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/>.
26 #include <sys/types.h>
32 #include <sys/prctl.h>
33 #include <sys/mount.h>
35 #ifdef HAVE_VALGRIND_VALGRIND_H
36 #include <valgrind/valgrind.h>
42 #include "sd-daemon.h"
43 #include "sd-messages.h"
47 #include "load-fragment.h"
50 #include "conf-parser.h"
58 #include "architecture.h"
60 #include "path-util.h"
61 #include "switch-root.h"
62 #include "capability.h"
65 #include "clock-util.h"
67 #include "dbus-manager.h"
68 #include "bus-error.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 SystemdRunningAs arg_running_as
= _SYSTEMD_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
);
147 log_emergency("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 */
168 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.", signal_to_string(sig
));
182 log_emergency("Caught <%s>, dumped core as pid "PID_FMT
".", signal_to_string(sig
), pid
);
187 chvt(arg_crash_chvt
);
189 if (arg_crash_shell
) {
190 struct sigaction sa
= {
191 .sa_handler
= SIG_IGN
,
192 .sa_flags
= SA_NOCLDSTOP
|SA_NOCLDWAIT
|SA_RESTART
,
196 log_info("Executing crash shell in 10s...");
199 /* Let the kernel reap children for us */
200 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
204 log_emergency("Failed to fork off crash shell: %m");
206 make_console_stdio();
207 execl("/bin/sh", "/bin/sh", NULL
);
209 log_emergency("execl() failed: %m");
213 log_info("Successfully spawned crash shell as pid "PID_FMT
".", pid
);
216 log_emergency("Freezing execution.");
220 static void install_crash_handler(void) {
221 struct sigaction sa
= {
223 .sa_flags
= SA_NODEFER
,
226 sigaction_many(&sa
, SIGNALS_CRASH_HANDLER
, -1);
229 static int console_setup(void) {
230 _cleanup_close_
int tty_fd
= -1;
233 tty_fd
= open_terminal("/dev/console", O_WRONLY
|O_NOCTTY
|O_CLOEXEC
);
235 log_error_errno(tty_fd
, "Failed to open /dev/console: %m");
239 /* We don't want to force text mode. plymouth may be showing
240 * pictures already from initrd. */
241 r
= reset_terminal_fd(tty_fd
, false);
243 log_error_errno(r
, "Failed to reset /dev/console: %m");
250 static int set_default_unit(const char *u
) {
259 free(arg_default_unit
);
260 arg_default_unit
= c
;
265 static int parse_proc_cmdline_item(const char *key
, const char *value
) {
267 static const char * const rlmap
[] = {
268 "emergency", SPECIAL_EMERGENCY_TARGET
,
269 "-b", SPECIAL_EMERGENCY_TARGET
,
270 "rescue", SPECIAL_RESCUE_TARGET
,
271 "single", SPECIAL_RESCUE_TARGET
,
272 "-s", SPECIAL_RESCUE_TARGET
,
273 "s", SPECIAL_RESCUE_TARGET
,
274 "S", SPECIAL_RESCUE_TARGET
,
275 "1", SPECIAL_RESCUE_TARGET
,
276 "2", SPECIAL_RUNLEVEL2_TARGET
,
277 "3", SPECIAL_RUNLEVEL3_TARGET
,
278 "4", SPECIAL_RUNLEVEL4_TARGET
,
279 "5", SPECIAL_RUNLEVEL5_TARGET
,
285 if (streq(key
, "systemd.unit") && value
) {
288 return set_default_unit(value
);
290 } else if (streq(key
, "rd.systemd.unit") && value
) {
293 return set_default_unit(value
);
295 } else if (streq(key
, "systemd.dump_core") && value
) {
297 r
= parse_boolean(value
);
299 log_warning("Failed to parse dump core switch %s. Ignoring.", value
);
303 } else if (streq(key
, "systemd.crash_shell") && value
) {
305 r
= parse_boolean(value
);
307 log_warning("Failed to parse crash shell switch %s. Ignoring.", value
);
311 } else if (streq(key
, "systemd.crash_chvt") && value
) {
313 if (safe_atoi(value
, &r
) < 0)
314 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value
);
318 } else if (streq(key
, "systemd.confirm_spawn") && value
) {
320 r
= parse_boolean(value
);
322 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value
);
324 arg_confirm_spawn
= r
;
326 } else if (streq(key
, "systemd.show_status") && value
) {
328 r
= parse_show_status(value
, &arg_show_status
);
330 log_warning("Failed to parse show status switch %s. Ignoring.", value
);
332 } else if (streq(key
, "systemd.default_standard_output") && value
) {
334 r
= exec_output_from_string(value
);
336 log_warning("Failed to parse default standard output switch %s. Ignoring.", value
);
338 arg_default_std_output
= r
;
340 } else if (streq(key
, "systemd.default_standard_error") && value
) {
342 r
= exec_output_from_string(value
);
344 log_warning("Failed to parse default standard error switch %s. Ignoring.", value
);
346 arg_default_std_error
= r
;
348 } else if (streq(key
, "systemd.setenv") && value
) {
350 if (env_assignment_is_valid(value
)) {
353 env
= strv_env_set(arg_default_environment
, value
);
355 arg_default_environment
= env
;
357 log_warning_errno(ENOMEM
, "Setting environment variable '%s' failed, ignoring: %m", value
);
359 log_warning("Environment variable name '%s' is not valid. Ignoring.", value
);
361 } else if (streq(key
, "quiet") && !value
) {
363 log_set_max_level(LOG_NOTICE
);
365 if (arg_show_status
== _SHOW_STATUS_UNSET
)
366 arg_show_status
= SHOW_STATUS_AUTO
;
368 } else if (streq(key
, "debug") && !value
) {
370 /* Note that log_parse_environment() handles 'debug'
371 * too, and sets the log level to LOG_DEBUG. */
373 if (detect_container(NULL
) > 0)
374 log_set_target(LOG_TARGET_CONSOLE
);
376 } else if (!in_initrd() && !value
) {
379 /* SysV compatibility */
380 for (i
= 0; i
< ELEMENTSOF(rlmap
); i
+= 2)
381 if (streq(key
, rlmap
[i
]))
382 return set_default_unit(rlmap
[i
+1]);
388 #define DEFINE_SETTER(name, func, descr) \
389 static int name(const char *unit, \
390 const char *filename, \
392 const char *section, \
393 unsigned section_line, \
394 const char *lvalue, \
396 const char *rvalue, \
408 log_syntax(unit, LOG_ERR, filename, line, -r, \
409 "Invalid " descr "'%s': %s", \
410 rvalue, strerror(-r)); \
415 DEFINE_SETTER(config_parse_level2
