This file is part of systemd.
Copyright 2012 Lennart Poettering
+ Copyright 2013 Zbigniew Jędrzejewski-Szmek
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
#include <stdio.h>
#include <errno.h>
#include <string.h>
+#include <getopt.h>
-#include "log.h"
-#include "util.h"
#include "systemd/sd-id128.h"
#include "systemd/sd-messages.h"
+#include "log.h"
+#include "util.h"
+#include "strv.h"
#include "fileio.h"
+#include "build.h"
+#include "sleep-config.h"
+
+static char* arg_verb = NULL;
+
+static int write_mode(char **modes) {
+ int r = 0;
+ char **mode;
+
+ STRV_FOREACH(mode, modes) {
+ int k = write_string_file("/sys/power/disk", *mode);
+ if (k == 0)
+ return 0;
+ log_debug("Failed to write '%s' to /sys/power/disk: %s",
+ *mode, strerror(-k));
+ if (r == 0)
+ r = k;
+ }
-int main(int argc, char *argv[]) {
- const char *verb;
- char* arguments[4];
- int r;
- FILE *f;
+ if (r < 0)
+ log_error("Failed to write mode to /sys/power/disk: %s",
+ strerror(-r));
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
+ return r;
+}
- if (argc != 2) {
- log_error("Invalid number of arguments.");
- r = -EINVAL;
- goto finish;
+static int write_state(FILE *f0, char **states) {
+ FILE _cleanup_fclose_ *f = f0;
+ char **state;
+ int r = 0;
+
+ STRV_FOREACH(state, states) {
+ int k;
+
+ k = write_string_to_file(f, *state);
+ if (k == 0)
+ return 0;
+ log_debug("Failed to write '%s' to /sys/power/state: %s",
+ *state, strerror(-k));
+ if (r == 0)
+ r = k;
+
+ fclose(f);
+ f = fopen("/sys/power/state", "we");
+ if (!f) {
+ log_error("Failed to open /sys/power/state: %m");
+ return -errno;
+ }
}
- if (streq(argv[1], "suspend"))
- verb = "mem";
- else if (streq(argv[1], "hibernate") || streq(argv[1], "hybrid-sleep"))
- verb = "disk";
- else {
- log_error("Unknown action '%s'.", argv[1]);
- r = -EINVAL;
- goto finish;
- }
+ return r;
+}
- /* Configure the hibernation mode */
- if (streq(argv[1], "hibernate")) {
- if (write_string_file("/sys/power/disk", "platform") < 0)
- write_string_file("/sys/power/disk", "shutdown");
- } else if (streq(argv[1], "hybrid-sleep")) {
- if (write_string_file("/sys/power/disk", "suspend") < 0)
- if (write_string_file("/sys/power/disk", "platform") < 0)
- write_string_file("/sys/power/disk", "shutdown");
- }
+static int execute(char **modes, char **states) {
+ char* arguments[4];
+ int r;
+ FILE *f;
+ const char* note = strappenda("SLEEP=", arg_verb);
+ /* This file is opened first, so that if we hit an error,
+ * we can abort before modyfing any state. */
f = fopen("/sys/power/state", "we");
if (!f) {
log_error("Failed to open /sys/power/state: %m");
- r = -errno;
- goto finish;
+ return -errno;
}
+ /* Configure the hibernation mode */
+ r = write_mode(modes);
+ if (r < 0)
+ return r;
+
arguments[0] = NULL;
arguments[1] = (char*) "pre";
- arguments[2] = argv[1];
+ arguments[2] = arg_verb;
arguments[3] = NULL;
execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
- if (streq(argv[1], "suspend"))
- log_struct(LOG_INFO,
- MESSAGE_ID(SD_MESSAGE_SLEEP_START),
- "MESSAGE=Suspending system...",
- "SLEEP=suspend",
- NULL);
- else if (streq(argv[1], "hibernate"))
- log_struct(LOG_INFO,
- MESSAGE_ID(SD_MESSAGE_SLEEP_START),
- "MESSAGE=Hibernating system...",
- "SLEEP=hibernate",
- NULL);
- else
- log_struct(LOG_INFO,
- MESSAGE_ID(SD_MESSAGE_SLEEP_START),
- "MESSAGE=Hibernating and suspending system...",
- "SLEEP=hybrid-sleep",
- NULL);
-
- fputs(verb, f);
- fputc('\n', f);
- fflush(f);
-
- r = ferror(f) ? -errno : 0;
-
- if (streq(argv[1], "suspend"))
- log_struct(LOG_INFO,
- MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
- "MESSAGE=System resumed.",
- "SLEEP=suspend",
- NULL);
- else
- log_struct(LOG_INFO,
- MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
- "MESSAGE=System thawed.",
- "SLEEP=hibernate",
- NULL);
+ log_struct(LOG_INFO,
+ MESSAGE_ID(SD_MESSAGE_SLEEP_START),
+ "MESSAGE=Suspending system...",
+ note,
+ NULL);
+
+ r = write_state(f, states);
+ if (r < 0)
+ return r;
+
+ log_struct(LOG_INFO,
+ MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
+ "MESSAGE=System resumed.",
+ note,
+ NULL);
arguments[1] = (char*) "post";
execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
- fclose(f);
+ return r;
+}
-finish:
+static int help(void) {
+ printf("%s COMMAND\n\n"
+ "Suspend the system, hibernate the system, or both.\n\n"
+ "Commands:\n"
+ " -h --help Show this help and exit\n"
+ " --version Print version string and exit\n"
+ " suspend Suspend the system\n"
+ " hibernate Hibernate the system\n"
+ " hybrid-sleep Both hibernate and suspend the system\n"
+ , program_invocation_short_name
+ );
+
+ return 0;
+}
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+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 },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0)
+ switch(c) {
+ case 'h':
+ help();
+ return 0 /* done */;
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(SYSTEMD_FEATURES);
+ return 0 /* done */;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+
+ if (argc - optind != 1) {
+ log_error("Usage: %s COMMAND",
+ program_invocation_short_name);
+ return -EINVAL;
+ }
+
+ arg_verb = argv[optind];
+ if (!streq(arg_verb, "suspend") &&
+ !streq(arg_verb, "hibernate") &&
+ !streq(arg_verb, "hybrid-sleep")) {
+ log_error("Unknown command '%s'.", arg_verb);
+ return -EINVAL;
+ }
+
+ return 1 /* work to do */;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_strv_free_ char **modes = NULL, **states = NULL;
+ int r;
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ r = parse_sleep_config(arg_verb, &modes, &states);
+ if (r < 0)
+ goto finish;
+
+ r = execute(modes, states);
+
+finish:
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff