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; char *arguments[3]; log_parse_environment(); log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */ log_open(); umask(0022); if (getpid() != 1) { log_error("Not executed by init (pid 1)."); r = -EPERM; goto error; } if (argc != 2) { log_error("Invalid number of arguments."); r = -EINVAL; goto error; } in_container = detect_container(NULL) > 0; if (streq(argv[1], "reboot")) cmd = RB_AUTOBOOT; else if (streq(argv[1], "poweroff")) cmd = RB_POWER_OFF; else if (streq(argv[1], "halt")) cmd = RB_HALT_SYSTEM; else if (streq(argv[1], "kexec")) cmd = LINUX_REBOOT_CMD_KEXEC; else { log_error("Unknown action '%s'.", argv[1]); r = -EINVAL; goto error; } 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); log_info("Sending SIGKILL to remaining processes..."); broadcast_signal(SIGKILL, true); if (in_container) { need_swapoff = false; need_dm_detach = false; need_loop_detach = false; } /* Unmount all mountpoints, swaps, and loopback devices */ for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) { bool changed = false; if (use_watchdog) watchdog_ping(); if (need_umount) { log_info("Unmounting file systems."); r = umount_all(&changed); if (r == 0) need_umount = false; 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)); } if (need_swapoff) { log_info("Disabling swaps."); r = swapoff_all(&changed); if (r == 0) need_swapoff = false; else if (r > 0) log_info("Not all swaps are turned off, %d left.", r); else log_error("Failed to turn off swaps: %s", strerror(-r)); } if (need_loop_detach) { log_info("Detaching loop devices."); r = loopback_detach_all(&changed); if (r == 0) need_loop_detach = false; 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)); } if (need_dm_detach) { log_info("Detaching DM devices."); r = dm_detach_all(&changed); if (r == 0) need_dm_detach = false; else if (r > 0) log_warning("Not all DM devices detached, %d left.", r); else log_error("Failed to detach DM devices: %s", strerror(-r)); } if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) { if (retries > 0) log_info("All filesystems, swaps, loop devices, DM devices detached."); /* Yay, done */ break; } /* If in this iteration we didn't manage to * unmount/deactivate anything, we simply give up */ if (!changed) { log_error("Cannot finalize remaining file systems and devices, giving up."); break; } 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 iterations, giving up."); arguments[0] = NULL; arguments[1] = argv[1]; arguments[2] = NULL; execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, arguments); if (!in_container && access("/run/initramfs/shutdown", X_OK) == 0) { if (prepare_new_root() >= 0 && pivot_to_new_root() >= 0) { execv("/shutdown", argv); log_error("Failed to execute shutdown binary: %m"); } } if (cmd == LINUX_REBOOT_CMD_KEXEC) { if (!in_container) { /* We cheat and exec kexec to avoid doing all its work */ pid_t 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 { /* Child */ const char *args[3] = { "/sbin/kexec", "-e", NULL }; execv(args[0], (char * const *) args); return EXIT_FAILURE; } } cmd = RB_AUTOBOOT; } 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."); exit(0); } log_error("Failed to invoke reboot(): %m"); r = -errno; error: log_error("Critical error while doing system shutdown: %s", strerror(-r)); freeze(); return EXIT_FAILURE; }
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, in_container; log_parse_environment(); log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */ log_open(); if (getpid() != 1) { log_error("Not executed by init (pid 1)."); r = -EPERM; goto error; } if (argc != 2) { log_error("Invalid number of arguments."); r = -EINVAL; goto error; } in_container = detect_container(NULL) > 0; if (streq(argv[1], "reboot")) cmd = RB_AUTOBOOT; else if (streq(argv[1], "poweroff")) cmd = RB_POWER_OFF; else if (streq(argv[1], "halt")) cmd = RB_HALT_SYSTEM; else if (streq(argv[1], "kexec")) cmd = LINUX_REBOOT_CMD_KEXEC; else { log_error("Unknown action '%s'.", argv[1]); r = -EINVAL; goto error; } /* lock us into memory */ if (mlockall(MCL_CURRENT|MCL_FUTURE) != 0) log_warning("Cannot lock process memory: %m"); log_info("Sending SIGTERM to remaining processes..."); send_signal(SIGTERM); 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 file systems."); r = umount_all(&changed); if (r == 0) need_umount = false; 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)); } if (need_swapoff) { log_info("Disabling swaps."); r = swapoff_all(&changed); if (r == 0) need_swapoff = false; else if (r > 0) log_info("Not all swaps are turned off, %d left.", r); else log_error("Failed to turn off swaps: %s", strerror(-r)); } if (need_loop_detach) { log_info("Detaching loop devices."); r = loopback_detach_all(&changed); if (r == 0) need_loop_detach = false; 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)); } if (need_dm_detach) { log_info("Detaching DM devices."); r = dm_detach_all(&changed); if (r == 0) need_dm_detach = false; else if (r > 0) log_warning("Not all DM devices detached, %d left.", r); else log_error("Failed to detach DM devices: %s", strerror(-r)); } if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) /* Yay, done */ break; /* If in this iteration we didn't manage to * unmount/deactivate anything, we either kill more * processes, or simply give up */ if (!changed) { if (killed_everbody) { /* Hmm, we already killed everybody, * let's just give up */ log_error("Cannot finalize remaining file systems and devices, giving up."); break; } 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 remaining file systems and devices after %u retries, trying again.", retries+1); } if (retries >= FINALIZE_ATTEMPTS) 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(); if (cmd == LINUX_REBOOT_CMD_KEXEC) { /* We cheat and exec kexec to avoid doing all its work */ pid_t 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 { /* Child */ const char *args[3] = { "/sbin/kexec", "-e", NULL }; execv(args[0], (char * const *) args); return EXIT_FAILURE; } cmd = RB_AUTOBOOT; } reboot(cmd); log_error("Failed to invoke reboot(): %m"); r = -errno; error: log_error("Critical error while doing system shutdown: %s", strerror(-r)); freeze(); return EXIT_FAILURE; }
