chiark / gitweb /
manager: calculate progress value while booting
[elogind.git] / src / systemctl.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4   This file is part of systemd.
5
6   Copyright 2010 Lennart Poettering
7
8   systemd is free software; you can redistribute it and/or modify it
9   under the terms of the GNU 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 #include "shutdownd.h"
53 #include "exit-status.h"
54 #include "bus-errors.h"
55 #include "build.h"
56
57 static const char *arg_type = NULL;
58 static char **arg_property = NULL;
59 static bool arg_all = false;
60 static bool arg_fail = false;
61 static bool arg_session = false;
62 static bool arg_global = false;
63 static bool arg_immediate = false;
64 static bool arg_no_block = false;
65 static bool arg_no_wtmp = false;
66 static bool arg_no_sync = false;
67 static bool arg_no_wall = false;
68 static bool arg_no_reload = false;
69 static bool arg_dry = false;
70 static bool arg_quiet = false;
71 static bool arg_full = false;
72 static bool arg_force = false;
73 static bool arg_defaults = false;
74 static char **arg_wall = NULL;
75 static usec_t arg_when = 0;
76 static enum action {
77         ACTION_INVALID,
78         ACTION_SYSTEMCTL,
79         ACTION_HALT,
80         ACTION_POWEROFF,
81         ACTION_REBOOT,
82         ACTION_RUNLEVEL2,
83         ACTION_RUNLEVEL3,
84         ACTION_RUNLEVEL4,
85         ACTION_RUNLEVEL5,
86         ACTION_RESCUE,
87         ACTION_EMERGENCY,
88         ACTION_DEFAULT,
89         ACTION_RELOAD,
90         ACTION_REEXEC,
91         ACTION_RUNLEVEL,
92         ACTION_CANCEL_SHUTDOWN,
93         _ACTION_MAX
94 } arg_action = ACTION_SYSTEMCTL;
95 static enum dot {
96         DOT_ALL,
97         DOT_ORDER,
98         DOT_REQUIRE
99 } arg_dot = DOT_ALL;
100
101 static bool private_bus = false;
102
103 static int daemon_reload(DBusConnection *bus, char **args, unsigned n);
104
105 static bool on_tty(void) {
106         static int t = -1;
107
108         if (_unlikely_(t < 0))
109                 t = isatty(STDOUT_FILENO) > 0;
110
111         return t;
112 }
113
114 static const char *ansi_highlight(bool b) {
115
116         if (!on_tty())
117                 return "";
118
119         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
120 }
121
122 static const char *ansi_highlight_green(bool b) {
123
124         if (!on_tty())
125                 return "";
126
127         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
128 }
129
130 static bool error_is_no_service(const DBusError *error) {
131         assert(error);
132
133         if (!dbus_error_is_set(error))
134                 return false;
135
136         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
137                 return true;
138
139         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
140                 return true;
141
142         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
143 }
144
145 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
146         assert(error);
147
148         if (!dbus_error_is_set(error))
149                 return r;
150
151         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
152             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
153             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
154             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
155                 return EXIT_NOPERMISSION;
156
157         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
158                 return EXIT_NOTINSTALLED;
159
160         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
161             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
162                 return EXIT_NOTIMPLEMENTED;
163
164         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
165                 return EXIT_NOTCONFIGURED;
166
167         if (r != 0)
168                 return r;
169
170         return EXIT_FAILURE;
171 }
172
173 static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
174
175         assert(iter);
176         assert(data);
177
178         if (dbus_message_iter_get_arg_type(iter) != type)
179                 return -EIO;
180
181         dbus_message_iter_get_basic(iter, data);
182
183         if (!dbus_message_iter_next(iter) != !next)
184                 return -EIO;
185
186         return 0;
187 }
188
189 static void warn_wall(enum action action) {
190         static const char *table[_ACTION_MAX] = {
191                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
192                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
193                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
194                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
195                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
196         };
197
198         if (arg_no_wall)
199                 return;
200
201         if (arg_wall) {
202                 char *p;
203
204                 if (!(p = strv_join(arg_wall, " "))) {
205                         log_error("Failed to join strings.");
206                         return;
207                 }
208
209                 if (*p) {
210                         utmp_wall(p);
211                         free(p);
212                         return;
213                 }
214
215                 free(p);
216         }
217
218         if (!table[action])
219                 return;
220
221         utmp_wall(table[action]);
222 }
223
224 struct unit_info {
225         const char *id;
226         const char *description;
227         const char *load_state;
228         const char *active_state;
229         const char *sub_state;
230         const char *following;
231         const char *unit_path;
232         uint32_t job_id;
233         const char *job_type;
234         const char *job_path;
235 };
236
237 static int compare_unit_info(const void *a, const void *b) {
238         const char *d1, *d2;
239         const struct unit_info *u = a, *v = b;
240
241         d1 = strrchr(u->id, '.');
242         d2 = strrchr(v->id, '.');
243
244         if (d1 && d2) {
245                 int r;
246
247                 if ((r = strcasecmp(d1, d2)) != 0)
248                         return r;
249         }
250
251         return strcasecmp(u->id, v->id);
252 }
253
254 static bool output_show_job(const struct unit_info *u) {
255         const char *dot;
256
257         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
258                               streq(dot+1, arg_type))) &&
259                 (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0);
260 }
261
262 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
263         unsigned active_len, sub_len, job_len;
264         const struct unit_info *u;
265
266         active_len = sizeof("ACTIVE")-1;
267         sub_len = sizeof("SUB")-1;
268         job_len = sizeof("JOB")-1;
269
270         for (u = unit_infos; u < unit_infos + c; u++) {
271                 if (!output_show_job(u))
272                         continue;
273
274                 active_len = MAX(active_len, strlen(u->active_state));
275                 sub_len = MAX(sub_len, strlen(u->sub_state));
276                 if (u->job_id != 0)
277                         job_len = MAX(job_len, strlen(u->job_type));
278         }
279
280         if (on_tty()) {
281                 printf("%-25s %-6s %-*s %-*s %-*s", "UNIT", "LOAD",
282                        active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB");
283                 if (columns() >= 80+12 || arg_full)
284                         printf(" %s\n", "DESCRIPTION");
285                 else
286                         printf("\n");
287         }
288
289         for (u = unit_infos; u < unit_infos + c; u++) {
290                 char *e;
291                 int a = 0, b = 0;
292                 const char *on_loaded, *off_loaded;
293                 const char *on_active, *off_active;
294
295                 if (!output_show_job(u))
296                         continue;
297
298                 if (!streq(u->load_state, "loaded")) {
299                         on_loaded = ansi_highlight(true);
300                         off_loaded = ansi_highlight(false);
301                 } else
302                         on_loaded = off_loaded = "";
303
304                 if (streq(u->active_state, "failed")) {
305                         on_active = ansi_highlight(true);
306                         off_active = ansi_highlight(false);
307                 } else
308                         on_active = off_active = "";
309
310                 e = arg_full ? NULL : ellipsize(u->id, 25, 33);
311
312                 printf("%-25s %s%-6s%s %s%-*s %-*s%s%n",
313                        e ? e : u->id,
314                        on_loaded, u->load_state, off_loaded,
315                        on_active, active_len, u->active_state,
316                        sub_len, u->sub_state, off_active,
317                        &a);
318
319                 free(e);
320
321                 a -= strlen(on_loaded) + strlen(off_loaded);
322                 a -= strlen(on_active) + strlen(off_active);
323
324                 if (u->job_id != 0)
325                         printf(" %-*s", job_len, u->job_type);
326                 else
327                         b = 1 + job_len;
328
329                 if (a + b + 1 < columns()) {
330                         if (u->job_id == 0)
331                                 printf(" %-*s", job_len, "");
332
333                         if (arg_full)
334                                 printf(" %s", u->description);
335                         else
336                                 printf(" %.*s", columns() - a - b - 1, u->description);
337                 }
338
339                 fputs("\n", stdout);
340         }
341
342         if (on_tty()) {
343                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
344                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
345                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
346                        "JOB    = Pending job for the unit.\n");
347
348                 if (arg_all)
349                         printf("\n%u units listed.\n", c);
350                 else
351                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", c);
352         }
353 }
354
355 static int list_units(DBusConnection *bus, char **args, unsigned n) {
356         DBusMessage *m = NULL, *reply = NULL;
357         DBusError error;
358         int r;
359         DBusMessageIter iter, sub, sub2;
360         unsigned c = 0, n_units = 0;
361         struct unit_info *unit_infos = NULL;
362
363         dbus_error_init(&error);
364
365         assert(bus);
366
367         if (!(m = dbus_message_new_method_call(
368                               "org.freedesktop.systemd1",
369                               "/org/freedesktop/systemd1",
370                               "org.freedesktop.systemd1.Manager",
371                               "ListUnits"))) {
372                 log_error("Could not allocate message.");
373                 return -ENOMEM;
374         }
375
