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  reconfigure_and_exit = FALSE;
  90
  91 static void signal_handler(gint signal, gpointer data);
  92 static void parse_args(gint argc, gchar **argv);
  93
  94 gint main(gint argc, gchar **argv)
  95 {
  96 #ifdef DEBUG
  97     ob_debug_show_output(TRUE);
  98 #endif
  99
 100     state = OB_STATE_STARTING;
 101
 102     /* initialize the locale */
 103     if (!setlocale(LC_ALL, ""))
 104         g_warning("Couldn't set locale from environment.\n");
 105     bindtextdomain(PACKAGE_NAME, LOCALEDIR);
 106     bind_textdomain_codeset(PACKAGE_NAME, "UTF-8");
 107     textdomain(PACKAGE_NAME);
 108
 109     g_set_prgname(argv[0]);
 110
 111     if (chdir(g_get_home_dir()) == -1)
 112         g_warning("Unable to change to home directory (%s): %s",
 113                   g_get_home_dir(), g_strerror(errno));
 114
 115     /* parse out command line args */
 116     parse_args(argc, argv);
 117
 118     if (!reconfigure_and_exit) {
 119         parse_paths_startup();
 120
 121         session_startup(argc, argv);
 122     }
 123
 124     ob_display = XOpenDisplay(NULL);
 125     if (ob_display == NULL)
 126         ob_exit_with_error("Failed to open the display.");
 127     if (fcntl(ConnectionNumber(ob_display), F_SETFD, 1) == -1)
 128         ob_exit_with_error("Failed to set display as close-on-exec.");
 129
 130     if (reconfigure_and_exit) {
 131         guint32 pid;
 132         gboolean ret;
 133
 134         prop_startup(); /* get atoms values for the display */
 135         ret = PROP_GET32(RootWindow(ob_display, DefaultScreen(ob_display)),
 136                                     openbox_pid, cardinal, &pid);
 137         XCloseDisplay(ob_display);
 138         if (!ret) {
 139             g_print("Openbox does not appear to be running on this "
 140                     "display.\n");
 141         } else {
 142             g_print("Telling the Openbox process # %u to reconfigure.\n", pid);
 143             ret = (kill(pid, SIGUSR2) == 0);
 144             if (!ret)
 145                 g_print("Error: %s.\n", strerror(errno));
 146         }
 147         exit(ret ? EXIT_SUCCESS : EXIT_FAILURE);
 148     }
 149
 150     ob_main_loop = ob_main_loop_new(ob_display);
 151
 152     /* set up signal handler */
 153     ob_main_loop_signal_add(ob_main_loop, SIGUSR1, signal_handler, NULL, NULL);
 154     ob_main_loop_signal_add(ob_main_loop, SIGUSR2, signal_handler, NULL, NULL);
 155     ob_main_loop_signal_add(ob_main_loop, SIGTERM, signal_handler, NULL, NULL);
 156     ob_main_loop_signal_add(ob_main_loop, SIGINT, signal_handler, NULL, NULL);
 157     ob_main_loop_signal_add(ob_main_loop, SIGHUP, signal_handler, NULL, NULL);
 158     ob_main_loop_signal_add(ob_main_loop, SIGPIPE, signal_handler, NULL, NULL);
 159     ob_main_loop_signal_add(ob_main_loop, SIGCHLD, signal_handler, NULL, NULL);
 160
 161     ob_screen = DefaultScreen(ob_display);
 162
 163     ob_rr_inst = RrInstanceNew(ob_display, ob_screen);
 164     if (ob_rr_inst == NULL)
 165         ob_exit_with_error("Failed to initialize the render library.");
 166
 167     XSynchronize(ob_display, xsync);
 168
 169     /* check for locale support */
 170     if (!XSupportsLocale())
 171         g_warning("X server does not support locale.");
 172     if (!XSetLocaleModifiers(""))
 173         g_warning("Cannot set locale modifiers for the X server.");
 174
 175     /* set our error handler */
 176     XSetErrorHandler(xerror_handler);
 177
 178     /* set the DISPLAY environment variable for any lauched children, to the
 179        display we're using, so they open in the right place. */
 180     putenv(g_strdup_printf("DISPLAY=%s", DisplayString(ob_display)));
 181
 182     /* create available cursors */
 183     cursors[OB_CURSOR_NONE] = None;
