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     no_lookup_name,               /* lookup_name */
  67     no_link_name,                 /* link_name */
  68     NULL,                         /* unlink_name */
  69     no_open_file,                 /* open_file */
  70     no_close_handle,              /* close_handle */
  71     no_destroy                    /* destroy */
  72 };
  73
  74
  75 struct directory
  76 {
  77     struct object     obj;        /* object header */
  78     struct namespace *entries;    /* directory's name space */
  79 };
  80
  81 static void directory_dump( struct object *obj, int verbose );
  82 static struct object_type *directory_get_type( struct object *obj );
  83 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
  84                                              unsigned int attr );
  85 static void directory_destroy( struct object *obj );
  86
  87 static const struct object_ops directory_ops =
  88 {
  89     sizeof(struct directory),     /* size */
  90     directory_dump,               /* dump */
  91     directory_get_type,           /* get_type */
  92     no_add_queue,                 /* add_queue */
  93     NULL,                         /* remove_queue */
  94     NULL,                         /* signaled */
  95     NULL,                         /* satisfied */
  96     no_signal,                    /* signal */
  97     no_get_fd,                    /* get_fd */
  98     default_fd_map_access,        /* map_access */
  99     default_get_sd,               /* get_sd */
 100     default_set_sd,               /* set_sd */
 101     directory_lookup_name,        /* lookup_name */
 102     no_link_name,                 /* link_name */
 103     NULL,                         /* unlink_name */
 104     no_open_file,                 /* open_file */
 105     no_close_handle,              /* close_handle */
 106     directory_destroy             /* destroy */
 107 };
 108
 109 static struct directory *root_directory;
 110 static struct directory *dir_objtype;
 111
 112
 113 static void object_type_dump( struct object *obj, int verbose )
 114 {
 115     fputs( "Object type\n", stderr );
 116 }
 117
 118 static struct object_type *object_type_get_type( struct object *obj )
 119 {
 120     static const WCHAR name[] = {'O','b','j','e','c','t','T','y','p','e'};
 121     static const struct unicode_str str = { name, sizeof(name) };
 122     return get_object_type( &str );
 123 }
 124
 125 static void directory_dump( struct object *obj, int verbose )
 126 {
 127     fputs( "Directory\n", stderr );
 128 }
 129
 130 static struct object_type *directory_get_type( struct object *obj )
 131 {
 132     static const WCHAR name[] = {'D','i','r','e','c','t','o','r','y'};
 133     static const struct unicode_str str = { name, sizeof(name) };
 134     return get_object_type( &str );
 135 }
 136
 137 static struct object *directory_lookup_name( struct object *obj, struct unicode_str *name,
 138                                              unsigned int attr )
 139 {
 140     struct directory *dir = (struct directory *)obj;
 141     struct object *found;
 142     struct unicode_str tmp;
 143     const WCHAR *p;
 144
 145     assert( obj->ops == &directory_ops );
 146
 147     if (!(p = memchrW( name->str, '\\', name->len / sizeof(WCHAR) )))
 148         /* Last element in the path name */
 149         tmp.len = name->len;
 150     else
 151         tmp.len = (p - name->str) * sizeof(WCHAR);
 152
 153     tmp.str = name->str;
 154     if ((found = find_object( dir->entries, &tmp, attr )))
 155     {
 156         /* Skip trailing \\ */
 157         if (p)
 158         {
 159             p++;
 160             tmp.len += sizeof(WCHAR);
 161         }
 162         /* Move to the next element*/
 163         name->str = p;
 164         name->len -= tmp.len;
 165         return found;
 166     }
 167
 168     if (name->str)
 169     {
