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[thirdparty/systemd.git] / src / systemctl.c
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7e4249b9
LP		 1/*-*- Mode: C; c-basic-offset: 8 -*-*/
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 General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
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 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
e4b61340 22#include <sys/reboot.h>
7e4249b9
LP		 23#include <stdio.h>
24#include <getopt.h>
25#include <stdbool.h>
26#include <string.h>
27#include <errno.h>
28#include <sys/ioctl.h>
29#include <termios.h>
30#include <unistd.h>
eb22ac37 31#include <fcntl.h>
f1c5860b 32#include <sys/socket.h>
7e4249b9
LP		 33
34#include <dbus/dbus.h>
35
36#include "log.h"
37#include "util.h"
38#include "macro.h"
39#include "set.h"
e4b61340 40#include "utmp-wtmp.h"
514f4ef5 41#include "special.h"
eb22ac37 42#include "initreq.h"
e4a9373f 43#include "strv.h"
7e4249b9
LP		 44
45static const char *arg_type = NULL;
46static bool arg_all = false;
47static bool arg_replace = false;
48static bool arg_session = false;
49static bool arg_block = false;
e4b61340
LP		 50static bool arg_immediate = false;
51static bool arg_no_wtmp = false;
52static bool arg_no_sync = false;
514f4ef5 53static bool arg_no_wall = false;
e4b61340
LP		 54static bool arg_dry = false;
55static char **arg_wall = NULL;
56enum action {
57 ACTION_INVALID,
58 ACTION_SYSTEMCTL,
59 ACTION_HALT,
60 ACTION_POWEROFF,
61 ACTION_REBOOT,
e4b61340
LP		 62 ACTION_RUNLEVEL2,
63 ACTION_RUNLEVEL3,
64 ACTION_RUNLEVEL4,
65 ACTION_RUNLEVEL5,
66 ACTION_RESCUE,
514f4ef5
LP		 67 ACTION_EMERGENCY,
68 ACTION_DEFAULT,
e4b61340
LP		 69 ACTION_RELOAD,
70 ACTION_REEXEC,
71 ACTION_RUNLEVEL,
72 _ACTION_MAX
73} arg_action = ACTION_SYSTEMCTL;
74
75static bool error_is_no_service(DBusError *error) {
76
514f4ef5
LP		 77 assert(error);
78
e4b61340
LP		 79 if (!dbus_error_is_set(error))
80 return false;
81
82 if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
83 return true;
84
85 if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
86 return true;
87
88 return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
89}
7e4249b9
LP		 90
91static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
92
514f4ef5
LP		 93 assert(iter);
94 assert(data);
95
7e4249b9
LP		 96 if (dbus_message_iter_get_arg_type(iter) != type)
97 return -EIO;
98
99 dbus_message_iter_get_basic(iter, data);
100
101 if (!dbus_message_iter_next(iter) != !next)
102 return -EIO;
103
104 return 0;
105}
106
f1c5860b
LP		 107static int bus_check_peercred(DBusConnection *c) {
108 int fd;
109 struct ucred ucred;
110 socklen_t l;
111
112 assert(c);
113
114 assert_se(dbus_connection_get_unix_fd(c, &fd));
115
116 l = sizeof(struct ucred);
117 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0) {
118 log_error("SO_PEERCRED failed: %m");
119 return -errno;
120 }
121
122 if (l != sizeof(struct ucred)) {
123 log_error("SO_PEERCRED returned wrong size.");
124 return -E2BIG;
125 }
126
127 if (ucred.uid != 0)
128 return -EPERM;
129
130 return 1;
131}
132
7e4249b9
LP		 133static int columns(void) {
134 static int parsed_columns = 0;
135 const char *e;
136
137 if (parsed_columns > 0)
138 return parsed_columns;
139
140 if ((e = getenv("COLUMNS")))
141 parsed_columns = atoi(e);
142
143 if (parsed_columns <= 0) {
144 struct winsize ws;
145 zero(ws);
146
147 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) >= 0)
148 parsed_columns = ws.ws_col;
149 }
150
151 if (parsed_columns <= 0)
152 parsed_columns = 80;
153
154 return parsed_columns;
e4b61340 155
7e4249b9
LP		 156}
157
514f4ef5 158static void warn_wall(enum action action) {
ef2f1067 159 static const char *table[_ACTION_MAX] = {
514f4ef5
LP		 160 [ACTION_HALT] = "The system is going down for system halt NOW!",
161 [ACTION_REBOOT] = "The system is going down for reboot NOW!",
162 [ACTION_POWEROFF] = "The system is going down for power-off NOW!",
163 [ACTION_RESCUE] = "The system is going down to rescue mode NOW!",
164 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
ef2f1067
LP		 165 };
166
514f4ef5
LP		 167 if (arg_no_wall)
168 return;
169
e4a9373f
LP		 170 if (arg_wall) {
171 char *p;
172
173 if (!(p = strv_join(arg_wall, " "))) {
174 log_error("Failed to join strings.");
175 return;
176 }
177
178 if (*p) {
179 utmp_wall(p);
180 free(p);
181 return;
182 }
183
184 free(p);
185 }
186
514f4ef5 187 if (!table[action])
ef2f1067
LP		 188 return;
189
514f4ef5 190 utmp_wall(table[action]);
ef2f1067
LP		 191}
192
7e4249b9
LP		 193static int list_units(DBusConnection *bus, char **args, unsigned n) {
194 DBusMessage *m = NULL, *reply = NULL;
195 DBusError error;
196 int r;
197 DBusMessageIter iter, sub, sub2;
198 unsigned k = 0;
199
200 dbus_error_init(&error);
201
514f4ef5
LP		 202 assert(bus);
203
7e4249b9
LP		 204 if (!(m = dbus_message_new_method_call(
205 "org.freedesktop.systemd1",
206 "/org/freedesktop/systemd1",
207 "org.freedesktop.systemd1.Manager",
208 "ListUnits"))) {
209 log_error("Could not allocate message.");
210 return -ENOMEM;
211 }
212
213 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
214 log_error("Failed to issue method call: %s", error.message);
215 r = -EIO;
216 goto finish;
217 }
218
219 if (!dbus_message_iter_init(reply, &iter) ||
220 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
221 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
222 log_error("Failed to parse reply.");
223 r = -EIO;
224 goto finish;
225 }
226
227 dbus_message_iter_recurse(&iter, &sub);
228
229 printf("%-45s %-6s %-12s %-12s %-15s %s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB", "DESCRIPTION");
230
231 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
232 const char *id, *description, *load_state, *active_state, *sub_state, *unit_state, *job_type, *job_path, *dot;
233 uint32_t job_id;
234
235 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
236 log_error("Failed to parse reply.");
237 r = -EIO;
238 goto finish;
239 }
240
241 dbus_message_iter_recurse(&sub, &sub2);
242
243 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
244 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
245 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
246 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
247 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
248 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_state, true) < 0 ||
249 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &job_id, true) < 0 ||
250 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &job_type, true) < 0 ||
251 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, false) < 0) {
252 log_error("Failed to parse reply.");
253 r = -EIO;
254 goto finish;
255 }
256
257 if ((!arg_type || ((dot = strrchr(id, '.')) &&
258 streq(dot+1, arg_type))) &&
259 (arg_all || !streq(active_state, "inactive"))) {
260
261 int a = 0, b = 0;
262
263 printf("%-45s %-6s %-12s %-12s%n", id, load_state, active_state, sub_state, &a);
264
265 if (job_id != 0)
266 printf(" %-15s%n", job_type, &b);
267 else
268 b = 1 + 15;
269
270 if (a + b + 2 < columns()) {
271 if (job_id == 0)
272 printf(" ");
273
274 printf("%.*s", columns() - a - b - 2, description);
275 }
276
277 fputs("\n", stdout);
278 k++;
279 }
280
281 dbus_message_iter_next(&sub);
282 }
283
284 if (arg_all)
285 printf("\n%u units listed.\n", k);
286 else
287 printf("\n%u live units listed. Pass --all to see dead units, too.\n", k);
288
289 r = 0;
290
291finish:
292 if (m)
293 dbus_message_unref(m);
294
295 if (reply)
296 dbus_message_unref(reply);
