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xwayland: split server

Browse source 
Split the server part of wlr_xwayland into wlr_xwayland_server. This
allows compositors to implement their own XWM when wlroots' isn't a good
fit.
This commit is contained in:
Simon Ser 2020-05-05 10:24:08 +02:00 committed by Drew DeVault
parent d28a7da95d
commit 27609ba0d9
6 changed files with 503 additions and 411 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

39
include/wlr/xwayland.h
View file

@ -18,14 +18,11 @@
struct wlr_xwm;
struct wlr_xwayland_cursor;
struct wlr_gtk_primary_selection_device_manager;
struct wlr_xwayland {
struct wlr_xwayland_server {
pid_t pid;
struct wl_client *client;
struct wl_event_source *sigusr1_source;
struct wlr_xwm *xwm;
struct wlr_xwayland_cursor *cursor;
int wm_fd[2], wl_fd[2];
time_t server_start;
@ -38,6 +35,31 @@ struct wlr_xwayland {
struct wl_event_source *x_fd_read_event[2];
bool lazy;
struct wl_display *wl_display;
struct {
struct wl_signal ready;
struct wl_signal destroy;
} events;
struct wl_listener client_destroy;
struct wl_listener display_destroy;
void *data;
};
struct wlr_xwayland_server_ready_event {
struct wlr_xwayland_server *server;
int wm_fd;
};
struct wlr_xwayland {
struct wlr_xwayland_server *server;
struct wlr_xwm *xwm;
struct wlr_xwayland_cursor *cursor;
const char *display_name;
struct wl_display *wl_display;
struct wlr_compositor *compositor;
struct wlr_seat *seat;
@ -54,8 +76,9 @@ struct wlr_xwayland {
*/
int (*user_event_handler)(struct wlr_xwm *xwm, xcb_generic_event_t *event);
struct wl_listener server_ready;
struct wl_listener server_destroy;
struct wl_listener client_destroy;
struct wl_listener display_destroy;
struct wl_listener seat_destroy;
void *data;
@ -192,7 +215,11 @@ struct wlr_xwayland_resize_event {
uint32_t edges;
};
/** Create an Xwayland server.
struct wlr_xwayland_server *wlr_xwayland_server_create(
struct wl_display *display, bool lazy);
void wlr_xwayland_server_destroy(struct wlr_xwayland_server *server);
/** Create an Xwayland server and XWM.
*
* The server supports a lazy mode in which Xwayland is only started when a
* client tries to connect.

2
include/xwayland/xwm.h
View file

@ -138,7 +138,7 @@ struct wlr_xwm {
struct wl_listener seat_drag_source_destroy;
};
struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland);
struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland, int wm_fd);
void xwm_destroy(struct wlr_xwm *xwm);

1
xwayland/meson.build
View file

@ -54,6 +54,7 @@ wlr_files += files(
'selection/incoming.c',
'selection/outgoing.c',
'selection/selection.c',
'server.c',
'sockets.c',
'xwayland.c',
'xwm.c',

400
xwayland/server.c Normal file
View file

@ -0,0 +1,400 @@
#define _POSIX_C_SOURCE 200809L
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdlib.h>
#include <stdnoreturn.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <wayland-server-core.h>
#include <wlr/util/log.h>
#include <wlr/xwayland.h>
#include "sockets.h"
#include "util/signal.h"
static void safe_close(int fd) {
if (fd >= 0) {
close(fd);
}
}
static int fill_arg(char ***argv, const char *fmt, ...) {
int len;
char **cur_arg = *argv;
va_list args;
va_start(args, fmt);
len = vsnprintf(NULL, 0, fmt, args) + 1;
va_end(args);
while (*cur_arg) {
cur_arg++;
}
*cur_arg = malloc(len);
if (!*cur_arg) {
return -1;
}
*argv = cur_arg;
va_start(args, fmt);
len = vsnprintf(*cur_arg, len, fmt, args);
va_end(args);
return len;
}
noreturn static void exec_xwayland(struct wlr_xwayland_server *server) {
if (!set_cloexec(server->x_fd[0], false) ||
!set_cloexec(server->x_fd[1], false) ||
!set_cloexec(server->wm_fd[1], false) ||
!set_cloexec(server->wl_fd[1], false)) {
_exit(EXIT_FAILURE);
}
/* Make Xwayland signal us when it's ready */