 170         if (tmp.len == 0) /* Double backslash */
 171             set_error( STATUS_OBJECT_NAME_INVALID );
 172         else if (p)  /* Path still has backslashes */
 173             set_error( STATUS_OBJECT_PATH_NOT_FOUND );
 174         else
 175             clear_error();
 176     }
 177     return NULL;
 178 }
 179
 180 static void directory_destroy( struct object *obj )
 181 {
 182     struct directory *dir = (struct directory *)obj;
 183     assert( obj->ops == &directory_ops );
 184     free( dir->entries );
 185 }
 186
 187 static struct directory *create_directory( struct directory *root, const struct unicode_str *name,
 188                                            unsigned int attr, unsigned int hash_size,
 189                                            const struct security_descriptor *sd )
 190 {
 191     struct directory *dir;
 192
 193     if ((dir = create_named_object_dir( root, name, attr, &directory_ops )) &&
 194         get_error() != STATUS_OBJECT_NAME_EXISTS)
 195     {
 196         if (!(dir->entries = create_namespace( hash_size )))
 197         {
 198             release_object( dir );
 199             return NULL;
 200         }
 201         if (sd) default_set_sd( &dir->obj, sd, OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION |
 202                                 DACL_SECURITY_INFORMATION | SACL_SECURITY_INFORMATION );
 203     }
 204     return dir;
 205 }
 206
 207 struct directory *get_directory_obj( struct process *process, obj_handle_t handle, unsigned int access )
 208 {
 209     return (struct directory *)get_handle_obj( process, handle, access, &directory_ops );
 210 }
 211
 212 /******************************************************************************
 213  * Find an object by its name in a given root object
 214  *
 215  * PARAMS
 216  *  root      [I] directory to start search from or NULL to start from \\
 217  *  name      [I] object name to search for
 218  *  attr      [I] OBJECT_ATTRIBUTES.Attributes
 219  *  name_left [O] [optional] leftover name if object is not found
 220  *
 221  * RETURNS
 222  *  NULL:      If params are invalid
 223  *  Found:     If object with exact name is found returns that object
 224  *             (name_left->len == 0). Object's refcount is incremented
 225  *  Not found: The last matched parent. (name_left->len > 0)
 226  *             Parent's refcount is incremented.
 227  */
 228 struct object *find_object_dir( struct directory *root, const struct unicode_str *name,
 229                                 unsigned int attr, struct unicode_str *name_left )
 230 {
 231     struct object *obj, *parent;
 232     struct unicode_str name_tmp;
 233
 234     if (name) name_tmp = *name;
 235     else name_tmp.len = 0;
 236
 237     /* Arguments check:
 238      * - Either rootdir or name have to be specified
 239      * - If root is specified path shouldn't start with backslash */
 240     if (root)
 241     {
 242         if (name_tmp.len && name_tmp.str[0] == '\\')
 243         {
 244             set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
 245             return NULL;
 246         }
 247         parent = grab_object( root );
 248     }
 249     else
 250     {
 251         if (!name_tmp.len || name_tmp.str[0] != '\\')
 252         {
 253             set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
 254             return NULL;
 255         }
 256         parent = grab_object( &root_directory->obj );
 257         /* skip leading backslash */
 258         name_tmp.str++;
 259         name_tmp.len -= sizeof(WCHAR);
 260     }
 261
 262     /* Special case for opening RootDirectory */
 263     if (!name_tmp.len) goto done;
 264
 265     while ((obj = parent->ops->lookup_name( parent, &name_tmp, attr )))
 266     {
 267         /* move to the next element */
 268         release_object ( parent );
 269         parent = obj;
 270     }
 271     if (get_error())
 272     {
 273         release_object( parent );
