implement XDG basedir subset, which we will use to read user configured browser domai...

[catta] / avahi-client / xdg-config.c

diff --git a/avahi-client/xdg-config.c b/avahi-client/xdg-config.c
new file mode 100644 (file)
index 0000000..ea4bb98
--- /dev/null
+++ b/avahi-client/xdg-config.c
@@ -0,0 +1,66 @@
+/* $Id$ */
+
+/***
+  This file is part of avahi.
+ 
+  avahi is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+ 
+  avahi is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
+  Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public
+  License along with avahi; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+
+#include "xdg-config.h"
+
+FILE *avahi_xdg_config_open(const char *filename) {
+    FILE *f;
+    const char *e, *d;
+    char fn[PATH_MAX], *p = NULL, buf[2048], *s = NULL;
+
+    assert(filename);
+    
+    if ((e = getenv("XDG_CONFIG_HOME")) && *e)
+        snprintf(p = fn, sizeof(fn), "%s/%s", e, filename);
+    else if ((e = getenv("HOME")) && *e)
+        snprintf(p = fn, sizeof(fn), "%s/.config/%s", e, filename);
+    
+    if (p) {
+        if ((f = fopen(p, "r")))
+            return f;
+        else if (errno != ENOENT)
+            return NULL;
+    }
+
+    if (!(d = getenv("XDG_CONFIG_DIRS")) || !*d)
+        d = "/etc/xdg";
+
+    snprintf(buf, sizeof(buf), "%s", d);
+
+    for (e = strtok_r(buf, ":", &s); e; e = strtok_r(NULL, ":", &s)) {
+        snprintf(fn, sizeof(fn), "%s/%s", e, filename);
+
+        if ((f = fopen(fn, "r")))
+            return f;
+    }
+
+    return NULL;
+}