1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include <sys/mount.h>
29 #include <sys/prctl.h>
30 #include <sys/reboot.h>
36 #ifdef HAVE_VALGRIND_VALGRIND_H
37 #include <valgrind/valgrind.h>
40 #include "sd-daemon.h"
43 #include "architecture.h"
45 #include "bus-error.h"
47 #include "capability.h"
48 #include "clock-util.h"
49 #include "conf-parser.h"
50 #include "cpu-set-util.h"
51 #include "dbus-manager.h"
57 #include "formats-util.h"
58 #include "hostname-setup.h"
59 #include "ima-setup.h"
61 #include "kmod-setup.h"
62 #include "load-fragment.h"
64 #include "loopback-setup.h"
65 #include "machine-id-setup.h"
68 #include "mount-setup.h"
70 #include "process-util.h"
71 #include "selinux-setup.h"
72 #include "selinux-util.h"
73 #include "signal-util.h"
74 #include "smack-setup.h"
77 #include "switch-root.h"
78 #include "terminal-util.h"
87 ACTION_DUMP_CONFIGURATION_ITEMS
,
89 } arg_action
= ACTION_RUN
;
90 static char *arg_default_unit
= NULL
;
91 static ManagerRunningAs arg_running_as
= _MANAGER_RUNNING_AS_INVALID
;
92 static bool arg_dump_core
= true;
93 static int arg_crash_chvt
= -1;
94 static bool arg_crash_shell
= false;
95 static bool arg_crash_reboot
= false;
96 static bool arg_confirm_spawn
= false;
97 static ShowStatus arg_show_status
= _SHOW_STATUS_UNSET
;
98 static bool arg_switched_root
= false;
99 static int arg_no_pager
= -1;
100 static char ***arg_join_controllers
= NULL
;
101 static ExecOutput arg_default_std_output
= EXEC_OUTPUT_JOURNAL
;
102 static ExecOutput arg_default_std_error
= EXEC_OUTPUT_INHERIT
;
103 static usec_t arg_default_restart_usec
= DEFAULT_RESTART_USEC
;
104 static usec_t arg_default_timeout_start_usec
= DEFAULT_TIMEOUT_USEC
;
105 static usec_t arg_default_timeout_stop_usec
= DEFAULT_TIMEOUT_USEC
;
106 static usec_t arg_default_start_limit_interval
= DEFAULT_START_LIMIT_INTERVAL
;
107 static unsigned arg_default_start_limit_burst
= DEFAULT_START_LIMIT_BURST
;
108 static usec_t arg_runtime_watchdog
= 0;
109 static usec_t arg_shutdown_watchdog
= 10 * USEC_PER_MINUTE
;
110 static char **arg_default_environment
= NULL
;
111 static struct rlimit
*arg_default_rlimit
[_RLIMIT_MAX
] = {};
112 static uint64_t arg_capability_bounding_set_drop
= 0;
113 static nsec_t arg_timer_slack_nsec
= NSEC_INFINITY
;
114 static usec_t arg_default_timer_accuracy_usec
= 1 * USEC_PER_MINUTE
;
115 static Set
* arg_syscall_archs
= NULL
;
116 static FILE* arg_serialization
= NULL
;
117 static bool arg_default_cpu_accounting
= false;
118 static bool arg_default_blockio_accounting
= false;
119 static bool arg_default_memory_accounting
= false;
120 static bool arg_default_tasks_accounting
= false;
122 static void pager_open_if_enabled(void) {
124 if (arg_no_pager
<= 0)
130 noreturn
static void freeze_or_reboot(void) {
132 if (arg_crash_reboot
) {
133 log_notice("Rebooting in 10s...");
136 log_notice("Rebooting now...");
137 (void) reboot(RB_AUTOBOOT
);
138 log_emergency_errno(errno
, "Failed to reboot: %m");
141 log_emergency("Freezing execution.");
145 noreturn
static void crash(int sig
) {
150 /* Pass this on immediately, if this is not PID 1 */
152 else if (!arg_dump_core
)
153 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig
));
155 sa
= (struct sigaction
) {
156 .sa_handler
= nop_signal_handler
,
157 .sa_flags
= SA_NOCLDSTOP
|SA_RESTART
,
160 /* We want to wait for the core process, hence let's enable SIGCHLD */
161 (void) sigaction(SIGCHLD
, &sa
, NULL
);
163 pid
= raw_clone(SIGCHLD
, NULL
);
165 log_emergency_errno(errno
, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig
));
168 .rlim_cur
= RLIM_INFINITY
,
169 .rlim_max
= RLIM_INFINITY
,
172 /* Enable default signal handler for core dump */
173 sa
= (struct sigaction
) {
174 .sa_handler
= SIG_DFL
,
176 (void) sigaction(sig
, &sa
, NULL
);
178 /* Don't limit the core dump size */
179 (void) setrlimit(RLIMIT_CORE
, &rl
);
181 /* Just to be sure... */
184 /* Raise the signal again */
186 (void) kill(pid
, sig
); /* raise() would kill the parent */
188 assert_not_reached("We shouldn't be here...");
194 /* Order things nicely. */
195 r
= wait_for_terminate(pid
, &status
);
197 log_emergency_errno(r
, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig
));
198 else if (status
.si_code
!= CLD_DUMPED
)
199 log_emergency("Caught <%s>, core dump failed (child "PID_FMT
", code=%s, status=%i/%s).",
200 signal_to_string(sig
),
201 pid
, sigchld_code_to_string(status
.si_code
),
203 strna(status
.si_code
== CLD_EXITED
204 ? exit_status_to_string(status
.si_status
, EXIT_STATUS_FULL
)
205 : signal_to_string(status
.si_status
)));
207 log_emergency("Caught <%s>, dumped core as pid "PID_FMT
".", signal_to_string(sig
), pid
);
211 if (arg_crash_chvt
>= 0)
212 (void) chvt(arg_crash_chvt
);
214 sa
= (struct sigaction
) {
215 .sa_handler
= SIG_IGN
,
216 .sa_flags
= SA_NOCLDSTOP
|SA_NOCLDWAIT
|SA_RESTART
,
219 /* Let the kernel reap children for us */
220 (void) sigaction(SIGCHLD
, &sa
, NULL
);
222 if (arg_crash_shell
) {
223 log_notice("Executing crash shell in 10s...");
226 pid
= raw_clone(SIGCHLD
, NULL
);
228 log_emergency_errno(errno
, "Failed to fork off crash shell: %m");
231 (void) make_console_stdio();
232 (void) execle("/bin/sh", "/bin/sh", NULL
, environ
);
234 log_emergency_errno(errno
, "execle() failed: %m");
237 log_info("Spawned crash shell as PID "PID_FMT
".", pid
);
238 (void) wait_for_terminate(pid
, NULL
);
245 static void install_crash_handler(void) {
246 static const struct sigaction sa
= {
248 .sa_flags
= SA_NODEFER
, /* So that we can raise the signal again from the signal handler */
252 /* We ignore the return value here, since, we don't mind if we
253 * cannot set up a crash handler */
254 r
= sigaction_many(&sa
, SIGNALS_CRASH_HANDLER
, -1);
256 log_debug_errno(r
, "I had trouble setting up the crash handler, ignoring: %m");
259 static int console_setup(void) {
260 _cleanup_close_
int tty_fd
= -1;
263 tty_fd
= open_terminal("/dev/console", O_WRONLY
|O_NOCTTY
|O_CLOEXEC
);
265 return log_error_errno(tty_fd
, "Failed to open /dev/console: %m");
267 /* We don't want to force text mode. plymouth may be showing
268 * pictures already from initrd. */
269 r
= reset_terminal_fd(tty_fd
, false);
271 return log_error_errno(r
, "Failed to reset /dev/console: %m");
276 static int parse_crash_chvt(const char *value
) {
279 if (safe_atoi(value
, &arg_crash_chvt
) >= 0)
282 b
= parse_boolean(value
);
287 arg_crash_chvt
= 0; /* switch to where kmsg goes */