 274         return NULL;
 275     }
 276
 277     done:
 278     if (name_left) *name_left = name_tmp;
 279     return parent;
 280 }
 281
 282 /* create a named (if name is present) or unnamed object. */
 283 void *create_named_object_dir( struct directory *root, const struct unicode_str *name,
 284                                unsigned int attributes, const struct object_ops *ops )
 285 {
 286     struct object *obj, *new_obj = NULL;
 287     struct unicode_str new_name;
 288
 289     if (!name || !name->len)
 290     {
 291         if ((new_obj = alloc_object( ops ))) clear_error();
 292         return new_obj;
 293     }
 294
 295     if (!(obj = find_object_dir( root, name, attributes, &new_name ))) return NULL;
 296     if (!new_name.len)
 297     {
 298         if (attributes & OBJ_OPENIF && obj->ops == ops)
 299             set_error( STATUS_OBJECT_NAME_EXISTS );
 300         else
 301         {
 302             release_object( obj );
 303             obj = NULL;
 304             if (attributes & OBJ_OPENIF)
 305                 set_error( STATUS_OBJECT_TYPE_MISMATCH );
 306             else
 307                 set_error( STATUS_OBJECT_NAME_COLLISION );
 308         }
 309         return obj;
 310     }
 311
 312     /* ATM we can't insert objects into anything else but directories */
 313     if (obj->ops != &directory_ops)
 314         set_error( STATUS_OBJECT_TYPE_MISMATCH );
 315     else
 316     {
 317         struct directory *dir = (struct directory *)obj;
 318         if ((new_obj = create_object( dir->entries, ops, &new_name, &dir->obj )))
 319             clear_error();
 320     }
 321
 322     release_object( obj );
 323     return new_obj;
 324 }
 325
 326 /* open a new handle to an existing object */
 327 void *open_object_dir( struct directory *root, const struct unicode_str *name,
 328                        unsigned int attr, const struct object_ops *ops )
 329 {
 330     struct unicode_str name_left;
 331     struct object *obj;
 332
 333     if ((obj = find_object_dir( root, name, attr, &name_left )))
 334     {
 335         if (name_left.len) /* not fully parsed */
 336             set_error( STATUS_OBJECT_NAME_NOT_FOUND );
 337         else if (ops && obj->ops != ops)
 338             set_error( STATUS_OBJECT_TYPE_MISMATCH );
 339         else
 340             return obj;
 341
 342         release_object( obj );
 343     }
 344     return NULL;
 345 }
 346
 347 /* retrieve an object type, creating it if needed */
 348 struct object_type *get_object_type( const struct unicode_str *name )
 349 {
 350     struct object_type *type;
 351
 352     if ((type = open_object_dir( dir_objtype, name, 0, &object_type_ops )))
 353         return type;
 354
 355     if ((type = create_named_object_dir( dir_objtype, name, 0, &object_type_ops )))
 356     {
 357         grab_object( type );
 358         make_object_static( &type->obj );
 359         clear_error();
 360     }
 361     return type;
 362 }
 363
 364 /* Global initialization */
 365
 366 void init_directories(void)
 367 {
 368     /* Directories */
 369     static const WCHAR dir_globalW[] = {'\\','?','?'};
 370     static const WCHAR dir_driverW[] = {'D','r','i','v','e','r'};
 371     static const WCHAR dir_deviceW[] = {'D','e','v','i','c','e'};
 372     static const WCHAR dir_nullW[] = {'\\','D','e','v','i','c','e','\\','N','u','l','l'};
 373     static const WCHAR dir_basenamedW[] = {'\\','B','a','s','e','N','a','m','e','d','O','b','j','e','c','t','s'};
 374     static const WCHAR dir_named_pipeW[] = {'\\','D','e','v','i','c','e','\\','N','a','m','e','d','P','i','p','e'};
 375     static const WCHAR dir_mailslotW[] = {'\\','D','e','v','i','c','e','\\','M','a','i','l','S','l','o','t'};
 376     static const WCHAR dir_objtypeW[] = {'O','b','j','e','c','t','T','y','p','e','s'};
 377     static const WCHAR dir_sessionsW[] = {'S','e','s','s','i','o','n','s'};
