server/directory.c

   1 /*
   2  * Server-side directory object management
   3  *
   4  * Copyright (C) 2005 Vitaliy Margolen
   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
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <assert.h>
  26 #include <stdarg.h>
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <sys/types.h>
  30
  31 #include "ntstatus.h"
  32 #define WIN32_NO_STATUS
  33 #include "winternl.h"
  34 #include "ddk/wdm.h"
  35
  36 #include "handle.h"
  37 #include "request.h"
  38 #include "process.h"
  39 #include "file.h"
  40 #include "unicode.h"
  41
  42 #define HASH_SIZE 7  /* default hash size */
  43
  44 struct object_type
  45 {
  46     struct object     obj;        /* object header */
  47 };
  48
  49 static void object_type_dump( struct object *obj, int verbose );
  50 static struct object_type *object_type_get_type( struct object *obj );
  51
  52 static const struct object_ops object_type_ops =
  53 {
  54     sizeof(struct object_type),   /* size */
  55     object_type_dump,             /* dump */
  56     object_type_get_type,         /* get_type */
  57     no_add_queue,                 /* add_queue */
  58     NULL,                         /* remove_queue */
  59     NULL,                         /* signaled */
  60     NULL,                         /* satisfied */
  61     no_signal,                    /* signal */
  62     no_get_fd,                    /* get_fd */
  63     no_map_access,                /* map_access */
  64     default_get_sd,               /* get_sd */
  65     default_set_sd,               /* set_sd */
  66     default_get_full_name,        /* get_full_name */
  67     no_lookup_name,               /* lookup_name */
  68     directory_link_name,          /* link_name */
  69     default_unlink_name,          /* unlink_name */
  70     no_open_file,                 /* open_file */
  71     no_kernel_obj_list,           /* get_kernel_obj_list */
  72     no_close_handle,              /* close_handle */
  73     no_destroy                    /* destroy */
  74 };
  75
  76
  77 struct directory
  78 {
  79     struct object     obj;        /* object header */
  80     struct namespace *entries;    /* directory's name space */
  81 };
  82
  83 static void directory_dump( struct object *obj, int verbose );
  84 static struct object_type *directory_get_type( struct object *obj );
  85 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
  86                                              unsigned int attr );
  87 static void directory_destroy( struct object *obj );
  88
  89 static const struct object_ops directory_ops =
  90 {
  91     sizeof(struct directory),     /* size */
  92     directory_dump,               /* dump */
  93     directory_get_type,           /* get_type */
  94     no_add_queue,                 /* add_queue */
  95     NULL,                         /* remove_queue */
  96     NULL,                         /* signaled */
  97     NULL,                         /* satisfied */
  98     no_signal,                    /* signal */
  99     no_get_fd,                    /* get_fd */
 100     default_fd_map_access,        /* map_access */
 101     default_get_sd,               /* get_sd */
 102     default_set_sd,               /* set_sd */
 103     default_get_full_name,        /* get_full_name */
 104     directory_lookup_name,        /* lookup_name */
 105     directory_link_name,          /* link_name */
 106     default_unlink_name,          /* unlink_name */
 107     no_open_file,                 /* open_file */
 108     no_kernel_obj_list,           /* get_kernel_obj_list */
 109     no_close_handle,              /* close_handle */
 110     directory_destroy             /* destroy */
 111 };
 112
 113 static struct directory *root_directory;
 114 static struct directory *dir_objtype;
 115
 116
 117 static void object_type_dump( struct object *obj, int verbose )
 118 {
 119     fputs( "Object type\n", stderr );
 120 }
 121
 122 static struct object_type *object_type_get_type( struct object *obj )
 123 {
 124     static const WCHAR name[] = {'O','b','j','e','c','t','T','y','p','e'};
 125     static const struct unicode_str str = { name, sizeof(name) };
 126     return get_object_type( &str );
