openbox/openbox.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    openbox.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003        Ben Jansens
   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    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "debug.h"
  21 #include "openbox.h"
  22 #include "session.h"
  23 #include "dock.h"
  24 #include "event.h"
  25 #include "menu.h"
  26 #include "client.h"
  27 #include "xerror.h"
  28 #include "prop.h"
  29 #include "screen.h"
  30 #include "startupnotify.h"
  31 #include "focus.h"
  32 #include "moveresize.h"
  33 #include "frame.h"
  34 #include "keyboard.h"
  35 #include "mouse.h"
  36 #include "extensions.h"
  37 #include "menuframe.h"
  38 #include "grab.h"
  39 #include "group.h"
  40 #include "config.h"
  41 #include "mainloop.h"
  42 #include "gettext.h"
  43 #include "parser/parse.h"
  44 #include "render/render.h"
  45 #include "render/theme.h"
  46
  47 #ifdef HAVE_FCNTL_H
  48 #  include <fcntl.h>
  49 #endif
  50 #ifdef HAVE_SIGNAL_H
  51 #  include <signal.h>
  52 #endif
  53 #ifdef HAVE_STDLIB_H
  54 #  include <stdlib.h>
  55 #endif
  56 #ifdef HAVE_LOCALE_H
  57 #  include <locale.h>
  58 #endif
  59 #ifdef HAVE_SYS_STAT_H
  60 #  include <sys/stat.h>
  61 #  include <sys/types.h>
  62 #endif
  63 #ifdef HAVE_SYS_WAIT_H
  64 #  include <sys/types.h>
  65 #  include <sys/wait.h>
  66 #endif
  67 #ifdef HAVE_UNISTD_H
  68 #  include <unistd.h>
  69 #endif
  70 #include <errno.h>
  71
  72 #include <X11/cursorfont.h>
  73
  74 RrInstance *ob_rr_inst;
  75 RrTheme    *ob_rr_theme;
  76 ObMainLoop *ob_main_loop;
  77 Display    *ob_display;
  78 gint        ob_screen;
  79 gboolean    ob_replace_wm = FALSE;
  80
  81 static ObState   state;
  82 static gboolean  xsync = FALSE;
  83 static gboolean  reconfigure = FALSE;
  84 static gboolean  restart = FALSE;
  85 static gchar    *restart_path = NULL;
  86 static Cursor    cursors[OB_NUM_CURSORS];
  87 static KeyCode   keys[OB_NUM_KEYS];
  88 static gint      exitcode = 0;
  89 static gboolean  message_and_exit = FALSE;
  90 static guint     message = 0;
  91 static gboolean  being_replaced = FALSE;
  92
  93 static void signal_handler(gint signal, gpointer data);
  94 static void parse_args(gint argc, gchar **argv);
  95
  96 gint main(gint argc, gchar **argv)
  97 {
  98 #ifdef DEBUG
  99     ob_debug_show_output(TRUE);
 100 #endif
 101
 102     state = OB_STATE_STARTING;
 103
 104     /* initialize the locale */
 105     if (!setlocale(LC_ALL, ""))
 106         g_warning("Couldn't set locale from environment.\n");
 107     bindtextdomain(PACKAGE_NAME, LOCALEDIR);
 108     bind_textdomain_codeset(PACKAGE_NAME, "UTF-8");
 109     textdomain(PACKAGE_NAME);
 110
 111     g_set_prgname(argv[0]);
 112
 113     if (chdir(g_get_home_dir()) == -1)
 114         g_warning("Unable to change to home directory (%s): %s",
 115                   g_get_home_dir(), g_strerror(errno));
 116
 117     /* parse out command line args */
 118     parse_args(argc, argv);
 119
 120     if (!message_and_exit) {
 121         parse_paths_startup();
 122
 123         session_startup(argc, argv);
 124     }
 125
 126     ob_display = XOpenDisplay(NULL);
 127     if (ob_display == NULL)
 128         ob_exit_with_error("Failed to open the display.");
 129     if (fcntl(ConnectionNumber(ob_display), F_SETFD, 1) == -1)
 130         ob_exit_with_error("Failed to set display as close-on-exec.");
 131
 132     if (message_and_exit) {
 133         prop_startup();
 134
 135         /* Send client message telling the OB process to:
 136          * message = 1 -> reconfigure
 137          * message = 2 -> restart */
 138         PROP_MSG(RootWindow(ob_display, ob_screen),
 139                  ob_control, message, 0, 0, 0);
 140         XCloseDisplay(ob_display);
 141         exit(0);
 142     }
 143
 144     ob_main_loop = ob_main_loop_new(ob_display);
 145
 146     /* set up signal handler */
 147     ob_main_loop_signal_add(ob_main_loop, SIGUSR1, signal_handler, NULL, NULL);
 148     ob_main_loop_signal_add(ob_main_loop, SIGUSR2, signal_handler, NULL, NULL);
 149     ob_main_loop_signal_add(ob_main_loop, SIGTERM, signal_handler, NULL, NULL);
 150     ob_main_loop_signal_add(ob_main_loop, SIGINT, signal_handler, NULL, NULL);
