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>
34 #include <xcb/shape.h>
36 #include <X11/Xlib-xcb.h>
40 #include "objects/client.h"
49 #include "common/version.h"
50 #include "common/atoms.h"
51 #include "common/xcursor.h"
52 #include "common/xutil.h"
53 #include "common/backtrace.h"
57 /** argv used to run awesome */
58 static char *awesome_argv
;
60 /** Call before exiting.
63 awesome_atexit(bool restart
)
65 lua_pushboolean(globalconf
.L
, restart
);
66 signal_object_emit(globalconf
.L
, &global_signals
, "exit", 1);
73 lua_close(globalconf
.L
);
75 xcb_flush(globalconf
.connection
);
77 /* Disconnect *after* closing lua */
78 xcb_disconnect(globalconf
.connection
);
83 /** Scan X to find windows to manage.
86 scan(xcb_query_tree_cookie_t tree_c
)
89 xcb_query_tree_reply_t
*tree_r
;
90 xcb_window_t
*wins
= NULL
;
91 xcb_get_window_attributes_reply_t
*attr_r
;
92 xcb_get_geometry_reply_t
*geom_r
;
95 tree_r
= xcb_query_tree_reply(globalconf
.connection
,
102 /* Get the tree of the children windows of the current root window */
103 if(!(wins
= xcb_query_tree_children(tree_r
)))
104 fatal("cannot get tree children");
106 tree_c_len
= xcb_query_tree_children_length(tree_r
);
107 xcb_get_window_attributes_cookie_t attr_wins
[tree_c_len
];
108 xcb_get_property_cookie_t state_wins
[tree_c_len
];
110 for(i
= 0; i
< tree_c_len
; i
++)
112 attr_wins
[i
] = xcb_get_window_attributes_unchecked(globalconf
.connection
,
115 state_wins
[i
] = xwindow_get_state_unchecked(wins
[i
]);
118 xcb_get_geometry_cookie_t
*geom_wins
[tree_c_len
];
120 for(i
= 0; i
< tree_c_len
; i
++)
122 attr_r
= xcb_get_window_attributes_reply(globalconf
.connection
,
126 state
= xwindow_get_state_reply(state_wins
[i
]);
128 if(!attr_r
|| attr_r
->override_redirect
129 || attr_r
->map_state
== XCB_MAP_STATE_UNMAPPED
130 || state
== XCB_ICCCM_WM_STATE_WITHDRAWN
)
139 /* Get the geometry of the current window */
140 geom_wins
[i
] = p_alloca(xcb_get_geometry_cookie_t
, 1);
141 *(geom_wins
[i
]) = xcb_get_geometry_unchecked(globalconf
.connection
, wins
[i
]);
144 for(i
= 0; i
< tree_c_len
; i
++)
146 if(!geom_wins
[i
] || !(geom_r
= xcb_get_geometry_reply(globalconf
.connection
,
147 *(geom_wins
[i
]), NULL
)))
150 client_manage(wins
[i
], geom_r
, true);
159 a_refresh_cb(EV_P_ ev_prepare
*w
, int revents
)
165 a_xcb_check_cb(EV_P_ ev_check
*w
, int revents
)
167 xcb_generic_event_t
*mouse
= NULL
, *event
;
169 while((event
= xcb_poll_for_event(globalconf
.connection
)))
171 /* We will treat mouse events later.
172 * We cannot afford to treat all mouse motion events,
173 * because that would be too much CPU intensive, so we just
174 * take the last we get after a bunch of events. */
175 if(XCB_EVENT_RESPONSE_TYPE(event
) == XCB_MOTION_NOTIFY
)
182 uint8_t type
= XCB_EVENT_RESPONSE_TYPE(event
);
183 if((type
== XCB_ENTER_NOTIFY
|| type
== XCB_LEAVE_NOTIFY
) && mouse
)
185 /* Make sure enter/motion/leave events are handled in the
204 a_xcb_io_cb(EV_P_ ev_io
*w
, int revents
)
206 /* a_xcb_check_cb() already handled all events */
208 if(xcb_connection_has_error(globalconf
.connection
))
209 fatal("X server connection broke");
213 signal_fatal(int signum
)
217 fatal("signal %d, dumping backtrace\n%s", signum
, buf
.s
);
220 /** Function to exit on some signals.
