src/sleep/sleep.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 /***
   3   Copyright © 2010-2017 Canonical
   4   Copyright © 2018 Dell Inc.
   5 ***/
   6
   7 #include <errno.h>
   8 #include <fcntl.h>
   9 #include <getopt.h>
  10 #include <linux/fiemap.h>
  11 #include <poll.h>
  12 #include <sys/stat.h>
  13 #include <sys/types.h>
  14 #include <sys/timerfd.h>
  15 #include <sys/utsname.h>
  16 #include <unistd.h>
  17
  18 #include "sd-bus.h"
  19 #include "sd-device.h"
  20 #include "sd-id128.h"
  21 #include "sd-messages.h"
  22
  23 #include "battery-util.h"
  24 #include "btrfs-util.h"
  25 #include "build.h"
  26 #include "bus-error.h"
  27 #include "bus-locator.h"
  28 #include "bus-util.h"
  29 #include "constants.h"
  30 #include "devnum-util.h"
  31 #include "efivars.h"
  32 #include "exec-util.h"
  33 #include "fd-util.h"
  34 #include "fileio.h"
  35 #include "format-util.h"
  36 #include "id128-util.h"
  37 #include "io-util.h"
  38 #include "json.h"
  39 #include "log.h"
  40 #include "main-func.h"
  41 #include "os-util.h"
  42 #include "parse-util.h"
  43 #include "pretty-print.h"
  44 #include "sleep-util.h"
  45 #include "special.h"
  46 #include "stdio-util.h"
  47 #include "string-util.h"
  48 #include "strv.h"
  49 #include "time-util.h"
  50
  51 #define DEFAULT_HIBERNATE_DELAY_USEC_NO_BATTERY (2 * USEC_PER_HOUR)
  52
  53 static SleepOperation arg_operation = _SLEEP_OPERATION_INVALID;
  54
  55 static int write_efi_hibernate_location(const HibernateLocation *hibernate_location, bool required) {
  56         int log_level = required ? LOG_ERR : LOG_DEBUG,
  57             log_level_ignore = required ? LOG_WARNING : LOG_DEBUG;
  58
  59 #if ENABLE_EFI
  60         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
  61         _cleanup_free_ char *formatted = NULL, *id = NULL, *image_id = NULL,
  62                        *version_id = NULL, *image_version = NULL;
  63         _cleanup_(sd_device_unrefp) sd_device *device = NULL;
  64         const char *uuid_str;
  65         sd_id128_t uuid;
  66         struct utsname uts = {};
  67         int r;
  68
  69         assert(hibernate_location);
  70         assert(hibernate_location->swap);
  71
  72         if (!is_efi_boot())
  73                 return log_full_errno(log_level, SYNTHETIC_ERRNO(EOPNOTSUPP),
  74                                       "Not an EFI boot, passing HibernateLocation via EFI variable is not possible.");
  75
  76         r = sd_device_new_from_devnum(&device, 'b', hibernate_location->devno);
  77         if (r < 0)
  78                 return log_full_errno(log_level, r, "Failed to create sd-device object for '%s': %m",
  79                                       hibernate_location->swap->path);
  80
  81         r = sd_device_get_property_value(device, "ID_FS_UUID", &uuid_str);
  82         if (r < 0)
  83                 return log_full_errno(log_level, r, "Failed to get filesystem UUID for device '%s': %m",
  84                                       hibernate_location->swap->path);
  85
  86         r = sd_id128_from_string(uuid_str, &uuid);
  87         if (r < 0)
  88                 return log_full_errno(log_level, r, "Failed to parse ID_FS_UUID '%s' for device '%s': %m",
  89                                       uuid_str, hibernate_location->swap->path);
  90
  91         if (uname(&uts) < 0)
  92                 log_full_errno(log_level_ignore, errno, "Failed to get kernel info, ignoring: %m");
  93
  94         r = parse_os_release(NULL,
  95                              "ID", &id,
  96                              "IMAGE_ID", &image_id,
  97                              "VERSION_ID", &version_id,
  98                              "IMAGE_VERSION", &image_version);
  99         if (r < 0)
 100                 log_full_errno(log_level_ignore, r, "Failed to parse os-release, ignoring: %m");
 101
 102         r = json_build(&v, JSON_BUILD_OBJECT(
 103                                JSON_BUILD_PAIR_UUID("uuid", uuid),
 104                                JSON_BUILD_PAIR_UNSIGNED("offset", hibernate_location->offset),
 105                                JSON_BUILD_PAIR_CONDITION(!isempty(uts.release), "kernelVersion", JSON_BUILD_STRING(uts.release)),
 106                                JSON_BUILD_PAIR_CONDITION(id, "osReleaseId", JSON_BUILD_STRING(id)),
 107                                JSON_BUILD_PAIR_CONDITION(image_id, "osReleaseImageId", JSON_BUILD_STRING(image_id)),
 108                                JSON_BUILD_PAIR_CONDITION(version_id, "osReleaseVersionId", JSON_BUILD_STRING(version_id)),
