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 General Public License as published by
10 the Free Software Foundation; either version 2 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 General Public License for more details.
18 You should have received a copy of the GNU 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 "mount-setup.h"
39 #include "hostname-setup.h"
40 #include "loopback-setup.h"
41 #include "kmod-setup.h"
42 #include "locale-setup.h"
43 #include "selinux-setup.h"
44 #include "machine-id-setup.h"
45 #include "load-fragment.h"
48 #include "conf-parser.h"
49 #include "bus-errors.h"
61 ACTION_DUMP_CONFIGURATION_ITEMS
,
63 } arg_action
= ACTION_RUN
;
65 static char *arg_default_unit
= NULL
;
66 static ManagerRunningAs arg_running_as
= _MANAGER_RUNNING_AS_INVALID
;
68 static bool arg_dump_core
= true;
69 static bool arg_crash_shell
= false;
70 static int arg_crash_chvt
= -1;
71 static bool arg_confirm_spawn
= false;
72 static bool arg_show_status
= true;
73 #ifdef HAVE_SYSV_COMPAT
74 static bool arg_sysv_console
= true;
76 static bool arg_mount_auto
= true;
77 static bool arg_swap_auto
= true;
78 static char **arg_default_controllers
= NULL
;
79 static char ***arg_join_controllers
= NULL
;
80 static ExecOutput arg_default_std_output
= EXEC_OUTPUT_JOURNAL
;
81 static ExecOutput arg_default_std_error
= EXEC_OUTPUT_INHERIT
;
83 static FILE* serialization
= NULL
;
85 static void nop_handler(int sig
) {
88 _noreturn_
static void crash(int sig
) {
91 log_error("Caught <%s>, not dumping core.", signal_to_string(sig
));
96 /* We want to wait for the core process, hence let's enable SIGCHLD */
98 sa
.sa_handler
= nop_handler
;
99 sa
.sa_flags
= SA_NOCLDSTOP
|SA_RESTART
;
100 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
102 if ((pid
= fork()) < 0)
103 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig
), strerror(errno
));
108 /* Enable default signal handler for core dump */
110 sa
.sa_handler
= SIG_DFL
;
111 assert_se(sigaction(sig
, &sa
, NULL
) == 0);
113 /* Don't limit the core dump size */
115 rl
.rlim_cur
= RLIM_INFINITY
;
116 rl
.rlim_max
= RLIM_INFINITY
;
117 setrlimit(RLIMIT_CORE
, &rl
);
119 /* Just to be sure... */
120 assert_se(chdir("/") == 0);
122 /* Raise the signal again */
125 assert_not_reached("We shouldn't be here...");
132 /* Order things nicely. */
133 if ((r
= wait_for_terminate(pid
, &status
)) < 0)
134 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig
), strerror(-r
));
135 else if (status
.si_code
!= CLD_DUMPED
)
136 log_error("Caught <%s>, core dump failed.", signal_to_string(sig
));
138 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig
), (unsigned long) pid
);
143 chvt(arg_crash_chvt
);
145 if (arg_crash_shell
) {
149 log_info("Executing crash shell in 10s...");
152 /* Let the kernel reap children for us */
154 sa
.sa_handler
= SIG_IGN
;
155 sa
.sa_flags
= SA_NOCLDSTOP
|SA_NOCLDWAIT
|SA_RESTART
;
156 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
158 if ((pid
= fork()) < 0)
159 log_error("Failed to fork off crash shell: %s", strerror(errno
));
163 if ((fd
= acquire_terminal("/dev/console", false, true, true)) < 0)
164 log_error("Failed to acquire terminal: %s", strerror(-fd
));
165 else if ((r
= make_stdio(fd
)) < 0)
166 log_error("Failed to duplicate terminal fd: %s", strerror(-r
));
168 execl("/bin/sh", "/bin/sh", NULL
);
170 log_error("execl() failed: %s", strerror(errno
));
174 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid
);
177 log_info("Freezing execution.");
181 static void install_crash_handler(void) {
186 sa
.sa_handler
= crash
;
187 sa
.sa_flags
= SA_NODEFER
;
189 sigaction_many(&sa
, SIGNALS_CRASH_HANDLER
, -1);
192 static int console_setup(bool do_reset
) {
195 /* If we are init, we connect stdin/stdout/stderr to /dev/null
196 * and make sure we don't have a controlling tty. */
203 if ((tty_fd
= open_terminal("/dev/console", O_WRONLY
|O_NOCTTY
|O_CLOEXEC
)) < 0) {
204 log_error("Failed to open /dev/console: %s", strerror(-tty_fd
));
208 if ((r
= reset_terminal_fd(tty_fd
)) < 0)
209 log_error("Failed to reset /dev/console: %s", strerror(-r
));
211 close_nointr_nofail(tty_fd
);
215 static int set_default_unit(const char *u
) {
220 if (!(c
= strdup(u
)))
223 free(arg_default_unit
);
224 arg_default_unit
= c
;
228 static int parse_proc_cmdline_word(const char *word
) {
230 static const char * const rlmap
[] = {
231 "emergency", SPECIAL_EMERGENCY_TARGET
,
232 "-b", SPECIAL_EMERGENCY_TARGET
,
233 "single", SPECIAL_RESCUE_TARGET
,
234 "-s", SPECIAL_RESCUE_TARGET
,
235 "s", SPECIAL_RESCUE_TARGET
,
236 "S", SPECIAL_RESCUE_TARGET
,
237 "1", SPECIAL_RESCUE_TARGET
,
238 "2", SPECIAL_RUNLEVEL2_TARGET
,
239 "3", SPECIAL_RUNLEVEL3_TARGET
,
240 "4", SPECIAL_RUNLEVEL4_TARGET
,
241 "5", SPECIAL_RUNLEVEL5_TARGET
,
246 if (startswith(word
, "systemd.unit="))
247 return set_default_unit(word
+ 13);
249 else if (startswith(word
, "systemd.log_target=")) {
251 if (log_set_target_from_string(word
+ 19) < 0)
252 log_warning("Failed to parse log target %s. Ignoring.", word
+ 19);
254 } else if (startswith(word
, "systemd.log_level=")) {
256 if (log_set_max_level_from_string(word
+ 18) < 0)
257 log_warning("Failed to parse log level %s. Ignoring.", word
+ 18);
259 } else if (startswith(word
, "systemd.log_color=")) {
261 if (log_show_color_from_string(word
+ 18) < 0)
262 log_warning("Failed to parse log color setting %s. Ignoring.", word
+ 18);
264 } else if (startswith(word
, "systemd.log_location=")) {
266 if (log_show_location_from_string(word
+ 21) < 0)
267 log_warning("Failed to parse log location setting %s. Ignoring.", word
+ 21);
269 } else if (startswith(word
, "systemd.dump_core=")) {
272 if ((r
= parse_boolean(word
+ 18)) < 0)
273 log_warning("Failed to parse dump core switch %s. Ignoring.", word
+ 18);
277 } else if (startswith(word
, "systemd.crash_shell=")) {
280 if ((r
= parse_boolean(word
+ 20)) < 0)
281 log_warning("Failed to parse crash shell switch %s. Ignoring.", word
+ 20);
285 } else if (startswith(word
, "systemd.confirm_spawn=")) {
288 if ((r
= parse_boolean(word
+ 22)) < 0)
289 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word
+ 22);
291 arg_confirm_spawn
= r
;
293 } else if (startswith(word
, "systemd.crash_chvt=")) {
296 if (safe_atoi(word
+ 19, &k
) < 0)
297 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word
+ 19);
301 } else if (startswith(word
, "systemd.show_status=")) {
304 if ((r
= parse_boolean(word
+ 20)) < 0)
305 log_warning("Failed to parse show status switch %s. Ignoring.", word
+ 20);
308 } else if (startswith(word
, "systemd.default_standard_output=")) {
311 if ((r
= exec_output_from_string(word
+ 32)) < 0)
312 log_warning("Failed to parse default standard output switch %s. Ignoring.", word
+ 32);
314 arg_default_std_output
= r
;
315 } else if (startswith(word
, "systemd.default_standard_error=")) {
318 if ((r
= exec_output_from_string(word
+ 31)) < 0)
319 log_warning("Failed to parse default standard error switch %s. Ignoring.", word
+ 31);
321 arg_default_std_error
= r
;
322 #ifdef HAVE_SYSV_COMPAT
323 } else if (startswith(word
, "systemd.sysv_console=")) {
326 if ((r
= parse_boolean(word
+ 21)) < 0)
327 log_warning("Failed to parse SysV console switch %s. Ignoring.", word
+ 20);
329 arg_sysv_console
= r
;
332 } else if (startswith(word
, "systemd.")) {
334 log_warning("Unknown kernel switch %s. Ignoring.", word
);
336 log_info("Supported kernel switches:\n"
337 "systemd.unit=UNIT Default unit to start\n"
338 "systemd.dump_core=0|1 Dump core on crash\n"
339 "systemd.crash_shell=0|1 Run shell on crash\n"
340 "systemd.crash_chvt=N Change to VT #N on crash\n"
341 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
342 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
343 #ifdef HAVE_SYSV_COMPAT
