static void run(char *startup_cmd);

static void setup(void);

}
void
run(char *startup_cmd)
{
	pid_t startup_pid = -1;
	/* Add a Unix socket to the Wayland display. */
	const char *socket = wl_display_add_socket_auto(wl_display);
	if (!socket) {
		wlr_backend_destroy(backend);
		exit(1);
	}
	/* Start the backend. This will enumerate outputs and inputs, become the DRM
	 * master, etc */
	if (!wlr_backend_start(backend)) {
		wlr_backend_destroy(backend);
		wl_display_destroy(wl_display);
		exit(1);
	}
	/* Set the WAYLAND_DISPLAY environment variable to our socket and run the
	 * startup command if requested. */
	setenv("WAYLAND_DISPLAY", socket, true);
	if (startup_cmd) {
		startup_pid = fork();
		if (startup_pid < 0) {
			perror("startup: fork");
			wl_display_destroy(wl_display);
			exit(1);
		}
		if (startup_pid == 0) {
			execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL);
			perror("startup: execl");
			wl_display_destroy(wl_display);
			exit(1);
		}
	}
	/* Run the Wayland event loop. This does not return until you exit the
	 * compositor. Starting the backend rigged up all of the necessary event
	 * loop configuration to listen to libinput events, DRM events, generate
	 * frame events at the refresh rate, and so on. */
	wlr_log(WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s",
			socket);
	wl_display_run(wl_display);
	if (startup_cmd) {
		kill(startup_pid, SIGTERM);
		waitpid(startup_pid, NULL, 0);
	}

spawn(const Arg *arg)

setup(void)

	if (fork() == 0) {
		setsid();
		execvp(((char **)arg->v)[0], (char **)arg->v);
		fprintf(stderr, "dwl: execvp %s", ((char **)arg->v)[0]);
		perror(" failed");
		exit(EXIT_FAILURE);
	}
}
void
unmapnotify(struct wl_listener *listener, void *data)
{
	/* Called when the surface is unmapped, and should no longer be shown. */
	Client *c = wl_container_of(listener, c, unmap);
	c->mapped = false;
}
Client *
xytoclient(double lx, double ly,
		struct wlr_surface **surface, double *sx, double *sy)
{
	/* This iterates over all of our surfaces and attempts to find one under the
	 * cursor. This relies on clients being ordered from top-to-bottom. */
	Client *c;
	wl_list_for_each(c, &clients, link) {
		if (xytosurface(c, lx, ly, surface, sx, sy)) {
			return c;
		}
	}
	return NULL;
}
bool
xytosurface(Client *c, double lx, double ly,
		struct wlr_surface **surface, double *sx, double *sy)
{
	/*
	 * XDG toplevels may have nested surfaces, such as popup windows for context
	 * menus or tooltips. This function tests if any of those are underneath the
	 * coordinates lx and ly (in output Layout Coordinates). If so, it sets the
	 * surface pointer to that wlr_surface and the sx and sy coordinates to the
	 * coordinates relative to that surface's top-left corner.
	 */
	double client_sx = lx - c->x;
	double client_sy = ly - c->y;
	struct wlr_surface_state *state = &c->xdg_surface->surface->current;
	double _sx, _sy;
	struct wlr_surface *_surface = NULL;
	_surface = wlr_xdg_surface_surface_at(
			c->xdg_surface, client_sx, client_sy, &_sx, &_sy);
	if (_surface != NULL) {
		*sx = _sx;
		*sy = _sy;
		*surface = _surface;
		return true;
	}
	return false;
}
int
main(int argc, char *argv[])
{
	wlr_log_init(WLR_DEBUG, NULL);
	char *startup_cmd = NULL;
	pid_t startup_pid = -1;
	int c;
	while ((c = getopt(argc, argv, "s:h")) != -1) {
		switch (c) {
		case 's':
			startup_cmd = optarg;
			break;
		default:
			printf("Usage: %s [-s startup command]\n", argv[0]);
			return 0;
		}
	}
	if (optind < argc) {
		printf("Usage: %s [-s startup command]\n", argv[0]);
		return 0;
	}
	/* The Wayland display is managed by libwayland. It handles accepting
	 * clients from the Unix socket, manging Wayland globals, and so on. */
	wl_display = wl_display_create();