 109                                JSON_BUILD_PAIR_CONDITION(image_version, "osReleaseImageVersion", JSON_BUILD_STRING(image_version))));
 110         if (r < 0)
 111                 return log_full_errno(log_level, r, "Failed to build JSON object: %m");
 112
 113         r = json_variant_format(v, 0, &formatted);
 114         if (r < 0)
 115                 return log_full_errno(log_level, r, "Failed to format JSON object: %m");
 116
 117         r = efi_set_variable_string(EFI_SYSTEMD_VARIABLE(HibernateLocation), formatted);
 118         if (r < 0)
 119                 return log_full_errno(log_level, r, "Failed to set EFI variable HibernateLocation: %m");
 120
 121         log_debug("Set EFI variable HibernateLocation to '%s'.", formatted);
 122         return 0;
 123 #else
 124         return log_full_errno(log_level, SYNTHETIC_ERRNO(EOPNOTSUPP),
 125                               "EFI support not enabled, passing HibernateLocation via EFI variable is not possible.");
 126 #endif
 127 }
 128
 129 static int write_kernel_hibernate_location(const HibernateLocation *hibernate_location) {
 130         assert(hibernate_location);
 131         assert(hibernate_location->swap);
 132         assert(IN_SET(hibernate_location->swap->type, SWAP_BLOCK, SWAP_FILE));
 133
 134         return write_resume_config(hibernate_location->devno, hibernate_location->offset, hibernate_location->swap->path);
 135 }
 136
 137 static int write_mode(char **modes) {
 138         int r = 0;
 139
 140         STRV_FOREACH(mode, modes) {
 141                 int k;
 142
 143                 k = write_string_file("/sys/power/disk", *mode, WRITE_STRING_FILE_DISABLE_BUFFER);
 144                 if (k >= 0)
 145                         return 0;
 146
 147                 log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", *mode);
 148                 if (r >= 0)
 149                         r = k;
 150         }
 151
 152         return r;
 153 }
 154
 155 static int write_state(FILE **f, char **states) {
 156         int r = 0;
 157
 158         assert(f);
 159         assert(*f);
 160
 161         STRV_FOREACH(state, states) {
 162                 int k;
 163
 164                 k = write_string_stream(*f, *state, WRITE_STRING_FILE_DISABLE_BUFFER);
 165                 if (k >= 0)
 166                         return 0;
 167                 log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m", *state);
 168                 if (r >= 0)
 169                         r = k;
 170
 171                 fclose(*f);
 172                 *f = fopen("/sys/power/state", "we");
 173                 if (!*f)
 174                         return -errno;
 175         }
 176
 177         return r;
 178 }
 179
 180 static int lock_all_homes(void) {
 181         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 182         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
 183         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
 184         int r;
 185
 186         /* Let's synchronously lock all home directories managed by homed that have been marked for it. This
 187          * way the key material required to access these volumes is hopefully removed from memory. */
 188
 189         r = sd_bus_open_system(&bus);
 190         if (r < 0)
 191                 return log_warning_errno(r, "Failed to connect to system bus, ignoring: %m");
 192
 193         r = bus_message_new_method_call(bus, &m, bus_home_mgr, "LockAllHomes");
 194         if (r < 0)
 195                 return bus_log_create_error(r);
 196
 197         /* If homed is not running it can't have any home directories active either. */
 198         r = sd_bus_message_set_auto_start(m, false);
 199         if (r < 0)
 200                 return log_error_errno(r, "Failed to disable auto-start of LockAllHomes() message: %m");
 201
 202         r = sd_bus_call(bus, m, DEFAULT_TIMEOUT_USEC, &error, NULL);
 203         if (r < 0) {
 204                 if (!bus_error_is_unknown_service(&error))
 205                         return log_error_errno(r, "Failed to lock home directories: %s", bus_error_message(&error, r));
 206
 207                 log_debug("systemd-homed is not running, locking of home directories skipped.");
 208         } else
 209                 log_debug("Successfully requested locking of all home directories.");
 210         return 0;
 211 }
 212
 213 static int execute(
 214                 const SleepConfig *sleep_config,
 215                 SleepOperation operation,
 216                 const char *action) {
 217
 218         char *arguments[] = {
 219                 NULL,
 220                 (char*) "pre",