297
298 dbus_error_free(&error);
299
300 return r;
301}
302
303static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
304 DBusMessage *m = NULL, *reply = NULL;
305 DBusError error;
306 int r;
307 DBusMessageIter iter, sub, sub2;
308 unsigned k = 0;
309
310 dbus_error_init(&error);
311
514f4ef5
LP		 312 assert(bus);
313
7e4249b9
LP		 314 if (!(m = dbus_message_new_method_call(
315 "org.freedesktop.systemd1",
316 "/org/freedesktop/systemd1",
317 "org.freedesktop.systemd1.Manager",
318 "ListJobs"))) {
319 log_error("Could not allocate message.");
320 return -ENOMEM;
321 }
322
323 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
324 log_error("Failed to issue method call: %s", error.message);
325 r = -EIO;
326 goto finish;
327 }
328
329 if (!dbus_message_iter_init(reply, &iter) ||
330 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
331 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
332 log_error("Failed to parse reply.");
333 r = -EIO;
334 goto finish;
335 }
336
337 dbus_message_iter_recurse(&iter, &sub);
338
339 printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
340
341 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
342 const char *name, *type, *state, *job_path, *unit_path;
343 uint32_t id;
344
345 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
346 log_error("Failed to parse reply.");
347 r = -EIO;
348 goto finish;
349 }
350
351 dbus_message_iter_recurse(&sub, &sub2);
352
353 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
354 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
355 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
356 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
357 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
358 bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
359 log_error("Failed to parse reply.");
360 r = -EIO;
361 goto finish;
362 }
363
364 printf("%4u %-45s %-17s %-7s\n", id, name, type, state);
365 k++;
366
367 dbus_message_iter_next(&sub);
368 }
369
370 printf("\n%u jobs listed.\n", k);
371 r = 0;
372
373finish:
374 if (m)
375 dbus_message_unref(m);
376
377 if (reply)
378 dbus_message_unref(reply);
379
380 dbus_error_free(&error);
381
382 return r;
383}
384
385static int load_unit(DBusConnection *bus, char **args, unsigned n) {
386 DBusMessage *m = NULL, *reply = NULL;
387 DBusError error;
388 int r;
389 unsigned i;
390
391 dbus_error_init(&error);
392
514f4ef5
LP		 393 assert(bus);
394 assert(args);
395
7e4249b9
LP		 396 for (i = 1; i < n; i++) {
397
398 if (!(m = dbus_message_new_method_call(
399 "org.freedesktop.systemd1",
400 "/org/freedesktop/systemd1",
401 "org.freedesktop.systemd1.Manager",
402 "LoadUnit"))) {
403 log_error("Could not allocate message.");
404 r = -ENOMEM;
405 goto finish;
406 }
407
408 if (!dbus_message_append_args(m,
409 DBUS_TYPE_STRING, &args[i],
410 DBUS_TYPE_INVALID)) {
411 log_error("Could not append arguments to message.");
412 r = -ENOMEM;
413 goto finish;
414 }
415
416 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
417 log_error("Failed to issue method call: %s", error.message);
418 r = -EIO;
419 goto finish;
420 }
421
422 dbus_message_unref(m);
423 dbus_message_unref(reply);
424
425 m = reply = NULL;
426 }
427
428 r = 0;
429
430finish:
431 if (m)
432 dbus_message_unref(m);
433
434 if (reply)
435 dbus_message_unref(reply);
436
437 dbus_error_free(&error);
438
439 return r;
440}
441
442static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
443 DBusMessage *m = NULL, *reply = NULL;
444 DBusError error;
445 int r;
446 unsigned i;
447
448 dbus_error_init(&error);
449
514f4ef5
LP		 450 assert(bus);
451 assert(args);
452
7e4249b9
LP		 453 for (i = 1; i < n; i++) {
454 unsigned id;
455 const char *path;
456
457 if (!(m = dbus_message_new_method_call(
458 "org.freedesktop.systemd1",
459 "/org/freedesktop/systemd1",
460 "org.freedesktop.systemd1.Manager",
461 "GetJob"))) {
462 log_error("Could not allocate message.");
463 r = -ENOMEM;
464 goto finish;
465 }
466
467 if ((r = safe_atou(args[i], &id)) < 0) {
468 log_error("Failed to parse job id: %s", strerror(-r));
469 goto finish;
470 }
471
472 assert_cc(sizeof(uint32_t) == sizeof(id));
473 if (!dbus_message_append_args(m,
474 DBUS_TYPE_UINT32, &id,
475 DBUS_TYPE_INVALID)) {
476 log_error("Could not append arguments to message.");
477 r = -ENOMEM;
478 goto finish;
479 }
480
481 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
482 log_error("Failed to issue method call: %s", error.message);
483 r = -EIO;
484 goto finish;
485 }
486
487 if (!dbus_message_get_args(reply, &error,
488 DBUS_TYPE_OBJECT_PATH, &path,
489 DBUS_TYPE_INVALID)) {
490 log_error("Failed to parse reply: %s", error.message);
491 r = -EIO;
492 goto finish;
493 }
494
495 dbus_message_unref(m);
496 if (!(m = dbus_message_new_method_call(
497 "org.freedesktop.systemd1",
498 path,
499 "org.freedesktop.systemd1.Job",
500 "Cancel"))) {
501 log_error("Could not allocate message.");
502 r = -ENOMEM;
503 goto finish;
504 }
505
506 dbus_message_unref(reply);
507 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
508 log_error("Failed to issue method call: %s", error.message);
509 r = -EIO;
510 goto finish;
511 }
512
513 dbus_message_unref(m);
514 dbus_message_unref(reply);
515 m = reply = NULL;
516 }
517
518 r = 0;
519
520finish:
521 if (m)
522 dbus_message_unref(m);
523
524 if (reply)
525 dbus_message_unref(reply);
526
527 dbus_error_free(&error);
528
529 return r;
530}
531
532static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
533 DBusError error;
534 Set *s = data;
535
536 assert(connection);
537 assert(message);
538 assert(s);
539
540 dbus_error_init(&error);
541
542 /* log_debug("Got D-Bus request: %s.%s() on %s", */
543 /* dbus_message_get_interface(message), */
544 /* dbus_message_get_member(message), */
545 /* dbus_message_get_path(message)); */
546
547 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
548 log_error("Warning! D-Bus connection terminated.");
549 dbus_connection_close(connection);
550
551 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
552 uint32_t id;
553 const char *path;
554
555 if (!dbus_message_get_args(message, &error,
556 DBUS_TYPE_UINT32, &id,
557 DBUS_TYPE_OBJECT_PATH, &path,
558 DBUS_TYPE_INVALID))
559 log_error("Failed to parse message: %s", error.message);
560 else {
561 char *p;
562
563 if ((p = set_remove(s, (char*) path)))
564 free(p);
565 }
566 }
567
568 dbus_error_free(&error);
569 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
570}
571
479ef5d3 572static int enable_wait_for_jobs(DBusConnection *bus) {
7e4249b9
LP		 573 DBusError error;
574 DBusMessage *m = NULL, *reply = NULL;
575 int r;
576
577 assert(bus);
7e4249b9
LP		 578
579 dbus_error_init(&error);
580
581 dbus_bus_add_match(bus,
582 "type='signal',"
583 "sender='org.freedesktop.systemd1',"
584 "interface='org.freedesktop.systemd1.Manager',"
585 "member='JobRemoved',"
586 "path='/org/freedesktop/systemd1'",
587 &error);
588
589 if (dbus_error_is_set(&error)) {
590 log_error("Failed to add match: %s", error.message);
591 r = -EIO;
592 goto finish;
593 }
594
7e4249b9
LP		 595 if (!(m = dbus_message_new_method_call(
596 "org.freedesktop.systemd1",
597 "/org/freedesktop/systemd1",
598 "org.freedesktop.systemd1.Manager",
599 "Subscribe"))) {
600 log_error("Could not allocate message.");
601 r = -ENOMEM;
602 goto finish;
603 }
604
605 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
606 log_error("Failed to issue method call: %s", error.message);
607 r = -EIO;
608 goto finish;
609 }
610
7e4249b9
LP		 611 r = 0;
612
613finish:
479ef5d3 614 /* This is slightly dirty, since we don't undo the match registrations. */
7e4249b9
LP		 615
616 if (m)
617 dbus_message_unref(m);
618
619 if (reply)
620 dbus_message_unref(reply);
621
622 dbus_error_free(&error);
623
624 return r;
625}
626
479ef5d3
LP		 627static int wait_for_jobs(DBusConnection *bus, Set *s) {
628 int r;
629
630 assert(bus);
631 assert(s);
632
633 if (!dbus_connection_add_filter(bus, wait_filter, s, NULL)) {
634 log_error("Failed to add filter.");
635 r = -ENOMEM;
636 goto finish;
637 }
638
639 while (!set_isempty(s) &&
640 dbus_connection_read_write_dispatch(bus, -1))
641 ;
642
643 r = 0;
644
645finish:
646 /* This is slightly dirty, since we don't undo the filter registration. */
647
648 return r;
649}
650
e4b61340
LP		 651static int start_unit_one(
652 DBusConnection *bus,
653 const char *method,
654 const char *name,
655 const char *mode,
656 Set *s) {
7e4249b9 657
7e4249b9
LP		 658 DBusMessage *m = NULL, *reply = NULL;
659 DBusError error;
660 int r;
7e4249b9 661
e4b61340
LP		 662 assert(bus);
663 assert(method);
664 assert(name);
665 assert(mode);
666 assert(!arg_block || s);
7e4249b9 667
e4b61340 668 dbus_error_init(&error);
479ef5d3 669
7e4249b9
LP		 670 if (!(m = dbus_message_new_method_call(
671 "org.freedesktop.systemd1",
672 "/org/freedesktop/systemd1",
673 "org.freedesktop.systemd1.Manager",
e4b61340 674 method))) {
7e4249b9
LP		 675 log_error("Could not allocate message.");
676 r = -ENOMEM;
677 goto finish;
678 }
679
680 if (!dbus_message_append_args(m,
e4b61340 681 DBUS_TYPE_STRING, &name,
7e4249b9
LP		 682 DBUS_TYPE_STRING, &mode,
683 DBUS_TYPE_INVALID)) {
684 log_error("Could not append arguments to message.");
685 r = -ENOMEM;
686 goto finish;
687 }
688
689 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
e4b61340
LP		 690
691 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
692 /* There's always a fallback possible for
693 * legacy actions. */
694 r = 0;
695 goto finish;
696 }
697
7e4249b9
LP		 698 log_error("Failed to issue method call: %s", error.message);
699 r = -EIO;
700 goto finish;
701 }
702
703 if (arg_block) {
704 const char *path;
e4b61340 705 char *p;
7e4249b9
LP		 706
707 if (!dbus_message_get_args(reply, &error,
708 DBUS_TYPE_OBJECT_PATH, &path,
709 DBUS_TYPE_INVALID)) {
710 log_error("Failed to parse reply: %s", error.message);
711 r = -EIO;
712 goto finish;
713 }
714
7e4249b9
LP		 715 if (!(p = strdup(path))) {
716 log_error("Failed to duplicate path.");
717 r = -ENOMEM;
718 goto finish;
719 }
720
721 if ((r = set_put(s, p)) < 0) {
e4b61340 722 free(p);
7e4249b9
LP		 723 log_error("Failed to add path to set.");
724 goto finish;
725 }
e4b61340 726 }
7e4249b9 727
e4b61340 728 r = 1;
7e4249b9
LP		 729
730finish:
7e4249b9
LP		 731 if (m)
732 dbus_message_unref(m);
733
734 if (reply)
735 dbus_message_unref(reply);
736
737 dbus_error_free(&error);
738
739 return r;
740}
741
514f4ef5
LP		 742static enum action verb_to_action(const char *verb) {
743 if (streq(verb, "halt"))
744 return ACTION_HALT;
745 else if (streq(verb, "poweroff"))
746 return ACTION_POWEROFF;
747 else if (streq(verb, "reboot"))
748 return ACTION_REBOOT;
749 else if (streq(verb, "rescue"))
750 return ACTION_RESCUE;
751 else if (streq(verb, "emergency"))
752 return ACTION_EMERGENCY;
753 else if (streq(verb, "default"))
754 return ACTION_DEFAULT;
755 else
756 return ACTION_INVALID;
757}
758
e4b61340
LP		 759static int start_unit(DBusConnection *bus, char **args, unsigned n) {
760
761 static const char * const table[_ACTION_MAX] = {
514f4ef5
LP		 762 [ACTION_HALT] = SPECIAL_HALT_TARGET,
763 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
764 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
765 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
766 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
767 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
768 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
769 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
770 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_SERVICE,
771 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET
e4b61340
LP		 772 };
773
774 int r;
775 unsigned i;
514f4ef5 776 const char *method, *mode, *one_name;
e4b61340
LP		 777 Set *s = NULL;
778
514f4ef5
LP		 779 assert(bus);
780
e4b61340
LP		 781 if (arg_action == ACTION_SYSTEMCTL) {
782 method =
e4b61340
LP		 783 streq(args[0], "stop") ? "StopUnit" :
784 streq(args[0], "reload") ? "ReloadUnit" :
785 streq(args[0], "restart") ? "RestartUnit" :
514f4ef5 786 "StartUnit";
e4b61340
LP		 787
788 mode =
514f4ef5
LP		 789 (streq(args[0], "isolate") ||
790 streq(args[0], "rescue") ||
791 streq(args[0], "emergency")) ? "isolate" :
792 arg_replace ? "replace" :
793 "fail";
e4b61340 794
514f4ef5 795 one_name = table[verb_to_action(args[0])];
e4b61340 796
e4b61340
LP		 797 } else {
798 assert(arg_action < ELEMENTSOF(table));
799 assert(table[arg_action]);
800
801 method = "StartUnit";
514f4ef5
LP		 802
803 mode = (arg_action == ACTION_EMERGENCY ||
804 arg_action == ACTION_RESCUE) ? "isolate" : "replace";
805
806 one_name = table[arg_action];
807 }
808
809 if (arg_block) {
810 if ((r = enable_wait_for_jobs(bus)) < 0) {
811 log_error("Could not watch jobs: %s", strerror(-r));
812 goto finish;
813 }
814
815 if (!(s = set_new(string_hash_func, string_compare_func))) {
816 log_error("Failed to allocate set.");
817 r = -ENOMEM;
818 goto finish;
819 }
e4b61340
LP		 820 }
821
822 r = 0;
823
514f4ef5
LP		 824 if (one_name) {
825 if ((r = start_unit_one(bus, method, one_name, mode, s)) <= 0)
826 goto finish;
827 } else {
e4b61340
LP		 828 for (i = 1; i < n; i++)
829 if ((r = start_unit_one(bus, method, args[i], mode, s)) < 0)
830 goto finish;
e4b61340
LP		 831 }
832
514f4ef5
LP		 833 if (arg_block)
834 r = wait_for_jobs(bus, s);
835
e4b61340
LP		 836finish:
837 if (s)
838 set_free_free(s);
839
840 return r;
841}
842
514f4ef5
LP		 843static int start_special(DBusConnection *bus, char **args, unsigned n) {
844 assert(bus);
845 assert(args);
846
847 warn_wall(verb_to_action(args[0]));
848
849 return start_unit(bus, args, n);
850}
851
7e4249b9
LP		 852static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
853 DBusError error;
854 DBusMessage *m = NULL, *reply = NULL;
855
856 assert(connection);
857 assert(message);
858
859 dbus_error_init(&error);
860
861 /* log_debug("Got D-Bus request: %s.%s() on %s", */
862 /* dbus_message_get_interface(message), */
863 /* dbus_message_get_member(message), */
864 /* dbus_message_get_path(message)); */
865
866 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
867 log_error("Warning! D-Bus connection terminated.");
868 dbus_connection_close(connection);
869
870 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
871 dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
872 const char *id, *path;
873
874 if (!dbus_message_get_args(message, &error,
875 DBUS_TYPE_STRING, &id,
876 DBUS_TYPE_OBJECT_PATH, &path,
877 DBUS_TYPE_INVALID))
878 log_error("Failed to parse message: %s", error.message);
879 else if (streq(dbus_message_get_member(message), "UnitNew"))
880 printf("Unit %s added.\n", id);
881 else
882 printf("Unit %s removed.\n", id);
883
884 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
885 dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
886 uint32_t id;
887 const char *path;
888
889 if (!dbus_message_get_args(message, &error,
890 DBUS_TYPE_UINT32, &id,
891 DBUS_TYPE_OBJECT_PATH, &path,
892 DBUS_TYPE_INVALID))
893 log_error("Failed to parse message: %s", error.message);
894 else if (streq(dbus_message_get_member(message), "JobNew"))