signal(SIGUSR1, SIG_IGN);
char *argv[] = {
"Xwayland", NULL /* display, e.g. :1 */,
"-rootless", "-terminate",
"-listen", NULL /* x_fd[0] */,
"-listen", NULL /* x_fd[1] */,
"-wm", NULL /* wm_fd[1] */,
NULL,
};
char **cur_arg = argv;
if (fill_arg(&cur_arg, ":%d", server->display) < 0 ||
fill_arg(&cur_arg, "%d", server->x_fd[0]) < 0 ||
fill_arg(&cur_arg, "%d", server->x_fd[1]) < 0 ||
fill_arg(&cur_arg, "%d", server->wm_fd[1]) < 0) {
wlr_log_errno(WLR_ERROR, "alloc/print failure");
_exit(EXIT_FAILURE);
}
char wayland_socket_str[16];
snprintf(wayland_socket_str, sizeof(wayland_socket_str), "%d", server->wl_fd[1]);
setenv("WAYLAND_SOCKET", wayland_socket_str, true);
wlr_log(WLR_INFO, "WAYLAND_SOCKET=%d Xwayland :%d -rootless -terminate -listen %d -listen %d -wm %d",
server->wl_fd[1], server->display, server->x_fd[0],
server->x_fd[1], server->wm_fd[1]);
// Closes stdout/stderr depending on log verbosity
enum wlr_log_importance verbosity = wlr_log_get_verbosity();
int devnull = open("/dev/null", O_WRONLY | O_CREAT | O_CLOEXEC, 0666);
if (devnull < 0) {
wlr_log_errno(WLR_ERROR, "XWayland: failed to open /dev/null");
_exit(EXIT_FAILURE);
}
if (verbosity < WLR_INFO) {
dup2(devnull, STDOUT_FILENO);
}
if (verbosity < WLR_ERROR) {
dup2(devnull, STDERR_FILENO);
}
// This returns if and only if the call fails
execvp("Xwayland", argv);
wlr_log_errno(WLR_ERROR, "failed to exec Xwayland");
close(devnull);
_exit(EXIT_FAILURE);
}
static void server_finish_process(struct wlr_xwayland_server *server) {
if (!server || server->display == -1) {
return;
}
if (server->x_fd_read_event[0]) {
wl_event_source_remove(server->x_fd_read_event[0]);
wl_event_source_remove(server->x_fd_read_event[1]);
server->x_fd_read_event[0] = server->x_fd_read_event[1] = NULL;
}
if (server->client) {
wl_list_remove(&server->client_destroy.link);
wl_client_destroy(server->client);
}
if (server->sigusr1_source) {
wl_event_source_remove(server->sigusr1_source);
}
safe_close(server->wl_fd[0]);
safe_close(server->wl_fd[1]);
safe_close(server->wm_fd[0]);
safe_close(server->wm_fd[1]);
memset(server, 0, offsetof(struct wlr_xwayland_server, display));
server->wl_fd[0] = server->wl_fd[1] = -1;
server->wm_fd[0] = server->wm_fd[1] = -1;
/* We do not kill the Xwayland process, it dies to broken pipe
* after we close our side of the wm/wl fds. This is more reliable
* than trying to kill something that might no longer be Xwayland.
*/
}
static void server_finish_display(struct wlr_xwayland_server *server) {
if (!server || server->display == -1) {
return;
}
safe_close(server->x_fd[0]);
safe_close(server->x_fd[1]);
server->x_fd[0] = server->x_fd[1] = -1;
wl_list_remove(&server->display_destroy.link);
unlink_display_sockets(server->display);
server->display = -1;
server->display_name[0] = '\0';
}
static bool server_start(struct wlr_xwayland_server *server);
static bool server_start_lazy(struct wlr_xwayland_server *server);
static void handle_client_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwayland_server *server =
wl_container_of(listener, server, client_destroy);
if (server->sigusr1_source) {
// Xwayland failed to start, let the sigusr1 handler deal with it
return;
}
// Don't call client destroy: it's being destroyed already
server->client = NULL;
wl_list_remove(&server->client_destroy.link);
server_finish_process(server);
if (time(NULL) - server->server_start > 5) {
if (server->lazy) {
wlr_log(WLR_INFO, "Restarting Xwayland (lazy)");
server_start_lazy(server);
} else {
wlr_log(WLR_INFO, "Restarting Xwayland");
server_start(server);
}
}
}
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwayland_server *server =
wl_container_of(listener, server, display_destroy);
// Don't call client destroy: the display is being destroyed, it's too late