 221                 /* NB: we use 'arg_operation' instead of 'operation' here, as we want to communicate the overall
 222                  * operation here, not the specific one, in case of s2h. */
 223                 (char*) sleep_operation_to_string(arg_operation),
 224                 NULL
 225         };
 226         static const char* const dirs[] = {
 227                 SYSTEM_SLEEP_PATH,
 228                 NULL
 229         };
 230
 231         _cleanup_(hibernate_location_freep) HibernateLocation *hibernate_location = NULL;
 232         _cleanup_fclose_ FILE *f = NULL;
 233         char **modes, **states;
 234         int r;
 235
 236         assert(sleep_config);
 237         assert(operation >= 0);
 238         assert(operation < _SLEEP_OPERATION_MAX);
 239         assert(operation != SLEEP_SUSPEND_THEN_HIBERNATE); /* Handled by execute_s2h() instead */
 240
 241         states = sleep_config->states[operation];
 242         modes = sleep_config->modes[operation];
 243
 244         if (strv_isempty(states))
 245                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 246                                        "No sleep states configured for sleep operation %s, can't sleep.",
 247                                        sleep_operation_to_string(operation));
 248
 249         /* This file is opened first, so that if we hit an error,
 250          * we can abort before modifying any state. */
 251         f = fopen("/sys/power/state", "we");
 252         if (!f)
 253                 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
 254
 255         setvbuf(f, NULL, _IONBF, 0);
 256
 257         /* Configure hibernation settings if we are supposed to hibernate */
 258         if (!strv_isempty(modes)) {
 259                 bool resume_set;
 260
 261                 r = find_hibernate_location(&hibernate_location);
 262                 if (r < 0)
 263                         return log_error_errno(r, "Failed to find location to hibernate to: %m");
 264                 resume_set = r > 0;
 265
 266                 if (!resume_set) {
 267                         r = write_kernel_hibernate_location(hibernate_location);
 268                         if (r < 0)
 269                                 return log_error_errno(r, "Failed to prepare for hibernation: %m");
 270                 }
 271
 272                 r = write_efi_hibernate_location(hibernate_location, !resume_set);
 273                 if (r < 0 && !resume_set)
 274                         return r;
 275
 276                 r = write_mode(modes);
 277                 if (r < 0)
 278                         return log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
 279         }
 280
 281         /* Pass an action string to the call-outs. This is mostly our operation string, except if the
 282          * hibernate step of s-t-h fails, in which case we communicate that with a separate action. */
 283         if (!action)
 284                 action = sleep_operation_to_string(operation);
 285
 286         r = setenv("SYSTEMD_SLEEP_ACTION", action, 1);
 287         if (r != 0)
 288                 log_warning_errno(errno, "Error setting SYSTEMD_SLEEP_ACTION=%s, ignoring: %m", action);
 289
 290         (void) execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
 291         (void) lock_all_homes();
 292
 293         log_struct(LOG_INFO,
 294                    "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
 295                    LOG_MESSAGE("Entering sleep state '%s'...", sleep_operation_to_string(operation)),
 296                    "SLEEP=%s", sleep_operation_to_string(arg_operation));
 297
 298         r = write_state(&f, states);
 299         if (r < 0)
 300                 log_struct_errno(LOG_ERR, r,
 301                                  "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
 302                                  LOG_MESSAGE("Failed to put system to sleep. System resumed again: %m"),
 303                                  "SLEEP=%s", sleep_operation_to_string(arg_operation));
 304         else
 305                 log_struct(LOG_INFO,
 306                            "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
 307                            LOG_MESSAGE("System returned from sleep state."),
 308                            "SLEEP=%s", sleep_operation_to_string(arg_operation));
 309
 310         arguments[1] = (char*) "post";
 311         (void) execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
 312
 313         return r;
 314 }
 315
 316 static int custom_timer_suspend(const SleepConfig *sleep_config) {
 317         usec_t hibernate_timestamp;
 318         int r;
