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/bigreq.h>
30 #include <xcb/randr.h>
31 #include <xcb/shape.h>
32 #include <xcb/xcb_event.h>
33 #include <xcb/xinerama.h>
34 #include <xcb/xtest.h>
48 #include "common/version.h"
49 #include "common/atoms.h"
50 #include "common/xcursor.h"
51 #include "common/xutil.h"
52 #include "common/backtrace.h"
59 xcb_query_tree_cookie_t tree_cookie
;
62 /** Call before exiting.
65 awesome_atexit(bool restart
)
67 int screen_nbr
, nscreens
;
69 if(globalconf
.hooks
.exit
!= LUA_REFNIL
)
70 luaA_dofunction_from_registry(globalconf
.L
, globalconf
.hooks
.exit
, 0, 0);
72 lua_pushboolean(globalconf
.L
, restart
);
73 signal_object_emit(globalconf
.L
, &global_signals
, "exit", 1);
77 /* do this only for real screen */
78 const xcb_setup_t
*setup
= xcb_get_setup(globalconf
.connection
);
79 nscreens
= setup
? xcb_setup_roots_length(setup
) : -1;
81 screen_nbr
< nscreens
;
83 systray_cleanup(screen_nbr
);
86 lua_close(globalconf
.L
);
88 xcb_flush(globalconf
.connection
);
90 /* Disconnect *after* closing lua */
91 xcb_disconnect(globalconf
.connection
);
96 /** Scan X to find windows to manage.
101 int i
, phys_screen
, tree_c_len
;
102 const int screen_max
= xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
103 root_win_t root_wins
[screen_max
];
104 xcb_query_tree_reply_t
*tree_r
;
105 xcb_window_t
*wins
= NULL
;
106 xcb_get_window_attributes_reply_t
*attr_r
;
107 xcb_get_geometry_reply_t
*geom_r
;
110 for(phys_screen
= 0; phys_screen
< screen_max
; phys_screen
++)
112 /* Get the root window ID associated to this screen */
113 root_wins
[phys_screen
].id
= xutil_screen_get(globalconf
.connection
, phys_screen
)->root
;
115 /* Get the window tree associated to this screen */
116 root_wins
[phys_screen
].tree_cookie
= xcb_query_tree_unchecked(globalconf
.connection
,
117 root_wins
[phys_screen
].id
);
120 for(phys_screen
= 0; phys_screen
< screen_max
; phys_screen
++)
122 tree_r
= xcb_query_tree_reply(globalconf
.connection
,
123 root_wins
[phys_screen
].tree_cookie
,
129 /* Get the tree of the children windows of the current root window */
130 if(!(wins
= xcb_query_tree_children(tree_r
)))
131 fatal("cannot get tree children");
133 tree_c_len
= xcb_query_tree_children_length(tree_r
);
134 xcb_get_window_attributes_cookie_t attr_wins
[tree_c_len
];
135 xcb_get_property_cookie_t state_wins
[tree_c_len
];
137 for(i
= 0; i
< tree_c_len
; i
++)
139 attr_wins
[i
] = xcb_get_window_attributes_unchecked(globalconf
.connection
,
142 state_wins
[i
] = window_state_get_unchecked(wins
[i
]);
145 xcb_get_geometry_cookie_t
*geom_wins
[tree_c_len
];
147 for(i
= 0; i
< tree_c_len
; i
++)
149 attr_r
= xcb_get_window_attributes_reply(globalconf
.connection
,
153 state
= window_state_get_reply(state_wins
[i
]);
155 if(!attr_r
|| attr_r
->override_redirect
156 || attr_r
->map_state
== XCB_MAP_STATE_UNMAPPED
157 || state
== XCB_ICCCM_WM_STATE_WITHDRAWN
)
166 /* Get the geometry of the current window */
167 geom_wins
[i
] = p_alloca(xcb_get_geometry_cookie_t
, 1);
168 *(geom_wins
[i
]) = xcb_get_geometry_unchecked(globalconf
.connection
, wins
[i
]);
171 for(i
= 0; i
< tree_c_len
; i
++)
173 if(!geom_wins
[i
] || !(geom_r
= xcb_get_geometry_reply(globalconf
.connection
,
174 *(geom_wins
[i
]), NULL
)))
177 /* The window can be mapped, so force it to be undrawn for startup */
178 xcb_unmap_window(globalconf
.connection
, wins
[i
]);
180 client_manage(wins
[i
], geom_r
, phys_screen
, true);
190 a_refresh_cb(EV_P_ ev_prepare
*w
, int revents
)
196 a_xcb_check_cb(EV_P_ ev_check
*w
, int revents
)
198 xcb_generic_event_t
*mouse
= NULL
, *event
;
200 while((event
= xcb_poll_for_event(globalconf
.connection
)))
202 /* We will treat mouse events later.
