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main: minor code modernization for initializing the console
[thirdparty/systemd.git] / src / core / main.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
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.
12
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.
17
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/>.
20 ***/
21
22 #include <stdio.h>
23 #include <errno.h>
24 #include <string.h>
25 #include <unistd.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <getopt.h>
29 #include <signal.h>
30 #include <sys/wait.h>
31 #include <fcntl.h>
32 #include <sys/prctl.h>
33 #include <sys/mount.h>
34
35 #ifdef HAVE_VALGRIND_VALGRIND_H
36 #include <valgrind/valgrind.h>
37 #endif
38 #ifdef HAVE_SECCOMP
39 #include <seccomp.h>
40 #endif
41
42 #include "sd-daemon.h"
43 #include "sd-messages.h"
44 #include "sd-bus.h"
45 #include "manager.h"
46 #include "log.h"
47 #include "load-fragment.h"
48 #include "fdset.h"
49 #include "special.h"
50 #include "conf-parser.h"
51 #include "missing.h"
52 #include "label.h"
53 #include "pager.h"
54 #include "build.h"
55 #include "strv.h"
56 #include "def.h"
57 #include "virt.h"
58 #include "architecture.h"
59 #include "watchdog.h"
60 #include "path-util.h"
61 #include "switch-root.h"
62 #include "capability.h"
63 #include "killall.h"
64 #include "env-util.h"
65 #include "clock-util.h"
66 #include "fileio.h"
67 #include "dbus-manager.h"
68 #include "bus-error.h"
69 #include "bus-util.h"
70
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 #ifdef HAVE_KMOD
79 #include "kmod-setup.h"
80 #endif
81
82 static enum {
83 ACTION_RUN,
84 ACTION_HELP,
85 ACTION_VERSION,
86 ACTION_TEST,
87 ACTION_DUMP_CONFIGURATION_ITEMS,
88 ACTION_DONE
89 } arg_action = ACTION_RUN;
90 static char *arg_default_unit = NULL;
91 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
92 static bool arg_dump_core = true;
93 static bool arg_crash_shell = false;
94 static int arg_crash_chvt = -1;
95 static bool arg_confirm_spawn = false;
96 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
97 static bool arg_switched_root = false;
98 static int arg_no_pager = -1;
99 static char ***arg_join_controllers = NULL;
100 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
101 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
102 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
103 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
104 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
105 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
106 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
107 static usec_t arg_runtime_watchdog = 0;
108 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
109 static char **arg_default_environment = NULL;
110 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
111 static uint64_t arg_capability_bounding_set_drop = 0;
112 static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
113 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
114 static Set* arg_syscall_archs = NULL;
115 static FILE* arg_serialization = NULL;
116 static bool arg_default_cpu_accounting = false;
117 static bool arg_default_blockio_accounting = false;
118 static bool arg_default_memory_accounting = false;
119
120 static void nop_handler(int sig) {}
121
122 static void pager_open_if_enabled(void) {
123
124 if (arg_no_pager <= 0)
125 return;
126
127 pager_open(false);
128 }
129
130 noreturn static void crash(int sig) {
131
132 if (getpid() != 1)
133 /* Pass this on immediately, if this is not PID 1 */
134 raise(sig);
135 else if (!arg_dump_core)
136 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
137 else {
138 struct sigaction sa = {
139 .sa_handler = nop_handler,
140 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
141 };
142 pid_t pid;
143
144 /* We want to wait for the core process, hence let's enable SIGCHLD */
145 sigaction(SIGCHLD, &sa, NULL);
146
147 pid = fork();
148 if (pid < 0)
149 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
150
151 else if (pid == 0) {
152 struct rlimit rl = {};
153
154 /* Enable default signal handler for core dump */
155 zero(sa);
156 sa.sa_handler = SIG_DFL;
157 sigaction(sig, &sa, NULL);
158
159 /* Don't limit the core dump size */
160 rl.rlim_cur = RLIM_INFINITY;
161 rl.rlim_max = RLIM_INFINITY;
162 setrlimit(RLIMIT_CORE, &rl);
163
164 /* Just to be sure... */
165 chdir("/");
166
167 /* Raise the signal again */
168 raise(sig);
169
170 assert_not_reached("We shouldn't be here...");
171 _exit(1);
172
173 } else {
174 siginfo_t status;
175 int r;
176
177 /* Order things nicely. */
178 r = wait_for_terminate(pid, &status);
179 if (r < 0)
180 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
181 else if (status.si_code != CLD_DUMPED)
182 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
183 else
184 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
185 }
186 }
187
188 if (arg_crash_chvt)
189 chvt(arg_crash_chvt);
190
191 if (arg_crash_shell) {
192 struct sigaction sa = {
193 .sa_handler = SIG_IGN,
194 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
195 };
196 pid_t pid;
197
198 log_info("Executing crash shell in 10s...");
199 sleep(10);
200
201 /* Let the kernel reap children for us */
202 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
203
204 pid = fork();
205 if (pid < 0)
206 log_error("Failed to fork off crash shell: %m");
207 else if (pid == 0) {
208 make_console_stdio();
209 execl("/bin/sh", "/bin/sh", NULL);
210
211 log_error("execl() failed: %m");
212 _exit(1);
213 }
214
215 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
216 }
217
218 log_info("Freezing execution.");
219 freeze();
220 }
221
222 static void install_crash_handler(void) {
223 struct sigaction sa = {
224 .sa_handler = crash,
225 .sa_flags = SA_NODEFER,
226 };
227
228 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
229 }
230
231 static int console_setup(void) {
232 _cleanup_close_ int tty_fd = -1;
233 int r;
234
235 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
236 if (tty_fd < 0) {
237 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
238 return tty_fd;
239 }
240
241 /* We don't want to force text mode. plymouth may be showing
242 * pictures already from initrd. */
243 r = reset_terminal_fd(tty_fd, false);
244 if (r < 0) {
245 log_error("Failed to reset /dev/console: %s", strerror(-r));
246 return r;
247 }
248
249 return 0;
250 }
251
252 static int set_default_unit(const char *u) {
253 char *c;
254
255 assert(u);
256
257 c = strdup(u);
258 if (!c)
259 return -ENOMEM;
260
261 free(arg_default_unit);
262 arg_default_unit = c;
263
264 return 0;
265 }
266
267 static int parse_proc_cmdline_item(const char *key, const char *value) {
268
269 static const char * const rlmap[] = {
270 "emergency", SPECIAL_EMERGENCY_TARGET,
271 "-b", SPECIAL_EMERGENCY_TARGET,
272 "single", SPECIAL_RESCUE_TARGET,
273 "-s", SPECIAL_RESCUE_TARGET,
274 "s", SPECIAL_RESCUE_TARGET,
275 "S", SPECIAL_RESCUE_TARGET,
276 "1", SPECIAL_RESCUE_TARGET,
277 "2", SPECIAL_RUNLEVEL2_TARGET,
278 "3", SPECIAL_RUNLEVEL3_TARGET,
279 "4", SPECIAL_RUNLEVEL4_TARGET,
280 "5", SPECIAL_RUNLEVEL5_TARGET,
281 };
282 int r;
283
284 assert(key);
285
286 if (streq(key, "systemd.unit") && value) {
287