 319
 320         assert(sleep_config);
 321
 322         hibernate_timestamp = usec_add(now(CLOCK_BOOTTIME), sleep_config->hibernate_delay_usec);
 323
 324         while (battery_is_discharging_and_low() == 0) {
 325                 _cleanup_hashmap_free_ Hashmap *last_capacity = NULL, *current_capacity = NULL;
 326                 _cleanup_close_ int tfd = -EBADF;
 327                 struct itimerspec ts = {};
 328                 usec_t suspend_interval;
 329                 bool woken_by_timer;
 330
 331                 tfd = timerfd_create(CLOCK_BOOTTIME_ALARM, TFD_NONBLOCK|TFD_CLOEXEC);
 332                 if (tfd < 0)
 333                         return log_error_errno(errno, "Error creating timerfd: %m");
 334
 335                 /* Store current battery capacity before suspension */
 336                 r = fetch_batteries_capacity_by_name(&last_capacity);
 337                 if (r < 0)
 338                         return log_error_errno(r, "Error fetching battery capacity percentage: %m");
 339
 340                 if (hashmap_isempty(last_capacity))
 341                         /* In case of no battery, system suspend interval will be set to HibernateDelaySec= or 2 hours. */
 342                         suspend_interval = timestamp_is_set(hibernate_timestamp)
 343                                            ? sleep_config->hibernate_delay_usec : DEFAULT_HIBERNATE_DELAY_USEC_NO_BATTERY;
 344                 else {
 345                         r = get_total_suspend_interval(last_capacity, &suspend_interval);
 346                         if (r < 0) {
 347                                 log_debug_errno(r, "Failed to estimate suspend interval using previous discharge rate, ignoring: %m");
 348                                 /* In case of any errors, especially when we do not know the battery
 349                                  * discharging rate, system suspend interval will be set to
 350                                  * SuspendEstimationSec=. */
 351                                 suspend_interval = sleep_config->suspend_estimation_usec;
 352                         }
 353                 }
 354
 355                 /* Do not suspend more than HibernateDelaySec= */
 356                 usec_t before_timestamp = now(CLOCK_BOOTTIME);
 357                 suspend_interval = MIN(suspend_interval, usec_sub_unsigned(hibernate_timestamp, before_timestamp));
 358                 if (suspend_interval <= 0)
 359                         break; /* system should hibernate */
 360
 361                 log_debug("Set timerfd wake alarm for %s", FORMAT_TIMESPAN(suspend_interval, USEC_PER_SEC));
 362                 /* Wake alarm for system with or without battery to hibernate or estimate discharge rate whichever is applicable */
 363                 timespec_store(&ts.it_value, suspend_interval);
 364
 365                 if (timerfd_settime(tfd, 0, &ts, NULL) < 0)
 366                         return log_error_errno(errno, "Error setting battery estimate timer: %m");
 367
 368                 r = execute(sleep_config, SLEEP_SUSPEND, NULL);
 369                 if (r < 0)
 370                         return r;
 371
 372                 r = fd_wait_for_event(tfd, POLLIN, 0);
 373                 if (r < 0)
 374                         return log_error_errno(r, "Error polling timerfd: %m");
 375                 /* Store fd_wait status */
 376                 woken_by_timer = FLAGS_SET(r, POLLIN);
 377
 378                 r = fetch_batteries_capacity_by_name(&current_capacity);
 379                 if (r < 0 || hashmap_isempty(current_capacity)) {
 380                         /* In case of no battery or error while getting charge level, no need to measure
 381                          * discharge rate. Instead the system should wake up if it is manual wakeup or
 382                          * hibernate if this is a timer wakeup. */
 383                         if (r < 0)
 384                                 log_debug_errno(r, "Battery capacity percentage unavailable, cannot estimate discharge rate: %m");
 385                         else
 386                                 log_debug("No battery found.");
 387                         if (!woken_by_timer)
 388                                 return 0;
 389                         break;
 390                 }
 391
 392                 usec_t after_timestamp = now(CLOCK_BOOTTIME);
 393                 log_debug("Attempting to estimate battery discharge rate after wakeup from %s sleep",
 394                           FORMAT_TIMESPAN(after_timestamp - before_timestamp, USEC_PER_HOUR));
 395
