1 /* 2 * Copyright (c) 2001 Chris D. Faulhaber 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 THE VOICES IN HIS HEAD BE 18 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 * POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/types.h> 30 #include <sys/acl.h> 31 #include <sys/stat.h> 32 33 #include <err.h> 34 #include <stdio.h> 35 #include <string.h> 36 37 #include "setfacl.h" 38 39 /* 40 * remove ACL entries from an ACL 41 */ 42 int 43 remove_acl(acl_t acl, acl_t *prev_acl) 44 { 45 acl_entry_t entry; 46 acl_t acl_new; 47 acl_tag_t tag; 48 int carried_error, entry_id; 49 50 carried_error = 0; 51 52 if (acl_type == ACL_TYPE_ACCESS) 53 acl_new = acl_dup(prev_acl[ACCESS_ACL]); 54 else 55 acl_new = acl_dup(prev_acl[DEFAULT_ACL]); 56 if (acl_new == NULL) 57 err(1, "acl_dup() failed"); 58 59 tag = ACL_UNDEFINED_TAG; 60 61 /* find and delete the entry */ 62 entry_id = ACL_FIRST_ENTRY; 63 while (acl_get_entry(acl, entry_id, &entry) == 1) { 64 entry_id = ACL_NEXT_ENTRY; 65 if (acl_get_tag_type(entry, &tag) == -1) 66 err(1, "acl_get_tag_type() failed"); 67 if (tag == ACL_MASK) 68 have_mask++; 69 if (acl_delete_entry(acl_new, entry) == -1) { 70 carried_error++; 71 warnx("cannot remove non-existent acl entry"); 72 } 73 } 74 75 if (acl_type == ACL_TYPE_ACCESS) { 76 acl_free(prev_acl[ACCESS_ACL]); 77 prev_acl[ACCESS_ACL] = acl_new; 78 } else { 79 acl_free(prev_acl[DEFAULT_ACL]); 80 prev_acl[DEFAULT_ACL] = acl_new; 81 } 82 83 if (carried_error) 84 return (-1); 85 86 return (0); 87 } 88 89 /* 90 * remove default entries 91 */ 92 int 93 remove_default(acl_t *prev_acl) 94 { 95 96 if (prev_acl[1]) { 97 acl_free(prev_acl[1]); 98 prev_acl[1] = acl_init(ACL_MAX_ENTRIES); 99 if (prev_acl[1] == NULL) 100 err(1, "acl_init() failed"); 101 } else { 102 warn("cannot remove default ACL"); 103 return (-1); 104 } 105 return (0); 106 } 107 108 /* 109 * remove extended entries 110 */ 111 void 112 remove_ext(acl_t *prev_acl) 113 { 114 acl_t acl_new, acl_old; 115 acl_entry_t entry, entry_new; 116 acl_permset_t perm; 117 acl_tag_t tag; 118 int entry_id, have_mask_entry; 119 120 if (acl_type == ACL_TYPE_ACCESS) 121 acl_old = acl_dup(prev_acl[ACCESS_ACL]); 122 else 123 acl_old = acl_dup(prev_acl[DEFAULT_ACL]); 124 if (acl_old == NULL) 125 err(1, "acl_dup() failed"); 126 127 have_mask_entry = 0; 128 acl_new = acl_init(ACL_MAX_ENTRIES); 129 if (acl_new == NULL) 130 err(1, "acl_init() failed"); 131 tag = ACL_UNDEFINED_TAG; 132 133 /* only save the default user/group/other entries */ 134 entry_id = ACL_FIRST_ENTRY; 135 while (acl_get_entry(acl_old, entry_id, &entry) == 1) { 136 entry_id = ACL_NEXT_ENTRY; 137 138 if (acl_get_tag_type(entry, &tag) == -1) 139 err(1, "acl_get_tag_type() failed"); 140 141 switch(tag) { 142 case ACL_USER_OBJ: 143 case ACL_GROUP_OBJ: 144 case ACL_OTHER: 145 if (acl_get_tag_type(entry, &tag) == -1) 146 err(1, "acl_get_tag_type() failed"); 147 if (acl_get_permset(entry, &perm) == -1) 148 err(1, "acl_get_permset() failed"); 149 if (acl_create_entry(&acl_new, &entry_new) == -1) 150 err(1, "acl_create_entry() failed"); 151 if (acl_set_tag_type(entry_new, tag) == -1) 152 err(1, "acl_set_tag_type() failed"); 153 if (acl_set_permset(entry_new, perm) == -1) 154 err(1, "acl_get_permset() failed"); 155 if (acl_copy_entry(entry_new, entry) == -1) 156 err(1, "acl_copy_entry() failed"); 157 break; 158 case ACL_MASK: 159 have_mask_entry = 1; 160 break; 161 default: 162 break; 163 } 164 } 165 if (have_mask_entry && n_flag == 0) { 166 if (acl_calc_mask(&acl_new) == -1) 167 err(1, "acl_calc_mask() failed"); 168 } else { 169 have_mask = 1; 170 } 171 172 if (acl_type == ACL_TYPE_ACCESS) { 173 acl_free(prev_acl[ACCESS_ACL]); 174 prev_acl[ACCESS_ACL] = acl_new; 175 } else { 176 acl_free(prev_acl[DEFAULT_ACL]); 177 prev_acl[DEFAULT_ACL] = acl_new; 178 } 179 } 180