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.
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 signal_object_emit(globalconf
.L
, &global_signals
, "exit", 0);
76 /* do this only for real screen */
77 const xcb_setup_t
*setup
= xcb_get_setup(globalconf
.connection
);
78 nscreens
= setup
? xcb_setup_roots_length(setup
) : -1;
80 screen_nbr
< nscreens
;
82 systray_cleanup(screen_nbr
);
85 lua_close(globalconf
.L
);
87 xcb_flush(globalconf
.connection
);
89 /* Disconnect *after* closing lua */
90 xcb_disconnect(globalconf
.connection
);
95 /** Scan X to find windows to manage.
100 int i
, phys_screen
, tree_c_len
;
101 const int screen_max
= xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
102 root_win_t root_wins
[screen_max
];
103 xcb_query_tree_reply_t
*tree_r
;
104 xcb_window_t
*wins
= NULL
;
105 xcb_get_window_attributes_reply_t
*attr_r
;
106 xcb_get_geometry_reply_t
*geom_r
;
109 for(phys_screen
= 0; phys_screen
< screen_max
; phys_screen
++)
111 /* Get the root window ID associated to this screen */
112 root_wins
[phys_screen
].id
= xutil_screen_get(globalconf
.connection
, phys_screen
)->root
;
114 /* Get the window tree associated to this screen */
115 root_wins
[phys_screen
].tree_cookie
= xcb_query_tree_unchecked(globalconf
.connection
,
116 root_wins
[phys_screen
].id
);
119 for(phys_screen
= 0; phys_screen
< screen_max
; phys_screen
++)
121 tree_r
= xcb_query_tree_reply(globalconf
.connection
,
122 root_wins
[phys_screen
].tree_cookie
,
128 /* Get the tree of the children windows of the current root window */
129 if(!(wins
= xcb_query_tree_children(tree_r
)))
130 fatal("cannot get tree children");
132 tree_c_len
= xcb_query_tree_children_length(tree_r
);
133 xcb_get_window_attributes_cookie_t attr_wins
[tree_c_len
];
134 xcb_get_property_cookie_t state_wins
[tree_c_len
];
136 for(i
= 0; i
< tree_c_len
; i
++)
138 attr_wins
[i
] = xcb_get_window_attributes_unchecked(globalconf
.connection
,
141 state_wins
[i
] = window_state_get_unchecked(wins
[i
]);
144 xcb_get_geometry_cookie_t
*geom_wins
[tree_c_len
];
146 for(i
= 0; i
< tree_c_len
; i
++)
148 attr_r
= xcb_get_window_attributes_reply(globalconf
.connection
,
152 state
= window_state_get_reply(state_wins
[i
]);
154 if(!attr_r
|| attr_r
->override_redirect
155 || attr_r
->map_state
== XCB_MAP_STATE_UNMAPPED
156 || state
== XCB_WM_STATE_WITHDRAWN
)
165 /* Get the geometry of the current window */
166 geom_wins
[i
] = p_alloca(xcb_get_geometry_cookie_t
, 1);
167 *(geom_wins
[i
]) = xcb_get_geometry_unchecked(globalconf
.connection
, wins
[i
]);
170 for(i
= 0; i
< tree_c_len
; i
++)
172 if(!geom_wins
[i
] || !(geom_r
= xcb_get_geometry_reply(globalconf
.connection
,
173 *(geom_wins
[i
]), NULL
)))
176 /* The window can be mapped, so force it to be undrawn for startup */
177 xcb_unmap_window(globalconf
.connection
, wins
[i
]);
179 client_manage(wins
[i
], geom_r
, phys_screen
, true);
189 a_refresh_cb(EV_P_ ev_prepare
*w
, int revents
)
195 a_xcb_check_cb(EV_P_ ev_check
*w
, int revents
)
197 xcb_generic_event_t
*mouse
= NULL
, *event
;
199 while((event
= xcb_poll_for_event(globalconf
.connection
)))
201 /* We will treat mouse events later.
202 * We cannot afford to treat all mouse motion events,
203 * because that would be too much CPU intensive, so we just
204 * take the last we get after a bunch of events. */
205 if(XCB_EVENT_RESPONSE_TYPE(event
) == XCB_MOTION_NOTIFY
)
225 a_xcb_io_cb(EV_P_ ev_io
*w
, int revents
)
227 /* a_xcb_check_cb() already handled all events */
229 if(xcb_connection_has_error(globalconf
.connection
))
230 fatal("X server connection broke");
234 signal_fatal(int signum
)
238 fatal("dumping backtrace\n%s", buf
.s
);
241 /** Function to exit on some signals.
