src/startup.c

   1 /*
   2  *  Window Maker window manager
   3  *
   4  *  Copyright (c) 1997-2003 Alfredo K. Kojima
   5  *  Copyright (c) 1998-2003 Dan Pascu
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License along
  18  *  with this program; if not, write to the Free Software Foundation, Inc.,
  19  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "wconfig.h"
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <signal.h>
  30 #include <sys/wait.h>
  31 #ifdef __FreeBSD__
  32 #include <sys/signal.h>
  33 #endif
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/Xresource.h>
  37 #include <X11/Xutil.h>
  38 #include <X11/cursorfont.h>
  39 #include <X11/Xproto.h>
  40 #include <X11/keysym.h>
  41 #ifdef SHAPE
  42 #include <X11/extensions/shape.h>
  43 #endif
  44 #ifdef KEEP_XKB_LOCK_STATUS
  45 #include <X11/XKBlib.h>
  46 #endif
  47 #ifdef HAVE_XRANDR
  48 #include <X11/extensions/Xrandr.h>
  49 #endif
  50
  51 #include "WindowMaker.h"
  52 #include "GNUstep.h"
  53 #include "texture.h"
  54 #include "screen.h"
  55 #include "window.h"
  56 #include "actions.h"
  57 #include "client.h"
  58 #include "main.h"
  59 #include "dock.h"
  60 #include "workspace.h"
  61 #include "keybind.h"
  62 #include "framewin.h"
  63 #include "session.h"
  64 #include "defaults.h"
  65 #include "properties.h"
  66 #include "dialog.h"
  67 #include "wmspec.h"
  68 #ifdef XDND
  69 #include "xdnd.h"
  70 #endif
  71
  72 #include "xutil.h"
  73
  74 /* for SunOS */
  75 #ifndef SA_RESTART
  76 # define SA_RESTART 0
  77 #endif
  78
  79 /* Just in case, for weirdo systems */
  80 #ifndef SA_NODEFER
  81 # define SA_NODEFER 0
  82 #endif
  83
  84 /****** Global Variables ******/
  85 extern WPreferences wPreferences;
  86 extern WDDomain *WDWindowMaker;
  87 extern WDDomain *WDRootMenu;
  88 extern WDDomain *WDWindowAttributes;
  89 extern WShortKey wKeyBindings[WKBD_LAST];
  90 extern int wScreenCount;
  91
  92 #ifdef SHAPE
  93 extern Bool wShapeSupported;
  94 extern int wShapeEventBase;
  95 #endif
  96
  97 #ifdef KEEP_XKB_LOCK_STATUS
  98 extern Bool wXkbSupported;
  99 extern int wXkbEventBase;
 100 #endif
 101
 102 /* contexts */
 103 extern XContext wWinContext;
 104 extern XContext wAppWinContext;
 105 extern XContext wStackContext;
 106 extern XContext wVEdgeContext;
 107
 108 /* atoms */
 109 extern Atom _XA_WM_STATE;
 110 extern Atom _XA_WM_CHANGE_STATE;
 111 extern Atom _XA_WM_PROTOCOLS;
 112 extern Atom _XA_WM_TAKE_FOCUS;
 113 extern Atom _XA_WM_DELETE_WINDOW;
 114 extern Atom _XA_WM_SAVE_YOURSELF;
 115 extern Atom _XA_WM_CLIENT_LEADER;
 116 extern Atom _XA_WM_COLORMAP_WINDOWS;
 117 extern Atom _XA_WM_COLORMAP_NOTIFY;
 118 extern Atom _XA_GNUSTEP_WM_ATTR;
 119 extern Atom _XA_WINDOWMAKER_MENU;
 120 extern Atom _XA_WINDOWMAKER_WM_PROTOCOLS;
 121 extern Atom _XA_WINDOWMAKER_STATE;
 122 extern Atom _XA_WINDOWMAKER_WM_FUNCTION;
 123 extern Atom _XA_WINDOWMAKER_NOTICEBOARD;
 124 extern Atom _XA_WINDOWMAKER_COMMAND;
 125 extern Atom _XA_WINDOWMAKER_ICON_SIZE;
 126 extern Atom _XA_WINDOWMAKER_ICON_TILE;
 127 extern Atom _XA_GNUSTEP_WM_MINIATURIZE_WINDOW;
 128 extern Atom _XA_GNUSTEP_TITLEBAR_STATE;
 129 extern Atom _XA_WM_IGNORE_FOCUS_EVENTS;
 130
 131 /* cursors */
 132 extern Cursor wCursor[WCUR_LAST];
 133
 134 #ifndef HAVE_INOTIFY
 135 /* special flags */
 136 extern char WDelayedActionSet;
 137 #endif
 138
 139 extern void NotifyDeadProcess(pid_t pid, unsigned char status);
 140
 141 /***** Local *****/
 142 static WScreen **wScreen = NULL;
 143 static unsigned int _NumLockMask = 0;
 144 static unsigned int _ScrollLockMask = 0;
 145 static void manageAllWindows(WScreen * scr, int crashed);
 146
 147 static int catchXError(Display * dpy, XErrorEvent * error)
 148 {
 149         char buffer[MAXLINE];
