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