Add function that reads local installed bundles

This function reads installed bundles from local standard
directory and store them in a list pointer passed as argument, this
function is the base for functionality as listing installed bundles to
user.

Signed-off-by: Mario Alfredo Carrillo Arevalo <mario.alfredo.c.arevalo@intel.com>

include/swupd.h

@@ -310,6 +310,7 @@ extern int remove_bundle(const char *bundle_name);
 extern int list_installable_bundles();
 extern int install_bundles_frontend(char **bundles);
 extern int add_subscriptions(struct list *bundles, struct list **subs, int current_version, struct manifest *mom, int recursion);
+void read_local_bundles(struct list **list_bundles);
 
 /* telemetry.c */
 typedef enum telem_prio_t {

src/bundle.c

@@ -589,3 +589,33 @@ clean_and_exit:
 
 	return ret;
 }
+
+/*
+ * This function will read /usr/share/clear/bundles/
+ * in order to get the bundle names, these will be
+ * saved in a list.
+ */
+void read_local_bundles(struct list **list_bundles)
+{
+	char *path = NULL;
+	DIR *dir;
+	struct dirent *ent;
+
+	string_or_die(&path, "%s/%s", path_prefix, BUNDLES_DIR);
+
+	dir = opendir(path);
+	if (dir) {
+		while ((ent = readdir(dir))) {
+			if ((strcmp(ent->d_name, ".") == 0) ||
+			(strcmp(ent->d_name, "..") == 0)) {
+				continue;
+			}
+
+			*list_bundles = list_append_data(*list_bundles, ent->d_name);
+		}
+
+		closedir(dir);
+	}
+
+	free(path);
+}