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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <getopt.h>
#include <sys/socket.h>
#include <unistd.h>
#include "sd-messages.h"
#include "battery-util.h"
#include "build.h"
#include "errno-util.h"
#include "fd-util.h"
#include "glyph-util.h"
#include "io-util.h"
#include "log.h"
#include "main-func.h"
#include "parse-util.h"
#include "plymouth-util.h"
#include "pretty-print.h"
#include "proc-cmdline.h"
#include "socket-util.h"
#include "terminal-util.h"
#include "time-util.h"
#define BATTERY_LOW_MESSAGE \
"Battery level critically low. Please connect your charger or the system will power off in 10 seconds."
#define BATTERY_RESTORED_MESSAGE \
"A.C. power restored, continuing."
static bool arg_doit = true;
static int help(void) {
_cleanup_free_ char *link = NULL;
int r;
r = terminal_urlify_man("systemd-battery-check", "8", &link);
if (r < 0)
return log_oom();
printf("%s\n\n"
"%sCheck battery level to see whether there's enough charge.%s\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
"\nSee the %s for details.\n",
program_invocation_short_name,
ansi_highlight(),
ansi_normal(),
link);
return 0;
}
static int plymouth_send_message(const char *mode, const char *message) {
_cleanup_free_ char *plymouth_message = NULL;
int c, r;
assert(mode);
assert(message);
c = asprintf(&plymouth_message,
"C\x02%c%s%c"
"M\x02%c%s%c",
(int) strlen(mode) + 1, mode, '\x00',
(int) strlen(message) + 1, message, '\x00');
if (c < 0)
return log_oom();
/* We set SOCK_NONBLOCK here so that we rather drop the message than wait for plymouth */
r = plymouth_send_raw(plymouth_message, c, SOCK_NONBLOCK);
if (r < 0)
return log_full_errno(ERRNO_IS_NO_PLYMOUTH(r) ? LOG_DEBUG : LOG_WARNING, r,
"Failed to communicate with plymouth: %m");
return 0;
}
static int parse_argv(int argc, char * argv[]) {
enum {
ARG_VERSION = 0x100,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{}
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
return help();
case ARG_VERSION:
return version();
case '?':
return -EINVAL;
default:
assert_not_reached();
}
if (optind < argc)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"%s takes no argument.",
program_invocation_short_name);
return 1;
}
static int run(int argc, char *argv[]) {
_cleanup_free_ char *plymouth_message = NULL;
_cleanup_close_ int fd = -EBADF;
int r;
log_setup();
r = proc_cmdline_get_bool("systemd.battery-check", PROC_CMDLINE_STRIP_RD_PREFIX|PROC_CMDLINE_TRUE_WHEN_MISSING, &arg_doit);
if (r < 0)
log_warning_errno(r, "Failed to parse systemd.battery-check= kernel command line option, ignoring: %m");
r = parse_argv(argc, argv);
if (r <= 0)
return r;
if (!arg_doit) {
log_info("Checking battery status and AC power existence is disabled by the kernel command line, skipping execution.");
return 0;
}
r = battery_is_discharging_and_low();
if (r < 0) {
log_warning_errno(r, "Failed to check battery status, ignoring: %m");
return 0;
}
if (r == 0)
return 0;
log_struct(LOG_EMERG,
LOG_MESSAGE("%s " BATTERY_LOW_MESSAGE, special_glyph(SPECIAL_GLYPH_LOW_BATTERY)),
"MESSAGE_ID=" SD_MESSAGE_BATTERY_LOW_WARNING_STR);
fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
if (fd < 0)
log_warning_errno(fd, "Failed to open console, ignoring: %m");
else
dprintf(fd, ANSI_HIGHLIGHT_RED "%s " BATTERY_LOW_MESSAGE ANSI_NORMAL "\n",
special_glyph_full(SPECIAL_GLYPH_LOW_BATTERY, /* force_utf = */ false));
if (asprintf(&plymouth_message, "%s " BATTERY_LOW_MESSAGE,
special_glyph_full(SPECIAL_GLYPH_LOW_BATTERY, /* force_utf = */ true)) < 0)
return log_oom();
(void) plymouth_send_message("shutdown", plymouth_message);
usleep_safe(10 * USEC_PER_SEC);
r = battery_is_discharging_and_low();
if (r < 0)
return log_warning_errno(r, "Failed to check battery status, assuming not charged yet, powering off: %m");
if (r > 0) {
log_struct(LOG_EMERG,
LOG_MESSAGE("Battery level critically low, powering off."),
"MESSAGE_ID=" SD_MESSAGE_BATTERY_LOW_POWEROFF_STR);
return r;
}
log_info(BATTERY_RESTORED_MESSAGE);
if (fd >= 0)
dprintf(fd, BATTERY_RESTORED_MESSAGE "\n");
(void) plymouth_send_message("boot-up", BATTERY_RESTORED_MESSAGE);
return 0;
}
DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
|
