2012-05-22 00:48:05 +04:00
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/*
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* Copyright © 2011 Intel Corporation
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*
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2015-06-12 02:22:34 +03:00
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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2012-05-22 00:48:05 +04:00
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*
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2015-06-12 02:22:34 +03:00
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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2012-05-22 00:48:05 +04:00
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*/
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2013-05-22 19:03:19 +04:00
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#include "config.h"
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2012-05-22 00:48:05 +04:00
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#include <stdlib.h>
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2016-07-19 14:16:27 +03:00
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#include <stdint.h>
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2012-05-22 00:48:05 +04:00
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#include <stdio.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <signal.h>
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#include "xwayland.h"
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2019-04-04 15:52:47 +03:00
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#include <libweston/xwayland-api.h>
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2015-06-16 01:37:10 +03:00
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#include "shared/helpers.h"
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2016-08-04 03:40:52 +03:00
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#include "shared/string-helpers.h"
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2012-05-22 00:48:05 +04:00
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static int
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weston_xserver_handle_event(int listen_fd, uint32_t mask, void *data)
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{
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2012-11-30 23:19:56 +04:00
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struct weston_xserver *wxs = data;
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2016-06-29 12:54:27 +03:00
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char display[8];
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snprintf(display, sizeof display, ":%d", wxs->display);
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2014-03-18 09:33:29 +04:00
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2016-06-29 12:54:27 +03:00
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wxs->pid = wxs->spawn_func(wxs->user_data, display, wxs->abstract_fd, wxs->unix_fd);
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if (wxs->pid == -1) {
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weston_log("Failed to spawn the Xwayland server\n");
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2012-05-22 00:48:05 +04:00
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return 1;
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}
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2016-06-29 12:54:27 +03:00
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weston_log("Spawned Xwayland server, pid %d\n", wxs->pid);
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wl_event_source_remove(wxs->abstract_source);
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wl_event_source_remove(wxs->unix_source);
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2012-05-22 00:48:05 +04:00
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return 1;
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}
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static void
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weston_xserver_shutdown(struct weston_xserver *wxs)
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{
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char path[256];
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snprintf(path, sizeof path, "/tmp/.X%d-lock", wxs->display);
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unlink(path);
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snprintf(path, sizeof path, "/tmp/.X11-unix/X%d", wxs->display);
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unlink(path);
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2016-06-29 12:54:27 +03:00
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if (wxs->pid == 0) {
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2012-05-22 00:48:05 +04:00
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wl_event_source_remove(wxs->abstract_source);
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wl_event_source_remove(wxs->unix_source);
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}
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close(wxs->abstract_fd);
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close(wxs->unix_fd);
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2014-06-19 12:03:31 +04:00
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if (wxs->wm) {
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2012-05-22 00:48:05 +04:00
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weston_wm_destroy(wxs->wm);
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2014-06-19 12:03:31 +04:00
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wxs->wm = NULL;
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}
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2012-05-22 00:48:05 +04:00
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wxs->loop = NULL;
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}
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static int
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bind_to_abstract_socket(int display)
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{
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struct sockaddr_un addr;
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socklen_t size, name_size;
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int fd;
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fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
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if (fd < 0)
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return -1;
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addr.sun_family = AF_LOCAL;
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name_size = snprintf(addr.sun_path, sizeof addr.sun_path,
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"%c/tmp/.X11-unix/X%d", 0, display);
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size = offsetof(struct sockaddr_un, sun_path) + name_size;
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if (bind(fd, (struct sockaddr *) &addr, size) < 0) {
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2019-04-27 00:57:31 +03:00
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weston_log("failed to bind to @%s: %s\n", addr.sun_path + 1,
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strerror(errno));
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2012-05-22 00:48:05 +04:00
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close(fd);
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return -1;
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}
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if (listen(fd, 1) < 0) {
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close(fd);
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return -1;
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}
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return fd;
