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/xcb_event.h>
32 #include <xcb/xinerama.h>
33 #include <xcb/xtest.h>
37 #include "objects/client.h"
46 #include "common/version.h"
47 #include "common/atoms.h"
48 #include "common/xcursor.h"
49 #include "common/xutil.h"
50 #include "common/backtrace.h"
54 /** argv used to run awesome */
55 static char *awesome_argv
;
57 /** Call before exiting.
60 awesome_atexit(bool restart
)
62 lua_pushboolean(globalconf
.L
, restart
);
63 signal_object_emit(globalconf
.L
, &global_signals
, "exit", 1);
70 lua_close(globalconf
.L
);
72 xcb_flush(globalconf
.connection
);
74 /* Disconnect *after* closing lua */
75 xcb_disconnect(globalconf
.connection
);
80 /** Scan X to find windows to manage.
83 scan(xcb_query_tree_cookie_t tree_c
)
86 xcb_query_tree_reply_t
*tree_r
;
87 xcb_window_t
*wins
= NULL
;
88 xcb_get_window_attributes_reply_t
*attr_r
;
89 xcb_get_geometry_reply_t
*geom_r
;
92 tree_r
= xcb_query_tree_reply(globalconf
.connection
,
99 /* Get the tree of the children windows of the current root window */
100 if(!(wins
= xcb_query_tree_children(tree_r
)))
101 fatal("cannot get tree children");
103 tree_c_len
= xcb_query_tree_children_length(tree_r
);
104 xcb_get_window_attributes_cookie_t attr_wins
[tree_c_len
];
105 xcb_get_property_cookie_t state_wins
[tree_c_len
];
107 for(i
= 0; i
< tree_c_len
; i
++)
109 attr_wins
[i
] = xcb_get_window_attributes_unchecked(globalconf
.connection
,
112 state_wins
[i
] = xwindow_get_state_unchecked(wins
[i
]);
115 xcb_get_geometry_cookie_t
*geom_wins
[tree_c_len
];
117 for(i
= 0; i
< tree_c_len
; i
++)
119 attr_r
= xcb_get_window_attributes_reply(globalconf
.connection
,
123 state
= xwindow_get_state_reply(state_wins
[i
]);
125 if(!attr_r
|| attr_r
->override_redirect
126 || attr_r
->map_state
== XCB_MAP_STATE_UNMAPPED
127 || state
== XCB_ICCCM_WM_STATE_WITHDRAWN
)
136 /* Get the geometry of the current window */
137 geom_wins
[i
] = p_alloca(xcb_get_geometry_cookie_t
, 1);
138 *(geom_wins
[i
]) = xcb_get_geometry_unchecked(globalconf
.connection
, wins
[i
]);
141 for(i
= 0; i
< tree_c_len
; i
++)
143 if(!geom_wins
[i
] || !(geom_r
= xcb_get_geometry_reply(globalconf
.connection
,
144 *(geom_wins
[i
]), NULL
)))
147 client_manage(wins
[i
], geom_r
, true);
155 static xcb_visualtype_t
*
156 a_default_visual(xcb_screen_t
*s
)
158 xcb_depth_iterator_t depth_iter
= xcb_screen_allowed_depths_iterator(s
);
161 for(; depth_iter
.rem
; xcb_depth_next (&depth_iter
))
162 for(xcb_visualtype_iterator_t visual_iter
= xcb_depth_visuals_iterator(depth_iter
.data
);
163 visual_iter
.rem
; xcb_visualtype_next (&visual_iter
))
164 if(s
->root_visual
== visual_iter
.data
->visual_id
)
165 return visual_iter
.data
;
170 static xcb_visualtype_t
*
171 a_argb_visual(xcb_screen_t
*s
)
173 xcb_depth_iterator_t depth_iter
= xcb_screen_allowed_depths_iterator(s
);
176 for(; depth_iter
.rem
; xcb_depth_next (&depth_iter
))
177 if(depth_iter
.data
->depth
== 32)
178 for(xcb_visualtype_iterator_t visual_iter
= xcb_depth_visuals_iterator(depth_iter
.data
);
179 visual_iter
.rem
; xcb_visualtype_next (&visual_iter
))
180 return visual_iter
.data
;
186 a_visual_depth(xcb_screen_t
*s
, xcb_visualid_t vis
)
188 xcb_depth_iterator_t depth_iter
= xcb_screen_allowed_depths_iterator(s
);
191 for(; depth_iter
.rem
; xcb_depth_next (&depth_iter
))
192 for(xcb_visualtype_iterator_t visual_iter
= xcb_depth_visuals_iterator(depth_iter
.data
);
193 visual_iter
.rem
; xcb_visualtype_next (&visual_iter
))
194 if(vis
== visual_iter
.data
->visual_id
)
195 return depth_iter
.data
->depth
;
197 fatal("Could not find a visual's depth");
201 a_refresh_cb(EV_P_ ev_prepare
*w
, int revents
)
207 a_xcb_check_cb(EV_P_ ev_check
*w
, int revents
)
209 xcb_generic_event_t
*mouse
= NULL
, *event
;
211 while((event
= xcb_poll_for_event(globalconf
.connection
)))
213 /* We will treat mouse events later.
