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[wine.git] / server / winstation.c
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1 /*
2 * Server-side window stations and desktops handling
4 * Copyright (C) 2002, 2005 Alexandre Julliard
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.
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.
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
21 #include "config.h"
22 #include "wine/port.h"
24 #include <stdio.h>
25 #include <stdarg.h>
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"
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 "wine/unicode.h"
43 static struct list winstation_list = LIST_INIT(winstation_list);
44 static struct namespace *winstation_namespace;
46 static void winstation_dump( struct object *obj, int verbose );
47 static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
48 static void winstation_destroy( struct object *obj );
49 static void desktop_dump( struct object *obj, int verbose );
50 static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
51 static void desktop_destroy( struct object *obj );
53 static const struct object_ops winstation_ops =
55 sizeof(struct winstation), /* size */
56 winstation_dump, /* dump */
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 no_lookup_name, /* lookup_name */
65 winstation_close_handle, /* close_handle */
66 winstation_destroy /* destroy */
70 static const struct object_ops desktop_ops =
72 sizeof(struct desktop), /* size */
73 desktop_dump, /* dump */
74 no_add_queue, /* add_queue */
75 NULL, /* remove_queue */
76 NULL, /* signaled */
77 NULL, /* satisfied */
78 no_signal, /* signal */
79 no_get_fd, /* get_fd */
80 no_map_access, /* map_access */
81 no_lookup_name, /* lookup_name */
82 desktop_close_handle, /* close_handle */
83 desktop_destroy /* destroy */
86 #define DESKTOP_ALL_ACCESS 0x01ff
88 /* create a winstation object */
89 static struct winstation *create_winstation( const struct unicode_str *name, unsigned int attr,
90 unsigned int flags )
92 struct winstation *winstation;
94 if (!winstation_namespace && !(winstation_namespace = create_namespace( 7 )))
95 return NULL;
97 if (memchrW( name->str, '\\', name->len / sizeof(WCHAR) )) /* no backslash allowed in name */
99 set_error( STATUS_INVALID_PARAMETER );
100 return NULL;
103 if ((winstation = create_named_object( winstation_namespace, &winstation_ops, name, attr )))
105 if (get_error() != STATUS_OBJECT_NAME_EXISTS)
107 /* initialize it if it didn't already exist */
108 winstation->flags = flags;
109 winstation->clipboard = NULL;
110 winstation->atom_table = NULL;
111 list_add_tail( &winstation_list, &winstation->entry );
112 list_init( &winstation->desktops );
115 return winstation;
118 static void winstation_dump( struct object *obj, int verbose )
120 struct winstation *winstation = (struct winstation *)obj;
122 fprintf( stderr, "Winstation flags=%x clipboard=%p atoms=%p ",
123 winstation->flags, winstation->clipboard, winstation->atom_table );
124 dump_object_name( &winstation->obj );
125 fputc( '\n', stderr );
128 static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
130 return (process->winstation != handle);
133 static void winstation_destroy( struct object *obj )
135 struct winstation *winstation = (struct winstation *)obj;
137 list_remove( &winstation->entry );
138 if (winstation->clipboard) release_object( winstation->clipboard );
139 if (winstation->atom_table) release_object( winstation->atom_table );
142 /* retrieve the process window station, checking the handle access rights */
143 struct winstation *get_process_winstation( struct process *process, unsigned int access )
145 return (struct winstation *)get_handle_obj( process, process->winstation,
146 access, &winstation_ops );
149 /* build the full name of a desktop object */
150 static WCHAR *build_desktop_name( const struct unicode_str *name,
151 struct winstation *winstation, struct unicode_str *res )
153 const WCHAR *winstation_name;
154 WCHAR *full_name;
155 data_size_t winstation_len;
157 if (memchrW( name->str, '\\', name->len / sizeof(WCHAR) ))
