int main(int argc, char *argv[]) {
bool need_umount = true, need_swapoff = true, need_loop_detach = true, need_dm_detach = true;
bool in_container, use_watchdog = false;
- _cleanup_free_ char *line = NULL, *cgroup = NULL, *param = NULL;
+ _cleanup_free_ char *line = NULL, *cgroup = NULL;
char *arguments[3];
unsigned retries;
int cmd, r;
in_container = detect_container(NULL) > 0;
- if (streq(argv[1], "reboot")) {
+ if (streq(argv[1], "reboot"))
cmd = RB_AUTOBOOT;
- /* if this fails, that's OK */
- read_one_line_file(REBOOT_PARAM_FILE, ¶m);
- } else if (streq(argv[1], "poweroff"))
+ else if (streq(argv[1], "poweroff"))
cmd = RB_POWER_OFF;
else if (streq(argv[1], "halt"))
cmd = RB_HALT_SYSTEM;
if (!in_container)
sync();
- if (cmd == LINUX_REBOOT_CMD_KEXEC) {
+ switch (cmd) {
+
+ case LINUX_REBOOT_CMD_KEXEC:
if (!in_container) {
/* We cheat and exec kexec to avoid doing all its work */
- pid_t pid = fork();
+ pid_t pid;
+
+ log_info("Rebooting with kexec.");
+ pid = fork();
if (pid < 0)
- log_error("Could not fork: %m. Falling back to normal reboot.");
- else if (pid > 0) {
- wait_for_terminate_and_warn("kexec", pid);
- log_warning("kexec failed. Falling back to normal reboot.");
- } else {
+ log_error("Failed to fork: %m");
+ else if (pid == 0) {
+
+ const char * const args[] = {
+ KEXEC, "-e", NULL
+ };
+
/* Child */
- const char *args[3] = { KEXEC, "-e", NULL };
+
execv(args[0], (char * const *) args);
- return EXIT_FAILURE;
- }
+ _exit(EXIT_FAILURE);
+ } else
+ wait_for_terminate_and_warn("kexec", pid);
}
cmd = RB_AUTOBOOT;
- }
+ /* Fall through */
- if (param)
- syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
- LINUX_REBOOT_CMD_RESTART2, param);
- else
- reboot(cmd);
+ case RB_AUTOBOOT:
+
+ if (!in_container) {
+ _cleanup_free_ char *param = NULL;
+
+ if (read_one_line_file(REBOOT_PARAM_FILE, ¶m) >= 0) {
+ log_info("Rebooting with argument '%s'.", param);
+ syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
+ LINUX_REBOOT_CMD_RESTART2, param);
+ }
+ }
+
+ log_info("Rebooting.");
+ break;
+
+ case RB_POWER_OFF:
+ log_info("Powering off.");
+ break;
+
+ case RB_HALT_SYSTEM:
+ log_info("Halting system.");
+ break;
+
+ default:
+ assert_not_reached("Unknown magic");
+ }
+ reboot(cmd);
if (errno == EPERM && in_container) {
/* If we are in a container, and we lacked
* CAP_SYS_BOOT just exit, this will kill our
* container for good. */
- log_error("Exiting container.");
+ log_info("Exiting container.");
exit(0);
}
static bool arg_plain = false;
static int daemon_reload(sd_bus *bus, char **args);
-static void halt_now(enum action a);
+static int halt_now(enum action a);
static void pager_open_if_enabled(void) {
(a == ACTION_HALT ||
a == ACTION_POWEROFF ||
a == ACTION_REBOOT))
- halt_now(a);
+ return halt_now(a);
if (arg_force >= 1 &&
(a == ACTION_HALT ||
return 0;
}
-static _noreturn_ void halt_now(enum action a) {
+static int halt_now(enum action a) {
- _cleanup_free_ char *param = NULL;
-
- /* Make sure C-A-D is handled by the kernel from this
+/* Make sure C-A-D is handled by the kernel from this
* point on... */
reboot(RB_ENABLE_CAD);
case ACTION_HALT:
log_info("Halting.");
reboot(RB_HALT_SYSTEM);
- break;
+ return -errno;
case ACTION_POWEROFF:
log_info("Powering off.");
reboot(RB_POWER_OFF);
- break;
+ return -errno;
- case ACTION_REBOOT:
+ case ACTION_REBOOT: {
+ _cleanup_free_ char *param = NULL;
- if (read_one_line_file(REBOOT_PARAM_FILE, ¶m) == 0) {
- log_info("Rebooting with arg '%s'.", param);
+ if (read_one_line_file(REBOOT_PARAM_FILE, ¶m) >= 0) {
+ log_info("Rebooting with argument '%s'.", param);
syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_RESTART2, param);
- } else {
- log_info("Rebooting.");
- reboot(RB_AUTOBOOT);
}
- break;
- default:
- assert_not_reached("Unknown halt action.");
+ log_info("Rebooting.");
+ reboot(RB_AUTOBOOT);
+ return -errno;
}
- assert_not_reached("Uh? This shouldn't happen.");
+ default:
+ assert_not_reached("Unknown action.");
+ }
}
static int halt_main(sd_bus *bus) {
if (arg_dry)
return 0;
- halt_now(arg_action);
- /* We should never reach this. */
- return -ENOSYS;
+ r = halt_now(arg_action);
+ log_error("Failed to reboot: %s", strerror(-r));
+
+ return r;
}
static int runlevel_main(void) {