if (server->client) {
server->client = NULL;
wl_list_remove(&server->client_destroy.link);
}
wlr_xwayland_server_destroy(server);
}
static int xserver_handle_ready(int signal_number, void *data) {
struct wlr_xwayland_server *server = data;
int stat_val = -1;
while (waitpid(server->pid, &stat_val, 0) < 0) {
if (errno == EINTR) {
continue;
}
wlr_log_errno(WLR_ERROR, "waitpid for Xwayland fork failed");
goto error;
}
if (stat_val) {
wlr_log(WLR_ERROR, "Xwayland startup failed, not setting up xwm");
goto error;
}
wlr_log(WLR_DEBUG, "Xserver is ready");
wl_event_source_remove(server->sigusr1_source);
server->sigusr1_source = NULL;
struct wlr_xwayland_server_ready_event event = {
.server = server,
.wm_fd = server->wm_fd[0],
};
wlr_signal_emit_safe(&server->events.ready, &event);
/* ready is a one-shot signal, fire and forget */
wl_signal_init(&server->events.ready);
return 1; /* wayland event loop dispatcher's count */
error:
/* clean up */
server_finish_process(server);
server_finish_display(server);
return 1;
}
static bool server_start_display(struct wlr_xwayland_server *server,
struct wl_display *wl_display) {
server->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(wl_display, &server->display_destroy);
server->display = open_display_sockets(server->x_fd);
if (server->display < 0) {
server_finish_display(server);
return false;
}
snprintf(server->display_name, sizeof(server->display_name),
":%d", server->display);
return true;
}
static bool server_start(struct wlr_xwayland_server *server) {
if (socketpair(AF_UNIX, SOCK_STREAM, 0, server->wl_fd) != 0 ||
socketpair(AF_UNIX, SOCK_STREAM, 0, server->wm_fd) != 0) {
wlr_log_errno(WLR_ERROR, "socketpair failed");
server_finish_process(server);
return false;
}
if (!set_cloexec(server->wl_fd[0], true) ||
!set_cloexec(server->wl_fd[1], true) ||
!set_cloexec(server->wm_fd[0], true) ||
!set_cloexec(server->wm_fd[1], true)) {
server_finish_process(server);
return false;
}
server->server_start = time(NULL);
server->client = wl_client_create(server->wl_display, server->wl_fd[0]);
if (!server->client) {
wlr_log_errno(WLR_ERROR, "wl_client_create failed");
server_finish_process(server);
return false;
}
server->wl_fd[0] = -1; /* not ours anymore */
server->client_destroy.notify = handle_client_destroy;
wl_client_add_destroy_listener(server->client, &server->client_destroy);
struct wl_event_loop *loop = wl_display_get_event_loop(server->wl_display);
server->sigusr1_source = wl_event_loop_add_signal(loop, SIGUSR1,
xserver_handle_ready, server);
server->pid = fork();
if (server->pid < 0) {
wlr_log_errno(WLR_ERROR, "fork failed");
server_finish_process(server);
return false;
} else if (server->pid == 0) {
/* Double-fork, but we need to forward SIGUSR1 once Xserver(1)
* is ready, or error if there was one. */
pid_t ppid = getppid();
sigset_t sigset;
sigemptyset(&sigset);
sigaddset(&sigset, SIGUSR1);
sigaddset(&sigset, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigset, NULL);
pid_t pid = fork();
if (pid < 0) {
wlr_log_errno(WLR_ERROR, "second fork failed");
_exit(EXIT_FAILURE);
} else if (pid == 0) {
exec_xwayland(server);
}
int sig;
sigwait(&sigset, &sig);
kill(ppid, SIGUSR1);
wlr_log(WLR_DEBUG, "sent SIGUSR1 to process %d", ppid);
if (sig == SIGCHLD) {
waitpid(pid, NULL, 0);
_exit(EXIT_FAILURE);
}
_exit(EXIT_SUCCESS);
}
/* close child fds */
/* remain managing x sockets for lazy start */
close(server->wl_fd[1]);
close(server->wm_fd[1]);
server->wl_fd[1] = server->wm_fd[1] = -1;
return true;
}
static int xwayland_socket_connected(int fd, uint32_t mask, void *data) {
struct wlr_xwayland_server *server = data;
wl_event_source_remove(server->x_fd_read_event[0]);
wl_event_source_remove(server->x_fd_read_event[1]);
