mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 03:20:05 +00:00
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
|
/* setresuid -- set effective user ID, real user ID, and saved-set user ID
|
||
|
Copyright (C) 2002 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 <hurd.h>
|
||
|
#include <hurd/id.h>
|
||
|
|
||
|
/* Set the effective user ID, real user ID, and saved-set user ID,
|
||
|
of the calling process to EUID, RUID, and SUID, respectively. */
|
||
|
int
|
||
|
__setresuid (uid_t euid, uid_t ruid, uid_t suid)
|
||
|
{
|
||
|
auth_t newauth;
|
||
|
error_t err;
|
||
|
uid_t auids[2] = { ruid, suid };
|
||
|
|
||
|
HURD_CRITICAL_BEGIN;
|
||
|
__mutex_lock (&_hurd_id.lock);
|
||
|
err = _hurd_check_ids ();
|
||
|
|
||
|
if (!err)
|
||
|
{
|
||
|
/* Make a new auth handle which has EUID as the first element in the
|
||
|
list of effective uids. */
|
||
|
|
||
|
if (_hurd_id.gen.nuids > 0)
|
||
|
{
|
||
|
_hurd_id.gen.uids[0] = euid;
|
||
|
_hurd_id.valid = 0;
|
||
|
}
|
||
|
if (_hurd_id.aux.nuids > 1)
|
||
|
{
|
||
|
_hurd_id.aux.uids[0] = ruid;
|
||
|
_hurd_id.aux.uids[1] = suid;
|
||
|
_hurd_id.valid = 0;
|
||
|
}
|
||
|
|
||
|
err = __USEPORT (AUTH, __auth_makeauth
|
||
|
(port, NULL, MACH_MSG_TYPE_COPY_SEND, 0,
|
||
|
_hurd_id.gen.nuids ? _hurd_id.gen.uids : &euid,
|
||
|
_hurd_id.gen.nuids ?: 1,
|
||
|
_hurd_id.aux.nuids > 1 ? _hurd_id.aux.uids : auids,
|
||
|
_hurd_id.aux.nuids > 1 ? _hurd_id.aux.nuids : 2,
|
||
|
_hurd_id.gen.gids, _hurd_id.gen.ngids,
|
||
|
_hurd_id.aux.gids, _hurd_id.aux.ngids,
|
||
|
&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;
|
||
|
}
|
||
|
libc_hidden_def (__setresuid)
|