 184     cursors[OB_CURSOR_POINTER] =
 185         XCreateFontCursor(ob_display, XC_left_ptr);
 186     cursors[OB_CURSOR_BUSY] =
 187         XCreateFontCursor(ob_display, XC_watch);
 188     cursors[OB_CURSOR_MOVE] =
 189         XCreateFontCursor(ob_display, XC_fleur);
 190     cursors[OB_CURSOR_NORTH] =
 191         XCreateFontCursor(ob_display, XC_top_side);
 192     cursors[OB_CURSOR_NORTHEAST] =
 193         XCreateFontCursor(ob_display, XC_top_right_corner);
 194     cursors[OB_CURSOR_EAST] =
 195         XCreateFontCursor(ob_display, XC_right_side);
 196     cursors[OB_CURSOR_SOUTHEAST] =
 197         XCreateFontCursor(ob_display, XC_bottom_right_corner);
 198     cursors[OB_CURSOR_SOUTH] =
 199         XCreateFontCursor(ob_display, XC_bottom_side);
 200     cursors[OB_CURSOR_SOUTHWEST] =
 201         XCreateFontCursor(ob_display, XC_bottom_left_corner);
 202     cursors[OB_CURSOR_WEST] =
 203         XCreateFontCursor(ob_display, XC_left_side);
 204     cursors[OB_CURSOR_NORTHWEST] =
 205         XCreateFontCursor(ob_display, XC_top_left_corner);
 206
 207     /* create available keycodes */
 208     keys[OB_KEY_RETURN] =
 209         XKeysymToKeycode(ob_display, XStringToKeysym("Return"));
 210     keys[OB_KEY_ESCAPE] =
 211         XKeysymToKeycode(ob_display, XStringToKeysym("Escape"));
 212     keys[OB_KEY_LEFT] =
 213         XKeysymToKeycode(ob_display, XStringToKeysym("Left"));
 214     keys[OB_KEY_RIGHT] =
 215         XKeysymToKeycode(ob_display, XStringToKeysym("Right"));
 216     keys[OB_KEY_UP] =
 217         XKeysymToKeycode(ob_display, XStringToKeysym("Up"));
 218     keys[OB_KEY_DOWN] =
 219         XKeysymToKeycode(ob_display, XStringToKeysym("Down"));
 220
 221     prop_startup(); /* get atoms values for the display */
 222     extensions_query_all(); /* find which extensions are present */
 223
 224     if (screen_annex()) { /* it will be ours! */
 225         do {
 226             {
 227                 ObParseInst *i;
 228                 xmlDocPtr doc;
 229                 xmlNodePtr node;
 230
 231                 /* startup the parsing so everything can register sections
 232                    of the rc */
 233                 i = parse_startup();
 234
 235                 config_startup(i);
 236                 /* parse/load user options */
 237                 if (parse_load_rc(&doc, &node))
 238                     parse_tree(i, doc, node->xmlChildrenNode);
 239                 /* we're done with parsing now, kill it */
 240                 parse_close(doc);
 241                 parse_shutdown(i);
 242             }
 243
 244             /* load the theme specified in the rc file */
 245             {
 246                 RrTheme *theme;
 247                 if ((theme = RrThemeNew(ob_rr_inst, config_theme,
 248                                         config_font_activewindow,
 249                                         config_font_inactivewindow,
 250                                         config_font_menutitle,
 251                                         config_font_menuitem)))
 252                 {
 253                     RrThemeFree(ob_rr_theme);
 254                     ob_rr_theme = theme;
 255                 }
 256                 if (ob_rr_theme == NULL)
 257                     ob_exit_with_error("Unable to load a theme.");
 258             }
 259
 260             if (reconfigure) {
 261                 GList *it;
 262
 263                 /* update all existing windows for the new theme */
 264                 for (it = client_list; it; it = g_list_next(it)) {
 265                     ObClient *c = it->data;
 266                     frame_adjust_theme(c->frame);
 267                 }
 268             }
 269             event_startup(reconfigure);
 270             /* focus_backup is used for stacking, so this needs to come before