288 if (!in_initrd())
289 return set_default_unit(value);
290
291 } else if (streq(key, "rd.systemd.unit") && value) {
292
293 if (in_initrd())
294 return set_default_unit(value);
295
296 } else if (streq(key, "systemd.log_target") && value) {
297
298 if (log_set_target_from_string(value) < 0)
299 log_warning("Failed to parse log target %s. Ignoring.", value);
300
301 } else if (streq(key, "systemd.log_level") && value) {
302
303 if (log_set_max_level_from_string(value) < 0)
304 log_warning("Failed to parse log level %s. Ignoring.", value);
305
306 } else if (streq(key, "systemd.log_color") && value) {
307
308 if (log_show_color_from_string(value) < 0)
309 log_warning("Failed to parse log color setting %s. Ignoring.", value);
310
311 } else if (streq(key, "systemd.log_location") && value) {
312
313 if (log_show_location_from_string(value) < 0)
314 log_warning("Failed to parse log location setting %s. Ignoring.", value);
315
316 } else if (streq(key, "systemd.dump_core") && value) {
317
318 r = parse_boolean(value);
319 if (r < 0)
320 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
321 else
322 arg_dump_core = r;
323
324 } else if (streq(key, "systemd.crash_shell") && value) {
325
326 r = parse_boolean(value);
327 if (r < 0)
328 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
329 else
330 arg_crash_shell = r;
331
332 } else if (streq(key, "systemd.crash_chvt") && value) {
333
334 if (safe_atoi(value, &r) < 0)
335 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
336 else
337 arg_crash_chvt = r;
338
339 } else if (streq(key, "systemd.confirm_spawn") && value) {
340
341 r = parse_boolean(value);
342 if (r < 0)
343 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
344 else
345 arg_confirm_spawn = r;
346
347 } else if (streq(key, "systemd.show_status") && value) {
348
349 r = parse_show_status(value, &arg_show_status);
350 if (r < 0)
351 log_warning("Failed to parse show status switch %s. Ignoring.", value);
352
353 } else if (streq(key, "systemd.default_standard_output") && value) {
354
355 r = exec_output_from_string(value);
356 if (r < 0)
357 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
358 else
359 arg_default_std_output = r;
360
361 } else if (streq(key, "systemd.default_standard_error") && value) {
362
363 r = exec_output_from_string(value);
364 if (r < 0)
365 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
366 else
367 arg_default_std_error = r;
368
369 } else if (streq(key, "systemd.setenv") && value) {
370
371 if (env_assignment_is_valid(value)) {
372 char **env;
373
374 env = strv_env_set(arg_default_environment, value);
375 if (env)
376 arg_default_environment = env;
377 else
378 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
379 } else
380 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
381
382 } else if (streq(key, "quiet") && !value) {
383
384 log_set_max_level(LOG_NOTICE);
385
386 if (arg_show_status == _SHOW_STATUS_UNSET)
387 arg_show_status = SHOW_STATUS_AUTO;
388
389 } else if (streq(key, "debug") && !value) {
390
391 log_set_max_level(LOG_DEBUG);
392
393 if (detect_container(NULL) > 0)
394 log_set_target(LOG_TARGET_CONSOLE);
395
396 } else if (!in_initrd() && !value) {
397 unsigned i;
398
399 /* SysV compatibility */
400 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
401 if (streq(key, rlmap[i]))
402 return set_default_unit(rlmap[i+1]);
403 }
404
405 return 0;
406 }
407
408 #define DEFINE_SETTER(name, func, descr) \
409 static int name(const char *unit, \
410 const char *filename, \
411 unsigned line, \
412 const char *section, \
413 unsigned section_line, \
414 const char *lvalue, \
415 int ltype, \
416 const char *rvalue, \
417 void *data, \
418 void *userdata) { \
419 \
420 int r; \
421 \
422 assert(filename); \
423 assert(lvalue); \
424 assert(rvalue); \
425 \
426 r = func(rvalue); \
427 if (r < 0) \
428 log_syntax(unit, LOG_ERR, filename, line, -r, \
429 "Invalid " descr "'%s': %s", \
430 rvalue, strerror(-r)); \
431 \
432 return 0; \
433 }
434
435 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
436 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
437 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
438 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
439
440 static int config_parse_cpu_affinity2(
441 const char *unit,
442 const char *filename,
443 unsigned line,
444 const char *section,
445 unsigned section_line,
446 const char *lvalue,
447 int ltype,
448 const char *rvalue,
449 void *data,
450 void *userdata) {
451
452 const char *word, *state;
453 size_t l;
454 cpu_set_t *c = NULL;
455 unsigned ncpus = 0;
456
457 assert(filename);
458 assert(lvalue);
459 assert(rvalue);
460
461 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
462 char *t;
463 int r;
464 unsigned cpu;
465
466 if (!(t = strndup(word, l)))
467 return log_oom();
468
469 r = safe_atou(t, &cpu);
470 free(t);
471
472 if (!c)
473 if (!(c = cpu_set_malloc(&ncpus)))
474 return log_oom();
475
476 if (r < 0 || cpu >= ncpus) {
477 log_syntax(unit, LOG_ERR, filename, line, -r,
478 "Failed to parse CPU affinity '%s'", rvalue);
479 CPU_FREE(c);
480 return -EBADMSG;
481 }
482
483 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
484 }
485 if (!isempty(state))
486 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
487 "Trailing garbage, ignoring.");
488
489 if (c) {
490 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
491 log_warning_unit(unit, "Failed to set CPU affinity: %m");
492
493 CPU_FREE(c);
494 }
495
496 return 0;
497 }
498
499 static int config_parse_show_status(
500 const char* unit,
501 const char *filename,
502 unsigned line,
503 const char *section,
504 unsigned section_line,
505 const char *lvalue,
506 int ltype,
507 const char *rvalue,
508 void *data,
509 void *userdata) {
510
511 int k;
512 ShowStatus *b = data;
513
514 assert(filename);
515 assert(lvalue);
516 assert(rvalue);
517 assert(data);
518
519 k = parse_show_status(rvalue, b);
520 if (k < 0) {
521 log_syntax(unit, LOG_ERR, filename, line, -k,
522 "Failed to parse show status setting, ignoring: %s", rvalue);
523 return 0;
524 }
525
526 return 0;
527 }
528
529 static void strv_free_free(char ***l) {
530 char ***i;
531
532 if (!l)
533 return;
534
535 for (i = l; *i; i++)
536 strv_free(*i);
537
538 free(l);
539 }
540
541 static void free_join_controllers(void) {
542 strv_free_free(arg_join_controllers);
543 arg_join_controllers = NULL;
544 }
545
546 static int config_parse_join_controllers(const char *unit,
547 const char *filename,
548 unsigned line,
549 const char *section,
550 unsigned section_line,
551 const char *lvalue,
552 int ltype,
553 const char *rvalue,
554 void *data,
555 void *userdata) {
556
557 unsigned n = 0;
558 const char *word, *state;
559 size_t length;
560
561 assert(filename);
562 assert(lvalue);
563 assert(rvalue);
564
565 free_join_controllers();
566
567 FOREACH_WORD_QUOTED(word, length, rvalue, state) {
568 char *s, **l;
569
570 s = strndup(word, length);
571 if (!s)
572 return log_oom();
573
574 l = strv_split(s, ",");
575 free(s);
576
577 strv_uniq(l);
578
579 if (strv_length(l) <= 1) {
580 strv_free(l);
581 continue;
582 }
583
584 if (!arg_join_controllers) {
585 arg_join_controllers = new(char**, 2);
586 if (!arg_join_controllers) {
