1 /* SPDX-License-Identifier: LGPL-2.1+ */
10 #include <sys/prctl.h>
11 #include <sys/reboot.h>
17 #if HAVE_VALGRIND_VALGRIND_H
18 #include <valgrind/valgrind.h>
22 #include "sd-daemon.h"
23 #include "sd-messages.h"
25 #include "alloc-util.h"
26 #include "architecture.h"
28 #include "bus-error.h"
30 #include "capability-util.h"
31 #include "clock-util.h"
32 #include "conf-parser.h"
33 #include "cpu-set-util.h"
35 #include "dbus-manager.h"
37 #include "emergency-action.h"
39 #include "exit-status.h"
43 #include "format-util.h"
45 #include "hostname-setup.h"
46 #include "ima-setup.h"
48 #include "kmod-setup.h"
49 #include "load-fragment.h"
51 #include "loopback-setup.h"
52 #include "machine-id-setup.h"
55 #include "mount-setup.h"
58 #include "parse-util.h"
59 #include "path-util.h"
60 #include "proc-cmdline.h"
61 #include "process-util.h"
62 #include "raw-clone.h"
63 #include "rlimit-util.h"
65 #include "seccomp-util.h"
67 #include "selinux-setup.h"
68 #include "selinux-util.h"
69 #include "signal-util.h"
70 #include "smack-setup.h"
72 #include "stat-util.h"
73 #include "stdio-util.h"
75 #include "switch-root.h"
76 #include "terminal-util.h"
77 #include "umask-util.h"
78 #include "user-util.h"
88 ACTION_DUMP_CONFIGURATION_ITEMS
,
89 ACTION_DUMP_BUS_PROPERTIES
,
90 } arg_action
= ACTION_RUN
;
91 static char *arg_default_unit
= NULL
;
92 static bool arg_system
= false;
93 static bool arg_dump_core
= true;
94 static int arg_crash_chvt
= -1;
95 static bool arg_crash_shell
= false;
96 static bool arg_crash_reboot
= false;
97 static char *arg_confirm_spawn
= NULL
;
98 static ShowStatus arg_show_status
= _SHOW_STATUS_INVALID
;
99 static bool arg_switched_root
= false;
100 static bool arg_no_pager
= false;
101 static bool arg_service_watchdogs
= true;
102 static char ***arg_join_controllers
= NULL
;
103 static ExecOutput arg_default_std_output
= EXEC_OUTPUT_JOURNAL
;
104 static ExecOutput arg_default_std_error
= EXEC_OUTPUT_INHERIT
;
105 static usec_t arg_default_restart_usec
= DEFAULT_RESTART_USEC
;
106 static usec_t arg_default_timeout_start_usec
= DEFAULT_TIMEOUT_USEC
;
107 static usec_t arg_default_timeout_stop_usec
= DEFAULT_TIMEOUT_USEC
;
108 static usec_t arg_default_start_limit_interval
= DEFAULT_START_LIMIT_INTERVAL
;
109 static unsigned arg_default_start_limit_burst
= DEFAULT_START_LIMIT_BURST
;
110 static usec_t arg_runtime_watchdog
= 0;
111 static usec_t arg_shutdown_watchdog
= 10 * USEC_PER_MINUTE
;
112 static char *arg_early_core_pattern
= NULL
;
113 static char *arg_watchdog_device
= NULL
;
114 static char **arg_default_environment
= NULL
;
115 static struct rlimit
*arg_default_rlimit
[_RLIMIT_MAX
] = {};
116 static uint64_t arg_capability_bounding_set
= CAP_ALL
;
117 static bool arg_no_new_privs
= false;
118 static nsec_t arg_timer_slack_nsec
= NSEC_INFINITY
;
119 static usec_t arg_default_timer_accuracy_usec
= 1 * USEC_PER_MINUTE
;
120 static Set
* arg_syscall_archs
= NULL
;
121 static FILE* arg_serialization
= NULL
;
122 static bool arg_default_cpu_accounting
= false;
123 static bool arg_default_io_accounting
= false;
124 static bool arg_default_ip_accounting
= false;
125 static bool arg_default_blockio_accounting
= false;
126 static bool arg_default_memory_accounting
= MEMORY_ACCOUNTING_DEFAULT
;
127 static bool arg_default_tasks_accounting
= true;
128 static uint64_t arg_default_tasks_max
= UINT64_MAX
;
129 static sd_id128_t arg_machine_id
= {};
130 static EmergencyAction arg_cad_burst_action
= EMERGENCY_ACTION_REBOOT_FORCE
;
132 _noreturn_
static void freeze_or_reboot(void) {
134 if (arg_crash_reboot
) {
135 log_notice("Rebooting in 10s...");
138 log_notice("Rebooting now...");
139 (void) reboot(RB_AUTOBOOT
);
140 log_emergency_errno(errno
, "Failed to reboot: %m");
143 log_emergency("Freezing execution.");
147 _noreturn_
static void crash(int sig
) {
151 if (getpid_cached() != 1)
152 /* Pass this on immediately, if this is not PID 1 */
154 else if (!arg_dump_core
)
155 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig
));
157 sa
= (struct sigaction
) {
158 .sa_handler
= nop_signal_handler
,
159 .sa_flags
= SA_NOCLDSTOP
|SA_RESTART
,
162 /* We want to wait for the core process, hence let's enable SIGCHLD */
163 (void) sigaction(SIGCHLD
, &sa
, NULL
);
165 pid
= raw_clone(SIGCHLD
);
167 log_emergency_errno(errno
, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig
));
169 /* Enable default signal handler for core dump */
171 sa
= (struct sigaction
) {
172 .sa_handler
= SIG_DFL
,
174 (void) sigaction(sig
, &sa
, NULL
);
176 /* Don't limit the coredump size */
177 (void) setrlimit(RLIMIT_CORE
, &RLIMIT_MAKE_CONST(RLIM_INFINITY
));
179 /* Just to be sure... */
182 /* Raise the signal again */
184 (void) kill(pid
, sig
); /* raise() would kill the parent */
186 assert_not_reached("We shouldn't be here...");
192 /* Order things nicely. */
193 r
= wait_for_terminate(pid
, &status
);
195 log_emergency_errno(r
, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig
));
196 else if (status
.si_code
!= CLD_DUMPED
)
197 log_emergency("Caught <%s>, core dump failed (child "PID_FMT
", code=%s, status=%i/%s).",
198 signal_to_string(sig
),
199 pid
, sigchld_code_to_string(status
.si_code
),
201 strna(status
.si_code
== CLD_EXITED
202 ? exit_status_to_string(status
.si_status
, EXIT_STATUS_MINIMAL
)
203 : signal_to_string(status
.si_status
)));
205 log_emergency("Caught <%s>, dumped core as pid "PID_FMT
".", signal_to_string(sig
), pid
);
209 if (arg_crash_chvt
>= 0)
210 (void) chvt(arg_crash_chvt
);
212 sa
= (struct sigaction
) {
213 .sa_handler
= SIG_IGN
,
214 .sa_flags
= SA_NOCLDSTOP
|SA_NOCLDWAIT
|SA_RESTART
,
217 /* Let the kernel reap children for us */
218 (void) sigaction(SIGCHLD
, &sa
, NULL
);
220 if (arg_crash_shell
) {
221 log_notice("Executing crash shell in 10s...");
224 pid
= raw_clone(SIGCHLD
);
226 log_emergency_errno(errno
, "Failed to fork off crash shell: %m");
229 (void) make_console_stdio();
230 (void) execle("/bin/sh", "/bin/sh", NULL
, environ
);
232 log_emergency_errno(errno
, "execle() failed: %m");
235 log_info("Spawned crash shell as PID "PID_FMT
".", pid
);
236 (void) wait_for_terminate(pid
, NULL
);
243 static void install_crash_handler(void) {
244 static const struct sigaction sa
= {
246 .sa_flags
= SA_NODEFER
, /* So that we can raise the signal again from the signal handler */
250 /* We ignore the return value here, since, we don't mind if we
251 * cannot set up a crash handler */
252 r
= sigaction_many(&sa
, SIGNALS_CRASH_HANDLER
, -1);
254 log_debug_errno(r
, "I had trouble setting up the crash handler, ignoring: %m");
257 static int console_setup(void) {
258 _cleanup_close_
int tty_fd
= -1;
261 tty_fd
= open_terminal("/dev/console", O_WRONLY
|O_NOCTTY
|O_CLOEXEC
);
263 return log_error_errno(tty_fd
, "Failed to open /dev/console: %m");
265 /* We don't want to force text mode. plymouth may be showing
266 * pictures already from initrd. */
267 r
= reset_terminal_fd(tty_fd
, false);
269 return log_error_errno(r
, "Failed to reset /dev/console: %m");
274 static int parse_crash_chvt(const char *value
) {
277 if (safe_atoi(value
, &arg_crash_chvt
) >= 0)
280 b
= parse_boolean(value
);
285 arg_crash_chvt
= 0; /* switch to where kmsg goes */
287 arg_crash_chvt
= -1; /* turn off switching */
292 static int parse_confirm_spawn(const char *value
, char **console
) {
296 r
= value
? parse_boolean(value
) : 1;
302 if (r
> 0) /* on with default tty */
303 s
= strdup("/dev/console");
304 else if (is_path(value
)) /* on with fully qualified path */
306 else /* on with only a tty file name, not a fully qualified path */
307 s
= strjoin("/dev/", value
);
315 static int set_machine_id(const char *m
) {
319 if (sd_id128_from_string(m
, &t
) < 0)
322 if (sd_id128_is_null(t
))
329 static int parse_proc_cmdline_item(const char *key
, const char *value
, void *data
) {
335 if (STR_IN_SET(key
, "systemd.unit", "rd.systemd.unit")) {
337 if (proc_cmdline_value_missing(key
, value
))
340 if (!unit_name_is_valid(value
, UNIT_NAME_PLAIN
|UNIT_NAME_INSTANCE
))
341 log_warning("Unit name specified on %s= is not valid, ignoring: %s", key
, value
);
342 else if (in_initrd() == !!startswith(key
, "rd.")) {
343 if (free_and_strdup(&arg_default_unit
, value
) < 0)
347 } else if (proc_cmdline_key_streq(key
, "systemd.dump_core")) {
349 r
= value
? parse_boolean(value
) : true;
351 log_warning("Failed to parse dump core switch %s. Ignoring.", value
);
355 } else if (proc_cmdline_key_streq(key
, "systemd.early_core_pattern")) {
357 if (proc_cmdline_value_missing(key
, value
))
360 if (path_is_absolute(value
))
361 (void) parse_path_argument_and_warn(value
, false, &arg_early_core_pattern
);
363 log_warning("Specified core pattern '%s' is not an absolute path, ignoring.", value
);