, log_set_max_level_from_string
, "log level")
416 DEFINE_SETTER(config_parse_target
, log_set_target_from_string
, "target")
417 DEFINE_SETTER(config_parse_color
, log_show_color_from_string
, "color" )
418 DEFINE_SETTER(config_parse_location
, log_show_location_from_string
, "location")
420 static int config_parse_cpu_affinity2(
422 const char *filename
,
425 unsigned section_line
,
432 const char *word
, *state
;
441 FOREACH_WORD_QUOTED(word
, l
, rvalue
, state
) {
446 if (!(t
= strndup(word
, l
)))
449 r
= safe_atou(t
, &cpu
);
453 if (!(c
= cpu_set_malloc(&ncpus
)))
456 if (r
< 0 || cpu
>= ncpus
) {
457 log_syntax(unit
, LOG_ERR
, filename
, line
, -r
,
458 "Failed to parse CPU affinity '%s'", rvalue
);
463 CPU_SET_S(cpu
, CPU_ALLOC_SIZE(ncpus
), c
);
466 log_syntax(unit
, LOG_ERR
, filename
, line
, EINVAL
,
467 "Trailing garbage, ignoring.");
470 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus
), c
) < 0)
471 log_unit_warning(unit
, "Failed to set CPU affinity: %m");
479 static int config_parse_show_status(
481 const char *filename
,
484 unsigned section_line
,
492 ShowStatus
*b
= data
;
499 k
= parse_show_status(rvalue
, b
);
501 log_syntax(unit
, LOG_ERR
, filename
, line
, -k
,
502 "Failed to parse show status setting, ignoring: %s", rvalue
);
509 static void strv_free_free(char ***l
) {
521 static void free_join_controllers(void) {
522 strv_free_free(arg_join_controllers
);
523 arg_join_controllers
= NULL
;
526 static int config_parse_join_controllers(const char *unit
,
527 const char *filename
,
530 unsigned section_line
,
538 const char *word
, *state
;
545 free_join_controllers();
547 FOREACH_WORD_QUOTED(word
, length
, rvalue
, state
) {
550 s
= strndup(word
, length
);
554 l
= strv_split(s
, ",");
559 if (strv_length(l
) <= 1) {
564 if (!arg_join_controllers
) {
565 arg_join_controllers
= new(char**, 2);
566 if (!arg_join_controllers
) {
571 arg_join_controllers
[0] = l
;
572 arg_join_controllers
[1] = NULL
;
579 t
= new0(char**, n
+2);
587 for (a
= arg_join_controllers
; *a
; a
++) {
589 if (strv_overlap(*a
, l
)) {
590 if (strv_extend_strv(&l
, *a
) < 0) {
610 t
[n
++] = strv_uniq(l
);
612 strv_free_free(arg_join_controllers
);
613 arg_join_controllers
= t
;
617 log_syntax(unit
, LOG_ERR
, filename
, line
, EINVAL
,
618 "Trailing garbage, ignoring.");
623 static int parse_config_file(void) {
625 const ConfigTableItem items
[] = {
626 { "Manager", "LogLevel", config_parse_level2
, 0, NULL
},
627 { "Manager", "LogTarget", config_parse_target
, 0, NULL
},
628 { "Manager", "LogColor", config_parse_color
, 0, NULL
},
629 { "Manager", "LogLocation", config_parse_location
, 0, NULL
},
630 { "Manager", "DumpCore", config_parse_bool
, 0, &arg_dump_core
},
631 { "Manager", "CrashShell", config_parse_bool
, 0, &arg_crash_shell
},
632 { "Manager", "ShowStatus", config_parse_show_status
, 0, &arg_show_status
},
633 { "Manager", "CrashChVT", config_parse_int
, 0, &arg_crash_chvt
},
634 { "Manager", "CPUAffinity", config_parse_cpu_affinity2
, 0, NULL
},
635 { "Manager", "JoinControllers", config_parse_join_controllers
, 0, &arg_join_controllers
},
636 { "Manager", "RuntimeWatchdogSec", config_parse_sec
, 0, &arg_runtime_watchdog
},
637 { "Manager", "ShutdownWatchdogSec", config_parse_sec
, 0, &arg_shutdown_watchdog
},
638 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set
, 0, &arg_capability_bounding_set_drop
},
640 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs
, 0, &arg_syscall_archs
},
642 { "Manager", "TimerSlackNSec", config_parse_nsec
, 0, &arg_timer_slack_nsec
},
643 { "Manager", "DefaultTimerAccuracySec", config_parse_sec
, 0, &arg_default_timer_accuracy_usec
},
644 { "Manager", "DefaultStandardOutput", config_parse_output
, 0, &arg_default_std_output
},
645 { "Manager", "DefaultStandardError", config_parse_output
, 0, &arg_default_std_error
},
646 { "Manager", "DefaultTimeoutStartSec", config_parse_sec
, 0, &arg_default_timeout_start_usec
},
647 { "Manager", "DefaultTimeoutStopSec", config_parse_sec
, 0, &arg_default_timeout_stop_usec
},
648 { "Manager", "DefaultRestartSec", config_parse_sec
, 0, &arg_default_restart_usec
},
649 { "Manager", "DefaultStartLimitInterval", config_parse_sec
, 0, &arg_default_start_limit_interval
},
650 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned
, 0, &arg_default_start_limit_burst
},
651 { "Manager", "DefaultEnvironment", config_parse_environ
, 0, &arg_default_environment
},
652 { "Manager", "DefaultLimitCPU", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_CPU
] },
653 { "Manager", "DefaultLimitFSIZE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_FSIZE
] },
654 { "Manager", "DefaultLimitDATA", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_DATA
] },
655 { "Manager", "DefaultLimitSTACK", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_STACK
] },
656 { "Manager", "DefaultLimitCORE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_CORE
] },
657 { "Manager", "DefaultLimitRSS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RSS
] },
658 { "Manager", "DefaultLimitNOFILE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NOFILE
] },
659 { "Manager", "DefaultLimitAS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_AS
] },
660 { "Manager", "DefaultLimitNPROC", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NPROC
] },
661 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_MEMLOCK
] },
662 { "Manager", "DefaultLimitLOCKS", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_LOCKS
] },
663 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_SIGPENDING
] },
664 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_MSGQUEUE
] },
