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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.
*
*/
#define _GNU_SOURCE
#include <getopt.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <fcntl.h>
#include <signal.h>
#include <alloca.h>
#include <xcb/xcb.h>
#include <xcb/shape.h>
#include <xcb/randr.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_atom.h>
#include <xcb/xcb_icccm.h>
#include "config.h"
#include "awesome.h"
#include "event.h"
#include "layout.h"
#include "screen.h"
#include "statusbar.h"
#include "uicb.h"
#include "window.h"
#include "client.h"
#include "focus.h"
#include "ewmh.h"
#include "xcb_event_handler.h"
#include "tag.h"
#include "common/socket.h"
#include "common/util.h"
#include "common/version.h"
#include "common/configopts.h"
#include "common/xscreen.h"
#include "common/xutil.h"
static bool running = true;
AwesomeConf globalconf;
/** Get geometry informations like XCB version, and also set 'x' and
* 'y' parameter on its parent window like Xlib does
*
* TODO: improve round-trip time?
*/
static xcb_get_geometry_reply_t *
x_get_geometry(xcb_connection_t *c, xcb_window_t w, xcb_get_geometry_reply_t *parent)
{
xcb_get_geometry_reply_t *win_geom;
win_geom = xcb_get_geometry_reply(c, xcb_get_geometry(c, w), NULL);
if(!win_geom)
return NULL;
/* Unlike XCB, Xlib set 'x' and 'y' as parent window position */
win_geom->x = parent->x;
win_geom->y = parent->y;
return win_geom;
}
typedef struct
{
xcb_get_geometry_cookie_t geom;
xcb_query_tree_cookie_t tree;
} screen_win_t;
/** Scan X to find windows to manage
*/
static void
scan()
{
unsigned int i;
int screen, real_screen;
xcb_window_t w;
xcb_window_t *wins = NULL;
xcb_query_tree_reply_t *r_query_tree;
xcb_get_geometry_reply_t *parent_geom, *win_geom;
xcb_get_window_attributes_reply_t *reply_win;
xcb_get_window_attributes_cookie_t *cookies_win;
const int screen_max = xcb_setup_roots_length (xcb_get_setup (globalconf.connection));
screen_win_t *parents = alloca(sizeof(screen_win_t) * screen_max);
for(screen = 0; screen < screen_max; screen++)
{
w = root_window(globalconf.connection, screen);
/* Get parent geometry informations, useful to get the real
* coordinates of the window because Xlib set 'x' and 'y'
* fields to the relative position within the parent window */
parents[screen].geom = xcb_get_geometry(globalconf.connection, w);
/* Get the window tree */
parents[screen].tree = xcb_query_tree_unchecked(globalconf.connection, w);
}
for(screen = 0; screen < screen_max; screen++)
{
parent_geom = xcb_get_geometry_reply (globalconf.connection,
parents[screen].geom, NULL);
if(!parent_geom)
continue;
r_query_tree = xcb_query_tree_reply(globalconf.connection,
parents[screen].tree, NULL);
if(!r_query_tree)
{
p_delete(&parent_geom);
continue;
}
wins = xcb_query_tree_children(r_query_tree);
/* Store the answers of 'xcb_get_window_attributes' for all
* child windows */
cookies_win = p_new(xcb_get_window_attributes_cookie_t,
r_query_tree->children_len);
/* Send all the requests at the same time */
for(i = 0; i < r_query_tree->children_len; i++)
cookies_win[i] = xcb_get_window_attributes(globalconf.connection, wins[i]);
/* Now process the answers */
for(i = 0; i < r_query_tree->children_len; i++)
{
reply_win = xcb_get_window_attributes_reply(globalconf.connection,
cookies_win[i],
NULL);
if(reply_win && !reply_win->override_redirect &&
(reply_win->map_state == XCB_MAP_STATE_VIEWABLE ||
window_getstate(wins[i]) == XCB_WM_ICONIC_STATE))
{
/* TODO: should maybe be asynchronous */
win_geom = x_get_geometry(globalconf.connection, w, parent_geom);
