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/>.
22 #include <dbus/dbus.h>
28 #include <sys/types.h>
34 #include <sys/prctl.h>
38 #include "load-fragment.h"
41 #include "conf-parser.h"
42 #include "bus-errors.h"
51 #include "mount-setup.h"
52 #include "loopback-setup.h"
53 #include "kmod-setup.h"
54 #include "hostname-setup.h"
55 #include "machine-id-setup.h"
56 #include "locale-setup.h"
57 #include "selinux-setup.h"
58 #include "ima-setup.h"
64 ACTION_DUMP_CONFIGURATION_ITEMS
,
66 } arg_action
= ACTION_RUN
;
68 static char *arg_default_unit
= NULL
;
69 static ManagerRunningAs arg_running_as
= _MANAGER_RUNNING_AS_INVALID
;
71 static bool arg_dump_core
= true;
72 static bool arg_crash_shell
= false;
73 static int arg_crash_chvt
= -1;
74 static bool arg_confirm_spawn
= false;
75 static bool arg_show_status
= true;
76 #ifdef HAVE_SYSV_COMPAT
77 static bool arg_sysv_console
= true;
79 static char **arg_default_controllers
= NULL
;
80 static char ***arg_join_controllers
= NULL
;
81 static ExecOutput arg_default_std_output
= EXEC_OUTPUT_JOURNAL
;
82 static ExecOutput arg_default_std_error
= EXEC_OUTPUT_INHERIT
;
83 static usec_t arg_runtime_watchdog
= 0;
84 static usec_t arg_shutdown_watchdog
= 10 * USEC_PER_MINUTE
;
86 static FILE* serialization
= NULL
;
88 static void nop_handler(int sig
) {
91 _noreturn_
static void crash(int sig
) {
94 log_error("Caught <%s>, not dumping core.", signal_to_string(sig
));
99 /* We want to wait for the core process, hence let's enable SIGCHLD */
101 sa
.sa_handler
= nop_handler
;
102 sa
.sa_flags
= SA_NOCLDSTOP
|SA_RESTART
;
103 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
105 if ((pid
= fork()) < 0)
106 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig
), strerror(errno
));
111 /* Enable default signal handler for core dump */
113 sa
.sa_handler
= SIG_DFL
;
114 assert_se(sigaction(sig
, &sa
, NULL
) == 0);
116 /* Don't limit the core dump size */
118 rl
.rlim_cur
= RLIM_INFINITY
;
119 rl
.rlim_max
= RLIM_INFINITY
;
120 setrlimit(RLIMIT_CORE
, &rl
);
122 /* Just to be sure... */
123 assert_se(chdir("/") == 0);
125 /* Raise the signal again */
128 assert_not_reached("We shouldn't be here...");
135 /* Order things nicely. */
136 if ((r
= wait_for_terminate(pid
, &status
)) < 0)
137 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig
), strerror(-r
));
138 else if (status
.si_code
!= CLD_DUMPED
)
139 log_error("Caught <%s>, core dump failed.", signal_to_string(sig
));
141 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig
), (unsigned long) pid
);
146 chvt(arg_crash_chvt
);
148 if (arg_crash_shell
) {
152 log_info("Executing crash shell in 10s...");
155 /* Let the kernel reap children for us */
157 sa
.sa_handler
= SIG_IGN
;
158 sa
.sa_flags
= SA_NOCLDSTOP
|SA_NOCLDWAIT
|SA_RESTART
;
159 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
161 if ((pid
= fork()) < 0)
162 log_error("Failed to fork off crash shell: %s", strerror(errno
));
166 if ((fd
= acquire_terminal("/dev/console", false, true, true)) < 0)
167 log_error("Failed to acquire terminal: %s", strerror(-fd
));
168 else if ((r
= make_stdio(fd
)) < 0)
169 log_error("Failed to duplicate terminal fd: %s", strerror(-r
));
171 execl("/bin/sh", "/bin/sh", NULL
);
173 log_error("execl() failed: %s", strerror(errno
));
177 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid
);
180 log_info("Freezing execution.");
184 static void install_crash_handler(void) {
189 sa
.sa_handler
= crash
;
190 sa
.sa_flags
= SA_NODEFER
;
192 sigaction_many(&sa
, SIGNALS_CRASH_HANDLER
, -1);
195 static int console_setup(bool do_reset
) {
198 /* If we are init, we connect stdin/stdout/stderr to /dev/null
199 * and make sure we don't have a controlling tty. */
206 tty_fd
= open_terminal("/dev/console", O_WRONLY
|O_NOCTTY
|O_CLOEXEC
);
208 log_error("Failed to open /dev/console: %s", strerror(-tty_fd
));
212 /* We don't want to force text mode.