 127 }
 128
 129 static void directory_dump( struct object *obj, int verbose )
 130 {
 131     fputs( "Directory\n", stderr );
 132 }
 133
 134 static struct object_type *directory_get_type( struct object *obj )
 135 {
 136     static const WCHAR name[] = {'D','i','r','e','c','t','o','r','y'};
 137     static const struct unicode_str str = { name, sizeof(name) };
 138     return get_object_type( &str );
 139 }
 140
 141 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
 142                                              unsigned int attr )
 143 {
 144     struct directory *dir = (struct directory *)obj;
 145     struct object *found;
 146     struct unicode_str tmp;
 147
 148     assert( obj->ops == &directory_ops );
 149
 150     if (!name) return NULL;  /* open the directory itself */
 151
 152     tmp.str = name->str;
 153     tmp.len = get_path_element( name->str, name->len );
 154
 155     if ((found = find_object( dir->entries, &tmp, attr )))
 156     {
 157         /* Skip trailing \\ and move to the next element */
 158         if (tmp.len < name->len)
 159         {
 160             tmp.len += sizeof(WCHAR);
 161             name->str += tmp.len / sizeof(WCHAR);
 162             name->len -= tmp.len;
 163         }
 164         else
 165         {
 166             name->str = NULL;
 167             name->len = 0;
 168         }
 169         return found;
 170     }
 171
 172     if (name->str)  /* not the last element */
 173     {
 174         if (tmp.len == 0) /* Double backslash */
 175             set_error( STATUS_OBJECT_NAME_INVALID );
 176         else if (tmp.len < name->len)  /* Path still has backslashes */
 177             set_error( STATUS_OBJECT_PATH_NOT_FOUND );
 178     }
 179     return NULL;
 180 }
 181
 182 int directory_link_name( struct object *obj, struct object_name *name, struct object *parent )
 183 {
 184     struct directory *dir = (struct directory *)parent;
 185
 186     if (parent->ops != &directory_ops)
 187     {
 188         set_error( STATUS_OBJECT_TYPE_MISMATCH );
 189         return 0;
 190     }
 191     namespace_add( dir->entries, name );
 192     name->parent = grab_object( parent );
 193     return 1;
 194 }
 195
 196 static void directory_destroy( struct object *obj )
 197 {
 198     struct directory *dir = (struct directory *)obj;
 199     assert( obj->ops == &directory_ops );
 200     free( dir->entries );
 201 }
 202
 203 static struct directory *create_directory( struct object *root, const struct unicode_str *name,
 204                                            unsigned int attr, unsigned int hash_size,
 205                                            const struct security_descriptor *sd )
 206 {
 207     struct directory *dir;
 208
 209     if ((dir = create_named_object( root, &directory_ops, name, attr, sd )) &&
 210         get_error() != STATUS_OBJECT_NAME_EXISTS)
 211     {
 212         if (!(dir->entries = create_namespace( hash_size )))
 213         {
 214             release_object( dir );
 215             return NULL;
 216         }
 217     }
 218     return dir;
 219 }
 220
 221 struct object *get_root_directory(void)
 222 {
 223     return grab_object( root_directory );
 224 }
 225
 226 /* return a directory object for creating/opening some object; no access rights are required */
 227 struct object *get_directory_obj( struct process *process, obj_handle_t handle )
 228 {
 229     return get_handle_obj( process, handle, 0, &directory_ops );
 230 }
 231
 232 /* retrieve an object type, creating it if needed */
 233 struct object_type *get_object_type( const struct unicode_str *name )
 234 {
 235     struct object_type *type;
 236
 237     if ((type = create_named_object( &dir_objtype->obj, &object_type_ops, name,
 238                                      OBJ_OPENIF | OBJ_PERMANENT, NULL )))
 239         clear_error();
 240     return type;
 241 }
 242
 243 /* Global initialization */
 244
 245 static void create_session( unsigned int id )
 246 {
 247     /* directories */
 248     static const WCHAR dir_sessionsW[] = {'S','e','s','s','i','o','n','s'};
 249     static const WCHAR dir_bnolinksW[] = {'B','N','O','L','I','N','K','S'};
 250     static const WCHAR dir_bnoW[] = {'B','a','s','e','N','a','m','e','d','O','b','j','e','c','t','s'};