344 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
346 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
348 "systemd.log_level=LEVEL Log level\n"
349 "systemd.log_color=0|1 Highlight important log messages\n"
350 "systemd.log_location=0|1 Include code location in log messages\n"
351 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
352 " Set default log output for services\n"
353 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
354 " Set default log error output for services\n");
356 } else if (streq(word
, "quiet")) {
357 arg_show_status
= false;
358 #ifdef HAVE_SYSV_COMPAT
359 arg_sysv_console
= false;
364 /* SysV compatibility */
365 for (i
= 0; i
< ELEMENTSOF(rlmap
); i
+= 2)
366 if (streq(word
, rlmap
[i
]))
367 return set_default_unit(rlmap
[i
+1]);
373 static int config_parse_level2(
374 const char *filename
,
387 log_set_max_level_from_string(rvalue
);
391 static int config_parse_target(
392 const char *filename
,
405 log_set_target_from_string(rvalue
);
409 static int config_parse_color(
410 const char *filename
,
423 log_show_color_from_string(rvalue
);
427 static int config_parse_location(
428 const char *filename
,
441 log_show_location_from_string(rvalue
);
445 static int config_parse_cpu_affinity2(
446 const char *filename
,
465 FOREACH_WORD_QUOTED(w
, l
, rvalue
, state
) {
470 if (!(t
= strndup(w
, l
)))
473 r
= safe_atou(t
, &cpu
);
477 if (!(c
= cpu_set_malloc(&ncpus
)))
480 if (r
< 0 || cpu
>= ncpus
) {
481 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename
, line
, rvalue
);
486 CPU_SET_S(cpu
, CPU_ALLOC_SIZE(ncpus
), c
);
490 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus
), c
) < 0)
491 log_warning("Failed to set CPU affinity: %m");
499 static void strv_free_free(char ***l
) {
511 static void free_join_controllers(void) {
512 if (!arg_join_controllers
)
515 strv_free_free(arg_join_controllers
);
516 arg_join_controllers
= NULL
;
519 static int config_parse_join_controllers(
520 const char *filename
,
537 free_join_controllers();
539 FOREACH_WORD_QUOTED(w
, length
, rvalue
, state
) {
542 s
= strndup(w
, length
);
546 l
= strv_split(s
, ",");
551 if (strv_length(l
) <= 1) {
556 if (!arg_join_controllers
) {
557 arg_join_controllers
= new(char**, 2);
558 if (!arg_join_controllers
) {
563 arg_join_controllers
[0] = l
;
564 arg_join_controllers
[1] = NULL
;
571 t
= new0(char**, n
+2);
579 for (a
= arg_join_controllers
; *a
; a
++) {
581 if (strv_overlap(*a
, l
)) {
584 c
= strv_merge(*a
, l
);
607 t
[n
++] = strv_uniq(l
);
609 strv_free_free(arg_join_controllers
);
610 arg_join_controllers
= t
;
617 static int parse_config_file(void) {
619 const ConfigTableItem items
[] = {
620 { "Manager", "LogLevel", config_parse_level2
, 0, NULL
},
621 { "Manager", "LogTarget", config_parse_target
, 0, NULL
},
622 { "Manager", "LogColor", config_parse_color
, 0, NULL
},
623 { "Manager", "LogLocation", config_parse_location
, 0, NULL
},
624 { "Manager", "DumpCore", config_parse_bool
, 0, &arg_dump_core
},
625 { "Manager", "CrashShell", config_parse_bool
, 0, &arg_crash_shell
},
626 { "Manager", "ShowStatus", config_parse_bool
, 0, &arg_show_status
},
627 #ifdef HAVE_SYSV_COMPAT
628 { "Manager", "SysVConsole", config_parse_bool
, 0, &arg_sysv_console
},
630 { "Manager", "CrashChVT", config_parse_int
, 0, &arg_crash_chvt
},
631 { "Manager", "CPUAffinity", config_parse_cpu_affinity2
, 0, NULL
},
632 { "Manager", "MountAuto", config_parse_bool
, 0, &arg_mount_auto
},
633 { "Manager", "SwapAuto", config_parse_bool
, 0, &arg_swap_auto
},
634 { "Manager", "DefaultControllers", config_parse_strv
, 0, &arg_default_controllers
},
635 { "Manager", "DefaultStandardOutput", config_parse_output
, 0, &arg_default_std_output
},
636 { "Manager", "DefaultStandardError", config_parse_output
, 0, &arg_default_std_error
},
637 { "Manager", "JoinControllers", config_parse_join_controllers