 378     static const WCHAR dir_kernelW[] = {'K','e','r','n','e','l','O','b','j','e','c','t','s'};
 379     static const WCHAR dir_windowsW[] = {'W','i','n','d','o','w','s'};
 380     static const WCHAR dir_winstationsW[] = {'W','i','n','d','o','w','S','t','a','t','i','o','n','s'};
 381     static const struct unicode_str dir_global_str = {dir_globalW, sizeof(dir_globalW)};
 382     static const struct unicode_str dir_driver_str = {dir_driverW, sizeof(dir_driverW)};
 383     static const struct unicode_str dir_device_str = {dir_deviceW, sizeof(dir_deviceW)};
 384     static const struct unicode_str dir_null_str   = {dir_nullW, sizeof(dir_nullW)};
 385     static const struct unicode_str dir_basenamed_str = {dir_basenamedW, sizeof(dir_basenamedW)};
 386     static const struct unicode_str dir_named_pipe_str = {dir_named_pipeW, sizeof(dir_named_pipeW)};
 387     static const struct unicode_str dir_mailslot_str = {dir_mailslotW, sizeof(dir_mailslotW)};
 388     static const struct unicode_str dir_objtype_str = {dir_objtypeW, sizeof(dir_objtypeW)};
 389     static const struct unicode_str dir_sessions_str = {dir_sessionsW, sizeof(dir_sessionsW)};
 390     static const struct unicode_str dir_kernel_str = {dir_kernelW, sizeof(dir_kernelW)};
 391     static const struct unicode_str dir_windows_str = {dir_windowsW, sizeof(dir_windowsW)};
 392     static const struct unicode_str dir_winstations_str = {dir_winstationsW, sizeof(dir_winstationsW)};
 393
 394     /* symlinks */
 395     static const WCHAR link_dosdevW[] = {'D','o','s','D','e','v','i','c','e','s'};
 396     static const WCHAR link_globalW[] = {'G','l','o','b','a','l'};
 397     static const WCHAR link_localW[]  = {'L','o','c','a','l'};
 398     static const WCHAR link_nulW[]    = {'N','U','L'};
 399     static const WCHAR link_pipeW[]   = {'P','I','P','E'};
 400     static const WCHAR link_mailslotW[] = {'M','A','I','L','S','L','O','T'};
 401     static const WCHAR link_0W[]      = {'0'};
 402     static const WCHAR link_sessionW[] = {'S','e','s','s','i','o','n'};
 403     static const WCHAR link_sessionsW[] = {'\\','S','e','s','s','i','o','n','s'};
 404     static const struct unicode_str link_dosdev_str = {link_dosdevW, sizeof(link_dosdevW)};
 405     static const struct unicode_str link_global_str = {link_globalW, sizeof(link_globalW)};
 406     static const struct unicode_str link_local_str  = {link_localW, sizeof(link_localW)};
 407     static const struct unicode_str link_nul_str    = {link_nulW, sizeof(link_nulW)};
 408     static const struct unicode_str link_pipe_str   = {link_pipeW, sizeof(link_pipeW)};
 409     static const struct unicode_str link_mailslot_str = {link_mailslotW, sizeof(link_mailslotW)};
 410     static const struct unicode_str link_0_str      = {link_0W, sizeof(link_0W)};
 411     static const struct unicode_str link_session_str = {link_sessionW, sizeof(link_sessionW)};
 412     static const struct unicode_str link_sessions_str = {link_sessionsW, sizeof(link_sessionsW)};
 413
 414     /* devices */
 415     static const WCHAR named_pipeW[] = {'N','a','m','e','d','P','i','p','e'};
 416     static const WCHAR mailslotW[] = {'M','a','i','l','S','l','o','t'};
 417     static const WCHAR nullW[] = {'N','u','l','l'};
 418     static const struct unicode_str named_pipe_str = {named_pipeW, sizeof(named_pipeW)};
 419     static const struct unicode_str mailslot_str = {mailslotW, sizeof(mailslotW)};
 420     static const struct unicode_str null_str = {nullW, sizeof(nullW)};
 421
 422     /* events */
 423     static const WCHAR event_low_memW[] = {'L','o','w','M','e','m','o','r','y','C','o','n','d','i','t','i','o','n'};
 424     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'};
 425     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'};
 426     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'};
 427     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'};
 428     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'};
