#include <stdio.h>

#include <errno.h>

#include <string.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <getopt.h>

#include <signal.h>

#include <sys/wait.h>

#include <fcntl.h>

#include <sys/prctl.h>

#include <sys/mount.h>

#ifdef HAVE_VALGRIND_VALGRIND_H

#include <valgrind/valgrind.h>

#endif

#ifdef HAVE_SECCOMP

#include <seccomp.h>

#endif

#include "sd-daemon.h"

#include "sd-messages.h"

#include "sd-bus.h"

#include "log.h"

#include "fdset.h"

#include "special.h"

#include "conf-parser.h"

#include "missing.h"

#include "label.h"

#include "pager.h"

#include "build.h"

#include "strv.h"

#include "def.h"

#include "virt.h"

#include "architecture.h"

#include "watchdog.h"

#include "path-util.h"

#include "switch-root.h"

#include "capability.h"

#include "killall.h"

#include "env-util.h"

#include "clock-util.h"

#include "fileio.h"

#include "bus-error.h"

#include "bus-util.h"

#include "selinux-util.h"

#include "manager.h"

#include "dbus-manager.h"

#include "load-fragment.h"

#include "mount-setup.h"

#include "loopback-setup.h"

#include "hostname-setup.h"

#include "machine-id-setup.h"

#include "selinux-setup.h"

#include "ima-setup.h"

#include "smack-setup.h"

#include "kmod-setup.h"

static enum {

ACTION_RUN,

ACTION_HELP,

ACTION_VERSION,

ACTION_TEST,

ACTION_DUMP_CONFIGURATION_ITEMS,

ACTION_DONE

} arg_action = ACTION_RUN;

static char *arg_default_unit = NULL;

static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;

static bool arg_dump_core = true;

static bool arg_crash_shell = false;

static int arg_crash_chvt = -1;

static bool arg_confirm_spawn = false;

static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;

static bool arg_switched_root = false;

static int arg_no_pager = -1;

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_drop = 0;

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_blockio_accounting = false;

static bool arg_default_memory_accounting = false;

static void nop_handler(int sig) {}

static void pager_open_if_enabled(void) {

if (arg_no_pager <= 0)

return;

pager_open(false);

}

noreturn static void crash(int sig) {

if (getpid() != 1)

/* Pass this on immediately, if this is not PID 1 */

raise(sig);

else if (!arg_dump_core)

log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));

else {

struct sigaction sa = {

.sa_handler = nop_handler,

.sa_flags = SA_NOCLDSTOP|SA_RESTART,

};

pid_t pid;

/* We want to wait for the core process, hence let's enable SIGCHLD */

sigaction(SIGCHLD, &sa, NULL);

pid = raw_clone(SIGCHLD, NULL);

if (pid < 0)

log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));

else if (pid == 0) {

struct rlimit rl = {};

/* Enable default signal handler for core dump */

zero(sa);

sa.sa_handler = SIG_DFL;

sigaction(sig, &sa, NULL);

/* Don't limit the core dump size */

rl.rlim_cur = RLIM_INFINITY;

rl.rlim_max = RLIM_INFINITY;

setrlimit(RLIMIT_CORE, &rl);

/* Just to be sure... */

chdir("/");

/* Raise the signal again */

pid = raw_getpid();

kill(pid, sig); /* raise() would kill the parent */

assert_not_reached("We shouldn't be here...");

_exit(1);

} 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_FULL)

: 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)

chvt(arg_crash_chvt);

if (arg_crash_shell) {

struct sigaction sa = {

.sa_handler = SIG_IGN,

.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,

};

pid_t pid;

log_info("Executing crash shell in 10s...");

sleep(10);

/* Let the kernel reap children for us */

assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);

pid = raw_clone(SIGCHLD, NULL);

if (pid < 0)

log_emergency_errno(errno, "Failed to fork off crash shell: %m");

else if (pid == 0) {

make_console_stdio();

execle("/bin/sh", "/bin/sh", NULL, environ);

log_emergency_errno(errno, "execle() failed: %m");

