1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001-2002 Chris D. Faulhaber 5 * All rights reserved. 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 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include "namespace.h" 34 #include <sys/acl.h> 35 #include "un-namespace.h" 36 37 #include <errno.h> 38 #include <stdlib.h> 39 40 /* 41 * acl_create_entry() (23.4.7): create a new ACL entry in the ACL pointed 42 * to by acl_p. 43 */ 44 int 45 acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p) 46 { 47 struct acl *acl_int; 48 49 if (acl_p == NULL) { 50 errno = EINVAL; 51 return (-1); 52 } 53 54 acl_int = &(*acl_p)->ats_acl; 55 56 /* 57 * +1, because we are checking if there is space left for one more 58 * entry. 59 */ 60 if (acl_int->acl_cnt + 1 >= ACL_MAX_ENTRIES) { 61 errno = EINVAL; 62 return (-1); 63 } 64 65 *entry_p = &acl_int->acl_entry[acl_int->acl_cnt++]; 66 67 (**entry_p).ae_tag = ACL_UNDEFINED_TAG; 68 (**entry_p).ae_id = ACL_UNDEFINED_ID; 69 (**entry_p).ae_perm = ACL_PERM_NONE; 70 (**entry_p).ae_entry_type = 0; 71 (**entry_p).ae_flags = 0; 72 73 (*acl_p)->ats_cur_entry = 0; 74 75 return (0); 76 } 77 78 int 79 acl_create_entry_np(acl_t *acl_p, acl_entry_t *entry_p, int offset) 80 { 81 int i; 82 struct acl *acl_int; 83 84 if (acl_p == NULL) { 85 errno = EINVAL; 86 return (-1); 87 } 88 89 acl_int = &(*acl_p)->ats_acl; 90 91 if (acl_int->acl_cnt + 1 >= ACL_MAX_ENTRIES) { 92 errno = EINVAL; 93 return (-1); 94 } 95 96 if (offset < 0 || offset > acl_int->acl_cnt) { 97 errno = EINVAL; 98 return (-1); 99 } 100 101 /* Make room for the new entry. */ 102 for (i = acl_int->acl_cnt; i > offset; i--) 103 acl_int->acl_entry[i] = acl_int->acl_entry[i - 1]; 104 105 acl_int->acl_cnt++; 106 107 *entry_p = &acl_int->acl_entry[offset]; 108 109 (**entry_p).ae_tag = ACL_UNDEFINED_TAG; 110 (**entry_p).ae_id = ACL_UNDEFINED_ID; 111 (**entry_p).ae_perm = ACL_PERM_NONE; 112 (**entry_p).ae_entry_type = 0; 113 (**entry_p).ae_flags= 0; 114 115 (*acl_p)->ats_cur_entry = 0; 116 117 return (0); 118 } 119 120 /* 121 * acl_get_entry() (23.4.14): returns an ACL entry from an ACL 122 * indicated by entry_id. 123 */ 124 int 125 acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p) 126 { 127 struct acl *acl_int; 128 129 if (acl == NULL) { 130 errno = EINVAL; 131 return (-1); 132 } 133 acl_int = &acl->ats_acl; 134 135 switch(entry_id) { 136 case ACL_FIRST_ENTRY: 137 acl->ats_cur_entry = 0; 138 /* PASSTHROUGH */ 139 case ACL_NEXT_ENTRY: 140 if (acl->ats_cur_entry >= acl->ats_acl.acl_cnt) 141 return 0; 142 *entry_p = &acl_int->acl_entry[acl->ats_cur_entry++]; 143 return (1); 144 } 145 146 errno = EINVAL; 147 return (-1); 148 } 149