 150
 151         /* ignore some errors */
 152         if (error->resourceid != None
 153             && ((error->error_code == BadDrawable && error->request_code == X_GetGeometry)
 154                 || (error->error_code == BadMatch && (error->request_code == X_SetInputFocus))
 155                 || (error->error_code == BadWindow)
 156                 /*
 157                    && (error->request_code == X_GetWindowAttributes
 158                    || error->request_code == X_SetInputFocus
 159                    || error->request_code == X_ChangeWindowAttributes
 160                    || error->request_code == X_GetProperty
 161                    || error->request_code == X_ChangeProperty
 162                    || error->request_code == X_QueryTree
 163                    || error->request_code == X_GrabButton
 164                    || error->request_code == X_UngrabButton
 165                    || error->request_code == X_SendEvent
 166                    || error->request_code == X_ConfigureWindow))
 167                  */
 168                 || (error->request_code == X_InstallColormap))) {
 169                 return 0;
 170         }
 171         FormatXError(dpy, error, buffer, MAXLINE);
 172         wwarning(_("internal X error: %s"), buffer);
 173         return -1;
 174 }
 175
 176 /*
 177  *----------------------------------------------------------------------
 178  * handleXIO-
 179  *      Handle X shutdowns and other stuff.
 180  *----------------------------------------------------------------------
 181  */
 182 static int handleXIO(Display * xio_dpy)
 183 {
 184         dpy = NULL;
 185         Exit(0);
 186         return 0;
 187 }
 188
 189 #ifndef HAVE_INOTIFY
 190 /*
 191  *----------------------------------------------------------------------
 192  * delayedAction-
 193  *      Action to be executed after the signal() handler is exited.
 194  *----------------------------------------------------------------------
 195  */
 196 static void delayedAction(void *cdata)
 197 {
 198         if (WDelayedActionSet == 0)
 199                 return;
 200
 201         WDelayedActionSet--;
 202         /*
 203          * Make the event dispatcher do whatever it needs to do,
 204          * including handling zombie processes, restart and exit
 205          * signals.
 206          */
 207         DispatchEvent(NULL);
 208 }
 209 #endif
 210
 211 /*
 212  *----------------------------------------------------------------------
 213  * handleExitSig--
 214  *      User generated exit signal handler.
 215  *----------------------------------------------------------------------
 216  */
 217 static RETSIGTYPE handleExitSig(int sig)
 218 {
 219         sigset_t sigs;
 220
 221         sigfillset(&sigs);
 222         sigprocmask(SIG_BLOCK, &sigs, NULL);
 223
 224         if (sig == SIGUSR1) {
 225                 wwarning("got signal %i - restarting", sig);
 226                 SIG_WCHANGE_STATE(WSTATE_NEED_RESTART);
 227         } else if (sig == SIGUSR2) {
 228                 wwarning("got signal %i - rereading defaults", sig);
 229                 SIG_WCHANGE_STATE(WSTATE_NEED_REREAD);
 230         } else if (sig == SIGTERM || sig == SIGINT || sig == SIGHUP) {
 231                 wwarning("got signal %i - exiting...", sig);
 232                 SIG_WCHANGE_STATE(WSTATE_NEED_EXIT);
 233         }
 234
 235         sigprocmask(SIG_UNBLOCK, &sigs, NULL);
 236         DispatchEvent(NULL);    /* Dispatch events imediately. */
 237 }
 238
 239 /* Dummy signal handler */
 240 static void dummyHandler(int sig)
 241 {
 242 }
 243
 244 /*
 245  *----------------------------------------------------------------------
 246  * handleSig--
 247  *      general signal handler. Exits the program gently.