203 * We cannot afford to treat all mouse motion events,
204 * because that would be too much CPU intensive, so we just
205 * take the last we get after a bunch of events. */
206 if(XCB_EVENT_RESPONSE_TYPE(event
) == XCB_MOTION_NOTIFY
)
226 a_xcb_io_cb(EV_P_ ev_io
*w
, int revents
)
228 /* a_xcb_check_cb() already handled all events */
230 if(xcb_connection_has_error(globalconf
.connection
))
231 fatal("X server connection broke");
235 signal_fatal(int signum
)
239 fatal("dumping backtrace\n%s", buf
.s
);
242 /** Function to exit on some signals.
243 * \param w the signal received, unused
244 * \param revents currently unused
247 exit_on_signal(EV_P_ ev_signal
*w
, int revents
)
253 awesome_restart(void)
255 awesome_atexit(true);
256 a_exec(globalconf
.argv
);
259 /** Function to restart awesome on some signals.
260 * \param w the signal received, unused
261 * \param revents Currently unused
264 restart_on_signal(EV_P_ ev_signal
*w
, int revents
)
269 /** Print help and exit(2) with given exit_code.
270 * \param exit_code The exit code.
272 static void __attribute__ ((noreturn
))
273 exit_help(int exit_code
)
275 FILE *outfile
= (exit_code
== EXIT_SUCCESS
) ? stdout
: stderr
;
277 "Usage: awesome [OPTION]\n\
278 -h, --help show help\n\
279 -v, --version show version\n\
280 -c, --config FILE configuration file to use\n\
281 -k, --check check configuration file syntax\n");
285 /** Hello, this is main.
286 * \param argc Who knows.
287 * \param argv Who knows.
288 * \return EXIT_SUCCESS I hope.
291 main(int argc
, char **argv
)
293 char *confpath
= NULL
;
294 int xfd
, i
, screen_nbr
, opt
, colors_nbr
;
295 xcolor_init_request_t colors_reqs
[2];
298 xcb_generic_event_t
*event
;
299 static struct option long_options
[] =
301 { "help", 0, NULL
, 'h' },
302 { "version", 0, NULL
, 'v' },
303 { "config", 1, NULL
, 'c' },
304 { "check", 0, NULL
, 'k' },
308 /* event loop watchers */
309 ev_io xio
= { .fd
= -1 };
311 ev_prepare a_refresh
;
316 /* clear the globalconf structure */
317 p_clear(&globalconf
, 1);
318 globalconf
.keygrabber
= LUA_REFNIL
;
319 globalconf
.mousegrabber
= LUA_REFNIL
;
322 for(i
= 0; i
< argc
; i
++)
323 cmdlen
+= a_strlen(argv
[i
]) + 1;
325 globalconf
.argv
= p_new(char, cmdlen
);
326 a_strcpy(globalconf
.argv
, cmdlen
, argv
[0]);
328 for(i
= 1; i
< argc
; i
++)
330 a_strcat(globalconf
.argv
, cmdlen
, " ");
331 a_strcat(globalconf
.argv
, cmdlen
, argv
[i
]);
334 /* Text won't be printed correctly otherwise */
335 setlocale(LC_CTYPE
, "");
337 /* Get XDG basedir data */
344 while((opt
= getopt_long(argc
, argv
, "vhkc:",
345 long_options
, NULL
)) != -1)
352 exit_help(EXIT_SUCCESS
);
355 if(!luaA_parserc(&xdg
, confpath
, false))
357 fprintf(stderr
, "✘ Configuration file syntax error.\n");
362 fprintf(stderr
, "✔ Configuration file syntax OK.\n");
367 confpath
= a_strdup(optarg
);
369 fatal("-c option requires a file name");
373 globalconf
.loop
= ev_default_loop(0);
374 ev_timer_init(&globalconf
.timer
, &luaA_on_timer
, 0., 0.);
376 /* register function for signals */
377 ev_signal_init(&sigint
, exit_on_signal
, SIGINT
);
378 ev_signal_init(&sigterm
, exit_on_signal
, SIGTERM
);
379 ev_signal_init(&sighup
, restart_on_signal
, SIGHUP
);
380 ev_signal_start(globalconf
.loop
, &sigint
);
381 ev_signal_start(globalconf
.loop
, &sigterm
);
382 ev_signal_start(globalconf
.loop
, &sighup
);
383 ev_unref(globalconf
.loop
);
384 ev_unref(globalconf
.loop
);
385 ev_unref(globalconf
.loop
);
387 struct sigaction sa
= { .sa_handler
= signal_fatal
, .sa_flags
= 0 };
388 sigemptyset(&sa
.sa_mask
);
389 sigaction(SIGSEGV
, &sa
, 0);
392 globalconf
.connection
= xcb_connect(NULL
, &globalconf
.default_screen
);
393 if(xcb_connection_has_error(globalconf
.connection
))
394 fatal("cannot open display");
396 /* Prefetch all the extensions we might need */
397 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_big_requests_id
);
398 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_test_id
);
399 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_randr_id
);
400 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_xinerama_id
);
401 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_shape_id
);
403 /* initialize dbus */
406 /* Get the file descriptor corresponding to the X connection */
407 xfd
= xcb_get_file_descriptor(globalconf
.connection
);
408 ev_io_init(&xio
, &a_xcb_io_cb
, xfd
, EV_READ
);
409 ev_io_start(globalconf
.loop
, &xio
);
410 ev_check_init(&xcheck
, &a_xcb_check_cb
);
411 ev_check_start(globalconf
.loop
, &xcheck
);
412 ev_unref(globalconf
.loop
);
413 ev_prepare_init(&a_refresh
, &a_refresh_cb
);
414 ev_prepare_start(globalconf
.loop
, &a_refresh
);
415 ev_unref(globalconf
.loop
);
418 xcb_grab_server(globalconf
.connection
);
420 /* Make sure there are no pending events. Since we didn't really do anything
421 * at all yet, we will just discard all events which we received so far.