, 0, &arg_join_controllers
},
638 { NULL
, NULL
, NULL
, 0, NULL
}
645 fn
= arg_running_as
== MANAGER_SYSTEM
? SYSTEM_CONFIG_FILE
: USER_CONFIG_FILE
;
651 log_warning("Failed to open configuration file '%s': %m", fn
);
655 r
= config_parse(fn
, f
, "Manager\0", config_item_table_lookup
, (void*) items
, false, NULL
);
657 log_warning("Failed to parse configuration file: %s", strerror(-r
));
664 static int parse_proc_cmdline(void) {
665 char *line
, *w
, *state
;
669 /* Don't read /proc/cmdline if we are in a container, since
670 * that is only relevant for the host system */
671 if (detect_container(NULL
) > 0)
674 if ((r
= read_one_line_file("/proc/cmdline", &line
)) < 0) {
675 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r
));
679 FOREACH_WORD_QUOTED(w
, l
, line
, state
) {
682 if (!(word
= strndup(w
, l
))) {
687 r
= parse_proc_cmdline_word(word
);
701 static int parse_argv(int argc
, char *argv
[]) {
704 ARG_LOG_LEVEL
= 0x100,
712 ARG_DUMP_CONFIGURATION_ITEMS
,
720 ARG_DEFAULT_STD_OUTPUT
,
721 ARG_DEFAULT_STD_ERROR
724 static const struct option options
[] = {
725 { "log-level", required_argument
, NULL
, ARG_LOG_LEVEL
},
726 { "log-target", required_argument
, NULL
, ARG_LOG_TARGET
},
727 { "log-color", optional_argument
, NULL
, ARG_LOG_COLOR
},
728 { "log-location", optional_argument
, NULL
, ARG_LOG_LOCATION
},
729 { "unit", required_argument
, NULL
, ARG_UNIT
},
730 { "system", no_argument
, NULL
, ARG_SYSTEM
},
731 { "user", no_argument
, NULL
, ARG_USER
},
732 { "test", no_argument
, NULL
, ARG_TEST
},
733 { "help", no_argument
, NULL
, 'h' },
734 { "dump-configuration-items", no_argument
, NULL
, ARG_DUMP_CONFIGURATION_ITEMS
},
735 { "dump-core", no_argument
, NULL
, ARG_DUMP_CORE
},
736 { "crash-shell", no_argument
, NULL
, ARG_CRASH_SHELL
},
737 { "confirm-spawn", no_argument
, NULL
, ARG_CONFIRM_SPAWN
},
738 { "show-status", optional_argument
, NULL
, ARG_SHOW_STATUS
},
739 #ifdef HAVE_SYSV_COMPAT
740 { "sysv-console", optional_argument
, NULL
, ARG_SYSV_CONSOLE
},
742 { "deserialize", required_argument
, NULL
, ARG_DESERIALIZE
},
743 { "introspect", optional_argument
, NULL
, ARG_INTROSPECT
},
744 { "default-standard-output", required_argument
, NULL
, ARG_DEFAULT_STD_OUTPUT
, },
745 { "default-standard-error", required_argument
, NULL
, ARG_DEFAULT_STD_ERROR
, },
757 while ((c
= getopt_long(argc
, argv
, "hDbsz:", options
, NULL
)) >= 0)
762 if ((r
= log_set_max_level_from_string(optarg
)) < 0) {
763 log_error("Failed to parse log level %s.", optarg
);
771 if ((r
= log_set_target_from_string(optarg
)) < 0) {
772 log_error("Failed to parse log target %s.", optarg
);
781 if ((r
= log_show_color_from_string(optarg
)) < 0) {
782 log_error("Failed to parse log color setting %s.", optarg
);
786 log_show_color(true);
790 case ARG_LOG_LOCATION
:
793 if ((r
= log_show_location_from_string(optarg
)) < 0) {
794 log_error("Failed to parse log location setting %s.", optarg
);
798 log_show_location(true);
802 case ARG_DEFAULT_STD_OUTPUT
:
804 if ((r
= exec_output_from_string(optarg
)) < 0) {
805 log_error("Failed to parse default standard output setting %s.", optarg
);
808 arg_default_std_output
= r
;
811 case ARG_DEFAULT_STD_ERROR
:
813 if ((r
= exec_output_from_string(optarg
)) < 0) {
814 log_error("Failed to parse default standard error output setting %s.", optarg
);
817 arg_default_std_error
= r
;
822 if ((r
= set_default_unit(optarg
)) < 0) {
823 log_error("Failed to set default unit %s: %s", optarg
, strerror(-r
));
830 arg_running_as
= MANAGER_SYSTEM
;
834 arg_running_as
= MANAGER_USER
;
838 arg_action
= ACTION_TEST
;
841 case ARG_DUMP_CONFIGURATION_ITEMS
:
842 arg_action
= ACTION_DUMP_CONFIGURATION_ITEMS
;
846 arg_dump_core
= true;
849 case ARG_CRASH_SHELL
:
850 arg_crash_shell
= true;
853 case ARG_CONFIRM_SPAWN
:
854 arg_confirm_spawn
= true;
857 case ARG_SHOW_STATUS
:
860 if ((r
= parse_boolean(optarg
