521 lines
17 KiB
C
521 lines
17 KiB
C
/*
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* Server-side window stations and desktops handling
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*
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* Copyright (C) 2002, 2005 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winuser.h"
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#include "winternl.h"
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#include "object.h"
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#include "handle.h"
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#include "request.h"
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#include "process.h"
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#include "user.h"
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#include "wine/unicode.h"
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static struct list winstation_list = LIST_INIT(winstation_list);
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static struct winstation *interactive_winstation;
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static struct namespace *winstation_namespace;
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static void winstation_dump( struct object *obj, int verbose );
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static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
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static void winstation_destroy( struct object *obj );
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static void desktop_dump( struct object *obj, int verbose );
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static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
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static void desktop_destroy( struct object *obj );
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static const struct object_ops winstation_ops =
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{
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sizeof(struct winstation), /* size */
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winstation_dump, /* dump */
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no_add_queue, /* add_queue */
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NULL, /* remove_queue */
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NULL, /* signaled */
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NULL, /* satisfied */
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no_signal, /* signal */
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no_get_fd, /* get_fd */
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winstation_close_handle, /* close_handle */
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winstation_destroy /* destroy */
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};
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static const struct object_ops desktop_ops =
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{
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sizeof(struct desktop), /* size */
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desktop_dump, /* dump */
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no_add_queue, /* add_queue */
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NULL, /* remove_queue */
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NULL, /* signaled */
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NULL, /* satisfied */
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no_signal, /* signal */
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no_get_fd, /* get_fd */
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desktop_close_handle, /* close_handle */
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desktop_destroy /* destroy */
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};
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#define DESKTOP_ALL_ACCESS 0x01ff
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/* create a winstation object */
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static struct winstation *create_winstation( const WCHAR *name, size_t len, unsigned int flags )
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{
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struct winstation *winstation;
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if (!winstation_namespace && !(winstation_namespace = create_namespace( 7 )))
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return NULL;
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if (memchrW( name, '\\', len / sizeof(WCHAR) )) /* no backslash allowed in name */
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{
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set_error( STATUS_INVALID_PARAMETER );
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return NULL;
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}
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if ((winstation = create_named_object( winstation_namespace, &winstation_ops, name, len,
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OBJ_CASE_INSENSITIVE )))
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{
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if (get_error() != STATUS_OBJECT_NAME_COLLISION)
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{
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/* initialize it if it didn't already exist */
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winstation->flags = flags;
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winstation->clipboard = NULL;
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winstation->atom_table = NULL;
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list_add_tail( &winstation_list, &winstation->entry );
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list_init( &winstation->desktops );
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}
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}
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return winstation;
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}
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static void winstation_dump( struct object *obj, int verbose )
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{
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struct winstation *winstation = (struct winstation *)obj;
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fprintf( stderr, "Winstation flags=%x clipboard=%p atoms=%p ",
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winstation->flags, winstation->clipboard, winstation->atom_table );
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dump_object_name( &winstation->obj );
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fputc( '\n', stderr );
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}
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static int winstation_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
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{
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return (process->winstation != handle);
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}
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static void winstation_destroy( struct object *obj )
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{
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struct winstation *winstation = (struct winstation *)obj;
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if (winstation == interactive_winstation) interactive_winstation = NULL;
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list_remove( &winstation->entry );
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if (winstation->clipboard) release_object( winstation->clipboard );
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if (winstation->atom_table) release_object( winstation->atom_table );
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}
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/* retrieve the process window station, checking the handle access rights */
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struct winstation *get_process_winstation( struct process *process, unsigned int access )
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{
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return (struct winstation *)get_handle_obj( process, process->winstation,
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access, &winstation_ops );
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}
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/* build the full name of a desktop object */
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static WCHAR *build_desktop_name( const WCHAR *name, size_t len,
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struct winstation *winstation, size_t *res_len )
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{
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const WCHAR *winstation_name;
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WCHAR *full_name;
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size_t winstation_len;
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if (memchrW( name, '\\', len / sizeof(WCHAR) ))
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{
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set_error( STATUS_INVALID_PARAMETER );
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return NULL;
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}
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if (!(winstation_name = get_object_name( &winstation->obj, &winstation_len )))
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winstation_len = 0;
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*res_len = winstation_len + len + sizeof(WCHAR);
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if (!(full_name = mem_alloc( *res_len ))) return NULL;
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memcpy( full_name, winstation_name, winstation_len );
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full_name[winstation_len / sizeof(WCHAR)] = '\\';
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memcpy( full_name + winstation_len / sizeof(WCHAR) + 1, name, len );
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return full_name;
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}
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/* retrieve a pointer to a desktop object */
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inline static struct desktop *get_desktop_obj( struct process *process, obj_handle_t handle,
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unsigned int access )
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{
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return (struct desktop *)get_handle_obj( process, handle, access, &desktop_ops );
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}
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/* create a desktop object */
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static struct desktop *create_desktop( const WCHAR *name, size_t len, unsigned int flags,
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struct winstation *winstation )
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{
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struct desktop *desktop;
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WCHAR *full_name;
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size_t full_len;
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if (!(full_name = build_desktop_name( name, len, winstation, &full_len ))) return NULL;
