chiark / gitweb /
clang: fix numerous little issues found with clang-analyzer
[elogind.git] / src / systemctl.c
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
22 #include <sys/reboot.h>
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 #include <fcntl.h>
32 #include <sys/socket.h>
33 #include <sys/stat.h>
34
35 #include <dbus/dbus.h>
36
37 #include "log.h"
38 #include "util.h"
39 #include "macro.h"
40 #include "set.h"
41 #include "utmp-wtmp.h"
42 #include "special.h"
43 #include "initreq.h"
44 #include "strv.h"
45 #include "dbus-common.h"
46 #include "cgroup-show.h"
47 #include "cgroup-util.h"
48 #include "list.h"
49 #include "path-lookup.h"
50 #include "conf-parser.h"
51 #include "sd-daemon.h"
52
53 static const char *arg_type = NULL;
54 static char **arg_property = NULL;
55 static bool arg_all = false;
56 static bool arg_fail = false;
57 static bool arg_session = false;
58 static bool arg_global = false;
59 static bool arg_immediate = false;
60 static bool arg_no_block = false;
61 static bool arg_no_wtmp = false;
62 static bool arg_no_sync = false;
63 static bool arg_no_wall = false;
64 static bool arg_no_reload = false;
65 static bool arg_dry = false;
66 static bool arg_quiet = false;
67 static bool arg_full = false;
68 static bool arg_force = false;
69 static bool arg_defaults = false;
70 static char **arg_wall = NULL;
71 static enum action {
72         ACTION_INVALID,
73         ACTION_SYSTEMCTL,
74         ACTION_HALT,
75         ACTION_POWEROFF,
76         ACTION_REBOOT,
77         ACTION_RUNLEVEL2,
78         ACTION_RUNLEVEL3,
79         ACTION_RUNLEVEL4,
80         ACTION_RUNLEVEL5,
81         ACTION_RESCUE,
82         ACTION_EMERGENCY,
83         ACTION_DEFAULT,
84         ACTION_RELOAD,
85         ACTION_REEXEC,
86         ACTION_RUNLEVEL,
87         _ACTION_MAX
88 } arg_action = ACTION_SYSTEMCTL;
89 static enum dot {
90         DOT_ALL,
91         DOT_ORDER,
92         DOT_REQUIRE
93 } arg_dot = DOT_ALL;
94
95 static bool private_bus = false;
96
97 static int daemon_reload(DBusConnection *bus, char **args, unsigned n);
98
99 static bool on_tty(void) {
100         static int t = -1;
101
102         if (_unlikely_(t < 0))
103                 t = isatty(STDOUT_FILENO) > 0;
104
105         return t;
106 }
107
108 static const char *ansi_highlight(bool b) {
109
110         if (!on_tty())
111                 return "";
112
113         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
114 }
115
116 static const char *ansi_highlight_green(bool b) {
117
118         if (!on_tty())
119                 return "";
120
121         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
122 }
123
124 static bool error_is_no_service(DBusError *error) {
125
126         assert(error);
127
128         if (!dbus_error_is_set(error))
129                 return false;
130
131         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
132                 return true;
133
134         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
135                 return true;
136
137         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
138 }
139
140 static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
141
142         assert(iter);
143         assert(data);
144
145         if (dbus_message_iter_get_arg_type(iter) != type)
146                 return -EIO;
147
148         dbus_message_iter_get_basic(iter, data);
149
150         if (!dbus_message_iter_next(iter) != !next)
151                 return -EIO;
152
153         return 0;
154 }
155
156 static void warn_wall(enum action action) {
157         static const char *table[_ACTION_MAX] = {
158                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
159                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
160                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
161                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
162                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
163         };
164
165         if (arg_no_wall)
166                 return;
167
168         if (arg_wall) {
169                 char *p;
170
171                 if (!(p = strv_join(arg_wall, " "))) {
172                         log_error("Failed to join strings.");
173                         return;
174                 }
175
176                 if (*p) {
177                         utmp_wall(p);
178                         free(p);
179                         return;
180                 }
181
182                 free(p);
183         }
184
185         if (!table[action])
186                 return;
187
188         utmp_wall(table[action]);
189 }
190
191 static int list_units(DBusConnection *bus, char **args, unsigned n) {
192         DBusMessage *m = NULL, *reply = NULL;
193         DBusError error;
194         int r;
195         DBusMessageIter iter, sub, sub2;
196         unsigned k = 0;
197
198         dbus_error_init(&error);
199
200         assert(bus);
201
202         if (!(m = dbus_message_new_method_call(
203                               "org.freedesktop.systemd1",
204                               "/org/freedesktop/systemd1",
205                               "org.freedesktop.systemd1.Manager",
206                               "ListUnits"))) {
207                 log_error("Could not allocate message.");
208                 return -ENOMEM;
209         }
210
211         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
212                 log_error("Failed to issue method call: %s", error.message);
213                 r = -EIO;
214                 goto finish;
215         }
216
217         if (!dbus_message_iter_init(reply, &iter) ||
218             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
219             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
220                 log_error("Failed to parse reply.");
221                 r = -EIO;
222                 goto finish;
223         }
224
225         dbus_message_iter_recurse(&iter, &sub);
226
227         if (isatty(STDOUT_FILENO))
228                 printf("%-45s %-6s %-12s %-12s %-15s %s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB", "DESCRIPTION");
229
230         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
231                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path, *job_type, *job_path, *dot;
232                 uint32_t job_id;
233
234                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
235                         log_error("Failed to parse reply.");
236                         r = -EIO;
237                         goto finish;
238                 }
239
240                 dbus_message_iter_recurse(&sub, &sub2);
241
242                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
243                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
244                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
245                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
246                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
247                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
248                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, 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") || following[0]) || job_id > 0)) {
260                         char *e;
261                         int a = 0, b = 0;
262                         const char *on, *off;
263
264                         if (streq(active_state, "maintenance")) {
265                                 on = ansi_highlight(true);
266                                 off = ansi_highlight(false);
267                         } else
268                                 on = off = "";
269
270                         e = arg_full ? NULL : ellipsize(id, 45, 33);
271                         printf("%-45s %-6s %s%-12s %-12s%s%n", e ? e : id, load_state, on, active_state, sub_state, off, &a);
272                         free(e);
273
274                         a -= strlen(on) + strlen(off);
275
276                         if (job_id != 0)
277                                 printf(" => %-12s%n", job_type, &b);
278                         else
279                                 b = 1 + 15;
280
281                         if (a + b + 2 < columns()) {
282                                 if (job_id == 0)
283                                         printf("                ");
284
285                                 printf(" %.*s", columns() - a - b - 2, description);
286                         }
287
288                         fputs("\n", stdout);
289                         k++;
290                 }
291
292                 dbus_message_iter_next(&sub);
293         }
294
295         if (isatty(STDOUT_FILENO)) {
296
297                 printf("\nLOAD   = Load State, reflects whether the unit configuration was properly loaded.\n"
298                        "ACTIVE = Active State, the high-level unit activation state, i.e. generalization of the substate.\n"
299                        "SUB    = Substate, the low-level unit activation state, possible values depend on unit type.\n"
300                        "JOB    = Job, shows pending jobs for the unit.\n");
301
302                 if (arg_all)
303                         printf("\n%u units listed.\n", k);
304                 else
305                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", k);
306         }
307
308         r = 0;
309
310 finish:
311         if (m)
312                 dbus_message_unref(m);
313
314         if (reply)
315                 dbus_message_unref(reply);
316
317         dbus_error_free(&error);
318
319         return r;
320 }
321
322 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
323         static const char * const colors[] = {
324                 "Requires",              "[color=\"black\"]",
325                 "RequiresOverridable",   "[color=\"black\"]",
326                 "Requisite",             "[color=\"darkblue\"]",
327                 "RequisiteOverridable",  "[color=\"darkblue\"]",
328                 "Wants",                 "[color=\"darkgrey\"]",
329                 "Conflicts",             "[color=\"red\"]",
330                 "ConflictedBy",          "[color=\"red\"]",
331                 "After",                 "[color=\"green\"]"
332         };
333
334         const char *c = NULL;
335         unsigned i;
336
337         assert(name);
338         assert(prop);
339         assert(iter);
340
341         for (i = 0; i < ELEMENTSOF(colors); i += 2)
342                 if (streq(colors[i], prop)) {
343                         c = colors[i+1];
344                         break;
345                 }
346
347         if (!c)
348                 return 0;
349
350         if (arg_dot != DOT_ALL)
351                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
352                         return 0;
353
354         switch (dbus_message_iter_get_arg_type(iter)) {
355
356         case DBUS_TYPE_ARRAY:
357
358                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
359                         DBusMessageIter sub;
360
361                         dbus_message_iter_recurse(iter, &sub);
362
363                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
364                                 const char *s;
365
366                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
367                                 dbus_message_iter_get_basic(&sub, &s);
368                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
369
370                                 dbus_message_iter_next(&sub);
371                         }
372
373                         return 0;
374                 }
375         }
376
377         return 0;
378 }
379
380 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
381         DBusMessage *m = NULL, *reply = NULL;
382         const char *interface = "org.freedesktop.systemd1.Unit";
383         int r;
384         DBusError error;
385         DBusMessageIter iter, sub, sub2, sub3;
386
387         assert(bus);
388         assert(path);
389
390         dbus_error_init(&error);
391
392         if (!(m = dbus_message_new_method_call(
393                               "org.freedesktop.systemd1",
394                               path,
395                               "org.freedesktop.DBus.Properties",
396                               "GetAll"))) {
397                 log_error("Could not allocate message.");
398                 r = -ENOMEM;
399                 goto finish;
400         }
401
402         if (!dbus_message_append_args(m,
403                                       DBUS_TYPE_STRING, &interface,
404                                       DBUS_TYPE_INVALID)) {
405                 log_error("Could not append arguments to message.");
406                 r = -ENOMEM;
407                 goto finish;
408         }
409
410         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
411                 log_error("Failed to issue method call: %s", error.message);
412                 r = -EIO;
413                 goto finish;
414         }
415
416         if (!dbus_message_iter_init(reply, &iter) ||
417             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
418             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
419                 log_error("Failed to parse reply.");
420                 r = -EIO;
421                 goto finish;
422         }
423
424         dbus_message_iter_recurse(&iter, &sub);
425
426         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
427                 const char *prop;
428
429                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
430                         log_error("Failed to parse reply.");
431                         r = -EIO;
432                         goto finish;
433                 }
434
435                 dbus_message_iter_recurse(&sub, &sub2);
436
437                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
438                         log_error("Failed to parse reply.");
439                         r = -EIO;
440                         goto finish;
441                 }
442
443                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
444                         log_error("Failed to parse reply.");
445                         r = -EIO;
446                         goto finish;
447                 }
448
449                 dbus_message_iter_recurse(&sub2, &sub3);
450
451                 if (dot_one_property(name, prop, &sub3)) {