)) < 0) {
861 log_error("Failed to show status boolean %s.", optarg
);
866 arg_show_status
= true;
868 #ifdef HAVE_SYSV_COMPAT
869 case ARG_SYSV_CONSOLE
:
872 if ((r
= parse_boolean(optarg
)) < 0) {
873 log_error("Failed to SysV console boolean %s.", optarg
);
876 arg_sysv_console
= r
;
878 arg_sysv_console
= true;
882 case ARG_DESERIALIZE
: {
886 if ((r
= safe_atoi(optarg
, &fd
)) < 0 || fd
< 0) {
887 log_error("Failed to parse deserialize option %s.", optarg
);
891 if (!(f
= fdopen(fd
, "r"))) {
892 log_error("Failed to open serialization fd: %m");
897 fclose(serialization
);
904 case ARG_INTROSPECT
: {
905 const char * const * i
= NULL
;
907 for (i
= bus_interface_table
; *i
; i
+= 2)
908 if (!optarg
|| streq(i
[0], optarg
)) {
909 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
912 fputs("</node>\n", stdout
);
919 log_error("Unknown interface %s.", optarg
);
921 arg_action
= ACTION_DONE
;
926 arg_action
= ACTION_HELP
;
930 log_set_max_level(LOG_DEBUG
);
936 /* Just to eat away the sysvinit kernel
937 * cmdline args without getopt() error
938 * messages that we'll parse in
939 * parse_proc_cmdline_word() or ignore. */
944 log_error("Unknown option code %c", c
);
951 if (optind
< argc
&& getpid() != 1) {
952 /* Hmm, when we aren't run as init system
953 * let's complain about excess arguments */
955 log_error("Excess arguments.");
959 if (detect_container(NULL
) > 0) {
962 /* All /proc/cmdline arguments the kernel didn't
963 * understand it passed to us. We're not really
964 * interested in that usually since /proc/cmdline is
965 * more interesting and complete. With one exception:
966 * if we are run in a container /proc/cmdline is not
967 * relevant for the container, hence we rely on argv[]
970 for (a
= argv
; a
< argv
+ argc
; a
++)
971 if ((r
= parse_proc_cmdline_word(*a
)) < 0)
978 static int help(void) {
980 printf("%s [OPTIONS...]\n\n"
981 "Starts up and maintains the system or user services.\n\n"
982 " -h --help Show this help\n"
983 " --test Determine startup sequence, dump it and exit\n"
984 " --dump-configuration-items Dump understood unit configuration items\n"
985 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
986 " --unit=UNIT Set default unit\n"
987 " --system Run a system instance, even if PID != 1\n"
988 " --user Run a user instance\n"
989 " --dump-core Dump core on crash\n"
990 " --crash-shell Run shell on crash\n"
991 " --confirm-spawn Ask for confirmation when spawning processes\n"
992 " --show-status[=0|1] Show status updates on the console during bootup\n"
993 #ifdef HAVE_SYSV_COMPAT
994 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
996 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
997 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
998 " --log-color[=0|1] Highlight important log messages\n"
999 " --log-location[=0|1] Include code location in log messages\n"
1000 " --default-standard-output= Set default standard output for services\n"
1001 " --default-standard-error= Set default standard error output for services\n",
1002 program_invocation_short_name
);
1007 static int prepare_reexecute(Manager
*m
, FILE **_f
, FDSet
**_fds
) {
1016 /* Make sure nothing is really destructed when we shut down */
1019 if ((r
= manager_open_serialization(m
, &f
)) < 0) {
1020 log_error("Failed to create serialization file: %s", strerror(-r
));
1024 if (!(fds
= fdset_new())) {
1026 log_error("Failed to allocate fd set: %s", strerror(-r
));
1030 if ((r
= manager_serialize(m
, f
, fds
)) < 0) {
1031 log_error("Failed to serialize state: %s", strerror(-r
));
1035 if (fseeko(f
, 0, SEEK_SET
) < 0) {
1036 log_error("Failed to rewind serialization fd: %m");
1040 if ((r
= fd_cloexec(fileno(f
), false)) < 0) {
1041 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r
));
1045 if ((r
= fdset_cloexec(fds
, false)) < 0) {
1046 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r