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if ((desktop = create_named_object( winstation_namespace, &desktop_ops, full_name, full_len,
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OBJ_CASE_INSENSITIVE )))
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{
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if (get_error() != STATUS_OBJECT_NAME_COLLISION)
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{
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/* initialize it if it didn't already exist */
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desktop->flags = flags;
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desktop->winstation = (struct winstation *)grab_object( winstation );
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desktop->top_window = NULL;
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desktop->global_hooks = NULL;
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list_add_tail( &winstation->desktops, &desktop->entry );
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}
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}
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free( full_name );
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return desktop;
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}
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static void desktop_dump( struct object *obj, int verbose )
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{
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struct desktop *desktop = (struct desktop *)obj;
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fprintf( stderr, "Desktop flags=%x winstation=%p top_win=%p hooks=%p ",
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desktop->flags, desktop->winstation, desktop->top_window, desktop->global_hooks );
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dump_object_name( &desktop->obj );
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fputc( '\n', stderr );
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}
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static int desktop_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
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{
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struct thread *thread;
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/* check if the handle is currently used by the process or one of its threads */
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if (process->desktop == handle) return 0;
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LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
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if (thread->desktop == handle) return 0;
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return 1;
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}
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static void desktop_destroy( struct object *obj )
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{
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struct desktop *desktop = (struct desktop *)obj;
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if (desktop->top_window) destroy_window( desktop->top_window );
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if (desktop->global_hooks) release_object( desktop->global_hooks );
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list_remove( &desktop->entry );
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release_object( desktop->winstation );
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}
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/* retrieve the thread desktop, checking the handle access rights */
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struct desktop *get_thread_desktop( struct thread *thread, unsigned int access )
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{
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return get_desktop_obj( thread->process, thread->desktop, access );
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}
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/* connect a process to its window station */
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void connect_process_winstation( struct process *process, const WCHAR *name, size_t len )
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{
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struct winstation *winstation;
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if (process->winstation) return; /* already has one */
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/* check for an inherited winstation handle (don't ask...) */
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if ((process->winstation = find_inherited_handle( process, &winstation_ops )) != 0) return;
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if (name)
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{
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winstation = create_winstation( name, len, 0 );
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}
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else
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{
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if (!interactive_winstation)
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{
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static const WCHAR winsta0W[] = {'W','i','n','S','t','a','0'};
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interactive_winstation = create_winstation( winsta0W, sizeof(winsta0W), 0 );
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winstation = interactive_winstation;
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}
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else winstation = (struct winstation *)grab_object( interactive_winstation );
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}
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if (winstation)
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{
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process->winstation = alloc_handle( process, winstation, WINSTA_ALL_ACCESS, FALSE );
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release_object( winstation );
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}
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clear_error(); /* ignore errors */
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}
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/* connect a process to its main desktop */
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void connect_process_desktop( struct process *process, const WCHAR *name, size_t len )
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{
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struct desktop *desktop;
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struct winstation *winstation;
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if (process->desktop) return; /* already has one */
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if ((winstation = get_process_winstation( process, WINSTA_CREATEDESKTOP )))
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{
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static const WCHAR defaultW[] = {'D','e','f','a','u','l','t'};
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if (!name)
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{
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name = defaultW;
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len = sizeof(defaultW);
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}
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if ((desktop = create_desktop( name, len, 0, winstation )))
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{
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process->desktop = alloc_handle( process, desktop, DESKTOP_ALL_ACCESS, FALSE );
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release_object( desktop );
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}
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release_object( winstation );
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}
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clear_error(); /* ignore errors */
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}
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/* close the desktop of a given thread */
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void close_thread_desktop( struct thread *thread )
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{
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obj_handle_t handle = thread->desktop;
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thread->desktop = 0;
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if (handle) close_handle( thread->process, handle, NULL );
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clear_error(); /* ignore errors */
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}
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/* create a window station */
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DECL_HANDLER(create_winstation)
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{
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struct winstation *winstation;
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reply->handle = 0;
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if ((winstation = create_winstation( get_req_data(), get_req_data_size(), req->flags )))
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{
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reply->handle = alloc_handle( current->process, winstation, req->access, req->inherit );
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release_object( winstation );
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}
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}
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/* open a handle to a window station */
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DECL_HANDLER(open_winstation)
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{
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if (winstation_namespace)
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reply->handle = open_object( winstation_namespace, get_req_data(), get_req_data_size(),
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&winstation_ops, req->access,
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OBJ_CASE_INSENSITIVE | (req->inherit ? OBJ_INHERIT:0) );
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else
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set_error( STATUS_OBJECT_NAME_NOT_FOUND );
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}
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/* close a window station */
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DECL_HANDLER(close_winstation)
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{
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struct winstation *winstation;
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if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle,
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0, &winstation_ops )))
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{
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if (!close_handle( current->process, req->handle, NULL )) set_error( STATUS_ACCESS_DENIED );
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release_object( winstation );
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}
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}
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/* get the process current window station */