_exit(1);

} else

log_info("Successfully spawned crash shell as PID "PID_FMT".", pid);

}

log_emergency("Freezing execution.");

freeze();

}

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

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

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 set_default_unit(const char *u) {

char *c;

assert(u);

c = strdup(u);

if (!c)

return -ENOMEM;

free(arg_default_unit);

arg_default_unit = c;

return 0;

}

static int parse_proc_cmdline_item(const char *key, const char *value) {

static const char * const rlmap[] = {

"emergency", SPECIAL_EMERGENCY_TARGET,

"-b", SPECIAL_EMERGENCY_TARGET,

"rescue", SPECIAL_RESCUE_TARGET,

"single", SPECIAL_RESCUE_TARGET,

"-s", SPECIAL_RESCUE_TARGET,

"s", SPECIAL_RESCUE_TARGET,

"S", SPECIAL_RESCUE_TARGET,

"1", SPECIAL_RESCUE_TARGET,

"2", SPECIAL_RUNLEVEL2_TARGET,

"3", SPECIAL_RUNLEVEL3_TARGET,

"4", SPECIAL_RUNLEVEL4_TARGET,

"5", SPECIAL_RUNLEVEL5_TARGET,

};

int r;

assert(key);

if (streq(key, "systemd.unit") && value) {

if (!in_initrd())

return set_default_unit(value);

} else if (streq(key, "rd.systemd.unit") && value) {

if (in_initrd())

return set_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_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_chvt") && value) {

if (safe_atoi(value, &r) < 0)

log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);

else

arg_crash_chvt = 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, "quiet") && !value) {

log_set_max_level(LOG_NOTICE);

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'

if (detect_container(NULL) > 0)

log_set_target(LOG_TARGET_CONSOLE);

} else if (!in_initrd() && !value) {

unsigned i;

/* SysV compatibility */

for (i = 0; i < ELEMENTSOF(rlmap); i += 2)

if (streq(key, rlmap[i]))

return set_default_unit(rlmap[i+1]);

}

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': %s", \

rvalue, strerror(-r)); \

\

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) {

const char *word, *state;

size_t l;

cpu_set_t *c = NULL;

unsigned ncpus = 0;

assert(filename);

assert(lvalue);

assert(rvalue);

FOREACH_WORD_QUOTED(word, l, rvalue, state) {

char *t;

int r;

unsigned cpu;

if (!(t = strndup(word, l)))

return log_oom();

r = safe_atou(t, &cpu);

free(t);

if (!c)

if (!(c = cpu_set_malloc(&ncpus)))

return log_oom();

if (r < 0 || cpu >= ncpus) {

log_syntax(unit, LOG_ERR, filename, line, -r,

"Failed to parse CPU affinity '%s'", rvalue);

CPU_FREE(c);

return -EBADMSG;

}

CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);

}

if (!isempty(state))

log_syntax(unit, LOG_ERR, filename, line, EINVAL,

"Trailing garbage, ignoring.");

if (c) {

if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)

log_unit_warning(unit, "Failed to set CPU affinity: %m");

CPU_FREE(c);

}

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 void strv_free_free(char ***l) {

char ***i;

if (!l)

return;

for (i = l; *i; i++)

strv_free(*i);

free(l);

}

static void free_join_controllers(void) {

strv_free_free(arg_join_controllers);

arg_join_controllers = NULL;

}

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) {

unsigned n = 0;

const char *word, *state;

size_t length;

assert(filename);

assert(lvalue);

assert(rvalue);

free_join_controllers();

FOREACH_WORD_QUOTED(word, length, rvalue, state) {

char *s, **l;

s = strndup(word, length);

if (!s)

return log_oom();

l = strv_split(s, ",");

free(s);

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) < 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(state))

log_syntax(unit, LOG_ERR, filename, line, EINVAL,

"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", "CrashShell", config_parse_bool, 0, &arg_crash_shell },

