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 #if USE_XCURSOR
  74 #include <X11/Xcursor/Xcursor.h>
  75 #endif
  76
  77 RrInstance *ob_rr_inst;
  78 RrTheme    *ob_rr_theme;
  79 ObMainLoop *ob_main_loop;
  80 Display    *ob_display;
  81 gint        ob_screen;
  82 gboolean    ob_replace_wm = FALSE;
  83
  84 static ObState   state;
  85 static gboolean  xsync = FALSE;
  86 static gboolean  reconfigure = FALSE;
  87 static gboolean  restart = FALSE;
  88 static gchar    *restart_path = NULL;
  89 static Cursor    cursors[OB_NUM_CURSORS];
  90 static KeyCode   keys[OB_NUM_KEYS];
  91 static gint      exitcode = 0;
  92 static guint     remote_control = 0;
  93 static gboolean  being_replaced = FALSE;
  94
  95 static void signal_handler(gint signal, gpointer data);
  96 static void parse_args(gint argc, gchar **argv);
  97 static Cursor load_cursor(const gchar *name, guint fontval);
  98
  99 gint main(gint argc, gchar **argv)
 100 {
 101 #ifdef DEBUG
 102     ob_debug_show_output(TRUE);
 103 #endif
 104
 105     state = OB_STATE_STARTING;
 106
 107     /* initialize the locale */
 108     if (!setlocale(LC_ALL, ""))
 109         g_warning("Couldn't set locale from environment.\n");
 110     bindtextdomain(PACKAGE_NAME, LOCALEDIR);
 111     bind_textdomain_codeset(PACKAGE_NAME, "UTF-8");
 112     textdomain(PACKAGE_NAME);
 113
 114     g_set_prgname(argv[0]);
 115
 116     if (chdir(g_get_home_dir()) == -1)
 117         g_warning("Unable to change to home directory (%s): %s",
 118                   g_get_home_dir(), g_strerror(errno));
 119
 120     /* parse out command line args */
 121     parse_args(argc, argv);
 122
 123     if (!remote_control) {
 124         parse_paths_startup();
 125
 126         session_startup(argc, argv);
 127     }
 128
 129     ob_display = XOpenDisplay(NULL);
 130     if (ob_display == NULL)
 131         ob_exit_with_error("Failed to open the display.");
 132     if (fcntl(ConnectionNumber(ob_display), F_SETFD, 1) == -1)
 133         ob_exit_with_error("Failed to set display as close-on-exec.");
 134
 135     if (remote_control) {
 136         prop_startup();
 137
 138         /* Send client message telling the OB process to:
 139          * remote_control = 1 -> reconfigure
 140          * remote_control = 2 -> restart */
 141         PROP_MSG(RootWindow(ob_display, ob_screen),
 142                  ob_control, remote_control, 0, 0, 0);
 143         XCloseDisplay(ob_display);
 144         exit(EXIT_SUCCESS);
 145     }
 146
 147     ob_main_loop = ob_main_loop_new(ob_display);
 148
 149     /* set up signal handler */
 150     ob_main_loop_signal_add(ob_main_loop, SIGUSR1, signal_handler, NULL, NULL);
 151     ob_main_loop_signal_add(ob_main_loop, SIGUSR2, signal_handler, NULL, NULL);
 152     ob_main_loop_signal_add(ob_main_loop, SIGTERM, signal_handler, NULL, NULL);
 153     ob_main_loop_signal_add(ob_main_loop, SIGINT, signal_handler, NULL, NULL);
 154     ob_main_loop_signal_add(ob_main_loop, SIGHUP, signal_handler, NULL, NULL);
 155     ob_main_loop_signal_add(ob_main_loop, SIGPIPE, signal_handler, NULL, NULL);
 156     ob_main_loop_signal_add(ob_main_loop, SIGCHLD, signal_handler, NULL, NULL);
 157
 158     ob_screen = DefaultScreen(ob_display);
 159
 160     ob_rr_inst = RrInstanceNew(ob_display, ob_screen);
 161     if (ob_rr_inst == NULL)
 162         ob_exit_with_error("Failed to initialize the render library.");
 163
 164     XSynchronize(ob_display, xsync);
 165
 166     /* check for locale support */
 167     if (!XSupportsLocale())
 168         g_warning("X server does not support locale.");
 169     if (!XSetLocaleModifiers(""))
 170         g_warning("Cannot set locale modifiers for the X server.");
 171
 172     /* set our error handler */
 173     XSetErrorHandler(xerror_handler);
 174
 175     /* set the DISPLAY environment variable for any lauched children, to the
 176        display we're using, so they open in the right place. */
 177     putenv(g_strdup_printf("DISPLAY=%s", DisplayString(ob_display)));
 178