289 arg_crash_chvt
= -1; /* turn off switching */
294 static int parse_proc_cmdline_item(const char *key
, const char *value
) {
296 static const char * const rlmap
[] = {
297 "emergency", SPECIAL_EMERGENCY_TARGET
,
298 "-b", SPECIAL_EMERGENCY_TARGET
,
299 "rescue", SPECIAL_RESCUE_TARGET
,
300 "single", SPECIAL_RESCUE_TARGET
,
301 "-s", SPECIAL_RESCUE_TARGET
,
302 "s", SPECIAL_RESCUE_TARGET
,
303 "S", SPECIAL_RESCUE_TARGET
,
304 "1", SPECIAL_RESCUE_TARGET
,
305 "2", SPECIAL_MULTI_USER_TARGET
,
306 "3", SPECIAL_MULTI_USER_TARGET
,
307 "4", SPECIAL_MULTI_USER_TARGET
,
308 "5", SPECIAL_GRAPHICAL_TARGET
,
314 if (streq(key
, "systemd.unit") && value
) {
317 return free_and_strdup(&arg_default_unit
, value
);
319 } else if (streq(key
, "rd.systemd.unit") && value
) {
322 return free_and_strdup(&arg_default_unit
, value
);
324 } else if (streq(key
, "systemd.dump_core") && value
) {
326 r
= parse_boolean(value
);
328 log_warning("Failed to parse dump core switch %s. Ignoring.", value
);
332 } else if (streq(key
, "systemd.crash_chvt") && value
) {
334 if (parse_crash_chvt(value
) < 0)
335 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value
);
337 } else if (streq(key
, "systemd.crash_shell") && value
) {
339 r
= parse_boolean(value
);
341 log_warning("Failed to parse crash shell switch %s. Ignoring.", value
);
345 } else if (streq(key
, "systemd.crash_reboot") && value
) {
347 r
= parse_boolean(value
);
349 log_warning("Failed to parse crash reboot switch %s. Ignoring.", value
);
351 arg_crash_reboot
= r
;
353 } else if (streq(key
, "systemd.confirm_spawn") && value
) {
355 r
= parse_boolean(value
);
357 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value
);
359 arg_confirm_spawn
= r
;
361 } else if (streq(key
, "systemd.show_status") && value
) {
363 r
= parse_show_status(value
, &arg_show_status
);
365 log_warning("Failed to parse show status switch %s. Ignoring.", value
);
367 } else if (streq(key
, "systemd.default_standard_output") && value
) {
369 r
= exec_output_from_string(value
);
371 log_warning("Failed to parse default standard output switch %s. Ignoring.", value
);
373 arg_default_std_output
= r
;
375 } else if (streq(key
, "systemd.default_standard_error") && value
) {
377 r
= exec_output_from_string(value
);
379 log_warning("Failed to parse default standard error switch %s. Ignoring.", value
);
381 arg_default_std_error
= r
;
383 } else if (streq(key
, "systemd.setenv") && value
) {
385 if (env_assignment_is_valid(value
)) {
388 env
= strv_env_set(arg_default_environment
, value
);
390 arg_default_environment
= env
;
392 log_warning_errno(ENOMEM
, "Setting environment variable '%s' failed, ignoring: %m", value
);
394 log_warning("Environment variable name '%s' is not valid. Ignoring.", value
);
396 } else if (streq(key
, "quiet") && !value
) {
398 if (arg_show_status
== _SHOW_STATUS_UNSET
)
399 arg_show_status
= SHOW_STATUS_AUTO
;
401 } else if (streq(key
, "debug") && !value
) {
403 /* Note that log_parse_environment() handles 'debug'
404 * too, and sets the log level to LOG_DEBUG. */
406 if (detect_container() > 0)
407 log_set_target(LOG_TARGET_CONSOLE
);
409 } else if (!in_initrd() && !value
) {
412 /* SysV compatibility */
413 for (i
= 0; i
< ELEMENTSOF(rlmap
); i
+= 2)
414 if (streq(key
, rlmap
[i
]))
415 return free_and_strdup(&arg_default_unit
, rlmap
[i
+1]);
421 #define DEFINE_SETTER(name, func, descr) \
422 static int name(const char *unit, \
423 const char *filename, \
425 const char *section, \
426 unsigned section_line, \
427 const char *lvalue, \
429 const char *rvalue, \
441 log_syntax(unit, LOG_ERR, filename, line, r, \
442 "Invalid " descr "'%s': %m", \
448 DEFINE_SETTER(config_parse_level2
, log_set_max_level_from_string
, "log level")
449 DEFINE_SETTER(config_parse_target
, log_set_target_from_string
, "target")
450 DEFINE_SETTER(config_parse_color
, log_show_color_from_string
, "color" )
451 DEFINE_SETTER(config_parse_location
, log_show_location_from_string
, "location")
453 static int config_parse_cpu_affinity2(
455 const char *filename
,
458 unsigned section_line
,
465 _cleanup_cpu_free_ cpu_set_t
*c
= NULL
;
468 ncpus
= parse_cpu_set_and_warn(rvalue
, &c
, unit
, filename
, line
, lvalue
);
472 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus
), c
) < 0)
473 log_warning("Failed to set CPU affinity: %m");
478 static int config_parse_show_status(
480 const char *filename
,
483 unsigned section_line
,
491 ShowStatus
*b
= data
;
498 k
= parse_show_status(rvalue
, b
);
500 log_syntax(unit
, LOG_ERR
, filename
, line
, k
, "Failed to parse show status setting, ignoring: %s", rvalue
);
507 static int config_parse_crash_chvt(
509 const char *filename
,
512 unsigned section_line
,
525 r
= parse_crash_chvt(rvalue
);
527 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse CrashChangeVT= setting, ignoring: %s", rvalue
);
534 static int config_parse_join_controllers(const char *unit
,
535 const char *filename
,
538 unsigned section_line
,
545 const char *whole_rvalue
= rvalue
;
552 arg_join_controllers
= strv_free_free(arg_join_controllers
);
555 _cleanup_free_
char *word
= NULL
;
559 r
= extract_first_word(&rvalue
, &word
, WHITESPACE
, EXTRACT_QUOTES
);
561 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid value for %s: %s", lvalue
, whole_rvalue
);
567 l
= strv_split(word
, ",");
572 if (strv_length(l
) <= 1) {
577 if (!arg_join_controllers
) {
578 arg_join_controllers
= new(char**, 2);
579 if (!arg_join_controllers
) {
584 arg_join_controllers
[0] = l
;
585 arg_join_controllers
[1] = NULL
;
592 t
= new0(char**, n
+2);
600 for (a
= arg_join_controllers
; *a
; a
++) {
602 if (strv_overlap(*a
, l
)) {
603 if (strv_extend_strv(&l
, *a
, false) < 0) {
623 t
[n
++] = strv_uniq(l
);
625 strv_free_free(arg_join_controllers
);
626 arg_join_controllers
= t
;
629 if (!isempty(rvalue
))
630 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Trailing garbage, ignoring.");
635 static int parse_config_file(void) {
637 const ConfigTableItem items
[] = {
638 { "Manager", "LogLevel", config_parse_level2
, 0, NULL
},
639 { "Manager", "LogTarget", config_parse_target
, 0, NULL
},
640 { "Manager", "LogColor", config_parse_color
, 0, NULL
},
641 { "Manager", "LogLocation", config_parse_location
, 0, NULL
},
642 { "Manager", "DumpCore", config_parse_bool
, 0, &arg_dump_core
},
643 { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt
, 0, NULL
},
644 { "Manager", "CrashChangeVT", config_parse_crash_chvt