}

	/* Add a Unix socket to the Wayland display. */
	const char *socket = wl_display_add_socket_auto(wl_display);
	if (!socket) {
		wlr_backend_destroy(backend);
		return 1;

void
spawn(const Arg *arg)
{
	if (fork() == 0) {
		setsid();
		execvp(((char **)arg->v)[0], (char **)arg->v);
		fprintf(stderr, "dwl: execvp %s", ((char **)arg->v)[0]);
		perror(" failed");
		exit(EXIT_FAILURE);

}

	/* Start the backend. This will enumerate outputs and inputs, become the DRM
	 * master, etc */
	if (!wlr_backend_start(backend)) {
		wlr_backend_destroy(backend);
		wl_display_destroy(wl_display);
		return 1;
	}

void
unmapnotify(struct wl_listener *listener, void *data)
{
	/* Called when the surface is unmapped, and should no longer be shown. */
	Client *c = wl_container_of(listener, c, unmap);
	c->mapped = false;
}

	/* Set the WAYLAND_DISPLAY environment variable to our socket and run the
	 * startup command if requested. */
	setenv("WAYLAND_DISPLAY", socket, true);
	if (startup_cmd) {
		startup_pid = fork();
		if (startup_pid < 0) {
			perror("startup: fork");
			wl_display_destroy(wl_display);
			return 1;
		}
		if (startup_pid == 0) {
			execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL);
			perror("startup: execl");
			wl_display_destroy(wl_display);
			return 1;

Client *
xytoclient(double lx, double ly,
		struct wlr_surface **surface, double *sx, double *sy)
{
	/* This iterates over all of our surfaces and attempts to find one under the
	 * cursor. This relies on clients being ordered from top-to-bottom. */
	Client *c;
	wl_list_for_each(c, &clients, link) {
		if (xytosurface(c, lx, ly, surface, sx, sy)) {
			return c;

	/* Run the Wayland event loop. This does not return until you exit the
	 * compositor. Starting the backend rigged up all of the necessary event
	 * loop configuration to listen to libinput events, DRM events, generate
	 * frame events at the refresh rate, and so on. */
	wlr_log(WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s",
			socket);
	wl_display_run(wl_display);

	return NULL;
}
bool
xytosurface(Client *c, double lx, double ly,
		struct wlr_surface **surface, double *sx, double *sy)
{
	/*
	 * XDG toplevels may have nested surfaces, such as popup windows for context
	 * menus or tooltips. This function tests if any of those are underneath the
	 * coordinates lx and ly (in output Layout Coordinates). If so, it sets the
	 * surface pointer to that wlr_surface and the sx and sy coordinates to the
	 * coordinates relative to that surface's top-left corner.
	 */
	double client_sx = lx - c->x;
	double client_sy = ly - c->y;
	struct wlr_surface_state *state = &c->xdg_surface->surface->current;
	double _sx, _sy;
	struct wlr_surface *_surface = NULL;
	_surface = wlr_xdg_surface_surface_at(
			c->xdg_surface, client_sx, client_sy, &_sx, &_sy);
	if (_surface != NULL) {
		*sx = _sx;
		*sy = _sy;
		*surface = _surface;
		return true;
	}
	return false;
}
int
main(int argc, char *argv[])
{
	wlr_log_init(WLR_DEBUG, NULL);
	char *startup_cmd = NULL;

	if (startup_cmd) {
		kill(startup_pid, SIGTERM);
		waitpid(startup_pid, NULL, 0);

	int c;
	while ((c = getopt(argc, argv, "s:h")) != -1) {
		switch (c) {
		case 's':
			startup_cmd = optarg;
			break;
		default:
			printf("Usage: %s [-s startup command]\n", argv[0]);
			return 0;
		}
	}
	if (optind < argc) {
		printf("Usage: %s [-s startup command]\n", argv[0]);
		return 0;

	/* The Wayland display is managed by libwayland. It handles accepting
	 * clients from the Unix socket, manging Wayland globals, and so on. */
	wl_display = wl_display_create();
	setup();
	run(startup_cmd);