git.oblomov.eu Git - wine/blob - server/winstation.c

   1 /*
   2  * Server-side window stations and desktops handling
   3  *
   4  * Copyright (C) 2002, 2005 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 <stdio.h>
  25 #include <stdarg.h>
  26
  27 #include "ntstatus.h"
  28 #define WIN32_NO_STATUS
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winuser.h"
  32 #include "winternl.h"
  33
  34 #include "object.h"
  35 #include "handle.h"
  36 #include "request.h"
  37 #include "process.h"
  38 #include "user.h"
  39 #include "file.h"
  40 #include "security.h"
  41 #include "wine/unicode.h"
  42
  43
  44 static struct list winstation_list = LIST_INIT(winstation_list);
  45 static struct namespace *winstation_namespace;
  46
  47 static void winstation_dump( struct object *obj, int verbose );
  48 static struct object_type *winstation_get_type( struct object *obj );
  49 static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
  50 static void winstation_destroy( struct object *obj );
  51 static unsigned int winstation_map_access( struct object *obj, unsigned int access );
  52 static void desktop_dump( struct object *obj, int verbose );
  53 static struct object_type *desktop_get_type( struct object *obj );
  54 static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
  55 static void desktop_destroy( struct object *obj );
  56 static unsigned int desktop_map_access( struct object *obj, unsigned int access );
  57
  58 static const struct object_ops winstation_ops =
  59 {
  60     sizeof(struct winstation),    /* size */
  61     winstation_dump,              /* dump */
  62     winstation_get_type,          /* get_type */
  63     no_add_queue,                 /* add_queue */
  64     NULL,                         /* remove_queue */
  65     NULL,                         /* signaled */
  66     NULL,                         /* satisfied */
  67     no_signal,                    /* signal */
  68     no_get_fd,                    /* get_fd */
  69     winstation_map_access,        /* map_access */
  70     default_get_sd,               /* get_sd */
  71     default_set_sd,               /* set_sd */
  72     no_lookup_name,               /* lookup_name */
  73     no_open_file,                 /* open_file */
  74     winstation_close_handle,      /* close_handle */
  75     winstation_destroy            /* destroy */
  76 };
  77
  78
  79 static const struct object_ops desktop_ops =
  80 {
  81     sizeof(struct desktop),       /* size */
  82     desktop_dump,                 /* dump */
  83     desktop_get_type,             /* get_type */
  84     no_add_queue,                 /* add_queue */
  85     NULL,                         /* remove_queue */
  86     NULL,                         /* signaled */
  87     NULL,                         /* satisfied */
  88     no_signal,                    /* signal */
  89     no_get_fd,                    /* get_fd */
  90     desktop_map_access,           /* map_access */
  91     default_get_sd,               /* get_sd */
  92     default_set_sd,               /* set_sd */
  93     no_lookup_name,               /* lookup_name */
  94     no_open_file,                 /* open_file */
  95     desktop_close_handle,         /* close_handle */
  96     desktop_destroy               /* destroy */
  97 };
  98
  99 #define DESKTOP_ALL_ACCESS 0x01ff
 100
 101 /* create a winstation object */
 102 static struct winstation *create_winstation( const struct unicode_str *name, unsigned int attr,
 103                                              unsigned int flags )
 104 {
 105     struct winstation *winstation;
 106
 107     if (!winstation_namespace && !(winstation_namespace = create_namespace( 7 )))
 108         return NULL;
 109
 110     if (memchrW( name->str, '\\', name->len / sizeof(WCHAR) ))  /* no backslash allowed in name */
 111     {
 112         set_error( STATUS_INVALID_PARAMETER );
 113         return NULL;
 114     }
 115
 116     if ((winstation = create_named_object( winstation_namespace, &winstation_ops, name, attr )))
 117     {
 118         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
 119         {
 120             /* initialize it if it didn't already exist */
 121             winstation->flags = flags;
 122             winstation->clipboard = NULL;
