/* * awesome.c - awesome main functions * * Copyright © 2007-2008 Julien Danjou * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include "awesome.h" #include "spawn.h" #include "objects/client.h" #include "xwindow.h" #include "ewmh.h" #include "dbus.h" #include "systray.h" #include "event.h" #include "property.h" #include "screen.h" #include "luaa.h" #include "common/version.h" #include "common/atoms.h" #include "common/xcursor.h" #include "common/xutil.h" #include "common/backtrace.h" awesome_t globalconf; /** argv used to run awesome */ static char *awesome_argv; /** Call before exiting. */ void awesome_atexit(bool restart) { lua_pushboolean(globalconf.L, restart); signal_object_emit(globalconf.L, &global_signals, "exit", 1); a_dbus_cleanup(); systray_cleanup(); /* Close Lua */ lua_close(globalconf.L); /* X11 is a great protocol. There is a save-set so that reparenting WMs * don't kill clients when they shut down. However, when a focused windows * is saved, the focus will move to its parent with revert-to none. * Immediately afterwards, this parent is destroyed and the focus is gone. * Work around this by placing the focus where we like it to be. */ xcb_set_input_focus(globalconf.connection, XCB_INPUT_FOCUS_POINTER_ROOT, XCB_NONE, XCB_CURRENT_TIME); xcb_aux_sync(globalconf.connection); /* Disconnect *after* closing lua */ xcb_cursor_context_free(globalconf.cursor_ctx); xcb_disconnect(globalconf.connection); } /** Scan X to find windows to manage. */ static void scan(xcb_query_tree_cookie_t tree_c) { int i, tree_c_len; xcb_query_tree_reply_t *tree_r; xcb_window_t *wins = NULL; xcb_get_window_attributes_reply_t *attr_r; xcb_get_geometry_reply_t *geom_r; long state; tree_r = xcb_query_tree_reply(globalconf.connection, tree_c, NULL); if(!tree_r) return; /* Get the tree of the children windows of the current root window */ if(!(wins = xcb_query_tree_children(tree_r))) fatal("cannot get tree children"); tree_c_len = xcb_query_tree_children_length(tree_r); xcb_get_window_attributes_cookie_t attr_wins[tree_c_len]; xcb_get_property_cookie_t state_wins[tree_c_len]; for(i = 0; i < tree_c_len; i++) { attr_wins[i] = xcb_get_window_attributes_unchecked(globalconf.connection, wins[i]); state_wins[i] = xwindow_get_state_unchecked(wins[i]); } xcb_get_geometry_cookie_t *geom_wins[tree_c_len]; for(i = 0; i < tree_c_len; i++) { attr_r = xcb_get_window_attributes_reply(globalconf.connection, attr_wins[i], NULL); state = xwindow_get_state_reply(state_wins[i]); if(!attr_r || attr_r->override_redirect || attr_r->map_state == XCB_MAP_STATE_UNMAPPED || state == XCB_ICCCM_WM_STATE_WITHDRAWN) { geom_wins[i] = NULL; p_delete(&attr_r); continue; } p_delete(&attr_r); /* Get the geometry of the current window */ geom_wins[i] = p_alloca(xcb_get_geometry_cookie_t, 1); *(geom_wins[i]) = xcb_get_geometry_unchecked(globalconf.connection, wins[i]); } for(i = 0; i < tree_c_len; i++) { if(!geom_wins[i] || !(geom_r = xcb_get_geometry_reply(globalconf.connection, *(geom_wins[i]), NULL))) continue; client_manage(wins[i], geom_r, true); p_delete(&geom_r); } p_delete(&tree_r); } static void a_xcb_check(void) { xcb_generic_event_t *mouse = NULL, *event; while((event = xcb_poll_for_event(globalconf.connection))) { /* We will treat mouse events later. * We cannot afford to treat all mouse motion events, * because that would be too much CPU intensive, so we just * take the last we get after a bunch of events. */ if(XCB_EVENT_RESPONSE_TYPE(event) == XCB_MOTION_NOTIFY) { p_delete(&mouse); mouse = event; } else { uint8_t type = XCB_EVENT_RESPONSE_TYPE(event); if(mouse && (type == XCB_ENTER_NOTIFY || type == XCB_LEAVE_NOTIFY || type == XCB_BUTTON_PRESS || type == XCB_BUTTON_RELEASE)) { /* Make sure enter/motion/leave/press/release events are handled * in the correct order */ event_handle(mouse); p_delete(&mouse); } event_handle(event); p_delete(&event); } } if(mouse) { event_handle(mouse); p_delete(&mouse); } } static gboolean a_xcb_io_cb(GIOChannel *source, GIOCondition cond, gpointer data) { /* a_xcb_check() already handled all events */ if(xcb_connection_has_error(globalconf.connection)) fatal("X server connection broke (error %d)", xcb_connection_has_error(globalconf.connection)); return TRUE; } static gint a_glib_poll(GPollFD *ufds, guint nfsd, gint timeout) { guint res; awesome_refresh(); res = g_poll(ufds, nfsd, timeout); a_xcb_check(); return res; } static void signal_fatal(int signum) { buffer_t