665 { "Manager", "DefaultLimitNICE", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_NICE
] },
666 { "Manager", "DefaultLimitRTPRIO", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RTPRIO
] },
667 { "Manager", "DefaultLimitRTTIME", config_parse_limit
, 0, &arg_default_rlimit
[RLIMIT_RTTIME
] },
668 { "Manager", "DefaultCPUAccounting", config_parse_bool
, 0, &arg_default_cpu_accounting
},
669 { "Manager", "DefaultBlockIOAccounting", config_parse_bool
, 0, &arg_default_blockio_accounting
},
670 { "Manager", "DefaultMemoryAccounting", config_parse_bool
, 0, &arg_default_memory_accounting
},
676 fn
= arg_running_as
== SYSTEMD_SYSTEM
? PKGSYSCONFDIR
"/system.conf" : PKGSYSCONFDIR
"/user.conf";
677 config_parse(NULL
, fn
, NULL
,
679 config_item_table_lookup
, items
,
680 false, false, true, NULL
);
685 static int parse_argv(int argc
, char *argv
[]) {
688 ARG_LOG_LEVEL
= 0x100,
698 ARG_DUMP_CONFIGURATION_ITEMS
,
705 ARG_DEFAULT_STD_OUTPUT
,
706 ARG_DEFAULT_STD_ERROR
709 static const struct option options
[] = {
710 { "log-level", required_argument
, NULL
, ARG_LOG_LEVEL
},
711 { "log-target", required_argument
, NULL
, ARG_LOG_TARGET
},
712 { "log-color", optional_argument
, NULL
, ARG_LOG_COLOR
},
713 { "log-location", optional_argument
, NULL
, ARG_LOG_LOCATION
},
714 { "unit", required_argument
, NULL
, ARG_UNIT
},
715 { "system", no_argument
, NULL
, ARG_SYSTEM
},
716 { "user", no_argument
, NULL
, ARG_USER
},
717 { "test", no_argument
, NULL
, ARG_TEST
},
718 { "no-pager", no_argument
, NULL
, ARG_NO_PAGER
},
719 { "help", no_argument
, NULL
, 'h' },
720 { "version", no_argument
, NULL
, ARG_VERSION
},
721 { "dump-configuration-items", no_argument
, NULL
, ARG_DUMP_CONFIGURATION_ITEMS
},
722 { "dump-core", optional_argument
, NULL
, ARG_DUMP_CORE
},
723 { "crash-shell", optional_argument
, NULL
, ARG_CRASH_SHELL
},
724 { "confirm-spawn", optional_argument
, NULL
, ARG_CONFIRM_SPAWN
},
725 { "show-status", optional_argument
, NULL
, ARG_SHOW_STATUS
},
726 { "deserialize", required_argument
, NULL
, ARG_DESERIALIZE
},
727 { "switched-root", no_argument
, NULL
, ARG_SWITCHED_ROOT
},
728 { "default-standard-output", required_argument
, NULL
, ARG_DEFAULT_STD_OUTPUT
, },
729 { "default-standard-error", required_argument
, NULL
, ARG_DEFAULT_STD_ERROR
, },
741 while ((c
= getopt_long(argc
, argv
, "hDbsz:", options
, NULL
)) >= 0)
746 r
= log_set_max_level_from_string(optarg
);
748 log_error("Failed to parse log level %s.", optarg
);
755 r
= log_set_target_from_string(optarg
);
757 log_error("Failed to parse log target %s.", optarg
);
766 r
= log_show_color_from_string(optarg
);
768 log_error("Failed to parse log color setting %s.", optarg
);
772 log_show_color(true);
776 case ARG_LOG_LOCATION
:
778 r
= log_show_location_from_string(optarg
);
780 log_error("Failed to parse log location setting %s.", optarg
);
784 log_show_location(true);
788 case ARG_DEFAULT_STD_OUTPUT
:
789 r
= exec_output_from_string(optarg
);
791 log_error("Failed to parse default standard output setting %s.", optarg
);
794 arg_default_std_output
= r
;
797 case ARG_DEFAULT_STD_ERROR
:
798 r
= exec_output_from_string(optarg
);
800 log_error("Failed to parse default standard error output setting %s.", optarg
);
803 arg_default_std_error
= r
;
808 r
= set_default_unit(optarg
);
810 log_error_errno(r
, "Failed to set default unit %s: %m", optarg
);
817 arg_running_as
= SYSTEMD_SYSTEM
;
821 arg_running_as
= SYSTEMD_USER
;
825 arg_action
= ACTION_TEST
;
826 if (arg_no_pager
< 0)
835 arg_action
= ACTION_VERSION
;
838 case ARG_DUMP_CONFIGURATION_ITEMS
:
839 arg_action
= ACTION_DUMP_CONFIGURATION_ITEMS
;
843 r
= optarg
? parse_boolean(optarg
) : 1;
845 log_error("Failed to parse dump core boolean %s.", optarg
);
851 case ARG_CRASH_SHELL
:
852 r
= optarg
? parse_boolean(optarg
) : 1;
854 log_error("Failed to parse crash shell boolean %s.", optarg
);
860 case ARG_CONFIRM_SPAWN
:
861 r
= optarg
? parse_boolean(optarg
) : 1;
863 log_error("Failed to parse confirm spawn boolean %s.", optarg
);
866 arg_confirm_spawn
= r
;
869 case ARG_SHOW_STATUS
:
871 r
= parse_show_status(optarg
, &arg_show_status
);
873 log_error("Failed to parse show status boolean %s.", optarg
);
877 arg_show_status
= SHOW_STATUS_YES
;
880 case ARG_DESERIALIZE
: {
884 r
= safe_atoi(optarg
, &fd
);
885 if (r
< 0 || fd
< 0) {
886 log_error("Failed to parse deserialize option %s.", optarg
);
887 return r
< 0 ? r
: -EINVAL
;
890 fd_cloexec(fd
, true);
894 log_error("Failed to open serialization fd: %m");
898 if (arg_serialization
)
899 fclose(arg_serialization
);
901 arg_serialization
= f
;
906 case ARG_SWITCHED_ROOT
:
907 arg_switched_root
= true;
911 arg_action
= ACTION_HELP
;
912 if (arg_no_pager
< 0)
917 log_set_max_level(LOG_DEBUG
);
923 /* Just to eat away the sysvinit kernel
924 * cmdline args without getopt() error
925 * messages that we'll parse in
926 * parse_proc_cmdline_word() or ignore. */
935 assert_not_reached("Unhandled option code.");
938 if (optind
< argc
&& getpid() != 1) {
939 /* Hmm, when we aren't run as init system
940 * let's complain about excess arguments */
942 log_error("Excess arguments.");
949 static int help(void) {
951 printf("%s [OPTIONS...]\n\n"
952 "Starts up and maintains the system or user services.\n\n"
953 " -h --help Show this help\n"
954 " --test Determine startup sequence, dump it and exit\n"
955 " --no-pager Do not pipe output into a pager\n"
956 " --dump-configuration-items Dump understood unit configuration items\n"
957 " --unit=UNIT Set default unit\n"
958 " --system Run a system instance, even if PID != 1\n"
959 " --user Run a user instance\n"
960 " --dump-core[=0|1] Dump core on crash\n"
