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awesome/awesome.c

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/*
* awesome.c - awesome main functions
*
* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <getopt.h>
#include <locale.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <xcb/xtest.h>
#include <xcb/xcb_event.h>
#include "awesome.h"
#include "spawn.h"
#include "objects/client.h"
#include "window.h"
#include "ewmh.h"
#include "dbus.h"
#include "systray.h"
#include "event.h"
#include "property.h"
#include "screen.h"
#include "luaa.h"
#include "common/version.h"
#include "common/atoms.h"
#include "common/xcursor.h"
#include "common/xutil.h"
#include "common/backtrace.h"
awesome_t globalconf;
/** argv used to run awesome */
static char *awesome_argv;
typedef struct
{
xcb_window_t id;
xcb_query_tree_cookie_t tree_cookie;
} root_win_t;
/** Call before exiting.
*/
void
awesome_atexit(void)
{
int screen_nbr, nscreens;
signal_object_emit(globalconf.L, &global_signals, "exit", 0);
a_dbus_cleanup();
/* reparent systray windows, otherwise they may die with their master */
for(int i = 0; i < globalconf.embedded.len; i++)
{
xcb_screen_t *s = xutil_screen_get(globalconf.connection,
globalconf.embedded.tab[i].phys_screen);
xembed_window_unembed(globalconf.connection, globalconf.embedded.tab[i].win, s->root);
}
/* do this only for real screen */
const xcb_setup_t *setup = xcb_get_setup(globalconf.connection);
nscreens = setup ? xcb_setup_roots_length(setup) : -1;
for(screen_nbr = 0;
screen_nbr < nscreens;
screen_nbr++)
systray_cleanup(screen_nbr);
/* remap all clients since some WM won't handle them otherwise */
foreach(c, globalconf.clients)
client_unban(*c);
/* Close Lua */
lua_close(globalconf.L);
xcb_flush(globalconf.connection);
/* Disconnect *after* closing lua */
xcb_disconnect(globalconf.connection);
ev_default_destroy();
}
/** Scan X to find windows to manage.
*/
static void
scan(void)
{
int i, phys_screen, tree_c_len;
const int screen_max = xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
root_win_t root_wins[screen_max];
xcb_query_tree_reply_t *tree_r;
xcb_window_t *wins = NULL;
xcb_get_window_attributes_reply_t *attr_r;
xcb_get_geometry_reply_t *geom_r;
long state;
for(phys_screen = 0; phys_screen < screen_max; phys_screen++)
{
/* Get the root window ID associated to this screen */
root_wins[phys_screen].id = xutil_screen_get(globalconf.connection, phys_screen)->root;
/* Get the window tree associated to this screen */
root_wins[phys_screen].tree_cookie = xcb_query_tree_unchecked(globalconf.connection,
root_wins[phys_screen].id);
}
for(phys_screen = 0; phys_screen < screen_max; phys_screen++)
{
tree_r = xcb_query_tree_reply(globalconf.connection,
root_wins[phys_screen].tree_cookie,
NULL);
if(!tree_r)
continue;
/* Get the tree of the children windows of the current root window */
if(!(wins = xcb_query_tree_children(tree_r)))
fatal("cannot get tree children");
tree_c_len = xcb_query_tree_children_length(tree_r);
xcb_get_window_attributes_cookie_t attr_wins[tree_c_len];
xcb_get_property_cookie_t state_wins[tree_c_len];
for(i = 0; i < tree_c_len; i++)
{
attr_wins[i] = xcb_get_window_attributes_unchecked(globalconf.connection,
wins[i]);
state_wins[i] = window_state_get_unchecked(wins[i]);
}
xcb_get_geometry_cookie_t *geom_wins[tree_c_len];
for(i = 0; i < tree_c_len; i++)
{
attr_r = xcb_get_window_attributes_reply(globalconf.connection,
attr_wins[i],
NULL);
state = window_state_get_reply(state_wins[i]);
if(!attr_r || attr_r->override_redirect
|| attr_r->map_state == XCB_MAP_STATE_UNVIEWABLE
|| state == XCB_WM_STATE_WITHDRAWN)
{
geom_wins[i] = NULL;
p_delete(&attr_r);
continue;
}
p_delete(&attr_r);
/* Get the geometry of the current window */
geom_wins[i] = p_alloca(xcb_get_geometry_cookie_t, 1);
*(geom_wins[i]) = xcb_get_geometry_unchecked(globalconf.connection, wins[i]);
}
for(i = 0; i < tree_c_len; i++)
{
if(!geom_wins[i] || !(geom_r = xcb_get_geometry_reply(globalconf.connection,
*(geom_wins[i]), NULL)))
continue;
/* The window can be mapped, so force it to be undrawn for startup */
xcb_unmap_window(globalconf.connection, wins[i]);
client_manage(wins[i], geom_r, phys_screen, true);
p_delete(&geom_r);
}
p_delete(&tree_r);
}
}
static void
a_refresh_cb(EV_P_ ev_prepare *w, int revents)
{
awesome_refresh();
}
static void
a_xcb_check_cb(EV_P_ ev_check *w, int revents)
{
xcb_generic_event_t *mouse = NULL, *event;
while((event = xcb_poll_for_event(globalconf.connection)))
{
/* We will treat mouse events later.
