/* * Server-side window stations and desktops handling * * Copyright (C) 2002, 2005 Alexandre Julliard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include "wine/port.h" #include <stdio.h> #include <stdarg.h> #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winbase.h" #include "winuser.h" #include "winternl.h" #include "object.h" #include "handle.h" #include "request.h" #include "process.h" #include "user.h" #include "file.h" #include "security.h" #include "wine/unicode.h" static struct list winstation_list = LIST_INIT(winstation_list); static struct namespace *winstation_namespace; static void winstation_dump( struct object *obj, int verbose ); static struct object_type *winstation_get_type( struct object *obj ); static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle ); static void winstation_destroy( struct object *obj ); static unsigned int winstation_map_access( struct object *obj, unsigned int access ); static void desktop_dump( struct object *obj, int verbose ); static struct object_type *desktop_get_type( struct object *obj ); static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle ); static void desktop_destroy( struct object *obj ); static unsigned int desktop_map_access( struct object *obj, unsigned int access ); static const struct object_ops winstation_ops = { sizeof(struct winstation), /* size */ winstation_dump, /* dump */ winstation_get_type, /* get_type */ no_add_queue, /* add_queue */ NULL, /* remove_queue */ NULL, /* signaled */ NULL, /* satisfied */ no_signal, /* signal */ no_get_fd, /* get_fd */ winstation_map_access, /* map_access */ default_get_sd, /* get_sd */ default_set_sd, /* set_sd */ no_lookup_name, /* lookup_name */ no_open_file, /* open_file */ winstation_close_handle, /* close_handle */ winstation_destroy /* destroy */ }; static const struct object_ops desktop_ops = { sizeof(struct desktop), /* size */ desktop_dump, /* dump */ desktop_get_type, /* get_type */ no_add_queue, /* add_queue */ NULL, /* remove_queue */ NULL, /* signaled */ NULL, /* satisfied */ no_signal, /* signal */ no_get_fd, /* get_fd */ desktop_map_access, /* map_access */ default_get_sd, /* get_sd */ default_set_sd, /* set_sd */ no_lookup_name, /* lookup_name */ no_open_file, /* open_file */ desktop_close_handle, /* close_handle */ desktop_destroy /* destroy */ }; #define DESKTOP_ALL_ACCESS 0x01ff /* create a winstation object */ static struct winstation *create_winstation( const struct unicode_str *name, unsigned int attr, unsigned int flags ) { struct winstation *winstation; if (!winstation_namespace && !(winstation_namespace = create_namespace( 7 ))) return NULL; if (memchrW( name->str, '\\', name->len / sizeof(WCHAR) )) /* no backslash allowed in name */ { set_error( STATUS_INVALID_PARAMETER ); return NULL; } if ((winstation = create_named_object( winstation_namespace, &winstation_ops, name, attr ))) { if (get_error() != STATUS_OBJECT_NAME_EXISTS) { /* initialize it if it didn't already exist */ winstation->flags = flags; winstation->clipboard = NULL; winstation->atom_table = NULL; list_add_tail( &winstation_list, &winstation->entry ); list_init( &winstation->desktops ); } } return winstation; } static void winstation_dump( struct object *obj, int verbose ) { struct winstation *winstation = (struct winstation *)obj; fprintf( stderr, "Winstation flags=%x clipboard=%p atoms=%p ", winstation->flags, winstation->clipboard, winstation->atom_table ); dump_object_name( &winstation->obj ); fputc( '\n', stderr ); } static struct object_type *winstation_get_type( struct object *obj ) { static const WCHAR name[] = {'W','i','n','d','o','w','S','t','a','t','i','o','n'}; static const struct unicode_str str = { name, sizeof(name) }; return get_object_type( &str ); } static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle ) { return (process->winstation != handle); } static void winstation_destroy( struct object *obj ) { struct winstation *winstation = (struct winstation *)obj; list_remove( &winstation->entry ); if (winstation->clipboard) release_object( winstation->clipboard ); if (winstation->atom_table) release_object( winstation->atom_table ); } static unsigned int winstation_map_access( struct object *obj, unsigned int access ) { if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | WINSTA_ENUMDESKTOPS | WINSTA_READATTRIBUTES | WINSTA_ENUMERATE | WINSTA_READSCREEN; if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | WINSTA_ACCESSCLIPBOARD | WINSTA_CREATEDESKTOP | WINSTA_WRITEATTRIBUTES; if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | WINSTA_ACCESSGLOBALATOMS | WINSTA_EXITWINDOWS; if (access & GENERIC_ALL) access |= STANDARD_RIGHTS_REQUIRED | WINSTA_ALL_ACCESS; return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL); } /* retrieve the process window station, checking the handle access rights */ struct winstation *get_process_winstation( struct process *process, unsigned int access ) { return (struct winstation *)get_handle_obj( process, process->winstation, access, &winstation_ops ); } /* build the full name of a desktop object */ static WCHAR *build_desktop_name( const struct unicode_str *name, struct winstation *winstation, struct unicode_str *res ) { const WCHAR *winstation_name; WCHAR *full_name; data_size_t winstation_len; if (memchrW( name->str, '\\', name->len / sizeof(WCHAR) )) { set_error( STATUS_INVALID_PARAMETER ); return NULL; } if (!(winstation_name = get_object_name( &winstation->obj, &winstation_len ))) winstation_len = 0; res->len = winstation_len + name->len + sizeof(WCHAR); if (!(full_name = mem_alloc( res->len ))) return NULL; memcpy( full_name, winstation_name, winstation_len ); full_name[winstation_len / sizeof(WCHAR)] = '\\'; memcpy( full_name + winstation_len / sizeof(WCHAR) + 1, name->str, name->len ); res->str = full_name; return full_name; } /* retrieve a pointer to a desktop object */ struct desktop *get_desktop_obj( struct process *process, obj_handle_t handle, unsigned int access ) { return (struct desktop *)get_handle_obj( process, handle, access, &desktop_ops ); } /* create a desktop object */ static struct desktop *create_desktop( const struct unicode_str *name, unsigned int attr, unsigned int flags, struct winstation *winstation ) { struct desktop *desktop; struct unicode_str full_str; WCHAR *full_name; if (!(full_name = build_desktop_name( name, winstation, &full_str ))) return NULL; if ((desktop = create_named_object( winstation_namespace, &desktop_ops, &full_str, attr ))) { if (get_error() != STATUS_OBJECT_NAME_EXISTS) { /* initialize it if it didn't already exist */ desktop->flags = flags; desktop->winstation = (struct winstation *)grab_object( winstation ); desktop->top_window = NULL; desktop->msg_window = NULL; desktop->global_hooks = NULL; desktop->close_timeout = NULL; desktop->foreground_input = NULL; desktop->users = 0; memset( &desktop->cursor, 0, sizeof(desktop->cursor) ); memset( desktop->keystate, 0, sizeof(desktop->keystate) ); list_add_tail( &winstation->desktops, &desktop->entry ); list_init( &desktop->hotkeys ); } } free( full_name ); return desktop; } static void desktop_dump( struct object *obj, int verbose ) { struct desktop *desktop = (struct desktop *)obj; fprintf( stderr, "Desktop flags=%x winstation=%p top_win=%p hooks=%p ", desktop->flags, desktop->winstation, desktop->top_window, desktop->global_hooks ); dump_object_name( &desktop->obj ); fputc( '\n', stderr ); } static struct object_type *desktop_get_type( struct object *obj ) { static const WCHAR name[] = {'D','e','s','k','t','o','p'}; static const struct unicode_str str = { name, sizeof(name) }; return get_object_type( &str ); } static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle ) { struct thread *thread; /* check if the handle is currently used by the process or one of its threads */ if (process->desktop == handle) return 0; LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry ) if (thread->desktop == handle) return 0; return 1; } static void desktop_destroy( struct object *obj ) { struct desktop *desktop = (struct desktop *)obj; free_hotkeys( desktop, 0 ); if (desktop->top_window) destroy_window( desktop->top_window ); if (desktop->msg_window) destroy_window( desktop->msg_window ); if (desktop->global_hooks) release_object( desktop->global_hooks ); if (desktop->close_timeout) remove_timeout_user( desktop->close_timeout ); list_remove( &desktop->entry ); release_object( desktop->winstation ); } static unsigned int desktop_map_access( struct object *obj, unsigned int access ) { if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | DESKTOP_READOBJECTS | DESKTOP_ENUMERATE; if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW | DESKTOP_HOOKCONTROL | DESKTOP_JOURNALRECORD | DESKTOP_JOURNALPLAYBACK | DESKTOP_WRITEOBJECTS; if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | DESKTOP_SWITCHDESKTOP; if (access & GENERIC_ALL) access |= STANDARD_RIGHTS_REQUIRED | DESKTOP_ALL_ACCESS; return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL); } /* retrieve the thread desktop, checking the handle access rights */ struct desktop *get_thread_desktop( struct thread *thread, unsigned int access ) { return get_desktop_obj( thread->process, thread->desktop, access ); } static void close_desktop_timeout( void *private ) { struct desktop *desktop = private; desktop->close_timeout = NULL; unlink_named_object( &desktop->obj ); /* make sure no other process can open it */ post_desktop_message( desktop, WM_CLOSE, 0, 0 ); /* and signal the owner to quit */ } /* add a user of the desktop and cancel the close timeout */ static void add_desktop_user( struct desktop *desktop ) { desktop->users++; if (desktop->close_timeout) { remove_timeout_user( desktop->close_timeout ); desktop->close_timeout = NULL; } } /* remove a user of the desktop and start the close timeout if necessary */ static void remove_desktop_user( struct desktop *desktop ) { assert( desktop->users > 0 ); desktop->users--; /* if we have one remaining user, it has to be the manager of the desktop window */ if (desktop->users == 1 && get_top_window_owner( desktop )) { assert( !desktop->close_timeout ); desktop->close_timeout = add_timeout_user( -TICKS_PER_SEC, close_desktop_timeout, desktop ); } } /* set the process default desktop handle */ void set_process_default_desktop( struct process *process, struct desktop *desktop, obj_handle_t handle ) { struct thread *thread; struct desktop *old_desktop; if (process->desktop == handle) return; /* nothing to do */ if (!(old_desktop = get_desktop_obj( process, process->desktop, 0 ))) clear_error(); process->desktop = handle; /* set desktop for threads that don't have one yet */ LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry ) if (!thread->desktop) thread->desktop = handle; if (!process->is_system && desktop != old_desktop) { add_desktop_user( desktop ); if (old_desktop) remove_desktop_user( old_desktop ); } if (old_desktop) release_object( old_desktop ); } /* connect a process to its window station */ void connect_process_winstation( struct process *process, struct thread *parent ) { struct winstation *winstation = NULL; struct desktop *desktop = NULL; obj_handle_t handle; /* check for an inherited winstation handle (don't ask...) */ if ((handle = find_inherited_handle( process, &winstation_ops ))) { winstation = (struct winstation *)get_handle_obj( process, handle, 0, &winstation_ops ); } else if (parent && parent->process->winstation) { handle = duplicate_handle( parent->process, parent->process->winstation, process, 0, 0, DUP_HANDLE_SAME_ACCESS ); winstation = (struct winstation *)get_handle_obj( process, handle, 0, &winstation_ops ); } if (!winstation) goto done; process->winstation = handle; if ((handle = find_inherited_handle( process, &desktop_ops ))) { desktop = get_desktop_obj( process, handle, 0 ); if (!desktop || desktop->winstation != winstation) goto done; } else if (parent && parent->desktop) { desktop = get_desktop_obj( parent->process, parent->desktop, 0 ); if (!desktop || desktop->winstation != winstation) goto done; handle = duplicate_handle( parent->process, parent->desktop, process, 0, 0, DUP_HANDLE_SAME_ACCESS ); } if (handle) set_process_default_desktop( process, desktop, handle ); done: if (desktop) release_object( desktop ); if (winstation) release_object( winstation ); clear_error(); } /* close the desktop of a given process */ void close_process_desktop( struct process *process ) { struct desktop *desktop; if (process->desktop && (desktop = get_desktop_obj( process, process->desktop, 0 ))) { remove_desktop_user( desktop ); release_object( desktop ); } clear_error(); /* ignore errors */ } /* close the desktop of a given thread */ void close_thread_desktop( struct thread *thread ) { obj_handle_t handle = thread->desktop; thread->desktop = 0; if (handle) close_handle( thread->process, handle ); } /* set the reply data from the object name */ static void set_reply_data_obj_name( struct object *obj ) { data_size_t len; const WCHAR *ptr, *name = get_object_name( obj, &len ); /* if there is a backslash return the part of the name after it */ if (name && (ptr = memchrW( name, '\\', len/sizeof(WCHAR) ))) { len -= (ptr + 1 - name) * sizeof(WCHAR); name = ptr + 1; } if (name) set_reply_data( name, min( len, get_reply_max_size() )); } /* create a window station */ DECL_HANDLER(create_winstation) { struct winstation *winstation; struct unicode_str name; reply->handle = 0; get_req_unicode_str( &name ); if ((winstation = create_winstation( &name, req->attributes, req->flags ))) { reply->handle = alloc_handle( current->process, winstation, req->access, req->attributes ); release_object( winstation ); } } /* open a handle to a window station */ DECL_HANDLER(open_winstation) { struct unicode_str name; get_req_unicode_str( &name ); if (winstation_namespace) reply->handle = open_object( winstation_namespace, &name, &winstation_ops, req->access, req->attributes ); else set_error( STATUS_OBJECT_NAME_NOT_FOUND ); } /* close a window station */ DECL_HANDLER(close_winstation) { struct winstation *winstation; if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle, 0, &winstation_ops ))) { if (close_handle( current->process, req->handle )) set_error( STATUS_ACCESS_DENIED ); release_object( winstation ); } } /* get the process current window station */ DECL_HANDLER(get_process_winstation) { reply->handle = current->process->winstation; } /* set the process current window station */ DECL_HANDLER(set_process_winstation) { struct winstation *winstation; if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle, 0, &winstation_ops ))) { /* FIXME: should we close the old one? */ current->process->winstation = req->handle; release_object( winstation ); } } /* create a desktop */ DECL_HANDLER(create_desktop) { struct desktop *desktop; struct winstation *winstation; struct unicode_str name; reply->handle = 0; get_req_unicode_str( &name ); if ((winstation = get_process_winstation( current->process, WINSTA_CREATEDESKTOP ))) { if ((desktop = create_desktop( &name, req->attributes, req->flags, winstation ))) { reply->handle = alloc_handle( current->process, desktop, req->access, req->attributes ); release_object( desktop ); } release_object( winstation ); } } /* open a handle to a desktop */ DECL_HANDLER(open_desktop) { struct winstation *winstation; struct unicode_str name; get_req_unicode_str( &name ); /* FIXME: check access rights */ if (!req->winsta) winstation = get_process_winstation( current->process, 0 ); else winstation = (struct winstation *)get_handle_obj( current->process, req->winsta, 0, &winstation_ops ); if (winstation) { struct unicode_str full_str; WCHAR *full_name; if ((full_name = build_desktop_name( &name, winstation, &full_str ))) { reply->handle = open_object( winstation_namespace, &full_str, &desktop_ops, req->access, req->attributes ); free( full_name ); } release_object( winstation ); } } /* open a handle to current input desktop */ DECL_HANDLER(open_input_desktop) { /* FIXME: check access rights */ struct winstation *winstation = get_process_winstation( current->process, 0 ); struct desktop *desktop; if (!winstation) return; if (!