2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/mount.h>
27 #include <sys/prctl.h>
28 #include <sys/reboot.h>
34 #ifdef HAVE_VALGRIND_VALGRIND_H
35 #include <valgrind/valgrind.h>
39 #include "sd-daemon.h"
41 #include "alloc-util.h"
42 #include "architecture.h"
44 #include "bus-error.h"
46 #include "capability-util.h"
47 #include "clock-util.h"
48 #include "conf-parser.h"
49 #include "cpu-set-util.h"
50 #include "dbus-manager.h"
56 #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 "parse-util.h"
71 #include "proc-cmdline.h"
72 #include "process-util.h"
73 #include "raw-clone.h"
74 #include "rlimit-util.h"
75 #include "selinux-setup.h"
76 #include "selinux-util.h"
77 #include "signal-util.h"
78 #include "smack-setup.h"
80 #include "stat-util.h"
81 #include "stdio-util.h"
83 #include "switch-root.h"
84 #include "terminal-util.h"
85 #include "umask-util.h"
86 #include "user-util.h"
95 ACTION_DUMP_CONFIGURATION_ITEMS
,
97 } arg_action
= ACTION_RUN
;
98 static char *arg_default_unit
= NULL
;
99 static bool arg_system
= false;
100 static bool arg_dump_core
= true;
101 static int arg_crash_chvt
= -1;
102 static bool arg_crash_shell
= false;
103 static bool arg_crash_reboot
= false;
104 static bool arg_confirm_spawn
= false;
105 static ShowStatus arg_show_status
= _SHOW_STATUS_UNSET
;
106 static bool arg_switched_root
= false;
107 static bool arg_no_pager
= false;
108 static char ***arg_join_controllers
= NULL
;
109 static ExecOutput arg_default_std_output
= EXEC_OUTPUT_JOURNAL
;
110 static ExecOutput arg_default_std_error
= EXEC_OUTPUT_INHERIT
;
111 static usec_t arg_default_restart_usec
= DEFAULT_RESTART_USEC
;
112 static usec_t arg_default_timeout_start_usec
= DEFAULT_TIMEOUT_USEC
;
113 static usec_t arg_default_timeout_stop_usec
= DEFAULT_TIMEOUT_USEC
;
114 static usec_t arg_default_start_limit_interval
= DEFAULT_START_LIMIT_INTERVAL
;
115 static unsigned arg_default_start_limit_burst
= DEFAULT_START_LIMIT_BURST
;
116 static usec_t arg_runtime_watchdog
= 0;
117 static usec_t arg_shutdown_watchdog
= 10 * USEC_PER_MINUTE
;
118 static char **arg_default_environment
= NULL
;
119 static struct rlimit
*arg_default_rlimit
[_RLIMIT_MAX
] = {};
120 static uint64_t arg_capability_bounding_set
= CAP_ALL
;
121 static nsec_t arg_timer_slack_nsec
= NSEC_INFINITY
;
122 static usec_t arg_default_timer_accuracy_usec
= 1 * USEC_PER_MINUTE
;
123 static Set
* arg_syscall_archs
= NULL
;
124 static FILE* arg_serialization
= NULL
;
125 static bool arg_default_cpu_accounting
= false;
126 static bool arg_default_io_accounting
= false;
127 static bool arg_default_blockio_accounting
= false;
128 static bool arg_default_memory_accounting
= false;
129 static bool arg_default_tasks_accounting
= true;
130 static uint64_t arg_default_tasks_max
= UINT64_MAX
;
131 static sd_id128_t arg_machine_id
= {};
133 noreturn
static void freeze_or_reboot(void) {
135 if (arg_crash_reboot
) {
136 log_notice("Rebooting in 10s...");
139 log_notice("Rebooting now...");
140 (void) reboot(RB_AUTOBOOT
);
141 log_emergency_errno(errno
, "Failed to reboot: %m");
144 log_emergency("Freezing execution.");
148 noreturn
static void crash(int sig
) {
153 /* Pass this on immediately, if this is not PID 1 */
155 else if (!arg_dump_core
)
156 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig
));
158 sa
= (struct sigaction
) {
159 .sa_handler
= nop_signal_handler
,
160 .sa_flags
= SA_NOCLDSTOP
|SA_RESTART
,
163 /* We want to wait for the core process, hence let's enable SIGCHLD */
164 (void) sigaction(SIGCHLD
, &sa
, NULL
);
166 pid
= raw_clone(SIGCHLD
);
168 log_emergency_errno(errno
, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig
));
170 /* Enable default signal handler for core dump */
172 sa
= (struct sigaction
) {
173 .sa_handler
= SIG_DFL
,
175 (void) sigaction(sig
, &sa
, NULL
);
177 /* Don't limit the coredump size */
178 (void) setrlimit(RLIMIT_CORE
, &RLIMIT_MAKE_CONST(RLIM_INFINITY
));
180 /* Just to be sure... */
183 /* Raise the signal again */
185 (void) kill(pid
, sig
); /* raise() would kill the parent */
187 assert_not_reached("We shouldn't be here...");
193 /* Order things nicely. */
194 r
= wait_for_terminate(pid
, &status
);
196 log_emergency_errno(r
, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig
));
197 else if (status
.si_code
!= CLD_DUMPED
)
198 log_emergency("Caught <%s>, core dump failed (child "PID_FMT
", code=%s, status=%i/%s).",
199 signal_to_string(sig
),
200 pid
, sigchld_code_to_string(status
.si_code
),
202 strna(status
.si_code
== CLD_EXITED
203 ? exit_status_to_string(status
.si_status
, EXIT_STATUS_FULL
)
204 : signal_to_string(status
.si_status
)));
206 log_emergency("Caught <%s>, dumped core as pid "PID_FMT
".", signal_to_string(sig
), pid
);
210 if (arg_crash_chvt
>= 0)
211 (void) chvt(arg_crash_chvt
);
213 sa
= (struct sigaction
) {
214 .sa_handler
= SIG_IGN
,
215 .sa_flags
= SA_NOCLDSTOP
|SA_NOCLDWAIT
|SA_RESTART
,
218 /* Let the kernel reap children for us */
219 (void) sigaction(SIGCHLD
, &sa
, NULL
);
221 if (arg_crash_shell
) {
222 log_notice("Executing crash shell in 10s...");
225 pid
= raw_clone(SIGCHLD
);
227 log_emergency_errno(errno
, "Failed to fork off crash shell: %m");
230 (void) make_console_stdio();
231 (void) execle("/bin/sh", "/bin/sh", NULL
, environ
);
233 log_emergency_errno(errno
, "execle() failed: %m");
236 log_info("Spawned crash shell as PID "PID_FMT
".", pid
);
237 (void) wait_for_terminate(pid
, NULL
);
244 static void install_crash_handler(void) {
245 static const struct sigaction sa
= {
247 .sa_flags
= SA_NODEFER
, /* So that we can raise the signal again from the signal handler */
251 /* We ignore the return value here, since, we don't mind if we
252 * cannot set up a crash handler */
253 r
= sigaction_many(&sa
, SIGNALS_CRASH_HANDLER
, -1);
255 log_debug_errno(r
, "I had trouble setting up the crash handler, ignoring: %m");
258 static int console_setup(void) {
259 _cleanup_close_
int tty_fd
= -1;
262 tty_fd
= open_terminal("/dev/console", O_WRONLY
|O_NOCTTY
|O_CLOEXEC
);
264 return log_error_errno(tty_fd
, "Failed to open /dev/console: %m");
266 /* We don't want to force text mode. plymouth may be showing
267 * pictures already from initrd. */
268 r
= reset_terminal_fd(tty_fd
, false);
270 return log_error_errno(r
, "Failed to reset /dev/console: %m");
275 static int parse_crash_chvt(const char *value
) {
278 if (safe_atoi(value
, &arg_crash_chvt
) >= 0)
281 b
= parse_boolean(value
);
286 arg_crash_chvt
= 0; /* switch to where kmsg goes */
288 arg_crash_chvt
= -1; /* turn off switching */
293 static int set_machine_id(const char *m
) {
296 if (sd_id128_from_string(m
, &arg_machine_id
) < 0)
299 if (sd_id128_is_null(arg_machine_id
))
305 static int parse_proc_cmdline_item(const char *key
, const char *value
) {
311 if (streq(key
, "systemd.unit") && value
