shutdown: during final killing spree also send SIGHUP in addition to SIGTERM to deal...

[elogind.git] / src / core / shutdown.c

diff --git a/src/core/shutdown.c b/src/core/shutdown.c
index 0b0e0c3d476c3d10c74ce0044706adf1c291195e..31129b7697edf01ae5de5787b7c5b75816fe4e64 100644 (file)
--- a/src/core/shutdown.c
+++ b/src/core/shutdown.c
@@ -24,7 +24,6 @@
 #include <sys/reboot.h>
 #include <linux/reboot.h>
 #include <sys/wait.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mount.h>
 #include <sys/syscall.h>
@@ -39,12 +38,15 @@
 
 #include "missing.h"
 #include "log.h"
+#include "fileio.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"
 
 #define FINALIZE_ATTEMPTS 50
 
@@ -130,11 +132,26 @@ static int pivot_to_new_root(void) {
 }
 
 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 in_container, use_watchdog = false;
+        _cleanup_free_ char *line = NULL, *cgroup = NULL;
         char *arguments[3];
+        unsigned retries;
+        int cmd, r;
+
+        /* suppress shutdown status output if 'quiet' is used  */
+        r = proc_cmdline(&line);
+        if (r > 0) {
+                char *w, *state;
+                size_t l;
+
+                FOREACH_WORD_QUOTED(w, l, line, state) {
+                        if (l == 5 && memcmp(w, "quiet", 5) == 0) {
+                                log_set_max_level(LOG_WARNING);
+                                break;
+                        }
+                }
+        }
 
         log_parse_environment();
         log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
@@ -170,16 +187,18 @@ int main(int argc, char *argv[]) {
                 goto error;
         }
 
+        cg_get_root_path(&cgroup);
+
         use_watchdog = !!getenv("WATCHDOG_USEC");
 
         /* lock us into memory */
         mlockall(MCL_CURRENT|MCL_FUTURE);
 
         log_info("Sending SIGTERM to remaining processes...");
-        broadcast_signal(SIGTERM, true);
+        broadcast_signal(SIGTERM, true, true);
 
         log_info("Sending SIGKILL to remaining processes...");
-        broadcast_signal(SIGKILL, true);
+        broadcast_signal(SIGKILL, true, false);
 
         if (in_container) {
                 need_swapoff = false;
@@ -194,6 +213,13 @@ int main(int argc, char *argv[]) {
                 if (use_watchdog)
                         watchdog_ping();
 
+                /* Let's trim the cgroup tree on each iteration so
+                   that we leave an empty cgroup tree around, so that
+                   container managers get a nice notify event when we
+                   are down */
+                if (cgroup)
+                        cg_trim(SYSTEMD_CGROUP_CONTROLLER, cgroup, false);
+
                 if (need_umount) {
                         log_info("Unmounting file systems.");
                         r = umount_all(&changed);
@@ -261,6 +287,8 @@ int main(int argc, char *argv[]) {
 
         if (retries >= FINALIZE_ATTEMPTS)
                 log_error("Too many iterations, giving up.");
+        else
+                log_info("Storage is finalized.");
 
         arguments[0] = NULL;
         arguments[1] = argv[1];
@@ -272,6 +300,9 @@ int main(int argc, char *argv[]) {
 
                 if (prepare_new_root() >= 0 &&
                     pivot_to_new_root() >= 0) {
+
+                        log_info("Returning to initrd...");
+
                         execv("/shutdown", argv);
                         log_error("Failed to execute shutdown binary: %m");
                 }
@@ -284,35 +315,69 @@ 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] = { "/sbin/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 */
+
+        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);
         }