587 strv_free(l);
588 return log_oom();
589 }
590
591 arg_join_controllers[0] = l;
592 arg_join_controllers[1] = NULL;
593
594 n = 1;
595 } else {
596 char ***a;
597 char ***t;
598
599 t = new0(char**, n+2);
600 if (!t) {
601 strv_free(l);
602 return log_oom();
603 }
604
605 n = 0;
606
607 for (a = arg_join_controllers; *a; a++) {
608
609 if (strv_overlap(*a, l)) {
610 if (strv_extend_strv(&l, *a) < 0) {
611 strv_free(l);
612 strv_free_free(t);
613 return log_oom();
614 }
615
616 } else {
617 char **c;
618
619 c = strv_copy(*a);
620 if (!c) {
621 strv_free(l);
622 strv_free_free(t);
623 return log_oom();
624 }
625
626 t[n++] = c;
627 }
628 }
629
630 t[n++] = strv_uniq(l);
631
632 strv_free_free(arg_join_controllers);
633 arg_join_controllers = t;
634 }
635 }
636 if (!isempty(state))
637 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
638 "Trailing garbage, ignoring.");
639
640 return 0;
641 }
642
643 static int parse_config_file(void) {
644
645 const ConfigTableItem items[] = {
646 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
647 { "Manager", "LogTarget", config_parse_target, 0, NULL },
648 { "Manager", "LogColor", config_parse_color, 0, NULL },
649 { "Manager", "LogLocation", config_parse_location, 0, NULL },
650 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
651 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
652 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
653 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
654 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
655 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
656 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
657 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
658 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
659 #ifdef HAVE_SECCOMP
660 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
661 #endif
662 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
663 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
664 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
665 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
666 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
667 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
668 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
669 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
670 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
671 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
672 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
673 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
674 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
675 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
676 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
677 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
678 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
679 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
680 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
681 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
682 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
683 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
684 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
685 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
686 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
687 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
688 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
689 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
690 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
691 {}
692 };
693
694 const char *fn;
695
696 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
697 config_parse(NULL, fn, NULL,
698 "Manager\0",
699 config_item_table_lookup, items,
700 false, false, true, NULL);
701
702 return 0;
703 }
704
705 static int parse_argv(int argc, char *argv[]) {
706
707 enum {
708 ARG_LOG_LEVEL = 0x100,
709 ARG_LOG_TARGET,
710 ARG_LOG_COLOR,
711 ARG_LOG_LOCATION,
712 ARG_UNIT,
713 ARG_SYSTEM,
714 ARG_USER,
715 ARG_TEST,
716 ARG_NO_PAGER,
717 ARG_VERSION,
718 ARG_DUMP_CONFIGURATION_ITEMS,
719 ARG_DUMP_CORE,
720 ARG_CRASH_SHELL,
721 ARG_CONFIRM_SPAWN,
722 ARG_SHOW_STATUS,
723 ARG_DESERIALIZE,
724 ARG_SWITCHED_ROOT,
725 ARG_DEFAULT_STD_OUTPUT,
726 ARG_DEFAULT_STD_ERROR
727 };
728
729 static const struct option options[] = {
730 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
731 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
732 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
733 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
734 { "unit", required_argument, NULL, ARG_UNIT },
735 { "system", no_argument, NULL, ARG_SYSTEM },
736 { "user", no_argument, NULL, ARG_USER },
737 { "test", no_argument, NULL, ARG_TEST },
738 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
739 { "help", no_argument, NULL, 'h' },
740 { "version", no_argument, NULL, ARG_VERSION },
741 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
742 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
743 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
744 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
745 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
746 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
747 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
748 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
749 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
750 {}
751 };
752
753 int c, r;
754
755 assert(argc >= 1);
756 assert(argv);
757
758 if (getpid() == 1)
759 opterr = 0;
760
761 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
762
763 switch (c) {
764
765 case ARG_LOG_LEVEL:
766 r = log_set_max_level_from_string(optarg);
767 if (r < 0) {
768 log_error("Failed to parse log level %s.", optarg);
769 return r;
770 }
771
772 break;
773
774 case ARG_LOG_TARGET:
775 r = log_set_target_from_string(optarg);
776 if (r < 0) {
777 log_error("Failed to parse log target %s.", optarg);
778 return r;
779 }
780
781 break;
782
783 case ARG_LOG_COLOR:
784
785 if (optarg) {
786 r = log_show_color_from_string(optarg);
787 if (r < 0) {
788 log_error("Failed to parse log color setting %s.", optarg);
789 return r;
790 }
791 } else
792 log_show_color(true);
793
794 break;
795
796 case ARG_LOG_LOCATION:
797 if (optarg) {
798 r = log_show_location_from_string(optarg);
799 if (r < 0) {
800 log_error("Failed to parse log location setting %s.", optarg);
801 return r;
802 }
803 } else
804 log_show_location(true);
805
806 break;
807
808 case ARG_DEFAULT_STD_OUTPUT:
809 r = exec_output_from_string(optarg);
810 if (r < 0) {
811 log_error("Failed to parse default standard output setting %s.", optarg);
812 return r;
813 } else
814 arg_default_std_output = r;
815 break;
816
817 case ARG_DEFAULT_STD_ERROR:
818 r = exec_output_from_string(optarg);
819 if (r < 0) {
820 log_error("Failed to parse default standard error output setting %s.", optarg);
821 return r;
822 } else
823 arg_default_std_error = r;
824 break;
825
826 case ARG_UNIT:
827
828 r = set_default_unit(optarg);
829 if (r < 0) {
830 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
831 return r;
832 }
833
834 break;
835
836 case ARG_SYSTEM:
837 arg_running_as = SYSTEMD_SYSTEM;
838 break;
839
840 case ARG_USER:
841 arg_running_as = SYSTEMD_USER;
842 break;
843
844 case ARG_TEST:
845 arg_action = ACTION_TEST;
846 if (arg_no_pager < 0)
847 arg_no_pager = true;
848 break;
849
850 case ARG_NO_PAGER:
851 arg_no_pager = true;
852 break;
853
854 case ARG_VERSION:
855 arg_action = ACTION_VERSION;
856 break;
857
858 case ARG_DUMP_CONFIGURATION_ITEMS:
859 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
860 break;
861
862 case ARG_DUMP_CORE:
863 r = optarg ? parse_boolean(optarg) : 1;
864 if (r < 0) {
865 log_error("Failed to parse dump core boolean %s.", optarg);
866 return r;
867 }
868 arg_dump_core = r;
869 break;
870
871 case ARG_CRASH_SHELL:
872 r = optarg ? parse_boolean(optarg) : 1;
873 if (r < 0) {
874 log_error("Failed to parse crash shell boolean %s.", optarg);
875 return r;
876 }
877 arg_crash_shell = r;
878 break;
879
880 case ARG_CONFIRM_SPAWN:
881 r = optarg ? parse_boolean(optarg) : 1;
882 if (r < 0) {
883 log_error("Failed to parse confirm spawn boolean %s.", optarg);
884 return r;
885 }
886 arg_confirm_spawn = r;
887 break;
888
889 case ARG_SHOW_STATUS:
890 if (optarg) {
891 r = parse_show_status(optarg, &arg_show_status);
892 if (r < 0) {
893 log_error("Failed to parse show status boolean %s.", optarg);
894 return r;
895 }
896 } else
897 arg_show_status = SHOW_STATUS_YES;
898 break;
899
900 case ARG_DESERIALIZE: {
901 int fd;
902 FILE *f;
903
904 r = safe_atoi(optarg, &fd);
905 if (r < 0 || fd < 0) {
906 log_error("Failed to parse deserialize option %s.", optarg);
907 return r < 0 ? r : -EINVAL;
908 }
909
910 fd_cloexec(fd, true);
911
912 f = fdopen(fd, "r");
913 if (!f) {
914 log_error("Failed to open serialization fd: %m");
915 return -errno;
916 }
917
918 if (arg_serialization)
919 fclose(arg_serialization);
920
921 arg_serialization = f;
922
923 break;
924 }
925
926 case ARG_SWITCHED_ROOT:
927 arg_switched_root = true;
928 break;
929
930 case 'h':
931 arg_action = ACTION_HELP;
932 if (arg_no_pager < 0)
933 arg_no_pager = true;
934 break;
935
936 case 'D':
937 log_set_max_level(LOG_DEBUG);
938 break;
939
940 case 'b':
941 case 's':
942 case 'z':
943 /* Just to eat away the sysvinit kernel
944 * cmdline args without getopt() error
945 * messages that we'll parse in
946 * parse_proc_cmdline_word() or ignore. */
947
948 case '?':
949 if (getpid() != 1)
950 return -EINVAL;
951 else
952 return 0;
953
954 default:
955 assert_not_reached("Unhandled option code.");
956 }
957
958 if (optind < argc && getpid() != 1) {
959 /* Hmm, when we aren't run as init system
960 * let's complain about excess arguments */
961
962 log_error("Excess arguments.");
963 return -EINVAL;
964 }
965
966 if (detect_container(NULL) > 0) {
967 char **a;
968
969 /* All /proc/cmdline arguments the kernel didn't
970 * understand it passed to us. We're not really
971 * interested in that usually since /proc/cmdline is
972 * more interesting and complete. With one exception:
973 * if we are run in a container /proc/cmdline is not
974 * relevant for the container, hence we rely on argv[]
975 * instead. */
976
977 for (a = argv; a < argv + argc; a++) {
978 _cleanup_free_ char *w;
979 char *value;
980
981 w = strdup(*a);
982 if (!w)
983 return log_oom();
984
985 value = strchr(w, '=');
986 if (value)
987 *(value++) = 0;
988
989 r = parse_proc_cmdline_item(w, value);
990 if (r < 0) {
991 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
992 return r;
993 }
994 }
995 }
996
997 return 0;
998 }
999
1000 static int help(void) {
1001
1002 printf("%s [OPTIONS...]\n\n"
1003 "Starts up and maintains the system or user services.\n\n"
1004 " -h --help Show this help\n"
1005 " --test Determine startup sequence, dump it and exit\n"
1006 " --no-pager Do not pipe output into a pager\n"
1007 " --dump-configuration-items Dump understood unit configuration items\n"
1008 " --unit=UNIT Set default unit\n"
1009 " --system Run a system instance, even if PID != 1\n"
1010 " --user Run a user instance\n"
1011 " --dump-core[=0|1] Dump core on crash\n"
1012 " --crash-shell[=0|1] Run shell on crash\n"
1013 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1014 " --show-status[=0|1] Show status updates on the console during bootup\n"
1015 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
1016 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1017 " --log-color[=0|1] Highlight important log messages\n"
1018 " --log-location[=0|1] Include code location in log messages\n"
1019 " --default-standard-output= Set default standard output for services\n"
1020 " --default-standard-error= Set default standard error output for services\n",
1021 program_invocation_short_name);
1022
1023 return 0;
1024 }
1025
1026 static int version(void) {
1027 puts(PACKAGE_STRING);
1028 puts(SYSTEMD_FEATURES);
1029
1030 return 0;
1031 }
1032
1033 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1034 FILE *f = NULL;
1035 FDSet *fds = NULL;
1036 int r;
1037
1038 assert(m);
1039 assert(_f);
1040 assert(_fds);
1041
1042 r = manager_open_serialization(m, &f);
1043 if (r < 0) {
1044 log_error("Failed to create serialization file: %s", strerror(-r));
1045 goto fail;
1046 }
1047
1048 /* Make sure nothing is really destructed when we shut down */
1049 m->n_reloading ++;
1050 bus_manager_send_reloading(m, true);
1051
1052 fds = fdset_new();
1053 if (!fds) {
1054 r = -ENOMEM;
1055 log_error("Failed to allocate fd set: %s", strerror(-r));
1056 goto fail;
1057 }
1058
1059 r = manager_serialize(m, f, fds, switching_root);
1060 if (r < 0) {
1061 log_error("Failed to serialize state: %s", strerror(-r));
1062 goto fail;
1063 }
1064
1065 if (fseeko(f, 0, SEEK_SET) < 0) {
1066 log_error("Failed to rewind serialization fd: %m");
1067 goto fail;
1068 }
1069
1070 r = fd_cloexec(fileno(f), false);
1071 if (r < 0) {
1072 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1073 goto fail;
1074 }
1075
1076 r = fdset_cloexec(fds, false);
1077 if (r < 0) {
1078 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1079 goto fail;
1080 }
1081
1082 *_f = f;
1083 *_fds = fds;
1084
1085 return 0;
1086
1087 fail:
1088 fdset_free(fds);
1089
1090 if (f)
1091 fclose(f);
1092
1093 return r;
1094 }
1095
1096 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1097 struct rlimit nl;
1098 int r;
1099
1100 assert(saved_rlimit);
1101
1102 /* Save the original RLIMIT_NOFILE so that we can reset it
1103 * later when transitioning from the initrd to the main
1104 * systemd or suchlike. */
1105 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1106 log_error("Reading RLIMIT_NOFILE failed: %m");
1107 return -errno;
1108 }
1109
1110 /* Make sure forked processes get the default kernel setting */
1111 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1112 struct rlimit *rl;
1113
1114 rl = newdup(struct rlimit, saved_rlimit, 1);
1115 if (!rl)
1116 return log_oom();
1117
1118 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1119 }
1120
1121 /* Bump up the resource limit for ourselves substantially */
1122 nl.rlim_cur = nl.rlim_max = 64*1024;
1123 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1124 if (r < 0) {
1125 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1126 return r;
1127 }
1128
1129 return 0;
1130 }
1131
1132 static void test_mtab(void) {
1133
1134 static const char ok[] =
1135 "/proc/self/mounts\0"