159 set_error( STATUS_INVALID_PARAMETER );
160 return NULL;
163 if (!(winstation_name = get_object_name( &winstation->obj, &winstation_len )))
164 winstation_len = 0;
166 res->len = winstation_len + name->len + sizeof(WCHAR);
167 if (!(full_name = mem_alloc( res->len ))) return NULL;
168 memcpy( full_name, winstation_name, winstation_len );
169 full_name[winstation_len / sizeof(WCHAR)] = '\\';
170 memcpy( full_name + winstation_len / sizeof(WCHAR) + 1, name->str, name->len );
171 res->str = full_name;
172 return full_name;
175 /* retrieve a pointer to a desktop object */
176 inline static struct desktop *get_desktop_obj( struct process *process, obj_handle_t handle,
177 unsigned int access )
179 return (struct desktop *)get_handle_obj( process, handle, access, &desktop_ops );
182 /* create a desktop object */
183 static struct desktop *create_desktop( const struct unicode_str *name, unsigned int attr,
184 unsigned int flags, struct winstation *winstation )
186 struct desktop *desktop;
187 struct unicode_str full_str;
188 WCHAR *full_name;
190 if (!(full_name = build_desktop_name( name, winstation, &full_str ))) return NULL;
192 if ((desktop = create_named_object( winstation_namespace, &desktop_ops, &full_str, attr )))
194 if (get_error() != STATUS_OBJECT_NAME_EXISTS)
196 /* initialize it if it didn't already exist */
197 desktop->flags = flags;
198 desktop->winstation = (struct winstation *)grab_object( winstation );
199 desktop->top_window = NULL;
200 desktop->global_hooks = NULL;
201 desktop->close_timeout = NULL;
202 desktop->users = 0;
203 list_add_tail( &winstation->desktops, &desktop->entry );
206 free( full_name );
207 return desktop;
210 static void desktop_dump( struct object *obj, int verbose )
212 struct desktop *desktop = (struct desktop *)obj;
214 fprintf( stderr, "Desktop flags=%x winstation=%p top_win=%p hooks=%p ",
215 desktop->flags, desktop->winstation, desktop->top_window, desktop->global_hooks );
216 dump_object_name( &desktop->obj );
217 fputc( '\n', stderr );
220 static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
222 struct thread *thread;
224 /* check if the handle is currently used by the process or one of its threads */
225 if (process->desktop == handle) return 0;
226 LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
227 if (thread->desktop == handle) return 0;
228 return 1;
231 static void desktop_destroy( struct object *obj )
233 struct desktop *desktop = (struct desktop *)obj;
235 if (desktop->top_window) destroy_window( desktop->top_window );
236 if (desktop->global_hooks) release_object( desktop->global_hooks );
237 if (desktop->close_timeout) remove_timeout_user( desktop->close_timeout );
238 list_remove( &desktop->entry );
239 release_object( desktop->winstation );
242 /* retrieve the thread desktop, checking the handle access rights */
243 struct desktop *get_thread_desktop( struct thread *thread, unsigned int access )
245 return get_desktop_obj( thread->process, thread->desktop, access );
248 /* set the process default desktop handle */
249 void set_process_default_desktop( struct process *process, struct desktop *desktop,
250 obj_handle_t handle )
252 struct thread *thread;
253 struct desktop *old_desktop;
255 if (process->desktop == handle) return; /* nothing to do */
257 if (!(old_desktop = get_desktop_obj( process, process->desktop, 0 ))) clear_error();
258 process->desktop = handle;
260 /* set desktop for threads that don't have one yet */
261 LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
262 if (!thread->desktop) thread->desktop = handle;
264 desktop->users++;
265 if (desktop->close_timeout)
267 remove_timeout_user( desktop->close_timeout );
268 desktop->close_timeout = NULL;
270 if (old_desktop)
272 old_desktop->users--;
273 release_object( old_desktop );
277 /* connect a process to its window station */
278 void connect_process_winstation( struct process *process, struct thread *parent )
280 struct winstation *winstation = NULL;
281 struct desktop *desktop = NULL;
282 obj_handle_t handle;
284 /* check for an inherited winstation handle (don't ask...) */