452                         log_error("Failed to parse reply.");
453                         r = -EIO;
454                         goto finish;
455                 }
456
457                 dbus_message_iter_next(&sub);
458         }
459
460         r = 0;
461
462 finish:
463         if (m)
464                 dbus_message_unref(m);
465
466         if (reply)
467                 dbus_message_unref(reply);
468
469         dbus_error_free(&error);
470
471         return r;
472 }
473
474 static int dot(DBusConnection *bus, char **args, unsigned n) {
475         DBusMessage *m = NULL, *reply = NULL;
476         DBusError error;
477         int r;
478         DBusMessageIter iter, sub, sub2;
479
480         dbus_error_init(&error);
481
482         assert(bus);
483
484         if (!(m = dbus_message_new_method_call(
485                               "org.freedesktop.systemd1",
486                               "/org/freedesktop/systemd1",
487                               "org.freedesktop.systemd1.Manager",
488                               "ListUnits"))) {
489                 log_error("Could not allocate message.");
490                 return -ENOMEM;
491         }
492
493         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
494                 log_error("Failed to issue method call: %s", error.message);
495                 r = -EIO;
496                 goto finish;
497         }
498
499         if (!dbus_message_iter_init(reply, &iter) ||
500             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
501             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
502                 log_error("Failed to parse reply.");
503                 r = -EIO;
504                 goto finish;
505         }
506
507         printf("digraph systemd {\n");
508
509         dbus_message_iter_recurse(&iter, &sub);
510         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
511                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
512
513                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
514                         log_error("Failed to parse reply.");
515                         r = -EIO;
516                         goto finish;
517                 }
518
519                 dbus_message_iter_recurse(&sub, &sub2);
520
521                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
522                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
523                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
524                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
525                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
526                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
527                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
528                         log_error("Failed to parse reply.");
529                         r = -EIO;
530                         goto finish;
531                 }
532
533                 if ((r = dot_one(bus, id, unit_path)) < 0)
534                         goto finish;
535
536                 /* printf("\t\"%s\";\n", id); */
537                 dbus_message_iter_next(&sub);
538         }
539
540         printf("}\n");
541
542         log_info("   Color legend: black     = Requires\n"
543                  "                 dark blue = Requisite\n"
544                  "                 dark grey = Wants\n"
545                  "                 red       = Conflicts\n"
546                  "                 green     = After\n");
547
548         if (isatty(fileno(stdout)))
549                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
550                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
551
552         r = 0;
553
554 finish:
555         if (m)
556                 dbus_message_unref(m);
557
558         if (reply)
559                 dbus_message_unref(reply);
560
561         dbus_error_free(&error);
562
563         return r;
564 }
565
566 static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
567         DBusMessage *m = NULL, *reply = NULL;
568         DBusError error;
569         int r;
570         DBusMessageIter iter, sub, sub2;
571         unsigned k = 0;
572
573         dbus_error_init(&error);
574
575         assert(bus);
576
577         if (!(m = dbus_message_new_method_call(
578                               "org.freedesktop.systemd1",
579                               "/org/freedesktop/systemd1",
580                               "org.freedesktop.systemd1.Manager",
581                               "ListJobs"))) {
582                 log_error("Could not allocate message.");
583                 return -ENOMEM;
584         }
585
586         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
587                 log_error("Failed to issue method call: %s", error.message);
588                 r = -EIO;
589                 goto finish;
590         }
591
592         if (!dbus_message_iter_init(reply, &iter) ||
593             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
594             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
595                 log_error("Failed to parse reply.");
596                 r = -EIO;
597                 goto finish;
598         }
599
600         dbus_message_iter_recurse(&iter, &sub);
601
602         printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
603
604         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
605                 const char *name, *type, *state, *job_path, *unit_path;
606                 uint32_t id;
607                 char *e;
608
609                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
610                         log_error("Failed to parse reply.");
611                         r = -EIO;
612                         goto finish;
613                 }
614
615                 dbus_message_iter_recurse(&sub, &sub2);
616
617                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
618                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
619                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
620                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
621                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
622                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
623                         log_error("Failed to parse reply.");
624                         r = -EIO;
625                         goto finish;
626                 }
627
628                 e = arg_full ? NULL : ellipsize(name, 45, 33);
629                 printf("%4u %-45s %-17s %-7s\n", id, e ? e : name, type, state);
630                 free(e);
631
632                 k++;
633
634                 dbus_message_iter_next(&sub);
635         }
636
637         printf("\n%u jobs listed.\n", k);
638         r = 0;
639
640 finish:
641         if (m)
642                 dbus_message_unref(m);
643
644         if (reply)
645                 dbus_message_unref(reply);
646
647         dbus_error_free(&error);
648
649         return r;
650 }
651
652 static int load_unit(DBusConnection *bus, char **args, unsigned n) {
653         DBusMessage *m = NULL, *reply = NULL;
654         DBusError error;
655         int r;
656         unsigned i;
657
658         dbus_error_init(&error);
659
660         assert(bus);
661         assert(args);
662
663         for (i = 1; i < n; i++) {
664
665                 if (!(m = dbus_message_new_method_call(
666                                       "org.freedesktop.systemd1",
667                                       "/org/freedesktop/systemd1",
668                                       "org.freedesktop.systemd1.Manager",
669                                       "LoadUnit"))) {
670                         log_error("Could not allocate message.");
671                         r = -ENOMEM;
672                         goto finish;
673                 }
674
675                 if (!dbus_message_append_args(m,
676                                               DBUS_TYPE_STRING, &args[i],
677                                               DBUS_TYPE_INVALID)) {
678                         log_error("Could not append arguments to message.");
679                         r = -ENOMEM;
680                         goto finish;
681                 }
682
683                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
684                         log_error("Failed to issue method call: %s", error.message);
685                         r = -EIO;
686                         goto finish;
687                 }
688
689                 dbus_message_unref(m);
690                 dbus_message_unref(reply);
691
692                 m = reply = NULL;
693         }
694
695         r = 0;
696
697 finish:
698         if (m)
699                 dbus_message_unref(m);
700
701         if (reply)
702                 dbus_message_unref(reply);
703
704         dbus_error_free(&error);
705
706         return r;
707 }
708
709 static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
710         DBusMessage *m = NULL, *reply = NULL;
711         DBusError error;
712         int r;
713         unsigned i;
714
715         dbus_error_init(&error);
716
717         assert(bus);
718         assert(args);
719
720         if (n <= 1)
721                 return daemon_reload(bus, args, n);
722
723         for (i = 1; i < n; i++) {
724                 unsigned id;
725                 const char *path;
726
727                 if (!(m = dbus_message_new_method_call(
728                                       "org.freedesktop.systemd1",
729                                       "/org/freedesktop/systemd1",
730                                       "org.freedesktop.systemd1.Manager",
731                                       "GetJob"))) {
732                         log_error("Could not allocate message.");
733                         r = -ENOMEM;
734                         goto finish;
735                 }
736
737                 if ((r = safe_atou(args[i], &id)) < 0) {
738                         log_error("Failed to parse job id: %s", strerror(-r));
739                         goto finish;
740                 }
741
742                 assert_cc(sizeof(uint32_t) == sizeof(id));
743                 if (!dbus_message_append_args(m,
744                                               DBUS_TYPE_UINT32, &id,
745                                               DBUS_TYPE_INVALID)) {
746                         log_error("Could not append arguments to message.");
747                         r = -ENOMEM;
748                         goto finish;
749                 }
750
751                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
752                         log_error("Failed to issue method call: %s", error.message);
753                         r = -EIO;
754                         goto finish;
755                 }
756
757                 if (!dbus_message_get_args(reply, &error,
758                                            DBUS_TYPE_OBJECT_PATH, &path,
759                                            DBUS_TYPE_INVALID)) {
760                         log_error("Failed to parse reply: %s", error.message);
761                         r = -EIO;
762                         goto finish;
763                 }
764
765                 dbus_message_unref(m);
766                 if (!(m = dbus_message_new_method_call(
767                                       "org.freedesktop.systemd1",
768                                       path,
769                                       "org.freedesktop.systemd1.Job",
770                                       "Cancel"))) {
771                         log_error("Could not allocate message.");
772                         r = -ENOMEM;
773                         goto finish;
774                 }
775
776                 dbus_message_unref(reply);
777                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
778                         log_error("Failed to issue method call: %s", error.message);
779                         r = -EIO;
780                         goto finish;
781                 }
782
783                 dbus_message_unref(m);
784                 dbus_message_unref(reply);
785                 m = reply = NULL;
786         }
787
788         r = 0;
789
790 finish:
791         if (m)
792                 dbus_message_unref(m);
793
794         if (reply)
795                 dbus_message_unref(reply);
796
797         dbus_error_free(&error);
798
799         return r;
800 }
801
802 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
803         DBusMessage *m = NULL, *reply = NULL;
804         dbus_bool_t b = FALSE;
805         DBusMessageIter iter, sub;
806         const char
807                 *interface = "org.freedesktop.systemd1.Unit",
808                 *property = "NeedDaemonReload",
809                 *path;
810
811         /* We ignore all errors here, since this is used to show a warning only */
812
813         if (!(m = dbus_message_new_method_call(
814                               "org.freedesktop.systemd1",
815                               "/org/freedesktop/systemd1",
816                               "org.freedesktop.systemd1.Manager",
817                               "GetUnit")))
818                 goto finish;
819
820         if (!dbus_message_append_args(m,
821                                       DBUS_TYPE_STRING, &unit,
822                                       DBUS_TYPE_INVALID))
823                 goto finish;
824
825         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
826                 goto finish;
827
828         if (!dbus_message_get_args(reply, NULL,
829                                    DBUS_TYPE_OBJECT_PATH, &path,
830                                    DBUS_TYPE_INVALID))
831                 goto finish;
832
833         dbus_message_unref(m);
834         if (!(m = dbus_message_new_method_call(
835                               "org.freedesktop.systemd1",
836                               path,
837                               "org.freedesktop.DBus.Properties",
838                               "Get")))
839                 goto finish;
840
841         if (!dbus_message_append_args(m,
842                                       DBUS_TYPE_STRING, &interface,
843                                       DBUS_TYPE_STRING, &property,
844                                       DBUS_TYPE_INVALID)) {
845                 goto finish;
846         }
847