if(!win_geom)
{
p_delete(&reply_win);
continue;
}
real_screen = screen_get_bycoord(globalconf.screens_info, screen, win_geom->x, win_geom->y);
client_manage(wins[i], win_geom, real_screen);
/* win_geom is not useful anymore */
p_delete(&win_geom);
}
if(reply_win)
p_delete(&reply_win);
}
p_delete(&parent_geom);
p_delete(&r_query_tree);
p_delete(&cookies_win);
}
}
/** Equivalent to 'XCreateFontCursor()', error are handled by the
* default current error handler
* \param cursor_font type of cursor to use
* \return allocated cursor font
*/
static xcb_cursor_t
create_font_cursor(unsigned int cursor_font)
{
xcb_font_t font;
xcb_cursor_t cursor;
/* Get the font for the cursor*/
font = xcb_generate_id(globalconf.connection);
xcb_open_font(globalconf.connection, font, strlen ("cursor"), "cursor");
cursor = xcb_generate_id(globalconf.connection);
xcb_create_glyph_cursor (globalconf.connection, cursor, font, font,
cursor_font, cursor_font + 1,
0, 0, 0,
0, 0, 0);
return cursor;
}
/** 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)))
{
eprint("another window manager is already running\n");
}
/** Quit awesome.
* \param screen Screen ID
* \param arg nothing
* \ingroup ui_callback
*/
void
uicb_quit(int screen __attribute__ ((unused)), char *arg __attribute__ ((unused)))
{
running = false;
}
static void
exit_on_signal(int sig __attribute__ ((unused)))
{
running = false;
}
/** \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 edpy display ref
* \param ee XErrorEvent 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)
{
/*
* Get the request code, taken from 'xcb-util/wm'. I can't figure
* out how it works BTW, seems to get a byte in 'pad' member
* (second byte in second element of the array)
*/
uint8_t request_code = (e->response_type == 0 ? *((uint8_t *) e + 10) : e->response_type);
if(e->error_code == BadWindow
|| (e->error_code == BadMatch && request_code == XCB_SET_INPUT_FOCUS)
|| (e->error_code == BadValue && request_code == XCB_KILL_CLIENT)
|| (request_code == XCB_CONFIGURE_WINDOW && e->error_code == BadMatch))
return 0;
warn("fatal error: request=%s, error=%s\n",
x_label_request[request_code], x_label_error[e->error_code]);
/*
* Xlib code was using default X error handler, namely
* '_XDefaultError()', which displays more informations about the
* error and also exit if 'error_code'' equals to
* 'BadImplementation'
*
* TODO: display more informations about the error (like the Xlib
* default error handler)
*/
if(e->error_code == BadImplementation)
exit(1);
return 0;
}
/** Print help and exit(2) with given 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\
-s --sync enable synchronization (X debug)\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 buf[1024];
const char *confpath = NULL;
int r, xfd, csfd, i, screen_nbr, opt;
ssize_t cmdlen = 1;
const xcb_query_extension_reply_t *shape_query, *randr_query;
Statusbar *statusbar;
fd_set rd;
xcb_generic_event_t *ev;
xcb_connection_t *conn;
struct sockaddr_un *addr;
Client *c;
bool confcheck = false;
static struct option long_options[] =
{
{"help", 0, NULL, 'h'},
{"version", 0, NULL, 'v'},
{"check", 0, NULL, 'k'},
{"config", 1, NULL, 'c'},
{"sync", 0, NULL, 's'},
{NULL, 0, NULL, 0}
};
/* save argv */
for(i = 0; i < argc; i++)
cmdlen += a_strlen(argv[i]) + 1;
globalconf.argv = p_new(char, cmdlen);
a_strcpy(globalconf.argv, cmdlen, argv[0]);
for(i = 1; i < argc; i++)
{
a_strcat(globalconf.argv, cmdlen, " ");
a_strcat(globalconf.argv, cmdlen, argv[i]);
}
/* check args */
while((opt = getopt_long(argc, argv, "vhkc:s",
long_options, NULL)) != -1)