 271                anything that calls stacking_add */
 272             focus_startup(reconfigure);
 273             window_startup(reconfigure);
 274             sn_startup(reconfigure);
 275             screen_startup(reconfigure);
 276             grab_startup(reconfigure);
 277             group_startup(reconfigure);
 278             client_startup(reconfigure);
 279             dock_startup(reconfigure);
 280             moveresize_startup(reconfigure);
 281             keyboard_startup(reconfigure);
 282             mouse_startup(reconfigure);
 283             menu_startup(reconfigure);
 284
 285             if (!reconfigure) {
 286                 /* get all the existing windows */
 287                 client_manage_all();
 288                 focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 289             } else {
 290                 GList *it;
 291
 292                 /* redecorate all existing windows */
 293                 for (it = client_list; it; it = g_list_next(it)) {
 294                     ObClient *c = it->data;
 295                     /* the new config can change the window's decorations */
 296                     client_setup_decor_and_functions(c);
 297                     /* redraw the frames */
 298                     frame_adjust_area(c->frame, TRUE, TRUE, FALSE);
 299                 }
 300             }
 301
 302             reconfigure = FALSE;
 303
 304             state = OB_STATE_RUNNING;
 305             ob_main_loop_run(ob_main_loop);
 306             state = OB_STATE_EXITING;
 307
 308             if (!reconfigure) {
 309                 dock_remove_all();
 310                 client_unmanage_all();
 311             }
 312
 313             menu_shutdown(reconfigure);
 314             mouse_shutdown(reconfigure);
 315             keyboard_shutdown(reconfigure);
 316             moveresize_shutdown(reconfigure);
 317             dock_shutdown(reconfigure);
 318             client_shutdown(reconfigure);
 319             group_shutdown(reconfigure);
 320             grab_shutdown(reconfigure);
 321             screen_shutdown(reconfigure);
 322             focus_shutdown(reconfigure);
 323             sn_shutdown(reconfigure);
 324             window_shutdown(reconfigure);
 325             event_shutdown(reconfigure);
 326             config_shutdown();
 327         } while (reconfigure);
 328     }
 329
 330     XSync(ob_display, FALSE);
 331
 332     RrThemeFree(ob_rr_theme);
 333     RrInstanceFree(ob_rr_inst);
 334
 335     session_shutdown();
 336
 337     XCloseDisplay(ob_display);
 338
 339     parse_paths_shutdown();
 340
 341     if (restart) {
 342         if (restart_path != NULL) {
 343             gint argcp;
 344             gchar **argvp;
 345             GError *err = NULL;
 346
 347             /* run other window manager */
 348             if (g_shell_parse_argv(restart_path, &argcp, &argvp, &err)) {
 349                 execvp(argvp[0], argvp);
 350                 g_strfreev(argvp);
 351             } else {
 352                 g_warning("failed to execute '%s': %s", restart_path,
 353                           err->message);
 354                 g_error_free(err);
 355             }
 356         }
 357
 358         /* re-run me */
 359         execvp(argv[0], argv); /* try how we were run */
 360         execlp(argv[0], g_path_get_basename(argv[0]),
 361                (char *)NULL); /* last resort */
 362     }
 363
 364     return exitcode;
 365 }
 366
 367 static void signal_handler(gint signal, gpointer data)
 368 {
 369     switch (signal) {
 370     case SIGUSR1:
 371         ob_debug("Caught signal %d. Restarting.\n", signal);
 372         ob_restart();
 373         break;
 374     case SIGUSR2:
 375         ob_debug("Caught signal %d. Reconfiguring.\n", signal);
 376         ob_reconfigure();