, 0, NULL
},
645 { "Manager", "CrashShell", config_parse_bool
, 0, &arg_crash_shell
},
646 { "Manager", "CrashReboot", config_parse_bool
, 0, &arg_crash_reboot
},
647 { "Manager", "ShowStatus", config_parse_show_status
, 0, &arg_show_status
},
648 { "Manager", "CPUAffinity", config_parse_cpu_affinity2
, 0, NULL
},
649 { "Manager", "JoinControllers", config_parse_join_controllers
, 0, &arg_join_controllers
},
650 { "Manager", "RuntimeWatchdogSec", config_parse_sec
, 0, &arg_runtime_watchdog
},
651 { "Manager", "ShutdownWatchdogSec", config_parse_sec
, 0, &arg_shutdown_watchdog
},
652 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set
, 0, &arg_capability_bounding_set_drop
},
654 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs
, 0, &arg_syscall_archs
},
656 { "Manager", "TimerSlackNSec", config_parse_nsec
, 0, &arg_timer_slack_nsec
},
657 { "Manager", "DefaultTimerAccuracySec", config_parse_sec
, 0, &arg_default_timer_accuracy_usec
},
658 { "Manager", "DefaultStandardOutput", config_parse_output
, 0, &arg_default_std_output
},
659 { "Manager", "DefaultStandardError", config_parse_output
, 0, &arg_default_std_error
},
660 { "Manager", "DefaultTimeoutStartSec", config_parse_sec
, 0, &arg_default_timeout_start_usec
},
661 { "Manager", "DefaultTimeoutStopSec", config_parse_sec
, 0, &arg_default_timeout_stop_usec
},
662 { "Manager", "DefaultRestartSec", config_parse_sec
, 0, &arg_default_restart_usec
},
663 { "Manager", "DefaultStartLimitInterval", config_parse_sec
, 0, &arg_default_start_limit_interval
},
664 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned
, 0, &arg_default_start_limit_burst
},
665 { "Manager", "DefaultEnvironment", config_parse_environ
, 0, &arg_default_environment
},
666 { "Manager", "DefaultLimitCPU", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_CPU
] },
667 { "Manager", "DefaultLimitFSIZE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_FSIZE
] },
668 { "Manager", "DefaultLimitDATA", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_DATA
] },
669 { "Manager", "DefaultLimitSTACK", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_STACK
] },
670 { "Manager", "DefaultLimitCORE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_CORE
] },
671 { "Manager", "DefaultLimitRSS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RSS
] },
672 { "Manager", "DefaultLimitNOFILE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NOFILE
] },
673 { "Manager", "DefaultLimitAS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_AS
] },
674 { "Manager", "DefaultLimitNPROC", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NPROC
] },
675 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_MEMLOCK
] },
676 { "Manager", "DefaultLimitLOCKS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_LOCKS
] },
677 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_SIGPENDING
] },
678 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_MSGQUEUE
] },
679 { "Manager", "DefaultLimitNICE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NICE
] },
680 { "Manager", "DefaultLimitRTPRIO", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RTPRIO
] },
681 { "Manager", "DefaultLimitRTTIME", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RTTIME
] },
682 { "Manager", "DefaultCPUAccounting", config_parse_bool
, 0, &arg_default_cpu_accounting
},
683 { "Manager", "DefaultBlockIOAccounting", config_parse_bool
, 0, &arg_default_blockio_accounting
},
684 { "Manager", "DefaultMemoryAccounting", config_parse_bool
, 0, &arg_default_memory_accounting
},
685 { "Manager", "DefaultTasksAccounting", config_parse_bool
, 0, &arg_default_tasks_accounting
},
689 const char *fn
, *conf_dirs_nulstr
;
691 fn
= arg_running_as
== MANAGER_SYSTEM
? PKGSYSCONFDIR
"/system.conf" : PKGSYSCONFDIR
"/user.conf";
692 conf_dirs_nulstr
= arg_running_as
== MANAGER_SYSTEM
? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");
693 config_parse_many(fn
, conf_dirs_nulstr
, "Manager\0",
694 config_item_table_lookup
, items
, false, NULL
);
699 static void manager_set_defaults(Manager
*m
) {
703 m
->default_timer_accuracy_usec
= arg_default_timer_accuracy_usec
;
704 m
->default_std_output
= arg_default_std_output
;
705 m
->default_std_error
= arg_default_std_error
;
706 m
->default_timeout_start_usec
= arg_default_timeout_start_usec
;
707 m
->default_timeout_stop_usec
= arg_default_timeout_stop_usec
;
708 m
->default_restart_usec
= arg_default_restart_usec
;
709 m
->default_start_limit_interval
= arg_default_start_limit_interval
;
710 m
->default_start_limit_burst
= arg_default_start_limit_burst
;
711 m
->default_cpu_accounting
= arg_default_cpu_accounting
;
712 m
->default_blockio_accounting
= arg_default_blockio_accounting
;
713 m
->default_memory_accounting
= arg_default_memory_accounting
;
714 m
->default_tasks_accounting
= arg_default_tasks_accounting
;
716 manager_set_default_rlimits(m
, arg_default_rlimit
);
717 manager_environment_add(m
, NULL
, arg_default_environment
);
720 static int parse_argv(int argc
, char *argv
[]) {
723 ARG_LOG_LEVEL
= 0x100,
733 ARG_DUMP_CONFIGURATION_ITEMS
,
742 ARG_DEFAULT_STD_OUTPUT
,
743 ARG_DEFAULT_STD_ERROR
746 static const struct option options
[] = {
747 { "log-level", required_argument
, NULL
, ARG_LOG_LEVEL
},
748 { "log-target", required_argument
, NULL
, ARG_LOG_TARGET
},
749 { "log-color", optional_argument
, NULL
, ARG_LOG_COLOR
},
750 { "log-location", optional_argument
, NULL
, ARG_LOG_LOCATION
},
751 { "unit", required_argument
, NULL
, ARG_UNIT
},
752 { "system", no_argument
, NULL
, ARG_SYSTEM
},
753 { "user", no_argument
, NULL
, ARG_USER
},
754 { "test", no_argument
, NULL
, ARG_TEST
},
755 { "no-pager", no_argument
, NULL
, ARG_NO_PAGER
},
756 { "help", no_argument
, NULL
, 'h' },
757 { "version", no_argument
, NULL
, ARG_VERSION
},
758 { "dump-configuration-items", no_argument
, NULL
, ARG_DUMP_CONFIGURATION_ITEMS
},
759 { "dump-core", optional_argument
, NULL
, ARG_DUMP_CORE
},
760 { "crash-chvt", required_argument
, NULL
, ARG_CRASH_CHVT
},
761 { "crash-shell", optional_argument
, NULL
, ARG_CRASH_SHELL
},
762 { "crash-reboot", optional_argument
, NULL
, ARG_CRASH_REBOOT
},
763 { "confirm-spawn", optional_argument
, NULL
, ARG_CONFIRM_SPAWN
},
764 { "show-status", optional_argument
, NULL
, ARG_SHOW_STATUS
},
765 { "deserialize", required_argument
, NULL
, ARG_DESERIALIZE
},
766 { "switched-root", no_argument
, NULL
, ARG_SWITCHED_ROOT
},
767 { "default-standard-output", required_argument