961 " --crash-shell[=0|1] Run shell on crash\n"
962 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
963 " --show-status[=0|1] Show status updates on the console during bootup\n"
964 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
965 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
966 " --log-color[=0|1] Highlight important log messages\n"
967 " --log-location[=0|1] Include code location in log messages\n"
968 " --default-standard-output= Set default standard output for services\n"
969 " --default-standard-error= Set default standard error output for services\n",
970 program_invocation_short_name
);
975 static int version(void) {
976 puts(PACKAGE_STRING
);
977 puts(SYSTEMD_FEATURES
);
982 static int prepare_reexecute(Manager
*m
, FILE **_f
, FDSet
**_fds
, bool switching_root
) {
991 r
= manager_open_serialization(m
, &f
);
993 log_error_errno(r
, "Failed to create serialization file: %m");
997 /* Make sure nothing is really destructed when we shut down */
999 bus_manager_send_reloading(m
, true);
1004 log_error_errno(r
, "Failed to allocate fd set: %m");
1008 r
= manager_serialize(m
, f
, fds
, switching_root
);
1010 log_error_errno(r
, "Failed to serialize state: %m");
1014 if (fseeko(f
, 0, SEEK_SET
) < 0) {
1015 log_error("Failed to rewind serialization fd: %m");
1019 r
= fd_cloexec(fileno(f
), false);
1021 log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization: %m");
1025 r
= fdset_cloexec(fds
, false);
1027 log_error_errno(r
, "Failed to disable O_CLOEXEC for serialization fds: %m");
1045 static int bump_rlimit_nofile(struct rlimit
*saved_rlimit
) {
1049 assert(saved_rlimit
);
1051 /* Save the original RLIMIT_NOFILE so that we can reset it
1052 * later when transitioning from the initrd to the main
1053 * systemd or suchlike. */
1054 if (getrlimit(RLIMIT_NOFILE
, saved_rlimit
) < 0) {
1055 log_error("Reading RLIMIT_NOFILE failed: %m");
1059 /* Make sure forked processes get the default kernel setting */
1060 if (!arg_default_rlimit
[RLIMIT_NOFILE
]) {
1063 rl
= newdup(struct rlimit
, saved_rlimit
, 1);
1067 arg_default_rlimit
[RLIMIT_NOFILE
] = rl
;
1070 /* Bump up the resource limit for ourselves substantially */
1071 nl
.rlim_cur
= nl
.rlim_max
= 64*1024;
1072 r
= setrlimit_closest(RLIMIT_NOFILE
, &nl
);
1074 log_error_errno(r
, "Setting RLIMIT_NOFILE failed: %m");
1081 static void test_mtab(void) {
1083 static const char ok
[] =
1084 "/proc/self/mounts\0"
1086 "../proc/self/mounts\0"
1089 _cleanup_free_
char *p
= NULL
;
1092 /* Check that /etc/mtab is a symlink to the right place or
1093 * non-existing. But certainly not a file, or a symlink to
1094 * some weird place... */
1096 r
= readlink_malloc("/etc/mtab", &p
);
1099 if (r
>= 0 && nulstr_contains(ok
, p
))
1102 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1103 "This is not supported anymore. "
1104 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1107 static void test_usr(void) {
1109 /* Check that /usr is not a separate fs */
1111 if (dir_is_empty("/usr") <= 0)
1114 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1115 "Some things will probably break (sometimes even silently) in mysterious ways. "
1116 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1119 static int initialize_join_controllers(void) {
1120 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1121 * + "net_prio". We'd like to add "cpuset" to the mix, but
1122 * "cpuset" does't really work for groups with no initialized
1125 arg_join_controllers
= new(char**, 3);
1126 if (!arg_join_controllers
)
1129 arg_join_controllers
[0] = strv_new("cpu", "cpuacct", NULL
);
1130 arg_join_controllers
[1] = strv_new("net_cls", "net_prio", NULL
);
1131 arg_join_controllers
[2] = NULL
;
1133 if (!arg_join_controllers
[0] || !arg_join_controllers
[1]) {
1134 free_join_controllers();
1141 static int enforce_syscall_archs(Set
*archs
) {
1143 scmp_filter_ctx
*seccomp
;
1148 seccomp
= seccomp_init(SCMP_ACT_ALLOW
);
1152 SET_FOREACH(id
, arg_syscall_archs
, i
) {
1153 r
= seccomp_arch_add(seccomp
, PTR_TO_UINT32(id
) - 1);
1157 log_error_errno(r
, "Failed to add architecture to seccomp: %m");
1162 r
= seccomp_attr_set(seccomp
, SCMP_FLTATR_CTL_NNP
, 0);
1164 log_error_errno(r
, "Failed to unset NO_NEW_PRIVS: %m");
1168 r
= seccomp_load(seccomp
);
1170 log_error_errno(r
, "Failed to add install architecture seccomp: %m");
1173 seccomp_release(seccomp
);
1180 static int status_welcome(void) {
1181 _cleanup_free_
char *pretty_name
= NULL
, *ansi_color
= NULL
;
1184 r
= parse_env_file("/etc/os-release", NEWLINE
,
1185 "PRETTY_NAME", &pretty_name
,
1186 "ANSI_COLOR", &ansi_color
,
1189 r
= parse_env_file("/usr/lib/os-release", NEWLINE
,
1190 "PRETTY_NAME", &pretty_name
,
1191 "ANSI_COLOR", &ansi_color
,
1195 if (r
< 0 && r
!= -ENOENT
)
1196 log_warning_errno(r
, "Failed to read os-release file: %m");
1198 return status_printf(NULL
, false, false,
1199 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1200 isempty(ansi_color
) ? "1" : ansi_color
,
1201 isempty(pretty_name
) ? "Linux" : pretty_name
);
1204 static int write_container_id(void) {
1207 c
= getenv("container");
1211 return write_string_file("/run/systemd/container", c
);
1214 int main(int argc
, char *argv
[]) {
1216 int r
, retval
= EXIT_FAILURE
;
1217 usec_t before_startup
, after_startup
;
1218 char timespan
[FORMAT_TIMESPAN_MAX
];
1220 bool reexecute
= false;
1221 const char *shutdown_verb
= NULL
;
1222 dual_timestamp initrd_timestamp
= { 0ULL, 0ULL };
1223 dual_timestamp userspace_timestamp
= { 0ULL, 0ULL };
1224 dual_timestamp kernel_timestamp
= { 0ULL, 0ULL };
1225 dual_timestamp security_start_timestamp
= { 0ULL, 0ULL };