int main(int argc, char *argv[]) { bool need_umount, need_swapoff, need_loop_detach, need_dm_detach; bool in_container, use_watchdog = false; _cleanup_free_ char *cgroup = NULL; char *arguments[3]; unsigned retries; int cmd, r; log_parse_environment(); r = parse_argv(argc, argv); if (r < 0) goto error; /* The log target defaults to console, but may * have been changed by command line options. */ log_close_console(); /* force reopen of /dev/console */ log_open(); umask(0022); if (getpid() != 1) { log_error("Not executed by init (PID 1)."); r = -EPERM; goto error; } if (streq(arg_verb, "reboot")) cmd = RB_AUTOBOOT; else if (streq(arg_verb, "poweroff")) cmd = RB_POWER_OFF; else if (streq(arg_verb, "halt")) cmd = RB_HALT_SYSTEM; else if (streq(arg_verb, "kexec")) cmd = LINUX_REBOOT_CMD_KEXEC; else { r = -EINVAL; log_error("Unknown action '%s'.", arg_verb); 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, true); log_info("Sending SIGKILL to remaining processes..."); broadcast_signal(SIGKILL, true, false); in_container = detect_container(NULL) > 0; need_umount = true; need_swapoff = !in_container; need_loop_detach = !in_container; need_dm_detach = !in_container; /* Unmount all mountpoints, swaps, and loopback devices */ for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) { bool changed = false; 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); if (r == 0) { need_umount = false; log_info("All filesystems unmounted."); } 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)); } if (need_swapoff) { log_info("Deactivating swaps."); r = swapoff_all(&changed); if (r == 0) { need_swapoff = false; log_info("All swaps deactivated."); } else if (r > 0) log_info("Not all swaps deactivated, %d left.", r); else log_error("Failed to deactivate swaps: %s", strerror(-r)); } if (need_loop_detach) { log_info("Detaching loop devices."); r = loopback_detach_all(&changed); if (r == 0) { need_loop_detach = false; log_info("All loop devices detached."); } 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)); } if (need_dm_detach) { log_info("Detaching DM devices."); r = dm_detach_all(&changed); if (r == 0) { need_dm_detach = false; log_info("All DM devices detached."); } 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)); } if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) { if (retries > 0) log_info("All filesystems, swaps, loop devices, DM devices detached."); /* Yay, done */ goto initrd_jump; } /* If in this iteration we didn't manage to * unmount/deactivate anything, we simply give up */ if (!changed) { log_info("Cannot finalize remaining%s%s%s%s continuing.", need_umount ? " file systems," : "", need_swapoff ? " swap devices," : "", need_loop_detach ? " loop devices," : "", need_dm_detach ? " DM devices," : ""); goto initrd_jump; } log_debug("After %u retries, couldn't finalize remaining %s%s%s%s trying again.", retries + 1, need_umount ? " file systems," : "", need_swapoff ? " swap devices," : "", need_loop_detach ? " loop devices," : "", need_dm_detach ? " DM devices," : ""); } log_error("Too many iterations, giving up."); initrd_jump: arguments[0] = NULL; arguments[1] = arg_verb; arguments[2] = NULL; execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, DEFAULT_TIMEOUT_USEC, arguments); if (need_umount || need_swapoff || need_loop_detach || need_dm_detach) log_error("Failed to finalize %s%s%s%s ignoring", need_umount ? " file systems," : "", need_swapoff ? " swap devices," : "", 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. */ if (!in_container) sync(); switch (cmd) { case LINUX_REBOOT_CMD_KEXEC: if (!in_container) { /* We cheat and exec kexec to avoid doing all its work */ pid_t pid; log_info("Rebooting with kexec."); pid = fork(); if (pid < 0) log_error("Failed to fork: %m"); else if (pid == 0) { const char * const args[] = { KEXEC, "-e", NULL }; /* Child */ execv(args[0], (char * const *) args); _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, ¶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_info("Exiting container."); exit(0); } log_error("Failed to invoke reboot(): %m"); r = -errno; error: log_error("Critical error while doing system shutdown: %s", strerror(-r)); freeze(); }
int main(int argc, char *argv[]) { const char *verb; char* arguments[4]; int r; FILE *f; log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); if (argc != 2) { log_error("Invalid number of arguments."); r = -EINVAL; goto finish; } if (streq(argv[1], "suspend")) verb = "mem"; else if (streq(argv[1], "hibernate")) verb = "disk"; else { log_error("Unknown action '%s'.", argv[1]); r = -EINVAL; goto finish; } f = fopen("/sys/power/state", "we"); if (!f) { log_error("Failed to open /sys/power/state: %m"); r = -errno; goto finish; } arguments[0] = NULL; arguments[1] = (char*) "pre"; arguments[2] = argv[1]; arguments[3] = NULL; execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments); if (streq(argv[1], "suspend")) log_info("Suspending system..."); else log_info("Hibernating system..."); fputs(verb, f); fputc('\n', f); fflush(f); r = ferror(f) ? -errno : 0; if (streq(argv[1], "suspend")) log_info("System resumed."); else log_info("System thawed."); arguments[1] = (char*) "post"; execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments); fclose(f); finish: return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }