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, const char *filename) 45 { 46 acl_entry_t entry; 47 acl_t acl_new; 48 acl_tag_t tag; 49 int carried_error, entry_id, acl_brand, prev_acl_brand; 50 51 carried_error = 0; 52 53 acl_get_brand_np(acl, &acl_brand); 54 acl_get_brand_np(*prev_acl, &prev_acl_brand); 55 56 if (acl_brand != prev_acl_brand) { 57 warnx("%s: branding mismatch; existing ACL is %s, " 58 "entry to be removed is %s", filename, 59 prev_acl_brand == ACL_BRAND_NFS4 ? "NFSv4" : "POSIX.1e", 60 acl_brand == ACL_BRAND_NFS4 ? "NFSv4" : "POSIX.1e"); 61 return (-1); 62 } 63 64 carried_error = 0; 65 66 acl_new = acl_dup(*prev_acl); 67 if (acl_new == NULL) 68 err(1, "%s: acl_dup() failed", filename); 69 70 tag = ACL_UNDEFINED_TAG; 71 72 /* find and delete the entry */ 73 entry_id = ACL_FIRST_ENTRY; 74 while (acl_get_entry(acl, entry_id, &entry) == 1) { 75 entry_id = ACL_NEXT_ENTRY; 76 if (acl_get_tag_type(entry, &tag) == -1) 77 err(1, "%s: acl_get_tag_type() failed", filename); 78 if (tag == ACL_MASK) 79 have_mask++; 80 if (acl_delete_entry(acl_new, entry) == -1) { 81 carried_error++; 82 warnx("%s: cannot remove non-existent ACL entry", 83 filename); 84 } 85 } 86 87 acl_free(*prev_acl); 88 *prev_acl = acl_new; 89 90 if (carried_error) 91 return (-1); 92 93 return (0); 94 } 95 96 int 97 remove_by_number(uint entry_number, acl_t *prev_acl, const char *filename) 98 { 99 acl_entry_t entry; 100 acl_t acl_new; 101 acl_tag_t tag; 102 int carried_error, entry_id; 103 uint i; 104 105 carried_error = 0; 106 107 acl_new = acl_dup(*prev_acl); 108 if (acl_new == NULL) 109 err(1, "%s: acl_dup() failed", filename); 110 111 tag = ACL_UNDEFINED_TAG; 112 113 /* 114 * Find out whether we're removing the mask entry, 115 * to behave the same as the routine above. 116 * 117 * XXX: Is this loop actually needed? 118 */ 119 entry_id = ACL_FIRST_ENTRY; 120 i = 0; 121 while (acl_get_entry(acl_new, entry_id, &entry) == 1) { 122 entry_id = ACL_NEXT_ENTRY; 123 if (i != entry_number) 124 continue; 125 if (acl_get_tag_type(entry, &tag) == -1) 126 err(1, "%s: acl_get_tag_type() failed", filename); 127 if (tag == ACL_MASK) 128 have_mask++; 129 } 130 131 if (acl_delete_entry_np(acl_new, entry_number) == -1) { 132 carried_error++; 133 warn("%s: acl_delete_entry_np() failed", filename); 134 } 135 136 acl_free(*prev_acl); 137 *prev_acl = acl_new; 138 139 if (carried_error) 140 return (-1); 141 142 return (0); 143 } 144 145 /* 146 * remove default entries 147 */ 148 int 149 remove_default(acl_t *prev_acl, const char *filename) 150 { 151 152 acl_free(*prev_acl); 153 *prev_acl = acl_init(ACL_MAX_ENTRIES); 154 if (*prev_acl == NULL) 155 err(1, "%s: acl_init() failed", filename); 156 157 return (0); 158 } 159 160 /* 161 * remove extended entries 162 */ 163 void 164 remove_ext(acl_t *prev_acl, const char *filename) 165 { 166 acl_t acl_new; 167 168 acl_new = acl_strip_np(*prev_acl, !n_flag); 169 if (acl_new == NULL) 170 err(1, "%s: acl_strip_np() failed", filename); 171 172 acl_free(*prev_acl); 173 *prev_acl = acl_new; 174 } 175