221 * \param w the signal received, unused
222 * \param revents currently unused
225 exit_on_signal(EV_P_ ev_signal
*w
, int revents
)
231 awesome_restart(void)
233 awesome_atexit(true);
234 a_exec(awesome_argv
);
237 /** Function to restart awesome on some signals.
238 * \param w the signal received, unused
239 * \param revents Currently unused
242 restart_on_signal(EV_P_ ev_signal
*w
, int revents
)
247 /** Print help and exit(2) with given exit_code.
248 * \param exit_code The exit code.
250 static void __attribute__ ((noreturn
))
251 exit_help(int exit_code
)
253 FILE *outfile
= (exit_code
== EXIT_SUCCESS
) ? stdout
: stderr
;
255 "Usage: awesome [OPTION]\n\
256 -h, --help show help\n\
257 -v, --version show version\n\
258 -c, --config FILE configuration file to use\n\
259 -k, --check check configuration file syntax\n");
263 /** Hello, this is main.
264 * \param argc Who knows.
265 * \param argv Who knows.
266 * \return EXIT_SUCCESS I hope.
269 main(int argc
, char **argv
)
271 char *confpath
= NULL
;
275 bool no_argb
= false;
276 xcb_generic_event_t
*event
;
277 xcb_query_tree_cookie_t tree_c
;
278 static struct option long_options
[] =
280 { "help", 0, NULL
, 'h' },
281 { "version", 0, NULL
, 'v' },
282 { "config", 1, NULL
, 'c' },
283 { "check", 0, NULL
, 'k' },
284 { "no-argb", 0, NULL
, 'a' },
288 /* event loop watchers */
289 ev_io xio
= { .fd
= -1 };
291 ev_prepare a_refresh
;
296 /* clear the globalconf structure */
297 p_clear(&globalconf
, 1);
298 globalconf
.keygrabber
= LUA_REFNIL
;
299 globalconf
.mousegrabber
= LUA_REFNIL
;
300 buffer_init(&globalconf
.startup_errors
);
303 for(i
= 0; i
< argc
; i
++)
304 cmdlen
+= a_strlen(argv
[i
]) + 1;
306 awesome_argv
= p_new(char, cmdlen
);
307 a_strcpy(awesome_argv
, cmdlen
, argv
[0]);
309 for(i
= 1; i
< argc
; i
++)
311 a_strcat(awesome_argv
, cmdlen
, " ");
312 a_strcat(awesome_argv
, cmdlen
, argv
[i
]);
315 /* Text won't be printed correctly otherwise */
316 setlocale(LC_CTYPE
, "");
318 /* Get XDG basedir data */
325 while((opt
= getopt_long(argc
, argv
, "vhkc:a",
326 long_options
, NULL
)) != -1)
333 exit_help(EXIT_SUCCESS
);
336 if(!luaA_parserc(&xdg
, confpath
, false))
338 fprintf(stderr
, "✘ Configuration file syntax error.\n");
343 fprintf(stderr
, "✔ Configuration file syntax OK.\n");
348 confpath
= a_strdup(optarg
);
350 fatal("-c option requires a file name");
357 globalconf
.loop
= ev_default_loop(EVFLAG_NOSIGFD
);
359 /* register function for signals */
360 ev_signal_init(&sigint
, exit_on_signal
, SIGINT
);
361 ev_signal_init(&sigterm
, exit_on_signal
, SIGTERM
);
362 ev_signal_init(&sighup
, restart_on_signal
, SIGHUP
);
363 ev_signal_start(globalconf
.loop
, &sigint
);
364 ev_signal_start(globalconf
.loop
, &sigterm
);
365 ev_signal_start(globalconf