365 } else if (proc_cmdline_key_streq(key
, "systemd.crash_chvt")) {
368 arg_crash_chvt
= 0; /* turn on */
369 else if (parse_crash_chvt(value
) < 0)
370 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value
);
372 } else if (proc_cmdline_key_streq(key
, "systemd.crash_shell")) {
374 r
= value
? parse_boolean(value
) : true;
376 log_warning("Failed to parse crash shell switch %s. Ignoring.", value
);
380 } else if (proc_cmdline_key_streq(key
, "systemd.crash_reboot")) {
382 r
= value
? parse_boolean(value
) : true;
384 log_warning("Failed to parse crash reboot switch %s. Ignoring.", value
);
386 arg_crash_reboot
= r
;
388 } else if (proc_cmdline_key_streq(key
, "systemd.confirm_spawn")) {
391 r
= parse_confirm_spawn(value
, &s
);
393 log_warning_errno(r
, "Failed to parse confirm_spawn switch %s. Ignoring.", value
);
395 free(arg_confirm_spawn
);
396 arg_confirm_spawn
= s
;
399 } else if (proc_cmdline_key_streq(key
, "systemd.service_watchdogs")) {
401 r
= value
? parse_boolean(value
) : true;
403 log_warning("Failed to parse service watchdog switch %s. Ignoring.", value
);
405 arg_service_watchdogs
= r
;
407 } else if (proc_cmdline_key_streq(key
, "systemd.show_status")) {
410 r
= parse_show_status(value
, &arg_show_status
);
412 log_warning("Failed to parse show status switch %s. Ignoring.", value
);
414 arg_show_status
= SHOW_STATUS_YES
;
416 } else if (proc_cmdline_key_streq(key
, "systemd.default_standard_output")) {
418 if (proc_cmdline_value_missing(key
, value
))
421 r
= exec_output_from_string(value
);
423 log_warning("Failed to parse default standard output switch %s. Ignoring.", value
);
425 arg_default_std_output
= r
;
427 } else if (proc_cmdline_key_streq(key
, "systemd.default_standard_error")) {
429 if (proc_cmdline_value_missing(key
, value
))
432 r
= exec_output_from_string(value
);
434 log_warning("Failed to parse default standard error switch %s. Ignoring.", value
);
436 arg_default_std_error
= r
;
438 } else if (streq(key
, "systemd.setenv")) {
440 if (proc_cmdline_value_missing(key
, value
))
443 if (env_assignment_is_valid(value
)) {
446 env
= strv_env_set(arg_default_environment
, value
);
450 arg_default_environment
= env
;
452 log_warning("Environment variable name '%s' is not valid. Ignoring.", value
);
454 } else if (proc_cmdline_key_streq(key
, "systemd.machine_id")) {
456 if (proc_cmdline_value_missing(key
, value
))
459 r
= set_machine_id(value
);
461 log_warning("MachineID '%s' is not valid. Ignoring.", value
);
463 } else if (proc_cmdline_key_streq(key
, "systemd.default_timeout_start_sec")) {
465 if (proc_cmdline_value_missing(key
, value
))
468 r
= parse_sec(value
, &arg_default_timeout_start_usec
);
470 log_warning_errno(r
, "Failed to parse default start timeout: %s, ignoring.", value
);
472 if (arg_default_timeout_start_usec
<= 0)
473 arg_default_timeout_start_usec
= USEC_INFINITY
;
475 } else if (proc_cmdline_key_streq(key
, "systemd.watchdog_device")) {
477 if (proc_cmdline_value_missing(key
, value
))
480 (void) parse_path_argument_and_warn(value
, false, &arg_watchdog_device
);
482 } else if (streq(key
, "quiet") && !value
) {
484 if (arg_show_status
== _SHOW_STATUS_INVALID
)
485 arg_show_status
= SHOW_STATUS_AUTO
;
487 } else if (streq(key
, "debug") && !value
) {
489 /* Note that log_parse_environment() handles 'debug'
490 * too, and sets the log level to LOG_DEBUG. */
492 if (detect_container() > 0)
493 log_set_target(LOG_TARGET_CONSOLE
);
498 /* SysV compatibility */
499 target
= runlevel_to_target(key
);
501 return free_and_strdup(&arg_default_unit
, target
);
507 #define DEFINE_SETTER(name, func, descr) \
508 static int name(const char *unit, \
509 const char *filename, \
511 const char *section, \
512 unsigned section_line, \
513 const char *lvalue, \
515 const char *rvalue, \
527 log_syntax(unit, LOG_ERR, filename, line, r, \
528 "Invalid " descr "'%s': %m", \
534 DEFINE_SETTER(config_parse_level2
, log_set_max_level_from_string
, "log level");
535 DEFINE_SETTER(config_parse_target
, log_set_target_from_string
, "target");
536 DEFINE_SETTER(config_parse_color
, log_show_color_from_string
, "color" );
537 DEFINE_SETTER(config_parse_location
, log_show_location_from_string
, "location");
539 static int config_parse_cpu_affinity2(
541 const char *filename
,
544 unsigned section_line
,
551 _cleanup_cpu_free_ cpu_set_t
*c
= NULL
;
554 ncpus
= parse_cpu_set_and_warn(rvalue
, &c
, unit
, filename
, line
, lvalue
);
558 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus
), c
) < 0)
559 log_warning_errno(errno
, "Failed to set CPU affinity: %m");
564 static int config_parse_show_status(
566 const char *filename
,
569 unsigned section_line
,
577 ShowStatus
*b
= data
;
584 k
= parse_show_status(rvalue
, b
);
586 log_syntax(unit
, LOG_ERR
, filename
, line
, k
, "Failed to parse show status setting, ignoring: %s", rvalue
);
593 static int config_parse_output_restricted(
595 const char *filename
,
598 unsigned section_line
,
605 ExecOutput t
, *eo
= data
;
612 t
= exec_output_from_string(rvalue
);
614 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Failed to parse output type, ignoring: %s", rvalue
);
618 if (IN_SET(t
, EXEC_OUTPUT_SOCKET
, EXEC_OUTPUT_NAMED_FD
, EXEC_OUTPUT_FILE
, EXEC_OUTPUT_FILE_APPEND
)) {
619 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Standard output types socket, fd:, file:, append: are not supported as defaults, ignoring: %s", rvalue
);
627 static int config_parse_crash_chvt(
629 const char *filename
,
632 unsigned section_line
,
645 r
= parse_crash_chvt(rvalue
);
647 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse CrashChangeVT= setting, ignoring: %s", rvalue
);
654 static int parse_config_file(void) {
656 const ConfigTableItem items
[] = {
657 { "Manager", "LogLevel", config_parse_level2
, 0, NULL
},
658 { "Manager", "LogTarget", config_parse_target
, 0, NULL
},
659 { "Manager", "LogColor", config_parse_color
, 0, NULL
},
660 { "Manager", "LogLocation", config_parse_location
, 0, NULL
},
661 { "Manager", "DumpCore", config_parse_bool
, 0, &arg_dump_core
},
662 { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt
, 0, NULL
},
663 { "Manager", "CrashChangeVT", config_parse_crash_chvt
, 0, NULL
},
664 { "Manager", "CrashShell", config_parse_bool
, 0, &arg_crash_shell
},
665 { "Manager", "CrashReboot", config_parse_bool
, 0, &arg_crash_reboot
},
666 { "Manager", "ShowStatus", config_parse_show_status
, 0, &arg_show_status
},
667 { "Manager", "CPUAffinity", config_parse_cpu_affinity2
, 0, NULL
},
668 { "Manager", "JoinControllers", config_parse_join_controllers
, 0, &arg_join_controllers
},
669 { "Manager", "RuntimeWatchdogSec", config_parse_sec
, 0, &arg_runtime_watchdog
},
670 { "Manager", "ShutdownWatchdogSec", config_parse_sec
, 0, &arg_shutdown_watchdog
},
671 { "Manager", "WatchdogDevice", config_parse_path
, 0, &arg_watchdog_device
},
672 { "Manager", "CapabilityBoundingSet", config_parse_capability_set
, 0, &arg_capability_bounding_set
},
673 { "Manager", "NoNewPrivileges", config_parse_bool
, 0, &arg_no_new_privs
},
675 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs
, 0, &arg_syscall_archs
},
677 { "Manager", "TimerSlackNSec", config_parse_nsec
, 0, &arg_timer_slack_nsec
},
678 { "Manager", "DefaultTimerAccuracySec", config_parse_sec
, 0, &arg_default_timer_accuracy_usec
},
679 { "Manager", "DefaultStandardOutput", config_parse_output_restricted
,0, &arg_default_std_output
},
680 { "Manager", "DefaultStandardError", config_parse_output_restricted
,0, &arg_default_std_error
},
681 { "Manager", "DefaultTimeoutStartSec", config_parse_sec
, 0, &arg_default_timeout_start_usec
},
682 { "Manager", "DefaultTimeoutStopSec", config_parse_sec
, 0, &arg_default_timeout_stop_usec
},
683 { "Manager", "DefaultRestartSec", config_parse_sec
, 0, &arg_default_restart_usec
},
684 { "Manager", "DefaultStartLimitInterval", config_parse_sec
, 0, &arg_default_start_limit_interval
}, /* obsolete alias */
685 { "Manager", "DefaultStartLimitIntervalSec",config_parse_sec
, 0, &arg_default_start_limit_interval
},
686 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned
, 0, &arg_default_start_limit_burst
},
687 { "Manager", "DefaultEnvironment", config_parse_environ
, 0, &arg_default_environment
},
688 { "Manager", "DefaultLimitCPU", config_parse_rlimit
, RLIMIT_CPU
, arg_default_rlimit
},
689 { "Manager", "DefaultLimitFSIZE", config_parse_rlimit
, RLIMIT_FSIZE
, arg_default_rlimit
},
690 { "Manager", "DefaultLimitDATA", config_parse_rlimit
, RLIMIT_DATA
, arg_default_rlimit
},
691 { "Manager", "DefaultLimitSTACK", config_parse_rlimit
, RLIMIT_STACK
, arg_default_rlimit
},
692 { "Manager", "DefaultLimitCORE", config_parse_rlimit
, RLIMIT_CORE
, arg_default_rlimit
},
693 { "Manager", "DefaultLimitRSS", config_parse_rlimit