 251     static const WCHAR dir_dosdevicesW[] = {'D','o','s','D','e','v','i','c','e','s'};
 252     static const WCHAR dir_nlsW[] = {'N','L','S'};
 253     static const WCHAR dir_windowsW[] = {'W','i','n','d','o','w','s'};
 254     static const WCHAR dir_winstationsW[] = {'W','i','n','d','o','w','S','t','a','t','i','o','n','s'};
 255     static const struct unicode_str dir_sessions_str = {dir_sessionsW, sizeof(dir_sessionsW)};
 256     static const struct unicode_str dir_bnolinks_str = {dir_bnolinksW, sizeof(dir_bnolinksW)};
 257     static const struct unicode_str dir_bno_str = {dir_bnoW, sizeof(dir_bnoW)};
 258     static const struct unicode_str dir_dosdevices_str = {dir_dosdevicesW, sizeof(dir_dosdevicesW)};
 259     static const struct unicode_str dir_nls_str = {dir_nlsW, sizeof(dir_nlsW)};
 260     static const struct unicode_str dir_windows_str = {dir_windowsW, sizeof(dir_windowsW)};
 261     static const struct unicode_str dir_winstations_str = {dir_winstationsW, sizeof(dir_winstationsW)};
 262
 263     /* symlinks */
 264     static const WCHAR link_globalW[] = {'G','l','o','b','a','l'};
 265     static const WCHAR link_localW[]  = {'L','o','c','a','l'};
 266     static const WCHAR link_sessionW[] = {'S','e','s','s','i','o','n'};
 267     static const struct unicode_str link_global_str = {link_globalW, sizeof(link_globalW)};
 268     static const struct unicode_str link_local_str = {link_localW, sizeof(link_localW)};
 269     static const struct unicode_str link_session_str = {link_sessionW, sizeof(link_sessionW)};
 270
 271     static struct directory *dir_bno_global, *dir_sessions, *dir_bnolinks;
 272     struct directory *dir_id, *dir_bno, *dir_dosdevices, *dir_windows, *dir_winstation;
 273     struct object *link_global, *link_local, *link_session, *link_bno, *link_windows;
 274     struct unicode_str id_str;
 275     char id_strA[10];
 276     WCHAR *id_strW;
 277
 278     if (!id)
 279     {
 280         dir_bno_global = create_directory( &root_directory->obj, &dir_bno_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 281         dir_sessions   = create_directory( &root_directory->obj, &dir_sessions_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 282         dir_bnolinks   = create_directory( &dir_sessions->obj, &dir_bnolinks_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 283         release_object( create_directory( &root_directory->obj, &dir_nls_str, OBJ_PERMANENT, HASH_SIZE, NULL ));
 284         release_object( dir_bno_global );
 285         release_object( dir_bnolinks );
 286         release_object( dir_sessions );
 287     }
 288
 289     sprintf( id_strA, "%u", id );
 290     id_strW = ascii_to_unicode_str( id_strA, &id_str );
 291     dir_id = create_directory( &dir_sessions->obj, &id_str, 0, HASH_SIZE, NULL );
 292     dir_dosdevices = create_directory( &dir_id->obj, &dir_dosdevices_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 293
 294     /* for session 0, directories are created under the root */
 295     if (!id)
 296     {
 297         dir_bno      = (struct directory *)grab_object( dir_bno_global );
 298         dir_windows  = create_directory( &root_directory->obj, &dir_windows_str, 0, HASH_SIZE, NULL );
 299         link_bno     = create_obj_symlink( &dir_id->obj, &dir_bno_str, OBJ_PERMANENT, &dir_bno->obj, NULL );
 300         link_windows = create_obj_symlink( &dir_id->obj, &dir_windows_str, OBJ_PERMANENT, &dir_windows->obj, NULL );
 301         release_object( link_bno );
 302         release_object( link_windows );
 303     }
 304     else
 305     {
 306         /* use a larger hash table for this one since it can contain a lot of objects */
 307         dir_bno     = create_directory( &dir_id->obj, &dir_bno_str, 0, 37, NULL );
 308         dir_windows = create_directory( &dir_id->obj, &dir_windows_str, 0, HASH_SIZE, NULL );
 309     }
 310     dir_winstation = create_directory( &dir_windows->obj, &dir_winstations_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 311
 312     link_global  = create_obj_symlink( &dir_bno->obj, &link_global_str, OBJ_PERMANENT, &dir_bno_global->obj, NULL );
 313     link_local   = create_obj_symlink( &dir_bno->obj, &link_local_str, OBJ_PERMANENT, &dir_bno->obj, NULL );
