2 * awesome.c - awesome main functions
4 * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
29 #include <xcb/xtest.h>
30 #include <xcb/xcb_event.h>
44 #include "common/version.h"
45 #include "common/atoms.h"
46 #include "common/xcursor.h"
47 #include "common/xutil.h"
48 #include "common/backtrace.h"
55 xcb_query_tree_cookie_t tree_cookie
;
58 /** Call before exiting.
63 int screen_nbr
, nscreens
;
65 if(globalconf
.hooks
.exit
!= LUA_REFNIL
)
66 luaA_dofunction_from_registry(globalconf
.L
, globalconf
.hooks
.exit
, 0, 0);
68 signal_object_emit(globalconf
.L
, &global_signals
, "exit", 0);
72 /* reparent systray windows, otherwise they may die with their master */
73 for(int i
= 0; i
< globalconf
.embedded
.len
; i
++)
75 xcb_screen_t
*s
= xutil_screen_get(globalconf
.connection
,
76 globalconf
.embedded
.tab
[i
].phys_screen
);
77 xembed_window_unembed(globalconf
.connection
, globalconf
.embedded
.tab
[i
].win
, s
->root
);
80 /* do this only for real screen */
81 const xcb_setup_t
*setup
= xcb_get_setup(globalconf
.connection
);
82 nscreens
= setup
? xcb_setup_roots_length(setup
) : -1;
84 screen_nbr
< nscreens
;
86 systray_cleanup(screen_nbr
);
88 /* remap all clients since some WM won't handle them otherwise */
89 foreach(c
, globalconf
.clients
)
92 titlebar_client_detach(*c
);
95 xcb_flush(globalconf
.connection
);
97 xcb_disconnect(globalconf
.connection
);
100 lua_close(globalconf
.L
);
103 /** Scan X to find windows to manage.
108 int i
, phys_screen
, tree_c_len
;
109 const int screen_max
= xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
110 root_win_t root_wins
[screen_max
];
111 xcb_query_tree_reply_t
*tree_r
;
112 xcb_window_t
*wins
= NULL
;
113 xcb_get_window_attributes_reply_t
*attr_r
;
114 xcb_get_geometry_reply_t
*geom_r
;
117 for(phys_screen
= 0; phys_screen
< screen_max
; phys_screen
++)
119 /* Get the root window ID associated to this screen */
120 root_wins
[phys_screen
].id
= xutil_screen_get(globalconf
.connection
, phys_screen
)->root
;
122 /* Get the window tree associated to this screen */
123 root_wins
[phys_screen
].tree_cookie
= xcb_query_tree_unchecked(globalconf
.connection
,
124 root_wins
[phys_screen
].id
);
127 for(phys_screen
= 0; phys_screen
< screen_max
; phys_screen
++)
129 tree_r
= xcb_query_tree_reply(globalconf
.connection
,
130 root_wins
[phys_screen
].tree_cookie
,
136 /* Get the tree of the children windows of the current root window */
137 if(!(wins
= xcb_query_tree_children(tree_r
)))
138 fatal("cannot get tree children");
140 tree_c_len
= xcb_query_tree_children_length(tree_r
);
141 xcb_get_window_attributes_cookie_t attr_wins
[tree_c_len
];
142 xcb_get_property_cookie_t state_wins
[tree_c_len
];
144 for(i
= 0; i
< tree_c_len
; i
++)
146 attr_wins
[i
] = xcb_get_window_attributes_unchecked(globalconf
.connection
,
149 state_wins
[i
] = window_state_get_unchecked(wins
[i
]);
152 xcb_get_geometry_cookie_t
*geom_wins
[tree_c_len
];
154 for(i
= 0; i
< tree_c_len
; i
++)
156 attr_r
= xcb_get_window_attributes_reply(globalconf
.connection
,
160 state
= window_state_get_reply(state_wins
[i
]);
162 if(!attr_r
|| attr_r
->override_redirect
163 || attr_r
->map_state
== XCB_MAP_STATE_UNVIEWABLE
164 || state
== XCB_WM_STATE_WITHDRAWN
)
173 /* Get the geometry of the current window */
174 geom_wins
[i
] = p_alloca(xcb_get_geometry_cookie_t
, 1);
175 *(geom_wins
[i
]) = xcb_get_geometry_unchecked(globalconf
.connection
, wins
[i
]);
178 for(i
= 0; i
< tree_c_len
; i
++)
180 if(!geom_wins
[i
] || !(geom_r
= xcb_get_geometry_reply(globalconf
.connection
,
181 *(geom_wins
[i
]), NULL
)))
184 /* The window can be mapped, so force it to be undrawn for startup */
185 xcb_unmap_window(globalconf
.connection
, wins
[i
]);
187 client_manage(wins
[i
], geom_r
, phys_screen
, true);
197 a_refresh_cb(EV_P_ ev_prepare
*w
, int revents
)
203 a_xcb_check_cb(EV_P_ ev_check
*w
, int revents
)
205 xcb_generic_event_t
*mouse
= NULL
, *event
;
207 while((event
= xcb_poll_for_event(globalconf
.connection
)))
209 /* We will treat mouse events later.
