1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/* Copyright (C) 1993, 1994, 1995, 1997 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 <sys/types.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/id.h>
#include <string.h>
int
__setregid (rgid, egid)
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)
|
