[Spice-devel] [phodav PATCH 2/3 v5] spice-webdavd-windows: Check for mapped shared folder

[Lukas Venhoda]

Check whether Spice Folder is already mapped.
If yes, don't try to map another one.
---
Changes since v4:
 - Moved some variables around
 - Better debug message
 - Fixed bug, that would cause the folder not to mount automatically

Changes since v3:
 - changed function is_spice_folder_mapped to get_spice_folder_letter
    - Now returns the mapped folder drive letter
    - This can be used to call unmap_drive
    - No need for global variable drive_letter
 - Better handeling of adress string
    - No hardcoded port
 - Syntax cleanup

Changes since v2:
 - New patch
---
 spice/spice-webdavd.c | 49 +++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 45 insertions(+), 4 deletions(-)

diff --git a/spice/spice-webdavd.c b/spice/spice-webdavd.c
index 6c2e53f..571600e 100644
--- a/spice/spice-webdavd.c
+++ b/spice/spice-webdavd.c
@@ -775,6 +775,42 @@ get_free_drive_letter(void)
   return 0;
 }

+static gchar
+get_spice_folder_letter(void)
+{
+  const guint32 max_mask = 1 << 25;
+  gchar local_name[MAX_DRIVE_LETTER_SIZE] = "z:";
+  gchar * spice_folder_name;
+  gchar spice_folder_letter = 0;
+  guint32 drives;
+  guint32 i;
+
+  drives = GetLogicalDrives ();
+  spice_folder_name = g_strdup_printf("\\\\localhost@%d\\DavWWWRoot", port);
+
+  for (i = 0; i < 26; i++)
+  {
+    gchar remote_name[MAX_SHARED_FOLDER_NAME_SIZE];
+    guint32 size = sizeof(remote_name);
+    guint32 mask = max_mask >> i;
+    if (drives & mask)
+    {
+      local_name[0] = 'z' - i;
+      if ((WNetGetConnection (local_name, remote_name, (LPDWORD)&size) == NO_ERROR) &&
+          (g_strcmp0 (remote_name, spice_folder_name) == 0))
+      {
+        spice_folder_letter = local_name[0];
+        g_debug ("Found Spice Shared Folder at %c drive", spice_folder_letter);
+        break;
+      }
+    }
+  }
+
+  g_free(spice_folder_name);
+
+  return spice_folder_letter;
+}
+
 /* User is required to call netresource_free, when no longer needed. */
 static void
 netresource_init(NETRESOURCE * net_resource, const gchar drive_letter)
@@ -864,10 +900,15 @@ run_service (void)
 #ifdef G_OS_WIN32
   MapDriveData map_drive_data;
   map_drive_data.cancel_map = g_cancellable_new ();
-  GTask * map_drive_task = g_task_new (NULL, NULL, NULL, NULL);
-  g_task_set_task_data (map_drive_task, &map_drive_data, NULL);
-  g_task_run_in_thread (map_drive_task, map_drive_cb);
-  g_object_unref (map_drive_task);
+  gchar drive_letter = get_spice_folder_letter ();
+
+  if (drive_letter == 0)
+  {
+    GTask * map_drive_task = g_task_new (NULL, NULL, NULL, NULL);
+    g_task_set_task_data (map_drive_task, &map_drive_data, NULL);
+    g_task_run_in_thread (map_drive_task, map_drive_cb);
+    g_object_unref (map_drive_task);
+  }
 #endif

   g_socket_service_start (socket_service);
--
2.5.5