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/>.
30 #include <sys/prctl.h>
31 #include <sys/mount.h>
33 #ifdef HAVE_VALGRIND_VALGRIND_H
34 #include <valgrind/valgrind.h>
40 #include "sd-daemon.h"
45 #include "conf-parser.h"
52 #include "architecture.h"
54 #include "switch-root.h"
55 #include "capability.h"
58 #include "clock-util.h"
60 #include "bus-error.h"
62 #include "selinux-util.h"
63 #include "formats-util.h"
64 #include "process-util.h"
65 #include "terminal-util.h"
66 #include "signal-util.h"
68 #include "dbus-manager.h"
69 #include "load-fragment.h"
71 #include "mount-setup.h"
72 #include "loopback-setup.h"
73 #include "hostname-setup.h"
74 #include "machine-id-setup.h"
75 #include "selinux-setup.h"
76 #include "ima-setup.h"
77 #include "smack-setup.h"
78 #include "kmod-setup.h"
85 ACTION_DUMP_CONFIGURATION_ITEMS
,
87 } arg_action
= ACTION_RUN
;
88 static char *arg_default_unit
= NULL
;
89 static ManagerRunningAs arg_running_as
= _MANAGER_RUNNING_AS_INVALID
;
90 static bool arg_dump_core
= true;
91 static bool arg_crash_shell
= false;
92 static int arg_crash_chvt
= -1;
93 static bool arg_confirm_spawn
= false;
94 static ShowStatus arg_show_status
= _SHOW_STATUS_UNSET
;
95 static bool arg_switched_root
= false;
96 static int arg_no_pager
= -1;
97 static char ***arg_join_controllers
= NULL
;
98 static ExecOutput arg_default_std_output
= EXEC_OUTPUT_JOURNAL
;
99 static ExecOutput arg_default_std_error
= EXEC_OUTPUT_INHERIT
;
100 static usec_t arg_default_restart_usec
= DEFAULT_RESTART_USEC
;
101 static usec_t arg_default_timeout_start_usec
= DEFAULT_TIMEOUT_USEC
;
102 static usec_t arg_default_timeout_stop_usec
= DEFAULT_TIMEOUT_USEC
;
103 static usec_t arg_default_start_limit_interval
= DEFAULT_START_LIMIT_INTERVAL
;
104 static unsigned arg_default_start_limit_burst
= DEFAULT_START_LIMIT_BURST
;
105 static usec_t arg_runtime_watchdog
= 0;
106 static usec_t arg_shutdown_watchdog
= 10 * USEC_PER_MINUTE
;
107 static char **arg_default_environment
= NULL
;
108 static struct rlimit
*arg_default_rlimit
[_RLIMIT_MAX
] = {};
109 static uint64_t arg_capability_bounding_set_drop
= 0;
110 static nsec_t arg_timer_slack_nsec
= NSEC_INFINITY
;
111 static usec_t arg_default_timer_accuracy_usec
= 1 * USEC_PER_MINUTE
;
112 static Set
* arg_syscall_archs
= NULL
;
113 static FILE* arg_serialization
= NULL
;
114 static bool arg_default_cpu_accounting
= false;
115 static bool arg_default_blockio_accounting
= false;
116 static bool arg_default_memory_accounting
= false;
118 static void nop_handler(int sig
) {}
120 static void pager_open_if_enabled(void) {
122 if (arg_no_pager
<= 0)
128 noreturn
static void crash(int sig
) {
131 /* Pass this on immediately, if this is not PID 1 */
133 else if (!arg_dump_core
)
134 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig
));
136 struct sigaction sa
= {
137 .sa_handler
= nop_handler
,
138 .sa_flags
= SA_NOCLDSTOP
|SA_RESTART
,
142 /* We want to wait for the core process, hence let's enable SIGCHLD */
143 sigaction(SIGCHLD
, &sa
, NULL
);
145 pid
= raw_clone(SIGCHLD
, NULL
);
147 log_emergency_errno(errno
, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig
));
150 struct rlimit rl
= {};
152 /* Enable default signal handler for core dump */
154 sa
.sa_handler
= SIG_DFL
;
155 sigaction(sig
, &sa
, NULL
);
157 /* Don't limit the core dump size */
158 rl
.rlim_cur
= RLIM_INFINITY
;
159 rl
.rlim_max
= RLIM_INFINITY
;
160 setrlimit(RLIMIT_CORE
, &rl
);
162 /* Just to be sure... */
165 /* Raise the signal again */
167 kill(pid
, sig
); /* raise() would kill the parent */
169 assert_not_reached("We shouldn't be here...");
175 /* Order things nicely. */
176 r
= wait_for_terminate(pid
, &status
);
178 log_emergency_errno(r
, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig
));
179 else if (status
.si_code
!= CLD_DUMPED
)
180 log_emergency("Caught <%s>, core dump failed (child "PID_FMT
", code=%s, status=%i/%s).",
181 signal_to_string(sig
),
182 pid
, sigchld_code_to_string(status
.si_code
),
184 strna(status
.si_code
== CLD_EXITED
185 ? exit_status_to_string(status
.si_status
, EXIT_STATUS_FULL
)
186 : signal_to_string(status
.si_status
)));
188 log_emergency("Caught <%s>, dumped core as pid "PID_FMT
".", signal_to_string(sig
), pid
);
193 chvt(arg_crash_chvt
);
195 if (arg_crash_shell
) {
196 struct sigaction sa
= {
197 .sa_handler
= SIG_IGN
,
198 .sa_flags
= SA_NOCLDSTOP
|SA_NOCLDWAIT
|SA_RESTART
,
202 log_info("Executing crash shell in 10s...");
205 /* Let the kernel reap children for us */
206 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
208 pid
= raw_clone(SIGCHLD
, NULL
);
210 log_emergency_errno(errno
, "Failed to fork off crash shell: %m");
212 make_console_stdio();
213 execle("/bin/sh", "/bin/sh", NULL
, environ
);
215 log_emergency_errno(errno
, "execle() failed: %m");
218 log_info("Successfully spawned crash shell as PID "PID_FMT
".", pid
);
221 log_emergency("Freezing execution.");
225 static void install_crash_handler(void) {
226 static const struct sigaction sa
= {
228 .sa_flags
= SA_NODEFER
, /* So that we can raise the signal again from the signal handler */
232 /* We ignore the return value here, since, we don't mind if we
233 * cannot set up a crash handler */
234 r
= sigaction_many(&sa
, SIGNALS_CRASH_HANDLER
, -1);
236 log_debug_errno(r
, "I had trouble setting up the crash handler, ignoring: %m");
239 static int console_setup(void) {
240 _cleanup_close_
int tty_fd
= -1;
243 tty_fd
= open_terminal("/dev/console", O_WRONLY
|O_NOCTTY
|O_CLOEXEC
);
245 return log_error_errno(tty_fd
, "Failed to open /dev/console: %m");
247 /* We don't want to force text mode. plymouth may be showing
248 * pictures already from initrd. */
249 r
= reset_terminal_fd(tty_fd
, false);
251 return log_error_errno(r
, "Failed to reset /dev/console: %m");
256 static int set_default_unit(const char *u
) {
265 free(arg_default_unit
);
266 arg_default_unit
= c
;
271 static int parse_proc_cmdline_item(const char *key