server->x_fd_read_event[0] = server->x_fd_read_event[1] = NULL;
server_start(server);
return 0;
}
static bool server_start_lazy(struct wlr_xwayland_server *server) {
struct wl_event_loop *loop = wl_display_get_event_loop(server->wl_display);
server->x_fd_read_event[0] = wl_event_loop_add_fd(loop, server->x_fd[0],
WL_EVENT_READABLE, xwayland_socket_connected, server);
server->x_fd_read_event[1] = wl_event_loop_add_fd(loop, server->x_fd[1],
WL_EVENT_READABLE, xwayland_socket_connected, server);
return true;
}
void wlr_xwayland_server_destroy(struct wlr_xwayland_server *server) {
if (!server) {
return;
}
server_finish_process(server);
server_finish_display(server);
wlr_signal_emit_safe(&server->events.destroy, NULL);
free(server);
}
struct wlr_xwayland_server *wlr_xwayland_server_create(
struct wl_display *wl_display, bool lazy) {
struct wlr_xwayland_server *server =
calloc(1, sizeof(struct wlr_xwayland_server));
if (!server) {
return NULL;
}
server->wl_display = wl_display;
server->lazy = lazy;
server->x_fd[0] = server->x_fd[1] = -1;
server->wl_fd[0] = server->wl_fd[1] = -1;
server->wm_fd[0] = server->wm_fd[1] = -1;
wl_signal_init(&server->events.ready);
wl_signal_init(&server->events.destroy);
if (!server_start_display(server, wl_display)) {
goto error_alloc;
}
if (server->lazy) {
if (!server_start_lazy(server)) {
goto error_display;
}
} else {
if (!server_start(server)) {
goto error_display;
}
}
return server;
error_display:
server_finish_display(server);
error_alloc:
free(server);
return NULL;
}

442
xwayland/xwayland.c
View file

@ -26,437 +26,103 @@ struct wlr_xwayland_cursor {
int32_t hotspot_y;
};
static void safe_close(int fd) {
if (fd >= 0) {
close(fd);
}
static void handle_server_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwayland *xwayland =
wl_container_of(listener, xwayland, server_destroy);
wlr_xwayland_destroy(xwayland);
}
static int fill_arg(char ***argv, const char *fmt, ...) {
int len;
char **cur_arg = *argv;
va_list args;
va_start(args, fmt);
len = vsnprintf(NULL, 0, fmt, args) + 1;
va_end(args);
while (*cur_arg) {
cur_arg++;
}
*cur_arg = malloc(len);
if (!*cur_arg) {
return -1;
}
*argv = cur_arg;
va_start(args, fmt);
len = vsnprintf(*cur_arg, len, fmt, args);
va_end(args);
return len;
}
static void handle_server_ready(struct wl_listener *listener, void *data) {
struct wlr_xwayland *xwayland =
wl_container_of(listener, xwayland, server_ready);
struct wlr_xwayland_server_ready_event *event = data;
_Noreturn static void exec_xwayland(struct wlr_xwayland *wlr_xwayland) {
if (!set_cloexec(wlr_xwayland->x_fd[0], false) ||
!set_cloexec(wlr_xwayland->x_fd[1], false) ||
!set_cloexec(wlr_xwayland->wm_fd[1], false) ||
!set_cloexec(wlr_xwayland->wl_fd[1], false)) {
_exit(EXIT_FAILURE);
}
/* Make Xwayland signal us when it's ready */
signal(SIGUSR1, SIG_IGN);
char *argv[] = {
"Xwayland", NULL /* display, e.g. :1 */,
"-rootless", "-terminate",
"-listen", NULL /* x_fd[0] */,
"-listen", NULL /* x_fd[1] */,
"-wm", NULL /* wm_fd[1] */,
NULL,
};
char **cur_arg = argv;
if (fill_arg(&cur_arg, ":%d", wlr_xwayland->display) < 0 ||
fill_arg(&cur_arg, "%d", wlr_xwayland->x_fd[0]) < 0 ||
fill_arg(&cur_arg, "%d", wlr_xwayland->x_fd[1]) < 0 ||
fill_arg(&cur_arg, "%d", wlr_xwayland->wm_fd[1]) < 0) {
wlr_log_errno(WLR_ERROR, "alloc/print failure");
_exit(EXIT_FAILURE);
}
char wayland_socket_str[16];
snprintf(wayland_socket_str, sizeof(wayland_socket_str), "%d", wlr_xwayland->wl_fd[1]);
setenv("WAYLAND_SOCKET", wayland_socket_str, true);
wlr_log(WLR_INFO, "WAYLAND_SOCKET=%d Xwayland :%d -rootless -terminate -listen %d -listen %d -wm %d",
wlr_xwayland->wl_fd[1], wlr_xwayland->display, wlr_xwayland->x_fd[0],
wlr_xwayland->x_fd[1], wlr_xwayland->wm_fd[1]);
// Closes stdout/stderr depending on log verbosity