{ "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },

{ "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },

{ "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_bounding_set, 0, &arg_capability_bounding_set_drop },

#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 },

{ "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, 0, &arg_default_rlimit[RLIMIT_CPU] },

{ "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },

{ "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },

{ "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },

{ "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },

{ "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },

{ "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },

{ "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },

{ "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },

{ "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },

{ "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },

{ "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },

{ "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },

{ "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },

{ "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },

{ "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },

{ "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },

{ "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },

{ "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },

{}

};

const char *fn, *conf_dirs_nulstr;

fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";

conf_dirs_nulstr = arg_running_as == SYSTEMD_SYSTEM ? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");

config_parse_many(fn, conf_dirs_nulstr, "Manager\0",

config_item_table_lookup, items, false, NULL);

return 0;

}

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_SHELL,

ARG_CONFIRM_SPAWN,

ARG_SHOW_STATUS,

ARG_DESERIALIZE,

ARG_SWITCHED_ROOT,

ARG_DEFAULT_STD_OUTPUT,

ARG_DEFAULT_STD_ERROR

};

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-shell", optional_argument, NULL, ARG_CRASH_SHELL },

{ "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, },

{}

};

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 = set_default_unit(optarg);

if (r < 0)

return log_error_errno(r, "Failed to set default unit %s: %m", optarg);

break;

case ARG_SYSTEM:

arg_running_as = SYSTEMD_SYSTEM;

break;

case ARG_USER:

arg_running_as = SYSTEMD_USER;

break;

case ARG_TEST:

arg_action = ACTION_TEST;

if (arg_no_pager < 0)

arg_no_pager = true;

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:

r = optarg ? parse_boolean(optarg) : 1;

if (r < 0) {

log_error("Failed to parse dump core boolean %s.", optarg);

return r;

}

arg_dump_core = r;

break;

case ARG_CRASH_SHELL:

r = optarg ? parse_boolean(optarg) : 1;

if (r < 0) {

log_error("Failed to parse crash shell boolean %s.", optarg);

return r;

}

arg_crash_shell = 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 r < 0 ? r : -EINVAL;

}

fd_cloexec(fd, true);

f = fdopen(fd, "r");

if (!f)

return log_error_errno(errno, "Failed to open serialization fd: %m");

if (arg_serialization)

fclose(arg_serialization);

arg_serialization = f;

break;

}

case ARG_SWITCHED_ROOT:

arg_switched_root = true;

break;

case 'h':

arg_action = ACTION_HELP;

if (arg_no_pager < 0)

arg_no_pager = true;

break;

case 'D':

log_set_max_level(LOG_DEBUG);

break;

case 'b':

case 's':

case 'z':

/* Just to eat away the sysvinit kernel

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

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[=0|1] Dump core on crash\n"

" --crash-shell[=0|1] Run shell on crash\n"

" --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"

" --show-status[=0|1] 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[=0|1] Highlight important log messages\n"

" --log-location[=0|1] 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 version(void) {

puts(PACKAGE_STRING);

puts(SYSTEMD_FEATURES);

return 0;

}

static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {

FILE *f = NULL;

FDSet *fds = NULL;

int r;

assert(m);

assert(_f);

assert(_fds);

r = manager_open_serialization(m, &f);

if (r < 0) {

log_error_errno(r, "Failed to create serialization file: %m");

goto fail;

}

/* Make sure nothing is really destructed when we shut down */

m->n_reloading ++;

bus_manager_send_reloading(m, true);

fds = fdset_new();

if (!fds) {

r = -ENOMEM;

log_error_errno(r, "Failed to allocate fd set: %m");

goto fail;

}

r = manager_serialize(m, f, fds, switching_root);

if (r < 0) {

log_error_errno(r, "Failed to serialize state: %m");

goto fail;

}

if (fseeko(f, 0, SEEK_SET) < 0) {

log_error_errno(errno, "Failed to rewind serialization fd: %m");

goto fail;