1136 "/proc/mounts\0"
1137 "../proc/self/mounts\0"
1138 "../proc/mounts\0";
1139
1140 _cleanup_free_ char *p = NULL;
1141 int r;
1142
1143 /* Check that /etc/mtab is a symlink to the right place or
1144 * non-existing. But certainly not a file, or a symlink to
1145 * some weird place... */
1146
1147 r = readlink_malloc("/etc/mtab", &p);
1148 if (r == -ENOENT)
1149 return;
1150 if (r >= 0 && nulstr_contains(ok, p))
1151 return;
1152
1153 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1154 "This is not supported anymore. "
1155 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1156 }
1157
1158 static void test_usr(void) {
1159
1160 /* Check that /usr is not a separate fs */
1161
1162 if (dir_is_empty("/usr") <= 0)
1163 return;
1164
1165 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1166 "Some things will probably break (sometimes even silently) in mysterious ways. "
1167 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1168 }
1169
1170 static int initialize_join_controllers(void) {
1171 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1172 * + "net_prio". We'd like to add "cpuset" to the mix, but
1173 * "cpuset" does't really work for groups with no initialized
1174 * attributes. */
1175
1176 arg_join_controllers = new(char**, 3);
1177 if (!arg_join_controllers)
1178 return -ENOMEM;
1179
1180 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1181 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1182 arg_join_controllers[2] = NULL;
1183
1184 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1185 free_join_controllers();
1186 return -ENOMEM;
1187 }
1188
1189 return 0;
1190 }
1191
1192 static int enforce_syscall_archs(Set *archs) {
1193 #ifdef HAVE_SECCOMP
1194 scmp_filter_ctx *seccomp;
1195 Iterator i;
1196 void *id;
1197 int r;
1198
1199 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1200 if (!seccomp)
1201 return log_oom();
1202
1203 SET_FOREACH(id, arg_syscall_archs, i) {
1204 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1205 if (r == -EEXIST)
1206 continue;
1207 if (r < 0) {
1208 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1209 goto finish;
1210 }
1211 }
1212
1213 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1214 if (r < 0) {
1215 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1216 goto finish;
1217 }
1218
1219 r = seccomp_load(seccomp);
1220 if (r < 0)
1221 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1222
1223 finish:
1224 seccomp_release(seccomp);
1225 return r;
1226 #else
1227 return 0;
1228 #endif
1229 }
1230
1231 static int status_welcome(void) {
1232 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1233 int r;
1234
1235 r = parse_env_file("/etc/os-release", NEWLINE,
1236 "PRETTY_NAME", &pretty_name,
1237 "ANSI_COLOR", &ansi_color,
1238 NULL);
1239 if (r == -ENOENT) {
1240 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1241 "PRETTY_NAME", &pretty_name,
1242 "ANSI_COLOR", &ansi_color,
1243 NULL);
1244 }
1245
1246 if (r < 0 && r != -ENOENT)
1247 log_warning("Failed to read os-release file: %s", strerror(-r));
1248
1249 return status_printf(NULL, false, false,
1250 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1251 isempty(ansi_color) ? "1" : ansi_color,
1252 isempty(pretty_name) ? "Linux" : pretty_name);
1253 }
1254
1255 static int write_container_id(void) {
1256 const char *c;
1257
1258 c = getenv("container");
1259 if (isempty(c))
1260 return 0;
1261
1262 return write_string_file("/run/systemd/container", c);
1263 }
1264
1265 int main(int argc, char *argv[]) {
1266 Manager *m = NULL;
1267 int r, retval = EXIT_FAILURE;
1268 usec_t before_startup, after_startup;
1269 char timespan[FORMAT_TIMESPAN_MAX];
1270 FDSet *fds = NULL;
1271 bool reexecute = false;
1272 const char *shutdown_verb = NULL;
1273 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1274 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1275 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1276 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1277 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1278 static char systemd[] = "systemd";
1279 bool skip_setup = false;
1280 unsigned j;
1281 bool loaded_policy = false;
1282 bool arm_reboot_watchdog = false;
1283 bool queue_default_job = false;
1284 bool empty_etc = false;
1285 char *switch_root_dir = NULL, *switch_root_init = NULL;
1286 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1287
1288 #ifdef HAVE_SYSV_COMPAT
1289 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1290 /* This is compatibility support for SysV, where
1291 * calling init as a user is identical to telinit. */
1292
1293 errno = -ENOENT;
1294 execv(SYSTEMCTL_BINARY_PATH, argv);
1295 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1296 return 1;
1297 }
1298 #endif
1299
1300 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1301 dual_timestamp_get(&userspace_timestamp);
1302
1303 /* Determine if this is a reexecution or normal bootup. We do
1304 * the full command line parsing much later, so let's just
1305 * have a quick peek here. */
1306 if (strv_find(argv+1, "--deserialize"))
1307 skip_setup = true;
1308
1309 /* If we have switched root, do all the special setup
1310 * things */
1311 if (strv_find(argv+1, "--switched-root"))
1312 skip_setup = false;
1313
1314 /* If we get started via the /sbin/init symlink then we are
1315 called 'init'. After a subsequent reexecution we are then
1316 called 'systemd'. That is confusing, hence let's call us
1317 systemd right-away. */
1318 program_invocation_short_name = systemd;
1319 prctl(PR_SET_NAME, systemd);
1320
1321 saved_argv = argv;
1322 saved_argc = argc;
1323
1324 log_show_color(isatty(STDERR_FILENO) > 0);
1325 log_set_upgrade_syslog_to_journal(true);
1326
1327 /* Disable the umask logic */
1328 if (getpid() == 1)
1329 umask(0);
1330
1331 if (getpid() == 1 && detect_container(NULL) <= 0) {
1332
1333 /* Running outside of a container as PID 1 */
1334 arg_running_as = SYSTEMD_SYSTEM;
1335 make_null_stdio();
1336 log_set_target(LOG_TARGET_KMSG);
1337 log_open();
1338
1339 if (in_initrd())
1340 initrd_timestamp = userspace_timestamp;
1341
1342 if (!skip_setup) {
1343 mount_setup_early();
1344 dual_timestamp_get(&security_start_timestamp);
1345 if (selinux_setup(&loaded_policy) < 0)
1346 goto finish;
1347 if (ima_setup() < 0)
1348 goto finish;
1349 if (smack_setup(&loaded_policy) < 0)
1350 goto finish;
1351 dual_timestamp_get(&security_finish_timestamp);
1352 }
1353
1354 if (label_init(NULL) < 0)
1355 goto finish;
1356
1357 if (!skip_setup) {
1358 if (clock_is_localtime() > 0) {
1359 int min;
1360
1361 /*
1362 * The very first call of settimeofday() also does a time warp in the kernel.
1363 *
1364 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1365 * external tools to take care of maintaining the RTC and do all adjustments.
1366 * This matches the behavior of Windows, which leaves the RTC alone if the
1367 * registry tells that the RTC runs in UTC.
1368 */
1369 r = clock_set_timezone(&min);
1370 if (r < 0)
1371 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1372 else
1373 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1374 } else if (!in_initrd()) {
1375 /*
1376 * Do a dummy very first call to seal the kernel's time warp magic.