));
1064 static struct dual_timestamp
* parse_initrd_timestamp(struct dual_timestamp
*t
) {
1066 unsigned long long a
, b
;
1070 if (!(e
= getenv("RD_TIMESTAMP")))
1073 if (sscanf(e
, "%llu %llu", &a
, &b
) != 2)
1076 t
->realtime
= (usec_t
) a
;
1077 t
->monotonic
= (usec_t
) b
;
1082 static void test_mtab(void) {
1085 /* Check that /etc/mtab is a symlink */
1087 if (readlink_malloc("/etc/mtab", &p
) >= 0) {
1090 b
= streq(p
, "/proc/self/mounts") || streq(p
, "/proc/mounts");
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 filesytem 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 void test_cgroups(void) {
1116 if (access("/proc/cgroups", F_OK
) >= 0)
1119 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1120 "Systems without control groups are not supported. "
1121 "We will now sleep for 10s, and then continue boot-up. "
1122 "Expect breakage and please do not file bugs. "
1123 "Instead fix your kernel and enable CONFIG_CGROUPS." );
1128 int main(int argc
, char *argv
[]) {
1130 int r
, retval
= EXIT_FAILURE
;
1131 usec_t before_startup
, after_startup
;
1132 char timespan
[FORMAT_TIMESPAN_MAX
];
1134 bool reexecute
= false;
1135 const char *shutdown_verb
= NULL
;
1136 dual_timestamp initrd_timestamp
= { 0ULL, 0ULL };
1137 char systemd
[] = "systemd";
1138 bool is_reexec
= false;
1140 bool loaded_policy
= false;
1142 #ifdef HAVE_SYSV_COMPAT
1143 if (getpid() != 1 && strstr(program_invocation_short_name
, "init")) {
1144 /* This is compatibility support for SysV, where
1145 * calling init as a user is identical to telinit. */
1148 execv(SYSTEMCTL_BINARY_PATH
, argv
);
1149 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH
": %m");
1154 /* Determine if this is a reexecution or normal bootup. We do
1155 * the full command line parsing much later, so let's just
1156 * have a quick peek here. */
1158 for (j
= 1; j
< argc
; j
++)
1159 if (streq(argv
[j
], "--deserialize")) {
1164 /* If we get started via the /sbin/init symlink then we are
1165 called 'init'. After a subsequent reexecution we are then
1166 called 'systemd'. That is confusing, hence let's call us
1167 systemd right-away. */
1169 program_invocation_short_name
= systemd
;
1170 prctl(PR_SET_NAME
, systemd
);
1174 log_show_color(isatty(STDERR_FILENO
) > 0);
1175 log_show_location(false);
1176 log_set_max_level(LOG_INFO
);
1178 if (getpid() == 1) {
1179 arg_running_as
= MANAGER_SYSTEM
;
1180 log_set_target(detect_container(NULL
) > 0 ? LOG_TARGET_CONSOLE
: LOG_TARGET_JOURNAL_OR_KMSG
);
1183 if (selinux_setup(&loaded_policy
) < 0)
1188 if (label_init() < 0)
1192 if (hwclock_is_localtime() > 0) {
1195 r
= hwclock_apply_localtime_delta(&min
);
1197 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r
));
1199 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min
);
1203 arg_running_as
= MANAGER_USER
;
1204 log_set_target(LOG_TARGET_AUTO
);
1208 /* Initialize default unit */
1209 if (set_default_unit(SPECIAL_DEFAULT_TARGET
) < 0)
1212 /* By default, mount "cpu" and "cpuacct" together */
1213 arg_join_controllers
= new(char**, 2);
1214 if (!arg_join_controllers
)
1217 arg_join_controllers
[0] = strv_new("cpu", "cpuacct", NULL
);
1218 arg_join_controllers
[1] = NULL
;
1220 if (!arg_join_controllers
[0])
1223 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1224 * /proc/$PID/fd is available. */
1225 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1226 r
= mount_setup(loaded_policy
);
1231 /* Reset all signal handlers. */
1232 assert_se(reset_all_signal_handlers() == 0);
1234 /* If we are init, we can block sigkill. Yay. */
1235 ignore_signals(SIGNALS_IGNORE
, -1);
1237 if (parse_config_file() < 0)
1240 if (arg_running_as
== MANAGER_SYSTEM
)
1241 if (parse_proc_cmdline() < 0)
1244 log_parse_environment();
1246 if (parse_argv(argc
, argv
) < 0)
1249 if (arg_action
== ACTION_TEST
&& geteuid() == 0) {
1250 log_error("Don't run test mode as root.");
