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 static gboolean  being_replaced = FALSE;
  91
  92 static void signal_handler(gint signal, gpointer data);
  93 static void parse_args(gint argc, gchar **argv);
  94
  95 gint main(gint argc, gchar **argv)
  96 {
  97 #ifdef DEBUG
  98     ob_debug_show_output(TRUE);
  99 #endif
 100
 101     state = OB_STATE_STARTING;
 102
 103     /* initialize the locale */
 104     if (!setlocale(LC_ALL, ""))
 105         g_warning("Couldn't set locale from environment.\n");
 106     bindtextdomain(PACKAGE_NAME, LOCALEDIR);
 107     bind_textdomain_codeset(PACKAGE_NAME, "UTF-8");
 108     textdomain(PACKAGE_NAME);
 109
 110     g_set_prgname(argv[0]);
 111
 112     if (chdir(g_get_home_dir()) == -1)
 113         g_warning("Unable to change to home directory (%s): %s",
 114                   g_get_home_dir(), g_strerror(errno));
 115
 116     /* parse out command line args */
 117     parse_args(argc, argv);
 118
 119     if (!reconfigure_and_exit) {
 120         parse_paths_startup();
 121
 122         session_startup(argc, argv);
 123     }
 124
 125     ob_display = XOpenDisplay(NULL);
 126     if (ob_display == NULL)
 127         ob_exit_with_error("Failed to open the display.");
 128     if (fcntl(ConnectionNumber(ob_display), F_SETFD, 1) == -1)
 129         ob_exit_with_error("Failed to set display as close-on-exec.");
 130
 131     if (reconfigure_and_exit) {
 132         guint32 pid;
 133         gboolean ret;
 134
 135         prop_startup(); /* get atoms values for the display */
 136         ret = PROP_GET32(RootWindow(ob_display, DefaultScreen(ob_display)),
 137                                     openbox_pid, cardinal, &pid);
 138         XCloseDisplay(ob_display);
 139         if (!ret) {
 140             g_print("Openbox does not appear to be running on this "
 141                     "display.\n");
 142         } else {
 143             g_print("Telling the Openbox process # %u to reconfigure.\n", pid);
 144             ret = (kill(pid, SIGUSR2) == 0);
 145             if (!ret)
 146                 g_print("Error: %s.\n", strerror(errno));
 147         }
 148         exit(ret ? EXIT_SUCCESS : EXIT_FAILURE);
 149     }
 150
 151     ob_main_loop = ob_main_loop_new(ob_display);
 152
 153     /* set up signal handler */
 154     ob_main_loop_signal_add(ob_main_loop, SIGUSR1, signal_handler, NULL, NULL);
 155     ob_main_loop_signal_add(ob_main_loop, SIGUSR2, signal_handler, NULL, NULL);
 156     ob_main_loop_signal_add(ob_main_loop, SIGTERM, signal_handler, NULL, NULL);
 157     ob_main_loop_signal_add(ob_main_loop, SIGINT, signal_handler, NULL, NULL);
 158     ob_main_loop_signal_add(ob_main_loop, SIGHUP, signal_handler, NULL, NULL);
 159     ob_main_loop_signal_add(ob_main_loop, SIGPIPE, signal_handler, NULL, NULL);
 160     ob_main_loop_signal_add(ob_main_loop, SIGCHLD, signal_handler, NULL, NULL);
 161
 162     ob_screen = DefaultScreen(ob_display);
 163
 164     ob_rr_inst = RrInstanceNew(ob_display, ob_screen);
 165     if (ob_rr_inst == NULL)
 166         ob_exit_with_error("Failed to initialize the render library.");
 167
 168     XSynchronize(ob_display, xsync);
 169
 170     /* check for locale support */
 171     if (!XSupportsLocale())
 172         g_warning("X server does not support locale.");
 173     if (!XSetLocaleModifiers(""))
 174         g_warning("Cannot set locale modifiers for the X server.");
 175
 176     /* set our error handler */
 177     XSetErrorHandler(xerror_handler);
 178
 179     /* set the DISPLAY environment variable for any lauched children, to the
 180        display we're using, so they open in the right place. */
 181     putenv(g_strdup_printf("DISPLAY=%s", DisplayString(ob_display)));
 182
 183     /* create available cursors */
 184     cursors[OB_CURSOR_NONE] = None;
 185     cursors[OB_CURSOR_POINTER] =
