2 This file is part of systemd.
4 Copyright 2012 Lennart Poettering
5 Copyright 2013 Zbigniew Jędrzejewski-Szmek
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include "sd-messages.h"
31 //#include "sleep-config.h"
32 //#include "string-util.h"
36 /// Additional includes needed by elogind
39 static char* arg_verb = NULL;
41 static int write_mode(char **modes) {
45 STRV_FOREACH(mode, modes) {
48 k = write_string_file("/sys/power/disk", *mode, 0);
52 log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
59 log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
64 static int write_state(FILE **f, char **states) {
68 STRV_FOREACH(state, states) {
71 k = write_string_stream(*f, *state, true);
74 log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
80 *f = fopen("/sys/power/state", "we");
82 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
88 static int execute(char **modes, char **states) {
96 static const char* const dirs[] = {SYSTEM_SLEEP_PATH, NULL};
99 _cleanup_fclose_ FILE *f = NULL;
101 /* This file is opened first, so that if we hit an error,
102 * we can abort before modifying any state. */
103 f = fopen("/sys/power/state", "we");
105 return log_error_errno(errno, "Failed to open /sys/power/state: %m");
107 /* Configure the hibernation mode */
108 r = write_mode(modes);
112 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
115 LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_START),
116 LOG_MESSAGE("Suspending system..."),
117 "SLEEP=%s", arg_verb,
120 r = write_state(&f, states);
125 LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
126 LOG_MESSAGE("System resumed."),
127 "SLEEP=%s", arg_verb,
130 arguments[1] = (char*) "post";
131 execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
136 #if 0 /// elogind calls execute() by itself and does not need another binary
137 static void help(void) {
138 printf("%s COMMAND\n\n"
139 "Suspend the system, hibernate the system, or both.\n\n"
141 " -h --help Show this help and exit\n"
142 " --version Print version string and exit\n"
143 " suspend Suspend the system\n"
144 " hibernate Hibernate the system\n"
145 " hybrid-sleep Both hibernate and suspend the system\n"
146 , program_invocation_short_name);
149 static int parse_argv(int argc, char *argv[]) {
154 static const struct option options[] = {
155 { "help", no_argument, NULL, 'h' },
156 { "version", no_argument, NULL, ARG_VERSION },
165 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
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;
221 int do_sleep(const char *verb, char **modes, char **states) {
223 arg_verb = (char*)verb;
224 return execute(modes, states);