, const char *value
) {
273 static const char * const rlmap
[] = {
274 "emergency", SPECIAL_EMERGENCY_TARGET
,
275 "-b", SPECIAL_EMERGENCY_TARGET
,
276 "rescue", SPECIAL_RESCUE_TARGET
,
277 "single", SPECIAL_RESCUE_TARGET
,
278 "-s", SPECIAL_RESCUE_TARGET
,
279 "s", SPECIAL_RESCUE_TARGET
,
280 "S", SPECIAL_RESCUE_TARGET
,
281 "1", SPECIAL_RESCUE_TARGET
,
282 "2", SPECIAL_MULTI_USER_TARGET
,
283 "3", SPECIAL_MULTI_USER_TARGET
,
284 "4", SPECIAL_MULTI_USER_TARGET
,
285 "5", SPECIAL_GRAPHICAL_TARGET
,
291 if (streq(key
, "systemd.unit") && value
) {
294 return set_default_unit(value
);
296 } else if (streq(key
, "rd.systemd.unit") && value
) {
299 return set_default_unit(value
);
301 } else if (streq(key
, "systemd.dump_core") && value
) {
303 r
= parse_boolean(value
);
305 log_warning("Failed to parse dump core switch %s. Ignoring.", value
);
309 } else if (streq(key
, "systemd.crash_shell") && value
) {
311 r
= parse_boolean(value
);
313 log_warning("Failed to parse crash shell switch %s. Ignoring.", value
);
317 } else if (streq(key
, "systemd.crash_chvt") && value
) {
319 if (safe_atoi(value
, &r
) < 0)
320 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value
);
324 } else if (streq(key
, "systemd.confirm_spawn") && value
) {
326 r
= parse_boolean(value
);
328 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value
);
330 arg_confirm_spawn
= r
;
332 } else if (streq(key
, "systemd.show_status") && value
) {
334 r
= parse_show_status(value
, &arg_show_status
);
336 log_warning("Failed to parse show status switch %s. Ignoring.", value
);
338 } else if (streq(key
, "systemd.default_standard_output") && value
) {
340 r
= exec_output_from_string(value
);
342 log_warning("Failed to parse default standard output switch %s. Ignoring.", value
);
344 arg_default_std_output
= r
;
346 } else if (streq(key
, "systemd.default_standard_error") && value
) {
348 r
= exec_output_from_string(value
);
350 log_warning("Failed to parse default standard error switch %s. Ignoring.", value
);
352 arg_default_std_error
= r
;
354 } else if (streq(key
, "systemd.setenv") && value
) {
356 if (env_assignment_is_valid(value
)) {
359 env
= strv_env_set(arg_default_environment
, value
);
361 arg_default_environment
= env
;
363 log_warning_errno(ENOMEM
, "Setting environment variable '%s' failed, ignoring: %m", value
);
365 log_warning("Environment variable name '%s' is not valid. Ignoring.", value
);
367 } else if (streq(key
, "quiet") && !value
) {
369 if (arg_show_status
== _SHOW_STATUS_UNSET
)
370 arg_show_status
= SHOW_STATUS_AUTO
;
372 } else if (streq(key
, "debug") && !value
) {
374 /* Note that log_parse_environment() handles 'debug'
375 * too, and sets the log level to LOG_DEBUG. */
377 if (detect_container(NULL
) > 0)
378 log_set_target(LOG_TARGET_CONSOLE
);
380 } else if (!in_initrd() && !value
) {
383 /* SysV compatibility */
384 for (i
= 0; i
< ELEMENTSOF(rlmap
); i
+= 2)
385 if (streq(key
, rlmap
[i
]))
386 return set_default_unit(rlmap
[i
+1]);
392 #define DEFINE_SETTER(name, func, descr) \
393 static int name(const char *unit, \
394 const char *filename, \
396 const char *section, \
397 unsigned section_line, \
398 const char *lvalue, \
400 const char *rvalue, \
412 log_syntax(unit, LOG_ERR, filename, line, -r, \
413 "Invalid " descr "'%s': %s", \
414 rvalue, strerror(-r)); \
419 DEFINE_SETTER(config_parse_level2
, log_set_max_level_from_string
, "log level")
420 DEFINE_SETTER(config_parse_target
, log_set_target_from_string
, "target")
421 DEFINE_SETTER(config_parse_color
, log_show_color_from_string
, "color" )
422 DEFINE_SETTER(config_parse_location
, log_show_location_from_string
, "location")
424 static int config_parse_cpu_affinity2(
426 const char *filename
,
429 unsigned section_line
,
436 const char *word
, *state
;
445 FOREACH_WORD_QUOTED(word
, l
, rvalue
, state
) {
450 if (!(t
= strndup(word
, l
)))
453 r
= safe_atou(t
, &cpu
);
457 if (!(c
= cpu_set_malloc(&ncpus
)))
460 if (r
< 0 || cpu
>= ncpus
) {
461 log_syntax(unit
, LOG_ERR
, filename
, line
, -r
,
462 "Failed to parse CPU affinity '%s'", rvalue
);
467 CPU_SET_S(cpu
, CPU_ALLOC_SIZE(ncpus
), c
);
470 log_syntax(unit
, LOG_ERR
, filename
, line
, EINVAL
,
471 "Trailing garbage, ignoring.");
474 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus
), c
) < 0)
475 log_warning("Failed to set CPU affinity: %m");
483 static int config_parse_show_status(
485 const char *filename
,
488 unsigned section_line
,
496 ShowStatus
*b
= data
;
503 k
= parse_show_status(rvalue
, b
);
505 log_syntax(unit
, LOG_ERR
, filename
, line
, -k
,
506 "Failed to parse show status setting, ignoring: %s", rvalue
);
513 static void strv_free_free(char ***l
) {
525 static void free_join_controllers(void) {
526 strv_free_free(arg_join_controllers
);
527 arg_join_controllers
= NULL
;
530 static int config_parse_join_controllers(const char *unit
,
531 const char *filename
,
534 unsigned section_line
,
542 const char *word
, *state
;
549 free_join_controllers();
551 FOREACH_WORD_QUOTED(word
, length
, rvalue
, state
) {
554 s
= strndup(word
, length
);
558 l
= strv_split(s
, ",");
563 if (strv_length(l
) <= 1) {
568 if (!arg_join_controllers
) {
569 arg_join_controllers
= new(char**, 2);
570 if (!arg_join_controllers
) {
575 arg_join_controllers
[0] = l
;
576 arg_join_controllers
[1] = NULL
;
583 t
= new0(char**, n
+2);
591 for (a
= arg_join_controllers
; *a
; a
++) {
593 if (strv_overlap(*a
, l
)) {
594 if (strv_extend_strv(&l
, *a
) < 0) {
614 t
[n
++] = strv_uniq(l
);
616 strv_free_free(arg_join_controllers
);
617 arg_join_controllers
= t
;
621 log_syntax(unit
, LOG_ERR
, filename
, line
, EINVAL
,
622 "Trailing garbage, ignoring.");
627 static int parse_config_file(void) {
629 const ConfigTableItem items
[] = {
630 { "Manager", "LogLevel", config_parse_level2
, 0, NULL
},
631 { "Manager", "LogTarget", config_parse_target
, 0, NULL
},
632 { "Manager", "LogColor", config_parse_color
, 0, NULL
},
633 { "Manager", "LogLocation", config_parse_location