213 * plymouth may be showing pictures already from initrd. */
214 r
= reset_terminal_fd(tty_fd
, false);
216 log_error("Failed to reset /dev/console: %s", strerror(-r
));
218 close_nointr_nofail(tty_fd
);
222 static int set_default_unit(const char *u
) {
227 if (!(c
= strdup(u
)))
230 free(arg_default_unit
);
231 arg_default_unit
= c
;
235 static int parse_proc_cmdline_word(const char *word
) {
237 static const char * const rlmap
[] = {
238 "emergency", SPECIAL_EMERGENCY_TARGET
,
239 "-b", SPECIAL_EMERGENCY_TARGET
,
240 "single", SPECIAL_RESCUE_TARGET
,
241 "-s", SPECIAL_RESCUE_TARGET
,
242 "s", SPECIAL_RESCUE_TARGET
,
243 "S", SPECIAL_RESCUE_TARGET
,
244 "1", SPECIAL_RESCUE_TARGET
,
245 "2", SPECIAL_RUNLEVEL2_TARGET
,
246 "3", SPECIAL_RUNLEVEL3_TARGET
,
247 "4", SPECIAL_RUNLEVEL4_TARGET
,
248 "5", SPECIAL_RUNLEVEL5_TARGET
,
253 if (startswith(word
, "systemd.unit="))
254 return set_default_unit(word
+ 13);
256 else if (startswith(word
, "systemd.log_target=")) {
258 if (log_set_target_from_string(word
+ 19) < 0)
259 log_warning("Failed to parse log target %s. Ignoring.", word
+ 19);
261 } else if (startswith(word
, "systemd.log_level=")) {
263 if (log_set_max_level_from_string(word
+ 18) < 0)
264 log_warning("Failed to parse log level %s. Ignoring.", word
+ 18);
266 } else if (startswith(word
, "systemd.log_color=")) {
268 if (log_show_color_from_string(word
+ 18) < 0)
269 log_warning("Failed to parse log color setting %s. Ignoring.", word
+ 18);
271 } else if (startswith(word
, "systemd.log_location=")) {
273 if (log_show_location_from_string(word
+ 21) < 0)
274 log_warning("Failed to parse log location setting %s. Ignoring.", word
+ 21);
276 } else if (startswith(word
, "systemd.dump_core=")) {
279 if ((r
= parse_boolean(word
+ 18)) < 0)
280 log_warning("Failed to parse dump core switch %s. Ignoring.", word
+ 18);
284 } else if (startswith(word
, "systemd.crash_shell=")) {
287 if ((r
= parse_boolean(word
+ 20)) < 0)
288 log_warning("Failed to parse crash shell switch %s. Ignoring.", word
+ 20);
292 } else if (startswith(word
, "systemd.confirm_spawn=")) {
295 if ((r
= parse_boolean(word
+ 22)) < 0)
296 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word
+ 22);
298 arg_confirm_spawn
= r
;
300 } else if (startswith(word
, "systemd.crash_chvt=")) {
303 if (safe_atoi(word
+ 19, &k
) < 0)
304 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word
+ 19);
308 } else if (startswith(word
, "systemd.show_status=")) {
311 if ((r
= parse_boolean(word
+ 20)) < 0)
312 log_warning("Failed to parse show status switch %s. Ignoring.", word
+ 20);
315 } else if (startswith(word
, "systemd.default_standard_output=")) {
318 if ((r
= exec_output_from_string(word
+ 32)) < 0)
319 log_warning("Failed to parse default standard output switch %s. Ignoring.", word
+ 32);
321 arg_default_std_output
= r
;
322 } else if (startswith(word
, "systemd.default_standard_error=")) {
325 if ((r
= exec_output_from_string(word
+ 31)) < 0)
326 log_warning("Failed to parse default standard error switch %s. Ignoring.", word
+ 31);
328 arg_default_std_error
= r
;
329 } else if (startswith(word
, "systemd.setenv=")) {
333 cenv
= strdup(word
+ 15);
337 eq
= strchr(cenv
, '=');
341 log_warning("unsetenv failed %s. Ignoring.", strerror(errno
));
344 r
= setenv(cenv
, eq
+ 1, 1);
346 log_warning("setenv failed %s. Ignoring.", strerror(errno
));
349 #ifdef HAVE_SYSV_COMPAT
350 } else if (startswith(word
, "systemd.sysv_console=")) {
353 if ((r
= parse_boolean(word
+ 21)) < 0)
354 log_warning("Failed to parse SysV console switch %s. Ignoring.", word
+ 20);
356 arg_sysv_console
= r
;
359 } else if (startswith(word
, "systemd.")) {
361 log_warning("Unknown kernel switch %s. Ignoring.", word
);
363 log_info("Supported kernel switches:\n"
364 "systemd.unit=UNIT Default unit to start\n"
365 "systemd.dump_core=0|1 Dump core on crash\n"
366 "systemd.crash_shell=0|1 Run shell on crash\n"
367 "systemd.crash_chvt=N Change to VT #N on crash\n"
368 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
369 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
370 #ifdef HAVE_SYSV_COMPAT
371 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
