chiark / gitweb /
systemctl: when calling 'status' accept a PID
[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 *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 (streq_ptr(i->load_state, "failed")) {
1471                 on = ansi_highlight(true);
1472                 off = ansi_highlight(false);
1473         } else
1474                 on = off = "";
1475
1476         if (i->path)
1477                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
1478         else
1479                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
1480
1481         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1482
1483         if (streq_ptr(i->active_state, "maintenance")) {
1484                 on = ansi_highlight(true);
1485                 off = ansi_highlight(false);
1486         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1487                 on = ansi_highlight_green(true);
1488                 off = ansi_highlight_green(false);
1489         } else
1490                 on = off = "";
1491
1492         if (ss)
1493                 printf("\t  Active: %s%s (%s)%s\n",
1494                        on,
1495                        strna(i->active_state),
1496                        ss,
1497                        off);
1498         else
1499                 printf("\t  Active: %s%s%s\n",
1500                        on,
1501                        strna(i->active_state),
1502                        off);
1503
1504         if (i->sysfs_path)
1505                 printf("\t  Device: %s\n", i->sysfs_path);
1506         else if (i->where)
1507                 printf("\t   Where: %s\n", i->where);
1508         else if (i->what)
1509                 printf("\t    What: %s\n", i->what);
1510
1511         if (i->accept)
1512                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1513
1514         LIST_FOREACH(exec, p, i->exec) {
1515                 char *t;
1516
1517                 /* Only show exited processes here */
1518                 if (p->code == 0)
1519                         continue;
1520
1521                 t = strv_join(p->argv, " ");
1522                 printf("\t  Exited: %u (%s, code=%s, ", p->pid, strna(t), sigchld_code_to_string(p->code));
1523                 free(t);
1524
1525                 if (p->code == CLD_EXITED)
1526                         printf("status=%i", p->status);
1527                 else
1528                         printf("signal=%s", signal_to_string(p->status));
1529                 printf(")\n");
1530
1531                 if (i->main_pid == p->pid &&
1532                     i->start_timestamp == p->start_timestamp &&
1533                     i->exit_timestamp == p->start_timestamp)
1534                         /* Let's not show this twice */
1535                         i->main_pid = 0;
1536
1537                 if (p->pid == i->control_pid)
1538                         i->control_pid = 0;
1539         }
1540
1541         if (i->main_pid > 0 || i->control_pid > 0) {
1542                 printf("\t");
1543
1544                 if (i->main_pid > 0) {
1545                         printf("    Main: %u", (unsigned) i->main_pid);
1546
1547                         if (i->running) {
1548                                 char *t = NULL;
1549                                 get_process_name(i->main_pid, &t);
1550                                 if (t) {
1551                                         printf(" (%s)", t);
1552                                         free(t);
1553                                 }
1554                         } else if (i->exit_code > 0) {
1555                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
1556
1557                                 if (i->exit_code == CLD_EXITED)
1558                                         printf("status=%i", i->exit_status);
1559                                 else
1560                                         printf("signal=%s", signal_to_string(i->exit_status));
1561                                 printf(")");
1562                         }
1563                 }
1564
1565                 if (i->main_pid > 0 && i->control_pid > 0)
1566                         printf(";");
1567
1568                 if (i->control_pid > 0) {
1569                         char *t = NULL;
1570
1571                         printf(" Control: %u", (unsigned) i->control_pid);
1572
1573                         get_process_name(i->control_pid, &t);
1574                         if (t) {
1575                                 printf(" (%s)", t);
1576                                 free(t);
1577                         }
1578                 }
1579
1580                 printf("\n");
1581         }
1582
1583         if (i->status_text)
1584                 printf("\t  Status: \"%s\"\n", i->status_text);
1585
1586         if (i->default_control_group) {
1587                 unsigned c;
1588
1589                 printf("\t  CGroup: %s\n", i->default_control_group);
1590
1591                 if ((c = columns()) > 18)
1592                         c -= 18;
1593                 else
1594                         c = 0;
1595
1596                 show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
1597         }
1598
1599         if (i->need_daemon_reload)
1600                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
1601                        ansi_highlight(true),
1602                        ansi_highlight(false),
1603                        arg_session ? "--session" : "--system");
1604 }
1605
1606 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
1607
1608         switch (dbus_message_iter_get_arg_type(iter)) {
1609
1610         case DBUS_TYPE_STRING: {
1611                 const char *s;
1612
1613                 dbus_message_iter_get_basic(iter, &s);
1614
1615                 if (s[0]) {
1616                         if (streq(name, "Id"))
1617                                 i->id = s;
1618                         else if (streq(name, "LoadState"))
1619                                 i->load_state = s;
1620                         else if (streq(name, "ActiveState"))
1621                                 i->active_state = s;
1622                         else if (streq(name, "SubState"))
1623                                 i->sub_state = s;
1624                         else if (streq(name, "Description"))
1625                                 i->description = s;
1626                         else if (streq(name, "FragmentPath"))
1627                                 i->path = s;
1628                         else if (streq(name, "SysVPath"))
1629                                 i->path = s;
1630                         else if (streq(name, "DefaultControlGroup"))
1631                                 i->default_control_group = s;
1632                         else if (streq(name, "StatusText"))
1633                                 i->status_text = s;
1634                         else if (streq(name, "SysFSPath"))
1635                                 i->sysfs_path = s;
1636                         else if (streq(name, "Where"))
1637                                 i->where = s;
1638                         else if (streq(name, "What"))
1639                                 i->what = s;
1640                 }
1641
1642                 break;
1643         }
1644
1645         case DBUS_TYPE_BOOLEAN: {
1646                 dbus_bool_t b;
1647
1648                 dbus_message_iter_get_basic(iter, &b);
1649
1650                 if (streq(name, "Accept"))
1651                         i->accept = b;
1652                 else if (streq(name, "NeedDaemonReload"))
1653                         i->need_daemon_reload = b;
1654
1655                 break;
1656         }
1657
1658         case DBUS_TYPE_UINT32: {
1659                 uint32_t u;
1660
1661                 dbus_message_iter_get_basic(iter, &u);
1662
1663                 if (streq(name, "MainPID")) {
1664                         if (u > 0) {
1665                                 i->main_pid = (pid_t) u;
1666                                 i->running = true;
1667                         }