}

r = fd_cloexec(fileno(f), false);

if (r < 0) {

log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");

goto fail;

}

r = fdset_cloexec(fds, false);

if (r < 0) {

log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");

goto fail;

}

*_f = f;

*_fds = fds;

return 0;

fail:

fdset_free(fds);

if (f)

fclose(f);

return r;

}

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

if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)

return log_error_errno(errno, "Reading RLIMIT_NOFILE failed: %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_error_errno(r, "Setting RLIMIT_NOFILE failed: %m");

return 0;

}

static void test_mtab(void) {

static const char ok[] =

"/proc/self/mounts\0"

"/proc/mounts\0"

"../proc/self/mounts\0"

"../proc/mounts\0";

_cleanup_free_ char *p = NULL;

int r;

/* Check that /etc/mtab is a symlink to the right place or

r = readlink_malloc("/etc/mtab", &p);

if (r == -ENOENT)

return;

if (r >= 0 && nulstr_contains(ok, p))

return;

log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "

"This is not supported anymore. "

"Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");

}

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"

arg_join_controllers = new(char**, 3);

if (!arg_join_controllers)

return -ENOMEM;

arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);

arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);

arg_join_controllers[2] = NULL;

if (!arg_join_controllers[0] || !arg_join_controllers[1]) {

free_join_controllers();

return -ENOMEM;

}

return 0;

}

static int enforce_syscall_archs(Set *archs) {

#ifdef HAVE_SECCOMP

scmp_filter_ctx *seccomp;

Iterator i;

void *id;

int r;

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");

return status_printf(NULL, false, false,

"\nWelcome to \x1B[%sm%s\x1B[0m!\n",

isempty(ansi_color) ? "1" : ansi_color,

isempty(pretty_name) ? "Linux" : pretty_name);

}

static int write_container_id(void) {

const char *c;

c = getenv("container");

if (isempty(c))

return 0;

return write_string_file("/run/systemd/container", c);

}

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 = { 0ULL, 0ULL };

dual_timestamp userspace_timestamp = { 0ULL, 0ULL };

dual_timestamp kernel_timestamp = { 0ULL, 0ULL };

dual_timestamp security_start_timestamp = { 0ULL, 0ULL };

dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };

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;

static struct rlimit saved_rlimit_nofile = { 0, 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

errno = -ENOENT;

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

if (strv_find(argv+1, "--deserialize"))

skip_setup = true;

/* If we have switched root, do all the special setup

if (strv_find(argv+1, "--switched-root"))

skip_setup = false;

/* If we get started via the /sbin/init symlink then we are

program_invocation_short_name = systemd;

prctl(PR_SET_NAME, systemd);

saved_argv = argv;

saved_argc = argc;

log_show_color(isatty(STDERR_FILENO) > 0);

log_set_upgrade_syslog_to_journal(true);

/* Disable the umask logic */

if (getpid() == 1)

umask(0);

if (getpid() == 1 && detect_container(NULL) <= 0) {

/* Running outside of a container as PID 1 */

arg_running_as = SYSTEMD_SYSTEM;

make_null_stdio();

log_set_target(LOG_TARGET_KMSG);

log_open();

if (in_initrd())

initrd_timestamp = userspace_timestamp;

if (!skip_setup) {

mount_setup_early();

dual_timestamp_get(&security_start_timestamp);

if (mac_selinux_setup(&loaded_policy) < 0) {

error_message = "Failed to load SELinux policy";

goto finish;

} else if (ima_setup() < 0) {

error_message = "Failed to load IMA policy";

goto finish;

} else if (mac_smack_setup(&loaded_policy) < 0) {

error_message = "Failed to load SMACK policy";

goto finish;

}

dual_timestamp_get(&security_finish_timestamp);

}

if (mac_selinux_init(NULL) < 0) {

error_message = "Failed to initialize SELinux policy";

goto finish;