 248  *----------------------------------------------------------------------
 249  */
 250 static RETSIGTYPE handleSig(int sig)
 251 {
 252         wfatal("got signal %i", sig);
 253
 254         /* Setting the signal behaviour back to default and then reraising the
 255          * signal is a cleaner way to make program exit and core dump than calling
 256          * abort(), since it correctly returns from the signal handler and sets
 257          * the flags accordingly. -Dan
 258          */
 259         if (sig == SIGSEGV || sig == SIGFPE || sig == SIGBUS || sig == SIGILL || sig == SIGABRT) {
 260                 signal(sig, SIG_DFL);
 261                 kill(getpid(), sig);
 262                 return;
 263         }
 264
 265         wAbort(0);
 266 }
 267
 268 static RETSIGTYPE buryChild(int foo)
 269 {
 270         pid_t pid;
 271         int status;
 272         int save_errno = errno;
 273         sigset_t sigs;
 274
 275         sigfillset(&sigs);
 276         /* Block signals so that NotifyDeadProcess() doesn't get fux0red */
 277         sigprocmask(SIG_BLOCK, &sigs, NULL);
 278
 279         /* R.I.P. */
 280         /* If 2 or more kids exit in a small time window, before this handler gets
 281          * the chance to get invoked, the SIGCHLD signals will be merged and only
 282          * one SIGCHLD signal will be sent to us. We use a while loop to get all
 283          * exited child status because we can't count on the number of SIGCHLD
 284          * signals to know exactly how many kids have exited. -Dan
 285          */
 286         while ((pid = waitpid(-1, &status, WNOHANG)) > 0 || (pid < 0 && errno == EINTR)) {
 287                 NotifyDeadProcess(pid, WEXITSTATUS(status));
 288         }
 289
 290         sigprocmask(SIG_UNBLOCK, &sigs, NULL);
 291
 292         errno = save_errno;
 293 }
 294
 295 static void getOffendingModifiers(void)
 296 {
 297         int i;
 298         XModifierKeymap *modmap;
 299         KeyCode nlock, slock;
 300         static int mask_table[8] = {
 301                 ShiftMask, LockMask, ControlMask, Mod1Mask,
 302                 Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
 303         };
 304
 305         nlock = XKeysymToKeycode(dpy, XK_Num_Lock);
 306         slock = XKeysymToKeycode(dpy, XK_Scroll_Lock);
 307
 308         /*
 309          * Find out the masks for the NumLock and ScrollLock modifiers,
 310          * so that we can bind the grabs for when they are enabled too.
 311          */
 312         modmap = XGetModifierMapping(dpy);
 313
 314         if (modmap != NULL && modmap->max_keypermod > 0) {
 315                 for (i = 0; i < 8 * modmap->max_keypermod; i++) {
 316                         if (modmap->modifiermap[i] == nlock && nlock != 0)
 317                                 _NumLockMask = mask_table[i / modmap->max_keypermod];
 318                         else if (modmap->modifiermap[i] == slock && slock != 0)
 319                                 _ScrollLockMask = mask_table[i / modmap->max_keypermod];
 320                 }
 321         }
 322
 323         if (modmap)
 324                 XFreeModifiermap(modmap);
 325 }
 326
 327 #ifdef NUMLOCK_HACK
 328 void
 329 wHackedGrabKey(int keycode, unsigned int modifiers,
 330                Window grab_window, Bool owner_events, int pointer_mode, int keyboard_mode)
 331 {
 332         if (modifiers == AnyModifier)
 333                 return;
 334
 335         /* grab all combinations of the modifier with CapsLock, NumLock and
 336          * ScrollLock. How much memory/CPU does such a monstrosity consume
 337          * in the server?
 338          */
 339         if (_NumLockMask)
 340                 XGrabKey(dpy, keycode, modifiers | _NumLockMask,
 341                          grab_window, owner_events, pointer_mode, keyboard_mode);
 342         if (_ScrollLockMask)
 343                 XGrabKey(dpy, keycode, modifiers | _ScrollLockMask,
 344                          grab_window, owner_events, pointer_mode, keyboard_mode);
 345         if (_NumLockMask && _ScrollLockMask)
 346                 XGrabKey(dpy, keycode, modifiers | _NumLockMask | _ScrollLockMask,
 347                          grab_window, owner_events, pointer_mode, keyboard_mode);
 348         if (_NumLockMask)
 349                 XGrabKey(dpy, keycode, modifiers | _NumLockMask | LockMask,
 350                          grab_window, owner_events, pointer_mode, keyboard_mode);
 351         if (_ScrollLockMask)
 352                 XGrabKey(dpy, keycode, modifiers | _ScrollLockMask | LockMask,
 353                          grab_window, owner_events, pointer_mode, keyboard_mode);
 354         if (_NumLockMask && _ScrollLockMask)
