1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.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 "event-util.h"
#include "format-util.h"
#include "logind.h"
#include "path-util.h"
#include "special.h"
#include "strv.h"
#include "unit-name.h"
#include "user-util.h"
#include "wall.h"
static usec_t when_wall(usec_t n, usec_t elapse) {
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;
usec_t left = elapse - n;
for (unsigned 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, bool is_local, void *userdata) {
Manager *m = ASSERT_PTR(userdata);
assert(handle_action_valid(m->scheduled_shutdown_action));
const char *p = path_startswith(tty, "/dev/");
if (!p)
return true;
/* Do not send information about events which do not destroy local sessions to local terminals. We
* can assume that if the system enters sleep or hibernation, this will be visible in an obvious way
* for any local user. And once the systems exits sleep or hibernation, the notification would be
* just noise, in particular for auto-suspend. */
if (is_local && HANDLE_ACTION_IS_SLEEP(m->scheduled_shutdown_action))
return false;
return !streq_ptr(p, m->scheduled_shutdown_tty);
}
static int warn_wall(Manager *m, usec_t n) {
assert(m);
if (!handle_action_valid(m->scheduled_shutdown_action))
return 0;
bool left = m->scheduled_shutdown_timeout > n;
_cleanup_free_ char *l = NULL;
if (asprintf(&l, "%s%sThe system will %s %s%s!",
strempty(m->wall_message),
isempty(m->wall_message) ? "" : "\n",
handle_action_verb_to_string(m->scheduled_shutdown_action),
left ? "at " : "now",
left ? FORMAT_TIMESTAMP(m->scheduled_shutdown_timeout) : "") < 0) {
log_oom();
return 1; /* We're out-of-memory for now, but let's try to print the message later */
}
_cleanup_free_ char *username = uid_to_name(m->scheduled_shutdown_uid);
int level = left ? LOG_INFO : LOG_NOTICE;
log_struct(level,
LOG_MESSAGE("%s", l),
"ACTION=%s", handle_action_to_string(m->scheduled_shutdown_action),
"MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_SCHEDULED_STR,
username ? "OPERATOR=%s" : NULL, username);
if (m->enable_wall_messages)
(void) wall(l, username, 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 = ASSERT_PTR(userdata);
int r;
assert(s == m->wall_message_timeout_source);
usec_t n = now(CLOCK_REALTIME);
r = warn_wall(m, n);
if (r == 0)
return 0;
usec_t 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) {
int r;
assert(m);
usec_t n = now(CLOCK_REALTIME);
usec_t elapse = m->scheduled_shutdown_timeout;
/* wall message handling */
if (!handle_action_valid(m->scheduled_shutdown_action))
return 0;
if (elapse > 0 && elapse < n)
return 0;
/* Warn immediately if less than 15 minutes are left */
if (elapse == 0 || 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;
r = event_reset_time(m->event, &m->wall_message_timeout_source,
CLOCK_REALTIME,
n + elapse, 0,
wall_message_timeout_handler, m,
0, "wall-message-timer", true);
if (r < 0) {
m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
return log_error_errno(r, "Failed to set up wall message timer: %m");
}
return 0;
}
|