, NULL
, ARG_DEFAULT_STD_OUTPUT
, },
768 { "default-standard-error", required_argument
, NULL
, ARG_DEFAULT_STD_ERROR
, },
780 while ((c
= getopt_long(argc
, argv
, "hDbsz:", options
, NULL
)) >= 0)
785 r
= log_set_max_level_from_string(optarg
);
787 log_error("Failed to parse log level %s.", optarg
);
794 r
= log_set_target_from_string(optarg
);
796 log_error("Failed to parse log target %s.", optarg
);
805 r
= log_show_color_from_string(optarg
);
807 log_error("Failed to parse log color setting %s.", optarg
);
811 log_show_color(true);
815 case ARG_LOG_LOCATION
:
817 r
= log_show_location_from_string(optarg
);
819 log_error("Failed to parse log location setting %s.", optarg
);
823 log_show_location(true);
827 case ARG_DEFAULT_STD_OUTPUT
:
828 r
= exec_output_from_string(optarg
);
830 log_error("Failed to parse default standard output setting %s.", optarg
);
833 arg_default_std_output
= r
;
836 case ARG_DEFAULT_STD_ERROR
:
837 r
= exec_output_from_string(optarg
);
839 log_error("Failed to parse default standard error output setting %s.", optarg
);
842 arg_default_std_error
= r
;
847 r
= free_and_strdup(&arg_default_unit
, optarg
);
849 return log_error_errno(r
, "Failed to set default unit %s: %m", optarg
);
854 arg_running_as
= MANAGER_SYSTEM
;
858 arg_running_as
= MANAGER_USER
;
862 arg_action
= ACTION_TEST
;
863 if (arg_no_pager
< 0)
872 arg_action
= ACTION_VERSION
;
875 case ARG_DUMP_CONFIGURATION_ITEMS
:
876 arg_action
= ACTION_DUMP_CONFIGURATION_ITEMS
;
881 arg_dump_core
= true;
883 r
= parse_boolean(optarg
);
885 return log_error_errno(r
, "Failed to parse dump core boolean: %s", optarg
);
891 r
= parse_crash_chvt(optarg
);
893 return log_error_errno(r
, "Failed to parse crash virtual terminal index: %s", optarg
);
896 case ARG_CRASH_SHELL
:
898 arg_crash_shell
= true;
900 r
= parse_boolean(optarg
);
902 return log_error_errno(r
, "Failed to parse crash shell boolean: %s", optarg
);
907 case ARG_CRASH_REBOOT
:
909 arg_crash_reboot
= true;
911 r
= parse_boolean(optarg
);
913 return log_error_errno(r
, "Failed to parse crash shell boolean: %s", optarg
);
914 arg_crash_reboot
= r
;
918 case ARG_CONFIRM_SPAWN
:
919 r
= optarg
? parse_boolean(optarg
) : 1;
921 log_error("Failed to parse confirm spawn boolean %s.", optarg
);
924 arg_confirm_spawn
= r
;
927 case ARG_SHOW_STATUS
:
929 r
= parse_show_status(optarg
, &arg_show_status
);
931 log_error("Failed to parse show status boolean %s.", optarg
);
935 arg_show_status
= SHOW_STATUS_YES
;
938 case ARG_DESERIALIZE
: {
942 r
= safe_atoi(optarg
, &fd
);
943 if (r
< 0 || fd
< 0) {
944 log_error("Failed to parse deserialize option %s.", optarg
);
948 (void) fd_cloexec(fd
, true);
952 return log_error_errno(errno
, "Failed to open serialization fd: %m");
954 safe_fclose(arg_serialization
);
955 arg_serialization
= f
;
960 case ARG_SWITCHED_ROOT
:
961 arg_switched_root
= true;
965 arg_action
= ACTION_HELP
;
966 if (arg_no_pager
< 0)
971 log_set_max_level(LOG_DEBUG
);
977 /* Just to eat away the sysvinit kernel
978 * cmdline args without getopt() error
979 * messages that we'll parse in
980 * parse_proc_cmdline_word() or ignore. */
989 assert_not_reached("Unhandled option code.");
992 if (optind
< argc
&& getpid() != 1) {
993 /* Hmm, when we aren't run as init system
994 * let's complain about excess arguments */
996 log_error("Excess arguments.");
1003 static int help(void) {
1005 printf("%s [OPTIONS...]\n\n"
1006 "Starts up and maintains the system or user services.\n\n"
1007 " -h --help Show this help\n"
1008 " --test Determine startup sequence, dump it and exit\n"
1009 " --no-pager Do not pipe output into a pager\n"
1010 " --dump-configuration-items Dump understood unit configuration items\n"
1011 " --unit=UNIT Set default unit\n"
1012 " --system Run a system instance, even if PID != 1\n"
1013 " --user Run a user instance\n"
1014 " --dump-core[=BOOL] Dump core on crash\n"
1015 " --crash-vt=NR Change to specified VT on crash\n"
1016 " --crash-reboot[=BOOL] Reboot on crash\n"
1017 " --crash-shell[=BOOL] Run shell on crash\n"
1018 " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n"
1019 " --show-status[=BOOL] Show status updates on the console during bootup\n"
1020 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
1021 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1022 " --log-color[=BOOL] Highlight important log messages\n"
1023 " --log-location[=BOOL] Include code location in log messages\n"
1024 " --default-standard-output= Set default standard output for services\n"
1025 " --default-standard-error= Set default standard error output for services\n",
1026 program_invocation_short_name
);
1031 static int prepare_reexecute(Manager
*m
, FILE **_f
, FDSet
**_fds
, bool switching_root
) {
1032 _cleanup_fdset_free_ FDSet
*fds
= NULL
;
1033 _cleanup_fclose_
FILE *f
= NULL
;
1040 r
= manager_open_serialization(m
, &f
);
1042 return log_error_errno(r
, "Failed to create serialization file: %m");
1044 /* Make sure nothing is really destructed when we shut down */
1046 bus_manager_send_reloading(m
, true);
1052 r
= manager_serialize(m
, f
, fds
, switching_root
);
1054 return log_error_errno(r
, "Failed to serialize state: %m");
1056 if (fseeko(f
, 0, SEEK_SET
) == (off_t
) -1)
1057 return log_error_errno(errno
, "Failed to rewind serialization fd: %m");
1059 r
= fd_cloexec(fileno(f
), false);
1061 return log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization: %m");
1063 r
= fdset_cloexec(fds
, false);
1065 return log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization fds: %m");
1076 static int bump_rlimit_nofile(struct rlimit
*saved_rlimit
) {
1080 assert(saved_rlimit
);
1082 /* Save the original RLIMIT_NOFILE so that we can reset it
1083 * later when transitioning from the initrd to the main
1084 * systemd or suchlike. */
1085 if (getrlimit(RLIMIT_NOFILE
, saved_rlimit
) < 0)
1086 return log_error_errno(errno
, "Reading RLIMIT_NOFILE failed: %m");
1088 /* Make sure forked processes get the default kernel setting */
1089 if (!arg_default_rlimit
[RLIMIT_NOFILE
]) {
1092 rl
= newdup(struct rlimit
, saved_rlimit
, 1);
1096 arg_default_rlimit
[RLIMIT_NOFILE
] = rl
;
1099 /* Bump up the resource limit for ourselves substantially */
1100 nl
.rlim_cur
= nl
.rlim_max
= 64*1024;
1101 r
= setrlimit_closest(RLIMIT_NOFILE
, &nl
);
1103 return log_error_errno(r
, "Setting RLIMIT_NOFILE failed: %m");
1108 static void test_mtab(void) {
1110 static const char ok