 355                 XGrabKey(dpy, keycode, modifiers | _NumLockMask | _ScrollLockMask | LockMask,
 356                          grab_window, owner_events, pointer_mode, keyboard_mode);
 357         /* phew, I guess that's all, right? */
 358 }
 359 #endif
 360
 361 void
 362 wHackedGrabButton(unsigned int button, unsigned int modifiers,
 363                   Window grab_window, Bool owner_events,
 364                   unsigned int event_mask, int pointer_mode, int keyboard_mode, Window confine_to, Cursor cursor)
 365 {
 366         XGrabButton(dpy, button, modifiers, grab_window, owner_events,
 367                     event_mask, pointer_mode, keyboard_mode, confine_to, cursor);
 368
 369         if (modifiers == AnyModifier)
 370                 return;
 371
 372         XGrabButton(dpy, button, modifiers | LockMask, grab_window, owner_events,
 373                     event_mask, pointer_mode, keyboard_mode, confine_to, cursor);
 374
 375 #ifdef NUMLOCK_HACK
 376         /* same as above, but for mouse buttons */
 377         if (_NumLockMask)
 378                 XGrabButton(dpy, button, modifiers | _NumLockMask,
 379                             grab_window, owner_events, event_mask, pointer_mode,
 380                             keyboard_mode, confine_to, cursor);
 381         if (_ScrollLockMask)
 382                 XGrabButton(dpy, button, modifiers | _ScrollLockMask,
 383                             grab_window, owner_events, event_mask, pointer_mode,
 384                             keyboard_mode, confine_to, cursor);
 385         if (_NumLockMask && _ScrollLockMask)
 386                 XGrabButton(dpy, button, modifiers | _ScrollLockMask | _NumLockMask,
 387                             grab_window, owner_events, event_mask, pointer_mode,
 388                             keyboard_mode, confine_to, cursor);
 389         if (_NumLockMask)
 390                 XGrabButton(dpy, button, modifiers | _NumLockMask | LockMask,
 391                             grab_window, owner_events, event_mask, pointer_mode,
 392                             keyboard_mode, confine_to, cursor);
 393         if (_ScrollLockMask)
 394                 XGrabButton(dpy, button, modifiers | _ScrollLockMask | LockMask,
 395                             grab_window, owner_events, event_mask, pointer_mode,
 396                             keyboard_mode, confine_to, cursor);
 397         if (_NumLockMask && _ScrollLockMask)
 398                 XGrabButton(dpy, button, modifiers | _ScrollLockMask | _NumLockMask | LockMask,
 399                             grab_window, owner_events, event_mask, pointer_mode,
 400                             keyboard_mode, confine_to, cursor);
 401 #endif                          /* NUMLOCK_HACK */
 402 }
 403
 404 WScreen *wScreenWithNumber(int i)
 405 {
 406         assert(i < wScreenCount);
 407
 408         return wScreen[i];
 409 }
 410
 411 WScreen *wScreenForRootWindow(Window window)
 412 {
 413         int i;
 414
 415         if (wScreenCount == 1)
 416                 return wScreen[0];
 417
 418         /* Since the number of heads will probably be small (normally 2),
 419          * it should be faster to use this than a hash table, because
 420          * of the overhead. */
 421         for (i = 0; i < wScreenCount; i++)
 422                 if (wScreen[i]->root_win == window)
 423                         return wScreen[i];
 424
 425         return wScreenForWindow(window);
 426 }
 427
 428 WScreen *wScreenForWindow(Window window)
 429 {
 430         XWindowAttributes attr;
 431
 432         if (wScreenCount == 1)
 433                 return wScreen[0];
 434
 435         if (XGetWindowAttributes(dpy, window, &attr))
 436                 return wScreenForRootWindow(attr.root);
 437
 438         return NULL;
 439 }
 440
 441 static char *atomNames[] = {
 442         "WM_STATE",
 443         "WM_CHANGE_STATE",
 444         "WM_PROTOCOLS",
 445         "WM_TAKE_FOCUS",
 446         "WM_DELETE_WINDOW",
 447         "WM_SAVE_YOURSELF",
 448         "WM_CLIENT_LEADER",
 449         "WM_COLORMAP_WINDOWS",
 450         "WM_COLORMAP_NOTIFY",
 451
 452         "_WINDOWMAKER_MENU",
 453         "_WINDOWMAKER_STATE",
 454         "_WINDOWMAKER_WM_PROTOCOLS",
 455         "_WINDOWMAKER_WM_FUNCTION",
 456         "_WINDOWMAKER_NOTICEBOARD",
 457         "_WINDOWMAKER_COMMAND",
 458         "_WINDOWMAKER_ICON_SIZE",
 459         "_WINDOWMAKER_ICON_TILE",
 460
 461         GNUSTEP_WM_ATTR_NAME,
 462         GNUSTEP_WM_MINIATURIZE_WINDOW,
 463         GNUSTEP_TITLEBAR_STATE,
 464
 465         "WM_IGNORE_FOCUS_EVENTS"
 466 };
 467
 468 /*
 469  *----------------------------------------------------------
 470  * StartUp--
 471  *      starts the window manager and setup global data.
 472  * Called from main() at startup.