848         dbus_message_unref(reply);
849         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
850                 goto finish;
851
852         if (!dbus_message_iter_init(reply, &iter) ||
853             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
854                 goto finish;
855
856         dbus_message_iter_recurse(&iter, &sub);
857
858         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
859                 goto finish;
860
861         dbus_message_iter_get_basic(&sub, &b);
862
863 finish:
864         if (m)
865                 dbus_message_unref(m);
866
867         if (reply)
868                 dbus_message_unref(reply);
869
870         return b;
871 }
872
873 typedef struct WaitData {
874         Set *set;
875         bool failed;
876 } WaitData;
877
878 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
879         DBusError error;
880         WaitData *d = data;
881
882         assert(connection);
883         assert(message);
884         assert(d);
885
886         dbus_error_init(&error);
887
888         log_debug("Got D-Bus request: %s.%s() on %s",
889                   dbus_message_get_interface(message),
890                   dbus_message_get_member(message),
891                   dbus_message_get_path(message));
892
893         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
894                 log_error("Warning! D-Bus connection terminated.");
895                 dbus_connection_close(connection);
896
897         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
898                 uint32_t id;
899                 const char *path;
900                 dbus_bool_t success = true;
901
902                 if (!dbus_message_get_args(message, &error,
903                                            DBUS_TYPE_UINT32, &id,
904                                            DBUS_TYPE_OBJECT_PATH, &path,
905                                            DBUS_TYPE_BOOLEAN, &success,
906                                            DBUS_TYPE_INVALID))
907                         log_error("Failed to parse message: %s", error.message);
908                 else {
909                         char *p;
910
911                         if ((p = set_remove(d->set, (char*) path)))
912                                 free(p);
913
914                         if (!success)
915                                 d->failed = true;
916                 }
917         }
918
919         dbus_error_free(&error);
920         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
921 }
922
923 static int enable_wait_for_jobs(DBusConnection *bus) {
924         DBusError error;
925
926         assert(bus);
927
928         if (private_bus)
929                 return 0;
930
931         dbus_error_init(&error);
932         dbus_bus_add_match(bus,
933                            "type='signal',"
934                            "sender='org.freedesktop.systemd1',"
935                            "interface='org.freedesktop.systemd1.Manager',"
936                            "member='JobRemoved',"
937                            "path='/org/freedesktop/systemd1'",
938                            &error);
939
940         if (dbus_error_is_set(&error)) {
941                 log_error("Failed to add match: %s", error.message);
942                 dbus_error_free(&error);
943                 return -EIO;
944         }
945
946         /* This is slightly dirty, since we don't undo the match registrations. */
947         return 0;
948 }
949
950 static int wait_for_jobs(DBusConnection *bus, Set *s) {
951         int r;
952         WaitData d;
953
954         assert(bus);
955         assert(s);
956
957         zero(d);
958         d.set = s;
959         d.failed = false;
960
961         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
962                 log_error("Failed to add filter.");
963                 r = -ENOMEM;
964                 goto finish;
965         }
966
967         while (!set_isempty(s) &&
968                dbus_connection_read_write_dispatch(bus, -1))
969                 ;
970
971         if (!arg_quiet && d.failed)
972                 log_error("Job failed, see logs for details.");
973
974         r = d.failed ? -EIO : 0;
975
976 finish:
977         /* This is slightly dirty, since we don't undo the filter registration. */
978
979         return r;
980 }
981
982 static int start_unit_one(
983                 DBusConnection *bus,
984                 const char *method,
985                 const char *name,
986                 const char *mode,
987                 Set *s) {
988
989         DBusMessage *m = NULL, *reply = NULL;
990         DBusError error;
991         const char *path;
992         int r;
993
994         assert(bus);
995         assert(method);
996         assert(name);
997         assert(mode);
998         assert(arg_no_block || s);
999
1000         dbus_error_init(&error);
1001
1002         if (!(m = dbus_message_new_method_call(
1003                               "org.freedesktop.systemd1",
1004                               "/org/freedesktop/systemd1",
1005                               "org.freedesktop.systemd1.Manager",
1006                               method))) {
1007                 log_error("Could not allocate message.");
1008                 r = -ENOMEM;
1009                 goto finish;
1010         }
1011
1012         if (!dbus_message_append_args(m,
1013                                       DBUS_TYPE_STRING, &name,
1014                                       DBUS_TYPE_STRING, &mode,
1015                                       DBUS_TYPE_INVALID)) {
1016                 log_error("Could not append arguments to message.");
1017                 r = -ENOMEM;
1018                 goto finish;
1019         }
1020
1021         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1022
1023                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
1024                         /* There's always a fallback possible for
1025                          * legacy actions. */
1026                         r = 0;
1027                         goto finish;
1028                 }
1029
1030                 log_error("Failed to issue method call: %s", error.message);
1031                 r = -EIO;
1032                 goto finish;
1033         }
1034
1035         if (!dbus_message_get_args(reply, &error,
1036                                    DBUS_TYPE_OBJECT_PATH, &path,
1037                                    DBUS_TYPE_INVALID)) {
1038                 log_error("Failed to parse reply: %s", error.message);
1039                 r = -EIO;
1040                 goto finish;
1041         }
1042
1043         if (need_daemon_reload(bus, name))
1044                 log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1045                             arg_session ? "--session" : "--system");
1046
1047         if (!arg_no_block) {
1048                 char *p;
1049
1050                 if (!(p = strdup(path))) {
1051                         log_error("Failed to duplicate path.");
1052                         r = -ENOMEM;
1053                         goto finish;
1054                 }
1055
1056                 if ((r = set_put(s, p)) < 0) {
1057                         free(p);
1058                         log_error("Failed to add path to set.");
1059                         goto finish;
1060                 }
1061         }
1062
1063         r = 1;
1064
1065 finish:
1066         if (m)
1067                 dbus_message_unref(m);
1068
1069         if (reply)
1070                 dbus_message_unref(reply);
1071
1072         dbus_error_free(&error);
1073
1074         return r;
1075 }
1076
1077 static enum action verb_to_action(const char *verb) {
1078         if (streq(verb, "halt"))
1079                 return ACTION_HALT;
1080         else if (streq(verb, "poweroff"))
1081                 return ACTION_POWEROFF;
1082         else if (streq(verb, "reboot"))
1083                 return ACTION_REBOOT;
1084         else if (streq(verb, "rescue"))
1085                 return ACTION_RESCUE;
1086         else if (streq(verb, "emergency"))
1087                 return ACTION_EMERGENCY;
1088         else if (streq(verb, "default"))
1089                 return ACTION_DEFAULT;
1090         else
1091                 return ACTION_INVALID;
1092 }
1093
1094 static int start_unit(DBusConnection *bus, char **args, unsigned n) {
1095
1096         static const char * const table[_ACTION_MAX] = {
1097                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1098                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1099                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1100                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1101                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1102                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1103                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1104                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1105                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1106                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET
1107         };
1108
1109         int r;
1110         unsigned i;
1111         const char *method, *mode, *one_name;
1112         Set *s = NULL;
1113
1114         assert(bus);
1115
1116         if (arg_action == ACTION_SYSTEMCTL) {
1117                 method =
1118                         streq(args[0], "stop")                  ? "StopUnit" :
1119                         streq(args[0], "reload")                ? "ReloadUnit" :
1120                         streq(args[0], "restart")               ? "RestartUnit" :
1121                         streq(args[0], "try-restart")           ? "TryRestartUnit" :
1122                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1123                         streq(args[0], "reload-or-try-restart") ||
1124                         streq(args[0], "force-reload")          ||
1125                         streq(args[0], "condrestart")           ? "ReloadOrTryRestartUnit" :
1126                                                                   "StartUnit";
1127
1128                 mode =
1129                         (streq(args[0], "isolate") ||
1130                          streq(args[0], "rescue")  ||
1131                          streq(args[0], "emergency")) ? "isolate" :
1132                                              arg_fail ? "fail" :
1133                                                         "replace";
1134
1135                 one_name = table[verb_to_action(args[0])];
1136
1137         } else {
1138                 assert(arg_action < ELEMENTSOF(table));
1139                 assert(table[arg_action]);
1140
1141                 method = "StartUnit";
1142
1143                 mode = (arg_action == ACTION_EMERGENCY ||
1144                         arg_action == ACTION_RESCUE) ? "isolate" : "replace";
1145
1146                 one_name = table[arg_action];
1147         }
1148
1149         if (!arg_no_block) {
1150                 if ((r = enable_wait_for_jobs(bus)) < 0) {
1151                         log_error("Could not watch jobs: %s", strerror(-r));
1152                         goto finish;
1153                 }
1154
1155                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1156                         log_error("Failed to allocate set.");
1157                         r = -ENOMEM;
1158                         goto finish;
1159                 }
1160         }
1161
1162         r = 0;
1163
1164         if (one_name) {
1165                 if ((r = start_unit_one(bus, method, one_name, mode, s)) <= 0)
1166                         goto finish;
1167         } else {
1168                 for (i = 1; i < n; i++)
1169                         if ((r = start_unit_one(bus, method, args[i], mode, s)) < 0)
1170                                 goto finish;
1171         }
1172
1173         if (!arg_no_block)
1174                 r = wait_for_jobs(bus, s);
1175
1176 finish:
1177         if (s)
1178                 set_free_free(s);
1179
1180         return r;
1181 }
1182
1183 static int start_special(DBusConnection *bus, char **args, unsigned n) {
1184         int r;
1185
1186         assert(bus);
1187         assert(args);
1188
1189         r = start_unit(bus, args, n);
1190
1191         if (r >= 0)
1192                 warn_wall(verb_to_action(args[0]));
1193
1194         return r;
1195 }
1196
1197 static int check_unit(DBusConnection *bus, char **args, unsigned n) {
1198         DBusMessage *m = NULL, *reply = NULL;
1199         const char
1200                 *interface = "org.freedesktop.systemd1.Unit",
1201                 *property = "ActiveState";
1202         int r = -EADDRNOTAVAIL;
1203         DBusError error;
1204         unsigned i;
1205
1206         assert(bus);
1207         assert(args);
1208
1209         dbus_error_init(&error);
1210
1211         for (i = 1; i < n; i++) {
1212                 const char *path = NULL;
1213                 const char *state;
1214                 DBusMessageIter iter, sub;
1215
1216                 if (!(m = dbus_message_new_method_call(
1217                                       "org.freedesktop.systemd1",
1218                                       "/org/freedesktop/systemd1",
1219                                       "org.freedesktop.systemd1.Manager",
1220                                       "GetUnit"))) {
1221                         log_error("Could not allocate message.");
1222                         r = -ENOMEM;
1223                         goto finish;
1224                 }
1225
1226                 if (!dbus_message_append_args(m,
1227                                               DBUS_TYPE_STRING, &args[i],
1228                                               DBUS_TYPE_INVALID)) {
1229                         log_error("Could not append arguments to message.");
1230                         r = -ENOMEM;
1231                         goto finish;
1232                 }
1233
1234                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1235
1236                         /* Hmm, cannot figure out anything about this unit... */
1237                         if (!arg_quiet)
1238                                 puts("unknown");
1239
1240                         dbus_error_free(&error);
1241                         continue;
1242                 }
1243
1244                 if (!dbus_message_get_args(reply, &error,
