-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/reboot.h>
-#include <linux/reboot.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <sys/mount.h>
-#include <sys/syscall.h>
-#include <fcntl.h>
-#include <dirent.h>
#include <errno.h>
-#include <unistd.h>
+#include <getopt.h>
+#include <linux/reboot.h>
#include <signal.h>
#include <stdbool.h>
#include <stdlib.h>
-#include <string.h>
-#include <getopt.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/reboot.h>
+#include <sys/stat.h>
+#include <unistd.h>
-#include "missing.h"
-#include "log.h"
+#include "alloc-util.h"
+#include "cgroup-util.h"
+#include "def.h"
+#include "exec-util.h"
#include "fileio.h"
+#include "killall.h"
+#include "log.h"
+#include "missing.h"
+#include "parse-util.h"
+#include "process-util.h"
+#include "string-util.h"
+#include "switch-root.h"
+#include "terminal-util.h"
#include "umount.h"
#include "util.h"
-#include "mkdir.h"
#include "virt.h"
#include "watchdog.h"
-#include "killall.h"
-#include "cgroup-util.h"
-#include "def.h"
-#include "switch-root.h"
#define FINALIZE_ATTEMPTS 50
static char* arg_verb;
+static uint8_t arg_exit_code;
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_LOG_TARGET,
ARG_LOG_COLOR,
ARG_LOG_LOCATION,
+ ARG_EXIT_CODE,
};
static const struct option options[] = {
{ "log-target", required_argument, NULL, ARG_LOG_TARGET },
{ "log-color", optional_argument, NULL, ARG_LOG_COLOR },
{ "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
+ { "exit-code", required_argument, NULL, ARG_EXIT_CODE },
{}
};
break;
+ case ARG_EXIT_CODE:
+ r = safe_atou8(optarg, &arg_exit_code);
+ if (r < 0)
+ log_error("Failed to parse exit code %s, ignoring", optarg);
+
+ break;
+
case '\001':
if (!arg_verb)
arg_verb = optarg;
}
static int switch_root_initramfs(void) {
- if (mount("/run/initramfs", "/run/initramfs", NULL, MS_BIND, NULL) < 0) {
- log_error("Failed to mount bind /run/initramfs on /run/initramfs: %m");
- return -errno;
- }
+ if (mount("/run/initramfs", "/run/initramfs", NULL, MS_BIND, NULL) < 0)
+ return log_error_errno(errno, "Failed to mount bind /run/initramfs on /run/initramfs: %m");
- if (mount(NULL, "/run/initramfs", NULL, MS_PRIVATE, NULL) < 0) {
- log_error("Failed to make /run/initramfs private mount: %m");
- return -errno;
- }
+ if (mount(NULL, "/run/initramfs", NULL, MS_PRIVATE, NULL) < 0)
+ return log_error_errno(errno, "Failed to make /run/initramfs private mount: %m");
- /* switch_root with MS_BIND, because there might still be processes lurking around, which have open file desriptors.
+ /* switch_root with MS_BIND, because there might still be processes lurking around, which have open file descriptors.
* /run/initramfs/shutdown will take care of these.
* Also do not detach the old root, because /run/initramfs/shutdown needs to access it.
*/
return switch_root("/run/initramfs", "/oldroot", false, MS_BIND);
}
-
int main(int argc, char *argv[]) {
bool need_umount, need_swapoff, need_loop_detach, need_dm_detach;
bool in_container, use_watchdog = false;
char *arguments[3];
unsigned retries;
int cmd, r;
+ static const char* const dirs[] = {SYSTEM_SHUTDOWN_PATH, NULL};
log_parse_environment();
r = parse_argv(argc, argv);
umask(0022);
- if (getpid() != 1) {
+ if (getpid_cached() != 1) {
log_error("Not executed by init (PID 1).");
r = -EPERM;
goto error;
cmd = RB_HALT_SYSTEM;
else if (streq(arg_verb, "kexec"))
cmd = LINUX_REBOOT_CMD_KEXEC;
+ else if (streq(arg_verb, "exit"))
+ cmd = 0; /* ignored, just checking that arg_verb is valid */
else {
r = -EINVAL;
log_error("Unknown action '%s'.", arg_verb);
goto error;
}
- cg_get_root_path(&cgroup);
+ (void) cg_get_root_path(&cgroup);
+ in_container = detect_container() > 0;
use_watchdog = !!getenv("WATCHDOG_USEC");
- /* lock us into memory */
+ /* Lock us into memory */
mlockall(MCL_CURRENT|MCL_FUTURE);
+ /* Synchronize everything that is not written to disk yet at this point already. This is a good idea so that
+ * slow IO is processed here already and the final process killing spree is not impacted by processes