, 0, NULL
},
634 { "Manager", "DumpCore", config_parse_bool
, 0, &arg_dump_core
},
635 { "Manager", "CrashShell", config_parse_bool
, 0, &arg_crash_shell
},
636 { "Manager", "ShowStatus", config_parse_show_status
, 0, &arg_show_status
},
637 { "Manager", "CrashChVT", config_parse_int
, 0, &arg_crash_chvt
},
638 { "Manager", "CPUAffinity", config_parse_cpu_affinity2
, 0, NULL
},
639 { "Manager", "JoinControllers", config_parse_join_controllers
, 0, &arg_join_controllers
},
640 { "Manager", "RuntimeWatchdogSec", config_parse_sec
, 0, &arg_runtime_watchdog
},
641 { "Manager", "ShutdownWatchdogSec", config_parse_sec
, 0, &arg_shutdown_watchdog
},
642 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set
, 0, &arg_capability_bounding_set_drop
},
644 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs
, 0, &arg_syscall_archs
},
646 { "Manager", "TimerSlackNSec", config_parse_nsec
, 0, &arg_timer_slack_nsec
},
647 { "Manager", "DefaultTimerAccuracySec", config_parse_sec
, 0, &arg_default_timer_accuracy_usec
},
648 { "Manager", "DefaultStandardOutput", config_parse_output
, 0, &arg_default_std_output
},
649 { "Manager", "DefaultStandardError", config_parse_output
, 0, &arg_default_std_error
},
650 { "Manager", "DefaultTimeoutStartSec", config_parse_sec
, 0, &arg_default_timeout_start_usec
},
651 { "Manager", "DefaultTimeoutStopSec", config_parse_sec
, 0, &arg_default_timeout_stop_usec
},
652 { "Manager", "DefaultRestartSec", config_parse_sec
, 0, &arg_default_restart_usec
},
653 { "Manager", "DefaultStartLimitInterval", config_parse_sec
, 0, &arg_default_start_limit_interval
},
654 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned
, 0, &arg_default_start_limit_burst
},
655 { "Manager", "DefaultEnvironment", config_parse_environ
, 0, &arg_default_environment
},
656 { "Manager", "DefaultLimitCPU", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_CPU
] },
657 { "Manager", "DefaultLimitFSIZE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_FSIZE
] },
658 { "Manager", "DefaultLimitDATA", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_DATA
] },
659 { "Manager", "DefaultLimitSTACK", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_STACK
] },
660 { "Manager", "DefaultLimitCORE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_CORE
] },
661 { "Manager", "DefaultLimitRSS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RSS
] },
662 { "Manager", "DefaultLimitNOFILE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NOFILE
] },
663 { "Manager", "DefaultLimitAS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_AS
] },
664 { "Manager", "DefaultLimitNPROC", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NPROC
] },
665 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_MEMLOCK
] },
666 { "Manager", "DefaultLimitLOCKS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_LOCKS
] },
667 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_SIGPENDING
] },
668 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_MSGQUEUE
] },
669 { "Manager", "DefaultLimitNICE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NICE
] },
670 { "Manager", "DefaultLimitRTPRIO", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RTPRIO
] },
671 { "Manager", "DefaultLimitRTTIME", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RTTIME
] },
672 { "Manager", "DefaultCPUAccounting", config_parse_bool
, 0, &arg_default_cpu_accounting
},
673 { "Manager", "DefaultBlockIOAccounting", config_parse_bool
, 0, &arg_default_blockio_accounting
},
674 { "Manager", "DefaultMemoryAccounting", config_parse_bool
, 0, &arg_default_memory_accounting
},
678 const char *fn
, *conf_dirs_nulstr
;
680 fn
= arg_running_as
== MANAGER_SYSTEM
? PKGSYSCONFDIR
"/system.conf" : PKGSYSCONFDIR
"/user.conf";
681 conf_dirs_nulstr
= arg_running_as
== MANAGER_SYSTEM
? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");
682 config_parse_many(fn
, conf_dirs_nulstr
, "Manager\0",
683 config_item_table_lookup
, items
, false, NULL
);
688 static int parse_argv(int argc
, char *argv
[]) {
691 ARG_LOG_LEVEL
= 0x100,
701 ARG_DUMP_CONFIGURATION_ITEMS
,
708 ARG_DEFAULT_STD_OUTPUT
,
709 ARG_DEFAULT_STD_ERROR
712 static const struct option options
[] = {
713 { "log-level", required_argument
, NULL
, ARG_LOG_LEVEL
},
714 { "log-target", required_argument
, NULL
, ARG_LOG_TARGET
},
715 { "log-color", optional_argument
, NULL
, ARG_LOG_COLOR
},
716 { "log-location", optional_argument
, NULL
, ARG_LOG_LOCATION
},
717 { "unit", required_argument
, NULL
, ARG_UNIT
},
718 { "system", no_argument
, NULL
, ARG_SYSTEM
},
719 { "user", no_argument
, NULL
, ARG_USER
},
720 { "test", no_argument
, NULL
, ARG_TEST
},
721 { "no-pager", no_argument
, NULL
, ARG_NO_PAGER
},
722 { "help", no_argument
, NULL
, 'h' },
723 { "version", no_argument
, NULL
, ARG_VERSION
},
724 { "dump-configuration-items", no_argument
, NULL
, ARG_DUMP_CONFIGURATION_ITEMS
},
725 { "dump-core", optional_argument
, NULL
, ARG_DUMP_CORE
},
726 { "crash-shell", optional_argument
, NULL
, ARG_CRASH_SHELL
},
727 { "confirm-spawn", optional_argument
, NULL
, ARG_CONFIRM_SPAWN
},
728 { "show-status", optional_argument
, NULL
, ARG_SHOW_STATUS
},
729 { "deserialize", required_argument
, NULL
, ARG_DESERIALIZE
},
730 { "switched-root", no_argument
, NULL
, ARG_SWITCHED_ROOT
},
731 { "default-standard-output", required_argument
, NULL
, ARG_DEFAULT_STD_OUTPUT
, },
732 { "default-standard-error", required_argument
, NULL
, ARG_DEFAULT_STD_ERROR
, },
744 while ((c
= getopt_long(argc
, argv
, "hDbsz:", options
, NULL
)) >= 0)
749 r
= log_set_max_level_from_string(optarg
);
751 log_error("Failed to parse log level %s.", optarg
);
758 r
= log_set_target_from_string(optarg
);
760 log_error("Failed to parse log target %s.", optarg
);
769 r
= log_show_color_from_string(optarg
);
771 log_error("Failed to parse log color setting %s.", optarg
);
775 log_show_color(true);
779 case ARG_LOG_LOCATION
:
781 r
= log_show_location_from_string(optarg
);
783 log_error("Failed to parse log location setting %s.", optarg
);
787 log_show_location(true);
791 case ARG_DEFAULT_STD_OUTPUT
:
792 r
= exec_output_from_string(optarg
);
794 log_error("Failed to parse default standard output setting %s.", optarg
);
797 arg_default_std_output
= r
;
800 case ARG_DEFAULT_STD_ERROR
:
801 r
= exec_output_from_string(optarg
);
803 log_error("Failed to parse default standard error output setting %s.", optarg
);
806 arg_default_std_error
= r
;
811 r
= set_default_unit(optarg
);
813 return log_error_errno(r
, "Failed to set default unit %s: %m", optarg
);
818 arg_running_as
= MANAGER_SYSTEM
;
822 arg_running_as
= MANAGER_USER
;
826 arg_action
= ACTION_TEST
;
827 if (arg_no_pager
< 0)
836 arg_action
= ACTION_VERSION
;
839 case ARG_DUMP_CONFIGURATION_ITEMS
:
840 arg_action
= ACTION_DUMP_CONFIGURATION_ITEMS
;
844 r
= optarg
? parse_boolean(optarg
) : 1;
846 log_error("Failed to parse dump core boolean %s.", optarg
);
852 case ARG_CRASH_SHELL
:
853 r
= optarg
? parse_boolean(optarg
) : 1;
855 log_error("Failed to parse crash shell boolean %s.", optarg
);
861 case ARG_CONFIRM_SPAWN
:
862 r
= optarg
? parse_boolean(optarg
) : 1;
864 log_error("Failed to parse confirm spawn boolean %s.", optarg
);
867 arg_confirm_spawn
= r
;
870 case ARG_SHOW_STATUS
:
872 r
= parse_show_status(optarg
, &arg_show_status
);
874 log_error("Failed to parse show status boolean %s.", optarg
);
878 arg_show_status
= SHOW_STATUS_YES
;
881 case ARG_DESERIALIZE
: {
885 r
= safe_atoi(optarg
, &fd
);
886 if (r
< 0 || fd
< 0) {
887 log_error("Failed to parse deserialize option %s.", optarg
);
888 return r
< 0 ? r
: -EINVAL
;
891 fd_cloexec(fd
, true);
895 return log_error_errno(errno
, "Failed to open serialization fd: %m");
897 if (arg_serialization
)
898 fclose(arg_serialization
);
900 arg_serialization
= f
;
905 case ARG_SWITCHED_ROOT
:
906 arg_switched_root
= true;
910 arg_action
= ACTION_HELP
;
911 if (arg_no_pager
< 0)
916 log_set_max_level(LOG_DEBUG
);
922 /* Just to eat away the sysvinit kernel
923 * cmdline args without getopt() error
924 * messages that we'll parse in
925 * parse_proc_cmdline_word() or ignore. */
934 assert_not_reached("Unhandled option code.");
937 if (optind
< argc
&& getpid() != 1) {
938 /* Hmm, when we aren't run as init system
939 * let's complain about excess arguments */
941 log_error("Excess arguments.");
948 static int help(void) {
950 printf("%s [OPTIONS...]\n\n"
951 "Starts up and maintains the system or user services.\n\n"
952 " -h --help Show this help\n"
953 " --test Determine startup sequence, dump it and exit\n"
954 " --no-pager Do not pipe output into a pager\n"
955 " --dump-configuration-items Dump understood unit configuration items\n"
956 " --unit=UNIT Set default unit\n"
957 " --system Run a system instance, even if PID != 1\n"
958 " --user Run a user instance\n"
959 " --dump-core[=0|1] Dump core on crash\n"
960 " --crash-shell[=0|1] Run shell on crash\n"
961 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
962 " --show-status[=0|1] Show status updates on the console during bootup\n"
963 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
964 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
965 " --log-color[=0|1] Highlight important log messages\n"
966 " --log-location[=0|1] Include code location in log messages\n"
967 " --default-standard-output= Set default standard output for services\n"
968 " --default-standard-error= Set default standard error output for services\n",
969 program_invocation_short_name
);
974 static int version(void) {
975 puts(PACKAGE_STRING
);
976 puts(SYSTEMD_FEATURES
);
981 static int prepare_reexecute(Manager
*m
, FILE **_f
, FDSet
**_fds
, bool switching_root
) {
990 r
= manager_open_serialization(m
, &f
);
992 log_error_errno(r
, "Failed to create serialization file: %m");
996 /* Make sure nothing is really destructed when we shut down */
998 bus_manager_send_reloading(m
, true);
1003 log_error_errno(r
, "Failed to allocate fd set: %m");
1007 r
= manager_serialize(m
, f
, fds
, switching_root
);
1009 log_error_errno(r
, "Failed to serialize state: %m");
1013 if (fseeko(f
, 0, SEEK_SET
) < 0) {
1014 log_error_errno(errno
, "Failed to rewind serialization fd: %m");
1018 r
= fd_cloexec(fileno(f
), false);
1020 log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization: %m");
1024 r
= fdset_cloexec(fds
, false);
1026 log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization fds: %m");
1044 static int bump_rlimit_nofile(struct rlimit
*saved_rlimit
) {
1048 assert(saved_rlimit
);
1050 /* Save the original RLIMIT_NOFILE so that we can reset it
1051 * later when transitioning from the initrd to the main
1052 * systemd or suchlike. */
1053 if (getrlimit(RLIMIT_NOFILE
, saved_rlimit
) < 0)
1054 return log_error_errno(errno
, "Reading RLIMIT_NOFILE failed: %m");
1056 /* Make sure forked processes get the default kernel setting */
1057 if (!arg_default_rlimit
[RLIMIT_NOFILE
]) {
1060 rl
= newdup(struct rlimit
, saved_rlimit
, 1);
1064 arg_default_rlimit
[RLIMIT_NOFILE
] = rl
;
1067 /* Bump up the resource limit for ourselves substantially */
1068 nl
.rlim_cur
= nl
.rlim_max
= 64*1024;
1069 r
= setrlimit_closest(RLIMIT_NOFILE
, &nl
);
1071 return log_error_errno(r
, "Setting RLIMIT_NOFILE failed: %m");
1076 static void test_mtab(void) {
1078 static const char ok
[] =
1079 "/proc/self/mounts\0"
1081 "../proc/self/mounts\0"
1084 _cleanup_free_
char *p
= NULL
;
1087 /* Check that /etc/mtab is a symlink to the right place or
1088 * non-existing. But certainly not a file, or a symlink to
1089 * some weird place... */
1091 r
= readlink_malloc("/etc/mtab", &p
);
1094 if (r
>= 0 && nulstr_contains(ok
, p
))
1097 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1098 "This is not supported anymore. "
1099 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1102 static void test_usr(void) {
1104 /* Check that /usr is not a separate fs */
1106 if (dir_is_empty("/usr") <= 0)
