dlls/mountmgr.sys/hal.c

   1 /*
   2  * HAL devices support
   3  *
   4  * Copyright 2006 Alexandre Julliard
   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 2.1 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 Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <errno.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <sys/time.h>
  29 #ifdef SONAME_LIBHAL
  30 # include <dbus/dbus.h>
  31 # include <hal/libhal.h>
  32 #endif
  33
  34 #include "mountmgr.h"
  35 #include "winnls.h"
  36 #include "excpt.h"
  37
  38 #include "wine/library.h"
  39 #include "wine/exception.h"
  40 #include "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(mountmgr);
  43
  44 #ifdef SONAME_LIBHAL
  45
  46 #define DBUS_FUNCS \
  47     DO_FUNC(dbus_bus_get); \
  48     DO_FUNC(dbus_connection_close); \
  49     DO_FUNC(dbus_connection_read_write_dispatch); \
  50     DO_FUNC(dbus_error_init); \
  51     DO_FUNC(dbus_error_free); \
  52     DO_FUNC(dbus_error_is_set)
  53
  54 #define HAL_FUNCS \
  55     DO_FUNC(libhal_ctx_free); \
  56     DO_FUNC(libhal_ctx_init); \
  57     DO_FUNC(libhal_ctx_new); \
  58     DO_FUNC(libhal_ctx_set_dbus_connection); \
  59     DO_FUNC(libhal_ctx_set_device_added); \
  60     DO_FUNC(libhal_ctx_set_device_property_modified); \
  61     DO_FUNC(libhal_ctx_set_device_removed); \
  62     DO_FUNC(libhal_ctx_shutdown); \
  63     DO_FUNC(libhal_device_get_property_bool); \
  64     DO_FUNC(libhal_device_get_property_string); \
  65     DO_FUNC(libhal_device_add_property_watch); \
  66     DO_FUNC(libhal_device_remove_property_watch); \
  67     DO_FUNC(libhal_free_string); \
  68     DO_FUNC(libhal_free_string_array); \
  69     DO_FUNC(libhal_get_all_devices)
  70
  71 #define DO_FUNC(f) static typeof(f) * p_##f
  72 DBUS_FUNCS;
  73 HAL_FUNCS;
  74 #undef DO_FUNC
  75
  76 static BOOL load_functions(void)
  77 {
  78     void *hal_handle;
  79     char error[128];
  80
  81     /* Load libhal with RTLD_GLOBAL so that the dbus symbols are available.
  82      * We can't load libdbus directly since libhal may have been built against a
  83      * different version but with the same soname. Binary compatibility is for wimps. */
  84
  85     if (!(hal_handle = wine_dlopen(SONAME_LIBHAL, RTLD_NOW|RTLD_GLOBAL, error, sizeof(error))))
  86         goto failed;
  87
  88 #define DO_FUNC(f) if (!(p_##f = wine_dlsym( RTLD_DEFAULT, #f, error, sizeof(error) ))) goto failed
  89     DBUS_FUNCS;
  90 #undef DO_FUNC
  91
  92 #define DO_FUNC(f) if (!(p_##f = wine_dlsym( hal_handle, #f, error, sizeof(error) ))) goto failed
  93     HAL_FUNCS;
  94 #undef DO_FUNC
  95
  96     return TRUE;
  97
  98 failed:
  99     WARN( "failed to load HAL support: %s\n", error );
 100     return FALSE;
 101 }
 102
 103 static LONG WINAPI assert_fault(EXCEPTION_POINTERS *eptr)
 104 {
 105     if (eptr->ExceptionRecord->ExceptionCode == EXCEPTION_WINE_ASSERTION)
 106         return EXCEPTION_EXECUTE_HANDLER;
 107     return EXCEPTION_CONTINUE_SEARCH;
 108 }
 109
 110 static GUID *parse_uuid( GUID *guid, const char *str )
 111 {
 112     /* standard uuid format */
 113     if (strlen(str) == 36)
 114     {
 115         UNICODE_STRING strW;
 116         WCHAR buffer[39];
 117
 118         if (MultiByteToWideChar( CP_UNIXCP, 0, str, 36, buffer + 1, 36 ))
 119         {
 120             buffer[0] = '{';
 121             buffer[37] = '}';
 122             buffer[38] = 0;
 123             RtlInitUnicodeString( &strW, buffer );
 124             if (!RtlGUIDFromString( &strW, guid )) return guid;
 125         }
 126     }
 127
 128     /* check for xxxx-xxxx format (FAT serial number) */
 129     if (strlen(str) == 9 && str[4] == '-')
 130     {
 131         memset( guid, 0, sizeof(*guid) );
 132         if (sscanf( str, "%hx-%hx", &guid->Data2, &guid->Data3 ) == 2) return guid;
 133     }
 134     return NULL;
 135 }
 136
 137 /* HAL callback for new device */
 138 static void new_device( LibHalContext *ctx, const char *udi )
 139 {
 140     DBusError error;
 141     char *parent = NULL;
 142     char *mount_point = NULL;
 143     char *device = NULL;
 144     char *type = NULL;
 145     char *uuid_str = NULL;
 146     GUID guid, *guid_ptr = NULL;
 147     enum device_type drive_type;
 148
 149     p_dbus_error_init( &error );
 150
 151     if (!(device = p_libhal_device_get_property_string( ctx, udi, "block.device", &error )))
 152         goto done;
 153
 154     if (!(mount_point = p_libhal_device_get_property_string( ctx, udi, "volume.mount_point", &error )))
 155         goto done;
 156
 157     if (!(parent = p_libhal_device_get_property_string( ctx, udi, "info.parent", &error )))