373 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
375 "systemd.log_level=LEVEL Log level\n"
376 "systemd.log_color=0|1 Highlight important log messages\n"
377 "systemd.log_location=0|1 Include code location in log messages\n"
378 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
379 " Set default log output for services\n"
380 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
381 " Set default log error output for services\n");
383 } else if (streq(word
, "quiet")) {
384 arg_show_status
= false;
385 #ifdef HAVE_SYSV_COMPAT
386 arg_sysv_console
= false;
391 /* SysV compatibility */
392 for (i
= 0; i
< ELEMENTSOF(rlmap
); i
+= 2)
393 if (streq(word
, rlmap
[i
]))
394 return set_default_unit(rlmap
[i
+1]);
400 static int config_parse_level2(
401 const char *filename
,
414 log_set_max_level_from_string(rvalue
);
418 static int config_parse_target(
419 const char *filename
,
432 log_set_target_from_string(rvalue
);
436 static int config_parse_color(
437 const char *filename
,
450 log_show_color_from_string(rvalue
);
454 static int config_parse_location(
455 const char *filename
,
468 log_show_location_from_string(rvalue
);
472 static int config_parse_cpu_affinity2(
473 const char *filename
,
492 FOREACH_WORD_QUOTED(w
, l
, rvalue
, state
) {
497 if (!(t
= strndup(w
, l
)))
500 r
= safe_atou(t
, &cpu
);
504 if (!(c
= cpu_set_malloc(&ncpus
)))
507 if (r
< 0 || cpu
>= ncpus
) {
508 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename
, line
, rvalue
);
513 CPU_SET_S(cpu
, CPU_ALLOC_SIZE(ncpus
), c
);
517 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus
), c
) < 0)
518 log_warning("Failed to set CPU affinity: %m");
526 static void strv_free_free(char ***l
) {
538 static void free_join_controllers(void) {
539 if (!arg_join_controllers
)
542 strv_free_free(arg_join_controllers
);
543 arg_join_controllers
= NULL
;
546 static int config_parse_join_controllers(
547 const char *filename
,
564 free_join_controllers();
566 FOREACH_WORD_QUOTED(w
, length
, rvalue
, state
) {
569 s
= strndup(w
, length
);
573 l
= strv_split(s
, ",");
578 if (strv_length(l
) <= 1) {
583 if (!arg_join_controllers
) {
584 arg_join_controllers
= new(char**, 2);
585 if (!arg_join_controllers
) {
590 arg_join_controllers
[0] = l
;
591 arg_join_controllers
[1] = NULL
;
598 t
= new0(char**, n
+2);
606 for (a
= arg_join_controllers
; *a
; a
++) {
608 if (strv_overlap(*a
, l
)) {
611 c
= strv_merge(*a
, l
);
634 t
[n
++] = strv_uniq(l
);
636 strv_free_free(arg_join_controllers
);
637 arg_join_controllers
= t
;
644 static int parse_config_file(void) {
646 const ConfigTableItem items
[] = {
647 { "Manager", "LogLevel", config_parse_level2
, 0, NULL
},
648 { "Manager", "LogTarget", config_parse_target
, 0, NULL
},
649 { "Manager", "LogColor", config_parse_color
, 0, NULL
},
650 { "Manager", "LogLocation", config_parse_location
, 0, NULL
},
651 { "Manager", "DumpCore", config_parse_bool
, 0, &arg_dump_core
},
652 { "Manager", "CrashShell", config_parse_bool
, 0, &arg_crash_shell
},
653 { "Manager", "ShowStatus", config_parse_bool
, 0, &arg_show_status
},
654 #ifdef HAVE_SYSV_COMPAT
655 { "Manager", "SysVConsole", config_parse_bool
, 0, &arg_sysv_console
},
657 { "Manager", "CrashChVT", config_parse_int
, 0, &arg_crash_chvt
},
658 { "Manager", "CPUAffinity", config_parse_cpu_affinity2
, 0, NULL
},
659 { "Manager", "DefaultControllers", config_parse_strv
, 0, &arg_default_controllers
},
660 { "Manager", "DefaultStandardOutput", config_parse_output
, 0, &arg_default_std_output
},
661 { "Manager", "DefaultStandardError", config_parse_output
, 0, &arg_default_std_error
},
662 { "Manager", "JoinControllers", config_parse_join_controllers
, 0, &arg_join_controllers
},
663 { "Manager", "RuntimeWatchdogSec", config_parse_usec
, 0, &arg_runtime_watchdog
},
664 { "Manager", "ShutdownWatchdogSec", config_parse_usec
, 0, &arg_shutdown_watchdog
},
665 { NULL
, NULL
, NULL
, 0, NULL
}
672 fn
= arg_running_as
== MANAGER_SYSTEM
? SYSTEM_CONFIG_FILE
: USER_CONFIG_FILE
;
678 log_warning("Failed to open configuration file '%s': %m", fn
);
682 r
= config_parse(fn
, f
, "Manager\0", config_item_table_lookup
, (void*) items
, false, NULL
);