895 printf("Job %u added.\n", id);
896 else
897 printf("Job %u removed.\n", id);
898
899
900 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Unit", "Changed") ||
901 dbus_message_is_signal(message, "org.freedesktop.systemd1.Job", "Changed")) {
902
903 const char *path, *interface, *property = "Id";
904 DBusMessageIter iter, sub;
905
906 path = dbus_message_get_path(message);
907 interface = dbus_message_get_interface(message);
908
909 if (!(m = dbus_message_new_method_call(
910 "org.freedesktop.systemd1",
911 path,
912 "org.freedesktop.DBus.Properties",
913 "Get"))) {
914 log_error("Could not allocate message.");
915 goto oom;
916 }
917
918 if (!dbus_message_append_args(m,
919 DBUS_TYPE_STRING, &interface,
920 DBUS_TYPE_STRING, &property,
921 DBUS_TYPE_INVALID)) {
922 log_error("Could not append arguments to message.");
923 goto finish;
924 }
925
926 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
927 log_error("Failed to issue method call: %s", error.message);
928 goto finish;
929 }
930
931 if (!dbus_message_iter_init(reply, &iter) ||
932 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
933 log_error("Failed to parse reply.");
934 goto finish;
935 }
936
937 dbus_message_iter_recurse(&iter, &sub);
938
939 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
940 const char *id;
941
942 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
943 log_error("Failed to parse reply.");
944 goto finish;
945 }
946
947 dbus_message_iter_get_basic(&sub, &id);
948 printf("Unit %s changed.\n", id);
949 } else {
950 uint32_t id;
951
952 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32) {
953 log_error("Failed to parse reply.");
954 goto finish;
955 }
956
957 dbus_message_iter_get_basic(&sub, &id);
958 printf("Job %u changed.\n", id);
959 }
960 }
961
962finish:
963 if (m)
964 dbus_message_unref(m);
965
966 if (reply)
967 dbus_message_unref(reply);
968
969 dbus_error_free(&error);
970 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
971
972oom:
973 if (m)
974 dbus_message_unref(m);
975
976 if (reply)
977 dbus_message_unref(reply);
978
979 dbus_error_free(&error);
980 return DBUS_HANDLER_RESULT_NEED_MEMORY;
981}
982
983static int monitor(DBusConnection *bus, char **args, unsigned n) {
984 DBusMessage *m = NULL, *reply = NULL;
985 DBusError error;
986 int r;
987
988 dbus_error_init(&error);
989
990 dbus_bus_add_match(bus,
991 "type='signal',"
992 "sender='org.freedesktop.systemd1',"
993 "interface='org.freedesktop.systemd1.Manager',"
994 "path='/org/freedesktop/systemd1'",
995 &error);
996
997 if (dbus_error_is_set(&error)) {
998 log_error("Failed to add match: %s", error.message);
999 r = -EIO;
1000 goto finish;
1001 }
1002
1003 dbus_bus_add_match(bus,
1004 "type='signal',"
1005 "sender='org.freedesktop.systemd1',"
1006 "interface='org.freedesktop.systemd1.Unit',"
1007 "member='Changed'",
1008 &error);
1009
1010 if (dbus_error_is_set(&error)) {
1011 log_error("Failed to add match: %s", error.message);
1012 r = -EIO;
1013 goto finish;
1014 }
1015
1016 dbus_bus_add_match(bus,
1017 "type='signal',"
1018 "sender='org.freedesktop.systemd1',"
1019 "interface='org.freedesktop.systemd1.Job',"
1020 "member='Changed'",
1021 &error);
1022
1023 if (dbus_error_is_set(&error)) {
1024 log_error("Failed to add match: %s", error.message);
1025 r = -EIO;
1026 goto finish;
1027 }
1028
1029 if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
1030 log_error("Failed to add filter.");
1031 r = -ENOMEM;
1032 goto finish;
1033 }
1034
1035 if (!(m = dbus_message_new_method_call(
1036 "org.freedesktop.systemd1",
1037 "/org/freedesktop/systemd1",
1038 "org.freedesktop.systemd1.Manager",
1039 "Subscribe"))) {
1040 log_error("Could not allocate message.");
1041 r = -ENOMEM;
1042 goto finish;
1043 }
1044
1045 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1046 log_error("Failed to issue method call: %s", error.message);
1047 r = -EIO;
1048 goto finish;
1049 }
1050
1051 while (dbus_connection_read_write_dispatch(bus, -1))
1052 ;
1053
1054 r = 0;
1055
1056finish:
1057
1058 /* This is slightly dirty, since we don't undo the filter or the matches. */
1059
1060 if (m)
1061 dbus_message_unref(m);
1062
1063 if (reply)
1064 dbus_message_unref(reply);
1065
1066 dbus_error_free(&error);
1067
1068 return r;
1069}
1070
1071static int dump(DBusConnection *bus, char **args, unsigned n) {
1072 DBusMessage *m = NULL, *reply = NULL;
1073 DBusError error;
1074 int r;
1075 const char *text;
1076
1077 dbus_error_init(&error);
1078
1079 if (!(m = dbus_message_new_method_call(
1080 "org.freedesktop.systemd1",
1081 "/org/freedesktop/systemd1",
1082 "org.freedesktop.systemd1.Manager",
1083 "Dump"))) {
1084 log_error("Could not allocate message.");
1085 return -ENOMEM;
1086 }
1087
1088 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1089 log_error("Failed to issue method call: %s", error.message);
1090 r = -EIO;
1091 goto finish;
1092 }
1093
1094 if (!dbus_message_get_args(reply, &error,
1095 DBUS_TYPE_STRING, &text,
1096 DBUS_TYPE_INVALID)) {
1097 log_error("Failed to parse reply: %s", error.message);
1098 r = -EIO;
1099 goto finish;
1100 }
1101
1102 fputs(text, stdout);
1103
1104 r = 0;
1105
1106finish:
1107 if (m)
1108 dbus_message_unref(m);
1109
1110 if (reply)
1111 dbus_message_unref(reply);
1112
1113 dbus_error_free(&error);
1114
1115 return r;
1116}
1117
1118static int snapshot(DBusConnection *bus, char **args, unsigned n) {
1119 DBusMessage *m = NULL, *reply = NULL;
1120 DBusError error;
1121 int r;
1122 const char *name = "", *path, *id;
1123 dbus_bool_t cleanup = FALSE;
1124 DBusMessageIter iter, sub;
1125 const char
1126 *interface = "org.freedesktop.systemd1.Unit",
1127 *property = "Id";
1128
1129 dbus_error_init(&error);
1130
1131 if (!(m = dbus_message_new_method_call(
1132 "org.freedesktop.systemd1",
1133 "/org/freedesktop/systemd1",
1134 "org.freedesktop.systemd1.Manager",
1135 "CreateSnapshot"))) {
1136 log_error("Could not allocate message.");
1137 return -ENOMEM;
1138 }
1139
1140 if (n > 1)
1141 name = args[1];
1142
1143 if (!dbus_message_append_args(m,
1144 DBUS_TYPE_STRING, &name,
1145 DBUS_TYPE_BOOLEAN, &cleanup,
1146 DBUS_TYPE_INVALID)) {
1147 log_error("Could not append arguments to message.");
1148 r = -ENOMEM;
1149 goto finish;
1150 }
1151
1152 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1153 log_error("Failed to issue method call: %s", error.message);
1154 r = -EIO;
1155 goto finish;
1156 }
1157
1158 if (!dbus_message_get_args(reply, &error,
1159 DBUS_TYPE_OBJECT_PATH, &path,
1160 DBUS_TYPE_INVALID)) {
1161 log_error("Failed to parse reply: %s", error.message);
1162 r = -EIO;
1163 goto finish;
1164 }
1165
1166 dbus_message_unref(m);
1167 if (!(m = dbus_message_new_method_call(
1168 "org.freedesktop.systemd1",
1169 path,
1170 "org.freedesktop.DBus.Properties",
1171 "Get"))) {
1172 log_error("Could not allocate message.");
1173 return -ENOMEM;
1174 }
1175
1176 if (!dbus_message_append_args(m,
1177 DBUS_TYPE_STRING, &interface,
1178 DBUS_TYPE_STRING, &property,
1179 DBUS_TYPE_INVALID)) {
1180 log_error("Could not append arguments to message.");
1181 r = -ENOMEM;
1182 goto finish;
1183 }
1184
1185 dbus_message_unref(reply);
1186 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1187 log_error("Failed to issue method call: %s", error.message);
1188 r = -EIO;
1189 goto finish;
1190 }
1191
1192 if (!dbus_message_iter_init(reply, &iter) ||
1193 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
1194 log_error("Failed to parse reply.");
1195 r = -EIO;
1196 goto finish;
1197 }
1198