376         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
377                 log_error("Failed to issue method call: %s", bus_error_message(&error));
378                 r = -EIO;
379                 goto finish;
380         }
381
382         if (!dbus_message_iter_init(reply, &iter) ||
383             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
384             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
385                 log_error("Failed to parse reply.");
386                 r = -EIO;
387                 goto finish;
388         }
389
390         dbus_message_iter_recurse(&iter, &sub);
391
392         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
393                 struct unit_info *u;
394
395                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
396                         log_error("Failed to parse reply.");
397                         r = -EIO;
398                         goto finish;
399                 }
400
401                 if (c >= n_units) {
402                         struct unit_info *w;
403
404                         n_units = MAX(2*c, 16);
405                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
406
407                         if (!w) {
408                                 log_error("Failed to allocate unit array.");
409                                 r = -ENOMEM;
410                                 goto finish;
411                         }
412
413                         unit_infos = w;
414                 }
415
416                 u = unit_infos+c;
417
418                 dbus_message_iter_recurse(&sub, &sub2);
419
420                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
421                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
422                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
423                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
424                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
425                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
426                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
427                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
428                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
429                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
430                         log_error("Failed to parse reply.");
431                         r = -EIO;
432                         goto finish;
433                 }
434
435                 dbus_message_iter_next(&sub);
436                 c++;
437         }
438
439         qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
440         output_units_list(unit_infos, c);
441
442         r = 0;
443
444 finish:
445         if (m)
446                 dbus_message_unref(m);
447
448         if (reply)
449                 dbus_message_unref(reply);
450
451         free(unit_infos);
452
453         dbus_error_free(&error);
454
455         return r;
456 }
457
458 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
459         static const char * const colors[] = {
460                 "Requires",              "[color=\"black\"]",
461                 "RequiresOverridable",   "[color=\"black\"]",
462                 "Requisite",             "[color=\"darkblue\"]",
463                 "RequisiteOverridable",  "[color=\"darkblue\"]",
464                 "Wants",                 "[color=\"darkgrey\"]",
465                 "Conflicts",             "[color=\"red\"]",
466                 "ConflictedBy",          "[color=\"red\"]",
467                 "After",                 "[color=\"green\"]"
468         };
469
470         const char *c = NULL;
471         unsigned i;
472
473         assert(name);
474         assert(prop);
475         assert(iter);
476
477         for (i = 0; i < ELEMENTSOF(colors); i += 2)
478                 if (streq(colors[i], prop)) {
479                         c = colors[i+1];
480                         break;
481                 }
482
483         if (!c)
484                 return 0;
485
486         if (arg_dot != DOT_ALL)
487                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
488                         return 0;
489
490         switch (dbus_message_iter_get_arg_type(iter)) {
491
492         case DBUS_TYPE_ARRAY:
493
494                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
495                         DBusMessageIter sub;
496
497                         dbus_message_iter_recurse(iter, &sub);
498
499                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
500                                 const char *s;
501
502                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
503                                 dbus_message_iter_get_basic(&sub, &s);
504                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
505
506                                 dbus_message_iter_next(&sub);
507                         }
508
509                         return 0;
510                 }
511         }
512
513         return 0;
514 }
515
516 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
517         DBusMessage *m = NULL, *reply = NULL;
518         const char *interface = "org.freedesktop.systemd1.Unit";
519         int r;
520         DBusError error;
521         DBusMessageIter iter, sub, sub2, sub3;
522
523         assert(bus);
524         assert(path);
525
526         dbus_error_init(&error);
527
528         if (!(m = dbus_message_new_method_call(
529                               "org.freedesktop.systemd1",
530                               path,
531                               "org.freedesktop.DBus.Properties",
532                               "GetAll"))) {
533                 log_error("Could not allocate message.");
534                 r = -ENOMEM;
535                 goto finish;
536         }
537
538         if (!dbus_message_append_args(m,
539                                       DBUS_TYPE_STRING, &interface,
540                                       DBUS_TYPE_INVALID)) {
541                 log_error("Could not append arguments to message.");
542                 r = -ENOMEM;
543                 goto finish;
544         }
545
546         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
547                 log_error("Failed to issue method call: %s", bus_error_message(&error));
548                 r = -EIO;
549                 goto finish;
550         }
551
552         if (!dbus_message_iter_init(reply, &iter) ||
553             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
554             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
555                 log_error("Failed to parse reply.");
556                 r = -EIO;
557                 goto finish;
558         }
559
560         dbus_message_iter_recurse(&iter, &sub);
561
562         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
563                 const char *prop;
564
565                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
566                         log_error("Failed to parse reply.");
567                         r = -EIO;
568                         goto finish;
569                 }
570
571                 dbus_message_iter_recurse(&sub, &sub2);
572
573                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
574                         log_error("Failed to parse reply.");
575                         r = -EIO;
576                         goto finish;
577                 }
578
579                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
580                         log_error("Failed to parse reply.");
581                         r = -EIO;
582                         goto finish;
583                 }
584
585                 dbus_message_iter_recurse(&sub2, &sub3);
586
587                 if (dot_one_property(name, prop, &sub3)) {
588                         log_error("Failed to parse reply.");
589                         r = -EIO;
590                         goto finish;
591                 }
592
593                 dbus_message_iter_next(&sub);
594         }
595
596         r = 0;
597
598 finish:
599         if (m)
600                 dbus_message_unref(m);
601
602         if (reply)
603                 dbus_message_unref(reply);
604
605         dbus_error_free(&error);
606
607         return r;
608 }
609
610 static int dot(DBusConnection *bus, char **args, unsigned n) {
611         DBusMessage *m = NULL, *reply = NULL;
612         DBusError error;
613         int r;
614         DBusMessageIter iter, sub, sub2;
615
616         dbus_error_init(&error);
617
618         assert(bus);
619
620         if (!(m = dbus_message_new_method_call(
621                               "org.freedesktop.systemd1",
622                               "/org/freedesktop/systemd1",
623                               "org.freedesktop.systemd1.Manager",
624                               "ListUnits"))) {
625                 log_error("Could not allocate message.");
626                 return -ENOMEM;
627         }
628
629         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
630                 log_error("Failed to issue method call: %s", bus_error_message(&error));
631                 r = -EIO;
632                 goto finish;
633         }
634
635         if (!dbus_message_iter_init(reply, &iter) ||
636             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
637             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
638                 log_error("Failed to parse reply.");
639                 r = -EIO;
640                 goto finish;
641         }
642
643         printf("digraph systemd {\n");
644
645         dbus_message_iter_recurse(&iter, &sub);
646         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
647                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
648
649                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
650                         log_error("Failed to parse reply.");
651                         r = -EIO;
652                         goto finish;
653                 }
654
655                 dbus_message_iter_recurse(&sub, &sub2);
656
657                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
658                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
659                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
660                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
661                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
662                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
663                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
664                         log_error("Failed to parse reply.");
665                         r = -EIO;
666                         goto finish;
667                 }
668
669                 if ((r = dot_one(bus, id, unit_path)) < 0)
670                         goto finish;
671
672                 /* printf("\t\"%s\";\n", id); */
673                 dbus_message_iter_next(&sub);
674         }
675
676         printf("}\n");
677
678         log_info("   Color legend: black     = Requires\n"
