glibc/sysdeps/mach/hurd/setgid.c
Andreas Jaeger 41bdb6e20c Update to LGPL v2.1.
2001-07-06  Paul Eggert  <eggert@twinsun.com>

	* manual/argp.texi: Remove ignored LGPL copyright notice; it's
	not appropriate for documentation anyway.
	* manual/libc-texinfo.sh: "Library General Public License" ->
	"Lesser General Public License".

2001-07-06  Andreas Jaeger  <aj@suse.de>

	* All files under GPL/LGPL version 2: Place under LGPL version
	2.1.
2001-07-06 04:58:11 +00:00

97 lines
2.6 KiB
C

/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <hurd.h>
#include <hurd/id.h>
#include <string.h>
/* Set the group ID of the calling process to UID.
If the calling process is the super-user, the real
and effective group IDs, and the saved set-group-ID to UID;
if not, the effective group ID is set to GID. */
int
__setgid (gid)
gid_t gid;
{
auth_t newauth;
error_t err;
HURD_CRITICAL_BEGIN;
__mutex_lock (&_hurd_id.lock);
err = _hurd_check_ids ();
if (!err)
{
/* Make a new auth handle which has GID as the real gid,
and as the first element in the list of effective gids. */
gid_t *newgen, *newaux, auxbuf[2];
size_t ngen, naux;
if (_hurd_id.gen.ngids == 0)
{
/* No effective gids now. The new set will be just GID. */
newgen = &gid;
ngen = 1;
}
else
{
_hurd_id.gen.gids[0] = gid;
_hurd_id.valid = 0;
newgen = _hurd_id.gen.gids;
ngen = _hurd_id.gen.ngids;
}
newaux = _hurd_id.aux.gids;
naux = _hurd_id.aux.ngids;
if (_hurd_id.gen.nuids > 0 && _hurd_id.gen.uids[0] == 0)
{
/* We are root; set the real and saved IDs too. */
_hurd_id.valid = 0;
if (_hurd_id.aux.ngids < 2)
{
newaux = auxbuf;
naux = 2;
}
newaux[0] = newaux[1] = gid;
}
err = __USEPORT (AUTH, __auth_makeauth
(port, NULL, MACH_MSG_TYPE_COPY_SEND, 0,
_hurd_id.gen.uids, _hurd_id.gen.nuids,
_hurd_id.aux.uids, _hurd_id.aux.nuids,
newgen, ngen, newaux, naux,
&newauth));
}
__mutex_unlock (&_hurd_id.lock);
HURD_CRITICAL_END;
if (err)
return __hurd_fail (err);
/* Install the new handle and reauthenticate everything. */
err = __setauth (newauth);
__mach_port_deallocate (__mach_task_self (), newauth);
return err;
}
weak_alias (__setgid, setgid)