 314     link_session = create_obj_symlink( &dir_bno->obj, &link_session_str, OBJ_PERMANENT, &dir_bnolinks->obj, NULL );
 315     link_bno     = create_obj_symlink( &dir_bnolinks->obj, &id_str, OBJ_PERMANENT, &dir_bno->obj, NULL );
 316     release_object( link_global );
 317     release_object( link_local );
 318     release_object( link_session );
 319     release_object( link_bno );
 320
 321     release_object( dir_dosdevices );
 322     release_object( dir_winstation );
 323     release_object( dir_windows );
 324     release_object( dir_bno );
 325     release_object( dir_id );
 326     free( id_strW );
 327 }
 328
 329 void init_directories(void)
 330 {
 331     /* Directories */
 332     static const WCHAR dir_globalW[] = {'?','?'};
 333     static const WCHAR dir_driverW[] = {'D','r','i','v','e','r'};
 334     static const WCHAR dir_deviceW[] = {'D','e','v','i','c','e'};
 335     static const WCHAR dir_objtypeW[] = {'O','b','j','e','c','t','T','y','p','e','s'};
 336     static const WCHAR dir_kernelW[] = {'K','e','r','n','e','l','O','b','j','e','c','t','s'};
 337     static const struct unicode_str dir_global_str = {dir_globalW, sizeof(dir_globalW)};
 338     static const struct unicode_str dir_driver_str = {dir_driverW, sizeof(dir_driverW)};
 339     static const struct unicode_str dir_device_str = {dir_deviceW, sizeof(dir_deviceW)};
 340     static const struct unicode_str dir_objtype_str = {dir_objtypeW, sizeof(dir_objtypeW)};
 341     static const struct unicode_str dir_kernel_str = {dir_kernelW, sizeof(dir_kernelW)};
 342
 343     /* symlinks */
 344     static const WCHAR link_dosdevW[] = {'D','o','s','D','e','v','i','c','e','s'};
 345     static const WCHAR link_globalW[] = {'G','l','o','b','a','l'};
 346     static const WCHAR link_nulW[]    = {'N','U','L'};
 347     static const WCHAR link_pipeW[]   = {'P','I','P','E'};
 348     static const WCHAR link_mailslotW[] = {'M','A','I','L','S','L','O','T'};
 349     static const WCHAR link_coninW[]  = {'C','O','N','I','N','$'};
 350     static const WCHAR link_conoutW[] = {'C','O','N','O','U','T','$'};
 351     static const WCHAR link_conW[]    = {'C','O','N'};
 352     static const WCHAR link_currentinW[]  = {'\\','D','e','v','i','c','e','\\','C','o','n','D','r','v',
 353         '\\','C','u','r','r','e','n','t','I','n'};
 354     static const WCHAR link_currentoutW[] = {'\\','D','e','v','i','c','e','\\','C','o','n','D','r','v',
 355         '\\','C','u','r','r','e','n','t','O','u','t'};
 356     static const WCHAR link_consoleW[]    = {'\\','D','e','v','i','c','e','\\','C','o','n','D','r','v',
 357         '\\','C','o','n','s','o','l','e'};
 358     static const struct unicode_str link_dosdev_str = {link_dosdevW, sizeof(link_dosdevW)};
 359     static const struct unicode_str link_global_str = {link_globalW, sizeof(link_globalW)};
 360     static const struct unicode_str link_nul_str    = {link_nulW, sizeof(link_nulW)};
 361     static const struct unicode_str link_pipe_str   = {link_pipeW, sizeof(link_pipeW)};
 362     static const struct unicode_str link_mailslot_str = {link_mailslotW, sizeof(link_mailslotW)};
 363     static const struct unicode_str link_con_str      = {link_conW, sizeof(link_conW)};
 364     static const struct unicode_str link_conin_str    = {link_coninW, sizeof(link_coninW)};
 365     static const struct unicode_str link_conout_str   = {link_conoutW, sizeof(link_conoutW)};
 366     static const struct unicode_str link_currentin_str = {link_currentinW, sizeof(link_currentinW)};
 367     static const struct unicode_str link_currentout_str = {link_currentoutW, sizeof(link_currentoutW)};
 368     static const struct unicode_str link_console_str  = {link_consoleW, sizeof(link_consoleW)};
 369
 370     /* devices */
 371     static const WCHAR named_pipeW[] = {'N','a','m','e','d','P','i','p','e'};
 372     static const WCHAR mailslotW[] = {'M','a','i','l','S','l','o','t'};
 373     static const WCHAR condrvW[] = {'C','o','n','D','r','v'};
 374     static const WCHAR nullW[] = {'N','u','l','l'};
 375     static const WCHAR afdW[] = {'A','f','d'};
 376     static const struct unicode_str named_pipe_str = {named_pipeW, sizeof(named_pipeW)};