679                  "                 dark blue = Requisite\n"
680                  "                 dark grey = Wants\n"
681                  "                 red       = Conflicts\n"
682                  "                 green     = After\n");
683
684         if (isatty(fileno(stdout)))
685                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
686                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
687
688         r = 0;
689
690 finish:
691         if (m)
692                 dbus_message_unref(m);
693
694         if (reply)
695                 dbus_message_unref(reply);
696
697         dbus_error_free(&error);
698
699         return r;
700 }
701
702 static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
703         DBusMessage *m = NULL, *reply = NULL;
704         DBusError error;
705         int r;
706         DBusMessageIter iter, sub, sub2;
707         unsigned k = 0;
708
709         dbus_error_init(&error);
710
711         assert(bus);
712
713         if (!(m = dbus_message_new_method_call(
714                               "org.freedesktop.systemd1",
715                               "/org/freedesktop/systemd1",
716                               "org.freedesktop.systemd1.Manager",
717                               "ListJobs"))) {
718                 log_error("Could not allocate message.");
719                 return -ENOMEM;
720         }
721
722         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
723                 log_error("Failed to issue method call: %s", bus_error_message(&error));
724                 r = -EIO;
725                 goto finish;
726         }
727
728         if (!dbus_message_iter_init(reply, &iter) ||
729             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
730             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
731                 log_error("Failed to parse reply.");
732                 r = -EIO;
733                 goto finish;
734         }
735
736         dbus_message_iter_recurse(&iter, &sub);
737
738         if (isatty(STDOUT_FILENO))
739                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
740
741         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
742                 const char *name, *type, *state, *job_path, *unit_path;
743                 uint32_t id;
744                 char *e;
745
746                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
747                         log_error("Failed to parse reply.");
748                         r = -EIO;
749                         goto finish;
750                 }
751
752                 dbus_message_iter_recurse(&sub, &sub2);
753
754                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
755                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
756                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
757                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
758                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
759                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
760                         log_error("Failed to parse reply.");
761                         r = -EIO;
762                         goto finish;
763                 }
764
765                 e = arg_full ? NULL : ellipsize(name, 25, 33);
766                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
767                 free(e);
768
769                 k++;
770
771                 dbus_message_iter_next(&sub);
772         }
773
774         if (isatty(STDOUT_FILENO))
775                 printf("\n%u jobs listed.\n", k);
776
777         r = 0;
778
779 finish:
780         if (m)
781                 dbus_message_unref(m);
782
783         if (reply)
784                 dbus_message_unref(reply);
785
786         dbus_error_free(&error);
787
788         return r;
789 }
790
791 static int load_unit(DBusConnection *bus, char **args, unsigned n) {
792         DBusMessage *m = NULL, *reply = NULL;
793         DBusError error;
794         int r;
795         unsigned i;
796
797         dbus_error_init(&error);
798
799         assert(bus);
800         assert(args);
801
802         for (i = 1; i < n; i++) {
803
804                 if (!(m = dbus_message_new_method_call(
805                                       "org.freedesktop.systemd1",
806                                       "/org/freedesktop/systemd1",
807                                       "org.freedesktop.systemd1.Manager",
808                                       "LoadUnit"))) {
809                         log_error("Could not allocate message.");
810                         r = -ENOMEM;
811                         goto finish;
812                 }
813
814                 if (!dbus_message_append_args(m,
815                                               DBUS_TYPE_STRING, &args[i],
816                                               DBUS_TYPE_INVALID)) {
817                         log_error("Could not append arguments to message.");
818                         r = -ENOMEM;
819                         goto finish;
820                 }
821
822                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
823                         log_error("Failed to issue method call: %s", bus_error_message(&error));
824                         r = -EIO;
825                         goto finish;
826                 }
827
828                 dbus_message_unref(m);
829                 dbus_message_unref(reply);
830
831                 m = reply = NULL;
832         }
833
834         r = 0;
835
836 finish:
837         if (m)
838                 dbus_message_unref(m);
839
840         if (reply)
841                 dbus_message_unref(reply);
842
843         dbus_error_free(&error);
844
845         return r;
846 }
847
848 static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
849         DBusMessage *m = NULL, *reply = NULL;
850         DBusError error;
851         int r;
852         unsigned i;
853
854         dbus_error_init(&error);
855
856         assert(bus);
857         assert(args);
858
859         if (n <= 1)
860                 return daemon_reload(bus, args, n);
861
862         for (i = 1; i < n; i++) {
863                 unsigned id;
864                 const char *path;
865
866                 if (!(m = dbus_message_new_method_call(
867                                       "org.freedesktop.systemd1",
868                                       "/org/freedesktop/systemd1",
869                                       "org.freedesktop.systemd1.Manager",
870                                       "GetJob"))) {
871                         log_error("Could not allocate message.");
872                         r = -ENOMEM;
873                         goto finish;
874                 }
875
876                 if ((r = safe_atou(args[i], &id)) < 0) {
877                         log_error("Failed to parse job id: %s", strerror(-r));
878                         goto finish;
879                 }
880
881                 assert_cc(sizeof(uint32_t) == sizeof(id));
882                 if (!dbus_message_append_args(m,
883                                               DBUS_TYPE_UINT32, &id,
884                                               DBUS_TYPE_INVALID)) {
885                         log_error("Could not append arguments to message.");
886                         r = -ENOMEM;
887                         goto finish;
888                 }
889
890                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
891                         log_error("Failed to issue method call: %s", bus_error_message(&error));
892                         r = -EIO;
893                         goto finish;
894                 }
895
896                 if (!dbus_message_get_args(reply, &error,
897                                            DBUS_TYPE_OBJECT_PATH, &path,
898                                            DBUS_TYPE_INVALID)) {
899                         log_error("Failed to parse reply: %s", bus_error_message(&error));
900                         r = -EIO;
901                         goto finish;
902                 }
903
904                 dbus_message_unref(m);
905                 if (!(m = dbus_message_new_method_call(
906                                       "org.freedesktop.systemd1",
907                                       path,
908                                       "org.freedesktop.systemd1.Job",
909                                       "Cancel"))) {
910                         log_error("Could not allocate message.");
911                         r = -ENOMEM;
912                         goto finish;
913                 }
914
915                 dbus_message_unref(reply);
916                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
917                         log_error("Failed to issue method call: %s", bus_error_message(&error));
918                         r = -EIO;
919                         goto finish;
920                 }
921
922                 dbus_message_unref(m);
923                 dbus_message_unref(reply);
924                 m = reply = NULL;
925         }
926
927         r = 0;
928
929 finish:
930         if (m)
931                 dbus_message_unref(m);
932
933         if (reply)
934                 dbus_message_unref(reply);
935
936         dbus_error_free(&error);
937
938         return r;
939 }
940
941 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
942         DBusMessage *m = NULL, *reply = NULL;
943         dbus_bool_t b = FALSE;
944         DBusMessageIter iter, sub;
945         const char
946                 *interface = "org.freedesktop.systemd1.Unit",
947                 *property = "NeedDaemonReload",
948                 *path;
949
950         /* We ignore all errors here, since this is used to show a warning only */
951
952         if (!(m = dbus_message_new_method_call(
953                               "org.freedesktop.systemd1",
954                               "/org/freedesktop/systemd1",
955                               "org.freedesktop.systemd1.Manager",
956                               "GetUnit")))
957                 goto finish;
958
959         if (!dbus_message_append_args(m,
960                                       DBUS_TYPE_STRING, &unit,
961                                       DBUS_TYPE_INVALID))
962                 goto finish;
963
964         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
965                 goto finish;
966
967         if (!dbus_message_get_args(reply, NULL,
968                                    DBUS_TYPE_OBJECT_PATH, &path,
969                                    DBUS_TYPE_INVALID))
970                 goto finish;
971
972         dbus_message_unref(m);
973         if (!(m = dbus_message_new_method_call(
974                               "org.freedesktop.systemd1",
975                               path,
976                               "org.freedesktop.DBus.Properties",
977                               "Get")))
978                 goto finish;
979
980         if (!dbus_message_append_args(m,
981                                       DBUS_TYPE_STRING, &interface,