1245                                            DBUS_TYPE_OBJECT_PATH, &path,
1246                                            DBUS_TYPE_INVALID)) {
1247                         log_error("Failed to parse reply: %s", error.message);
1248                         r = -EIO;
1249                         goto finish;
1250                 }
1251
1252                 dbus_message_unref(m);
1253                 if (!(m = dbus_message_new_method_call(
1254                                       "org.freedesktop.systemd1",
1255                                       path,
1256                                       "org.freedesktop.DBus.Properties",
1257                                       "Get"))) {
1258                         log_error("Could not allocate message.");
1259                         r = -ENOMEM;
1260                         goto finish;
1261                 }
1262
1263                 if (!dbus_message_append_args(m,
1264                                               DBUS_TYPE_STRING, &interface,
1265                                               DBUS_TYPE_STRING, &property,
1266                                               DBUS_TYPE_INVALID)) {
1267                         log_error("Could not append arguments to message.");
1268                         r = -ENOMEM;
1269                         goto finish;
1270                 }
1271
1272                 dbus_message_unref(reply);
1273                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1274                         log_error("Failed to issue method call: %s", error.message);
1275                         r = -EIO;
1276                         goto finish;
1277                 }
1278
1279                 if (!dbus_message_iter_init(reply, &iter) ||
1280                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1281                         log_error("Failed to parse reply.");
1282                         r = -EIO;
1283                         goto finish;
1284                 }
1285
1286                 dbus_message_iter_recurse(&iter, &sub);
1287
1288                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1289                         log_error("Failed to parse reply.");
1290                         r = -EIO;
1291                         goto finish;
1292                 }
1293
1294                 dbus_message_iter_get_basic(&sub, &state);
1295
1296                 if (!arg_quiet)
1297                         puts(state);
1298
1299                 if (streq(state, "active") || startswith(state, "reloading"))
1300                         r = 0;
1301
1302                 dbus_message_unref(m);
1303                 dbus_message_unref(reply);
1304                 m = reply = NULL;
1305         }
1306
1307 finish:
1308         if (m)
1309                 dbus_message_unref(m);
1310
1311         if (reply)
1312                 dbus_message_unref(reply);
1313
1314         dbus_error_free(&error);
1315
1316         return r;
1317 }
1318
1319 typedef struct ExecStatusInfo {
1320         char *path;
1321         char **argv;
1322
1323         bool ignore;
1324
1325         usec_t start_timestamp;
1326         usec_t exit_timestamp;
1327         pid_t pid;
1328         int code;
1329         int status;
1330
1331         LIST_FIELDS(struct ExecStatusInfo, exec);
1332 } ExecStatusInfo;
1333
1334 static void exec_status_info_free(ExecStatusInfo *i) {
1335         assert(i);
1336
1337         free(i->path);
1338         strv_free(i->argv);
1339         free(i);
1340 }
1341
1342 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1343         uint64_t start_timestamp, exit_timestamp;
1344         DBusMessageIter sub2, sub3;
1345         const char*path;
1346         unsigned n;
1347         uint32_t pid;
1348         int32_t code, status;
1349         dbus_bool_t ignore;
1350
1351         assert(i);
1352         assert(i);
1353
1354         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1355                 return -EIO;
1356
1357         dbus_message_iter_recurse(sub, &sub2);
1358
1359         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1360                 return -EIO;
1361
1362         if (!(i->path = strdup(path)))
1363                 return -ENOMEM;
1364
1365         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1366             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1367                 return -EIO;
1368
1369         n = 0;
1370         dbus_message_iter_recurse(&sub2, &sub3);
1371         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1372                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1373                 dbus_message_iter_next(&sub3);
1374                 n++;
1375         }
1376
1377
1378         if (!(i->argv = new0(char*, n+1)))
1379                 return -ENOMEM;
1380
1381         n = 0;
1382         dbus_message_iter_recurse(&sub2, &sub3);
1383         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1384                 const char *s;
1385
1386                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1387                 dbus_message_iter_get_basic(&sub3, &s);
1388                 dbus_message_iter_next(&sub3);
1389
1390                 if (!(i->argv[n++] = strdup(s)))
1391                         return -ENOMEM;
1392         }
1393
1394         if (!dbus_message_iter_next(&sub2) ||
1395             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1396             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1397             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1398             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1399             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1400             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1401                 return -EIO;
1402
1403         i->ignore = ignore;
1404         i->start_timestamp = (usec_t) start_timestamp;
1405         i->exit_timestamp = (usec_t) exit_timestamp;
1406         i->pid = (pid_t) pid;
1407         i->code = code;
1408         i->status = status;
1409
1410         return 0;
1411 }
1412
1413 typedef struct UnitStatusInfo {
1414         const char *id;
1415         const char *load_state;
1416         const char *active_state;
1417         const char *sub_state;
1418
1419         const char *description;
1420
1421         const char *fragment_path;
1422         const char *default_control_group;
1423
1424         bool need_daemon_reload;
1425
1426         /* Service */
1427         pid_t main_pid;
1428         pid_t control_pid;
1429         const char *status_text;
1430         bool running;
1431
1432         usec_t start_timestamp;
1433         usec_t exit_timestamp;
1434
1435         int exit_code, exit_status;
1436
1437         /* Socket */
1438         unsigned n_accepted;
1439         unsigned n_connections;
1440         bool accept;
1441
1442         /* Device */
1443         const char *sysfs_path;
1444
1445         /* Mount, Automount */
1446         const char *where;
1447
1448         /* Swap */
1449         const char *what;
1450
1451         LIST_HEAD(ExecStatusInfo, exec);
1452 } UnitStatusInfo;
1453
1454 static void print_status_info(UnitStatusInfo *i) {
1455         ExecStatusInfo *p;
1456         const char *on, *off, *ss;
1457
1458         assert(i);
1459
1460         /* This shows pretty information about a unit. See
1461          * print_property() for a low-level property printer */
1462
1463         printf("%s", strna(i->id));
1464
1465         if (i->description && !streq_ptr(i->id, i->description))
1466                 printf(" - %s", i->description);
1467
1468         printf("\n");
1469
1470         if (i->fragment_path)
1471                 printf("\t  Loaded: %s (%s)\n", strna(i->load_state), i->fragment_path);
1472         else if (streq_ptr(i->load_state, "failed"))
1473                 printf("\t  Loaded: %s%s%s\n",
1474                        ansi_highlight(true),
1475                        strna(i->load_state),
1476                        ansi_highlight(false));
1477         else
1478                 printf("\t  Loaded: %s\n", strna(i->load_state));
1479
1480         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1481
1482         if (streq_ptr(i->active_state, "maintenance")) {
1483                 on = ansi_highlight(true);
1484                 off = ansi_highlight(false);
1485         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1486                 on = ansi_highlight_green(true);
1487                 off = ansi_highlight_green(false);
1488         } else
1489                 on = off = "";
1490
1491         if (ss)
1492                 printf("\t  Active: %s%s (%s)%s\n",
1493                        on,
1494                        strna(i->active_state),
1495                        ss,
1496                        off);
1497         else
1498                 printf("\t  Active: %s%s%s\n",
1499                        on,
1500                        strna(i->active_state),
1501                        off);
1502
1503         if (i->sysfs_path)
1504                 printf("\t  Device: %s\n", i->sysfs_path);
1505         else if (i->where)
1506                 printf("\t   Where: %s\n", i->where);
1507         else if (i->what)
1508                 printf("\t    What: %s\n", i->what);
1509
1510         if (i->accept)
1511                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1512
1513         LIST_FOREACH(exec, p, i->exec) {
1514                 char *t;
1515
1516                 /* Only show exited processes here */
1517                 if (p->code == 0)
1518                         continue;
1519
1520                 t = strv_join(p->argv, " ");
1521                 printf("\t  Exited: %u (%s, code=%s, ", p->pid, strna(t), sigchld_code_to_string(p->code));
1522                 free(t);
1523
1524                 if (p->code == CLD_EXITED)
1525                         printf("status=%i", p->status);
1526                 else
1527                         printf("signal=%s", signal_to_string(p->status));
1528                 printf(")\n");
1529
1530                 if (i->main_pid == p->pid &&
1531                     i->start_timestamp == p->start_timestamp &&
1532                     i->exit_timestamp == p->start_timestamp)
1533                         /* Let's not show this twice */
1534                         i->main_pid = 0;
1535
1536                 if (p->pid == i->control_pid)
1537                         i->control_pid = 0;
1538         }
1539
1540         if (i->main_pid > 0 || i->control_pid > 0) {
1541                 printf("\t");
1542
1543                 if (i->main_pid > 0) {
1544                         printf("    Main: %u", (unsigned) i->main_pid);
1545
1546                         if (i->running) {
1547                                 char *t = NULL;
1548                                 get_process_name(i->main_pid, &t);
1549                                 if (t) {
1550                                         printf(" (%s)", t);
1551                                         free(t);
1552                                 }
1553                         } else if (i->exit_code > 0) {
1554                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
1555
1556                                 if (i->exit_code == CLD_EXITED)
1557                                         printf("status=%i", i->exit_status);
1558                                 else
1559                                         printf("signal=%s", signal_to_string(i->exit_status));
1560                                 printf(")");
1561                         }
1562                 }
1563
1564                 if (i->main_pid > 0 && i->control_pid > 0)
1565                         printf(";");
1566
1567                 if (i->control_pid > 0) {
1568                         char *t = NULL;
1569
1570                         printf(" Control: %u", (unsigned) i->control_pid);
1571
1572                         get_process_name(i->control_pid, &t);
1573                         if (t) {
1574                                 printf(" (%s)", t);
1575                                 free(t);
1576                         }
1577                 }
1578
1579                 printf("\n");
1580         }
1581
1582         if (i->status_text)
1583                 printf("\t  Status: \"%s\"\n", i->status_text);
1584
1585         if (i->default_control_group) {
1586                 unsigned c;
1587
1588                 printf("\t  CGroup: %s\n", i->default_control_group);
1589
1590                 if ((c = columns()) > 18)
1591                         c -= 18;
1592                 else
1593                         c = 0;
1594
1595                 show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
1596         }
1597
1598         if (i->need_daemon_reload)
1599                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
1600                        ansi_highlight(true),
1601                        ansi_highlight(false),
1602                        arg_session ? "--session" : "--system");
1603 }
1604
1605 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
1606
1607         switch (dbus_message_iter_get_arg_type(iter)) {
1608
1609         case DBUS_TYPE_STRING: {
1610                 const char *s;
1611
1612                 dbus_message_iter_get_basic(iter, &s);
1613
1614                 if (s[0]) {
1615                         if (streq(name, "Id"))
1616                                 i->id = s;
1617                         else if (streq(name, "LoadState"))
1618                                 i->load_state = s;
1619                         else if (streq(name, "ActiveState"))
1620                                 i->active_state = s;
1621                         else if (streq(name, "SubState"))
1622                                 i->sub_state = s;
1623                         else if (streq(name, "Description"))
1624                                 i->description = s;
1625                         else if (streq(name, "FragmentPath"))
1626                                 i->fragment_path = s;
1627                         else if (streq(name, "DefaultControlGroup"))
1628                                 i->default_control_group = s;
1629                         else if (streq(name, "StatusText"))
1630                                 i->status_text = s;
1631                         else if (streq(name, "SysFSPath"))
1632                                 i->sysfs_path = s;
1633                         else if (streq(name, "Where"))