+ * desperately trying to sync IO to disk within their timeout. */
+ if (!in_container)
+ sync();
+
log_info("Sending SIGTERM to remaining processes...");
broadcast_signal(SIGTERM, true, true);
log_info("Sending SIGKILL to remaining processes...");
broadcast_signal(SIGKILL, true, false);
- in_container = detect_container(NULL) > 0;
-
need_umount = !in_container;
need_swapoff = !in_container;
need_loop_detach = !in_container;
} else if (r > 0)
log_info("Not all file systems unmounted, %d left.", r);
else
- log_error("Failed to unmount file systems: %s", strerror(-r));
+ log_error_errno(r, "Failed to unmount file systems: %m");
}
if (need_swapoff) {
} else if (r > 0)
log_info("Not all swaps deactivated, %d left.", r);
else
- log_error("Failed to deactivate swaps: %s", strerror(-r));
+ log_error_errno(r, "Failed to deactivate swaps: %m");
}
if (need_loop_detach) {
} else if (r > 0)
log_info("Not all loop devices detached, %d left.", r);
else
- log_error("Failed to detach loop devices: %s", strerror(-r));
+ log_error_errno(r, "Failed to detach loop devices: %m");
}
if (need_dm_detach) {
} else if (r > 0)
log_info("Not all DM devices detached, %d left.", r);
else
- log_error("Failed to detach DM devices: %s", strerror(-r));
+ log_error_errno(r, "Failed to detach DM devices: %m");
}
if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) {
arguments[0] = NULL;
arguments[1] = arg_verb;
arguments[2] = NULL;
- execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, DEFAULT_TIMEOUT_USEC, arguments);
+ execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments);
if (!in_container && !in_initrd() &&
access("/run/initramfs/shutdown", X_OK) == 0) {
"Returning to initrd...");
execv("/shutdown", argv);
- log_error("Failed to execute shutdown binary: %m");
+ log_error_errno(errno, "Failed to execute shutdown binary: %m");
} else
- log_error("Failed to switch root to \"/run/initramfs\": %s", strerror(-r));
+ log_error_errno(r, "Failed to switch root to \"/run/initramfs\": %m");
}
need_loop_detach ? " loop devices," : "",
need_dm_detach ? " DM devices," : "");
- /* The kernel will automaticall flush ATA disks and suchlike
- * on reboot(), but the file systems need to be synce'd
- * explicitly in advance. So let's do this here, but not
- * needlessly slow down containers. */
+ /* The kernel will automatically flush ATA disks and suchlike on reboot(), but the file systems need to be
+ * sync'ed explicitly in advance. So let's do this here, but not needlessly slow down containers. Note that we
+ * sync'ed things already once above, but we did some more work since then which might have caused IO, hence
+ * let's doit once more. */
if (!in_container)
sync();
+ if (streq(arg_verb, "exit")) {
+ if (in_container)
+ exit(arg_exit_code);
+ else {
+ /* We cannot exit() on the host, fallback on another
+ * method. */
+ cmd = RB_POWER_OFF;
+ }
+ }
+
switch (cmd) {
case LINUX_REBOOT_CMD_KEXEC:
pid = fork();
if (pid < 0)
- log_error("Failed to fork: %m");
+ log_error_errno(errno, "Failed to fork: %m");
else if (pid == 0) {
const char * const args[] = {
execv(args[0], (char * const *) args);
_exit(EXIT_FAILURE);
} else
- wait_for_terminate_and_warn("kexec", pid);
+ wait_for_terminate_and_warn("kexec", pid, true);
}
cmd = RB_AUTOBOOT;
if (!in_container) {
_cleanup_free_ char *param = NULL;
- if (read_one_line_file(REBOOT_PARAM_FILE, ¶m) >= 0) {
+ r = read_one_line_file("/run/systemd/reboot-param", ¶m);
+ if (r < 0 && r != -ENOENT)
+ log_warning_errno(r, "Failed to read reboot parameter file: %m");
+
+ if (!isempty(param)) {
log_info("Rebooting with argument '%s'.", param);
syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, param);
+ log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
}
}
exit(0);
}
- log_error("Failed to invoke reboot(): %m");
- r = -errno;
+ r = log_error_errno(errno, "Failed to invoke reboot(): %m");
error:
- log_emergency("Critical error while doing system shutdown: %s", strerror(-r));
-
+ log_emergency_errno(r, "Critical error while doing system shutdown: %m");
freeze();
}
projects / thirdparty / systemd.git / blobdiff