main: Add support for CONFIGURATION_DIRECTORY environment variable

When running as a systemd service the CONFIGURATION_DIRECTORY
environment variable maybe set:

https://www.freedesktop.org/software/systemd/man/systemd.exec.html
Signed-off-by: Manika Shrivastava <manika.sh@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>

diff --git a/src/main.c b/src/main.c
index 01ebd6b..47be62d 100755 (executable)
--- a/src/main.c
+++ b/src/main.c
@@ -63,7 +63,7 @@
 
 struct btd_opts btd_opts;
 static GKeyFile *main_conf;
-static char *main_conf_file_path;
+static char main_conf_file_path[PATH_MAX];
 
 static const char *supported_options[] = {
        "Name",
@@ -180,18 +180,41 @@ GKeyFile *btd_get_main_conf(void)
        return main_conf;
 }
 
-static GKeyFile *load_config(const char *file)
+static GKeyFile *load_config(const char *name)
 {
        GError *err = NULL;
        GKeyFile *keyfile;
+       int len;
+
+       if (name)
+               snprintf(main_conf_file_path, PATH_MAX, "%s", name);
+       else {
+               const char *configdir = getenv("CONFIGURATION_DIRECTORY");
+
+               /* Check if running as service */
+               if (configdir) {
+                       /* Check if there multiple paths given */
+                       if (strstr(configdir, ":"))
+                               len = strstr(configdir, ":") - configdir;
+                       else
+                               len = strlen(configdir);
+               } else {
+                       configdir = CONFIGDIR;
+                       len = strlen(configdir);
+               }
+
+               snprintf(main_conf_file_path, PATH_MAX, "%*s/main.conf", len,
+                                                configdir);
+       }
 
        keyfile = g_key_file_new();
 
        g_key_file_set_list_separator(keyfile, ',');
 
-       if (!g_key_file_load_from_file(keyfile, file, 0, &err)) {
+       if (!g_key_file_load_from_file(keyfile, main_conf_file_path, 0, &err)) {
                if (!g_error_matches(err, G_FILE_ERROR, G_FILE_ERROR_NOENT))
-                       error("Parsing %s failed: %s", file, err->message);
+                       error("Parsing %s failed: %s", main_conf_file_path,
+                               err->message);
                g_error_free(err);
                g_key_file_free(keyfile);
                return NULL;
@@ -1230,12 +1253,7 @@ int main(int argc, char *argv[])
 
        mainloop_sd_notify("STATUS=Starting up");
 
-       if (option_configfile)
-               main_conf_file_path = option_configfile;
-       else
-               main_conf_file_path = CONFIGDIR "/main.conf";
-
-       main_conf = load_config(main_conf_file_path);
+       main_conf = load_config(option_configfile);
 
        parse_config(main_conf);