 123             winstation->atom_table = NULL;
 124             list_add_tail( &winstation_list, &winstation->entry );
 125             list_init( &winstation->desktops );
 126         }
 127     }
 128     return winstation;
 129 }
 130
 131 static void winstation_dump( struct object *obj, int verbose )
 132 {
 133     struct winstation *winstation = (struct winstation *)obj;
 134
 135     fprintf( stderr, "Winstation flags=%x clipboard=%p atoms=%p ",
 136              winstation->flags, winstation->clipboard, winstation->atom_table );
 137     dump_object_name( &winstation->obj );
 138     fputc( '\n', stderr );
 139 }
 140
 141 static struct object_type *winstation_get_type( struct object *obj )
 142 {
 143     static const WCHAR name[] = {'W','i','n','d','o','w','S','t','a','t','i','o','n'};
 144     static const struct unicode_str str = { name, sizeof(name) };
 145     return get_object_type( &str );
 146 }
 147
 148 static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
 149 {
 150     return (process->winstation != handle);
 151 }
 152
 153 static void winstation_destroy( struct object *obj )
 154 {
 155     struct winstation *winstation = (struct winstation *)obj;
 156
 157     list_remove( &winstation->entry );
 158     if (winstation->clipboard) release_object( winstation->clipboard );
 159     if (winstation->atom_table) release_object( winstation->atom_table );
 160 }
 161
 162 static unsigned int winstation_map_access( struct object *obj, unsigned int access )
 163 {
 164     if (access & GENERIC_READ)    access |= STANDARD_RIGHTS_READ | WINSTA_ENUMDESKTOPS | WINSTA_READATTRIBUTES |
 165                                             WINSTA_ENUMERATE | WINSTA_READSCREEN;
 166     if (access & GENERIC_WRITE)   access |= STANDARD_RIGHTS_WRITE | WINSTA_ACCESSCLIPBOARD | WINSTA_CREATEDESKTOP |
 167                                             WINSTA_WRITEATTRIBUTES;
 168     if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | WINSTA_ACCESSGLOBALATOMS | WINSTA_EXITWINDOWS;
 169     if (access & GENERIC_ALL)     access |= STANDARD_RIGHTS_REQUIRED | WINSTA_ALL_ACCESS;
 170     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 171 }
 172
 173 /* retrieve the process window station, checking the handle access rights */
 174 struct winstation *get_process_winstation( struct process *process, unsigned int access )
 175 {
 176     return (struct winstation *)get_handle_obj( process, process->winstation,
 177                                                 access, &winstation_ops );
 178 }
 179
 180 /* build the full name of a desktop object */
 181 static WCHAR *build_desktop_name( const struct unicode_str *name,
 182                                   struct winstation *winstation, struct unicode_str *res )
 183 {
 184     const WCHAR *winstation_name;
 185     WCHAR *full_name;
 186     data_size_t winstation_len;
 187
 188     if (memchrW( name->str, '\\', name->len / sizeof(WCHAR) ))
 189     {
 190         set_error( STATUS_INVALID_PARAMETER );
 191         return NULL;
 192     }
 193
 194     if (!(winstation_name = get_object_name( &winstation->obj, &winstation_len )))
 195         winstation_len = 0;
 196
 197     res->len = winstation_len + name->len + sizeof(WCHAR);
 198     if (!(full_name = mem_alloc( res->len ))) return NULL;
 199     memcpy( full_name, winstation_name, winstation_len );
 200     full_name[winstation_len / sizeof(WCHAR)] = '\\';
 201     memcpy( full_name + winstation_len / sizeof(WCHAR) + 1, name->str, name->len );
 202     res->str = full_name;
 203     return full_name;
 204 }
 205
 206 /* retrieve a pointer to a desktop object */
 207 struct desktop *get_desktop_obj( struct process *process, obj_handle_t handle, unsigned int access )
 208 {
 209     return (struct desktop *)get_handle_obj( process, handle, access, &desktop_ops );
 210 }
 211
 212 /* create a desktop object */
 213 static struct desktop *create_desktop( const struct unicode_str *name, unsigned int attr,
 214                                        unsigned int flags, struct winstation *winstation )
 215 {
 216     struct desktop *desktop;
 217     struct unicode_str full_str;
 218     WCHAR *full_name;
 219
 220     if (!(full_name = build_desktop_name( name, winstation, &full_str ))) return NULL;
 221
 222     if ((desktop = create_named_object( winstation_namespace, &desktop_ops, &full_str, attr )))