982                                       DBUS_TYPE_STRING, &property,
983                                       DBUS_TYPE_INVALID)) {
984                 goto finish;
985         }
986
987         dbus_message_unref(reply);
988         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
989                 goto finish;
990
991         if (!dbus_message_iter_init(reply, &iter) ||
992             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
993                 goto finish;
994
995         dbus_message_iter_recurse(&iter, &sub);
996
997         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
998                 goto finish;
999
1000         dbus_message_iter_get_basic(&sub, &b);
1001
1002 finish:
1003         if (m)
1004                 dbus_message_unref(m);
1005
1006         if (reply)
1007                 dbus_message_unref(reply);
1008
1009         return b;
1010 }
1011
1012 typedef struct WaitData {
1013         Set *set;
1014         bool failed;
1015 } WaitData;
1016
1017 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1018         DBusError error;
1019         WaitData *d = data;
1020
1021         assert(connection);
1022         assert(message);
1023         assert(d);
1024
1025         dbus_error_init(&error);
1026
1027         log_debug("Got D-Bus request: %s.%s() on %s",
1028                   dbus_message_get_interface(message),
1029                   dbus_message_get_member(message),
1030                   dbus_message_get_path(message));
1031
1032         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1033                 log_error("Warning! D-Bus connection terminated.");
1034                 dbus_connection_close(connection);
1035
1036         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1037                 uint32_t id;
1038                 const char *path;
1039                 dbus_bool_t success = true;
1040
1041                 if (!dbus_message_get_args(message, &error,
1042                                            DBUS_TYPE_UINT32, &id,
1043                                            DBUS_TYPE_OBJECT_PATH, &path,
1044                                            DBUS_TYPE_BOOLEAN, &success,
1045                                            DBUS_TYPE_INVALID))
1046                         log_error("Failed to parse message: %s", bus_error_message(&error));
1047                 else {
1048                         char *p;
1049
1050                         if ((p = set_remove(d->set, (char*) path)))
1051                                 free(p);
1052
1053                         if (!success)
1054                                 d->failed = true;
1055                 }
1056         }
1057
1058         dbus_error_free(&error);
1059         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1060 }
1061
1062 static int enable_wait_for_jobs(DBusConnection *bus) {
1063         DBusError error;
1064
1065         assert(bus);
1066
1067         if (private_bus)
1068                 return 0;
1069
1070         dbus_error_init(&error);
1071         dbus_bus_add_match(bus,
1072                            "type='signal',"
1073                            "sender='org.freedesktop.systemd1',"
1074                            "interface='org.freedesktop.systemd1.Manager',"
1075                            "member='JobRemoved',"
1076                            "path='/org/freedesktop/systemd1'",
1077                            &error);
1078
1079         if (dbus_error_is_set(&error)) {
1080                 log_error("Failed to add match: %s", bus_error_message(&error));
1081                 dbus_error_free(&error);
1082                 return -EIO;
1083         }
1084
1085         /* This is slightly dirty, since we don't undo the match registrations. */
1086         return 0;
1087 }
1088
1089 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1090         int r;
1091         WaitData d;
1092
1093         assert(bus);
1094         assert(s);
1095
1096         zero(d);
1097         d.set = s;
1098         d.failed = false;
1099
1100         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1101                 log_error("Failed to add filter.");
1102                 r = -ENOMEM;
1103                 goto finish;
1104         }
1105
1106         while (!set_isempty(s) &&
1107                dbus_connection_read_write_dispatch(bus, -1))
1108                 ;
1109
1110         if (!arg_quiet && d.failed)
1111                 log_error("Job failed, see system logs for details.");
1112
1113         r = d.failed ? -EIO : 0;
1114
1115 finish:
1116         /* This is slightly dirty, since we don't undo the filter registration. */
1117
1118         return r;
1119 }
1120
1121 static int start_unit_one(
1122                 DBusConnection *bus,
1123                 const char *method,
1124                 const char *name,
1125                 const char *mode,
1126                 DBusError *error,
1127                 Set *s) {
1128
1129         DBusMessage *m = NULL, *reply = NULL;
1130         const char *path;
1131         int r;
1132
1133         assert(bus);
1134         assert(method);
1135         assert(name);
1136         assert(mode);
1137         assert(error);
1138         assert(arg_no_block || s);
1139
1140         if (!(m = dbus_message_new_method_call(
1141                               "org.freedesktop.systemd1",
1142                               "/org/freedesktop/systemd1",
1143                               "org.freedesktop.systemd1.Manager",
1144                               method))) {
1145                 log_error("Could not allocate message.");
1146                 r = -ENOMEM;
1147                 goto finish;
1148         }
1149
1150         if (!dbus_message_append_args(m,
1151                                       DBUS_TYPE_STRING, &name,
1152                                       DBUS_TYPE_STRING, &mode,
1153                                       DBUS_TYPE_INVALID)) {
1154                 log_error("Could not append arguments to message.");
1155                 r = -ENOMEM;
1156                 goto finish;
1157         }
1158
1159         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1160
1161                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1162                         /* There's always a fallback possible for
1163                          * legacy actions. */
1164                         r = -EADDRNOTAVAIL;
1165                         goto finish;
1166                 }
1167
1168                 log_error("Failed to issue method call: %s", bus_error_message(error));
1169                 r = -EIO;
1170                 goto finish;
1171         }
1172
1173         if (!dbus_message_get_args(reply, error,
1174                                    DBUS_TYPE_OBJECT_PATH, &path,
1175                                    DBUS_TYPE_INVALID)) {
1176                 log_error("Failed to parse reply: %s", bus_error_message(error));
1177                 r = -EIO;
1178                 goto finish;
1179         }
1180
1181         if (need_daemon_reload(bus, name))
1182                 log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1183                             arg_session ? "--session" : "--system");
1184
1185         if (!arg_no_block) {
1186                 char *p;
1187
1188                 if (!(p = strdup(path))) {
1189                         log_error("Failed to duplicate path.");
1190                         r = -ENOMEM;
1191                         goto finish;
1192                 }
1193
1194                 if ((r = set_put(s, p)) < 0) {
1195                         free(p);
1196                         log_error("Failed to add path to set.");
1197                         goto finish;
1198                 }
1199         }
1200
1201         r = 0;
1202
1203 finish:
1204         if (m)
1205                 dbus_message_unref(m);
1206
1207         if (reply)
1208                 dbus_message_unref(reply);
1209
1210         return r;
1211 }
1212
1213 static enum action verb_to_action(const char *verb) {
1214         if (streq(verb, "halt"))
1215                 return ACTION_HALT;
1216         else if (streq(verb, "poweroff"))
1217                 return ACTION_POWEROFF;
1218         else if (streq(verb, "reboot"))
1219                 return ACTION_REBOOT;
1220         else if (streq(verb, "rescue"))
1221                 return ACTION_RESCUE;
1222         else if (streq(verb, "emergency"))
1223                 return ACTION_EMERGENCY;
1224         else if (streq(verb, "default"))
1225                 return ACTION_DEFAULT;
1226         else
1227                 return ACTION_INVALID;
1228 }
1229
1230 static int start_unit(DBusConnection *bus, char **args, unsigned n) {
1231
1232         static const char * const table[_ACTION_MAX] = {
1233                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1234                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1235                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1236                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1237                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1238                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1239                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1240                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1241                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1242                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET
1243         };
1244
1245         int r, ret = 0;
1246         unsigned i;
1247         const char *method, *mode, *one_name;
1248         Set *s = NULL;
1249         DBusError error;
1250
1251         dbus_error_init(&error);
1252
1253         assert(bus);
1254
1255         if (arg_action == ACTION_SYSTEMCTL) {
1256                 method =
1257                         streq(args[0], "stop")                  ? "StopUnit" :
1258                         streq(args[0], "reload")                ? "ReloadUnit" :
1259                         streq(args[0], "restart")               ? "RestartUnit" :
1260                         streq(args[0], "try-restart")           ||
1261                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1262                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1263                         streq(args[0], "reload-or-try-restart") ||
1264                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1265                                                                   "StartUnit";
1266
1267                 mode =
1268                         (streq(args[0], "isolate") ||
1269                          streq(args[0], "rescue")  ||
1270                          streq(args[0], "emergency")) ? "isolate" :
1271                                              arg_fail ? "fail" :
1272                                                         "replace";
1273
1274                 one_name = table[verb_to_action(args[0])];
1275
1276         } else {
1277                 assert(arg_action < ELEMENTSOF(table));
1278                 assert(table[arg_action]);
1279
1280                 method = "StartUnit";
1281
