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 * $FreeBSD$ 27 */ 28 /* 29 * acl_get_file - syscall wrapper for retrieving ACL by filename 30 * acl_get_fd - syscall wrapper for retrieving access ACL by fd 31 * acl_get_fd_np - syscall wrapper for retrieving ACL by fd (non-POSIX) 32 * acl_get_perm_np() checks if a permission is in the specified 33 * permset (non-POSIX) 34 * acl_get_permset() returns the permission set in the ACL entry 35 * acl_get_qualifier() retrieves the qualifier of the tag from the ACL entry 36 * acl_get_tag_type() returns the tag type for the ACL entry entry_d 37 */ 38 39 #include <sys/types.h> 40 #include "namespace.h" 41 #include <sys/acl.h> 42 #include "un-namespace.h" 43 44 #include <errno.h> 45 #include <stdlib.h> 46 #include <string.h> 47 48 acl_t 49 acl_get_file(const char *path_p, acl_type_t type) 50 { 51 acl_t aclp; 52 int error; 53 54 aclp = acl_init(ACL_MAX_ENTRIES); 55 if (aclp == NULL) 56 return (NULL); 57 58 error = __acl_get_file(path_p, type, &aclp->ats_acl); 59 if (error) { 60 acl_free(aclp); 61 return (NULL); 62 } 63 64 return (aclp); 65 } 66 67 acl_t 68 acl_get_fd(int fd) 69 { 70 acl_t aclp; 71 int error; 72 73 aclp = acl_init(ACL_MAX_ENTRIES); 74 if (aclp == NULL) 75 return (NULL); 76 77 error = ___acl_get_fd(fd, ACL_TYPE_ACCESS, &aclp->ats_acl); 78 if (error) { 79 acl_free(aclp); 80 return (NULL); 81 } 82 83 return (aclp); 84 } 85 86 acl_t 87 acl_get_fd_np(int fd, acl_type_t type) 88 { 89 acl_t aclp; 90 int error; 91 92 aclp = acl_init(ACL_MAX_ENTRIES); 93 if (aclp == NULL) 94 return (NULL); 95 96 error = ___acl_get_fd(fd, type, &aclp->ats_acl); 97 if (error) { 98 acl_free(aclp); 99 return (NULL); 100 } 101 102 return (aclp); 103 } 104 105 int 106 acl_get_perm_np(acl_permset_t permset_d, acl_perm_t perm) 107 { 108 109 if (permset_d == NULL) { 110 errno = EINVAL; 111 return (-1); 112 } 113 114 switch(perm) { 115 case ACL_READ: 116 case ACL_WRITE: 117 case ACL_EXECUTE: 118 if (*permset_d & perm) 119 return (1); 120 break; 121 default: 122 errno = EINVAL; 123 return (-1); 124 } 125 126 return (0); 127 } 128 129 /* 130 * acl_get_permset() (23.4.17): return via permset_p a descriptor to 131 * the permission set in the ACL entry entry_d. 132 */ 133 int 134 acl_get_permset(acl_entry_t entry_d, acl_permset_t *permset_p) 135 { 136 137 if (entry_d == NULL || permset_p == NULL) { 138 errno = EINVAL; 139 return (-1); 140 } 141 142 *permset_p = &entry_d->ae_perm; 143 144 return (0); 145 } 146 147 /* 148 * acl_get_qualifier() (23.4.18): retrieve the qualifier of the tag 149 * for the ACL entry entry_d. 150 */ 151 void * 152 acl_get_qualifier(acl_entry_t entry_d) 153 { 154 uid_t *retval; 155 156 if (entry_d == NULL) { 157 errno = EINVAL; 158 return (NULL); 159 } 160 161 switch(entry_d->ae_tag) { 162 case ACL_USER: 163 case ACL_GROUP: 164 retval = malloc(sizeof(uid_t)); 165 if (retval == NULL) 166 return (NULL); 167 *retval = entry_d->ae_id; 168 return (retval); 169 } 170 171 errno = EINVAL; 172 return (NULL); 173 } 174 175 /* 176 * acl_get_tag_type() (23.4.19): return the tag type for the ACL 177 * entry entry_p. 178 */ 179 int 180 acl_get_tag_type(acl_entry_t entry_d, acl_tag_t *tag_type_p) 181 { 182 183 if (entry_d == NULL || tag_type_p == NULL) { 184 errno = EINVAL; 185 return (-1); 186 } 187 188 *tag_type_p = entry_d->ae_tag; 189 190 return (0); 191 } 192