1634                                 i->where = s;
1635                         else if (streq(name, "What"))
1636                                 i->what = s;
1637                 }
1638
1639                 break;
1640         }
1641
1642         case DBUS_TYPE_BOOLEAN: {
1643                 dbus_bool_t b;
1644
1645                 dbus_message_iter_get_basic(iter, &b);
1646
1647                 if (streq(name, "Accept"))
1648                         i->accept = b;
1649                 else if (streq(name, "NeedDaemonReload"))
1650                         i->need_daemon_reload = b;
1651
1652                 break;
1653         }
1654
1655         case DBUS_TYPE_UINT32: {
1656                 uint32_t u;
1657
1658                 dbus_message_iter_get_basic(iter, &u);
1659
1660                 if (streq(name, "MainPID")) {
1661                         if (u > 0) {
1662                                 i->main_pid = (pid_t) u;
1663                                 i->running = true;
1664                         }
1665                 } else if (streq(name, "ControlPID"))
1666                         i->control_pid = (pid_t) u;
1667                 else if (streq(name, "ExecMainPID")) {
1668                         if (u > 0)
1669                                 i->main_pid = (pid_t) u;
1670                 } else if (streq(name, "NAccepted"))
1671                         i->n_accepted = u;
1672                 else if (streq(name, "NConnections"))
1673                         i->n_connections = u;
1674
1675                 break;
1676         }
1677
1678         case DBUS_TYPE_INT32: {
1679                 int32_t j;
1680
1681                 dbus_message_iter_get_basic(iter, &j);
1682
1683                 if (streq(name, "ExecMainCode"))
1684                         i->exit_code = (int) j;
1685                 else if (streq(name, "ExecMainStatus"))
1686                         i->exit_status = (int) j;
1687
1688                 break;
1689         }
1690
1691         case DBUS_TYPE_UINT64: {
1692                 uint64_t u;
1693
1694                 dbus_message_iter_get_basic(iter, &u);
1695
1696                 if (streq(name, "ExecMainStartTimestamp"))
1697                         i->start_timestamp = (usec_t) u;
1698                 else if (streq(name, "ExecMainExitTimestamp"))
1699                         i->exit_timestamp = (usec_t) u;
1700
1701                 break;
1702         }
1703
1704         case DBUS_TYPE_ARRAY: {
1705
1706                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
1707                     startswith(name, "Exec")) {
1708                         DBusMessageIter sub;
1709
1710                         dbus_message_iter_recurse(iter, &sub);
1711                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1712                                 ExecStatusInfo *info;
1713                                 int r;
1714
1715                                 if (!(info = new0(ExecStatusInfo, 1)))
1716                                         return -ENOMEM;
1717
1718                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
1719                                         free(info);
1720                                         return r;
1721                                 }
1722
1723                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
1724
1725                                 dbus_message_iter_next(&sub);
1726                         }
1727                 }
1728
1729                 break;
1730         }
1731         }
1732
1733         return 0;
1734 }
1735
1736 static int print_property(const char *name, DBusMessageIter *iter) {
1737         assert(name);
1738         assert(iter);
1739
1740         /* This is a low-level property printer, see
1741          * print_status_info() for the nicer output */
1742
1743         if (arg_property && !strv_find(arg_property, name))
1744                 return 0;
1745
1746         switch (dbus_message_iter_get_arg_type(iter)) {
1747
1748         case DBUS_TYPE_STRING: {
1749                 const char *s;
1750                 dbus_message_iter_get_basic(iter, &s);
1751
1752                 if (arg_all || s[0])
1753                         printf("%s=%s\n", name, s);
1754
1755                 return 0;
1756         }
1757
1758         case DBUS_TYPE_BOOLEAN: {
1759                 dbus_bool_t b;
1760                 dbus_message_iter_get_basic(iter, &b);
1761                 printf("%s=%s\n", name, yes_no(b));
1762
1763                 return 0;
1764         }
1765
1766         case DBUS_TYPE_UINT64: {
1767                 uint64_t u;
1768                 dbus_message_iter_get_basic(iter, &u);
1769
1770                 /* Yes, heuristics! But we can change this check
1771                  * should it turn out to not be sufficient */
1772
1773                 if (strstr(name, "Timestamp")) {
1774                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
1775
1776                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
1777                                 printf("%s=%s\n", name, strempty(t));
1778                 } else if (strstr(name, "USec")) {
1779                         char timespan[FORMAT_TIMESPAN_MAX];
1780
1781                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
1782                 } else
1783                         printf("%s=%llu\n", name, (unsigned long long) u);
1784
1785                 return 0;
1786         }
1787
1788         case DBUS_TYPE_UINT32: {
1789                 uint32_t u;
1790                 dbus_message_iter_get_basic(iter, &u);
1791
1792                 if (strstr(name, "UMask") || strstr(name, "Mode"))
1793                         printf("%s=%04o\n", name, u);
1794                 else
1795                         printf("%s=%u\n", name, (unsigned) u);
1796
1797                 return 0;
1798         }
1799
1800         case DBUS_TYPE_INT32: {
1801                 int32_t i;
1802                 dbus_message_iter_get_basic(iter, &i);
1803
1804                 printf("%s=%i\n", name, (int) i);
1805                 return 0;
1806         }
1807
1808         case DBUS_TYPE_STRUCT: {
1809                 DBusMessageIter sub;
1810                 dbus_message_iter_recurse(iter, &sub);
1811
1812                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
1813                         uint32_t u;
1814
1815                         dbus_message_iter_get_basic(&sub, &u);
1816
1817                         if (u)
1818                                 printf("%s=%u\n", name, (unsigned) u);
1819                         else if (arg_all)
1820                                 printf("%s=\n", name);
1821
1822                         return 0;
1823                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
1824                         const char *s;
1825
1826                         dbus_message_iter_get_basic(&sub, &s);
1827
1828                         if (arg_all || s[0])
1829                                 printf("%s=%s\n", name, s);
1830
1831                         return 0;
1832                 }
1833
1834                 break;
1835         }
1836
1837         case DBUS_TYPE_ARRAY:
1838
1839                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
1840                         DBusMessageIter sub;
1841                         bool space = false;
1842
1843                         dbus_message_iter_recurse(iter, &sub);
1844                         if (arg_all ||
1845                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1846                                 printf("%s=", name);
1847
1848                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1849                                         const char *s;
1850
1851                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1852                                         dbus_message_iter_get_basic(&sub, &s);
1853                                         printf("%s%s", space ? " " : "", s);
1854
1855                                         space = true;
1856                                         dbus_message_iter_next(&sub);
1857                                 }
1858
1859                                 puts("");
1860                         }
1861
1862                         return 0;
1863
1864                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
1865                         DBusMessageIter sub;
1866
1867                         dbus_message_iter_recurse(iter, &sub);
1868                         if (arg_all ||
1869                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1870                                 printf("%s=", name);
1871
1872                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1873                                         uint8_t u;
1874
1875                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
1876                                         dbus_message_iter_get_basic(&sub, &u);
1877                                         printf("%02x", u);
1878
1879                                         dbus_message_iter_next(&sub);
1880                                 }
1881
1882                                 puts("");
1883                         }
1884
1885                         return 0;
1886
1887                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
1888                         DBusMessageIter sub, sub2;
1889
1890                         dbus_message_iter_recurse(iter, &sub);
1891                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1892                                 const char *type, *path;
1893
1894                                 dbus_message_iter_recurse(&sub, &sub2);
1895
1896                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
1897                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
1898                                         printf("%s=%s\n", type, path);
1899
1900                                 dbus_message_iter_next(&sub);
1901                         }
1902
1903                         return 0;
1904
1905                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
1906                         DBusMessageIter sub, sub2;
1907
1908                         dbus_message_iter_recurse(iter, &sub);
1909                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1910                                 const char *base;
1911                                 uint64_t value, next_elapse;
1912
1913                                 dbus_message_iter_recurse(&sub, &sub2);
1914
1915                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
1916                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
1917                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
1918                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
1919
1920                                         printf("%s={ value=%s ; next_elapse=%s }\n",
1921                                                base,
1922                                                format_timespan(timespan1, sizeof(timespan1), value),
1923                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
1924                                 }
1925
1926                                 dbus_message_iter_next(&sub);
1927                         }
1928
1929                         return 0;
1930
1931                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
1932                         DBusMessageIter sub;
1933
1934                         dbus_message_iter_recurse(iter, &sub);
1935                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1936                                 ExecStatusInfo info;
1937
1938                                 zero(info);
1939                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
1940                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
1941                                         char *t;
1942
1943                                         t = strv_join(info.argv, " ");
1944
1945                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
1946                                                name,
1947                                                strna(info.path),
1948                                                strna(t),
1949                                                yes_no(info.ignore),
1950                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
1951                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
1952                                                (unsigned) info. pid,
1953                                                sigchld_code_to_string(info.code),
1954                                                info.status,
1955                                                info.code == CLD_EXITED ? "" : "/",
1956                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
1957
1958                                         free(t);
1959                                 }
1960
1961                                 free(info.path);
1962                                 strv_free(info.argv);
1963
1964                                 dbus_message_iter_next(&sub);
1965                         }
1966
1967                         return 0;
1968                 }
1969
1970                 break;
1971         }
1972
1973         if (arg_all)
1974                 printf("%s=[unprintable]\n", name);
1975
1976         return 0;
1977 }
1978
1979 static int show_one(DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
1980         DBusMessage *m = NULL, *reply = NULL;
1981         const char *interface = "";
1982         int r;
1983         DBusError error;
1984         DBusMessageIter iter, sub, sub2, sub3;
1985         UnitStatusInfo info;
1986         ExecStatusInfo *p;
1987
1988         assert(bus);
1989         assert(path);
1990         assert(new_line);
1991
1992         zero(info);
1993         dbus_error_init(&error);
1994
1995         if (!(m = dbus_message_new_method_call(
1996                               "org.freedesktop.systemd1",
1997                               path,
1998                               "org.freedesktop.DBus.Properties",
1999                               "GetAll"))) {
2000                 log_error("Could not allocate message.");
2001                 r = -ENOMEM;
2002                 goto finish;
2003         }
2004
2005         if (!dbus_message_append_args(m,
2006                                       DBUS_TYPE_STRING, &interface,