1226 dual_timestamp security_finish_timestamp
= { 0ULL, 0ULL };
1227 static char systemd
[] = "systemd";
1228 bool skip_setup
= false;
1230 bool loaded_policy
= false;
1231 bool arm_reboot_watchdog
= false;
1232 bool queue_default_job
= false;
1233 bool empty_etc
= false;
1234 char *switch_root_dir
= NULL
, *switch_root_init
= NULL
;
1235 static struct rlimit saved_rlimit_nofile
= { 0, 0 };
1236 const char *error_message
= NULL
;
1238 #ifdef HAVE_SYSV_COMPAT
1239 if (getpid() != 1 && strstr(program_invocation_short_name
, "init")) {
1240 /* This is compatibility support for SysV, where
1241 * calling init as a user is identical to telinit. */
1244 execv(SYSTEMCTL_BINARY_PATH
, argv
);
1245 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH
": %m");
1250 dual_timestamp_from_monotonic(&kernel_timestamp
, 0);
1251 dual_timestamp_get(&userspace_timestamp
);
1253 /* Determine if this is a reexecution or normal bootup. We do
1254 * the full command line parsing much later, so let's just
1255 * have a quick peek here. */
1256 if (strv_find(argv
+1, "--deserialize"))
1259 /* If we have switched root, do all the special setup
1261 if (strv_find(argv
+1, "--switched-root"))
1264 /* If we get started via the /sbin/init symlink then we are
1265 called 'init'. After a subsequent reexecution we are then
1266 called 'systemd'. That is confusing, hence let's call us
1267 systemd right-away. */
1268 program_invocation_short_name
= systemd
;
1269 prctl(PR_SET_NAME
, systemd
);
1274 log_show_color(isatty(STDERR_FILENO
) > 0);
1275 log_set_upgrade_syslog_to_journal(true);
1277 /* Disable the umask logic */
1281 if (getpid() == 1 && detect_container(NULL
) <= 0) {
1283 /* Running outside of a container as PID 1 */
1284 arg_running_as
= SYSTEMD_SYSTEM
;
1286 log_set_target(LOG_TARGET_KMSG
);
1290 initrd_timestamp
= userspace_timestamp
;
1293 mount_setup_early();
1294 dual_timestamp_get(&security_start_timestamp
);
1295 if (mac_selinux_setup(&loaded_policy
) < 0) {
1296 error_message
= "Failed to load SELinux policy";
1298 } else if (ima_setup() < 0) {
1299 error_message
= "Failed to load IMA policy";
1301 } else if (mac_smack_setup(&loaded_policy
) < 0) {
1302 error_message
= "Failed to load SMACK policy";
1305 dual_timestamp_get(&security_finish_timestamp
);
1308 if (mac_selinux_init(NULL
) < 0) {
1309 error_message
= "Failed to initialize SELinux policy";
1314 if (clock_is_localtime() > 0) {
1318 * The very first call of settimeofday() also does a time warp in the kernel.
1320 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1321 * external tools to take care of maintaining the RTC and do all adjustments.
1322 * This matches the behavior of Windows, which leaves the RTC alone if the
1323 * registry tells that the RTC runs in UTC.
1325 r
= clock_set_timezone(&min
);
1327 log_error_errno(r
, "Failed to apply local time delta, ignoring: %m");
1329 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min
);
1330 } else if (!in_initrd()) {
1332 * Do a dummy very first call to seal the kernel's time warp magic.
1334 * Do not call this this from inside the initrd. The initrd might not
1335 * carry /etc/adjtime with LOCAL, but the real system could be set up
1336 * that way. In such case, we need to delay the time-warp or the sealing
1337 * until we reach the real system.
1339 * Do no set the kernel's timezone. The concept of local time cannot
1340 * be supported reliably, the time will jump or be incorrect at every daylight
1341 * saving time change. All kernel local time concepts will be treated
1344 clock_reset_timewarp();
1348 /* Set the default for later on, but don't actually
1349 * open the logs like this for now. Note that if we
1350 * are transitioning from the initrd there might still
1351 * be journal fd open, and we shouldn't attempt
1352 * opening that before we parsed /proc/cmdline which
1353 * might redirect output elsewhere. */
1354 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG
);
1356 } else if (getpid() == 1) {
1357 /* Running inside a container, as PID 1 */
1358 arg_running_as
= SYSTEMD_SYSTEM
;
1359 log_set_target(LOG_TARGET_CONSOLE
);
1360 log_close_console(); /* force reopen of /dev/console */
1363 /* For the later on, see above... */
1364 log_set_target(LOG_TARGET_JOURNAL
);
1366 /* clear the kernel timestamp,
1367 * because we are in a container */
1368 kernel_timestamp
.monotonic
= 0ULL;
1369 kernel_timestamp
.realtime
= 0ULL;
1372 /* Running as user instance */
1373 arg_running_as
= SYSTEMD_USER
;
1374 log_set_target(LOG_TARGET_AUTO
);
1377 /* clear the kernel timestamp,
1378 * because we are not PID 1 */
1379 kernel_timestamp
.monotonic
= 0ULL;
1380 kernel_timestamp
.realtime
= 0ULL;
1383 /* Initialize default unit */
1384 r
= set_default_unit(SPECIAL_DEFAULT_TARGET
);
1386 log_emergency_errno(r
, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET
);
1387 error_message
= "Failed to set default unit";
1391 r
= initialize_join_controllers();
1393 error_message
= "Failed to initalize cgroup controllers";
1397 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1398 * /proc/$PID/fd is available. */
1399 if (getpid() == 1) {
1401 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1405 r
= mount_setup(loaded_policy
);
1407 error_message
= "Failed to mount API filesystems";
1412 /* Reset all signal handlers. */
1413 assert_se(reset_all_signal_handlers() == 0);
1415 ignore_signals(SIGNALS_IGNORE
, -1);
1417 if (parse_config_file() < 0) {
1418 error_message
= "Failed to parse config file";
1422 if (arg_running_as
== SYSTEMD_SYSTEM
) {
1423 r
= parse_proc_cmdline(parse_proc_cmdline_item
);
1425 log_warning_errno(r
, "Failed to parse kernel command line, ignoring: %m");
