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/types.h> 44 #include "namespace.h" 45 #include <sys/acl.h> 46 #include "un-namespace.h" 47 48 #include <errno.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include "acl_support.h" 55 56 acl_t 57 acl_get_file(const char *path_p, acl_type_t type) 58 { 59 acl_t aclp; 60 int error; 61 62 aclp = acl_init(ACL_MAX_ENTRIES); 63 if (aclp == NULL) 64 return (NULL); 65 66 type = _acl_type_unold(type); 67 error = __acl_get_file(path_p, type, &aclp->ats_acl); 68 if (error) { 69 acl_free(aclp); 70 return (NULL); 71 } 72 73 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 74 _acl_brand_from_type(aclp, type); 75 76 return (aclp); 77 } 78 79 acl_t 80 acl_get_link_np(const char *path_p, acl_type_t type) 81 { 82 acl_t aclp; 83 int error; 84 85 aclp = acl_init(ACL_MAX_ENTRIES); 86 if (aclp == NULL) 87 return (NULL); 88 89 type = _acl_type_unold(type); 90 error = __acl_get_link(path_p, type, &aclp->ats_acl); 91 if (error) { 92 acl_free(aclp); 93 return (NULL); 94 } 95 96 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 97 _acl_brand_from_type(aclp, type); 98 99 return (aclp); 100 } 101 102 acl_t 103 acl_get_fd(int fd) 104 { 105 if (fpathconf(fd, _PC_ACL_NFS4) == 1) 106 return (acl_get_fd_np(fd, ACL_TYPE_NFS4)); 107 108 return (acl_get_fd_np(fd, ACL_TYPE_ACCESS)); 109 } 110 111 acl_t 112 acl_get_fd_np(int fd, acl_type_t type) 113 { 114 acl_t aclp; 115 int error; 116 117 aclp = acl_init(ACL_MAX_ENTRIES); 118 if (aclp == NULL) 119 return (NULL); 120 121 type = _acl_type_unold(type); 122 error = ___acl_get_fd(fd, type, &aclp->ats_acl); 123 if (error) { 124 acl_free(aclp); 125 return (NULL); 126 } 127 128 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 129 _acl_brand_from_type(aclp, type); 130 131 return (aclp); 132 } 133 134 /* 135 * acl_get_permset() (23.4.17): return via permset_p a descriptor to 136 * the permission set in the ACL entry entry_d. 137 */ 138 int 139 acl_get_permset(acl_entry_t entry_d, acl_permset_t *permset_p) 140 { 141 142 if (entry_d == NULL || permset_p == NULL) { 143 errno = EINVAL; 144 return (-1); 145 } 146 147 *permset_p = &entry_d->ae_perm; 148 149 return (0); 150 } 151 152 /* 153 * acl_get_qualifier() (23.4.18): retrieve the qualifier of the tag 154 * for the ACL entry entry_d. 155 */ 156 void * 157 acl_get_qualifier(acl_entry_t entry_d) 158 { 159 uid_t *retval; 160 161 if (entry_d == NULL) { 162 errno = EINVAL; 163 return (NULL); 164 } 165 166 switch(entry_d->ae_tag) { 167 case ACL_USER: 168 case ACL_GROUP: 169 retval = malloc(sizeof(uid_t)); 170 if (retval == NULL) 171 return (NULL); 172 *retval = entry_d->ae_id; 173 return (retval); 174 } 175 176 errno = EINVAL; 177 return (NULL); 178 } 179 180 /* 181 * acl_get_tag_type() (23.4.19): return the tag type for the ACL 182 * entry entry_p. 183 */ 184 int 185 acl_get_tag_type(acl_entry_t entry_d, acl_tag_t *tag_type_p) 186 { 187 188 if (entry_d == NULL || tag_type_p == NULL) { 189 errno = EINVAL; 190 return (-1); 191 } 192 193 *tag_type_p = entry_d->ae_tag; 194 195 return (0); 196 } 197 198 int 199 acl_get_entry_type_np(acl_entry_t entry_d, acl_entry_type_t *entry_type_p) 200 { 201 202 if (entry_d == NULL || entry_type_p == NULL) { 203 errno = EINVAL; 204 return (-1); 205 } 206 207 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) { 208 errno = EINVAL; 209 return (-1); 210 } 211 212 *entry_type_p = entry_d->ae_entry_type; 213 214 return (0); 215 } 216