 473  *
 474  * Side effects:
 475  * global data declared in main.c is initialized
 476  *----------------------------------------------------------
 477  */
 478 void StartUp(Bool defaultScreenOnly)
 479 {
 480         struct sigaction sig_action;
 481         int j, max;
 482 #ifdef HAVE_XRANDR
 483         int dummy;
 484 #endif
 485         Atom atom[sizeof(atomNames) / sizeof(char *)];
 486
 487         /*
 488          * Ignore CapsLock in modifiers
 489          */
 490         ValidModMask = 0xff & ~LockMask;
 491
 492         getOffendingModifiers();
 493         /*
 494          * Ignore NumLock and ScrollLock too
 495          */
 496         ValidModMask &= ~(_NumLockMask | _ScrollLockMask);
 497
 498         memset(&wKeyBindings, 0, sizeof(wKeyBindings));
 499
 500         wWinContext = XUniqueContext();
 501         wAppWinContext = XUniqueContext();
 502         wStackContext = XUniqueContext();
 503         wVEdgeContext = XUniqueContext();
 504
 505         /*    _XA_VERSION = XInternAtom(dpy, "VERSION", False); */
 506
 507 #ifdef HAVE_XINTERNATOMS
 508         XInternAtoms(dpy, atomNames, sizeof(atomNames) / sizeof(char *), False, atom);
 509 #else
 510
 511         {
 512                 int i;
 513                 for (i = 0; i < sizeof(atomNames) / sizeof(char *); i++)
 514                         atom[i] = XInternAtom(dpy, atomNames[i], False);
 515         }
 516 #endif
 517
 518         _XA_WM_STATE = atom[0];
 519         _XA_WM_CHANGE_STATE = atom[1];
 520         _XA_WM_PROTOCOLS = atom[2];
 521         _XA_WM_TAKE_FOCUS = atom[3];
 522         _XA_WM_DELETE_WINDOW = atom[4];
 523         _XA_WM_SAVE_YOURSELF = atom[5];
 524         _XA_WM_CLIENT_LEADER = atom[6];
 525         _XA_WM_COLORMAP_WINDOWS = atom[7];
 526         _XA_WM_COLORMAP_NOTIFY = atom[8];
 527
 528         _XA_WINDOWMAKER_MENU = atom[9];
 529         _XA_WINDOWMAKER_STATE = atom[10];
 530         _XA_WINDOWMAKER_WM_PROTOCOLS = atom[11];
 531         _XA_WINDOWMAKER_WM_FUNCTION = atom[12];
 532         _XA_WINDOWMAKER_NOTICEBOARD = atom[13];
 533         _XA_WINDOWMAKER_COMMAND = atom[14];
 534         _XA_WINDOWMAKER_ICON_SIZE = atom[15];
 535         _XA_WINDOWMAKER_ICON_TILE = atom[16];
 536
 537         _XA_GNUSTEP_WM_ATTR = atom[17];
 538         _XA_GNUSTEP_WM_MINIATURIZE_WINDOW = atom[18];
 539         _XA_GNUSTEP_TITLEBAR_STATE = atom[19];
 540
 541         _XA_WM_IGNORE_FOCUS_EVENTS = atom[20];
 542
 543 #ifdef XDND
 544         wXDNDInitializeAtoms();
 545 #endif
 546
 547         /* cursors */
 548         wCursor[WCUR_NORMAL] = None;    /* inherit from root */
 549         wCursor[WCUR_ROOT] = XCreateFontCursor(dpy, XC_left_ptr);
 550         wCursor[WCUR_ARROW] = XCreateFontCursor(dpy, XC_top_left_arrow);
 551         wCursor[WCUR_MOVE] = XCreateFontCursor(dpy, XC_fleur);
 552         wCursor[WCUR_RESIZE] = XCreateFontCursor(dpy, XC_sizing);
 553         wCursor[WCUR_TOPLEFTRESIZE] = XCreateFontCursor(dpy, XC_top_left_corner);
 554         wCursor[WCUR_TOPRIGHTRESIZE] = XCreateFontCursor(dpy, XC_top_right_corner);
 555         wCursor[WCUR_BOTTOMLEFTRESIZE] = XCreateFontCursor(dpy, XC_bottom_left_corner);
 556         wCursor[WCUR_BOTTOMRIGHTRESIZE] = XCreateFontCursor(dpy, XC_bottom_right_corner);
 557         wCursor[WCUR_VERTICALRESIZE] = XCreateFontCursor(dpy, XC_sb_v_double_arrow);
 558         wCursor[WCUR_HORIZONRESIZE] = XCreateFontCursor(dpy, XC_sb_h_double_arrow);
 559         wCursor[WCUR_WAIT] = XCreateFontCursor(dpy, XC_watch);
 560         wCursor[WCUR_QUESTION] = XCreateFontCursor(dpy, XC_question_arrow);
 561         wCursor[WCUR_TEXT] = XCreateFontCursor(dpy, XC_xterm);  /* odd name??? */
 562         wCursor[WCUR_SELECT] = XCreateFontCursor(dpy, XC_cross);
 563
 564         Pixmap cur = XCreatePixmap(dpy, DefaultRootWindow(dpy), 16, 16, 1);
 565         GC gc = XCreateGC(dpy, cur, 0, NULL);
 566         XColor black;
 567         memset(&black, 0, sizeof(XColor));
 568         XSetForeground(dpy, gc, 0);
 569         XFillRectangle(dpy, cur, gc, 0, 0, 16, 16);
 570         XFreeGC(dpy, gc);
 571         wCursor[WCUR_EMPTY] = XCreatePixmapCursor(dpy, cur, cur, &black, &black, 0, 0);
 572         XFreePixmap(dpy, cur);
 573
 574
 575 #ifndef HAVE_INOTIFY
 576         /* signal handler stuff that gets called when a signal is caught */
 577         WMAddPersistentTimerHandler(500, delayedAction, NULL);
 578 #endif
 579
 580         /* emergency exit... */
 581         sig_action.sa_handler = handleSig;
 582         sigemptyset(&sig_action.sa_mask);
 583
 584         sig_action.sa_flags = SA_RESTART;
 585         sigaction(SIGQUIT, &sig_action, NULL);
 586         /* instead of catching these, we let the default handler abort the
 587          * program. The new monitor process will take appropriate action
 588          * when it detects the crash.