1428 /* Note that this also parses bits from the kernel command
1429 * line, including "debug". */
1430 log_parse_environment();
1432 if (parse_argv(argc
, argv
) < 0) {
1433 error_message
= "Failed to parse commandline arguments";
1437 if (arg_action
== ACTION_TEST
&&
1439 log_error("Don't run test mode as root.");
1443 if (arg_running_as
== SYSTEMD_USER
&&
1444 arg_action
== ACTION_RUN
&&
1446 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1450 if (arg_running_as
== SYSTEMD_SYSTEM
&&
1451 arg_action
== ACTION_RUN
&&
1452 running_in_chroot() > 0) {
1453 log_error("Cannot be run in a chroot() environment.");
1457 if (arg_action
== ACTION_TEST
)
1460 pager_open_if_enabled();
1462 if (arg_action
== ACTION_HELP
) {
1465 } else if (arg_action
== ACTION_VERSION
) {
1468 } else if (arg_action
== ACTION_DUMP_CONFIGURATION_ITEMS
) {
1469 unit_dump_config_items(stdout
);
1470 retval
= EXIT_SUCCESS
;
1472 } else if (arg_action
== ACTION_DONE
) {
1473 retval
= EXIT_SUCCESS
;
1477 if (arg_running_as
== SYSTEMD_USER
&&
1478 !getenv("XDG_RUNTIME_DIR")) {
1479 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1483 assert_se(arg_action
== ACTION_RUN
|| arg_action
== ACTION_TEST
);
1485 /* Close logging fds, in order not to confuse fdset below */
1488 /* Remember open file descriptors for later deserialization */
1489 r
= fdset_new_fill(&fds
);
1491 log_emergency_errno(r
, "Failed to allocate fd set: %m");
1492 error_message
= "Failed to allocate fd set";
1495 fdset_cloexec(fds
, true);
1497 if (arg_serialization
)
1498 assert_se(fdset_remove(fds
, fileno(arg_serialization
)) >= 0);
1500 if (arg_running_as
== SYSTEMD_SYSTEM
)
1501 /* Become a session leader if we aren't one yet. */
1504 /* Move out of the way, so that we won't block unmounts */
1505 assert_se(chdir("/") == 0);
1507 /* Reset the console, but only if this is really init and we
1508 * are freshly booted */
1509 if (arg_running_as
== SYSTEMD_SYSTEM
&& arg_action
== ACTION_RUN
) {
1511 /* If we are init, we connect stdin/stdout/stderr to
1512 * /dev/null and make sure we don't have a controlling
1516 if (getpid() == 1 && !skip_setup
)
1520 /* Open the logging devices, if possible and necessary */
1523 if (arg_show_status
== _SHOW_STATUS_UNSET
)
1524 arg_show_status
= SHOW_STATUS_YES
;
1526 /* Make sure we leave a core dump without panicing the
1528 if (getpid() == 1) {
1529 install_crash_handler();
1531 r
= mount_cgroup_controllers(arg_join_controllers
);
1536 if (arg_running_as
== SYSTEMD_SYSTEM
) {
1537 const char *virtualization
= NULL
;
1539 log_info(PACKAGE_STRING
" running in %ssystem mode. (" SYSTEMD_FEATURES
")",
1540 arg_action
== ACTION_TEST
? "test " : "" );
1542 detect_virtualization(&virtualization
);
1544 log_info("Detected virtualization '%s'.", virtualization
);
1546 write_container_id();
1548 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1551 log_info("Running in initial RAM disk.");
1553 /* Let's check whether /etc is already populated. We
1554 * don't actually really check for that, but use
1555 * /etc/machine-id as flag file. This allows container
1556 * managers and installers to provision a couple of
1557 * files already. If the container manager wants to
1558 * provision the machine ID itself it should pass
1559 * $container_uuid to PID 1.*/
1561 empty_etc
= access("/etc/machine-id", F_OK
) < 0;
1563 log_info("Running with unpopulated /etc.");
1565 _cleanup_free_
char *t
;
1567 t
= uid_to_name(getuid());
1568 log_debug(PACKAGE_STRING
" running in %suser mode for user "UID_FMT
"/%s. (" SYSTEMD_FEATURES
")",
1569 arg_action
== ACTION_TEST
? " test" : "", getuid(), t
);
1572 if (arg_running_as
== SYSTEMD_SYSTEM
&& !skip_setup
) {
1573 if (arg_show_status
> 0 || plymouth_running())
1577 machine_id_setup(NULL
);
1584 if (arg_running_as
== SYSTEMD_SYSTEM
&& arg_runtime_watchdog
> 0)
1585 watchdog_set_timeout(&arg_runtime_watchdog
);
1587 if (arg_timer_slack_nsec
!= NSEC_INFINITY
)
1588 if (prctl(PR_SET_TIMERSLACK
, arg_timer_slack_nsec
) < 0)
1589 log_error("Failed to adjust timer slack: %m");
1591 if (arg_capability_bounding_set_drop
) {
1592 r
= capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop
);
1594 log_emergency_errno(r
, "Failed to drop capability bounding set of usermode helpers: %m");
1595 error_message
= "Failed to drop capability bounding set of usermode helpers";
1598 r
= capability_bounding_set_drop(arg_capability_bounding_set_drop
, true);
1600 log_emergency_errno(r
, "Failed to drop capability bounding set: %m");
1601 error_message
= "Failed to drop capability bounding set";
1606 if (arg_syscall_archs
) {
1607 r
= enforce_syscall_archs(arg_syscall_archs
);
1609 error_message
= "Failed to set syscall architectures";
1614 if (arg_running_as
== SYSTEMD_USER
) {
1615 /* Become reaper of our children */
1616 if (prctl(PR_SET_CHILD_SUBREAPER
, 1) < 0) {
1617 log_warning("Failed to make us a subreaper: %m");
1618 if (errno
== EINVAL
)
1619 log_info("Perhaps the kernel version is too old (< 3.4?)");
1623 if (arg_running_as
== SYSTEMD_SYSTEM
) {
1624 bump_rlimit_nofile(&saved_rlimit_nofile
);
1627 r
= unit_file_preset_all(UNIT_FILE_SYSTEM
, false, NULL
, UNIT_FILE_PRESET_FULL
, false, NULL
, 0);
1629 log_warning_errno(r
, "Failed to populate /etc with preset unit settings, ignoring: %m");
1631 log_info("Populated /etc with preset unit settings.");
1635 r
= manager_new(arg_running_as
, arg_action
== ACTION_TEST
, &m
);
1637 log_emergency_errno(r
, "Failed to allocate manager object: %m");
1638 error_message
= "Failed to allocate manager object";
1642 m
->confirm_spawn
= arg_confirm_spawn
;
1643 m
->default_timer_accuracy_usec
= arg_default_timer_accuracy_usec
