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authorLennart Poettering <lennart@poettering.net>2013-11-08 19:32:45 +0100
committerLennart Poettering <lennart@poettering.net>2013-11-08 19:32:45 +0100
commit477def8097245a124f8ff51d17415cf78cde691b (patch)
tree7d35f941c3855b63af2c46dfb3d9e45a8f2bb100 /src/core
parent6d6d40c910e14de8b09db58833dd1f1d95c03169 (diff)
shutdown: unify handling of reboot() syscall a bit
Diffstat (limited to 'src/core')
-rw-r--r--src/core/shutdown.c72
1 files changed, 50 insertions, 22 deletions
diff --git a/src/core/shutdown.c b/src/core/shutdown.c
index 377c1971a3..b5eb8b12de 100644
--- a/src/core/shutdown.c
+++ b/src/core/shutdown.c
@@ -135,7 +135,7 @@ static int pivot_to_new_root(void) {
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;
@@ -174,11 +174,9 @@ int main(int argc, char *argv[]) {
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, &param);
- } 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;
@@ -318,39 +316,69 @@ int main(int argc, char *argv[]) {
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, &param) >= 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);
}