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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 <X11/cursorfont.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xproto.h>
#include <X11/Xutil.h>
#include <X11/extensions/shape.h>
#include <X11/extensions/Xrandr.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 "tag.h"
#include "common/socket.h"
#include "common/util.h"
#include "common/version.h"
#include "common/configopts.h"
static int (*xerrorxlib) (Display *, XErrorEvent *);
static Bool running = True;
AwesomeConf globalconf;
/** Scan X to find windows to manage
*/
static void
scan()
{
unsigned int i, num;
int screen, real_screen;
Window *wins = NULL, d1, d2;
XWindowAttributes wa;
for(screen = 0; screen < ScreenCount(globalconf.display); screen++)
{
if(XQueryTree(globalconf.display, RootWindow(globalconf.display, screen), &d1, &d2, &wins, &num))
{
for(i = 0; i < num; i++)
{
/* XGetWindowAttributes return 1 on success */
if(!XGetWindowAttributes(globalconf.display, wins[i], &wa)
|| wa.override_redirect
|| XGetTransientForHint(globalconf.display, wins[i], &d1))
continue;
if(wa.map_state == IsViewable || window_getstate(wins[i]) == IconicState)
{
real_screen = screen_get_bycoord(screen, wa.x, wa.y);
client_manage(wins[i], &wa, real_screen);
}
}
/* now the transients */
for(i = 0; i < num; i++)
{
if(!XGetWindowAttributes(globalconf.display, wins[i], &wa))
continue;
if(XGetTransientForHint(globalconf.display, wins[i], &d1)
&& (wa.map_state == IsViewable || window_getstate(wins[i]) == IconicState))
{
real_screen = screen_get_bycoord(screen, wa.x, wa.y);
client_manage(wins[i], &wa, real_screen);
}
}
}
if(wins)
XFree(wins);
}
}
/** Startup Error handler to check if another window manager
* is already running.
* \param disp Display
* \param ee Error event
*/
static int __attribute__ ((noreturn))
xerrorstart(Display * disp __attribute__ ((unused)),
XErrorEvent * ee __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(Display *edpy, XErrorEvent *ee)
{
if(ee->error_code == BadWindow
|| (ee->error_code == BadMatch && ee->request_code == X_SetInputFocus)
|| (ee->error_code == BadValue && ee->request_code == X_KillClient)
|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch))
return 0;
warn("fatal error: request code=%d, error code=%d\n", ee->request_code, ee->error_code);
return xerrorxlib(edpy, ee); /* may call exit */
}
/** 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");
exit(exit_code);
}
/** Hello, this is main
* \param argc who knows
* \param argv who knows
* \return EXIT_SUCCESS I hope
*/
typedef void event_handler (XEvent *);
int
main(int argc, char *argv[])
{
char buf[1024];
const char *confpath = NULL;
int r, xfd, e_dummy, csfd, shape_event, randr_event_base, i, screen, opt;
ssize_t cmdlen = 1;
Statusbar *statusbar;
fd_set rd;
XEvent ev;
Display * dpy;
event_handler **handler;
struct sockaddr_un *addr;
Client *c;
XSetWindowAttributes wa;
static struct option long_options[] =
{
{"help", 0, NULL, 'h'},
{"version", 0, NULL, 'v'},
{"check", 0, NULL, 'k'},
{"config", 0, NULL, 'c'},
{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:",
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 = optarg;
else
eprint("-c option requires a file name\n");
break;
case 'k':
return config_check(confpath);
break;
}
/* Text won't be printed correctly otherwise */
setlocale(LC_CTYPE, "");
/* X stuff */
if(!(dpy = XOpenDisplay(NULL)))
eprint("cannot open display\n");
xfd = ConnectionNumber(dpy);
XSetErrorHandler(xerrorstart);
for(screen = 0; screen < ScreenCount(dpy); screen++)
/* this causes an error if some other window manager is running */
XSelectInput(dpy, RootWindow(dpy, screen), SubstructureRedirectMask);
/* need to XSync to validate errorhandler */
XSync(dpy, False);
XSetErrorHandler(NULL);
xerrorxlib = XSetErrorHandler(xerror);
XSync(dpy, False);
