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/*
* calmwm - the calm window manager
*
* Copyright (c) 2004 Marius Aamodt Eriksen <marius@monkey.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* $OpenBSD: calmwm.c,v 1.114 2020/03/24 14:48:29 okan Exp $
*/
#include <sys/types.h>
#include "queue.h"
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <locale.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifndef __dead
#define __dead __attribute__((noreturn))
#endif
#include "calmwm.h"
Display *X_Dpy;
Time Last_Event_Time = CurrentTime;
Atom cwmh[CWMH_NITEMS];
Atom ewmh[EWMH_NITEMS];
struct screen_q Screenq = TAILQ_HEAD_INITIALIZER(Screenq);
struct conf Conf;
volatile sig_atomic_t cwm_status;
__dead void usage(void);
static void sighdlr(int);
static int x_errorhandler(Display *, XErrorEvent *);
static int x_init(const char *);
static void x_teardown(void);
static int x_wmerrorhandler(Display *, XErrorEvent *);
int
main(int argc, char **argv)
{
char *display_name = NULL;
char **saved_argv;
int ch, xfd, nflag = 0;
struct pollfd pfd[1];
if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
warnx("no locale support");
mbtowc(NULL, NULL, MB_CUR_MAX);
conf_init(&Conf);
saved_argv = argv;
while ((ch = getopt(argc, argv, "c:d:nv")) != -1) {
switch (ch) {
case 'c':
free(Conf.conf_file);
Conf.conf_file = xstrdup(optarg);
break;
case 'd':
display_name = optarg;
break;
case 'n':
nflag = 1;
break;
case 'v':
Conf.debug++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (signal(SIGCHLD, sighdlr) == SIG_ERR ||
signal(SIGHUP, sighdlr) == SIG_ERR ||
signal(SIGINT, sighdlr) == SIG_ERR ||
signal(SIGTERM, sighdlr) == SIG_ERR)
err(1, "signal");
if (parse_config(Conf.conf_file, &Conf) == -1) {
warnx("error parsing config file");
if (nflag)
return 1;
}
if (nflag)
return 0;
xfd = x_init(display_name);
cwm_status = CWM_RUNNING;
#ifdef __OpenBSD__
if (pledge("stdio rpath proc exec", NULL) == -1)
err(1, "pledge");
#endif
memset(&pfd, 0, sizeof(pfd));
pfd[0].fd = xfd;
pfd[0].events = POLLIN;
while (cwm_status == CWM_RUNNING) {
xev_process();
if (poll(pfd, 1, -1) == -1) {
if (errno != EINTR)
warn("poll");
}
}
x_teardown();
if (cwm_status == CWM_EXEC_WM) {
execvp(saved_argv[0], saved_argv);
warnx("failed to re-exec");
}
return 0;
}
static int
x_init(const char *dpyname)
{
int i;
if ((X_Dpy = XOpenDisplay(dpyname)) == NULL)
errx(1, "unable to open display \"%s\"", XDisplayName(dpyname));
XSetErrorHandler(x_wmerrorhandler);
XSelectInput(X_Dpy, DefaultRootWindow(X_Dpy), SubstructureRedirectMask);
XSync(X_Dpy, False);
XSetErrorHandler(x_errorhandler);
Conf.xrandr = XRRQueryExtension(X_Dpy, &Conf.xrandr_event_base, &i);
xu_atom_init();
conf_cursor(&Conf);
for (i = 0; i < ScreenCount(X_Dpy); i++)
screen_init(i);
return ConnectionNumber(X_Dpy);
}
static void
x_teardown(void)
{
struct screen_ctx *sc;
unsigned int i;
conf_clear(&Conf);
TAILQ_FOREACH(sc, &Screenq, entry) {
for (i = 0; i < CWM_COLOR_NITEMS; i++)
XftColorFree(X_Dpy, DefaultVisual(X_Dpy, sc->which),
DefaultColormap(X_Dpy, sc->which),
&sc->xftcolor[i]);
XftFontClose(X_Dpy, sc->xftfont);
XUngrabKey(X_Dpy, AnyKey, AnyModifier, sc->rootwin);
}
XUngrabPointer(X_Dpy, CurrentTime);
XUngrabKeyboard(X_Dpy, CurrentTime);
for (i = 0; i < CF_NITEMS; i++)
XFreeCursor(X_Dpy, Conf.cursor[i]);
XSync(X_Dpy, False);
XSetInputFocus(X_Dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
XCloseDisplay(X_Dpy);
}
static int
x_wmerrorhandler(Display *dpy, XErrorEvent *e)
{
errx(1, "root window unavailable - perhaps another wm is running?");
return 0;
}
static int
x_errorhandler(Display *dpy, XErrorEvent *e)
{
#ifdef DEBUG
char msg[80], number[80], req[80];
XGetErrorText(X_Dpy, e->error_code, msg, sizeof(msg));
(void)snprintf(number, sizeof(number), "%d", e->request_code);
XGetErrorDatabaseText(X_Dpy, "XRequest", number,
"<unknown>", req, sizeof(req));
warnx("%s(0x%x): %s", req, (unsigned int)e->resourceid, msg);
#endif
return 0;
}
static void
sighdlr(int sig)
{
pid_t pid;
int save_errno = errno, status;
switch (sig) {
case SIGCHLD:
/* Collect dead children. */
while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0 ||
(pid < 0 && errno == EINTR))
;
break;
case SIGHUP:
cwm_status = CWM_EXEC_WM;
break;
case SIGINT:
case SIGTERM:
cwm_status = CWM_QUIT;
break;
}
errno = save_errno;
}
__dead void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: %s [-nv] [-c file] [-d display]\n",
__progname);
exit(1);
}
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