214 * We cannot afford to treat all mouse motion events,
215 * because that would be too much CPU intensive, so we just
216 * take the last we get after a bunch of events. */
217 if(XCB_EVENT_RESPONSE_TYPE(event
) == XCB_MOTION_NOTIFY
)
224 uint8_t type
= XCB_EVENT_RESPONSE_TYPE(event
);
225 if((type
== XCB_ENTER_NOTIFY
|| type
== XCB_LEAVE_NOTIFY
) && mouse
)
227 /* Make sure enter/motion/leave events are handled in the
246 a_xcb_io_cb(EV_P_ ev_io
*w
, int revents
)
248 /* a_xcb_check_cb() already handled all events */
250 if(xcb_connection_has_error(globalconf
.connection
))
251 fatal("X server connection broke");
255 signal_fatal(int signum
)
259 fatal("dumping backtrace\n%s", buf
.s
);
262 /** Function to exit on some signals.
263 * \param w the signal received, unused
264 * \param revents currently unused
267 exit_on_signal(EV_P_ ev_signal
*w
, int revents
)
273 awesome_restart(void)
275 awesome_atexit(true);
276 a_exec(awesome_argv
);
279 /** Function to restart awesome on some signals.
280 * \param w the signal received, unused
281 * \param revents Currently unused
284 restart_on_signal(EV_P_ ev_signal
*w
, int revents
)
289 /** Print help and exit(2) with given exit_code.
290 * \param exit_code The exit code.
292 static void __attribute__ ((noreturn
))
293 exit_help(int exit_code
)
295 FILE *outfile
= (exit_code
== EXIT_SUCCESS
) ? stdout
: stderr
;
297 "Usage: awesome [OPTION]\n\
298 -h, --help show help\n\
299 -v, --version show version\n\
300 -c, --config FILE configuration file to use\n\
301 -k, --check check configuration file syntax\n");
305 /** Hello, this is main.
306 * \param argc Who knows.
307 * \param argv Who knows.
308 * \return EXIT_SUCCESS I hope.