 186         XCreateFontCursor(ob_display, XC_left_ptr);
 187     cursors[OB_CURSOR_BUSY] =
 188         XCreateFontCursor(ob_display, XC_watch);
 189     cursors[OB_CURSOR_MOVE] =
 190         XCreateFontCursor(ob_display, XC_fleur);
 191     cursors[OB_CURSOR_NORTH] =
 192         XCreateFontCursor(ob_display, XC_top_side);
 193     cursors[OB_CURSOR_NORTHEAST] =
 194         XCreateFontCursor(ob_display, XC_top_right_corner);
 195     cursors[OB_CURSOR_EAST] =
 196         XCreateFontCursor(ob_display, XC_right_side);
 197     cursors[OB_CURSOR_SOUTHEAST] =
 198         XCreateFontCursor(ob_display, XC_bottom_right_corner);
 199     cursors[OB_CURSOR_SOUTH] =
 200         XCreateFontCursor(ob_display, XC_bottom_side);
 201     cursors[OB_CURSOR_SOUTHWEST] =
 202         XCreateFontCursor(ob_display, XC_bottom_left_corner);
 203     cursors[OB_CURSOR_WEST] =
 204         XCreateFontCursor(ob_display, XC_left_side);
 205     cursors[OB_CURSOR_NORTHWEST] =
 206         XCreateFontCursor(ob_display, XC_top_left_corner);
 207
 208     /* create available keycodes */
 209     keys[OB_KEY_RETURN] =
 210         XKeysymToKeycode(ob_display, XStringToKeysym("Return"));
 211     keys[OB_KEY_ESCAPE] =
 212         XKeysymToKeycode(ob_display, XStringToKeysym("Escape"));
 213     keys[OB_KEY_LEFT] =
 214         XKeysymToKeycode(ob_display, XStringToKeysym("Left"));
 215     keys[OB_KEY_RIGHT] =
 216         XKeysymToKeycode(ob_display, XStringToKeysym("Right"));
 217     keys[OB_KEY_UP] =
 218         XKeysymToKeycode(ob_display, XStringToKeysym("Up"));
 219     keys[OB_KEY_DOWN] =
 220         XKeysymToKeycode(ob_display, XStringToKeysym("Down"));
 221
 222     prop_startup(); /* get atoms values for the display */
 223     extensions_query_all(); /* find which extensions are present */
 224
 225     if (screen_annex()) { /* it will be ours! */
 226         do {
 227             {
 228                 ObParseInst *i;
 229                 xmlDocPtr doc;
 230                 xmlNodePtr node;
 231
 232                 /* startup the parsing so everything can register sections
 233                    of the rc */
 234                 i = parse_startup();
 235
 236                 config_startup(i);
 237                 /* parse/load user options */
 238                 if (parse_load_rc(&doc, &node))
 239                     parse_tree(i, doc, node->xmlChildrenNode);
 240                 /* we're done with parsing now, kill it */
 241                 parse_close(doc);
 242                 parse_shutdown(i);
 243             }
 244
 245             /* load the theme specified in the rc file */
 246             {
 247                 RrTheme *theme;
 248                 if ((theme = RrThemeNew(ob_rr_inst, config_theme,
 249                                         config_font_activewindow,
 250                                         config_font_inactivewindow,
 251                                         config_font_menutitle,
 252                                         config_font_menuitem)))
 253                 {
 254                     RrThemeFree(ob_rr_theme);
 255                     ob_rr_theme = theme;
 256                 }
 257                 if (ob_rr_theme == NULL)
 258                     ob_exit_with_error("Unable to load a theme.");
 259             }
 260
 261             if (reconfigure) {
 262                 GList *it;
 263
 264                 /* update all existing windows for the new theme */
 265                 for (it = client_list; it; it = g_list_next(it)) {
 266                     ObClient *c = it->data;
 267                     frame_adjust_theme(c->frame);
 268                 }
 269             }
 270             event_startup(reconfigure);
 271             /* focus_backup is used for stacking, so this needs to come before
 272                anything that calls stacking_add */