1109 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1110 "Some things will probably break (sometimes even silently) in mysterious ways. "
1111 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1114 static int initialize_join_controllers(void) {
1115 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1116 * + "net_prio". We'd like to add "cpuset" to the mix, but
1117 * "cpuset" doesn't really work for groups with no initialized
1120 arg_join_controllers
= new(char**, 3);
1121 if (!arg_join_controllers
)
1124 arg_join_controllers
[0] = strv_new("cpu", "cpuacct", NULL
);
1125 arg_join_controllers
[1] = strv_new("net_cls", "net_prio", NULL
);
1126 arg_join_controllers
[2] = NULL
;
1128 if (!arg_join_controllers
[0] || !arg_join_controllers
[1]) {
1129 free_join_controllers();
1136 static int enforce_syscall_archs(Set
*archs
) {
1138 scmp_filter_ctx
*seccomp
;
1143 seccomp
= seccomp_init(SCMP_ACT_ALLOW
);
1147 SET_FOREACH(id
, arg_syscall_archs
, i
) {
1148 r
= seccomp_arch_add(seccomp
, PTR_TO_UINT32(id
) - 1);
1152 log_error_errno(r
, "Failed to add architecture to seccomp: %m");
1157 r
= seccomp_attr_set(seccomp
, SCMP_FLTATR_CTL_NNP
, 0);
1159 log_error_errno(r
, "Failed to unset NO_NEW_PRIVS: %m");
1163 r
= seccomp_load(seccomp
);
1165 log_error_errno(r
, "Failed to add install architecture seccomp: %m");
1168 seccomp_release(seccomp
);
1175 static int status_welcome(void) {
1176 _cleanup_free_
char *pretty_name
= NULL
, *ansi_color
= NULL
;
1179 r
= parse_env_file("/etc/os-release", NEWLINE
,
1180 "PRETTY_NAME", &pretty_name
,
1181 "ANSI_COLOR", &ansi_color
,
1184 r
= parse_env_file("/usr/lib/os-release", NEWLINE
,
1185 "PRETTY_NAME", &pretty_name
,
1186 "ANSI_COLOR", &ansi_color
,
1190 if (r
< 0 && r
!= -ENOENT
)
1191 log_warning_errno(r
, "Failed to read os-release file: %m");
1193 return status_printf(NULL
, false, false,
1194 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1195 isempty(ansi_color
) ? "1" : ansi_color
,
1196 isempty(pretty_name
) ? "Linux" : pretty_name
);
1199 static int write_container_id(void) {
1202 c
= getenv("container");
1206 return write_string_file("/run/systemd/container", c
);
1209 int main(int argc
, char *argv
[]) {
1211 int r
, retval
= EXIT_FAILURE
;
1212 usec_t before_startup
, after_startup
;
1213 char timespan
[FORMAT_TIMESPAN_MAX
];
1215 bool reexecute
= false;
1216 const char *shutdown_verb
= NULL
;
1217 dual_timestamp initrd_timestamp
= DUAL_TIMESTAMP_NULL
;
1218 dual_timestamp userspace_timestamp
= DUAL_TIMESTAMP_NULL
;
1219 dual_timestamp kernel_timestamp
= DUAL_TIMESTAMP_NULL
;
1220 dual_timestamp security_start_timestamp
= DUAL_TIMESTAMP_NULL
;
1221 dual_timestamp security_finish_timestamp
= DUAL_TIMESTAMP_NULL
;
1222 static char systemd
[] = "systemd";
1223 bool skip_setup
= false;
1225 bool loaded_policy
= false;
1226 bool arm_reboot_watchdog
= false;
1227 bool queue_default_job
= false;
1228 bool empty_etc
= false;
1229 char *switch_root_dir
= NULL
, *switch_root_init
= NULL
;
1230 struct rlimit saved_rlimit_nofile
= RLIMIT_MAKE_CONST(0);
1231 const char *error_message
= NULL
;
1233 #ifdef HAVE_SYSV_COMPAT
1234 if (getpid() != 1 && strstr(program_invocation_short_name
, "init")) {
1235 /* This is compatibility support for SysV, where
1236 * calling init as a user is identical to telinit. */
1239 execv(SYSTEMCTL_BINARY_PATH
, argv
);
1240 log_error_errno(errno
, "Failed to exec " SYSTEMCTL_BINARY_PATH
": %m");
1245 dual_timestamp_from_monotonic(&kernel_timestamp
, 0);
1246 dual_timestamp_get(&userspace_timestamp
);
1248 /* Determine if this is a reexecution or normal bootup. We do
1249 * the full command line parsing much later, so let's just
1250 * have a quick peek here. */
1251 if (strv_find(argv
+1, "--deserialize"))
1254 /* If we have switched root, do all the special setup
1256 if (strv_find(argv
+1, "--switched-root"))
1259 /* If we get started via the /sbin/init symlink then we are
1260 called 'init'. After a subsequent reexecution we are then
1261 called 'systemd'. That is confusing, hence let's call us
1262 systemd right-away. */
1263 program_invocation_short_name
= systemd
;
1264 prctl(PR_SET_NAME
, systemd
);
1269 log_show_color(isatty(STDERR_FILENO
) > 0);
1270 log_set_upgrade_syslog_to_journal(true);
1272 /* Disable the umask logic */
1276 if (getpid() == 1 && detect_container(NULL
) <= 0) {
1278 /* Running outside of a container as PID 1 */
1279 arg_running_as
= MANAGER_SYSTEM
;
1281 log_set_target(LOG_TARGET_KMSG
);
1285 initrd_timestamp
= userspace_timestamp
;
1288 mount_setup_early();
1289 dual_timestamp_get(&security_start_timestamp
);
1290 if (mac_selinux_setup(&loaded_policy
) < 0) {
1291 error_message
= "Failed to load SELinux policy";
1293 } else if (ima_setup() < 0) {
1294 error_message
= "Failed to load IMA policy";
1296 } else if (mac_smack_setup(&loaded_policy
) < 0) {
1297 error_message
= "Failed to load SMACK policy";
1300 dual_timestamp_get(&security_finish_timestamp
);
1303 if (mac_selinux_init(NULL
) < 0) {
1304 error_message
= "Failed to initialize SELinux policy";
1309 if (clock_is_localtime() > 0) {
1313 * The very first call of settimeofday() also does a time warp in the kernel.
1315 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1316 * external tools to take care of maintaining the RTC and do all adjustments.
1317 * This matches the behavior of Windows, which leaves the RTC alone if the
1318 * registry tells that the RTC runs in UTC.
1320 r
= clock_set_timezone(&min
);
1322 log_error_errno(r
, "Failed to apply local time delta, ignoring: %m");
1324 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min
);
1325 } else if (!in_initrd()) {
1327 * Do a dummy very first call to seal the kernel's time warp magic.
1329 * Do not call this this from inside the initrd. The initrd might not
1330 * carry /etc/adjtime with LOCAL, but the real system could be set up
1331 * that way. In such case, we need to delay the time-warp or the sealing
1332 * until we reach the real system.
