[systemd.git] / src / sleep / sleep.c

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  Copyright © 2010-2017 Canonical
  Copyright © 2018 Dell Inc.
***/

#include <errno.h>
#include <getopt.h>
#include <linux/fiemap.h>
#include <stdio.h>

#include "sd-messages.h"

#include "def.h"
#include "exec-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "log.h"
#include "main-func.h"
#include "parse-util.h"
#include "pretty-print.h"
#include "sleep-config.h"
#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
#include "util.h"

static char* arg_verb = NULL;

static int write_hibernate_location_info(void) {
        _cleanup_free_ char *device = NULL, *type = NULL;
        _cleanup_free_ struct fiemap *fiemap = NULL;
        char offset_str[DECIMAL_STR_MAX(uint64_t)];
        char device_str[DECIMAL_STR_MAX(uint64_t)];
        _cleanup_close_ int fd = -1;
        struct stat stb;
        uint64_t offset;
        int r;

        r = find_hibernate_location(&device, &type, NULL, NULL);
        if (r < 0)
                return log_debug_errno(r, "Unable to find hibernation location: %m");

        /* if it's a swap partition, we just write the disk to /sys/power/resume */
        if (streq(type, "partition")) {
                r = write_string_file("/sys/power/resume", device, WRITE_STRING_FILE_DISABLE_BUFFER);
                if (r < 0)
                        return log_debug_errno(r, "Faileed to write partitoin device to /sys/power/resume: %m");

                return r;
        }
        if (!streq(type, "file"))
                return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Invalid hibernate type: %s", type);

        /* Only available in 4.17+ */
        if (access("/sys/power/resume_offset", W_OK) < 0) {
                if (errno == ENOENT) {
                        log_debug("Kernel too old, can't configure resume offset, ignoring.");
                        return 0;
                }

                return log_debug_errno(errno, "/sys/power/resume_offset not writeable: %m");
        }

        fd = open(device, O_RDONLY | O_CLOEXEC | O_NONBLOCK);
        if (fd < 0)
                return log_debug_errno(errno, "Unable to open '%s': %m", device);
        r = fstat(fd, &stb);
        if (r < 0)
                return log_debug_errno(errno, "Unable to stat %s: %m", device);

        r = read_fiemap(fd, &fiemap);
        if (r < 0)
                return log_debug_errno(r, "Unable to read extent map for '%s': %m", device);
        if (fiemap->fm_mapped_extents == 0)
                return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "No extents found in '%s'", device);

        offset = fiemap->fm_extents[0].fe_physical / page_size();
        xsprintf(offset_str, "%" PRIu64, offset);
        r = write_string_file("/sys/power/resume_offset", offset_str, WRITE_STRING_FILE_DISABLE_BUFFER);
        if (r < 0)
                return log_debug_errno(r, "Failed to write offset '%s': %m", offset_str);

        xsprintf(device_str, "%lx", (unsigned long)stb.st_dev);
        r = write_string_file("/sys/power/resume", device_str, WRITE_STRING_FILE_DISABLE_BUFFER);
        if (r < 0)
                return log_debug_errno(r, "Failed to write device '%s': %m", device_str);

        return 0;
}

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, WRITE_STRING_FILE_DISABLE_BUFFER);
                if (k >= 0)
                        return 0;

                log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", *mode);
                if (r >= 0)
                        r = k;
        }

        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, WRITE_STRING_FILE_DISABLE_BUFFER);
                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 -errno;
        }

        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");

        setvbuf(f, NULL, _IONBF, 0);

        /* Configure the hibernation mode */
        if (!strv_isempty(modes)) {
                r = write_hibernate_location_info();
                if (r < 0)
                        return log_error_errno(r, "Failed to write hibernation disk offset: %m");
                r = write_mode(modes);
                if (r < 0)
                        return log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");;
        }

        execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL);

        log_struct(LOG_INFO,
                   "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
                   LOG_MESSAGE("Suspending system..."),
                   "SLEEP=%s", arg_verb);