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DECL_HANDLER(get_process_winstation)
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{
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reply->handle = current->process->winstation;
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}
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/* set the process current window station */
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DECL_HANDLER(set_process_winstation)
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{
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struct winstation *winstation;
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if ((winstation = (struct winstation *)get_handle_obj( current->process, req->handle,
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0, &winstation_ops )))
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{
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/* FIXME: should we close the old one? */
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current->process->winstation = req->handle;
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release_object( winstation );
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}
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}
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/* create a desktop */
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DECL_HANDLER(create_desktop)
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{
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struct desktop *desktop;
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struct winstation *winstation;
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reply->handle = 0;
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if ((winstation = get_process_winstation( current->process, WINSTA_CREATEDESKTOP )))
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{
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if ((desktop = create_desktop( get_req_data(), get_req_data_size(),
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req->flags, winstation )))
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{
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reply->handle = alloc_handle( current->process, desktop, req->access, req->inherit );
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release_object( desktop );
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}
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release_object( winstation );
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}
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}
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/* open a handle to a desktop */
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DECL_HANDLER(open_desktop)
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{
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struct winstation *winstation;
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if ((winstation = get_process_winstation( current->process, 0 /* FIXME: access rights? */ )))
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{
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size_t full_len;
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WCHAR *full_name;
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if ((full_name = build_desktop_name( get_req_data(), get_req_data_size(),
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winstation, &full_len )))
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{
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reply->handle = open_object( winstation_namespace, full_name, full_len,
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&desktop_ops, req->access,
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OBJ_CASE_INSENSITIVE | (req->inherit ? OBJ_INHERIT:0) );
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free( full_name );
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}
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release_object( winstation );
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}
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}
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/* close a desktop */
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DECL_HANDLER(close_desktop)
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{
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struct desktop *desktop;
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/* make sure it is a desktop handle */
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if ((desktop = (struct desktop *)get_handle_obj( current->process, req->handle,
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0, &desktop_ops )))
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{
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if (!close_handle( current->process, req->handle, NULL )) set_error( STATUS_DEVICE_BUSY );
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release_object( desktop );
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}
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}
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/* get the thread current desktop */
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DECL_HANDLER(get_thread_desktop)
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{
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struct thread *thread;
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if (!(thread = get_thread_from_id( req->tid ))) return;
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reply->handle = thread->desktop;
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release_object( thread );
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}
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/* set the thread current desktop */
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DECL_HANDLER(set_thread_desktop)
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{
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struct desktop *old_desktop, *new_desktop;
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struct winstation *winstation;
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if (!(winstation = get_process_winstation( current->process, 0 /* FIXME: access rights? */ )))
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return;
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if (!(new_desktop = get_desktop_obj( current->process, req->handle, 0 )))
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{
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release_object( winstation );
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return;
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}
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if (new_desktop->winstation != winstation)
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{
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set_error( STATUS_ACCESS_DENIED );
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release_object( new_desktop );
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release_object( winstation );
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return;
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}
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/* check if we are changing to a new desktop */
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if (!(old_desktop = get_desktop_obj( current->process, current->desktop, 0)))
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clear_error(); /* ignore error */
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/* when changing desktop, we can't have any users on the current one */
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if (old_desktop != new_desktop && current->desktop_users > 0)
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set_error( STATUS_DEVICE_BUSY );
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else
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current->desktop = req->handle; /* FIXME: should we close the old one? */
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if (old_desktop != new_desktop) detach_thread_input( current );
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if (old_desktop) release_object( old_desktop );
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release_object( new_desktop );
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release_object( winstation );
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}
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/* get/set information about a user object (window station or desktop) */
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DECL_HANDLER(set_user_object_info)
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{
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struct object *obj;
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if (!(obj = get_handle_obj( current->process, req->handle, 0, NULL ))) return;
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if (obj->ops == &desktop_ops)
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{
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struct desktop *desktop = (struct desktop *)obj;
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reply->is_desktop = 1;
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reply->old_obj_flags = desktop->flags;
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if (req->flags & SET_USER_OBJECT_FLAGS) desktop->flags = req->obj_flags;
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}
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else if (obj->ops == &winstation_ops)
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{
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struct winstation *winstation = (struct winstation *)obj;
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reply->is_desktop = 0;
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reply->old_obj_flags = winstation->flags;
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if (req->flags & SET_USER_OBJECT_FLAGS) winstation->flags = req->obj_flags;
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}
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else
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{
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set_error( STATUS_OBJECT_TYPE_MISMATCH );
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release_object( obj );
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return;
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}
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if (get_reply_max_size())
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{
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size_t len;
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const WCHAR *ptr, *name = get_object_name( obj, &len );
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/* if there is a backslash return the part of the name after it */
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if (name && (ptr = memchrW( name, '\\', len )))
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{
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len -= (ptr + 1 - name) * sizeof(WCHAR);
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name = ptr + 1;
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}
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if (name) set_reply_data( name, min( len, get_reply_max_size() ));
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}
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release_object( obj );
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}
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