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/*
* Copyright (c) 2015 General Electric Company. All rights reserved.
*
* 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 <errno.h>
#include <stdlib.h>
#include <systemd/sd-daemon.h>
#include <sys/socket.h>
#include <wayland-server.h>
#include "shared/helpers.h"
#include "shared/zalloc.h"
#include "compositor.h"
struct systemd_notifier {
int watchdog_time;
struct wl_event_source *watchdog_source;
struct wl_listener compositor_destroy_listener;
};
static int
add_systemd_sockets(struct weston_compositor *compositor)
{
int fd;
int cnt_systemd_sockets;
int current_fd = 0;
cnt_systemd_sockets = sd_listen_fds(1);
if (cnt_systemd_sockets < 0) {
weston_log("sd_listen_fds failed with: %d\n",
cnt_systemd_sockets);
return -1;
}
/* socket-based activation not used, return silently */
if (cnt_systemd_sockets == 0)
return 0;
while (current_fd < cnt_systemd_sockets) {
fd = SD_LISTEN_FDS_START + current_fd;
if (sd_is_socket(fd, AF_UNIX, SOCK_STREAM,1) <= 0) {
weston_log("invalid socket provided from systemd\n");
return -1;
}
if (wl_display_add_socket_fd(compositor->wl_display, fd)) {
weston_log("wl_display_add_socket_fd failed"
"for systemd provided socket\n");
return -1;
}
current_fd++;
}
weston_log("info: add %d socket(s) provided by systemd\n",
current_fd);
return current_fd;
}
static int
watchdog_handler(void *data)
{
struct systemd_notifier *notifier = data;
wl_event_source_timer_update(notifier->watchdog_source,
notifier->watchdog_time);
sd_notify(0, "WATCHDOG=1");
return 1;
}
static void
weston_compositor_destroy_listener(struct wl_listener *listener, void *data)
{
struct systemd_notifier *notifier;
sd_notify(0, "STOPPING=1");
notifier = container_of(listener,
struct systemd_notifier,
compositor_destroy_listener);
if (notifier->watchdog_source)
wl_event_source_remove(notifier->watchdog_source);
wl_list_remove(¬ifier->compositor_destroy_listener.link);
free(notifier);
}
WL_EXPORT int
module_init(struct weston_compositor *compositor,
int *argc, char *argv[])
{
char *tail;
char *watchdog_time_env;
struct wl_event_loop *loop;
long watchdog_time_conv;
struct systemd_notifier *notifier;
notifier = zalloc(sizeof *notifier);
if (notifier == NULL)
return -1;
notifier->compositor_destroy_listener.notify =
weston_compositor_destroy_listener;
wl_signal_add(&compositor->destroy_signal,
¬ifier->compositor_destroy_listener);
if (add_systemd_sockets(compositor) < 0)
return -1;
sd_notify(0, "READY=1");
/* 'WATCHDOG_USEC' is environment variable that is set
* by systemd to transfer 'WatchdogSec' watchdog timeout
* setting from service file.*/
watchdog_time_env = getenv("WATCHDOG_USEC");
if (!watchdog_time_env)
return 0;
errno = 0;
watchdog_time_conv = strtol(watchdog_time_env, &tail, 0);
if ((errno != 0) || (*tail != '\0'))
return 0;
/* Convert 'WATCHDOG_USEC' to milliseconds and notify
* systemd every half of that time.*/
watchdog_time_conv /= 1000 * 2;
if (watchdog_time_conv <= 0)
return 0;
notifier->watchdog_time = watchdog_time_conv;
loop = wl_display_get_event_loop(compositor->wl_display);
notifier->watchdog_source =
wl_event_loop_add_timer(loop, watchdog_handler, notifier);
wl_event_source_timer_update(notifier->watchdog_source,
notifier->watchdog_time);
return 0;
}
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