) {
314 return free_and_strdup(&arg_default_unit
, value
);
316 } else if (streq(key
, "rd.systemd.unit") && value
) {
319 return free_and_strdup(&arg_default_unit
, value
);
321 } else if (streq(key
, "systemd.dump_core") && value
) {
323 r
= parse_boolean(value
);
325 log_warning("Failed to parse dump core switch %s. Ignoring.", value
);
329 } else if (streq(key
, "systemd.crash_chvt") && value
) {
331 if (parse_crash_chvt(value
) < 0)
332 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value
);
334 } else if (streq(key
, "systemd.crash_shell") && value
) {
336 r
= parse_boolean(value
);
338 log_warning("Failed to parse crash shell switch %s. Ignoring.", value
);
342 } else if (streq(key
, "systemd.crash_reboot") && value
) {
344 r
= parse_boolean(value
);
346 log_warning("Failed to parse crash reboot switch %s. Ignoring.", value
);
348 arg_crash_reboot
= r
;
350 } else if (streq(key
, "systemd.confirm_spawn") && value
) {
352 r
= parse_boolean(value
);
354 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value
);
356 arg_confirm_spawn
= r
;
358 } else if (streq(key
, "systemd.show_status") && value
) {
360 r
= parse_show_status(value
, &arg_show_status
);
362 log_warning("Failed to parse show status switch %s. Ignoring.", value
);
364 } else if (streq(key
, "systemd.default_standard_output") && value
) {
366 r
= exec_output_from_string(value
);
368 log_warning("Failed to parse default standard output switch %s. Ignoring.", value
);
370 arg_default_std_output
= r
;
372 } else if (streq(key
, "systemd.default_standard_error") && value
) {
374 r
= exec_output_from_string(value
);
376 log_warning("Failed to parse default standard error switch %s. Ignoring.", value
);
378 arg_default_std_error
= r
;
380 } else if (streq(key
, "systemd.setenv") && value
) {
382 if (env_assignment_is_valid(value
)) {
385 env
= strv_env_set(arg_default_environment
, value
);
387 arg_default_environment
= env
;
389 log_warning_errno(ENOMEM
, "Setting environment variable '%s' failed, ignoring: %m", value
);
391 log_warning("Environment variable name '%s' is not valid. Ignoring.", value
);
393 } else if (streq(key
, "systemd.machine_id") && value
) {
395 r
= set_machine_id(value
);
397 log_warning("MachineID '%s' is not valid. Ignoring.", value
);
399 } else if (streq(key
, "quiet") && !value
) {
401 if (arg_show_status
== _SHOW_STATUS_UNSET
)
402 arg_show_status
= SHOW_STATUS_AUTO
;
404 } else if (streq(key
, "debug") && !value
) {
406 /* Note that log_parse_environment() handles 'debug'
407 * too, and sets the log level to LOG_DEBUG. */
409 if (detect_container() > 0)
410 log_set_target(LOG_TARGET_CONSOLE
);
415 /* SysV compatibility */
416 target
= runlevel_to_target(key
);
418 return free_and_strdup(&arg_default_unit
, target
);
420 } else if (streq(key
, "systemd.default_timeout_start_sec") && value
) {
422 r
= parse_sec(value
, &arg_default_timeout_start_usec
);
424 log_warning_errno(r
, "Failed to parse default start timeout: %s, ignoring.", value
);
426 if (arg_default_timeout_start_usec
<= 0)
427 arg_default_timeout_start_usec
= USEC_INFINITY
;
433 #define DEFINE_SETTER(name, func, descr) \
434 static int name(const char *unit, \
435 const char *filename, \
437 const char *section, \
438 unsigned section_line, \
439 const char *lvalue, \
441 const char *rvalue, \
453 log_syntax(unit, LOG_ERR, filename, line, r, \
454 "Invalid " descr "'%s': %m", \
460 DEFINE_SETTER(config_parse_level2
, log_set_max_level_from_string
, "log level")
461 DEFINE_SETTER(config_parse_target
, log_set_target_from_string
, "target")
462 DEFINE_SETTER(config_parse_color
, log_show_color_from_string
, "color" )
463 DEFINE_SETTER(config_parse_location
, log_show_location_from_string
, "location")
465 static int config_parse_cpu_affinity2(
467 const char *filename
,
470 unsigned section_line
,
477 _cleanup_cpu_free_ cpu_set_t
*c
= NULL
;
480 ncpus
= parse_cpu_set_and_warn(rvalue
, &c
, unit
, filename
, line
, lvalue
);
484 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus
), c
) < 0)
485 log_warning("Failed to set CPU affinity: %m");
490 static int config_parse_show_status(
492 const char *filename
,
495 unsigned section_line
,
503 ShowStatus
*b
= data
;
510 k
= parse_show_status(rvalue
, b
);
512 log_syntax(unit
, LOG_ERR
, filename
, line
, k
, "Failed to parse show status setting, ignoring: %s", rvalue
);
519 static int config_parse_crash_chvt(
521 const char *filename
,
524 unsigned section_line
,
537 r
= parse_crash_chvt(rvalue
);
539 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse CrashChangeVT= setting, ignoring: %s", rvalue
);
546 static int config_parse_join_controllers(const char *unit
,
547 const char *filename
,
550 unsigned section_line
,
557 const char *whole_rvalue
= rvalue
;
564 arg_join_controllers
= strv_free_free(arg_join_controllers
);
567 _cleanup_free_
char *word
= NULL
;
571 r
= extract_first_word(&rvalue
, &word
, WHITESPACE
, EXTRACT_QUOTES
);
573 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Invalid value for %s: %s", lvalue
, whole_rvalue
);
579 l
= strv_split(word
, ",");
584 if (strv_length(l
) <= 1) {
589 if (!arg_join_controllers
) {
590 arg_join_controllers
= new(char**, 2);
591 if (!arg_join_controllers
) {
596 arg_join_controllers
[0] = l
;
597 arg_join_controllers
[1] = NULL
;
604 t
= new0(char**, n
+2);
612 for (a
= arg_join_controllers
; *a
; a
++) {
614 if (strv_overlap(*a
, l
)) {
615 if (strv_extend_strv(&l
, *a
, false) < 0) {
635 t
[n
++] = strv_uniq(l
);
637 strv_free_free(arg_join_controllers
);
638 arg_join_controllers
= t
;
641 if (!isempty(rvalue
))
642 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Trailing garbage, ignoring.");
647 static int parse_config_file(void) {
649 const ConfigTableItem items
[] = {
650 { "Manager", "LogLevel", config_parse_level2
, 0, NULL
},
651 { "Manager", "LogTarget", config_parse_target
, 0, NULL
},
652 { "Manager", "LogColor", config_parse_color
, 0, NULL
},
653 { "Manager", "LogLocation", config_parse_location
, 0, NULL
},
654 { "Manager", "DumpCore", config_parse_bool
, 0, &arg_dump_core
},
655 { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt
, 0, NULL
},
656 { "Manager", "CrashChangeVT", config_parse_crash_chvt
, 0, NULL
},
657 { "Manager", "CrashShell", config_parse_bool
, 0, &arg_crash_shell
},
658 { "Manager", "CrashReboot", config_parse_bool
, 0, &arg_crash_reboot
},
659 { "Manager", "ShowStatus", config_parse_show_status
, 0, &arg_show_status
},
660 { "Manager", "CPUAffinity", config_parse_cpu_affinity2
, 0, NULL
},
661 { "Manager", "JoinControllers", config_parse_join_controllers
, 0, &arg_join_controllers
},
662 { "Manager", "RuntimeWatchdogSec", config_parse_sec
, 0, &arg_runtime_watchdog
},
663 { "Manager", "ShutdownWatchdogSec", config_parse_sec
, 0, &arg_shutdown_watchdog
},
