return n_processes;
}
-static int send_signal(int sign) {
- sigset_t mask, oldmask;
+static void wait_for_children(int n_processes, sigset_t *mask) {
usec_t until;
- int n_processes;
- struct timespec ts;
-
- assert_se(sigemptyset(&mask) == 0);
- assert_se(sigaddset(&mask, SIGCHLD) == 0);
- if (sigprocmask(SIG_BLOCK, &mask, &oldmask) != 0)
- return -errno;
-
- if (kill(-1, SIGSTOP) < 0)
- log_warning("Failed kill(-1, SIGSTOP): %m");
-
- n_processes = killall(sign);
-
- if (kill(-1, SIGCONT) < 0)
- log_warning("Failed kill(-1, SIGCONT): %m");
- if (n_processes <= 0)
- goto finish;
+ assert(mask);
until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
for (;;) {
- usec_t n = now(CLOCK_MONOTONIC);
+ struct timespec ts;
+ int k;
+ usec_t n;
+
for (;;) {
pid_t pid = waitpid(-1, NULL, WNOHANG);
if (pid == 0)
break;
- else if (pid < 0 && errno == ECHILD) {
- n_processes = 0;
- goto finish;
- }
- if (--n_processes == 0)
- goto finish;
+ if (pid < 0 && errno == ECHILD)
+ return;
+
+ if (n_processes > 0)
+ if (--n_processes == 0)
+ return;
}
+ n = now(CLOCK_MONOTONIC);
if (n >= until)
- goto finish;
+ return;
timespec_store(&ts, until - n);
- if (sigtimedwait(&mask, NULL, &ts) != SIGCHLD)
- if (errno != EAGAIN)
- log_warning("Failed: sigtimedwait did not return SIGCHLD: %m");
+
+ if ((k = sigtimedwait(mask, NULL, &ts)) != SIGCHLD) {
+
+ if (k < 0 && errno != EAGAIN) {
+ log_error("sigtimedwait() failed: %m");
+ return;
+ }
+
+ if (k >= 0)
+ log_warning("sigtimedwait() returned unexpected signal.");
+ }
}
+}
+
+static void send_signal(int sign) {
+ sigset_t mask, oldmask;
+ int n_processes;
+
+ assert_se(sigemptyset(&mask) == 0);
+ assert_se(sigaddset(&mask, SIGCHLD) == 0);
+ assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
+
+ if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGSTOP) failed: %m");
+
+ n_processes = killall(sign);
+
+ if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGCONT) failed: %m");
+
+ if (n_processes <= 0)
+ goto finish;
+
+ wait_for_children(n_processes, &mask);
finish:
sigprocmask(SIG_SETMASK, &oldmask, NULL);
-
- return n_processes;
}
-static int rescue_send_signal(int sign) {
+static void ultimate_send_signal(int sign) {
sigset_t mask, oldmask;
- usec_t until;
- struct timespec ts;
int r;
- sigemptyset(&mask);
- sigaddset(&mask, SIGCHLD);
- if (sigprocmask(SIG_BLOCK, &mask, &oldmask) != 0)
- return -errno;
+ assert_se(sigemptyset(&mask) == 0);
+ assert_se(sigaddset(&mask, SIGCHLD) == 0);
+ assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
- if (kill(-1, SIGSTOP) < 0)
- log_warning("Failed kill(-1, SIGSTOP): %m");
+ if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGSTOP) failed: %m");
r = kill(-1, sign);
- if (r < 0)
- log_warning("Failed kill(-1, %d): %m", sign);
+ if (r < 0 && errno != ESRCH)
+ log_warning("kill(-1, %s) failed: %m", signal_to_string(sign));
- if (kill(-1, SIGCONT) < 0)
- log_warning("Failed kill(-1, SIGCONT): %m");
+ if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGCONT) failed: %m");
if (r < 0)
goto finish;
- until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
- for (;;) {
- usec_t n = now(CLOCK_MONOTONIC);
- for (;;) {
- pid_t pid = waitpid(-1, NULL, WNOHANG);
- if (pid == 0)
- break;
- else if (pid < 0 && errno == ECHILD)
- goto finish;
- }
-
- if (n >= until)
- goto finish;
-
- timespec_store(&ts, until - n);
- if (sigtimedwait(&mask, NULL, &ts) != SIGCHLD)
- if (errno != EAGAIN)
- log_warning("Failed: sigtimedwait did not return SIGCHLD: %m");
- }
+ wait_for_children(0, &mask);
finish:
sigprocmask(SIG_SETMASK, &oldmask, NULL);
-
- return r;
}
int main(int argc, char *argv[]) {
int cmd, r;
unsigned retries;
bool need_umount = true, need_swapoff = true, need_loop_detach = true, need_dm_detach = true;
- bool killed_everbody = false;
+ bool killed_everbody = false, in_container;
log_parse_environment();
log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
goto error;
}