        r = write_state(&f, states);
        if (r < 0)
                log_struct_errno(LOG_ERR, r,
                                 "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
                                 LOG_MESSAGE("Failed to suspend system. System resumed again: %m"),
                                 "SLEEP=%s", arg_verb);
        else
                log_struct(LOG_INFO,
                           "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
                           LOG_MESSAGE("System resumed."),
                           "SLEEP=%s", arg_verb);

        arguments[1] = (char*) "post";
        execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL);

        return r;
}

static int rtc_read_time(uint64_t *ret_sec) {
        _cleanup_free_ char *t = NULL;
        int r;

        r = read_one_line_file("/sys/class/rtc/rtc0/since_epoch", &t);
        if (r < 0)
                return log_error_errno(r, "Failed to read RTC time: %m");

        r = safe_atou64(t, ret_sec);
        if (r < 0)
                return log_error_errno(r, "Failed to parse RTC time '%s': %m", t);

        return 0;
}

static int rtc_write_wake_alarm(uint64_t sec) {
        char buf[DECIMAL_STR_MAX(uint64_t)];
        int r;

        xsprintf(buf, "%" PRIu64, sec);

        r = write_string_file("/sys/class/rtc/rtc0/wakealarm", buf, WRITE_STRING_FILE_DISABLE_BUFFER);
        if (r < 0)
                return log_error_errno(r, "Failed to write '%s' to /sys/class/rtc/rtc0/wakealarm: %m", buf);

        return 0;
}

static int execute_s2h(usec_t hibernate_delay_sec) {

        _cleanup_strv_free_ char **hibernate_modes = NULL, **hibernate_states = NULL,
                                 **suspend_modes = NULL, **suspend_states = NULL;
        usec_t original_time, wake_time, cmp_time;
        int r;

        r = parse_sleep_config("suspend", NULL, &suspend_modes, &suspend_states, NULL);
        if (r < 0)
                return r;

        r = parse_sleep_config("hibernate", NULL, &hibernate_modes, &hibernate_states, NULL);
        if (r < 0)
                return r;

        r = rtc_read_time(&original_time);
        if (r < 0)
                return r;

        wake_time = original_time + DIV_ROUND_UP(hibernate_delay_sec, USEC_PER_SEC);
        r = rtc_write_wake_alarm(wake_time);
        if (r < 0)
                return r;

        log_debug("Set RTC wake alarm for %" PRIu64, wake_time);

        r = execute(suspend_modes, suspend_states);
        if (r < 0)
                return r;

        /* Reset RTC right-away */
        r = rtc_write_wake_alarm(0);
        if (r < 0)
                return r;

        r = rtc_read_time(&cmp_time);
        if (r < 0)
                return r;

        log_debug("Woke up at %"PRIu64, cmp_time);

        if (cmp_time < wake_time) /* We woke up before the alarm time, we are done. */
                return 0;

        /* If woken up after alarm time, hibernate */
        r = execute(hibernate_modes, hibernate_states);
        if (r < 0) {
                log_notice("Couldn't hibernate, will try to suspend again.");
                r = execute(suspend_modes, suspend_states);
                if (r < 0) {
                        log_notice("Could neither hibernate nor suspend again, giving up.");
                        return r;
                }
        }

        return 0;
}

static int help(void) {
        _cleanup_free_ char *link = NULL;
        int r;

        r = terminal_urlify_man("systemd-suspend.service", "8", &link);
        if (r < 0)
                return log_oom();

        printf("%s COMMAND\n\n"
               "Suspend the system, hibernate the system, or both.\n\n"
               "  -h --help              Show this help and exit\n"
               "  --version              Print version string and exit\n"
               "\nCommands:\n"
               "  suspend                Suspend the system\n"
               "  hibernate              Hibernate the system\n"
               "  hybrid-sleep           Both hibernate and suspend the system\n"
               "  suspend-then-hibernate Initially suspend and then hibernate\n"
               "                         the system after a fixed period of time\n"
               "\nSee the %s for details.\n"
               , program_invocation_short_name
               , link
        );

