1 /*
2 * libdpkg - Debian packaging suite library routines
3 * dbdir.c - on-disk database directory functions
4 *
5 * Copyright © 2011 Guillem Jover <guillem@debian.org>
6 *
7 * This is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
19 */
20
21 #include <config.h>
22 #include <compat.h>
23
24 #include <sys/types.h>
25
26 #include <stdlib.h>
27
28 #include <dpkg/dpkg.h>
29 #include <dpkg/dpkg-db.h>
30
31 static const char *db_dir = ADMINDIR;
32
33 /**
34 * Set current on-disk database directory.
35 *
36 * The directory is initially set to ADMINDIR, this function can be used to
37 * set the directory to a new value, or to set it to a default value if dir
38 * is NULL. For the latter the order is, value from environment variable
39 * DPKG_ADMINDIR, and then the built-in default ADMINDIR,
40 *
41 * @param dir The new database directory, or NULL to set to default.
42 *
43 * @return The new database directory.
44 */
45 const char *
dpkg_db_set_dir(const char * dir)46 dpkg_db_set_dir(const char *dir)
47 {
48 if (dir == NULL) {
49 const char *env;
50
51 env = getenv("DPKG_ADMINDIR");
52 if (env)
53 db_dir = env;
54 else
55 db_dir = ADMINDIR;
56 } else {
57 db_dir = dir;
58 }
59
60 return db_dir;
61 }
62
63 /**
64 * Get current on-disk database directory.
65 *
66 * @return The current database directory.
67 */
68 const char *
dpkg_db_get_dir(void)69 dpkg_db_get_dir(void)
70 {
71 return db_dir;
72 }
73
74 /**
75 * Get a pathname to the current on-disk database directory.
76 *
77 * This function returns an allocated string, which should be freed with
78 * free(2).
79 *
80 * @param pathpart The pathpart to append to the new pathname.
81 *
82 * @return The newly allocated pathname.
83 */
84 char *
dpkg_db_get_path(const char * pathpart)85 dpkg_db_get_path(const char *pathpart)
86 {
87 return str_fmt("%s/%s", db_dir, pathpart);
88 }
89