1334 * Do no set the kernel's timezone. The concept of local time cannot
1335 * be supported reliably, the time will jump or be incorrect at every daylight
1336 * saving time change. All kernel local time concepts will be treated
1339 clock_reset_timewarp();
1343 /* Set the default for later on, but don't actually
1344 * open the logs like this for now. Note that if we
1345 * are transitioning from the initrd there might still
1346 * be journal fd open, and we shouldn't attempt
1347 * opening that before we parsed /proc/cmdline which
1348 * might redirect output elsewhere. */
1349 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG
);
1351 } else if (getpid() == 1) {
1352 /* Running inside a container, as PID 1 */
1353 arg_running_as
= MANAGER_SYSTEM
;
1354 log_set_target(LOG_TARGET_CONSOLE
);
1355 log_close_console(); /* force reopen of /dev/console */
1358 /* For the later on, see above... */
1359 log_set_target(LOG_TARGET_JOURNAL
);
1361 /* clear the kernel timestamp,
1362 * because we are in a container */
1363 kernel_timestamp
.monotonic
= 0ULL;
1364 kernel_timestamp
.realtime
= 0ULL;
1367 /* Running as user instance */
1368 arg_running_as
= MANAGER_USER
;
1369 log_set_target(LOG_TARGET_AUTO
);
1372 /* clear the kernel timestamp,
1373 * because we are not PID 1 */
1374 kernel_timestamp
.monotonic
= 0ULL;
1375 kernel_timestamp
.realtime
= 0ULL;
1378 /* Initialize default unit */
1379 r
= set_default_unit(SPECIAL_DEFAULT_TARGET
);
1381 log_emergency_errno(r
, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET
);
1382 error_message
= "Failed to set default unit";
1386 r
= initialize_join_controllers();
1388 error_message
= "Failed to initialize cgroup controllers";
1392 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1393 * /proc/$PID/fd is available. */
1394 if (getpid() == 1) {
1396 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1400 r
= mount_setup(loaded_policy
);
1402 error_message
= "Failed to mount API filesystems";
1407 /* Reset all signal handlers. */
1408 assert_se(reset_all_signal_handlers() == 0);
1410 ignore_signals(SIGNALS_IGNORE
, -1);
1412 if (parse_config_file() < 0) {
1413 error_message
= "Failed to parse config file";
1417 if (arg_running_as
== MANAGER_SYSTEM
) {
1418 r
= parse_proc_cmdline(parse_proc_cmdline_item
);
1420 log_warning_errno(r
, "Failed to parse kernel command line, ignoring: %m");
1423 /* Note that this also parses bits from the kernel command
1424 * line, including "debug". */
1425 log_parse_environment();
1427 if (parse_argv(argc
, argv
) < 0) {
1428 error_message
= "Failed to parse commandline arguments";
1432 if (arg_action
== ACTION_TEST
&&
1434 log_error("Don't run test mode as root.");
1438 if (arg_running_as
== MANAGER_USER
&&
1439 arg_action
== ACTION_RUN
&&
1441 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1445 if (arg_running_as
== MANAGER_SYSTEM
&&
1446 arg_action
== ACTION_RUN
&&
1447 running_in_chroot() > 0) {
1448 log_error("Cannot be run in a chroot() environment.");
1452 if (arg_action
== ACTION_TEST
)
1455 pager_open_if_enabled();
1457 if (arg_action
== ACTION_HELP
) {
1460 } else if (arg_action
== ACTION_VERSION
) {
1463 } else if (arg_action
== ACTION_DUMP_CONFIGURATION_ITEMS
) {
1464 unit_dump_config_items(stdout
);
1465 retval
= EXIT_SUCCESS
;
1467 } else if (arg_action
== ACTION_DONE
) {
1468 retval
= EXIT_SUCCESS
;
1472 if (arg_running_as
== MANAGER_USER
&&
1473 !getenv("XDG_RUNTIME_DIR")) {
1474 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1478 assert_se(arg_action
== ACTION_RUN
|| arg_action
== ACTION_TEST
);
1480 /* Close logging fds, in order not to confuse fdset below */
1483 /* Remember open file descriptors for later deserialization */
1484 r
= fdset_new_fill(&fds
);
1486 log_emergency_errno(r
, "Failed to allocate fd set: %m");
1487 error_message
= "Failed to allocate fd set";
1490 fdset_cloexec(fds
, true);
1492 if (arg_serialization
)
1493 assert_se(fdset_remove(fds
, fileno(arg_serialization
)) >= 0);
1495 if (arg_running_as
== MANAGER_SYSTEM
)
1496 /* Become a session leader if we aren't one yet. */
1499 /* Move out of the way, so that we won't block unmounts */
1500 assert_se(chdir("/") == 0);
1502 /* Reset the console, but only if this is really init and we
1503 * are freshly booted */
1504 if (arg_running_as
== MANAGER_SYSTEM
&& arg_action
== ACTION_RUN
) {
1506 /* If we are init, we connect stdin/stdout/stderr to
1507 * /dev/null and make sure we don't have a controlling
1511 if (getpid() == 1 && !skip_setup
)
1515 /* Open the logging devices, if possible and necessary */
1518 if (arg_show_status
== _SHOW_STATUS_UNSET
)
1519 arg_show_status
= SHOW_STATUS_YES
;
1521 /* Make sure we leave a core dump without panicing the
1523 if (getpid() == 1) {
1524 install_crash_handler();
1526 r
= mount_cgroup_controllers(arg_join_controllers
);
1531 if (arg_running_as
== MANAGER_SYSTEM
) {
1532 const char *virtualization
= NULL
;
1534 log_info(PACKAGE_STRING
" running in %ssystem mode. (" SYSTEMD_FEATURES
")",
1535 arg_action
== ACTION_TEST
? "test " : "" );
1537 detect_virtualization(&virtualization
);
1539 log_info("Detected virtualization %s.", virtualization
);
1541 write_container_id();
1543 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1546 log_info("Running in initial RAM disk.");
1548 /* Let's check whether /etc is already populated. We
1549 * don't actually really check for that, but use
1550 * /etc/machine-id as flag file. This allows container
1551 * managers and installers to provision a couple of
1552 * files already. If the container manager wants to
1553 * provision the machine ID itself it should pass
1554 * $container_uuid to PID 1. */
1556 empty_etc
= access("/etc/machine-id", F_OK
) < 0;
1558 log_info("Running with unpopulated /etc.");
1560 _cleanup_free_
char *t
;
1562 t
= uid_to_name(getuid());
1563 log_debug(PACKAGE_STRING
" running in %suser mode for user "UID_FMT
"/%s. (" SYSTEMD_FEATURES
")",
1564 arg_action
== ACTION_TEST
? " test" : "", getuid(), t
);
1567 if (arg_running_as
== MANAGER_SYSTEM
&& !skip_setup
) {
1568 if (arg_show_status
> 0)
1572 machine_id_setup(NULL
);
1579 if (arg_running_as
== MANAGER_SYSTEM
&& arg_runtime_watchdog
> 0)
1580 watchdog_set_timeout(&arg_runtime_watchdog
);
1582 if (arg_timer_slack_nsec
!= NSEC_INFINITY
)
1583 if (prctl(PR_SET_TIMERSLACK
, arg_timer_slack_nsec
) < 0)
1584 log_error_errno(errno
, "Failed to adjust timer slack: %m");
1586 if (arg_capability_bounding_set_drop