1199 dbus_message_iter_recurse(&iter, &sub);
1200
1201 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
1202 log_error("Failed to parse reply.");
1203 r = -EIO;
1204 goto finish;
1205 }
1206
1207 dbus_message_iter_get_basic(&sub, &id);
1208 puts(id);
1209 r = 0;
1210
1211finish:
1212 if (m)
1213 dbus_message_unref(m);
1214
1215 if (reply)
1216 dbus_message_unref(reply);
1217
1218 dbus_error_free(&error);
1219
1220 return r;
1221}
1222
1223static int clear_jobs(DBusConnection *bus, char **args, unsigned n) {
1224 DBusMessage *m = NULL, *reply = NULL;
1225 DBusError error;
1226 int r;
1227 const char *method;
1228
1229 dbus_error_init(&error);
1230
e4b61340
LP		 1231 if (arg_action == ACTION_RELOAD)
1232 method = "Reload";
1233 else if (arg_action == ACTION_REEXEC)
1234 method = "Reexecute";
1235 else {
1236 assert(arg_action == ACTION_SYSTEMCTL);
1237
1238 method =
1239 streq(args[0], "clear-jobs") ? "ClearJobs" :
1240 streq(args[0], "daemon-reload") ? "Reload" :
1241 streq(args[0], "daemon-reexec") ? "Reexecute" :
1242 "Exit";
1243 }
7e4249b9
LP		 1244
1245 if (!(m = dbus_message_new_method_call(
1246 "org.freedesktop.systemd1",
1247 "/org/freedesktop/systemd1",
1248 "org.freedesktop.systemd1.Manager",
1249 method))) {
1250 log_error("Could not allocate message.");
1251 return -ENOMEM;
1252 }
1253
1254 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
e4b61340
LP		 1255
1256 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
1257 /* There's always a fallback possible for
1258 * legacy actions. */
1259 r = 0;
1260 goto finish;
1261 }
1262
7e4249b9
LP		 1263 log_error("Failed to issue method call: %s", error.message);
1264 r = -EIO;
1265 goto finish;
1266 }
1267
e4b61340 1268 r = 1;
7e4249b9
LP		 1269
1270finish:
1271 if (m)
1272 dbus_message_unref(m);
1273
1274 if (reply)
1275 dbus_message_unref(reply);
1276
1277 dbus_error_free(&error);
1278
1279 return r;
1280}
1281
1282static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
1283 DBusMessage *m = NULL, *reply = NULL;
1284 DBusError error;
1285 DBusMessageIter iter, sub, sub2;
1286 int r;
1287 const char
1288 *interface = "org.freedesktop.systemd1.Manager",
1289 *property = "Environment";
1290
1291 dbus_error_init(&error);
1292
1293 if (!(m = dbus_message_new_method_call(
1294 "org.freedesktop.systemd1",
1295 "/org/freedesktop/systemd1",
1296 "org.freedesktop.DBus.Properties",
1297 "Get"))) {
1298 log_error("Could not allocate message.");
1299 return -ENOMEM;
1300 }
1301
1302 if (!dbus_message_append_args(m,
1303 DBUS_TYPE_STRING, &interface,
1304 DBUS_TYPE_STRING, &property,
1305 DBUS_TYPE_INVALID)) {
1306 log_error("Could not append arguments to message.");
1307 r = -ENOMEM;
1308 goto finish;
1309 }
1310
1311 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1312 log_error("Failed to issue method call: %s", error.message);
1313 r = -EIO;
1314 goto finish;
1315 }
1316
1317 if (!dbus_message_iter_init(reply, &iter) ||
1318 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
1319 log_error("Failed to parse reply.");
1320 r = -EIO;
1321 goto finish;
1322 }
1323
1324 dbus_message_iter_recurse(&iter, &sub);
1325
1326 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
1327 dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING) {
1328 log_error("Failed to parse reply.");
1329 r = -EIO;
1330 goto finish;
1331 }
1332
1333 dbus_message_iter_recurse(&sub, &sub2);
1334
1335 while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
1336 const char *text;
1337
1338 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
1339 log_error("Failed to parse reply.");
1340 r = -EIO;
1341 goto finish;
1342 }
1343
1344 dbus_message_iter_get_basic(&sub2, &text);
1345 printf("%s\n", text);
1346
1347 dbus_message_iter_next(&sub2);
1348 }
1349
1350 r = 0;
1351
1352finish:
1353 if (m)
1354 dbus_message_unref(m);
1355
1356 if (reply)
1357 dbus_message_unref(reply);
1358
1359 dbus_error_free(&error);
1360
1361 return r;
1362}
1363
1364static int set_environment(DBusConnection *bus, char **args, unsigned n) {
1365 DBusMessage *m = NULL, *reply = NULL;
1366 DBusError error;
1367 int r;
1368 const char *method;
1369 DBusMessageIter iter, sub;
1370 unsigned i;
1371
1372 dbus_error_init(&error);
1373
1374 method = streq(args[0], "set-environment")
1375 ? "SetEnvironment"
1376 : "UnsetEnvironment";
1377
1378 if (!(m = dbus_message_new_method_call(
1379 "org.freedesktop.systemd1",
1380 "/org/freedesktop/systemd1",
1381 "org.freedesktop.systemd1.Manager",
1382 method))) {
1383
1384 log_error("Could not allocate message.");
1385 return -ENOMEM;
1386 }
1387
1388 dbus_message_iter_init_append(m, &iter);
1389
1390 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
1391 log_error("Could not append arguments to message.");
1392 r = -ENOMEM;
1393 goto finish;
1394 }
1395
1396 for (i = 1; i < n; i++)
1397 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) {
1398 log_error("Could not append arguments to message.");
1399 r = -ENOMEM;
1400 goto finish;
1401 }
1402
1403 if (!dbus_message_iter_close_container(&iter, &sub)) {
1404 log_error("Could not append arguments to message.");
1405 r = -ENOMEM;
1406 goto finish;
1407 }
1408
1409 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1410 log_error("Failed to issue method call: %s", error.message);
1411 r = -EIO;
1412 goto finish;
1413 }
1414
1415 r = 0;
1416
1417finish:
1418 if (m)
1419 dbus_message_unref(m);
1420
1421 if (reply)
1422 dbus_message_unref(reply);
1423
1424 dbus_error_free(&error);
1425
1426 return r;
1427}
1428
e4b61340 1429static int systemctl_help(void) {
7e4249b9
LP		 1430
1431 printf("%s [options]\n\n"
514f4ef5 1432 "Send control commands to the init daemon.\n\n"
7e4249b9
LP		 1433 " -h --help Show this help\n"
1434 " -t --type=TYPE List only units of a particular type\n"
1435 " -a --all Show all units, including dead ones\n"
1436 " --replace When installing a new job, replace existing conflicting ones\n"
1437 " --system Connect to system bus\n"
1438 " --session Connect to session bus\n"
514f4ef5
LP		 1439 " --block Wait until operation finished\n"
1440 " --no-wall Don't send wall message before reboot/halt/power-off\n\n"
7e4249b9
LP		 1441 "Commands:\n"
1442 " list-units List units\n"
1443 " list-jobs List jobs\n"
1444 " clear-jobs Cancel all jobs\n"
1445 " load [NAME...] Load one or more units\n"
1446 " cancel [JOB...] Cancel one or more jobs\n"
1447 " start [NAME...] Start one or more units\n"
1448 " stop [NAME...] Stop one or more units\n"
1449 " restart [NAME...] Restart one or more units\n"
1450 " reload [NAME...] Reload one or more units\n"
1451 " isolate [NAME] Start one unit and stop all others\n"
1452 " monitor Monitor unit/job changes\n"
1453 " dump Dump server status\n"
1454 " snapshot [NAME] Create a snapshot\n"
514f4ef5 1455 " daemon-reload Reload init daemon configuration\n"
b1fc29fb 1456 " daemon-reexec Reexecute init daemon\n"
514f4ef5 1457 " daemon-exit Ask the init daemon to quit\n"
7e4249b9
LP		 1458 " show-environment Dump environment\n"
1459 " set-environment [NAME=VALUE...] Set one or more environment variables\n"
514f4ef5
LP		 1460 " unset-environment [NAME...] Unset one or more environment variables\n"
1461 " halt Shut down and halt the system\n"
1462 " reboot Shut down and reboot the system\n"
1463 " poweroff Shut down and power off the system\n"
1464 " default Enter default mode\n"
1465 " rescue Enter rescue mode\n"
1466 " emergency Enter emergency mode\n",
5b6319dc 1467 program_invocation_short_name);
7e4249b9
LP		 1468
1469 return 0;
1470}
1471
e4b61340
LP		 1472static int halt_help(void) {
1473
1474 printf("%s [options]\n\n"
1475 "%s the system.\n\n"
1476 " --help Show this help\n"
1477 " --halt Halt the machine\n"
1478 " -p --poweroff Switch off the machine\n"
1479 " --reboot Reboot the machine\n"
1480 " -f --force Force immediate reboot/halt/power-off\n"
1481 " -w --wtmp-only Don't reboot/halt/power-off, just write wtmp record\n"
1482 " -d --no-wtmp Don't write wtmp record\n"
514f4ef5
LP		 1483 " -n --no-sync Don't sync before reboot/halt/power-off\n"
1484 " --no-wall Don't send wall message before reboot/halt/power-off\n",
e4b61340
LP		 1485 program_invocation_short_name,
1486 arg_action == ACTION_REBOOT ? "Reboot" :
1487 arg_action == ACTION_POWEROFF ? "Power off" :
1488 "Halt");
1489
1490 return 0;
1491}
1492
1493static int shutdown_help(void) {
1494
442b9094 1495 printf("%s [options] [now] [WALL...]\n\n"
e4b61340
LP		 1496 "Shut down the system.\n\n"
1497 " --help Show this help\n"
1498 " -H --halt Halt the machine\n"
1499 " -P --poweroff Power-off the machine\n"
1500 " -r --reboot Reboot the machine\n"
1501 " -h Equivalent to --poweroff, overriden by --halt\n"
514f4ef5
LP		 1502 " -k Don't reboot/halt/power-off, just send warnings\n"
1503 " --no-wall Don't send wall message before reboot/halt/power-off\n",
e4b61340
LP		 1504 program_invocation_short_name);
1505
1506 return 0;
1507}
1508
1509static int telinit_help(void) {
1510
1511 printf("%s [options]\n\n"
514f4ef5
LP		 1512 "Send control commands to the init daemon.\n\n"
1513 " --help Show this help\n"
1514 " --no-wall Don't send wall message before reboot/halt/power-off\n\n"
e4b61340
LP		 1515 "Commands:\n"
1516 " 0 Power-off the machine\n"
1517 " 6 Reboot the machine\n"
514f4ef5
LP		 1518 " 2, 3, 4, 5 Start runlevelX.target unit\n"
1519 " 1, s, S Enter rescue mode\n"
1520 " q, Q Reload init daemon configuration\n"
1521 " u, U Reexecute init daemon\n",
e4b61340
LP		 1522 program_invocation_short_name);
1523
1524 return 0;
1525}
1526
1527static int runlevel_help(void) {
1528
1529 printf("%s [options]\n\n"
1530 "Prints the previous and current runlevel of the init system.\n\n"
1531 " --help Show this help\n",
1532 program_invocation_short_name);
1533
1534 return 0;
1535}
1536
1537static int systemctl_parse_argv(int argc, char *argv[]) {
7e4249b9
LP		 1538
1539 enum {
1540 ARG_REPLACE = 0x100,
1541 ARG_SESSION,
1542 ARG_SYSTEM,
514f4ef5
LP		 1543 ARG_BLOCK,
1544 ARG_NO_WALL
7e4249b9
LP		 1545 };
1546
1547 static const struct option options[] = {
1548 { "help", no_argument, NULL, 'h' },
1549 { "type", required_argument, NULL, 't' },
1550 { "all", no_argument, NULL, 'a' },
1551 { "replace", no_argument, NULL, ARG_REPLACE },
1552 { "session", no_argument, NULL, ARG_SESSION },
1553 { "system", no_argument, NULL, ARG_SYSTEM },
b08a3550 1554 { "block", no_argument, NULL, ARG_BLOCK },
514f4ef5 1555 { "no-wall", no_argument, NULL, ARG_NO_WALL },
b08a3550 1556 { NULL, 0, NULL, 0 }
7e4249b9
LP		 1557 };
1558
1559 int c;
1560
e4b61340 1561 assert(argc >= 0);
7e4249b9
LP		 1562 assert(argv);
1563
1564 while ((c = getopt_long(argc, argv, "hta", options, NULL)) >= 0) {
1565
1566 switch (c) {
1567
1568 case 'h':
e4b61340 1569 systemctl_help();
7e4249b9
LP		 1570 return 0;
1571
1572 case 't':
1573 arg_type = optarg;
1574 break;
1575
1576 case 'a':
1577 arg_all = true;
1578 break;
1579
1580 case ARG_REPLACE:
1581 arg_replace = true;
1582 break;
1583
1584 case ARG_SESSION:
1585 arg_session = true;
1586 break;
1587
1588 case ARG_SYSTEM:
1589 arg_session = false;
1590 break;
1591
1592 case ARG_BLOCK:
1593 arg_block = true;
1594 break;
1595
514f4ef5
LP		 1596 case ARG_NO_WALL:
1597 arg_no_wall = true;
1598 break;
1599
7e4249b9
LP		 1600 case '?':
1601 return -EINVAL;
1602
1603 default:
1604 log_error("Unknown option code %c", c);
1605 return -EINVAL;
1606 }
1607 }
1608
1609 return 1;
1610}
1611
e4b61340
LP		 1612static int halt_parse_argv(int argc, char *argv[]) {
1613
1614 enum {
1615 ARG_HELP = 0x100,
1616 ARG_HALT,
514f4ef5
LP		 1617 ARG_REBOOT,
1618 ARG_NO_WALL
e4b61340
LP		 1619 };
1620
1621 static const struct option options[] = {
1622 { "help", no_argument, NULL, ARG_HELP },
1623 { "halt", no_argument, NULL, ARG_HALT },
1624 { "poweroff", no_argument, NULL, 'p' },
1625 { "reboot", no_argument, NULL, ARG_REBOOT },
1626 { "force", no_argument, NULL, 'f' },
1627 { "wtmp-only", no_argument, NULL, 'w' },
1628 { "no-wtmp", no_argument, NULL, 'd' },
1629 { "no-sync", no_argument, NULL, 'n' },
514f4ef5 1630 { "no-wall", no_argument, NULL, ARG_NO_WALL },
e4b61340
LP		 1631 { NULL, 0, NULL, 0 }
1632 };
1633
1634 int c, runlevel;
1635
1636 assert(argc >= 0);
1637 assert(argv);
1638
1639 if (utmp_get_runlevel(&runlevel, NULL) >= 0)
1640 if (runlevel == '0' || runlevel == '6')
1641 arg_immediate = true;
1642
1643 while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
1644 switch (c) {
1645
1646 case ARG_HELP:
1647 halt_help();
1648 return 0;
1649
1650 case ARG_HALT:
1651 arg_action = ACTION_HALT;
1652 break;
1653
1654 case 'p':
1655 arg_action = ACTION_POWEROFF;
1656 break;
1657
1658 case ARG_REBOOT:
1659 arg_action = ACTION_REBOOT;
1660 break;
1661
1662 case 'f':
1663 arg_immediate = true;
1664 break;
1665
1666 case 'w':
1667 arg_dry = true;
1668 break;
1669
1670 case 'd':
1671 arg_no_wtmp = true;
1672 break;
1673
1674 case 'n':
1675 arg_no_sync = true;
1676 break;
1677
514f4ef5
LP		 1678 case ARG_NO_WALL:
1679 arg_no_wall = true;
1680 break;
1681
e4b61340
LP		 1682 case 'i':
1683 case 'h':
1684 /* Compatibility nops */
1685 break;
1686
1687 case '?':
1688 return -EINVAL;
1689
1690 default:
1691 log_error("Unknown option code %c", c);
1692 return -EINVAL;
1693 }
1694 }
1695
1696 if (optind < argc) {
1697 log_error("Too many arguments.");
1698 return -EINVAL;
1699 }
1700
1701 return 1;
1702}
1703
1704static int shutdown_parse_argv(int argc, char *argv[]) {
1705
1706 enum {
1707 ARG_HELP = 0x100,
514f4ef5 1708 ARG_NO_WALL
e4b61340
LP		 1709 };
1710
1711 static const struct option options[] = {
1712 { "help", no_argument, NULL, ARG_HELP },
1713 { "halt", no_argument, NULL, 'H' },
1714 { "poweroff", no_argument, NULL, 'P' },
1715 { "reboot", no_argument, NULL, 'r' },
514f4ef5 1716 { "no-wall", no_argument, NULL, ARG_NO_WALL },
e4b61340
LP		 1717 { NULL, 0, NULL, 0 }
1718 };
1719
1720 int c;
1721
1722 assert(argc >= 0);
1723 assert(argv);
1724
1725 while ((c = getopt_long(argc, argv, "HPrhkt:a", options, NULL)) >= 0) {
1726 switch (c) {
1727
1728 case ARG_HELP:
1729 shutdown_help();
1730 return 0;
1731
1732 case 'H':
1733 arg_action = ACTION_HALT;
1734 break;
1735
1736 case 'P':
1737 arg_action = ACTION_POWEROFF;
1738 break;
1739
1740 case 'r':
1741 arg_action = ACTION_REBOOT;
1742 break;
1743
1744 case 'h':
1745 if (arg_action != ACTION_HALT)
1746 arg_action = ACTION_POWEROFF;
1747 break;
1748
1749 case 'k':
1750 arg_dry = true;
1751 break;
1752
514f4ef5
LP		 1753 case ARG_NO_WALL:
1754 arg_no_wall = true;
1755 break;
1756
e4b61340
LP		 1757 case 't':
1758 case 'a':
1759 /* Compatibility nops */
1760 break;
1761
1762 case '?':
1763 return -EINVAL;
1764
1765 default:
1766 log_error("Unknown option code %c", c);
1767 return -EINVAL;
1768 }
1769 }
1770
4545812f
LP		 1771 if (argc > optind && !streq(argv[optind], "now"))
1772 log_warning("First argument '%s' isn't 'now'. Ignoring.", argv[optind]);
442b9094 1773
e4b61340
LP		 1774 /* We ignore the time argument */
1775 if (argc > optind + 1)
1776 arg_wall = argv + optind + 1;
1777
1778 optind = argc;
1779
1780 return 1;
e4b61340
LP		 1781}
1782
1783static int telinit_parse_argv(int argc, char *argv[]) {
1784
1785 enum {
