+static int run_helper(const char *helper) {
+ int pid = fork();
+ if (pid < 0) {
+ return log_error_errno(errno, "Failed to fork: %m");
+ }
+
+ if (pid == 0) {
+ /* Child */
+
+ close_all_fds(NULL, 0);
+
+ execlp(helper, helper, NULL);
+ log_error_errno(errno, "Failed to execute %s: %m", helper);
+ _exit(EXIT_FAILURE);
+ }
+
+ return wait_for_terminate_and_warn(helper, pid, true);
+}
+
+static int write_mode(char **modes) {
+ int r = 0;
+ char **mode;
+
+ STRV_FOREACH(mode, modes) {
+ int k;
+
+ k = write_string_file("/sys/power/disk", *mode);
+ if (k == 0)
+ return 0;
+
+ log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
+ *mode);
+ if (r == 0)
+ r = k;
+ }
+
+ if (r < 0)
+ log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
+
+ return r;
+}
+
+static int write_state(FILE **f, char **states) {
+ char **state;
+ int r = 0;
+
+ STRV_FOREACH(state, states) {
+ int k;
+
+ k = write_string_stream(*f, *state);
+ if (k == 0)
+ return 0;
+ log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
+ *state);
+ if (r == 0)
+ r = k;
+
+ fclose(*f);
+ *f = fopen("/sys/power/state", "we");
+ if (!*f)
+ return log_error_errno(errno, "Failed to open /sys/power/state: %m");
+ }
+
+ return r;
+}
+
+static int do_sleep(const char *arg_verb) {
+ _cleanup_strv_free_ char **modes = NULL, **states = NULL;
+ char *arguments[] = {
+ NULL,
+ (char*) "pre",
+ (char*) arg_verb,
+ NULL
+ };
+ static const char* const dirs[] = { SYSTEM_SLEEP_PATH, NULL};
+ int r;
+ _cleanup_fclose_ FILE *f = NULL;
+
+ r = parse_sleep_config(arg_verb, &modes, &states);
+ if (r < 0)
+ return r;
+
+ /* This file is opened first, so that if we hit an error,
+ * we can abort before modifying any state. */
+ f = fopen("/sys/power/state", "we");
+ if (!f)
+ return log_error_errno(errno, "Failed to open /sys/power/state: %m");
+
+ /* Configure the hibernation mode */
+ r = write_mode(modes);
+ if (r < 0)
+ return r;
+
+ execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
+
+ log_struct(LOG_INFO,
+ LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_START),
+ LOG_MESSAGE("Suspending system..."),
+ "SLEEP=%s", arg_verb,
+ NULL);
+
+ r = write_state(&f, states);
+ if (r < 0)
+ return r;
+
+ log_struct(LOG_INFO,
+ LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
+ LOG_MESSAGE("System resumed."),
+ "SLEEP=%s", arg_verb,
+ NULL);
+
+ arguments[1] = (char*) "post";
+ execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
+
+ return r;
+}
+
+int shutdown_or_sleep(HandleAction action) {
+ switch (action) {
+ case HANDLE_POWEROFF:
+ return run_helper(HALT);
+ case HANDLE_REBOOT:
+ return run_helper(REBOOT);
+ case HANDLE_HALT:
+ return run_helper(HALT);
+ case HANDLE_KEXEC:
+ return run_helper(KEXEC);
+ case HANDLE_SUSPEND:
+ return do_sleep("suspend");
+ case HANDLE_HIBERNATE:
+ return do_sleep("hibernate");
+ case HANDLE_HYBRID_SLEEP:
+ return do_sleep("hybrid-sleep");
+ default:
+ return -EINVAL;
+ }
+}
+
~ianmdlvl / elogind.git / commitdiff