) {
1587 r
= capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop
);
1589 log_emergency_errno(r
, "Failed to drop capability bounding set of usermode helpers: %m");
1590 error_message
= "Failed to drop capability bounding set of usermode helpers";
1593 r
= capability_bounding_set_drop(arg_capability_bounding_set_drop
, true);
1595 log_emergency_errno(r
, "Failed to drop capability bounding set: %m");
1596 error_message
= "Failed to drop capability bounding set";
1601 if (arg_syscall_archs
) {
1602 r
= enforce_syscall_archs(arg_syscall_archs
);
1604 error_message
= "Failed to set syscall architectures";
1609 if (arg_running_as
== MANAGER_USER
)
1610 /* Become reaper of our children */
1611 if (prctl(PR_SET_CHILD_SUBREAPER
, 1) < 0)
1612 log_warning_errno(errno
, "Failed to make us a subreaper: %m");
1614 if (arg_running_as
== MANAGER_SYSTEM
) {
1615 bump_rlimit_nofile(&saved_rlimit_nofile
);
1618 r
= unit_file_preset_all(UNIT_FILE_SYSTEM
, false, NULL
, UNIT_FILE_PRESET_ENABLE_ONLY
, false, NULL
, 0);
1620 log_warning_errno(r
, "Failed to populate /etc with preset unit settings, ignoring: %m");
1622 log_info("Populated /etc with preset unit settings.");
1626 r
= manager_new(arg_running_as
, arg_action
== ACTION_TEST
, &m
);
1628 log_emergency_errno(r
, "Failed to allocate manager object: %m");
1629 error_message
= "Failed to allocate manager object";
1633 m
->confirm_spawn
= arg_confirm_spawn
;
1634 m
->default_timer_accuracy_usec
= arg_default_timer_accuracy_usec
;
1635 m
->default_std_output
= arg_default_std_output
;
1636 m
->default_std_error
= arg_default_std_error
;
1637 m
->default_restart_usec
= arg_default_restart_usec
;
1638 m
->default_timeout_start_usec
= arg_default_timeout_start_usec
;
1639 m
->default_timeout_stop_usec
= arg_default_timeout_stop_usec
;
1640 m
->default_start_limit_interval
= arg_default_start_limit_interval
;
1641 m
->default_start_limit_burst
= arg_default_start_limit_burst
;
1642 m
->default_cpu_accounting
= arg_default_cpu_accounting
;
1643 m
->default_blockio_accounting
= arg_default_blockio_accounting
;
1644 m
->default_memory_accounting
= arg_default_memory_accounting
;
1645 m
->runtime_watchdog
= arg_runtime_watchdog
;
1646 m
->shutdown_watchdog
= arg_shutdown_watchdog
;
1648 m
->userspace_timestamp
= userspace_timestamp
;
1649 m
->kernel_timestamp
= kernel_timestamp
;
1650 m
->initrd_timestamp
= initrd_timestamp
;
1651 m
->security_start_timestamp
= security_start_timestamp
;
1652 m
->security_finish_timestamp
= security_finish_timestamp
;
1654 manager_set_default_rlimits(m
, arg_default_rlimit
);
1655 manager_environment_add(m
, NULL
, arg_default_environment
);
1656 manager_set_show_status(m
, arg_show_status
);
1657 manager_set_first_boot(m
, empty_etc
);
1659 /* Remember whether we should queue the default job */
1660 queue_default_job
= !arg_serialization
|| arg_switched_root
;
1662 before_startup
= now(CLOCK_MONOTONIC
);
1664 r
= manager_startup(m
, arg_serialization
, fds
);
1666 log_error_errno(r
, "Failed to fully start up daemon: %m");
1668 /* This will close all file descriptors that were opened, but
1669 * not claimed by any unit. */
1673 if (arg_serialization
) {
1674 fclose(arg_serialization
);
1675 arg_serialization
= NULL
;
1678 if (queue_default_job
) {
1679 _cleanup_bus_error_free_ sd_bus_error error
= SD_BUS_ERROR_NULL
;
1680 Unit
*target
= NULL
;
1681 Job
*default_unit_job
;
1683 log_debug("Activating default unit: %s", arg_default_unit
);
1685 r
= manager_load_unit(m
, arg_default_unit
, NULL
, &error
, &target
);
1687 log_error("Failed to load default target: %s", bus_error_message(&error
, r
));
1688 else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
)
1689 log_error_errno(target
->load_error
, "Failed to load default target: %m");
1690 else if (target
->load_state
== UNIT_MASKED
)
1691 log_error("Default target masked.");
1693 if (!target
|| target
->load_state
!= UNIT_LOADED
) {
1694 log_info("Trying to load rescue target...");
1696 r
= manager_load_unit(m
, SPECIAL_RESCUE_TARGET
, NULL
, &error
, &target
);
1698 log_emergency("Failed to load rescue target: %s", bus_error_message(&error
, r
));
1699 error_message
= "Failed to load rescue target";
1701 } else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
) {
1702 log_emergency_errno(target
->load_error
, "Failed to load rescue target: %m");
1703 error_message
= "Failed to load rescue target";
1705 } else if (target
->load_state
== UNIT_MASKED
) {
1706 log_emergency("Rescue target masked.");
1707 error_message
= "Rescue target masked";
1712 assert(target
->load_state
== UNIT_LOADED
);
1714 if (arg_action
== ACTION_TEST
) {
1715 printf("-> By units:\n");
1716 manager_dump_units(m
, stdout
, "\t");
1719 r
= manager_add_job(m
, JOB_START
, target
, JOB_ISOLATE
, false, &error
, &default_unit_job
);
1721 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error
, r
));
1723 r
= manager_add_job(m
, JOB_START
, target
, JOB_REPLACE
, false, &error
, &default_unit_job
);
1725 log_emergency("Failed to start default target: %s", bus_error_message(&error
, r
));
1726 error_message
= "Failed to start default target";
1730 log_emergency("Failed to isolate default target: %s", bus_error_message(&error
, r
));
1731 error_message
= "Failed to isolate default target";
1735 m
->default_unit_job_id
= default_unit_job
->id
;
1737 after_startup
= now(CLOCK_MONOTONIC
);
1738 log_full(arg_action
== ACTION_TEST
? LOG_INFO
: LOG_DEBUG
,
1739 "Loaded units and determined initial transaction in %s.",
1740 format_timespan(timespan
, sizeof(timespan
), after_startup
- before_startup
, 100 * USEC_PER_MSEC
));
1742 if (arg_action
== ACTION_TEST
) {
1743 printf("-> By jobs:\n");
1744 manager_dump_jobs(m
, stdout
, "\t");
1745 retval
= EXIT_SUCCESS
;
1751 r
= manager_loop(m
);
1753 log_emergency_errno(r
, "Failed to run main loop: %m");
1754 error_message
= "Failed to run main loop";
1758 switch (m
->exit_code
) {
1761 retval
= EXIT_SUCCESS
;
1765 case MANAGER_RELOAD
:
1766 log_info("Reloading.");
1767 r
= manager_reload(m
);
1769 log_error_errno(r
, "Failed to reload: %m");
1772 case MANAGER_REEXECUTE
:
1774 if (prepare_reexecute(m
, &arg_serialization
, &fds
, false) < 0) {
1775 error_message
= "Failed to prepare for reexection";
1780 log_notice("Reexecuting.");
1783 case MANAGER_SWITCH_ROOT
:
1784 /* Steal the switch root parameters */
1785 switch_root_dir
= m
->switch_root
;
1786 switch_root_init
= m
->switch_root_init