664 { "Manager", "CapabilityBoundingSet", config_parse_capability_set
, 0, &arg_capability_bounding_set
},
666 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs
, 0, &arg_syscall_archs
},
668 { "Manager", "TimerSlackNSec", config_parse_nsec
, 0, &arg_timer_slack_nsec
},
669 { "Manager", "DefaultTimerAccuracySec", config_parse_sec
, 0, &arg_default_timer_accuracy_usec
},
670 { "Manager", "DefaultStandardOutput", config_parse_output
, 0, &arg_default_std_output
},
671 { "Manager", "DefaultStandardError", config_parse_output
, 0, &arg_default_std_error
},
672 { "Manager", "DefaultTimeoutStartSec", config_parse_sec
, 0, &arg_default_timeout_start_usec
},
673 { "Manager", "DefaultTimeoutStopSec", config_parse_sec
, 0, &arg_default_timeout_stop_usec
},
674 { "Manager", "DefaultRestartSec", config_parse_sec
, 0, &arg_default_restart_usec
},
675 { "Manager", "DefaultStartLimitInterval", config_parse_sec
, 0, &arg_default_start_limit_interval
}, /* obsolete alias */
676 { "Manager", "DefaultStartLimitIntervalSec",config_parse_sec
, 0, &arg_default_start_limit_interval
},
677 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned
, 0, &arg_default_start_limit_burst
},
678 { "Manager", "DefaultEnvironment", config_parse_environ
, 0, &arg_default_environment
},
679 { "Manager", "DefaultLimitCPU", config_parse_limit
, RLIMIT_CPU
, arg_default_rlimit
},
680 { "Manager", "DefaultLimitFSIZE", config_parse_limit
, RLIMIT_FSIZE
, arg_default_rlimit
},
681 { "Manager", "DefaultLimitDATA", config_parse_limit
, RLIMIT_DATA
, arg_default_rlimit
},
682 { "Manager", "DefaultLimitSTACK", config_parse_limit
, RLIMIT_STACK
, arg_default_rlimit
},
683 { "Manager", "DefaultLimitCORE", config_parse_limit
, RLIMIT_CORE
, arg_default_rlimit
},
684 { "Manager", "DefaultLimitRSS", config_parse_limit
, RLIMIT_RSS
, arg_default_rlimit
},
685 { "Manager", "DefaultLimitNOFILE", config_parse_limit
, RLIMIT_NOFILE
, arg_default_rlimit
},
686 { "Manager", "DefaultLimitAS", config_parse_limit
, RLIMIT_AS
, arg_default_rlimit
},
687 { "Manager", "DefaultLimitNPROC", config_parse_limit
, RLIMIT_NPROC
, arg_default_rlimit
},
688 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit
, RLIMIT_MEMLOCK
, arg_default_rlimit
},
689 { "Manager", "DefaultLimitLOCKS", config_parse_limit
, RLIMIT_LOCKS
, arg_default_rlimit
},
690 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit
, RLIMIT_SIGPENDING
, arg_default_rlimit
},
691 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit
, RLIMIT_MSGQUEUE
, arg_default_rlimit
},
692 { "Manager", "DefaultLimitNICE", config_parse_limit
, RLIMIT_NICE
, arg_default_rlimit
},
693 { "Manager", "DefaultLimitRTPRIO", config_parse_limit
, RLIMIT_RTPRIO
, arg_default_rlimit
},
694 { "Manager", "DefaultLimitRTTIME", config_parse_limit
, RLIMIT_RTTIME
, arg_default_rlimit
},
695 { "Manager", "DefaultCPUAccounting", config_parse_bool
, 0, &arg_default_cpu_accounting
},
696 { "Manager", "DefaultIOAccounting", config_parse_bool
, 0, &arg_default_io_accounting
},
697 { "Manager", "DefaultBlockIOAccounting", config_parse_bool
, 0, &arg_default_blockio_accounting
},
698 { "Manager", "DefaultMemoryAccounting", config_parse_bool
, 0, &arg_default_memory_accounting
},
699 { "Manager", "DefaultTasksAccounting", config_parse_bool
, 0, &arg_default_tasks_accounting
},
700 { "Manager", "DefaultTasksMax", config_parse_tasks_max
, 0, &arg_default_tasks_max
},
704 const char *fn
, *conf_dirs_nulstr
;
707 PKGSYSCONFDIR
"/system.conf" :
708 PKGSYSCONFDIR
"/user.conf";
710 conf_dirs_nulstr
= arg_system
?
711 CONF_PATHS_NULSTR("systemd/system.conf.d") :
712 CONF_PATHS_NULSTR("systemd/user.conf.d");
714 config_parse_many(fn
, conf_dirs_nulstr
, "Manager\0", config_item_table_lookup
, items
, false, NULL
);
716 /* Traditionally "0" was used to turn off the default unit timeouts. Fix this up so that we used USEC_INFINITY
717 * like everywhere else. */
718 if (arg_default_timeout_start_usec
<= 0)
719 arg_default_timeout_start_usec
= USEC_INFINITY
;
720 if (arg_default_timeout_stop_usec
<= 0)
721 arg_default_timeout_stop_usec
= USEC_INFINITY
;
726 static void manager_set_defaults(Manager
*m
) {
730 m
->default_timer_accuracy_usec
= arg_default_timer_accuracy_usec
;
731 m
->default_std_output
= arg_default_std_output
;
732 m
->default_std_error
= arg_default_std_error
;
733 m
->default_timeout_start_usec
= arg_default_timeout_start_usec
;
734 m
->default_timeout_stop_usec
= arg_default_timeout_stop_usec
;
735 m
->default_restart_usec
= arg_default_restart_usec
;
736 m
->default_start_limit_interval
= arg_default_start_limit_interval
;
737 m
->default_start_limit_burst
= arg_default_start_limit_burst
;
738 m
->default_cpu_accounting
= arg_default_cpu_accounting
;
739 m
->default_io_accounting
= arg_default_io_accounting
;
740 m
->default_blockio_accounting
= arg_default_blockio_accounting
;
741 m
->default_memory_accounting
= arg_default_memory_accounting
;
742 m
->default_tasks_accounting
= arg_default_tasks_accounting
;
743 m
->default_tasks_max
= arg_default_tasks_max
;
745 manager_set_default_rlimits(m
, arg_default_rlimit
);
746 manager_environment_add(m
, NULL
, arg_default_environment
);
749 static int parse_argv(int argc
, char *argv
[]) {
752 ARG_LOG_LEVEL
= 0x100,
762 ARG_DUMP_CONFIGURATION_ITEMS
,
771 ARG_DEFAULT_STD_OUTPUT
,
772 ARG_DEFAULT_STD_ERROR
,
776 static const struct option options
[] = {
777 { "log-level", required_argument
, NULL
, ARG_LOG_LEVEL
},
778 { "log-target", required_argument
, NULL
, ARG_LOG_TARGET
},
779 { "log-color", optional_argument
, NULL
, ARG_LOG_COLOR
},
780 { "log-location", optional_argument
, NULL
, ARG_LOG_LOCATION
},
781 { "unit", required_argument
, NULL
, ARG_UNIT
},
782 { "system", no_argument
, NULL
, ARG_SYSTEM
},
783 { "user", no_argument
, NULL
, ARG_USER
},
784 { "test", no_argument
, NULL
, ARG_TEST
},
785 { "no-pager", no_argument
, NULL
, ARG_NO_PAGER
},
786 { "help", no_argument
, NULL
, 'h' },
787 { "version", no_argument
, NULL
, ARG_VERSION
},
788 { "dump-configuration-items", no_argument
, NULL
, ARG_DUMP_CONFIGURATION_ITEMS
},
789 { "dump-core", optional_argument
, NULL
, ARG_DUMP_CORE
},
790 { "crash-chvt", required_argument
, NULL
, ARG_CRASH_CHVT
},
791 { "crash-shell", optional_argument
, NULL
, ARG_CRASH_SHELL
},
792 { "crash-reboot", optional_argument
, NULL
, ARG_CRASH_REBOOT
},
793 { "confirm-spawn", optional_argument
, NULL
, ARG_CONFIRM_SPAWN
},
794 { "show-status", optional_argument
, NULL
, ARG_SHOW_STATUS
},
795 { "deserialize", required_argument
, NULL
, ARG_DESERIALIZE
},
796 { "switched-root", no_argument
, NULL
, ARG_SWITCHED_ROOT
},
797 { "default-standard-output", required_argument
, NULL
, ARG_DEFAULT_STD_OUTPUT
, },
798 { "default-standard-error", required_argument
, NULL
, ARG_DEFAULT_STD_ERROR
, },
799 { "machine-id", required_argument