, RLIMIT_RSS
, arg_default_rlimit
},
694 { "Manager", "DefaultLimitNOFILE", config_parse_rlimit
, RLIMIT_NOFILE
, arg_default_rlimit
},
695 { "Manager", "DefaultLimitAS", config_parse_rlimit
, RLIMIT_AS
, arg_default_rlimit
},
696 { "Manager", "DefaultLimitNPROC", config_parse_rlimit
, RLIMIT_NPROC
, arg_default_rlimit
},
697 { "Manager", "DefaultLimitMEMLOCK", config_parse_rlimit
, RLIMIT_MEMLOCK
, arg_default_rlimit
},
698 { "Manager", "DefaultLimitLOCKS", config_parse_rlimit
, RLIMIT_LOCKS
, arg_default_rlimit
},
699 { "Manager", "DefaultLimitSIGPENDING", config_parse_rlimit
, RLIMIT_SIGPENDING
, arg_default_rlimit
},
700 { "Manager", "DefaultLimitMSGQUEUE", config_parse_rlimit
, RLIMIT_MSGQUEUE
, arg_default_rlimit
},
701 { "Manager", "DefaultLimitNICE", config_parse_rlimit
, RLIMIT_NICE
, arg_default_rlimit
},
702 { "Manager", "DefaultLimitRTPRIO", config_parse_rlimit
, RLIMIT_RTPRIO
, arg_default_rlimit
},
703 { "Manager", "DefaultLimitRTTIME", config_parse_rlimit
, RLIMIT_RTTIME
, arg_default_rlimit
},
704 { "Manager", "DefaultCPUAccounting", config_parse_bool
, 0, &arg_default_cpu_accounting
},
705 { "Manager", "DefaultIOAccounting", config_parse_bool
, 0, &arg_default_io_accounting
},
706 { "Manager", "DefaultIPAccounting", config_parse_bool
, 0, &arg_default_ip_accounting
},
707 { "Manager", "DefaultBlockIOAccounting", config_parse_bool
, 0, &arg_default_blockio_accounting
},
708 { "Manager", "DefaultMemoryAccounting", config_parse_bool
, 0, &arg_default_memory_accounting
},
709 { "Manager", "DefaultTasksAccounting", config_parse_bool
, 0, &arg_default_tasks_accounting
},
710 { "Manager", "DefaultTasksMax", config_parse_tasks_max
, 0, &arg_default_tasks_max
},
711 { "Manager", "CtrlAltDelBurstAction", config_parse_emergency_action
, 0, &arg_cad_burst_action
},
715 const char *fn
, *conf_dirs_nulstr
;
718 PKGSYSCONFDIR
"/system.conf" :
719 PKGSYSCONFDIR
"/user.conf";
721 conf_dirs_nulstr
= arg_system
?
722 CONF_PATHS_NULSTR("systemd/system.conf.d") :
723 CONF_PATHS_NULSTR("systemd/user.conf.d");
725 (void) config_parse_many_nulstr(fn
, conf_dirs_nulstr
, "Manager\0", config_item_table_lookup
, items
, CONFIG_PARSE_WARN
, NULL
);
727 /* Traditionally "0" was used to turn off the default unit timeouts. Fix this up so that we used USEC_INFINITY
728 * like everywhere else. */
729 if (arg_default_timeout_start_usec
<= 0)
730 arg_default_timeout_start_usec
= USEC_INFINITY
;
731 if (arg_default_timeout_stop_usec
<= 0)
732 arg_default_timeout_stop_usec
= USEC_INFINITY
;
737 static void set_manager_defaults(Manager
*m
) {
741 /* Propagates the various default unit property settings into the manager object, i.e. properties that do not
742 * affect the manager itself, but are just what newly allocated units will have set if they haven't set
743 * anything else. (Also see set_manager_settings() for the settings that affect the manager's own behaviour) */
745 m
->default_timer_accuracy_usec
= arg_default_timer_accuracy_usec
;
746 m
->default_std_output
= arg_default_std_output
;
747 m
->default_std_error
= arg_default_std_error
;
748 m
->default_timeout_start_usec
= arg_default_timeout_start_usec
;
749 m
->default_timeout_stop_usec
= arg_default_timeout_stop_usec
;
750 m
->default_restart_usec
= arg_default_restart_usec
;
751 m
->default_start_limit_interval
= arg_default_start_limit_interval
;
752 m
->default_start_limit_burst
= arg_default_start_limit_burst
;
753 m
->default_cpu_accounting
= arg_default_cpu_accounting
;
754 m
->default_io_accounting
= arg_default_io_accounting
;
755 m
->default_ip_accounting
= arg_default_ip_accounting
;
756 m
->default_blockio_accounting
= arg_default_blockio_accounting
;
757 m
->default_memory_accounting
= arg_default_memory_accounting
;
758 m
->default_tasks_accounting
= arg_default_tasks_accounting
;
759 m
->default_tasks_max
= arg_default_tasks_max
;
761 manager_set_default_rlimits(m
, arg_default_rlimit
);
762 manager_environment_add(m
, NULL
, arg_default_environment
);
765 static void set_manager_settings(Manager
*m
) {
769 /* Propagates the various manager settings into the manager object, i.e. properties that effect the manager
770 * itself (as opposed to just being inherited into newly allocated units, see set_manager_defaults() above). */
772 m
->confirm_spawn
= arg_confirm_spawn
;
773 m
->service_watchdogs
= arg_service_watchdogs
;
774 m
->runtime_watchdog
= arg_runtime_watchdog
;
775 m
->shutdown_watchdog
= arg_shutdown_watchdog
;
776 m
->cad_burst_action
= arg_cad_burst_action
;
778 manager_set_show_status(m
, arg_show_status
);
781 static int parse_argv(int argc
, char *argv
[]) {
783 ARG_LOG_LEVEL
= 0x100,
793 ARG_DUMP_CONFIGURATION_ITEMS
,
794 ARG_DUMP_BUS_PROPERTIES
,
803 ARG_DEFAULT_STD_OUTPUT
,
804 ARG_DEFAULT_STD_ERROR
,
806 ARG_SERVICE_WATCHDOGS
,
809 static const struct option options
[] = {
810 { "log-level", required_argument
, NULL
, ARG_LOG_LEVEL
},
811 { "log-target", required_argument
, NULL
, ARG_LOG_TARGET
},
812 { "log-color", optional_argument
, NULL
, ARG_LOG_COLOR
},
813 { "log-location", optional_argument
, NULL
, ARG_LOG_LOCATION
},
814 { "unit", required_argument
, NULL
, ARG_UNIT
},
815 { "system", no_argument
, NULL
, ARG_SYSTEM
},
816 { "user", no_argument
, NULL
, ARG_USER
},
817 { "test", no_argument
, NULL
, ARG_TEST
},
818 { "no-pager", no_argument
, NULL
, ARG_NO_PAGER
},
819 { "help", no_argument
, NULL
, 'h' },
820 { "version", no_argument
, NULL
, ARG_VERSION
},
821 { "dump-configuration-items", no_argument
, NULL
, ARG_DUMP_CONFIGURATION_ITEMS
},
822 { "dump-bus-properties", no_argument
, NULL
, ARG_DUMP_BUS_PROPERTIES
},
823 { "dump-core", optional_argument
, NULL
, ARG_DUMP_CORE
},
824 { "crash-chvt", required_argument
, NULL
, ARG_CRASH_CHVT
},
825 { "crash-shell", optional_argument
, NULL
, ARG_CRASH_SHELL
},
826 { "crash-reboot", optional_argument
, NULL
, ARG_CRASH_REBOOT
},
827 { "confirm-spawn", optional_argument
, NULL
, ARG_CONFIRM_SPAWN
},
828 { "show-status", optional_argument
, NULL
, ARG_SHOW_STATUS
},
829 { "deserialize", required_argument
, NULL
, ARG_DESERIALIZE
},
830 { "switched-root", no_argument
, NULL
, ARG_SWITCHED_ROOT
},
831 { "default-standard-output", required_argument
, NULL
, ARG_DEFAULT_STD_OUTPUT
, },
832 { "default-standard-error", required_argument
, NULL
, ARG_DEFAULT_STD_ERROR
, },
833 { "machine-id", required_argument
, NULL
, ARG_MACHINE_ID
},
834 { "service-watchdogs", required_argument
, NULL
, ARG_SERVICE_WATCHDOGS
},
843 if (getpid_cached() == 1)
846 while ((c
= getopt_long(argc
, argv
, "hDbsz:", options
, NULL
)) >= 0)
851 r
= log_set_max_level_from_string(optarg
);
853 return log_error_errno(r
, "Failed to parse log level \"%s\": %m", optarg
);
858 r
= log_set_target_from_string(optarg
);
860 return log_error_errno(r
, "Failed to parse log target \"%s\": %m", optarg
);
867 r
= log_show_color_from_string(optarg
);
869 return log_error_errno(r
, "Failed to parse log color setting \"%s\": %m",
872 log_show_color(true);
876 case ARG_LOG_LOCATION
:
878 r
= log_show_location_from_string(optarg
);
880 return log_error_errno(r
, "Failed to parse log location setting \"%s\": %m",
883 log_show_location(true);
887 case ARG_DEFAULT_STD_OUTPUT
:
888 r
= exec_output_from_string(optarg
);
890 return log_error_errno(r
, "Failed to parse default standard output setting \"%s\": %m",
892 arg_default_std_output
= r
;
895 case ARG_DEFAULT_STD_ERROR
:
896 r
= exec_output_from_string(optarg
);
898 return log_error_errno(r
, "Failed to parse default standard error output setting \"%s\": %m",
900 arg_default_std_error
= r
;
904 r
= free_and_strdup(&arg_default_unit
, optarg
);
906 return log_error_errno(r
, "Failed to set default unit \"%s\": %m", optarg
);
919 arg_action
= ACTION_TEST
;
927 arg_action
= ACTION_VERSION
;
930 case ARG_DUMP_CONFIGURATION_ITEMS
:
931 arg_action
= ACTION_DUMP_CONFIGURATION_ITEMS
;
934 case ARG_DUMP_BUS_PROPERTIES
:
935 arg_action
= ACTION_DUMP_BUS_PROPERTIES
;
940 arg_dump_core
= true;
942 r
= parse_boolean(optarg
);
944 return log_error_errno(r
, "Failed to parse dump core boolean: \"%s\": %m",
951 r
= parse_crash_chvt(optarg
);
953 return log_error_errno(r
, "Failed to parse crash virtual terminal index: \"%s\": %m",
957 case ARG_CRASH_SHELL
:
959 arg_crash_shell
= true;
961 r
= parse_boolean(optarg
);
963 return log_error_errno(r
, "Failed to parse crash shell boolean: \"%s\": %m",
969 case ARG_CRASH_REBOOT
:
971 arg_crash_reboot
= true;
973 r
= parse_boolean(optarg
);
975 return log_error_errno(r
, "Failed to parse crash shell boolean: \"%s\": %m",
977 arg_crash_reboot
= r
;
981 case ARG_CONFIRM_SPAWN
:
982 arg_confirm_spawn
= mfree(arg_confirm_spawn
);
984 r
= parse_confirm_spawn(optarg
, &arg_confirm_spawn
);
986 return log_error_errno(r
