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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
* Copyright 2001-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.78 */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/cred_impl.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/debug.h>
#include <sys/kmem.h>
#include <sys/policy.h>
int
setgroups(int gidsetsize, gid_t *gidset)
{
proc_t *p;
cred_t *cr, *newcr;
int i;
int n = gidsetsize;
gid_t *groups = NULL;
int error;
/* Perform the cheapest tests before grabbing p_crlock */
if (n > ngroups_max || n < 0)
return (set_errno(EINVAL));
if (n != 0) {
groups = kmem_alloc(n * sizeof (gid_t), KM_SLEEP);
if (copyin(gidset, groups, n * sizeof (gid_t)) != 0) {
kmem_free(groups, n * sizeof (gid_t));
return (set_errno(EFAULT));
}
for (i = 0; i < n; i++) {
if (groups[i] < 0 || groups[i] > MAXUID) {
kmem_free(groups, n * sizeof (gid_t));
return (set_errno(EINVAL));
}
}
}
/*
* Need to pre-allocate the new cred structure before acquiring
* the p_crlock mutex.
*/
newcr = cralloc();
p = ttoproc(curthread);
mutex_enter(&p->p_crlock);
cr = p->p_cred;
if ((error = secpolicy_allow_setid(cr, -1, B_FALSE)) != 0) {
mutex_exit(&p->p_crlock);
if (groups != NULL)
kmem_free(groups, n * sizeof (gid_t));
crfree(newcr);
return (set_errno(error));
}
crdup_to(cr, newcr);
if (n != 0) {
bcopy(groups, newcr->cr_groups, n * sizeof (gid_t));
kmem_free(groups, n * sizeof (gid_t));
}
newcr->cr_ngroups = n;
p->p_cred = newcr;
crhold(newcr); /* hold for the current thread */
crfree(cr); /* free the old one */
mutex_exit(&p->p_crlock);
/*
* Broadcast new cred to process threads (including the current one).
*/
crset(p, newcr);
return (0);
}
int
getgroups(int gidsetsize, gid_t *gidset)
{
struct cred *cr;
int n;
cr = curthread->t_cred;
n = (int)cr->cr_ngroups;
if (gidsetsize != 0) {
if (gidsetsize < n)
return (set_errno(EINVAL));
if (copyout(cr->cr_groups, gidset, n * sizeof (gid_t)))
return (set_errno(EFAULT));
}
return (n);
}
|
