015/02/05 02:33:09 schwarze Exp $
|
||
|
.\"
|
||
|
.\" Copyright (c) 1980, 1991, 1993, 1994
|
||
|
.\" 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.
|
||
|
.\"
|
||
|
.\" @(#)setregid.2 8.2 (Berkeley) 4/16/94
|
||
|
.\"
|
||
|
.Dd $Mdocdate: February 5 2015 $
|
||
|
.Dt SETREGID 2
|
||
|
.Os
|
||
|
.Sh NAME
|
||
|
.Nm setregid
|
||
|
.Nd set real and effective group IDs
|
||
|
.Sh SYNOPSIS
|
||
|
.In unistd.h
|
||
|
.Ft int
|
||
|
.Fn setregid "gid_t rgid" "gid_t egid"
|
||
|
.Sh DESCRIPTION
|
||
|
The real and effective group IDs of the current process
|
||
|
are set according to the arguments.
|
||
|
The saved group ID will be set to the new value of the real group
|
||
|
ID if a real group ID is specified and either
|
||
|
the new real group ID value is different from the current value
|
||
|
or the new value of the effective group ID differs from the
|
||
|
current saved group ID.
|
||
|
.Pp
|
||
|
Unprivileged users may change either group ID to the current value
|
||
|
of the real, effective, or saved group ID.
|
||
|
Only the superuser may make other changes.
|
||
|
.Pp
|
||
|
Supplying a value of -1 for either the real or effective
|
||
|
group ID forces the system to substitute the current
|
||
|
ID in place of the -1 parameter.
|
||
|
.Pp
|
||
|
The
|
||
|
.Fn setregid
|
||
|
function was intended to allow swapping the real and
|
||
|
effective group IDs in set-group-ID programs to temporarily relinquish
|
||
|
the set-group-ID value.
|
||
|
This purpose is now better served by the use of the
|
||
|
.Xr setegid 2
|
||
|
function.
|
||
|
.Pp
|
||
|
When setting the real and effective group IDs to the same value, the
|
||
|
.Xr setgid 2
|
||
|
function is preferred.
|
||
|
.Sh RETURN VALUES
|
||
|
.Rv -std
|
||
|
.Sh ERRORS
|
||
|
.Bl -tag -width Er
|
||
|
.It Bq Er EPERM
|
||
|
The current process is not the superuser and a change
|
||
|
other than changing the effective group ID to the real group ID
|
||
|
was specified.
|
||
|
.El
|
||
|
.Sh SEE ALSO
|
||
|
.Xr getgid 2 ,
|
||
|
.Xr setegid 2 ,
|
||
|
.Xr setgid 2 ,
|
||
|
.Xr setresgid 2 ,
|
||
|
.Xr setreuid 2
|
||
|
.Sh STANDARDS
|
||
|
The
|
||
|
.Fn setregid
|
||
|
function conforms to the
|
||
|
.St -p1003.1-2008
|
||
|
specification, except that the conditions for changing the saved
|
||
|
group ID differ and that, if it is changed, the saved group ID
|
||
|
is set to the real group ID instead of the effective group ID.
|
||
|
.Sh HISTORY
|
||
|
The
|
||
|
.Fn setregid
|
||
|
system call first appeared in
|
||
|
.Bx 4.1c ,
|
||
|
predating POSIX.
|
||
|
A semantically different version appeared in
|
||
|
.Bx 4.4 .
|
||
|
The current version, with the original semantics restored, appeared in
|
||
|
.Ox 3.3 .
|