;
1787 m
->switch_root
= m
->switch_root_init
= NULL
;
1789 if (!switch_root_init
)
1790 if (prepare_reexecute(m
, &arg_serialization
, &fds
, true) < 0) {
1791 error_message
= "Failed to prepare for reexection";
1796 log_notice("Switching root.");
1799 case MANAGER_REBOOT
:
1800 case MANAGER_POWEROFF
:
1802 case MANAGER_KEXEC
: {
1803 static const char * const table
[_MANAGER_EXIT_CODE_MAX
] = {
1804 [MANAGER_REBOOT
] = "reboot",
1805 [MANAGER_POWEROFF
] = "poweroff",
1806 [MANAGER_HALT
] = "halt",
1807 [MANAGER_KEXEC
] = "kexec"
1810 assert_se(shutdown_verb
= table
[m
->exit_code
]);
1811 arm_reboot_watchdog
= m
->exit_code
== MANAGER_REBOOT
;
1813 log_notice("Shutting down.");
1818 assert_not_reached("Unknown exit code.");
1826 arg_shutdown_watchdog
= m
->shutdown_watchdog
;
1827 m
= manager_free(m
);
1829 for (j
= 0; j
< ELEMENTSOF(arg_default_rlimit
); j
++) {
1830 free(arg_default_rlimit
[j
]);
1831 arg_default_rlimit
[j
] = NULL
;
1834 free(arg_default_unit
);
1835 arg_default_unit
= NULL
;
1837 free_join_controllers();
1839 strv_free(arg_default_environment
);
1840 arg_default_environment
= NULL
;
1842 set_free(arg_syscall_archs
);
1843 arg_syscall_archs
= NULL
;
1845 mac_selinux_finish();
1849 unsigned i
, args_size
;
1851 /* Close and disarm the watchdog, so that the new
1852 * instance can reinitialize it, but doesn't get
1853 * rebooted while we do that */
1854 watchdog_close(true);
1856 /* Reset the RLIMIT_NOFILE to the kernel default, so
1857 * that the new systemd can pass the kernel default to
1858 * its child processes */
1859 if (saved_rlimit_nofile
.rlim_cur
> 0)
1860 setrlimit(RLIMIT_NOFILE
, &saved_rlimit_nofile
);
1862 if (switch_root_dir
) {
1863 /* Kill all remaining processes from the
1864 * initrd, but don't wait for them, so that we
1865 * can handle the SIGCHLD for them after
1867 broadcast_signal(SIGTERM
, false, true);
1869 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1870 r
= switch_root(switch_root_dir
, "/mnt", true, MS_MOVE
);
1872 log_error_errno(r
, "Failed to switch root, trying to continue: %m");
1875 args_size
= MAX(6, argc
+1);
1876 args
= newa(const char*, args_size
);
1878 if (!switch_root_init
) {
1879 char sfd
[DECIMAL_STR_MAX(int) + 1];
1881 /* First try to spawn ourselves with the right
1882 * path, and with full serialization. We do
1883 * this only if the user didn't specify an
1884 * explicit init to spawn. */
1886 assert(arg_serialization
);
1889 xsprintf(sfd
, "%i", fileno(arg_serialization
));
1892 args
[i
++] = SYSTEMD_BINARY_PATH
;
1893 if (switch_root_dir
)
1894 args
[i
++] = "--switched-root";
1895 args
[i
++] = arg_running_as
== MANAGER_SYSTEM
? "--system" : "--user";
1896 args
[i
++] = "--deserialize";
1900 /* do not pass along the environment we inherit from the kernel or initrd */
1901 if (switch_root_dir
)
1904 assert(i
<= args_size
);
1905 execv(args
[0], (char* const*) args
);
1908 /* Try the fallback, if there is any, without any
1909 * serialization. We pass the original argv[] and
1910 * envp[]. (Well, modulo the ordering changes due to
1911 * getopt() in argv[], and some cleanups in envp[],
1912 * but let's hope that doesn't matter.) */
1914 if (arg_serialization
) {
1915 fclose(arg_serialization
);
1916 arg_serialization
= NULL
;
1924 /* Reopen the console */
1925 make_console_stdio();
1927 for (j
= 1, i
= 1; j
< (unsigned) argc
; j
++)
1928 args
[i
++] = argv
[j
];
1930 assert(i
<= args_size
);
1932 /* Reenable any blocked signals, especially important
1933 * if we switch from initial ramdisk to init=... */
1934 reset_all_signal_handlers();
1935 reset_signal_mask();
1937 if (switch_root_init
) {
1938 args
[0] = switch_root_init
;
1939 execv(args
[0], (char* const*) args
);
1940 log_warning_errno(errno
, "Failed to execute configured init, trying fallback: %m");
1943 args
[0] = "/sbin/init";
1944 execv(args
[0], (char* const*) args
);
1946 if (errno
== ENOENT
) {
1947 log_warning("No /sbin/init, trying fallback");
1949 args
[0] = "/bin/sh";
1951 execv(args
[0], (char* const*) args
);
1952 log_error_errno(errno
, "Failed to execute /bin/sh, giving up: %m");
1954 log_warning_errno(errno
, "Failed to execute /sbin/init, giving up: %m");
1957 if (arg_serialization
) {
1958 fclose(arg_serialization
);
1959 arg_serialization
= NULL
;
1967 #ifdef HAVE_VALGRIND_VALGRIND_H
1968 /* If we are PID 1 and running under valgrind, then let's exit
1969 * here explicitly. valgrind will only generate nice output on
1970 * exit(), not on exec(), hence let's do the former not the
1972 if (getpid() == 1 && RUNNING_ON_VALGRIND
)
1976 if (shutdown_verb
) {
1977 char log_level
[DECIMAL_STR_MAX(int) + 1];
1978 const char* command_line
[9] = {
1979 SYSTEMD_SHUTDOWN_BINARY_PATH
,
1981 "--log-level", log_level
,
1985 _cleanup_strv_free_
char **env_block
= NULL
;
1987 assert(command_line
[pos
] == NULL
);
1988 env_block
= strv_copy(environ
);
1990 xsprintf(log_level
, "%d", log_get_max_level());
1992 switch (log_get_target()) {
1993 case LOG_TARGET_KMSG
:
1994 case LOG_TARGET_JOURNAL_OR_KMSG
:
1995 case LOG_TARGET_SYSLOG_OR_KMSG
:
1996 command_line
[pos
++] = "kmsg";
1999 case LOG_TARGET_CONSOLE
:
2001 command_line
[pos
++] = "console";
2005 if (log_get_show_color())
2006 command_line
[pos
++] = "--log-color";
2008 if (log_get_show_location())
2009 command_line
[pos
++] = "--log-location";
2011 assert(pos
< ELEMENTSOF(command_line
));
2013 if (arm_reboot_watchdog
&& arg_shutdown_watchdog
> 0) {
2016 /* If we reboot let's set the shutdown
2017 * watchdog and tell the shutdown binary to
2018 * repeatedly ping it */
2019 r
= watchdog_set_timeout(&arg_shutdown_watchdog
);
2020 watchdog_close(r
< 0);
2022 /* Tell the binary how often to ping, ignore failure */
2023 if (asprintf(&e
, "WATCHDOG_USEC="USEC_FMT
, arg_shutdown_watchdog
) > 0)
2024 strv_push(&env_block
, e
);
2026 watchdog_close(true);
2028 /* Avoid the creation of new processes forked by the
2029 * kernel; at this point, we will not listen to the
2031 if (detect_container(NULL
) <= 0)
2032 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER
);
2034 execve(SYSTEMD_SHUTDOWN_BINARY_PATH
, (char **) command_line
, env_block
);
2035 log_error_errno(errno
, "Failed to execute shutdown binary, %s: %m",
2036 getpid() == 1 ? "freezing" : "quitting");
2039 if (getpid() == 1) {
2041 manager_status_printf(NULL
, STATUS_TYPE_EMERGENCY
,
2042 ANSI_HIGHLIGHT_RED_ON
"!!!!!!" ANSI_HIGHLIGHT_OFF
,
2043 "%s, freezing.", error_message
);