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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ucred.h 8.4 (Berkeley) 1/9/95 30 * $FreeBSD: stable/9/sys/sys/ucred.h 293898 2016-01-14 09:11:48Z glebius $ 31 */ 32 33 #ifndef _SYS_UCRED_H_ 34 #define _SYS_UCRED_H_ 35 36 #include <bsm/audit.h> 37 38 struct loginclass; 39 40 /* 41 * Credentials. 42 * 43 * Please do not inspect cr_uid directly to determine superuserness. The 44 * priv(9) interface should be used to check for privilege. 45 */ 46 #if defined(_KERNEL) || defined(_WANT_UCRED) 47 struct ucred { 48 u_int cr_ref; /* reference count */ 49 #define cr_startcopy cr_uid 50 uid_t cr_uid; /* effective user id */ 51 uid_t cr_ruid; /* real user id */ 52 uid_t cr_svuid; /* saved user id */ 53 int cr_ngroups; /* number of groups */ 54 gid_t cr_rgid; /* real group id */ 55 gid_t cr_svgid; /* saved group id */ 56 struct uidinfo *cr_uidinfo; /* per euid resource consumption */ 57 struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */ 58 struct prison *cr_prison; /* jail(2) */ 59 struct loginclass *cr_loginclass; /* login class */ 60 u_int cr_flags; /* credential flags */ 61 void *cr_pspare2[2]; /* general use 2 */ 62 #define cr_endcopy cr_label 63 struct label *cr_label; /* MAC label */ 64 struct auditinfo_addr cr_audit; /* Audit properties. */ 65 gid_t *cr_groups; /* groups */ 66 int cr_agroups; /* Available groups */ 67 }; 68 #define NOCRED ((struct ucred *)0) /* no credential available */ 69 #define FSCRED ((struct ucred *)-1) /* filesystem credential */ 70 #endif /* _KERNEL || _WANT_UCRED */ 71 72 #define XU_NGROUPS 16 73 74 /* 75 * Flags for cr_flags. 76 */ 77 #define CRED_FLAG_CAPMODE 0x00000001 /* In capability mode. */ 78 79 /* 80 * This is the external representation of struct ucred. 81 */ 82 struct xucred { 83 u_int cr_version; /* structure layout version */ 84 uid_t cr_uid; /* effective user id */ 85 short cr_ngroups; /* number of groups */ 86 gid_t cr_groups[XU_NGROUPS]; /* groups */ 87 void *_cr_unused1; /* compatibility with old ucred */ 88 }; 89 #define XUCRED_VERSION 0 90 91 /* This can be used for both ucred and xucred structures. */ 92 #define cr_gid cr_groups[0] 93 94 #ifdef _KERNEL 95 struct proc; 96 struct thread; 97 98 void change_egid(struct ucred *newcred, gid_t egid); 99 void change_euid(struct ucred *newcred, struct uidinfo *euip); 100 void change_rgid(struct ucred *newcred, gid_t rgid); 101 void change_ruid(struct ucred *newcred, struct uidinfo *ruip); 102 void change_svgid(struct ucred *newcred, gid_t svgid); 103 void change_svuid(struct ucred *newcred, uid_t svuid); 104 void crcopy(struct ucred *dest, struct ucred *src); 105 struct ucred *crcopysafe(struct proc *p, struct ucred *cr); 106 struct ucred *crdup(struct ucred *cr); 107 void crextend(struct ucred *cr, int n); 108 void cred_update_thread(struct thread *td); 109 void crfree(struct ucred *cr); 110 struct ucred *crget(void); 111 struct ucred *crhold(struct ucred *cr); 112 int crshared(struct ucred *cr); 113 void cru2x(struct ucred *cr, struct xucred *xcr); 114 void crsetgroups(struct ucred *cr, int n, gid_t *groups); 115 int groupmember(gid_t gid, struct ucred *cred); 116 #endif /* _KERNEL */ 117 118 #endif /* !_SYS_UCRED_H_ */ 119