1377 *
1378 * Do not call this this from inside the initrd. The initrd might not
1379 * carry /etc/adjtime with LOCAL, but the real system could be set up
1380 * that way. In such case, we need to delay the time-warp or the sealing
1381 * until we reach the real system.
1382 *
1383 * Do no set the kernel's timezone. The concept of local time cannot
1384 * be supported reliably, the time will jump or be incorrect at every daylight
1385 * saving time change. All kernel local time concepts will be treated
1386 * as UTC that way.
1387 */
1388 clock_reset_timewarp();
1389 }
1390 }
1391
1392 /* Set the default for later on, but don't actually
1393 * open the logs like this for now. Note that if we
1394 * are transitioning from the initrd there might still
1395 * be journal fd open, and we shouldn't attempt
1396 * opening that before we parsed /proc/cmdline which
1397 * might redirect output elsewhere. */
1398 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1399
1400 } else if (getpid() == 1) {
1401 /* Running inside a container, as PID 1 */
1402 arg_running_as = SYSTEMD_SYSTEM;
1403 log_set_target(LOG_TARGET_CONSOLE);
1404 log_close_console(); /* force reopen of /dev/console */
1405 log_open();
1406
1407 /* For the later on, see above... */
1408 log_set_target(LOG_TARGET_JOURNAL);
1409
1410 /* clear the kernel timestamp,
1411 * because we are in a container */
1412 kernel_timestamp.monotonic = 0ULL;
1413 kernel_timestamp.realtime = 0ULL;
1414
1415 } else {
1416 /* Running as user instance */
1417 arg_running_as = SYSTEMD_USER;
1418 log_set_target(LOG_TARGET_AUTO);
1419 log_open();
1420
1421 /* clear the kernel timestamp,
1422 * because we are not PID 1 */
1423 kernel_timestamp.monotonic = 0ULL;
1424 kernel_timestamp.realtime = 0ULL;
1425 }
1426
1427 /* Initialize default unit */
1428 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1429 if (r < 0) {
1430 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1431 goto finish;
1432 }
1433
1434 r = initialize_join_controllers();
1435 if (r < 0)
1436 goto finish;
1437
1438 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1439 * /proc/$PID/fd is available. */
1440 if (getpid() == 1) {
1441 r = mount_setup(loaded_policy);
1442 if (r < 0)
1443 goto finish;
1444 }
1445
1446 /* Reset all signal handlers. */
1447 assert_se(reset_all_signal_handlers() == 0);
1448
1449 ignore_signals(SIGNALS_IGNORE, -1);
1450
1451 if (parse_config_file() < 0)
1452 goto finish;
1453
1454 if (arg_running_as == SYSTEMD_SYSTEM)
1455 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1456 goto finish;
1457
1458 log_parse_environment();
1459
1460 if (parse_argv(argc, argv) < 0)
1461 goto finish;
1462
1463 if (arg_action == ACTION_TEST &&
1464 geteuid() == 0) {
1465 log_error("Don't run test mode as root.");
1466 goto finish;
1467 }
1468
1469 if (arg_running_as == SYSTEMD_USER &&
1470 arg_action == ACTION_RUN &&
1471 sd_booted() <= 0) {
1472 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1473 goto finish;
1474 }
1475
1476 if (arg_running_as == SYSTEMD_SYSTEM &&
1477 arg_action == ACTION_RUN &&
1478 running_in_chroot() > 0) {
1479 log_error("Cannot be run in a chroot() environment.");
1480 goto finish;
1481 }
1482
1483 if (arg_action == ACTION_TEST)
1484 skip_setup = true;
1485
1486 pager_open_if_enabled();
1487
1488 if (arg_action == ACTION_HELP) {
1489 retval = help();
1490 goto finish;
1491 } else if (arg_action == ACTION_VERSION) {
1492 retval = version();
1493 goto finish;
1494 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1495 unit_dump_config_items(stdout);
1496 retval = EXIT_SUCCESS;
1497 goto finish;
1498 } else if (arg_action == ACTION_DONE) {
1499 retval = EXIT_SUCCESS;
1500 goto finish;
1501 }
1502
1503 if (arg_running_as == SYSTEMD_USER &&
1504 !getenv("XDG_RUNTIME_DIR")) {
1505 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1506 goto finish;
1507 }
1508
1509 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1510
1511 /* Close logging fds, in order not to confuse fdset below */
1512 log_close();
1513
1514 /* Remember open file descriptors for later deserialization */
1515 r = fdset_new_fill(&fds);
1516 if (r < 0) {
1517 log_error("Failed to allocate fd set: %s", strerror(-r));
1518 goto finish;
1519 } else
1520 fdset_cloexec(fds, true);
1521
1522 if (arg_serialization)
1523 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1524
1525 if (arg_running_as == SYSTEMD_SYSTEM)
1526 /* Become a session leader if we aren't one yet. */
1527 setsid();
1528
1529 /* Move out of the way, so that we won't block unmounts */
1530 assert_se(chdir("/") == 0);
1531
1532 /* Reset the console, but only if this is really init and we
1533 * are freshly booted */
1534 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN) {
1535
1536 /* If we are init, we connect stdin/stdout/stderr to
1537 * /dev/null and make sure we don't have a controlling
1538 * tty. */
1539 release_terminal();
1540
1541 if (getpid() == 1 && !skip_setup)
1542 console_setup();
1543 }
1544
1545 /* Open the logging devices, if possible and necessary */
1546 log_open();
1547
1548 if (arg_show_status == _SHOW_STATUS_UNSET)
1549 arg_show_status = SHOW_STATUS_YES;
1550
1551 /* Make sure we leave a core dump without panicing the
1552 * kernel. */
1553 if (getpid() == 1) {
1554 install_crash_handler();
1555
1556 r = mount_cgroup_controllers(arg_join_controllers);
1557 if (r < 0)
1558 goto finish;
1559 }
1560
1561 if (arg_running_as == SYSTEMD_SYSTEM) {
1562 const char *virtualization = NULL;
1563
1564 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1565 arg_action == ACTION_TEST ? "test " : "" );
1566
1567 detect_virtualization(&virtualization);
1568 if (virtualization)
1569 log_info("Detected virtualization '%s'.", virtualization);
1570
1571 write_container_id();
1572
1573 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1574
1575 if (in_initrd())
1576 log_info("Running in initial RAM disk.");
1577
1578 /* Let's check whether /etc is already populated. We
1579 * don't actually really check for that, but use
1580 * /etc/machine-id as flag file. This allows container
1581 * managers and installers to provision a couple of
1582 * files already. If the container manager wants to
1583 * provision the machine ID itself it should pass
1584 * $container_uuid to PID 1.*/
1585
1586 empty_etc = access("/etc/machine-id", F_OK) < 0;
1587 if (empty_etc)
1588 log_info("Running with unpopulated /etc.");
1589 } else {
1590 _cleanup_free_ char *t;
1591
1592 t = uid_to_name(getuid());
1593 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1594 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1595 }
1596
1597 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1598 if (arg_show_status > 0 || plymouth_running())
1599 status_welcome();
1600
1601 #ifdef HAVE_KMOD
1602 kmod_setup();
1603 #endif
1604 hostname_setup();
1605 machine_id_setup(NULL);