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}
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static int
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bind_to_unix_socket(int display)
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{
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struct sockaddr_un addr;
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socklen_t size, name_size;
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int fd;
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fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
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if (fd < 0)
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return -1;
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addr.sun_family = AF_LOCAL;
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name_size = snprintf(addr.sun_path, sizeof addr.sun_path,
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"/tmp/.X11-unix/X%d", display) + 1;
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size = offsetof(struct sockaddr_un, sun_path) + name_size;
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unlink(addr.sun_path);
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if (bind(fd, (struct sockaddr *) &addr, size) < 0) {
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2019-04-27 00:57:31 +03:00
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weston_log("failed to bind to %s: %s\n", addr.sun_path,
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strerror(errno));
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2012-05-22 00:48:05 +04:00
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close(fd);
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return -1;
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}
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if (listen(fd, 1) < 0) {
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unlink(addr.sun_path);
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close(fd);
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return -1;
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}
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return fd;
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}
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static int
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create_lockfile(int display, char *lockfile, size_t lsize)
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{
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2016-11-16 19:37:05 +03:00
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/* 10 decimal characters, trailing LF and NUL byte; see comment
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* at end of function. */
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char pid[11];
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2012-05-22 00:48:05 +04:00
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int fd, size;
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pid_t other;
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snprintf(lockfile, lsize, "/tmp/.X%d-lock", display);
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fd = open(lockfile, O_WRONLY | O_CLOEXEC | O_CREAT | O_EXCL, 0444);
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if (fd < 0 && errno == EEXIST) {
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2014-02-02 08:44:54 +04:00
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fd = open(lockfile, O_CLOEXEC | O_RDONLY);
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2012-05-22 00:48:05 +04:00
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if (fd < 0 || read(fd, pid, 11) != 11) {
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2012-06-07 20:01:59 +04:00
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weston_log("can't read lock file %s: %s\n",
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2012-05-22 00:48:05 +04:00
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lockfile, strerror(errno));
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2012-12-05 22:47:07 +04:00
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if (fd >= 0)
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close (fd);
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2012-05-22 00:48:05 +04:00
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errno = EEXIST;
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return -1;
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}
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2016-11-16 19:37:05 +03:00
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/* Trim the trailing LF, or at least ensure it's NULL. */
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2016-11-14 16:05:28 +03:00
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pid[10] = '\0';
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2016-08-04 03:40:52 +03:00
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if (!safe_strtoint(pid, &other)) {
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2012-06-07 20:01:59 +04:00
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weston_log("can't parse lock file %s\n",
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2012-05-22 00:48:05 +04:00
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lockfile);
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close(fd);
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errno = EEXIST;
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return -1;
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}
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if (kill(other, 0) < 0 && errno == ESRCH) {
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/* stale lock file; unlink and try again */
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2012-06-07 20:01:59 +04:00
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weston_log("unlinking stale lock file %s\n", lockfile);
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2012-05-22 00:48:05 +04:00
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close(fd);
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if (unlink(lockfile))
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/* If we fail to unlink, return EEXIST
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so we try the next display number.*/
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errno = EEXIST;
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else
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errno = EAGAIN;
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return -1;
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}
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|
2012-07-08 05:03:45 +04:00
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close(fd);
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2012-05-22 00:48:05 +04:00
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errno = EEXIST;
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return -1;
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} else if (fd < 0) {
|
2012-06-07 20:01:59 +04:00
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weston_log("failed to create lock file %s: %s\n",
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2012-05-22 00:48:05 +04:00
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lockfile, strerror(errno));
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return -1;
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}
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|
2016-11-16 19:37:05 +03:00
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/* Subtle detail: we use the pid of the wayland compositor, not the
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* xserver in the lock file.
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* Also subtle is that we don't emit a trailing NUL to the file, so
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* our size here is 11 rather than 12. */