 396                 if (after_timestamp != before_timestamp) {
 397                         r = estimate_battery_discharge_rate_per_hour(last_capacity, current_capacity, before_timestamp, after_timestamp);
 398                         if (r < 0)
 399                                 log_warning_errno(r, "Failed to estimate and update battery discharge rate, ignoring: %m");
 400                 } else
 401                         log_debug("System woke up too early to estimate discharge rate");
 402
 403                 if (!woken_by_timer)
 404                         /* Return as manual wakeup done. This also will return in case battery was charged during suspension */
 405                         return 0;
 406
 407                 r = check_wakeup_type();
 408                 if (r < 0)
 409                         log_debug_errno(r, "Failed to check hardware wakeup type, ignoring: %m");
 410                 if (r > 0) {
 411                         log_debug("wakeup type is APM timer");
 412                         /* system should hibernate */
 413                         break;
 414                 }
 415         }
 416
 417         return 1;
 418 }
 419
 420 /* Freeze when invoked and thaw on cleanup */
 421 static int freeze_thaw_user_slice(const char **method) {
 422         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 423         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
 424         int r;
 425
 426         if (!method || !*method)
 427                 return 0;
 428
 429         r = bus_connect_system_systemd(&bus);
 430         if (r < 0)
 431                 return log_debug_errno(r, "Failed to open connection to systemd: %m");
 432
 433         (void) sd_bus_set_method_call_timeout(bus, FREEZE_TIMEOUT);
 434
 435         r = bus_call_method(bus, bus_systemd_mgr, *method, &error, NULL, "s", SPECIAL_USER_SLICE);
 436         if (r < 0)
 437                 return log_debug_errno(r, "Failed to execute operation: %s", bus_error_message(&error, r));
 438
 439         return 1;
 440 }
 441
 442 static int execute_s2h(const SleepConfig *sleep_config) {
 443         _unused_ _cleanup_(freeze_thaw_user_slice) const char *auto_method_thaw = "ThawUnit";
 444         int r;
 445
 446         assert(sleep_config);
 447
 448         r = freeze_thaw_user_slice(&(const char*) { "FreezeUnit" });
 449         if (r < 0)
 450                 log_debug_errno(r, "Failed to freeze unit user.slice, ignoring: %m");
 451
 452         /* Only check if we have automated battery alarms if HibernateDelaySec= is not set, as in that case
 453          * we'll busy poll for the configured interval instead */
 454         if (!timestamp_is_set(sleep_config->hibernate_delay_usec)) {
 455                 r = check_wakeup_type();
 456                 if (r < 0)
 457                         log_debug_errno(r, "Failed to check hardware wakeup type, ignoring: %m");
 458                 else {
 459                         r = battery_trip_point_alarm_exists();
 460                         if (r < 0)
 461                                 log_debug_errno(r, "Failed to check whether acpi_btp support is enabled or not, ignoring: %m");
 462                 }
 463         } else
 464                 r = 0;  /* Force fallback path */
 465
 466         if (r > 0) { /* If we have both wakeup alarms and battery trip point support, use them */
 467                 log_debug("Attempting to suspend...");
 468                 r = execute(sleep_config, SLEEP_SUSPEND, NULL);
 469                 if (r < 0)
 470                         return r;
 471
 472                 r = check_wakeup_type();
 473                 if (r < 0)
 474                         return log_debug_errno(r, "Failed to check hardware wakeup type: %m");
 475
 476                 if (r == 0)
 477                         /* For APM Timer wakeup, system should hibernate else wakeup */
 478                         return 0;
 479         } else {
 480                 r = custom_timer_suspend(sleep_config);
 481                 if (r < 0)
 482                         return log_debug_errno(r, "Suspend cycle with manual battery discharge rate estimation failed: %m");
 483                 if (r == 0)
 484                         /* manual wakeup */
 485                         return 0;
 486         }
 487         /* For above custom timer, if 1 is returned, system will directly hibernate */
 488
 489         log_debug("Attempting to hibernate");
 490         r = execute(sleep_config, SLEEP_HIBERNATE, NULL);
 491         if (r < 0) {
 492                 log_notice("Couldn't hibernate, will try to suspend again.");
 493