1786 ARG_HELP = 0x100,
514f4ef5 1787 ARG_NO_WALL
e4b61340
LP		 1788 };
1789
1790 static const struct option options[] = {
1791 { "help", no_argument, NULL, ARG_HELP },
514f4ef5 1792 { "no-wall", no_argument, NULL, ARG_NO_WALL },
e4b61340
LP		 1793 { NULL, 0, NULL, 0 }
1794 };
1795
1796 static const struct {
1797 char from;
1798 enum action to;
1799 } table[] = {
1800 { '0', ACTION_POWEROFF },
1801 { '6', ACTION_REBOOT },
ef2f1067 1802 { '1', ACTION_RESCUE },
e4b61340
LP		 1803 { '2', ACTION_RUNLEVEL2 },
1804 { '3', ACTION_RUNLEVEL3 },
1805 { '4', ACTION_RUNLEVEL4 },
1806 { '5', ACTION_RUNLEVEL5 },
1807 { 's', ACTION_RESCUE },
1808 { 'S', ACTION_RESCUE },
1809 { 'q', ACTION_RELOAD },
1810 { 'Q', ACTION_RELOAD },
1811 { 'u', ACTION_REEXEC },
1812 { 'U', ACTION_REEXEC }
1813 };
1814
1815 unsigned i;
1816 int c;
1817
1818 assert(argc >= 0);
1819 assert(argv);
1820
1821 while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
1822 switch (c) {
1823
1824 case ARG_HELP:
1825 telinit_help();
1826 return 0;
1827
514f4ef5
LP		 1828 case ARG_NO_WALL:
1829 arg_no_wall = true;
1830 break;
1831
e4b61340
LP		 1832 case '?':
1833 return -EINVAL;
1834
1835 default:
1836 log_error("Unknown option code %c", c);
1837 return -EINVAL;
1838 }
1839 }
1840
1841 if (optind >= argc) {
1842 log_error("Argument missing.");
1843 return -EINVAL;
1844 }
1845
1846 if (optind + 1 < argc) {
1847 log_error("Too many arguments.");
1848 return -EINVAL;
1849 }
1850
1851 if (strlen(argv[optind]) != 1) {
1852 log_error("Expected single character argument.");
1853 return -EINVAL;
1854 }
1855
1856 for (i = 0; i < ELEMENTSOF(table); i++)
1857 if (table[i].from == argv[optind][0])
1858 break;
1859
1860 if (i >= ELEMENTSOF(table)) {
1861 log_error("Unknown command %s.", argv[optind]);
1862 return -EINVAL;
1863 }
1864
1865 arg_action = table[i].to;
1866
1867 optind ++;
1868
1869 return 1;
1870}
1871
1872static int runlevel_parse_argv(int argc, char *argv[]) {
1873
1874 enum {
1875 ARG_HELP = 0x100,
1876 };
1877
1878 static const struct option options[] = {
1879 { "help", no_argument, NULL, ARG_HELP },
1880 { NULL, 0, NULL, 0 }
1881 };
1882
1883 int c;
1884
1885 assert(argc >= 0);
1886 assert(argv);
1887
1888 while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
1889 switch (c) {
1890
1891 case ARG_HELP:
1892 runlevel_help();
1893 return 0;
1894
1895 case '?':
1896 return -EINVAL;
1897
1898 default:
1899 log_error("Unknown option code %c", c);
1900 return -EINVAL;
1901 }
1902 }
1903
1904 if (optind < argc) {
1905 log_error("Too many arguments.");
1906 return -EINVAL;
1907 }
1908
1909 return 1;
1910}
1911
1912static int parse_argv(int argc, char *argv[]) {
1913 assert(argc >= 0);
1914 assert(argv);
1915
1916 if (program_invocation_short_name) {
1917
1918 if (strstr(program_invocation_short_name, "halt")) {
1919 arg_action = ACTION_HALT;
1920 return halt_parse_argv(argc, argv);
1921 } else if (strstr(program_invocation_short_name, "poweroff")) {
1922 arg_action = ACTION_POWEROFF;
1923 return halt_parse_argv(argc, argv);
1924 } else if (strstr(program_invocation_short_name, "reboot")) {
1925 arg_action = ACTION_REBOOT;
1926 return halt_parse_argv(argc, argv);
1927 } else if (strstr(program_invocation_short_name, "shutdown")) {
1928 arg_action = ACTION_POWEROFF;
1929 return shutdown_parse_argv(argc, argv);
1930 } else if (strstr(program_invocation_short_name, "init")) {
1931 arg_action = ACTION_INVALID;
1932 return telinit_parse_argv(argc, argv);
1933 } else if (strstr(program_invocation_short_name, "runlevel")) {
1934 arg_action = ACTION_RUNLEVEL;
1935 return runlevel_parse_argv(argc, argv);
1936 }
1937 }
1938
1939 arg_action = ACTION_SYSTEMCTL;
1940 return systemctl_parse_argv(argc, argv);
1941}
1942
d55ae9e6 1943static int action_to_runlevel(void) {
eb22ac37
LP		 1944
1945 static const char table[_ACTION_MAX] = {
1946 [ACTION_HALT] = '0',
1947 [ACTION_POWEROFF] = '0',
1948 [ACTION_REBOOT] = '6',
1949 [ACTION_RUNLEVEL2] = '2',
1950 [ACTION_RUNLEVEL3] = '3',
1951 [ACTION_RUNLEVEL4] = '4',
1952 [ACTION_RUNLEVEL5] = '5',
1953 [ACTION_RESCUE] = '1'
1954 };
1955
d55ae9e6
LP		 1956 assert(arg_action < _ACTION_MAX);
1957
1958 return table[arg_action];
1959}
1960
f1c5860b 1961static int talk_upstart(void) {
d55ae9e6
LP		 1962 DBusMessage *m = NULL, *reply = NULL;
1963 DBusError error;
1964 int previous, rl, r;
1965 char
1966 env1_buf[] = "RUNLEVEL=X",
1967 env2_buf[] = "PREVLEVEL=X";
1968 char *env1 = env1_buf, *env2 = env2_buf;
1969 const char *emit = "runlevel";
1970 dbus_bool_t b_false = FALSE;
1971 DBusMessageIter iter, sub;
f1c5860b 1972 DBusConnection *bus;
d55ae9e6
LP		 1973
1974 dbus_error_init(&error);
1975
1976 if (!(rl = action_to_runlevel()))
1977 return 0;
1978
1979 if (utmp_get_runlevel(&previous, NULL) < 0)
1980 previous = 'N';
1981
f1c5860b
LP		 1982 if (!(bus = dbus_connection_open("unix:abstract=/com/ubuntu/upstart", &error))) {
1983 if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
1984 r = 0;
1985 goto finish;
1986 }
1987
1988 log_error("Failed to connect to Upstart bus: %s", error.message);
1989 r = -EIO;
1990 goto finish;
1991 }
1992
1993 if ((r = bus_check_peercred(bus)) < 0) {
1994 log_error("Failed to verify owner of bus.");
1995 goto finish;
1996 }
1997
d55ae9e6
LP		 1998 if (!(m = dbus_message_new_method_call(
1999 "com.ubuntu.Upstart",
2000 "/com/ubuntu/Upstart",
2001 "com.ubuntu.Upstart0_6",
2002 "EmitEvent"))) {
2003
2004 log_error("Could not allocate message.");
f1c5860b
LP		 2005 r = -ENOMEM;
2006 goto finish;
d55ae9e6
LP		 2007 }
2008
2009 dbus_message_iter_init_append(m, &iter);
2010
2011 env1_buf[sizeof(env1_buf)-2] = rl;
2012 env2_buf[sizeof(env2_buf)-2] = previous;
2013
2014 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
2015 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
2016 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
2017 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
2018 !dbus_message_iter_close_container(&iter, &sub) ||
2019 !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
2020 log_error("Could not append arguments to message.");
2021 r = -ENOMEM;
2022 goto finish;
2023 }
2024
2025 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2026
2027 if (error_is_no_service(&error)) {
2028 r = 0;
2029 goto finish;
2030 }
2031
2032 log_error("Failed to issue method call: %s", error.message);
2033 r = -EIO;
2034 goto finish;
2035 }
2036
2037 r = 1;
2038
2039finish:
2040 if (m)
2041 dbus_message_unref(m);
2042
2043 if (reply)
2044 dbus_message_unref(reply);
2045
f1c5860b
LP		 2046 if (bus)
2047 dbus_connection_unref(bus);
2048
d55ae9e6
LP		 2049 dbus_error_free(&error);
2050
2051 return r;
2052}
2053
2054static int talk_initctl(void) {
eb22ac37
LP		 2055 struct init_request request;
2056 int r, fd;
d55ae9e6 2057 char rl;
eb22ac37 2058
d55ae9e6 2059 if (!(rl = action_to_runlevel()))
eb22ac37
LP		 2060 return 0;
2061
2062 zero(request);
2063 request.magic = INIT_MAGIC;
2064 request.sleeptime = 0;
2065 request.cmd = INIT_CMD_RUNLVL;
d55ae9e6
LP		 2066 request.runlevel = rl;
2067
2068 if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
2069
2070 if (errno == ENOENT)
2071 return 0;
eb22ac37 2072
d55ae9e6 2073 log_error("Failed to open "INIT_FIFO": %m");
eb22ac37 2074 return -errno;
d55ae9e6 2075 }
eb22ac37 2076
d55ae9e6 2077 errno = 0;
eb22ac37
LP		 2078 r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
2079 close_nointr_nofail(fd);
2080
d55ae9e6
LP		 2081 if (r < 0) {
2082 log_error("Failed to write to "INIT_FIFO": %m");
eb22ac37 2083 return errno ? -errno : -EIO;
d55ae9e6 2084 }