(winstation->flags & WSF_VISIBLE)) { set_error( STATUS_ILLEGAL_FUNCTION ); release_object( winstation ); return; } if ((desktop = get_desktop_obj( current->process, current->process->desktop, 0 ))) { reply->handle = alloc_handle( current->process, desktop, req->access, req->attributes ); release_object( desktop ); } release_object( winstation ); } /* close a desktop */ DECL_HANDLER(close_desktop) { struct desktop *desktop; /* make sure it is a desktop handle */ if ((desktop = (struct desktop *)get_handle_obj( current->process, req->handle, 0, &desktop_ops ))) { if (close_handle( current->process, req->handle )) set_error( STATUS_DEVICE_BUSY ); release_object( desktop ); } } /* get the thread current desktop */ DECL_HANDLER(get_thread_desktop) { struct thread *thread; if (!(thread = get_thread_from_id( req->tid ))) return; reply->handle = thread->desktop; release_object( thread ); } /* set the thread current desktop */ DECL_HANDLER(set_thread_desktop) { struct desktop *old_desktop, *new_desktop; struct winstation *winstation; if (!(winstation = get_process_winstation( current->process, 0 /* FIXME: access rights? */ ))) return; if (!(new_desktop = get_desktop_obj( current->process, req->handle, 0 ))) { release_object( winstation ); return; } if (new_desktop->winstation != winstation) { set_error( STATUS_ACCESS_DENIED ); release_object( new_desktop ); release_object( winstation ); return; } /* check if we are changing to a new desktop */ if (!(old_desktop = get_desktop_obj( current->process, current->desktop, 0))) clear_error(); /* ignore error */ /* when changing desktop, we can't have any users on the current one */ if (old_desktop != new_desktop && current->desktop_users > 0) set_error( STATUS_DEVICE_BUSY ); else current->desktop = req->handle; /* FIXME: should we close the old one? */ if (!current->process->desktop) set_process_default_desktop( current->process, new_desktop, req->handle ); if (old_desktop != new_desktop && current->queue) detach_thread_input( current ); if (old_desktop) release_object( old_desktop ); release_object( new_desktop ); release_object( winstation ); } /* get/set information about a user object (window station or desktop) */ DECL_HANDLER(set_user_object_info) { struct object *obj; if (!(obj = get_handle_obj( current->process, req->handle, 0, NULL ))) return; if (obj->ops == &desktop_ops) { struct desktop *desktop = (struct desktop *)obj; reply->is_desktop = 1; reply->old_obj_flags = desktop->flags; if (req->flags & SET_USER_OBJECT_FLAGS) desktop->flags = req->obj_flags; } else if (obj->ops == &winstation_ops) { struct winstation *winstation = (struct winstation *)obj; reply->is_desktop = 0; reply->old_obj_flags = winstation->flags; if (req->flags & SET_USER_OBJECT_FLAGS) winstation->flags = req->obj_flags; } else { set_error( STATUS_OBJECT_TYPE_MISMATCH ); release_object( obj ); return; } if (get_reply_max_size()) set_reply_data_obj_name( obj ); release_object( obj ); } /* enumerate window stations */ DECL_HANDLER(enum_winstation) { unsigned int index = 0; struct winstation *winsta; LIST_FOR_EACH_ENTRY( winsta, &winstation_list, struct winstation, entry ) { unsigned int access = WINSTA_ENUMERATE; if (req->index > index++) continue; if (!check_object_access( &winsta->obj, &access )) continue; set_reply_data_obj_name( &winsta->obj ); clear_error(); reply->next = index; return; } set_error( STATUS_NO_MORE_ENTRIES ); } /* enumerate desktops */ DECL_HANDLER(enum_desktop) { struct winstation *winstation; struct desktop *desktop; unsigned int index = 0; if (!(winstation = (struct winstation *)get_handle_obj( current->process, req->winstation, WINSTA_ENUMDESKTOPS, &winstation_ops ))) return; LIST_FOR_EACH_ENTRY( desktop, &winstation->desktops, struct desktop, entry ) { unsigned int access = DESKTOP_ENUMERATE; if (req->index > index++) continue; if (!desktop->obj.name) continue; if (!check_object_access( &desktop->obj, &access )) continue; set_reply_data_obj_name( &desktop->obj ); release_object( winstation ); clear_error(); reply->next = index; return; } release_object( winstation ); set_error( STATUS_NO_MORE_ENTRIES ); }