2007                                       DBUS_TYPE_INVALID)) {
2008                 log_error("Could not append arguments to message.");
2009                 r = -ENOMEM;
2010                 goto finish;
2011         }
2012
2013         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2014                 log_error("Failed to issue method call: %s", error.message);
2015                 r = -EIO;
2016                 goto finish;
2017         }
2018
2019         if (!dbus_message_iter_init(reply, &iter) ||
2020             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2021             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2022                 log_error("Failed to parse reply.");
2023                 r = -EIO;
2024                 goto finish;
2025         }
2026
2027         dbus_message_iter_recurse(&iter, &sub);
2028
2029         if (*new_line)
2030                 printf("\n");
2031
2032         *new_line = true;
2033
2034         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2035                 const char *name;
2036
2037                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2038                         log_error("Failed to parse reply.");
2039                         r = -EIO;
2040                         goto finish;
2041                 }
2042
2043                 dbus_message_iter_recurse(&sub, &sub2);
2044
2045                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2046                         log_error("Failed to parse reply.");
2047                         r = -EIO;
2048                         goto finish;
2049                 }
2050
2051                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2052                         log_error("Failed to parse reply.");
2053                         r = -EIO;
2054                         goto finish;
2055                 }
2056
2057                 dbus_message_iter_recurse(&sub2, &sub3);
2058
2059                 if (show_properties)
2060                         r = print_property(name, &sub3);
2061                 else
2062                         r = status_property(name, &sub3, &info);
2063
2064                 if (r < 0) {
2065                         log_error("Failed to parse reply.");
2066                         r = -EIO;
2067                         goto finish;
2068                 }
2069
2070                 dbus_message_iter_next(&sub);
2071         }
2072
2073         if (!show_properties)
2074                 print_status_info(&info);
2075
2076         while ((p = info.exec)) {
2077                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2078                 exec_status_info_free(p);
2079         }
2080
2081         r = 0;
2082
2083 finish:
2084         if (m)
2085                 dbus_message_unref(m);
2086
2087         if (reply)
2088                 dbus_message_unref(reply);
2089
2090         dbus_error_free(&error);
2091
2092         return r;
2093 }
2094
2095 static int show(DBusConnection *bus, char **args, unsigned n) {
2096         DBusMessage *m = NULL, *reply = NULL;
2097         int r;
2098         DBusError error;
2099         unsigned i;
2100         bool show_properties, new_line = false;
2101
2102         assert(bus);
2103         assert(args);
2104
2105         dbus_error_init(&error);
2106
2107         show_properties = !streq(args[0], "status");
2108
2109         if (show_properties && n <= 1) {
2110                 /* If not argument is specified inspect the manager
2111                  * itself */
2112
2113                 r = show_one(bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2114                 goto finish;
2115         }
2116
2117         for (i = 1; i < n; i++) {
2118                 const char *path = NULL;
2119                 uint32_t id;
2120
2121                 if (!show_properties || safe_atou32(args[i], &id) < 0) {
2122
2123                         if (!(m = dbus_message_new_method_call(
2124                                               "org.freedesktop.systemd1",
2125                                               "/org/freedesktop/systemd1",
2126                                               "org.freedesktop.systemd1.Manager",
2127                                               "LoadUnit"))) {
2128                                 log_error("Could not allocate message.");
2129                                 r = -ENOMEM;
2130                                 goto finish;
2131                         }
2132
2133                         if (!dbus_message_append_args(m,
2134                                                       DBUS_TYPE_STRING, &args[i],
2135                                                       DBUS_TYPE_INVALID)) {
2136                                 log_error("Could not append arguments to message.");
2137                                 r = -ENOMEM;
2138                                 goto finish;
2139                         }
2140
2141                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2142
2143                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2144                                         log_error("Failed to issue method call: %s", error.message);
2145                                         r = -EIO;
2146                                         goto finish;
2147                                 }
2148
2149                                 dbus_error_free(&error);
2150
2151                                 dbus_message_unref(m);
2152                                 if (!(m = dbus_message_new_method_call(
2153                                                       "org.freedesktop.systemd1",
2154                                                       "/org/freedesktop/systemd1",
2155                                                       "org.freedesktop.systemd1.Manager",
2156                                                       "GetUnit"))) {
2157                                         log_error("Could not allocate message.");
2158                                         r = -ENOMEM;
2159                                         goto finish;
2160                                 }
2161
2162                                 if (!dbus_message_append_args(m,
2163                                                               DBUS_TYPE_STRING, &args[i],
2164                                                               DBUS_TYPE_INVALID)) {
2165                                         log_error("Could not append arguments to message.");
2166                                         r = -ENOMEM;
2167                                         goto finish;
2168                                 }
2169
2170                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2171                                         log_error("Failed to issue method call: %s", error.message);
2172                                         r = -EIO;
2173                                         goto finish;
2174                                 }
2175                         }
2176
2177                 } else {
2178
2179                         if (!(m = dbus_message_new_method_call(
2180                                               "org.freedesktop.systemd1",
2181                                               "/org/freedesktop/systemd1",
2182                                               "org.freedesktop.systemd1.Manager",
2183                                               "GetJob"))) {
2184                                 log_error("Could not allocate message.");
2185                                 r = -ENOMEM;
2186                                 goto finish;
2187                         }
2188
2189                         if (!dbus_message_append_args(m,
2190                                                       DBUS_TYPE_UINT32, &id,
2191                                                       DBUS_TYPE_INVALID)) {
2192                                 log_error("Could not append arguments to message.");
2193                                 r = -ENOMEM;
2194                                 goto finish;
2195                         }
2196
2197                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2198                                 log_error("Failed to issue method call: %s", error.message);
2199                                 r = -EIO;
2200                                 goto finish;
2201                         }
2202                 }
2203
2204                 if (!dbus_message_get_args(reply, &error,
2205                                            DBUS_TYPE_OBJECT_PATH, &path,
2206                                            DBUS_TYPE_INVALID)) {
2207                         log_error("Failed to parse reply: %s", error.message);
2208                         r = -EIO;
2209                         goto finish;
2210                 }
2211
2212                 if ((r = show_one(bus, path, show_properties, &new_line)) < 0)
2213                         goto finish;
2214
2215                 dbus_message_unref(m);
2216                 dbus_message_unref(reply);
2217                 m = reply = NULL;
2218         }
2219
2220         r = 0;
2221
2222 finish:
2223         if (m)
2224                 dbus_message_unref(m);
2225
2226         if (reply)
2227                 dbus_message_unref(reply);
2228
2229         dbus_error_free(&error);
2230
2231         return r;
2232 }
2233
2234 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2235         DBusError error;
2236         DBusMessage *m = NULL, *reply = NULL;
2237
2238         assert(connection);
2239         assert(message);
2240
2241         dbus_error_init(&error);
2242
2243         log_debug("Got D-Bus request: %s.%s() on %s",
2244                   dbus_message_get_interface(message),
2245                   dbus_message_get_member(message),
2246                   dbus_message_get_path(message));
2247
2248         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2249                 log_error("Warning! D-Bus connection terminated.");
2250                 dbus_connection_close(connection);
2251
2252         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2253                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2254                 const char *id, *path;
2255
2256                 if (!dbus_message_get_args(message, &error,
2257                                            DBUS_TYPE_STRING, &id,
2258                                            DBUS_TYPE_OBJECT_PATH, &path,
2259                                            DBUS_TYPE_INVALID))
2260                         log_error("Failed to parse message: %s", error.message);
2261                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2262                         printf("Unit %s added.\n", id);
2263                 else
2264                         printf("Unit %s removed.\n", id);
2265
2266         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
2267                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2268                 uint32_t id;
2269                 const char *path;
2270
2271                 if (!dbus_message_get_args(message, &error,
2272                                            DBUS_TYPE_UINT32, &id,
2273                                            DBUS_TYPE_OBJECT_PATH, &path,
2274                                            DBUS_TYPE_INVALID))
2275                         log_error("Failed to parse message: %s", error.message);
2276                 else if (streq(dbus_message_get_member(message), "JobNew"))
2277                         printf("Job %u added.\n", id);
2278                 else
2279                         printf("Job %u removed.\n", id);
2280
2281
2282         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Unit", "Changed") ||
2283                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Job", "Changed")) {
2284
2285                 const char *path, *interface, *property = "Id";
2286                 DBusMessageIter iter, sub;
2287
2288                 path = dbus_message_get_path(message);
2289                 interface = dbus_message_get_interface(message);
2290
2291                 if (!(m = dbus_message_new_method_call(
2292                               "org.freedesktop.systemd1",
2293                               path,
2294                               "org.freedesktop.DBus.Properties",
2295                               "Get"))) {
2296                         log_error("Could not allocate message.");
2297                         goto oom;
2298                 }
2299
2300                 if (!dbus_message_append_args(m,
2301                                               DBUS_TYPE_STRING, &interface,
2302                                               DBUS_TYPE_STRING, &property,
2303                                               DBUS_TYPE_INVALID)) {
2304                         log_error("Could not append arguments to message.");
2305                         goto finish;
2306                 }
2307
2308                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2309                         log_error("Failed to issue method call: %s", error.message);
2310                         goto finish;
2311                 }
2312
2313                 if (!dbus_message_iter_init(reply, &iter) ||
2314                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2315                         log_error("Failed to parse reply.");
2316                         goto finish;
2317                 }
2318
2319                 dbus_message_iter_recurse(&iter, &sub);
2320
2321                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2322                         const char *id;
2323
2324                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2325                                 log_error("Failed to parse reply.");
2326                                 goto finish;
2327                         }
2328
2329                         dbus_message_iter_get_basic(&sub, &id);
2330                         printf("Unit %s changed.\n", id);
2331                 } else {
2332                         uint32_t id;
2333
2334                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2335                                 log_error("Failed to parse reply.");
2336                                 goto finish;
2337                         }
2338
2339                         dbus_message_iter_get_basic(&sub, &id);
2340                         printf("Job %u changed.\n", id);
2341                 }
2342         }
2343