1668                 } else if (streq(name, "ControlPID"))
1669                         i->control_pid = (pid_t) u;
1670                 else if (streq(name, "ExecMainPID")) {
1671                         if (u > 0)
1672                                 i->main_pid = (pid_t) u;
1673                 } else if (streq(name, "NAccepted"))
1674                         i->n_accepted = u;
1675                 else if (streq(name, "NConnections"))
1676                         i->n_connections = u;
1677
1678                 break;
1679         }
1680
1681         case DBUS_TYPE_INT32: {
1682                 int32_t j;
1683
1684                 dbus_message_iter_get_basic(iter, &j);
1685
1686                 if (streq(name, "ExecMainCode"))
1687                         i->exit_code = (int) j;
1688                 else if (streq(name, "ExecMainStatus"))
1689                         i->exit_status = (int) j;
1690
1691                 break;
1692         }
1693
1694         case DBUS_TYPE_UINT64: {
1695                 uint64_t u;
1696
1697                 dbus_message_iter_get_basic(iter, &u);
1698
1699                 if (streq(name, "ExecMainStartTimestamp"))
1700                         i->start_timestamp = (usec_t) u;
1701                 else if (streq(name, "ExecMainExitTimestamp"))
1702                         i->exit_timestamp = (usec_t) u;
1703
1704                 break;
1705         }
1706
1707         case DBUS_TYPE_ARRAY: {
1708
1709                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
1710                     startswith(name, "Exec")) {
1711                         DBusMessageIter sub;
1712
1713                         dbus_message_iter_recurse(iter, &sub);
1714                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1715                                 ExecStatusInfo *info;
1716                                 int r;
1717
1718                                 if (!(info = new0(ExecStatusInfo, 1)))
1719                                         return -ENOMEM;
1720
1721                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
1722                                         free(info);
1723                                         return r;
1724                                 }
1725
1726                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
1727
1728                                 dbus_message_iter_next(&sub);
1729                         }
1730                 }
1731
1732                 break;
1733         }
1734         }
1735
1736         return 0;
1737 }
1738
1739 static int print_property(const char *name, DBusMessageIter *iter) {
1740         assert(name);
1741         assert(iter);
1742
1743         /* This is a low-level property printer, see
1744          * print_status_info() for the nicer output */
1745
1746         if (arg_property && !strv_find(arg_property, name))
1747                 return 0;
1748
1749         switch (dbus_message_iter_get_arg_type(iter)) {
1750
1751         case DBUS_TYPE_STRING: {
1752                 const char *s;
1753                 dbus_message_iter_get_basic(iter, &s);
1754
1755                 if (arg_all || s[0])
1756                         printf("%s=%s\n", name, s);
1757
1758                 return 0;
1759         }
1760
1761         case DBUS_TYPE_BOOLEAN: {
1762                 dbus_bool_t b;
1763                 dbus_message_iter_get_basic(iter, &b);
1764                 printf("%s=%s\n", name, yes_no(b));
1765
1766                 return 0;
1767         }
1768
1769         case DBUS_TYPE_UINT64: {
1770                 uint64_t u;
1771                 dbus_message_iter_get_basic(iter, &u);
1772
1773                 /* Yes, heuristics! But we can change this check
1774                  * should it turn out to not be sufficient */
1775
1776                 if (strstr(name, "Timestamp")) {
1777                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
1778
1779                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
1780                                 printf("%s=%s\n", name, strempty(t));
1781                 } else if (strstr(name, "USec")) {
1782                         char timespan[FORMAT_TIMESPAN_MAX];
1783
1784                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
1785                 } else
1786                         printf("%s=%llu\n", name, (unsigned long long) u);
1787
1788                 return 0;
1789         }
1790
1791         case DBUS_TYPE_UINT32: {
1792                 uint32_t u;
1793                 dbus_message_iter_get_basic(iter, &u);
1794
1795                 if (strstr(name, "UMask") || strstr(name, "Mode"))
1796                         printf("%s=%04o\n", name, u);
1797                 else
1798                         printf("%s=%u\n", name, (unsigned) u);
1799
1800                 return 0;
1801         }
1802
1803         case DBUS_TYPE_INT32: {
1804                 int32_t i;
1805                 dbus_message_iter_get_basic(iter, &i);
1806
1807                 printf("%s=%i\n", name, (int) i);
1808                 return 0;
1809         }
1810
1811         case DBUS_TYPE_STRUCT: {
1812                 DBusMessageIter sub;
1813                 dbus_message_iter_recurse(iter, &sub);
1814
1815                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
1816                         uint32_t u;
1817
1818                         dbus_message_iter_get_basic(&sub, &u);
1819
1820                         if (u)
1821                                 printf("%s=%u\n", name, (unsigned) u);
1822                         else if (arg_all)
1823                                 printf("%s=\n", name);
1824
1825                         return 0;
1826                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
1827                         const char *s;
1828
1829                         dbus_message_iter_get_basic(&sub, &s);
1830
1831                         if (arg_all || s[0])
1832                                 printf("%s=%s\n", name, s);
1833
1834                         return 0;
1835                 }
1836
1837                 break;
1838         }
1839
1840         case DBUS_TYPE_ARRAY:
1841
1842                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
1843                         DBusMessageIter sub;
1844                         bool space = false;
1845
1846                         dbus_message_iter_recurse(iter, &sub);
1847                         if (arg_all ||
1848                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1849                                 printf("%s=", name);
1850
1851                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1852                                         const char *s;
1853
1854                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1855                                         dbus_message_iter_get_basic(&sub, &s);
1856                                         printf("%s%s", space ? " " : "", s);
1857
1858                                         space = true;
1859                                         dbus_message_iter_next(&sub);
1860                                 }
1861
1862                                 puts("");
1863                         }
1864
1865                         return 0;
1866
1867                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
1868                         DBusMessageIter sub;
1869
1870                         dbus_message_iter_recurse(iter, &sub);
1871                         if (arg_all ||
1872                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1873                                 printf("%s=", name);
1874
1875                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1876                                         uint8_t u;
1877
1878                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
1879                                         dbus_message_iter_get_basic(&sub, &u);
1880                                         printf("%02x", u);
1881
1882                                         dbus_message_iter_next(&sub);
1883                                 }