422 * The above GrabServer should make sure no new events are generated. */
423 xcb_aux_sync(globalconf
.connection
);
424 while ((event
= xcb_poll_for_event(globalconf
.connection
)) != NULL
)
426 /* Make sure errors are printed */
427 uint8_t response_type
= XCB_EVENT_RESPONSE_TYPE(event
);
428 if(response_type
== 0)
434 screen_nbr
< xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
437 const uint32_t select_input_val
= XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
;
439 /* This causes an error if some other window manager is running */
440 xcb_change_window_attributes(globalconf
.connection
,
441 xutil_screen_get(globalconf
.connection
, screen_nbr
)->root
,
442 XCB_CW_EVENT_MASK
, &select_input_val
);
445 /* Need to xcb_flush to validate error handler */
446 xcb_aux_sync(globalconf
.connection
);
448 /* Process all errors in the queue if any. There can be no events yet, so if
449 * this function returns something, it must be an error. */
450 if (xcb_poll_for_event(globalconf
.connection
) != NULL
)
451 fatal("another window manager is already running");
453 /* Prefetch the maximum request length */
454 xcb_prefetch_maximum_request_length(globalconf
.connection
);
456 /* check for xtest extension */
457 const xcb_query_extension_reply_t
*xtest_query
;
458 xtest_query
= xcb_get_extension_data(globalconf
.connection
, &xcb_test_id
);
459 globalconf
.have_xtest
= xtest_query
->present
;
461 /* Allocate the key symbols */
462 globalconf
.keysyms
= xcb_key_symbols_alloc(globalconf
.connection
);
463 xcb_get_modifier_mapping_cookie_t xmapping_cookie
=
464 xcb_get_modifier_mapping_unchecked(globalconf
.connection
);
466 /* init atom cache */
467 atoms_init(globalconf
.connection
);
469 /* init screens information */
472 /* init default font and colors */
473 colors_reqs
[0] = xcolor_init_unchecked(&globalconf
.colors
.fg
,
474 "black", sizeof("black") - 1);
476 colors_reqs
[1] = xcolor_init_unchecked(&globalconf
.colors
.bg
,
477 "white", sizeof("white") - 1);
479 globalconf
.font
= draw_font_new("sans 8");
481 for(colors_nbr
= 0; colors_nbr
< 2; colors_nbr
++)
482 xcolor_init_reply(colors_reqs
[colors_nbr
]);
484 xutil_lock_mask_get(globalconf
.connection
, xmapping_cookie
,
485 globalconf
.keysyms
, &globalconf
.numlockmask
,
486 &globalconf
.shiftlockmask
, &globalconf
.capslockmask
,
487 &globalconf
.modeswitchmask
);
489 /* do this only for real screen */
491 screen_nbr
< xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
494 /* select for events */
495 const uint32_t change_win_vals
[] =
497 XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
| XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY
498 | XCB_EVENT_MASK_ENTER_WINDOW
| XCB_EVENT_MASK_LEAVE_WINDOW
499 | XCB_EVENT_MASK_STRUCTURE_NOTIFY
500 | XCB_EVENT_MASK_PROPERTY_CHANGE
501 | XCB_EVENT_MASK_BUTTON_PRESS
502 | XCB_EVENT_MASK_BUTTON_RELEASE
503 | XCB_EVENT_MASK_FOCUS_CHANGE
506 xcb_change_window_attributes(globalconf
.connection
,
507 xutil_screen_get(globalconf
.connection
, screen_nbr
)->root
,
510 ewmh_init(screen_nbr
);
511 systray_init(screen_nbr
);
514 /* init spawn (sn) */
517 /* Parse and run configuration file */
518 if (!luaA_parserc(&xdg
, confpath
, true))
519 fatal("couldn't find any rc file");
525 /* scan existing windows */
528 /* we will receive events, stop grabbing server */
529 xcb_ungrab_server(globalconf
.connection
);
530 xcb_flush(globalconf
.connection
);
532 /* main event loop */
533 ev_loop(globalconf
.loop
, 0);
535 /* cleanup event loop */
536 ev_ref(globalconf
.loop
);
537 ev_check_stop(globalconf
.loop
, &xcheck
);
538 ev_ref(globalconf
.loop
);
539 ev_prepare_stop(globalconf
.loop
, &a_refresh
);
540 ev_ref(globalconf
.loop
);
541 ev_io_stop(globalconf
.loop
, &xio
);
543 awesome_atexit(false);
548 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80