 589          sigaction(SIGSEGV, &sig_action, NULL);
 590          sigaction(SIGBUS, &sig_action, NULL);
 591          sigaction(SIGFPE, &sig_action, NULL);
 592          sigaction(SIGABRT, &sig_action, NULL);
 593          */
 594
 595         sig_action.sa_handler = handleExitSig;
 596
 597         /* Here we set SA_RESTART for safety, because SIGUSR1 may not be handled
 598          * immediately. -Dan */
 599         sig_action.sa_flags = SA_RESTART;
 600         sigaction(SIGTERM, &sig_action, NULL);
 601         sigaction(SIGINT, &sig_action, NULL);
 602         sigaction(SIGHUP, &sig_action, NULL);
 603         sigaction(SIGUSR1, &sig_action, NULL);
 604         sigaction(SIGUSR2, &sig_action, NULL);
 605
 606         /* ignore dead pipe */
 607         /* Because POSIX mandates that only signal with handlers are reset
 608          * accross an exec*(), we do not want to propagate ignoring SIGPIPEs
 609          * to children. Hence the dummy handler.
 610          * Philippe Troin <phil@fifi.org>
 611          */
 612         sig_action.sa_handler = &dummyHandler;
 613         sig_action.sa_flags = SA_RESTART;
 614         sigaction(SIGPIPE, &sig_action, NULL);
 615
 616         /* handle dead children */
 617         sig_action.sa_handler = buryChild;
 618         sig_action.sa_flags = SA_NOCLDSTOP | SA_RESTART;
 619         sigaction(SIGCHLD, &sig_action, NULL);
 620
 621         /* Now we unblock all signals, that may have been blocked by the parent
 622          * who exec()-ed us. This can happen for example if Window Maker crashes
 623          * and restarts itself or another window manager from the signal handler.
 624          * In this case, the new proccess inherits the blocked signal mask and
 625          * will no longer react to that signal, until unblocked.
 626          * This is because the signal handler of the proccess who crashed (parent)
 627          * didn't return, and the signal remained blocked. -Dan
 628          */
 629         sigfillset(&sig_action.sa_mask);
 630         sigprocmask(SIG_UNBLOCK, &sig_action.sa_mask, NULL);
 631
 632         /* handle X shutdowns a such */
 633         XSetIOErrorHandler(handleXIO);
 634
 635         /* set hook for out event dispatcher in WINGs event dispatcher */
 636         WMHookEventHandler(DispatchEvent);
 637
 638         /* initialize defaults stuff */
 639         WDWindowMaker = wDefaultsInitDomain("WindowMaker", True);
 640         if (!WDWindowMaker->dictionary)
 641                 wwarning(_("could not read domain \"%s\" from defaults database"), "WindowMaker");
 642
 643         /* read defaults that don't change until a restart and are
 644          * screen independent */
 645         wReadStaticDefaults(WDWindowMaker ? WDWindowMaker->dictionary : NULL);
 646
 647         /* check sanity of some values */
 648         if (wPreferences.icon_size < 16) {
 649                 wwarning(_("icon size is configured to %i, but it's too small. Using 16 instead"),
 650                          wPreferences.icon_size);
 651                 wPreferences.icon_size = 16;
 652         }
 653
 654         /* init other domains */
 655         WDRootMenu = wDefaultsInitDomain("WMRootMenu", False);
 656         if (!WDRootMenu->dictionary)
 657                 wwarning(_("could not read domain \"%s\" from defaults database"), "WMRootMenu");
 658
 659         wDefaultsMergeGlobalMenus(WDRootMenu);
 660
 661         WDWindowAttributes = wDefaultsInitDomain("WMWindowAttributes", True);
 662         if (!WDWindowAttributes->dictionary)
 663                 wwarning(_("could not read domain \"%s\" from defaults database"), "WMWindowAttributes");
 664
 665         XSetErrorHandler((XErrorHandler) catchXError);
 666
 667 #ifdef SHAPE
 668         /* ignore j */
 669         wShapeSupported = XShapeQueryExtension(dpy, &wShapeEventBase, &j);
 670 #endif
 671
 672 #ifdef HAVE_XRANDR
 673         has_randr = XRRQueryExtension(dpy, &randr_event_base, &dummy);
 674 #endif
 675
 676 #ifdef KEEP_XKB_LOCK_STATUS
 677         wXkbSupported = XkbQueryExtension(dpy, NULL, &wXkbEventBase, NULL, NULL, NULL);
 678         if (wPreferences.modelock && !wXkbSupported) {
 679                 wwarning(_("XKB is not supported. KbdModeLock is automatically disabled."));
 680                 wPreferences.modelock = 0;
 681         }
 682 #endif
 683
 684         if (defaultScreenOnly)
 685                 max = 1;
 686         else
 687                 max = ScreenCount(dpy);
 688
 689         wScreen = wmalloc(sizeof(WScreen *) * max);
 690
 691         wScreenCount = 0;