2344 finish:
2345         if (m)
2346                 dbus_message_unref(m);
2347
2348         if (reply)
2349                 dbus_message_unref(reply);
2350
2351         dbus_error_free(&error);
2352         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2353
2354 oom:
2355         if (m)
2356                 dbus_message_unref(m);
2357
2358         if (reply)
2359                 dbus_message_unref(reply);
2360
2361         dbus_error_free(&error);
2362         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2363 }
2364
2365 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2366         DBusMessage *m = NULL, *reply = NULL;
2367         DBusError error;
2368         int r;
2369
2370         dbus_error_init(&error);
2371
2372         if (!private_bus) {
2373                 dbus_bus_add_match(bus,
2374                                    "type='signal',"
2375                                    "sender='org.freedesktop.systemd1',"
2376                                    "interface='org.freedesktop.systemd1.Manager',"
2377                                    "path='/org/freedesktop/systemd1'",
2378                                    &error);
2379
2380                 if (dbus_error_is_set(&error)) {
2381                         log_error("Failed to add match: %s", error.message);
2382                         r = -EIO;
2383                         goto finish;
2384                 }
2385
2386                 dbus_bus_add_match(bus,
2387                                    "type='signal',"
2388                                    "sender='org.freedesktop.systemd1',"
2389                                    "interface='org.freedesktop.systemd1.Unit',"
2390                                    "member='Changed'",
2391                                    &error);
2392
2393                 if (dbus_error_is_set(&error)) {
2394                         log_error("Failed to add match: %s", error.message);
2395                         r = -EIO;
2396                         goto finish;
2397                 }
2398
2399                 dbus_bus_add_match(bus,
2400                                    "type='signal',"
2401                                    "sender='org.freedesktop.systemd1',"
2402                                    "interface='org.freedesktop.systemd1.Job',"
2403                                    "member='Changed'",
2404                                    &error);
2405
2406                 if (dbus_error_is_set(&error)) {
2407                         log_error("Failed to add match: %s", error.message);
2408                         r = -EIO;
2409                         goto finish;
2410                 }
2411         }
2412
2413         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
2414                 log_error("Failed to add filter.");
2415                 r = -ENOMEM;
2416                 goto finish;
2417         }
2418
2419         if (!(m = dbus_message_new_method_call(
2420                               "org.freedesktop.systemd1",
2421                               "/org/freedesktop/systemd1",
2422                               "org.freedesktop.systemd1.Manager",
2423                               "Subscribe"))) {
2424                 log_error("Could not allocate message.");
2425                 r = -ENOMEM;
2426                 goto finish;
2427         }
2428
2429         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2430                 log_error("Failed to issue method call: %s", error.message);
2431                 r = -EIO;
2432                 goto finish;
2433         }
2434
2435         while (dbus_connection_read_write_dispatch(bus, -1))
2436                 ;
2437
2438         r = 0;
2439
2440 finish:
2441
2442         /* This is slightly dirty, since we don't undo the filter or the matches. */
2443
2444         if (m)
2445                 dbus_message_unref(m);
2446
2447         if (reply)
2448                 dbus_message_unref(reply);
2449
2450         dbus_error_free(&error);
2451
2452         return r;
2453 }
2454
2455 static int dump(DBusConnection *bus, char **args, unsigned n) {
2456         DBusMessage *m = NULL, *reply = NULL;
2457         DBusError error;
2458         int r;
2459         const char *text;
2460
2461         dbus_error_init(&error);
2462
2463         if (!(m = dbus_message_new_method_call(
2464                               "org.freedesktop.systemd1",
2465                               "/org/freedesktop/systemd1",
2466                               "org.freedesktop.systemd1.Manager",
2467                               "Dump"))) {
2468                 log_error("Could not allocate message.");
2469                 return -ENOMEM;
2470         }
2471
2472         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2473                 log_error("Failed to issue method call: %s", error.message);
2474                 r = -EIO;
2475                 goto finish;
2476         }
2477
2478         if (!dbus_message_get_args(reply, &error,
2479                                    DBUS_TYPE_STRING, &text,
2480                                    DBUS_TYPE_INVALID)) {
2481                 log_error("Failed to parse reply: %s", error.message);
2482                 r = -EIO;
2483                 goto finish;
2484         }
2485
2486         fputs(text, stdout);
2487
2488         r = 0;
2489
2490 finish:
2491         if (m)
2492                 dbus_message_unref(m);
2493
2494         if (reply)
2495                 dbus_message_unref(reply);
2496
2497         dbus_error_free(&error);
2498
2499         return r;
2500 }
2501
2502 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
2503         DBusMessage *m = NULL, *reply = NULL;
2504         DBusError error;
2505         int r;
2506         const char *name = "", *path, *id;
2507         dbus_bool_t cleanup = FALSE;
2508         DBusMessageIter iter, sub;
2509         const char
2510                 *interface = "org.freedesktop.systemd1.Unit",
2511                 *property = "Id";
2512
2513         dbus_error_init(&error);
2514
2515         if (!(m = dbus_message_new_method_call(
2516                               "org.freedesktop.systemd1",
2517                               "/org/freedesktop/systemd1",
2518                               "org.freedesktop.systemd1.Manager",
2519                               "CreateSnapshot"))) {
2520                 log_error("Could not allocate message.");
2521                 return -ENOMEM;
2522         }
2523
2524         if (n > 1)
2525                 name = args[1];
2526
2527         if (!dbus_message_append_args(m,
2528                                       DBUS_TYPE_STRING, &name,
2529                                       DBUS_TYPE_BOOLEAN, &cleanup,
2530                                       DBUS_TYPE_INVALID)) {
2531                 log_error("Could not append arguments to message.");
2532                 r = -ENOMEM;
2533                 goto finish;
2534         }
2535
2536         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2537                 log_error("Failed to issue method call: %s", error.message);
2538                 r = -EIO;
2539                 goto finish;
2540         }
2541
2542         if (!dbus_message_get_args(reply, &error,
2543                                    DBUS_TYPE_OBJECT_PATH, &path,
2544                                    DBUS_TYPE_INVALID)) {
2545                 log_error("Failed to parse reply: %s", error.message);
2546                 r = -EIO;
2547                 goto finish;
2548         }
2549
2550         dbus_message_unref(m);
2551         if (!(m = dbus_message_new_method_call(
2552                               "org.freedesktop.systemd1",
2553                               path,
2554                               "org.freedesktop.DBus.Properties",
2555                               "Get"))) {
2556                 log_error("Could not allocate message.");
2557                 return -ENOMEM;
2558         }
2559
2560         if (!dbus_message_append_args(m,
2561                                       DBUS_TYPE_STRING, &interface,
2562                                       DBUS_TYPE_STRING, &property,
2563                                       DBUS_TYPE_INVALID)) {
2564                 log_error("Could not append arguments to message.");
2565                 r = -ENOMEM;
2566                 goto finish;
2567         }
2568
2569         dbus_message_unref(reply);
2570         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2571                 log_error("Failed to issue method call: %s", error.message);
2572                 r = -EIO;
2573                 goto finish;
2574         }
2575
2576         if (!dbus_message_iter_init(reply, &iter) ||
2577             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2578                 log_error("Failed to parse reply.");
2579                 r = -EIO;
2580                 goto finish;
2581         }
2582
2583         dbus_message_iter_recurse(&iter, &sub);
2584
2585         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2586                 log_error("Failed to parse reply.");
2587                 r = -EIO;
2588                 goto finish;
2589         }
2590
2591         dbus_message_iter_get_basic(&sub, &id);
2592
2593         if (!arg_quiet)
2594                 puts(id);
2595         r = 0;
2596
2597 finish:
2598         if (m)
2599                 dbus_message_unref(m);
2600
2601         if (reply)
2602                 dbus_message_unref(reply);
2603
2604         dbus_error_free(&error);
2605
2606         return r;
2607 }
2608
2609 static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) {
2610         DBusMessage *m = NULL, *reply = NULL;
2611         int r;
2612         DBusError error;
2613         unsigned i;
2614
2615         assert(bus);
2616         assert(args);
2617
2618         dbus_error_init(&error);
2619
2620         for (i = 1; i < n; i++) {
2621                 const char *path = NULL;
2622
2623                 if (!(m = dbus_message_new_method_call(
2624                                       "org.freedesktop.systemd1",
2625                                       "/org/freedesktop/systemd1",
2626                                       "org.freedesktop.systemd1.Manager",
2627                                       "GetUnit"))) {
2628                         log_error("Could not allocate message.");
2629                         r = -ENOMEM;
2630                         goto finish;
2631                 }
2632
2633                 if (!dbus_message_append_args(m,
2634                                               DBUS_TYPE_STRING, &args[i],
2635                                               DBUS_TYPE_INVALID)) {
2636                         log_error("Could not append arguments to message.");
2637                         r = -ENOMEM;
2638                         goto finish;
2639                 }
2640
2641                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2642                         log_error("Failed to issue method call: %s", error.message);
2643                         r = -EIO;
2644                         goto finish;
2645                 }
2646
2647                 if (!dbus_message_get_args(reply, &error,
2648                                            DBUS_TYPE_OBJECT_PATH, &path,
2649                                            DBUS_TYPE_INVALID)) {
2650                         log_error("Failed to parse reply: %s", error.message);
2651                         r = -EIO;
2652                         goto finish;
2653                 }
2654
2655                 dbus_message_unref(m);
2656                 if (!(m = dbus_message_new_method_call(
2657                                       "org.freedesktop.systemd1",
2658                                       path,
2659                                       "org.freedesktop.systemd1.Snapshot",
2660                                       "Remove"))) {
2661                         log_error("Could not allocate message.");
2662                         r = -ENOMEM;
2663                         goto finish;
2664                 }
2665
2666                 dbus_message_unref(reply);
2667                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2668                         log_error("Failed to issue method call: %s", error.message);
2669                         r = -EIO;
2670                         goto finish;
2671                 }
2672
2673                 dbus_message_unref(m);
2674                 dbus_message_unref(reply);
2675                 m = reply = NULL;
2676         }
2677
2678         r = 0;
2679
2680 finish:
2681         if (m)
2682                 dbus_message_unref(m);
2683
2684         if (reply)
2685                 dbus_message_unref(reply);
2686
2687         dbus_error_free(&error);
2688
2689         return r;
2690 }
2691
2692 static int daemon_reload(DBusConnection *bus, char **args, unsigned n) {
2693         DBusMessage *m = NULL, *reply = NULL;
2694         DBusError error;
2695         int r;
2696         const char *method;
2697
2698         dbus_error_init(&error);
2699
2700         if (arg_action == ACTION_RELOAD)
2701                 method = "Reload";
2702         else if (arg_action == ACTION_REEXEC)
2703                 method = "Reexecute";
2704         else {
2705                 assert(arg_action == ACTION_SYSTEMCTL);
2706
2707                 method =
2708                         streq(args[0], "clear-jobs")        ||
2709                         streq(args[0], "cancel")            ? "ClearJobs" :
2710                         streq(args[0], "daemon-reexec")     ? "Reexecute" :
2711                         streq(args[0], "reset-maintenance") ? "ResetMaintenance" :
2712                         streq(args[0], "daemon-exit")       ? "Exit" :
2713                                                               "Reload";
2714         }
2715
2716         if (!(m = dbus_message_new_method_call(
2717                               "org.freedesktop.systemd1",
2718                               "/org/freedesktop/systemd1",
2719                               "org.freedesktop.systemd1.Manager",
2720                               method))) {
2721                 log_error("Could not allocate message.");
2722                 return -ENOMEM;
2723         }
2724
2725         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2726
2727                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
2728                         /* There's always a fallback possible for
