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: src/sys/sys/ucred.h,v 1.14.2.5 2002/03/09 05:20:25 dd Exp $ 35 * $DragonFly: src/sys/sys/ucred.h,v 1.6 2003/08/20 07:31:22 rob Exp $ 36 */ 37 38 #ifndef _SYS_UCRED_H_ 39 #define _SYS_UCRED_H_ 40 41 struct prison; 42 43 /* 44 * Credentials. 45 * 46 * Please do not inspect cr_uid directly to determine superuserness. 47 * Only the suser()/suser_cred() function should be used for this. 48 */ 49 struct ucred { 50 u_int cr_ref; /* reference count */ 51 uid_t cr_uid; /* effective user id */ 52 short cr_ngroups; /* number of groups */ 53 gid_t cr_groups[NGROUPS]; /* groups */ 54 struct uidinfo *cr_uidinfo; /* per uid resource consumption */ 55 struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */ 56 struct prison *cr_prison; /* prison info */ 57 uid_t cr_ruid; /* Real user id. */ 58 uid_t cr_svuid; /* Saved effective user id. */ 59 gid_t cr_rgid; /* Real group id. */ 60 gid_t cr_svgid; /* Saved effective group id. */ 61 int cr_refcnt; /* Number of references. */ 62 }; 63 #define cr_gid cr_groups[0] 64 #define NOCRED ((struct ucred *)0) /* no credential available */ 65 #define FSCRED ((struct ucred *)-1) /* filesystem credential */ 66 67 /* 68 * This is the external representation of struct ucred, based upon the 69 * size of a 4.2-RELEASE struct ucred. There will probably never be 70 * any need to change the size of this or layout of its used fields. 71 */ 72 struct xucred { 73 u_int cr_version; /* structure layout version */ 74 uid_t cr_uid; /* effective user id */ 75 short cr_ngroups; /* number of groups */ 76 gid_t cr_groups[NGROUPS]; /* groups */ 77 void *_cr_unused1; /* compatibility with old ucred */ 78 }; 79 #define XUCRED_VERSION 0 80 81 #ifdef _KERNEL 82 83 struct proc; 84 85 void change_euid (uid_t euid); 86 void change_ruid (uid_t ruid); 87 struct ucred *cratom (struct ucred **pcr); 88 struct ucred *crcopy (struct ucred *cr); 89 struct ucred *crdup (struct ucred *cr); 90 void crfree (struct ucred *cr); 91 struct ucred *crget (void); 92 struct ucred *crhold (struct ucred *cr); 93 void cru2x (struct ucred *cr, struct xucred *xcr); 94 int groupmember (gid_t gid, struct ucred *cred); 95 #endif /* _KERNEL */ 96 97 #endif /* !_SYS_UCRED_H_ */ 98