1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2012 Lennart Poettering
7 Copyright 2013 Zbigniew Jędrzejewski-Szmek
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.
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.
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/>.
29 #include "sd-messages.h"
35 #include "sleep-config.h"
38 static char* arg_verb = NULL;
40 static int write_mode(char **modes) {
44 STRV_FOREACH(mode, modes) {
47 k = write_string_file("/sys/power/disk", *mode);
51 log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
58 log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
63 static int write_state(FILE **f, char **states) {
67 STRV_FOREACH(state, states) {
70 k = write_string_stream(*f, *state);
73 log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
79 *f = fopen("/sys/power/state", "we");
81 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
87 static int execute(char **modes, char **states) {
95 static const char* const dirs[] = {SYSTEM_SLEEP_PATH, NULL};
98 _cleanup_fclose_ FILE *f = NULL;
100 /* This file is opened first, so that if we hit an error,
101 * we can abort before modifying any state. */
102 f = fopen("/sys/power/state", "we");
104 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
106 /* Configure the hibernation mode */
107 r = write_mode(modes);
111 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
114 LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_START),
115 LOG_MESSAGE("Suspending system..."),
116 "SLEEP=%s", arg_verb,
119 r = write_state(&f, states);
124 LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
125 LOG_MESSAGE("System resumed."),
126 "SLEEP=%s", arg_verb,
129 arguments[1] = (char*) "post";
130 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
135 static void help(void) {
136 printf("%s COMMAND\n\n"
137 "Suspend the system, hibernate the system, or both.\n\n"
139 " -h --help Show this help and exit\n"
140 " --version Print version string and exit\n"
141 " suspend Suspend the system\n"
142 " hibernate Hibernate the system\n"
143 " hybrid-sleep Both hibernate and suspend the system\n"
144 , program_invocation_short_name);
147 static int parse_argv(int argc, char *argv[]) {
152 static const struct option options[] = {
153 { "help", no_argument, NULL, 'h' },
154 { "version", no_argument, NULL, ARG_VERSION },
163 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
170 puts(PACKAGE_STRING);
171 puts(SYSTEMD_FEATURES);
178 assert_not_reached("Unhandled option");
181 if (argc - optind != 1) {
182 log_error("Usage: %s COMMAND",
183 program_invocation_short_name);
187 arg_verb = argv[optind];
189 if (!streq(arg_verb, "suspend") &&
190 !streq(arg_verb, "hibernate") &&
191 !streq(arg_verb, "hybrid-sleep")) {
192 log_error("Unknown command '%s'.", arg_verb);
196 return 1 /* work to do */;
199 int main(int argc, char *argv[]) {
200 _cleanup_strv_free_ char **modes = NULL, **states = NULL;
203 log_set_target(LOG_TARGET_AUTO);
204 log_parse_environment();
207 r = parse_argv(argc, argv);
211 r = parse_sleep_config(arg_verb, &modes, &states);
215 r = execute(modes, states);
218 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;