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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/acl.h> 32 #include <sys/stat.h> 33 34 #include <err.h> 35 #include <stdio.h> 36 #include <string.h> 37 38 #include "setfacl.h" 39 40 /* 41 * remove ACL entries from an ACL 42 */ 43 int 44 remove_acl(acl_t acl, acl_t *prev_acl) 45 { 46 acl_entry_t entry; 47 acl_t acl_new; 48 acl_tag_t tag; 49 int carried_error, entry_id; 50 51 carried_error = 0; 52 53 if (acl_type == ACL_TYPE_ACCESS) 54 acl_new = acl_dup(prev_acl[ACCESS_ACL]); 55 else 56 acl_new = acl_dup(prev_acl[DEFAULT_ACL]); 57 if (acl_new == NULL) 58 err(1, "acl_dup() failed"); 59 60 tag = ACL_UNDEFINED_TAG; 61 62 /* find and delete the entry */ 63 entry_id = ACL_FIRST_ENTRY; 64 while (acl_get_entry(acl, entry_id, &entry) == 1) { 65 entry_id = ACL_NEXT_ENTRY; 66 if (acl_get_tag_type(entry, &tag) == -1) 67 err(1, "acl_get_tag_type() failed"); 68 if (tag == ACL_MASK) 69 have_mask++; 70 if (acl_delete_entry(acl_new, entry) == -1) { 71 carried_error++; 72 warnx("cannot remove non-existent acl entry"); 73 } 74 } 75 76 if (acl_type == ACL_TYPE_ACCESS) { 77 acl_free(prev_acl[ACCESS_ACL]); 78 prev_acl[ACCESS_ACL] = acl_new; 79 } else { 80 acl_free(prev_acl[DEFAULT_ACL]); 81 prev_acl[DEFAULT_ACL] = acl_new; 82 } 83 84 if (carried_error) 85 return (-1); 86 87 return (0); 88 } 89 90 /* 91 * remove default entries 92 */ 93 int 94 remove_default(acl_t *prev_acl) 95 { 96 97 if (prev_acl[1]) { 98 acl_free(prev_acl[1]); 99 prev_acl[1] = acl_init(ACL_MAX_ENTRIES); 100 if (prev_acl[1] == NULL) 101 err(1, "acl_init() failed"); 102 } else { 103 warn("cannot remove default ACL"); 104 return (-1); 105 } 106 return (0); 107 } 108 109 /* 110 * remove extended entries 111 */ 112 void 113 remove_ext(acl_t *prev_acl) 114 { 115 acl_t acl_new, acl_old; 116 acl_entry_t entry, entry_new; 117 acl_permset_t perm; 118 acl_tag_t tag; 119 int entry_id, have_mask_entry; 120 121 if (acl_type == ACL_TYPE_ACCESS) 122 acl_old = acl_dup(prev_acl[ACCESS_ACL]); 123 else 124 acl_old = acl_dup(prev_acl[DEFAULT_ACL]); 125 if (acl_old == NULL) 126 err(1, "acl_dup() failed"); 127 128 have_mask_entry = 0; 129 acl_new = acl_init(ACL_MAX_ENTRIES); 130 if (acl_new == NULL) 131 err(1, "acl_init() failed"); 132 tag = ACL_UNDEFINED_TAG; 133 134 /* only save the default user/group/other entries */ 135 entry_id = ACL_FIRST_ENTRY; 136 while (acl_get_entry(acl_old, entry_id, &entry) == 1) { 137 entry_id = ACL_NEXT_ENTRY; 138 139 if (acl_get_tag_type(entry, &tag) == -1) 140 err(1, "acl_get_tag_type() failed"); 141 142 switch(tag) { 143 case ACL_USER_OBJ: 144 case ACL_GROUP_OBJ: 145 case ACL_OTHER: 146 if (acl_get_tag_type(entry, &tag) == -1) 147 err(1, "acl_get_tag_type() failed"); 148 if (acl_get_permset(entry, &perm) == -1) 149 err(1, "acl_get_permset() failed"); 150 if (acl_create_entry(&acl_new, &entry_new) == -1) 151 err(1, "acl_create_entry() failed"); 152 if (acl_set_tag_type(entry_new, tag) == -1) 153 err(1, "acl_set_tag_type() failed"); 154 if (acl_set_permset(entry_new, perm) == -1) 155 err(1, "acl_get_permset() failed"); 156 if (acl_copy_entry(entry_new, entry) == -1) 157 err(1, "acl_copy_entry() failed"); 158 break; 159 case ACL_MASK: 160 have_mask_entry = 1; 161 break; 162 default: 163 break; 164 } 165 } 166 if (have_mask_entry && n_flag == 0) { 167 if (acl_calc_mask(&acl_new) == -1) 168 err(1, "acl_calc_mask() failed"); 169 } else { 170 have_mask = 1; 171 } 172 173 if (acl_type == ACL_TYPE_ACCESS) { 174 acl_free(prev_acl[ACCESS_ACL]); 175 prev_acl[ACCESS_ACL] = acl_new; 176 } else { 177 acl_free(prev_acl[DEFAULT_ACL]); 178 prev_acl[DEFAULT_ACL] = acl_new; 179 } 180 } 181