, NULL
, ARG_MACHINE_ID
},
811 while ((c
= getopt_long(argc
, argv
, "hDbsz:", options
, NULL
)) >= 0)
816 r
= log_set_max_level_from_string(optarg
);
818 log_error("Failed to parse log level %s.", optarg
);
825 r
= log_set_target_from_string(optarg
);
827 log_error("Failed to parse log target %s.", optarg
);
836 r
= log_show_color_from_string(optarg
);
838 log_error("Failed to parse log color setting %s.", optarg
);
842 log_show_color(true);
846 case ARG_LOG_LOCATION
:
848 r
= log_show_location_from_string(optarg
);
850 log_error("Failed to parse log location setting %s.", optarg
);
854 log_show_location(true);
858 case ARG_DEFAULT_STD_OUTPUT
:
859 r
= exec_output_from_string(optarg
);
861 log_error("Failed to parse default standard output setting %s.", optarg
);
864 arg_default_std_output
= r
;
867 case ARG_DEFAULT_STD_ERROR
:
868 r
= exec_output_from_string(optarg
);
870 log_error("Failed to parse default standard error output setting %s.", optarg
);
873 arg_default_std_error
= r
;
878 r
= free_and_strdup(&arg_default_unit
, optarg
);
880 return log_error_errno(r
, "Failed to set default unit %s: %m", optarg
);
893 arg_action
= ACTION_TEST
;
901 arg_action
= ACTION_VERSION
;
904 case ARG_DUMP_CONFIGURATION_ITEMS
:
905 arg_action
= ACTION_DUMP_CONFIGURATION_ITEMS
;
910 arg_dump_core
= true;
912 r
= parse_boolean(optarg
);
914 return log_error_errno(r
, "Failed to parse dump core boolean: %s", optarg
);
920 r
= parse_crash_chvt(optarg
);
922 return log_error_errno(r
, "Failed to parse crash virtual terminal index: %s", optarg
);
925 case ARG_CRASH_SHELL
:
927 arg_crash_shell
= true;
929 r
= parse_boolean(optarg
);
931 return log_error_errno(r
, "Failed to parse crash shell boolean: %s", optarg
);
936 case ARG_CRASH_REBOOT
:
938 arg_crash_reboot
= true;
940 r
= parse_boolean(optarg
);
942 return log_error_errno(r
, "Failed to parse crash shell boolean: %s", optarg
);
943 arg_crash_reboot
= r
;
947 case ARG_CONFIRM_SPAWN
:
948 r
= optarg
? parse_boolean(optarg
) : 1;
950 log_error("Failed to parse confirm spawn boolean %s.", optarg
);
953 arg_confirm_spawn
= r
;
956 case ARG_SHOW_STATUS
:
958 r
= parse_show_status(optarg
, &arg_show_status
);
960 log_error("Failed to parse show status boolean %s.", optarg
);
964 arg_show_status
= SHOW_STATUS_YES
;
967 case ARG_DESERIALIZE
: {
971 r
= safe_atoi(optarg
, &fd
);
972 if (r
< 0 || fd
< 0) {
973 log_error("Failed to parse deserialize option %s.", optarg
);
977 (void) fd_cloexec(fd
, true);
981 return log_error_errno(errno
, "Failed to open serialization fd: %m");
983 safe_fclose(arg_serialization
);
984 arg_serialization
= f
;
989 case ARG_SWITCHED_ROOT
:
990 arg_switched_root
= true;
994 r
= set_machine_id(optarg
);
996 log_error("MachineID '%s' is not valid.", optarg
);
1002 arg_action
= ACTION_HELP
;
1006 log_set_max_level(LOG_DEBUG
);
1012 /* Just to eat away the sysvinit kernel
1013 * cmdline args without getopt() error
1014 * messages that we'll parse in
1015 * parse_proc_cmdline_word() or ignore. */
1024 assert_not_reached("Unhandled option code.");
1027 if (optind
< argc
&& getpid() != 1) {
1028 /* Hmm, when we aren't run as init system
1029 * let's complain about excess arguments */
1031 log_error("Excess arguments.");
1038 static int help(void) {
1040 printf("%s [OPTIONS...]\n\n"
1041 "Starts up and maintains the system or user services.\n\n"
1042 " -h --help Show this help\n"
1043 " --test Determine startup sequence, dump it and exit\n"
1044 " --no-pager Do not pipe output into a pager\n"
1045 " --dump-configuration-items Dump understood unit configuration items\n"
1046 " --unit=UNIT Set default unit\n"
1047 " --system Run a system instance, even if PID != 1\n"
1048 " --user Run a user instance\n"
1049 " --dump-core[=BOOL] Dump core on crash\n"
1050 " --crash-vt=NR Change to specified VT on crash\n"
1051 " --crash-reboot[=BOOL] Reboot on crash\n"
1052 " --crash-shell[=BOOL] Run shell on crash\n"
1053 " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n"
1054 " --show-status[=BOOL] Show status updates on the console during bootup\n"
1055 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
1056 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1057 " --log-color[=BOOL] Highlight important log messages\n"
1058 " --log-location[=BOOL] Include code location in log messages\n"
1059 " --default-standard-output= Set default standard output for services\n"
1060 " --default-standard-error= Set default standard error output for services\n",
1061 program_invocation_short_name
);
1066 static int prepare_reexecute(Manager
*m
, FILE **_f
, FDSet
**_fds
, bool switching_root
) {
1067 _cleanup_fdset_free_ FDSet
*fds
= NULL
;
1068 _cleanup_fclose_
FILE *f
= NULL
;
1075 r
= manager_open_serialization(m
, &f
);
1077 return log_error_errno(r
, "Failed to create serialization file: %m");
1079 /* Make sure nothing is really destructed when we shut down */
1081 bus_manager_send_reloading(m
, true);
1087 r
= manager_serialize(m
, f
, fds
, switching_root
);
1089 return log_error_errno(r
, "Failed to serialize state: %m");
1091 if (fseeko(f
, 0, SEEK_SET
) == (off_t
) -1)
1092 return log_error_errno(errno
, "Failed to rewind serialization fd: %m");
1094 r
= fd_cloexec(fileno(f
), false);
1096 return log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization: %m");
1098 r
= fdset_cloexec(fds
, false);
1100 return log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization fds: %m");
1111 static int bump_rlimit_nofile(struct rlimit
*saved_rlimit
) {
1115 assert(saved_rlimit
);
1117 /* Save the original RLIMIT_NOFILE so that we can reset it
1118 * later when transitioning from the initrd to the main
1119 * systemd or suchlike. */
1120 if (getrlimit(RLIMIT_NOFILE
, saved_rlimit
) < 0)
1121 return log_error_errno(errno
, "Reading RLIMIT_NOFILE failed: %m");
1123 /* Make sure forked processes get the default kernel setting */
1124 if (!arg_default_rlimit
[RLIMIT_NOFILE
]) {
1127 rl
= newdup(struct rlimit
, saved_rlimit
, 1);
1131 arg_default_rlimit
[RLIMIT_NOFILE
] = rl
;
1134 /* Bump up the resource limit for ourselves substantially */
1135 nl
.rlim_cur
= nl
.rlim_max
= 64*1024;
1136 r
= setrlimit_closest(RLIMIT_NOFILE
, &nl
);
1138 return log_error_errno(r
, "Setting RLIMIT_NOFILE failed: %m");
1143 static void test_usr(void) {
1145 /* Check that /usr is not a separate fs */
1147 if (dir_is_empty("/usr") <= 0)
1150 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1151 "Some things will probably break (sometimes even silently) in mysterious ways. "
1152 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1155 static int initialize_join_controllers(void) {
1156 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1157 * + "net_prio". We'd like to add "cpuset" to the mix, but
1158 * "cpuset" doesn't really work for groups with no initialized
