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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
478c8269 | 6 | Copyright 2011,2013 Lennart Poettering |
f4b47811 LP |
7 | |
8 | systemd is free software; you can redistribute it and/or modify it | |
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9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
f4b47811 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
f4b47811 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
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19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <assert.h> | |
23 | #include <sys/acl.h> | |
24 | #include <acl/libacl.h> | |
25 | #include <errno.h> | |
26 | #include <stdbool.h> | |
27 | ||
79c07722 | 28 | #include "acl-util.h" |
478c8269 ZJS |
29 | #include "util.h" |
30 | #include "strv.h" | |
f4b47811 LP |
31 | |
32 | int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) { | |
33 | acl_entry_t i; | |
34 | int found; | |
35 | ||
36 | assert(acl); | |
37 | assert(entry); | |
38 | ||
39 | for (found = acl_get_entry(acl, ACL_FIRST_ENTRY, &i); | |
40 | found > 0; | |
41 | found = acl_get_entry(acl, ACL_NEXT_ENTRY, &i)) { | |
42 | ||
43 | acl_tag_t tag; | |
44 | uid_t *u; | |
45 | bool b; | |
46 | ||
47 | if (acl_get_tag_type(i, &tag) < 0) | |
48 | return -errno; | |
49 | ||
50 | if (tag != ACL_USER) | |
51 | continue; | |
52 | ||
53 | u = acl_get_qualifier(i); | |
54 | if (!u) | |
55 | return -errno; | |
56 | ||
57 | b = *u == uid; | |
58 | acl_free(u); | |
59 | ||
60 | if (b) { | |
61 | *entry = i; | |
62 | return 1; | |
63 | } | |
64 | } | |
65 | ||
66 | if (found < 0) | |
67 | return -errno; | |
68 | ||
69 | return 0; | |
70 | } | |
478c8269 | 71 | |
23ad4dd8 JAS |
72 | int calc_acl_mask_if_needed(acl_t *acl_p) { |
73 | acl_entry_t i; | |
74 | int found; | |
75 | ||
76 | assert(acl_p); | |
77 | ||
78 | for (found = acl_get_entry(*acl_p, ACL_FIRST_ENTRY, &i); | |
79 | found > 0; | |
80 | found = acl_get_entry(*acl_p, ACL_NEXT_ENTRY, &i)) { | |
81 | ||
82 | acl_tag_t tag; | |
83 | ||
84 | if (acl_get_tag_type(i, &tag) < 0) | |
85 | return -errno; | |
86 | ||
87 | if (tag == ACL_MASK) | |
88 | return 0; | |
89 | } | |
90 | ||
91 | if (found < 0) | |
92 | return -errno; | |
93 | ||
94 | if (acl_calc_mask(acl_p) < 0) | |
95 | return -errno; | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
478c8269 ZJS |
100 | int search_acl_groups(char*** dst, const char* path, bool* belong) { |
101 | acl_t acl; | |
102 | ||
103 | assert(path); | |
104 | assert(belong); | |
105 | ||
106 | acl = acl_get_file(path, ACL_TYPE_DEFAULT); | |
107 | if (acl) { | |
108 | acl_entry_t entry; | |
109 | int r; | |
110 | ||
111 | r = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry); | |
112 | while (r > 0) { | |
113 | acl_tag_t tag; | |
114 | gid_t *gid; | |
115 | char *name; | |
116 | ||
117 | r = acl_get_tag_type(entry, &tag); | |
118 | if (r < 0) | |
119 | break; | |
120 | ||
121 | if (tag != ACL_GROUP) | |
122 | goto next; | |
123 | ||
124 | gid = acl_get_qualifier(entry); | |
125 | if (!gid) | |
126 | break; | |
127 | ||
128 | if (in_gid(*gid) > 0) { | |
129 | *belong = true; | |
130 | break; | |
131 | } | |
132 | ||
133 | name = gid_to_name(*gid); | |
134 | if (!name) { | |
135 | acl_free(acl); | |
136 | return log_oom(); | |
137 | } | |
138 | ||
6e18964d | 139 | r = strv_consume(dst, name); |
478c8269 | 140 | if (r < 0) { |
478c8269 ZJS |
141 | acl_free(acl); |
142 | return log_oom(); | |
143 | } | |
144 | ||
145 | next: | |
146 | r = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry); | |
147 | } | |
148 | ||
149 | acl_free(acl); | |
150 | } | |
151 | ||
152 | return 0; | |
153 | } |