210 * We cannot afford to treat all mouse motion events,
211 * because that would be too much CPU intensive, so we just
212 * take the last we get after a bunch of events. */
213 if(XCB_EVENT_RESPONSE_TYPE(event
) == XCB_MOTION_NOTIFY
)
220 xcb_event_handle(&globalconf
.evenths
, event
);
227 xcb_event_handle(&globalconf
.evenths
, mouse
);
233 a_xcb_io_cb(EV_P_ ev_io
*w
, int revents
)
238 /** Startup Error handler to check if another window manager
239 * is already running.
240 * \param data Additional optional parameters data.
241 * \param c X connection.
242 * \param error Error event.
244 static int __attribute__ ((noreturn
))
245 xerrorstart(void * data
__attribute__ ((unused
)),
246 xcb_connection_t
* c
__attribute__ ((unused
)),
247 xcb_generic_error_t
* error
__attribute__ ((unused
)))
249 fatal("another window manager is already running");
253 signal_fatal(int signum
)
257 fatal("dumping backtrace\n%s", buf
.s
);
260 /** Function to exit on some signals.
261 * \param w the signal received, unused
262 * \param revents currently unused
265 exit_on_signal(EV_P_ ev_signal
*w
, int revents
)
271 awesome_restart(void)
274 a_exec(globalconf
.argv
);
277 /** Function to restart aweome on some signals.
278 * \param w the signam received, unused
279 * \param revents Currently unused
282 restart_on_signal(EV_P_ ev_signal
*w
, int revents
)
287 /** \brief awesome xerror function.
288 * There's no way to check accesses to destroyed windows, thus those cases are
289 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
290 * default error handler, which may call exit.
291 * \param data Currently unused.
292 * \param c The connectiont to the X server.
293 * \param e The error event.
294 * \return 0 if no error, or xerror's xlib return status.
297 xerror(void *data
__attribute__ ((unused
)),
298 xcb_connection_t
*c
__attribute__ ((unused
)),
299 xcb_generic_error_t
*e
)
302 if(e
->error_code
== XCB_EVENT_ERROR_BAD_WINDOW
303 || (e
->error_code
== XCB_EVENT_ERROR_BAD_MATCH
304 && e
->major_code
== XCB_SET_INPUT_FOCUS
)
305 || (e
->error_code
== XCB_EVENT_ERROR_BAD_VALUE
306 && e
->major_code
== XCB_KILL_CLIENT
)
307 || (e
->major_code
== XCB_CONFIGURE_WINDOW
308 && e
->error_code
== XCB_EVENT_ERROR_BAD_MATCH
))
311 warn("X error: request=%s, error=%s",
312 xcb_event_get_request_label(e
->major_code
),
313 xcb_event_get_error_label(e
->error_code
));
318 /** Print help and exit(2) with given exit_code.
319 * \param exit_code The exit code.
321 static void __attribute__ ((noreturn
))
322 exit_help(int exit_code
)
324 FILE *outfile
= (exit_code
== EXIT_SUCCESS
) ? stdout
: stderr
;
326 "Usage: awesome [OPTION]\n\
327 -h, --help show help\n\
328 -v, --version show version\n\
329 -c, --config FILE configuration file to use\n\
330 -k, --check check configuration file syntax\n");
334 /** Hello, this is main.
335 * \param argc Who knows.