285 if ((handle = find_inherited_handle( process, &winstation_ops )))
287 winstation = (struct winstation *)get_handle_obj( process, handle, 0, &winstation_ops );
289 else if (parent && parent->process->winstation)
291 handle = duplicate_handle( parent->process, parent->process->winstation,
292 process, 0, 0, DUP_HANDLE_SAME_ACCESS );
293 winstation = (struct winstation *)get_handle_obj( process, handle, 0, &winstation_ops );
295 if (!winstation) goto done;
296 process->winstation = handle;
298 if ((handle = find_inherited_handle( process, &desktop_ops )))
300 desktop = get_desktop_obj( process, handle, 0 );
301 if (!desktop || desktop->winstation != winstation) goto done;
303 else if (parent && parent->desktop)
305 desktop = get_desktop_obj( parent->process, parent->desktop, 0 );
306 if (!desktop || desktop->winstation != winstation) goto done;
307 handle = duplicate_handle( parent->process, parent->desktop,
308 process, 0, 0, DUP_HANDLE_SAME_ACCESS );
311 if (handle) set_process_default_desktop( process, desktop, handle );
313 done:
314 if (desktop) release_object( desktop );
315 if (winstation) release_object( winstation );
316 clear_error();
319 static void close_desktop_timeout( void *private )
321 struct desktop *desktop = private;
323 desktop->close_timeout = NULL;
324 unlink_named_object( &desktop->obj ); /* make sure no other process can open it */
325 close_desktop_window( desktop ); /* and signal the owner to quit */
328 /* close the desktop of a given process */
329 void close_process_desktop( struct process *process )
331 struct desktop *desktop;
333 if (process->desktop && (desktop = get_desktop_obj( process, process->desktop, 0 )))
335 assert( desktop->users > 0 );
336 desktop->users--;
337 /* if we have one remaining user, it has to be the manager of the desktop window */
338 if (desktop->users == 1 && get_top_window_owner( desktop ))
340 struct timeval when = current_time;
341 add_timeout( &when, 1000 );
342 assert( !desktop->close_timeout );
343 desktop->close_timeout = add_timeout_user( &when, close_desktop_timeout, desktop );
345 release_object( desktop );
347 clear_error(); /* ignore errors */
350 /* close the desktop of a given thread */
351 void close_thread_desktop( struct thread *thread )
353 obj_handle_t handle = thread->desktop;
355 thread->desktop = 0;
356 if (handle) close_handle( thread->process, handle, NULL );
357 clear_error(); /* ignore errors */
361 /* create a window station */
362 DECL_HANDLER(create_winstation)
364 struct winstation *winstation;
365 struct unicode_str name;
367 reply->handle = 0;
368 get_req_unicode_str( &name );
369 if ((winstation = create_winstation( &name, req->attributes, req->flags )))
371 reply->handle = alloc_handle( current->process, winstation, req->access, req->attributes );
372 release_object( winstation );
376 /* open a handle to a window station */
377 DECL_HANDLER(open_winstation)
379 struct unicode_str name;
381 get_req_unicode_str( &name );
382 if (winstation_namespace)
383 reply->handle = open_object( winstation_namespace, &name, &winstation_ops, req->access,
384 req->attributes );
385 else
386 set_error( STATUS_OBJECT_NAME_NOT_FOUND );
390 /* close a window station */
391 DECL_HANDLER(close_winstation)
393 struct winstation *winstation;
395 if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle,
396 0, &winstation_ops )))
398 if (!close_handle( current->process, req->handle, NULL )) set_error( STATUS_ACCESS_DENIED );
399 release_object( winstation );
404 /* get the process current window station */
405 DECL_HANDLER(get_process_winstation)
407 reply->handle = current->process->winstation;
411 /* set the process current window station */
412 DECL_HANDLER(set_process_winstation)
414 struct winstation *winstation;
416 if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle,
417 0, &winstation_ops )))
419 /* FIXME: should we close the old one? */
420 current->process->winstation = req->handle;
421 release_object( winstation );
425 /* create a desktop */
426 DECL_HANDLER(create_desktop)
428 struct desktop *desktop;
429 struct winstation *winstation;
