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