336 * \param argv Who knows.
337 * \return EXIT_SUCCESS I hope.
340 main(int argc
, char **argv
)
342 const char *confpath
= NULL
;
343 int xfd
, i
, screen_nbr
, opt
, colors_nbr
;
344 xcolor_init_request_t colors_reqs
[2];
347 static struct option long_options
[] =
349 { "help", 0, NULL
, 'h' },
350 { "version", 0, NULL
, 'v' },
351 { "config", 1, NULL
, 'c' },
352 { "check", 0, NULL
, 'k' },
356 /* event loop watchers */
357 ev_io xio
= { .fd
= -1 };
359 ev_prepare a_refresh
;
364 /* clear the globalconf structure */
365 p_clear(&globalconf
, 1);
366 globalconf
.keygrabber
= LUA_REFNIL
;
367 globalconf
.mousegrabber
= LUA_REFNIL
;
370 for(i
= 0; i
< argc
; i
++)
371 cmdlen
+= a_strlen(argv
[i
]) + 1;
373 globalconf
.argv
= p_new(char, cmdlen
);
374 a_strcpy(globalconf
.argv
, cmdlen
, argv
[0]);
376 for(i
= 1; i
< argc
; i
++)
378 a_strcat(globalconf
.argv
, cmdlen
, " ");
379 a_strcat(globalconf
.argv
, cmdlen
, argv
[i
]);
382 /* Text won't be printed correctly otherwise */
383 setlocale(LC_CTYPE
, "");
385 /* Get XDG basedir data */
392 while((opt
= getopt_long(argc
, argv
, "vhkc:",
393 long_options
, NULL
)) != -1)
400 exit_help(EXIT_SUCCESS
);
403 if(!luaA_parserc(&xdg
, confpath
, false))
405 fprintf(stderr
, "✘ Configuration file syntax error.\n");
410 fprintf(stderr
, "✔ Configuration file syntax OK.\n");
415 confpath
= a_strdup(optarg
);
417 fatal("-c option requires a file name");
421 globalconf
.loop
= ev_default_loop(0);
422 ev_timer_init(&globalconf
.timer
, &luaA_on_timer
, 0., 0.);
424 /* register function for signals */
425 ev_signal_init(&sigint
, exit_on_signal
, SIGINT
);
426 ev_signal_init(&sigterm
, exit_on_signal
, SIGTERM
);
427 ev_signal_init(&sighup
, restart_on_signal
, SIGHUP
);
428 ev_signal_start(globalconf
.loop
, &sigint
);
429 ev_signal_start(globalconf
.loop
, &sigterm
);
430 ev_signal_start(globalconf
.loop
, &sighup
);
431 ev_unref(globalconf
.loop
);
432 ev_unref(globalconf
.loop
);
433 ev_unref(globalconf
.loop
);
435 struct sigaction sa
= { .sa_handler
= signal_fatal
, .sa_flags
= 0 };
436 sigemptyset(&sa
.sa_mask
);
437 sigaction(SIGSEGV
, &sa
, 0);
440 globalconf
.connection
= xcb_connect(NULL
, &globalconf
.default_screen
);
441 if(xcb_connection_has_error(globalconf
.connection
))
442 fatal("cannot open display");
444 /* check for xtest extension */
445 const xcb_query_extension_reply_t
*xtest_query
;
446 xtest_query
= xcb_get_extension_data(globalconf
.connection
, &xcb_test_id
);
447 globalconf
.have_xtest
= xtest_query
->present
;
449 /* initiliaze dbus */
453 xcb_grab_server(globalconf
.connection
);
454 xcb_flush(globalconf
.connection
);
456 /* Get the file descriptor corresponding to the X connection */
457 xfd
= xcb_get_file_descriptor(globalconf
.connection
);
458 ev_io_init(&xio
, &a_xcb_io_cb
, xfd
, EV_READ
);
459 ev_io_start(globalconf
.loop
, &xio
);
460 ev_check_init(&xcheck
, &a_xcb_check_cb
);
461 ev_check_start(globalconf
.loop
, &xcheck
);
462 ev_unref(globalconf
.loop
);
463 ev_prepare_init(&a_refresh
, &a_refresh_cb
);
464 ev_prepare_start(globalconf
.loop
, &a_refresh
);
465 ev_unref(globalconf
.loop
);
467 /* Allocate a handler which will holds all errors and events */
468 xcb_event_handlers_init(globalconf
.connection
, &globalconf
.evenths
);
469 xutil_error_handler_catch_all_set(&globalconf