.loop
, &sighup
);
366 ev_unref(globalconf
.loop
);
367 ev_unref(globalconf
.loop
);
368 ev_unref(globalconf
.loop
);
370 struct sigaction sa
= { .sa_handler
= signal_fatal
, .sa_flags
= 0 };
371 sigemptyset(&sa
.sa_mask
);
372 sigaction(SIGSEGV
, &sa
, 0);
375 globalconf
.display
= XOpenDisplay(NULL
);
376 if (globalconf
.display
== NULL
) {
377 fatal("cannot open display");
379 XSetEventQueueOwner(globalconf
.display
, XCBOwnsEventQueue
);
380 globalconf
.default_screen
= XDefaultScreen(globalconf
.display
);
381 globalconf
.connection
= XGetXCBConnection(globalconf
.display
);
383 /* Double checking that connection is good and operatable with xcb */
384 if(xcb_connection_has_error(globalconf
.connection
))
385 fatal("cannot open display");
387 globalconf
.screen
= xcb_aux_get_screen(globalconf
.connection
, globalconf
.default_screen
);
388 globalconf
.default_visual
= draw_default_visual(globalconf
.screen
);
390 globalconf
.visual
= draw_argb_visual(globalconf
.screen
);
391 if(!globalconf
.visual
)
392 globalconf
.visual
= globalconf
.default_visual
;
393 globalconf
.default_depth
= draw_visual_depth(globalconf
.screen
, globalconf
.visual
->visual_id
);
394 globalconf
.default_cmap
= globalconf
.screen
->default_colormap
;
395 if(globalconf
.default_depth
!= globalconf
.screen
->root_depth
)
397 // We need our own color map if we aren't using the default depth
398 globalconf
.default_cmap
= xcb_generate_id(globalconf
.connection
);
399 xcb_create_colormap(globalconf
.connection
, XCB_COLORMAP_ALLOC_NONE
,
400 globalconf
.default_cmap
, globalconf
.screen
->root
,
401 globalconf
.visual
->visual_id
);
404 /* Prefetch all the extensions we might need */
405 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_big_requests_id
);
406 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_test_id
);
407 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_randr_id
);
408 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_xinerama_id
);
409 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_shape_id
);
411 /* initialize dbus */
414 /* Get the file descriptor corresponding to the X connection */
415 xfd
= xcb_get_file_descriptor(globalconf
.connection
);
416 ev_io_init(&xio
, &a_xcb_io_cb
, xfd
, EV_READ
);
417 ev_io_start(globalconf
.loop
, &xio
);
418 ev_check_init(&xcheck
, &a_xcb_check_cb
);
419 ev_check_start(globalconf
.loop
, &xcheck
);
420 ev_unref(globalconf
.loop
);
421 ev_prepare_init(&a_refresh
, &a_refresh_cb
);
422 ev_prepare_start(globalconf
.loop
, &a_refresh
);
423 ev_unref(globalconf
.loop
);
426 xcb_grab_server(globalconf
.connection
);
428 /* Make sure there are no pending events. Since we didn't really do anything
429 * at all yet, we will just discard all events which we received so far.
