1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 5 * All rights reserved. 6 * 7 * This software was developed by Robert Watson for the TrustedBSD Project. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 /* 31 * acl_get_fd - syscall wrapper for retrieving access ACL by fd 32 * acl_get_fd_np - syscall wrapper for retrieving ACL by fd (non-POSIX) 33 * acl_get_file - syscall wrapper for retrieving ACL by filename 34 * acl_get_link_np - syscall wrapper for retrieving ACL by filename (NOFOLLOW) 35 * (non-POSIX) 36 * acl_get_perm_np() checks if a permission is in the specified 37 * permset (non-POSIX) 38 * acl_get_permset() returns the permission set in the ACL entry 39 * acl_get_qualifier() retrieves the qualifier of the tag from the ACL entry 40 * acl_get_tag_type() returns the tag type for the ACL entry entry_d 41 */ 42 43 #include <sys/cdefs.h> 44 #if 0 45 __FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_get.c 326193 2017-11-25 17:12:48Z pfg $"); 46 #else 47 __RCSID("$NetBSD: acl_get.c,v 1.1 2020/05/16 18:31:47 christos Exp $"); 48 #endif 49 50 #include "namespace.h" 51 #include <sys/types.h> 52 #include <sys/acl.h> 53 54 #include <errno.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 #include "acl_support.h" 61 62 acl_t 63 acl_get_file(const char *path_p, acl_type_t type) 64 { 65 acl_t aclp; 66 int error; 67 68 aclp = acl_init(ACL_MAX_ENTRIES); 69 if (aclp == NULL) 70 return (NULL); 71 72 type = _acl_type_unold(type); 73 error = __acl_get_file(path_p, type, &aclp->ats_acl); 74 if (error) { 75 acl_free(aclp); 76 return (NULL); 77 } 78 79 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 80 _acl_brand_from_type(aclp, type); 81 82 return (aclp); 83 } 84 85 acl_t 86 acl_get_link_np(const char *path_p, acl_type_t type) 87 { 88 acl_t aclp; 89 int error; 90 91 aclp = acl_init(ACL_MAX_ENTRIES); 92 if (aclp == NULL) 93 return (NULL); 94 95 type = _acl_type_unold(type); 96 error = __acl_get_link(path_p, type, &aclp->ats_acl); 97 if (error) { 98 acl_free(aclp); 99 return (NULL); 100 } 101 102 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 103 _acl_brand_from_type(aclp, type); 104 105 return (aclp); 106 } 107 108 acl_t 109 acl_get_fd(int fd) 110 { 111 if (fpathconf(fd, _PC_ACL_NFS4) == 1) 112 return (acl_get_fd_np(fd, ACL_TYPE_NFS4)); 113 114 return (acl_get_fd_np(fd, ACL_TYPE_ACCESS)); 115 } 116 117 acl_t 118 acl_get_fd_np(int fd, acl_type_t type) 119 { 120 acl_t aclp; 121 int error; 122 123 aclp = acl_init(ACL_MAX_ENTRIES); 124 if (aclp == NULL) 125 return (NULL); 126 127 type = _acl_type_unold(type); 128 error = __acl_get_fd(fd, type, &aclp->ats_acl); 129 if (error) { 130 acl_free(aclp); 131 return (NULL); 132 } 133 134 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 135 _acl_brand_from_type(aclp, type); 136 137 return (aclp); 138 } 139 140 /* 141 * acl_get_permset() (23.4.17): return via permset_p a descriptor to 142 * the permission set in the ACL entry entry_d. 143 */ 144 int 145 acl_get_permset(acl_entry_t entry_d, acl_permset_t *permset_p) 146 { 147 148 if (entry_d == NULL || permset_p == NULL) { 149 errno = EINVAL; 150 return (-1); 151 } 152 153 *permset_p = &entry_d->ae_perm; 154 155 return (0); 156 } 157 158 /* 159 * acl_get_qualifier() (23.4.18): retrieve the qualifier of the tag 160 * for the ACL entry entry_d. 161 */ 162 void * 163 acl_get_qualifier(acl_entry_t entry_d) 164 { 165 uid_t *retval; 166 167 if (entry_d == NULL) { 168 errno = EINVAL; 169 return (NULL); 170 } 171 172 switch(entry_d->ae_tag) { 173 case ACL_USER: 174 case ACL_GROUP: 175 retval = malloc(sizeof(uid_t)); 176 if (retval == NULL) 177 return (NULL); 178 *retval = entry_d->ae_id; 179 return (retval); 180 } 181 182 errno = EINVAL; 183 return (NULL); 184 } 185 186 /* 187 * acl_get_tag_type() (23.4.19): return the tag type for the ACL 188 * entry entry_p. 189 */ 190 int 191 acl_get_tag_type(acl_entry_t entry_d, acl_tag_t *tag_type_p) 192 { 193 194 if (entry_d == NULL || tag_type_p == NULL) { 195 errno = EINVAL; 196 return (-1); 197 } 198 199 *tag_type_p = entry_d->ae_tag; 200 201 return (0); 202 } 203 204 int 205 acl_get_entry_type_np(acl_entry_t entry_d, acl_entry_type_t *entry_type_p) 206 { 207 208 if (entry_d == NULL || entry_type_p == NULL) { 209 errno = EINVAL; 210 return (-1); 211 } 212 213 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) { 214 errno = EINVAL; 215 return (-1); 216 } 217 218 *entry_type_p = entry_d->ae_entry_type; 219 220 return (0); 221 } 222
Indexes created Sat Sep 20 22:09:52 GMT 2025