, "Failed to parse confirm spawn option: \"%s\": %m",
990 case ARG_SERVICE_WATCHDOGS
:
991 r
= parse_boolean(optarg
);
993 return log_error_errno(r
, "Failed to parse service watchdogs boolean: \"%s\": %m",
995 arg_service_watchdogs
= r
;
998 case ARG_SHOW_STATUS
:
1000 r
= parse_show_status(optarg
, &arg_show_status
);
1002 return log_error_errno(r
, "Failed to parse show status boolean: \"%s\": %m",
1005 arg_show_status
= SHOW_STATUS_YES
;
1008 case ARG_DESERIALIZE
: {
1012 r
= safe_atoi(optarg
, &fd
);
1014 log_error_errno(r
, "Failed to parse deserialize option \"%s\": %m", optarg
);
1016 log_error("Invalid deserialize fd: %d", fd
);
1020 (void) fd_cloexec(fd
, true);
1022 f
= fdopen(fd
, "r");
1024 return log_error_errno(errno
, "Failed to open serialization fd %d: %m", fd
);
1026 safe_fclose(arg_serialization
);
1027 arg_serialization
= f
;
1032 case ARG_SWITCHED_ROOT
:
1033 arg_switched_root
= true;
1036 case ARG_MACHINE_ID
:
1037 r
= set_machine_id(optarg
);
1039 return log_error_errno(r
, "MachineID '%s' is not valid: %m", optarg
);
1043 arg_action
= ACTION_HELP
;
1047 log_set_max_level(LOG_DEBUG
);
1053 /* Just to eat away the sysvinit kernel
1054 * cmdline args without getopt() error
1055 * messages that we'll parse in
1056 * parse_proc_cmdline_word() or ignore. */
1059 if (getpid_cached() != 1)
1065 assert_not_reached("Unhandled option code.");
1068 if (optind
< argc
&& getpid_cached() != 1) {
1069 /* Hmm, when we aren't run as init system
1070 * let's complain about excess arguments */
1072 log_error("Excess arguments.");
1079 static int help(void) {
1080 _cleanup_free_
char *link
= NULL
;
1083 r
= terminal_urlify_man("systemd", "1", &link
);
1087 printf("%s [OPTIONS...]\n\n"
1088 "Starts up and maintains the system or user services.\n\n"
1089 " -h --help Show this help\n"
1090 " --version Show version\n"
1091 " --test Determine startup sequence, dump it and exit\n"
1092 " --no-pager Do not pipe output into a pager\n"
1093 " --dump-configuration-items Dump understood unit configuration items\n"
1094 " --dump-bus-properties Dump exposed bus properties\n"
1095 " --unit=UNIT Set default unit\n"
1096 " --system Run a system instance, even if PID != 1\n"
1097 " --user Run a user instance\n"
1098 " --dump-core[=BOOL] Dump core on crash\n"
1099 " --crash-vt=NR Change to specified VT on crash\n"
1100 " --crash-reboot[=BOOL] Reboot on crash\n"
1101 " --crash-shell[=BOOL] Run shell on crash\n"
1102 " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n"
1103 " --show-status[=BOOL] Show status updates on the console during bootup\n"
1104 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
1105 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1106 " --log-color[=BOOL] Highlight important log messages\n"
1107 " --log-location[=BOOL] Include code location in log messages\n"
1108 " --default-standard-output= Set default standard output for services\n"
1109 " --default-standard-error= Set default standard error output for services\n"
1110 "\nSee the %s for details.\n"
1111 , program_invocation_short_name
1118 static int prepare_reexecute(Manager
*m
, FILE **_f
, FDSet
**_fds
, bool switching_root
) {
1119 _cleanup_fdset_free_ FDSet
*fds
= NULL
;
1120 _cleanup_fclose_
FILE *f
= NULL
;
1127 r
= manager_open_serialization(m
, &f
);
1129 return log_error_errno(r
, "Failed to create serialization file: %m");
1131 /* Make sure nothing is really destructed when we shut down */
1133 bus_manager_send_reloading(m
, true);
1139 r
= manager_serialize(m
, f
, fds
, switching_root
);
1141 return log_error_errno(r
, "Failed to serialize state: %m");
1143 if (fseeko(f
, 0, SEEK_SET
) == (off_t
) -1)
1144 return log_error_errno(errno
, "Failed to rewind serialization fd: %m");
1146 r
= fd_cloexec(fileno(f
), false);
1148 return log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization: %m");
1150 r
= fdset_cloexec(fds
, false);
1152 return log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization fds: %m");
1155 *_fds
= TAKE_PTR(fds
);
1160 static int bump_rlimit_nofile(struct rlimit
*saved_rlimit
) {
1163 assert(saved_rlimit
);
1165 /* Save the original RLIMIT_NOFILE so that we can reset it
1166 * later when transitioning from the initrd to the main
1167 * systemd or suchlike. */
1168 if (getrlimit(RLIMIT_NOFILE
, saved_rlimit
) < 0)
1169 return log_warning_errno(errno
, "Reading RLIMIT_NOFILE failed, ignoring: %m");
1171 /* Make sure forked processes get the default kernel setting */
1172 if (!arg_default_rlimit
[RLIMIT_NOFILE
]) {
1175 rl
= newdup(struct rlimit
, saved_rlimit
, 1);
1179 arg_default_rlimit
[RLIMIT_NOFILE
] = rl
;
1182 /* Bump up the resource limit for ourselves substantially, all the way to the maximum the kernel allows */
1183 nr
= read_nr_open();
1184 r
= setrlimit_closest(RLIMIT_NOFILE
, &RLIMIT_MAKE_CONST(nr
));
1186 return log_warning_errno(r
, "Setting RLIMIT_NOFILE failed, ignoring: %m");
1191 static int bump_rlimit_memlock(struct rlimit
*saved_rlimit
) {
1194 assert(saved_rlimit
);
1195 assert(getuid() == 0);
1197 /* BPF_MAP_TYPE_LPM_TRIE bpf maps are charged against RLIMIT_MEMLOCK, even though we have CAP_IPC_LOCK which
1198 * should normally disable such checks. We need them to implement IPAccessAllow= and IPAccessDeny=, hence let's
1199 * bump the value high enough for the root user. */
1201 if (getrlimit(RLIMIT_MEMLOCK
, saved_rlimit
) < 0)
1202 return log_warning_errno(errno
, "Reading RLIMIT_MEMLOCK failed, ignoring: %m");
1204 r
= setrlimit_closest(RLIMIT_MEMLOCK
, &RLIMIT_MAKE_CONST(1024ULL*1024ULL*16ULL));
1206 return log_warning_errno(r
, "Setting RLIMIT_MEMLOCK failed, ignoring: %m");
1211 static void test_usr(void) {
1213 /* Check that /usr is not a separate fs */
1215 if (dir_is_empty("/usr") <= 0)
1218 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1219 "Some things will probably break (sometimes even silently) in mysterious ways. "
1220 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1223 static int enforce_syscall_archs(Set
*archs
) {
1227 if (!is_seccomp_available())
1230 r
= seccomp_restrict_archs(arg_syscall_archs
);
1232 return log_error_errno(r
, "Failed to enforce system call architecture restrication: %m");
1237 static int status_welcome(void) {
1238 _cleanup_free_
char *pretty_name
= NULL
, *ansi_color
= NULL
;
1241 if (IN_SET(arg_show_status
, SHOW_STATUS_NO
, SHOW_STATUS_AUTO
))
1244 r
= parse_os_release(NULL
,
1245 "PRETTY_NAME", &pretty_name
,
1246 "ANSI_COLOR", &ansi_color
,
1249 log_full_errno(r
== -ENOENT
? LOG_DEBUG
: LOG_WARNING
, r
,
1250 "Failed to read os-release file, ignoring: %m");
1252 if (log_get_show_color())
1253 return status_printf(NULL
, false, false,
1254 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1255 isempty(ansi_color
) ? "1" : ansi_color
,
1256 isempty(pretty_name
) ? "Linux" : pretty_name
);
1258 return status_printf(NULL
, false, false,
1259 "\nWelcome to %s!\n",
1260 isempty(pretty_name
) ? "Linux" : pretty_name
);
1263 static int write_container_id(void) {
1267 c
= getenv("container");
1271 RUN_WITH_UMASK(0022)
1272 r
= write_string_file("/run/systemd/container", c
, WRITE_STRING_FILE_CREATE
);
1274 return log_warning_errno(r
, "Failed to write /run/systemd/container, ignoring: %m");
1279 static int bump_unix_max_dgram_qlen(void) {
1280 _cleanup_free_
char *qlen
= NULL
;
1284 /* Let's bump the net.unix.max_dgram_qlen sysctl. The kernel default of 16 is simply too low. We set the value
1285 * really really early during boot, so that it is actually applied to all our sockets, including the
1286 * $NOTIFY_SOCKET one. */
1288 r
= read_one_line_file("/proc/sys/net/unix/max_dgram_qlen", &qlen
);
1290 return log_warning_errno(r
, "Failed to read AF_UNIX datagram queue length, ignoring: %m");
1292 r
= safe_atolu(qlen
, &v
);
1294 return log_warning_errno(r
, "Failed to parse AF_UNIX datagram queue length '%s', ignoring: %m", qlen
);
1296 if (v
>= DEFAULT_UNIX_MAX_DGRAM_QLEN
)
1299 r
= write_string_filef("/proc/sys/net/unix/max_dgram_qlen", 0, "%lu", DEFAULT_UNIX_MAX_DGRAM_QLEN
);
1301 return log_full_errno(IN_SET(r
, -EROFS
, -EPERM
, -EACCES
) ? LOG_DEBUG
: LOG_WARNING
, r
,
1302 "Failed to bump AF_UNIX datagram queue length, ignoring: %m");
1307 static int fixup_environment(void) {
1308 _cleanup_free_
char *term
= NULL
;
1312 /* Only fix up the environment when we are started as PID 1 */
1313 if (getpid_cached() != 1)
1316 /* We expect the environment to be set correctly if run inside a container. */
1317 if (detect_container() > 0)
1320 /* When started as PID1, the kernel uses /dev/console for our stdios and uses TERM=linux whatever the backend
1321 * device used by the console. We try to make a better guess here since some consoles might not have support
1322 * for color mode for example.