 179     /* create available cursors */
 180     cursors[OB_CURSOR_NONE] = None;
 181     cursors[OB_CURSOR_POINTER] = load_cursor("left_ptr", XC_left_ptr);
 182     cursors[OB_CURSOR_BUSY] = load_cursor("left_ptr_watch", XC_watch);
 183     cursors[OB_CURSOR_MOVE] = load_cursor("fleur", XC_fleur);
 184     cursors[OB_CURSOR_NORTH] = load_cursor("top_side", XC_top_side);
 185     cursors[OB_CURSOR_NORTHEAST] = load_cursor("top_right_corner",
 186                                                XC_top_right_corner);
 187     cursors[OB_CURSOR_EAST] = load_cursor("right_side", XC_right_side);
 188     cursors[OB_CURSOR_SOUTHEAST] = load_cursor("bottom_right_corner",
 189                                                XC_bottom_right_corner);
 190     cursors[OB_CURSOR_SOUTH] = load_cursor("bottom_side", XC_bottom_side);
 191     cursors[OB_CURSOR_SOUTHWEST] = load_cursor("bottom_left_corner",
 192                                                XC_bottom_left_corner);
 193     cursors[OB_CURSOR_WEST] = load_cursor("left_side", XC_left_side);
 194     cursors[OB_CURSOR_NORTHWEST] = load_cursor("top_left_corner",
 195                                                XC_top_left_corner);
 196
 197     /* create available keycodes */
 198     keys[OB_KEY_RETURN] =
 199         XKeysymToKeycode(ob_display, XStringToKeysym("Return"));
 200     keys[OB_KEY_ESCAPE] =
 201         XKeysymToKeycode(ob_display, XStringToKeysym("Escape"));
 202     keys[OB_KEY_LEFT] =
 203         XKeysymToKeycode(ob_display, XStringToKeysym("Left"));
 204     keys[OB_KEY_RIGHT] =
 205         XKeysymToKeycode(ob_display, XStringToKeysym("Right"));
 206     keys[OB_KEY_UP] =
 207         XKeysymToKeycode(ob_display, XStringToKeysym("Up"));
 208     keys[OB_KEY_DOWN] =
 209         XKeysymToKeycode(ob_display, XStringToKeysym("Down"));
 210
 211     prop_startup(); /* get atoms values for the display */
 212     extensions_query_all(); /* find which extensions are present */
 213
 214     if (screen_annex()) { /* it will be ours! */
 215         do {
 216             {
 217                 ObParseInst *i;
 218                 xmlDocPtr doc;
 219                 xmlNodePtr node;
 220
 221                 /* startup the parsing so everything can register sections
 222                    of the rc */
 223                 i = parse_startup();
 224
 225                 config_startup(i);
 226                 /* parse/load user options */
 227                 if (parse_load_rc(&doc, &node))
 228                     parse_tree(i, doc, node->xmlChildrenNode);
 229                 /* we're done with parsing now, kill it */
 230                 parse_close(doc);
 231                 parse_shutdown(i);
 232             }
 233
 234             /* load the theme specified in the rc file */
 235             {
 236                 RrTheme *theme;
 237                 if ((theme = RrThemeNew(ob_rr_inst, config_theme,
 238                                         config_font_activewindow,
 239                                         config_font_inactivewindow,
 240                                         config_font_menutitle,
 241                                         config_font_menuitem)))
 242                 {
 243                     RrThemeFree(ob_rr_theme);
 244                     ob_rr_theme = theme;
 245                 }
 246                 if (ob_rr_theme == NULL)
 247                     ob_exit_with_error("Unable to load a theme.");
 248             }
 249
 250             if (reconfigure) {
 251                 GList *it;
 252
 253                 /* update all existing windows for the new theme */
 254                 for (it = client_list; it; it = g_list_next(it)) {
 255                     ObClient *c = it->data;
 256                     frame_adjust_theme(c->frame);
 257                 }
 258             }
 259             event_startup(reconfigure);
 260             /* focus_backup is used for stacking, so this needs to come before
 261                anything that calls stacking_add */
 262             focus_startup(reconfigure);