1161 arg_join_controllers
= new(char**, 3);
1162 if (!arg_join_controllers
)
1165 arg_join_controllers
[0] = strv_new("cpu", "cpuacct", NULL
);
1166 if (!arg_join_controllers
[0])
1169 arg_join_controllers
[1] = strv_new("net_cls", "net_prio", NULL
);
1170 if (!arg_join_controllers
[1])
1173 arg_join_controllers
[2] = NULL
;
1177 arg_join_controllers
= strv_free_free(arg_join_controllers
);
1181 static int enforce_syscall_archs(Set
*archs
) {
1183 scmp_filter_ctx
*seccomp
;
1188 seccomp
= seccomp_init(SCMP_ACT_ALLOW
);
1192 SET_FOREACH(id
, arg_syscall_archs
, i
) {
1193 r
= seccomp_arch_add(seccomp
, PTR_TO_UINT32(id
) - 1);
1197 log_error_errno(r
, "Failed to add architecture to seccomp: %m");
1202 r
= seccomp_attr_set(seccomp
, SCMP_FLTATR_CTL_NNP
, 0);
1204 log_error_errno(r
, "Failed to unset NO_NEW_PRIVS: %m");
1208 r
= seccomp_load(seccomp
);
1210 log_error_errno(r
, "Failed to add install architecture seccomp: %m");
1213 seccomp_release(seccomp
);
1220 static int status_welcome(void) {
1221 _cleanup_free_
char *pretty_name
= NULL
, *ansi_color
= NULL
;
1224 r
= parse_env_file("/etc/os-release", NEWLINE
,
1225 "PRETTY_NAME", &pretty_name
,
1226 "ANSI_COLOR", &ansi_color
,
1229 r
= parse_env_file("/usr/lib/os-release", NEWLINE
,
1230 "PRETTY_NAME", &pretty_name
,
1231 "ANSI_COLOR", &ansi_color
,
1234 if (r
< 0 && r
!= -ENOENT
)
1235 log_warning_errno(r
, "Failed to read os-release file: %m");
1237 if (log_get_show_color())
1238 return status_printf(NULL
, false, false,
1239 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1240 isempty(ansi_color
) ? "1" : ansi_color
,
1241 isempty(pretty_name
) ? "Linux" : pretty_name
);
1243 return status_printf(NULL
, false, false,
1244 "\nWelcome to %s!\n",
1245 isempty(pretty_name
) ? "Linux" : pretty_name
);
1248 static int write_container_id(void) {
1252 c
= getenv("container");
1256 RUN_WITH_UMASK(0022)
1257 r
= write_string_file("/run/systemd/container", c
, WRITE_STRING_FILE_CREATE
);
1259 return log_warning_errno(r
, "Failed to write /run/systemd/container, ignoring: %m");
1264 static int bump_unix_max_dgram_qlen(void) {
1265 _cleanup_free_
char *qlen
= NULL
;
1269 /* Let's bump the net.unix.max_dgram_qlen sysctl. The kernel
1270 * default of 16 is simply too low. We set the value really
1271 * really early during boot, so that it is actually applied to
1272 * all our sockets, including the $NOTIFY_SOCKET one. */
1274 r
= read_one_line_file("/proc/sys/net/unix/max_dgram_qlen", &qlen
);
1276 return log_warning_errno(r
, "Failed to read AF_UNIX datagram queue length, ignoring: %m");
1278 r
= safe_atolu(qlen
, &v
);
1280 return log_warning_errno(r
, "Failed to parse AF_UNIX datagram queue length, ignoring: %m");
1282 if (v
>= DEFAULT_UNIX_MAX_DGRAM_QLEN
)
1286 if (asprintf(&qlen
, "%lu\n", DEFAULT_UNIX_MAX_DGRAM_QLEN
) < 0)
1289 r
= write_string_file("/proc/sys/net/unix/max_dgram_qlen", qlen
, 0);
1291 return log_full_errno(IN_SET(r
, -EROFS
, -EPERM
, -EACCES
) ? LOG_DEBUG
: LOG_WARNING
, r
,
1292 "Failed to bump AF_UNIX datagram queue length, ignoring: %m");
1297 static int fixup_environment(void) {
1298 _cleanup_free_
char *term
= NULL
;
1301 /* We expect the environment to be set correctly
1302 * if run inside a container. */
1303 if (detect_container() > 0)
1306 /* When started as PID1, the kernel uses /dev/console
1307 * for our stdios and uses TERM=linux whatever the
1308 * backend device used by the console. We try to make
1309 * a better guess here since some consoles might not
1310 * have support for color mode for example.
1312 * However if TERM was configured through the kernel
1313 * command line then leave it alone. */
1315 r
= get_proc_cmdline_key("TERM=", &term
);
1320 term
= strdup(default_term_for_tty("/dev/console") + 5);
1325 if (setenv("TERM", term
, 1) < 0)
1331 int main(int argc
, char *argv
[]) {
1333 int r
, retval
= EXIT_FAILURE
;
1334 usec_t before_startup
, after_startup
;
1335 char timespan
[FORMAT_TIMESPAN_MAX
];
1337 bool reexecute
= false;
1338 const char *shutdown_verb
= NULL
;
1339 dual_timestamp initrd_timestamp
= DUAL_TIMESTAMP_NULL
;
1340 dual_timestamp userspace_timestamp
= DUAL_TIMESTAMP_NULL
;
1341 dual_timestamp kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
1342 dual_timestamp security_start_timestamp
= DUAL_TIMESTAMP_NULL
;
1343 dual_timestamp security_finish_timestamp
= DUAL_TIMESTAMP_NULL
;
1344 static char systemd
[] = "systemd";
1345 bool skip_setup
= false;
1347 bool loaded_policy
= false;
1348 bool arm_reboot_watchdog
= false;
1349 bool queue_default_job
= false;
1350 bool empty_etc
= false;
1351 char *switch_root_dir
= NULL
, *switch_root_init
= NULL
;
1352 struct rlimit saved_rlimit_nofile
= RLIMIT_MAKE_CONST(0);
1353 const char *error_message
= NULL
;
1355 #ifdef HAVE_SYSV_COMPAT
1356 if (getpid() != 1 && strstr(program_invocation_short_name
, "init")) {
1357 /* This is compatibility support for SysV, where
1358 * calling init as a user is identical to telinit. */
1360 execv(SYSTEMCTL_BINARY_PATH
, argv
);
1361 log_error_errno(errno
, "Failed to exec " SYSTEMCTL_BINARY_PATH
": %m");
1366 dual_timestamp_from_monotonic(&kernel_timestamp
, 0);
1367 dual_timestamp_get(&userspace_timestamp
);
1369 /* Determine if this is a reexecution or normal bootup. We do
1370 * the full command line parsing much later, so let's just
1371 * have a quick peek here. */
1372 if (strv_find(argv
+1, "--deserialize"))
1375 /* If we have switched root, do all the special setup
1377 if (strv_find(argv
+1, "--switched-root"))
1380 /* If we get started via the /sbin/init symlink then we are
1381 called 'init'. After a subsequent reexecution we are then
1382 called 'systemd'. That is confusing, hence let's call us
1383 systemd right-away. */
1384 program_invocation_short_name
= systemd
;
1385 prctl(PR_SET_NAME
, systemd
);
1390 log_set_upgrade_syslog_to_journal(true);
1392 /* Disable the umask logic */
1396 if (getpid() == 1 && detect_container() <= 0) {
1398 /* Running outside of a container as PID 1 */
1400 log_set_target(LOG_TARGET_KMSG
);
1404 initrd_timestamp
= userspace_timestamp
;
1407 r
= mount_setup_early();
1409 error_message
= "Failed to early mount API filesystems";
1412 dual_timestamp_get(&security_start_timestamp
);
1413 if (mac_selinux_setup(&loaded_policy
) < 0) {
1414 error_message
= "Failed to load SELinux policy";
1416 } else if (ima_setup() < 0) {
1417 error_message
= "Failed to load IMA policy";
1419 } else if (mac_smack_setup(&loaded_policy
) < 0) {
1420 error_message
= "Failed to load SMACK policy";
1423 dual_timestamp_get(&security_finish_timestamp
);
1426 if (mac_selinux_init() < 0) {
1427 error_message
= "Failed to initialize SELinux policy";
1432 if (clock_is_localtime(NULL
) > 0) {
1436 * The very first call of settimeofday() also does a time warp in the kernel.