1324 * However if TERM was configured through the kernel command line then leave it alone. */
1325 r
= proc_cmdline_get_key("TERM", 0, &term
);
1329 t
= term
?: default_term_for_tty("/dev/console");
1331 if (setenv("TERM", t
, 1) < 0)
1337 static void redirect_telinit(int argc
, char *argv
[]) {
1339 /* This is compatibility support for SysV, where calling init as a user is identical to telinit. */
1341 #if HAVE_SYSV_COMPAT
1342 if (getpid_cached() == 1)
1345 if (!strstr(program_invocation_short_name
, "init"))
1348 execv(SYSTEMCTL_BINARY_PATH
, argv
);
1349 log_error_errno(errno
, "Failed to exec " SYSTEMCTL_BINARY_PATH
": %m");
1354 static int become_shutdown(
1355 const char *shutdown_verb
,
1358 char log_level
[DECIMAL_STR_MAX(int) + 1],
1359 exit_code
[DECIMAL_STR_MAX(uint8_t) + 1],
1360 timeout
[DECIMAL_STR_MAX(usec_t
) + 1];
1362 const char* command_line
[13] = {
1363 SYSTEMD_SHUTDOWN_BINARY_PATH
,
1365 "--timeout", timeout
,
1366 "--log-level", log_level
,
1370 _cleanup_strv_free_
char **env_block
= NULL
;
1374 assert(shutdown_verb
);
1375 assert(!command_line
[pos
]);
1376 env_block
= strv_copy(environ
);
1378 xsprintf(log_level
, "%d", log_get_max_level());
1379 xsprintf(timeout
, "%" PRI_USEC
"us", arg_default_timeout_stop_usec
);
1381 switch (log_get_target()) {
1383 case LOG_TARGET_KMSG
:
1384 case LOG_TARGET_JOURNAL_OR_KMSG
:
1385 case LOG_TARGET_SYSLOG_OR_KMSG
:
1386 command_line
[pos
++] = "kmsg";
1389 case LOG_TARGET_NULL
:
1390 command_line
[pos
++] = "null";
1393 case LOG_TARGET_CONSOLE
:
1395 command_line
[pos
++] = "console";
1399 if (log_get_show_color())
1400 command_line
[pos
++] = "--log-color";
1402 if (log_get_show_location())
1403 command_line
[pos
++] = "--log-location";
1405 if (streq(shutdown_verb
, "exit")) {
1406 command_line
[pos
++] = "--exit-code";
1407 command_line
[pos
++] = exit_code
;
1408 xsprintf(exit_code
, "%d", retval
);
1411 assert(pos
< ELEMENTSOF(command_line
));
1413 if (streq(shutdown_verb
, "reboot") &&
1414 arg_shutdown_watchdog
> 0 &&
1415 arg_shutdown_watchdog
!= USEC_INFINITY
) {
1419 /* If we reboot let's set the shutdown
1420 * watchdog and tell the shutdown binary to
1421 * repeatedly ping it */
1422 r
= watchdog_set_timeout(&arg_shutdown_watchdog
);
1423 watchdog_close(r
< 0);
1425 /* Tell the binary how often to ping, ignore failure */
1426 if (asprintf(&e
, "WATCHDOG_USEC="USEC_FMT
, arg_shutdown_watchdog
) > 0)
1427 (void) strv_consume(&env_block
, e
);
1429 if (arg_watchdog_device
&&
1430 asprintf(&e
, "WATCHDOG_DEVICE=%s", arg_watchdog_device
) > 0)
1431 (void) strv_consume(&env_block
, e
);
1433 watchdog_close(true);
1435 /* Avoid the creation of new processes forked by the
1436 * kernel; at this point, we will not listen to the
1438 if (detect_container() <= 0)
1439 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER
);
1441 execve(SYSTEMD_SHUTDOWN_BINARY_PATH
, (char **) command_line
, env_block
);
1445 static void initialize_clock(void) {
1448 if (clock_is_localtime(NULL
) > 0) {
1452 * The very first call of settimeofday() also does a time warp in the kernel.
1454 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on external tools to take care
1455 * of maintaining the RTC and do all adjustments. This matches the behavior of Windows, which leaves
1456 * the RTC alone if the registry tells that the RTC runs in UTC.
1458 r
= clock_set_timezone(&min
);
1460 log_error_errno(r
, "Failed to apply local time delta, ignoring: %m");
1462 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min
);
1464 } else if (!in_initrd()) {
1466 * Do a dummy very first call to seal the kernel's time warp magic.
1468 * Do not call this from inside the initrd. The initrd might not carry /etc/adjtime with LOCAL, but the
1469 * real system could be set up that way. In such case, we need to delay the time-warp or the sealing
1470 * until we reach the real system.
1472 * Do no set the kernel's timezone. The concept of local time cannot be supported reliably, the time
1473 * will jump or be incorrect at every daylight saving time change. All kernel local time concepts will
1474 * be treated as UTC that way.
1476 (void) clock_reset_timewarp();
1479 r
= clock_apply_epoch();
1481 log_error_errno(r
, "Current system time is before build time, but cannot correct: %m");
1483 log_info("System time before build time, advancing clock.");
1486 static void initialize_coredump(bool skip_setup
) {
1488 if (getpid_cached() != 1)
1491 /* Don't limit the core dump size, so that coredump handlers such as systemd-coredump (which honour the limit)
1492 * will process core dumps for system services by default. */
1493 if (setrlimit(RLIMIT_CORE
, &RLIMIT_MAKE_CONST(RLIM_INFINITY
)) < 0)
1494 log_warning_errno(errno
, "Failed to set RLIMIT_CORE: %m");
1496 /* But at the same time, turn off the core_pattern logic by default, so that no
1497 * coredumps are stored until the systemd-coredump tool is enabled via
1498 * sysctl. However it can be changed via the kernel command line later so core
1499 * dumps can still be generated during early startup and in initramfs. */
1501 disable_coredumps();
1505 static void initialize_core_pattern(bool skip_setup
) {
1508 if (skip_setup
|| !arg_early_core_pattern
)
1511 if (getpid_cached() != 1)
1514 r
= write_string_file("/proc/sys/kernel/core_pattern", arg_early_core_pattern
, 0);
1516 log_warning_errno(r
, "Failed to write '%s' to /proc/sys/kernel/core_pattern, ignoring: %m", arg_early_core_pattern
);
1519 static void do_reexecute(
1522 const struct rlimit
*saved_rlimit_nofile
,
1523 const struct rlimit
*saved_rlimit_memlock
,
1525 const char *switch_root_dir
,
1526 const char *switch_root_init
,
1527 const char **ret_error_message
) {
1529 unsigned i
, j
, args_size
;
1533 assert(saved_rlimit_nofile
);
1534 assert(saved_rlimit_memlock
);
1535 assert(ret_error_message
);
1537 /* Close and disarm the watchdog, so that the new instance can reinitialize it, but doesn't get rebooted while
1539 watchdog_close(true);
1541 /* Reset the RLIMIT_NOFILE to the kernel default, so that the new systemd can pass the kernel default to its
1542 * child processes */
1544 if (saved_rlimit_nofile
->rlim_cur
> 0)
1545 (void) setrlimit(RLIMIT_NOFILE
, saved_rlimit_nofile
);
1546 if (saved_rlimit_memlock
->rlim_cur
!= (rlim_t
) -1)
1547 (void) setrlimit(RLIMIT_MEMLOCK
, saved_rlimit_memlock
);
1549 if (switch_root_dir
) {
1550 /* Kill all remaining processes from the initrd, but don't wait for them, so that we can handle the
1551 * SIGCHLD for them after deserializing. */
1552 broadcast_signal(SIGTERM
, false, true, arg_default_timeout_stop_usec
);
1554 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1555 r
= switch_root(switch_root_dir
, "/mnt", true, MS_MOVE
);
1557 log_error_errno(r
, "Failed to switch root, trying to continue: %m");
1560 args_size
= MAX(6, argc
+1);
1561 args
= newa(const char*, args_size
);
1563 if (!switch_root_init
) {
1564 char sfd
[DECIMAL_STR_MAX(int) + 1];
1566 /* First try to spawn ourselves with the right path, and with full serialization. We do this only if
1567 * the user didn't specify an explicit init to spawn. */
1569 assert(arg_serialization
);
1572 xsprintf(sfd
, "%i", fileno(arg_serialization
));
1575 args
[i
++] = SYSTEMD_BINARY_PATH
;
1576 if (switch_root_dir
)
1577 args
[i
++] = "--switched-root";
1578 args
[i
++] = arg_system
? "--system" : "--user";
1579 args
[i
++] = "--deserialize";
1583 assert(i
<= args_size
);
1586 * We want valgrind to print its memory usage summary before reexecution. Valgrind won't do this is on
1587 * its own on exec(), but it will do it on exit(). Hence, to ensure we get a summary here, fork() off
1588 * a child, let it exit() cleanly, so that it prints the summary, and wait() for it in the parent,
1589 * before proceeding into the exec().