[] =
1111 "/proc/self/mounts\0"
1113 "../proc/self/mounts\0"
1116 _cleanup_free_
char *p
= NULL
;
1119 /* Check that /etc/mtab is a symlink to the right place or
1120 * non-existing. But certainly not a file, or a symlink to
1121 * some weird place... */
1123 r
= readlink_malloc("/etc/mtab", &p
);
1126 if (r
>= 0 && nulstr_contains(ok
, p
))
1129 log_error("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1130 "This is not supported anymore. "
1131 "Please replace /etc/mtab with a symlink to /proc/self/mounts.");
1135 static void test_usr(void) {
1137 /* Check that /usr is not a separate fs */
1139 if (dir_is_empty("/usr") <= 0)
1142 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1143 "Some things will probably break (sometimes even silently) in mysterious ways. "
1144 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1147 static int initialize_join_controllers(void) {
1148 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1149 * + "net_prio". We'd like to add "cpuset" to the mix, but
1150 * "cpuset" doesn't really work for groups with no initialized
1153 arg_join_controllers
= new(char**, 3);
1154 if (!arg_join_controllers
)
1157 arg_join_controllers
[0] = strv_new("cpu", "cpuacct", NULL
);
1158 if (!arg_join_controllers
[0])
1161 arg_join_controllers
[1] = strv_new("net_cls", "net_prio", NULL
);
1162 if (!arg_join_controllers
[1])
1165 arg_join_controllers
[2] = NULL
;
1169 arg_join_controllers
= strv_free_free(arg_join_controllers
);
1173 static int enforce_syscall_archs(Set
*archs
) {
1175 scmp_filter_ctx
*seccomp
;
1180 seccomp
= seccomp_init(SCMP_ACT_ALLOW
);
1184 SET_FOREACH(id
, arg_syscall_archs
, i
) {
1185 r
= seccomp_arch_add(seccomp
, PTR_TO_UINT32(id
) - 1);
1189 log_error_errno(r
, "Failed to add architecture to seccomp: %m");
1194 r
= seccomp_attr_set(seccomp
, SCMP_FLTATR_CTL_NNP
, 0);
1196 log_error_errno(r
, "Failed to unset NO_NEW_PRIVS: %m");
1200 r
= seccomp_load(seccomp
);
1202 log_error_errno(r
, "Failed to add install architecture seccomp: %m");
1205 seccomp_release(seccomp
);
1212 static int status_welcome(void) {
1213 _cleanup_free_
char *pretty_name
= NULL
, *ansi_color
= NULL
;
1216 r
= parse_env_file("/etc/os-release", NEWLINE
,
1217 "PRETTY_NAME", &pretty_name
,
1218 "ANSI_COLOR", &ansi_color
,
1221 r
= parse_env_file("/usr/lib/os-release", NEWLINE
,
1222 "PRETTY_NAME", &pretty_name
,
1223 "ANSI_COLOR", &ansi_color
,
1226 if (r
< 0 && r
!= -ENOENT
)
1227 log_warning_errno(r
, "Failed to read os-release file: %m");
1229 return status_printf(NULL
, false, false,
1230 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1231 isempty(ansi_color
) ? "1" : ansi_color
,
1232 isempty(pretty_name
) ? "Linux" : pretty_name
);
1235 static int write_container_id(void) {
1238 c
= getenv("container");
1242 return write_string_file("/run/systemd/container", c
, WRITE_STRING_FILE_CREATE
);
1245 int main(int argc
, char *argv
[]) {
1247 int r
, retval
= EXIT_FAILURE
;
1248 usec_t before_startup
, after_startup
;
1249 char timespan
[FORMAT_TIMESPAN_MAX
];
1251 bool reexecute
= false;
1252 const char *shutdown_verb
= NULL
;
1253 dual_timestamp initrd_timestamp
= DUAL_TIMESTAMP_NULL
;
1254 dual_timestamp userspace_timestamp
= DUAL_TIMESTAMP_NULL
;
1255 dual_timestamp kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
1256 dual_timestamp security_start_timestamp
= DUAL_TIMESTAMP_NULL
;
1257 dual_timestamp security_finish_timestamp
= DUAL_TIMESTAMP_NULL
;
1258 static char systemd
[] = "systemd";
1259 bool skip_setup
= false;
1261 bool loaded_policy
= false;
1262 bool arm_reboot_watchdog
= false;
1263 bool queue_default_job
= false;
1264 bool empty_etc
= false;
1265 char *switch_root_dir
= NULL
, *switch_root_init
= NULL
;
1266 struct rlimit saved_rlimit_nofile
= RLIMIT_MAKE_CONST(0);
1267 const char *error_message
= NULL
;
1269 #ifdef HAVE_SYSV_COMPAT
1270 if (getpid() != 1 && strstr(program_invocation_short_name
, "init")) {
1271 /* This is compatibility support for SysV, where
1272 * calling init as a user is identical to telinit. */
1275 execv(SYSTEMCTL_BINARY_PATH
, argv
);
1276 log_error_errno(errno
, "Failed to exec " SYSTEMCTL_BINARY_PATH
": %m");
1281 dual_timestamp_from_monotonic(&kernel_timestamp
, 0);
1282 dual_timestamp_get(&userspace_timestamp
);
1284 /* Determine if this is a reexecution or normal bootup. We do
1285 * the full command line parsing much later, so let's just
1286 * have a quick peek here. */
1287 if (strv_find(argv
+1, "--deserialize"))
1290 /* If we have switched root, do all the special setup
1292 if (strv_find(argv
+1, "--switched-root"))
1295 /* If we get started via the /sbin/init symlink then we are
1296 called 'init'. After a subsequent reexecution we are then
1297 called 'systemd'. That is confusing, hence let's call us
1298 systemd right-away. */
1299 program_invocation_short_name
= systemd
;
1300 prctl(PR_SET_NAME
, systemd
);
1305 log_show_color(isatty(STDERR_FILENO
) > 0);
1306 log_set_upgrade_syslog_to_journal(true);
1308 /* Disable the umask logic */
1312 if (getpid() == 1 && detect_container() <= 0) {
1314 /* Running outside of a container as PID 1 */
1315 arg_running_as
= MANAGER_SYSTEM
;
1317 log_set_target(LOG_TARGET_KMSG
);
1321 initrd_timestamp
= userspace_timestamp
;
1324 mount_setup_early();
1325 dual_timestamp_get(&security_start_timestamp
);
1326 if (mac_selinux_setup(&loaded_policy
) < 0) {
1327 error_message
= "Failed to load SELinux policy";
1329 } else if (ima_setup() < 0) {
1330 error_message
= "Failed to load IMA policy";
1332 } else if (mac_smack_setup(&loaded_policy
) < 0) {
1333 error_message
= "Failed to load SMACK policy";
1336 dual_timestamp_get(&security_finish_timestamp
);
1339 if (mac_selinux_init(NULL
) < 0) {
1340 error_message
= "Failed to initialize SELinux policy";
1345 if (clock_is_localtime() > 0) {
1349 * The very first call of settimeofday() also does a time warp in the kernel.
1351 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1352 * external tools to take care of maintaining the RTC and do all adjustments.
1353 * This matches the behavior of Windows, which leaves the RTC alone if the
1354 * registry tells that the RTC runs in UTC.
1356 r
= clock_set_timezone(&min
);
1358 log_error_errno(r
, "Failed to apply local time delta, ignoring: %m");
1360 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min
);
1361 } else if (!in_initrd()) {
1363 * Do a dummy very first call to seal the kernel's time warp magic.
1365 * Do not call this this from inside the initrd. The initrd might not
1366 * carry /etc/adjtime with LOCAL, but the real system could be set up
1367 * that way. In such case, we need to delay the time-warp or the sealing
1368 * until we reach the real system.
1370 * Do no set the kernel's timezone. The concept of local time cannot
1371 * be supported reliably, the time will jump or be incorrect at every daylight
1372 * saving time change. All kernel local time concepts will be treated
1375 clock_reset_timewarp();
1379 /* Set the default for later on, but don't actually
1380 * open the logs like this for now. Note that if we
1381 * are transitioning from the initrd there might still
1382 * be journal fd open, and we shouldn't attempt
1383 * opening that before we parsed /proc/cmdline which
1384 * might redirect output elsewhere. */
1385 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG
);
1387 } else if (getpid() == 1) {
1388 /* Running inside a container, as PID 1 */
1389 arg_running_as
= MANAGER_SYSTEM
;
1390 log_set_target(LOG_TARGET_CONSOLE
);
1391 log_close_console(); /* force reopen of /dev/console */
1394 /* For the later on, see above... */
1395 log_set_target(LOG_TARGET_JOURNAL
);
1397 /* clear the kernel timestamp,
1398 * because we are in a container */
1399 kernel_timestamp
.monotonic
= 0ULL;
1400 kernel_timestamp
.realtime
= 0ULL;
1403 /* Running as user instance */
1404 arg_running_as
= MANAGER_USER
;
1405 log_set_target(LOG_TARGET_AUTO
);
1408 /* clear the kernel timestamp,
1409 * because we are not PID 1 */
1410 kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
1413 /* Initialize default unit */
1414 r
= free_and_strdup(&arg_default_unit
, SPECIAL_DEFAULT_TARGET
);
1416 log_emergency_errno(r
, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET
);
1417 error_message
= "Failed to set default unit";
1421 r
= initialize_join_controllers();
1423 error_message
= "Failed to initialize cgroup controllers";
1427 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1428 * /proc/$PID/fd is available. */
1429 if (getpid() == 1) {
1431 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1435 r
= mount_setup(loaded_policy
);
1437 error_message
= "Failed to mount API filesystems";
1442 /* Reset all signal handlers. */
1443 (void) reset_all_signal_handlers();
1444 (void) ignore_signals(SIGNALS_IGNORE
, -1);
1446 if (parse_config_file() < 0) {
1447 error_message
= "Failed to parse config file";
1451 if (arg_running_as
== MANAGER_SYSTEM
) {
1452 r
= parse_proc_cmdline(parse_proc_cmdline_item
);
1454 log_warning_errno(r
, "Failed to parse kernel command line, ignoring: %m");
1457 /* Note that this also parses bits from the kernel command
1458 * line, including "debug". */
1459 log_parse_environment();
1461 if (parse_argv(argc
, argv
) < 0) {
1462 error_message
= "Failed to parse commandline arguments";
1466 if (arg_action
== ACTION_TEST
&&
1468 log_error("Don't run test mode as root.");
1472 if (arg_running_as
== MANAGER_USER
&&
1473 arg_action
== ACTION_RUN
&&
1475 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1479 if (arg_running_as
== MANAGER_SYSTEM
&&
1480 arg_action
== ACTION_RUN
&&
1481 running_in_chroot() > 0) {
1482 log_error("Cannot be run in a chroot() environment.");
1486 if (arg_action
== ACTION_TEST
)
1489 pager_open_if_enabled();
1491 if (arg_action
== ACTION_HELP
) {
1494 } else if (arg_action
== ACTION_VERSION
) {
1497 } else if (arg_action
== ACTION_DUMP_CONFIGURATION_ITEMS
) {
1498 unit_dump_config_items(stdout
);
1499 retval
= EXIT_SUCCESS
;
1501 } else if (arg_action
== ACTION_DONE
) {
1502 retval
= EXIT_SUCCESS
;
1506 if (arg_running_as
== MANAGER_USER
&&
1507 !getenv("XDG_RUNTIME_DIR")) {
1508 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1512 assert_se(arg_action
== ACTION_RUN
|| arg_action
== ACTION_TEST
);
1514 /* Close logging fds, in order not to confuse fdset below */
1517 /* Remember open file descriptors for later deserialization */
1518 r
= fdset_new_fill(&fds
);
1520 log_emergency_errno(r
, "Failed to allocate fd set: %m");
1521 error_message
= "Failed to allocate fd set";
1524 fdset_cloexec(fds
, true);
1526 if (arg_serialization
)
1527 assert_se(fdset_remove(fds
, fileno(arg_serialization
)) >= 0);
1529 if (arg_running_as
== MANAGER_SYSTEM
)
1530 /* Become a session leader if we aren't one yet. */
1533 /* Move out of the way, so that we won't block unmounts */
1534 assert_se(chdir("/") == 0);
1536 /* Reset the console, but only if this is really init and we
1537 * are freshly booted */
1538 if (arg_running_as
== MANAGER_SYSTEM
&& arg_action
== ACTION_RUN
) {
1540 /* If we are init, we connect stdin/stdout/stderr to
1541 * /dev/null and make sure we don't have a controlling
1545 if (getpid() == 1 && !skip_setup
)
1549 /* Open the logging devices, if possible and necessary */
1552 if (arg_show_status
== _SHOW_STATUS_UNSET
)
1553 arg_show_status
= SHOW_STATUS_YES
;
1555 /* Make sure we leave a core dump without panicing the
1557 if (getpid() == 1) {
1558 install_crash_handler();
1560 r
= mount_cgroup_controllers(arg_join_controllers
);
1565 if (arg_running_as
== MANAGER_SYSTEM
) {
1568 log_info(PACKAGE_STRING
" running in %ssystem mode. (" SYSTEMD_FEATURES
")",
1569 arg_action
== ACTION_TEST
? "test " : "" );
1571 v
= detect_virtualization();
1573 log_info("Detected virtualization %s.", virtualization_to_string(v
));
1575 write_container_id();
1577 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1580 log_info("Running in initial RAM disk.");
1582 /* Let's check whether /etc is already populated. We
1583 * don't actually really check for that, but use
1584 * /etc/machine-id as flag file. This allows container
1585 * managers and installers to provision a couple of
1586 * files already. If the container manager wants to
1587 * provision the machine ID itself it should pass
1588 * $container_uuid to PID 1. */
1590 empty_etc
= access("/etc/machine-id", F_OK
) < 0;
1592 log_info("Running with unpopulated /etc.");
1594 _cleanup_free_
char *t
;
1596 t
= uid_to_name(getuid());
1597 log_debug(PACKAGE_STRING
" running in %suser mode for user "UID_FMT
"/%s. (" SYSTEMD_FEATURES
")",
1598 arg_action
== ACTION_TEST
? " test" : "", getuid(), t
);
1601 if (arg_running_as
== MANAGER_SYSTEM
&& !skip_setup
) {
1602 if (arg_show_status
> 0)
1606 machine_id_setup(NULL
);
1613 if (arg_running_as
== MANAGER_SYSTEM
&& arg_runtime_watchdog
> 0)