684 log_warning("Failed to parse configuration file: %s", strerror(-r
));
691 static int parse_proc_cmdline(void) {
692 char *line
, *w
, *state
;
696 /* Don't read /proc/cmdline if we are in a container, since
697 * that is only relevant for the host system */
698 if (detect_container(NULL
) > 0)
701 if ((r
= read_one_line_file("/proc/cmdline", &line
)) < 0) {
702 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r
));
706 FOREACH_WORD_QUOTED(w
, l
, line
, state
) {
709 if (!(word
= strndup(w
, l
))) {
714 r
= parse_proc_cmdline_word(word
);
728 static int parse_argv(int argc
, char *argv
[]) {
731 ARG_LOG_LEVEL
= 0x100,
739 ARG_DUMP_CONFIGURATION_ITEMS
,
747 ARG_DEFAULT_STD_OUTPUT
,
748 ARG_DEFAULT_STD_ERROR
751 static const struct option options
[] = {
752 { "log-level", required_argument
, NULL
, ARG_LOG_LEVEL
},
753 { "log-target", required_argument
, NULL
, ARG_LOG_TARGET
},
754 { "log-color", optional_argument
, NULL
, ARG_LOG_COLOR
},
755 { "log-location", optional_argument
, NULL
, ARG_LOG_LOCATION
},
756 { "unit", required_argument
, NULL
, ARG_UNIT
},
757 { "system", no_argument
, NULL
, ARG_SYSTEM
},
758 { "user", no_argument
, NULL
, ARG_USER
},
759 { "test", no_argument
, NULL
, ARG_TEST
},
760 { "help", no_argument
, NULL
, 'h' },
761 { "dump-configuration-items", no_argument
, NULL
, ARG_DUMP_CONFIGURATION_ITEMS
},
762 { "dump-core", no_argument
, NULL
, ARG_DUMP_CORE
},
763 { "crash-shell", no_argument
, NULL
, ARG_CRASH_SHELL
},
764 { "confirm-spawn", no_argument
, NULL
, ARG_CONFIRM_SPAWN
},
765 { "show-status", optional_argument
, NULL
, ARG_SHOW_STATUS
},
766 #ifdef HAVE_SYSV_COMPAT
767 { "sysv-console", optional_argument
, NULL
, ARG_SYSV_CONSOLE
},
769 { "deserialize", required_argument
, NULL
, ARG_DESERIALIZE
},
770 { "introspect", optional_argument
, NULL
, ARG_INTROSPECT
},
771 { "default-standard-output", required_argument
, NULL
, ARG_DEFAULT_STD_OUTPUT
, },
772 { "default-standard-error", required_argument
, NULL
, ARG_DEFAULT_STD_ERROR
, },
784 while ((c
= getopt_long(argc
, argv
, "hDbsz:", options
, NULL
)) >= 0)
789 if ((r
= log_set_max_level_from_string(optarg
)) < 0) {
790 log_error("Failed to parse log level %s.", optarg
);
798 if ((r
= log_set_target_from_string(optarg
)) < 0) {
799 log_error("Failed to parse log target %s.", optarg
);
808 if ((r
= log_show_color_from_string(optarg
)) < 0) {
809 log_error("Failed to parse log color setting %s.", optarg
);
813 log_show_color(true);
817 case ARG_LOG_LOCATION
:
820 if ((r
= log_show_location_from_string(optarg
)) < 0) {
821 log_error("Failed to parse log location setting %s.", optarg
);
825 log_show_location(true);
829 case ARG_DEFAULT_STD_OUTPUT
:
831 if ((r
= exec_output_from_string(optarg
)) < 0) {
832 log_error("Failed to parse default standard output setting %s.", optarg
);
835 arg_default_std_output
= r
;
838 case ARG_DEFAULT_STD_ERROR
:
840 if ((r
= exec_output_from_string(optarg
)) < 0) {
841 log_error("Failed to parse default standard error output setting %s.", optarg
);
844 arg_default_std_error
= r
;
849 if ((r
= set_default_unit(optarg
)) < 0) {
850 log_error("Failed to set default unit %s: %s", optarg
, strerror(-r
));
857 arg_running_as
= MANAGER_SYSTEM
;
861 arg_running_as
= MANAGER_USER
;
865 arg_action
= ACTION_TEST
;
868 case ARG_DUMP_CONFIGURATION_ITEMS
:
869 arg_action
= ACTION_DUMP_CONFIGURATION_ITEMS
;
873 arg_dump_core
= true;
876 case ARG_CRASH_SHELL
:
877 arg_crash_shell
= true;
880 case ARG_CONFIRM_SPAWN
:
881 arg_confirm_spawn
= true;
884 case ARG_SHOW_STATUS
:
887 if ((r
= parse_boolean(optarg
)) < 0) {
888 log_error("Failed to show status boolean %s.", optarg
);
893 arg_show_status
= true;
895 #ifdef HAVE_SYSV_COMPAT
896 case ARG_SYSV_CONSOLE
:
899 if ((r
= parse_boolean(optarg
)) < 0) {
900 log_error("Failed to SysV console boolean %s.", optarg
);
903 arg_sysv_console
= r
;
905 arg_sysv_console
= true;
909 case ARG_DESERIALIZE
: {
913 if ((r
= safe_atoi(optarg
, &fd
)) < 0 || fd
< 0) {
914 log_error("Failed to parse deserialize option %s.", optarg
);
918 if (!(f
= fdopen(fd
, "r"))) {
919 log_error("Failed to open serialization fd: %m");
924 fclose(serialization
);
931 case ARG_INTROSPECT