1254 if (arg_running_as
== MANAGER_SYSTEM
&&
1255 arg_action
== ACTION_RUN
&&
1256 running_in_chroot() > 0) {
1257 log_error("Cannot be run in a chroot() environment.");
1261 if (arg_action
== ACTION_HELP
) {
1264 } else if (arg_action
== ACTION_DUMP_CONFIGURATION_ITEMS
) {
1265 unit_dump_config_items(stdout
);
1266 retval
= EXIT_SUCCESS
;
1268 } else if (arg_action
== ACTION_DONE
) {
1269 retval
= EXIT_SUCCESS
;
1273 assert_se(arg_action
== ACTION_RUN
|| arg_action
== ACTION_TEST
);
1275 /* Close logging fds, in order not to confuse fdset below */
1278 /* Remember open file descriptors for later deserialization */
1279 if (serialization
) {
1280 if ((r
= fdset_new_fill(&fds
)) < 0) {
1281 log_error("Failed to allocate fd set: %s", strerror(-r
));
1285 assert_se(fdset_remove(fds
, fileno(serialization
)) >= 0);
1287 close_all_fds(NULL
, 0);
1289 /* Set up PATH unless it is already set */
1291 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1292 arg_running_as
== MANAGER_SYSTEM
);
1294 if (arg_running_as
== MANAGER_SYSTEM
) {
1295 /* Parse the data passed to us by the initrd and unset it */
1296 parse_initrd_timestamp(&initrd_timestamp
);
1297 filter_environ("RD_");
1299 /* Unset some environment variables passed in from the
1300 * kernel that don't really make sense for us. */
1304 /* All other variables are left as is, so that clients
1305 * can still read them via /proc/1/environ */
1308 /* Move out of the way, so that we won't block unmounts */
1309 assert_se(chdir("/") == 0);
1311 if (arg_running_as
== MANAGER_SYSTEM
) {
1312 /* Become a session leader if we aren't one yet. */
1315 /* Disable the umask logic */
1319 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1320 dbus_connection_set_change_sigpipe(FALSE
);
1322 /* Reset the console, but only if this is really init and we
1323 * are freshly booted */
1324 if (arg_running_as
== MANAGER_SYSTEM
&& arg_action
== ACTION_RUN
) {
1325 console_setup(getpid() == 1 && !is_reexec
);
1329 /* Open the logging devices, if possible and necessary */
1332 /* Make sure we leave a core dump without panicing the
1335 install_crash_handler();
1337 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1338 r
= mount_cgroup_controllers(arg_join_controllers
);
1343 log_full(arg_running_as
== MANAGER_SYSTEM
? LOG_INFO
: LOG_DEBUG
,
1344 PACKAGE_STRING
" running in %s mode. (" SYSTEMD_FEATURES
"; " DISTRIBUTION
")", manager_running_as_to_string(arg_running_as
));
1346 if (arg_running_as
== MANAGER_SYSTEM
&& !is_reexec
) {
1349 if (arg_show_status
|| plymouth_running())
1362 if ((r
= manager_new(arg_running_as
, &m
)) < 0) {
1363 log_error("Failed to allocate manager object: %s", strerror(-r
));
1367 m
->confirm_spawn
= arg_confirm_spawn
;
1368 #ifdef HAVE_SYSV_COMPAT
1369 m
->sysv_console
= arg_sysv_console
;
1371 m
->mount_auto
= arg_mount_auto
;
1372 m
->swap_auto
= arg_swap_auto
;
1373 m
->default_std_output
= arg_default_std_output
;
1374 m
->default_std_error
= arg_default_std_error
;
1376 if (dual_timestamp_is_set(&initrd_timestamp
))
1377 m
->initrd_timestamp
= initrd_timestamp
;
1379 if (arg_default_controllers
)
1380 manager_set_default_controllers(m
, arg_default_controllers
);
1382 manager_set_show_status(m
, arg_show_status
);
1384 before_startup
= now(CLOCK_MONOTONIC
);
1386 if ((r
= manager_startup(m
, serialization
, fds
)) < 0)
1387 log_error("Failed to fully start up daemon: %s", strerror(-r
));
1390 /* This will close all file descriptors that were opened, but
1391 * not claimed by any unit. */
1397 if (serialization
) {
1398 fclose(serialization
);
1399 serialization
= NULL
;
1402 Unit
*target
= NULL
;
1404 dbus_error_init(&error
);
1406 log_debug("Activating default unit: %s", arg_default_unit
);
1408 if ((r
= manager_load_unit(m
, arg_default_unit
, NULL
, &error
, &target
)) < 0) {
1409 log_error("Failed to load default target: %s", bus_error(&error
