FreeBSD/Linux Kernel Cross Reference
sys/sys/ucred.h
1 /*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)ucred.h 8.4 (Berkeley) 1/9/95
34 * $FreeBSD$
35 */
36
37 #ifndef _SYS_UCRED_H_
38 #define _SYS_UCRED_H_
39
40 /*
41 * Credentials.
42 */
43 struct ucred {
44 u_short cr_ref; /* reference count */
45 uid_t cr_uid; /* effective user id */
46 short cr_ngroups; /* number of groups */
47 gid_t cr_groups[NGROUPS]; /* groups */
48 };
49 #define cr_gid cr_groups[0]
50 #define NOCRED ((struct ucred *)0) /* no credential available */
51 #define FSCRED ((struct ucred *)-1) /* filesystem credential */
52
53 #ifdef KERNEL
54 #define crhold(cr) (cr)->cr_ref++
55
56 struct ucred *crcopy __P((struct ucred *cr));
57 struct ucred *crdup __P((struct ucred *cr));
58 void crfree __P((struct ucred *cr));
59 struct ucred *crget __P((void));
60 int suser __P((struct ucred *cred, u_short *acflag));
61 int groupmember __P((gid_t gid, struct ucred *cred));
62 #endif /* KERNEL */
63
64 #endif /* !_SYS_UCRED_H_ */
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