mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-09-06 18:05:39 +00:00
![Marius Vlad](/assets/img/avatar_default.png)
Rename also the functions which work on weston_log_scope. Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
405 lines
9.9 KiB
C
405 lines
9.9 KiB
C
/*
|
|
* Copyright © 2011 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial
|
|
* portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
|
|
#include "xwayland.h"
|
|
#include <libweston/xwayland-api.h>
|
|
#include "shared/helpers.h"
|
|
#include "shared/string-helpers.h"
|
|
|
|
static int
|
|
weston_xserver_handle_event(int listen_fd, uint32_t mask, void *data)
|
|
{
|
|
struct weston_xserver *wxs = data;
|
|
char display[8];
|
|
|
|
snprintf(display, sizeof display, ":%d", wxs->display);
|
|
|
|
wxs->pid = wxs->spawn_func(wxs->user_data, display, wxs->abstract_fd, wxs->unix_fd);
|
|
if (wxs->pid == -1) {
|
|
weston_log("Failed to spawn the Xwayland server\n");
|
|
return 1;
|
|
}
|
|
|
|
weston_log("Spawned Xwayland server, pid %d\n", wxs->pid);
|
|
wl_event_source_remove(wxs->abstract_source);
|
|
wl_event_source_remove(wxs->unix_source);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
weston_xserver_shutdown(struct weston_xserver *wxs)
|
|
{
|
|
char path[256];
|
|
|
|
snprintf(path, sizeof path, "/tmp/.X%d-lock", wxs->display);
|
|
unlink(path);
|
|
snprintf(path, sizeof path, "/tmp/.X11-unix/X%d", wxs->display);
|
|
unlink(path);
|
|
if (wxs->pid == 0) {
|
|
wl_event_source_remove(wxs->abstract_source);
|
|
wl_event_source_remove(wxs->unix_source);
|
|
}
|
|
close(wxs->abstract_fd);
|
|
close(wxs->unix_fd);
|
|
if (wxs->wm) {
|
|
weston_wm_destroy(wxs->wm);
|
|
wxs->wm = NULL;
|
|
}
|
|
wxs->loop = NULL;
|
|
}
|
|
|
|
static int
|
|
bind_to_abstract_socket(int display)
|
|
{
|
|
struct sockaddr_un addr;
|
|
socklen_t size, name_size;
|
|
int fd;
|
|
|
|
fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
addr.sun_family = AF_LOCAL;
|
|
name_size = snprintf(addr.sun_path, sizeof addr.sun_path,
|
|
"%c/tmp/.X11-unix/X%d", 0, display);
|
|
size = offsetof(struct sockaddr_un, sun_path) + name_size;
|
|
if (bind(fd, (struct sockaddr *) &addr, size) < 0) {
|
|
weston_log("failed to bind to @%s: %s\n", addr.sun_path + 1,
|
|
strerror(errno));
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
if (listen(fd, 1) < 0) {
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int
|
|
bind_to_unix_socket(int display)
|
|
{
|
|
struct sockaddr_un addr;
|
|
socklen_t size, name_size;
|
|
int fd;
|
|
|
|
fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
addr.sun_family = AF_LOCAL;
|
|
name_size = snprintf(addr.sun_path, sizeof addr.sun_path,
|
|
"/tmp/.X11-unix/X%d", display) + 1;
|
|
size = offsetof(struct sockaddr_un, sun_path) + name_size;
|
|
unlink(addr.sun_path);
|
|
if (bind(fd, (struct sockaddr *) &addr, size) < 0) {
|
|
weston_log("failed to bind to %s: %s\n", addr.sun_path,
|
|
strerror(errno));
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
if (listen(fd, 1) < 0) {
|
|
unlink(addr.sun_path);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int
|
|
create_lockfile(int display, char *lockfile, size_t lsize)
|
|
{
|
|
/* 10 decimal characters, trailing LF and NUL byte; see comment
|
|
* at end of function. */
|
|
char pid[11];
|
|
int fd, size;
|
|
