programs/wineboot/shutdown.c

   1 /*
   2  * Copyright (C) 2006 Alexandre Julliard
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20 #include <stdlib.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winuser.h"
  25 #include "tlhelp32.h"
  26
  27 #include "wine/debug.h"
  28
  29 #include "resource.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(wineboot);
  32
  33 #define MESSAGE_TIMEOUT     5000
  34
  35 struct window_info
  36 {
  37     HWND  hwnd;
  38     DWORD pid;
  39     DWORD tid;
  40 };
  41
  42 static UINT win_count;
  43 static UINT win_max;
  44 static struct window_info *windows;
  45 static DWORD desktop_pid;
  46
  47 /* store a new window; callback for EnumWindows */
  48 static BOOL CALLBACK enum_proc( HWND hwnd, LPARAM lp )
  49 {
  50     if (win_count >= win_max)
  51     {
  52         UINT new_count = win_max * 2;
  53         struct window_info *new_win = HeapReAlloc( GetProcessHeap(), 0, windows,
  54                                                    new_count * sizeof(windows[0]) );
  55         if (!new_win) return FALSE;
  56         windows = new_win;
  57         win_max = new_count;
  58     }
  59     windows[win_count].hwnd = hwnd;
  60     windows[win_count].tid = GetWindowThreadProcessId( hwnd, &windows[win_count].pid );
  61     win_count++;
  62     return TRUE;
  63 }
  64
  65 /* compare two window info structures; callback for qsort */
  66 static int cmp_window( const void *ptr1, const void *ptr2 )
  67 {
  68     const struct window_info *info1 = ptr1;
  69     const struct window_info *info2 = ptr2;
  70     int ret = info1->pid - info2->pid;
  71     if (!ret) ret = info1->tid - info2->tid;
  72     return ret;
  73 }
  74
  75 /* build the list of all windows (FIXME: handle multiple desktops) */
  76 static BOOL get_all_windows(void)
  77 {
  78     win_count = 0;
  79     win_max = 16;
  80     windows = HeapAlloc( GetProcessHeap(), 0, win_max * sizeof(windows[0]) );
  81     if (!windows) return FALSE;
  82     if (!EnumWindows( enum_proc, 0 )) return FALSE;
  83     /* sort windows by processes */
  84     qsort( windows, win_count, sizeof(windows[0]), cmp_window );
  85     return TRUE;
  86 }
  87
  88 struct callback_data
  89 {
  90     UINT window_count;
  91     BOOL timed_out;
  92     LRESULT result;
  93 };
  94
  95 static void CALLBACK end_session_message_callback( HWND hwnd, UINT msg, ULONG_PTR data, LRESULT lresult )
  96 {
  97     struct callback_data *cb_data = (struct callback_data *)data;
  98
  99     WINE_TRACE( "received response %s hwnd %p lresult %ld\n",
 100                 msg == WM_QUERYENDSESSION ? "WM_QUERYENDSESSION" : (msg == WM_ENDSESSION ? "WM_ENDSESSION" : "Unknown"),
 101                 hwnd, lresult );
 102
 103     /* If the window was destroyed while the message was in its queue, SendMessageCallback()
 104        calls us with a default 0 result.  Ignore it. */
 105     if (!lresult && !IsWindow( hwnd ))
 106     {
 107         WINE_TRACE( "window was destroyed; ignoring FALSE lresult\n" );
 108         lresult = TRUE;
 109     }
 110
 111     /* we only care if a WM_QUERYENDSESSION response is FALSE */
 112     cb_data->result = cb_data->result && lresult;
 113
 114     /* cheap way of ref-counting callback_data whilst freeing memory at correct
 115      * time */
 116     if (!(cb_data->window_count--) && cb_data->timed_out)
 117         HeapFree( GetProcessHeap(), 0, cb_data );
 118 }
 119
 120 struct endtask_dlg_data
 121 {
 122     struct window_info *win;
 123     BOOL cancelled;
 124     BOOL terminated;
 125 };
 126
 127 static INT_PTR CALLBACK endtask_dlg_proc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam )
 128 {
 129     struct endtask_dlg_data *data;
 130     HANDLE handle;
 131
 132     switch (msg)
 133     {
 134     case WM_INITDIALOG:
 135         SetWindowLongPtrW( hwnd, DWLP_USER, lparam );
 136         data = (struct endtask_dlg_data *)lparam;
 137         ShowWindow( hwnd, SW_SHOWNORMAL );
 138         return TRUE;
 139     case WM_COMMAND:
 140         data = (struct endtask_dlg_data *)GetWindowLongPtrW( hwnd, DWLP_USER );
 141         switch (wparam)
 142         {
 143         case MAKEWPARAM(IDOK, BN_CLICKED):
 144             handle = OpenProcess( PROCESS_TERMINATE, FALSE, data->win[0].pid );
 145             if (handle)
 146             {
 147                 WINE_TRACE( "terminating process %04x\n", data->win[0].pid );
 148                 TerminateProcess( handle, 0 );
 149                 CloseHandle( handle );
 150                 data->terminated = TRUE;
 151             }
 152             return TRUE;
 153         case MAKEWPARAM(IDCANCEL, BN_CLICKED):
 154             data->cancelled = TRUE;
 155             return TRUE;
 156         }
 157         break;
 158     }
 159     return FALSE;
 160 }
 161
 162 /* Sends a message to a set of windows, displaying a dialog if the window
 163  * doesn't respond to the message within a set amount of time.