eb22ac37
LP		 2085
2086 return 1;
e4b61340
LP		 2087}
2088
2089static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
7e4249b9 2090
7e4249b9
LP		 2091 static const struct {
2092 const char* verb;
2093 const enum {
2094 MORE,
2095 LESS,
2096 EQUAL
2097 } argc_cmp;
2098 const int argc;
2099 int (* const dispatch)(DBusConnection *bus, char **args, unsigned n);
2100 } verbs[] = {
2101 { "list-units", LESS, 1, list_units },
2102 { "list-jobs", EQUAL, 1, list_jobs },
2103 { "clear-jobs", EQUAL, 1, clear_jobs },
2104 { "load", MORE, 2, load_unit },
2105 { "cancel", MORE, 2, cancel_job },
2106 { "start", MORE, 2, start_unit },
2107 { "stop", MORE, 2, start_unit },
2108 { "reload", MORE, 2, start_unit },
2109 { "restart", MORE, 2, start_unit },
e4b61340 2110 { "isolate", EQUAL, 2, start_unit },
7e4249b9
LP		 2111 { "monitor", EQUAL, 1, monitor },
2112 { "dump", EQUAL, 1, dump },
2113 { "snapshot", LESS, 2, snapshot },
2114 { "daemon-reload", EQUAL, 1, clear_jobs },
2115 { "daemon-reexec", EQUAL, 1, clear_jobs },
2116 { "daemon-exit", EQUAL, 1, clear_jobs },
2117 { "show-environment", EQUAL, 1, show_enviroment },
2118 { "set-environment", MORE, 2, set_environment },
2119 { "unset-environment", MORE, 2, set_environment },
514f4ef5
LP		 2120 { "halt", EQUAL, 1, start_special },
2121 { "poweroff", EQUAL, 1, start_special },
2122 { "reboot", EQUAL, 1, start_special },
2123 { "default", EQUAL, 1, start_special },
2124 { "rescue", EQUAL, 1, start_special },
2125 { "emergency", EQUAL, 1, start_special },
7e4249b9
LP		 2126 };
2127
e4b61340 2128 int left;
7e4249b9 2129 unsigned i;
7e4249b9 2130
e4b61340
LP		 2131 assert(bus);
2132 assert(argc >= 0);
2133 assert(argv);
7e4249b9
LP		 2134
2135 left = argc - optind;
2136
2137 if (left <= 0)
2138 /* Special rule: no arguments means "list-units" */
2139 i = 0;
2140 else {
2141 for (i = 0; i < ELEMENTSOF(verbs); i++)
2142 if (streq(argv[optind], verbs[i].verb))
2143 break;
2144
2145 if (i >= ELEMENTSOF(verbs)) {
2146 log_error("Unknown operation %s", argv[optind]);
e4b61340 2147 return -EINVAL;
7e4249b9
LP		 2148 }
2149 }
2150
2151 switch (verbs[i].argc_cmp) {
2152
2153 case EQUAL:
2154 if (left != verbs[i].argc) {
2155 log_error("Invalid number of arguments.");
e4b61340 2156 return -EINVAL;
7e4249b9
LP		 2157 }
2158
2159 break;
2160
2161 case MORE:
2162 if (left < verbs[i].argc) {
2163 log_error("Too few arguments.");
e4b61340 2164 return -EINVAL;
7e4249b9
LP		 2165 }
2166
2167 break;
2168
2169 case LESS:
2170 if (left > verbs[i].argc) {
2171 log_error("Too many arguments.");
e4b61340 2172 return -EINVAL;
7e4249b9
LP		 2173 }
2174
2175 break;
2176
2177 default:
2178 assert_not_reached("Unknown comparison operator.");
2179 }
2180
e4b61340
LP		 2181 return verbs[i].dispatch(bus, argv + optind, left);
2182}
2183
2184static int reload_with_fallback(DBusConnection *bus) {
2185 int r;
2186
2187 if (bus) {
2188 /* First, try systemd via D-Bus. */
2189 if ((r = clear_jobs(bus, NULL, 0)) > 0)
2190 return 0;
2191 }
2192
2193 /* Nothing else worked, so let's try signals */
2194 assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
2195
2196 if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
2197 log_error("kill() failed: %m");
2198 return -errno;
2199 }
2200
2201 return 0;
2202}
2203
2204static int start_with_fallback(DBusConnection *bus) {
2205 int r;
2206
514f4ef5 2207 warn_wall(arg_action);
ef2f1067 2208
e4b61340
LP		 2209 if (bus) {
2210 /* First, try systemd via D-Bus. */
2211 if ((r = start_unit(bus, NULL, 0)) > 0)
2212 return 0;
2213
2214 /* Hmm, talking to systemd via D-Bus didn't work. Then
2215 * let's try to talk to Upstart via D-Bus. */
f1c5860b 2216 if ((r = talk_upstart()) > 0)
e4b61340
LP		 2217 return 0;
2218 }
2219
2220 /* Nothing else worked, so let's try
2221 * /dev/initctl */
d55ae9e6
LP		 2222 if ((r = talk_initctl()) != 0)
2223 return 0;
2224
2225 log_error("Failed to talk to init daemon.");
2226 return -EIO;
e4b61340
LP		 2227}
2228
2229static int halt_main(DBusConnection *bus) {
2230 int r;
2231
2232 if (!arg_immediate)
2233 return start_with_fallback(bus);
2234
2235 if (!arg_no_wtmp)
2236 if ((r = utmp_put_shutdown(0)) < 0)
2237 log_warning("Failed to write utmp record: %s", strerror(-r));
2238
2239 if (!arg_no_sync)
2240 sync();
2241
2242 if (arg_dry)
2243 return 0;
2244
2245 /* Make sure C-A-D is handled by the kernel from this
2246 * point on... */
2247 reboot(RB_ENABLE_CAD);
2248
2249 switch (arg_action) {
2250
2251 case ACTION_HALT:
2252 log_info("Halting");
2253 reboot(RB_HALT_SYSTEM);
2254 break;
2255
2256 case ACTION_POWEROFF:
2257 log_info("Powering off");
2258 reboot(RB_POWER_OFF);
2259 break;
2260
2261 case ACTION_REBOOT:
2262 log_info("Rebooting");
2263 reboot(RB_AUTOBOOT);
2264 break;
2265
2266 default:
2267 assert_not_reached("Unknown halt action.");
2268 }
2269
2270 /* We should never reach this. */
2271 return -ENOSYS;
2272}
2273
2274static int runlevel_main(void) {
2275 int r, runlevel, previous;
2276
2277 if ((r = utmp_get_runlevel(&runlevel, &previous)) < 0) {
2278 printf("unknown");
2279 return r;
2280 }
2281
2282 printf("%c %c\n",
2283 previous <= 0 ? 'N' : previous,
2284 runlevel <= 0 ? 'N' : runlevel);
2285
2286 return 0;
2287}
2288
2289int main(int argc, char*argv[]) {
2290 int r, retval = 1;
2291 DBusConnection *bus = NULL;
2292 DBusError error;
2293
2294 dbus_error_init(&error);
2295
2296 log_parse_environment();
2297
2298 if ((r = parse_argv(argc, argv)) < 0)
2299 goto finish;
2300 else if (r == 0) {
2301 retval = 0;
7e4249b9
LP		 2302 goto finish;
2303 }
2304
e4b61340
LP		 2305 /* /sbin/runlevel doesn't need to communicate via D-Bus, so
2306 * let's shortcut this */
2307 if (arg_action == ACTION_RUNLEVEL) {
2308 retval = runlevel_main() < 0;
2309 goto finish;
2310 }
2311
5e8d1c9a 2312 /* If we are root, then let's not go via the bus */
f1c5860b 2313 if (geteuid() == 0 && !arg_session) {
5e8d1c9a 2314 bus = dbus_connection_open("unix:abstract=/org/freedesktop/systemd1/private", &error);
f1c5860b
LP		 2315
2316 if (bus && bus_check_peercred(bus) < 0) {
2317 log_error("Failed to verify owner of bus.");
2318 goto finish;
2319 }
2320 } else
5e8d1c9a
LP		 2321 bus = dbus_bus_get(arg_session ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error);
2322
2323 if (bus)
e4b61340
LP		 2324 dbus_connection_set_exit_on_disconnect(bus, FALSE);
2325
2326 switch (arg_action) {
2327
2328 case ACTION_SYSTEMCTL: {
2329
2330 if (!bus) {
2331 log_error("Failed to get D-Bus connection: %s", error.message);
2332 goto finish;
2333 }
2334
2335 retval = systemctl_main(bus, argc, argv) < 0;
2336 break;
2337 }
2338
2339 case ACTION_HALT:
2340 case ACTION_POWEROFF:
2341 case ACTION_REBOOT:
2342 retval = halt_main(bus) < 0;
2343 break;
2344
e4b61340
LP		 2345 case ACTION_RUNLEVEL2:
2346 case ACTION_RUNLEVEL3:
2347 case ACTION_RUNLEVEL4:
2348 case ACTION_RUNLEVEL5:
2349 case ACTION_RESCUE:
514f4ef5 2350 case ACTION_EMERGENCY:
eb22ac37 2351 case ACTION_DEFAULT:
e4b61340
LP		 2352 retval = start_with_fallback(bus) < 0;
2353 break;
7e4249b9 2354
e4b61340
LP		 2355 case ACTION_RELOAD:
2356 case ACTION_REEXEC:
2357 retval = reload_with_fallback(bus) < 0;
2358 break;
2359
eb22ac37
LP		 2360 case ACTION_INVALID:
2361 case ACTION_RUNLEVEL:
e4b61340
LP		 2362 default:
2363 assert_not_reached("Unknown action");
2364 }
7e4249b9
LP		 2365
2366finish:
2367
2368 if (bus)
2369 dbus_connection_unref(bus);
2370
e4b61340
LP		 2371 dbus_error_free(&error);
2372
7e4249b9
LP		 2373 dbus_shutdown();
2374
2375 return retval;
2376}
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