From 3b8fd590c84756659d2ecb3e413a3e9afc65678d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Danis?=
 <frederic.danis@linux.intel.com>
Date: Tue, 30 Oct 2012 18:05:25 +0100
Subject: [PATCH] device: Retrieve name from storage

Try to retrieve name from device info file.
If that fails fall back to the cache and save it to device info file.

When device name is updated, save it.
---
 src/device.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 101 insertions(+), 1 deletion(-)

diff --git a/src/device.c b/src/device.c
index bc7f8dd9c..9749bfd97 100644
--- a/src/device.c
+++ b/src/device.c
@@ -76,6 +76,9 @@
 #define DISCONNECT_TIMER	2
 #define DISCOVERY_TIMER		2
 
+#define INFO_PATH STORAGEDIR "/%s/%s/info"
+#define CACHE_PATH STORAGEDIR "/%s/cache/%s"
+
 struct btd_disconnect_data {
 	guint id;
 	disconnect_watch watch;
@@ -202,6 +205,36 @@ static uint16_t uuid_list[] = {
 	0
 };
 
+static void store_device_info(struct btd_device *device)
+{
+	GKeyFile *key_file;
+	char filename[PATH_MAX + 1];
+	char adapter_addr[18];
+	char device_addr[18];
+	char *str;
+	gsize length = 0;
+
+	if (device->temporary)
+		return;
+
+	key_file = g_key_file_new();
+
+	g_key_file_set_string(key_file, "General", "Name", device->name);
+
+	ba2str(adapter_get_address(device->adapter), adapter_addr);
+	ba2str(&device->bdaddr, device_addr);
+	snprintf(filename, PATH_MAX, INFO_PATH, adapter_addr, device_addr);
+	filename[PATH_MAX] = '\0';
+
+	create_file(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+
+	str = g_key_file_to_data(key_file, &length, NULL);
+	g_file_set_contents(filename, str, length, NULL);
+	g_free(str);
+
+	g_key_file_free(key_file);
+}
+
 static void browse_request_free(struct browse_req *req)
 {
 	if (req->listener_id)
@@ -1564,6 +1597,70 @@ static void device_set_version(struct btd_device *device, uint16_t value)
 						DEVICE_INTERFACE, "Version");
 }
 
+static char *load_cached_name(struct btd_device *device, const char *local,
+				const gchar *peer)
+{
+	char filename[PATH_MAX + 1];
+	GKeyFile *key_file;
+	char *str = NULL;
+	int len;
+
+	snprintf(filename, PATH_MAX, CACHE_PATH, local, peer);
+	filename[PATH_MAX] = '\0';
+
+	key_file = g_key_file_new();
+
+	if (!g_key_file_load_from_file(key_file, filename, 0, NULL))
+		goto failed;
+
+	str = g_key_file_get_string(key_file, "General", "Name", NULL);
+	if (str) {
+		len = strlen(str);
+		if (len > HCI_MAX_NAME_LENGTH)
+			str[HCI_MAX_NAME_LENGTH] = '\0';
+	}
+
+failed:
+	g_key_file_free(key_file);
+
+	return str;
+}
+
+static void load_info(struct btd_device *device, const gchar *local,
+			const gchar *peer)
+{
+	char filename[PATH_MAX + 1];
+	GKeyFile *key_file;
+	char *str;
+	gboolean store_needed = FALSE;
+
+	snprintf(filename, PATH_MAX, INFO_PATH, local, peer);
+	filename[PATH_MAX] = '\0';
+
+	key_file = g_key_file_new();
+	g_key_file_load_from_file(key_file, filename, 0, NULL);
+
+	/* Load device name from storage info file, if that fails fall back to
+	 * the cache.
+	 */
+	str = g_key_file_get_string(key_file, "General", "Name", NULL);
+	if (str == NULL) {
+		str = load_cached_name(device, local, peer);
+		if (str)
+			store_needed = TRUE;
+	}
+
+	if (str) {
+		strcpy(device->name, str);
+		g_free(str);
+	}
+
+	if (store_needed)
+		store_device_info(device);
+
+	g_key_file_free(key_file);
+}
+
 struct btd_device *device_create(struct btd_adapter *adapter,
 				const gchar *address, uint8_t bdaddr_type)
 {
@@ -1600,7 +1697,8 @@ struct btd_device *device_create(struct btd_adapter *adapter,
 	src = adapter_get_address(adapter);
 	ba2str(src, srcaddr);
 
-	read_device_name(srcaddr, address, bdaddr_type, device->name);
+	load_info(device, srcaddr, address);
+
 	if (read_device_alias(srcaddr, address, bdaddr_type, alias,
 							sizeof(alias)) == 0)
 		device->alias = g_strdup(alias);
@@ -1640,6 +1738,8 @@ void device_set_name(struct btd_device *device, const char *name)
 
 	strncpy(device->name, name, MAX_NAME_LENGTH);
 
+	store_device_info(device);
+
 	g_dbus_emit_property_changed(btd_get_dbus_connection(), device->path,
 						DEVICE_INTERFACE, "Name");
 
-- 
2.47.3