1 /***
2 This file is part of avahi.
3
4 avahi is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
8
9 avahi is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12 Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with avahi; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17 USA.
18 ***/
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <assert.h>
25 #include <limits.h>
26 #include <stdlib.h>
27 #include <errno.h>
28 #include <string.h>
29
30 #include "xdg-config.h"
31
32 #ifndef PATH_MAX
33 #define PATH_MAX 4096
34 #endif
35
avahi_xdg_config_open(const char * filename)36 FILE *avahi_xdg_config_open(const char *filename) {
37 FILE *f;
38 const char *e, *d;
39 char fn[PATH_MAX], *p = NULL, buf[2048], *s = NULL;
40
41 assert(filename);
42
43 if ((e = getenv("XDG_CONFIG_HOME")) && *e)
44 snprintf(p = fn, sizeof(fn), "%s/%s", e, filename);
45 else if ((e = getenv("HOME")) && *e)
46 snprintf(p = fn, sizeof(fn), "%s/.config/%s", e, filename);
47
48 if (p) {
49 if ((f = fopen(p, "r")))
50 return f;
51 else if (errno != ENOENT)
52 return NULL;
53 }
54
55 if (!(d = getenv("XDG_CONFIG_DIRS")) || !*d)
56 d = "/etc/xdg";
57
58 snprintf(buf, sizeof(buf), "%s", d);
59
60 for (e = strtok_r(buf, ":", &s); e; e = strtok_r(NULL, ":", &s)) {
61 snprintf(fn, sizeof(fn), "%s/%s", e, filename);
62
63 if ((f = fopen(fn, "r")))
64 return f;
65 }
66
67 return NULL;
68 }
69