 377     static const struct unicode_str mailslot_str = {mailslotW, sizeof(mailslotW)};
 378     static const struct unicode_str condrv_str = {condrvW, sizeof(condrvW)};
 379     static const struct unicode_str null_str = {nullW, sizeof(nullW)};
 380     static const struct unicode_str afd_str = {afdW, sizeof(afdW)};
 381
 382     /* events */
 383     static const WCHAR event_low_memW[] = {'L','o','w','M','e','m','o','r','y','C','o','n','d','i','t','i','o','n'};
 384     static const WCHAR event_low_pagedW[] = {'L','o','w','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
 385     static const WCHAR event_low_nonpgW[] = {'L','o','w','N','o','n','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
 386     static const WCHAR event_high_memW[] = {'H','i','g','h','M','e','m','o','r','y','C','o','n','d','i','t','i','o','n'};
 387     static const WCHAR event_high_pagedW[] = {'H','i','g','h','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
 388     static const WCHAR event_high_nonpgW[] = {'H','i','g','h','N','o','n','P','a','g','e','d','P','o','o','l','C','o','n','d','i','t','i','o','n'};
 389     static const WCHAR keyed_event_crit_sectW[] = {'C','r','i','t','S','e','c','O','u','t','O','f','M','e','m','o','r','y','E','v','e','n','t'};
 390     static const struct unicode_str kernel_events[] =
 391     {
 392         { event_low_memW, sizeof(event_low_memW) },
 393         { event_low_pagedW, sizeof(event_low_pagedW) },
 394         { event_low_nonpgW, sizeof(event_low_nonpgW) },
 395         { event_high_memW, sizeof(event_high_memW) },
 396         { event_high_pagedW, sizeof(event_high_pagedW) },
 397         { event_high_nonpgW, sizeof(event_high_nonpgW) }
 398     };
 399     static const struct unicode_str keyed_event_crit_sect_str = {keyed_event_crit_sectW, sizeof(keyed_event_crit_sectW)};
 400
 401     /* mappings */
 402     static const WCHAR user_dataW[] = {'_','_','w','i','n','e','_','u','s','e','r','_','s','h','a','r','e','d','_','d','a','t','a'};
 403     static const struct unicode_str user_data_str = {user_dataW, sizeof(user_dataW)};
 404
 405     struct directory *dir_driver, *dir_device, *dir_global, *dir_kernel;
 406     struct object *named_pipe_device, *mailslot_device, *null_device;
 407     unsigned int i;
 408
 409     root_directory = create_directory( NULL, NULL, OBJ_PERMANENT, HASH_SIZE, NULL );
 410     dir_driver     = create_directory( &root_directory->obj, &dir_driver_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 411     dir_device     = create_directory( &root_directory->obj, &dir_device_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 412     dir_objtype    = create_directory( &root_directory->obj, &dir_objtype_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 413     dir_kernel     = create_directory( &root_directory->obj, &dir_kernel_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 414     dir_global     = create_directory( &root_directory->obj, &dir_global_str, OBJ_PERMANENT, HASH_SIZE, NULL );
 415
 416     /* devices */
 417     named_pipe_device = create_named_pipe_device( &dir_device->obj, &named_pipe_str, OBJ_PERMANENT, NULL );
 418     mailslot_device   = create_mailslot_device( &dir_device->obj, &mailslot_str, OBJ_PERMANENT, NULL );
 419     null_device       = create_unix_device( &dir_device->obj, &null_str, OBJ_PERMANENT, NULL, "/dev/null" );
 420     release_object( create_console_device( &dir_device->obj, &condrv_str, OBJ_PERMANENT, NULL ));
 421     release_object( create_socket_device( &dir_device->obj, &afd_str, OBJ_PERMANENT, NULL ));
 422
 423     /* sessions */
 424     create_session( 0 );
 425     create_session( 1 );
 426
 427     /* symlinks */
 428     release_object( create_obj_symlink( &root_directory->obj, &link_dosdev_str, OBJ_PERMANENT, &dir_global->obj, NULL ));
 429     release_object( create_obj_symlink( &dir_global->obj, &link_global_str, OBJ_PERMANENT, &dir_global->obj, NULL ));
 430     release_object( create_obj_symlink( &dir_global->obj, &link_nul_str, OBJ_PERMANENT, null_device, NULL ));
 431     release_object( create_obj_symlink( &dir_global->obj, &link_pipe_str, OBJ_PERMANENT, named_pipe_device, NULL ));
 432     release_object( create_obj_symlink( &dir_global->obj, &link_mailslot_str, OBJ_PERMANENT, mailslot_device, NULL ));