 223     {
 224         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
 225         {
 226             /* initialize it if it didn't already exist */
 227             desktop->flags = flags;
 228             desktop->winstation = (struct winstation *)grab_object( winstation );
 229             desktop->top_window = NULL;
 230             desktop->msg_window = NULL;
 231             desktop->global_hooks = NULL;
 232             desktop->close_timeout = NULL;
 233             desktop->foreground_input = NULL;
 234             desktop->users = 0;
 235             memset( &desktop->cursor, 0, sizeof(desktop->cursor) );
 236             memset( desktop->keystate, 0, sizeof(desktop->keystate) );
 237             list_add_tail( &winstation->desktops, &desktop->entry );
 238         }
 239     }
 240     free( full_name );
 241     return desktop;
 242 }
 243
 244 static void desktop_dump( struct object *obj, int verbose )
 245 {
 246     struct desktop *desktop = (struct desktop *)obj;
 247
 248     fprintf( stderr, "Desktop flags=%x winstation=%p top_win=%p hooks=%p ",
 249              desktop->flags, desktop->winstation, desktop->top_window, desktop->global_hooks );
 250     dump_object_name( &desktop->obj );
 251     fputc( '\n', stderr );
 252 }
 253
 254 static struct object_type *desktop_get_type( struct object *obj )
 255 {
 256     static const WCHAR name[] = {'D','e','s','k','t','o','p'};
 257     static const struct unicode_str str = { name, sizeof(name) };
 258     return get_object_type( &str );
 259 }
 260
 261 static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
 262 {
 263     struct thread *thread;
 264
 265     /* check if the handle is currently used by the process or one of its threads */
 266     if (process->desktop == handle) return 0;
 267     LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
 268         if (thread->desktop == handle) return 0;
 269     return 1;
 270 }
 271
 272 static void desktop_destroy( struct object *obj )
 273 {
 274     struct desktop *desktop = (struct desktop *)obj;
 275
 276     if (desktop->top_window) destroy_window( desktop->top_window );
 277     if (desktop->msg_window) destroy_window( desktop->msg_window );
 278     if (desktop->global_hooks) release_object( desktop->global_hooks );
 279     if (desktop->close_timeout) remove_timeout_user( desktop->close_timeout );
 280     list_remove( &desktop->entry );
 281     release_object( desktop->winstation );
 282 }
 283
 284 static unsigned int desktop_map_access( struct object *obj, unsigned int access )
 285 {
 286     if (access & GENERIC_READ)    access |= STANDARD_RIGHTS_READ | DESKTOP_READOBJECTS | DESKTOP_ENUMERATE;
 287     if (access & GENERIC_WRITE)   access |= STANDARD_RIGHTS_WRITE | DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW |
 288                                             DESKTOP_HOOKCONTROL | DESKTOP_JOURNALRECORD | DESKTOP_JOURNALPLAYBACK |
 289                                             DESKTOP_WRITEOBJECTS;
 290     if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | DESKTOP_SWITCHDESKTOP;
 291     if (access & GENERIC_ALL)     access |= STANDARD_RIGHTS_REQUIRED | DESKTOP_ALL_ACCESS;
 292     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 293 }
 294
 295 /* retrieve the thread desktop, checking the handle access rights */
 296 struct desktop *get_thread_desktop( struct thread *thread, unsigned int access )
 297 {
 298     return get_desktop_obj( thread->process, thread->desktop, access );
 299 }
 300
 301 /* set the process default desktop handle */
 302 void set_process_default_desktop( struct process *process, struct desktop *desktop,
 303                                   obj_handle_t handle )
 304 {
 305     struct thread *thread;
 306     struct desktop *old_desktop;
 307
 308     if (process->desktop == handle) return;  /* nothing to do */
 309
 310     if (!(old_desktop = get_desktop_obj( process, process->desktop, 0 ))) clear_error();
 311     process->desktop = handle;
 312
 313     /* set desktop for threads that don't have one yet */
 314     LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
 315         if (!thread->desktop) thread->desktop = handle;
 316
 317     if (!process->is_system)
 318     {
 319         desktop->users++;