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size = dprintf(fd, "%10d\n", getpid());
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if (size != 11) {
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2012-05-22 00:48:05 +04:00
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unlink(lockfile);
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close(fd);
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return -1;
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}
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close(fd);
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return 0;
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}
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static void
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weston_xserver_destroy(struct wl_listener *l, void *data)
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{
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struct weston_xserver *wxs =
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container_of(l, struct weston_xserver, destroy_listener);
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if (!wxs)
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return;
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if (wxs->loop)
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weston_xserver_shutdown(wxs);
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|
2019-04-17 13:47:06 +03:00
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weston_compositor_log_scope_destroy(wxs->wm_debug);
|
2017-10-12 14:18:14 +03:00
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|
2012-05-22 00:48:05 +04:00
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free(wxs);
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}
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|
2016-06-29 12:54:27 +03:00
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static struct weston_xwayland *
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weston_xwayland_get(struct weston_compositor *compositor)
|
2012-05-22 00:48:05 +04:00
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{
|
2016-06-29 12:54:27 +03:00
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struct wl_listener *listener;
|
2012-11-30 23:19:56 +04:00
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struct weston_xserver *wxs;
|
2012-05-22 00:48:05 +04:00
|
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|
2016-06-29 12:54:27 +03:00
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listener = wl_signal_get(&compositor->destroy_signal,
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weston_xserver_destroy);
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|
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if (!listener)
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return NULL;
|
2012-05-22 00:48:05 +04:00
|
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|
2016-06-29 12:54:27 +03:00
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wxs = wl_container_of(listener, wxs, destroy_listener);
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return (struct weston_xwayland *)wxs;
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}
|
2012-05-22 00:48:05 +04:00
|
|
|
|
2016-06-29 12:54:27 +03:00
|
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static int
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|
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weston_xwayland_listen(struct weston_xwayland *xwayland, void *user_data,
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|
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weston_xwayland_spawn_xserver_func_t spawn_func)
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|
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{
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struct weston_xserver *wxs = (struct weston_xserver *)xwayland;
|
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|
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char lockfile[256], display_name[8];
|
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|
|
|
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wxs->user_data = user_data;
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|
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wxs->spawn_func = spawn_func;
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|
|
|
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retry:
|
2012-11-30 23:19:56 +04:00
|
|
|
if (create_lockfile(wxs->display, lockfile, sizeof lockfile) < 0) {
|
2012-05-22 00:48:05 +04:00
|
|
|
if (errno == EAGAIN) {
|
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|
goto retry;
|
|
|
|
} else if (errno == EEXIST) {
|
2012-11-30 23:19:56 +04:00
|
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|
wxs->display++;
|
2012-05-22 00:48:05 +04:00
|
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|
goto retry;
|
|
|
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} else {
|
2012-11-30 23:19:56 +04:00
|
|
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free(wxs);
|
2012-05-22 00:48:05 +04:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-30 23:19:56 +04:00
|
|
|
wxs->abstract_fd = bind_to_abstract_socket(wxs->display);
|
|
|
|
if (wxs->abstract_fd < 0 && errno == EADDRINUSE) {
|
|
|
|
wxs->display++;
|
2012-05-22 00:48:05 +04:00
|
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|
unlink(lockfile);
|
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|
|
goto retry;
|
|
|
|
}
|
|
|
|
|
2012-11-30 23:19:56 +04:00
|
|
|
wxs->unix_fd = bind_to_unix_socket(wxs->display);
|
|
|
|
if (wxs->unix_fd < 0) {
|
2012-05-22 00:48:05 +04:00
|
|
|
unlink(lockfile);
|
2012-11-30 23:19:56 +04:00
|
|
|
close(wxs->abstract_fd);
|
|
|
|
free(wxs);
|
2012-05-22 00:48:05 +04:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2012-11-30 23:19:56 +04:00
|
|
|
snprintf(display_name, sizeof display_name, ":%d", wxs->display);
|
2012-06-07 20:01:59 +04:00
|
|
|
weston_log("xserver listening on display %s\n", display_name);
|
2012-05-22 00:48:05 +04:00
|
|
|
setenv("DISPLAY", display_name, 1);
|
|
|
|
|
2016-06-29 12:54:27 +03:00
|
|
|
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;
|
|
|
|
|
2012-11-30 23:19:56 +04:00
|
|
|
wxs->abstract_source =
|
|
|
|
wl_event_loop_add_fd(wxs->loop, wxs->abstract_fd,
|
2012-05-22 00:48:05 +04:00
|
|
|
WL_EVENT_READABLE,
|
2012-11-30 23:19:56 +04:00
|
|
|
weston_xserver_handle_event, wxs);
|
|
|
|
wxs->unix_source =
|
|
|
|
wl_event_loop_add_fd(wxs->loop, wxs->unix_fd,
|
2012-05-22 00:48:05 +04:00
|
|
|
WL_EVENT_READABLE,
|
2012-11-30 23:19:56 +04:00
|
|
|
weston_xserver_handle_event, wxs);
|
2012-05-22 00:48:05 +04:00
|
|
|
|
2016-06-29 12:54:27 +03:00
|
|
|
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,
|
|
|
|
};
|
2016-08-12 11:41:35 +03:00
|
|
|
extern const struct weston_xwayland_surface_api surface_api;
|
2016-06-29 12:54:27 +03:00
|
|
|
|
|
|
|
WL_EXPORT int
|
2016-12-02 16:20:35 +03:00
|
|
|
weston_module_init(struct weston_compositor *compositor)
|
2016-06-29 12:54:27 +03:00
|
|
|
|
|
|
|
{
|
|
|
|
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;
|
|
|
|
|
2016-08-12 11:41:35 +03:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2016-06-29 12:54:27 +03:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2016-08-12 11:41:35 +03:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2012-11-30 23:19:56 +04:00
|
|
|
wxs->destroy_listener.notify = weston_xserver_destroy;
|
|
|
|
wl_signal_add(&compositor->destroy_signal, &wxs->destroy_listener);
|
2012-05-22 00:48:05 +04:00
|
|
|
|
2019-04-07 19:07:16 +03:00
|
|
|
wxs->wm_debug =
|
2019-04-17 13:47:06 +03:00
|
|
|
weston_compositor_add_log_scope(wxs->compositor->weston_log_ctx,
|
|
|
|
"xwm-wm-x11",
|
|
|
|
"XWM's window management X11 events\n",
|
2019-07-29 12:02:47 +03:00
|
|
|
NULL, NULL, NULL);
|
2017-10-12 14:18:14 +03:00
|
|
|
|
2012-05-22 00:48:05 +04:00
|
|
|
return 0;
|
|
|
|
}
|