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 CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * 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
36 #include "setfacl.h"
37
38 /*
39 * remove ACL entries from an ACL
40 */
41 int
remove_acl(acl_t acl,acl_t * prev_acl,const char * filename)42 remove_acl(acl_t acl, acl_t *prev_acl, const char *filename)
43 {
44 acl_entry_t entry;
45 acl_t acl_new;
46 acl_tag_t tag;
47 int carried_error, entry_id, acl_brand, prev_acl_brand;
48
49 carried_error = 0;
50
51 acl_get_brand_np(acl, &acl_brand);
52 acl_get_brand_np(*prev_acl, &prev_acl_brand);
53
54 if (branding_mismatch(acl_brand, prev_acl_brand)) {
55 warnx("%s: branding mismatch; existing ACL is %s, "
56 "entry to be removed is %s", filename,
57 brand_name(prev_acl_brand), brand_name(acl_brand));
58 return (-1);
59 }
60
61 carried_error = 0;
62
63 acl_new = acl_dup(*prev_acl);
64 if (acl_new == NULL)
65 err(1, "%s: acl_dup() failed", filename);
66
67 tag = ACL_UNDEFINED_TAG;
68
69 /* find and delete the entry */
70 entry_id = ACL_FIRST_ENTRY;
71 while (acl_get_entry(acl, entry_id, &entry) == 1) {
72 entry_id = ACL_NEXT_ENTRY;
73 if (acl_get_tag_type(entry, &tag) == -1)
74 err(1, "%s: acl_get_tag_type() failed", filename);
75 if (tag == ACL_MASK)
76 have_mask = true;
77 if (acl_delete_entry(acl_new, entry) == -1) {
78 carried_error++;
79 warnx("%s: cannot remove non-existent ACL entry",
80 filename);
81 }
82 }
83
84 acl_free(*prev_acl);
85 *prev_acl = acl_new;
86
87 if (carried_error)
88 return (-1);
89
90 return (0);
91 }
92
93 int
remove_by_number(uint entry_number,acl_t * prev_acl,const char * filename)94 remove_by_number(uint entry_number, acl_t *prev_acl, const char *filename)
95 {
96 acl_entry_t entry;
97 acl_t acl_new;
98 acl_tag_t tag;
99 int carried_error, entry_id;
100 uint i;
101
102 carried_error = 0;
103
104 acl_new = acl_dup(*prev_acl);
105 if (acl_new == NULL)
106 err(1, "%s: acl_dup() failed", filename);
107
108 tag = ACL_UNDEFINED_TAG;
109
110 /*
111 * Find out whether we're removing the mask entry,
112 * to behave the same as the routine above.
113 *
114 * XXX: Is this loop actually needed?
115 */
116 entry_id = ACL_FIRST_ENTRY;
117 i = 0;
118 while (acl_get_entry(acl_new, entry_id, &entry) == 1) {
119 entry_id = ACL_NEXT_ENTRY;
120 if (i != entry_number)
121 continue;
122 if (acl_get_tag_type(entry, &tag) == -1)
123 err(1, "%s: acl_get_tag_type() failed", filename);
124 if (tag == ACL_MASK)
125 have_mask = true;
126 }
127
128 if (acl_delete_entry_np(acl_new, entry_number) == -1) {
129 carried_error++;
130 warn("%s: acl_delete_entry_np() failed", filename);
131 }
132
133 acl_free(*prev_acl);
134 *prev_acl = acl_new;
135
136 if (carried_error)
137 return (-1);
138
139 return (0);
140 }
141
142 /*
143 * remove default entries
144 */
145 int
remove_default(acl_t * prev_acl,const char * filename)146 remove_default(acl_t *prev_acl, const char *filename)
147 {
148
149 acl_free(*prev_acl);
150 *prev_acl = acl_init(ACL_MAX_ENTRIES);
151 if (*prev_acl == NULL)
152 err(1, "%s: acl_init() failed", filename);
153
154 return (0);
155 }
156
157 /*
158 * remove extended entries
159 */
160 void
remove_ext(acl_t * prev_acl,const char * filename)161 remove_ext(acl_t *prev_acl, const char *filename)
162 {
163 acl_t acl_new;
164
165 acl_new = acl_strip_np(*prev_acl, !n_flag);
166 if (acl_new == NULL)
167 err(1, "%s: acl_strip_np() failed", filename);
168
169 acl_free(*prev_acl);
170 *prev_acl = acl_new;
171 }
172