 273             focus_startup(reconfigure);
 274             window_startup(reconfigure);
 275             sn_startup(reconfigure);
 276             screen_startup(reconfigure);
 277             grab_startup(reconfigure);
 278             group_startup(reconfigure);
 279             client_startup(reconfigure);
 280             dock_startup(reconfigure);
 281             moveresize_startup(reconfigure);
 282             keyboard_startup(reconfigure);
 283             mouse_startup(reconfigure);
 284             menu_startup(reconfigure);
 285
 286             if (!reconfigure) {
 287                 /* get all the existing windows */
 288                 client_manage_all();
 289                 focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 290             } else {
 291                 GList *it;
 292
 293                 /* redecorate all existing windows */
 294                 for (it = client_list; it; it = g_list_next(it)) {
 295                     ObClient *c = it->data;
 296                     /* the new config can change the window's decorations */
 297                     client_setup_decor_and_functions(c);
 298                     /* redraw the frames */
 299                     frame_adjust_area(c->frame, TRUE, TRUE, FALSE);
 300                 }
 301             }
 302
 303             reconfigure = FALSE;
 304
 305             state = OB_STATE_RUNNING;
 306             ob_main_loop_run(ob_main_loop);
 307             state = OB_STATE_EXITING;
 308
 309             if (!reconfigure) {
 310                 dock_remove_all();
 311                 client_unmanage_all();
 312             }
 313
 314             menu_shutdown(reconfigure);
 315             mouse_shutdown(reconfigure);
 316             keyboard_shutdown(reconfigure);
 317             moveresize_shutdown(reconfigure);
 318             dock_shutdown(reconfigure);
 319             client_shutdown(reconfigure);
 320             group_shutdown(reconfigure);
 321             grab_shutdown(reconfigure);
 322             screen_shutdown(reconfigure);
 323             focus_shutdown(reconfigure);
 324             sn_shutdown(reconfigure);
 325             window_shutdown(reconfigure);
 326             event_shutdown(reconfigure);
 327             config_shutdown();
 328         } while (reconfigure);
 329     }
 330
 331     XSync(ob_display, FALSE);
 332
 333     RrThemeFree(ob_rr_theme);
 334     RrInstanceFree(ob_rr_inst);
 335
 336     session_shutdown(being_replaced);
 337
 338     XCloseDisplay(ob_display);
 339
 340     parse_paths_shutdown();
 341
 342     if (restart) {
 343         if (restart_path != NULL) {
 344             gint argcp;
 345             gchar **argvp;
 346             GError *err = NULL;
 347
 348             /* run other window manager */
 349             if (g_shell_parse_argv(restart_path, &argcp, &argvp, &err)) {
 350                 execvp(argvp[0], argvp);
 351                 g_strfreev(argvp);
 352             } else {
 353                 g_warning("failed to execute '%s': %s", restart_path,
 354                           err->message);
 355                 g_error_free(err);
 356             }
 357         }
 358
 359         /* re-run me */
 360         execvp(argv[0], argv); /* try how we were run */
 361         execlp(argv[0], g_path_get_basename(argv[0]),
 362                (char *)NULL); /* last resort */
 363     }
 364
 365     return exitcode;
 366 }
 367
 368 static void signal_handler(gint signal, gpointer data)
 369 {
 370     switch (signal) {
 371     case SIGUSR1:
 372         ob_debug("Caught signal %d. Restarting.\n", signal);
 373         ob_restart();
 374         break;
 375     case SIGUSR2:
 376         ob_debug("Caught signal %d. Reconfiguring.\n", signal);
 377         ob_reconfigure();
 378         break;
 379     case SIGCHLD:
 380         /* reap children */