2729                          * legacy actions. */
2730                         r = 0;
2731                         goto finish;
2732                 }
2733
2734                 log_error("Failed to issue method call: %s", error.message);
2735                 r = -EIO;
2736                 goto finish;
2737         }
2738
2739         r = 1;
2740
2741 finish:
2742         if (m)
2743                 dbus_message_unref(m);
2744
2745         if (reply)
2746                 dbus_message_unref(reply);
2747
2748         dbus_error_free(&error);
2749
2750         return r;
2751 }
2752
2753 static int reset_maintenance(DBusConnection *bus, char **args, unsigned n) {
2754         DBusMessage *m = NULL, *reply = NULL;
2755         unsigned i;
2756         int r;
2757         DBusError error;
2758
2759         assert(bus);
2760         dbus_error_init(&error);
2761
2762         if (n <= 1)
2763                 return daemon_reload(bus, args, n);
2764
2765         for (i = 1; i < n; i++) {
2766
2767                 if (!(m = dbus_message_new_method_call(
2768                                       "org.freedesktop.systemd1",
2769                                       "/org/freedesktop/systemd1",
2770                                       "org.freedesktop.systemd1.Manager",
2771                                       "ResetMaintenanceUnit"))) {
2772                         log_error("Could not allocate message.");
2773                         r = -ENOMEM;
2774                         goto finish;
2775                 }
2776
2777                 if (!dbus_message_append_args(m,
2778                                               DBUS_TYPE_STRING, args + i,
2779                                               DBUS_TYPE_INVALID)) {
2780                         log_error("Could not append arguments to message.");
2781                         r = -ENOMEM;
2782                         goto finish;
2783                 }
2784
2785                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2786                         log_error("Failed to issue method call: %s", error.message);
2787                         r = -EIO;
2788                         goto finish;
2789                 }
2790
2791                 dbus_message_unref(m);
2792                 dbus_message_unref(reply);
2793                 m = reply = NULL;
2794         }
2795
2796         r = 0;
2797
2798 finish:
2799         if (m)
2800                 dbus_message_unref(m);
2801
2802         if (reply)
2803                 dbus_message_unref(reply);
2804
2805         dbus_error_free(&error);
2806
2807         return r;
2808 }
2809
2810 static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
2811         DBusMessage *m = NULL, *reply = NULL;
2812         DBusError error;
2813         DBusMessageIter iter, sub, sub2;
2814         int r;
2815         const char
2816                 *interface = "org.freedesktop.systemd1.Manager",
2817                 *property = "Environment";
2818
2819         dbus_error_init(&error);
2820
2821         if (!(m = dbus_message_new_method_call(
2822                               "org.freedesktop.systemd1",
2823                               "/org/freedesktop/systemd1",
2824                               "org.freedesktop.DBus.Properties",
2825                               "Get"))) {
2826                 log_error("Could not allocate message.");
2827                 return -ENOMEM;
2828         }
2829
2830         if (!dbus_message_append_args(m,
2831                                       DBUS_TYPE_STRING, &interface,
2832                                       DBUS_TYPE_STRING, &property,
2833                                       DBUS_TYPE_INVALID)) {
2834                 log_error("Could not append arguments to message.");
2835                 r = -ENOMEM;
2836                 goto finish;
2837         }
2838
2839         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2840                 log_error("Failed to issue method call: %s", error.message);
2841                 r = -EIO;
2842                 goto finish;
2843         }
2844
2845         if (!dbus_message_iter_init(reply, &iter) ||
2846             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2847                 log_error("Failed to parse reply.");
2848                 r = -EIO;
2849                 goto finish;
2850         }
2851
2852         dbus_message_iter_recurse(&iter, &sub);
2853
2854         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
2855             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
2856                 log_error("Failed to parse reply.");
2857                 r = -EIO;
2858                 goto finish;
2859         }
2860
2861         dbus_message_iter_recurse(&sub, &sub2);
2862
2863         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
2864                 const char *text;
2865
2866                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
2867                         log_error("Failed to parse reply.");
2868                         r = -EIO;
2869                         goto finish;
2870                 }
2871
2872                 dbus_message_iter_get_basic(&sub2, &text);
2873                 printf("%s\n", text);
2874
2875                 dbus_message_iter_next(&sub2);
2876         }
2877
2878         r = 0;
2879
2880 finish:
2881         if (m)
2882                 dbus_message_unref(m);
2883
2884         if (reply)
2885                 dbus_message_unref(reply);
2886
2887         dbus_error_free(&error);
2888
2889         return r;
2890 }
2891
2892 static int set_environment(DBusConnection *bus, char **args, unsigned n) {
2893         DBusMessage *m = NULL, *reply = NULL;
2894         DBusError error;
2895         int r;
2896         const char *method;
2897         DBusMessageIter iter, sub;
2898         unsigned i;
2899
2900         dbus_error_init(&error);
2901
2902         method = streq(args[0], "set-environment")
2903                 ? "SetEnvironment"
2904                 : "UnsetEnvironment";
2905
2906         if (!(m = dbus_message_new_method_call(
2907                               "org.freedesktop.systemd1",
2908                               "/org/freedesktop/systemd1",
2909                               "org.freedesktop.systemd1.Manager",
2910                               method))) {
2911
2912                 log_error("Could not allocate message.");
2913                 return -ENOMEM;
2914         }
2915
2916         dbus_message_iter_init_append(m, &iter);
2917
2918         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
2919                 log_error("Could not append arguments to message.");
2920                 r = -ENOMEM;
2921                 goto finish;
2922         }
2923
2924         for (i = 1; i < n; i++)
2925                 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) {
2926                         log_error("Could not append arguments to message.");
2927                         r = -ENOMEM;
2928                         goto finish;
2929                 }
2930
2931         if (!dbus_message_iter_close_container(&iter, &sub)) {
2932                 log_error("Could not append arguments to message.");
2933                 r = -ENOMEM;
2934                 goto finish;
2935         }
2936
2937         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2938                 log_error("Failed to issue method call: %s", error.message);
2939                 r = -EIO;
2940                 goto finish;
2941         }
2942
2943         r = 0;
2944
2945 finish:
2946         if (m)
2947                 dbus_message_unref(m);
2948
2949         if (reply)
2950                 dbus_message_unref(reply);
2951
2952         dbus_error_free(&error);
2953
2954         return r;
2955 }
2956
2957 typedef struct {
2958         char *name;
2959         char *path;
2960
2961         char **aliases;
2962         char **wanted_by;
2963 } InstallInfo;
2964
2965 static Hashmap *will_install = NULL, *have_installed = NULL;
2966 static Set *remove_symlinks_to = NULL;
2967
2968 static void install_info_free(InstallInfo *i) {
2969         assert(i);
2970
2971         free(i->name);
2972         free(i->path);
2973         strv_free(i->aliases);
2974         strv_free(i->wanted_by);
2975         free(i);
2976 }
2977
2978 static void install_info_hashmap_free(Hashmap *m) {
2979         InstallInfo *i;
2980
2981         while ((i = hashmap_steal_first(m)))
2982                 install_info_free(i);
2983
2984         hashmap_free(m);
2985 }
2986
2987 static bool unit_name_valid(const char *name) {
2988
2989         /* This is a minimal version of unit_name_valid() from
2990          * unit-name.c */
2991
2992         if (!*name)
2993                 return false;
2994
2995         if (ignore_file(name))
2996                 return false;
2997
2998         return true;
2999 }
3000
3001 static int install_info_add(const char *name) {
3002         InstallInfo *i;
3003         int r;
3004
3005         assert(will_install);
3006
3007         if (!unit_name_valid(name))
3008                 return -EINVAL;
3009
3010         if (hashmap_get(have_installed, name) ||
3011             hashmap_get(will_install, name))
3012                 return 0;
3013
3014         if (!(i = new0(InstallInfo, 1))) {
3015                 r = -ENOMEM;
3016                 goto fail;
3017         }
3018
3019         if (!(i->name = strdup(name))) {
3020                 r = -ENOMEM;
3021                 goto fail;
3022         }
3023
3024         if ((r = hashmap_put(will_install, i->name, i)) < 0)
3025                 goto fail;
3026
3027         return 0;
3028
3029 fail:
3030         if (i)
3031                 install_info_free(i);
3032
3033         return r;
3034 }
3035
3036 static int config_parse_also(
3037                 const char *filename,
3038                 unsigned line,
3039                 const char *section,
3040                 const char *lvalue,
3041                 const char *rvalue,
3042                 void *data,
3043                 void *userdata) {
3044
3045         char *w;
3046         size_t l;
3047         char *state;
3048
3049         assert(filename);
3050         assert(lvalue);
3051         assert(rvalue);
3052
3053         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
3054                 char *n;
3055                 int r;
3056
3057                 if (!(n = strndup(w, l)))
3058                         return -ENOMEM;
3059
3060                 r = install_info_add(n);
3061                 free(n);
3062
3063                 if (r < 0)
3064                         return r;
3065         }
3066
3067         return 0;
3068 }
3069
3070 static int mark_symlink_for_removal(const char *p) {
3071         char *n;
3072         int r;
3073
3074         assert(p);
3075         assert(path_is_absolute(p));
3076
3077         if (!remove_symlinks_to)
3078                 return 0;
3079
3080         if (!(n = strdup(p)))
3081                 return -ENOMEM;
3082
3083         path_kill_slashes(n);
3084
3085         if ((r = set_put(remove_symlinks_to, n)) < 0) {
3086                 free(n);
3087                 return r == -EEXIST ? 0 : r;
3088         }
3089
3090         return 0;
3091 }
3092
3093 static int remove_marked_symlinks_fd(int fd, const char *config_path, const char *root, bool *deleted) {
3094         int r = 0;
3095         DIR *d;
3096         struct dirent *de;
3097
3098         assert(fd >= 0);
3099         assert(root);
3100         assert(deleted);
3101
3102         if (!(d = fdopendir(fd))) {
3103                 close_nointr_nofail(fd);
3104                 return -errno;
3105         }
3106
3107         rewinddir(d);
3108
3109         while ((de = readdir(d))) {
3110                 bool is_dir = false, is_link = false;
3111
3112                 if (ignore_file(de->d_name))
3113                         continue;
3114
3115                 if (de->d_type == DT_LNK)
3116                         is_link = true;
3117                 else if (de->d_type == DT_DIR)
3118                         is_dir = true;
3119                 else if (de->d_type == DT_UNKNOWN) {
3120                         struct stat st;
3121
3122                         if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
3123                                 log_error("Failed to stat %s/%s: %m", root, de->d_name);
3124
3125                                 if (r == 0)
3126                                         r = -errno;
3127                                 continue;
3128                         }
3129
3130                         is_link = S_ISLNK(st.st_mode);
3131                         is_dir = S_ISDIR(st.st_mode);
3132                 } else
3133                         continue;
3134
3135                 if (is_dir) {
3136                         int nfd, q;
3137                         char *p;
3138
3139                         if ((nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0) {
3140                                 log_error("Failed to open %s/%s: %m", root, de->d_name);
3141
3142                                 if (r == 0)
3143                                         r = -errno;
3144                                 continue;
3145                         }
3146
3147                         if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
3148                                 log_error("Failed to allocate directory string.");
3149                                 close_nointr_nofail(nfd);
3150                                 r = -ENOMEM;
3151                                 break;
3152                         }
3153
3154                         /* This will close nfd, regardless whether it succeeds or not */
3155                         q = remove_marked_symlinks_fd(nfd, config_path, p, deleted);
3156                         free(p);
3157
3158                         if (r == 0)
3159                                 r = q;
3160
3161                 } else if (is_link) {
3162                         char *p, *dest, *c;
3163                         int q;
3164
3165                         if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
3166                                 log_error("Failed to allocate symlink string.");
3167                                 r = -ENOMEM;
3168                                 break;
3169                         }
3170
3171                         if ((q = readlink_and_make_absolute(p, &dest)) < 0) {
3172                                 log_error("Cannot read symlink %s: %s", p, strerror(-q));