2 This file is part of systemd.
4 Copyright 2015 Daniel Mack
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include "sd-messages.h"
27 #include "alloc-util.h"
28 #include "audit-util.h"
29 #include "bus-common-errors.h"
30 #include "bus-error.h"
32 #include "formats-util.h"
36 #include "unit-name.h"
37 #include "user-util.h"
38 #include "utmp-wtmp.h"
40 _const_
static usec_t
when_wall(usec_t n
, usec_t elapse
) {
44 static const int wall_timers
[] = {
45 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
46 25, 40, 55, 70, 100, 130, 150, 180,
49 /* If the time is already passed, then don't announce */
55 for (i
= 1; i
< ELEMENTSOF(wall_timers
); i
++)
56 if (wall_timers
[i
] * USEC_PER_MINUTE
>= left
)
57 return left
- wall_timers
[i
-1] * USEC_PER_MINUTE
;
59 return left
% USEC_PER_HOUR
;
62 bool logind_wall_tty_filter(const char *tty
, void *userdata
) {
64 Manager
*m
= userdata
;
68 if (!startswith(tty
, "/dev/"))
71 return !streq(tty
+ 5, m
->scheduled_shutdown_tty
);
74 static int warn_wall(Manager
*m
, usec_t n
) {
75 char date
[FORMAT_TIMESTAMP_MAX
] = {};
76 _cleanup_free_
char *l
= NULL
;
82 if (!m
->enable_wall_messages
)
85 left
= m
->scheduled_shutdown_timeout
> n
;
87 r
= asprintf(&l
, "%s%sThe system is going down for %s %s%s!",
88 strempty(m
->wall_message
),
89 isempty(m
->wall_message
) ? "" : "\n",
90 m
->scheduled_shutdown_type
,
92 left
? format_timestamp(date
, sizeof(date
), m
->scheduled_shutdown_timeout
) : "");
98 utmp_wall(l
, uid_to_name(m
->scheduled_shutdown_uid
),
99 m
->scheduled_shutdown_tty
, logind_wall_tty_filter
, m
);
104 static int wall_message_timeout_handler(
109 Manager
*m
= userdata
;
114 assert(s
== m
->wall_message_timeout_source
);
116 n
= now(CLOCK_REALTIME
);
122 next
= when_wall(n
, m
->scheduled_shutdown_timeout
);
124 r
= sd_event_source_set_time(s
, n
+ next
);
126 return log_error_errno(r
, "sd_event_source_set_time() failed. %m");
128 r
= sd_event_source_set_enabled(s
, SD_EVENT_ONESHOT
);
130 return log_error_errno(r
, "sd_event_source_set_enabled() failed. %m");
136 int manager_setup_wall_message_timer(Manager
*m
) {
143 n
= now(CLOCK_REALTIME
);
144 elapse
= m
->scheduled_shutdown_timeout
;
146 /* wall message handling */
148 if (isempty(m
->scheduled_shutdown_type
)) {
156 /* Warn immediately if less than 15 minutes are left */
157 if (elapse
- n
< 15 * USEC_PER_MINUTE
) {
163 elapse
= when_wall(n
, elapse
);
167 if (m
->wall_message_timeout_source
) {
168 r
= sd_event_source_set_time(m
->wall_message_timeout_source
, n
+ elapse
);
170 return log_error_errno(r
, "sd_event_source_set_time() failed. %m");
172 r
= sd_event_source_set_enabled(m
->wall_message_timeout_source
, SD_EVENT_ONESHOT
);
174 return log_error_errno(r
, "sd_event_source_set_enabled() failed. %m");
176 r
= sd_event_add_time(m
->event
, &m
->wall_message_timeout_source
,
177 CLOCK_REALTIME
, n
+ elapse
, 0, wall_message_timeout_handler
, m
);
179 return log_error_errno(r
, "sd_event_add_time() failed. %m");