switch(opt)
{
case 'v':
eprint_version("awesome");
break;
case 'h':
exit_help(EXIT_SUCCESS);
break;
case 'c':
if(a_strlen(optarg))
confpath = a_strdup(optarg);
else
eprint("-c option requires a file name\n");
break;
case 'k':
confcheck = true;
break;
}
/* Text won't be printed correctly otherwise */
setlocale(LC_CTYPE, "");
if(confcheck)
return config_check(confpath);
/* X stuff */
conn = xcb_connect(NULL, &(globalconf.default_screen));
if(xcb_connection_has_error(conn))
eprint("cannot open display\n");
xfd = xcb_get_file_descriptor(conn);
/* Allocate a handler which will holds all errors and events */
globalconf.evenths = xcb_alloc_event_handlers(conn);
xcb_set_error_handler_catch_all(globalconf.evenths, xerrorstart, NULL);
const uint32_t select_input_val = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
for(screen_nbr = 0;
screen_nbr < xcb_setup_roots_length(xcb_get_setup(conn));
screen_nbr++)
{
/* this causes an error if some other window manager is
* running */
xcb_change_window_attributes(conn,
root_window(conn, screen_nbr),
XCB_CW_EVENT_MASK, &select_input_val);
}
/* need to xcb_flush to validate error handler */
xcb_aux_sync(conn);
/* process all errors in the queue if any */
xcb_poll_for_event_loop(globalconf.evenths);
/* set the default xerror handler */
xcb_set_error_handler_catch_all(globalconf.evenths, xerror, NULL);
/* TODO
if(xsync)
XSynchronize(dpy, true);
*/
/* Allocate the key symbols */
globalconf.keysyms = xcb_key_symbols_alloc(conn);
/* Get the NumLock, ShiftLock and CapsLock masks */
xutil_get_lock_mask(conn, globalconf.keysyms, &globalconf.numlockmask,
&globalconf.shiftlockmask, &globalconf.capslockmask);
/* store connection */
globalconf.connection = conn;
/* init EWMH atoms */
ewmh_init_atoms();
/* init screens struct */
globalconf.screens_info = screensinfo_new(conn);
globalconf.screens = p_new(VirtScreen, globalconf.screens_info->nscreen);
focus_add_client(NULL);
/* parse config */
config_parse(confpath);
/* init cursors */
globalconf.cursor[CurNormal] = create_font_cursor(CURSOR_LEFT_PTR);
globalconf.cursor[CurResize] = create_font_cursor(CURSOR_SIZING);
globalconf.cursor[CurMove] = create_font_cursor(CURSOR_FLEUR);
/* for each virtual screen */
for(screen_nbr = 0; screen_nbr < globalconf.screens_info->nscreen; screen_nbr++)
{
/* view at least one tag */
tag_view(globalconf.screens[screen_nbr].tags, true);
for(statusbar = globalconf.screens[screen_nbr].statusbar; statusbar; statusbar = statusbar->next)
statusbar_init(statusbar);
}
/* 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,
globalconf.cursor[CurNormal]
};
/* do this only for real screen */
for(screen_nbr = 0;
screen_nbr < xcb_setup_roots_length(xcb_get_setup(conn));
screen_nbr++)
{
xcb_change_window_attributes(globalconf.connection,
root_window(globalconf.connection, screen_nbr),
XCB_CW_EVENT_MASK | XCB_CW_CURSOR,
change_win_vals);
ewmh_set_supported_hints(screen_nbr);
/* call this to at least grab root window clicks */
window_root_grabbuttons(screen_nbr);
window_root_grabkeys(screen_nbr);
}
/* scan existing windows */
scan();
/* process all errors in the queue if any */
xcb_poll_for_event_loop(globalconf.evenths);
set_button_press_event_handler(globalconf.evenths, event_handle_buttonpress, NULL);
set_configure_request_event_handler(globalconf.evenths, event_handle_configurerequest, NULL);
set_configure_notify_event_handler(globalconf.evenths, event_handle_configurenotify, NULL);
set_destroy_notify_event_handler(globalconf.evenths, event_handle_destroynotify, NULL);