enum wlr_log_importance verbosity = wlr_log_get_verbosity();
int devnull = open("/dev/null", O_WRONLY | O_CREAT | O_CLOEXEC, 0666);
if (devnull < 0) {
wlr_log_errno(WLR_ERROR, "XWayland: failed to open /dev/null");
_exit(EXIT_FAILURE);
}
if (verbosity < WLR_INFO) {
dup2(devnull, STDOUT_FILENO);
}
if (verbosity < WLR_ERROR) {
dup2(devnull, STDERR_FILENO);
}
// This returns if and only if the call fails
execvp("Xwayland", argv);
wlr_log_errno(WLR_ERROR, "failed to exec Xwayland");
close(devnull);
_exit(EXIT_FAILURE);
}
static void xwayland_finish_server(struct wlr_xwayland *wlr_xwayland) {
if (!wlr_xwayland || wlr_xwayland->display == -1) {
xwayland->xwm = xwm_create(xwayland, event->wm_fd);
if (!xwayland->xwm) {
return;
}
if (wlr_xwayland->x_fd_read_event[0]) {
wl_event_source_remove(wlr_xwayland->x_fd_read_event[0]);
wl_event_source_remove(wlr_xwayland->x_fd_read_event[1]);
wlr_xwayland->x_fd_read_event[0] = wlr_xwayland->x_fd_read_event[1] = NULL;
if (xwayland->seat) {
xwm_set_seat(xwayland->xwm, xwayland->seat);
}
if (wlr_xwayland->cursor != NULL) {
free(wlr_xwayland->cursor);
}
xwm_destroy(wlr_xwayland->xwm);
if (wlr_xwayland->client) {
wl_list_remove(&wlr_xwayland->client_destroy.link);
wl_client_destroy(wlr_xwayland->client);
}
if (wlr_xwayland->sigusr1_source) {
wl_event_source_remove(wlr_xwayland->sigusr1_source);
}
safe_close(wlr_xwayland->wl_fd[0]);
safe_close(wlr_xwayland->wl_fd[1]);
safe_close(wlr_xwayland->wm_fd[0]);
safe_close(wlr_xwayland->wm_fd[1]);
memset(wlr_xwayland, 0, offsetof(struct wlr_xwayland, display));
wlr_xwayland->wl_fd[0] = wlr_xwayland->wl_fd[1] = -1;
wlr_xwayland->wm_fd[0] = wlr_xwayland->wm_fd[1] = -1;
/* We do not kill the Xwayland process, it dies to broken pipe
* after we close our side of the wm/wl fds. This is more reliable
* than trying to kill something that might no longer be Xwayland.
*/
}
static void xwayland_finish_display(struct wlr_xwayland *wlr_xwayland) {
if (!wlr_xwayland || wlr_xwayland->display == -1) {
return;
}
safe_close(wlr_xwayland->x_fd[0]);
safe_close(wlr_xwayland->x_fd[1]);
wlr_xwayland->x_fd[0] = wlr_xwayland->x_fd[1] = -1;
wl_list_remove(&wlr_xwayland->display_destroy.link);
unlink_display_sockets(wlr_xwayland->display);
wlr_xwayland->display = -1;
wlr_xwayland->display_name[0] = '\0';
}
static bool xwayland_start_server(struct wlr_xwayland *wlr_xwayland);
static bool xwayland_start_server_lazy(struct wlr_xwayland *wlr_xwayland);
static void handle_client_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwayland *wlr_xwayland =
wl_container_of(listener, wlr_xwayland, client_destroy);
if (wlr_xwayland->sigusr1_source) {
// Xwayland failed to start, let the sigusr1 handler deal with it
return;
}
// Don't call client destroy: it's being destroyed already
wlr_xwayland->client = NULL;
wl_list_remove(&wlr_xwayland->client_destroy.link);
xwayland_finish_server(wlr_xwayland);
if (time(NULL) - wlr_xwayland->server_start > 5) {
if (wlr_xwayland->lazy) {
wlr_log(WLR_INFO, "Restarting Xwayland (lazy)");
xwayland_start_server_lazy(wlr_xwayland);
} else {
wlr_log(WLR_INFO, "Restarting Xwayland");
xwayland_start_server(wlr_xwayland);
}
}
}
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwayland *wlr_xwayland =
wl_container_of(listener, wlr_xwayland, display_destroy);
// Don't call client destroy: the display is being destroyed, it's too late
if (wlr_xwayland->client) {
wlr_xwayland->client = NULL;
wl_list_remove(&wlr_xwayland->client_destroy.link);
}
wlr_xwayland_destroy(wlr_xwayland);
}
static int xserver_handle_ready(int signal_number, void *data) {
struct wlr_xwayland *wlr_xwayland = data;
int stat_val = -1;
while (waitpid(wlr_xwayland->pid, &stat_val, 0) < 0) {
if (errno == EINTR) {
continue;
}