1282                 mode = (arg_action == ACTION_EMERGENCY ||
1283                         arg_action == ACTION_RESCUE ||
1284                         arg_action == ACTION_RUNLEVEL2 ||
1285                         arg_action == ACTION_RUNLEVEL3 ||
1286                         arg_action == ACTION_RUNLEVEL4 ||
1287                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1288
1289                 one_name = table[arg_action];
1290         }
1291
1292         if (!arg_no_block) {
1293                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1294                         log_error("Could not watch jobs: %s", strerror(-ret));
1295                         goto finish;
1296                 }
1297
1298                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1299                         log_error("Failed to allocate set.");
1300                         ret = -ENOMEM;
1301                         goto finish;
1302                 }
1303         }
1304
1305         if (one_name) {
1306                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1307                         goto finish;
1308         } else {
1309                 for (i = 1; i < n; i++)
1310                         if ((r = start_unit_one(bus, method, args[i], mode, &error, s)) != 0) {
1311                                 ret = translate_bus_error_to_exit_status(r, &error);
1312                                 dbus_error_free(&error);
1313                         }
1314         }
1315
1316         if (!arg_no_block)
1317                 if ((r = wait_for_jobs(bus, s)) < 0) {
1318                         ret = r;
1319                         goto finish;
1320                 }
1321
1322 finish:
1323         if (s)
1324                 set_free_free(s);
1325
1326         dbus_error_free(&error);
1327
1328         return ret;
1329 }
1330
1331 static int start_special(DBusConnection *bus, char **args, unsigned n) {
1332         int r;
1333
1334         assert(bus);
1335         assert(args);
1336
1337         r = start_unit(bus, args, n);
1338
1339         if (r >= 0)
1340                 warn_wall(verb_to_action(args[0]));
1341
1342         return r;
1343 }
1344
1345 static int check_unit(DBusConnection *bus, char **args, unsigned n) {
1346         DBusMessage *m = NULL, *reply = NULL;
1347         const char
1348                 *interface = "org.freedesktop.systemd1.Unit",
1349                 *property = "ActiveState";
1350         int r = 3; /* According to LSB: "program is not running" */
1351         DBusError error;
1352         unsigned i;
1353
1354         assert(bus);
1355         assert(args);
1356
1357         dbus_error_init(&error);
1358
1359         for (i = 1; i < n; i++) {
1360                 const char *path = NULL;
1361                 const char *state;
1362                 DBusMessageIter iter, sub;
1363
1364                 if (!(m = dbus_message_new_method_call(
1365                                       "org.freedesktop.systemd1",
1366                                       "/org/freedesktop/systemd1",
1367                                       "org.freedesktop.systemd1.Manager",
1368                                       "GetUnit"))) {
1369                         log_error("Could not allocate message.");
1370                         r = -ENOMEM;
1371                         goto finish;
1372                 }
1373
1374                 if (!dbus_message_append_args(m,
1375                                               DBUS_TYPE_STRING, &args[i],
1376                                               DBUS_TYPE_INVALID)) {
1377                         log_error("Could not append arguments to message.");
1378                         r = -ENOMEM;
1379                         goto finish;
1380                 }
1381
1382                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1383
1384                         /* Hmm, cannot figure out anything about this unit... */
1385                         if (!arg_quiet)
1386                                 puts("unknown");
1387
1388                         dbus_error_free(&error);
1389                         continue;
1390                 }
1391
1392                 if (!dbus_message_get_args(reply, &error,
1393                                            DBUS_TYPE_OBJECT_PATH, &path,
1394                                            DBUS_TYPE_INVALID)) {
1395                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1396                         r = -EIO;
1397                         goto finish;
1398                 }
1399
1400                 dbus_message_unref(m);
1401                 if (!(m = dbus_message_new_method_call(
1402                                       "org.freedesktop.systemd1",
1403                                       path,
1404                                       "org.freedesktop.DBus.Properties",
1405                                       "Get"))) {
1406                         log_error("Could not allocate message.");
1407                         r = -ENOMEM;
1408                         goto finish;
1409                 }
1410
1411                 if (!dbus_message_append_args(m,
1412                                               DBUS_TYPE_STRING, &interface,
1413                                               DBUS_TYPE_STRING, &property,
1414                                               DBUS_TYPE_INVALID)) {
1415                         log_error("Could not append arguments to message.");
1416                         r = -ENOMEM;
1417                         goto finish;
1418                 }
1419
1420                 dbus_message_unref(reply);
1421                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1422                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1423                         r = -EIO;
1424                         goto finish;
1425                 }
1426
1427                 if (!dbus_message_iter_init(reply, &iter) ||
1428                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1429                         log_error("Failed to parse reply.");
1430                         r = -EIO;
1431                         goto finish;
1432                 }
1433
1434                 dbus_message_iter_recurse(&iter, &sub);
1435
1436                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1437                         log_error("Failed to parse reply.");
1438                         r = -EIO;
1439                         goto finish;
1440                 }
1441
1442                 dbus_message_iter_get_basic(&sub, &state);
1443
1444                 if (!arg_quiet)
1445                         puts(state);
1446
1447                 if (streq(state, "active") || streq(state, "reloading"))
1448                         r = 0;
1449
1450                 dbus_message_unref(m);
1451                 dbus_message_unref(reply);
1452                 m = reply = NULL;
1453         }
1454
1455 finish:
1456         if (m)
1457                 dbus_message_unref(m);
1458
1459         if (reply)
1460                 dbus_message_unref(reply);
1461
1462         dbus_error_free(&error);
1463
1464         return r;
1465 }
1466
1467 typedef struct ExecStatusInfo {
1468         char *path;
1469         char **argv;
1470
1471         bool ignore;
1472
1473         usec_t start_timestamp;
1474         usec_t exit_timestamp;
1475         pid_t pid;
1476         int code;
1477         int status;
1478
1479         LIST_FIELDS(struct ExecStatusInfo, exec);
1480 } ExecStatusInfo;
1481
1482 static void exec_status_info_free(ExecStatusInfo *i) {
1483         assert(i);
1484
1485         free(i->path);
1486         strv_free(i->argv);
1487         free(i);
1488 }
1489
1490 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1491         uint64_t start_timestamp, exit_timestamp;
1492         DBusMessageIter sub2, sub3;
1493         const char*path;
1494         unsigned n;
1495         uint32_t pid;
1496         int32_t code, status;
1497         dbus_bool_t ignore;
1498
1499         assert(i);
1500         assert(i);
1501
1502         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1503                 return -EIO;
1504
1505         dbus_message_iter_recurse(sub, &sub2);
1506
1507         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1508                 return -EIO;
1509
1510         if (!(i->path = strdup(path)))
1511                 return -ENOMEM;
1512
1513         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1514             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1515                 return -EIO;
1516
1517         n = 0;
1518         dbus_message_iter_recurse(&sub2, &sub3);
1519         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1520                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1521                 dbus_message_iter_next(&sub3);
1522                 n++;
1523         }
1524
1525
1526         if (!(i->argv = new0(char*, n+1)))
1527                 return -ENOMEM;
1528
1529         n = 0;
1530         dbus_message_iter_recurse(&sub2, &sub3);
1531         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1532                 const char *s;
1533
1534                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1535                 dbus_message_iter_get_basic(&sub3, &s);
1536                 dbus_message_iter_next(&sub3);
1537
1538                 if (!(i->argv[n++] = strdup(s)))
1539                         return -ENOMEM;
1540         }
1541
1542         if (!dbus_message_iter_next(&sub2) ||
1543             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1544             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1545             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1546             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1547             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1548             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1549                 return -EIO;
1550
1551         i->ignore = ignore;
1552         i->start_timestamp = (usec_t) start_timestamp;
1553         i->exit_timestamp = (usec_t) exit_timestamp;
1554         i->pid = (pid_t) pid;
1555         i->code = code;
1556         i->status = status;
1557
1558         return 0;
1559 }
1560
1561 typedef struct UnitStatusInfo {
1562         const char *id;
1563         const char *load_state;
1564         const char *active_state;
1565         const char *sub_state;
1566
1567         const char *description;
1568
1569         const char *path;
1570         const char *default_control_group;
1571
1572         usec_t inactive_exit_timestamp;
1573         usec_t active_enter_timestamp;
1574         usec_t active_exit_timestamp;
1575         usec_t inactive_enter_timestamp;
1576
1577         bool need_daemon_reload;
1578
1579         /* Service */
1580         pid_t main_pid;
1581         pid_t control_pid;
1582         const char *status_text;
1583         bool running:1;
1584         bool is_sysv:1;
1585
1586         usec_t start_timestamp;
1587         usec_t exit_timestamp;
1588
1589         int exit_code, exit_status;
1590
1591         /* Socket */
1592         unsigned n_accepted;
1593         unsigned n_connections;
1594         bool accept;
1595
1596         /* Device */
1597         const char *sysfs_path;
1598
1599         /* Mount, Automount */
1600         const char *where;
1601
1602         /* Swap */
1603         const char *what;
1604
1605         LIST_HEAD(ExecStatusInfo, exec);
1606 } UnitStatusInfo;
1607
1608 static void print_status_info(UnitStatusInfo *i) {
1609         ExecStatusInfo *p;
1610         const char *on, *off, *ss;
1611         usec_t timestamp;
1612         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
1613         char since2[FORMAT_TIMESTAMP_MAX], *s2;
1614
1615         assert(i);
1616
1617         /* This shows pretty information about a unit. See
1618          * print_property() for a low-level property printer */
1619
1620         printf("%s", strna(i->id));
1621
1622         if (i->description && !streq_ptr(i->id, i->description))
1623                 printf(" - %s", i->description);
1624
1625         printf("\n");
1626
1627         if (streq_ptr(i->load_state, "failed")) {
1628                 on = ansi_highlight(true);
1629                 off = ansi_highlight(false);
1630         } else
1631                 on = off = "";
1632
1633         if (i->path)
1634                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
1635         else
1636                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
1637
1638         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1639
1640         if (streq_ptr(i->active_state, "failed")) {
1641                 on = ansi_highlight(true);
1642                 off = ansi_highlight(false);
1643         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1644                 on = ansi_highlight_green(true);
1645                 off = ansi_highlight_green(false);
1646         } else
1647                 on = off = "";
1648
1649         if (ss)
1650                 printf("\t  Active: %s%s (%s)%s",
1651                        on,
1652                        strna(i->active_state),
1653                        ss,
1654                        off);
1655         else
1656                 printf("\t  Active: %s%s%s",
1657                        on,
1658                        strna(i->active_state),
1659                        off);
1660
1661         timestamp = (streq_ptr(i->active_state, "active")      ||
1662                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
1663                     (streq_ptr(i->active_state, "inactive")    ||
1664                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
1665                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
1666                                                                   i->active_exit_timestamp;
1667
1668         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
1669         s2 = format_timestamp(since2, sizeof(since2), timestamp);
1670
1671         if (s1)
1672                 printf(" since [%s; %s]\n", s2, s1);
1673         else if (s2)
1674                 printf(" since [%s]\n", s2);
1675         else
1676                 printf("\n");
1677
1678         if (i->sysfs_path)
1679                 printf("\t  Device: %s\n", i->sysfs_path);
1680         else if (i->where)
1681                 printf("\t   Where: %s\n", i->where);
1682         else if (i->what)
1683                 printf("\t    What: %s\n", i->what);
1684
1685         if (i->accept)
1686                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1687
1688         LIST_FOREACH(exec, p, i->exec) {
1689                 char *t;
1690
1691                 /* Only show exited processes here */
1692                 if (p->code == 0)
1693                         continue;
1694
1695                 t = strv_join(p->argv, " ");
1696                 printf("\t Process: %u (%s, code=%s, ", p->pid, strna(t), sigchld_code_to_string(p->code));
1697                 free(t);
1698
1699                 if (p->code == CLD_EXITED) {
1700                         const char *c;
1701
1702                         printf("status=%i", p->status);
1703
1704                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1705                                 printf("/%s", c);
1706
1707                 } else
1708                         printf("signal=%s", signal_to_string(p->status));
1709                 printf(")\n");
1710
1711                 if (i->main_pid == p->pid &&
1712                     i->start_timestamp == p->start_timestamp &&
1713                     i->exit_timestamp == p->start_timestamp)
1714                         /* Let's not show this twice */
1715                         i->main_pid = 0;
1716
1717                 if (p->pid == i->control_pid)
1718                         i->control_pid = 0;
1719         }
1720
1721         if (i->main_pid > 0 || i->control_pid > 0) {
1722                 printf("\t");
1723
1724                 if (i->main_pid > 0) {
1725                         printf("Main PID: %u", (unsigned) i->main_pid);
1726
1727                         if (i->running) {
1728                                 char *t = NULL;
1729                                 get_process_name(i->main_pid, &t);
1730                                 if (t) {
1731                                         printf(" (%s)", t);
1732                                         free(t);
1733                                 }
1734                         } else if (i->exit_code > 0) {
1735                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
1736
1737                                 if (i->exit_code == CLD_EXITED) {
1738                                         const char *c;
1739
1740                                         printf("status=%i", i->exit_status);
1741
1742                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1743                                                 printf("/%s", c);
1744
1745                                 } else
1746                                         printf("signal=%s", signal_to_string(i->exit_status));
1747                                 printf(")");
1748                         }
1749                 }
1750
1751                 if (i->main_pid > 0 && i->control_pid > 0)
1752                         printf(";");
1753
1754                 if (i->control_pid > 0) {
1755                         char *t = NULL;
1756
1757                         printf(" Control: %u", (unsigned) i->control_pid);
1758
1759                         get_process_name(i->control_pid, &t);
1760                         if (t) {
1761                                 printf(" (%s)", t);
1762                                 free(t);
1763                         }
1764                 }
1765
1766                 printf("\n");
1767         }
1768
1769         if (i->status_text)
1770                 printf("\t  Status: \"%s\"\n", i->status_text);
1771
1772         if (i->default_control_group) {
1773                 unsigned c;
1774
1775                 printf("\t  CGroup: %s\n", i->default_control_group);
1776
1777                 if ((c = columns()) > 18)
1778                         c -= 18;
1779                 else
1780                         c = 0;
1781
1782                 show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
1783         }
1784
1785         if (i->need_daemon_reload)
1786                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
1787                        ansi_highlight(true),
1788                        ansi_highlight(false),
1789                        arg_session ? "--session" : "--system");
1790 }
1791
1792 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
1793
1794         switch (dbus_message_iter_get_arg_type(iter)) {
1795
1796         case DBUS_TYPE_STRING: {
1797                 const char *s;
1798
1799                 dbus_message_iter_get_basic(iter, &s);
1800
1801                 if (s[0]) {
1802                         if (streq(name, "Id"))
1803                                 i->id = s;
1804                         else if (streq(name, "LoadState"))
1805                                 i->load_state = s;
1806                         else if (streq(name, "ActiveState"))
1807                                 i->active_state = s;
1808                         else if (streq(name, "SubState"))
1809                                 i->sub_state = s;
1810                         else if (streq(name, "Description"))
1811                                 i->description = s;
1812                         else if (streq(name, "FragmentPath"))
1813                                 i->path = s;
1814                         else if (streq(name, "SysVPath")) {
1815                                 i->is_sysv = true;
1816                                 i->path = s;
1817                         } else if (streq(name, "DefaultControlGroup"))
1818                                 i->default_control_group = s;
1819                         else if (streq(name, "StatusText"))
1820                                 i->status_text = s;
1821                         else if (streq(name, "SysFSPath"))
1822                                 i->sysfs_path = s;
1823                         else if (streq(name, "Where"))
1824                                 i->where = s;
1825                         else if (streq(name, "What"))
1826                                 i->what = s;
1827                 }
1828
1829                 break;
1830         }
1831
1832         case DBUS_TYPE_BOOLEAN: {
1833                 dbus_bool_t b;
1834
1835                 dbus_message_iter_get_basic(iter, &b);
1836
1837                 if (streq(name, "Accept"))
1838                         i->accept = b;
1839                 else if (streq(name, "NeedDaemonReload"))
1840                         i->need_daemon_reload = b;
1841
1842                 break;
1843         }
1844
1845         case DBUS_TYPE_UINT32: {
1846                 uint32_t u;
1847
1848                 dbus_message_iter_get_basic(iter, &u);
1849
1850                 if (streq(name, "MainPID")) {
1851                         if (u > 0) {
1852                                 i->main_pid = (pid_t) u;
1853                                 i->running = true;
1854                         }
1855                 } else if (streq(name, "ControlPID"))
1856                         i->control_pid = (pid_t) u;
1857                 else if (streq(name, "ExecMainPID")) {
1858                         if (u > 0)
1859                                 i->main_pid = (pid_t) u;
1860                 } else if (streq(name, "NAccepted"))
1861                         i->n_accepted = u;
1862                 else if (streq(name, "NConnections"))
1863                         i->n_connections = u;
1864
1865                 break;
1866         }
1867
1868         case DBUS_TYPE_INT32: {
1869                 int32_t j;
1870
1871                 dbus_message_iter_get_basic(iter, &j);
1872
1873                 if (streq(name, "ExecMainCode"))
1874                         i->exit_code = (int) j;
1875                 else if (streq(name, "ExecMainStatus"))
1876                         i->exit_status = (int) j;
1877
1878                 break;