+ in_container = detect_container(NULL) > 0;
+
if (streq(argv[1], "reboot"))
cmd = RB_AUTOBOOT;
else if (streq(argv[1], "poweroff"))
if (mlockall(MCL_CURRENT|MCL_FUTURE) != 0)
log_warning("Cannot lock process memory: %m");
- log_info("Sending SIGTERM to processes");
- r = send_signal(SIGTERM);
- if (r < 0)
- log_warning("Cannot send SIGTERM to all process: %s", strerror(r));
+ log_info("Sending SIGTERM to remaining processes...");
+ send_signal(SIGTERM);
- log_info("Sending SIGKILL to processes");
- r = send_signal(SIGKILL);
- if (r < 0)
- log_warning("Cannot send SIGKILL to all process: %s", strerror(r));
+ log_info("Sending SIGKILL to remaining processes...");
+ send_signal(SIGKILL);
+
+ if (in_container)
+ need_swapoff = false;
/* Unmount all mountpoints, swaps, and loopback devices */
for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) {
bool changed = false;
if (need_umount) {
- log_info("Unmounting filesystems.");
+ log_info("Unmounting file systems.");
r = umount_all(&changed);
if (r == 0)
need_umount = false;
else if (r > 0)
- log_warning("Not all filesystems unmounted, %d left.", r);
+ log_info("Not all file systems unmounted, %d left.", r);
else
- log_error("Error unmounting filesystems: %s", strerror(-r));
+ log_error("Failed to unmount file systems: %s", strerror(-r));
}
if (need_swapoff) {
if (r == 0)
need_swapoff = false;
else if (r > 0)
- log_warning("Not all swaps are off, %d left.", r);
+ log_info("Not all swaps are turned off, %d left.", r);
else
- log_error("Error turning off swaps: %s", strerror(-r));
+ log_error("Failed to turn off swaps: %s", strerror(-r));
}
if (need_loop_detach) {
if (r == 0)
need_loop_detach = false;
else if (r > 0)
- log_warning("Not all loop devices detached, %d left.", r);
+ log_info("Not all loop devices detached, %d left.", r);
else
- log_error("Error detaching loop devices: %s", strerror(-r));
+ log_error("Failed to detach loop devices: %s", strerror(-r));
}
if (need_dm_detach) {
if (r == 0)
need_dm_detach = false;
else if (r > 0)
- log_warning("Not all dm devices detached, %d left.", r);
+ log_warning("Not all DM devices detached, %d left.", r);
else
- log_error("Error detaching dm devices: %s", strerror(-r));
+ log_error("Failed to detach DM devices: %s", strerror(-r));
}
if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach)
if (killed_everbody) {
/* Hmm, we already killed everybody,
* let's just give up */
- log_error("Cannot finalize all filesystems and devices, giving up.");
+ log_error("Cannot finalize remaining file systems and devices, giving up.");
break;
}
- log_warning("Cannot finalize filesystems and devices, trying to kill remaining processes.");
- rescue_send_signal(SIGTERM);
- rescue_send_signal(SIGKILL);
+ log_warning("Cannot finalize remaining file systems and devices, trying to kill remaining processes.");
+ ultimate_send_signal(SIGTERM);
+ ultimate_send_signal(SIGKILL);
killed_everbody = true;
}
- log_debug("Couldn't finalize filesystems and devices after %u retries, trying again.", retries+1);
+ log_debug("Couldn't finalize remaining file systems and devices after %u retries, trying again.", retries+1);
}
if (retries >= FINALIZE_ATTEMPTS)
- log_error("Too many interations, giving up.");
+ log_error("Too many iterations, giving up.");
+
+ execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, NULL);
+
+ /* If we are in a container, just exit, this will kill our
+ * container for good. */
+ if (in_container) {
+ log_error("Exiting container.");
+ exit(0);
+ }
sync();
log_warning("kexec failed. Falling back to normal reboot.");
} else {
/* Child */
- const char *args[5] = { KEXEC_BINARY_PATH, "-e", "-f", "-x", NULL };
+ const char *args[3] = { "/sbin/kexec", "-e", NULL };
execv(args[0], (char * const *) args);
return EXIT_FAILURE;
}
r = -errno;
error:
- sync();
log_error("Critical error while doing system shutdown: %s", strerror(-r));
freeze();
~ianmdlvl / elogind.git / blobdiff