1884
1885                                 puts("");
1886                         }
1887
1888                         return 0;
1889
1890                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
1891                         DBusMessageIter sub, sub2;
1892
1893                         dbus_message_iter_recurse(iter, &sub);
1894                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1895                                 const char *type, *path;
1896
1897                                 dbus_message_iter_recurse(&sub, &sub2);
1898
1899                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
1900                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
1901                                         printf("%s=%s\n", type, path);
1902
1903                                 dbus_message_iter_next(&sub);
1904                         }
1905
1906                         return 0;
1907
1908                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
1909                         DBusMessageIter sub, sub2;
1910
1911                         dbus_message_iter_recurse(iter, &sub);
1912                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1913                                 const char *base;
1914                                 uint64_t value, next_elapse;
1915
1916                                 dbus_message_iter_recurse(&sub, &sub2);
1917
1918                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
1919                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
1920                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
1921                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
1922
1923                                         printf("%s={ value=%s ; next_elapse=%s }\n",
1924                                                base,
1925                                                format_timespan(timespan1, sizeof(timespan1), value),
1926                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
1927                                 }
1928
1929                                 dbus_message_iter_next(&sub);
1930                         }
1931
1932                         return 0;
1933
1934                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
1935                         DBusMessageIter sub;
1936
1937                         dbus_message_iter_recurse(iter, &sub);
1938                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1939                                 ExecStatusInfo info;
1940
1941                                 zero(info);
1942                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
1943                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
1944                                         char *t;
1945
1946                                         t = strv_join(info.argv, " ");
1947
1948                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
1949                                                name,
1950                                                strna(info.path),
1951                                                strna(t),
1952                                                yes_no(info.ignore),
1953                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
1954                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
1955                                                (unsigned) info. pid,
1956                                                sigchld_code_to_string(info.code),
1957                                                info.status,
1958                                                info.code == CLD_EXITED ? "" : "/",
1959                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
1960
1961                                         free(t);
1962                                 }
1963
1964                                 free(info.path);
1965                                 strv_free(info.argv);
1966
1967                                 dbus_message_iter_next(&sub);
1968                         }
1969
1970                         return 0;
1971                 }
1972
1973                 break;
1974         }
1975
1976         if (arg_all)
1977                 printf("%s=[unprintable]\n", name);
1978
1979         return 0;
1980 }
1981
1982 static int show_one(DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
1983         DBusMessage *m = NULL, *reply = NULL;
1984         const char *interface = "";
1985         int r;
1986         DBusError error;
1987         DBusMessageIter iter, sub, sub2, sub3;
1988         UnitStatusInfo info;
1989         ExecStatusInfo *p;
1990
1991         assert(bus);
1992         assert(path);
1993         assert(new_line);
1994
1995         zero(info);
1996         dbus_error_init(&error);
1997
1998         if (!(m = dbus_message_new_method_call(
1999                               "org.freedesktop.systemd1",
2000                               path,
2001                               "org.freedesktop.DBus.Properties",
2002                               "GetAll"))) {
2003                 log_error("Could not allocate message.");
2004                 r = -ENOMEM;
2005                 goto finish;
2006         }
2007
2008         if (!dbus_message_append_args(m,
2009                                       DBUS_TYPE_STRING, &interface,
2010                                       DBUS_TYPE_INVALID)) {
2011                 log_error("Could not append arguments to message.");
2012                 r = -ENOMEM;
2013                 goto finish;
2014         }
2015
2016         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2017                 log_error("Failed to issue method call: %s", error.message);
2018                 r = -EIO;
2019                 goto finish;
2020         }
2021
2022         if (!dbus_message_iter_init(reply, &iter) ||
2023             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2024             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2025                 log_error("Failed to parse reply.");
2026                 r = -EIO;
2027                 goto finish;
2028         }
2029
2030         dbus_message_iter_recurse(&iter, &sub);
2031
2032         if (*new_line)
2033                 printf("\n");
2034
2035         *new_line = true;
2036
2037         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2038                 const char *name;
2039
2040                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2041                         log_error("Failed to parse reply.");
2042                         r = -EIO;
2043                         goto finish;
2044                 }
2045
2046                 dbus_message_iter_recurse(&sub, &sub2);
2047
2048                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2049                         log_error("Failed to parse reply.");
2050                         r = -EIO;
2051                         goto finish;
2052                 }
2053
2054                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2055                         log_error("Failed to parse reply.");
2056                         r = -EIO;
2057                         goto finish;
2058                 }
2059
2060                 dbus_message_iter_recurse(&sub2, &sub3);
2061
2062                 if (show_properties)
2063                         r = print_property(name, &sub3);
2064                 else
2065                         r = status_property(name, &sub3, &info);
2066
2067                 if (r < 0) {
2068                         log_error("Failed to parse reply.");
2069                         r = -EIO;
2070                         goto finish;
2071                 }
2072
2073                 dbus_message_iter_next(&sub);
2074         }
2075
2076         if (!show_properties)
2077                 print_status_info(&info);
2078
2079         while ((p = info.exec)) {
2080                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2081                 exec_status_info_free(p);
2082         }
2083