 692
 693         /* manage the screens */
 694         for (j = 0; j < max; j++) {
 695                 if (defaultScreenOnly || max == 1) {
 696                         wScreen[wScreenCount] = wScreenInit(DefaultScreen(dpy));
 697                         if (!wScreen[wScreenCount]) {
 698                                 wfatal(_("it seems that there is already a window manager running"));
 699                                 Exit(1);
 700                         }
 701                 } else {
 702                         wScreen[wScreenCount] = wScreenInit(j);
 703                         if (!wScreen[wScreenCount]) {
 704                                 wwarning(_("could not manage screen %i"), j);
 705                                 continue;
 706                         }
 707                 }
 708                 wScreenCount++;
 709         }
 710
 711         InitializeSwitchMenu();
 712
 713         /* initialize/restore state for the screens */
 714         for (j = 0; j < wScreenCount; j++) {
 715                 int lastDesktop;
 716
 717                 lastDesktop = wNETWMGetCurrentDesktopFromHint(wScreen[j]);
 718
 719                 wScreenRestoreState(wScreen[j]);
 720
 721                 /* manage all windows that were already here before us */
 722                 if (!wPreferences.flags.nodock && wScreen[j]->dock)
 723                         wScreen[j]->last_dock = wScreen[j]->dock;
 724
 725                 manageAllWindows(wScreen[j], wPreferences.flags.restarting == 2);
 726
 727                 /* restore saved menus */
 728                 wMenuRestoreState(wScreen[j]);
 729
 730                 /* If we're not restarting, restore session */
 731                 if (wPreferences.flags.restarting == 0 && !wPreferences.flags.norestore)
 732                         wSessionRestoreState(wScreen[j]);
 733
 734                 if (!wPreferences.flags.noautolaunch) {
 735                         /* auto-launch apps */
 736                         if (!wPreferences.flags.nodock && wScreen[j]->dock) {
 737                                 wScreen[j]->last_dock = wScreen[j]->dock;
 738                                 wDockDoAutoLaunch(wScreen[j]->dock, 0);
 739                         }
 740                         /* auto-launch apps in clip */
 741                         if (!wPreferences.flags.noclip) {
 742                                 int i;
 743                                 for (i = 0; i < wScreen[j]->workspace_count; i++) {
 744                                         if (wScreen[j]->workspaces[i]->clip) {
 745                                                 wScreen[j]->last_dock = wScreen[j]->workspaces[i]->clip;
 746                                                 wDockDoAutoLaunch(wScreen[j]->workspaces[i]->clip, i);
 747                                         }
 748                                 }
 749                         }
 750                         /* auto-launch apps in drawers */
 751                         if (!wPreferences.flags.nodrawer) {
 752                                 WDrawerChain *dc;
 753                                 for (dc = wScreen[j]->drawers; dc; dc = dc->next) {
 754                                         wScreen[j]->last_dock = dc->adrawer;
 755                                         wDockDoAutoLaunch(dc->adrawer, 0);
 756                                 }
 757                         }
 758                 }
 759
 760                 /* go to workspace where we were before restart */
 761                 if (lastDesktop >= 0)
 762                         wWorkspaceForceChange(wScreen[j], lastDesktop);
 763                 else
 764                         wSessionRestoreLastWorkspace(wScreen[j]);
 765         }
 766
 767         if (wScreenCount == 0) {
 768                 wfatal(_("could not manage any screen"));
 769                 Exit(1);
 770         }
 771
 772 #ifndef HAVE_INOTIFY
 773         /* setup defaults file polling */
 774         if (!wPreferences.flags.nopolling && !wPreferences.flags.noupdates)
 775                 WMAddTimerHandler(3000, wDefaultsCheckDomains, NULL);
 776 #endif
 777
 778 }
 779
 780 static Bool windowInList(Window window, Window * list, int count)
 781 {
 782         for (; count >= 0; count--) {
 783                 if (window == list[count])
 784                         return True;
 785         }
 786         return False;
 787 }
 788
 789 /*
 790  *-----------------------------------------------------------------------
 791  * manageAllWindows--
 792  *      Manages all windows in the screen.