;
1644 m
->default_std_output
= arg_default_std_output
;
1645 m
->default_std_error
= arg_default_std_error
;
1646 m
->default_restart_usec
= arg_default_restart_usec
;
1647 m
->default_timeout_start_usec
= arg_default_timeout_start_usec
;
1648 m
->default_timeout_stop_usec
= arg_default_timeout_stop_usec
;
1649 m
->default_start_limit_interval
= arg_default_start_limit_interval
;
1650 m
->default_start_limit_burst
= arg_default_start_limit_burst
;
1651 m
->default_cpu_accounting
= arg_default_cpu_accounting
;
1652 m
->default_blockio_accounting
= arg_default_blockio_accounting
;
1653 m
->default_memory_accounting
= arg_default_memory_accounting
;
1654 m
->runtime_watchdog
= arg_runtime_watchdog
;
1655 m
->shutdown_watchdog
= arg_shutdown_watchdog
;
1657 m
->userspace_timestamp
= userspace_timestamp
;
1658 m
->kernel_timestamp
= kernel_timestamp
;
1659 m
->initrd_timestamp
= initrd_timestamp
;
1660 m
->security_start_timestamp
= security_start_timestamp
;
1661 m
->security_finish_timestamp
= security_finish_timestamp
;
1663 manager_set_default_rlimits(m
, arg_default_rlimit
);
1664 manager_environment_add(m
, NULL
, arg_default_environment
);
1665 manager_set_show_status(m
, arg_show_status
);
1666 manager_set_first_boot(m
, empty_etc
);
1668 /* Remember whether we should queue the default job */
1669 queue_default_job
= !arg_serialization
|| arg_switched_root
;
1671 before_startup
= now(CLOCK_MONOTONIC
);
1673 r
= manager_startup(m
, arg_serialization
, fds
);
1675 log_error_errno(r
, "Failed to fully start up daemon: %m");
1677 /* This will close all file descriptors that were opened, but
1678 * not claimed by any unit. */
1682 if (arg_serialization
) {
1683 fclose(arg_serialization
);
1684 arg_serialization
= NULL
;
1687 if (queue_default_job
) {
1688 _cleanup_bus_error_free_ sd_bus_error error
= SD_BUS_ERROR_NULL
;
1689 Unit
*target
= NULL
;
1690 Job
*default_unit_job
;
1692 log_debug("Activating default unit: %s", arg_default_unit
);
1694 r
= manager_load_unit(m
, arg_default_unit
, NULL
, &error
, &target
);
1696 log_error("Failed to load default target: %s", bus_error_message(&error
, r
));
1697 else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
)
1698 log_error_errno(target
->load_error
, "Failed to load default target: %m");
1699 else if (target
->load_state
== UNIT_MASKED
)
1700 log_error("Default target masked.");
1702 if (!target
|| target
->load_state
!= UNIT_LOADED
) {
1703 log_info("Trying to load rescue target...");
1705 r
= manager_load_unit(m
, SPECIAL_RESCUE_TARGET
, NULL
, &error
, &target
);
1707 log_emergency("Failed to load rescue target: %s", bus_error_message(&error
, r
));
1708 error_message
= "Failed to load rescue target";
1710 } else if (target
->load_state
== UNIT_ERROR
|| target
->load_state
== UNIT_NOT_FOUND
) {
1711 log_emergency_errno(target
->load_error
, "Failed to load rescue target: %m");
1712 error_message
= "Failed to load rescue target";
1714 } else if (target
->load_state
== UNIT_MASKED
) {
1715 log_emergency("Rescue target masked.");
1716 error_message
= "Rescue target masked";
1721 assert(target
->load_state
== UNIT_LOADED
);
1723 if (arg_action
== ACTION_TEST
) {
1724 printf("-> By units:\n");
1725 manager_dump_units(m
, stdout
, "\t");
1728 r
= manager_add_job(m
, JOB_START
, target
, JOB_ISOLATE
, false, &error
, &default_unit_job
);
1730 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error
, r
));
1732 r
= manager_add_job(m
, JOB_START
, target
, JOB_REPLACE
, false, &error
, &default_unit_job
);
1734 log_emergency("Failed to start default target: %s", bus_error_message(&error
, r
));
1735 error_message
= "Failed to start default target";
1739 log_emergency("Failed to isolate default target: %s", bus_error_message(&error
, r
));
1740 error_message
= "Failed to isolate default target";
1744 m
->default_unit_job_id
= default_unit_job
->id
;
1746 after_startup
= now(CLOCK_MONOTONIC
);
1747 log_full(arg_action
== ACTION_TEST
? LOG_INFO
: LOG_DEBUG
,
1748 "Loaded units and determined initial transaction in %s.",
1749 format_timespan(timespan
, sizeof(timespan
), after_startup
- before_startup
, 100 * USEC_PER_MSEC
));
1751 if (arg_action
== ACTION_TEST
) {
1752 printf("-> By jobs:\n");
1753 manager_dump_jobs(m
, stdout
, "\t");
1754 retval
= EXIT_SUCCESS
;
1760 r
= manager_loop(m
);
1762 log_emergency_errno(r
, "Failed to run main loop: %m");
1763 error_message
= "Failed to run main loop";
1767 switch (m
->exit_code
) {
1770 retval
= EXIT_SUCCESS
;
1774 case MANAGER_RELOAD
:
1775 log_info("Reloading.");
1776 r
= manager_reload(m
);
1778 log_error_errno(r
, "Failed to reload: %m");
1781 case MANAGER_REEXECUTE
:
1783 if (prepare_reexecute(m
, &arg_serialization
, &fds
, false) < 0) {
1784 error_message
= "Failed to prepare for reexection";
1789 log_notice("Reexecuting.");
1792 case MANAGER_SWITCH_ROOT
:
1793 /* Steal the switch root parameters */
1794 switch_root_dir
= m
->switch_root
;
1795 switch_root_init
= m
->switch_root_init
;
1796 m
->switch_root
= m
->switch_root_init
= NULL
;
1798 if (!switch_root_init
)
1799 if (prepare_reexecute(m
, &arg_serialization
, &fds
, true) < 0) {
1800 error_message
= "Failed to prepare for reexection";
1805 log_notice("Switching root.");
1808 case MANAGER_REBOOT
:
1809 case MANAGER_POWEROFF
:
1811 case MANAGER_KEXEC
: {
1812 static const char * const table
[_MANAGER_EXIT_CODE_MAX
] = {
1813 [MANAGER_REBOOT
] = "reboot",
1814 [MANAGER_POWEROFF
] = "poweroff",
1815 [MANAGER_HALT
] = "halt",
1816 [MANAGER_KEXEC
] = "kexec"
1819 assert_se(shutdown_verb
= table
[m
->exit_code
]);
1820 arm_reboot_watchdog
= m
->exit_code
== MANAGER_REBOOT
;