: {
932 const char * const * i
= NULL
;
934 for (i
= bus_interface_table
; *i
; i
+= 2)
935 if (!optarg
|| streq(i
[0], optarg
)) {
936 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
939 fputs("</node>\n", stdout
);
946 log_error("Unknown interface %s.", optarg
);
948 arg_action
= ACTION_DONE
;
953 arg_action
= ACTION_HELP
;
957 log_set_max_level(LOG_DEBUG
);
963 /* Just to eat away the sysvinit kernel
964 * cmdline args without getopt() error
965 * messages that we'll parse in
966 * parse_proc_cmdline_word() or ignore. */
971 log_error("Unknown option code %c", c
);
978 if (optind
< argc
&& getpid() != 1) {
979 /* Hmm, when we aren't run as init system
980 * let's complain about excess arguments */
982 log_error("Excess arguments.");
986 if (detect_container(NULL
) > 0) {
989 /* All /proc/cmdline arguments the kernel didn't
990 * understand it passed to us. We're not really
991 * interested in that usually since /proc/cmdline is
992 * more interesting and complete. With one exception:
993 * if we are run in a container /proc/cmdline is not
994 * relevant for the container, hence we rely on argv[]
997 for (a
= argv
; a
< argv
+ argc
; a
++)
998 if ((r
= parse_proc_cmdline_word(*a
)) < 0)
1005 static int help(void) {
1007 printf("%s [OPTIONS...]\n\n"
1008 "Starts up and maintains the system or user services.\n\n"
1009 " -h --help Show this help\n"
1010 " --test Determine startup sequence, dump it and exit\n"
1011 " --dump-configuration-items Dump understood unit configuration items\n"
1012 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1013 " --unit=UNIT Set default unit\n"
1014 " --system Run a system instance, even if PID != 1\n"
1015 " --user Run a user instance\n"
1016 " --dump-core Dump core on crash\n"
1017 " --crash-shell Run shell on crash\n"
1018 " --confirm-spawn Ask for confirmation when spawning processes\n"
1019 " --show-status[=0|1] Show status updates on the console during bootup\n"
1020 #ifdef HAVE_SYSV_COMPAT
1021 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
1023 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1024 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1025 " --log-color[=0|1] Highlight important log messages\n"
1026 " --log-location[=0|1] Include code location in log messages\n"
1027 " --default-standard-output= Set default standard output for services\n"
1028 " --default-standard-error= Set default standard error output for services\n",
1029 program_invocation_short_name
);
1034 static int prepare_reexecute(Manager
*m
, FILE **_f
, FDSet
**_fds
) {
1043 /* Make sure nothing is really destructed when we shut down */
1046 if ((r
= manager_open_serialization(m
, &f
)) < 0) {
1047 log_error("Failed to create serialization file: %s", strerror(-r
));
1051 if (!(fds
= fdset_new())) {
1053 log_error("Failed to allocate fd set: %s", strerror(-r
));
1057 if ((r
= manager_serialize(m
, f
, fds
)) < 0) {
1058 log_error("Failed to serialize state: %s", strerror(-r
));
1062 if (fseeko(f
, 0, SEEK_SET
) < 0) {
1063 log_error("Failed to rewind serialization fd: %m");
1067 if ((r
= fd_cloexec(fileno(f
), false)) < 0) {
1068 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r
));
1072 if ((r
= fdset_cloexec(fds
, false)) < 0) {
1073 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r
));
1091 static struct dual_timestamp
* parse_initrd_timestamp(struct dual_timestamp
*t
) {
1093 unsigned long long a
, b
;
1097 e
= getenv("RD_TIMESTAMP");
1101 if (sscanf(e
, "%llu %llu", &a
, &b
) != 2)
1104 t
->realtime
= (usec_t
) a
;
1105 t
->monotonic
= (usec_t
) b
;
1110 static void test_mtab(void) {
1113 /* Check that /etc/mtab is a symlink */
1115 if (readlink_malloc("/etc/mtab", &p
) >= 0) {
1118 b
= streq(p
, "/proc/self/mounts") || streq(p
, "/proc/mounts");
1125 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1126 "This is not supported anymore. "
1127 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1130 static void test_usr(void) {
1132 /* Check that /usr is not a separate fs */
1134 if (dir_is_empty("/usr") <= 0)
1137 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1138 "Some things will probably break (sometimes even silently) in mysterious ways. "
