1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include <sys/types.h> 45 #include "namespace.h" 46 #include <sys/acl.h> 47 #include "un-namespace.h" 48 49 #include <errno.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #include "acl_support.h" 56 57 acl_t 58 acl_get_file(const char *path_p, acl_type_t type) 59 { 60 acl_t aclp; 61 int error; 62 63 aclp = acl_init(ACL_MAX_ENTRIES); 64 if (aclp == NULL) 65 return (NULL); 66 67 type = _acl_type_unold(type); 68 error = __acl_get_file(path_p, type, &aclp->ats_acl); 69 if (error) { 70 acl_free(aclp); 71 return (NULL); 72 } 73 74 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 75 _acl_brand_from_type(aclp, type); 76 77 return (aclp); 78 } 79 80 acl_t 81 acl_get_link_np(const char *path_p, acl_type_t type) 82 { 83 acl_t aclp; 84 int error; 85 86 aclp = acl_init(ACL_MAX_ENTRIES); 87 if (aclp == NULL) 88 return (NULL); 89 90 type = _acl_type_unold(type); 91 error = __acl_get_link(path_p, type, &aclp->ats_acl); 92 if (error) { 93 acl_free(aclp); 94 return (NULL); 95 } 96 97 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 98 _acl_brand_from_type(aclp, type); 99 100 return (aclp); 101 } 102 103 acl_t 104 acl_get_fd(int fd) 105 { 106 if (fpathconf(fd, _PC_ACL_NFS4) == 1) 107 return (acl_get_fd_np(fd, ACL_TYPE_NFS4)); 108 109 return (acl_get_fd_np(fd, ACL_TYPE_ACCESS)); 110 } 111 112 acl_t 113 acl_get_fd_np(int fd, acl_type_t type) 114 { 115 acl_t aclp; 116 int error; 117 118 aclp = acl_init(ACL_MAX_ENTRIES); 119 if (aclp == NULL) 120 return (NULL); 121 122 type = _acl_type_unold(type); 123 error = ___acl_get_fd(fd, type, &aclp->ats_acl); 124 if (error) { 125 acl_free(aclp); 126 return (NULL); 127 } 128 129 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 130 _acl_brand_from_type(aclp, type); 131 132 return (aclp); 133 } 134 135 /* 136 * acl_get_permset() (23.4.17): return via permset_p a descriptor to 137 * the permission set in the ACL entry entry_d. 138 */ 139 int 140 acl_get_permset(acl_entry_t entry_d, acl_permset_t *permset_p) 141 { 142 143 if (entry_d == NULL || permset_p == NULL) { 144 errno = EINVAL; 145 return (-1); 146 } 147 148 *permset_p = &entry_d->ae_perm; 149 150 return (0); 151 } 152 153 /* 154 * acl_get_qualifier() (23.4.18): retrieve the qualifier of the tag 155 * for the ACL entry entry_d. 156 */ 157 void * 158 acl_get_qualifier(acl_entry_t entry_d) 159 { 160 uid_t *retval; 161 162 if (entry_d == NULL) { 163 errno = EINVAL; 164 return (NULL); 165 } 166 167 switch(entry_d->ae_tag) { 168 case ACL_USER: 169 case ACL_GROUP: 170 retval = malloc(sizeof(uid_t)); 171 if (retval == NULL) 172 return (NULL); 173 *retval = entry_d->ae_id; 174 return (retval); 175 } 176 177 errno = EINVAL; 178 return (NULL); 179 } 180 181 /* 182 * acl_get_tag_type() (23.4.19): return the tag type for the ACL 183 * entry entry_p. 184 */ 185 int 186 acl_get_tag_type(acl_entry_t entry_d, acl_tag_t *tag_type_p) 187 { 188 189 if (entry_d == NULL || tag_type_p == NULL) { 190 errno = EINVAL; 191 return (-1); 192 } 193 194 *tag_type_p = entry_d->ae_tag; 195 196 return (0); 197 } 198 199 int 200 acl_get_entry_type_np(acl_entry_t entry_d, acl_entry_type_t *entry_type_p) 201 { 202 203 if (entry_d == NULL || entry_type_p == NULL) { 204 errno = EINVAL; 205 return (-1); 206 } 207 208 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) { 209 errno = EINVAL; 210 return (-1); 211 } 212 213 *entry_type_p = entry_d->ae_entry_type; 214 215 return (0); 216 } 217