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