]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/sleep/sleep.c
Merge pull request #9176 from keszybz/flags-set
[thirdparty/systemd.git] / src / sleep / sleep.c
CommitLineData
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
17c40b3a 7 Copyright 2010-2017 Canonical
c58493c0 8 Copyright 2018 Dell Inc.
6edd7d0a
LP
9***/
10
6edd7d0a 11#include <errno.h>
19adb8a3 12#include <getopt.h>
17c40b3a 13#include <linux/fiemap.h>
3f6fd1ba 14#include <stdio.h>
6edd7d0a 15
aa62a893 16#include "sd-messages.h"
3f6fd1ba 17
c58493c0 18#include "parse-util.h"
3f6fd1ba 19#include "def.h"
89711996 20#include "exec-util.h"
3ffd4af2 21#include "fd-util.h"
a5c32cff 22#include "fileio.h"
3f6fd1ba 23#include "log.h"
19adb8a3 24#include "sleep-config.h"
c58493c0 25#include "stdio-util.h"
07630cea 26#include "string-util.h"
3f6fd1ba
LP
27#include "strv.h"
28#include "util.h"
19adb8a3
ZJS
29
30static char* arg_verb = NULL;
31
17c40b3a
ML
32static int write_hibernate_location_info(void) {
33 _cleanup_free_ char *device = NULL, *type = NULL;
34 _cleanup_free_ struct fiemap *fiemap = NULL;
35 char offset_str[DECIMAL_STR_MAX(uint64_t)];
36 char device_str[DECIMAL_STR_MAX(uint64_t)];
37 _cleanup_close_ int fd = -1;
38 struct stat stb;
39 uint64_t offset;
40 int r;
41
42 r = find_hibernate_location(&device, &type, NULL, NULL);
43 if (r < 0)
44 return log_debug_errno(r, "Unable to find hibernation location: %m");
45
46 /* if it's a swap partition, we just write the disk to /sys/power/resume */
47 if (streq(type, "partition"))
48 return write_string_file("/sys/power/resume", device, 0);
49 else if (!streq(type, "file"))
50 return log_debug_errno(EINVAL, "Invalid hibernate type %s: %m",
51 type);
52
53 /* Only available in 4.17+ */
54 if (access("/sys/power/resume_offset", F_OK) < 0) {
55 if (errno == ENOENT)
56 return 0;
57 return log_debug_errno(errno, "/sys/power/resume_offset unavailable: %m");
58 }
59
60 r = access("/sys/power/resume_offset", W_OK);
61 if (r < 0)
62 return log_debug_errno(errno, "/sys/power/resume_offset not writeable: %m");
63
64 fd = open(device, O_RDONLY | O_CLOEXEC | O_NONBLOCK);
65 if (fd < 0)
66 return log_debug_errno(errno, "Unable to open '%s': %m", device);
67 r = fstat(fd, &stb);
68 if (r < 0)
69 return log_debug_errno(errno, "Unable to stat %s: %m", device);
70 r = read_fiemap(fd, &fiemap);
71 if (r < 0)
72 return log_debug_errno(r, "Unable to read extent map for '%s': %m",
73 device);
74 if (fiemap->fm_mapped_extents == 0) {
75 log_debug("No extents found in '%s'", device);
76 return -EINVAL;
77 }
78 offset = fiemap->fm_extents[0].fe_physical / page_size();
79 xsprintf(offset_str, "%" PRIu64, offset);
80 r = write_string_file("/sys/power/resume_offset", offset_str, 0);
81 if (r < 0)
82 return log_debug_errno(r, "Failed to write offset '%s': %m",
83 offset_str);
84
85 xsprintf(device_str, "%lx", (unsigned long)stb.st_dev);
86 r = write_string_file("/sys/power/resume", device_str, 0);
87 if (r < 0)
88 return log_debug_errno(r, "Failed to write device '%s': %m",
89 device_str);
90 return 0;
91}
92
19adb8a3
ZJS
93static int write_mode(char **modes) {
94 int r = 0;
95 char **mode;
96
97 STRV_FOREACH(mode, modes) {
aa62a893
LP
98 int k;
99
4c1fc3e4 100 k = write_string_file("/sys/power/disk", *mode, 0);
19adb8a3
ZJS
101 if (k == 0)
102 return 0;
aa62a893 103
c33b3297
MS
104 log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
105 *mode);
19adb8a3
ZJS
106 if (r == 0)
107 r = k;
108 }
6edd7d0a 109
19adb8a3
ZJS
110 return r;
