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 1.9 2007/01/08 21:32:57 corecode Exp $ 36 */ 37 38 #ifndef _SYS_UCRED_H_ 39 #define _SYS_UCRED_H_ 40 41 #ifndef _SYS_TYPES_H_ 42 #include <sys/types.h> 43 #endif 44 #ifndef _SYS_PARAM_H_ 45 #include <sys/param.h> 46 #endif 47 #ifndef _SYS_SPINLOCK_H_ 48 #include <sys/spinlock.h> 49 #endif 50 51 struct prison; 52 53 /* 54 * Credentials. 55 * 56 * Please do not inspect cr_uid directly to determine superuserness. 57 * Only the priv(9) functions should be used for this. 58 */ 59 struct ucred { 60 int cr_ref; /* reference count */ 61 uid_t cr_uid; /* effective user id */ 62 short cr_ngroups; /* number of groups */ 63 gid_t cr_groups[NGROUPS]; /* groups */ 64 struct uidinfo *cr_uidinfo; /* per uid resource consumption */ 65 struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */ 66 struct prison *cr_prison; /* prison info */ 67 uid_t cr_ruid; /* Real user id. */ 68 uid_t cr_svuid; /* Saved effective user id. */ 69 gid_t cr_rgid; /* Real group id. */ 70 gid_t cr_svgid; /* Saved effective group id. */ 71 }; 72 #define cr_gid cr_groups[0] 73 #define NOCRED ((struct ucred *)0) /* no credential available */ 74 #define FSCRED ((struct ucred *)-1) /* filesystem credential */ 75 76 /* 77 * This is the external representation of struct ucred, based upon the 78 * size of a 4.2-RELEASE struct ucred. There will probably never be 79 * any need to change the size of this or layout of its used fields. 80 */ 81 struct xucred { 82 u_int cr_version; /* structure layout version */ 83 uid_t cr_uid; /* effective user id */ 84 short cr_ngroups; /* number of groups */ 85 gid_t cr_groups[NGROUPS]; /* groups */ 86 void *_cr_unused1; /* compatibility with old ucred */ 87 }; 88 #define XUCRED_VERSION 0 89 90 #ifdef _KERNEL 91 92 struct proc; 93 94 struct ucred *change_euid (uid_t euid); 95 struct ucred *change_ruid (uid_t ruid); 96 struct ucred *cratom (struct ucred **pcr); 97 struct ucred *crcopy (struct ucred *cr); 98 struct ucred *crdup (struct ucred *cr); 99 void crfree (struct ucred *cr); 100 void crinit (struct ucred *cr); 101 struct ucred *crget (void); 102 struct ucred *crhold (struct ucred *cr); 103 void cru2x (struct ucred *cr, struct xucred *xcr); 104 int groupmember (gid_t gid, struct ucred *cred); 105 #endif /* _KERNEL */ 106 107 #endif /* !_SYS_UCRED_H_ */ 108