pid_t other;
|
|
|
|
snprintf(lockfile, lsize, "/tmp/.X%d-lock", display);
|
|
fd = open(lockfile, O_WRONLY | O_CLOEXEC | O_CREAT | O_EXCL, 0444);
|
|
if (fd < 0 && errno == EEXIST) {
|
|
fd = open(lockfile, O_CLOEXEC | O_RDONLY);
|
|
if (fd < 0 || read(fd, pid, 11) != 11) {
|
|
weston_log("can't read lock file %s: %s\n",
|
|
lockfile, strerror(errno));
|
|
if (fd >= 0)
|
|
close (fd);
|
|
|
|
errno = EEXIST;
|
|
return -1;
|
|
}
|
|
|
|
/* Trim the trailing LF, or at least ensure it's NULL. */
|
|
pid[10] = '\0';
|
|
|
|
if (!safe_strtoint(pid, &other)) {
|
|
weston_log("can't parse lock file %s\n",
|
|
lockfile);
|
|
close(fd);
|
|
errno = EEXIST;
|
|
return -1;
|
|
}
|
|
|
|
if (kill(other, 0) < 0 && errno == ESRCH) {
|
|
/* stale lock file; unlink and try again */
|
|
weston_log("unlinking stale lock file %s\n", lockfile);
|
|
close(fd);
|
|
if (unlink(lockfile))
|
|
/* If we fail to unlink, return EEXIST
|
|
so we try the next display number.*/
|
|
errno = EEXIST;
|
|
else
|
|
errno = EAGAIN;
|
|
return -1;
|
|
}
|
|
|
|
close(fd);
|
|
errno = EEXIST;
|
|
return -1;
|
|
} else if (fd < 0) {
|
|
weston_log("failed to create lock file %s: %s\n",
|
|
lockfile, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
/* Subtle detail: we use the pid of the wayland compositor, not the
|
|
* xserver in the lock file.
|
|
* Also subtle is that we don't emit a trailing NUL to the file, so
|
|
* our size here is 11 rather than 12. */
|
|
size = dprintf(fd, "%10d\n", getpid());
|
|
if (size != 11) {
|
|
unlink(lockfile);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
weston_xserver_destroy(struct wl_listener *l, void *data)
|
|
{
|
|
struct weston_xserver *wxs =
|
|
container_of(l, struct weston_xserver, destroy_listener);
|
|
|
|
if (!wxs)
|
|
return;
|
|
|
|
if (wxs->loop)
|
|
weston_xserver_shutdown(wxs);
|
|
|
|
weston_compositor_log_scope_destroy(wxs->wm_debug);
|
|
|
|
free(wxs);
|
|
}
|
|
|
|
static struct weston_xwayland *
|
|
weston_xwayland_get(struct weston_compositor *compositor)
|
|
{
|
|
struct wl_listener *listener;
|
|
struct weston_xserver *wxs;
|
|
|
|
listener = wl_signal_get(&compositor->destroy_signal,
|
|
weston_xserver_destroy);
|
|
if (!listener)
|
|
return NULL;
|
|
|
|
wxs = wl_container_of(listener, wxs, destroy_listener);
|
|
return (struct weston_xwayland *)wxs;
|
|
}
|
|
|
|
static int
|
|
weston_xwayland_listen(struct weston_xwayland *xwayland, void *user_data,
|
|
weston_xwayland_spawn_xserver_func_t spawn_func)
|
|
{
|
|
struct weston_xserver *wxs = (struct weston_xserver *)xwayland;
|
|
char lockfile[256], display_name[8];
|
|
|
|
wxs->user_data = user_data;
|
|
wxs->spawn_func = spawn_func;
|
|
|
|
retry:
|
|
if (create_lockfile(wxs->display, lockfile, sizeof lockfile) < 0) {
|
|
if (errno == EAGAIN) {
|
|
goto retry;
|
|
} else if (errno == EEXIST) {
|
|
wxs->display++;
|
|
goto retry;
|
|
} else {
|
|
free(wxs);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
wxs->abstract_fd = bind_to_abstract_socket(wxs->display);
|
|
if (wxs->abstract_fd < 0 && errno == EADDRINUSE) {
|
|
wxs->display++;
|
|
unlink(lockfile);
|
|
goto retry;
|
|
}
|
|
|
|
wxs->unix_fd = bind_to_unix_socket(wxs->display);
|
|
if (wxs->unix_fd < 0) {
|
|
unlink(lockfile);
|
|
close(wxs->abstract_fd);
|
|
free(wxs);
|
|
return -1;
|
|
}
|
|
|
|