1879         }
1880
1881         case DBUS_TYPE_UINT64: {
1882                 uint64_t u;
1883
1884                 dbus_message_iter_get_basic(iter, &u);
1885
1886                 if (streq(name, "ExecMainStartTimestamp"))
1887                         i->start_timestamp = (usec_t) u;
1888                 else if (streq(name, "ExecMainExitTimestamp"))
1889                         i->exit_timestamp = (usec_t) u;
1890                 else if (streq(name, "ActiveEnterTimestamp"))
1891                         i->active_enter_timestamp = (usec_t) u;
1892                 else if (streq(name, "InactiveEnterTimestamp"))
1893                         i->inactive_enter_timestamp = (usec_t) u;
1894                 else if (streq(name, "InactiveExitTimestamp"))
1895                         i->inactive_exit_timestamp = (usec_t) u;
1896                 else if (streq(name, "ActiveExitTimestamp"))
1897                         i->active_exit_timestamp = (usec_t) u;
1898
1899                 break;
1900         }
1901
1902         case DBUS_TYPE_ARRAY: {
1903
1904                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
1905                     startswith(name, "Exec")) {
1906                         DBusMessageIter sub;
1907
1908                         dbus_message_iter_recurse(iter, &sub);
1909                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1910                                 ExecStatusInfo *info;
1911                                 int r;
1912
1913                                 if (!(info = new0(ExecStatusInfo, 1)))
1914                                         return -ENOMEM;
1915
1916                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
1917                                         free(info);
1918                                         return r;
1919                                 }
1920
1921                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
1922
1923                                 dbus_message_iter_next(&sub);
1924                         }
1925                 }
1926
1927                 break;
1928         }
1929         }
1930
1931         return 0;
1932 }
1933
1934 static int print_property(const char *name, DBusMessageIter *iter) {
1935         assert(name);
1936         assert(iter);
1937
1938         /* This is a low-level property printer, see
1939          * print_status_info() for the nicer output */
1940
1941         if (arg_property && !strv_find(arg_property, name))
1942                 return 0;
1943
1944         switch (dbus_message_iter_get_arg_type(iter)) {
1945
1946         case DBUS_TYPE_STRING: {
1947                 const char *s;
1948                 dbus_message_iter_get_basic(iter, &s);
1949
1950                 if (arg_all || s[0])
1951                         printf("%s=%s\n", name, s);
1952
1953                 return 0;
1954         }
1955
1956         case DBUS_TYPE_BOOLEAN: {
1957                 dbus_bool_t b;
1958                 dbus_message_iter_get_basic(iter, &b);
1959                 printf("%s=%s\n", name, yes_no(b));
1960
1961                 return 0;
1962         }
1963
1964         case DBUS_TYPE_UINT64: {
1965                 uint64_t u;
1966                 dbus_message_iter_get_basic(iter, &u);
1967
1968                 /* Yes, heuristics! But we can change this check
1969                  * should it turn out to not be sufficient */
1970
1971                 if (strstr(name, "Timestamp")) {
1972                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
1973
1974                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
1975                                 printf("%s=%s\n", name, strempty(t));
1976                 } else if (strstr(name, "USec")) {
1977                         char timespan[FORMAT_TIMESPAN_MAX];
1978
1979                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
1980                 } else
1981                         printf("%s=%llu\n", name, (unsigned long long) u);
1982
1983                 return 0;
1984         }
1985
1986         case DBUS_TYPE_UINT32: {
1987                 uint32_t u;
1988                 dbus_message_iter_get_basic(iter, &u);
1989
1990                 if (strstr(name, "UMask") || strstr(name, "Mode"))
1991                         printf("%s=%04o\n", name, u);
1992                 else
1993                         printf("%s=%u\n", name, (unsigned) u);
1994
1995                 return 0;
1996         }
1997
1998         case DBUS_TYPE_INT32: {
1999                 int32_t i;
2000                 dbus_message_iter_get_basic(iter, &i);
2001
2002                 printf("%s=%i\n", name, (int) i);
2003                 return 0;
2004         }
2005
2006         case DBUS_TYPE_DOUBLE: {
2007                 double d;
2008                 dbus_message_iter_get_basic(iter, &d);
2009
2010                 printf("%s=%g\n", name, d);
2011                 return 0;
2012         }
2013
2014         case DBUS_TYPE_STRUCT: {
2015                 DBusMessageIter sub;
2016                 dbus_message_iter_recurse(iter, &sub);
2017
2018                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2019                         uint32_t u;
2020
2021                         dbus_message_iter_get_basic(&sub, &u);
2022
2023                         if (u)
2024                                 printf("%s=%u\n", name, (unsigned) u);
2025                         else if (arg_all)
2026                                 printf("%s=\n", name);
2027
2028                         return 0;
2029                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2030                         const char *s;
2031
2032                         dbus_message_iter_get_basic(&sub, &s);
2033
2034                         if (arg_all || s[0])
2035                                 printf("%s=%s\n", name, s);
2036
2037                         return 0;
2038                 }
2039
2040                 break;
2041         }
2042
2043         case DBUS_TYPE_ARRAY:
2044
2045                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
2046                         DBusMessageIter sub;
2047                         bool space = false;
2048
2049                         dbus_message_iter_recurse(iter, &sub);
2050                         if (arg_all ||
2051                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2052                                 printf("%s=", name);
2053
2054                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2055                                         const char *s;
2056
2057                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
2058                                         dbus_message_iter_get_basic(&sub, &s);
2059                                         printf("%s%s", space ? " " : "", s);
2060
2061                                         space = true;
2062                                         dbus_message_iter_next(&sub);
2063                                 }
2064
2065                                 puts("");
2066                         }
2067
2068                         return 0;
2069
2070                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
2071                         DBusMessageIter sub;
2072
2073                         dbus_message_iter_recurse(iter, &sub);
2074                         if (arg_all ||
2075                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2076                                 printf("%s=", name);
2077
2078                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2079                                         uint8_t u;
2080
2081                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
2082                                         dbus_message_iter_get_basic(&sub, &u);
2083                                         printf("%02x", u);
2084
2085                                         dbus_message_iter_next(&sub);
2086                                 }
2087
2088                                 puts("");
2089                         }
2090
2091                         return 0;
2092
2093                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2094                         DBusMessageIter sub, sub2;
2095
2096                         dbus_message_iter_recurse(iter, &sub);
2097                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2098                                 const char *type, *path;
2099
2100                                 dbus_message_iter_recurse(&sub, &sub2);
2101
2102                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2103                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2104                                         printf("%s=%s\n", type, path);
2105
2106                                 dbus_message_iter_next(&sub);
2107                         }
2108
2109                         return 0;
2110
2111                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2112                         DBusMessageIter sub, sub2;
2113
2114                         dbus_message_iter_recurse(iter, &sub);
2115                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2116                                 const char *base;
2117                                 uint64_t value, next_elapse;
2118
2119                                 dbus_message_iter_recurse(&sub, &sub2);
2120
2121                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2122                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2123                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2124                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2125
2126                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2127                                                base,
2128                                                format_timespan(timespan1, sizeof(timespan1), value),
2129                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2130                                 }
2131
2132                                 dbus_message_iter_next(&sub);
2133                         }
2134
2135                         return 0;
2136
2137                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2138                         DBusMessageIter sub;
2139
2140                         dbus_message_iter_recurse(iter, &sub);
2141                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2142                                 ExecStatusInfo info;
2143
2144                                 zero(info);
2145                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2146                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2147                                         char *t;
2148
2149                                         t = strv_join(info.argv, " ");
2150
2151                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2152                                                name,
2153                                                strna(info.path),
2154                                                strna(t),
2155                                                yes_no(info.ignore),
