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