int main(int argc, char *argv[]) { int r = 0; if (argc > 1 && argc != 4) { log_error("This program takes three or no arguments."); return EXIT_FAILURE; } if (argc > 1) arg_dest = argv[1]; log_set_prohibit_ipc(true); log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); umask(0022); /* Don't even consider resuming outside of initramfs. */ if (!in_initrd()) return EXIT_SUCCESS; r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); if (r < 0) log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); r = process_resume(); free(arg_resume_device); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }
int main(int argc, char *argv[]) { int ret = EXIT_SUCCESS; if (argc > 1 && argc != 4) { log_error("This program takes three or no arguments."); return EXIT_FAILURE; } if (argc > 1) arg_dest = argv[1]; log_set_prohibit_ipc(true); log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); umask(0022); if (access(RC_LOCAL_SCRIPT_PATH_START, X_OK) >= 0) { log_debug("Automatically adding rc-local.service."); if (add_symlink("rc-local.service", "multi-user.target") < 0) ret = EXIT_FAILURE; } if (access(RC_LOCAL_SCRIPT_PATH_STOP, X_OK) >= 0) { log_debug("Automatically adding halt-local.service."); if (add_symlink("halt-local.service", "final.target") < 0) ret = EXIT_FAILURE; } return ret; }
int main(int argc, char *argv[]) { int r; log_set_prohibit_ipc(true); log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); umask(0022); r = parse_argv(argc, argv); if (r <= 0) return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; if (streq(argv[optind], "collect")) return main_collect(argv[optind+1]); else if (streq(argv[optind], "replay")) return main_replay(argv[optind+1]); else if (streq(argv[optind], "analyze")) return main_analyze(argv[optind+1]); log_error("Unknown verb %s.", argv[optind]); return EXIT_FAILURE; }
int main(int argc, char *argv[]) { Server server; int r; if (argc > 1) { log_error("This program does not take arguments."); return EXIT_FAILURE; } log_set_prohibit_ipc(true); log_set_target(LOG_TARGET_AUTO); log_set_facility(LOG_SYSLOG); log_parse_environment(); log_open(); umask(0022); sigbus_install(); r = server_init(&server); if (r < 0) goto finish; server_vacuum(&server, false); server_flush_to_var(&server, true); server_flush_dev_kmsg(&server); log_debug("systemd-journald running as pid "PID_FMT, getpid_cached()); server_driver_message(&server, 0, "MESSAGE_ID=" SD_MESSAGE_JOURNAL_START_STR, LOG_MESSAGE("Journal started"), NULL); /* Make sure to send the usage message *after* flushing the * journal so entries from the runtime journals are ordered * before this message. See #4190 for some details. */ server_space_usage_message(&server, NULL); for (;;) { usec_t t = USEC_INFINITY, n; r = sd_event_get_state(server.event); if (r < 0) goto finish; if (r == SD_EVENT_FINISHED) break; n = now(CLOCK_REALTIME); if (server.max_retention_usec > 0 && server.oldest_file_usec > 0) { /* The retention time is reached, so let's vacuum! */ if (server.oldest_file_usec + server.max_retention_usec < n) { log_info("Retention time reached."); server_rotate(&server); server_vacuum(&server, false); continue; } /* Calculate when to rotate the next time */ t = server.oldest_file_usec + server.max_retention_usec - n; } #if HAVE_GCRYPT if (server.system_journal) { usec_t u; if (journal_file_next_evolve_usec(server.system_journal, &u)) { if (n >= u) t = 0; else t = MIN(t, u - n); } } #endif r = sd_event_run(server.event, t); if (r < 0) { log_error_errno(r, "Failed to run event loop: %m"); goto finish; } server_maybe_append_tags(&server); server_maybe_warn_forward_syslog_missed(&server); } log_debug("systemd-journald stopped as pid "PID_FMT, getpid_cached()); server_driver_message(&server, 0, "MESSAGE_ID=" SD_MESSAGE_JOURNAL_STOP_STR, LOG_MESSAGE("Journal stopped"), NULL); finish: server_done(&server); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }
int main(int argc, char *argv[]) { bool need_umount, need_swapoff, need_loop_detach, need_dm_detach; bool in_container, use_watchdog = false, can_initrd; _cleanup_free_ char *cgroup = NULL; char *arguments[3]; int cmd, r, umount_log_level = LOG_INFO; static const char* const dirs[] = {SYSTEM_SHUTDOWN_PATH, NULL}; char *watchdog_device; /* The log target defaults to console, but the original systemd process will pass its log target in through a * command line argument, which will override this default. Also, ensure we'll never log to the journal or * syslog, as these logging daemons are either already dead or will die very soon. */ log_set_target(LOG_TARGET_CONSOLE); log_set_prohibit_ipc(true); log_parse_environment(); r = parse_argv(argc, argv); if (r < 0) goto