wlr_log_errno(WLR_ERROR, "waitpid for Xwayland fork failed");
goto error;
}
if (stat_val) {
wlr_log(WLR_ERROR, "Xwayland startup failed, not setting up xwm");
goto error;
}
wlr_log(WLR_DEBUG, "Xserver is ready");
wlr_xwayland->xwm = xwm_create(wlr_xwayland);
if (!wlr_xwayland->xwm) {
goto error;
}
if (wlr_xwayland->seat) {
xwm_set_seat(wlr_xwayland->xwm, wlr_xwayland->seat);
}
wl_event_source_remove(wlr_xwayland->sigusr1_source);
wlr_xwayland->sigusr1_source = NULL;
if (wlr_xwayland->cursor != NULL) {
struct wlr_xwayland_cursor *cur = wlr_xwayland->cursor;
xwm_set_cursor(wlr_xwayland->xwm, cur->pixels, cur->stride, cur->width,
if (xwayland->cursor != NULL) {
struct wlr_xwayland_cursor *cur = xwayland->cursor;
xwm_set_cursor(xwayland->xwm, cur->pixels, cur->stride, cur->width,
cur->height, cur->hotspot_x, cur->hotspot_y);
free(cur);
wlr_xwayland->cursor = NULL;
xwayland->cursor = NULL;
}
wlr_signal_emit_safe(&wlr_xwayland->events.ready, wlr_xwayland);
wlr_signal_emit_safe(&xwayland->events.ready, NULL);
/* ready is a one-shot signal, fire and forget */
wl_signal_init(&wlr_xwayland->events.ready);
return 1; /* wayland event loop dispatcher's count */
error:
/* clean up */
wlr_xwayland_set_seat(wlr_xwayland, NULL);
xwayland_finish_server(wlr_xwayland);
xwayland_finish_display(wlr_xwayland);
return 1;
wl_signal_init(&xwayland->events.ready);
}
static int xwayland_socket_connected(int fd, uint32_t mask, void* data){
struct wlr_xwayland *wlr_xwayland = data;
wl_event_source_remove(wlr_xwayland->x_fd_read_event[0]);
wl_event_source_remove(wlr_xwayland->x_fd_read_event[1]);
wlr_xwayland->x_fd_read_event[0] = wlr_xwayland->x_fd_read_event[1] = NULL;
xwayland_start_server(wlr_xwayland);
return 0;
}
static bool xwayland_start_display(struct wlr_xwayland *wlr_xwayland,
struct wl_display *wl_display) {
wlr_xwayland->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(wl_display, &wlr_xwayland->display_destroy);
wlr_xwayland->display = open_display_sockets(wlr_xwayland->x_fd);
if (wlr_xwayland->display < 0) {
xwayland_finish_display(wlr_xwayland);
return false;
}
snprintf(wlr_xwayland->display_name, sizeof(wlr_xwayland->display_name),
":%d", wlr_xwayland->display);
return true;
}
static bool xwayland_start_server(struct wlr_xwayland *wlr_xwayland) {
if (socketpair(AF_UNIX, SOCK_STREAM, 0, wlr_xwayland->wl_fd) != 0 ||
socketpair(AF_UNIX, SOCK_STREAM, 0, wlr_xwayland->wm_fd) != 0) {
wlr_log_errno(WLR_ERROR, "socketpair failed");
xwayland_finish_server(wlr_xwayland);
return false;
}
if (!set_cloexec(wlr_xwayland->wl_fd[0], true) ||
!set_cloexec(wlr_xwayland->wl_fd[1], true) ||
!set_cloexec(wlr_xwayland->wm_fd[0], true) ||
!set_cloexec(wlr_xwayland->wm_fd[1], true)) {
xwayland_finish_server(wlr_xwayland);
return false;
}
wlr_xwayland->server_start = time(NULL);
wlr_xwayland->client =
wl_client_create(wlr_xwayland->wl_display, wlr_xwayland->wl_fd[0]);
if (!wlr_xwayland->client) {
wlr_log_errno(WLR_ERROR, "wl_client_create failed");
xwayland_finish_server(wlr_xwayland);
return false;
}
wlr_xwayland->wl_fd[0] = -1; /* not ours anymore */
wlr_xwayland->client_destroy.notify = handle_client_destroy;
wl_client_add_destroy_listener(wlr_xwayland->client,
&wlr_xwayland->client_destroy);
struct wl_event_loop *loop = wl_display_get_event_loop(wlr_xwayland->wl_display);
wlr_xwayland->sigusr1_source = wl_event_loop_add_signal(loop, SIGUSR1,
xserver_handle_ready, wlr_xwayland);
wlr_xwayland->pid = fork();
if (wlr_xwayland->pid < 0) {
wlr_log_errno(WLR_ERROR, "fork failed");
xwayland_finish_server(wlr_xwayland);
return false;
} else if (wlr_xwayland->pid == 0) {
/* Double-fork, but we need to forward SIGUSR1 once Xserver(1)
* is ready, or error if there was one. */
pid_t ppid = getppid();
sigset_t sigset;
sigemptyset(&sigset);
sigaddset(&sigset, SIGUSR1);
sigaddset(&sigset, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigset, NULL);
pid_t pid = fork();
if (pid < 0) {
wlr_log_errno(WLR_ERROR, "second fork failed");
_exit(EXIT_FAILURE);
} else if (pid == 0) {
exec_xwayland(wlr_xwayland);
}
int sig;
sigwait(&sigset, &sig);
kill(ppid, SIGUSR1);
wlr_log(WLR_DEBUG, "sent SIGUSR1 to process %d", ppid);
if (sig == SIGCHLD) {
waitpid(pid, NULL, 0);
_exit(EXIT_FAILURE);
}
_exit(EXIT_SUCCESS);
}
/* close child fds */
/* remain managing x sockets for lazy start */
close(wlr_xwayland->wl_fd[1]);
close(wlr_xwayland->wm_fd[1]);
wlr_xwayland->wl_fd[1] = wlr_xwayland->wm_fd[1] = -1;
return true;
}
static bool xwayland_start_server_lazy(struct wlr_xwayland *wlr_xwayland) {
struct wl_event_loop *loop = wl_display_get_event_loop(wlr_xwayland->wl_display);
wlr_xwayland->x_fd_read_event[0] =
wl_event_loop_add_fd(loop, wlr_xwayland->x_fd[0], WL_EVENT_READABLE,
xwayland_socket_connected, wlr_xwayland);
wlr_xwayland->x_fd_read_event[1] =
wl_event_loop_add_fd(loop, wlr_xwayland->x_fd[1], WL_EVENT_READABLE,
xwayland_socket_connected, wlr_xwayland);
return true;
}
void wlr_xwayland_destroy(struct wlr_xwayland *wlr_xwayland) {
if (!wlr_xwayland) {
void wlr_xwayland_destroy(struct wlr_xwayland *xwayland) {
if (!xwayland) {
return;
}
wlr_xwayland_set_seat(wlr_xwayland, NULL);
xwayland_finish_server(wlr_xwayland);
xwayland_finish_display(wlr_xwayland);
free(wlr_xwayland);
wl_list_remove(&xwayland->server_destroy.link);
wl_list_remove(&xwayland->server_ready.link);
wlr_xwayland_set_seat(xwayland, NULL);
wlr_xwayland_server_destroy(xwayland->server);
free(xwayland);
}
struct wlr_xwayland *wlr_xwayland_create(struct wl_display *wl_display,
struct wlr_compositor *compositor, bool lazy) {
struct wlr_xwayland *wlr_xwayland = calloc(1, sizeof(struct wlr_xwayland));
if (!wlr_xwayland) {
struct wlr_xwayland *xwayland = calloc(1, sizeof(struct wlr_xwayland));
if (!xwayland) {
return NULL;
}
wlr_xwayland->wl_display = wl_display;
wlr_xwayland->compositor = compositor;
wlr_xwayland->lazy = lazy;
xwayland->wl_display = wl_display;
xwayland->compositor = compositor;
wlr_xwayland->x_fd[0] = wlr_xwayland->x_fd[1] = -1;
wlr_xwayland->wl_fd[0] = wlr_xwayland->wl_fd[1] = -1;
wlr_xwayland->wm_fd[0] = wlr_xwayland->wm_fd[1] = -1;
wl_signal_init(&xwayland->events.new_surface);
wl_signal_init(&xwayland->events.ready);
wl_signal_init(&wlr_xwayland->events.new_surface);
wl_signal_init(&wlr_xwayland->events.ready);
if (!xwayland_start_display(wlr_xwayland, wl_display)) {
goto error_alloc;
xwayland->server = wlr_xwayland_server_create(wl_display, lazy);
if (xwayland->server == NULL) {
free(xwayland->server);
return NULL;
}
if (wlr_xwayland->lazy) {
if (!xwayland_start_server_lazy(wlr_xwayland)) {
goto error_display;
}
} else {
if (!xwayland_start_server(wlr_xwayland)) {
goto error_display;
}
}
xwayland->display_name = xwayland->server->display_name;
return wlr_xwayland;
xwayland->server_destroy.notify = handle_server_destroy;
wl_signal_add(&xwayland->server->events.destroy, &xwayland->server_destroy);
error_display:
xwayland_finish_display(wlr_xwayland);
xwayland->server_ready.notify = handle_server_ready;
wl_signal_add(&xwayland->server->events.ready, &xwayland->server_ready);
error_alloc:
free(wlr_xwayland);
return NULL;
return xwayland;
}
void wlr_xwayland_set_cursor(struct wlr_xwayland *wlr_xwayland,
void wlr_xwayland_set_cursor(struct wlr_xwayland *xwayland,
uint8_t *pixels, uint32_t stride, uint32_t width, uint32_t height,
int32_t hotspot_x, int32_t hotspot_y) {
if (wlr_xwayland->xwm != NULL) {
xwm_set_cursor(wlr_xwayland->xwm, pixels, stride, width, height,
if (xwayland->xwm != NULL) {
xwm_set_cursor(xwayland->xwm, pixels, stride, width, height,
