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     /* we only care if a WM_QUERYENDSESSION response is FALSE */
 104     cb_data->result = cb_data->result && lresult;
 105
 106     /* cheap way of ref-counting callback_data whilst freeing memory at correct
 107      * time */
 108     if (!(cb_data->window_count--) && cb_data->timed_out)
 109         HeapFree( GetProcessHeap(), 0, cb_data );
 110 }
 111
 112 struct endtask_dlg_data
 113 {
 114     struct window_info *win;
 115     BOOL cancelled;
 116 };
 117
 118 static INT_PTR CALLBACK endtask_dlg_proc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam )
 119 {
 120     struct endtask_dlg_data *data;
 121     HANDLE handle;
 122
 123     switch (msg)
 124     {
 125     case WM_INITDIALOG:
 126         SetWindowLongPtrW( hwnd, DWLP_USER, lparam );
 127         data = (struct endtask_dlg_data *)lparam;
 128         ShowWindow( hwnd, SW_SHOWNORMAL );
 129         return TRUE;
 130     case WM_COMMAND:
 131         data = (struct endtask_dlg_data *)GetWindowLongPtrW( hwnd, DWLP_USER );
 132         switch (wparam)
 133         {
 134         case MAKEWPARAM(IDOK, BN_CLICKED):
 135             handle = OpenProcess( PROCESS_TERMINATE, FALSE, data->win[0].pid );
 136             if (handle)
 137             {
 138                 WINE_TRACE( "terminating process %04x\n", data->win[0].pid );
 139                 TerminateProcess( handle, 0 );
 140                 CloseHandle( handle );
 141             }
 142             return TRUE;
 143         case MAKEWPARAM(IDCANCEL, BN_CLICKED):
 144             data->cancelled = TRUE;
 145             return TRUE;
 146         }
 147         break;
 148     }
 149     return FALSE;
 150 }
 151
 152 /* Sends a message to a set of windows, displaying a dialog if the window
 153  * doesn't respond to the message within a set amount of time.
 154  * If the process has already been terminated, the function returns -1.
 155  * If the user or application cancels the process, the function returns 0.
 156  * Otherwise the function returns 0. */
 157 static LRESULT send_messages_with_timeout_dialog(
 158     struct window_info *win, UINT count, HANDLE process_handle,
 159     UINT msg, WPARAM wparam, LPARAM lparam )
 160 {
 161     unsigned int i;
 162     DWORD ret;
 163     DWORD start_time;
 164     struct callback_data *cb_data;
 165     HWND hwnd_endtask = NULL;
 166     struct endtask_dlg_data dlg_data;
 167     LRESULT result;
 168
 169     cb_data = HeapAlloc( GetProcessHeap(), 0, sizeof(*cb_data) );
 170     if (!cb_data)
 171         return 1;
 172
 173     cb_data->result = TRUE; /* we only care if a WM_QUERYENDSESSION response is FALSE */
 174     cb_data->timed_out = FALSE;
 175     cb_data->window_count = count;
 176
 177     dlg_data.win = win;
 178     dlg_data.cancelled = FALSE;
 179
 180     for (i = 0; i < count; i++)
 181     {
 182         if (!SendMessageCallbackW( win[i].hwnd, msg, wparam, lparam,
 183                                    end_session_message_callback, (ULONG_PTR)cb_data ))
 184             cb_data->window_count --;
 185     }
 186
 187     start_time = GetTickCount();
 188     while (TRUE)
 189     {
 190         DWORD current_time = GetTickCount();
 191
 192         ret = MsgWaitForMultipleObjects( 1, &process_handle, FALSE,
 193                                          MESSAGE_TIMEOUT - (current_time - start_time),
 194                                          QS_ALLINPUT );
 195         if (ret == WAIT_OBJECT_0) /* process exited */
 196         {
 197             HeapFree( GetProcessHeap(), 0, cb_data );
 198             result = 1;
 199             goto cleanup;
 200         }
 201         else if (ret == WAIT_OBJECT_0 + 1) /* window message */
 202         {
 203             MSG msg;
 204             while(PeekMessageW( &msg, NULL, 0, 0, PM_REMOVE ))
 205             {
 206                 if (!hwnd_endtask || !IsDialogMessageW( hwnd_endtask, &msg ))
 207                 {
 208                     TranslateMessage( &msg );
 209                     DispatchMessageW( &msg );
 210                 }
 211             }
 212             if (!cb_data->window_count)
 213             {
 214                 result = cb_data->result;
 215                 HeapFree( GetProcessHeap(), 0, cb_data );
 216                 if (!result)
 217                     goto cleanup;
 218                 break;
 219             }
 220             if (dlg_data.cancelled)
 221             {
 222                 cb_data->timed_out = TRUE;
 223                 result = 0;
 224                 goto cleanup;
 225             }
 226         }
 227         else if ((ret == WAIT_TIMEOUT) && !hwnd_endtask)
 228         {
 229             hwnd_endtask = CreateDialogParamW( GetModuleHandleW(NULL),