1606 loopback_setup();
1607
1608 test_mtab();
1609 test_usr();
1610 }
1611
1612 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1613 watchdog_set_timeout(&arg_runtime_watchdog);
1614
1615 if (arg_timer_slack_nsec != NSEC_INFINITY)
1616 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1617 log_error("Failed to adjust timer slack: %m");
1618
1619 if (arg_capability_bounding_set_drop) {
1620 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1621 if (r < 0) {
1622 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1623 goto finish;
1624 }
1625 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1626 if (r < 0) {
1627 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1628 goto finish;
1629 }
1630 }
1631
1632 if (arg_syscall_archs) {
1633 r = enforce_syscall_archs(arg_syscall_archs);
1634 if (r < 0)
1635 goto finish;
1636 }
1637
1638 if (arg_running_as == SYSTEMD_USER) {
1639 /* Become reaper of our children */
1640 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1641 log_warning("Failed to make us a subreaper: %m");
1642 if (errno == EINVAL)
1643 log_info("Perhaps the kernel version is too old (< 3.4?)");
1644 }
1645 }
1646
1647 if (arg_running_as == SYSTEMD_SYSTEM) {
1648 bump_rlimit_nofile(&saved_rlimit_nofile);
1649
1650 if (empty_etc) {
1651 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1652 if (r < 0)
1653 log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
1654 else
1655 log_info("Populated /etc with preset unit settings.");
1656 }
1657 }
1658
1659 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1660 if (r < 0) {
1661 log_error("Failed to allocate manager object: %s", strerror(-r));
1662 goto finish;
1663 }
1664
1665 m->confirm_spawn = arg_confirm_spawn;
1666 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1667 m->default_std_output = arg_default_std_output;
1668 m->default_std_error = arg_default_std_error;
1669 m->default_restart_usec = arg_default_restart_usec;
1670 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1671 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1672 m->default_start_limit_interval = arg_default_start_limit_interval;
1673 m->default_start_limit_burst = arg_default_start_limit_burst;
1674 m->default_cpu_accounting = arg_default_cpu_accounting;
1675 m->default_blockio_accounting = arg_default_blockio_accounting;
1676 m->default_memory_accounting = arg_default_memory_accounting;
1677 m->runtime_watchdog = arg_runtime_watchdog;
1678 m->shutdown_watchdog = arg_shutdown_watchdog;
1679 m->userspace_timestamp = userspace_timestamp;
1680 m->kernel_timestamp = kernel_timestamp;
1681 m->initrd_timestamp = initrd_timestamp;
1682 m->security_start_timestamp = security_start_timestamp;
1683 m->security_finish_timestamp = security_finish_timestamp;
1684
1685 manager_set_default_rlimits(m, arg_default_rlimit);
1686 manager_environment_add(m, NULL, arg_default_environment);
1687 manager_set_show_status(m, arg_show_status);
1688 manager_set_first_boot(m, empty_etc);
1689
1690 /* Remember whether we should queue the default job */
1691 queue_default_job = !arg_serialization || arg_switched_root;
1692
1693 before_startup = now(CLOCK_MONOTONIC);
1694
1695 r = manager_startup(m, arg_serialization, fds);
1696 if (r < 0)
1697 log_error("Failed to fully start up daemon: %s", strerror(-r));
1698
1699 /* This will close all file descriptors that were opened, but
1700 * not claimed by any unit. */
1701 fdset_free(fds);
1702 fds = NULL;
1703
1704 if (arg_serialization) {
1705 fclose(arg_serialization);
1706 arg_serialization = NULL;
1707 }
1708
1709 if (queue_default_job) {
1710 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1711 Unit *target = NULL;
1712 Job *default_unit_job;
1713
1714 log_debug("Activating default unit: %s", arg_default_unit);
1715
1716 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1717 if (r < 0)
1718 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1719 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1720 log_error("Failed to load default target: %s", strerror(-target->load_error));
1721 else if (target->load_state == UNIT_MASKED)
1722 log_error("Default target masked.");
1723
1724 if (!target || target->load_state != UNIT_LOADED) {
1725 log_info("Trying to load rescue target...");
1726
1727 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1728 if (r < 0) {
1729 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1730 goto finish;
1731 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1732 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1733 goto finish;
1734 } else if (target->load_state == UNIT_MASKED) {
1735 log_error("Rescue target masked.");
1736 goto finish;
1737 }
1738 }
1739
1740 assert(target->load_state == UNIT_LOADED);
1741
1742 if (arg_action == ACTION_TEST) {
1743 printf("-> By units:\n");
1744 manager_dump_units(m, stdout, "\t");
1745 }
1746
1747 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1748 if (r == -EPERM) {
1749 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1750
1751 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1752 if (r < 0) {
1753 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1754 goto finish;
1755 }
1756 } else if (r < 0) {
1757 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1758 goto finish;
1759 }
1760
1761 m->default_unit_job_id = default_unit_job->id;
1762
1763 after_startup = now(CLOCK_MONOTONIC);
1764 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1765 "Loaded units and determined initial transaction in %s.",
1766 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1767
1768 if (arg_action == ACTION_TEST) {
1769 printf("-> By jobs:\n");
1770 manager_dump_jobs(m, stdout, "\t");
1771 retval = EXIT_SUCCESS;
1772 goto finish;
1773 }
1774 }
1775
1776 for (;;) {
1777 r = manager_loop(m);
1778 if (r < 0) {
1779 log_error("Failed to run mainloop: %s", strerror(-r));
1780 goto finish;
1781 }
1782
1783 switch (m->exit_code) {
1784
1785 case MANAGER_EXIT:
1786 retval = EXIT_SUCCESS;
1787 log_debug("Exit.");
1788 goto finish;
1789
1790 case MANAGER_RELOAD:
1791 log_info("Reloading.");
1792 r = manager_reload(m);
1793 if (r < 0)
1794 log_error("Failed to reload: %s", strerror(-r));
1795 break;
1796
1797 case MANAGER_REEXECUTE:
1798
1799 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1800 goto finish;
1801
1802 reexecute = true;
1803 log_notice("Reexecuting.");
1804 goto finish;
1805
1806 case MANAGER_SWITCH_ROOT:
1807 /* Steal the switch root parameters */
1808 switch_root_dir = m->switch_root;
1809 switch_root_init = m->switch_root_init;
1810 m->switch_root = m->switch_root_init = NULL;
1811
1812 if (!switch_root_init)
1813 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1814 goto finish;
1815
1816 reexecute = true;
1817 log_notice("Switching root.");
1818 goto finish;
1819
1820 case MANAGER_REBOOT:
1821 case MANAGER_POWEROFF:
1822 case MANAGER_HALT:
1823 case MANAGER_KEXEC: {
1824 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1825 [MANAGER_REBOOT] = "reboot",
1826 [MANAGER_POWEROFF] = "poweroff",
1827 [MANAGER_HALT] = "halt",
1828 [MANAGER_KEXEC] = "kexec"
1829 };
1830
1831 assert_se(shutdown_verb = table[m->exit_code]);
1832 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1833
1834 log_notice("Shutting down.");
1835 goto finish;
1836 }
1837
1838 default:
1839 assert_not_reached("Unknown exit code.");
1840 }
1841 }
1842
1843 finish:
1844 pager_close();
1845
1846 if (m) {
1847 manager_free(m);
1848 m = NULL;
1849 }
1850
1851 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1852 free(arg_default_rlimit[j]);
1853 arg_default_rlimit[j] = NULL;
1854 }
1855
1856 free(arg_default_unit);
1857 arg_default_unit = NULL;
1858
1859 free_join_controllers();
1860
1861 strv_free(arg_default_environment);
1862 arg_default_environment = NULL;
1863
1864 set_free(arg_syscall_archs);
1865 arg_syscall_archs = NULL;
1866
1867 label_finish();
1868
1869 if (reexecute) {
1870 const char **args;
1871 unsigned i, args_size;
1872 sigset_t ss;
1873
1874 /* Close and disarm the watchdog, so that the new
1875 * instance can reinitialize it, but doesn't get
1876 * rebooted while we do that */
1877 watchdog_close(true);
1878
1879 /* Reset the RLIMIT_NOFILE to the kernel default, so
1880 * that the new systemd can pass the kernel default to
1881 * its child processes */
1882 if (saved_rlimit_nofile.rlim_cur > 0)
1883 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1884
1885 if (switch_root_dir) {
1886 /* Kill all remaining processes from the
1887 * initrd, but don't wait for them, so that we
1888 * can handle the SIGCHLD for them after
1889 * deserializing. */
1890 broadcast_signal(SIGTERM, false, true);
1891
1892 /* And switch root */
1893 r = switch_root(switch_root_dir);
1894 if (r < 0)
1895 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1896 }
1897
1898 args_size = MAX(6, argc+1);
1899 args = newa(const char*, args_size);
1900
1901 if (!switch_root_init) {
1902 char sfd[16];
1903
1904 /* First try to spawn ourselves with the right
1905 * path, and with full serialization. We do
1906 * this only if the user didn't specify an
1907 * explicit init to spawn. */
1908
1909 assert(arg_serialization);
1910 assert(fds);
1911
1912 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1913 char_array_0(sfd);
1914
1915 i = 0;
1916 args[i++] = SYSTEMD_BINARY_PATH;
1917 if (switch_root_dir)
1918 args[i++] = "--switched-root";
1919 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1920 args[i++] = "--deserialize";
1921 args[i++] = sfd;
1922 args[i++] = NULL;
1923
1924 /* do not pass along the environment we inherit from the kernel or initrd */
1925 if (switch_root_dir)
1926 clearenv();
1927
1928 assert(i <= args_size);
1929 execv(args[0], (char* const*) args);
1930 }
1931
1932 /* Try the fallback, if there is any, without any
1933 * serialization. We pass the original argv[] and
1934 * envp[]. (Well, modulo the ordering changes due to
1935 * getopt() in argv[], and some cleanups in envp[],
1936 * but let's hope that doesn't matter.) */
1937
1938 if (arg_serialization) {
1939 fclose(arg_serialization);
1940 arg_serialization = NULL;
1941 }
1942
1943 if (fds) {
1944 fdset_free(fds);
1945 fds = NULL;
1946 }
1947
1948 /* Reopen the console */
1949 make_console_stdio();
1950
1951 for (j = 1, i = 1; j < (unsigned) argc; j++)
1952 args[i++] = argv[j];
1953 args[i++] = NULL;
1954 assert(i <= args_size);
1955
1956 /* reenable any blocked signals, especially important
1957 * if we switch from initial ramdisk to init=... */
1958 reset_all_signal_handlers();
1959
1960 assert_se(sigemptyset(&ss) == 0);
1961 assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0);
1962
1963 if (switch_root_init) {
1964 args[0] = switch_root_init;
1965 execv(args[0], (char* const*) args);
1966 log_warning("Failed to execute configured init, trying fallback: %m");
1967 }
1968
1969 args[0] = "/sbin/init";
1970 execv(args[0], (char* const*) args);
1971
1972 if (errno == ENOENT) {
1973 log_warning("No /sbin/init, trying fallback");
1974
1975 args[0] = "/bin/sh";
1976 args[1] = NULL;
1977 execv(args[0], (char* const*) args);
1978 log_error("Failed to execute /bin/sh, giving up: %m");
1979 } else
1980 log_warning("Failed to execute /sbin/init, giving up: %m");
1981 }
1982
1983 if (arg_serialization) {
1984 fclose(arg_serialization);
1985 arg_serialization = NULL;
1986 }
1987
1988 if (fds) {
1989 fdset_free(fds);
1990 fds = NULL;
1991 }
1992
1993 #ifdef HAVE_VALGRIND_VALGRIND_H
1994 /* If we are PID 1 and running under valgrind, then let's exit
1995 * here explicitly. valgrind will only generate nice output on
1996 * exit(), not on exec(), hence let's do the former not the
1997 * latter here. */
1998 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1999 return 0;
2000 #endif
2001
2002 if (shutdown_verb) {
2003 char log_level[DECIMAL_STR_MAX(int) + 1];
2004 const char* command_line[9] = {
2005 SYSTEMD_SHUTDOWN_BINARY_PATH,
2006 shutdown_verb,
2007 "--log-level", log_level,
2008 "--log-target",
2009 };
2010 unsigned pos = 5;
2011 _cleanup_strv_free_ char **env_block = NULL;
2012
2013 assert(command_line[pos] == NULL);
2014 env_block = strv_copy(environ);
2015
2016 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
2017
2018 switch (log_get_target()) {
2019 case LOG_TARGET_KMSG:
2020 case LOG_TARGET_JOURNAL_OR_KMSG:
2021 case LOG_TARGET_SYSLOG_OR_KMSG:
2022 command_line[pos++] = "kmsg";
2023 break;
2024
2025 case LOG_TARGET_CONSOLE:
2026 default:
2027 command_line[pos++] = "console";
2028 break;
2029 };
2030
2031 if (log_get_show_color())
2032 command_line[pos++] = "--log-color";
2033
2034 if (log_get_show_location())
2035 command_line[pos++] = "--log-location";
2036
2037 assert(pos < ELEMENTSOF(command_line));
2038
2039 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2040 char *e;
2041
2042 /* If we reboot let's set the shutdown
2043 * watchdog and tell the shutdown binary to
2044 * repeatedly ping it */
2045 watchdog_set_timeout(&arg_shutdown_watchdog);
2046 watchdog_close(false);
2047
2048 /* Tell the binary how often to ping, ignore failure */
2049 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2050 strv_push(&env_block, e);
2051 } else
2052 watchdog_close(true);
2053
2054 /* Avoid the creation of new processes forked by the
2055 * kernel; at this point, we will not listen to the
2056 * signals anyway */
2057 if (detect_container(NULL) <= 0)
2058 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2059
2060 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2061 log_error("Failed to execute shutdown binary, %s: %m",
2062 getpid() == 1 ? "freezing" : "quitting");
2063 }
2064
2065 if (getpid() == 1)
2066 freeze();
2067
2068 return retval;
2069 }
Unnamed repository; edit this file 'description' to name the repository.