1139 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1142 static void test_cgroups(void) {
1144 if (access("/proc/cgroups", F_OK
) >= 0)
1147 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1148 "Systems without control groups are not supported. "
1149 "We will now sleep for 10s, and then continue boot-up. "
1150 "Expect breakage and please do not file bugs. "
1151 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1152 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1157 int main(int argc
, char *argv
[]) {
1159 int r
, retval
= EXIT_FAILURE
;
1160 usec_t before_startup
, after_startup
;
1161 char timespan
[FORMAT_TIMESPAN_MAX
];
1163 bool reexecute
= false;
1164 const char *shutdown_verb
= NULL
;
1165 dual_timestamp initrd_timestamp
= { 0ULL, 0ULL };
1166 static char systemd
[] = "systemd";
1167 bool is_reexec
= false;
1169 bool loaded_policy
= false;
1170 bool arm_reboot_watchdog
= false;
1172 #ifdef HAVE_SYSV_COMPAT
1173 if (getpid() != 1 && strstr(program_invocation_short_name
, "init")) {
1174 /* This is compatibility support for SysV, where
1175 * calling init as a user is identical to telinit. */
1178 execv(SYSTEMCTL_BINARY_PATH
, argv
);
1179 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH
": %m");
1184 /* Determine if this is a reexecution or normal bootup. We do
1185 * the full command line parsing much later, so let's just
1186 * have a quick peek here. */
1188 for (j
= 1; j
< argc
; j
++)
1189 if (streq(argv
[j
], "--deserialize")) {
1194 /* If we get started via the /sbin/init symlink then we are
1195 called 'init'. After a subsequent reexecution we are then
1196 called 'systemd'. That is confusing, hence let's call us
1197 systemd right-away. */
1198 program_invocation_short_name
= systemd
;
1199 prctl(PR_SET_NAME
, systemd
);
1204 log_show_color(isatty(STDERR_FILENO
) > 0);
1205 log_show_location(false);
1206 log_set_max_level(LOG_INFO
);
1208 if (getpid() == 1) {
1209 arg_running_as
= MANAGER_SYSTEM
;
1210 log_set_target(detect_container(NULL
) > 0 ? LOG_TARGET_JOURNAL
: LOG_TARGET_JOURNAL_OR_KMSG
);
1213 if (selinux_setup(&loaded_policy
) < 0)
1215 if (ima_setup() < 0)
1221 if (label_init(NULL
) < 0)
1225 if (hwclock_is_localtime() > 0) {
1228 r
= hwclock_apply_localtime_delta(&min
);
1230 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r
));
1232 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min
);
1236 arg_running_as
= MANAGER_USER
;
1237 log_set_target(LOG_TARGET_AUTO
);
1241 /* Initialize default unit */
1242 if (set_default_unit(SPECIAL_DEFAULT_TARGET
) < 0)
1245 /* By default, mount "cpu" and "cpuacct" together */
1246 arg_join_controllers
= new(char**, 2);
1247 if (!arg_join_controllers
)
1250 arg_join_controllers
[0] = strv_new("cpu", "cpuacct", NULL
);
1251 arg_join_controllers
[1] = NULL
;
1253 if (!arg_join_controllers
[0])
1256 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1257 * /proc/$PID/fd is available. */
1258 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1259 r
= mount_setup(loaded_policy
);
1264 /* Reset all signal handlers. */
1265 assert_se(reset_all_signal_handlers() == 0);
1267 /* If we are init, we can block sigkill. Yay. */
1268 ignore_signals(SIGNALS_IGNORE
, -1);
1270 if (parse_config_file() < 0)
1273 if (arg_running_as
== MANAGER_SYSTEM
)
1274 if (parse_proc_cmdline() < 0)
1277 log_parse_environment();
1279 if (parse_argv(argc
, argv
) < 0)
1282 if (arg_action
== ACTION_TEST
&& geteuid() == 0) {
1283 log_error("Don't run test mode as root.");
1287 if (arg_running_as
== MANAGER_SYSTEM
&&
1288 arg_action
== ACTION_RUN
&&
1289 running_in_chroot() > 0) {
1290 log_error("Cannot be run in a chroot() environment.");
1294 if (arg_action
== ACTION_HELP
) {
1297 } else if (arg_action
== ACTION_DUMP_CONFIGURATION_ITEMS
) {
1298 unit_dump_config_items(stdout
);
1299 retval
= EXIT_SUCCESS
;
1301 } else if (arg_action
== ACTION_DONE
) {
1302 retval
= EXIT_SUCCESS
;
1306 assert_se(arg_action
== ACTION_RUN
|| arg_action
== ACTION_TEST
);
1308 /* Close logging fds, in order not to confuse fdset below */
1311 /* Remember open file descriptors for later deserialization */
1312 if (serialization
) {