 320         if (desktop->close_timeout)
 321         {
 322             remove_timeout_user( desktop->close_timeout );
 323             desktop->close_timeout = NULL;
 324         }
 325         if (old_desktop) old_desktop->users--;
 326     }
 327
 328     if (old_desktop) release_object( old_desktop );
 329 }
 330
 331 /* connect a process to its window station */
 332 void connect_process_winstation( struct process *process, struct thread *parent )
 333 {
 334     struct winstation *winstation = NULL;
 335     struct desktop *desktop = NULL;
 336     obj_handle_t handle;
 337
 338     /* check for an inherited winstation handle (don't ask...) */
 339     if ((handle = find_inherited_handle( process, &winstation_ops )))
 340     {
 341         winstation = (struct winstation *)get_handle_obj( process, handle, 0, &winstation_ops );
 342     }
 343     else if (parent && parent->process->winstation)
 344     {
 345         handle = duplicate_handle( parent->process, parent->process->winstation,
 346                                    process, 0, 0, DUP_HANDLE_SAME_ACCESS );
 347         winstation = (struct winstation *)get_handle_obj( process, handle, 0, &winstation_ops );
 348     }
 349     if (!winstation) goto done;
 350     process->winstation = handle;
 351
 352     if ((handle = find_inherited_handle( process, &desktop_ops )))
 353     {
 354         desktop = get_desktop_obj( process, handle, 0 );
 355         if (!desktop || desktop->winstation != winstation) goto done;
 356     }
 357     else if (parent && parent->desktop)
 358     {
 359         desktop = get_desktop_obj( parent->process, parent->desktop, 0 );
 360         if (!desktop || desktop->winstation != winstation) goto done;
 361         handle = duplicate_handle( parent->process, parent->desktop,
 362                                    process, 0, 0, DUP_HANDLE_SAME_ACCESS );
 363     }
 364
 365     if (handle) set_process_default_desktop( process, desktop, handle );
 366
 367 done:
 368     if (desktop) release_object( desktop );
 369     if (winstation) release_object( winstation );
 370     clear_error();
 371 }
 372
 373 static void close_desktop_timeout( void *private )
 374 {
 375     struct desktop *desktop = private;
 376
 377     desktop->close_timeout = NULL;
 378     unlink_named_object( &desktop->obj );  /* make sure no other process can open it */
 379     post_desktop_message( desktop, WM_CLOSE, 0, 0 );  /* and signal the owner to quit */
 380 }
 381
 382 /* close the desktop of a given process */
 383 void close_process_desktop( struct process *process )
 384 {
 385     struct desktop *desktop;
 386
 387     if (process->desktop && (desktop = get_desktop_obj( process, process->desktop, 0 )))
 388     {
 389         assert( desktop->users > 0 );
 390         desktop->users--;
 391         /* if we have one remaining user, it has to be the manager of the desktop window */
 392         if (desktop->users == 1 && get_top_window_owner( desktop ))
 393         {
 394             assert( !desktop->close_timeout );
 395             desktop->close_timeout = add_timeout_user( -TICKS_PER_SEC, close_desktop_timeout, desktop );
 396         }
 397         release_object( desktop );
 398     }
 399     clear_error();  /* ignore errors */
 400 }
 401
 402 /* close the desktop of a given thread */
 403 void close_thread_desktop( struct thread *thread )
 404 {
 405     obj_handle_t handle = thread->desktop;
 406
 407     thread->desktop = 0;
 408     if (handle) close_handle( thread->process, handle );
 409 }
 410
 411 /* set the reply data from the object name */
 412 static void set_reply_data_obj_name( struct object *obj )
 413 {
 414     data_size_t len;
 415     const WCHAR *ptr, *name = get_object_name( obj, &len );
 416
 417     /* if there is a backslash return the part of the name after it */
 418     if (name && (ptr = memchrW( name, '\\', len/sizeof(WCHAR) )))
 419     {
 420         len -= (ptr + 1 - name) * sizeof(WCHAR);
 421         name = ptr + 1;
 422     }
 423     if (name) set_reply_data( name, min( len, get_reply_max_size() ));
 424 }
 425
 426 /* create a window station */
 427 DECL_HANDLER(create_winstation)
 428 {
 429     struct winstation *winstation;
 430     struct unicode_str name;
 431
 432     reply->handle = 0;
 433     get_req_unicode_str( &name );