311 main(int argc
, char **argv
)
313 char *confpath
= NULL
;
317 bool no_argb
= false;
318 xcb_generic_event_t
*event
;
319 xcb_query_tree_cookie_t tree_c
;
320 static struct option long_options
[] =
322 { "help", 0, NULL
, 'h' },
323 { "version", 0, NULL
, 'v' },
324 { "config", 1, NULL
, 'c' },
325 { "check", 0, NULL
, 'k' },
326 { "no-argb", 0, NULL
, 'a' },
330 /* event loop watchers */
331 ev_io xio
= { .fd
= -1 };
333 ev_prepare a_refresh
;
338 /* clear the globalconf structure */
339 p_clear(&globalconf
, 1);
340 globalconf
.keygrabber
= LUA_REFNIL
;
341 globalconf
.mousegrabber
= LUA_REFNIL
;
344 for(i
= 0; i
< argc
; i
++)
345 cmdlen
+= a_strlen(argv
[i
]) + 1;
347 awesome_argv
= p_new(char, cmdlen
);
348 a_strcpy(awesome_argv
, cmdlen
, argv
[0]);
350 for(i
= 1; i
< argc
; i
++)
352 a_strcat(awesome_argv
, cmdlen
, " ");
353 a_strcat(awesome_argv
, cmdlen
, argv
[i
]);
356 /* Text won't be printed correctly otherwise */
357 setlocale(LC_CTYPE
, "");
359 /* Get XDG basedir data */
366 while((opt
= getopt_long(argc
, argv
, "vhkc:a",
367 long_options
, NULL
)) != -1)
374 exit_help(EXIT_SUCCESS
);
377 if(!luaA_parserc(&xdg
, confpath
, false))
379 fprintf(stderr
, "✘ Configuration file syntax error.\n");
384 fprintf(stderr
, "✔ Configuration file syntax OK.\n");
389 confpath
= a_strdup(optarg
);
391 fatal("-c option requires a file name");
398 globalconf
.loop
= ev_default_loop(EVFLAG_NOSIGFD
);
400 /* register function for signals */
401 ev_signal_init(&sigint
, exit_on_signal
, SIGINT
);
402 ev_signal_init(&sigterm
, exit_on_signal
, SIGTERM
);
403 ev_signal_init(&sighup
, restart_on_signal
, SIGHUP
);
404 ev_signal_start(globalconf
.loop
, &sigint
);
405 ev_signal_start(globalconf
.loop
, &sigterm
);
406 ev_signal_start(globalconf
.loop
, &sighup
);
407 ev_unref(globalconf
.loop
);
408 ev_unref(globalconf
.loop
);
409 ev_unref(globalconf
.loop
);
411 struct sigaction sa
= { .sa_handler
= signal_fatal
, .sa_flags
= 0 };
412 sigemptyset(&sa
.sa_mask
);
413 sigaction(SIGSEGV
, &sa
, 0);
416 globalconf
.connection
= xcb_connect(NULL
, &globalconf
.default_screen
);
417 if(xcb_connection_has_error(globalconf
.connection
))
418 fatal("cannot open display");
420 globalconf
.screen
= xcb_aux_get_screen(globalconf
.connection
, globalconf
.default_screen
);
421 /* FIXME The following two assignments were swapped on purpose */
423 globalconf
.visual
= a_default_visual(globalconf
.screen
);
424 if(!globalconf
.visual
)
425 globalconf
.visual
= a_argb_visual(globalconf
.screen
);
426 globalconf
.default_depth
= a_visual_depth(globalconf
.screen
, globalconf
.visual
->visual_id
);
427 globalconf
.default_cmap
= globalconf
.screen
->default_colormap
;
428 if(globalconf
.default_depth
!= globalconf
.screen
->root_depth
)
430 // We need our own color map if we aren't using the default depth
431 globalconf
.default_cmap
= xcb_generate_id(globalconf
.connection
);
432 xcb_create_colormap(globalconf
.connection
, XCB_COLORMAP_ALLOC_NONE
,
433 globalconf
.default_cmap
, globalconf
.screen
->root
,
434 globalconf
.visual
->visual_id
);
437 /* Prefetch all the extensions we might need */
438 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_big_requests_id
);
439 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_test_id
);
440 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_randr_id
);
441 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_xinerama_id
);
443 /* initialize dbus */
446 /* Get the file descriptor corresponding to the X connection */
447 xfd
= xcb_get_file_descriptor(globalconf
.connection
);
448 ev_io_init(&xio
, &a_xcb_io_cb
, xfd
, EV_READ
);
449 ev_io_start(globalconf
.loop
, &xio
);
450 ev_check_init(&xcheck
, &a_xcb_check_cb
);
451 ev_check_start(globalconf
.loop
, &xcheck
);
452 ev_unref(globalconf
.loop
);
453 ev_prepare_init(&a_refresh
, &a_refresh_cb
);
454 ev_prepare_start(globalconf
.loop
, &a_refresh
);
455 ev_unref(globalconf
.loop
);
458 xcb_grab_server(globalconf
.connection
);
460 /* Make sure there are no pending events. Since we didn't really do anything
461 * at all yet, we will just discard all events which we received so far.