 230                                                MAKEINTRESOURCEW(IDD_ENDTASK),
 231                                                NULL, endtask_dlg_proc,
 232                                                (LPARAM)&dlg_data );
 233         }
 234         else break;
 235     }
 236
 237     result = 1;
 238
 239 cleanup:
 240     if (hwnd_endtask) DestroyWindow( hwnd_endtask );
 241     return result;
 242 }
 243
 244 /* send WM_QUERYENDSESSION and WM_ENDSESSION to all windows of a given process */
 245 static DWORD_PTR send_end_session_messages( struct window_info *win, UINT count, UINT flags )
 246 {
 247     LRESULT result, end_session;
 248     HANDLE process_handle;
 249     DWORD ret;
 250
 251     /* FIXME: Use flags to implement EWX_FORCEIFHUNG! */
 252     /* don't kill the desktop process */
 253     if (win[0].pid == desktop_pid) return 1;
 254
 255     process_handle = OpenProcess( SYNCHRONIZE, FALSE, win[0].pid );
 256     if (!process_handle)
 257         return 1;
 258
 259     end_session = send_messages_with_timeout_dialog( win, count, process_handle,
 260                                                      WM_QUERYENDSESSION, 0, 0 );
 261     if (end_session == -1)
 262     {
 263         CloseHandle( process_handle );
 264         return 1;
 265     }
 266
 267     result = send_messages_with_timeout_dialog( win, count, process_handle,
 268                                                 WM_ENDSESSION, end_session, 0 );
 269     if (end_session == 0)
 270     {
 271         CloseHandle( process_handle );
 272         return 0;
 273     }
 274     if (result == -1)
 275     {
 276         CloseHandle( process_handle );
 277         return 1;
 278     }
 279
 280     /* Check whether the app quit on its own */
 281     ret = WaitForSingleObject( process_handle, 0 );
 282     CloseHandle( process_handle );
 283     if (ret == WAIT_TIMEOUT)
 284     {
 285         /* If not, it returned from all WM_ENDSESSION and is finished cleaning
 286          * up, so we can safely kill the process. */
 287         HANDLE handle = OpenProcess( PROCESS_TERMINATE, FALSE, win[0].pid );
 288         if (handle)
 289         {
 290             WINE_TRACE( "terminating process %04x\n", win[0].pid );
 291             TerminateProcess( handle, 0 );
 292             CloseHandle( handle );
 293         }
 294     }
 295     return 1;
 296 }
 297
 298 /* close all top-level windows and terminate processes cleanly */
 299 BOOL shutdown_close_windows( BOOL force )
 300 {
 301     UINT send_flags = force ? SMTO_ABORTIFHUNG : SMTO_NORMAL;
 302     DWORD_PTR result = 1;
 303     UINT i, n;
 304
 305     if (!get_all_windows()) return FALSE;
 306
 307     GetWindowThreadProcessId( GetDesktopWindow(), &desktop_pid );
 308
 309     for (i = n = 0; result && i < win_count; i++, n++)
 310     {
 311         if (n && windows[i-1].pid != windows[i].pid)
 312         {
 313             result = send_end_session_messages( windows + i - n, n, send_flags );
 314             n = 0;
 315         }
 316     }
 317     if (n && result)
 318         result = send_end_session_messages( windows + win_count - n, n, send_flags );
 319
 320     HeapFree( GetProcessHeap(), 0, windows );
 321
 322     return (result != 0);
 323 }
 324
 325 /* forcibly kill all processes without any cleanup */
 326 void kill_processes( BOOL kill_desktop )
 327 {
 328     BOOL res;
 329     UINT killed;
 330     HANDLE handle, snapshot;
 331     PROCESSENTRY32W process;
 332
 333     GetWindowThreadProcessId( GetDesktopWindow(), &desktop_pid );
 334
 335     do
 336     {
 337         if (!(snapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 ))) break;
 338
 339         killed = 0;
 340         process.dwSize = sizeof(process);
 341         for (res = Process32FirstW( snapshot, &process ); res; res = Process32NextW( snapshot, &process ))
 342         {
 343             if (process.th32ProcessID == GetCurrentProcessId()) continue;
 344             if (process.th32ProcessID == desktop_pid) continue;
 345             WINE_TRACE("killing process %04x %s\n",
 346                        process.th32ProcessID, wine_dbgstr_w(process.szExeFile) );
 347             if (!(handle = OpenProcess( PROCESS_TERMINATE, FALSE, process.th32ProcessID )))
 348                 continue;
 349             if (TerminateProcess( handle, 0 )) killed++;
 350             CloseHandle( handle );
 351         }
 352         CloseHandle( snapshot );
 353     } while (killed > 0);
 354
 355     if (desktop_pid && kill_desktop)  /* do this last */
 356     {
 357         if ((handle = OpenProcess( PROCESS_TERMINATE, FALSE, desktop_pid )))
 358         {
 359             TerminateProcess( handle, 0 );
 360             CloseHandle( handle );
 361         }
 362     }
 363 }