 434     if ((winstation = create_winstation( &name, req->attributes, req->flags )))
 435     {
 436         reply->handle = alloc_handle( current->process, winstation, req->access, req->attributes );
 437         release_object( winstation );
 438     }
 439 }
 440
 441 /* open a handle to a window station */
 442 DECL_HANDLER(open_winstation)
 443 {
 444     struct unicode_str name;
 445
 446     get_req_unicode_str( &name );
 447     if (winstation_namespace)
 448         reply->handle = open_object( winstation_namespace, &name, &winstation_ops, req->access,
 449                                      req->attributes );
 450     else
 451         set_error( STATUS_OBJECT_NAME_NOT_FOUND );
 452 }
 453
 454
 455 /* close a window station */
 456 DECL_HANDLER(close_winstation)
 457 {
 458     struct winstation *winstation;
 459
 460     if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle,
 461                                                            0, &winstation_ops )))
 462     {
 463         if (close_handle( current->process, req->handle )) set_error( STATUS_ACCESS_DENIED );
 464         release_object( winstation );
 465     }
 466 }
 467
 468
 469 /* get the process current window station */
 470 DECL_HANDLER(get_process_winstation)
 471 {
 472     reply->handle = current->process->winstation;
 473 }
 474
 475
 476 /* set the process current window station */
 477 DECL_HANDLER(set_process_winstation)
 478 {
 479     struct winstation *winstation;
 480
 481     if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle,
 482                                                            0, &winstation_ops )))
 483     {
 484         /* FIXME: should we close the old one? */
 485         current->process->winstation = req->handle;
 486         release_object( winstation );
 487     }
 488 }
 489
 490 /* create a desktop */
 491 DECL_HANDLER(create_desktop)
 492 {
 493     struct desktop *desktop;
 494     struct winstation *winstation;
 495     struct unicode_str name;
 496
 497     reply->handle = 0;
 498     get_req_unicode_str( &name );
 499     if ((winstation = get_process_winstation( current->process, WINSTA_CREATEDESKTOP )))
 500     {
 501         if ((desktop = create_desktop( &name, req->attributes, req->flags, winstation )))
 502         {
 503             reply->handle = alloc_handle( current->process, desktop, req->access, req->attributes );
 504             release_object( desktop );
 505         }
 506         release_object( winstation );
 507     }
 508 }
 509
 510 /* open a handle to a desktop */
 511 DECL_HANDLER(open_desktop)
 512 {
 513     struct winstation *winstation;
 514     struct unicode_str name;
 515
 516     get_req_unicode_str( &name );
 517
 518     /* FIXME: check access rights */
 519     if (!req->winsta)
 520         winstation = get_process_winstation( current->process, 0 );
 521     else
 522         winstation = (struct winstation *)get_handle_obj( current->process, req->winsta, 0, &winstation_ops );
 523
 524     if (winstation)
 525     {
 526         struct unicode_str full_str;
 527         WCHAR *full_name;
 528
 529         if ((full_name = build_desktop_name( &name, winstation, &full_str )))
 530         {
 531             reply->handle = open_object( winstation_namespace, &full_str, &desktop_ops, req->access,
 532                                          req->attributes );
 533             free( full_name );
 534         }
 535         release_object( winstation );
 536     }
 537 }
 538
 539
 540 /* close a desktop */
 541 DECL_HANDLER(close_desktop)
 542 {
 543     struct desktop *desktop;
 544
 545     /* make sure it is a desktop handle */
 546     if ((desktop = (struct desktop *)get_handle_obj( current->process, req->handle,
 547                                                      0, &desktop_ops )))
 548     {
 549         if (close_handle( current->process, req->handle )) set_error( STATUS_DEVICE_BUSY );
 550         release_object( desktop );
 551     }
 552 }
 553
 554
 555 /* get the thread current desktop */
 556 DECL_HANDLER(get_thread_desktop)
 557 {
 558     struct thread *thread;
 559
 560     if (!(thread = get_thread_from_id( req->tid ))) return;
 561     reply->handle = thread->desktop;
 562     release_object( thread );
 563 }
 564
 565
 566 /* set the thread current desktop */
 567 DECL_HANDLER(set_thread_desktop)