1438 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1439 * external tools to take care of maintaining the RTC and do all adjustments.
1440 * This matches the behavior of Windows, which leaves the RTC alone if the
1441 * registry tells that the RTC runs in UTC.
1443 r
= clock_set_timezone(&min
);
1445 log_error_errno(r
, "Failed to apply local time delta, ignoring: %m");
1447 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min
);
1448 } else if (!in_initrd()) {
1450 * Do a dummy very first call to seal the kernel's time warp magic.
1452 * Do not call this from inside the initrd. The initrd might not
1453 * carry /etc/adjtime with LOCAL, but the real system could be set up
1454 * that way. In such case, we need to delay the time-warp or the sealing
1455 * until we reach the real system.
1457 * Do no set the kernel's timezone. The concept of local time cannot
1458 * be supported reliably, the time will jump or be incorrect at every daylight
1459 * saving time change. All kernel local time concepts will be treated
1462 (void) clock_reset_timewarp();
1465 r
= clock_apply_epoch();
1467 log_error_errno(r
, "Current system time is before build time, but cannot correct: %m");
1469 log_info("System time before build time, advancing clock.");
1472 /* Set the default for later on, but don't actually
1473 * open the logs like this for now. Note that if we
1474 * are transitioning from the initrd there might still
1475 * be journal fd open, and we shouldn't attempt
1476 * opening that before we parsed /proc/cmdline which
1477 * might redirect output elsewhere. */
1478 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG
);
1480 } else if (getpid() == 1) {
1481 /* Running inside a container, as PID 1 */
1483 log_set_target(LOG_TARGET_CONSOLE
);
1484 log_close_console(); /* force reopen of /dev/console */
1487 /* For the later on, see above... */
1488 log_set_target(LOG_TARGET_JOURNAL
);
1490 /* clear the kernel timestamp,
1491 * because we are in a container */
1492 kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
1494 /* Running as user instance */
1496 log_set_target(LOG_TARGET_AUTO
);
1499 /* clear the kernel timestamp,
1500 * because we are not PID 1 */
1501 kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
1504 if (getpid() == 1) {
1505 /* Don't limit the core dump size, so that coredump handlers such as systemd-coredump (which honour the limit)
1506 * will process core dumps for system services by default. */
1507 (void) setrlimit(RLIMIT_CORE
, &RLIMIT_MAKE_CONST(RLIM_INFINITY
));
1509 /* But at the same time, turn off the core_pattern logic by default, so that no coredumps are stored
1510 * until the systemd-coredump tool is enabled via sysctl. */
1512 (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0);
1516 if (fixup_environment() < 0) {
1517 error_message
= "Failed to fix up PID1 environment";
1521 /* Try to figure out if we can use colors with the console. No
1522 * need to do that for user instances since they never log
1523 * into the console. */
1524 log_show_color(colors_enabled());
1528 /* Initialize default unit */
1529 r
= free_and_strdup(&arg_default_unit
, SPECIAL_DEFAULT_TARGET
);
1531 log_emergency_errno(r
, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET
);
1532 error_message
= "Failed to set default unit";
1536 r
= initialize_join_controllers();
1538 error_message
= "Failed to initialize cgroup controllers";
1542 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1543 * /proc/$PID/fd is available. */
1544 if (getpid() == 1) {
1546 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1550 r
= mount_setup(loaded_policy
);
1552 error_message
= "Failed to mount API filesystems";
1557 /* Reset all signal handlers. */
1558 (void) reset_all_signal_handlers();
1559 (void) ignore_signals(SIGNALS_IGNORE
, -1);
1561 arg_default_tasks_max
= system_tasks_max_scale(15U, 100U); /* 15% the system PIDs equals 4915 by default. */
1563 if (parse_config_file() < 0) {
1564 error_message
= "Failed to parse config file";
1569 r
= parse_proc_cmdline(parse_proc_cmdline_item
);
1571 log_warning_errno(r
, "Failed to parse kernel command line, ignoring: %m");
1574 /* Note that this also parses bits from the kernel command
1575 * line, including "debug". */
1576 log_parse_environment();
1578 if (parse_argv(argc
, argv
) < 0) {
1579 error_message
= "Failed to parse commandline arguments";
1583 if (arg_action
== ACTION_TEST
&&
1585 log_error("Don't run test mode as root.");
1590 arg_action
== ACTION_RUN
&&
1592 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1597 arg_action
== ACTION_RUN
&&
1598 running_in_chroot() > 0) {
1599 log_error("Cannot be run in a chroot() environment.");
1603 if (arg_action
== ACTION_TEST
)
1606 if (arg_action
== ACTION_TEST
|| arg_action
== ACTION_HELP
)
1607 pager_open(arg_no_pager
, false);
1609 if (arg_action
== ACTION_HELP
) {
1612 } else if (arg_action
== ACTION_VERSION
) {
1615 } else if (arg_action
== ACTION_DUMP_CONFIGURATION_ITEMS
) {
1616 unit_dump_config_items(stdout
);
1617 retval
= EXIT_SUCCESS
;
1619 } else if (arg_action
== ACTION_DONE
) {
1620 retval
= EXIT_SUCCESS
;
1625 !getenv("XDG_RUNTIME_DIR")) {
1626 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1630 assert_se(arg_action
== ACTION_RUN
|| arg_action
== ACTION_TEST
);
1632 /* Close logging fds, in order not to confuse fdset below */
1635 /* Remember open file descriptors for later deserialization */
1636 r
= fdset_new_fill(&fds
);
1638 log_emergency_errno(r
, "Failed to allocate fd set: %m");
1639 error_message
= "Failed to allocate fd set";
1642 fdset_cloexec(fds
, true);
1644 if (arg_serialization
)
1645 assert_se(fdset_remove(fds
, fileno(arg_serialization
)) >= 0);
1648 /* Become a session leader if we aren't one yet. */
1651 /* Move out of the way, so that we won't block unmounts */
1652 assert_se(chdir("/") == 0);
1654 /* Reset the console, but only if this is really init and we
1655 * are freshly booted */
1656 if (arg_system
&& arg_action
== ACTION_RUN
) {
1658 /* If we are init, we connect stdin/stdout/stderr to
1659 * /dev/null and make sure we don't have a controlling
1663 if (getpid() == 1 && !skip_setup
)
1667 /* Open the logging devices, if possible and necessary */
1670 if (arg_show_status
== _SHOW_STATUS_UNSET
)
1671 arg_show_status
= SHOW_STATUS_YES
;
1673 /* Make sure we leave a core dump without panicing the
1675 if (getpid() == 1) {
1676 install_crash_handler();
1678 r
= mount_cgroup_controllers(arg_join_controllers
);
1686 log_info(PACKAGE_STRING
" running in %ssystem mode. (" SYSTEMD_FEATURES
")",
1687 arg_action
== ACTION_TEST
? "test " : "" );
1689 v
= detect_virtualization();
1691 log_info("Detected virtualization %s.", virtualization_to_string(v
));
1693 write_container_id();
1695 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1698 log_info("Running in initial RAM disk.");
1700 /* Let's check whether /etc is already populated. We
1701 * don't actually really check for that, but use