1822 log_notice("Shutting down.");
1827 assert_not_reached("Unknown exit code.");
1834 m
= manager_free(m
);
1836 for (j
= 0; j
< ELEMENTSOF(arg_default_rlimit
); j
++) {
1837 free(arg_default_rlimit
[j
]);
1838 arg_default_rlimit
[j
] = NULL
;
1841 free(arg_default_unit
);
1842 arg_default_unit
= NULL
;
1844 free_join_controllers();
1846 strv_free(arg_default_environment
);
1847 arg_default_environment
= NULL
;
1849 set_free(arg_syscall_archs
);
1850 arg_syscall_archs
= NULL
;
1852 mac_selinux_finish();
1856 unsigned i
, args_size
;
1858 /* Close and disarm the watchdog, so that the new
1859 * instance can reinitialize it, but doesn't get
1860 * rebooted while we do that */
1861 watchdog_close(true);
1863 /* Reset the RLIMIT_NOFILE to the kernel default, so
1864 * that the new systemd can pass the kernel default to
1865 * its child processes */
1866 if (saved_rlimit_nofile
.rlim_cur
> 0)
1867 setrlimit(RLIMIT_NOFILE
, &saved_rlimit_nofile
);
1869 if (switch_root_dir
) {
1870 /* Kill all remaining processes from the
1871 * initrd, but don't wait for them, so that we
1872 * can handle the SIGCHLD for them after
1874 broadcast_signal(SIGTERM
, false, true);
1876 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1877 r
= switch_root(switch_root_dir
, "/mnt", true, MS_MOVE
);
1879 log_error_errno(r
, "Failed to switch root, trying to continue: %m");
1882 args_size
= MAX(6, argc
+1);
1883 args
= newa(const char*, args_size
);
1885 if (!switch_root_init
) {
1888 /* First try to spawn ourselves with the right
1889 * path, and with full serialization. We do
1890 * this only if the user didn't specify an
1891 * explicit init to spawn. */
1893 assert(arg_serialization
);
1896 snprintf(sfd
, sizeof(sfd
), "%i", fileno(arg_serialization
));
1900 args
[i
++] = SYSTEMD_BINARY_PATH
;
1901 if (switch_root_dir
)
1902 args
[i
++] = "--switched-root";
1903 args
[i
++] = arg_running_as
== SYSTEMD_SYSTEM
? "--system" : "--user";
1904 args
[i
++] = "--deserialize";
1908 /* do not pass along the environment we inherit from the kernel or initrd */
1909 if (switch_root_dir
)
1912 assert(i
<= args_size
);
1913 execv(args
[0], (char* const*) args
);
1916 /* Try the fallback, if there is any, without any
1917 * serialization. We pass the original argv[] and
1918 * envp[]. (Well, modulo the ordering changes due to
1919 * getopt() in argv[], and some cleanups in envp[],
1920 * but let's hope that doesn't matter.) */
1922 if (arg_serialization
) {
1923 fclose(arg_serialization
);
1924 arg_serialization
= NULL
;
1932 /* Reopen the console */
1933 make_console_stdio();
1935 for (j
= 1, i
= 1; j
< (unsigned) argc
; j
++)
1936 args
[i
++] = argv
[j
];
1938 assert(i
<= args_size
);
1940 /* Reenable any blocked signals, especially important
1941 * if we switch from initial ramdisk to init=... */
1942 reset_all_signal_handlers();
1943 reset_signal_mask();
1945 if (switch_root_init
) {
1946 args
[0] = switch_root_init
;
1947 execv(args
[0], (char* const*) args
);
1948 log_warning("Failed to execute configured init, trying fallback: %m");
1951 args
[0] = "/sbin/init";
1952 execv(args
[0], (char* const*) args
);
1954 if (errno
== ENOENT
) {
1955 log_warning("No /sbin/init, trying fallback");
1957 args
[0] = "/bin/sh";
1959 execv(args
[0], (char* const*) args
);
1960 log_error("Failed to execute /bin/sh, giving up: %m");
1962 log_warning("Failed to execute /sbin/init, giving up: %m");
1965 if (arg_serialization
) {
1966 fclose(arg_serialization
);
1967 arg_serialization
= NULL
;
1975 #ifdef HAVE_VALGRIND_VALGRIND_H
1976 /* If we are PID 1 and running under valgrind, then let's exit
1977 * here explicitly. valgrind will only generate nice output on
1978 * exit(), not on exec(), hence let's do the former not the
1980 if (getpid() == 1 && RUNNING_ON_VALGRIND
)
1984 if (shutdown_verb
) {
1985 char log_level
[DECIMAL_STR_MAX(int) + 1];
1986 const char* command_line
[9] = {
1987 SYSTEMD_SHUTDOWN_BINARY_PATH
,
1989 "--log-level", log_level
,
1993 _cleanup_strv_free_
char **env_block
= NULL
;
1995 assert(command_line
[pos
] == NULL
);
1996 env_block
= strv_copy(environ
);
1998 snprintf(log_level
, sizeof(log_level
), "%d", log_get_max_level());
2000 switch (log_get_target()) {
2001 case LOG_TARGET_KMSG
:
2002 case LOG_TARGET_JOURNAL_OR_KMSG
:
2003 case LOG_TARGET_SYSLOG_OR_KMSG
:
2004 command_line
[pos
++] = "kmsg";
2007 case LOG_TARGET_CONSOLE
:
2009 command_line
[pos
++] = "console";
2013 if (log_get_show_color())
2014 command_line
[pos
++] = "--log-color";
2016 if (log_get_show_location())
2017 command_line
[pos
++] = "--log-location";
2019 assert(pos
< ELEMENTSOF(command_line
));
2021 if (arm_reboot_watchdog
&& arg_shutdown_watchdog
> 0) {
2024 /* If we reboot let's set the shutdown
2025 * watchdog and tell the shutdown binary to
2026 * repeatedly ping it */
2027 watchdog_set_timeout(&arg_shutdown_watchdog
);
2028 watchdog_close(false);
2030 /* Tell the binary how often to ping, ignore failure */
2031 if (asprintf(&e
, "WATCHDOG_USEC="USEC_FMT
, arg_shutdown_watchdog
) > 0)
2032 strv_push(&env_block
, e
);
2034 watchdog_close(true);
2036 /* Avoid the creation of new processes forked by the
2037 * kernel; at this point, we will not listen to the
2039 if (detect_container(NULL
) <= 0)
2040 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER
);
2042 execve(SYSTEMD_SHUTDOWN_BINARY_PATH
, (char **) command_line
, env_block
);
2043 log_error("Failed to execute shutdown binary, %s: %m",
2044 getpid() == 1 ? "freezing" : "quitting");
2047 if (getpid() == 1) {
2049 manager_status_printf(NULL
, STATUS_TYPE_EMERGENCY
,
2050 ANSI_HIGHLIGHT_RED_ON
"!!!!!!" ANSI_HIGHLIGHT_OFF
,
2051 "%s, freezing.", error_message
);