 151     ob_main_loop_signal_add(ob_main_loop, SIGHUP, signal_handler, NULL, NULL);
 152     ob_main_loop_signal_add(ob_main_loop, SIGPIPE, signal_handler, NULL, NULL);
 153     ob_main_loop_signal_add(ob_main_loop, SIGCHLD, signal_handler, NULL, NULL);
 154
 155     ob_screen = DefaultScreen(ob_display);
 156
 157     ob_rr_inst = RrInstanceNew(ob_display, ob_screen);
 158     if (ob_rr_inst == NULL)
 159         ob_exit_with_error("Failed to initialize the render library.");
 160
 161     XSynchronize(ob_display, xsync);
 162
 163     /* check for locale support */
 164     if (!XSupportsLocale())
 165         g_warning("X server does not support locale.");
 166     if (!XSetLocaleModifiers(""))
 167         g_warning("Cannot set locale modifiers for the X server.");
 168
 169     /* set our error handler */
 170     XSetErrorHandler(xerror_handler);
 171
 172     /* set the DISPLAY environment variable for any lauched children, to the
 173        display we're using, so they open in the right place. */
 174     putenv(g_strdup_printf("DISPLAY=%s", DisplayString(ob_display)));
 175
 176     /* create available cursors */
 177     cursors[OB_CURSOR_NONE] = None;
 178     cursors[OB_CURSOR_POINTER] =
 179         XCreateFontCursor(ob_display, XC_left_ptr);
 180     cursors[OB_CURSOR_BUSY] =
 181         XCreateFontCursor(ob_display, XC_watch);
 182     cursors[OB_CURSOR_MOVE] =
 183         XCreateFontCursor(ob_display, XC_fleur);
 184     cursors[OB_CURSOR_NORTH] =
 185         XCreateFontCursor(ob_display, XC_top_side);
 186     cursors[OB_CURSOR_NORTHEAST] =
 187         XCreateFontCursor(ob_display, XC_top_right_corner);
 188     cursors[OB_CURSOR_EAST] =
 189         XCreateFontCursor(ob_display, XC_right_side);
 190     cursors[OB_CURSOR_SOUTHEAST] =
 191         XCreateFontCursor(ob_display, XC_bottom_right_corner);
 192     cursors[OB_CURSOR_SOUTH] =
 193         XCreateFontCursor(ob_display, XC_bottom_side);
 194     cursors[OB_CURSOR_SOUTHWEST] =
 195         XCreateFontCursor(ob_display, XC_bottom_left_corner);
 196     cursors[OB_CURSOR_WEST] =
 197         XCreateFontCursor(ob_display, XC_left_side);
 198     cursors[OB_CURSOR_NORTHWEST] =
 199         XCreateFontCursor(ob_display, XC_top_left_corner);
 200
 201     /* create available keycodes */
 202     keys[OB_KEY_RETURN] =
 203         XKeysymToKeycode(ob_display, XStringToKeysym("Return"));
 204     keys[OB_KEY_ESCAPE] =
 205         XKeysymToKeycode(ob_display, XStringToKeysym("Escape"));
 206     keys[OB_KEY_LEFT] =
 207         XKeysymToKeycode(ob_display, XStringToKeysym("Left"));
 208     keys[OB_KEY_RIGHT] =
 209         XKeysymToKeycode(ob_display, XStringToKeysym("Right"));
 210     keys[OB_KEY_UP] =
 211         XKeysymToKeycode(ob_display, XStringToKeysym("Up"));
 212     keys[OB_KEY_DOWN] =
 213         XKeysymToKeycode(ob_display, XStringToKeysym("Down"));
 214
 215     prop_startup(); /* get atoms values for the display */
 216     extensions_query_all(); /* find which extensions are present */
 217
 218     if (screen_annex()) { /* it will be ours! */
 219         do {
 220             {
 221                 ObParseInst *i;
 222                 xmlDocPtr doc;
 223                 xmlNodePtr node;
 224
 225                 /* startup the parsing so everything can register sections
 226                    of the rc */
 227                 i = parse_startup();
 228
 229                 config_startup(i);
 230                 /* parse/load user options */
 231                 if (parse_load_rc(&doc, &node))
 232                     parse_tree(i, doc, node->xmlChildrenNode);
 233                 /* we're done with parsing now, kill it */
 234                 parse_close(doc);
 235                 parse_shutdown(i);
 236             }
 237
 238             /* load the theme specified in the rc file */
 239             {
 240                 RrTheme *theme;
 241                 if ((theme = RrThemeNew(ob_rr_inst, config_theme,
 242                                         config_font_activewindow,
 243                                         config_font_inactivewindow,
 244                                         config_font_menutitle,
 245                                         config_font_menuitem)))
 246                 {
 247                     RrThemeFree(ob_rr_theme);
 248                     ob_rr_theme = theme;
