1/* $Id$ */
2
3/***
4  This file is part of avahi.
5
6  avahi is free software; you can redistribute it and/or modify it
7  under the terms of the GNU Lesser General Public License as
8  published by the Free Software Foundation; either version 2.1 of the
9  License, or (at your option) any later version.
10
11  avahi is distributed in the hope that it will be useful, but WITHOUT
12  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14  Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public
17  License along with avahi; if not, write to the Free Software
18  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19  USA.
20***/
21
22#ifdef HAVE_CONFIG_H
23#include <config.h>
24#endif
25
26#include <assert.h>
27#include <limits.h>
28#include <stdlib.h>
29#include <errno.h>
30#include <string.h>
31
32#include "xdg-config.h"
33
34#ifndef PATH_MAX
35#define PATH_MAX 4096
36#endif
37
38FILE *avahi_xdg_config_open(const char *filename) {
39    FILE *f;
40    const char *e, *d;
41    char fn[PATH_MAX], *p = NULL, buf[2048], *s = NULL;
42
43    assert(filename);
44
45    if ((e = getenv("XDG_CONFIG_HOME")) && *e)
46        snprintf(p = fn, sizeof(fn), "%s/%s", e, filename);
47    else if ((e = getenv("HOME")) && *e)
48        snprintf(p = fn, sizeof(fn), "%s/.config/%s", e, filename);
49
50    if (p) {
51        if ((f = fopen(p, "r")))
52            return f;
53        else if (errno != ENOENT)
54            return NULL;
55    }
56
57    if (!(d = getenv("XDG_CONFIG_DIRS")) || !*d)
58        d = "/etc/xdg";
59
60    snprintf(buf, sizeof(buf), "%s", d);
61
62    for (e = strtok_r(buf, ":", &s); e; e = strtok_r(NULL, ":", &s)) {
63        snprintf(fn, sizeof(fn), "%s/%s", e, filename);
64
65        if ((f = fopen(fn, "r")))
66            return f;
67    }
68
69    return NULL;
70}
71