error; log_open(); umask(0022); if (getpid_cached() != 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 if (streq(arg_verb, "exit")) cmd = 0; /* ignored, just checking that arg_verb is valid */ else { log_error("Unknown action '%s'.", arg_verb); r = -EINVAL; goto error; } (void) cg_get_root_path(&cgroup); in_container = detect_container() > 0; use_watchdog = getenv("WATCHDOG_USEC"); watchdog_device = getenv("WATCHDOG_DEVICE"); if (watchdog_device) { r = watchdog_set_device(watchdog_device); if (r < 0) log_warning_errno(r, "Failed to set watchdog device to %s, ignoring: %m", watchdog_device); } /* Lock us into memory */ (void) 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. Do not remove this sync, data corruption will * result. */ if (!in_container) sync_with_progress(); disable_coredumps(); log_info("Sending SIGTERM to remaining processes..."); broadcast_signal(SIGTERM, true, true, arg_timeout); log_info("Sending SIGKILL to remaining processes..."); broadcast_signal(SIGKILL, true, false, arg_timeout); need_umount = !in_container; need_swapoff = !in_container; need_loop_detach = !in_container; need_dm_detach = !in_container; can_initrd = !in_container && !in_initrd() && access("/run/initramfs/shutdown", X_OK) == 0; /* Unmount all mountpoints, swaps, and loopback devices */ for (;;) { 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, umount_log_level); 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_errno(r, "Failed to unmount file systems: %m"); } 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_errno(r, "Failed to deactivate swaps: %m"); } if (need_loop_detach) { log_info("Detaching loop devices."); r = loopback_detach_all(&changed, umount_log_level); 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_errno(r, "Failed to detach loop devices: %m"); } if (need_dm_detach) { log_info("Detaching DM devices."); r = dm_detach_all(&changed, umount_log_level); 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_errno(r, "Failed to detach DM devices: %m"); } if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) { log_info("All filesystems, swaps, loop devices and DM devices detached."); /* Yay, done */ break; } if (!changed && umount_log_level == LOG_INFO && !can_initrd) { /* There are things we cannot get rid of. Loop one more time * with LOG_ERR to inform the user. Note that we don't need * to do this if there is a initrd to switch to, because that * one is likely to get rid of the remounting mounts. If not, * it will log about them. */ umount_log_level = LOG_ERR; continue; } /* 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," : ""); break; } log_debug("Couldn't finalize remaining %s%s%s%s trying again.", need_umount ? " file systems," : "", need_swapoff ? " swap devices," : "", need_loop_detach ? " loop devices," : "", need_dm_detach ? " DM devices," : ""); } /* We're done with the watchdog. */ watchdog_free_device(); arguments[0] = NULL; arguments[1] = arg_verb; arguments[2] = NULL; execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL); (void) rlimit_nofile_safe(); if (can_initrd) { r = switch_root_initramfs(); if (r >= 0) { argv[0] = (char*) "/shutdown"; (void) setsid(); (void) make_console_stdio(); log_info("Successfully changed into root pivot.\n" "Returning to initrd..."); execv("/shutdown", argv); log_error_errno(errno, "Failed to execute shutdown binary: %m"); } else log_error_errno(r, "Failed to switch root to \"/run/initramfs\": %m"); } 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 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 do it once more. Do not remove this sync, data corruption will result. */ if (!in_container) sync_with_progress(); if (streq(arg_verb, "exit")) { if (in_container) return arg_exit_code; cmd = RB_POWER_OFF; /* We cannot exit() on the host, fallback on another method. */ } switch (cmd) { case LINUX_REBOOT_CMD_KEXEC: if (!in_container) { /* We cheat and exec kexec to avoid doing all its work */ log_info("Rebooting with kexec."); r = safe_fork("(sd-kexec)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_LOG|FORK_WAIT, NULL); if (r == 0) { const char * const args[] = { KEXEC, "-e", NULL }; /* Child */ execv(args[0], (char * const *) args); _exit(EXIT_FAILURE); } /* If we are still running, then the kexec can't have worked, let's fall through */ } cmd = RB_AUTOBOOT; _fallthrough_; case RB_AUTOBOOT: (void) reboot_with_parameter(REBOOT_LOG); 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"); } (void) 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."); return EXIT_SUCCESS; } r = log_error_errno(errno, "Failed to invoke reboot(): %m"); error: log_emergency_errno(r, "Critical error while doing system shutdown: %m"); freeze(); }