 494                 r = execute(sleep_config, SLEEP_SUSPEND, "suspend-after-failed-hibernate");
 495                 if (r < 0)
 496                         return r;
 497         }
 498
 499         return 0;
 500 }
 501
 502 static int help(void) {
 503         _cleanup_free_ char *link = NULL;
 504         int r;
 505
 506         r = terminal_urlify_man("systemd-suspend.service", "8", &link);
 507         if (r < 0)
 508                 return log_oom();
 509
 510         printf("%s COMMAND\n\n"
 511                "Suspend the system, hibernate the system, or both.\n\n"
 512                "  -h --help              Show this help and exit\n"
 513                "  --version              Print version string and exit\n"
 514                "\nCommands:\n"
 515                "  suspend                Suspend the system\n"
 516                "  hibernate              Hibernate the system\n"
 517                "  hybrid-sleep           Both hibernate and suspend the system\n"
 518                "  suspend-then-hibernate Initially suspend and then hibernate\n"
 519                "                         the system after a fixed period of time\n"
 520                "\nSee the %s for details.\n",
 521                program_invocation_short_name,
 522                link);
 523
 524         return 0;
 525 }
 526
 527 static int parse_argv(int argc, char *argv[]) {
 528         enum {
 529                 ARG_VERSION = 0x100,
 530         };
 531
 532         static const struct option options[] = {
 533                 { "help",         no_argument,       NULL, 'h'           },
 534                 { "version",      no_argument,       NULL, ARG_VERSION   },
 535                 {}
 536         };
 537
 538         int c;
 539
 540         assert(argc >= 0);
 541         assert(argv);
 542
 543         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 544                 switch (c) {
 545                 case 'h':
 546                         return help();
 547
 548                 case ARG_VERSION:
 549                         return version();
 550
 551                 case '?':
 552                         return -EINVAL;
 553
 554                 default:
 555                         assert_not_reached();
 556                 }
 557
 558         if (argc - optind != 1)
 559                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 560                                        "Usage: %s COMMAND",
 561                                        program_invocation_short_name);
 562
 563         arg_operation = sleep_operation_from_string(argv[optind]);
 564         if (arg_operation < 0)
 565                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown command '%s'.", argv[optind]);
 566
 567         return 1 /* work to do */;
 568 }
 569
 570 static int run(int argc, char *argv[]) {
 571         _cleanup_(free_sleep_configp) SleepConfig *sleep_config = NULL;
 572         int r;
 573
 574         log_setup();
 575
 576         r = parse_argv(argc, argv);
 577         if (r <= 0)
 578                 return r;
 579
 580         r = parse_sleep_config(&sleep_config);
 581         if (r < 0)
 582                 return r;
 583
 584         if (!sleep_config->allow[arg_operation])
 585                 return log_error_errno(SYNTHETIC_ERRNO(EACCES),
 586                                        "Sleep operation \"%s\" is disabled by configuration, refusing.",
 587                                        sleep_operation_to_string(arg_operation));
 588
 589         switch (arg_operation) {
 590
 591         case SLEEP_SUSPEND_THEN_HIBERNATE:
 592                 r = execute_s2h(sleep_config);
 593                 break;
 594
 595         case SLEEP_HYBRID_SLEEP:
 596                 r = execute(sleep_config, SLEEP_HYBRID_SLEEP, NULL);
 597                 if (r < 0) {
 598                         /* If we can't hybrid sleep, then let's try to suspend at least. After all, the user
 599                          * asked us to do both: suspend + hibernate, and it's almost certainly the
 600                          * hibernation that failed, hence still do the other thing, the suspend. */
 601
 602                         log_notice("Couldn't hybrid sleep, will try to suspend instead.");
 603
 604                         r = execute(sleep_config, SLEEP_SUSPEND, "suspend-after-failed-hybrid-sleep");
 605                 }
 606
 607                 break;
 608
 609         default:
 610                 r = execute(sleep_config, arg_operation, NULL);
 611                 break;
 612         }
 613
 614         return r;
 615 }
 616
 617 DEFINE_MAIN_FUNCTION(run);