430 struct unicode_str name;
432 reply->handle = 0;
433 get_req_unicode_str( &name );
434 if ((winstation = get_process_winstation( current->process, WINSTA_CREATEDESKTOP )))
436 if ((desktop = create_desktop( &name, req->attributes, req->flags, winstation )))
438 reply->handle = alloc_handle( current->process, desktop, req->access, req->attributes );
439 release_object( desktop );
441 release_object( winstation );
445 /* open a handle to a desktop */
446 DECL_HANDLER(open_desktop)
448 struct winstation *winstation;
449 struct unicode_str name;
451 get_req_unicode_str( &name );
452 if ((winstation = get_process_winstation( current->process, 0 /* FIXME: access rights? */ )))
454 struct unicode_str full_str;
455 WCHAR *full_name;
457 if ((full_name = build_desktop_name( &name, winstation, &full_str )))
459 reply->handle = open_object( winstation_namespace, &full_str, &desktop_ops, req->access,
460 req->attributes );
461 free( full_name );
463 release_object( winstation );
468 /* close a desktop */
469 DECL_HANDLER(close_desktop)
471 struct desktop *desktop;
473 /* make sure it is a desktop handle */
474 if ((desktop = (struct desktop *)get_handle_obj( current->process, req->handle,
475 0, &desktop_ops )))
477 if (!close_handle( current->process, req->handle, NULL )) set_error( STATUS_DEVICE_BUSY );
478 release_object( desktop );
483 /* get the thread current desktop */
484 DECL_HANDLER(get_thread_desktop)
486 struct thread *thread;
488 if (!(thread = get_thread_from_id( req->tid ))) return;
489 reply->handle = thread->desktop;
490 release_object( thread );
494 /* set the thread current desktop */
495 DECL_HANDLER(set_thread_desktop)
497 struct desktop *old_desktop, *new_desktop;
498 struct winstation *winstation;
500 if (!(winstation = get_process_winstation( current->process, 0 /* FIXME: access rights? */ )))
501 return;
503 if (!(new_desktop = get_desktop_obj( current->process, req->handle, 0 )))
505 release_object( winstation );
506 return;
508 if (new_desktop->winstation != winstation)
510 set_error( STATUS_ACCESS_DENIED );
511 release_object( new_desktop );
512 release_object( winstation );
513 return;
516 /* check if we are changing to a new desktop */
518 if (!(old_desktop = get_desktop_obj( current->process, current->desktop, 0)))
519 clear_error(); /* ignore error */
521 /* when changing desktop, we can't have any users on the current one */
522 if (old_desktop != new_desktop && current->desktop_users > 0)
523 set_error( STATUS_DEVICE_BUSY );
524 else
525 current->desktop = req->handle; /* FIXME: should we close the old one? */
527 if (!current->process->desktop)
528 set_process_default_desktop( current->process, new_desktop, req->handle );
530 if (old_desktop != new_desktop && current->queue) detach_thread_input( current );
532 if (old_desktop) release_object( old_desktop );
533 release_object( new_desktop );
534 release_object( winstation );
538 /* get/set information about a user object (window station or desktop) */
539 DECL_HANDLER(set_user_object_info)
541 struct object *obj;
543 if (!(obj = get_handle_obj( current->process, req->handle, 0, NULL ))) return;
545 if (obj->ops == &desktop_ops)
547 struct desktop *desktop = (struct desktop *)obj;
548 reply->is_desktop = 1;
549 reply->old_obj_flags = desktop->flags;
550 if (req->flags & SET_USER_OBJECT_FLAGS) desktop->flags = req->obj_flags;
552 else if (obj->ops == &winstation_ops)
554 struct winstation *winstation = (struct winstation *)obj;
555 reply->is_desktop = 0;
556 reply->old_obj_flags = winstation->flags;
557 if (req->flags & SET_USER_OBJECT_FLAGS) winstation->flags = req->obj_flags;
559 else
561 set_error( STATUS_OBJECT_TYPE_MISMATCH );
562 release_object( obj );
563 return;
565 if (get_reply_max_size())
567 data_size_t len;
568 const WCHAR *ptr, *name = get_object_name( obj, &len );
570 /* if there is a backslash return the part of the name after it */
571 if (name && (ptr = memchrW( name, '\\', len )))
573 len -= (ptr + 1 - name) * sizeof(WCHAR);
574 name = ptr + 1;
576 if (name) set_reply_data( name, min( len, get_reply_max_size() ));
578 release_object( obj );