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