* We cannot afford to treat all mouse motion events,
* because that would be too much CPU intensive, so we just
* take the last we get after a bunch of events. */
if(XCB_EVENT_RESPONSE_TYPE(event) == XCB_MOTION_NOTIFY)
{
p_delete(&mouse);
mouse = event;
}
else
{
xcb_event_handle(&globalconf.evenths, event);
p_delete(&event);
}
}
if(mouse)
{
xcb_event_handle(&globalconf.evenths, mouse);
p_delete(&mouse);
}
}
static void
a_xcb_io_cb(EV_P_ ev_io *w, int revents)
{
/* empty */
}
/** Startup Error handler to check if another window manager
* is already running.
* \param data Additional optional parameters data.
* \param c X connection.
* \param error Error event.
*/
static int __attribute__ ((noreturn))
xerrorstart(void * data __attribute__ ((unused)),
xcb_connection_t * c __attribute__ ((unused)),
xcb_generic_error_t * error __attribute__ ((unused)))
{
fatal("another window manager is already running");
}
static void
signal_fatal(int signum)
{
buffer_t buf;
backtrace_get(&buf);
fatal("dumping backtrace\n%s", buf.s);
}
/** Function to exit on some signals.
* \param w the signal received, unused
* \param revents currently unused
*/
static void
exit_on_signal(EV_P_ ev_signal *w, int revents)
{
ev_unloop(EV_A_ 1);
}
void
awesome_restart(void)
{
awesome_atexit();
a_exec(awesome_argv);
}
/** Function to restart awesome on some signals.
* \param w the signal received, unused
* \param revents Currently unused
*/
static void
restart_on_signal(EV_P_ ev_signal *w, int revents)
{
awesome_restart();
}
/** \brief awesome xerror function.
* There's no way to check accesses to destroyed windows, thus those cases are
* ignored (especially on UnmapNotify's). Other types of errors call Xlibs
* default error handler, which may call exit.
* \param data Currently unused.
* \param c The connection to the X server.
* \param e The error event.
* \return 0 if no error, or xerror's xlib return status.
*/
static int
xerror(void *data __attribute__ ((unused)),
xcb_connection_t *c __attribute__ ((unused)),
xcb_generic_error_t *e)
{
/* ignore this */
if(e->error_code == XCB_EVENT_ERROR_BAD_WINDOW
|| (e->error_code == XCB_EVENT_ERROR_BAD_MATCH
&& e->major_code == XCB_SET_INPUT_FOCUS)
|| (e->error_code == XCB_EVENT_ERROR_BAD_VALUE
&& e->major_code == XCB_KILL_CLIENT)
|| (e->major_code == XCB_CONFIGURE_WINDOW
&& e->error_code == XCB_EVENT_ERROR_BAD_MATCH))
return 0;
warn("X error: request=%s, error=%s",
xcb_event_get_request_label(e->major_code),
xcb_event_get_error_label(e->error_code));
return 0;
}
/** Print help and exit(2) with given exit_code.