.evenths
, xerrorstart
, NULL
);
472 screen_nbr
< xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
475 const uint32_t select_input_val
= XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
;
477 /* This causes an error if some other window manager is running */
478 xcb_change_window_attributes(globalconf
.connection
,
479 xutil_screen_get(globalconf
.connection
, screen_nbr
)->root
,
480 XCB_CW_EVENT_MASK
, &select_input_val
);
483 /* Need to xcb_flush to validate error handler */
484 xcb_aux_sync(globalconf
.connection
);
486 /* Process all errors in the queue if any */
487 xcb_event_poll_for_event_loop(&globalconf
.evenths
);
489 /* Set the default xerror handler */
490 xutil_error_handler_catch_all_set(&globalconf
.evenths
, xerror
, NULL
);
492 /* Allocate the key symbols */
493 globalconf
.keysyms
= xcb_key_symbols_alloc(globalconf
.connection
);
494 xcb_get_modifier_mapping_cookie_t xmapping_cookie
=
495 xcb_get_modifier_mapping_unchecked(globalconf
.connection
);
497 /* init atom cache */
498 atoms_init(globalconf
.connection
);
500 /* init screens information */
503 /* init default font and colors */
504 colors_reqs
[0] = xcolor_init_unchecked(&globalconf
.colors
.fg
,
505 "black", sizeof("black") - 1);
507 colors_reqs
[1] = xcolor_init_unchecked(&globalconf
.colors
.bg
,
508 "white", sizeof("white") - 1);
510 globalconf
.font
= draw_font_new("sans 8");
512 for(colors_nbr
= 0; colors_nbr
< 2; colors_nbr
++)
513 xcolor_init_reply(colors_reqs
[colors_nbr
]);
515 xutil_lock_mask_get(globalconf
.connection
, xmapping_cookie
,
516 globalconf
.keysyms
, &globalconf
.numlockmask
,
517 &globalconf
.shiftlockmask
, &globalconf
.capslockmask
,
518 &globalconf
.modeswitchmask
);
520 /* do this only for real screen */
522 screen_nbr
< xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
525 /* select for events */
526 const uint32_t change_win_vals
[] =
528 XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
| XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY
529 | XCB_EVENT_MASK_ENTER_WINDOW
| XCB_EVENT_MASK_LEAVE_WINDOW
530 | XCB_EVENT_MASK_STRUCTURE_NOTIFY
531 | XCB_EVENT_MASK_PROPERTY_CHANGE
532 | XCB_EVENT_MASK_BUTTON_PRESS
533 | XCB_EVENT_MASK_BUTTON_RELEASE
534 | XCB_EVENT_MASK_FOCUS_CHANGE
537 xcb_change_window_attributes(globalconf
.connection
,
538 xutil_screen_get(globalconf
.connection
, screen_nbr
)->root
,
541 ewmh_init(screen_nbr
);
542 systray_init(screen_nbr
);
545 /* init spawn (sn) */
548 /* Parse and run configuration file */
549 if (!luaA_parserc(&xdg
, confpath
, true))
550 fatal("couldn't find any rc file");
554 /* scan existing windows */
557 /* process all errors in the queue if any */
558 xcb_event_poll_for_event_loop(&globalconf
.evenths
);
559 a_xcb_set_event_handlers();
560 a_xcb_set_property_handlers();
562 /* we will receive events, stop grabbing server */
563 xcb_ungrab_server(globalconf
.connection
);
564 xcb_flush(globalconf
.connection
);
566 /* main event loop */
567 ev_loop(globalconf
.loop
, 0);
569 /* cleanup event loop */
570 ev_ref(globalconf
.loop
);
571 ev_check_stop(globalconf
.loop
, &xcheck
);
572 ev_ref(globalconf
.loop
);
573 ev_prepare_stop(globalconf
.loop
, &a_refresh
);
574 ev_ref(globalconf
.loop
);
575 ev_io_stop(globalconf
.loop
, &xio
);
582 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80