X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Fshutdown.c;h=7ef671ad0f56f854225d6420b2d5ca39decbe95f;hp=fe7a0739db8d1feaab1e8ade3cfb5f7977fa9739;hb=638ca89c53e2b897cfb3f627f4acbc7d09af2f4c;hpb=8577e67245fc5d38bfdc32349388769895202bc4 diff --git a/src/core/shutdown.c b/src/core/shutdown.c index fe7a0739d..7ef671ad0 100644 --- a/src/core/shutdown.c +++ b/src/core/shutdown.c @@ -24,7 +24,6 @@ #include #include #include -#include #include #include #include @@ -36,6 +35,7 @@ #include #include #include +#include #include "missing.h" #include "log.h" @@ -46,9 +46,98 @@ #include "virt.h" #include "watchdog.h" #include "killall.h" +#include "cgroup-util.h" +#include "def.h" #define FINALIZE_ATTEMPTS 50 +static char* arg_verb; + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_LOG_LEVEL = 0x100, + ARG_LOG_TARGET, + ARG_LOG_COLOR, + ARG_LOG_LOCATION, + }; + + static const struct option options[] = { + { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, + { "log-target", required_argument, NULL, ARG_LOG_TARGET }, + { "log-color", optional_argument, NULL, ARG_LOG_COLOR }, + { "log-location", optional_argument, NULL, ARG_LOG_LOCATION }, + {} + }; + + int c, r; + + assert(argc >= 1); + assert(argv); + + opterr = 0; + + while ((c = getopt_long(argc, argv, ":", options, NULL)) >= 0) + switch (c) { + + case ARG_LOG_LEVEL: + r = log_set_max_level_from_string(optarg); + if (r < 0) + log_error("Failed to parse log level %s, ignoring.", optarg); + + break; + + case ARG_LOG_TARGET: + r = log_set_target_from_string(optarg); + if (r < 0) + log_error("Failed to parse log target %s, ignoring", optarg); + + break; + + case ARG_LOG_COLOR: + + if (optarg) { + r = log_show_color_from_string(optarg); + if (r < 0) + log_error("Failed to parse log color setting %s, ignoring", optarg); + } else + log_show_color(true); + + break; + + case ARG_LOG_LOCATION: + if (optarg) { + r = log_show_location_from_string(optarg); + if (r < 0) + log_error("Failed to parse log location setting %s, ignoring", optarg); + } else + log_show_location(true); + + break; + + case '?': + log_error("Unknown option %s.", argv[optind-1]); + return -EINVAL; + + case ':': + log_error("Missing argument to %s.", argv[optind-1]); + return -EINVAL; + + default: + assert_not_reached("Unhandled option code."); + } + + if (optind >= argc) { + log_error("Verb argument missing."); + return -EINVAL; + } + + arg_verb = argv[optind]; + + if (optind + 1 < argc) + log_error("Excess arguments, ignoring"); + return 0; +} + static int prepare_new_root(void) { static const char dirs[] = "/run/initramfs/oldroot\0" @@ -131,77 +220,60 @@ static int pivot_to_new_root(void) { } int main(int argc, char *argv[]) { - _cleanup_free_ char *line = NULL; - 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 *cgroup = NULL; char *arguments[3]; + unsigned retries; + int cmd, r; - /* suppress shutdown status output if 'quiet' is used */ - r = read_one_line_file("/proc/cmdline", &line); - if (r >= 0) { - char *w, *state; - size_t l; - - FOREACH_WORD_QUOTED(w, l, line, state) { - _cleanup_free_ char *word; + log_parse_environment(); + r = parse_argv(argc, argv); + if (r < 0) + goto error; - word = strndup(w, l); - if (!word) - break; + /* journald will die if not gone yet. The log target defaults + * to console, but may have been changed by commandline options. */ - if (streq(word, "quiet")) { - log_set_max_level(LOG_WARNING); - break; - } - } - } - - log_parse_environment(); - log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */ + log_close_console(); /* force reopen of /dev/console */ log_open(); umask(0022); if (getpid() != 1) { - log_error("Not executed by init (pid 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")) + if (streq(arg_verb, "reboot")) cmd = RB_AUTOBOOT; - else if (streq(argv[1], "poweroff")) + else if (streq(arg_verb, "poweroff")) cmd = RB_POWER_OFF; - else if (streq(argv[1], "halt")) + else if (streq(arg_verb, "halt")) cmd = RB_HALT_SYSTEM; - else if (streq(argv[1], "kexec")) + else if (streq(arg_verb, "kexec")) cmd = LINUX_REBOOT_CMD_KEXEC; else { - log_error("Unknown action '%s'.", argv[1]); 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); + 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; @@ -216,6 +288,13 @@ 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); @@ -287,19 +366,20 @@ int main(int argc, char *argv[]) { log_info("Storage is finalized."); arguments[0] = NULL; - arguments[1] = argv[1]; + arguments[1] = arg_verb; arguments[2] = NULL; - execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, arguments); + execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, DEFAULT_TIMEOUT_USEC, arguments); if (!in_container && !in_initrd() && access("/run/initramfs/shutdown", X_OK) == 0) { if (prepare_new_root() >= 0 && pivot_to_new_root() >= 0) { + arguments[0] = (char*) "/shutdown"; log_info("Returning to initrd..."); - execv("/shutdown", argv); + execv("/shutdown", arguments); log_error("Failed to execute shutdown binary: %m"); } } @@ -311,35 +391,69 @@ 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, ¶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_error("Exiting container."); + log_info("Exiting container."); exit(0); } @@ -350,5 +464,4 @@ int main(int argc, char *argv[]) { log_error("Critical error while doing system shutdown: %s", strerror(-r)); freeze(); - return EXIT_FAILURE; }