1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2015 Daniel Mack
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include "sd-messages.h"
28 #include "alloc-util.h"
29 #include "audit-util.h"
30 #include "bus-common-errors.h"
31 #include "bus-error.h"
33 #include "format-util.h"
35 #include "path-util.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
) {
65 Manager
*m
= userdata
;
70 if (!m
->scheduled_shutdown_tty
)
73 p
= path_startswith(tty
, "/dev/");
77 return !streq(p
, m
->scheduled_shutdown_tty
);
80 static int warn_wall(Manager
*m
, usec_t n
) {
81 char date
[FORMAT_TIMESTAMP_MAX
] = {};
82 _cleanup_free_
char *l
= NULL
;
88 if (!m
->enable_wall_messages
)
91 left
= m
->scheduled_shutdown_timeout
> n
;
93 r
= asprintf(&l
, "%s%sThe system is going down for %s %s%s!",
94 strempty(m
->wall_message
),
95 isempty(m
->wall_message
) ? "" : "\n",
96 m
->scheduled_shutdown_type
,
98 left
? format_timestamp(date
, sizeof(date
), m
->scheduled_shutdown_timeout
) : "");
104 utmp_wall(l
, uid_to_name(m
->scheduled_shutdown_uid
),
105 m
->scheduled_shutdown_tty
, logind_wall_tty_filter
, m
);
110 static int wall_message_timeout_handler(
115 Manager
*m
= userdata
;
120 assert(s
== m
->wall_message_timeout_source
);
122 n
= now(CLOCK_REALTIME
);
128 next
= when_wall(n
, m
->scheduled_shutdown_timeout
);
130 r
= sd_event_source_set_time(s
, n
+ next
);
132 return log_error_errno(r
, "sd_event_source_set_time() failed. %m");
134 r
= sd_event_source_set_enabled(s
, SD_EVENT_ONESHOT
);
136 return log_error_errno(r
, "sd_event_source_set_enabled() failed. %m");
142 int manager_setup_wall_message_timer(Manager
*m
) {
149 n
= now(CLOCK_REALTIME
);
150 elapse
= m
->scheduled_shutdown_timeout
;
152 /* wall message handling */
154 if (isempty(m
->scheduled_shutdown_type
)) {
162 /* Warn immediately if less than 15 minutes are left */
163 if (elapse
- n
< 15 * USEC_PER_MINUTE
) {
169 elapse
= when_wall(n
, elapse
);
173 if (m
->wall_message_timeout_source
) {
174 r
= sd_event_source_set_time(m
->wall_message_timeout_source
, n
+ elapse
);
176 return log_error_errno(r
, "sd_event_source_set_time() failed. %m");
178 r
= sd_event_source_set_enabled(m
->wall_message_timeout_source
, SD_EVENT_ONESHOT
);
180 return log_error_errno(r
, "sd_event_source_set_enabled() failed. %m");
182 r
= sd_event_add_time(m
->event
, &m
->wall_message_timeout_source
,
183 CLOCK_REALTIME
, n
+ elapse
, 0, wall_message_timeout_handler
, m
);
185 return log_error_errno(r
, "sd_event_add_time() failed. %m");