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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
6edd7d0a LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2012 Lennart Poettering | |
19adb8a3 | 6 | Copyright 2013 Zbigniew Jędrzejewski-Szmek |
c58493c0 | 7 | Copyright 2018 Dell Inc. |
6edd7d0a LP |
8 | |
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
6edd7d0a | 23 | #include <errno.h> |
19adb8a3 | 24 | #include <getopt.h> |
3f6fd1ba | 25 | #include <stdio.h> |
6edd7d0a | 26 | |
aa62a893 | 27 | #include "sd-messages.h" |
3f6fd1ba | 28 | |
c58493c0 | 29 | #include "parse-util.h" |
3f6fd1ba | 30 | #include "def.h" |
89711996 | 31 | #include "exec-util.h" |
3ffd4af2 | 32 | #include "fd-util.h" |
a5c32cff | 33 | #include "fileio.h" |
3f6fd1ba | 34 | #include "log.h" |
19adb8a3 | 35 | #include "sleep-config.h" |
c58493c0 | 36 | #include "stdio-util.h" |
07630cea | 37 | #include "string-util.h" |
3f6fd1ba LP |
38 | #include "strv.h" |
39 | #include "util.h" | |
19adb8a3 ZJS |
40 | |
41 | static char* arg_verb = NULL; | |
42 | ||
43 | static int write_mode(char **modes) { | |
44 | int r = 0; | |
45 | char **mode; | |
46 | ||
47 | STRV_FOREACH(mode, modes) { | |
aa62a893 LP |
48 | int k; |
49 | ||
4c1fc3e4 | 50 | k = write_string_file("/sys/power/disk", *mode, 0); |
19adb8a3 ZJS |
51 | if (k == 0) |
52 | return 0; | |
aa62a893 | 53 | |
c33b3297 MS |
54 | log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", |
55 | *mode); | |
19adb8a3 ZJS |
56 | if (r == 0) |
57 | r = k; | |
58 | } | |
6edd7d0a | 59 | |
19adb8a3 | 60 | if (r < 0) |
c33b3297 | 61 | log_error_errno(r, "Failed to write mode to /sys/power/disk: %m"); |
6edd7d0a | 62 | |
19adb8a3 ZJS |
63 | return r; |
64 | } | |
6edd7d0a | 65 | |
2fd069b1 | 66 | static int write_state(FILE **f, char **states) { |
19adb8a3 ZJS |
67 | char **state; |
68 | int r = 0; | |
69 | ||
70 | STRV_FOREACH(state, states) { | |
71 | int k; | |
72 | ||
b1837133 | 73 | k = write_string_stream(*f, *state, 0); |
19adb8a3 ZJS |
74 | if (k == 0) |
75 | return 0; | |
c33b3297 MS |
76 | log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m", |
77 | *state); | |
19adb8a3 ZJS |
78 | if (r == 0) |
79 | r = k; | |
80 | ||
2fd069b1 ZJS |
81 | fclose(*f); |
82 | *f = fopen("/sys/power/state", "we"); | |
4a62c710 MS |
83 | if (!*f) |
84 | return log_error_errno(errno, "Failed to open /sys/power/state: %m"); | |
6edd7d0a LP |
85 | } |
86 | ||
19adb8a3 ZJS |
87 | return r; |
88 | } | |
6edd7d0a | 89 | |
19adb8a3 | 90 | static int execute(char **modes, char **states) { |
e2cc6eca LP |
91 | |
92 | char *arguments[] = { | |
93 | NULL, | |
94 | (char*) "pre", | |
95 | arg_verb, | |
96 | NULL | |
97 | }; | |
b5084605 LP |
98 | static const char* const dirs[] = { |
99 | SYSTEM_SLEEP_PATH, | |
100 | NULL | |
101 | }; | |
e2cc6eca | 102 | |
19adb8a3 | 103 | int r; |
2fd069b1 | 104 | _cleanup_fclose_ FILE *f = NULL; |
6524990f | 105 | |
19adb8a3 | 106 | /* This file is opened first, so that if we hit an error, |
09692409 | 107 | * we can abort before modifying any state. */ |
6edd7d0a | 108 | f = fopen("/sys/power/state", "we"); |
4a62c710 MS |
109 | if (!f) |
110 | return log_error_errno(errno, "Failed to open /sys/power/state: %m"); | |
6edd7d0a | 111 | |
19adb8a3 ZJS |
