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Diffstat (limited to 'src/grp-system/systemd/main.c')
| -rw-r--r-- | src/grp-system/systemd/main.c | 2204 |
1 files changed, 2204 insertions, 0 deletions
diff --git a/src/grp-system/systemd/main.c b/src/grp-system/systemd/main.c new file mode 100644 index 0000000000..be97cef6a1 --- /dev/null +++ b/src/grp-system/systemd/main.c @@ -0,0 +1,2204 @@ +/*** + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <signal.h> +#include <stdio.h> +#include <string.h> +#include <sys/mount.h> +#include <sys/prctl.h> +#include <sys/reboot.h> +#include <sys/stat.h> +#include <unistd.h> +#ifdef HAVE_SECCOMP +#include <seccomp.h> +#endif +#ifdef HAVE_VALGRIND_VALGRIND_H +#include <valgrind/valgrind.h> +#endif + +#include <systemd/sd-bus.h> +#include <systemd/sd-daemon.h> + +#include "core/dbus-manager.h" +#include "core/hostname-setup.h" +#include "core/ima-setup.h" +#include "core/killall.h" +#include "core/kmod-setup.h" +#include "core/load-fragment.h" +#include "core/loopback-setup.h" +#include "core/machine-id-setup.h" +#include "core/manager.h" +#include "core/mount-setup.h" +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/architecture.h" +#include "systemd-basic/build.h" +#include "systemd-basic/capability-util.h" +#include "systemd-basic/clock-util.h" +#include "systemd-basic/cpu-set-util.h" +#include "systemd-basic/def.h" +#include "systemd-basic/env-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fileio.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/fs-util.h" +#include "systemd-basic/log.h" +#include "systemd-basic/missing.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/proc-cmdline.h" +#include "systemd-basic/process-util.h" +#include "systemd-basic/raw-clone.h" +#include "systemd-basic/rlimit-util.h" +#include "systemd-shared/conf-parser.h" +#include "systemd-shared/fdset.h" +#include "systemd-shared/pager.h" +#ifdef HAVE_SECCOMP +#include "systemd-shared/seccomp-util.h" +#endif +#include "core/emergency-action.h" +#include "core/selinux-setup.h" +#include "core/smack-setup.h" +#include "systemd-basic/selinux-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/stat-util.h" +#include "systemd-basic/stdio-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/umask-util.h" +#include "systemd-basic/user-util.h" +#include "systemd-basic/virt.h" +#include "systemd-shared/switch-root.h" +#include "systemd-shared/watchdog.h" + +static enum { + ACTION_RUN, + ACTION_HELP, + ACTION_VERSION, + ACTION_TEST, + ACTION_DUMP_CONFIGURATION_ITEMS +} arg_action = ACTION_RUN; +static char *arg_default_unit = NULL; +static bool arg_system = false; +static bool arg_dump_core = true; +static int arg_crash_chvt = -1; +static bool arg_crash_shell = false; +static bool arg_crash_reboot = false; +static bool arg_confirm_spawn = false; +static ShowStatus arg_show_status = _SHOW_STATUS_UNSET; +static bool arg_switched_root = false; +static bool arg_no_pager = false; +static char ***arg_join_controllers = NULL; +static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL; +static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT; +static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC; +static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC; +static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC; +static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL; +static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST; +static usec_t arg_runtime_watchdog = 0; +static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE; +static char **arg_default_environment = NULL; +static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {}; +static uint64_t arg_capability_bounding_set = CAP_ALL; +static nsec_t arg_timer_slack_nsec = NSEC_INFINITY; +static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE; +static Set* arg_syscall_archs = NULL; +static FILE* arg_serialization = NULL; +static bool arg_default_cpu_accounting = false; +static bool arg_default_io_accounting = false; +static bool arg_default_blockio_accounting = false; +static bool arg_default_memory_accounting = false; +static bool arg_default_tasks_accounting = true; +static uint64_t arg_default_tasks_max = UINT64_MAX; +static sd_id128_t arg_machine_id = {}; +static EmergencyAction arg_cad_burst_action = EMERGENCY_ACTION_REBOOT_FORCE; + +noreturn static void freeze_or_reboot(void) { + + if (arg_crash_reboot) { + log_notice("Rebooting in 10s..."); + (void) sleep(10); + + log_notice("Rebooting now..."); + (void) reboot(RB_AUTOBOOT); + log_emergency_errno(errno, "Failed to reboot: %m"); + } + + log_emergency("Freezing execution."); + freeze(); +} + +noreturn static void crash(int sig) { + struct sigaction sa; + pid_t pid; + + if (getpid() != 1) + /* Pass this on immediately, if this is not PID 1 */ + (void) raise(sig); + else if (!arg_dump_core) + log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig)); + else { + sa = (struct sigaction) { + .sa_handler = nop_signal_handler, + .sa_flags = SA_NOCLDSTOP|SA_RESTART, + }; + + /* We want to wait for the core process, hence let's enable SIGCHLD */ + (void) sigaction(SIGCHLD, &sa, NULL); + + pid = raw_clone(SIGCHLD); + if (pid < 0) + log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig)); + else if (pid == 0) { + /* Enable default signal handler for core dump */ + + sa = (struct sigaction) { + .sa_handler = SIG_DFL, + }; + (void) sigaction(sig, &sa, NULL); + + /* Don't limit the coredump size */ + (void) setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY)); + + /* Just to be sure... */ + (void) chdir("/"); + + /* Raise the signal again */ + pid = raw_getpid(); + (void) kill(pid, sig); /* raise() would kill the parent */ + + assert_not_reached("We shouldn't be here..."); + _exit(EXIT_FAILURE); + } else { + siginfo_t status; + int r; + + /* Order things nicely. */ + r = wait_for_terminate(pid, &status); + if (r < 0) + log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig)); + else if (status.si_code != CLD_DUMPED) + log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).", + signal_to_string(sig), + pid, sigchld_code_to_string(status.si_code), + status.si_status, + strna(status.si_code == CLD_EXITED + ? exit_status_to_string(status.si_status, EXIT_STATUS_MINIMAL) + : signal_to_string(status.si_status))); + else + log_emergency("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid); + } + } + + if (arg_crash_chvt >= 0) + (void) chvt(arg_crash_chvt); + + sa = (struct sigaction) { + .sa_handler = SIG_IGN, + .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART, + }; + + /* Let the kernel reap children for us */ + (void) sigaction(SIGCHLD, &sa, NULL); + + if (arg_crash_shell) { + log_notice("Executing crash shell in 10s..."); + (void) sleep(10); + + pid = raw_clone(SIGCHLD); + if (pid < 0) + log_emergency_errno(errno, "Failed to fork off crash shell: %m"); + else if (pid == 0) { + (void) setsid(); + (void) make_console_stdio(); + (void) execle("/bin/sh", "/bin/sh", NULL, environ); + + log_emergency_errno(errno, "execle() failed: %m"); + _exit(EXIT_FAILURE); + } else { + log_info("Spawned crash shell as PID "PID_FMT".", pid); + (void) wait_for_terminate(pid, NULL); + } + } + + freeze_or_reboot(); +} + +static void install_crash_handler(void) { + static const struct sigaction sa = { + .sa_handler = crash, + .