242 * \param w the signal received, unused
243 * \param revents currently unused
246 exit_on_signal(EV_P_ ev_signal
*w
, int revents
)
252 awesome_restart(void)
255 a_exec(globalconf
.argv
);
258 /** Function to restart awesome on some signals.
259 * \param w the signal received, unused
260 * \param revents Currently unused
263 restart_on_signal(EV_P_ ev_signal
*w
, int revents
)
268 /** Print help and exit(2) with given exit_code.
269 * \param exit_code The exit code.
271 static void __attribute__ ((noreturn
))
272 exit_help(int exit_code
)
274 FILE *outfile
= (exit_code
== EXIT_SUCCESS
) ? stdout
: stderr
;
276 "Usage: awesome [OPTION]\n\
277 -h, --help show help\n\
278 -v, --version show version\n\
279 -c, --config FILE configuration file to use\n\
280 -k, --check check configuration file syntax\n");
284 /** Hello, this is main.
285 * \param argc Who knows.
286 * \param argv Who knows.
287 * \return EXIT_SUCCESS I hope.
290 main(int argc
, char **argv
)
292 char *confpath
= NULL
;
293 int xfd
, i
, screen_nbr
, opt
, colors_nbr
;
294 xcolor_init_request_t colors_reqs
[2];
297 static struct option long_options
[] =
299 { "help", 0, NULL
, 'h' },
300 { "version", 0, NULL
, 'v' },
301 { "config", 1, NULL
, 'c' },
302 { "check", 0, NULL
, 'k' },
306 /* event loop watchers */
307 ev_io xio
= { .fd
= -1 };
309 ev_prepare a_refresh
;
314 /* clear the globalconf structure */
315 p_clear(&globalconf
, 1);
316 globalconf
.keygrabber
= LUA_REFNIL
;
317 globalconf
.mousegrabber
= LUA_REFNIL
;
320 for(i
= 0; i
< argc
; i
++)
321 cmdlen
+= a_strlen(argv
[i
]) + 1;
323 globalconf
.argv
= p_new(char, cmdlen
);
324 a_strcpy(globalconf
.argv
, cmdlen
, argv
[0]);
326 for(i
= 1; i
< argc
; i
++)
328 a_strcat(globalconf
.argv
, cmdlen
, " ");
329 a_strcat(globalconf
.argv
, cmdlen
, argv
[i
]);
332 /* Text won't be printed correctly otherwise */
333 setlocale(LC_CTYPE
, "");
335 /* Get XDG basedir data */
342 while((opt
= getopt_long(argc
, argv
, "vhkc:",
343 long_options
, NULL
)) != -1)
350 exit_help(EXIT_SUCCESS
);
353 if(!luaA_parserc(&xdg
, confpath
, false))
355 fprintf(stderr
, "✘ Configuration file syntax error.\n");
360 fprintf(stderr
, "✔ Configuration file syntax OK.\n");
365 confpath
= a_strdup(optarg
);
367 fatal("-c option requires a file name");
371 globalconf
.loop
= ev_default_loop(0);
372 ev_timer_init(&globalconf
.timer
, &luaA_on_timer
, 0., 0.);
374 /* register function for signals */
375 ev_signal_init(&sigint
, exit_on_signal
, SIGINT
);
376 ev_signal_init(&sigterm
, exit_on_signal
, SIGTERM
);
377 ev_signal_init(&sighup
, restart_on_signal
, SIGHUP
);
378 ev_signal_start(globalconf
.loop
, &sigint
);
379 ev_signal_start(globalconf
.loop
, &sigterm
);
380 ev_signal_start(globalconf
.loop
, &sighup
);
381 ev_unref(globalconf
.loop
);
382 ev_unref(globalconf
.loop
);
383 ev_unref(globalconf
.loop
);
385 struct sigaction sa
= { .sa_handler
= signal_fatal
, .sa_flags
= 0 };
386 sigemptyset(&sa
.sa_mask
);
387 sigaction(SIGSEGV
, &sa
, 0);
390 globalconf
.connection
= xcb_connect(NULL
, &globalconf
.default_screen
);
391 if(xcb_connection_has_error(globalconf
.connection
))
392 fatal("cannot open display");
394 /* Prefetch all the extensions we might need */
395 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_big_requests_id
);
396 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_test_id
);
397 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_randr_id
);
398 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_xinerama_id
);
399 xcb_prefetch_extension_data(globalconf
.connection
, &xcb_shape_id
);
401 /* initialize dbus */
405 xcb_grab_server(globalconf
.connection
);
406 xcb_flush(globalconf
.connection
);
408 /* Get the file descriptor corresponding to the X connection */
409 xfd
= xcb_get_file_descriptor(globalconf
.connection
);
410 ev_io_init(&xio
