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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
Copyright 2013 Zbigniew Jędrzejewski-Szmek
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include "sd-messages.h"
#include "def.h"
#include "fd-util.h"
#include "fileio.h"
#include "log.h"
#include "sleep-config.h"
#include "string-util.h"
#include "strv.h"
#include "util.h"
static char* arg_verb = NULL;
static int write_mode(char **modes) {
int r = 0;
char **mode;
STRV_FOREACH(mode, modes) {
int k;
k = write_string_file("/sys/power/disk", *mode, 0);
if (k == 0)
return 0;
log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
*mode);
if (r == 0)
r = k;
}
if (r < 0)
log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
return r;
}
static int write_state(FILE **f, char **states) {
char **state;
int r = 0;
STRV_FOREACH(state, states) {
int k;
k = write_string_stream(*f, *state, true);
if (k == 0)
return 0;
log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
*state);
if (r == 0)
r = k;
fclose(*f);
*f = fopen("/sys/power/state", "we");
if (!*f)
return log_error_errno(errno, "Failed to open /sys/power/state: %m");
}
return r;
}
static int execute(char **modes, char **states) {
char *arguments[] = {
NULL,
(char*) "pre",
arg_verb,
NULL
};
static const char* const dirs[] = {SYSTEM_SLEEP_PATH, NULL};
int r;
_cleanup_fclose_ FILE *f = NULL;
/* This file is opened first, so that if we hit an error,
* we can abort before modifying any state. */
f = fopen("/sys/power/state", "we");
if (!f)
return log_error_errno(errno, "Failed to open /sys/power/state: %m");
/* Configure the hibernation mode */
r = write_mode(modes);
if (r < 0)
return r;
execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
log_struct(LOG_INFO,
"MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
LOG_MESSAGE("Suspending system..."),
"SLEEP=%s", arg_verb,
NULL);
r = write_state(&f, states);
if (r < 0)
return r;
log_struct(LOG_INFO,
"MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
LOG_MESSAGE("System resumed."),
"SLEEP=%s", arg_verb,
NULL);
arguments[1] = (char*) "post";
execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
return r;
}
static void help(void) {
printf("%s COMMAND\n\n"
"Suspend the system, hibernate the system, or both.\n\n"
"Commands:\n"
" -h --help Show this help and exit\n"
" --version Print version string and exit\n"
" suspend Suspend the system\n"
" hibernate Hibernate the system\n"
" hybrid-sleep Both hibernate and suspend the system\n"
, program_invocation_short_name);
}
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':
help();
return 0; /* done */
case ARG_VERSION:
return version();
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
if (argc - optind != 1) {
log_error("Usage: %s COMMAND",
program_invocation_short_name);
return -EINVAL;
}
arg_verb = argv[optind];
if (!streq(arg_verb, "suspend") &&
!streq(arg_verb, "hibernate") &&
!streq(arg_verb, "hybrid-sleep")) {
log_error("Unknown command '%s'.", arg_verb);
return -EINVAL;
}
return 1 /* work to do */;
}
int main(int argc, char *argv[]) {
_cleanup_strv_free_ char **modes = NULL, **states = NULL;
int r;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
r = parse_sleep_config(arg_verb, &modes, &states);
if (r < 0)
goto finish;
r = execute(modes, states);
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
|
