gio/gwin32volumemonitor.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright (C) 2006-2007 Red Hat, Inc.
   4  * Copyright (C) 2008 Hans Breuer
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  * Author: Alexander Larsson <alexl@redhat.com>
  22  *         David Zeuthen <davidz@redhat.com>
  23  *         Hans Breuer <hans@breuer.org>
  24  */
  25
  26 #include "config.h"
  27
  28 #include <string.h>
  29
  30 #include <glib.h>
  31 #include "glibintl.h"
  32
  33 #include "gwin32volumemonitor.h"
  34 #include "gwin32mount.h"
  35 #include "gmount.h"
  36 #include "giomodule.h"
  37 #include "gioalias.h"
  38
  39 #define _WIN32_WINNT 0x0500
  40 #include <windows.h>
  41
  42 struct _GWin32VolumeMonitor {
  43   GNativeVolumeMonitor parent;
  44
  45   GList *volumes;
  46   GList *mounts;
  47 };
  48
  49 #define g_win32_volume_monitor_get_type _g_win32_volume_monitor_get_type
  50 G_DEFINE_TYPE_WITH_CODE (GWin32VolumeMonitor, g_win32_volume_monitor, G_TYPE_NATIVE_VOLUME_MONITOR,
  51                          g_io_extension_point_implement (G_NATIVE_VOLUME_MONITOR_EXTENSION_POINT_NAME,
  52                                                          g_define_type_id,
  53                                                          "win32",
  54                                                          0));
  55
  56 static void
  57 g_win32_volume_monitor_finalize (GObject *object)
  58 {
  59   GWin32VolumeMonitor *monitor;
  60
  61   monitor = G_WIN32_VOLUME_MONITOR (object);
  62
  63   if (G_OBJECT_CLASS (g_win32_volume_monitor_parent_class)->finalize)
  64     (*G_OBJECT_CLASS (g_win32_volume_monitor_parent_class)->finalize) (object);
  65 }
  66
  67 /**
  68  * get_viewable_logical_drives:
  69  *
  70  * Returns the list of logical and viewable drives as defined by
  71  * GetLogicalDrives() and the registry keys
  72  * Software\Microsoft\Windows\CurrentVersion\Policies\Explorer under
  73  * HKLM or HKCU. If neither key exists the result of
  74  * GetLogicalDrives() is returned.
  75  *
  76  * Return value: bitmask with same meaning as returned by GetLogicalDrives()
  77 **/
  78 static guint32
  79 get_viewable_logical_drives (void)
  80 {
  81   guint viewable_drives = GetLogicalDrives ();
  82   HKEY key;
  83
  84   DWORD var_type = REG_DWORD; //the value's a REG_DWORD type
  85   DWORD no_drives_size = 4;
  86   DWORD no_drives;
  87   gboolean hklm_present = FALSE;
  88
  89   if (RegOpenKeyEx (HKEY_LOCAL_MACHINE,
  90                     "Software\\Microsoft\\Windows\\"
  91                     "CurrentVersion\\Policies\\Explorer",
  92                     0, KEY_READ, &key) == ERROR_SUCCESS)
  93     {
  94       if (RegQueryValueEx (key, "NoDrives", NULL, &var_type,
  95                            (LPBYTE) &no_drives, &no_drives_size) == ERROR_SUCCESS)
  96         {
  97           /* We need the bits that are set in viewable_drives, and
  98            * unset in no_drives.