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */ + }; + int r; + + /* We ignore the return value here, since, we don't mind if we + * cannot set up a crash handler */ + r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1); + if (r < 0) + log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m"); +} + +static int console_setup(void) { + _cleanup_close_ int tty_fd = -1; + int r; + + tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); + if (tty_fd < 0) + return log_error_errno(tty_fd, "Failed to open /dev/console: %m"); + + /* We don't want to force text mode. plymouth may be showing + * pictures already from initrd. */ + r = reset_terminal_fd(tty_fd, false); + if (r < 0) + return log_error_errno(r, "Failed to reset /dev/console: %m"); + + return 0; +} + +static int parse_crash_chvt(const char *value) { + int b; + + if (safe_atoi(value, &arg_crash_chvt) >= 0) + return 0; + + b = parse_boolean(value); + if (b < 0) + return b; + + if (b > 0) + arg_crash_chvt = 0; /* switch to where kmsg goes */ + else + arg_crash_chvt = -1; /* turn off switching */ + + return 0; +} + +static int set_machine_id(const char *m) { + sd_id128_t t; + assert(m); + + if (sd_id128_from_string(m, &t) < 0) + return -EINVAL; + + if (sd_id128_is_null(t)) + return -EINVAL; + + arg_machine_id = t; + return 0; +} + +static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { + + int r; + + assert(key); + + if (streq(key, "systemd.unit") && value) { + + if (!in_initrd()) + return free_and_strdup(&arg_default_unit, value); + + } else if (streq(key, "rd.systemd.unit") && value) { + + if (in_initrd()) + return free_and_strdup(&arg_default_unit, value); + + } else if (streq(key, "systemd.dump_core") && value) { + + r = parse_boolean(value); + if (r < 0) + log_warning("Failed to parse dump core switch %s. Ignoring.", value); + else + arg_dump_core = r; + + } else if (streq(key, "systemd.crash_chvt") && value) { + + if (parse_crash_chvt(value) < 0) + log_warning("Failed to parse crash chvt switch %s. Ignoring.", value); + + } else if (streq(key, "systemd.crash_shell") && value) { + + r = parse_boolean(value); + if (r < 0) + log_warning("Failed to parse crash shell switch %s. Ignoring.", value); + else + arg_crash_shell = r; + + } else if (streq(key, "systemd.crash_reboot") && value) { + + r = parse_boolean(value); + if (r < 0) + log_warning("Failed to parse crash reboot switch %s. Ignoring.", value); + else + arg_crash_reboot = r; + + } else if (streq(key, "systemd.confirm_spawn") && value) { + + r = parse_boolean(value); + if (r < 0) + log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value); + else + arg_confirm_spawn = r; + + } else if (streq(key, "systemd.show_status") && value) { + + r = parse_show_status(value, &arg_show_status); + if (r < 0) + log_warning("Failed to parse show status switch %s. Ignoring.", value); + + } else if (streq(key, "systemd.default_standard_output") && value) { + + r = exec_output_from_string(value); + if (r < 0) + log_warning("Failed to parse default standard output switch %s. Ignoring.", value); + else + arg_default_std_output = r; + + } else if (streq(key, "systemd.default_standard_error") && value) { + + r = exec_output_from_string(value); + if (r < 0) + log_warning("Failed to parse default standard error switch %s. Ignoring.", value); + else + arg_default_std_error = r; + + } else if (streq(key, "systemd.setenv") && value) { + + if (env_assignment_is_valid(value)) { + char **env; + + env = strv_env_set(arg_default_environment, value); + if (env) + arg_default_environment = env; + else + log_warning_errno(ENOMEM, "Setting environment variable '%s' failed, ignoring: %m", value); + } else + log_warning("Environment variable name '%s' is not valid. Ignoring.", value); + + } else if (streq(key, "systemd.machine_id") && value) { + + r = set_machine_id(value); + if (r < 0) + log_warning("MachineID '%s' is not valid. Ignoring.", value); + + } else if (streq(key, "quiet") && !value) { + + if (arg_show_status == _SHOW_STATUS_UNSET) + arg_show_status = SHOW_STATUS_AUTO; + + } else if (streq(key, "debug") && !value) { + + /* Note that log_parse_environment() handles 'debug' + * too, and sets the log level to LOG_DEBUG. */ + + if (detect_container() > 0) + log_set_target(LOG_TARGET_CONSOLE); + + } else if (!value) { + const char *target; + + /* SysV compatibility */ + target = runlevel_to_target(key); + if (target) + return free_and_strdup(&arg_default_unit, target); + + } else if (streq(key, "systemd.default_timeout_start_sec") && value) { + + r = parse_sec(value, &arg_default_timeout_start_usec); + if (r < 0) + log_warning_errno(r, "Failed to parse default start timeout: %s, ignoring.", value); + + if (arg_default_timeout_start_usec <= 0) + arg_default_timeout_start_usec = USEC_INFINITY; + } + + return 0; +} + +#define DEFINE_SETTER(name, func, descr) \ + static int name(const char *unit, \ + const char *filename, \ + unsigned line, \ + const char *section, \ + unsigned section_line, \ + const char *lvalue, \ + int ltype, \ + const char *rvalue, \ + void *data, \ + void *userdata) { \ + \ + int r; \ + \ + assert(filename); \ + assert(lvalue); \ + assert(rvalue); \ + \ + r = func(rvalue); \ + if (r < 0) \ + log_syntax(unit, LOG_ERR, filename, line, r, \ + "Invalid " descr "'%s': %m", \ + rvalue); \ + \ + return 0; \ + } + +DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level") +DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target") +DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" ) +DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location") + +static int config_parse_cpu_affinity2( + const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + _cleanup_cpu_free_ cpu_set_t *c = NULL; + int ncpus; + + ncpus = parse_cpu_set_and_warn(rvalue, &c, unit, filename, line, lvalue); + if (ncpus < 0) + return ncpus; + + if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0) + log_warning("Failed to set CPU affinity: %m"); + + return 0; +} + +static int config_parse_show_status( + const char* unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + int k; + ShowStatus *b = data; + + assert(filename); + assert(lvalue); + assert(rvalue); + assert(data); + + k = parse_show_status(rvalue, b); + if (k < 0) { + log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse show status setting, ignoring: %s", rvalue); + return 0; + } + + return 0; +} + +static int config_parse_crash_chvt( + const char* unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + int r; + + assert(filename); + assert(lvalue); + assert(rvalue); + + r = parse_crash_chvt(rvalue); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse CrashChangeVT= setting, ignoring: %s", rvalue); + return 0; + } + + return 0; +} + +static int config_parse_join_controllers(const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + const char *whole_rvalue = rvalue; + unsigned n = 0; + + assert(filename); + assert(lvalue); + assert(rvalue); + + arg_join_controllers = strv_free_free(arg_join_controllers); + + for (;;) { + _cleanup_free_ char *word = NULL; + char **l; + int r; + + r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue); + return r; + } + if (r == 0) + break; + + l = strv_split(word, ","); + if (!l) + return log_oom(); + strv_uniq(l); + + if (strv_length(l) <= 1) { + strv_free(l); + continue; + } + + if (!arg_join_controllers) { + arg_join_controllers = new(char**, 2); + if (!arg_join_controllers) { + strv_free(l); + return log_oom(); + } + + arg_join_controllers[0] = l; + arg_join_controllers[1] = NULL; + + n = 1; + } else { + char ***a; + char ***t; + + t = new0(char**, n+2); + if (!t) { + strv_free(l); + return log_oom(); + } + + n = 0; + + for (a = arg_join_controllers; *a; a++) { + + if (strv_overlap(*a, l)) { + if (strv_extend_strv(&l, *a, false) < 0) { + strv_free(l); + strv_free_free(t); + return log_oom(); + } + + } else { + char **c; + + c = strv_copy(*a); + if (!c) { + strv_free(l); + strv_free_free(t); + return log_oom(); + } + + t[n++] = c; + } + } + + t[n++] = strv_uniq(l); + + strv_free_free(arg_join_controllers); + arg_join_controllers = t; + } + } + if (!isempty(rvalue)) + log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring."); + + return 0; +} + +static int parse_config_file(void) { + + const ConfigTableItem items[] = { + { "Manager", "LogLevel", config_parse_level2, 0, NULL }, + { "Manager", "LogTarget", config_parse_target, 0, NULL }, + { "Manager", "LogColor", config_parse_color, 0, NULL }, + { "Manager", "LogLocation", config_parse_location, 0, NULL }, + { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core }, + { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt, 0, NULL }, + { "Manager", "CrashChangeVT", config_parse_crash_chvt, 0, NULL }, + { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell }, + { "Manager", "CrashReboot", config_parse_bool, 0, &arg_crash_reboot }, + { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status }, + { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL }, + { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers }, + { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog }, + { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog }, + { "Manager", "CapabilityBoundingSet", config_parse_capability_set, 0, &arg_capability_bounding_set }, +#ifdef HAVE_SECCOMP + { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs }, +#endif + { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec }, + { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec }, + { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output }, + { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error }, + { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec }, + { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec }, + { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec }, + { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval }, /* obsolete alias */ + { "Manager", "DefaultStartLimitIntervalSec",config_parse_sec, 0, &arg_default_start_limit_interval }, + { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst }, + { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment }, + { "Manager", "DefaultLimitCPU", config_parse_limit, RLIMIT_CPU, arg_default_rlimit }, + { "Manager", "DefaultLimitFSIZE", config_parse_limit, RLIMIT_FSIZE, arg_default_rlimit }, + { "Manager", "DefaultLimitDATA", config_parse_limit, RLIMIT_DATA, arg_default_rlimit }, + { "Manager", "DefaultLimitSTACK", config_parse_limit, RLIMIT_STACK, arg_default_rlimit }, + { "Manager", "DefaultLimitCORE", config_parse_limit, RLIMIT_CORE, arg_default_rlimit }, + { "Manager", "DefaultLimitRSS", config_parse_limit, RLIMIT_RSS, arg_default_rlimit }, + { "Manager", "DefaultLimitNOFILE", config_parse_limit, RLIMIT_NOFILE, arg_default_rlimit }, + { "Manager", "DefaultLimitAS", config_parse_limit, RLIMIT_AS, arg_default_rlimit }, + { "Manager", "DefaultLimitNPROC", config_parse_limit, RLIMIT_NPROC, arg_default_rlimit }, + { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, RLIMIT_MEMLOCK, arg_default_rlimit }, + { "Manager", "DefaultLimitLOCKS", config_parse_limit, RLIMIT_LOCKS, arg_default_rlimit }, + { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, RLIMIT_SIGPENDING, arg_default_rlimit }, + { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, RLIMIT_MSGQUEUE, arg_default_rlimit }, + { "Manager", "DefaultLimitNICE", config_parse_limit, RLIMIT_NICE, arg_default_rlimit }, + { "Manager", "DefaultLimitRTPRIO", config_parse_limit, RLIMIT_RTPRIO, arg_default_rlimit }, + { "Manager", "DefaultLimitRTTIME", config_parse_limit, RLIMIT_RTTIME, arg_default_rlimit }, + { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting }, + { "Manager", "DefaultIOAccounting", config_parse_bool, 0, &arg_default_io_accounting }, + { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting }, + { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting }, + { "Manager", "DefaultTasksAccounting", config_parse_bool, 0, &arg_default_tasks_accounting }, + { "Manager", "DefaultTasksMax", config_parse_tasks_max, 0, &arg_default_tasks_max }, + { "Manager", "CtrlAltDelBurstAction", config_parse_emergency_action, 0, &arg_cad_burst_action }, + {} + }; + + const char *fn, *conf_dirs_nulstr; + + fn = arg_system ? + PKGSYSCONFDIR "/system.conf" : + PKGSYSCONFDIR "/user.conf"; + + conf_dirs_nulstr = arg_system ? + CONF_PATHS_NULSTR("systemd/system.conf.d") : + CONF_PATHS_NULSTR("systemd/user.conf.d"); + + config_parse_many_nulstr(fn, conf_dirs_nulstr, "Manager\0", config_item_table_lookup, items, false, NULL); + + /* Traditionally "0" was used to turn off the default unit timeouts. Fix this up so that we used USEC_INFINITY + * like everywhere else. */ + if (arg_default_timeout_start_usec <= 0) + arg_default_timeout_start_usec = USEC_INFINITY; + if (arg_default_timeout_stop_usec <= 0) + arg_default_timeout_stop_usec = USEC_INFINITY; + + return 0; +} + +static void manager_set_defaults(Manager *m) { + + assert(m); + + m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec; + m->default_std_output = arg_default_std_output; + m->default_std_error = arg_default_std_error; + m->default_timeout_start_usec = arg_default_timeout_start_usec; + m->default_timeout_stop_usec = arg_default_timeout_stop_usec; + m->default_restart_usec = arg_default_restart_usec; + m->default_start_limit_interval = arg_default_start_limit_interval; + m->default_start_limit_burst = arg_default_start_limit_burst; + m->default_cpu_accounting = arg_default_cpu_accounting; + m->default_io_accounting = arg_default_io_accounting; + m->default_blockio_accounting = arg_default_blockio_accounting; + m->default_memory_accounting = arg_default_memory_accounting; + m->default_tasks_accounting = arg_default_tasks_accounting; + m->default_tasks_max = arg_default_tasks_max; + + manager_set_default_rlimits(m, arg_default_rlimit); + manager_environment_add(m, NULL, arg_default_environment); +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_LOG_LEVEL = 0x100, + ARG_LOG_TARGET, + ARG_LOG_COLOR, + ARG_LOG_LOCATION, + ARG_UNIT, + ARG_SYSTEM, + ARG_USER, + ARG_TEST, + ARG_NO_PAGER, + ARG_VERSION, + ARG_DUMP_CONFIGURATION_ITEMS, + ARG_DUMP_CORE, + ARG_CRASH_CHVT, + ARG_CRASH_SHELL, + ARG_CRASH_REBOOT, + ARG_CONFIRM_SPAWN, + ARG_SHOW_STATUS, + ARG_DESERIALIZE, + ARG_SWITCHED_ROOT, + ARG_DEFAULT_STD_OUTPUT, + ARG_DEFAULT_STD_ERROR, + ARG_MACHINE_ID + }; + + 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 }, + { "unit", required_argument, NULL, ARG_UNIT }, + { "system", no_argument, NULL, ARG_SYSTEM }, + { "user", no_argument, NULL, ARG_USER }, + { "test", no_argument, NULL, ARG_TEST }, + { "no-pager", no_argument, NULL, ARG_NO_PAGER }, + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, + { "dump-core", optional_argument, NULL, ARG_DUMP_CORE }, + { "crash-chvt", required_argument, NULL, ARG_CRASH_CHVT }, + { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL }, + { "crash-reboot", optional_argument, NULL, ARG_CRASH_REBOOT }, + { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN }, + { "show-status", optional_argument, NULL, ARG_SHOW_STATUS }, + { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, + { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT }, + { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, }, + { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, }, + { "machine-id", required_argument, NULL, ARG_MACHINE_ID }, + {} + }; + + int c, r; + + assert(argc >= 1); + assert(argv); + + if (getpid() == 1) + opterr = 0; + + while ((c = getopt_long(argc, argv, "hDbsz:", 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.", optarg); + return r; + } + + break; + + case ARG_LOG_TARGET: + r = log_set_target_from_string(optarg); + if (r < 0) { + log_error("Failed to parse log target %s.", optarg); + return r; + } + + 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.", optarg); + return r; + } + } 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.", optarg); + return r; + } + } else + log_show_location(true); + + break; + + case ARG_DEFAULT_STD_OUTPUT: + r = exec_output_from_string(optarg); + if (r < 0) { + log_error("Failed to parse default standard output setting %s.", optarg); + return r; + } else + arg_default_std_output = r; + break; + + case ARG_DEFAULT_STD_ERROR: + r = exec_output_from_string(optarg); + if (r < 0) { + log_error("Failed to parse default standard error output setting %s.", optarg); + return r; + } else + arg_default_std_error = r; + break; + + case ARG_UNIT: + + r = free_and_strdup(&arg_default_unit, optarg); + if (r < 0) + return log_error_errno(r, "Failed to set default unit %s: %m", optarg); + + break; + + case ARG_SYSTEM: + arg_system = true; + break; + + case ARG_USER: + arg_system = false; + break; + + case ARG_TEST: + arg_action = ACTION_TEST; + break; + + case ARG_NO_PAGER: + arg_no_pager = true; + break; + + case ARG_VERSION: + arg_action = ACTION_VERSION; + break; + + case ARG_DUMP_CONFIGURATION_ITEMS: + arg_action = ACTION_DUMP_CONFIGURATION_ITEMS; + break; + + case ARG_DUMP_CORE: + if (!optarg) + arg_dump_core = true; + else { + r = parse_boolean(optarg); + if (r < 0) + return log_error_errno(r, "Failed to parse dump core boolean: %s", optarg); + arg_dump_core = r; + } + break; + + case ARG_CRASH_CHVT: + r = parse_crash_chvt(optarg); + if (r < 0) + return log_error_errno(r, "Failed to parse crash virtual terminal index: %s", optarg); + break; + + case ARG_CRASH_SHELL: + if (!optarg) + arg_crash_shell = true; + else { + r = parse_boolean(optarg); + if (r < 0) + return log_error_errno(r, "Failed to parse crash shell boolean: %s", optarg); + arg_crash_shell = r; + } + break; + + case ARG_CRASH_REBOOT: + if (!optarg) + arg_crash_reboot = true; + else { + r = parse_boolean(optarg); + if (r < 0) + return log_error_errno(r, "Failed to parse crash shell boolean: %s", optarg); + arg_crash_reboot = r; + } + break; + + case ARG_CONFIRM_SPAWN: + r = optarg ? parse_boolean(optarg) : 1; + if (r < 0) { + log_error("Failed to parse confirm spawn boolean %s.", optarg); + return r; + } + arg_confirm_spawn = r; + break; + + case ARG_SHOW_STATUS: + if (optarg) { + r = parse_show_status(optarg, &arg_show_status); + if (r < 0) { + log_error("Failed to parse show status boolean %s.", optarg); + return r; + } + } else + arg_show_status = SHOW_STATUS_YES; + break; + + case ARG_DESERIALIZE: { + int fd; + FILE *f; + + r = safe_atoi(optarg, &fd); + if (r < 0 || fd < 0) { + log_error("Failed to parse deserialize option %s.", optarg); + return -EINVAL; + } + + (void) fd_cloexec(fd, true); + + f = fdopen(fd, "r"); + if (!f) + return log_error_errno(errno, "Failed to open serialization fd: %m"); + + safe_fclose(arg_serialization); + arg_serialization = f; + + break; + } + + case ARG_SWITCHED_ROOT: + arg_switched_root = true; + break; + + case ARG_MACHINE_ID: + r = set_machine_id(optarg); + if (r < 0) + return log_error_errno(r, "MachineID '%s' is not valid.", optarg); + break; + + case 'h': + arg_action = ACTION_HELP; + break; + + case 'D': + log_set_max_level(LOG_DEBUG); + break; + + case 'b': + case 's': + case 'z': + /* Just to eat away the sysvinit kernel + * cmdline args without getopt() error + * messages that we'll parse in + * parse_proc_cmdline_word() or ignore. */ + + case '?': + if (getpid() != 1) + return -EINVAL; + else + return 0; + + default: + assert_not_reached("Unhandled option code."); + } + + if (optind < argc && getpid() != 1) { + /* Hmm, when we aren't run as init system + * let's complain about excess arguments */ + + log_error("Excess arguments."); + return -EINVAL; + } + + return 0; +} + +static int help(void) { + + printf("%s [OPTIONS...]\n\n" + "Starts up and maintains the system or user services.\n\n" + " -h --help Show this help\n" + " --test Determine startup sequence, dump it and exit\n" + " --no-pager Do not pipe output into a pager\n" + " --dump-configuration-items Dump understood unit configuration items\n" + " --unit=UNIT Set default unit\n" + " --system Run a system instance, even if PID != 1\n" + " --user Run a user instance\n" + " --dump-core[=BOOL] Dump core on crash\n" + " --crash-vt=NR Change to specified VT on crash\n" + " --crash-reboot[=BOOL] Reboot on crash\n" + " --crash-shell[=BOOL] Run shell on crash\n" + " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n" + " --show-status[=BOOL] Show status updates on the console during bootup\n" + " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n" + " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n" + " --log-color[=BOOL] Highlight important log messages\n" + " --log-location[=BOOL] Include code location in log messages\n" + " --default-standard-output= Set default standard output for services\n" + " --default-standard-error= Set default standard error output for services\n", + program_invocation_short_name); + + return 0; +} + +static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) { + _cleanup_fdset_free_ FDSet *fds = NULL; + _cleanup_fclose_ FILE *f = NULL; + int r; + + assert(m); + assert(_f); + assert(_fds); + + r = manager_open_serialization(m, &f); + if (r < 0) + return log_error_errno(r, "Failed to create serialization file: %m"); + + /* Make sure nothing is really destructed when we shut down */ + m->n_reloading++; + bus_manager_send_reloading(m, true); + + fds = fdset_new(); + if (!fds) + return log_oom(); + + r = manager_serialize(m, f, fds, switching_root); + if (r < 0) + return log_error_errno(r, "Failed to serialize state: %m"); + + if (fseeko(f, 0, SEEK_SET) == (off_t) -1) + return log_error_errno(errno, "Failed to rewind serialization fd: %m"); + + r = fd_cloexec(fileno(f), false); + if (r < 0) + return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m"); + + r = fdset_cloexec(fds, false); + if (r < 0) + return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m"); + + *_f = f; + *_fds = fds; + + f = NULL; + fds = NULL; + + return 0; +} + +static int bump_rlimit_nofile(struct rlimit *saved_rlimit) { + struct rlimit nl; + int r; + + assert(saved_rlimit); + + /* Save the original RLIMIT_NOFILE so that we can reset it + * later when transitioning from the initrd to the main + * systemd or suchlike. */ + if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) + return log_warning_errno(errno, "Reading RLIMIT_NOFILE failed, ignoring: %m"); + + /* Make sure forked processes get the default kernel setting */ + if (!arg_default_rlimit[RLIMIT_NOFILE]) { + struct rlimit *rl; + + rl = newdup(struct rlimit, saved_rlimit, 1); + if (!rl) + return log_oom(); + + arg_default_rlimit[RLIMIT_NOFILE] = rl; + } + + /* Bump up the resource limit for ourselves substantially */ + nl.rlim_cur = nl.rlim_max = 64*1024; + r = setrlimit_closest(RLIMIT_NOFILE, &nl); + if (r < 0) + return log_warning_errno(r, "Setting RLIMIT_NOFILE failed, ignoring: %m"); + + return 0; +} + +static void test_usr(void) { + + /* Check that /usr is not a separate fs */ + + if (dir_is_empty("/usr") <= 0) + return; + + log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. " + "Some things will probably break (sometimes even silently) in mysterious ways. " + "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information."); +} + +static int initialize_join_controllers(void) { + /* By default, mount "cpu" + "cpuacct" together, and "net_cls" + * + "net_prio". We'd like to add "cpuset" to the mix, but + * "cpuset" doesn't really work for groups with no initialized + * attributes. */ + + arg_join_controllers = new(char**, 3); + if (!arg_join_controllers) + return -ENOMEM; + + arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL); + if (!arg_join_controllers[0]) + goto oom; + + arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL); + if (!arg_join_controllers[1]) + goto oom; + + arg_join_controllers[2] = NULL; + return 0; + +oom: + arg_join_controllers = strv_free_free(arg_join_controllers); + return -ENOMEM; +} + +static int enforce_syscall_archs(Set *archs) { +#ifdef HAVE_SECCOMP + scmp_filter_ctx *seccomp; + Iterator i; + void *id; + int r; + + if (!is_seccomp_available()) + return 0; + + seccomp = seccomp_init(SCMP_ACT_ALLOW); + if (!seccomp) + return log_oom(); + + SET_FOREACH(id, arg_syscall_archs, i) { + r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); + if (r == -EEXIST) + continue; + if (r < 0) { + log_error_errno(r, "Failed to add architecture to seccomp: %m"); + goto finish; + } + } + + r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); + if (r < 0) { + log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m"); + goto finish; + } + + r = seccomp_load(seccomp); + if (r < 0) + log_error_errno(r, "Failed to add install architecture seccomp: %m"); + +finish: + seccomp_release(seccomp); + return r; +#else + return 0; +#endif +} + +static int status_welcome(void) { + _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; + int r; + + r = parse_env_file("/etc/os-release", NEWLINE, + "PRETTY_NAME", &pretty_name, + "ANSI_COLOR", &ansi_color, + NULL); + if (r == -ENOENT) + r = parse_env_file("/usr/lib/os-release", NEWLINE, + "PRETTY_NAME", &pretty_name, + "ANSI_COLOR", &ansi_color, + NULL); + + if (r < 0 && r != -ENOENT) + log_warning_errno(r, "Failed to read os-release file: %m"); + + if (log_get_show_color()) + return status_printf(NULL, false, false, + "\nWelcome to \x1B[%sm%s\x1B[0m!\n", + isempty(ansi_color) ? "1" : ansi_color, + isempty(pretty_name) ? "GNU/Linux" : pretty_name); + else + return status_printf(NULL, false, false, + "\nWelcome to %s!\n", + isempty(pretty_name) ? "GNU/Linux" : pretty_name); +} + +static int write_container_id(void) { + const char *c; + int r; + + c = getenv("container"); + if (isempty(c)) + return 0; + + RUN_WITH_UMASK(0022) + r = write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE); + if (r < 0) + return log_warning_errno(r, "Failed to write /run/systemd/container, ignoring: %m"); + + return 1; +} + +static int bump_unix_max_dgram_qlen(void) { + _cleanup_free_ char *qlen = NULL; + unsigned long v; + int r; + + /* Let's bump the net.unix.max_dgram_qlen sysctl. The kernel + * default of 16 is simply too low. We set the value really + * really early during boot, so that it is actually applied to + * all our sockets, including the $NOTIFY_SOCKET one. */ + + r = read_one_line_file("/proc/sys/net/unix/max_dgram_qlen", &qlen); + if (r < 0) + return log_warning_errno(r, "Failed to read AF_UNIX datagram queue length, ignoring: %m"); + + r = safe_atolu(qlen, &v); + if (r < 0) + return log_warning_errno(r, "Failed to parse AF_UNIX datagram queue length, ignoring: %m"); + + if (v >= DEFAULT_UNIX_MAX_DGRAM_QLEN) + return 0; + + qlen = mfree(qlen); + if (asprintf(&qlen, "%lu\n", DEFAULT_UNIX_MAX_DGRAM_QLEN) < 0) + return log_oom(); + + r = write_string_file("/proc/sys/net/unix/max_dgram_qlen", qlen, 0); + if (r < 0) + return log_full_errno(IN_SET(r, -EROFS, -EPERM, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, + "Failed to bump AF_UNIX datagram queue length, ignoring: %m"); + + return 1; +} + +static int fixup_environment(void) { + _cleanup_free_ char *term = NULL; + int r; + + /* We expect the environment to be set correctly + * if run inside a container. */ + if (detect_container() > 0) + return 0; + + /* When started as PID1, the kernel uses /dev/console + * for our stdios and uses TERM=linux whatever the + * backend device used by the console. We try to make + * a better guess here since some consoles might not + * have support for color mode for example. + * + * However if TERM was configured through the kernel + * command line then leave it alone. */ + + r = get_proc_cmdline_key("TERM=", &term); + if (r < 0) + return r; + + if (r == 0) { + term = strdup(default_term_for_tty("/dev/console")); + if (!term) + return -ENOMEM; + } + + if (setenv("TERM", term, 1) < 0) + return -errno; + + return 0; +} + +int main(int argc, char *argv[]) { + Manager *m = NULL; + int r, retval = EXIT_FAILURE; + usec_t before_startup, after_startup; + char timespan[FORMAT_TIMESPAN_MAX]; + FDSet *fds = NULL; + bool reexecute = false; + const char *shutdown_verb = NULL; + dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL; + dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL; + dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL; + dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL; + dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL; + static char systemd[] = "systemd"; + bool skip_setup = false; + unsigned j; + bool loaded_policy = false; + bool arm_reboot_watchdog = false; + bool queue_default_job = false; + bool empty_etc = false; + char *switch_root_dir = NULL, *switch_root_init = NULL; + struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0); + const char *error_message = NULL; + +#ifdef HAVE_SYSV_COMPAT + if (getpid() != 1 && strstr(program_invocation_short_name, "init")) { + /* This is compatibility support for SysV, where + * calling init as a user is identical to telinit. */ + + execv(SYSTEMCTL_BINARY_PATH, argv); + log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m"); + return 1; + } +#endif + + dual_timestamp_from_monotonic(&kernel_timestamp, 0); + dual_timestamp_get(&userspace_timestamp); + + /* Determine if this is a reexecution or normal bootup. We do + * the full command line parsing much later, so let's just + * have a quick peek here. */ + if (strv_find(argv+1, "--deserialize")) + skip_setup = true; + + /* If we have switched root, do all the special setup + * things */ + if (strv_find(argv+1, "--switched-root")) + skip_setup = false; + + /* If we get started via the /sbin/init symlink then we are + called 'init'. After a subsequent reexecution we are then + called 'systemd'. That is confusing, hence let's call us + systemd right-away. */ + program_invocation_short_name = systemd; + prctl(PR_SET_NAME, systemd); + + saved_argv = argv; + saved_argc = argc; + + log_set_upgrade_syslog_to_journal(true); + + /* Disable the umask logic */ + if (getpid() == 1) + umask(0); + + if (getpid() == 1 && detect_container() <= 0) { + + /* Running outside of a container as PID 1 */ + arg_system = true; + log_set_target(LOG_TARGET_KMSG); + log_open(); + + if (in_initrd()) + initrd_timestamp = userspace_timestamp; + + if (!skip_setup) { + r = mount_setup_early(); + if (r < 0) { + error_message = "Failed to early mount API filesystems"; + goto finish; + } + dual_timestamp_get(&security_start_timestamp); + if (mac_selinux_setup(&loaded_policy) < 0) { + error_message = "Failed to load SELinux policy"; + goto finish; + } else if (mac_smack_setup(&loaded_policy) < 0) { + error_message = "Failed to load SMACK policy"; + goto finish; + } else if (ima_setup() < 0) { + error_message = "Failed to load IMA policy"; + goto finish; + } + dual_timestamp_get(&security_finish_timestamp); + } + + if (mac_selinux_init() < 0) { + error_message = "Failed to initialize SELinux policy"; + goto finish; + } + + if (!skip_setup) { + if (clock_is_localtime(NULL) > 0) { + int min; + + /* + * The very first call of settimeofday() also does a time warp in the kernel. + * + * In the rtc-in-local time mode, we set the kernel's timezone, and rely on + * external tools to take care of maintaining the RTC and do all adjustments. + * This matches the behavior of Windows, which leaves the RTC alone if the + * registry tells that the RTC runs in UTC. + */ + r = clock_set_timezone(&min); + if (r < 0) + log_error_errno(r, "Failed to apply local time delta, ignoring: %m"); + else + log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min); + } else if (!in_initrd()) { + /* + * Do a dummy very first call to seal the kernel's time warp magic. + * + * Do not call this from inside the initrd. The initrd might not + * carry /etc/adjtime with LOCAL, but the real system could be set up + * that way. In such case, we need to delay the time-warp or the sealing + * until we reach the real system. + * + * Do no set the kernel's timezone. The concept of local time cannot + * be supported reliably, the time will jump or be incorrect at every daylight + * saving time change. All kernel local time concepts will be treated + * as UTC that way. + */ + (void) clock_reset_timewarp(); + } + + r = clock_apply_epoch(); + if (r < 0) + log_error_errno(r, "Current system time is before build time, but cannot correct: %m"); + else if (r > 0) + log_info("System time before build time, advancing clock."); + } + + /* Set the default for later on, but don't actually + * open the logs like this for now. Note that if we + * are transitioning from the initrd there might still + * be journal fd open, and we shouldn't attempt + * opening that before we parsed /proc/cmdline which + * might redirect output elsewhere. */ + log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); + + } else if (getpid() == 1) { + /* Running inside a container, as PID 1 */ + arg_system = true; + log_set_target(LOG_TARGET_CONSOLE); + log_close_console(); /* force reopen of /dev/console */ + log_open(); + + /* For the later on, see above... */ + log_set_target(LOG_TARGET_JOURNAL); + + /* clear the kernel timestamp, + * because we are in a container */ + kernel_timestamp = DUAL_TIMESTAMP_NULL; + } else { + /* Running as user instance */ + arg_system = false; + log_set_target(LOG_TARGET_AUTO); + log_open(); + + /* clear the kernel timestamp, + * because we are not PID 1 */ + kernel_timestamp = DUAL_TIMESTAMP_NULL; + } + + if (getpid() == 1) { + /* Don't limit the core dump size, so that coredump handlers such as systemd-coredump (which honour the limit) + * will process core dumps for system services by default. */ + if (setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY)) < 0) + log_warning_errno(errno, "Failed to set RLIMIT_CORE: %m"); + + /* But at the same time, turn off the core_pattern logic by default, so that no coredumps are stored + * until the systemd-coredump tool is enabled via sysctl. */ + if (!skip_setup) + (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0); + } + + if (arg_system) { + if (fixup_environment() < 0) { + error_message = "Failed to fix up PID1 environment"; + goto finish; + } + + /* Try to figure out if we can use colors with the console. No + * need to do that for user instances since they never log + * into the console. */ + log_show_color(colors_enabled()); + r = make_null_stdio(); + if (r < 0) + log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); + } + + r = initialize_join_controllers(); + if (r < 0) { + error_message = "Failed to initialize cgroup controllers"; + goto finish; + } + + /* Mount /proc, /sys and friends, so that /proc/cmdline and + * /proc/$PID/fd is available. */ + if (getpid() == 1) { + + /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */ + if (!skip_setup) + kmod_setup(); + + r = mount_setup(loaded_policy); + if (r < 0) { + error_message = "Failed to mount API filesystems"; + goto finish; + } + } + + /* Reset all signal handlers. */ + (void) reset_all_signal_handlers(); + (void) ignore_signals(SIGNALS_IGNORE, -1); + + arg_default_tasks_max = system_tasks_max_scale(DEFAULT_TASKS_MAX_PERCENTAGE, 100U); + + if (parse_config_file() < 0) { + error_message = "Failed to parse config file"; + goto finish; + } + + if (arg_system) { + r = parse_proc_cmdline(parse_proc_cmdline_item, NULL, false); + if (r < 0) + log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); + } + + /* Note that this also parses bits from the kernel command + * line, including "debug". */ + log_parse_environment(); + + if (parse_argv(argc, argv) < 0) { + error_message = "Failed to parse commandline arguments"; + goto finish; + } + + /* Initialize default unit */ + if (!arg_default_unit) { + arg_default_unit = strdup(SPECIAL_DEFAULT_TARGET); + if (!arg_default_unit) { + r = log_oom(); + error_message = "Failed to set default unit"; + goto finish; + } + } + + if (arg_action == ACTION_TEST && + geteuid() == 0) { + log_error("Don't run test mode as root."); + goto finish; + } + + if (!arg_system && + arg_action == ACTION_RUN && + sd_booted() <= 0) { + log_error("Trying to run as user instance, but the system has not been booted with systemd."); + goto finish; + } + + if (arg_system && + arg_action == ACTION_RUN && + running_in_chroot() > 0) { + log_error("Cannot be run in a chroot() environment."); + goto finish; + } + + if (arg_action == ACTION_TEST || arg_action == ACTION_HELP) { + pager_open(arg_no_pager, false); + skip_setup = true; + } + + if (arg_action == ACTION_HELP) { + retval = help(); + goto finish; + } else if (arg_action == ACTION_VERSION) { + retval = version(); + goto finish; + } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) { + pager_open(arg_no_pager, false); + unit_dump_config_items(stdout); + retval = EXIT_SUCCESS; + goto finish; + } + + if (!arg_system && + !getenv("XDG_RUNTIME_DIR")) { + log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set."); + goto finish; + } + + assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST); + + /* Close logging fds, in order not to confuse fdset below */ + log_close(); + + /* Remember open file descriptors for later deserialization */ + r = fdset_new_fill(&fds); + if (r < 0) { + log_emergency_errno(r, "Failed to allocate fd set: %m"); + error_message = "Failed to allocate fd set"; + goto finish; + } else + fdset_cloexec(fds, true); + + if (arg_serialization) + assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0); + + if (arg_system) + /* Become a session leader if we aren't one yet. */ + setsid(); + + /* Move out of the way, so that we won't block unmounts */ + assert_se(chdir("/") == 0); + + /* Reset the console, but only if this is really init and we + * are freshly booted */ + if (arg_system && arg_action == ACTION_RUN) { + + /* If we are init, we connect stdin/stdout/stderr to + * /dev/null and make sure we don't have a controlling + * tty. */ + release_terminal(); + + if (getpid() == 1 && !skip_setup) + console_setup(); + } + + /* Open the logging devices, if possible and necessary */ + log_open(); + + if (arg_show_status == _SHOW_STATUS_UNSET) + arg_show_status = SHOW_STATUS_YES; + + /* Make sure we leave a core dump without panicing the + * kernel. */ + if (getpid() == 1) { + install_crash_handler(); + + r = mount_cgroup_controllers(arg_join_controllers); + if (r < 0) + goto finish; + } + + if (arg_system) { + int v; + + log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")", + arg_action == ACTION_TEST ? "test " : "" ); + + v = detect_virtualization(); + if (v > 0) + log_info("Detected virtualization %s.", virtualization_to_string(v)); + + write_container_id(); + + log_info("Detected architecture %s.", architecture_to_string(uname_architecture())); + + if (in_initrd()) + log_info("Running in initial RAM disk."); + + /* Let's check whether /etc is already populated. We + * don't actually really check for that, but use + * /etc/machine-id as flag file. This allows container + * managers and installers to provision a couple of + * files already. If the container manager wants to + * provision the machine ID itself it should pass + * $container_uuid to PID 1. */ + + empty_etc = access("/etc/machine-id", F_OK) < 0; + if (empty_etc) + log_info("Running with unpopulated /etc."); + } else { + _cleanup_free_ char *t; + + t = uid_to_name(getuid()); + log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")", + arg_action == ACTION_TEST ? " test" : "", getuid(), t); + } + + if (arg_system && !skip_setup) { + if (arg_show_status > 0) + status_welcome(); + + hostname_setup(); + machine_id_setup(NULL, arg_machine_id, NULL); + loopback_setup(); + bump_unix_max_dgram_qlen(); + + test_usr(); + } + + if (arg_system && arg_runtime_watchdog > 0 && arg_runtime_watchdog != USEC_INFINITY) + watchdog_set_timeout(&arg_runtime_watchdog); + + if (arg_timer_slack_nsec != NSEC_INFINITY) + if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0) + log_error_errno(errno, "Failed to adjust timer slack: %m"); + + if (!cap_test_all(arg_capability_bounding_set)) { + r = capability_bounding_set_drop_usermode(arg_capability_bounding_set); + if (r < 0) { + log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m"); + error_message = "Failed to drop capability bounding set of usermode helpers"; + goto finish; + } + r = capability_bounding_set_drop(arg_capability_bounding_set, true); + if (r < 0) { + log_emergency_errno(r, "Failed to drop capability bounding set: %m"); + error_message = "Failed to drop capability bounding set"; + goto finish; + } + } + + if (arg_syscall_archs) { + r = enforce_syscall_archs(arg_syscall_archs); + if (r < 0) { + error_message = "Failed to set syscall architectures"; + goto finish; + } + } + + if (!arg_system) + /* Become reaper of our children */ + if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) + log_warning_errno(errno, "Failed to make us a subreaper: %m"); + + if (arg_system) { + (void) bump_rlimit_nofile(&saved_rlimit_nofile); + + if (empty_etc) { + r = unit_file_preset_all(UNIT_FILE_SYSTEM, 0, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, NULL, 0); + if (r < 0) + log_full_errno(r == -EEXIST ? LOG_NOTICE : LOG_WARNING, r, "Failed to populate /etc with preset unit settings, ignoring: %m"); + else + log_info("Populated /etc with preset unit settings."); + } + } + + r = manager_new(arg_system ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, arg_action == ACTION_TEST, &m); + if (r < 0) { + log_emergency_errno(r, "Failed to allocate manager object: %m"); + error_message = "Failed to allocate manager object"; + goto finish; + } + + m->confirm_spawn = arg_confirm_spawn; + m->runtime_watchdog = arg_runtime_watchdog; + m->shutdown_watchdog = arg_shutdown_watchdog; + m->userspace_timestamp = userspace_timestamp; + m->kernel_timestamp = kernel_timestamp; + m->initrd_timestamp = initrd_timestamp; + m->security_start_timestamp = security_start_timestamp; + m->security_finish_timestamp = security_finish_timestamp; + m->cad_burst_action = arg_cad_burst_action; + + manager_set_defaults(m); + manager_set_show_status(m, arg_show_status); + manager_set_first_boot(m, empty_etc); + + /* Remember whether we should queue the default job */ + queue_default_job = !arg_serialization || arg_switched_root; + + before_startup = now(CLOCK_MONOTONIC); + + r = manager_startup(m, arg_serialization, fds); + if (r < 0) + log_error_errno(r, "Failed to fully start up daemon: %m"); + + /* This will close all file descriptors that were opened, but + * not claimed by any unit. */ + fds = fdset_free(fds); + + arg_serialization = safe_fclose(arg_serialization); + + if (queue_default_job) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + Unit *target = NULL; + Job *default_unit_job; + + log_debug("Activating default unit: %s", arg_default_unit); + + r = manager_load_unit(m, arg_default_unit, NULL, &error, &target); + if (r < 0) + log_error("Failed to load default target: %s", bus_error_message(&error, r)); + else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) + log_error_errno(target->load_error, "Failed to load default target: %m"); + else if (target->load_state == UNIT_MASKED) + log_error("Default target masked."); + + if (!target || target->load_state != UNIT_LOADED) { + log_info("Trying to load rescue target..."); + + r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target); + if (r < 0) { + log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r)); + error_message = "Failed to load rescue target"; + goto finish; + } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) { + log_emergency_errno(target->load_error, "Failed to load rescue target: %m"); + error_message = "Failed to load rescue target"; + goto finish; + } else if (target->load_state == UNIT_MASKED) { + log_emergency("Rescue target masked."); + error_message = "Rescue target masked"; + goto finish; + } + } + + assert(target->load_state == UNIT_LOADED); + + if (arg_action == ACTION_TEST) { + printf("-> By units:\n"); + manager_dump_units(m, stdout, "\t"); + } + + r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, &error, &default_unit_job); + if (r == -EPERM) { + log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r)); + + sd_bus_error_free(&error); + + r = manager_add_job(m, JOB_START, target, JOB_REPLACE, &error, &default_unit_job); + if (r < 0) { + log_emergency("Failed to start default target: %s", bus_error_message(&error, r)); + error_message = "Failed to start default target"; + goto finish; + } + } else if (r < 0) { + log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r)); + error_message = "Failed to isolate default target"; + goto finish; + } + + m->default_unit_job_id = default_unit_job->id; + + after_startup = now(CLOCK_MONOTONIC); + log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG, + "Loaded units and determined initial transaction in %s.", + format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC)); + + if (arg_action == ACTION_TEST) { + printf("-> By jobs:\n"); + manager_dump_jobs(m, stdout, "\t"); + retval = EXIT_SUCCESS; + goto finish; + } + } + + for (;;) { + r = manager_loop(m); + if (r < 0) { + log_emergency_errno(r, "Failed to run main loop: %m"); + error_message = "Failed to run main loop"; + goto finish; + } + + switch (m->exit_code) { + + case MANAGER_RELOAD: + log_info("Reloading."); + + r = parse_config_file(); + if (r < 0) + log_error("Failed to parse config file."); + + manager_set_defaults(m); + + r = manager_reload(m); + if (r < 0) + log_error_errno(r, "Failed to reload: %m"); + break; + + case MANAGER_REEXECUTE: + + if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) { + error_message = "Failed to prepare for reexecution"; + goto finish; + } + + reexecute = true; + log_notice("Reexecuting."); + goto finish; + + case MANAGER_SWITCH_ROOT: + /* Steal the switch root parameters */ + switch_root_dir = m->switch_root; + switch_root_init = m->switch_root_init; + m->switch_root = m->switch_root_init = NULL; + + if (!switch_root_init) + if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) { + error_message = "Failed to prepare for reexecution"; + goto finish; + } + + reexecute = true; + log_notice("Switching root."); + goto finish; + + case MANAGER_EXIT: + retval = m->return_value; + + if (MANAGER_IS_USER(m)) { + log_debug("Exit."); + goto finish; + } + + /* fallthrough */ + case MANAGER_REBOOT: + case MANAGER_POWEROFF: + case MANAGER_HALT: + case MANAGER_KEXEC: { + static const char * const table[_MANAGER_EXIT_CODE_MAX] = { + [MANAGER_EXIT] = "exit", + [MANAGER_REBOOT] = "reboot", + [MANAGER_POWEROFF] = "poweroff", + [MANAGER_HALT] = "halt", + [MANAGER_KEXEC] = "kexec" + }; + + assert_se(shutdown_verb = table[m->exit_code]); + arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT; + + log_notice("Shutting down."); + goto finish; + } + + default: + assert_not_reached("Unknown exit code."); + } + } + +finish: + pager_close(); + + if (m) + arg_shutdown_watchdog = m->shutdown_watchdog; + + m = manager_free(m); + + for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) + arg_default_rlimit[j] = mfree(arg_default_rlimit[j]); + + arg_default_unit = mfree(arg_default_unit); + arg_join_controllers = strv_free_free(arg_join_controllers); + arg_default_environment = strv_free(arg_default_environment); + arg_syscall_archs = set_free(arg_syscall_archs); + + mac_selinux_finish(); + + if (reexecute) { + const char **args; + unsigned i, args_size; + + /* Close and disarm the watchdog, so that the new + * instance can reinitialize it, but doesn't get + * rebooted while we do that */ + watchdog_close(true); + + /* Reset the RLIMIT_NOFILE to the kernel default, so + * that the new systemd can pass the kernel default to + * its child processes */ + if (saved_rlimit_nofile.rlim_cur > 0) + (void) setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile); + + if (switch_root_dir) { + /* Kill all remaining processes from the + * initrd, but don't wait for them, so that we + * can handle the SIGCHLD for them after + * deserializing. */ + broadcast_signal(SIGTERM, false, true); + + /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */ + r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE); + if (r < 0) + log_error_errno(r, "Failed to switch root, trying to continue: %m"); + } + + args_size = MAX(6, argc+1); + args = newa(const char*, args_size); + + if (!switch_root_init) { + char sfd[DECIMAL_STR_MAX(int) + 1]; + + /* First try to spawn ourselves with the right + * path, and with full serialization. We do + * this only if the user didn't specify an + * explicit init to spawn. */ + + assert(arg_serialization); + assert(fds); + + xsprintf(sfd, "%i", fileno(arg_serialization)); + + i = 0; + args[i++] = SYSTEMD_BINARY_PATH; + if (switch_root_dir) + args[i++] = "--switched-root"; + args[i++] = arg_system ? "--system" : "--user"; + args[i++] = "--deserialize"; + args[i++] = sfd; + args[i++] = NULL; + + assert(i <= args_size); + + /* + * We want valgrind to print its memory usage summary before reexecution. + * Valgrind won't do this is on its own on exec(), but it will do it on exit(). + * Hence, to ensure we get a summary here, fork() off a child, let it exit() cleanly, + * so that it prints the summary, and wait() for it in the parent, before proceeding into the exec(). + */ + valgrind_summary_hack(); + + (void) execv(args[0], (char* const*) args); + } + + /* Try the fallback, if there is any, without any + * serialization. We pass the original argv[] and + * envp[]. (Well, modulo the ordering changes due to + * getopt() in argv[], and some cleanups in envp[], + * but let's hope that doesn't matter.) */ + + arg_serialization = safe_fclose(arg_serialization); + fds = fdset_free(fds); + + /* Reopen the console */ + (void) make_console_stdio(); + + for (j = 1, i = 1; j < (unsigned) argc; j++) + args[i++] = argv[j]; + args[i++] = NULL; + assert(i <= args_size); + + /* Reenable any blocked signals, especially important + * if we switch from initial ramdisk to init=... */ + (void) reset_all_signal_handlers(); + (void) reset_signal_mask(); + + if (switch_root_init) { + args[0] = switch_root_init; + (void) execv(args[0], (char* const*) args); + log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m"); + } + + args[0] = "/sbin/init"; + (void) execv(args[0], (char* const*) args); + + if (errno == ENOENT) { + log_warning("No /sbin/init, trying fallback"); + + args[0] = "/bin/sh"; + args[1] = NULL; + (void) execv(args[0], (char* const*) args); + log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m"); + } else + log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m"); + } + + arg_serialization = safe_fclose(arg_serialization); + fds = fdset_free(fds); + +#ifdef HAVE_VALGRIND_VALGRIND_H + /* If we are PID 1 and running under valgrind, then let's exit + * here explicitly. valgrind will only generate nice output on + * exit(), not on exec(), hence let's do the former not the + * latter here. */ + if (getpid() == 1 && RUNNING_ON_VALGRIND) + return 0; +#endif + + if (shutdown_verb) { + char log_level[DECIMAL_STR_MAX(int) + 1]; + char exit_code[DECIMAL_STR_MAX(uint8_t) + 1]; + const char* command_line[11] = { + SYSTEMD_SHUTDOWN_BINARY_PATH, + shutdown_verb, + "--log-level", log_level, + "--log-target", + }; + unsigned pos = 5; + _cleanup_strv_free_ char **env_block = NULL; + + assert(command_line[pos] == NULL); + env_block = strv_copy(environ); + + xsprintf(log_level, "%d", log_get_max_level()); + + switch (log_get_target()) { + + case LOG_TARGET_KMSG: + case LOG_TARGET_JOURNAL_OR_KMSG: + case LOG_TARGET_SYSLOG_OR_KMSG: + command_line[pos++] = "kmsg"; + break; + + case LOG_TARGET_NULL: + command_line[pos++] = "null"; + break; + + case LOG_TARGET_CONSOLE: + default: + command_line[pos++] = "console"; + break; + }; + + if (log_get_show_color()) + command_line[pos++] = "--log-color"; + + if (log_get_show_location()) + command_line[pos++] = "--log-location"; + + if (streq(shutdown_verb, "exit")) { + command_line[pos++] = "--exit-code"; + command_line[pos++] = exit_code; + xsprintf(exit_code, "%d", retval); + } + + assert(pos < ELEMENTSOF(command_line)); + + if (arm_reboot_watchdog && arg_shutdown_watchdog > 0 && arg_shutdown_watchdog != USEC_INFINITY) { + char *e; + + /* If we reboot let's set the shutdown + * watchdog and tell the shutdown binary to + * repeatedly ping it */ + r = watchdog_set_timeout(&arg_shutdown_watchdog); + watchdog_close(r < 0); + + /* Tell the binary how often to ping, ignore failure */ + if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0) + (void) strv_push(&env_block, e); + } else + watchdog_close(true); + + /* Avoid the creation of new processes forked by the + * kernel; at this point, we will not listen to the + * signals anyway */ + if (detect_container() <= 0) + (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER); + + execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block); + log_error_errno(errno, "Failed to execute shutdown binary, %s: %m", + getpid() == 1 ? "freezing" : "quitting"); + } + + if (getpid() == 1) { + if (error_message) + manager_status_printf(NULL, STATUS_TYPE_EMERGENCY, + ANSI_HIGHLIGHT_RED "!!!!!!" ANSI_NORMAL, + "%s, freezing.", error_message); + freeze_or_reboot(); + } + + return retval; +} |