 793  *
 794  * Notes:
 795  *      Called when the wm is being started.
 796  *      No events can be processed while the windows are being
 797  * reparented/managed.
 798  *-----------------------------------------------------------------------
 799  */
 800 static void manageAllWindows(WScreen * scr, int crashRecovery)
 801 {
 802         Window root, parent;
 803         Window *children;
 804         unsigned int nchildren;
 805         unsigned int i, j;
 806         WWindow *wwin;
 807
 808         XGrabServer(dpy);
 809         XQueryTree(dpy, scr->root_win, &root, &parent, &children, &nchildren);
 810
 811         scr->flags.startup = 1;
 812
 813         /* first remove all icon windows */
 814         for (i = 0; i < nchildren; i++) {
 815                 XWMHints *wmhints;
 816
 817                 if (children[i] == None)
 818                         continue;
 819
 820                 wmhints = XGetWMHints(dpy, children[i]);
 821                 if (wmhints && (wmhints->flags & IconWindowHint)) {
 822                         for (j = 0; j < nchildren; j++) {
 823                                 if (children[j] == wmhints->icon_window) {
 824                                         XFree(wmhints);
 825                                         wmhints = NULL;
 826                                         children[j] = None;
 827                                         break;
 828                                 }
 829                         }
 830                 }
 831                 if (wmhints) {
 832                         XFree(wmhints);
 833                 }
 834         }
 835
 836         for (i = 0; i < nchildren; i++) {
 837                 if (children[i] == None)
 838                         continue;
 839
 840                 wwin = wManageWindow(scr, children[i]);
 841                 if (wwin) {
 842                         /* apply states got from WSavedState */
 843                         /* shaded + minimized is not restored correctly */
 844                         if (wwin->flags.shaded) {
 845                                 wwin->flags.shaded = 0;
 846                                 wShadeWindow(wwin);
 847                         }
 848                         if (wwin->flags.miniaturized
 849                             && (wwin->transient_for == None
 850                                 || wwin->transient_for == scr->root_win
 851                                 || !windowInList(wwin->transient_for, children, nchildren))) {
 852
 853                                 wwin->flags.skip_next_animation = 1;
 854                                 wwin->flags.miniaturized = 0;
 855                                 wIconifyWindow(wwin);
 856                         } else {
 857                                 wClientSetState(wwin, NormalState, None);
 858                         }
 859                         if (crashRecovery) {
 860                                 int border;
 861
 862                                 border = (!HAS_BORDER(wwin) ? 0 : scr->frame_border_width);
 863
 864                                 wWindowMove(wwin, wwin->frame_x - border,
 865                                             wwin->frame_y - border -
 866                                             (wwin->frame->titlebar ? wwin->frame->titlebar->height : 0));
 867                         }
 868                 }
 869         }
 870         XUngrabServer(dpy);
 871
 872         /* hide apps */
 873         wwin = scr->focused_window;
 874         while (wwin) {
 875                 if (wwin->flags.hidden) {
 876                         WApplication *wapp = wApplicationOf(wwin->main_window);
 877
 878                         if (wapp) {
 879                                 wwin->flags.hidden = 0;
 880                                 wHideApplication(wapp);
 881                         } else {
 882                                 wwin->flags.hidden = 0;
 883                         }
 884                 }
 885                 wwin = wwin->prev;
 886         }
 887
 888         XFree(children);
 889         scr->flags.startup = 0;
 890         scr->flags.startup2 = 1;
 891
 892         while (XPending(dpy)) {
 893                 XEvent ev;
 894                 WMNextEvent(dpy, &ev);
 895                 WMHandleEvent(&ev);
 896         }
 897         scr->last_workspace = 0;
 898         wWorkspaceForceChange(scr, 0);
 899         if (!wPreferences.flags.noclip)
 900                 wDockShowIcons(scr->workspaces[scr->current_workspace]->clip);
 901         scr->flags.startup2 = 0;
 902 }