1614 watchdog_set_timeout(&arg_runtime_watchdog
);
1616 if (arg_timer_slack_nsec
!= NSEC_INFINITY
)
1617 if (prctl(PR_SET_TIMERSLACK
, arg_timer_slack_nsec
) < 0)
1618 log_error_errno(errno
, "Failed to adjust timer slack: %m");
1620 if (arg_capability_bounding_set_drop
) {
1621 r
= capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop
);
1623 log_emergency_errno(r
, "Failed to drop capability bounding set of usermode helpers: %m");
1624 error_message
= "Failed to drop capability bounding set of usermode helpers";
1627 r
= capability_bounding_set_drop(arg_capability_bounding_set_drop
, true);
1629 log_emergency_errno(r
, "Failed to drop capability bounding set: %m");
1630 error_message
= "Failed to drop capability bounding set";
1635 if (arg_syscall_archs
) {
1636 r
= enforce_syscall_archs(arg_syscall_archs
);
1638 error_message
= "Failed to set syscall architectures";
1643 if (arg_running_as
== MANAGER_USER
)
1644 /* Become reaper of our children */
1645 if (prctl(PR_SET_CHILD_SUBREAPER
, 1) < 0)
1646 log_warning_errno(errno
, "Failed to make us a subreaper: %m");
1648 if (arg_running_as
== MANAGER_SYSTEM
) {
1649 bump_rlimit_nofile(&saved_rlimit_nofile
);
1652 r
= unit_file_preset_all(UNIT_FILE_SYSTEM
, false, NULL
, UNIT_FILE_PRESET_ENABLE_ONLY
, false, NULL
, 0);
1654 log_warning_errno(r
, "Failed to populate /etc with preset unit settings, ignoring: %m");
1656 log_info("Populated /etc with preset unit settings.");
1660 r
= manager_new(arg_running_as
, arg_action
== ACTION_TEST
, &m
);
1662 log_emergency_errno(r
, "Failed to allocate manager object: %m");
1663 error_message
= "Failed to allocate manager object";
1667 m
->confirm_spawn
= arg_confirm_spawn
;
1668 m
->runtime_watchdog
= arg_runtime_watchdog
;
1669 m
->shutdown_watchdog
= arg_shutdown_watchdog
;
1670 m
->userspace_timestamp
= userspace_timestamp
;
1671 m
->kernel_timestamp
= kernel_timestamp
;
1672 m
->initrd_timestamp
= initrd_timestamp
;
1673 m
->security_start_timestamp
= security_start_timestamp
;
1674 m
->security_finish_timestamp
= security_finish_timestamp
;
1676 manager_set_defaults(m
);
1677 manager_set_show_status(m
, arg_show_status
);
1678 manager_set_first_boot(m
, empty_etc
);
1680 /* Remember whether we should queue the default job */
1681 queue_default_job
= !arg_serialization
|| arg_switched_root
;
1683 before_startup
= now(CLOCK_MONOTONIC
);
1685 r
= manager_startup(m
, arg_serialization
, fds
);
1687 log_error_errno(r
, "Failed to fully start up daemon: %m");
1689 /* This will close all file descriptors that were opened, but
1690 * not claimed by any unit. */
1691 fds
= fdset_free(fds
);
1693 arg_serialization
= safe_fclose(arg_serialization
);
1695 if (queue_default_job
) {
1696 _cleanup_bus_error_free_ sd_bus_error error
= SD_BUS_ERROR_NULL
;
1697 Unit
*target
= NULL
;
1698 Job
*default_unit_job
;
1700 log_debug("Activating default unit: %s", arg_default_unit
);
1702 r
= manager_load_unit(m
, arg_default_unit
, NULL
, &error
, &target
);
1704 log_error("Failed to load default target: %s", bus_error_message(&error
, r
));
1705 else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
)
1706 log_error_errno(target
->load_error
, "Failed to load default target: %m");
1707 else if (target
->load_state
== UNIT_MASKED
)
1708 log_error("Default target masked.");
1710 if (!target
|| target
->load_state
!= UNIT_LOADED
) {
1711 log_info("Trying to load rescue target...");
1713 r
= manager_load_unit(m
, SPECIAL_RESCUE_TARGET
, NULL
, &error
, &target
);
1715 log_emergency("Failed to load rescue target: %s", bus_error_message(&error
, r
));
1716 error_message
= "Failed to load rescue target";
1718 } else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
) {
1719 log_emergency_errno(target
->load_error
, "Failed to load rescue target: %m");
1720 error_message
= "Failed to load rescue target";
1722 } else if (target
->load_state
== UNIT_MASKED
) {
1723 log_emergency("Rescue target masked.");
1724 error_message
= "Rescue target masked";
1729 assert(target
->load_state
== UNIT_LOADED
);
1731 if (arg_action
== ACTION_TEST
) {
1732 printf("-> By units:\n");
1733 manager_dump_units(m
, stdout
, "\t");
1736 r
= manager_add_job(m
, JOB_START
, target
, JOB_ISOLATE
, false, &error
, &default_unit_job
);
1738 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error
, r
));
1740 r
= manager_add_job(m
, JOB_START
, target
, JOB_REPLACE
, false, &error
, &default_unit_job
);
1742 log_emergency("Failed to start default target: %s", bus_error_message(&error
, r
));
1743 error_message
= "Failed to start default target";
1747 log_emergency("Failed to isolate default target: %s", bus_error_message(&error
, r
));
1748 error_message
= "Failed to isolate default target";
1752 m
->default_unit_job_id
= default_unit_job
->id
;
1754 after_startup
= now(CLOCK_MONOTONIC
);
1755 log_full(arg_action
== ACTION_TEST
? LOG_INFO
: LOG_DEBUG
,
1756 "Loaded units and determined initial transaction in %s.",
1757 format_timespan(timespan
, sizeof(timespan
), after_startup
- before_startup
, 100 * USEC_PER_MSEC
));
1759 if (arg_action
== ACTION_TEST
) {
1760 printf("-> By jobs:\n");
1761 manager_dump_jobs(m
, stdout
, "\t");
1762 retval
= EXIT_SUCCESS
;
1768 r
= manager_loop(m
);
1770 log_emergency_errno(r
, "Failed to run main loop: %m");
1771 error_message
= "Failed to run main loop";
1775 switch (m
->exit_code
) {
1777 case MANAGER_RELOAD
:
1778 log_info("Reloading.");
1780 r
= parse_config_file();
1782 log_error("Failed to parse config file.");
1784 manager_set_defaults(m
);
1786 r
= manager_reload(m
);
1788 log_error_errno(r
, "Failed to reload: %m");
1791 case MANAGER_REEXECUTE
:
1793 if (prepare_reexecute(m
, &arg_serialization
, &fds
, false) < 0) {
1794 error_message
= "Failed to prepare for reexecution";
1799 log_notice("Reexecuting.");
1802 case MANAGER_SWITCH_ROOT
:
1803 /* Steal the switch root parameters */
1804 switch_root_dir
= m
->switch_root
;
1805 switch_root_init
= m
->switch_root_init
;
1806 m
->switch_root
= m
->switch_root_init
= NULL
;
1808 if (!switch_root_init
)
1809 if (prepare_reexecute(m
, &arg_serialization
, &fds
, true) < 0) {
1810 error_message
= "Failed to prepare for reexecution";
1815 log_notice("Switching root.");
1819 retval
= m
->return_value
;
1821 if (m
->running_as
== MANAGER_USER
) {
1827 case MANAGER_REBOOT
:
1828 case MANAGER_POWEROFF
:
1830 case MANAGER_KEXEC
: {
1831 static const char * const table