buf; backtrace_get(&buf); fatal("signal %d, dumping backtrace\n%s", signum, buf.s); } /** Function to exit on some signals. * \param data currently unused */ static gboolean exit_on_signal(gpointer data) { g_main_loop_quit(globalconf.loop); return TRUE; } void awesome_restart(void) { awesome_atexit(true); a_exec(awesome_argv); } /** Function to restart awesome on some signals. * \param data currently unused */ static gboolean restart_on_signal(gpointer data) { awesome_restart(); return TRUE; } /** Print help and exit(2) with given exit_code. * \param exit_code The exit code. */ static void __attribute__ ((noreturn)) exit_help(int exit_code) { FILE *outfile = (exit_code == EXIT_SUCCESS) ? stdout : stderr; fprintf(outfile, "Usage: awesome [OPTION]\n\ -h, --help show help\n\ -v, --version show version\n\ -c, --config FILE configuration file to use\n\ -k, --check check configuration file syntax\n"); exit(exit_code); } /** Hello, this is main. * \param argc Who knows. * \param argv Who knows. * \return EXIT_SUCCESS I hope. */ int main(int argc, char **argv) { char *confpath = NULL; int xfd, i, opt; ssize_t cmdlen = 1; xdgHandle xdg; bool no_argb = false; bool run_test = false; xcb_generic_event_t *event; xcb_query_tree_cookie_t tree_c; static struct option long_options[] = { { "help", 0, NULL, 'h' }, { "version", 0, NULL, 'v' }, { "config", 1, NULL, 'c' }, { "check", 0, NULL, 'k' }, { "no-argb", 0, NULL, 'a' }, { NULL, 0, NULL, 0 } }; /* clear the globalconf structure */ p_clear(&globalconf, 1); globalconf.keygrabber = LUA_REFNIL; globalconf.mousegrabber = LUA_REFNIL; buffer_init(&globalconf.startup_errors); /* save argv */ for(i = 0; i < argc; i++) cmdlen += a_strlen(argv[i]) + 1; awesome_argv = p_new(char, cmdlen); a_strcpy(awesome_argv, cmdlen, argv[0]); for(i = 1; i < argc; i++) { a_strcat(awesome_argv, cmdlen, " "); a_strcat(awesome_argv, cmdlen, argv[i]); } /* Text won't be printed correctly otherwise */ setlocale(LC_CTYPE, ""); /* Get XDG basedir data */ xdgInitHandle(&xdg); /* init lua */ luaA_init(&xdg); /* check args */ while((opt = getopt_long(argc, argv, "vhkc:a", long_options, NULL)) != -1) switch(opt) { case 'v': eprint_version(); break; case 'h': exit_help(EXIT_SUCCESS); break; case 'k': run_test = true; break; case 'c': if(a_strlen(optarg)) confpath = a_strdup(optarg); else fatal("-c option requires a file name"); break; case 'a': no_argb = true; break; } if (run_test) { if(!luaA_parserc(&xdg, confpath, false)) { fprintf(stderr, "✘ Configuration file syntax error.\n"); return EXIT_FAILURE; } else { fprintf(stderr, "✔ Configuration file syntax OK.\n"); return EXIT_SUCCESS; } } /* register function for signals */ g_unix_signal_add(SIGINT, exit_on_signal, NULL); g_unix_signal_add(SIGTERM, exit_on_signal, NULL); g_unix_signal_add(SIGHUP, restart_on_signal, NULL); struct sigaction sa = { .sa_handler = signal_fatal, .sa_flags = 0 }; sigemptyset(&sa.sa_mask); sigaction(SIGSEGV, &sa, 0); /* We have no clue where the input focus is right now */ globalconf.focus.need_update = true; /* X stuff */ globalconf.connection = xcb_connect(NULL, &globalconf.default_screen); if(xcb_connection_has_error(globalconf.connection)) fatal("cannot open display (error %d)", xcb_connection_has_error(globalconf.connection)); globalconf.screen = xcb_aux_get_screen(globalconf.connection, globalconf.default_screen); globalconf.default_visual = draw_default_visual(globalconf.screen); if(!no_argb) globalconf.visual = draw_argb_visual(globalconf.screen); if(!globalconf.visual) globalconf.visual = globalconf.default_visual; globalconf.default_depth = draw_visual_depth(globalconf.screen, globalconf.visual->visual_id); globalconf.default_cmap = globalconf.screen->default_colormap; if(globalconf.default_depth != globalconf.screen->root_depth) { // We need our own color map if we aren't using the default depth globalconf.default_cmap = xcb_generate_id(globalconf.connection); xcb_create_colormap(globalconf.connection, XCB_COLORMAP_ALLOC_NONE, globalconf.default_cmap, globalconf.screen->root, globalconf.visual->visual_id); } /* Prefetch all the extensions we might need */ xcb_prefetch_extension_data(globalconf.connection, &xcb_big_requests_id); xcb_prefetch_extension_data(globalconf.connection, &xcb_test_id); xcb_prefetch_extension_data(globalconf.connection, &xcb_randr_id); xcb_prefetch_extension_data(globalconf.connection, &xcb_xinerama_id); xcb_prefetch_extension_data(globalconf.connection, &xcb_shape_id); if (xcb_cursor_context_new(globalconf.connection, globalconf.screen, &globalconf.cursor_ctx) < 0) fatal("Failed to initialize xcb-cursor"); /* Setup the main context */ g_main_context_set_poll_func(g_main_context_default(), &a_glib_poll); /* initialize dbus */ a_dbus_init(); /* Get the file descriptor corresponding to the X connection */ xfd = xcb_get_file_descriptor(globalconf.connection); GIOChannel *channel = g_io_channel_unix_new(xfd); g_io_add_watch(channel, G_IO_IN, a_xcb_io_cb, NULL); g_io_channel_unref(channel); /* Grab server */ xcb_grab_server(globalconf.connection); /* Make sure there are no pending events. Since we didn't really do anything * at all yet, we will just discard all events which we received so far. * The above GrabServer should make sure no new events are generated. */ xcb_aux_sync(globalconf.connection); while ((event = xcb_poll_for_event(globalconf.connection)) != NULL) { /* Make sure errors are printed */ uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event); if(response_type == 0) event_handle(event); p_delete(&event); } { const uint32_t select_input_val = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT; /* This causes an error if some other window manager is running */ xcb_change_window_attributes(globalconf.connection, globalconf.screen->root, XCB_CW_EVENT_MASK, &select_input_val); } /* Need to xcb_flush to validate error handler */ xcb_aux_sync(globalconf.connection); /* Process all errors in the queue if any. There can be no events yet, so if * this function returns something, it must be an error. */ if (xcb_poll_for_event(globalconf.connection) != NULL) fatal("another window manager is already running"); /* Prefetch the maximum request length */ xcb_prefetch_maximum_request_length(globalconf.connection); /* check for xtest extension */ const xcb_query_extension_reply_t *query; query = xcb_get_extension_data(globalconf.connection, &xcb_test_id); globalconf.have_xtest = query->present; /* check for shape extension */ query = xcb_get_extension_data(globalconf.connection, &xcb_shape_id); globalconf.have_shape = query->present; /* Allocate the key symbols */ globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection); xcb_get_modifier_mapping_cookie_t xmapping_cookie = xcb_get_modifier_mapping_unchecked(globalconf.connection); /* init atom cache */ atoms_init(globalconf.connection); /* init screens information */ screen_scan(); xutil_lock_mask_get(globalconf.connection, xmapping_cookie, globalconf.keysyms, &globalconf.numlockmask, &globalconf.shiftlockmask, &globalconf.capslockmask, &globalconf.modeswitchmask); /* do this only for real screen */ ewmh_init(); systray_init(); /* init spawn (sn) */ spawn_init(); /* The default GC is just a newly created associated with a window with * depth globalconf.default_depth */ xcb_window_t tmp_win = xcb_generate_id(globalconf.connection); globalconf.gc = xcb_generate_id(globalconf.connection); xcb_create_window(globalconf.connection, globalconf.default_depth, tmp_win, globalconf.screen->root, -1, -1, 1, 1, 0, XCB_COPY_FROM_PARENT, globalconf.visual->visual_id, XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_COLORMAP, (const uint32_t []) { globalconf.screen->black_pixel, globalconf.screen->black_pixel, globalconf.default_cmap }); xcb_create_gc(globalconf.connection, globalconf.gc, tmp_win, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND, (const uint32_t[]) { globalconf.screen->black_pixel, globalconf.screen->white_pixel }); xcb_destroy_window(globalconf.connection, tmp_win); /* Get the window tree associated to this screen */ tree_c = xcb_query_tree_unchecked(globalconf.connection, globalconf.screen->root); xcb_change_window_attributes(globalconf.connection, globalconf.screen->root, XCB_CW_EVENT_MASK, ROOT_WINDOW_EVENT_MASK); /* we will receive events, stop grabbing server */ xcb_ungrab_server(globalconf.connection); xcb_flush(globalconf.connection); /* Parse and run configuration file */ if (!luaA_parserc(&xdg, confpath, true)) fatal("couldn't find any rc file"); p_delete(&confpath); xdgWipeHandle(&xdg); /* scan existing windows */ scan(tree_c); xcb_flush(globalconf.connection); /* main event loop */ globalconf.loop = g_main_loop_new(NULL, FALSE); g_main_loop_run(globalconf.loop); g_main_loop_unref(globalconf.loop); globalconf.loop = NULL; awesome_atexit(false); return EXIT_SUCCESS; } // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80