  99            */
 100           viewable_drives = viewable_drives & ~no_drives;
 101           hklm_present = TRUE;
 102         }
 103       RegCloseKey (key);
 104     }
 105
 106   /* If the key is present in HKLM then the one in HKCU should be ignored */
 107   if (!hklm_present)
 108     {
 109       if (RegOpenKeyEx (HKEY_CURRENT_USER,
 110                         "Software\\Microsoft\\Windows\\"
 111                         "CurrentVersion\\Policies\\Explorer",
 112                         0, KEY_READ, &key) == ERROR_SUCCESS)
 113         {
 114           if (RegQueryValueEx (key, "NoDrives", NULL, &var_type,
 115                                (LPBYTE) &no_drives, &no_drives_size) == ERROR_SUCCESS)
 116             {
 117               viewable_drives = viewable_drives & ~no_drives;
 118             }
 119           RegCloseKey (key);
 120         }
 121     }
 122
 123   return viewable_drives;
 124 }
 125
 126 /* deliver accesible (aka 'mounted') volumes */
 127 static GList *
 128 get_mounts (GVolumeMonitor *volume_monitor)
 129 {
 130   GWin32VolumeMonitor *monitor;
 131   DWORD   drives;
 132   gchar   drive[4] = "A:\\";
 133   GList *list = NULL;
 134
 135   monitor = G_WIN32_VOLUME_MONITOR (volume_monitor);
 136
 137   drives = get_viewable_logical_drives ();
 138
 139   if (!drives)
 140     g_warning ("get_viewable_logical_drives failed.");
 141
 142   while (drives && drive[0] <= 'Z')
 143     {
 144       if (drives & 1)
 145       {
 146         list = g_list_prepend (list, _g_win32_mount_new (volume_monitor, drive, NULL));
 147       }
 148       drives >>= 1;
 149       drive[0]++;
 150     }
 151   return list;
 152 }
 153
 154 /* actually 'mounting' volumes is out of GIOs business on win32, so no volumes are delivered either */
 155 static GList *
 156 get_volumes (GVolumeMonitor *volume_monitor)
 157 {
 158   GWin32VolumeMonitor *monitor;
 159   GList *l = NULL;
 160
 161   monitor = G_WIN32_VOLUME_MONITOR (volume_monitor);
 162
 163   return l;
 164 }
 165
 166 /* real hardware */
 167 static GList *
 168 get_connected_drives (GVolumeMonitor *volume_monitor)
 169 {
 170   GWin32VolumeMonitor *monitor;
 171   HANDLE  find_handle;
 172   BOOL    found;
 173   wchar_t wc_name[MAX_PATH+1];
 174   GList *list = NULL;
 175
 176   monitor = G_WIN32_VOLUME_MONITOR (volume_monitor);
 177
 178   find_handle = FindFirstVolumeW (wc_name, MAX_PATH);
 179   found = (find_handle != INVALID_HANDLE_VALUE);
 180   while (found)
 181     {
 182       wchar_t wc_dev_name[MAX_PATH+1];
 183       guint trailing = wcslen(wc_name) - 1;
 184
 185       /* remove trailing backslash and leading \\?\\ */
 186       wc_name[trailing] = L'\0';
 187       if (QueryDosDeviceW(&wc_name[4], wc_dev_name, MAX_PATH))
 188         {
 189           gchar *name = g_utf16_to_utf8 (wc_dev_name, -1, NULL, NULL, NULL);
 190           g_print ("%s\n", name);
 191           g_free (name);
 192         }
 193
 194       found = FindNextVolumeW (find_handle, wc_name, MAX_PATH);
 195     }
 196   if (find_handle != INVALID_HANDLE_VALUE)
 197     FindVolumeClose (find_handle);
 198
 199   return list;
 200 }
 201
 202 static GVolume *
 203 get_volume_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
 204 {
 205   return NULL;
 206 }
 207
 208 static GMount *
 209 get_mount_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
 210 {
 211   return NULL;
 212 }
 213
 214 static gboolean
 215 is_supported (void)
 216 {
 217   return TRUE;
 218 }
 219
 220 static GMount *
 221 get_mount_for_mount_path (const char *mount_path,
 222                           GCancellable *cancellable)
 223 {
 224   GWin32Mount *mount;
 225
 226   /* TODO: Set mountable volume? */
 227   mount = _g_win32_mount_new (NULL, mount_path, NULL);
 228
 229   return G_MOUNT (mount);
 230 }
 231
 232 static void
 233 g_win32_volume_monitor_class_init (GWin32VolumeMonitorClass *klass)
 234 {
 235   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 236   GVolumeMonitorClass *monitor_class = G_VOLUME_MONITOR_CLASS (klass);
 237   GNativeVolumeMonitorClass *native_class = G_NATIVE_VOLUME_MONITOR_CLASS (klass);
 238
 239   gobject_class->finalize = g_win32_volume_monitor_finalize;
 240
 241   monitor_class->get_mounts = get_mounts;
 242   monitor_class->get_volumes = get_volumes;
 243   monitor_class->get_connected_drives = get_connected_drives;
 244   monitor_class->get_volume_for_uuid = get_volume_for_uuid;
 245   monitor_class->get_mount_for_uuid = get_mount_for_uuid;
 246   monitor_class->is_supported = is_supported;
 247
 248   native_class->get_mount_for_mount_path = get_mount_for_mount_path;
 249 }
 250
 251 static void
 252 g_win32_volume_monitor_init (GWin32VolumeMonitor *win32_monitor)
 253 {
 254   /* maybe we shoud setup a callback window to listern for WM_DEVICECHANGE ? */
 255 #if 0
 256   unix_monitor->mount_monitor = g_win32_mount_monitor_new ();
 257
 258   g_signal_connect (win32_monitor->mount_monitor,
 259                     "mounts_changed", G_CALLBACK (mounts_changed),
 260                     win32_monitor);
 261
 262   g_signal_connect (win32_monitor->mount_monitor,
 263                     "mountpoints_changed", G_CALLBACK (mountpoints_changed),
 264                     win32_monitor);
 265
 266   update_volumes (win32_monitor);
 267   update_mounts (win32_monitor);
 268 #endif
 269 }