2084         r = 0;
2085
2086 finish:
2087         if (m)
2088                 dbus_message_unref(m);
2089
2090         if (reply)
2091                 dbus_message_unref(reply);
2092
2093         dbus_error_free(&error);
2094
2095         return r;
2096 }
2097
2098 static int show(DBusConnection *bus, char **args, unsigned n) {
2099         DBusMessage *m = NULL, *reply = NULL;
2100         int r;
2101         DBusError error;
2102         unsigned i;
2103         bool show_properties, new_line = false;
2104
2105         assert(bus);
2106         assert(args);
2107
2108         dbus_error_init(&error);
2109
2110         show_properties = !streq(args[0], "status");
2111
2112         if (show_properties && n <= 1) {
2113                 /* If not argument is specified inspect the manager
2114                  * itself */
2115
2116                 r = show_one(bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2117                 goto finish;
2118         }
2119
2120         for (i = 1; i < n; i++) {
2121                 const char *path = NULL;
2122                 uint32_t id;
2123
2124                 if (safe_atou32(args[i], &id) < 0) {
2125
2126                         /* Interpret as unit name */
2127
2128                         if (!(m = dbus_message_new_method_call(
2129                                               "org.freedesktop.systemd1",
2130                                               "/org/freedesktop/systemd1",
2131                                               "org.freedesktop.systemd1.Manager",
2132                                               "LoadUnit"))) {
2133                                 log_error("Could not allocate message.");
2134                                 r = -ENOMEM;
2135                                 goto finish;
2136                         }
2137
2138                         if (!dbus_message_append_args(m,
2139                                                       DBUS_TYPE_STRING, &args[i],
2140                                                       DBUS_TYPE_INVALID)) {
2141                                 log_error("Could not append arguments to message.");
2142                                 r = -ENOMEM;
2143                                 goto finish;
2144                         }
2145
2146                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2147
2148                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2149                                         log_error("Failed to issue method call: %s", error.message);
2150                                         r = -EIO;
2151                                         goto finish;
2152                                 }
2153
2154                                 dbus_error_free(&error);
2155
2156                                 dbus_message_unref(m);
2157                                 if (!(m = dbus_message_new_method_call(
2158                                                       "org.freedesktop.systemd1",
2159                                                       "/org/freedesktop/systemd1",
2160                                                       "org.freedesktop.systemd1.Manager",
2161                                                       "GetUnit"))) {
2162                                         log_error("Could not allocate message.");
2163                                         r = -ENOMEM;
2164                                         goto finish;
2165                                 }
2166
2167                                 if (!dbus_message_append_args(m,
2168                                                               DBUS_TYPE_STRING, &args[i],
2169                                                               DBUS_TYPE_INVALID)) {
2170                                         log_error("Could not append arguments to message.");
2171                                         r = -ENOMEM;
2172                                         goto finish;
2173                                 }
2174
2175                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2176                                         log_error("Failed to issue method call: %s", error.message);
2177                                         r = -EIO;
2178                                         goto finish;
2179                                 }
2180                         }
2181
2182                 } else if (show_properties) {
2183
2184                         /* Interpret as job id */
2185
2186                         if (!(m = dbus_message_new_method_call(
2187                                               "org.freedesktop.systemd1",
2188                                               "/org/freedesktop/systemd1",
2189                                               "org.freedesktop.systemd1.Manager",
2190                                               "GetJob"))) {
2191                                 log_error("Could not allocate message.");
2192                                 r = -ENOMEM;
2193                                 goto finish;
2194                         }
2195
2196                         if (!dbus_message_append_args(m,
2197                                                       DBUS_TYPE_UINT32, &id,
2198                                                       DBUS_TYPE_INVALID)) {
2199                                 log_error("Could not append arguments to message.");
2200                                 r = -ENOMEM;
2201                                 goto finish;
2202                         }
2203
2204                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2205                                 log_error("Failed to issue method call: %s", error.message);
2206                                 r = -EIO;
2207                                 goto finish;
2208                         }
2209                 } else {
2210
2211                         /* Interpret as PID */
2212
2213                         if (!(m = dbus_message_new_method_call(
2214                                               "org.freedesktop.systemd1",
2215                                               "/org/freedesktop/systemd1",
2216                                               "org.freedesktop.systemd1.Manager",
2217                                               "GetUnitByPID"))) {
2218                                 log_error("Could not allocate message.");
2219                                 r = -ENOMEM;
2220                                 goto finish;
2221                         }
2222
2223                         if (!dbus_message_append_args(m,
2224                                                       DBUS_TYPE_UINT32, &id,
2225                                                       DBUS_TYPE_INVALID)) {
2226                                 log_error("Could not append arguments to message.");
2227                                 r = -ENOMEM;
2228                                 goto finish;
2229                         }
2230
2231                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2232                                 log_error("Failed to issue method call: %s", error.message);
2233                                 r = -EIO;
2234                                 goto finish;
2235                         }
2236                 }
2237
2238                 if (!dbus_message_get_args(reply, &error,
2239                                            DBUS_TYPE_OBJECT_PATH, &path,
2240                                            DBUS_TYPE_INVALID)) {
2241                         log_error("Failed to parse reply: %s", error.message);
2242                         r = -EIO;
2243                         goto finish;
2244                 }
2245
2246                 if ((r = show_one(bus, path, show_properties, &new_line)) < 0)
2247                         goto finish;
2248
2249                 dbus_message_unref(m);
2250                 dbus_message_unref(reply);
2251                 m = reply = NULL;
2252         }
2253
2254         r = 0;
2255
2256 finish:
2257         if (m)
2258                 dbus_message_unref(m);
2259
2260         if (reply)