 249                 }
 250                 if (ob_rr_theme == NULL)
 251                     ob_exit_with_error("Unable to load a theme.");
 252             }
 253
 254             if (reconfigure) {
 255                 GList *it;
 256
 257                 /* update all existing windows for the new theme */
 258                 for (it = client_list; it; it = g_list_next(it)) {
 259                     ObClient *c = it->data;
 260                     frame_adjust_theme(c->frame);
 261                 }
 262             }
 263             event_startup(reconfigure);
 264             /* focus_backup is used for stacking, so this needs to come before
 265                anything that calls stacking_add */
 266             focus_startup(reconfigure);
 267             window_startup(reconfigure);
 268             sn_startup(reconfigure);
 269             screen_startup(reconfigure);
 270             grab_startup(reconfigure);
 271             group_startup(reconfigure);
 272             client_startup(reconfigure);
 273             dock_startup(reconfigure);
 274             moveresize_startup(reconfigure);
 275             keyboard_startup(reconfigure);
 276             mouse_startup(reconfigure);
 277             menu_startup(reconfigure);
 278
 279             if (!reconfigure) {
 280                 /* get all the existing windows */
 281                 client_manage_all();
 282                 focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 283             } else {
 284                 GList *it;
 285
 286                 /* redecorate all existing windows */
 287                 for (it = client_list; it; it = g_list_next(it)) {
 288                     ObClient *c = it->data;
 289                     /* the new config can change the window's decorations */
 290                     client_setup_decor_and_functions(c);
 291                     /* redraw the frames */
 292                     frame_adjust_area(c->frame, TRUE, TRUE, FALSE);
 293                 }
 294             }
 295
 296             reconfigure = FALSE;
 297
 298             state = OB_STATE_RUNNING;
 299             ob_main_loop_run(ob_main_loop);
 300             state = OB_STATE_EXITING;
 301
 302             if (!reconfigure) {
 303                 dock_remove_all();
 304                 client_unmanage_all();
 305             }
 306
 307             menu_shutdown(reconfigure);
 308             mouse_shutdown(reconfigure);
 309             keyboard_shutdown(reconfigure);
 310             moveresize_shutdown(reconfigure);
 311             dock_shutdown(reconfigure);
 312             client_shutdown(reconfigure);
 313             group_shutdown(reconfigure);
 314             grab_shutdown(reconfigure);
 315             screen_shutdown(reconfigure);
 316             focus_shutdown(reconfigure);
 317             sn_shutdown(reconfigure);
 318             window_shutdown(reconfigure);
 319             event_shutdown(reconfigure);
 320             config_shutdown();
 321         } while (reconfigure);
 322     }
 323
 324     XSync(ob_display, FALSE);
 325
 326     RrThemeFree(ob_rr_theme);
 327     RrInstanceFree(ob_rr_inst);
 328
 329     session_shutdown(being_replaced);
 330
 331     XCloseDisplay(ob_display);
 332
 333     parse_paths_shutdown();
 334
 335     if (restart) {
 336         if (restart_path != NULL) {
 337             gint argcp;
 338             gchar **argvp;
 339             GError *err = NULL;
 340
 341             /* run other window manager */
 342             if (g_shell_parse_argv(restart_path, &argcp, &argvp, &err)) {
 343                 execvp(argvp[0], argvp);
 344                 g_strfreev(argvp);
 345             } else {
 346                 g_warning("failed to execute '%s': %s", restart_path,
 347                           err->message);
 348                 g_error_free(err);
 349             }
 350         }
 351
 352         /* re-run me */
 353         execvp(argv[0], argv); /* try how we were run */
 354         execlp(argv[0], g_path_get_basename(argv[0]),
 355                (char *)NULL); /* last resort */
 356     }
 357
 358     return exitcode;
 359 }
 360
 361 static void signal_handler(gint signal, gpointer data)
 362 {
 363     switch (signal) {
 364     case SIGUSR1:
