216 lines
6.0 KiB
C
216 lines
6.0 KiB
C
/***
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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Copyright 2013 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include "sd-messages.h"
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#include "def.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "log.h"
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#include "sleep-config.h"
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#include "string-util.h"
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#include "strv.h"
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#include "util.h"
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static char* arg_verb = NULL;
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static int write_mode(char **modes) {
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int r = 0;
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char **mode;
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STRV_FOREACH(mode, modes) {
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int k;
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k = write_string_file("/sys/power/disk", *mode, 0);
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if (k == 0)
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return 0;
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log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
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*mode);
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if (r == 0)
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r = k;
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}
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if (r < 0)
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log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
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return r;
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}
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static int write_state(FILE **f, char **states) {
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char **state;
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int r = 0;
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STRV_FOREACH(state, states) {
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int k;
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k = write_string_stream(*f, *state, true);
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if (k == 0)
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return 0;
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log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
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*state);
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if (r == 0)
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r = k;
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fclose(*f);
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*f = fopen("/sys/power/state", "we");
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if (!*f)
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return log_error_errno(errno, "Failed to open /sys/power/state: %m");
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}
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return r;
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}
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static int execute(char **modes, char **states) {
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char *arguments[] = {
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NULL,
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(char*) "pre",
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arg_verb,
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NULL
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};
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static const char* const dirs[] = {SYSTEM_SLEEP_PATH, NULL};
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int r;
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_cleanup_fclose_ FILE *f = NULL;
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/* This file is opened first, so that if we hit an error,
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* we can abort before modifying any state. */
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f = fopen("/sys/power/state", "we");
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if (!f)
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return log_error_errno(errno, "Failed to open /sys/power/state: %m");
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/* Configure the hibernation mode */
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r = write_mode(modes);
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if (r < 0)
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return r;
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execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
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log_struct(LOG_INFO,
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"MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
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LOG_MESSAGE("Suspending system..."),
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"SLEEP=%s", arg_verb,
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NULL);
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r = write_state(&f, states);
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if (r < 0)
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return r;
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log_struct(LOG_INFO,
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"MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
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LOG_MESSAGE("System resumed."),
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"SLEEP=%s", arg_verb,
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NULL);
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arguments[1] = (char*) "post";
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execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
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return r;
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}
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static void help(void) {
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printf("%s COMMAND\n\n"
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"Suspend the system, hibernate the system, or both.\n\n"
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"Commands:\n"
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" -h --help Show this help and exit\n"
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" --version Print version string and exit\n"
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" suspend Suspend the system\n"
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" hibernate Hibernate the system\n"
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" hybrid-sleep Both hibernate and suspend the system\n"
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, program_invocation_short_name);
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{}
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
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switch(c) {
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case 'h':
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help();
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return 0; /* done */
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case ARG_VERSION:
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return version();
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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if (argc - optind != 1) {
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log_error("Usage: %s COMMAND",
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program_invocation_short_name);
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return -EINVAL;
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}
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arg_verb = argv[optind];
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if (!streq(arg_verb, "suspend") &&
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!streq(arg_verb, "hibernate") &&
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!streq(arg_verb, "hybrid-sleep")) {
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log_error("Unknown command '%s'.", arg_verb);
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return -EINVAL;
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}
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return 1 /* work to do */;
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}
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int main(int argc, char *argv[]) {
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_cleanup_strv_free_ char **modes = NULL, **states = NULL;
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int r;
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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goto finish;
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r = parse_sleep_config(arg_verb, &modes, &states);
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if (r < 0)
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goto finish;
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r = execute(modes, states);
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finish:
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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