1313 r
= fdset_new_fill(&fds
);
1315 log_error("Failed to allocate fd set: %s", strerror(-r
));
1319 assert_se(fdset_remove(fds
, fileno(serialization
)) >= 0);
1321 close_all_fds(NULL
, 0);
1323 /* Set up PATH unless it is already set */
1325 #ifdef HAVE_SPLIT_USR
1326 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1328 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1330 arg_running_as
== MANAGER_SYSTEM
);
1332 if (arg_running_as
== MANAGER_SYSTEM
) {
1333 /* Parse the data passed to us. We leave this
1334 * variables set, but the manager later on will not
1335 * pass them on to our children. */
1336 parse_initrd_timestamp(&initrd_timestamp
);
1338 /* Unset some environment variables passed in from the
1339 * kernel that don't really make sense for us. */
1343 /* When we are invoked by a shell, these might be set,
1344 * but make little sense to pass on */
1349 /* When we are invoked by a tool chroot-like such as
1350 * nspawn, these might be set, but make little sense
1353 unsetenv("LOGNAME");
1355 /* All other variables are left as is, so that clients
1356 * can still read them via /proc/1/environ */
1359 /* Move out of the way, so that we won't block unmounts */
1360 assert_se(chdir("/") == 0);
1362 if (arg_running_as
== MANAGER_SYSTEM
) {
1363 /* Become a session leader if we aren't one yet. */
1366 /* Disable the umask logic */
1370 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1371 dbus_connection_set_change_sigpipe(FALSE
);
1373 /* Reset the console, but only if this is really init and we
1374 * are freshly booted */
1375 if (arg_running_as
== MANAGER_SYSTEM
&& arg_action
== ACTION_RUN
) {
1376 console_setup(getpid() == 1 && !is_reexec
);
1380 /* Open the logging devices, if possible and necessary */
1383 /* Make sure we leave a core dump without panicing the
1386 install_crash_handler();
1388 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1389 r
= mount_cgroup_controllers(arg_join_controllers
);
1394 log_full(arg_running_as
== MANAGER_SYSTEM
? LOG_INFO
: LOG_DEBUG
,
1395 PACKAGE_STRING
" running in %s mode. (" SYSTEMD_FEATURES
"; " DISTRIBUTION
")", manager_running_as_to_string(arg_running_as
));
1397 if (arg_running_as
== MANAGER_SYSTEM
&& !is_reexec
) {
1400 if (arg_show_status
|| plymouth_running())
1413 if (arg_running_as
== MANAGER_SYSTEM
&& arg_runtime_watchdog
> 0)
1414 watchdog_set_timeout(&arg_runtime_watchdog
);
1416 r
= manager_new(arg_running_as
, &m
);
1418 log_error("Failed to allocate manager object: %s", strerror(-r
));
1422 m
->confirm_spawn
= arg_confirm_spawn
;
1423 #ifdef HAVE_SYSV_COMPAT
1424 m
->sysv_console
= arg_sysv_console
;
1426 m
->default_std_output
= arg_default_std_output
;
1427 m
->default_std_error
= arg_default_std_error
;
1428 m
->runtime_watchdog
= arg_runtime_watchdog
;
1429 m
->shutdown_watchdog
= arg_shutdown_watchdog
;
1431 if (dual_timestamp_is_set(&initrd_timestamp
))
1432 m
->initrd_timestamp
= initrd_timestamp
;
1434 if (arg_default_controllers
)
1435 manager_set_default_controllers(m
, arg_default_controllers
);
1437 manager_set_show_status(m
, arg_show_status
);
1439 before_startup
= now(CLOCK_MONOTONIC
);
1441 r
= manager_startup(m
, serialization
, fds
);
1443 log_error("Failed to fully start up daemon: %s", strerror(-r
));
1446 /* This will close all file descriptors that were opened, but
1447 * not claimed by any unit. */
1453 if (serialization
) {
1454 fclose(serialization
);
1455 serialization
= NULL
;
1458 Unit
*target
= NULL
;
1459 Job
*default_unit_job
;
1461 dbus_error_init(&error
);
1463 log_debug("Activating default unit: %s", arg_default_unit
);
1465 r
= manager_load_unit(m
, arg_default_unit
, NULL
, &error
, &target
);
1467 log_error("Failed to load default target: %s", bus_error(&error
, r
));
1468 dbus_error_free(&error
);
1469 } else if (target
->load_state
== UNIT_ERROR
)
1470 log_error("Failed to load default target: %s", strerror(-target
->load_error
));
1471 else if (target
->load_state
== UNIT_MASKED
)
1472 log_error("Default target masked.");
1474 if (!target
|| target
->load_state
!= UNIT_LOADED
) {
1475 log_info("Trying to load rescue target...");
1477 r
= manager_load_unit(m
, SPECIAL_RESCUE_TARGET
