[phodav PATCH 3/3 v5] spice-webdavd-windows: Dismount shared folder on service stop

[Lukas Venhoda <lvenhoda@xxxxxxxxxx>]

When stopping the service, automatically disconnect shared folder on
windows. Not dismounting could lead to multiple shared folders.
---
Changes since v4:
 - Dont lookup drive letter when unmapping
    - Uses a service_data structure and map_drive_data structure to store
      the drive_letter for later use while unmapping
 - Better debug messages

Changes since v3:
 - Better handeling of string names
 - Syntax cleanup
 - Remove global variable drive_letter
    - Now scans for mapped drive and unmaps it

Changes since v2:
 - None

Changes since v1:
 - New patch
---
 spice/spice-webdavd.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 46 insertions(+), 4 deletions(-)

diff --git a/spice/spice-webdavd.c b/spice/spice-webdavd.c
index 571600e..1ccb249 100644
--- a/spice/spice-webdavd.c
+++ b/spice/spice-webdavd.c
@@ -749,6 +749,7 @@ typedef enum _MapDriveEnum

 typedef struct _MapDriveData
 {
+  gchar * drive_letter;
   GCancellable * cancel_map;
 } MapDriveData;

@@ -851,6 +852,26 @@ map_drive(const gchar drive_letter)
 }

 static void
+unmap_drive(const gchar drive_letter)
+{
+  gchar local_name[MAX_DRIVE_LETTER_SIZE];
+  guint32 errn;
+
+  g_snprintf(local_name, MAX_DRIVE_LETTER_SIZE, "%c:", drive_letter);
+  errn = WNetCancelConnection2(local_name, CONNECT_UPDATE_PROFILE, TRUE);
+
+  if (errn == NO_ERROR) {
+    g_debug ("Shared folder unmapped succesfully");
+  } else if (errn == ERROR_NOT_CONNECTED) {
+    g_debug ("Drive %c is not connected", drive_letter);
+  } else {
+    g_warning ("map_drive error %d", errn);
+  }
+
+  return;
+}
+
+static void
 map_drive_cb(GTask *task,
              gpointer source_object,
              gpointer task_data,
@@ -888,12 +909,21 @@ map_drive_cb(GTask *task,
   //TODO: After mapping, rename network drive from \\localhost@PORT\DavWWWRoot
   //      to something like SPICE Shared Folder
   }
+
+  *(map_drive_data->drive_letter) = drive_letter;
   return;
 }
+
+typedef struct _ServiceData
+{
+  gchar drive_letter;
+} ServiceData;
+
 #endif

+//Parameter service_data is only used on windows when started as a service
 static void
-run_service (void)
+run_service (ServiceData * service_data G_GNUC_UNUSED)
 {
   g_debug ("Run service");

@@ -902,6 +932,13 @@ run_service (void)
   map_drive_data.cancel_map = g_cancellable_new ();
   gchar drive_letter = get_spice_folder_letter ();

+  if (service_data != NULL) {
+    service_data->drive_letter = drive_letter;
+    map_drive_data.drive_letter = &(service_data->drive_letter);
+  } else {
+    map_drive_data.drive_letter = &(drive_letter);
+  }
+
   if (drive_letter == 0)
   {
     GTask * map_drive_task = g_task_new (NULL, NULL, NULL, NULL);
@@ -983,10 +1020,13 @@ service_ctrl_handler (DWORD ctrl, DWORD type, LPVOID data, LPVOID ctx)
 {
   DWORD ret = NO_ERROR;

+  ServiceData * service_data = ctx;
+
   switch (ctrl)
     {
     case SERVICE_CONTROL_STOP:
     case SERVICE_CONTROL_SHUTDOWN:
+        unmap_drive (service_data->drive_letter);
         quit (SIGTERM);
         service_status.dwCurrentState = SERVICE_STOP_PENDING;
         SetServiceStatus (service_status_handle, &service_status);
@@ -1002,8 +1042,10 @@ service_ctrl_handler (DWORD ctrl, DWORD type, LPVOID data, LPVOID ctx)
 VOID WINAPI
 service_main (DWORD argc, TCHAR *argv[])
 {
+  ServiceData service_data;
+
   service_status_handle =
-    RegisterServiceCtrlHandlerEx ("spice-webdavd", service_ctrl_handler, NULL);
+    RegisterServiceCtrlHandlerEx ("spice-webdavd", service_ctrl_handler, &service_data);

   g_return_if_fail (service_status_handle != 0);

@@ -1017,7 +1059,7 @@ service_main (DWORD argc, TCHAR *argv[])
   SetServiceStatus (service_status_handle, &service_status);

   while (!quit_service) {
-      run_service ();
+      run_service (&service_data);
       g_usleep (G_USEC_PER_SEC);
   }

@@ -1103,7 +1145,7 @@ main (int argc, char *argv[])
     } else
 #endif
   while (!quit_service) {
-    run_service ();
+    run_service (NULL);
     g_usleep (G_USEC_PER_SEC);
   }

--
2.5.5

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