462 * The above GrabServer should make sure no new events are generated. */
463 xcb_aux_sync(globalconf
.connection
);
464 while ((event
= xcb_poll_for_event(globalconf
.connection
)) != NULL
)
466 /* Make sure errors are printed */
467 uint8_t response_type
= XCB_EVENT_RESPONSE_TYPE(event
);
468 if(response_type
== 0)
474 const uint32_t select_input_val
= XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
;
476 /* This causes an error if some other window manager is running */
477 xcb_change_window_attributes(globalconf
.connection
,
478 globalconf
.screen
->root
,
479 XCB_CW_EVENT_MASK
, &select_input_val
);
482 /* Need to xcb_flush to validate error handler */
483 xcb_aux_sync(globalconf
.connection
);
485 /* Process all errors in the queue if any. There can be no events yet, so if
486 * this function returns something, it must be an error. */
487 if (xcb_poll_for_event(globalconf
.connection
) != NULL
)
488 fatal("another window manager is already running");
490 /* Prefetch the maximum request length */
491 xcb_prefetch_maximum_request_length(globalconf
.connection
);
493 /* check for xtest extension */
494 const xcb_query_extension_reply_t
*xtest_query
;
495 xtest_query
= xcb_get_extension_data(globalconf
.connection
, &xcb_test_id
);
496 globalconf
.have_xtest
= xtest_query
->present
;
498 /* Allocate the key symbols */
499 globalconf
.keysyms
= xcb_key_symbols_alloc(globalconf
.connection
);
500 xcb_get_modifier_mapping_cookie_t xmapping_cookie
=
501 xcb_get_modifier_mapping_unchecked(globalconf
.connection
);
503 /* init atom cache */
504 atoms_init(globalconf
.connection
);
506 /* init screens information */
509 xutil_lock_mask_get(globalconf
.connection
, xmapping_cookie
,
510 globalconf
.keysyms
, &globalconf
.numlockmask
,
511 &globalconf
.shiftlockmask
, &globalconf
.capslockmask
,
512 &globalconf
.modeswitchmask
);
514 /* do this only for real screen */
518 /* init spawn (sn) */
521 /* The default GC is just a newly created associated with a window with
522 * depth globalconf.default_depth */
523 xcb_window_t tmp_win
= xcb_generate_id(globalconf
.connection
);
524 globalconf
.gc
= xcb_generate_id(globalconf
.connection
);
525 xcb_create_window(globalconf
.connection
, globalconf
.default_depth
,
526 tmp_win
, globalconf
.screen
->root
,
528 XCB_COPY_FROM_PARENT
, globalconf
.visual
->visual_id
,
529 XCB_CW_BACK_PIXEL
| XCB_CW_BORDER_PIXEL
| XCB_CW_COLORMAP
,
532 globalconf
.screen
->black_pixel
,
533 globalconf
.screen
->black_pixel
,
534 globalconf
.default_cmap
536 xcb_create_gc(globalconf
.connection
, globalconf
.gc
, tmp_win
, XCB_GC_FOREGROUND
| XCB_GC_BACKGROUND
,
537 (const uint32_t[]) { globalconf
.screen
->black_pixel
, globalconf
.screen
->white_pixel
});
538 xcb_destroy_window(globalconf
.connection
, tmp_win
);
540 /* Get the window tree associated to this screen */
541 tree_c
= xcb_query_tree_unchecked(globalconf
.connection
,
542 globalconf
.screen
->root
);
544 xcb_change_window_attributes(globalconf
.connection
,
545 globalconf
.screen
->root
,
547 ROOT_WINDOW_EVENT_MASK
);
549 /* we will receive events, stop grabbing server */
550 xcb_ungrab_server(globalconf
.connection
);
552 /* Parse and run configuration file */
553 if (!luaA_parserc(&xdg
, confpath
, true))
554 fatal("couldn't find any rc file");
560 /* scan existing windows */
563 xcb_flush(globalconf
.connection
);
565 /* main event loop */
566 ev_loop(globalconf
.loop
, 0);
568 /* cleanup event loop */
569 ev_ref(globalconf
.loop
);
570 ev_check_stop(globalconf
.loop
, &xcheck
);
571 ev_ref(globalconf
.loop
);
572 ev_prepare_stop(globalconf
.loop
, &a_refresh
);
573 ev_ref(globalconf
.loop
);
574 ev_io_stop(globalconf
.loop
, &xio
);
576 awesome_atexit(false);
581 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80