 433     release_object( create_symlink( &dir_global->obj, &link_conin_str, OBJ_PERMANENT, &link_currentin_str, NULL ));
 434     release_object( create_symlink( &dir_global->obj, &link_conout_str, OBJ_PERMANENT, &link_currentout_str, NULL ));
 435     release_object( create_symlink( &dir_global->obj, &link_con_str, OBJ_PERMANENT, &link_console_str, NULL ));
 436
 437     /* events */
 438     for (i = 0; i < ARRAY_SIZE( kernel_events ); i++)
 439         release_object( create_event( &dir_kernel->obj, &kernel_events[i], OBJ_PERMANENT, 1, 0, NULL ));
 440     release_object( create_keyed_event( &dir_kernel->obj, &keyed_event_crit_sect_str, OBJ_PERMANENT, NULL ));
 441
 442     /* user data mapping */
 443     release_object( create_user_data_mapping( &dir_kernel->obj, &user_data_str, OBJ_PERMANENT, NULL ));
 444
 445     release_object( named_pipe_device );
 446     release_object( mailslot_device );
 447     release_object( null_device );
 448     release_object( root_directory );
 449     release_object( dir_driver );
 450     release_object( dir_device );
 451     release_object( dir_objtype );
 452     release_object( dir_kernel );
 453     release_object( dir_global );
 454 }
 455
 456 /* create a directory object */
 457 DECL_HANDLER(create_directory)
 458 {
 459     struct unicode_str name;
 460     struct object *root;
 461     struct directory *dir;
 462     const struct security_descriptor *sd;
 463     const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
 464
 465     if (!objattr) return;
 466
 467     if ((dir = create_directory( root, &name, objattr->attributes, HASH_SIZE, sd )))
 468     {
 469         reply->handle = alloc_handle( current->process, dir, req->access, objattr->attributes );
 470         release_object( dir );
 471     }
 472
 473     if (root) release_object( root );
 474 }
 475
 476 /* open a directory object */
 477 DECL_HANDLER(open_directory)
 478 {
 479     struct unicode_str name = get_req_unicode_str();
 480
 481     reply->handle = open_object( current->process, req->rootdir, req->access,
 482                                  &directory_ops, &name, req->attributes );
 483 }
 484
 485 /* get a directory entry by index */
 486 DECL_HANDLER(get_directory_entry)
 487 {
 488     struct directory *dir = (struct directory *)get_handle_obj( current->process, req->handle,
 489                                                                 DIRECTORY_QUERY, &directory_ops );
 490     if (dir)
 491     {
 492         struct object *obj = find_object_index( dir->entries, req->index );
 493         if (obj)
 494         {
 495             data_size_t name_len, type_len = 0;
 496             const WCHAR *type_name = NULL;
 497             const WCHAR *name = get_object_name( obj, &name_len );
 498             struct object_type *type = obj->ops->get_type( obj );
 499
 500             if (type) type_name = get_object_name( &type->obj, &type_len );
 501
 502             if (name_len + type_len <= get_reply_max_size())
 503             {
 504                 void *ptr = set_reply_data_size( name_len + type_len );
 505                 if (ptr)
 506                 {
 507                     reply->name_len = name_len;
 508                     memcpy( ptr, name, name_len );
 509                     memcpy( (char *)ptr + name_len, type_name, type_len );
 510                 }
 511             }
 512             else set_error( STATUS_BUFFER_OVERFLOW );
 513
 514             if (type) release_object( type );
 515             release_object( obj );
 516         }
 517         release_object( dir );
 518     }
 519 }
 520
 521 /* query object type name information */
 522 DECL_HANDLER(get_object_type)
 523 {
 524     struct object *obj;
 525     struct object_type *type;
 526     const WCHAR *name;
 527
 528     if (!(obj = get_handle_obj( current->process, req->handle, 0, NULL ))) return;
 529
 530     if ((type = obj->ops->get_type( obj )))
 531     {
 532         if ((name = get_object_name( &type->obj, &reply->total )))
 533             set_reply_data( name, min( reply->total, get_reply_max_size() ) );
 534         release_object( type );
 535     }
 536     release_object( obj );
 537 }