2261                 dbus_message_unref(reply);
2262
2263         dbus_error_free(&error);
2264
2265         return r;
2266 }
2267
2268 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2269         DBusError error;
2270         DBusMessage *m = NULL, *reply = NULL;
2271
2272         assert(connection);
2273         assert(message);
2274
2275         dbus_error_init(&error);
2276
2277         log_debug("Got D-Bus request: %s.%s() on %s",
2278                   dbus_message_get_interface(message),
2279                   dbus_message_get_member(message),
2280                   dbus_message_get_path(message));
2281
2282         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2283                 log_error("Warning! D-Bus connection terminated.");
2284                 dbus_connection_close(connection);
2285
2286         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2287                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2288                 const char *id, *path;
2289
2290                 if (!dbus_message_get_args(message, &error,
2291                                            DBUS_TYPE_STRING, &id,
2292                                            DBUS_TYPE_OBJECT_PATH, &path,
2293                                            DBUS_TYPE_INVALID))
2294                         log_error("Failed to parse message: %s", error.message);
2295                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2296                         printf("Unit %s added.\n", id);
2297                 else
2298                         printf("Unit %s removed.\n", id);
2299
2300         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
2301                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2302                 uint32_t id;
2303                 const char *path;
2304
2305                 if (!dbus_message_get_args(message, &error,
2306                                            DBUS_TYPE_UINT32, &id,
2307                                            DBUS_TYPE_OBJECT_PATH, &path,
2308                                            DBUS_TYPE_INVALID))
2309                         log_error("Failed to parse message: %s", error.message);
2310                 else if (streq(dbus_message_get_member(message), "JobNew"))
2311                         printf("Job %u added.\n", id);
2312                 else
2313                         printf("Job %u removed.\n", id);
2314
2315
2316         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Unit", "Changed") ||
2317                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Job", "Changed")) {
2318
2319                 const char *path, *interface, *property = "Id";
2320                 DBusMessageIter iter, sub;
2321
2322                 path = dbus_message_get_path(message);
2323                 interface = dbus_message_get_interface(message);
2324
2325                 if (!(m = dbus_message_new_method_call(
2326                               "org.freedesktop.systemd1",
2327                               path,
2328                               "org.freedesktop.DBus.Properties",
2329                               "Get"))) {
2330                         log_error("Could not allocate message.");
2331                         goto oom;
2332                 }
2333
2334                 if (!dbus_message_append_args(m,
2335                                               DBUS_TYPE_STRING, &interface,
2336                                               DBUS_TYPE_STRING, &property,
2337                                               DBUS_TYPE_INVALID)) {
2338                         log_error("Could not append arguments to message.");
2339                         goto finish;
2340                 }
2341
2342                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2343                         log_error("Failed to issue method call: %s", error.message);
2344                         goto finish;
2345                 }
2346
2347                 if (!dbus_message_iter_init(reply, &iter) ||
2348                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2349                         log_error("Failed to parse reply.");
2350                         goto finish;
2351                 }
2352
2353                 dbus_message_iter_recurse(&iter, &sub);
2354
2355                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2356                         const char *id;
2357
2358                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2359                                 log_error("Failed to parse reply.");
2360                                 goto finish;
2361                         }
2362
2363                         dbus_message_iter_get_basic(&sub, &id);
2364                         printf("Unit %s changed.\n", id);
2365                 } else {
2366                         uint32_t id;
2367
2368                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2369                                 log_error("Failed to parse reply.");
2370                                 goto finish;
2371                         }
2372
2373                         dbus_message_iter_get_basic(&sub, &id);
2374                         printf("Job %u changed.\n", id);
2375                 }
2376         }
2377
2378 finish:
2379         if (m)
2380                 dbus_message_unref(m);
2381
2382         if (reply)
2383                 dbus_message_unref(reply);
2384
2385         dbus_error_free(&error);
2386         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2387
2388 oom:
2389         if (m)
2390                 dbus_message_unref(m);
2391
2392         if (reply)
2393                 dbus_message_unref(reply);
2394
2395         dbus_error_free(&error);
2396         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2397 }
2398
2399 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2400         DBusMessage *m = NULL, *reply = NULL;
2401         DBusError error;
2402         int r;
2403
2404         dbus_error_init(&error);
2405
2406         if (!private_bus) {
2407                 dbus_bus_add_match(bus,
2408                                    "type='signal',"
2409                                    "sender='org.freedesktop.systemd1',"
2410                                    "interface='org.freedesktop.systemd1.Manager',"
2411                                    "path='/org/freedesktop/systemd1'",
2412                                    &error);
2413
2414                 if (dbus_error_is_set(&error)) {
2415                         log_error("Failed to add match: %s", error.message);
2416                         r = -EIO;
2417                         goto finish;
2418                 }
2419
2420                 dbus_bus_add_match(bus,
2421                                    "type='signal',"
2422                                    "sender='org.freedesktop.systemd1',"
2423                                    "interface='org.freedesktop.systemd1.Unit',"
2424                                    "member='Changed'",
2425                                    &error);
2426
2427                 if (dbus_error_is_set(&error)) {
2428                         log_error("Failed to add match: %s", error.message);
2429                         r = -EIO;
2430                         goto finish;
2431                 }
2432
2433                 dbus_bus_add_match(bus,
2434                                    "type='signal',"
2435                                    "sender='org.freedesktop.systemd1',"
2436                                    "interface='org.freedesktop.systemd1.Job',"
2437                                    "member='Changed'",
2438                                    &error);
2439
2440                 if (dbus_error_is_set(&error)) {
2441                         log_error("Failed to add match: %s", error.message);
2442                         r = -EIO;
2443                         goto finish;
2444                 }
2445         }
2446
2447         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
2448                 log_error("Failed to add filter.");
2449                 r = -ENOMEM;
