1 /*- 2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * This software was developed by Robert Watson for the TrustedBSD Project. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 /* 29 * acl_get_fd - syscall wrapper for retrieving access ACL by fd 30 * acl_get_fd_np - syscall wrapper for retrieving ACL by fd (non-POSIX) 31 * acl_get_file - syscall wrapper for retrieving ACL by filename 32 * acl_get_link_np - syscall wrapper for retrieving ACL by filename (NOFOLLOW) 33 * (non-POSIX) 34 * acl_get_perm_np() checks if a permission is in the specified 35 * permset (non-POSIX) 36 * acl_get_permset() returns the permission set in the ACL entry 37 * acl_get_qualifier() retrieves the qualifier of the tag from the ACL entry 38 * acl_get_tag_type() returns the tag type for the ACL entry entry_d 39 */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 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 int 136 acl_get_perm_np(acl_permset_t permset_d, acl_perm_t perm) 137 { 138 139 if (permset_d == NULL) { 140 errno = EINVAL; 141 return (-1); 142 } 143 144 switch(perm) { 145 case ACL_READ: 146 case ACL_WRITE: 147 case ACL_EXECUTE: 148 if (*permset_d & perm) 149 return (1); 150 break; 151 default: 152 errno = EINVAL; 153 return (-1); 154 } 155 156 return (0); 157 } 158 159 /* 160 * acl_get_permset() (23.4.17): return via permset_p a descriptor to 161 * the permission set in the ACL entry entry_d. 162 */ 163 int 164 acl_get_permset(acl_entry_t entry_d, acl_permset_t *permset_p) 165 { 166 167 if (entry_d == NULL || permset_p == NULL) { 168 errno = EINVAL; 169 return (-1); 170 } 171 172 *permset_p = &entry_d->ae_perm; 173 174 return (0); 175 } 176 177 /* 178 * acl_get_qualifier() (23.4.18): retrieve the qualifier of the tag 179 * for the ACL entry entry_d. 180 */ 181 void * 182 acl_get_qualifier(acl_entry_t entry_d) 183 { 184 uid_t *retval; 185 186 if (entry_d == NULL) { 187 errno = EINVAL; 188 return (NULL); 189 } 190 191 switch(entry_d->ae_tag) { 192 case ACL_USER: 193 case ACL_GROUP: 194 retval = malloc(sizeof(uid_t)); 195 if (retval == NULL) 196 return (NULL); 197 *retval = entry_d->ae_id; 198 return (retval); 199 } 200 201 errno = EINVAL; 202 return (NULL); 203 } 204 205 /* 206 * acl_get_tag_type() (23.4.19): return the tag type for the ACL 207 * entry entry_p. 208 */ 209 int 210 acl_get_tag_type(acl_entry_t entry_d, acl_tag_t *tag_type_p) 211 { 212 213 if (entry_d == NULL || tag_type_p == NULL) { 214 errno = EINVAL; 215 return (-1); 216 } 217 218 *tag_type_p = entry_d->ae_tag; 219 220 return (0); 221 } 222 223 int 224 acl_get_entry_type_np(acl_entry_t entry_d, acl_entry_type_t *entry_type_p) 225 { 226 227 if (entry_d == NULL || entry_type_p == NULL) { 228 errno = EINVAL; 229 return (-1); 230 } 231 232 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) { 233 errno = EINVAL; 234 return (-1); 235 } 236 237 *entry_type_p = entry_d->ae_entry_type; 238 239 return (0); 240 } 241