112 | /* Configure the hibernation mode */ |
113 | r = write_mode(modes); | |
114 | if (r < 0) | |
115 | return r; | |
116 | ||
c6e47247 | 117 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments); |
6edd7d0a | 118 | |
19adb8a3 | 119 | log_struct(LOG_INFO, |
2b044526 | 120 | "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR, |
e2cc6eca LP |
121 | LOG_MESSAGE("Suspending system..."), |
122 | "SLEEP=%s", arg_verb, | |
19adb8a3 ZJS |
123 | NULL); |
124 | ||
2fd069b1 | 125 | r = write_state(&f, states); |
19adb8a3 ZJS |
126 | if (r < 0) |
127 | return r; | |
128 | ||
129 | log_struct(LOG_INFO, | |
2b044526 | 130 | "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR, |
a5ccdb98 | 131 | LOG_MESSAGE("System resumed."), |
e2cc6eca | 132 | "SLEEP=%s", arg_verb, |
19adb8a3 | 133 | NULL); |
eb267289 | 134 | |
6edd7d0a | 135 | arguments[1] = (char*) "post"; |
c6e47247 | 136 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments); |
6edd7d0a | 137 | |
19adb8a3 ZJS |
138 | return r; |
139 | } | |
6edd7d0a | 140 | |
c58493c0 ML |
141 | static int read_wakealarm(uint64_t *result) { |
142 | _cleanup_free_ char *t = NULL; | |
143 | ||
144 | if (read_one_line_file("/sys/class/rtc/rtc0/since_epoch", &t) >= 0) | |
145 | return safe_atou64(t, result); | |
146 | return -EBADF; | |
147 | } | |
148 | ||
149 | static int write_wakealarm(const char *str) { | |
150 | ||
151 | _cleanup_fclose_ FILE *f = NULL; | |
152 | int r; | |
153 | ||
154 | f = fopen("/sys/class/rtc/rtc0/wakealarm", "we"); | |
155 | if (!f) | |
156 | return log_error_errno(errno, "Failed to open /sys/class/rtc/rtc0/wakealarm: %m"); | |
157 | ||
158 | r = write_string_stream(f, str, 0); | |
159 | if (r < 0) | |
160 | return log_error_errno(r, "Failed to write '%s' to /sys/class/rtc/rtc0/wakealarm: %m", str); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | static int execute_s2h(usec_t hibernate_delay_sec) { | |
166 | ||
167 | _cleanup_strv_free_ char **hibernate_modes = NULL, **hibernate_states = NULL, | |
168 | **suspend_modes = NULL, **suspend_states = NULL; | |
169 | usec_t orig_time, cmp_time; | |
170 | char time_str[DECIMAL_STR_MAX(uint64_t)]; | |
171 | int r; | |
172 | ||
173 | r = parse_sleep_config("suspend", &suspend_modes, &suspend_states, | |
174 | NULL); | |
175 | if (r < 0) | |
176 | return r; | |
177 | ||
178 | r = parse_sleep_config("hibernate", &hibernate_modes, | |
179 | &hibernate_states, NULL); | |
180 | if (r < 0) | |
181 | return r; | |
182 | ||
183 | r = read_wakealarm(&orig_time); | |
184 | if (r < 0) | |
185 | return log_error_errno(errno, "Failed to read time: %d", r); | |
186 | ||
187 | orig_time += hibernate_delay_sec / USEC_PER_SEC; | |
188 | xsprintf(time_str, "%" PRIu64, orig_time); | |
189 | ||
190 | r = write_wakealarm(time_str); | |
191 | if (r < 0) | |
192 | return r; | |
193 | ||
194 | log_debug("Set RTC wake alarm for %s", time_str); | |
195 | ||
196 | r = execute(suspend_modes, suspend_states); | |
197 | if (r < 0) | |
198 | return r; | |
199 | ||
200 | r = read_wakealarm(&cmp_time); | |
201 | if (r < 0) | |
202 | return log_error_errno(errno, "Failed to read time: %d", r); | |
203 | ||
204 | /* reset RTC */ | |
205 | r = write_wakealarm("0"); | |
206 | if (r < 0) | |
207 | return r; | |
208 | ||
