-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2015 Daniel Mack
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <pwd.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "sd-messages.h"
-
-#include "alloc-util.h"
-#include "audit-util.h"
-#include "bus-common-errors.h"
-#include "bus-error.h"
-#include "bus-util.h"
-#include "formats-util.h"
-#include "logind.h"
-//#include "special.h"
-#include "strv.h"
-#include "unit-name.h"
-#include "user-util.h"
-#include "utmp-wtmp.h"
-
-_const_ static usec_t when_wall(usec_t n, usec_t elapse) {
-
- usec_t left;
- unsigned int i;
- static const int wall_timers[] = {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
- 25, 40, 55, 70, 100, 130, 150, 180,
- };
-
- /* If the time is already passed, then don't announce */
- if (n >= elapse)
- return 0;
-
- left = elapse - n;
-
- for (i = 1; i < ELEMENTSOF(wall_timers); i++)
- if (wall_timers[i] * USEC_PER_MINUTE >= left)
- return left - wall_timers[i-1] * USEC_PER_MINUTE;
-
- return left % USEC_PER_HOUR;
-}
-
-bool logind_wall_tty_filter(const char *tty, void *userdata) {
-
- Manager *m = userdata;
-
- assert(m);
-
- if (!startswith(tty, "/dev/"))
- return true;
-
- return !streq(tty + 5, m->scheduled_shutdown_tty);
-}
-
-static int warn_wall(Manager *m, usec_t n) {
- char date[FORMAT_TIMESTAMP_MAX] = {};
- _cleanup_free_ char *l = NULL;
- usec_t left;
- int r;
-
- assert(m);
-
- if (!m->enable_wall_messages)
- return 0;
-
- left = m->scheduled_shutdown_timeout > n;
-
- r = asprintf(&l, "%s%sThe system is going down for %s %s%s!",
- strempty(m->wall_message),
- isempty(m->wall_message) ? "" : "\n",
- m->scheduled_shutdown_type,
- left ? "at " : "NOW",
- left ? format_timestamp(date, sizeof(date), m->scheduled_shutdown_timeout) : "");
- if (r < 0) {
- log_oom();
- return 0;
- }
-
- utmp_wall(l, uid_to_name(m->scheduled_shutdown_uid),
- m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
-
- return 1;
-}
-
-static int wall_message_timeout_handler(
- sd_event_source *s,
- uint64_t usec,
- void *userdata) {
-
- Manager *m = userdata;
- usec_t n, next;
- int r;
-
- assert(m);
- assert(s == m->wall_message_timeout_source);
-
- n = now(CLOCK_REALTIME);
-
- r = warn_wall(m, n);
- if (r == 0)
- return 0;
-
- next = when_wall(n, m->scheduled_shutdown_timeout);
- if (next > 0) {
- r = sd_event_source_set_time(s, n + next);
- if (r < 0)
- return log_error_errno(r, "sd_event_source_set_time() failed. %m");
-
- r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT);
- if (r < 0)
- return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
- }
-
- return 0;
-}
-
-int manager_setup_wall_message_timer(Manager *m) {
-
- usec_t n, elapse;
- int r;
-
- assert(m);
-
- n = now(CLOCK_REALTIME);
- elapse = m->scheduled_shutdown_timeout;
-
- /* wall message handling */
-
- if (isempty(m->scheduled_shutdown_type)) {
- warn_wall(m, n);
- return 0;
- }
-
- if (elapse < n)
- return 0;
-
- /* Warn immediately if less than 15 minutes are left */
- if (elapse - n < 15 * USEC_PER_MINUTE) {
- r = warn_wall(m, n);
- if (r == 0)
- return 0;
- }
-
- elapse = when_wall(n, elapse);
- if (elapse == 0)
- return 0;
-
- if (m->wall_message_timeout_source) {
- r = sd_event_source_set_time(m->wall_message_timeout_source, n + elapse);
- if (r < 0)
- return log_error_errno(r, "sd_event_source_set_time() failed. %m");
-
- r = sd_event_source_set_enabled(m->wall_message_timeout_source, SD_EVENT_ONESHOT);
- if (r < 0)
- return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
- } else {
- r = sd_event_add_time(m->event, &m->wall_message_timeout_source,
- CLOCK_REALTIME, n + elapse, 0, wall_message_timeout_handler, m);
- if (r < 0)
- return log_error_errno(r, "sd_event_add_time() failed. %m");
- }
-
- return 0;
-}
~ianmdlvl / elogind.git / commitdiff