* \param exit_code The exit code.
*/
static void __attribute__ ((noreturn))
exit_help(int exit_code)
{
FILE *outfile = (exit_code == EXIT_SUCCESS) ? stdout : stderr;
fprintf(outfile,
"Usage: awesome [OPTION]\n\
-h, --help show help\n\
-v, --version show version\n\
-c, --config FILE configuration file to use\n\
-k, --check check configuration file syntax\n");
exit(exit_code);
}
/** Hello, this is main.
* \param argc Who knows.
* \param argv Who knows.
* \return EXIT_SUCCESS I hope.
*/
int
main(int argc, char **argv)
{
char *confpath = NULL;
int xfd, i, screen_nbr, opt, colors_nbr;
xcolor_init_request_t colors_reqs[2];
ssize_t cmdlen = 1;
xdgHandle xdg;
static struct option long_options[] =
{
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'v' },
{ "config", 1, NULL, 'c' },
{ "check", 0, NULL, 'k' },
{ NULL, 0, NULL, 0 }
};
/* event loop watchers */
ev_io xio = { .fd = -1 };
ev_check xcheck;
ev_prepare a_refresh;
ev_signal sigint;
ev_signal sigterm;
ev_signal sighup;
/* clear the globalconf structure */
p_clear(&globalconf, 1);
globalconf.keygrabber = LUA_REFNIL;
globalconf.mousegrabber = LUA_REFNIL;
/* save argv */
for(i = 0; i < argc; i++)
cmdlen += a_strlen(argv[i]) + 1;
awesome_argv = p_new(char, cmdlen);
a_strcpy(awesome_argv, cmdlen, argv[0]);
for(i = 1; i < argc; i++)
{
a_strcat(awesome_argv, cmdlen, " ");
a_strcat(awesome_argv, cmdlen, argv[i]);
}
/* Text won't be printed correctly otherwise */
setlocale(LC_CTYPE, "");
/* Get XDG basedir data */
xdgInitHandle(&xdg);
/* init lua */
luaA_init(&xdg);
/* check args */
while((opt = getopt_long(argc, argv, "vhkc:",
long_options, NULL)) != -1)
switch(opt)
{
case 'v':
eprint_version();
break;
case 'h':
exit_help(EXIT_SUCCESS);
break;
case 'k':
if(!luaA_parserc(&xdg, confpath, false))
{
fprintf(stderr, "✘ Configuration file syntax error.\n");
return EXIT_FAILURE;
}
else
{
fprintf(stderr, "✔ Configuration file syntax OK.\n");
return EXIT_SUCCESS;
}
case 'c':
if(a_strlen(optarg))
confpath = a_strdup(optarg);
else
fatal("-c option requires a file name");
break;
}
globalconf.loop = ev_default_loop(0);
/* register function for signals */
ev_signal_init(&sigint, exit_on_signal, SIGINT);
ev_signal_init(&sigterm, exit_on_signal, SIGTERM);
ev_signal_init(&sighup, restart_on_signal, SIGHUP);
ev_signal_start(globalconf.loop, &sigint);
ev_signal_start(globalconf.loop, &sigterm);
ev_signal_start(globalconf.loop, &sighup);
ev_unref(globalconf.loop);
ev_unref(globalconf.loop);
ev_unref(globalconf.loop);
struct sigaction sa = { .sa_handler = signal_fatal, .sa_flags = 0 };
sigemptyset(&sa.sa_mask);
sigaction(SIGSEGV, &sa, 0);
/* X stuff */
globalconf.connection = xcb_connect(NULL, &globalconf.default_screen);
if(xcb_connection_has_error(globalconf.connection))
fatal("cannot open display");
/* check for xtest extension */
const xcb_query_extension_reply_t *xtest_query;
xtest_query = xcb_get_extension_data(globalconf.connection, &xcb_test_id);
globalconf.have_xtest = xtest_query->present;
/* initialize dbus */
a_dbus_init();
/* Grab server */
xcb_grab_server(globalconf.connection);
xcb_flush(globalconf.connection);
/* Get the file descriptor corresponding to the X connection */
xfd = xcb_get_file_descriptor(globalconf.connection);
ev_io_init(&xio, &a_xcb_io_cb, xfd, EV_READ);
ev_io_start(globalconf.loop, &xio);
ev_check_init(&xcheck, &a_xcb_check_cb);
ev_check_start(globalconf.loop, &xcheck);
ev_unref(globalconf.loop);
ev_prepare_init(&a_refresh, &a_refresh_cb);