}

if (!skip_setup) {

if (clock_is_localtime() > 0) {

int min;

/*

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()) {

/*

clock_reset_timewarp();

}

}

/* Set the default for later on, but don't actually

log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);

} else if (getpid() == 1) {

/* Running inside a container, as PID 1 */

arg_running_as = SYSTEMD_SYSTEM;

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,

kernel_timestamp.monotonic = 0ULL;

kernel_timestamp.realtime = 0ULL;

} else {

/* Running as user instance */

arg_running_as = SYSTEMD_USER;

log_set_target(LOG_TARGET_AUTO);

log_open();

/* clear the kernel timestamp,

kernel_timestamp.monotonic = 0ULL;

kernel_timestamp.realtime = 0ULL;

}

/* Initialize default unit */

r = set_default_unit(SPECIAL_DEFAULT_TARGET);

if (r < 0) {

log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);

error_message = "Failed to set default unit";

goto finish;

}

r = initialize_join_controllers();

if (r < 0) {

error_message = "Failed to initalize cgroup controllers";

goto finish;

}

/* Mount /proc, /sys and friends, so that /proc/cmdline and

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. */

assert_se(reset_all_signal_handlers() == 0);

ignore_signals(SIGNALS_IGNORE, -1);

if (parse_config_file() < 0) {

error_message = "Failed to parse config file";

goto finish;

}

if (arg_running_as == SYSTEMD_SYSTEM) {

r = parse_proc_cmdline(parse_proc_cmdline_item);

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

log_parse_environment();

if (parse_argv(argc, argv) < 0) {

error_message = "Failed to parse commandline arguments";

goto finish;

}

if (arg_action == ACTION_TEST &&

geteuid() == 0) {

log_error("Don't run test mode as root.");

goto finish;

}

if (arg_running_as == SYSTEMD_USER &&

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_running_as == SYSTEMD_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)

skip_setup = true;

pager_open_if_enabled();

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) {

unit_dump_config_items(stdout);

retval = EXIT_SUCCESS;

goto finish;

} else if (arg_action == ACTION_DONE) {

retval = EXIT_SUCCESS;

goto finish;

}

if (arg_running_as == SYSTEMD_USER &&

!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_running_as == SYSTEMD_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

if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN) {

/* If we are init, we connect stdin/stdout/stderr to

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

if (getpid() == 1) {

install_crash_handler();

r = mount_cgroup_controllers(arg_join_controllers);

if (r < 0)

goto finish;

}

if (arg_running_as == SYSTEMD_SYSTEM) {

const char *virtualization = NULL;

log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",

arg_action == ACTION_TEST ? "test " : "" );

detect_virtualization(&virtualization);

if (virtualization)

log_info("Detected virtualization '%s'.", virtualization);

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

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_running_as == SYSTEMD_SYSTEM && !skip_setup) {

if (arg_show_status > 0 || plymouth_running())

status_welcome();

hostname_setup();

machine_id_setup(NULL);

loopback_setup();

test_mtab();

test_usr();

}

if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)

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 (arg_capability_bounding_set_drop) {

r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);

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_drop, 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_running_as == SYSTEMD_USER) {

/* 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 (errno == EINVAL)

log_info("Perhaps the kernel version is too old (< 3.4?)");

}

}

if (arg_running_as == SYSTEMD_SYSTEM) {

bump_rlimit_nofile(&saved_rlimit_nofile);

if (empty_etc) {

r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);

if (r < 0)

log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");

else

log_info("Populated /etc with preset unit settings.");

}

}

r = manager_new(arg_running_as, 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->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_restart_usec = arg_default_restart_usec;

m->default_timeout_start_usec = arg_default_timeout_start_usec;

m->default_timeout_stop_usec = arg_default_timeout_stop_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_blockio_accounting = arg_default_blockio_accounting;

m->default_memory_accounting = arg_default_memory_accounting;