 429     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'};
 430     static const struct unicode_str kernel_events[] =
 431     {
 432         { event_low_memW, sizeof(event_low_memW) },
 433         { event_low_pagedW, sizeof(event_low_pagedW) },
 434         { event_low_nonpgW, sizeof(event_low_nonpgW) },
 435         { event_high_memW, sizeof(event_high_memW) },
 436         { event_high_pagedW, sizeof(event_high_pagedW) },
 437         { event_high_nonpgW, sizeof(event_high_nonpgW) }
 438     };
 439     static const struct unicode_str keyed_event_crit_sect_str = {keyed_event_crit_sectW, sizeof(keyed_event_crit_sectW)};
 440
 441     struct directory *dir_driver, *dir_device, *dir_global, *dir_basenamed, *dir_sessions, *dir_kernel, *dir_windows, *dir_winstation;
 442     struct symlink *link_dosdev, *link_global1, *link_global2, *link_local, *link_nul, *link_pipe, *link_mailslot, *link_0, *link_session;
 443     struct keyed_event *keyed_event;
 444     unsigned int i;
 445
 446     root_directory = create_directory( NULL, NULL, 0, HASH_SIZE, NULL );
 447     dir_driver     = create_directory( root_directory, &dir_driver_str, 0, HASH_SIZE, NULL );
 448     dir_device     = create_directory( root_directory, &dir_device_str, 0, HASH_SIZE, NULL );
 449     dir_objtype    = create_directory( root_directory, &dir_objtype_str, 0, HASH_SIZE, NULL );
 450     dir_sessions   = create_directory( root_directory, &dir_sessions_str, 0, HASH_SIZE, NULL );
 451     dir_kernel     = create_directory( root_directory, &dir_kernel_str, 0, HASH_SIZE, NULL );
 452     dir_windows    = create_directory( root_directory, &dir_windows_str, 0, HASH_SIZE, NULL );
 453     dir_winstation = create_directory( dir_windows, &dir_winstations_str, 0, HASH_SIZE, NULL );
 454     make_object_static( &root_directory->obj );
 455     make_object_static( &dir_driver->obj );
 456     make_object_static( &dir_objtype->obj );
 457     make_object_static( &dir_winstation->obj );
 458
 459     dir_global     = create_directory( NULL, &dir_global_str, 0, HASH_SIZE, NULL );
 460     /* use a larger hash table for this one since it can contain a lot of objects */
 461     dir_basenamed  = create_directory( NULL, &dir_basenamed_str, 0, 37, NULL );
 462
 463     /* devices */
 464     create_named_pipe_device( dir_device, &named_pipe_str );
 465     create_mailslot_device( dir_device, &mailslot_str );
 466     create_unix_device( dir_device, &null_str, "/dev/null" );
 467
 468     /* symlinks */
 469     link_dosdev    = create_symlink( root_directory, &link_dosdev_str, 0, &dir_global_str, NULL );
 470     link_global1   = create_symlink( dir_global, &link_global_str, 0, &dir_global_str, NULL );
 471     link_global2   = create_symlink( dir_basenamed, &link_global_str, 0, &dir_basenamed_str, NULL );
 472     link_local     = create_symlink( dir_basenamed, &link_local_str, 0, &dir_basenamed_str, NULL );
 473     link_nul       = create_symlink( dir_global, &link_nul_str, 0, &dir_null_str, NULL );
 474     link_pipe      = create_symlink( dir_global, &link_pipe_str, 0, &dir_named_pipe_str, NULL );
 475     link_mailslot  = create_symlink( dir_global, &link_mailslot_str, 0, &dir_mailslot_str, NULL );
 476     link_0         = create_symlink( dir_sessions, &link_0_str, 0, &dir_basenamed_str, NULL );
 477     link_session   = create_symlink( dir_basenamed, &link_session_str, 0, &link_sessions_str, NULL );
 478     make_object_static( (struct object *)link_dosdev );
 479     make_object_static( (struct object *)link_global1 );
 480     make_object_static( (struct object *)link_global2 );
 481     make_object_static( (struct object *)link_local );
 482     make_object_static( (struct object *)link_nul );
 483     make_object_static( (struct object *)link_pipe );
 484     make_object_static( (struct object *)link_mailslot );
 485     make_object_static( (struct object *)link_0 );
 486     make_object_static( (struct object *)link_session );