111}
6edd7d0a 112
2fd069b1 113static int write_state(FILE **f, char **states) {
19adb8a3
ZJS
114 char **state;
115 int r = 0;
116
117 STRV_FOREACH(state, states) {
118 int k;
119
b1837133 120 k = write_string_stream(*f, *state, 0);
19adb8a3
ZJS
121 if (k == 0)
122 return 0;
c33b3297
MS
123 log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
124 *state);
19adb8a3
ZJS
125 if (r == 0)
126 r = k;
127
2fd069b1
ZJS
128 fclose(*f);
129 *f = fopen("/sys/power/state", "we");
4a62c710 130 if (!*f)
0ca906ac 131 return -errno;
6edd7d0a
LP
132 }
133
19adb8a3
ZJS
134 return r;
135}
6edd7d0a 136
19adb8a3 137static int execute(char **modes, char **states) {
e2cc6eca
LP
138
139 char *arguments[] = {
140 NULL,
141 (char*) "pre",
142 arg_verb,
143 NULL
144 };
b5084605
LP
145 static const char* const dirs[] = {
146 SYSTEM_SLEEP_PATH,
147 NULL
148 };
e2cc6eca 149
19adb8a3 150 int r;
2fd069b1 151 _cleanup_fclose_ FILE *f = NULL;
6524990f 152
19adb8a3 153 /* This file is opened first, so that if we hit an error,
09692409 154 * we can abort before modifying any state. */
6edd7d0a 155 f = fopen("/sys/power/state", "we");
4a62c710
MS
156 if (!f)
157 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
6edd7d0a 158
19adb8a3 159 /* Configure the hibernation mode */
17c40b3a
ML
160 if (!strv_isempty(modes)) {
161 r = write_hibernate_location_info();
162 if (r < 0)
163 return log_error_errno(r, "Failed to write hibernation disk offset: %m");
164 r = write_mode(modes);
165 if (r < 0)
0ca906ac 166 return log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");;
17c40b3a 167 }
19adb8a3 168
c6e47247 169 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments);
6edd7d0a 170
19adb8a3 171 log_struct(LOG_INFO,
2b044526 172 "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
e2cc6eca
LP
173 LOG_MESSAGE("Suspending system..."),
174 "SLEEP=%s", arg_verb,
19adb8a3
ZJS
175 NULL);
176
2fd069b1 177 r = write_state(&f, states);
19adb8a3 178 if (r < 0)
0ca906ac 179 return log_error_errno(r, "Failed to write /sys/power/state: %m");
19adb8a3
ZJS
180
181 log_struct(LOG_INFO,
2b044526 182 "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
a5ccdb98 183 LOG_MESSAGE("System resumed."),
e2cc6eca 184 "SLEEP=%s", arg_verb,
19adb8a3 185 NULL);
eb267289 186
6edd7d0a 187 arguments[1] = (char*) "post";
c6e47247 188 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments);
6edd7d0a 189
19adb8a3
ZJS
190 return r;
191}
6edd7d0a 192
c58493c0
ML
193static int read_wakealarm(uint64_t *result) {
194 _cleanup_free_ char *t = NULL;
195
196 if (read_one_line_file("/sys/class/rtc/rtc0/since_epoch", &t) >= 0)
197 return safe_atou64(t, result);
198 return -EBADF;
199}
200
201static int write_wakealarm(const char *str) {
202
203 _cleanup_fclose_ FILE *f = NULL;
204 int r;
205
206 f = fopen("/sys/class/rtc/rtc0/wakealarm", "we");
207 if (!f)
208 return log_error_errno(errno, "Failed to open /sys/class/rtc/rtc0/wakealarm: %m");
209
210 r = write_string_stream(f, str, 0);
211 if (r < 0)
212 return log_error_errno(r, "Failed to write '%s' to /sys/class/rtc/rtc0/wakealarm: %m", str);
213
214 return 0;
215}
216
217static int execute_s2h(usec_t hibernate_delay_sec) {
218
219 _cleanup_strv_free_ char **hibernate_modes = NULL, **hibernate_states = NULL,
220 **suspend_modes = NULL, **suspend_states = NULL;
221 usec_t orig_time, cmp_time;
222 char time_str[DECIMAL_STR_MAX(uint64_t)];
223 int r;
224
225 r = parse_sleep_config("suspend", &suspend_modes, &suspend_states,
226 NULL);