set_enter_notify_event_handler(globalconf.evenths, event_handle_enternotify, NULL);
set_expose_event_handler(globalconf.evenths, event_handle_expose, NULL);
set_key_press_event_handler(globalconf.evenths, event_handle_keypress, NULL);
set_mapping_notify_event_handler(globalconf.evenths, event_handle_mappingnotify, NULL);
set_map_request_event_handler(globalconf.evenths, event_handle_maprequest, NULL);
set_property_notify_event_handler(globalconf.evenths, event_handle_propertynotify, NULL);
set_unmap_notify_event_handler(globalconf.evenths, event_handle_unmapnotify, NULL);
set_client_message_event_handler(globalconf.evenths, event_handle_clientmessage, NULL);
/* check for shape extension */
shape_query = xcb_get_extension_data(conn, &xcb_shape_id);
if((globalconf.have_shape = shape_query->present))
xcb_set_event_handler(globalconf.evenths, (shape_query->first_event + XCB_SHAPE_NOTIFY),
(xcb_generic_event_handler_t) event_handle_shape, NULL);
/* check for randr extension */
randr_query = xcb_get_extension_data(conn, &xcb_randr_id);
if((globalconf.have_randr = randr_query->present))
xcb_set_event_handler(globalconf.evenths, (randr_query->first_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY),
(xcb_generic_event_handler_t) event_handle_randr_screen_change_notify,
NULL);
xcb_aux_sync(conn);
/* get socket fd */
csfd = socket_getclient();
addr = socket_getaddr(getenv("DISPLAY"));
if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
{
if(errno == EADDRINUSE)
{
if(unlink(addr->sun_path))
warn("error unlinking existing file: %s\n", strerror(errno));
if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
warn("error binding UNIX domain socket: %s\n", strerror(errno));
}
else
warn("error binding UNIX domain socket: %s\n", strerror(errno));
}
/* register function for signals */
signal(SIGINT, &exit_on_signal);
signal(SIGTERM, &exit_on_signal);
signal(SIGHUP, &exit_on_signal);
/* refresh everything before waiting events */
statusbar_refresh();
layout_refresh();
/* main event loop, also reads status text from socket */
while(running)
{
FD_ZERO(&rd);
if(csfd >= 0)
FD_SET(csfd, &rd);
FD_SET(xfd, &rd);
if(select(MAX(xfd, csfd) + 1, &rd, NULL, NULL, NULL) == -1)
{
if(errno == EINTR)
continue;
eprint("select failed\n");
}
if(csfd >= 0 && FD_ISSET(csfd, &rd))
switch (r = recv(csfd, buf, sizeof(buf)-1, MSG_TRUNC))
{
case -1:
warn("error reading UNIX domain socket: %s\n", strerror(errno));
csfd = -1;
break;
case 0:
break;
default:
if(r >= ssizeof(buf))
break;
buf[r] = '\0';
parse_control(buf);
statusbar_refresh();
layout_refresh();
}
/* two level XPending:
* we need to first check we have XEvent to handle
* and if so, we handle them all in a round.
* Then when we have refresh()'ed stuff so maybe new XEvent
* are available and select() won't tell us, so let's check
* with XPending() again.
*/
while((ev = xcb_poll_for_event(conn)))
{
do
{
xcb_handle_event(globalconf.evenths, ev);
/* need to resync */
xcb_aux_sync(conn);
} while((ev = xcb_poll_for_event(conn)));
statusbar_refresh();
layout_refresh();
/* need to resync */
xcb_aux_sync(conn);
}
}
if(csfd > 0 && close(csfd))
warn("error closing UNIX domain socket: %s\n", strerror(errno));
if(unlink(addr->sun_path))
warn("error unlinking UNIX domain socket: %s\n", strerror(errno));
p_delete(&addr);
/* remap all clients since some WM won't handle them otherwise */
for(c = globalconf.clients; c; c = c->next)
client_unban(c);
xcb_aux_sync(globalconf.connection);
xcb_disconnect(conn);
return EXIT_SUCCESS;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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