 381         while (waitpid(-1, NULL, WNOHANG) > 0);
 382         break;
 383     default:
 384         ob_debug("Caught signal %d. Exiting.\n", signal);
 385         /* TERM and INT return a 0 code */
 386         ob_exit(!(signal == SIGTERM || signal == SIGINT));
 387     }
 388 }
 389
 390 static void print_version()
 391 {
 392     g_print("Openbox %s\n", PACKAGE_VERSION);
 393     g_print("Copyright (c) 2006 Mikael Magnusson\n");
 394     g_print("Copyright (c) 2003 Ben Jansens\n\n");
 395     g_print("This program comes with ABSOLUTELY NO WARRANTY.\n");
 396     g_print("This is free software, and you are welcome to redistribute it\n");
 397     g_print("under certain conditions. See the file COPYING for details.\n\n");
 398 }
 399
 400 static void print_help()
 401 {
 402     g_print("Syntax: openbox [options]\n\n");
 403     g_print("Options:\n\n");
 404     g_print("  --reconfigure       Tell the currently running instance of "
 405             "Openbox to\n"
 406             "                      reconfigure (and then exit immediately)\n");
 407 #ifdef USE_SM
 408     g_print("  --sm-disable        Disable connection to session manager\n");
 409     g_print("  --sm-client-id ID   Specify session management ID\n");
 410     g_print("  --sm-save-file FILE Specify file to load a saved session"
 411             "from\n");
 412 #endif
 413     g_print("  --replace           Replace the currently running window "
 414             "manager\n");
 415     g_print("  --help              Display this help and exit\n");
 416     g_print("  --version           Display the version and exit\n");
 417     g_print("  --sync              Run in synchronous mode (this is slow and "
 418             "meant for\n"
 419             "                      debugging X routines)\n");
 420     g_print("  --debug             Display debugging output\n");
 421     g_print("\nPlease report bugs at %s\n\n", PACKAGE_BUGREPORT);
 422 }
 423
 424 static void parse_args(gint argc, gchar **argv)
 425 {
 426     gint i;
 427
 428     for (i = 1; i < argc; ++i) {
 429         if (!strcmp(argv[i], "--version")) {
 430             print_version();
 431             exit(0);
 432         } else if (!strcmp(argv[i], "--help")) {
 433             print_help();
 434             exit(0);
 435         } else if (!strcmp(argv[i], "--g-fatal-warnings")) {
 436             g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
 437         } else if (!strcmp(argv[i], "--replace")) {
 438             ob_replace_wm = TRUE;
 439         } else if (!strcmp(argv[i], "--sync")) {
 440             xsync = TRUE;
 441         } else if (!strcmp(argv[i], "--debug")) {
 442             ob_debug_show_output(TRUE);
 443         } else if (!strcmp(argv[i], "--reconfigure")) {
 444             reconfigure_and_exit = TRUE;
 445         }
 446     }
 447 }
 448
 449 void ob_exit_with_error(gchar *msg)
 450 {
 451     g_critical(msg);
 452     session_shutdown(TRUE);
 453     exit(EXIT_FAILURE);
 454 }
 455
 456 void ob_restart_other(const gchar *path)
 457 {
 458     restart_path = g_strdup(path);
 459     ob_restart();
 460 }
 461
 462 void ob_restart()
 463 {
 464     restart = TRUE;
 465     ob_exit(0);
 466 }
 467
 468 void ob_reconfigure()
 469 {
 470     reconfigure = TRUE;
 471     ob_exit(0);
 472 }
 473
 474 void ob_exit(gint code)
 475 {
 476     exitcode = code;
 477     ob_main_loop_exit(ob_main_loop);
 478 }
 479
 480 void ob_exit_replace()
 481 {
 482     exitcode = 0;
 483     being_replaced = TRUE;
 484     ob_main_loop_exit(ob_main_loop);
 485 }
 486
 487 Cursor ob_cursor(ObCursor cursor)
 488 {
 489     g_assert(cursor < OB_NUM_CURSORS);
 490     return cursors[cursor];
 491 }
 492
 493 KeyCode ob_keycode(ObKey key)
 494 {
 495     g_assert(key < OB_NUM_KEYS);
 496     return keys[key];
 497 }
 498
 499 ObState ob_state()
 500 {
 501     return state;
 502 }