2450                 goto finish;
2451         }
2452
2453         if (!(m = dbus_message_new_method_call(
2454                               "org.freedesktop.systemd1",
2455                               "/org/freedesktop/systemd1",
2456                               "org.freedesktop.systemd1.Manager",
2457                               "Subscribe"))) {
2458                 log_error("Could not allocate message.");
2459                 r = -ENOMEM;
2460                 goto finish;
2461         }
2462
2463         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2464                 log_error("Failed to issue method call: %s", error.message);
2465                 r = -EIO;
2466                 goto finish;
2467         }
2468
2469         while (dbus_connection_read_write_dispatch(bus, -1))
2470                 ;
2471
2472         r = 0;
2473
2474 finish:
2475
2476         /* This is slightly dirty, since we don't undo the filter or the matches. */
2477
2478         if (m)
2479                 dbus_message_unref(m);
2480
2481         if (reply)
2482                 dbus_message_unref(reply);
2483
2484         dbus_error_free(&error);
2485
2486         return r;
2487 }
2488
2489 static int dump(DBusConnection *bus, char **args, unsigned n) {
2490         DBusMessage *m = NULL, *reply = NULL;
2491         DBusError error;
2492         int r;
2493         const char *text;
2494
2495         dbus_error_init(&error);
2496
2497         if (!(m = dbus_message_new_method_call(
2498                               "org.freedesktop.systemd1",
2499                               "/org/freedesktop/systemd1",
2500                               "org.freedesktop.systemd1.Manager",
2501                               "Dump"))) {
2502                 log_error("Could not allocate message.");
2503                 return -ENOMEM;
2504         }
2505
2506         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2507                 log_error("Failed to issue method call: %s", error.message);
2508                 r = -EIO;
2509                 goto finish;
2510         }
2511
2512         if (!dbus_message_get_args(reply, &error,
2513                                    DBUS_TYPE_STRING, &text,
2514                                    DBUS_TYPE_INVALID)) {
2515                 log_error("Failed to parse reply: %s", error.message);
2516                 r = -EIO;
2517                 goto finish;
2518         }
2519
2520         fputs(text, stdout);
2521
2522         r = 0;
2523
2524 finish:
2525         if (m)
2526                 dbus_message_unref(m);
2527
2528         if (reply)
2529                 dbus_message_unref(reply);
2530
2531         dbus_error_free(&error);
2532
2533         return r;
2534 }
2535
2536 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
2537         DBusMessage *m = NULL, *reply = NULL;
2538         DBusError error;
2539         int r;
2540         const char *name = "", *path, *id;
2541         dbus_bool_t cleanup = FALSE;
2542         DBusMessageIter iter, sub;
2543         const char
2544                 *interface = "org.freedesktop.systemd1.Unit",
2545                 *property = "Id";
2546
2547         dbus_error_init(&error);
2548
2549         if (!(m = dbus_message_new_method_call(
2550                               "org.freedesktop.systemd1",
2551                               "/org/freedesktop/systemd1",
2552                               "org.freedesktop.systemd1.Manager",
2553                               "CreateSnapshot"))) {
2554                 log_error("Could not allocate message.");
2555                 return -ENOMEM;
2556         }
2557
2558         if (n > 1)
2559                 name = args[1];
2560
2561         if (!dbus_message_append_args(m,
2562                                       DBUS_TYPE_STRING, &name,
2563                                       DBUS_TYPE_BOOLEAN, &cleanup,
2564                                       DBUS_TYPE_INVALID)) {
2565                 log_error("Could not append arguments to message.");
2566                 r = -ENOMEM;
2567                 goto finish;
2568         }
2569
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_get_args(reply, &error,
2577                                    DBUS_TYPE_OBJECT_PATH, &path,
2578                                    DBUS_TYPE_INVALID)) {
2579                 log_error("Failed to parse reply: %s", error.message);
2580                 r = -EIO;
2581                 goto finish;
2582         }
2583
2584         dbus_message_unref(m);
2585         if (!(m = dbus_message_new_method_call(
2586                               "org.freedesktop.systemd1",
2587                               path,
2588                               "org.freedesktop.DBus.Properties",
2589                               "Get"))) {
2590                 log_error("Could not allocate message.");
2591                 return -ENOMEM;
2592         }
2593
2594         if (!dbus_message_append_args(m,
2595                                       DBUS_TYPE_STRING, &interface,
2596                                       DBUS_TYPE_STRING, &property,
2597                                       DBUS_TYPE_INVALID)) {
2598                 log_error("Could not append arguments to message.");
2599                 r = -ENOMEM;
2600                 goto finish;
2601         }
2602
2603         dbus_message_unref(reply);
2604         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2605                 log_error("Failed to issue method call: %s", error.message);
2606                 r = -EIO;
2607                 goto finish;
2608         }
2609
2610         if (!dbus_message_iter_init(reply, &iter) ||
2611             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2612                 log_error("Failed to parse reply.");
2613                 r = -EIO;
2614                 goto finish;
2615         }
2616
2617         dbus_message_iter_recurse(&iter, &sub);
2618
2619         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2620                 log_error("Failed to parse reply.");
2621                 r = -EIO;
2622                 goto finish;
2623         }
2624
2625         dbus_message_iter_get_basic(&sub, &id);
2626
2627         if (!arg_quiet)
2628                 puts(id);
2629         r = 0;
2630
2631 finish:
2632         if (m)
2633                 dbus_message_unref(m);
2634
2635         if (reply)
2636                 dbus_message_unref(reply);
2637
2638         dbus_error_free(&error);
2639
2640         return r;
2641 }
2642
2643 static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) {
2644         DBusMessage *m = NULL, *reply = NULL;
2645         int r;
2646         DBusError error;
2647         unsigned i;
2648
2649         assert(bus);
2650         assert(args);
2651
2652         dbus_error_init(&error);
2653
2654         for (i = 1; i < n; i++) {
2655                 const char *path = NULL;
2656
2657                 if (!(m = dbus_message_new_method_call(
2658                                       "org.freedesktop.systemd1",
2659                                       "/org/freedesktop/systemd1",
2660                                       "org.freedesktop.systemd1.Manager",
2661                                       "GetUnit"))) {
2662                         log_error("Could not allocate message.");
2663                         r = -ENOMEM;
2664                         goto finish;
2665                 }
2666
2667                 if (!dbus_message_append_args(m,
2668                                               DBUS_TYPE_STRING, &args[i],
2669                                               DBUS_TYPE_INVALID)) {
2670                         log_error("Could not append arguments to message.");
2671                         r = -ENOMEM;
2672                         goto finish;
2673                 }
2674
2675                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2676                         log_error("Failed to issue method call: %s", error.message);
2677                         r = -EIO;
2678                         goto finish;
2679                 }
2680