 263             window_startup(reconfigure);
 264             sn_startup(reconfigure);
 265             screen_startup(reconfigure);
 266             grab_startup(reconfigure);
 267             group_startup(reconfigure);
 268             client_startup(reconfigure);
 269             dock_startup(reconfigure);
 270             moveresize_startup(reconfigure);
 271             keyboard_startup(reconfigure);
 272             mouse_startup(reconfigure);
 273             menu_startup(reconfigure);
 274
 275             if (!reconfigure) {
 276                 /* get all the existing windows */
 277                 client_manage_all();
 278                 focus_fallback(TRUE);
 279             } else {
 280                 GList *it;
 281
 282                 /* redecorate all existing windows */
 283                 for (it = client_list; it; it = g_list_next(it)) {
 284                     ObClient *c = it->data;
 285                     /* the new config can change the window's decorations */
 286                     client_setup_decor_and_functions(c);
 287                     /* redraw the frames */
 288                     frame_adjust_area(c->frame, TRUE, TRUE, FALSE);
 289                 }
 290             }
 291
 292             reconfigure = FALSE;
 293
 294             state = OB_STATE_RUNNING;
 295             ob_main_loop_run(ob_main_loop);
 296             state = OB_STATE_EXITING;
 297
 298             if (!reconfigure) {
 299                 dock_remove_all();
 300                 client_unmanage_all();
 301             }
 302
 303             menu_shutdown(reconfigure);
 304             mouse_shutdown(reconfigure);
 305             keyboard_shutdown(reconfigure);
 306             moveresize_shutdown(reconfigure);
 307             dock_shutdown(reconfigure);
 308             client_shutdown(reconfigure);
 309             group_shutdown(reconfigure);
 310             grab_shutdown(reconfigure);
 311             screen_shutdown(reconfigure);
 312             focus_shutdown(reconfigure);
 313             sn_shutdown(reconfigure);
 314             window_shutdown(reconfigure);
 315             event_shutdown(reconfigure);
 316             config_shutdown();
 317         } while (reconfigure);
 318     }
 319
 320     XSync(ob_display, FALSE);
 321
 322     RrThemeFree(ob_rr_theme);
 323     RrInstanceFree(ob_rr_inst);
 324
 325     session_shutdown(being_replaced);
 326
 327     XCloseDisplay(ob_display);
 328
 329     parse_paths_shutdown();
 330
 331     if (restart) {
 332         if (restart_path != NULL) {
 333             gint argcp;
 334             gchar **argvp;
 335             GError *err = NULL;
 336
 337             /* run other window manager */
 338             if (g_shell_parse_argv(restart_path, &argcp, &argvp, &err)) {
 339                 execvp(argvp[0], argvp);
 340                 g_strfreev(argvp);
 341             } else {
 342                 g_warning("failed to execute '%s': %s", restart_path,
 343                           err->message);
 344                 g_error_free(err);
 345             }
 346         }
 347
 348         /* re-run me */
 349         execvp(argv[0], argv); /* try how we were run */
 350         execlp(argv[0], g_path_get_basename(argv[0]),
 351                (char *)NULL); /* last resort */
 352     }
 353
 354     return exitcode;
 355 }
 356
 357 static void signal_handler(gint signal, gpointer data)
 358 {
 359     switch (signal) {
 360     case SIGUSR1:
 361         ob_debug("Caught signal %d. Restarting.\n", signal);
 362         ob_restart();
 363         break;
 364     case SIGUSR2:
 365         ob_debug("Caught signal %d. Reconfiguring.\n", signal);
 366         ob_reconfigure();
 367         break;
 368     case SIGCHLD:
 369         /* reap children */
 370         while (waitpid(-1, NULL, WNOHANG) > 0);
 371         break;
 372     default:
 373         ob_debug("Caught signal %d. Exiting.\n", signal);
 374         /* TERM and INT return a 0 code */
 375         ob_exit(!(signal == SIGTERM || signal == SIGINT));
