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/>.
28 #include "systemd/sd-id128.h"
29 #include "systemd/sd-messages.h"
35 #include "sleep-config.h"
37 static char* arg_verb = NULL;
39 static int write_mode(char **modes) {
43 STRV_FOREACH(mode, modes) {
44 int k = write_string_file("/sys/power/disk", *mode);
47 log_debug("Failed to write '%s' to /sys/power/disk: %s",
54 log_error("Failed to write mode to /sys/power/disk: %s",
60 static int write_state(FILE **f, char **states) {
64 STRV_FOREACH(state, states) {
67 k = write_string_to_file(*f, *state);
70 log_debug("Failed to write '%s' to /sys/power/state: %s",
71 *state, strerror(-k));
76 *f = fopen("/sys/power/state", "we");
78 log_error("Failed to open /sys/power/state: %m");
86 static int execute(char **modes, char **states) {
89 _cleanup_fclose_ FILE *f = NULL;
90 const char* note = strappenda("SLEEP=", arg_verb);
92 /* This file is opened first, so that if we hit an error,
93 * we can abort before modyfing any state. */
94 f = fopen("/sys/power/state", "we");
96 log_error("Failed to open /sys/power/state: %m");
100 /* Configure the hibernation mode */
101 r = write_mode(modes);
106 arguments[1] = (char*) "pre";
107 arguments[2] = arg_verb;
109 execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
112 MESSAGE_ID(SD_MESSAGE_SLEEP_START),
113 "MESSAGE=Suspending system...",
117 r = write_state(&f, states);
122 MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
123 "MESSAGE=System resumed.",
127 arguments[1] = (char*) "post";
128 execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
133 static int help(void) {
134 printf("%s COMMAND\n\n"
135 "Suspend the system, hibernate the system, or both.\n\n"
137 " -h --help Show this help and exit\n"
138 " --version Print version string and exit\n"
139 " suspend Suspend the system\n"
140 " hibernate Hibernate the system\n"
141 " hybrid-sleep Both hibernate and suspend the system\n"
142 , program_invocation_short_name
148 static int parse_argv(int argc, char *argv[]) {
153 static const struct option options[] = {
154 { "help", no_argument, NULL, 'h' },
155 { "version", no_argument, NULL, ARG_VERSION },
164 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;