209 | log_debug("Woke up at %"PRIu64, cmp_time); | |
210 | ||
211 | /* if woken up after alarm time, hibernate */ | |
212 | if (cmp_time >= orig_time) | |
213 | r = execute(hibernate_modes, hibernate_states); | |
214 | ||
215 | return r; | |
216 | } | |
217 | ||
601185b4 | 218 | static void help(void) { |
19adb8a3 ZJS |
219 | printf("%s COMMAND\n\n" |
220 | "Suspend the system, hibernate the system, or both.\n\n" | |
221 | "Commands:\n" | |
222 | " -h --help Show this help and exit\n" | |
223 | " --version Print version string and exit\n" | |
224 | " suspend Suspend the system\n" | |
225 | " hibernate Hibernate the system\n" | |
226 | " hybrid-sleep Both hibernate and suspend the system\n" | |
e68c79db | 227 | " suspend-then-hibernate Initially suspend and then hibernate\n" |
c58493c0 | 228 | " the system after a fixed period of time\n" |
601185b4 | 229 | , program_invocation_short_name); |
19adb8a3 | 230 | } |
6edd7d0a | 231 | |
19adb8a3 ZJS |
232 | static int parse_argv(int argc, char *argv[]) { |
233 | enum { | |
234 | ARG_VERSION = 0x100, | |
235 | }; | |
236 | ||
237 | static const struct option options[] = { | |
238 | { "help", no_argument, NULL, 'h' }, | |
239 | { "version", no_argument, NULL, ARG_VERSION }, | |
eb9da376 | 240 | {} |
19adb8a3 ZJS |
241 | }; |
242 | ||
243 | int c; | |
244 | ||
245 | assert(argc >= 0); | |
246 | assert(argv); | |
247 | ||
601185b4 | 248 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
19adb8a3 ZJS |
249 | switch(c) { |
250 | case 'h': | |
601185b4 ZJS |
251 | help(); |
252 | return 0; /* done */ | |
19adb8a3 ZJS |
253 | |
254 | case ARG_VERSION: | |
3f6fd1ba | 255 | return version(); |
19adb8a3 ZJS |
256 | |
257 | case '?': | |
258 | return -EINVAL; | |
259 | ||
260 | default: | |
eb9da376 | 261 | assert_not_reached("Unhandled option"); |
19adb8a3 ZJS |
262 | } |
263 | ||
264 | if (argc - optind != 1) { | |
265 | log_error("Usage: %s COMMAND", | |
266 | program_invocation_short_name); | |
267 | return -EINVAL; | |
268 | } | |
269 | ||
270 | arg_verb = argv[optind]; | |
6edd7d0a | 271 | |
19adb8a3 ZJS |
272 | if (!streq(arg_verb, "suspend") && |
273 | !streq(arg_verb, "hibernate") && | |
c58493c0 | 274 | !streq(arg_verb, "hybrid-sleep") && |
e68c79db | 275 | !streq(arg_verb, "suspend-then-hibernate")) { |
19adb8a3 ZJS |
276 | log_error("Unknown command '%s'.", arg_verb); |
277 | return -EINVAL; | |
278 | } | |
279 | ||
280 | return 1 /* work to do */; | |
281 | } | |
282 | ||
283 | int main(int argc, char *argv[]) { | |
284 | _cleanup_strv_free_ char **modes = NULL, **states = NULL; | |
c58493c0 | 285 | usec_t delay = 0; |
19adb8a3 ZJS |
286 | int r; |
287 | ||
288 | log_set_target(LOG_TARGET_AUTO); | |
289 | log_parse_environment(); | |
290 | log_open(); | |
291 | ||
292 | r = parse_argv(argc, argv); | |
293 | if (r <= 0) | |
294 | goto finish; | |
295 | ||
c58493c0 | 296 | r = parse_sleep_config(arg_verb, &modes, &states, &delay); |
19adb8a3 ZJS |
297 | if (r < 0) |
298 | goto finish; | |
299 | ||
e68c79db | 300 | if (streq(arg_verb, "suspend-then-hibernate")) |
c58493c0 ML |
301 | r = execute_s2h(delay); |
302 | else | |
303 | r = execute(modes, states); | |
19adb8a3 ZJS |
304 | finish: |
305 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
6edd7d0a | 306 | } |