        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("Unhandled option");
                }

        if (argc - optind != 1)
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Usage: %s COMMAND",
                                       program_invocation_short_name);

        arg_verb = argv[optind];

        if (!STR_IN_SET(arg_verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate"))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Unknown command '%s'.", arg_verb);

        return 1 /* work to do */;
}

static int run(int argc, char *argv[]) {
        bool allow;
        _cleanup_strv_free_ char **modes = NULL, **states = NULL;
        usec_t delay = 0;
        int r;

        log_setup_service();

        r = parse_argv(argc, argv);
        if (r <= 0)
                return r;

        r = parse_sleep_config(arg_verb, &allow, &modes, &states, &delay);
        if (r < 0)
                return r;

        if (!allow)
                return log_error_errno(SYNTHETIC_ERRNO(EACCES),
                                       "Sleep mode \"%s\" is disabled by configuration, refusing.",
                                       arg_verb);

        if (streq(arg_verb, "suspend-then-hibernate"))
                return execute_s2h(delay);
        else
                return execute(modes, states);
}

DEFINE_MAIN_FUNCTION(run);
Commit	Line	Data
52ad194e	1	/* SPDX-License-Identifier: LGPL-2.1+ */
663996b3	2	/***
b012e921 MB	3	Copyright © 2010-2017 Canonical
b012e921 MB	4	Copyright © 2018 Dell Inc.
663996b3 MS	5	***/
663996b3 MS	6
663996b3	7	#include <errno.h>
663996b3	8	#include <getopt.h>
b012e921	9	#include <linux/fiemap.h>
6300502b	10	#include <stdio.h>
663996b3	11
60f067b4	12	#include "sd-messages.h"
6300502b MP	13
6300502b MP	14	#include "def.h"
2897b343	15	#include "exec-util.h"
db2df898	16	#include "fd-util.h"
663996b3	17	#include "fileio.h"
6300502b	18	#include "log.h"
6e866b33 MB	19	#include "main-func.h"
	20	#include "parse-util.h"
	21	#include "pretty-print.h"
663996b3	22	#include "sleep-config.h"
b012e921	23	#include "stdio-util.h"
db2df898	24	#include "string-util.h"
6300502b MP	25	#include "strv.h"
6300502b MP	26	#include "util.h"
663996b3 MS	27
	28	static char* arg_verb = NULL;
	29
b012e921 MB	30	static int write_hibernate_location_info(void) {
	31	_cleanup_free_ char device = NULL, type = NULL;
	32	_cleanup_free_ struct fiemap *fiemap = NULL;
	33	char offset_str[DECIMAL_STR_MAX(uint64_t)];
	34	char device_str[DECIMAL_STR_MAX(uint64_t)];
	35	_cleanup_close_ int fd = -1;
	36	struct stat stb;
	37	uint64_t offset;
	38	int r;
	39
	40	r = find_hibernate_location(&device, &type, NULL, NULL);
	41	if (r < 0)
	42	return log_debug_errno(r, "Unable to find hibernation location: %m");
	43
	44	/* if it's a swap partition, we just write the disk to /sys/power/resume */
6e866b33 MB	45	if (streq(type, "partition")) {
	46	r = write_string_file("/sys/power/resume", device, WRITE_STRING_FILE_DISABLE_BUFFER);
	47	if (r < 0)
	48	return log_debug_errno(r, "Faileed to write partitoin device to /sys/power/resume: %m");
	49
	50	return r;
	51	}
	52	if (!streq(type, "file"))
	53	return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
	54	"Invalid hibernate type: %s", type);
b012e921 MB	55
b012e921 MB	56	/* Only available in 4.17+ */
6e866b33 MB	57	if (access("/sys/power/resume_offset", W_OK) < 0) {
	58	if (errno == ENOENT) {
	59	log_debug("Kernel too old, can't configure resume offset, ignoring.");