, r
));
1410 dbus_error_free(&error
);
1411 } else if (target
->meta
.load_state
== UNIT_ERROR
)
1412 log_error("Failed to load default target: %s", strerror(-target
->meta
.load_error
));
1413 else if (target
->meta
.load_state
== UNIT_MASKED
)
1414 log_error("Default target masked.");
1416 if (!target
|| target
->meta
.load_state
!= UNIT_LOADED
) {
1417 log_info("Trying to load rescue target...");
1419 if ((r
= manager_load_unit(m
, SPECIAL_RESCUE_TARGET
, NULL
, &error
, &target
)) < 0) {
1420 log_error("Failed to load rescue target: %s", bus_error(&error
, r
));
1421 dbus_error_free(&error
);
1423 } else if (target
->meta
.load_state
== UNIT_ERROR
) {
1424 log_error("Failed to load rescue target: %s", strerror(-target
->meta
.load_error
));
1426 } else if (target
->meta
.load_state
== UNIT_MASKED
) {
1427 log_error("Rescue target masked.");
1432 assert(target
->meta
.load_state
== UNIT_LOADED
);
1434 if (arg_action
== ACTION_TEST
) {
1435 printf("-> By units:\n");
1436 manager_dump_units(m
, stdout
, "\t");
1439 if ((r
= manager_add_job(m
, JOB_START
, target
, JOB_REPLACE
, false, &error
, NULL
)) < 0) {
1440 log_error("Failed to start default target: %s", bus_error(&error
, r
));
1441 dbus_error_free(&error
);
1445 after_startup
= now(CLOCK_MONOTONIC
);
1446 log_full(arg_action
== ACTION_TEST
? LOG_INFO
: LOG_DEBUG
,
1447 "Loaded units and determined initial transaction in %s.",
1448 format_timespan(timespan
, sizeof(timespan
), after_startup
- before_startup
));
1450 if (arg_action
== ACTION_TEST
) {
1451 printf("-> By jobs:\n");
1452 manager_dump_jobs(m
, stdout
, "\t");
1453 retval
= EXIT_SUCCESS
;
1459 if ((r
= manager_loop(m
)) < 0) {
1460 log_error("Failed to run mainloop: %s", strerror(-r
));
1464 switch (m
->exit_code
) {
1467 retval
= EXIT_SUCCESS
;
1471 case MANAGER_RELOAD
:
1472 log_info("Reloading.");
1473 if ((r
= manager_reload(m
)) < 0)
1474 log_error("Failed to reload: %s", strerror(-r
));
1477 case MANAGER_REEXECUTE
:
1478 if (prepare_reexecute(m
, &serialization
, &fds
) < 0)
1482 log_notice("Reexecuting.");
1485 case MANAGER_REBOOT
:
1486 case MANAGER_POWEROFF
:
1488 case MANAGER_KEXEC
: {
1489 static const char * const table
[_MANAGER_EXIT_CODE_MAX
] = {
1490 [MANAGER_REBOOT
] = "reboot",
1491 [MANAGER_POWEROFF
] = "poweroff",
1492 [MANAGER_HALT
] = "halt",
1493 [MANAGER_KEXEC
] = "kexec"
1496 assert_se(shutdown_verb
= table
[m
->exit_code
]);
1498 log_notice("Shutting down.");
1503 assert_not_reached("Unknown exit code.");
1511 free(arg_default_unit
);
1512 strv_free(arg_default_controllers
);
1513 free_join_controllers();
1520 const char *args
[15];
1524 assert(serialization
);
1527 args
[i
++] = SYSTEMD_BINARY_PATH
;
1529 args
[i
++] = "--log-level";
1530 args
[i
++] = log_level_to_string(log_get_max_level());
1532 args
[i
++] = "--log-target";
1533 args
[i
++] = log_target_to_string(log_get_target());
1535 if (arg_running_as
== MANAGER_SYSTEM
)
1536 args
[i
++] = "--system";
1538 args
[i
++] = "--user";
1541 args
[i
++] = "--dump-core";
1543 if (arg_crash_shell
)
1544 args
[i
++] = "--crash-shell";
1546 if (arg_confirm_spawn
)
1547 args
[i
++] = "--confirm-spawn";
1549 if (arg_show_status
)
1550 args
[i
++] = "--show-status=1";
1552 args
[i
++] = "--show-status=0";
1554 #ifdef HAVE_SYSV_COMPAT
1555 if (arg_sysv_console
)
1556 args
[i
++] = "--sysv-console=1";
1558 args
[i
++] = "--sysv-console=0";
1561 snprintf(sfd
, sizeof(sfd
), "%i", fileno(serialization
));
1564 args
[i
++] = "--deserialize";
1569 assert(i
<= ELEMENTSOF(args
));
1571 execv(args
[0], (char* const*) args
);
1573 log_error("Failed to reexecute: %m");
1577 fclose(serialization
);
1582 if (shutdown_verb
) {
1583 const char * command_line
[] = {
1584 SYSTEMD_SHUTDOWN_BINARY_PATH
,
1589 execv(SYSTEMD_SHUTDOWN_BINARY_PATH
, (char **) command_line
);
1590 log_error("Failed to execute shutdown binary, freezing: %m");