 365         ob_debug("Caught signal %d. Restarting.\n", signal);
 366         ob_restart();
 367         break;
 368     case SIGUSR2:
 369         ob_debug("Caught signal %d. Reconfiguring.\n", signal);
 370         ob_reconfigure();
 371         break;
 372     case SIGCHLD:
 373         /* reap children */
 374         while (waitpid(-1, NULL, WNOHANG) > 0);
 375         break;
 376     default:
 377         ob_debug("Caught signal %d. Exiting.\n", signal);
 378         /* TERM and INT return a 0 code */
 379         ob_exit(!(signal == SIGTERM || signal == SIGINT));
 380     }
 381 }
 382
 383 static void print_version()
 384 {
 385     g_print("Openbox %s\n", PACKAGE_VERSION);
 386     g_print("Copyright (c) 2006 Mikael Magnusson\n");
 387     g_print("Copyright (c) 2003 Ben Jansens\n\n");
 388     g_print("This program comes with ABSOLUTELY NO WARRANTY.\n");
 389     g_print("This is free software, and you are welcome to redistribute it\n");
 390     g_print("under certain conditions. See the file COPYING for details.\n\n");
 391 }
 392
 393 static void print_help()
 394 {
 395     g_print("Syntax: openbox [options]\n\n");
 396     g_print("Options:\n\n");
 397     g_print("  --reconfigure       Tell the currently running instance of "
 398             "Openbox to\n"
 399             "                      reconfigure (and then exit immediately)\n");
 400 #ifdef USE_SM
 401     g_print("  --sm-disable        Disable connection to session manager\n");
 402     g_print("  --sm-client-id ID   Specify session management ID\n");
 403     g_print("  --sm-save-file FILE Specify file to load a saved session"
 404             "from\n");
 405 #endif
 406     g_print("  --replace           Replace the currently running window "
 407             "manager\n");
 408     g_print("  --help              Display this help and exit\n");
 409     g_print("  --version           Display the version and exit\n");
 410     g_print("  --sync              Run in synchronous mode (this is slow and "
 411             "meant for\n"
 412             "                      debugging X routines)\n");
 413     g_print("  --debug             Display debugging output\n");
 414     g_print("\nPlease report bugs at %s\n\n", PACKAGE_BUGREPORT);
 415 }
 416
 417 static void parse_args(gint argc, gchar **argv)
 418 {
 419     gint i;
 420
 421     for (i = 1; i < argc; ++i) {
 422         if (!strcmp(argv[i], "--version")) {
 423             print_version();
 424             exit(0);
 425         } else if (!strcmp(argv[i], "--help")) {
 426             print_help();
 427             exit(0);
 428         } else if (!strcmp(argv[i], "--g-fatal-warnings")) {
 429             g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
 430         } else if (!strcmp(argv[i], "--replace")) {
 431             ob_replace_wm = TRUE;
 432         } else if (!strcmp(argv[i], "--sync")) {
 433             xsync = TRUE;
 434         } else if (!strcmp(argv[i], "--debug")) {
 435             ob_debug_show_output(TRUE);
 436         } else if (!strcmp(argv[i], "--reconfigure")) {
 437             message_and_exit = TRUE;
 438             message = 1;
 439         } else if (!strcmp(argv[i], "--restart")) {
 440             message_and_exit = TRUE;
 441             message = 2;
 442         }
 443     }
 444 }
 445
 446 void ob_exit_with_error(gchar *msg)
 447 {
 448     g_critical(msg);
 449     session_shutdown(TRUE);
 450     exit(EXIT_FAILURE);
 451 }
 452
 453 void ob_restart_other(const gchar *path)
 454 {
 455     restart_path = g_strdup(path);
 456     ob_restart();
 457 }
 458
 459 void ob_restart()
 460 {
 461     restart = TRUE;
 462     ob_exit(0);
 463 }
 464
 465 void ob_reconfigure()
 466 {
 467     reconfigure = TRUE;
 468     ob_exit(0);
 469 }
 470
 471 void ob_exit(gint code)
 472 {
 473     exitcode = code;
 474     ob_main_loop_exit(ob_main_loop);
 475 }
 476
 477 void ob_exit_replace()
 478 {
 479     exitcode = 0;
 480     being_replaced = TRUE;
 481     ob_main_loop_exit(ob_main_loop);
 482 }
 483
 484 Cursor ob_cursor(ObCursor cursor)
 485 {
 486     g_assert(cursor < OB_NUM_CURSORS);
 487     return cursors[cursor];
 488 }
 489
 490 KeyCode ob_keycode(ObKey key)
 491 {
 492     g_assert(key < OB_NUM_KEYS);
 493     return keys[key];
 494 }
 495
 496 ObState ob_state()
 497 {
 498     return state;
 499 }