FreeBSD/Linux Kernel Cross Reference
sys/sys/ucred.h
1 /* $NetBSD: ucred.h,v 1.21 2005/02/26 22:25:34 perry Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)ucred.h 8.4 (Berkeley) 1/9/95
32 */
33
34 #ifndef _SYS_UCRED_H_
35 #define _SYS_UCRED_H_
36
37 #include <sys/lock.h>
38
39 /*
40 * Credentials.
41 */
42
43 /* Userland's view of credentials. This should not change */
44 struct uucred {
45 u_short cr_unused; /* not used, compat */
46 uid_t cr_uid; /* effective user id */
47 gid_t cr_gid; /* effective group id */
48 short cr_ngroups; /* number of groups */
49 gid_t cr_groups[NGROUPS]; /* groups */
50 };
51
52 struct ucred {
53 struct simplelock cr_lock; /* mutex for ref count */
54 u_int32_t cr_ref; /* reference count */
55 #define cr_startcopy cr_uid /* for dup & copy */
56 uid_t cr_uid; /* effective user id */
57 gid_t cr_gid; /* effective group id */
58 u_int32_t cr_ngroups; /* number of groups */
59 gid_t cr_groups[NGROUPS]; /* groups */
60 };
61
62 #define NOCRED ((struct ucred *)-1) /* no credential available */
63 #define FSCRED ((struct ucred *)-2) /* filesystem credential */
64
65 #ifdef _KERNEL
66 static __inline__ void crhold(struct ucred *cr)
67 {
68 simple_lock(&cr->cr_lock);
69 cr->cr_ref++;
70 simple_unlock(&cr->cr_lock);
71 }
72
73 /* flags that control when do_setres{u,g}id will do anything */
74 #define ID_E_EQ_E 0x001 /* effective equals effective */
75 #define ID_E_EQ_R 0x002 /* effective equals real */
76 #define ID_E_EQ_S 0x004 /* effective equals saved */
77 #define ID_R_EQ_E 0x010 /* real equals effective */
78 #define ID_R_EQ_R 0x020 /* real equals real */
79 #define ID_R_EQ_S 0x040 /* real equals saved */
80 #define ID_S_EQ_E 0x100 /* saved equals effective */
81 #define ID_S_EQ_R 0x200 /* saved equals real */
82 #define ID_S_EQ_S 0x400 /* saved equals saved */
83
84 int do_setresuid(struct lwp *, uid_t, uid_t, uid_t, u_int);
85 int do_setresgid(struct lwp *, gid_t, gid_t, gid_t, u_int);
86
87 struct ucred *crcopy(struct ucred *);
88 struct ucred *crdup(const struct ucred *);
89 void crfree(struct ucred *);
90 struct ucred *crget(void);
91 int suser(const struct ucred *, u_short *);
92 void crcvt(struct ucred *, const struct uucred *);
93 int crcmp(const struct ucred *, const struct uucred *);
94 #endif /* _KERNEL */
95
96 #endif /* !_SYS_UCRED_H_ */
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