b012e921	60	return 0;
6e866b33	61	}
b012e921	62
b012e921	63	return log_debug_errno(errno, "/sys/power/resume_offset not writeable: %m");
6e866b33	64	}
b012e921 MB	65
	66	fd = open(device, O_RDONLY \| O_CLOEXEC \| O_NONBLOCK);
	67	if (fd < 0)
	68	return log_debug_errno(errno, "Unable to open '%s': %m", device);
	69	r = fstat(fd, &stb);
	70	if (r < 0)
	71	return log_debug_errno(errno, "Unable to stat %s: %m", device);
6e866b33	72
b012e921 MB	73	r = read_fiemap(fd, &fiemap);
b012e921 MB	74	if (r < 0)
6e866b33 MB	75	return log_debug_errno(r, "Unable to read extent map for '%s': %m", device);
	76	if (fiemap->fm_mapped_extents == 0)
	77	return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
	78	"No extents found in '%s'", device);
	79
b012e921 MB	80	offset = fiemap->fm_extents[0].fe_physical / page_size();
b012e921 MB	81	xsprintf(offset_str, "%" PRIu64, offset);
6e866b33	82	r = write_string_file("/sys/power/resume_offset", offset_str, WRITE_STRING_FILE_DISABLE_BUFFER);
b012e921	83	if (r < 0)
6e866b33	84	return log_debug_errno(r, "Failed to write offset '%s': %m", offset_str);
b012e921 MB	85
b012e921 MB	86	xsprintf(device_str, "%lx", (unsigned long)stb.st_dev);
6e866b33	87	r = write_string_file("/sys/power/resume", device_str, WRITE_STRING_FILE_DISABLE_BUFFER);
b012e921	88	if (r < 0)
6e866b33 MB	89	return log_debug_errno(r, "Failed to write device '%s': %m", device_str);
6e866b33 MB	90
b012e921 MB	91	return 0;
	92	}
	93
663996b3 MS	94	static int write_mode(char **modes) {
	95	int r = 0;
	96	char **mode;
	97
	98	STRV_FOREACH(mode, modes) {
60f067b4 JS	99	int k;
60f067b4 JS	100
6e866b33 MB	101	k = write_string_file("/sys/power/disk", *mode, WRITE_STRING_FILE_DISABLE_BUFFER);
6e866b33 MB	102	if (k >= 0)
663996b3	103	return 0;
60f067b4	104
6e866b33 MB	105	log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", *mode);
6e866b33 MB	106	if (r >= 0)
663996b3 MS	107	r = k;
	108	}
	109
663996b3 MS	110	return r;
	111	}
	112
60f067b4	113	static int write_state(FILE f, char states) {
663996b3 MS	114	char **state;
	115	int r = 0;
	116
	117	STRV_FOREACH(state, states) {
	118	int k;
	119
6e866b33 MB	120	k = write_string_stream(f, state, WRITE_STRING_FILE_DISABLE_BUFFER);
6e866b33 MB	121	if (k >= 0)
663996b3	122	return 0;
6e866b33 MB	123	log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m", *state);
6e866b33 MB	124	if (r >= 0)
663996b3 MS	125	r = k;
663996b3 MS	126
60f067b4 JS	127	fclose(*f);
60f067b4 JS	128	*f = fopen("/sys/power/state", "we");
f47781d8	129	if (!*f)
b012e921	130	return -errno;
663996b3 MS	131	}
	132
	133	return r;
	134	}
	135
	136	static int execute(char modes, char states) {
f47781d8 MP	137	char *arguments[] = {
	138	NULL,
	139	(char*) "pre",
	140	arg_verb,
	141	NULL
	142	};
f5e65279 MB	143	static const char* const dirs[] = {
	144	SYSTEM_SLEEP_PATH,
	145	NULL
	146	};
f47781d8	147
663996b3	148	int r;
60f067b4	149	_cleanup_fclose_ FILE *f = NULL;
663996b3 MS	150
663996b3 MS	151	/* This file is opened first, so that if we hit an error,
60f067b4	152	* we can abort before modifying any state. */
663996b3	153	f = fopen("/sys/power/state", "we");
f47781d8 MP	154	if (!f)
f47781d8 MP	155	return log_error_errno(errno, "Failed to open /sys/power/state: %m");
663996b3	156
6e866b33 MB	157	setvbuf(f, NULL, _IONBF, 0);
6e866b33 MB	158
663996b3	159	/* Configure the hibernation mode */
b012e921 MB	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)