 376     }
 377 }
 378
 379 static void print_version()
 380 {
 381     g_print("Openbox %s\n", PACKAGE_VERSION);
 382     g_print("Copyright (c) 2007 Mikael Magnusson\n");
 383     g_print("Copyright (c) 2007 Dana Jansens\n\n");
 384     g_print("This program comes with ABSOLUTELY NO WARRANTY.\n");
 385     g_print("This is free software, and you are welcome to redistribute it\n");
 386     g_print("under certain conditions. See the file COPYING for details.\n\n");
 387 }
 388
 389 static void print_help()
 390 {
 391     g_print("Syntax: openbox [options]\n\n");
 392     g_print("Options:\n\n");
 393     g_print("  --reconfigure       Tell the currently running instance of "
 394             "Openbox to\n"
 395             "                      reconfigure (and then exit immediately)\n");
 396 #ifdef USE_SM
 397     g_print("  --sm-disable        Disable connection to session manager\n");
 398     g_print("  --sm-client-id ID   Specify session management ID\n");
 399     g_print("  --sm-save-file FILE Specify file to load a saved session"
 400             "from\n");
 401 #endif
 402     g_print("  --replace           Replace the currently running window "
 403             "manager\n");
 404     g_print("  --help              Display this help and exit\n");
 405     g_print("  --version           Display the version and exit\n");
 406     g_print("  --sync              Run in synchronous mode (this is slow and "
 407             "meant for\n"
 408             "                      debugging X routines)\n");
 409     g_print("  --debug             Display debugging output\n");
 410     g_print("\nPlease report bugs at %s\n\n", PACKAGE_BUGREPORT);
 411 }
 412
 413 static void parse_args(gint argc, gchar **argv)
 414 {
 415     gint i;
 416
 417     for (i = 1; i < argc; ++i) {
 418         if (!strcmp(argv[i], "--version")) {
 419             print_version();
 420             exit(0);
 421         } else if (!strcmp(argv[i], "--help")) {
 422             print_help();
 423             exit(0);
 424         } else if (!strcmp(argv[i], "--g-fatal-warnings")) {
 425             g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
 426         } else if (!strcmp(argv[i], "--replace")) {
 427             ob_replace_wm = TRUE;
 428         } else if (!strcmp(argv[i], "--sync")) {
 429             xsync = TRUE;
 430         } else if (!strcmp(argv[i], "--debug")) {
 431             ob_debug_show_output(TRUE);
 432         } else if (!strcmp(argv[i], "--reconfigure")) {
 433             remote_control = 1;
 434         } else if (!strcmp(argv[i], "--restart")) {
 435             remote_control = 2;
 436         }
 437     }
 438 }
 439
 440 static Cursor load_cursor(const gchar *name, guint fontval)
 441 {
 442     Cursor c = None;
 443
 444 #if USE_XCURSOR
 445     c = XcursorLibraryLoadCursor(ob_display, name);
 446 #endif
 447     if (c == None)
 448         c = XCreateFontCursor(ob_display, fontval);
 449     return c;
 450 }
 451
 452 void ob_exit_with_error(const gchar *msg)
 453 {
 454     g_critical(msg);
 455     session_shutdown(TRUE);
 456     exit(EXIT_FAILURE);
 457 }
 458
 459 void ob_restart_other(const gchar *path)
 460 {
 461     restart_path = g_strdup(path);
 462     ob_restart();
 463 }
 464
 465 void ob_restart()
 466 {
 467     restart = TRUE;
 468     ob_exit(0);
 469 }
 470
 471 void ob_reconfigure()
 472 {
 473     reconfigure = TRUE;
 474     ob_exit(0);
 475 }
 476
 477 void ob_exit(gint code)
 478 {
 479     exitcode = code;
 480     ob_main_loop_exit(ob_main_loop);
 481 }
 482
 483 void ob_exit_replace()
 484 {
 485     exitcode = 0;
 486     being_replaced = TRUE;
 487     ob_main_loop_exit(ob_main_loop);
 488 }
 489
 490 Cursor ob_cursor(ObCursor cursor)
 491 {
 492     g_assert(cursor < OB_NUM_CURSORS);
 493     return cursors[cursor];
 494 }
 495
 496 KeyCode ob_keycode(ObKey key)
 497 {
 498     g_assert(key < OB_NUM_KEYS);
 499     return keys[key];
 500 }
 501
 502 ObState ob_state()
 503 {
 504     return state;
 505 }