1591 valgrind_summary_hack();
1593 (void) execv(args
[0], (char* const*) args
);
1594 log_debug_errno(errno
, "Failed to execute our own binary, trying fallback: %m");
1597 /* Try the fallback, if there is any, without any serialization. We pass the original argv[] and envp[]. (Well,
1598 * modulo the ordering changes due to getopt() in argv[], and some cleanups in envp[], but let's hope that
1599 * doesn't matter.) */
1601 arg_serialization
= safe_fclose(arg_serialization
);
1602 fds
= fdset_free(fds
);
1604 /* Reopen the console */
1605 (void) make_console_stdio();
1607 for (j
= 1, i
= 1; j
< (unsigned) argc
; j
++)
1608 args
[i
++] = argv
[j
];
1610 assert(i
<= args_size
);
1612 /* Reenable any blocked signals, especially important if we switch from initial ramdisk to init=... */
1613 (void) reset_all_signal_handlers();
1614 (void) reset_signal_mask();
1616 if (switch_root_init
) {
1617 args
[0] = switch_root_init
;
1618 (void) execv(args
[0], (char* const*) args
);
1619 log_warning_errno(errno
, "Failed to execute configured init, trying fallback: %m");
1622 args
[0] = "/sbin/init";
1623 (void) execv(args
[0], (char* const*) args
);
1626 manager_status_printf(NULL
, STATUS_TYPE_EMERGENCY
,
1627 ANSI_HIGHLIGHT_RED
" !! " ANSI_NORMAL
,
1628 "Failed to execute /sbin/init");
1631 log_warning("No /sbin/init, trying fallback");
1633 args
[0] = "/bin/sh";
1635 (void) execv(args
[0], (char* const*) args
);
1636 log_error_errno(errno
, "Failed to execute /bin/sh, giving up: %m");
1638 log_warning_errno(r
, "Failed to execute /sbin/init, giving up: %m");
1640 *ret_error_message
= "Failed to execute fallback shell";
1643 static int invoke_main_loop(
1645 bool *ret_reexecute
,
1646 int *ret_retval
, /* Return parameters relevant for shutting down */
1647 const char **ret_shutdown_verb
, /* … */
1648 FDSet
**ret_fds
, /* Return parameters for reexecuting */
1649 char **ret_switch_root_dir
, /* … */
1650 char **ret_switch_root_init
, /* … */
1651 const char **ret_error_message
) {
1656 assert(ret_reexecute
);
1658 assert(ret_shutdown_verb
);
1660 assert(ret_switch_root_dir
);
1661 assert(ret_switch_root_init
);
1662 assert(ret_error_message
);
1665 r
= manager_loop(m
);
1667 *ret_error_message
= "Failed to run main loop";
1668 return log_emergency_errno(r
, "Failed to run main loop: %m");
1671 switch (m
->exit_code
) {
1673 case MANAGER_RELOAD
: {
1674 LogTarget saved_log_target
;
1675 int saved_log_level
;
1677 log_info("Reloading.");
1679 /* First, save any overridden log level/target, then parse the configuration file, which might
1680 * change the log level to new settings. */
1682 saved_log_level
= m
->log_level_overridden
? log_get_max_level() : -1;
1683 saved_log_target
= m
->log_target_overridden
? log_get_target() : _LOG_TARGET_INVALID
;
1685 r
= parse_config_file();
1687 log_warning_errno(r
, "Failed to parse config file, ignoring: %m");
1689 set_manager_defaults(m
);
1691 if (saved_log_level
>= 0)
1692 manager_override_log_level(m
, saved_log_level
);
1693 if (saved_log_target
>= 0)
1694 manager_override_log_target(m
, saved_log_target
);
1696 r
= manager_reload(m
);
1698 log_warning_errno(r
, "Failed to reload, ignoring: %m");
1703 case MANAGER_REEXECUTE
:
1705 r
= prepare_reexecute(m
, &arg_serialization
, ret_fds
, false);
1707 *ret_error_message
= "Failed to prepare for reexecution";
1711 log_notice("Reexecuting.");
1713 *ret_reexecute
= true;
1714 *ret_retval
= EXIT_SUCCESS
;
1715 *ret_shutdown_verb
= NULL
;
1716 *ret_switch_root_dir
= *ret_switch_root_init
= NULL
;
1720 case MANAGER_SWITCH_ROOT
:
1721 if (!m
->switch_root_init
) {
1722 r
= prepare_reexecute(m
, &arg_serialization
, ret_fds
, true);
1724 *ret_error_message
= "Failed to prepare for reexecution";
1730 log_notice("Switching root.");
1732 *ret_reexecute
= true;
1733 *ret_retval
= EXIT_SUCCESS
;
1734 *ret_shutdown_verb
= NULL
;
1736 /* Steal the switch root parameters */
1737 *ret_switch_root_dir
= m
->switch_root
;
1738 *ret_switch_root_init
= m
->switch_root_init
;
1739 m
->switch_root
= m
->switch_root_init
= NULL
;
1745 if (MANAGER_IS_USER(m
)) {
1748 *ret_reexecute
= false;
1749 *ret_retval
= m
->return_value
;
1750 *ret_shutdown_verb
= NULL
;
1752 *ret_switch_root_dir
= *ret_switch_root_init
= NULL
;
1758 case MANAGER_REBOOT
:
1759 case MANAGER_POWEROFF
:
1761 case MANAGER_KEXEC
: {
1762 static const char * const table
[_MANAGER_EXIT_CODE_MAX
] = {
1763 [MANAGER_EXIT
] = "exit",
1764 [MANAGER_REBOOT
] = "reboot",
1765 [MANAGER_POWEROFF
] = "poweroff",
1766 [MANAGER_HALT
] = "halt",
1767 [MANAGER_KEXEC
] = "kexec"
1770 log_notice("Shutting down.");
1772 *ret_reexecute
= false;
1773 *ret_retval
= m
->return_value
;
1774 assert_se(*ret_shutdown_verb
= table
[m
->exit_code
]);
1776 *ret_switch_root_dir
= *ret_switch_root_init
= NULL
;
1782 assert_not_reached("Unknown exit code.");
1787 static void log_execution_mode(bool *ret_first_boot
) {
1788 assert(ret_first_boot
);
1793 log_info(PACKAGE_STRING
" running in %ssystem mode. (" SYSTEMD_FEATURES
")",
1794 arg_action
== ACTION_TEST
? "test " : "" );
1796 v
= detect_virtualization();
1798 log_info("Detected virtualization %s.", virtualization_to_string(v
));
1800 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1803 *ret_first_boot
= false;
1804 log_info("Running in initial RAM disk.");
1806 /* Let's check whether we are in first boot, i.e. whether /etc is still unpopulated. We use
1807 * /etc/machine-id as flag file, for this: if it exists we assume /etc is populated, if it
1808 * doesn't it's unpopulated. This allows container managers and installers to provision a
1809 * couple of files already. If the container manager wants to provision the machine ID itself
1810 * it should pass $container_uuid to PID 1. */
1812 *ret_first_boot
= access("/etc/machine-id", F_OK
) < 0;
1813 if (*ret_first_boot
)
1814 log_info("Running with unpopulated /etc.");
1817 if (DEBUG_LOGGING
) {
1818 _cleanup_free_
char *t
;
1820 t
= uid_to_name(getuid());
1821 log_debug(PACKAGE_STRING
" running in %suser mode for user " UID_FMT
"/%s. (" SYSTEMD_FEATURES
")",
1822 arg_action
== ACTION_TEST
? " test" : "", getuid(), strna(t
));
1825 *ret_first_boot
= false;
1829 static int initialize_runtime(
1831 struct rlimit
*saved_rlimit_nofile
,
1832 struct rlimit
*saved_rlimit_memlock
,
1833 const char **ret_error_message
) {
1837 assert(ret_error_message
);
1839 /* Sets up various runtime parameters. Many of these initializations are conditionalized:
1841 * - Some only apply to --system instances
1842 * - Some only apply to --user instances
1843 * - Some only apply when we first start up, but not when we reexecute
1846 if (arg_action
!= ACTION_RUN
)
1850 /* Make sure we leave a core dump without panicing the kernel. */
1851 install_crash_handler();
1854 r
= mount_cgroup_controllers(arg_join_controllers
);
1856 *ret_error_message
= "Failed to mount cgroup hierarchies";
1862 machine_id_setup(NULL
, arg_machine_id
, NULL
);
1864 bump_unix_max_dgram_qlen();
1866 write_container_id();
1869 if (arg_watchdog_device
) {
1870 r
= watchdog_set_device(arg_watchdog_device
);
1872 log_warning_errno(r
, "Failed to set watchdog device to %s, ignoring: %m", arg_watchdog_device
);
1875 if (arg_runtime_watchdog
> 0 && arg_runtime_watchdog
!= USEC_INFINITY
)
1876 watchdog_set_timeout(&arg_runtime_watchdog
);
1879 if (arg_timer_slack_nsec
!= NSEC_INFINITY
)
1880 if (prctl(PR_SET_TIMERSLACK
, arg_timer_slack_nsec
) < 0)
1881 log_warning_errno(errno
, "Failed to adjust timer slack, ignoring: %m");
1883 if (arg_system
&& !cap_test_all(arg_capability_bounding_set
)) {
1884 r
= capability_bounding_set_drop_usermode(arg_capability_bounding_set
);
1886 *ret_error_message
= "Failed to drop capability bounding set of usermode helpers";
1887 return log_emergency_errno(r
, "Failed to drop capability bounding set of usermode helpers: %m");
1890 r
= capability_bounding_set_drop(arg_capability_bounding_set
, true);
1892 *ret_error_message
= "Failed to drop capability bounding set";
1893 return log_emergency_errno(r
, "Failed to drop capability bounding set: %m");
1897 if (arg_system
&& arg_no_new_privs
) {