 568 {
 569     struct desktop *old_desktop, *new_desktop;
 570     struct winstation *winstation;
 571
 572     if (!(winstation = get_process_winstation( current->process, 0 /* FIXME: access rights? */ )))
 573         return;
 574
 575     if (!(new_desktop = get_desktop_obj( current->process, req->handle, 0 )))
 576     {
 577         release_object( winstation );
 578         return;
 579     }
 580     if (new_desktop->winstation != winstation)
 581     {
 582         set_error( STATUS_ACCESS_DENIED );
 583         release_object( new_desktop );
 584         release_object( winstation );
 585         return;
 586     }
 587
 588     /* check if we are changing to a new desktop */
 589
 590     if (!(old_desktop = get_desktop_obj( current->process, current->desktop, 0)))
 591         clear_error();  /* ignore error */
 592
 593     /* when changing desktop, we can't have any users on the current one */
 594     if (old_desktop != new_desktop && current->desktop_users > 0)
 595         set_error( STATUS_DEVICE_BUSY );
 596     else
 597         current->desktop = req->handle;  /* FIXME: should we close the old one? */
 598
 599     if (!current->process->desktop)
 600         set_process_default_desktop( current->process, new_desktop, req->handle );
 601
 602     if (old_desktop != new_desktop && current->queue) detach_thread_input( current );
 603
 604     if (old_desktop) release_object( old_desktop );
 605     release_object( new_desktop );
 606     release_object( winstation );
 607 }
 608
 609
 610 /* get/set information about a user object (window station or desktop) */
 611 DECL_HANDLER(set_user_object_info)
 612 {
 613     struct object *obj;
 614
 615     if (!(obj = get_handle_obj( current->process, req->handle, 0, NULL ))) return;
 616
 617     if (obj->ops == &desktop_ops)
 618     {
 619         struct desktop *desktop = (struct desktop *)obj;
 620         reply->is_desktop = 1;
 621         reply->old_obj_flags = desktop->flags;
 622         if (req->flags & SET_USER_OBJECT_FLAGS) desktop->flags = req->obj_flags;
 623     }
 624     else if (obj->ops == &winstation_ops)
 625     {
 626         struct winstation *winstation = (struct winstation *)obj;
 627         reply->is_desktop = 0;
 628         reply->old_obj_flags = winstation->flags;
 629         if (req->flags & SET_USER_OBJECT_FLAGS) winstation->flags = req->obj_flags;
 630     }
 631     else
 632     {
 633         set_error( STATUS_OBJECT_TYPE_MISMATCH );
 634         release_object( obj );
 635         return;
 636     }
 637     if (get_reply_max_size()) set_reply_data_obj_name( obj );
 638     release_object( obj );
 639 }
 640
 641
 642 /* enumerate window stations */
 643 DECL_HANDLER(enum_winstation)
 644 {
 645     unsigned int index = 0;
 646     struct winstation *winsta;
 647
 648     LIST_FOR_EACH_ENTRY( winsta, &winstation_list, struct winstation, entry )
 649     {
 650         unsigned int access = WINSTA_ENUMERATE;
 651         if (req->index > index++) continue;
 652         if (!check_object_access( &winsta->obj, &access )) continue;
 653         set_reply_data_obj_name( &winsta->obj );
 654         clear_error();
 655         reply->next = index;
 656         return;
 657     }
 658     set_error( STATUS_NO_MORE_ENTRIES );
 659 }
 660
 661
 662 /* enumerate desktops */
 663 DECL_HANDLER(enum_desktop)
 664 {
 665     struct winstation *winstation;
 666     struct desktop *desktop;
 667     unsigned int index = 0;
 668
 669     if (!(winstation = (struct winstation *)get_handle_obj( current->process, req->winstation,
 670                                                             WINSTA_ENUMDESKTOPS, &winstation_ops )))
 671         return;
 672
 673     LIST_FOR_EACH_ENTRY( desktop, &winstation->desktops, struct desktop, entry )
 674     {
 675         unsigned int access = DESKTOP_ENUMERATE;
 676         if (req->index > index++) continue;
 677         if (!desktop->obj.name) continue;
 678         if (!check_object_access( &desktop->obj, &access )) continue;
 679         set_reply_data_obj_name( &desktop->obj );
 680         release_object( winstation );
 681         clear_error();
 682         reply->next = index;
 683         return;
 684     }
 685
 686     release_object( winstation );
 687     set_error( STATUS_NO_MORE_ENTRIES );
 688 }