implement XDG basedir subset, which we will use to read user configured browser domains from

git-svn-id: file:///home/lennart/svn/public/avahi/trunk@927 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe

4 files changed, 141 insertions, 2 deletions

diff --git a/avahi-client/Makefile.am b/avahi-client/Makefile.am
index 888b917..463ea39 100644
--- a/avahi-client/Makefile.am
+++ b/avahi-client/Makefile.am
@@ -33,7 +33,8 @@ if ENABLE_TESTS
 
 noinst_PROGRAMS = \
 	client-test \
-	srv-test
+	srv-test \
+	xdg-config-test
 
 endif
 
@@ -44,7 +45,8 @@ libavahi_client_la_SOURCES = \
 	entrygroup.c \
 	browser.c \
 	resolver.c \
-	publish.h lookup.h
+	publish.h lookup.h \
+	xdg-config.c xdg-config.h
 
 libavahi_client_la_CFLAGS = $(AM_CFLAGS) $(DBUS_CFLAGS) -DDBUS_SYSTEM_BUS_DEFAULT_ADDRESS=\"$(DBUS_SYSTEM_BUS_DEFAULT_ADDRESS)\"
 libavahi_client_la_LIBADD = $(AM_LDADD) $(DBUS_LIBS) ../avahi-common/libavahi-common.la ../avahi-common/libdbus-common-pic.la
@@ -58,4 +60,8 @@ srv_test_SOURCES = srv-test.c
 srv_test_CFLAGS = $(AM_CFLAGS) 
 srv_test_LDADD = $(AM_LDADD) libavahi-client.la ../avahi-common/libavahi-common.la 
 
+xdg_config_test_SOURCES = xdg-config-test.c xdg-config.c xdg-config.h
+xdg_config_test_CFLAGS = $(AM_CFLAGS) 
+xdg_config_test_LDADD = $(AM_LDADD)
+
 endif
diff --git a/avahi-client/xdg-config-test.c b/avahi-client/xdg-config-test.c
new file mode 100644
index 0000000..fe267f2
--- /dev/null
+++ b/avahi-client/xdg-config-test.c
@@ -0,0 +1,38 @@
+/* $Id$ */
+
+/***
+  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 <avahi-common/gccmacro.h>
+
+#include "xdg-config.h"
+
+int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char *argv[]) {
+
+    FILE *f;
+
+    f = avahi_xdg_config_open("foo");
+    
+    if (f)
+        fclose(f);
+}
diff --git a/avahi-client/xdg-config.c b/avahi-client/xdg-config.c
new file mode 100644
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;
+}
diff --git a/avahi-client/xdg-config.h b/avahi-client/xdg-config.h
new file mode 100644
index 0000000..88f66a8
--- /dev/null
+++ b/avahi-client/xdg-config.h
@@ -0,0 +1,29 @@
+#ifndef fooxdgconfighfoo
+#define fooxdgconfighfoo
+
+/* $Id$ */
+
+/***
+  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.
+***/
+
+#include <stdio.h>
+
+FILE *avahi_xdg_config_open(const char *filename);
+
+#endif