227 if (r < 0)
228 return r;
229
230 r = parse_sleep_config("hibernate", &hibernate_modes,
231 &hibernate_states, NULL);
232 if (r < 0)
233 return r;
234
235 r = read_wakealarm(&orig_time);
236 if (r < 0)
237 return log_error_errno(errno, "Failed to read time: %d", r);
238
239 orig_time += hibernate_delay_sec / USEC_PER_SEC;
240 xsprintf(time_str, "%" PRIu64, orig_time);
241
242 r = write_wakealarm(time_str);
243 if (r < 0)
244 return r;
245
246 log_debug("Set RTC wake alarm for %s", time_str);
247
248 r = execute(suspend_modes, suspend_states);
249 if (r < 0)
250 return r;
251
252 r = read_wakealarm(&cmp_time);
253 if (r < 0)
254 return log_error_errno(errno, "Failed to read time: %d", r);
255
256 /* reset RTC */
257 r = write_wakealarm("0");
258 if (r < 0)
259 return r;
260
261 log_debug("Woke up at %"PRIu64, cmp_time);
262
263 /* if woken up after alarm time, hibernate */
264 if (cmp_time >= orig_time)
265 r = execute(hibernate_modes, hibernate_states);
266
267 return r;
268}
269
601185b4 270static void help(void) {
19adb8a3
ZJS
271 printf("%s COMMAND\n\n"
272 "Suspend the system, hibernate the system, or both.\n\n"
273 "Commands:\n"
274 " -h --help Show this help and exit\n"
275 " --version Print version string and exit\n"
276 " suspend Suspend the system\n"
277 " hibernate Hibernate the system\n"
278 " hybrid-sleep Both hibernate and suspend the system\n"
e68c79db 279 " suspend-then-hibernate Initially suspend and then hibernate\n"
c58493c0 280 " the system after a fixed period of time\n"
601185b4 281 , program_invocation_short_name);
19adb8a3 282}
6edd7d0a 283
19adb8a3
ZJS
284static int parse_argv(int argc, char *argv[]) {
285 enum {
286 ARG_VERSION = 0x100,
287 };
288
289 static const struct option options[] = {
290 { "help", no_argument, NULL, 'h' },
291 { "version", no_argument, NULL, ARG_VERSION },
eb9da376 292 {}
19adb8a3
ZJS
293 };
294
295 int c;
296
297 assert(argc >= 0);
298 assert(argv);
299
601185b4 300 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
19adb8a3
ZJS
301 switch(c) {
302 case 'h':
601185b4
ZJS
303 help();
304 return 0; /* done */
19adb8a3
ZJS
305
306 case ARG_VERSION:
3f6fd1ba 307 return version();
19adb8a3
ZJS
308
309 case '?':
310 return -EINVAL;
311
312 default:
eb9da376 313 assert_not_reached("Unhandled option");
19adb8a3
ZJS
314 }
315
316 if (argc - optind != 1) {
317 log_error("Usage: %s COMMAND",
318 program_invocation_short_name);
319 return -EINVAL;
320 }
321
322 arg_verb = argv[optind];
6edd7d0a 323
19adb8a3
ZJS
324 if (!streq(arg_verb, "suspend") &&
325 !streq(arg_verb, "hibernate") &&
c58493c0 326 !streq(arg_verb, "hybrid-sleep") &&
e68c79db 327 !streq(arg_verb, "suspend-then-hibernate")) {
19adb8a3
ZJS
328 log_error("Unknown command '%s'.", arg_verb);
329 return -EINVAL;
330 }
331
332 return 1 /* work to do */;
333}
334
335int main(int argc, char *argv[]) {
336 _cleanup_strv_free_ char **modes = NULL, **states = NULL;
c58493c0 337 usec_t delay = 0;
19adb8a3
ZJS
338 int r;
339
340 log_set_target(LOG_TARGET_AUTO);
341 log_parse_environment();
342 log_open();
343
344 r = parse_argv(argc, argv);
345 if (r <= 0)
346 goto finish;
347
c58493c0 348 r = parse_sleep_config(arg_verb, &modes, &states, &delay);
19adb8a3
ZJS
349 if (r < 0)
350 goto finish;
351
e68c79db 352 if (streq(arg_verb, "suspend-then-hibernate"))
c58493c0
ML
353 r = execute_s2h(delay);
354 else
355 r = execute(modes, states);
19adb8a3
ZJS
356finish:
357 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
6edd7d0a 358}