 164  * If the process has already been terminated, the function returns -1.
 165  * If the user or application cancels the process, the function returns 0.
 166  * Otherwise the function returns 0. */
 167 static LRESULT send_messages_with_timeout_dialog(
 168     struct window_info *win, UINT count, HANDLE process_handle,
 169     UINT msg, WPARAM wparam, LPARAM lparam )
 170 {
 171     unsigned int i;
 172     DWORD ret;
 173     DWORD start_time;
 174     struct callback_data *cb_data;
 175     HWND hwnd_endtask = NULL;
 176     struct endtask_dlg_data dlg_data;
 177     LRESULT result;
 178
 179     cb_data = HeapAlloc( GetProcessHeap(), 0, sizeof(*cb_data) );
 180     if (!cb_data)
 181         return 1;
 182
 183     cb_data->result = TRUE; /* we only care if a WM_QUERYENDSESSION response is FALSE */
 184     cb_data->timed_out = FALSE;
 185     cb_data->window_count = count;
 186
 187     dlg_data.win = win;
 188     dlg_data.terminated = FALSE;
 189     dlg_data.cancelled = FALSE;
 190
 191     for (i = 0; i < count; i++)
 192     {
 193         if (!SendMessageCallbackW( win[i].hwnd, msg, wparam, lparam,
 194                                    end_session_message_callback, (ULONG_PTR)cb_data ))
 195             cb_data->window_count --;
 196     }
 197
 198     start_time = GetTickCount();
 199     while (TRUE)
 200     {
 201         DWORD current_time = GetTickCount();
 202
 203         ret = MsgWaitForMultipleObjects( 1, &process_handle, FALSE,
 204                                          MESSAGE_TIMEOUT - (current_time - start_time),
 205                                          QS_ALLINPUT );
 206         if (ret == WAIT_OBJECT_0) /* process exited */
 207         {
 208             HeapFree( GetProcessHeap(), 0, cb_data );
 209             result = 1;
 210             goto cleanup;
 211         }
 212         else if (ret == WAIT_OBJECT_0 + 1) /* window message */
 213         {
 214             MSG msg;
 215             while(PeekMessageW( &msg, NULL, 0, 0, PM_REMOVE ))
 216             {
 217                 if (!hwnd_endtask || !IsDialogMessageW( hwnd_endtask, &msg ))
 218                 {
 219                     TranslateMessage( &msg );
 220                     DispatchMessageW( &msg );
 221                 }
 222             }
 223             if (!cb_data->window_count)
 224             {
 225                 result = dlg_data.terminated || cb_data->result;
 226                 HeapFree( GetProcessHeap(), 0, cb_data );
 227                 if (!result)
 228                     goto cleanup;
 229                 break;
 230             }
 231             if (dlg_data.cancelled)
 232             {
 233                 cb_data->timed_out = TRUE;
 234                 result = 0;
 235                 goto cleanup;
 236             }
 237         }
 238         else if ((ret == WAIT_TIMEOUT) && !hwnd_endtask)
 239         {
 240             hwnd_endtask = CreateDialogParamW( GetModuleHandleW(NULL),
 241                                                MAKEINTRESOURCEW(IDD_ENDTASK),
 242                                                NULL, endtask_dlg_proc,
 243                                                (LPARAM)&dlg_data );
 244         }
 245         else break;
 246     }
 247
 248     result = 1;
 249
 250 cleanup:
 251     if (hwnd_endtask) DestroyWindow( hwnd_endtask );
 252     return result;
 253 }
 254
 255 /* send WM_QUERYENDSESSION and WM_ENDSESSION to all windows of a given process */
 256 static DWORD_PTR send_end_session_messages( struct window_info *win, UINT count, UINT flags )
 257 {
 258     LRESULT result, end_session;
 259     HANDLE process_handle;
 260     DWORD ret;
 261
 262     /* FIXME: Use flags to implement EWX_FORCEIFHUNG! */
 263     /* don't kill the desktop process */
 264     if (win[0].pid == desktop_pid) return 1;
 265
 266     process_handle = OpenProcess( SYNCHRONIZE, FALSE, win[0].pid );
 267     if (!process_handle)
 268         return 1;
 269
 270     end_session = send_messages_with_timeout_dialog( win, count, process_handle,
 271                                                      WM_QUERYENDSESSION, 0, 0 );
 272     if (end_session == -1)
 273     {
 274         CloseHandle( process_handle );
 275         return 1;
 276     }
 277
 278     result = send_messages_with_timeout_dialog( win, count, process_handle,
 279                                                 WM_ENDSESSION, end_session, 0 );
