glibc/sysdeps/mach/hurd/setregid.c
Roland McGrath 975320984b Fri Dec 22 00:57:38 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/mach/hurd/setuid.c: Rewrote ID frobnication to do the
	right thing.
	* sysdeps/mach/hurd/setgid.c: Likewise.
	* sysdeps/mach/hurd/setreuid.c: Likewise.
	* sysdeps/mach/hurd/setregid.c: Likewise.
	* sysdeps/mach/hurd/setegid.c: Likewise.
	* sysdeps/mach/hurd/seteuid.c: Likewise.

	* sysdeps/mach/hurd/fork.c: Peek __mach_task_self_ value before
	proc_dostop call to work around kernel paging bug.

Thu Dec 21 12:19:32 1995  Miles Bader  <miles@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/setuid.c (__setuid): Actually add the new uid
 	instead of putting it (and other uids) in the gids and leaving the
 	old uids as is.
1995-12-22 10:00:21 +00:00

98 lines
2.4 KiB
C

/* Copyright (C) 1993, 1994, 1995 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/id.h>
#include <string.h>
int
__setregid (gid_t rgid, gid_t egid)
{
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 RGID as the real gid,
and EGID as the first element in the list of effective gids. */
gid_t *newgen, *newaux;
size_t ngen, naux;
newgen = _hurd_id.gen.gids;
ngen = _hurd_id.gen.ngids;
if (egid != -1)
{
if (_hurd_id.gen.ngids == 0)
{
/* No effective gids now. The new set will be just GID. */
newgen = &egid;
ngen = 1;
}
else
{
_hurd_id.gen.gids[0] = egid;
_hurd_id.valid = 0;
}
}
newaux = _hurd_id.aux.gids;
naux = _hurd_id.aux.ngids;
if (rgid != -1)
{
if (_hurd_id.aux.ngids == 0)
{
newaux = &rgid;
naux = 1;
}
else
{
_hurd_id.aux.gids[0] = rgid;
_hurd_id.valid = 0;
}
}
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 (__setregid, setregid)