hotspot_x, hotspot_y);
return;
}
free(wlr_xwayland->cursor);
free(xwayland->cursor);
wlr_xwayland->cursor = calloc(1, sizeof(struct wlr_xwayland_cursor));
if (wlr_xwayland->cursor == NULL) {
xwayland->cursor = calloc(1, sizeof(struct wlr_xwayland_cursor));
if (xwayland->cursor == NULL) {
return;
}
wlr_xwayland->cursor->pixels = pixels;
wlr_xwayland->cursor->stride = stride;
wlr_xwayland->cursor->width = width;
wlr_xwayland->cursor->height = height;
wlr_xwayland->cursor->hotspot_x = hotspot_x;
wlr_xwayland->cursor->hotspot_y = hotspot_y;
xwayland->cursor->pixels = pixels;
xwayland->cursor->stride = stride;
xwayland->cursor->width = width;
xwayland->cursor->height = height;
xwayland->cursor->hotspot_x = hotspot_x;
xwayland->cursor->hotspot_y = hotspot_y;
}
static void xwayland_handle_seat_destroy(struct wl_listener *listener,

30
xwayland/xwm.c
View file

@ -985,7 +985,7 @@ static void xwm_handle_surface_id_message(struct wlr_xwm *xwm,
/* Check if we got notified after wayland surface create event */
uint32_t id = ev->data.data32[0];
struct wl_resource *resource =
wl_client_get_object(xwm->xwayland->client, id);
wl_client_get_object(xwm->xwayland->server->client, id);
if (resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
xsurface->surface_id = 0;
@ -1381,7 +1381,9 @@ static void handle_compositor_new_surface(struct wl_listener *listener,
struct wlr_xwm *xwm =
wl_container_of(listener, xwm, compositor_new_surface);
struct wlr_surface *surface = data;
if (wl_resource_get_client(surface->resource) != xwm->xwayland->client) {
struct wl_client *client = wl_resource_get_client(surface->resource);
if (client != xwm->xwayland->server->client) {
return;
}
@ -1695,23 +1697,22 @@ void xwm_set_cursor(struct wlr_xwm *xwm, const uint8_t *pixels, uint32_t stride,
xcb_flush(xwm->xcb_conn);
}
struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland) {
struct wlr_xwm *xwm_create(struct wlr_xwayland *xwayland, int wm_fd) {
struct wlr_xwm *xwm = calloc(1, sizeof(struct wlr_xwm));
if (xwm == NULL) {
return NULL;
}
xwm->xwayland = wlr_xwayland;
xwm->xwayland = xwayland;
wl_list_init(&xwm->surfaces);
wl_list_init(&xwm->unpaired_surfaces);
xwm->ping_timeout = 10000;
xwm->xcb_conn = xcb_connect_to_fd(wlr_xwayland->wm_fd[0], NULL);
xwm->xcb_conn = xcb_connect_to_fd(wm_fd, NULL);
int rc = xcb_connection_has_error(xwm->xcb_conn);
if (rc) {
wlr_log(WLR_ERROR, "xcb connect failed: %d", rc);
close(wlr_xwayland->wm_fd[0]);
free(xwm);
return NULL;
}
@ -1723,18 +1724,15 @@ struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland) {
return NULL;
}
#endif
xcb_screen_iterator_t screen_iterator =
xcb_setup_roots_iterator(xcb_get_setup(xwm->xcb_conn));
xwm->screen = screen_iterator.data;
struct wl_event_loop *event_loop = wl_display_get_event_loop(
wlr_xwayland->wl_display);
xwm->event_source =
wl_event_loop_add_fd(event_loop,
wlr_xwayland->wm_fd[0],
WL_EVENT_READABLE,
x11_event_handler,
xwm);
struct wl_event_loop *event_loop =
wl_display_get_event_loop(xwayland->wl_display);
xwm->event_source = wl_event_loop_add_fd(event_loop, wm_fd,
WL_EVENT_READABLE, x11_event_handler, xwm);
wl_event_source_check(xwm->event_source);
xwm_get_resources(xwm);
@ -1781,10 +1779,10 @@ struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland) {
xwm_selection_init(xwm);
xwm->compositor_new_surface.notify = handle_compositor_new_surface;
wl_signal_add(&wlr_xwayland->compositor->events.new_surface,
wl_signal_add(&xwayland->compositor->events.new_surface,
&xwm->compositor_new_surface);
xwm->compositor_destroy.notify = handle_compositor_destroy;
wl_signal_add(&wlr_xwayland->compositor->events.destroy,
wl_signal_add(&xwayland->compositor->events.destroy,
&xwm->compositor_destroy);
xwm_create_wm_window(xwm);