 280     if (end_session == 0)
 281     {
 282         CloseHandle( process_handle );
 283         return 0;
 284     }
 285     if (result == -1)
 286     {
 287         CloseHandle( process_handle );
 288         return 1;
 289     }
 290
 291     /* Check whether the app quit on its own */
 292     ret = WaitForSingleObject( process_handle, 0 );
 293     CloseHandle( process_handle );
 294     if (ret == WAIT_TIMEOUT)
 295     {
 296         /* If not, it returned from all WM_ENDSESSION and is finished cleaning
 297          * up, so we can safely kill the process. */
 298         HANDLE handle = OpenProcess( PROCESS_TERMINATE, FALSE, win[0].pid );
 299         if (handle)
 300         {
 301             WINE_TRACE( "terminating process %04x\n", win[0].pid );
 302             TerminateProcess( handle, 0 );
 303             CloseHandle( handle );
 304         }
 305     }
 306     return 1;
 307 }
 308
 309 /* close all top-level windows and terminate processes cleanly */
 310 BOOL shutdown_close_windows( BOOL force )
 311 {
 312     UINT send_flags = force ? SMTO_ABORTIFHUNG : SMTO_NORMAL;
 313     DWORD_PTR result = 1;
 314     UINT i, n;
 315
 316     if (!get_all_windows()) return FALSE;
 317
 318     GetWindowThreadProcessId( GetDesktopWindow(), &desktop_pid );
 319
 320     for (i = n = 0; result && i < win_count; i++, n++)
 321     {
 322         if (n && windows[i-1].pid != windows[i].pid)
 323         {
 324             result = send_end_session_messages( windows + i - n, n, send_flags );
 325             n = 0;
 326         }
 327     }
 328     if (n && result)
 329         result = send_end_session_messages( windows + win_count - n, n, send_flags );
 330
 331     HeapFree( GetProcessHeap(), 0, windows );
 332
 333     return (result != 0);
 334 }
 335
 336 static BOOL CALLBACK shutdown_one_desktop( LPWSTR name, LPARAM force )
 337 {
 338     HDESK hdesk;
 339
 340     WINE_TRACE("Shutting down desktop %s\n", wine_dbgstr_w(name));
 341
 342     hdesk = OpenDesktopW( name, 0, FALSE, GENERIC_ALL );
 343     if (hdesk == NULL)
 344     {
 345         WINE_ERR("Cannot open desktop %s, err=%i\n", wine_dbgstr_w(name), GetLastError());
 346         return FALSE;
 347     }
 348
 349     if (!SetThreadDesktop( hdesk ))
 350     {
 351         CloseDesktop( hdesk );
 352         WINE_ERR("Cannot set thread desktop %s, err=%i\n", wine_dbgstr_w(name), GetLastError());
 353         return FALSE;
 354     }
 355
 356     CloseDesktop( hdesk );
 357
 358     return shutdown_close_windows( force );
 359 }
 360
 361 BOOL shutdown_all_desktops( BOOL force )
 362 {
 363     BOOL ret;
 364     HDESK prev_desktop;
 365
 366     prev_desktop = GetThreadDesktop(GetCurrentThreadId());
 367
 368     ret = EnumDesktopsW( NULL, shutdown_one_desktop, (LPARAM)force );
 369
 370     SetThreadDesktop(prev_desktop);
 371
 372     return ret;
 373 }
 374
 375 /* forcibly kill all processes without any cleanup */
 376 void kill_processes( BOOL kill_desktop )
 377 {
 378     BOOL res;
 379     UINT killed;
 380     HANDLE handle, snapshot;
 381     PROCESSENTRY32W process;
 382
 383     GetWindowThreadProcessId( GetDesktopWindow(), &desktop_pid );
 384
 385     do
 386     {
 387         if (!(snapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 ))) break;
 388
 389         killed = 0;
 390         process.dwSize = sizeof(process);
 391         for (res = Process32FirstW( snapshot, &process ); res; res = Process32NextW( snapshot, &process ))
 392         {
 393             if (process.th32ProcessID == GetCurrentProcessId()) continue;
 394             if (process.th32ProcessID == desktop_pid) continue;
 395             WINE_TRACE("killing process %04x %s\n",
 396                        process.th32ProcessID, wine_dbgstr_w(process.szExeFile) );
 397             if (!(handle = OpenProcess( PROCESS_TERMINATE, FALSE, process.th32ProcessID )))
 398                 continue;
 399             if (TerminateProcess( handle, 0 )) killed++;
 400             CloseHandle( handle );
 401         }
 402         CloseHandle( snapshot );
 403     } while (killed > 0);
 404
 405     if (desktop_pid && kill_desktop)  /* do this last */
 406     {
 407         if ((handle = OpenProcess( PROCESS_TERMINATE, FALSE, desktop_pid )))
 408         {
 409             TerminateProcess( handle, 0 );
 410             CloseHandle( handle );
 411         }
 412     }
 413 }