 158         goto done;
 159
 160     if (!(uuid_str = p_libhal_device_get_property_string( ctx, udi, "volume.uuid", &error )))
 161         p_dbus_error_free( &error );  /* ignore error */
 162     else
 163         guid_ptr = parse_uuid( &guid, uuid_str );
 164
 165     if (!(type = p_libhal_device_get_property_string( ctx, parent, "storage.drive_type", &error )))
 166         p_dbus_error_free( &error );  /* ignore error */
 167
 168     if (type && !strcmp( type, "cdrom" )) drive_type = DEVICE_CDROM;
 169     else if (type && !strcmp( type, "floppy" )) drive_type = DEVICE_FLOPPY;
 170     else drive_type = DEVICE_UNKNOWN;
 171
 172     if (p_libhal_device_get_property_bool( ctx, parent, "storage.removable", &error ))
 173     {
 174         add_dos_device( -1, udi, device, mount_point, drive_type, guid_ptr );
 175         /* add property watch for mount point */
 176         p_libhal_device_add_property_watch( ctx, udi, &error );
 177     }
 178     else if (guid_ptr) add_volume( udi, device, mount_point, DEVICE_HARDDISK_VOL, guid_ptr );
 179
 180 done:
 181     if (type) p_libhal_free_string( type );
 182     if (parent) p_libhal_free_string( parent );
 183     if (device) p_libhal_free_string( device );
 184     if (uuid_str) p_libhal_free_string( uuid_str );
 185     if (mount_point) p_libhal_free_string( mount_point );
 186     p_dbus_error_free( &error );
 187 }
 188
 189 /* HAL callback for removed device */
 190 static void removed_device( LibHalContext *ctx, const char *udi )
 191 {
 192     DBusError error;
 193
 194     TRACE( "removed %s\n", wine_dbgstr_a(udi) );
 195
 196     if (!remove_dos_device( -1, udi ))
 197     {
 198         p_dbus_error_init( &error );
 199         p_libhal_device_remove_property_watch( ctx, udi, &error );
 200         p_dbus_error_free( &error );
 201     }
 202     else remove_volume( udi );
 203 }
 204
 205 /* HAL callback for property changes */
 206 static void property_modified (LibHalContext *ctx, const char *udi,
 207                                const char *key, dbus_bool_t is_removed, dbus_bool_t is_added)
 208 {
 209     TRACE( "udi %s key %s %s\n", wine_dbgstr_a(udi), wine_dbgstr_a(key),
 210                 is_added ? "added" : is_removed ? "removed" : "modified" );
 211
 212     if (!strcmp( key, "volume.mount_point" )) new_device( ctx, udi );
 213 }
 214
 215
 216 static DWORD WINAPI hal_thread( void *arg )
 217 {
 218     DBusError error;
 219     DBusConnection *dbc;
 220     LibHalContext *ctx;
 221     int i, num;
 222     char **list;
 223
 224     if (!(ctx = p_libhal_ctx_new())) return 1;
 225
 226     p_dbus_error_init( &error );
 227     if (!(dbc = p_dbus_bus_get( DBUS_BUS_SYSTEM, &error )))
 228     {
 229         WARN( "failed to get system dbus connection: %s\n", error.message );
 230         p_dbus_error_free( &error );
 231         return 1;
 232     }
 233
 234     p_libhal_ctx_set_dbus_connection( ctx, dbc );
 235     p_libhal_ctx_set_device_added( ctx, new_device );
 236     p_libhal_ctx_set_device_removed( ctx, removed_device );
 237     p_libhal_ctx_set_device_property_modified( ctx, property_modified );
 238
 239     if (!p_libhal_ctx_init( ctx, &error ))
 240     {
 241         WARN( "HAL context init failed: %s\n", error.message );
 242         p_dbus_error_free( &error );
 243         return 1;
 244     }
 245
 246     /* retrieve all existing devices */
 247     if (!(list = p_libhal_get_all_devices( ctx, &num, &error ))) p_dbus_error_free( &error );
 248     else
 249     {
 250         for (i = 0; i < num; i++) new_device( ctx, list[i] );
 251         p_libhal_free_string_array( list );
 252     }
 253
 254     __TRY
 255     {
 256         while (p_dbus_connection_read_write_dispatch( dbc, -1 )) /* nothing */ ;
 257     }
 258     __EXCEPT( assert_fault )
 259     {
 260         WARN( "dbus assertion failure, disabling HAL support\n" );
 261         return 1;
 262     }
 263     __ENDTRY;
 264
 265     p_libhal_ctx_shutdown( ctx, &error );
 266     p_dbus_error_free( &error );  /* just in case */
 267     p_dbus_connection_close( dbc );
 268     p_libhal_ctx_free( ctx );
 269     return 0;
 270 }
 271
 272 void initialize_hal(void)
 273 {
 274     HANDLE handle;
 275
 276     if (!load_functions()) return;
 277     if (!(handle = CreateThread( NULL, 0, hal_thread, NULL, 0, NULL ))) return;
 278     CloseHandle( handle );
 279 }
 280
 281 #else  /* SONAME_LIBHAL */
 282
 283 void initialize_hal(void)
 284 {
 285     TRACE( "Skipping, HAL support not compiled in\n" );
 286 }
 287
 288 #endif  /* SONAME_LIBHAL */