1 /*- 2 * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 /* 27 * acl_get_file - syscall wrapper for retrieving ACL by filename 28 * acl_get_fd - syscall wrapper for retrieving access ACL by fd 29 * acl_get_fd_np - syscall wrapper for retrieving ACL by fd (non-POSIX) 30 * acl_get_perm_np() checks if a permission is in the specified 31 * permset (non-POSIX) 32 * acl_get_permset() returns the permission set in the ACL entry 33 * acl_get_qualifier() retrieves the qualifier of the tag from the ACL entry 34 * acl_get_tag_type() returns the tag type for the ACL entry entry_d 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/types.h> 41 #include "namespace.h" 42 #include <sys/acl.h> 43 #include "un-namespace.h" 44 45 #include <errno.h> 46 #include <stdlib.h> 47 #include <string.h> 48 49 acl_t 50 acl_get_file(const char *path_p, acl_type_t type) 51 { 52 acl_t aclp; 53 int error; 54 55 aclp = acl_init(ACL_MAX_ENTRIES); 56 if (aclp == NULL) 57 return (NULL); 58 59 error = __acl_get_file(path_p, type, &aclp->ats_acl); 60 if (error) { 61 acl_free(aclp); 62 return (NULL); 63 } 64 65 return (aclp); 66 } 67 68 acl_t 69 acl_get_fd(int fd) 70 { 71 acl_t aclp; 72 int error; 73 74 aclp = acl_init(ACL_MAX_ENTRIES); 75 if (aclp == NULL) 76 return (NULL); 77 78 error = ___acl_get_fd(fd, ACL_TYPE_ACCESS, &aclp->ats_acl); 79 if (error) { 80 acl_free(aclp); 81 return (NULL); 82 } 83 84 return (aclp); 85 } 86 87 acl_t 88 acl_get_fd_np(int fd, acl_type_t type) 89 { 90 acl_t aclp; 91 int error; 92 93 aclp = acl_init(ACL_MAX_ENTRIES); 94 if (aclp == NULL) 95 return (NULL); 96 97 error = ___acl_get_fd(fd, type, &aclp->ats_acl); 98 if (error) { 99 acl_free(aclp); 100 return (NULL); 101 } 102 103 return (aclp); 104 } 105 106 int 107 acl_get_perm_np(acl_permset_t permset_d, acl_perm_t perm) 108 { 109 110 if (permset_d == NULL) { 111 errno = EINVAL; 112 return (-1); 113 } 114 115 switch(perm) { 116 case ACL_READ: 117 case ACL_WRITE: 118 case ACL_EXECUTE: 119 if (*permset_d & perm) 120 return (1); 121 break; 122 default: 123 errno = EINVAL; 124 return (-1); 125 } 126 127 return (0); 128 } 129 130 /* 131 * acl_get_permset() (23.4.17): return via permset_p a descriptor to 132 * the permission set in the ACL entry entry_d. 133 */ 134 int 135 acl_get_permset(acl_entry_t entry_d, acl_permset_t *permset_p) 136 { 137 138 if (entry_d == NULL || permset_p == NULL) { 139 errno = EINVAL; 140 return (-1); 141 } 142 143 *permset_p = &entry_d->ae_perm; 144 145 return (0); 146 } 147 148 /* 149 * acl_get_qualifier() (23.4.18): retrieve the qualifier of the tag 150 * for the ACL entry entry_d. 151 */ 152 void * 153 acl_get_qualifier(acl_entry_t entry_d) 154 { 155 uid_t *retval; 156 157 if (entry_d == NULL) { 158 errno = EINVAL; 159 return (NULL); 160 } 161 162 switch(entry_d->ae_tag) { 163 case ACL_USER: 164 case ACL_GROUP: 165 retval = malloc(sizeof(uid_t)); 166 if (retval == NULL) 167 return (NULL); 168 *retval = entry_d->ae_id; 169 return (retval); 170 } 171 172 errno = EINVAL; 173 return (NULL); 174 } 175 176 /* 177 * acl_get_tag_type() (23.4.19): return the tag type for the ACL 178 * entry entry_p. 179 */ 180 int 181 acl_get_tag_type(acl_entry_t entry_d, acl_tag_t *tag_type_p) 182 { 183 184 if (entry_d == NULL || tag_type_p == NULL) { 185 errno = EINVAL; 186 return (-1); 187 } 188 189 *tag_type_p = entry_d->ae_tag; 190 191 return (0); 192 } 193