[_MANAGER_EXIT_CODE_MAX
] = {
1832 [MANAGER_EXIT
] = "exit",
1833 [MANAGER_REBOOT
] = "reboot",
1834 [MANAGER_POWEROFF
] = "poweroff",
1835 [MANAGER_HALT
] = "halt",
1836 [MANAGER_KEXEC
] = "kexec"
1839 assert_se(shutdown_verb
= table
[m
->exit_code
]);
1840 arm_reboot_watchdog
= m
->exit_code
== MANAGER_REBOOT
;
1842 log_notice("Shutting down.");
1847 assert_not_reached("Unknown exit code.");
1855 arg_shutdown_watchdog
= m
->shutdown_watchdog
;
1857 m
= manager_free(m
);
1859 for (j
= 0; j
< ELEMENTSOF(arg_default_rlimit
); j
++)
1860 arg_default_rlimit
[j
] = mfree(arg_default_rlimit
[j
]);
1862 arg_default_unit
= mfree(arg_default_unit
);
1863 arg_join_controllers
= strv_free_free(arg_join_controllers
);
1864 arg_default_environment
= strv_free(arg_default_environment
);
1865 arg_syscall_archs
= set_free(arg_syscall_archs
);
1867 mac_selinux_finish();
1871 unsigned i
, args_size
;
1873 /* Close and disarm the watchdog, so that the new
1874 * instance can reinitialize it, but doesn't get
1875 * rebooted while we do that */
1876 watchdog_close(true);
1878 /* Reset the RLIMIT_NOFILE to the kernel default, so
1879 * that the new systemd can pass the kernel default to
1880 * its child processes */
1881 if (saved_rlimit_nofile
.rlim_cur
> 0)
1882 (void) setrlimit(RLIMIT_NOFILE
, &saved_rlimit_nofile
);
1884 if (switch_root_dir
) {
1885 /* Kill all remaining processes from the
1886 * initrd, but don't wait for them, so that we
1887 * can handle the SIGCHLD for them after
1889 broadcast_signal(SIGTERM
, false, true);
1891 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1892 r
= switch_root(switch_root_dir
, "/mnt", true, MS_MOVE
);
1894 log_error_errno(r
, "Failed to switch root, trying to continue: %m");
1897 args_size
= MAX(6, argc
+1);
1898 args
= newa(const char*, args_size
);
1900 if (!switch_root_init
) {
1901 char sfd
[DECIMAL_STR_MAX(int) + 1];
1903 /* First try to spawn ourselves with the right
1904 * path, and with full serialization. We do
1905 * this only if the user didn't specify an
1906 * explicit init to spawn. */
1908 assert(arg_serialization
);
1911 xsprintf(sfd
, "%i", fileno(arg_serialization
));
1914 args
[i
++] = SYSTEMD_BINARY_PATH
;
1915 if (switch_root_dir
)
1916 args
[i
++] = "--switched-root";
1917 args
[i
++] = arg_running_as
== MANAGER_SYSTEM
? "--system" : "--user";
1918 args
[i
++] = "--deserialize";
1922 /* do not pass along the environment we inherit from the kernel or initrd */
1923 if (switch_root_dir
)
1926 assert(i
<= args_size
);
1927 (void) execv(args
[0], (char* const*) args
);
1930 /* Try the fallback, if there is any, without any
1931 * serialization. We pass the original argv[] and
1932 * envp[]. (Well, modulo the ordering changes due to
1933 * getopt() in argv[], and some cleanups in envp[],
1934 * but let's hope that doesn't matter.) */
1936 arg_serialization
= safe_fclose(arg_serialization
);
1937 fds
= fdset_free(fds
);
1939 /* Reopen the console */
1940 (void) make_console_stdio();
1942 for (j
= 1, i
= 1; j
< (unsigned) argc
; j
++)
1943 args
[i
++] = argv
[j
];
1945 assert(i
<= args_size
);
1947 /* Reenable any blocked signals, especially important
1948 * if we switch from initial ramdisk to init=... */
1949 (void) reset_all_signal_handlers();
1950 (void) reset_signal_mask();
1952 if (switch_root_init
) {
1953 args
[0] = switch_root_init
;
1954 (void) execv(args
[0], (char* const*) args
);
1955 log_warning_errno(errno
, "Failed to execute configured init, trying fallback: %m");
1958 args
[0] = "/sbin/init";
1959 (void) execv(args
[0], (char* const*) args
);
1961 if (errno
== ENOENT
) {
1962 log_warning("No /sbin/init, trying fallback");
1964 args
[0] = "/bin/sh";
1966 (void) execv(args
[0], (char* const*) args
);
1967 log_error_errno(errno
, "Failed to execute /bin/sh, giving up: %m");
1969 log_warning_errno(errno
, "Failed to execute /sbin/init, giving up: %m");
1972 arg_serialization
= safe_fclose(arg_serialization
);
1973 fds
= fdset_free(fds
);
1975 #ifdef HAVE_VALGRIND_VALGRIND_H
1976 /* If we are PID 1 and running under valgrind, then let's exit
1977 * here explicitly. valgrind will only generate nice output on
1978 * exit(), not on exec(), hence let's do the former not the
1980 if (getpid() == 1 && RUNNING_ON_VALGRIND
)
1984 if (shutdown_verb
) {
1985 char log_level
[DECIMAL_STR_MAX(int) + 1];
1986 char exit_code
[DECIMAL_STR_MAX(uint8_t) + 1];
1987 const char* command_line
[11] = {
1988 SYSTEMD_SHUTDOWN_BINARY_PATH
,
1990 "--log-level", log_level
,
1994 _cleanup_strv_free_
char **env_block
= NULL
;
1996 assert(command_line
[pos
] == NULL
);
1997 env_block
= strv_copy(environ
);
1999 xsprintf(log_level
, "%d", log_get_max_level());
2001 switch (log_get_target()) {
2003 case LOG_TARGET_KMSG
:
2004 case LOG_TARGET_JOURNAL_OR_KMSG
:
2005 case LOG_TARGET_SYSLOG_OR_KMSG
:
2006 command_line
[pos
++] = "kmsg";
2009 case LOG_TARGET_NULL
:
2010 command_line
[pos
++] = "null";
2013 case LOG_TARGET_CONSOLE
:
2015 command_line
[pos
++] = "console";
2019 if (log_get_show_color())
2020 command_line
[pos
++] = "--log-color";
2022 if (log_get_show_location())
2023 command_line
[pos
++] = "--log-location";
2025 if (streq(shutdown_verb
, "exit")) {
2026 command_line
[pos
++] = "--exit-code";
2027 command_line
[pos
++] = exit_code
;
2028 xsprintf(exit_code
, "%d", retval
);
2031 assert(pos
< ELEMENTSOF(command_line
));
2033 if (arm_reboot_watchdog
&& arg_shutdown_watchdog
> 0) {
2036 /* If we reboot let's set the shutdown
2037 * watchdog and tell the shutdown binary to
2038 * repeatedly ping it */
2039 r
= watchdog_set_timeout(&arg_shutdown_watchdog
);
2040 watchdog_close(r
< 0);
2042 /* Tell the binary how often to ping, ignore failure */
2043 if (asprintf(&e
, "WATCHDOG_USEC="USEC_FMT
, arg_shutdown_watchdog
) > 0)
2044 (void) strv_push(&env_block
, e
);
2046 watchdog_close(true);
2048 /* Avoid the creation of new processes forked by the
2049 * kernel; at this point, we will not listen to the
2051 if (detect_container() <= 0)
2052 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER
);
2054 execve(SYSTEMD_SHUTDOWN_BINARY_PATH
, (char **) command_line
, env_block
);
2055 log_error_errno(errno
, "Failed to execute shutdown binary, %s: %m",
2056 getpid() == 1 ? "freezing" : "quitting");
2059 if (getpid() == 1) {
2061 manager_status_printf(NULL
, STATUS_TYPE_EMERGENCY
,
2062 ANSI_HIGHLIGHT_RED
"!!!!!!" ANSI_NORMAL
,
2063 "%s, freezing.", error_message
);