2681                 if (!dbus_message_get_args(reply, &error,
2682                                            DBUS_TYPE_OBJECT_PATH, &path,
2683                                            DBUS_TYPE_INVALID)) {
2684                         log_error("Failed to parse reply: %s", error.message);
2685                         r = -EIO;
2686                         goto finish;
2687                 }
2688
2689                 dbus_message_unref(m);
2690                 if (!(m = dbus_message_new_method_call(
2691                                       "org.freedesktop.systemd1",
2692                                       path,
2693                                       "org.freedesktop.systemd1.Snapshot",
2694                                       "Remove"))) {
2695                         log_error("Could not allocate message.");
2696                         r = -ENOMEM;
2697                         goto finish;
2698                 }
2699
2700                 dbus_message_unref(reply);
2701                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2702                         log_error("Failed to issue method call: %s", error.message);
2703                         r = -EIO;
2704                         goto finish;
2705                 }
2706
2707                 dbus_message_unref(m);
2708                 dbus_message_unref(reply);
2709                 m = reply = NULL;
2710         }
2711
2712         r = 0;
2713
2714 finish:
2715         if (m)
2716                 dbus_message_unref(m);
2717
2718         if (reply)
2719                 dbus_message_unref(reply);
2720
2721         dbus_error_free(&error);
2722
2723         return r;
2724 }
2725
2726 static int daemon_reload(DBusConnection *bus, char **args, unsigned n) {
2727         DBusMessage *m = NULL, *reply = NULL;
2728         DBusError error;
2729         int r;
2730         const char *method;
2731
2732         dbus_error_init(&error);
2733
2734         if (arg_action == ACTION_RELOAD)
2735                 method = "Reload";
2736         else if (arg_action == ACTION_REEXEC)
2737                 method = "Reexecute";
2738         else {
2739                 assert(arg_action == ACTION_SYSTEMCTL);
2740
2741                 method =
2742                         streq(args[0], "clear-jobs")        ||
2743                         streq(args[0], "cancel")            ? "ClearJobs" :
2744                         streq(args[0], "daemon-reexec")     ? "Reexecute" :
2745                         streq(args[0], "reset-maintenance") ? "ResetMaintenance" :
2746                         streq(args[0], "daemon-exit")       ? "Exit" :
2747                                                               "Reload";
2748         }
2749
2750         if (!(m = dbus_message_new_method_call(
2751                               "org.freedesktop.systemd1",
2752                               "/org/freedesktop/systemd1",
2753                               "org.freedesktop.systemd1.Manager",
2754                               method))) {
2755                 log_error("Could not allocate message.");
2756                 return -ENOMEM;
2757         }
2758
2759         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2760
2761                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
2762                         /* There's always a fallback possible for
2763                          * legacy actions. */
2764                         r = 0;
2765                         goto finish;
2766                 }
2767
2768                 log_error("Failed to issue method call: %s", error.message);
2769                 r = -EIO;
2770                 goto finish;
2771         }
2772
2773         r = 1;
2774
2775 finish:
2776         if (m)
2777                 dbus_message_unref(m);
2778
2779         if (reply)
2780                 dbus_message_unref(reply);
2781
2782         dbus_error_free(&error);
2783
2784         return r;
2785 }
2786
2787 static int reset_maintenance(DBusConnection *bus, char **args, unsigned n) {
2788         DBusMessage *m = NULL, *reply = NULL;
2789         unsigned i;
2790         int r;
2791         DBusError error;
2792
2793         assert(bus);
2794         dbus_error_init(&error);
2795
2796         if (n <= 1)
2797                 return daemon_reload(bus, args, n);
2798
2799         for (i = 1; i < n; i++) {
2800
2801                 if (!(m = dbus_message_new_method_call(
2802                                       "org.freedesktop.systemd1",
2803                                       "/org/freedesktop/systemd1",
2804                                       "org.freedesktop.systemd1.Manager",
2805                                       "ResetMaintenanceUnit"))) {
2806                         log_error("Could not allocate message.");
2807                         r = -ENOMEM;
2808                         goto finish;
2809                 }
2810
2811                 if (!dbus_message_append_args(m,
2812                                               DBUS_TYPE_STRING, args + i,
2813                                               DBUS_TYPE_INVALID)) {
2814                         log_error("Could not append arguments to message.");
2815                         r = -ENOMEM;
2816                         goto finish;
2817                 }
2818
2819                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2820                         log_error("Failed to issue method call: %s", error.message);
2821                         r = -EIO;
2822                         goto finish;
2823                 }
2824
2825                 dbus_message_unref(m);
2826                 dbus_message_unref(reply);
2827                 m = reply = NULL;
2828         }
2829
2830         r = 0;
2831
2832 finish:
2833         if (m)
2834                 dbus_message_unref(m);
2835
2836         if (reply)
2837                 dbus_message_unref(reply);
2838
2839         dbus_error_free(&error);
2840
2841         return r;
2842 }
2843
2844 static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
2845         DBusMessage *m = NULL, *reply = NULL;
2846         DBusError error;
2847         DBusMessageIter iter, sub, sub2;
2848         int r;
2849         const char
2850                 *interface = "org.freedesktop.systemd1.Manager",
2851                 *property = "Environment";
2852
2853         dbus_error_init(&error);
2854
2855         if (!(m = dbus_message_new_method_call(
2856                               "org.freedesktop.systemd1",
2857                               "/org/freedesktop/systemd1",
2858                               "org.freedesktop.DBus.Properties",
2859                               "Get"))) {
2860                 log_error("Could not allocate message.");
2861                 return -ENOMEM;
2862         }
2863
2864         if (!dbus_message_append_args(m,
2865                                       DBUS_TYPE_STRING, &interface,
2866                                       DBUS_TYPE_STRING, &property,
2867                                       DBUS_TYPE_INVALID)) {
2868                 log_error("Could not append arguments to message.");
2869                 r = -ENOMEM;
2870                 goto finish;
2871         }
2872
2873         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2874                 log_error("Failed to issue method call: %s", error.message);
2875                 r = -EIO;
2876                 goto finish;
2877         }
2878
2879         if (!dbus_message_iter_init(reply, &iter) ||
2880             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2881                 log_error("Failed to parse reply.");
2882                 r = -EIO;
2883                 goto finish;
2884         }
2885
2886         dbus_message_iter_recurse(&iter, &sub);
2887
2888         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
2889             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
2890                 log_error("Failed to parse reply.");
2891                 r = -EIO;
2892                 goto finish;
2893         }
2894
2895         dbus_message_iter_recurse(&sub, &sub2);