snprintf(display_name, sizeof display_name, ":%d", wxs->display);
|
|
weston_log("xserver listening on display %s\n", display_name);
|
|
setenv("DISPLAY", display_name, 1);
|
|
|
|
wxs->loop = wl_display_get_event_loop(wxs->wl_display);
|
|
wxs->abstract_source =
|
|
wl_event_loop_add_fd(wxs->loop, wxs->abstract_fd,
|
|
WL_EVENT_READABLE,
|
|
weston_xserver_handle_event, wxs);
|
|
wxs->unix_source =
|
|
wl_event_loop_add_fd(wxs->loop, wxs->unix_fd,
|
|
WL_EVENT_READABLE,
|
|
weston_xserver_handle_event, wxs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
weston_xwayland_xserver_loaded(struct weston_xwayland *xwayland,
|
|
struct wl_client *client, int wm_fd)
|
|
{
|
|
struct weston_xserver *wxs = (struct weston_xserver *)xwayland;
|
|
wxs->wm = weston_wm_create(wxs, wm_fd);
|
|
wxs->client = client;
|
|
}
|
|
|
|
static void
|
|
weston_xwayland_xserver_exited(struct weston_xwayland *xwayland,
|
|
int exit_status)
|
|
{
|
|
struct weston_xserver *wxs = (struct weston_xserver *)xwayland;
|
|
|
|
wxs->pid = 0;
|
|
wxs->client = NULL;
|
|
|
|
wxs->abstract_source =
|
|
wl_event_loop_add_fd(wxs->loop, wxs->abstract_fd,
|
|
WL_EVENT_READABLE,
|
|
weston_xserver_handle_event, wxs);
|
|
wxs->unix_source =
|
|
wl_event_loop_add_fd(wxs->loop, wxs->unix_fd,
|
|
WL_EVENT_READABLE,
|
|
weston_xserver_handle_event, wxs);
|
|
|
|
if (wxs->wm) {
|
|
weston_log("xserver exited, code %d\n", exit_status);
|
|
weston_wm_destroy(wxs->wm);
|
|
wxs->wm = NULL;
|
|
} else {
|
|
/* If the X server crashes before it binds to the
|
|
* xserver interface, shut down and don't try
|
|
* again. */
|
|
weston_log("xserver crashing too fast: %d\n", exit_status);
|
|
weston_xserver_shutdown(wxs);
|
|
}
|
|
}
|
|
|
|
const struct weston_xwayland_api api = {
|
|
weston_xwayland_get,
|
|
weston_xwayland_listen,
|
|
weston_xwayland_xserver_loaded,
|
|
weston_xwayland_xserver_exited,
|
|
};
|
|
extern const struct weston_xwayland_surface_api surface_api;
|
|
|
|
WL_EXPORT int
|
|
weston_module_init(struct weston_compositor *compositor)
|
|
|
|
{
|
|
struct wl_display *display = compositor->wl_display;
|
|
struct weston_xserver *wxs;
|
|
int ret;
|
|
|
|
wxs = zalloc(sizeof *wxs);
|
|
if (wxs == NULL)
|
|
return -1;
|
|
wxs->wl_display = display;
|
|
wxs->compositor = compositor;
|
|
|
|
if (weston_xwayland_get_api(compositor) != NULL ||
|
|
weston_xwayland_surface_get_api(compositor) != NULL) {
|
|
weston_log("The xwayland module APIs are already loaded.\n");
|
|
free(wxs);
|
|
return -1;
|
|
}
|
|
|
|
ret = weston_plugin_api_register(compositor, WESTON_XWAYLAND_API_NAME,
|
|
&api, sizeof(api));
|
|
if (ret < 0) {
|
|
weston_log("Failed to register the xwayland module API.\n");
|
|
free(wxs);
|
|
return -1;
|
|
}
|
|
|
|
ret = weston_plugin_api_register(compositor,
|
|
WESTON_XWAYLAND_SURFACE_API_NAME,
|
|
&surface_api, sizeof(surface_api));
|
|
if (ret < 0) {
|
|
weston_log("Failed to register the xwayland surface API.\n");
|
|
free(wxs);
|
|
return -1;
|
|
}
|
|
|
|
wxs->destroy_listener.notify = weston_xserver_destroy;
|
|
wl_signal_add(&compositor->destroy_signal, &wxs->destroy_listener);
|
|
|
|
wxs->wm_debug =
|
|
weston_compositor_add_log_scope(wxs->compositor->weston_log_ctx,
|
|
"xwm-wm-x11",
|
|
"XWM's window management X11 events\n",
|
|
NULL, NULL);
|
|
|
|
return 0;
|
|
}
|