1898 if (prctl(PR_SET_NO_NEW_PRIVS
, 1, 0, 0, 0) < 0) {
1899 *ret_error_message
= "Failed to disable new privileges";
1900 return log_emergency_errno(errno
, "Failed to disable new privileges: %m");
1904 if (arg_syscall_archs
) {
1905 r
= enforce_syscall_archs(arg_syscall_archs
);
1907 *ret_error_message
= "Failed to set syscall architectures";
1913 /* Become reaper of our children */
1914 if (prctl(PR_SET_CHILD_SUBREAPER
, 1) < 0)
1915 log_warning_errno(errno
, "Failed to make us a subreaper: %m");
1918 /* Bump up RLIMIT_NOFILE for systemd itself */
1919 (void) bump_rlimit_nofile(saved_rlimit_nofile
);
1920 (void) bump_rlimit_memlock(saved_rlimit_memlock
);
1926 static int do_queue_default_job(
1928 const char **ret_error_message
) {
1930 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1931 Job
*default_unit_job
;
1932 Unit
*target
= NULL
;
1935 log_debug("Activating default unit: %s", arg_default_unit
);
1937 r
= manager_load_startable_unit_or_warn(m
, arg_default_unit
, NULL
, &target
);
1939 log_info("Falling back to rescue target: " SPECIAL_RESCUE_TARGET
);
1941 r
= manager_load_startable_unit_or_warn(m
, SPECIAL_RESCUE_TARGET
, NULL
, &target
);
1943 *ret_error_message
= r
== -ERFKILL
? "Rescue target masked"
1944 : "Failed to load rescue target";
1949 assert(target
->load_state
== UNIT_LOADED
);
1951 r
= manager_add_job(m
, JOB_START
, target
, JOB_ISOLATE
, &error
, &default_unit_job
);
1953 log_debug_errno(r
, "Default target could not be isolated, starting instead: %s", bus_error_message(&error
, r
));
1955 sd_bus_error_free(&error
);
1957 r
= manager_add_job(m
, JOB_START
, target
, JOB_REPLACE
, &error
, &default_unit_job
);
1959 *ret_error_message
= "Failed to start default target";
1960 return log_emergency_errno(r
, "Failed to start default target: %s", bus_error_message(&error
, r
));
1964 *ret_error_message
= "Failed to isolate default target";
1965 return log_emergency_errno(r
, "Failed to isolate default target: %s", bus_error_message(&error
, r
));
1968 m
->default_unit_job_id
= default_unit_job
->id
;
1973 static void free_arguments(void) {
1975 /* Frees all arg_* variables, with the exception of arg_serialization */
1976 rlimit_free_all(arg_default_rlimit
);
1978 arg_default_unit
= mfree(arg_default_unit
);
1979 arg_confirm_spawn
= mfree(arg_confirm_spawn
);
1980 arg_join_controllers
= strv_free_free(arg_join_controllers
);
1981 arg_default_environment
= strv_free(arg_default_environment
);
1982 arg_syscall_archs
= set_free(arg_syscall_archs
);
1985 static int load_configuration(int argc
, char **argv
, const char **ret_error_message
) {
1988 assert(ret_error_message
);
1990 arg_default_tasks_max
= system_tasks_max_scale(DEFAULT_TASKS_MAX_PERCENTAGE
, 100U);
1992 r
= parse_config_file();
1994 *ret_error_message
= "Failed to parse config file";
1999 r
= proc_cmdline_parse(parse_proc_cmdline_item
, NULL
, 0);
2001 log_warning_errno(r
, "Failed to parse kernel command line, ignoring: %m");
2004 /* Note that this also parses bits from the kernel command line, including "debug". */
2005 log_parse_environment();
2007 r
= parse_argv(argc
, argv
);
2009 *ret_error_message
= "Failed to parse commandline arguments";
2013 /* Initialize default unit */
2014 if (!arg_default_unit
) {
2015 arg_default_unit
= strdup(SPECIAL_DEFAULT_TARGET
);
2016 if (!arg_default_unit
) {
2017 *ret_error_message
= "Failed to set default unit";
2022 /* Initialize the show status setting if it hasn't been set explicitly yet */
2023 if (arg_show_status
== _SHOW_STATUS_INVALID
)
2024 arg_show_status
= SHOW_STATUS_YES
;
2029 static int safety_checks(void) {
2031 if (getpid_cached() == 1 &&
2032 arg_action
!= ACTION_RUN
) {
2033 log_error("Unsupported execution mode while PID 1.");
2037 if (getpid_cached() == 1 &&
2039 log_error("Can't run --user mode as PID 1.");
2043 if (arg_action
== ACTION_RUN
&&
2045 getpid_cached() != 1) {
2046 log_error("Can't run system mode unless PID 1.");
2050 if (arg_action
== ACTION_TEST
&&
2052 log_error("Don't run test mode as root.");
2057 arg_action
== ACTION_RUN
&&
2059 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
2064 arg_action
== ACTION_RUN
&&
2065 !getenv("XDG_RUNTIME_DIR")) {
2066 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
2071 arg_action
== ACTION_RUN
&&
2072 running_in_chroot() > 0) {
2073 log_error("Cannot be run in a chroot() environment.");
2080 static int initialize_security(
2081 bool *loaded_policy
,
2082 dual_timestamp
*security_start_timestamp
,
2083 dual_timestamp
*security_finish_timestamp
,
2084 const char **ret_error_message
) {
2088 assert(loaded_policy
);
2089 assert(security_start_timestamp
);
2090 assert(security_finish_timestamp
);
2091 assert(ret_error_message
);
2093 dual_timestamp_get(security_start_timestamp
);
2095 r
= mac_selinux_setup(loaded_policy
);
2097 *ret_error_message
= "Failed to load SELinux policy";
2101 r
= mac_smack_setup(loaded_policy
);
2103 *ret_error_message
= "Failed to load SMACK policy";
2109 *ret_error_message
= "Failed to load IMA policy";
2113 dual_timestamp_get(security_finish_timestamp
);
2117 static void test_summary(Manager
*m
) {
2120 printf("-> By units:\n");
2121 manager_dump_units(m
, stdout
, "\t");
2123 printf("-> By jobs:\n");
2124 manager_dump_jobs(m
, stdout
, "\t");
2127 static int collect_fds(FDSet
**ret_fds
, const char **ret_error_message
) {
2131 assert(ret_error_message
);
2133 r
= fdset_new_fill(ret_fds
);
2135 *ret_error_message
= "Failed to allocate fd set";
2136 return log_emergency_errno(r
, "Failed to allocate fd set: %m");
2139 fdset_cloexec(*ret_fds
, true);
2141 if (arg_serialization
)
2142 assert_se(fdset_remove(*ret_fds
, fileno(arg_serialization
)) >= 0);
2147 static void setup_console_terminal(bool skip_setup
) {
2152 /* Become a session leader if we aren't one yet. */
2155 /* If we are init, we connect stdin/stdout/stderr to /dev/null and make sure we don't have a controlling
2157 (void) release_terminal();
2159 /* Reset the console, but only if this is really init and we are freshly booted */
2160 if (getpid_cached() == 1 && !skip_setup
)
2161 (void) console_setup();
2164 static bool early_skip_setup_check(int argc
, char *argv
[]) {
2165 bool found_deserialize
= false;
2168 /* Determine if this is a reexecution or normal bootup. We do the full command line parsing much later, so
2169 * let's just have a quick peek here. Note that if we have switched root, do all the special setup things
2170 * anyway, even if in that case we also do deserialization. */
2172 for (i
= 1; i
< argc
; i
++) {
2173 if (streq(argv
[i
], "--switched-root"))
2174 return false; /* If we switched root, don't skip the setup. */
2175 else if (streq(argv
[i
], "--deserialize"))
2176 found_deserialize
= true;
2179 return found_deserialize
; /* When we are deserializing, then we are reexecuting, hence avoid the extensive setup */
2182 int main(int argc
, char *argv
[]) {
2184 dual_timestamp initrd_timestamp
= DUAL_TIMESTAMP_NULL
, userspace_timestamp
= DUAL_TIMESTAMP_NULL
, kernel_timestamp
= DUAL_TIMESTAMP_NULL
,
2185 security_start_timestamp
= DUAL_TIMESTAMP_NULL
, security_finish_timestamp
= DUAL_TIMESTAMP_NULL
;
2186 struct rlimit saved_rlimit_nofile
= RLIMIT_MAKE_CONST(0), saved_rlimit_memlock
= RLIMIT_MAKE_CONST((rlim_t
) -1);
2187 bool skip_setup
, loaded_policy
= false, queue_default_job
= false, first_boot
= false, reexecute
= false;
2188 char *switch_root_dir
= NULL
, *switch_root_init
= NULL
;
2189 usec_t before_startup
, after_startup
;
2190 static char systemd
[] = "systemd";
2191 char timespan
[FORMAT_TIMESPAN_MAX
];
2192 const char *shutdown_verb
= NULL
, *error_message
= NULL
;
2193 int r
, retval
= EXIT_FAILURE
;
2197 /* SysV compatibility: redirect init → telinit */
2198 redirect_telinit(argc
, argv
);
2200 /* Take timestamps early on */
2201 dual_timestamp_from_monotonic(&kernel_timestamp
, 0);
2202 dual_timestamp_get(&userspace_timestamp
);
2204 /* Figure out whether we need to do initialize the system, or if we already did that because we are
2206 skip_setup
= early_skip_setup_check(argc
, argv
);