430 * The above GrabServer should make sure no new events are generated. */
431 xcb_aux_sync(globalconf
.connection
);
432 while ((event
= xcb_poll_for_event(globalconf
.connection
)) != NULL
)
434 /* Make sure errors are printed */
435 uint8_t response_type
= XCB_EVENT_RESPONSE_TYPE(event
);
436 if(response_type
== 0)
442 const uint32_t select_input_val
= XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
;
444 /* This causes an error if some other window manager is running */
445 xcb_change_window_attributes(globalconf
.connection
,
446 globalconf
.screen
->root
,
447 XCB_CW_EVENT_MASK
, &select_input_val
);
450 /* Need to xcb_flush to validate error handler */
451 xcb_aux_sync(globalconf
.connection
);
453 /* Process all errors in the queue if any. There can be no events yet, so if
454 * this function returns something, it must be an error. */
455 if (xcb_poll_for_event(globalconf
.connection
) != NULL
)
456 fatal("another window manager is already running");
458 /* Prefetch the maximum request length */
459 xcb_prefetch_maximum_request_length(globalconf
.connection
);
461 /* check for xtest extension */
462 const xcb_query_extension_reply_t
*xtest_query
;
463 xtest_query
= xcb_get_extension_data(globalconf
.connection
, &xcb_test_id
);
464 globalconf
.have_xtest
= xtest_query
->present
;
466 /* Allocate the key symbols */
467 globalconf
.keysyms
= xcb_key_symbols_alloc(globalconf
.connection
);
468 xcb_get_modifier_mapping_cookie_t xmapping_cookie
=
469 xcb_get_modifier_mapping_unchecked(globalconf
.connection
);
471 /* init atom cache */
472 atoms_init(globalconf
.connection
);
474 /* init screens information */
477 xutil_lock_mask_get(globalconf
.connection
, xmapping_cookie
,
478 globalconf
.keysyms
, &globalconf
.numlockmask
,
479 &globalconf
.shiftlockmask
, &globalconf
.capslockmask
,
480 &globalconf
.modeswitchmask
);
482 /* do this only for real screen */
486 /* init spawn (sn) */
489 /* The default GC is just a newly created associated with a window with
490 * depth globalconf.default_depth */
491 xcb_window_t tmp_win
= xcb_generate_id(globalconf
.connection
);
492 globalconf
.gc
= xcb_generate_id(globalconf
.connection
);
493 xcb_create_window(globalconf
.connection
, globalconf
.default_depth
,
494 tmp_win
, globalconf
.screen
->root
,
496 XCB_COPY_FROM_PARENT
, globalconf
.visual
->visual_id
,
497 XCB_CW_BACK_PIXEL
| XCB_CW_BORDER_PIXEL
| XCB_CW_COLORMAP
,
500 globalconf
.screen
->black_pixel
,
501 globalconf
.screen
->black_pixel
,
502 globalconf
.default_cmap
504 xcb_create_gc(globalconf
.connection
, globalconf
.gc
, tmp_win
, XCB_GC_FOREGROUND
| XCB_GC_BACKGROUND
,
505 (const uint32_t[]) { globalconf
.screen
->black_pixel
, globalconf
.screen
->white_pixel
});
506 xcb_destroy_window(globalconf
.connection
, tmp_win
);
508 /* Get the window tree associated to this screen */
509 tree_c
= xcb_query_tree_unchecked(globalconf
.connection
,
510 globalconf
.screen
->root
);
512 xcb_change_window_attributes(globalconf
.connection
,
513 globalconf
.screen
->root
,
515 ROOT_WINDOW_EVENT_MASK
);
517 /* we will receive events, stop grabbing server */
518 xcb_ungrab_server(globalconf
.connection
);
520 /* Parse and run configuration file */
521 if (!luaA_parserc(&xdg
, confpath
, true))
522 fatal("couldn't find any rc file");
528 /* scan existing windows */
531 xcb_flush(globalconf
.connection
);
533 /* main event loop */
534 ev_loop(globalconf
.loop
, 0);
536 /* cleanup event loop */
537 ev_ref(globalconf
.loop
);
538 ev_check_stop(globalconf
.loop
, &xcheck
);
539 ev_ref(globalconf
.loop
);
540 ev_prepare_stop(globalconf
.loop
, &a_refresh
);
541 ev_ref(globalconf
.loop
);
542 ev_io_stop(globalconf
.loop
, &xio
);
544 awesome_atexit(false);
549 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80