mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-09-06 18:05:39 +00:00
![Bryce Harrington](/assets/img/avatar_default.png)
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com> Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
210 lines
5.7 KiB
C
210 lines
5.7 KiB
C
/*
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* Copyright © 2011 Intel Corporation
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* Copyright © 2016 Giulio Camuffo
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*
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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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*
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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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*/
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#include "config.h"
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#include <signal.h>
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#include <sys/socket.h>
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#include "compositor.h"
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#include "compositor/weston.h"
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#include "xwayland/xwayland-api.h"
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#include "shared/helpers.h"
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struct wet_xwayland {
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struct weston_compositor *compositor;
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const struct weston_xwayland_api *api;
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struct weston_xwayland *xwayland;
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struct wl_event_source *sigusr1_source;
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struct wl_client *client;
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int wm_fd;
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struct weston_process process;
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};
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static int
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handle_sigusr1(int signal_number, void *data)
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{
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struct wet_xwayland *wxw = data;
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/* We'd be safer if we actually had the struct
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* signalfd_siginfo from the signalfd data and could verify
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* this came from Xwayland.*/
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wxw->api->xserver_loaded(wxw->xwayland, wxw->client, wxw->wm_fd);
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wl_event_source_remove(wxw->sigusr1_source);
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return 1;
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}
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static pid_t
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spawn_xserver(void *user_data, const char *display, int abstract_fd, int unix_fd)
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{
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struct wet_xwayland *wxw = user_data;
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pid_t pid;
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char s[8], abstract_fd_str[8], unix_fd_str[8], wm_fd_str[8];
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int sv[2], wm[2], fd;
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char *xserver = NULL;
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struct weston_config *config = wet_get_config(wxw->compositor);
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struct weston_config_section *section;
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if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) < 0) {
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weston_log("wl connection socketpair failed\n");
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return 1;
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}
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if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, wm) < 0) {
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weston_log("X wm connection socketpair failed\n");
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return 1;
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}
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pid = fork();
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switch (pid) {
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case 0:
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/* SOCK_CLOEXEC closes both ends, so we need to unset
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* the flag on the client fd. */
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fd = dup(sv[1]);
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if (fd < 0)
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goto fail;
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snprintf(s, sizeof s, "%d", fd);
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setenv("WAYLAND_SOCKET", s, 1);
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fd = dup(abstract_fd);
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if (fd < 0)
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goto fail;
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snprintf(abstract_fd_str, sizeof abstract_fd_str, "%d", fd);
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fd = dup(unix_fd);
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if (fd < 0)
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goto fail;
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snprintf(unix_fd_str, sizeof unix_fd_str, "%d", fd);
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fd = dup(wm[1]);
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if (fd < 0)
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goto fail;
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snprintf(wm_fd_str, sizeof wm_fd_str, "%d", fd);
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section = weston_config_get_section(config,
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"xwayland", NULL, NULL);
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weston_config_section_get_string(section, "path",
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&xserver, XSERVER_PATH);
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/* Ignore SIGUSR1 in the child, which will make the X
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* server send SIGUSR1 to the parent (weston) when
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* it's done with initialization. During
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* initialization the X server will round trip and
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* block on the wayland compositor, so avoid making
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* blocking requests (like xcb_connect_to_fd) until
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* it's done with that. */
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signal(SIGUSR1, SIG_IGN);
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if (execl(xserver,
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xserver,
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display,
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"-rootless",
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"-listen", abstract_fd_str,
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"-listen", unix_fd_str,
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"-wm", wm_fd_str,
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"-terminate",
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NULL) < 0)
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weston_log("exec of '%s %s -rootless "
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"-listen %s -listen %s -wm %s "
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"-terminate' failed: %m\n",
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xserver, display,
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abstract_fd_str, unix_fd_str, wm_fd_str);
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fail:
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_exit(EXIT_FAILURE);
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default:
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close(sv[1]);
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wxw->client = wl_client_create(wxw->compositor->wl_display, sv[0]);
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close(wm[1]);
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wxw->wm_fd = wm[0];
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wxw->process.pid = pid;
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weston_watch_process(&wxw->process);
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break;
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case -1:
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weston_log("Failed to fork to spawn xserver process\n");
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break;
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}
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return pid;
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}
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static void
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xserver_cleanup(struct weston_process *process, int status)
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{
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struct wet_xwayland *wxw =
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container_of(process, struct wet_xwayland, process);
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struct wl_event_loop *loop =
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wl_display_get_event_loop(wxw->compositor->wl_display);
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wxw->api->xserver_exited(wxw->xwayland, status);
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wxw->sigusr1_source = wl_event_loop_add_signal(loop, SIGUSR1,
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handle_sigusr1, wxw);
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wxw->client = NULL;
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}
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int
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wet_load_xwayland(struct weston_compositor *comp)
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{
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const struct weston_xwayland_api *api;
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struct weston_xwayland *xwayland;
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struct wet_xwayland *wxw;
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struct wl_event_loop *loop;
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if (weston_compositor_load_xwayland(comp) < 0)
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return -1;
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api = weston_xwayland_get_api(comp);
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if (!api) {
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weston_log("Failed to get the xwayland module API.\n");
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return -1;
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}
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xwayland = api->get(comp);
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if (!xwayland) {
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weston_log("Failed to get the xwayland object.\n");
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return -1;
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}
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wxw = zalloc(sizeof *wxw);
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if (!wxw)
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return -1;
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wxw->compositor = comp;
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wxw->api = api;
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wxw->xwayland = xwayland;
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wxw->process.cleanup = xserver_cleanup;
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if (api->listen(xwayland, wxw, spawn_xserver) < 0)
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return -1;
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loop = wl_display_get_event_loop(comp->wl_display);
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wxw->sigusr1_source = wl_event_loop_add_signal(loop, SIGUSR1,
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handle_sigusr1, wxw);
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return 0;
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}
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