 487
 488     /* events */
 489     for (i = 0; i < sizeof(kernel_events)/sizeof(kernel_events[0]); i++)
 490     {
 491         struct event *event = create_event( dir_kernel, &kernel_events[i], 0, 1, 0, NULL );
 492         make_object_static( (struct object *)event );
 493     }
 494     keyed_event = create_keyed_event( dir_kernel, &keyed_event_crit_sect_str, 0, NULL );
 495     make_object_static( (struct object *)keyed_event );
 496
 497     /* the objects hold references so we can release these directories */
 498     release_object( dir_global );
 499     release_object( dir_device );
 500     release_object( dir_basenamed );
 501     release_object( dir_sessions );
 502     release_object( dir_kernel );
 503     release_object( dir_windows );
 504 }
 505
 506 /* create a directory object */
 507 DECL_HANDLER(create_directory)
 508 {
 509     struct unicode_str name;
 510     struct directory *dir, *root;
 511     const struct security_descriptor *sd;
 512     const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
 513
 514     if (!objattr) return;
 515
 516     if ((dir = create_directory( root, &name, objattr->attributes, HASH_SIZE, sd )))
 517     {
 518         reply->handle = alloc_handle( current->process, dir, req->access, objattr->attributes );
 519         release_object( dir );
 520     }
 521
 522     if (root) release_object( root );
 523 }
 524
 525 /* open a directory object */
 526 DECL_HANDLER(open_directory)
 527 {
 528     struct unicode_str name = get_req_unicode_str();
 529
 530     reply->handle = open_object( current->process, req->rootdir, req->access,
 531                                  &directory_ops, &name, req->attributes );
 532 }
 533
 534 /* get a directory entry by index */
 535 DECL_HANDLER(get_directory_entry)
 536 {
 537     struct directory *dir = get_directory_obj( current->process, req->handle, DIRECTORY_QUERY );
 538     if (dir)
 539     {
 540         struct object *obj = find_object_index( dir->entries, req->index );
 541         if (obj)
 542         {
 543             data_size_t name_len, type_len = 0;
 544             const WCHAR *type_name = NULL;
 545             const WCHAR *name = get_object_name( obj, &name_len );
 546             struct object_type *type = obj->ops->get_type( obj );
 547
 548             if (type) type_name = get_object_name( &type->obj, &type_len );
 549
 550             if (name_len + type_len <= get_reply_max_size())
 551             {
 552                 void *ptr = set_reply_data_size( name_len + type_len );
 553                 if (ptr)
 554                 {
 555                     reply->name_len = name_len;
 556                     memcpy( ptr, name, name_len );
 557                     memcpy( (char *)ptr + name_len, type_name, type_len );
 558                 }
 559             }
 560             else set_error( STATUS_BUFFER_OVERFLOW );
 561
 562             if (type) release_object( type );
 563             release_object( obj );
 564         }
 565         release_object( dir );
 566     }
 567 }
 568
 569 /* unlink a named object */
 570 DECL_HANDLER(unlink_object)
 571 {
 572     struct object *obj = get_handle_obj( current->process, req->handle, 0, NULL );
 573
 574     if (obj)
 575     {
 576         unlink_named_object( obj );
 577         release_object( obj );
 578     }
 579 }
 580
 581 /* query object type name information */
 582 DECL_HANDLER(get_object_type)
 583 {
 584     struct object *obj;
 585     struct object_type *type;
 586     const WCHAR *name;
 587
 588     if (!(obj = get_handle_obj( current->process, req->handle, 0, NULL ))) return;
 589
 590     if ((type = obj->ops->get_type( obj )))
 591     {
 592         if ((name = get_object_name( &type->obj, &reply->total )))
 593             set_reply_data( name, min( reply->total, get_reply_max_size() ) );
 594         release_object( type );
 595     }
 596     release_object( obj );
 597 }