1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2015 Daniel Mack
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include "sd-messages.h"
29 #include "alloc-util.h"
30 #include "audit-util.h"
31 #include "bus-common-errors.h"
32 #include "bus-error.h"
34 #include "formats-util.h"
36 //#include "special.h"
38 #include "unit-name.h"
39 #include "user-util.h"
40 #include "utmp-wtmp.h"
42 _const_ static usec_t when_wall(usec_t n, usec_t elapse) {
46 static const int wall_timers[] = {
47 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
48 25, 40, 55, 70, 100, 130, 150, 180,
51 /* If the time is already passed, then don't announce */
57 for (i = 1; i < ELEMENTSOF(wall_timers); i++)
58 if (wall_timers[i] * USEC_PER_MINUTE >= left)
59 return left - wall_timers[i-1] * USEC_PER_MINUTE;
61 return left % USEC_PER_HOUR;
64 bool logind_wall_tty_filter(const char *tty, void *userdata) {
66 Manager *m = userdata;
70 if (!startswith(tty, "/dev/"))
73 return !streq(tty + 5, m->scheduled_shutdown_tty);
76 static int warn_wall(Manager *m, usec_t n) {
77 char date[FORMAT_TIMESTAMP_MAX] = {};
78 _cleanup_free_ char *l = NULL;
84 if (!m->enable_wall_messages)
87 left = m->scheduled_shutdown_timeout > n;
89 r = asprintf(&l, "%s%sThe system is going down for %s %s%s!",
90 strempty(m->wall_message),
91 isempty(m->wall_message) ? "" : "\n",
92 m->scheduled_shutdown_type,
94 left ? format_timestamp(date, sizeof(date), m->scheduled_shutdown_timeout) : "");
100 utmp_wall(l, uid_to_name(m->scheduled_shutdown_uid),
101 m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
106 static int wall_message_timeout_handler(
111 Manager *m = userdata;
116 assert(s == m->wall_message_timeout_source);
118 n = now(CLOCK_REALTIME);
124 next = when_wall(n, m->scheduled_shutdown_timeout);
126 r = sd_event_source_set_time(s, n + next);
128 return log_error_errno(r, "sd_event_source_set_time() failed. %m");
130 r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT);
132 return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
138 int manager_setup_wall_message_timer(Manager *m) {
145 n = now(CLOCK_REALTIME);
146 elapse = m->scheduled_shutdown_timeout;
148 /* wall message handling */
150 if (isempty(m->scheduled_shutdown_type)) {
158 /* Warn immediately if less than 15 minutes are left */
159 if (elapse - n < 15 * USEC_PER_MINUTE) {
165 elapse = when_wall(n, elapse);
169 if (m->wall_message_timeout_source) {
170 r = sd_event_source_set_time(m->wall_message_timeout_source, n + elapse);
172 return log_error_errno(r, "sd_event_source_set_time() failed. %m");
174 r = sd_event_source_set_enabled(m->wall_message_timeout_source, SD_EVENT_ONESHOT);
176 return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
178 r = sd_event_add_time(m->event, &m->wall_message_timeout_source,
179 CLOCK_REALTIME, n + elapse, 0, wall_message_timeout_handler, m);
181 return log_error_errno(r, "sd_event_add_time() failed. %m");