	166	return log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");;
	167	}
663996b3	168
6e866b33	169	execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL);
663996b3 MS	170
663996b3 MS	171	log_struct(LOG_INFO,
2897b343	172	"MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
f47781d8	173	LOG_MESSAGE("Suspending system..."),
b012e921	174	"SLEEP=%s", arg_verb);
663996b3	175
60f067b4	176	r = write_state(&f, states);
663996b3	177	if (r < 0)
6e866b33 MB	178	log_struct_errno(LOG_ERR, r,
	179	"MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
	180	LOG_MESSAGE("Failed to suspend system. System resumed again: %m"),
	181	"SLEEP=%s", arg_verb);
	182	else
	183	log_struct(LOG_INFO,
	184	"MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
	185	LOG_MESSAGE("System resumed."),
	186	"SLEEP=%s", arg_verb);
663996b3 MS	187
663996b3 MS	188	arguments[1] = (char*) "post";
6e866b33	189	execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL);
663996b3 MS	190
	191	return r;
	192	}
	193
6e866b33	194	static int rtc_read_time(uint64_t *ret_sec) {
b012e921	195	_cleanup_free_ char *t = NULL;
6e866b33	196	int r;
b012e921	197
6e866b33 MB	198	r = read_one_line_file("/sys/class/rtc/rtc0/since_epoch", &t);
	199	if (r < 0)
	200	return log_error_errno(r, "Failed to read RTC time: %m");
	201
	202	r = safe_atou64(t, ret_sec);
	203	if (r < 0)
	204	return log_error_errno(r, "Failed to parse RTC time '%s': %m", t);
b012e921	205
6e866b33 MB	206	return 0;
6e866b33 MB	207	}
b012e921	208
6e866b33 MB	209	static int rtc_write_wake_alarm(uint64_t sec) {
6e866b33 MB	210	char buf[DECIMAL_STR_MAX(uint64_t)];
b012e921 MB	211	int r;
b012e921 MB	212
6e866b33	213	xsprintf(buf, "%" PRIu64, sec);
b012e921	214
6e866b33	215	r = write_string_file("/sys/class/rtc/rtc0/wakealarm", buf, WRITE_STRING_FILE_DISABLE_BUFFER);
b012e921	216	if (r < 0)
6e866b33	217	return log_error_errno(r, "Failed to write '%s' to /sys/class/rtc/rtc0/wakealarm: %m", buf);
b012e921 MB	218
	219	return 0;
	220	}
	221
	222	static int execute_s2h(usec_t hibernate_delay_sec) {
	223
	224	_cleanup_strv_free_ char hibernate_modes = NULL, hibernate_states = NULL,
	225	suspend_modes = NULL, suspend_states = NULL;
6e866b33	226	usec_t original_time, wake_time, cmp_time;
b012e921 MB	227	int r;
b012e921 MB	228
6e866b33	229	r = parse_sleep_config("suspend", NULL, &suspend_modes, &suspend_states, NULL);
b012e921 MB	230	if (r < 0)
	231	return r;
	232
6e866b33	233	r = parse_sleep_config("hibernate", NULL, &hibernate_modes, &hibernate_states, NULL);
b012e921 MB	234	if (r < 0)
	235	return r;
	236
6e866b33	237	r = rtc_read_time(&original_time);
b012e921	238	if (r < 0)
6e866b33	239	return r;
b012e921	240
6e866b33 MB	241	wake_time = original_time + DIV_ROUND_UP(hibernate_delay_sec, USEC_PER_SEC);
6e866b33 MB	242	r = rtc_write_wake_alarm(wake_time);
b012e921 MB	243	if (r < 0)
	244	return r;
	245
6e866b33	246	log_debug("Set RTC wake alarm for %" PRIu64, wake_time);
b012e921 MB	247
	248	r = execute(suspend_modes, suspend_states);
	249	if (r < 0)
	250	return r;
	251
6e866b33 MB	252	/* Reset RTC right-away */
6e866b33 MB	253	r = rtc_write_wake_alarm(0);
b012e921	254	if (r < 0)
6e866b33	255	return r;
b012e921	256
6e866b33	257	r = rtc_read_time(&cmp_time);
b012e921 MB	258	if (r < 0)
	259	return r;
	260
	261	log_debug("Woke up at %"PRIu64, cmp_time);
	262
6e866b33 MB	263	if (cmp_time < wake_time) /* We woke up before the alarm time, we are done. */