1702 * /etc/machine-id as flag file. This allows container
1703 * managers and installers to provision a couple of
1704 * files already. If the container manager wants to
1705 * provision the machine ID itself it should pass
1706 * $container_uuid to PID 1. */
1708 empty_etc
= access("/etc/machine-id", F_OK
) < 0;
1710 log_info("Running with unpopulated /etc.");
1712 _cleanup_free_
char *t
;
1714 t
= uid_to_name(getuid());
1715 log_debug(PACKAGE_STRING
" running in %suser mode for user "UID_FMT
"/%s. (" SYSTEMD_FEATURES
")",
1716 arg_action
== ACTION_TEST
? " test" : "", getuid(), t
);
1719 if (arg_system
&& !skip_setup
) {
1720 if (arg_show_status
> 0)
1724 machine_id_setup(NULL
, arg_machine_id
);
1726 bump_unix_max_dgram_qlen();
1731 if (arg_system
&& arg_runtime_watchdog
> 0 && arg_runtime_watchdog
!= USEC_INFINITY
)
1732 watchdog_set_timeout(&arg_runtime_watchdog
);
1734 if (arg_timer_slack_nsec
!= NSEC_INFINITY
)
1735 if (prctl(PR_SET_TIMERSLACK
, arg_timer_slack_nsec
) < 0)
1736 log_error_errno(errno
, "Failed to adjust timer slack: %m");
1738 if (!cap_test_all(arg_capability_bounding_set
)) {
1739 r
= capability_bounding_set_drop_usermode(arg_capability_bounding_set
);
1741 log_emergency_errno(r
, "Failed to drop capability bounding set of usermode helpers: %m");
1742 error_message
= "Failed to drop capability bounding set of usermode helpers";
1745 r
= capability_bounding_set_drop(arg_capability_bounding_set
, true);
1747 log_emergency_errno(r
, "Failed to drop capability bounding set: %m");
1748 error_message
= "Failed to drop capability bounding set";
1753 if (arg_syscall_archs
) {
1754 r
= enforce_syscall_archs(arg_syscall_archs
);
1756 error_message
= "Failed to set syscall architectures";
1762 /* Become reaper of our children */
1763 if (prctl(PR_SET_CHILD_SUBREAPER
, 1) < 0)
1764 log_warning_errno(errno
, "Failed to make us a subreaper: %m");
1767 bump_rlimit_nofile(&saved_rlimit_nofile
);
1770 r
= unit_file_preset_all(UNIT_FILE_SYSTEM
, false, NULL
, UNIT_FILE_PRESET_ENABLE_ONLY
, false, NULL
, 0);
1772 log_full_errno(r
== -EEXIST
? LOG_NOTICE
: LOG_WARNING
, r
, "Failed to populate /etc with preset unit settings, ignoring: %m");
1774 log_info("Populated /etc with preset unit settings.");
1778 r
= manager_new(arg_system
? UNIT_FILE_SYSTEM
: UNIT_FILE_USER
, arg_action
== ACTION_TEST
, &m
);
1780 log_emergency_errno(r
, "Failed to allocate manager object: %m");
1781 error_message
= "Failed to allocate manager object";
1785 m
->confirm_spawn
= arg_confirm_spawn
;
1786 m
->runtime_watchdog
= arg_runtime_watchdog
;
1787 m
->shutdown_watchdog
= arg_shutdown_watchdog
;
1788 m
->userspace_timestamp
= userspace_timestamp
;
1789 m
->kernel_timestamp
= kernel_timestamp
;
1790 m
->initrd_timestamp
= initrd_timestamp
;
1791 m
->security_start_timestamp
= security_start_timestamp
;
1792 m
->security_finish_timestamp
= security_finish_timestamp
;
1794 manager_set_defaults(m
);
1795 manager_set_show_status(m
, arg_show_status
);
1796 manager_set_first_boot(m
, empty_etc
);
1798 /* Remember whether we should queue the default job */
1799 queue_default_job
= !arg_serialization
|| arg_switched_root
;
1801 before_startup
= now(CLOCK_MONOTONIC
);
1803 r
= manager_startup(m
, arg_serialization
, fds
);
1805 log_error_errno(r
, "Failed to fully start up daemon: %m");
1807 /* This will close all file descriptors that were opened, but
1808 * not claimed by any unit. */
1809 fds
= fdset_free(fds
);
1811 arg_serialization
= safe_fclose(arg_serialization
);
1813 if (queue_default_job
) {
1814 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1815 Unit
*target
= NULL
;
1816 Job
*default_unit_job
;
1818 log_debug("Activating default unit: %s", arg_default_unit
);
1820 r
= manager_load_unit(m
, arg_default_unit
, NULL
, &error
, &target
);
1822 log_error("Failed to load default target: %s", bus_error_message(&error
, r
));
1823 else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
)
1824 log_error_errno(target
->load_error
, "Failed to load default target: %m");
1825 else if (target
->load_state
== UNIT_MASKED
)
1826 log_error("Default target masked.");
1828 if (!target
|| target
->load_state
!= UNIT_LOADED
) {
1829 log_info("Trying to load rescue target...");
1831 r
= manager_load_unit(m
, SPECIAL_RESCUE_TARGET
, NULL
, &error
, &target
);
1833 log_emergency("Failed to load rescue target: %s", bus_error_message(&error
, r
));
1834 error_message
= "Failed to load rescue target";
1836 } else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
) {
1837 log_emergency_errno(target
->load_error
, "Failed to load rescue target: %m");
1838 error_message
= "Failed to load rescue target";
1840 } else if (target
->load_state
== UNIT_MASKED
) {
1841 log_emergency("Rescue target masked.");
1842 error_message
= "Rescue target masked";
1847 assert(target
->load_state
== UNIT_LOADED
);
1849 if (arg_action
== ACTION_TEST
) {
1850 printf("-> By units:\n");
1851 manager_dump_units(m
, stdout
, "\t");
1854 r
= manager_add_job(m
, JOB_START
, target
, JOB_ISOLATE
, &error
, &default_unit_job
);
1856 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error
, r
));
1858 sd_bus_error_free(&error
);
1860 r
= manager_add_job(m
, JOB_START
, target
, JOB_REPLACE
, &error
, &default_unit_job
);
1862 log_emergency("Failed to start default target: %s", bus_error_message(&error
, r
));
1863 error_message
= "Failed to start default target";
1867 log_emergency("Failed to isolate default target: %s", bus_error_message(&error
, r
));
1868 error_message
= "Failed to isolate default target";
1872 m
->default_unit_job_id
= default_unit_job
->id
;
1874 after_startup
= now(CLOCK_MONOTONIC
);
1875 log_full(arg_action
== ACTION_TEST
? LOG_INFO
: LOG_DEBUG
,
1876 "Loaded units and determined initial transaction in %s.",
1877 format_timespan(timespan
, sizeof(timespan
), after_startup
- before_startup
, 100 * USEC_PER_MSEC
));
1879 if (arg_action
== ACTION_TEST
) {
1880 printf("-> By jobs:\n");
1881 manager_dump_jobs(m
, stdout
, "\t");
1882 retval
= EXIT_SUCCESS
;
1888 r
= manager_loop(m
);
1890 log_emergency_errno(r
, "Failed to run main loop: %m");
1891 error_message
= "Failed to run main loop";
1895 switch (m
->exit_code
) {
1897 case MANAGER_RELOAD
:
1898 log_info("Reloading.");
1900 r
= parse_config_file();
1902 log_error("Failed to parse config file.");
1904 manager_set_defaults(m
);
1906 r
= manager_reload(m
);
1908 log_error_errno(r
, "Failed to reload: %m");
1911 case MANAGER_REEXECUTE
:
1913 if (prepare_reexecute(m
, &arg_serialization
, &fds
, false) < 0) {
1914 error_message
= "Failed to prepare for reexecution";
1919 log_notice("Reexecuting.");
1922 case MANAGER_SWITCH_ROOT
:
1923 /* Steal the switch root parameters */
1924 switch_root_dir
= m
->switch_root
;
1925 switch_root_init
= m
->switch_root_init
;
1926 m
->switch_root
= m
->switch_root_init
= NULL
;
1928 if (!switch_root_init
)
1929 if (prepare_reexecute(m
, &arg_serialization
, &fds
, true) < 0) {
1930 error_message
= "Failed to prepare for reexecution";
1935 log_notice("Switching root.");
1939 retval
= m
->return_value
;
1941 if (MANAGER_IS_USER(m
)) {
1947 case MANAGER_REBOOT
:
1948 case MANAGER_POWEROFF
:
1950 case MANAGER_KEXEC
: {
1951 static const char * const table
[_MANAGER_EXIT_CODE_MAX
] = {
1952 [MANAGER_EXIT
] = "exit",
1953 [MANAGER_REBOOT
] = "reboot",
1954 [MANAGER_POWEROFF
] = "poweroff",
1955 [MANAGER_HALT
] = "halt",
1956 [MANAGER_KEXEC
] = "kexec"
1959 assert_se(shutdown_verb
= table
[m
->exit_code
]);
1960 arm_reboot_watchdog
= m
->exit_code
== MANAGER_REBOOT
;
1962 log_notice("Shutting down.");
1967 assert_not_reached("Unknown exit code.");
1975 arg_shutdown_watchdog
= m
->shutdown_watchdog
;
1977 m
= manager_free(m
);
1979 for (j
= 0; j
< ELEMENTSOF(arg_default_rlimit
); j
++)
1980 arg_default_rlimit
[j
] = mfree(arg_default_rlimit
[j
]);
1982 arg_default_unit
= mfree(arg_default_unit
);
1983 arg_join_controllers
= strv_free_free(arg_join_controllers
);
1984 arg_default_environment
= strv_free(arg_default_environment
);
1985 arg_syscall_archs
= set_free(arg_syscall_archs
);
1987 mac_selinux_finish();
1991 unsigned i
, args_size
;
1993 /* Close and disarm the watchdog, so that the new
1994 * instance can reinitialize it, but doesn't get
1995 * rebooted while we do that */
1996 watchdog_close(true);
1998 /* Reset the RLIMIT_NOFILE to the kernel default, so
1999 * that the new systemd can pass the kernel default to
2000 * its child processes */
2001 if (saved_rlimit_nofile
.rlim_cur
> 0)
2002 (void) setrlimit(RLIMIT_NOFILE
, &saved_rlimit_nofile
);
2004 if (switch_root_dir
) {
2005 /* Kill all remaining processes from the
2006 * initrd, but don't wait for them, so that we
2007 * can handle the SIGCHLD for them after
2009 broadcast_signal(SIGTERM
, false, true);
2011 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
2012 r
= switch_root(switch_root_dir
, "/mnt", true, MS_MOVE
);
2014 log_error_errno(r
, "Failed to switch root, trying to continue: %m");
2017 /* Reopen the console */
2018 (void) make_console_stdio();
2020 args_size
= MAX(6, argc
+1);
2021 args
= newa(const char*, args_size
);
2023 if (!switch_root_init
) {
2024 char sfd
[DECIMAL_STR_MAX(int) + 1];
2026 /* First try to spawn ourselves with the right
2027 * path, and with full serialization. We do
2028 * this only if the user didn't specify an
2029 * explicit init to spawn. */
2031 assert(arg_serialization
);
2034 xsprintf(sfd
, "%i", fileno(arg_serialization
));
2037 args
[i
++] = SYSTEMD_BINARY_PATH
;
2038 if (switch_root_dir
)
2039 args
[i
++] = "--switched-root";
2040 args
[i
++] = arg_system
? "--system" : "--user";
2041 args
[i
++] = "--deserialize";
2045 assert(i
<= args_size
);
2048 * We want valgrind to print its memory usage summary before reexecution.
2049 * Valgrind won't do this is on its own on exec(), but it will do it on exit().
2050 * Hence, to ensure we get a summary here, fork() off a child, let it exit() cleanly,
2051 * so that it prints the summary, and wait() for it in the parent, before proceeding into the exec().
2053 valgrind_summary_hack();
2055 (void) execv(args
[0], (char* const*) args
);
2058 /* Try the fallback, if there is any, without any
2059 * serialization. We pass the original argv[] and
2060 * envp[]. (Well, modulo the ordering changes due to
2061 * getopt() in argv[], and some cleanups in envp[],
2062 * but let's hope that doesn't matter.) */
2064 arg_serialization
= safe_fclose(arg_serialization
);
2065 fds
= fdset_free(fds
);
2067 for (j
= 1, i
= 1; j
< (unsigned) argc
; j
++)
2068 args
[i
++] = argv
[j
];
2070 assert(i
<= args_size
);
2072 /* Reenable any blocked signals, especially important
2073 * if we switch from initial ramdisk to init=... */
2074 (void) reset_all_signal_handlers();
2075 (void) reset_signal_mask();
2077 if (switch_root_init
) {
2078 args
[0] = switch_root_init
;
2079 (void) execv(args
[0], (char* const*) args
);
2080 log_warning_errno(errno
, "Failed to execute configured init, trying fallback: %m");
2083 args
[0] = "/sbin/init";
2084 (void) execv(args
[0], (char* const*) args
);
2086 if (errno
== ENOENT
) {
2087 log_warning("No /sbin/init, trying fallback");
2089 args
[0] = "/bin/sh";
2091 (void) execv(args
[0], (char* const*) args
);
2092 log_error_errno(errno
, "Failed to execute /bin/sh, giving up: %m");
2094 log_warning_errno(errno
, "Failed to execute /sbin/init, giving up: %m");
2097 arg_serialization
= safe_fclose(arg_serialization
);
2098 fds
= fdset_free(fds
);
2100 #ifdef HAVE_VALGRIND_VALGRIND_H
2101 /* If we are PID 1 and running under valgrind, then let's exit
2102 * here explicitly. valgrind will only generate nice output on
2103 * exit(), not on exec(), hence let's do the former not the
2105 if (getpid() == 1 && RUNNING_ON_VALGRIND
)
2109 if (shutdown_verb
) {
2110 char log_level
[DECIMAL_STR_MAX(int) + 1];
2111 char exit_code
[DECIMAL_STR_MAX(uint8_t) + 1];
2112 const char* command_line
[11] = {
2113 SYSTEMD_SHUTDOWN_BINARY_PATH
,
2115 "--log-level", log_level
,
2119 _cleanup_strv_free_
char **env_block
= NULL
;
2121 assert(command_line
[pos
] == NULL
);
2122 env_block
= strv_copy(environ
);
2124 xsprintf(log_level
, "%d", log_get_max_level());
2126 switch (log_get_target()) {
2128 case LOG_TARGET_KMSG
:
2129 case LOG_TARGET_JOURNAL_OR_KMSG
:
2130 case LOG_TARGET_SYSLOG_OR_KMSG
:
2131 command_line
[pos
++] = "kmsg";
2134 case LOG_TARGET_NULL
:
2135 command_line
[pos
++] = "null";
2138 case LOG_TARGET_CONSOLE
:
2140 command_line
[pos
++] = "console";
2144 if (log_get_show_color())
2145 command_line
[pos
++] = "--log-color";
2147 if (log_get_show_location())
2148 command_line
[pos
++] = "--log-location";
2150 if (streq(shutdown_verb
, "exit")) {
2151 command_line
[pos
++] = "--exit-code";
2152 command_line
[pos
++] = exit_code
;
2153 xsprintf(exit_code
, "%d", retval
);
2156 assert(pos
< ELEMENTSOF(command_line
));
2158 if (arm_reboot_watchdog
&& arg_shutdown_watchdog
> 0 && arg_shutdown_watchdog
!= USEC_INFINITY
) {
2161 /* If we reboot let's set the shutdown
2162 * watchdog and tell the shutdown binary to
2163 * repeatedly ping it */
2164 r
= watchdog_set_timeout(&arg_shutdown_watchdog
);
2165 watchdog_close(r
< 0);
2167 /* Tell the binary how often to ping, ignore failure */
2168 if (asprintf(&e
, "WATCHDOG_USEC="USEC_FMT
, arg_shutdown_watchdog
) > 0)
2169 (void) strv_push(&env_block
, e
);
2171 watchdog_close(true);
2173 /* Avoid the creation of new processes forked by the
2174 * kernel; at this point, we will not listen to the
2176 if (detect_container() <= 0)
2177 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER
);
2179 execve(SYSTEMD_SHUTDOWN_BINARY_PATH
, (char **) command_line
, env_block
);
2180 log_error_errno(errno
, "Failed to execute shutdown binary, %s: %m",
2181 getpid() == 1 ? "freezing" : "quitting");
2184 if (getpid() == 1) {
2186 manager_status_printf(NULL
, STATUS_TYPE_EMERGENCY
,
2187 ANSI_HIGHLIGHT_RED
"!!!!!!" ANSI_NORMAL
,
2188 "%s, freezing.", error_message
);