1 /*
2 * ProFTPD - FTP server daemon
3 * Copyright (c) 2001-2016 The ProFTPD Project team
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
18 *
19 * As a special exemption, The ProFTPD Project team and other respective
20 * copyright holders give permission to link this program with OpenSSL, and
21 * distribute the resulting executable, without including the source code for
22 * OpenSSL in the source distribution.
23 */
24
25 /* Feature management code */
26
27 #include "conf.h"
28
29 static pool *feat_pool = NULL;
30 static pr_table_t *feat_tab = NULL;
31
pr_feat_add(const char * feat)32 int pr_feat_add(const char *feat) {
33 if (feat == NULL) {
34 errno = EINVAL;
35 return -1;
36 }
37
38 /* If no feature-tracking list has been allocated, create one. */
39 if (feat_pool == NULL) {
40 feat_pool = make_sub_pool(permanent_pool);
41 pr_pool_tag(feat_pool, "Feat API");
42 feat_tab = pr_table_alloc(feat_pool, 0);
43 }
44
45 /* Make sure that the feature being added isn't already in the list. */
46 if (pr_table_exists(feat_tab, feat) > 0) {
47 errno = EEXIST;
48 return -1;
49 }
50
51 return pr_table_add(feat_tab, pstrdup(feat_pool, feat), "", 0);
52 }
53
pr_feat_remove(const char * feat)54 int pr_feat_remove(const char *feat) {
55 const void *res;
56
57 if (feat_tab == NULL) {
58 errno = EPERM;
59 return -1;
60 }
61
62 if (feat == NULL) {
63 errno = EINVAL;
64 return -1;
65 }
66
67 res = pr_table_remove(feat_tab, feat, NULL);
68 if (res != NULL) {
69 return 0;
70 }
71
72 errno = ENOENT;
73 return -1;
74 }
75
pr_feat_get(void)76 const char *pr_feat_get(void) {
77 if (feat_tab == NULL) {
78 errno = EPERM;
79 return NULL;
80 }
81
82 (void) pr_table_rewind(feat_tab);
83 return pr_table_next(feat_tab);
84 }
85
pr_feat_get_next(void)86 const char *pr_feat_get_next(void) {
87 if (feat_tab == NULL) {
88 errno = EPERM;
89 return NULL;
90 }
91
92 return pr_table_next(feat_tab);
93 }
94