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;

manager_set_default_rlimits(m, arg_default_rlimit);

manager_environment_add(m, NULL, arg_default_environment);

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

fdset_free(fds);

fds = NULL;

if (arg_serialization) {

fclose(arg_serialization);

arg_serialization = NULL;

}

if (queue_default_job) {

_cleanup_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, false, &error, &default_unit_job);

if (r == -EPERM) {

log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));

r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &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_EXIT:

retval = EXIT_SUCCESS;

log_debug("Exit.");

goto finish;

case MANAGER_RELOAD:

log_info("Reloading.");

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 reexection";

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 reexection";

goto finish;

}

reexecute = true;

log_notice("Switching root.");

goto finish;

case MANAGER_REBOOT:

case MANAGER_POWEROFF:

case MANAGER_HALT:

case MANAGER_KEXEC: {

static const char * const table[_MANAGER_EXIT_CODE_MAX] = {

[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();

m = manager_free(m);

for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {

free(arg_default_rlimit[j]);

arg_default_rlimit[j] = NULL;

}

free(arg_default_unit);

arg_default_unit = NULL;

free_join_controllers();

strv_free(arg_default_environment);

arg_default_environment = NULL;

set_free(arg_syscall_archs);

arg_syscall_archs = NULL;

mac_selinux_finish();

if (reexecute) {

const char **args;

unsigned i, args_size;

/* Close and disarm the watchdog, so that the new

watchdog_close(true);

/* Reset the RLIMIT_NOFILE to the kernel default, so

if (saved_rlimit_nofile.rlim_cur > 0)

setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);

if (switch_root_dir) {

/* Kill all remaining processes from the

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[16];

/* First try to spawn ourselves with the right

assert(arg_serialization);

assert(fds);

snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));

char_array_0(sfd);

i = 0;

args[i++] = SYSTEMD_BINARY_PATH;

if (switch_root_dir)

args[i++] = "--switched-root";

args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";

args[i++] = "--deserialize";

args[i++] = sfd;

args[i++] = NULL;

/* do not pass along the environment we inherit from the kernel or initrd */

if (switch_root_dir)

clearenv();

assert(i <= args_size);

execv(args[0], (char* const*) args);

}

/* Try the fallback, if there is any, without any

if (arg_serialization) {

fclose(arg_serialization);

arg_serialization = NULL;

}

if (fds) {

fdset_free(fds);

fds = NULL;

}

/* Reopen the console */

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

reset_all_signal_handlers();

reset_signal_mask();

if (switch_root_init) {

args[0] = switch_root_init;

execv(args[0], (char* const*) args);

log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");

}

args[0] = "/sbin/init";

execv(args[0], (char* const*) args);

if (errno == ENOENT) {

log_warning("No /sbin/init, trying fallback");

args[0] = "/bin/sh";

args[1] = NULL;

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");

}

if (arg_serialization) {

fclose(arg_serialization);

arg_serialization = NULL;

}

if (fds) {

fdset_free(fds);

fds = NULL;

}

#ifdef HAVE_VALGRIND_VALGRIND_H

/* If we are PID 1 and running under valgrind, then let's exit

if (getpid() == 1 && RUNNING_ON_VALGRIND)

return 0;

#endif

if (shutdown_verb) {

char log_level[DECIMAL_STR_MAX(int) + 1];

const char* command_line[9] = {

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);

snprintf(log_level, sizeof(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_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";

assert(pos < ELEMENTSOF(command_line));

if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {

char *e;

/* If we reboot let's set the shutdown

watchdog_set_timeout(&arg_shutdown_watchdog);

watchdog_close(false);

/* Tell the binary how often to ping, ignore failure */

if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)

strv_push(&env_block, e);

} else

watchdog_close(true);

/* Avoid the creation of new processes forked by the

if (detect_container(NULL) <= 0)

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_ON "!!!!!!" ANSI_HIGHLIGHT_OFF,

"%s, freezing.", error_message);

freeze();

}

return retval;

}