2208 /* If we get started via the /sbin/init symlink then we are called 'init'. After a subsequent reexecution we
2209 * are then called 'systemd'. That is confusing, hence let's call us systemd right-away. */
2210 program_invocation_short_name
= systemd
;
2211 (void) prctl(PR_SET_NAME
, systemd
);
2213 /* Save the original command line */
2217 /* Make sure that if the user says "syslog" we actually log to the journal. */
2218 log_set_upgrade_syslog_to_journal(true);
2220 if (getpid_cached() == 1) {
2221 /* When we run as PID 1 force system mode */
2224 /* Disable the umask logic */
2227 /* Make sure that at least initially we do not ever log to journald/syslogd, because it might not be
2228 * activated yet (even though the log socket for it exists). */
2229 log_set_prohibit_ipc(true);
2231 /* Always reopen /dev/console when running as PID 1 or one of its pre-execve() children. This is
2232 * important so that we never end up logging to any foreign stderr, for example if we have to log in a
2233 * child process right before execve()'ing the actual binary, at a point in time where socket
2234 * activation stderr/stdout area already set up. */
2235 log_set_always_reopen_console(true);
2237 if (detect_container() <= 0) {
2239 /* Running outside of a container as PID 1 */
2240 log_set_target(LOG_TARGET_KMSG
);
2244 initrd_timestamp
= userspace_timestamp
;
2247 r
= mount_setup_early();
2249 error_message
= "Failed to mount early API filesystems";
2253 r
= initialize_security(
2255 &security_start_timestamp
,
2256 &security_finish_timestamp
,
2262 if (mac_selinux_init() < 0) {
2263 error_message
= "Failed to initialize SELinux policy";
2270 /* Set the default for later on, but don't actually open the logs like this for now. Note that
2271 * if we are transitioning from the initrd there might still be journal fd open, and we
2272 * shouldn't attempt opening that before we parsed /proc/cmdline which might redirect output
2274 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG
);
2277 /* Running inside a container, as PID 1 */
2278 log_set_target(LOG_TARGET_CONSOLE
);
2281 /* For later on, see above... */
2282 log_set_target(LOG_TARGET_JOURNAL
);
2284 /* clear the kernel timestamp,
2285 * because we are in a container */
2286 kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
2289 initialize_coredump(skip_setup
);
2291 r
= fixup_environment();
2293 log_emergency_errno(r
, "Failed to fix up PID 1 environment: %m");
2294 error_message
= "Failed to fix up PID1 environment";
2299 /* Running as user instance */
2301 log_set_target(LOG_TARGET_AUTO
);
2304 /* clear the kernel timestamp,
2305 * because we are not PID 1 */
2306 kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
2310 /* Try to figure out if we can use colors with the console. No need to do that for user instances since
2311 * they never log into the console. */
2312 log_show_color(colors_enabled());
2314 r
= make_null_stdio();
2316 log_warning_errno(r
, "Failed to redirect standard streams to /dev/null, ignoring: %m");
2319 /* Mount /proc, /sys and friends, so that /proc/cmdline and
2320 * /proc/$PID/fd is available. */
2321 if (getpid_cached() == 1) {
2323 /* Load the kernel modules early. */
2327 r
= mount_setup(loaded_policy
);
2329 error_message
= "Failed to mount API filesystems";
2334 /* Reset all signal handlers. */
2335 (void) reset_all_signal_handlers();
2336 (void) ignore_signals(SIGNALS_IGNORE
, -1);
2338 r
= load_configuration(argc
, argv
, &error_message
);
2342 r
= safety_checks();
2346 if (IN_SET(arg_action
, ACTION_TEST
, ACTION_HELP
, ACTION_DUMP_CONFIGURATION_ITEMS
, ACTION_DUMP_BUS_PROPERTIES
))
2347 (void) pager_open(arg_no_pager
, false);
2349 if (arg_action
!= ACTION_RUN
)
2352 if (arg_action
== ACTION_HELP
) {
2353 retval
= help() < 0 ? EXIT_FAILURE
: EXIT_SUCCESS
;
2355 } else if (arg_action
== ACTION_VERSION
) {
2358 } else if (arg_action
== ACTION_DUMP_CONFIGURATION_ITEMS
) {
2359 unit_dump_config_items(stdout
);
2360 retval
= EXIT_SUCCESS
;
2362 } else if (arg_action
== ACTION_DUMP_BUS_PROPERTIES
) {
2363 dump_bus_properties(stdout
);
2364 retval
= EXIT_SUCCESS
;
2368 assert_se(IN_SET(arg_action
, ACTION_RUN
, ACTION_TEST
));
2370 /* Move out of the way, so that we won't block unmounts */
2371 assert_se(chdir("/") == 0);
2373 if (arg_action
== ACTION_RUN
) {
2375 /* A core pattern might have been specified via the cmdline. */
2376 initialize_core_pattern(skip_setup
);
2378 /* Close logging fds, in order not to confuse collecting passed fds and terminal logic below */
2381 /* Remember open file descriptors for later deserialization */
2382 r
= collect_fds(&fds
, &error_message
);
2386 /* Give up any control of the console, but make sure its initialized. */
2387 setup_console_terminal(skip_setup
);
2389 /* Open the logging devices, if possible and necessary */
2393 log_execution_mode(&first_boot
);
2395 r
= initialize_runtime(skip_setup
,
2396 &saved_rlimit_nofile
,
2397 &saved_rlimit_memlock
,
2402 r
= manager_new(arg_system
? UNIT_FILE_SYSTEM
: UNIT_FILE_USER
,
2403 arg_action
== ACTION_TEST
? MANAGER_TEST_FULL
: 0,
2406 log_emergency_errno(r
, "Failed to allocate manager object: %m");
2407 error_message
= "Failed to allocate manager object";
2411 m
->timestamps
[MANAGER_TIMESTAMP_KERNEL
] = kernel_timestamp
;
2412 m
->timestamps
[MANAGER_TIMESTAMP_INITRD
] = initrd_timestamp
;
2413 m
->timestamps
[MANAGER_TIMESTAMP_USERSPACE
] = userspace_timestamp
;
2414 m
->timestamps
[manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_SECURITY_START
)] = security_start_timestamp
;
2415 m
->timestamps
[manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_SECURITY_FINISH
)] = security_finish_timestamp
;
2417 set_manager_defaults(m
);
2418 set_manager_settings(m
);
2419 manager_set_first_boot(m
, first_boot
);
2421 /* Remember whether we should queue the default job */
2422 queue_default_job
= !arg_serialization
|| arg_switched_root
;
2424 before_startup
= now(CLOCK_MONOTONIC
);
2426 r
= manager_startup(m
, arg_serialization
, fds
);
2428 log_error_errno(r
, "Failed to fully start up daemon: %m");
2429 error_message
= "Failed to start up manager";
2433 /* This will close all file descriptors that were opened, but not claimed by any unit. */
2434 fds
= fdset_free(fds
);
2435 arg_serialization
= safe_fclose(arg_serialization
);
2437 if (queue_default_job
) {
2438 r
= do_queue_default_job(m
, &error_message
);
2443 after_startup
= now(CLOCK_MONOTONIC
);
2445 log_full(arg_action
== ACTION_TEST
? LOG_INFO
: LOG_DEBUG
,
2446 "Loaded units and determined initial transaction in %s.",
2447 format_timespan(timespan
, sizeof(timespan
), after_startup
- before_startup
, 100 * USEC_PER_MSEC
));
2449 if (arg_action
== ACTION_TEST
) {
2451 retval
= EXIT_SUCCESS
;
2455 (void) invoke_main_loop(m
,
2468 arg_shutdown_watchdog
= m
->shutdown_watchdog
;
2469 m
= manager_free(m
);
2473 mac_selinux_finish();
2476 do_reexecute(argc
, argv
,
2477 &saved_rlimit_nofile
,
2478 &saved_rlimit_memlock
,
2482 &error_message
); /* This only returns if reexecution failed */
2484 arg_serialization
= safe_fclose(arg_serialization
);
2485 fds
= fdset_free(fds
);
2487 #if HAVE_VALGRIND_VALGRIND_H
2488 /* If we are PID 1 and running under valgrind, then let's exit
2489 * here explicitly. valgrind will only generate nice output on
2490 * exit(), not on exec(), hence let's do the former not the
2492 if (getpid_cached() == 1 && RUNNING_ON_VALGRIND
) {
2493 /* Cleanup watchdog_device strings for valgrind. We need them
2494 * in become_shutdown() so normally we cannot free them yet. */
2495 watchdog_free_device();
2496 arg_watchdog_device
= mfree(arg_watchdog_device
);
2501 if (shutdown_verb
) {
2502 r
= become_shutdown(shutdown_verb
, retval
);
2503 log_error_errno(r
, "Failed to execute shutdown binary, %s: %m", getpid_cached() == 1 ? "freezing" : "quitting");
2504 error_message
= "Failed to execute shutdown binary";
2507 watchdog_free_device();
2508 arg_watchdog_device
= mfree(arg_watchdog_device
);
2510 if (getpid_cached() == 1) {
2512 manager_status_printf(NULL
, STATUS_TYPE_EMERGENCY
,
2513 ANSI_HIGHLIGHT_RED
"!!!!!!" ANSI_NORMAL
,
2514 "%s, freezing.", error_message
);