2896
2897         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
2898                 const char *text;
2899
2900                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
2901                         log_error("Failed to parse reply.");
2902                         r = -EIO;
2903                         goto finish;
2904                 }
2905
2906                 dbus_message_iter_get_basic(&sub2, &text);
2907                 printf("%s\n", text);
2908
2909                 dbus_message_iter_next(&sub2);
2910         }
2911
2912         r = 0;
2913
2914 finish:
2915         if (m)
2916                 dbus_message_unref(m);
2917
2918         if (reply)
2919                 dbus_message_unref(reply);
2920
2921         dbus_error_free(&error);
2922
2923         return r;
2924 }
2925
2926 static int set_environment(DBusConnection *bus, char **args, unsigned n) {
2927         DBusMessage *m = NULL, *reply = NULL;
2928         DBusError error;
2929         int r;
2930         const char *method;
2931         DBusMessageIter iter, sub;
2932         unsigned i;
2933
2934         dbus_error_init(&error);
2935
2936         method = streq(args[0], "set-environment")
2937                 ? "SetEnvironment"
2938                 : "UnsetEnvironment";
2939
2940         if (!(m = dbus_message_new_method_call(
2941                               "org.freedesktop.systemd1",
2942                               "/org/freedesktop/systemd1",
2943                               "org.freedesktop.systemd1.Manager",
2944                               method))) {
2945
2946                 log_error("Could not allocate message.");
2947                 return -ENOMEM;
2948         }
2949
2950         dbus_message_iter_init_append(m, &iter);
2951
2952         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
2953                 log_error("Could not append arguments to message.");
2954                 r = -ENOMEM;
2955                 goto finish;
2956         }
2957
2958         for (i = 1; i < n; i++)
2959                 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) {
2960                         log_error("Could not append arguments to message.");
2961                         r = -ENOMEM;
2962                         goto finish;
2963                 }
2964
2965         if (!dbus_message_iter_close_container(&iter, &sub)) {
2966                 log_error("Could not append arguments to message.");
2967                 r = -ENOMEM;
2968                 goto finish;
2969         }
2970
2971         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2972                 log_error("Failed to issue method call: %s", error.message);
2973                 r = -EIO;
2974                 goto finish;
2975         }
2976
2977         r = 0;
2978
2979 finish:
2980         if (m)
2981                 dbus_message_unref(m);
2982
2983         if (reply)
2984                 dbus_message_unref(reply);
2985
2986         dbus_error_free(&error);
2987
2988         return r;
2989 }
2990
2991 typedef struct {
2992         char *name;
2993         char *path;
2994
2995         char **aliases;
2996         char **wanted_by;
2997 } InstallInfo;
2998
2999 static Hashmap *will_install = NULL, *have_installed = NULL;
3000 static Set *remove_symlinks_to = NULL;
3001
3002 static void install_info_free(InstallInfo *i) {
3003         assert(i);
3004
3005         free(i->name);
3006         free(i->path);
3007         strv_free(i->aliases);
3008         strv_free(i->wanted_by);
3009         free(i);
3010 }
3011
3012 static void install_info_hashmap_free(Hashmap *m) {
3013         InstallInfo *i;
3014
3015         while ((i = hashmap_steal_first(m)))
3016                 install_info_free(i);
3017
3018         hashmap_free(m);
3019 }
3020
3021 static bool unit_name_valid(const char *name) {
3022
3023         /* This is a minimal version of unit_name_valid() from
3024          * unit-name.c */
3025
3026         if (!*name)
3027                 return false;
3028
3029         if (ignore_file(name))
3030                 return false;
3031
3032         return true;
3033 }
3034
3035 static int install_info_add(const char *name) {
3036         InstallInfo *i;
3037         int r;
3038
3039         assert(will_install);
3040
3041         if (!unit_name_valid(name))
3042                 return -EINVAL;
3043
3044         if (hashmap_get(have_installed, name) ||
3045             hashmap_get(will_install, name))
3046                 return 0;
3047
3048         if (!(i = new0(InstallInfo, 1))) {
3049                 r = -ENOMEM;
3050                 goto fail;
3051         }
3052
3053         if (!(i->name = strdup(name))) {
3054                 r = -ENOMEM;
3055                 goto fail;
3056         }
3057
3058         if ((r = hashmap_put(will_install, i->name, i)) < 0)
3059                 goto fail;
3060
3061         return 0;
3062
3063 fail:
3064         if (i)
3065                 install_info_free(i);
3066
3067         return r;
3068 }
3069
3070 static int config_parse_also(
3071                 const char *filename,
3072                 unsigned line,
3073                 const char *section,
3074                 const char *lvalue,
3075                 const char *rvalue,
3076                 void *data,
3077                 void *userdata) {
3078
3079         char *w;
3080         size_t l;
3081         char *state;
3082
3083         assert(filename);
3084         assert(lvalue);
3085         assert(rvalue);
3086
3087         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
3088                 char *n;
3089                 int r;
3090
3091                 if (!(n = strndup(w, l)))
3092                         return -ENOMEM;
3093
3094                 r = install_info_add(n);
3095                 free(n);
3096
3097                 if (r < 0)
3098                         return r;
3099         }
3100
3101         return 0;
3102 }
3103
3104 static int mark_symlink_for_removal(const char *p) {
3105         char *n;
3106         int r;
3107
3108         assert(p);
3109         assert(path_is_absolute(p));
3110
3111         if (!remove_symlinks_to)
3112                 return 0;
3113
3114         if (!(n = strdup(p)))
3115                 return -ENOMEM;
3116
3117         path_kill_slashes(n);
3118
3119         if ((r = set_put(remove_symlinks_to, n)) < 0) {
3120                 free(n);
3121                 return r == -EEXIST ? 0 : r;
3122         }
3123
3124         return 0;
3125 }
3126
3127 static int remove_marked_symlinks_fd(int fd, const char *config_path, const char *root, bool *deleted) {
3128         int r = 0;
3129         DIR *d;
3130         struct dirent *de;
3131
3132         assert(fd >= 0);
3133         assert(root);
3134         assert(deleted);
3135
3136         if (!(d = fdopendir(fd))) {
3137                 close_nointr_nofail(fd);
3138                 return -errno;
3139         }
3140
3141         rewinddir(d);
3142
3143         while ((de = readdir(d))) {
3144                 bool is_dir = false, is_link = false;
3145
3146                 if (ignore_file(de->d_name))
3147                         continue;
3148
3149                 if (de->d_type == DT_LNK)
3150                         is_link = true;
3151                 else if (de->d_type == DT_DIR)
3152                         is_dir = true;
3153                 else if (de->d_type == DT_UNKNOWN) {
3154                         struct stat st;
3155
3156                         if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
3157                                 log_error("Failed to stat %s/%s: %m", root, de->d_name);
3158
3159                                 if (r == 0)
3160                                         r = -errno;
3161                                 continue;
3162                         }
3163
3164                         is_link = S_ISLNK(st.st_mode);
3165                         is_dir = S_ISDIR(st.st_mode);
3166                 } else
3167                         continue;
3168
3169                 if (is_dir) {
3170                         int nfd, q;
3171                         char *p;