ev_prepare_start(globalconf.loop, &a_refresh);
ev_unref(globalconf.loop);
/* Allocate a handler which will holds all errors and events */
xcb_event_handlers_init(globalconf.connection, &globalconf.evenths);
xutil_error_handler_catch_all_set(&globalconf.evenths, xerrorstart, NULL);
for(screen_nbr = 0;
screen_nbr < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
screen_nbr++)
{
const uint32_t select_input_val = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
/* This causes an error if some other window manager is running */
xcb_change_window_attributes(globalconf.connection,
xutil_screen_get(globalconf.connection, screen_nbr)->root,
XCB_CW_EVENT_MASK, &select_input_val);
}
/* Need to xcb_flush to validate error handler */
xcb_aux_sync(globalconf.connection);
/* Process all errors in the queue if any */
xcb_event_poll_for_event_loop(&globalconf.evenths);
/* Set the default xerror handler */
xutil_error_handler_catch_all_set(&globalconf.evenths, xerror, NULL);
/* Allocate the key symbols */
globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
xcb_get_modifier_mapping_cookie_t xmapping_cookie =
xcb_get_modifier_mapping_unchecked(globalconf.connection);
/* init atom cache */
atoms_init(globalconf.connection);
/* init screens information */
screen_scan();
/* init default font and colors */
colors_reqs[0] = xcolor_init_unchecked(&globalconf.colors.fg,
"black", sizeof("black") - 1);
colors_reqs[1] = xcolor_init_unchecked(&globalconf.colors.bg,
"white", sizeof("white") - 1);
globalconf.font = draw_font_new("sans 8");
for(colors_nbr = 0; colors_nbr < 2; colors_nbr++)
xcolor_init_reply(colors_reqs[colors_nbr]);
xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
globalconf.keysyms, &globalconf.numlockmask,
&globalconf.shiftlockmask, &globalconf.capslockmask,
&globalconf.modeswitchmask);
/* do this only for real screen */
for(screen_nbr = 0;
screen_nbr < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
screen_nbr++)
{
/* select for events */
const uint32_t change_win_vals[] =
{
XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY
| XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_LEAVE_WINDOW
| XCB_EVENT_MASK_STRUCTURE_NOTIFY
| XCB_EVENT_MASK_PROPERTY_CHANGE
| XCB_EVENT_MASK_BUTTON_PRESS
| XCB_EVENT_MASK_BUTTON_RELEASE
| XCB_EVENT_MASK_FOCUS_CHANGE
};
xcb_change_window_attributes(globalconf.connection,
xutil_screen_get(globalconf.connection, screen_nbr)->root,
XCB_CW_EVENT_MASK,
change_win_vals);
ewmh_init(screen_nbr);
systray_init(screen_nbr);
}
/* init spawn (sn) */
spawn_init();
/* Parse and run configuration file */
if (!luaA_parserc(&xdg, confpath, true))
fatal("couldn't find any rc file");
p_delete(&confpath);
xdgWipeHandle(&xdg);
/* scan existing windows */
scan();
/* process all errors in the queue if any */
xcb_event_poll_for_event_loop(&globalconf.evenths);
a_xcb_set_event_handlers();
a_xcb_set_property_handlers();
/* we will receive events, stop grabbing server */
xcb_ungrab_server(globalconf.connection);
xcb_flush(globalconf.connection);
/* main event loop */
ev_loop(globalconf.loop, 0);
/* cleanup event loop */
ev_ref(globalconf.loop);
ev_check_stop(globalconf.loop, &xcheck);
ev_ref(globalconf.loop);
ev_prepare_stop(globalconf.loop, &a_refresh);
ev_ref(globalconf.loop);
ev_io_stop(globalconf.loop, &xio);
awesome_atexit();
return EXIT_SUCCESS;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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