/* store display */
globalconf.display = dpy;
/* init EWMH atoms */
ewmh_init_atoms();
/* init screens struct */
screen_build_screens();
focus_add_client(NULL);
/* parse config */
config_parse(confpath);
/* scan existing windows */
scan();
/* init cursors */
globalconf.cursor[CurNormal] = XCreateFontCursor(globalconf.display, XC_left_ptr);
globalconf.cursor[CurResize] = XCreateFontCursor(globalconf.display, XC_sizing);
globalconf.cursor[CurMove] = XCreateFontCursor(globalconf.display, XC_fleur);
/* for each virtual screen */
for(screen = 0; screen < globalconf.nscreen; screen++)
{
/* view at least one tag */
tag_view(globalconf.screens[screen].tags, True);
for(statusbar = globalconf.screens[screen].statusbar; statusbar; statusbar = statusbar->next)
statusbar_init(statusbar);
}
/* select for events */
wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
| EnterWindowMask | LeaveWindowMask | StructureNotifyMask | PointerMotionMask;
wa.cursor = globalconf.cursor[CurNormal];
/* do this only for real screen */
for(screen = 0; screen < ScreenCount(dpy); screen++)
{
XChangeWindowAttributes(globalconf.display,
RootWindow(globalconf.display, screen),
CWEventMask | CWCursor, &wa);
XSelectInput(globalconf.display,
RootWindow(globalconf.display, screen),
wa.event_mask);
ewmh_set_supported_hints(screen);
/* call this to at least grab root window clicks */
window_root_grabbuttons(screen);
window_root_grabkeys(screen);
}
handler = p_new(event_handler *, LASTEvent);
handler[ButtonPress] = event_handle_buttonpress;
handler[ConfigureRequest] = event_handle_configurerequest;
handler[ConfigureNotify] = event_handle_configurenotify;
handler[DestroyNotify] = event_handle_destroynotify;
handler[EnterNotify] = event_handle_enternotify;
handler[LeaveNotify] = event_handle_leavenotify;
handler[MotionNotify] = event_handle_motionnotify;
handler[Expose] = event_handle_expose;
handler[KeyPress] = event_handle_keypress;
handler[MappingNotify] = event_handle_mappingnotify;
handler[MapRequest] = event_handle_maprequest;
handler[PropertyNotify] = event_handle_propertynotify;
handler[UnmapNotify] = event_handle_unmapnotify;
handler[ClientMessage] = event_handle_clientmessage;
/* check for shape extension */
if((globalconf.have_shape = XShapeQueryExtension(dpy, &shape_event, &e_dummy)))
{
p_realloc(&handler, shape_event + 1);
handler[shape_event] = event_handle_shape;
}
/* check for randr extension */
if((globalconf.have_randr = XRRQueryExtension(dpy, &randr_event_base, &e_dummy)))
{
p_realloc(&handler, randr_event_base + RRScreenChangeNotify + 1);
handler[randr_event_base + RRScreenChangeNotify] = event_handle_randr_screen_change_notify;
}
XSync(dpy, False);
/* get socket fd */
csfd = get_client_socket();
addr = get_client_addr(getenv("DISPLAY"));
if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
{
if(errno == EADDRINUSE)
{
if(unlink(addr->sun_path))
perror("error unlinking existing file");
if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
perror("error binding UNIX domain socket");
}
else
perror("error binding UNIX domain socket");
}
/* 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:
perror("awesome: error reading UNIX domain socket");
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(XPending(dpy))
{
while(XPending(dpy))
{
XNextEvent(dpy, &ev);
if(handler[ev.type])
handler[ev.type](&ev);
/* need to resync */
XSync(dpy, False);
}
statusbar_refresh();
layout_refresh();
/* need to resync */
XSync(dpy, False);
}
}
if(csfd > 0 && close(csfd))
perror("error closing UNIX domain socket");
if(unlink(addr->sun_path))
perror("error unlinking UNIX domain socket");
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);
XSync(globalconf.display, False);
XCloseDisplay(dpy);
return EXIT_SUCCESS;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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