, &a_xcb_io_cb
, xfd
, EV_READ
);
411 ev_io_start(globalconf
.loop
, &xio
);
412 ev_check_init(&xcheck
, &a_xcb_check_cb
);
413 ev_check_start(globalconf
.loop
, &xcheck
);
414 ev_unref(globalconf
.loop
);
415 ev_prepare_init(&a_refresh
, &a_refresh_cb
);
416 ev_prepare_start(globalconf
.loop
, &a_refresh
);
417 ev_unref(globalconf
.loop
);
420 screen_nbr
< xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
423 const uint32_t select_input_val
= XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
;
425 /* This causes an error if some other window manager is running */
426 xcb_change_window_attributes(globalconf
.connection
,
427 xutil_screen_get(globalconf
.connection
, screen_nbr
)->root
,
428 XCB_CW_EVENT_MASK
, &select_input_val
);
431 /* Need to xcb_flush to validate error handler */
432 xcb_aux_sync(globalconf
.connection
);
434 /* Process all errors in the queue if any. There can be no events yet, so if
435 * this function returns something, it must be an error. */
436 if (xcb_poll_for_event(globalconf
.connection
) != NULL
)
437 fatal("another window manager is already running");
439 /* Prefetch the maximum request length */
440 xcb_prefetch_maximum_request_length(globalconf
.connection
);
442 /* check for xtest extension */
443 const xcb_query_extension_reply_t
*xtest_query
;
444 xtest_query
= xcb_get_extension_data(globalconf
.connection
, &xcb_test_id
);
445 globalconf
.have_xtest
= xtest_query
->present
;
447 /* Allocate the key symbols */
448 globalconf
.keysyms
= xcb_key_symbols_alloc(globalconf
.connection
);
449 xcb_get_modifier_mapping_cookie_t xmapping_cookie
=
450 xcb_get_modifier_mapping_unchecked(globalconf
.connection
);
452 /* init atom cache */
453 atoms_init(globalconf
.connection
);
455 /* init screens information */
458 /* init default font and colors */
459 colors_reqs
[0] = xcolor_init_unchecked(&globalconf
.colors
.fg
,
460 "black", sizeof("black") - 1);
462 colors_reqs
[1] = xcolor_init_unchecked(&globalconf
.colors
.bg
,
463 "white", sizeof("white") - 1);
465 globalconf
.font
= draw_font_new("sans 8");
467 for(colors_nbr
= 0; colors_nbr
< 2; colors_nbr
++)
468 xcolor_init_reply(colors_reqs
[colors_nbr
]);
470 xutil_lock_mask_get(globalconf
.connection
, xmapping_cookie
,
471 globalconf
.keysyms
, &globalconf
.numlockmask
,
472 &globalconf
.shiftlockmask
, &globalconf
.capslockmask
,
473 &globalconf
.modeswitchmask
);
475 /* do this only for real screen */
477 screen_nbr
< xcb_setup_roots_length(xcb_get_setup(globalconf
.connection
));
480 /* select for events */
481 const uint32_t change_win_vals
[] =
483 XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
| XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY
484 | XCB_EVENT_MASK_ENTER_WINDOW
| XCB_EVENT_MASK_LEAVE_WINDOW
485 | XCB_EVENT_MASK_STRUCTURE_NOTIFY
486 | XCB_EVENT_MASK_PROPERTY_CHANGE
487 | XCB_EVENT_MASK_BUTTON_PRESS
488 | XCB_EVENT_MASK_BUTTON_RELEASE
489 | XCB_EVENT_MASK_FOCUS_CHANGE
492 xcb_change_window_attributes(globalconf
.connection
,
493 xutil_screen_get(globalconf
.connection
, screen_nbr
)->root
,
496 ewmh_init(screen_nbr
);
497 systray_init(screen_nbr
);
500 /* init spawn (sn) */
503 /* Parse and run configuration file */
504 if (!luaA_parserc(&xdg
, confpath
, true))
505 fatal("couldn't find any rc file");
511 /* scan existing windows */
514 /* we will receive events, stop grabbing server */
515 xcb_ungrab_server(globalconf
.connection
);
516 xcb_flush(globalconf
.connection
);
518 /* main event loop */
519 ev_loop(globalconf
.loop
, 0);
521 /* cleanup event loop */
522 ev_ref(globalconf
.loop
);
523 ev_check_stop(globalconf
.loop
, &xcheck
);
524 ev_ref(globalconf
.loop
);
525 ev_prepare_stop(globalconf
.loop
, &a_refresh
);
526 ev_ref(globalconf
.loop
);
527 ev_io_stop(globalconf
.loop
, &xio
);
534 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80