, NULL
, &error
, &target
);
1479 log_error("Failed to load rescue target: %s", bus_error(&error
, r
));
1480 dbus_error_free(&error
);
1482 } else if (target
->load_state
== UNIT_ERROR
) {
1483 log_error("Failed to load rescue target: %s", strerror(-target
->load_error
));
1485 } else if (target
->load_state
== UNIT_MASKED
) {
1486 log_error("Rescue target masked.");
1491 assert(target
->load_state
== UNIT_LOADED
);
1493 if (arg_action
== ACTION_TEST
) {
1494 printf("-> By units:\n");
1495 manager_dump_units(m
, stdout
, "\t");
1498 r
= manager_add_job(m
, JOB_START
, target
, JOB_REPLACE
, false, &error
, &default_unit_job
);
1500 log_error("Failed to start default target: %s", bus_error(&error
, r
));
1501 dbus_error_free(&error
);
1504 m
->default_unit_job_id
= default_unit_job
->id
;
1506 after_startup
= now(CLOCK_MONOTONIC
);
1507 log_full(arg_action
== ACTION_TEST
? LOG_INFO
: LOG_DEBUG
,
1508 "Loaded units and determined initial transaction in %s.",
1509 format_timespan(timespan
, sizeof(timespan
), after_startup
- before_startup
));
1511 if (arg_action
== ACTION_TEST
) {
1512 printf("-> By jobs:\n");
1513 manager_dump_jobs(m
, stdout
, "\t");
1514 retval
= EXIT_SUCCESS
;
1520 r
= manager_loop(m
);
1522 log_error("Failed to run mainloop: %s", strerror(-r
));
1526 switch (m
->exit_code
) {
1529 retval
= EXIT_SUCCESS
;
1533 case MANAGER_RELOAD
:
1534 log_info("Reloading.");
1535 r
= manager_reload(m
);
1537 log_error("Failed to reload: %s", strerror(-r
));
1540 case MANAGER_REEXECUTE
:
1541 if (prepare_reexecute(m
, &serialization
, &fds
) < 0)
1545 log_notice("Reexecuting.");
1548 case MANAGER_REBOOT
:
1549 case MANAGER_POWEROFF
:
1551 case MANAGER_KEXEC
: {
1552 static const char * const table
[_MANAGER_EXIT_CODE_MAX
] = {
1553 [MANAGER_REBOOT
] = "reboot",
1554 [MANAGER_POWEROFF
] = "poweroff",
1555 [MANAGER_HALT
] = "halt",
1556 [MANAGER_KEXEC
] = "kexec"
1559 assert_se(shutdown_verb
= table
[m
->exit_code
]);
1560 arm_reboot_watchdog
= m
->exit_code
== MANAGER_REBOOT
;
1562 log_notice("Shutting down.");
1567 assert_not_reached("Unknown exit code.");
1575 free(arg_default_unit
);
1576 strv_free(arg_default_controllers
);
1577 free_join_controllers();
1584 const char *args
[15];
1588 assert(serialization
);
1591 args
[i
++] = SYSTEMD_BINARY_PATH
;
1593 args
[i
++] = "--log-level";
1594 args
[i
++] = log_level_to_string(log_get_max_level());
1596 args
[i
++] = "--log-target";
1597 args
[i
++] = log_target_to_string(log_get_target());
1599 if (arg_running_as
== MANAGER_SYSTEM
)
1600 args
[i
++] = "--system";
1602 args
[i
++] = "--user";
1605 args
[i
++] = "--dump-core";
1607 if (arg_crash_shell
)
1608 args
[i
++] = "--crash-shell";
1610 if (arg_confirm_spawn
)
1611 args
[i
++] = "--confirm-spawn";
1613 if (arg_show_status
)
1614 args
[i
++] = "--show-status=1";
1616 args
[i
++] = "--show-status=0";
1618 #ifdef HAVE_SYSV_COMPAT
1619 if (arg_sysv_console
)
1620 args
[i
++] = "--sysv-console=1";
1622 args
[i
++] = "--sysv-console=0";
1625 snprintf(sfd
, sizeof(sfd
), "%i", fileno(serialization
));
1628 args
[i
++] = "--deserialize";
1633 assert(i
<= ELEMENTSOF(args
));
1635 /* Close and disarm the watchdog, so that the new
1636 * instance can reinitialize it, but doesn't get
1637 * rebooted while we do that */
1638 watchdog_close(true);
1640 execv(args
[0], (char* const*) args
);
1642 log_error("Failed to reexecute: %m");
1646 fclose(serialization
);
1651 if (shutdown_verb
) {
1652 const char * command_line
[] = {
1653 SYSTEMD_SHUTDOWN_BINARY_PATH
,
1659 if (arm_reboot_watchdog
&& arg_shutdown_watchdog
> 0) {
1662 /* If we reboot let's set the shutdown
1663 * watchdog and tell the shutdown binary to
1664 * repeatedly ping it */
1665 watchdog_set_timeout(&arg_shutdown_watchdog
);
1666 watchdog_close(false);
1668 /* Tell the binary how often to ping */
1669 snprintf(e
, sizeof(e
), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog
);
1672 env_block
= strv_append(environ
, e
);
1674 env_block
= strv_copy(environ
);
1675 watchdog_close(true);
1678 execve(SYSTEMD_SHUTDOWN_BINARY_PATH
, (char **) command_line
, env_block
);
1680 log_error("Failed to execute shutdown binary, freezing: %m");