	264	return 0;
	265
	266	/* If woken up after alarm time, hibernate */
	267	r = execute(hibernate_modes, hibernate_states);
	268	if (r < 0) {
	269	log_notice("Couldn't hibernate, will try to suspend again.");
	270	r = execute(suspend_modes, suspend_states);
	271	if (r < 0) {
	272	log_notice("Could neither hibernate nor suspend again, giving up.");
	273	return r;
	274	}
	275	}
b012e921	276
6e866b33	277	return 0;
b012e921 MB	278	}
b012e921 MB	279
6e866b33 MB	280	static int help(void) {
	281	_cleanup_free_ char *link = NULL;
	282	int r;
	283
	284	r = terminal_urlify_man("systemd-suspend.service", "8", &link);
	285	if (r < 0)
	286	return log_oom();
	287
663996b3 MS	288	printf("%s COMMAND\n\n"
663996b3 MS	289	"Suspend the system, hibernate the system, or both.\n\n"
6e866b33 MB	290	" -h --help Show this help and exit\n"
	291	" --version Print version string and exit\n"
	292	"\nCommands:\n"
	293	" suspend Suspend the system\n"
	294	" hibernate Hibernate the system\n"
	295	" hybrid-sleep Both hibernate and suspend the system\n"
b012e921	296	" suspend-then-hibernate Initially suspend and then hibernate\n"
6e866b33 MB	297	" the system after a fixed period of time\n"
	298	"\nSee the %s for details.\n"
	299	, program_invocation_short_name
	300	, link
	301	);
	302
	303	return 0;
663996b3 MS	304	}
	305
	306	static int parse_argv(int argc, char *argv[]) {
	307	enum {
	308	ARG_VERSION = 0x100,
	309	};
	310
	311	static const struct option options[] = {
	312	{ "help", no_argument, NULL, 'h' },
	313	{ "version", no_argument, NULL, ARG_VERSION },
60f067b4	314	{}
663996b3 MS	315	};
	316
	317	int c;
	318
	319	assert(argc >= 0);
	320	assert(argv);
	321
5eef597e	322	while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
663996b3 MS	323	switch(c) {
663996b3 MS	324	case 'h':
6e866b33	325	return help();
663996b3 MS	326
663996b3 MS	327	case ARG_VERSION:
6300502b	328	return version();
663996b3 MS	329
	330	case '?':
	331	return -EINVAL;
	332
	333	default:
60f067b4	334	assert_not_reached("Unhandled option");
663996b3 MS	335	}
663996b3 MS	336
6e866b33 MB	337	if (argc - optind != 1)
	338	return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
	339	"Usage: %s COMMAND",
	340	program_invocation_short_name);
663996b3 MS	341
	342	arg_verb = argv[optind];
	343
6e866b33 MB	344	if (!STR_IN_SET(arg_verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate"))
	345	return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
	346	"Unknown command '%s'.", arg_verb);
663996b3 MS	347
	348	return 1 /* work to do */;
	349	}
	350
6e866b33 MB	351	static int run(int argc, char *argv[]) {
6e866b33 MB	352	bool allow;
663996b3	353	_cleanup_strv_free_ char modes = NULL, states = NULL;
b012e921	354	usec_t delay = 0;
663996b3 MS	355	int r;
663996b3 MS	356
6e866b33	357	log_setup_service();
663996b3 MS	358
	359	r = parse_argv(argc, argv);
	360	if (r <= 0)
6e866b33	361	return r;
663996b3	362
6e866b33	363	r = parse_sleep_config(arg_verb, &allow, &modes, &states, &delay);
663996b3	364	if (r < 0)
6e866b33 MB	365	return r;
	366
	367	if (!allow)
	368	return log_error_errno(SYNTHETIC_ERRNO(EACCES),
	369	"Sleep mode \"%s\" is disabled by configuration, refusing.",
	370	arg_verb);
663996b3	371
b012e921	372	if (streq(arg_verb, "suspend-then-hibernate"))
6e866b33	373	return execute_s2h(delay);
b012e921	374	else
6e866b33	375	return execute(modes, states);
663996b3	376	}
6e866b33 MB	377
6e866b33 MB	378	DEFINE_MAIN_FUNCTION(run);