 377         break;
 378     case SIGCHLD:
 379         /* reap children */
 380         while (waitpid(-1, NULL, WNOHANG) > 0);
 381         break;
 382     default:
 383         ob_debug("Caught signal %d. Exiting.\n", signal);
 384         /* TERM and INT return a 0 code */
 385         ob_exit(!(signal == SIGTERM || signal == SIGINT));
 386     }
 387 }
 388
 389 static void print_version()
 390 {
 391     g_print("Openbox %s\n", PACKAGE_VERSION);
 392     g_print("Copyright (c) 2006 Mikael Magnusson\n");
 393     g_print("Copyright (c) 2003 Ben Jansens\n\n");
 394     g_print("This program comes with ABSOLUTELY NO WARRANTY.\n");
 395     g_print("This is free software, and you are welcome to redistribute it\n");
 396     g_print("under certain conditions. See the file COPYING for details.\n\n");
 397 }
 398
 399 static void print_help()
 400 {
 401     g_print("Syntax: openbox [options]\n\n");
 402     g_print("Options:\n\n");
 403     g_print("  --reconfigure       Tell the currently running instance of "
 404             "Openbox to\n"
 405             "                      reconfigure (and then exit immediately)\n");
 406 #ifdef USE_SM
 407     g_print("  --sm-disable        Disable connection to session manager\n");
 408     g_print("  --sm-client-id ID   Specify session management ID\n");
 409     g_print("  --sm-save-file FILE Specify file to load a saved session"
 410             "from\n");
 411 #endif
 412     g_print("  --replace           Replace the currently running window "
 413             "manager\n");
 414     g_print("  --help              Display this help and exit\n");
 415     g_print("  --version           Display the version and exit\n");
 416     g_print("  --sync              Run in synchronous mode (this is slow and "
 417             "meant for\n"
 418             "                      debugging X routines)\n");
 419     g_print("  --debug             Display debugging output\n");
 420     g_print("\nPlease report bugs at %s\n\n", PACKAGE_BUGREPORT);
 421 }
 422
 423 static void parse_args(gint argc, gchar **argv)
 424 {
 425     gint i;
 426
 427     for (i = 1; i < argc; ++i) {
 428         if (!strcmp(argv[i], "--version")) {
 429             print_version();
 430             exit(0);
 431         } else if (!strcmp(argv[i], "--help")) {
 432             print_help();
 433             exit(0);
 434         } else if (!strcmp(argv[i], "--g-fatal-warnings")) {
 435             g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
 436         } else if (!strcmp(argv[i], "--replace")) {
 437             ob_replace_wm = TRUE;
 438         } else if (!strcmp(argv[i], "--sync")) {
 439             xsync = TRUE;
 440         } else if (!strcmp(argv[i], "--debug")) {
 441             ob_debug_show_output(TRUE);
 442         } else if (!strcmp(argv[i], "--reconfigure")) {
 443             reconfigure_and_exit = TRUE;
 444         }
 445     }
 446 }
 447
 448 void ob_exit_with_error(gchar *msg)
 449 {
 450     g_critical(msg);
 451     session_shutdown();
 452     exit(EXIT_FAILURE);
 453 }
 454
 455 void ob_restart_other(const gchar *path)
 456 {
 457     restart_path = g_strdup(path);
 458     ob_restart();
 459 }
 460
 461 void ob_restart()
 462 {
 463     restart = TRUE;
 464     ob_exit(0);
 465 }
 466
 467 void ob_reconfigure()
 468 {
 469     reconfigure = TRUE;
 470     ob_exit(0);
 471 }
 472
 473 void ob_exit(gint code)
 474 {
 475     exitcode = code;
 476     ob_main_loop_exit(ob_main_loop);
 477 }
 478
 479 Cursor ob_cursor(ObCursor cursor)
 480 {
 481     g_assert(cursor < OB_NUM_CURSORS);
 482     return cursors[cursor];
 483 }
 484
 485 KeyCode ob_keycode(ObKey key)
 486 {
 487     g_assert(key < OB_NUM_KEYS);
 488     return keys[key];
 489 }
 490
 491 ObState ob_state()
 492 {
 493     return state;
 494 }