2156                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2157                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2158                                                (unsigned) info. pid,
2159                                                sigchld_code_to_string(info.code),
2160                                                info.status,
2161                                                info.code == CLD_EXITED ? "" : "/",
2162                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2163
2164                                         free(t);
2165                                 }
2166
2167                                 free(info.path);
2168                                 strv_free(info.argv);
2169
2170                                 dbus_message_iter_next(&sub);
2171                         }
2172
2173                         return 0;
2174                 }
2175
2176                 break;
2177         }
2178
2179         if (arg_all)
2180                 printf("%s=[unprintable]\n", name);
2181
2182         return 0;
2183 }
2184
2185 static int show_one(DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2186         DBusMessage *m = NULL, *reply = NULL;
2187         const char *interface = "";
2188         int r;
2189         DBusError error;
2190         DBusMessageIter iter, sub, sub2, sub3;
2191         UnitStatusInfo info;
2192         ExecStatusInfo *p;
2193
2194         assert(bus);
2195         assert(path);
2196         assert(new_line);
2197
2198         zero(info);
2199         dbus_error_init(&error);
2200
2201         if (!(m = dbus_message_new_method_call(
2202                               "org.freedesktop.systemd1",
2203                               path,
2204                               "org.freedesktop.DBus.Properties",
2205                               "GetAll"))) {
2206                 log_error("Could not allocate message.");
2207                 r = -ENOMEM;
2208                 goto finish;
2209         }
2210
2211         if (!dbus_message_append_args(m,
2212                                       DBUS_TYPE_STRING, &interface,
2213                                       DBUS_TYPE_INVALID)) {
2214                 log_error("Could not append arguments to message.");
2215                 r = -ENOMEM;
2216                 goto finish;
2217         }
2218
2219         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2220                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2221                 r = -EIO;
2222                 goto finish;
2223         }
2224
2225         if (!dbus_message_iter_init(reply, &iter) ||
2226             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2227             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2228                 log_error("Failed to parse reply.");
2229                 r = -EIO;
2230                 goto finish;
2231         }
2232
2233         dbus_message_iter_recurse(&iter, &sub);
2234
2235         if (*new_line)
2236                 printf("\n");
2237
2238         *new_line = true;
2239
2240         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2241                 const char *name;
2242
2243                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2244                         log_error("Failed to parse reply.");
2245                         r = -EIO;
2246                         goto finish;
2247                 }
2248
2249                 dbus_message_iter_recurse(&sub, &sub2);
2250
2251                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2252                         log_error("Failed to parse reply.");
2253                         r = -EIO;
2254                         goto finish;
2255                 }
2256
2257                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2258                         log_error("Failed to parse reply.");
2259                         r = -EIO;
2260                         goto finish;
2261                 }
2262
2263                 dbus_message_iter_recurse(&sub2, &sub3);
2264
2265                 if (show_properties)
2266                         r = print_property(name, &sub3);
2267                 else
2268                         r = status_property(name, &sub3, &info);
2269
2270                 if (r < 0) {
2271                         log_error("Failed to parse reply.");
2272                         r = -EIO;
2273                         goto finish;
2274                 }
2275
2276                 dbus_message_iter_next(&sub);
2277         }
2278
2279         r = 0;
2280
2281         if (!show_properties)
2282                 print_status_info(&info);
2283
2284         if (!streq_ptr(info.active_state, "active") &&
2285             !streq_ptr(info.active_state, "reloading"))
2286                 /* According to LSB: "program not running" */
2287                 r = 3;
2288
2289         while ((p = info.exec)) {
2290                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2291                 exec_status_info_free(p);
2292         }
2293
2294 finish:
2295         if (m)
2296                 dbus_message_unref(m);
2297
2298         if (reply)
2299                 dbus_message_unref(reply);
2300
2301         dbus_error_free(&error);
2302
2303         return r;
2304 }
2305
2306 static int show(DBusConnection *bus, char **args, unsigned n) {
2307         DBusMessage *m = NULL, *reply = NULL;
2308         int r, ret = 0;
2309         DBusError error;
2310         unsigned i;
2311         bool show_properties, new_line = false;
2312
2313         assert(bus);
2314         assert(args);
2315
2316         dbus_error_init(&error);
2317
2318         show_properties = !streq(args[0], "status");
2319
2320         if (show_properties && n <= 1) {
2321                 /* If not argument is specified inspect the manager
2322                  * itself */
2323
2324                 ret = show_one(bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2325                 goto finish;
2326         }
2327
2328         for (i = 1; i < n; i++) {
2329                 const char *path = NULL;
2330                 uint32_t id;
2331
2332                 if (safe_atou32(args[i], &id) < 0) {
2333
2334                         /* Interpret as unit name */
2335
2336                         if (!(m = dbus_message_new_method_call(
2337                                               "org.freedesktop.systemd1",
2338                                               "/org/freedesktop/systemd1",
2339                                               "org.freedesktop.systemd1.Manager",
2340                                               "LoadUnit"))) {
2341                                 log_error("Could not allocate message.");
2342                                 ret = -ENOMEM;
2343                                 goto finish;
2344                         }
2345
2346                         if (!dbus_message_append_args(m,
2347                                                       DBUS_TYPE_STRING, &args[i],
2348                                                       DBUS_TYPE_INVALID)) {
2349                                 log_error("Could not append arguments to message.");
2350                                 ret = -ENOMEM;
2351                                 goto finish;
2352                         }
2353
2354                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2355
2356                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2357                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2358                                         ret = -EIO;
2359                                         goto finish;
2360                                 }
2361
2362                                 dbus_error_free(&error);
2363
2364                                 dbus_message_unref(m);
2365                                 if (!(m = dbus_message_new_method_call(
2366                                                       "org.freedesktop.systemd1",
2367                                                       "/org/freedesktop/systemd1",
2368                                                       "org.freedesktop.systemd1.Manager",
2369                                                       "GetUnit"))) {
2370                                         log_error("Could not allocate message.");
2371                                         ret = -ENOMEM;
2372                                         goto finish;
2373                                 }
2374
2375                                 if (!dbus_message_append_args(m,
2376                                                               DBUS_TYPE_STRING, &args[i],
2377                                                               DBUS_TYPE_INVALID)) {
2378                                         log_error("Could not append arguments to message.");
2379                                         ret = -ENOMEM;
2380                                         goto finish;
2381                                 }
2382
2383                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2384                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2385
2386                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2387                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2388                                         else
2389                                                 ret = -EIO;
2390                                         goto finish;
2391                                 }
2392                         }
2393
2394                 } else if (show_properties) {
2395
2396                         /* Interpret as job id */
2397
2398                         if (!(m = dbus_message_new_method_call(
2399                                               "org.freedesktop.systemd1",
2400                                               "/org/freedesktop/systemd1",
2401                                               "org.freedesktop.systemd1.Manager",
2402                                               "GetJob"))) {
2403                                 log_error("Could not allocate message.");
2404                                 ret = -ENOMEM;
2405                                 goto finish;
2406                         }
2407
2408                         if (!dbus_message_append_args(m,
2409                                                       DBUS_TYPE_UINT32, &id,
2410                                                       DBUS_TYPE_INVALID)) {
2411                                 log_error("Could not append arguments to message.");
2412                                 ret = -ENOMEM;
2413                                 goto finish;
2414                         }
2415
2416                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2417                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2418                                 ret = -EIO;
2419                                 goto finish;
2420                         }
2421                 } else {
2422
2423                         /* Interpret as PID */
2424
2425                         if (!(m = dbus_message_new_method_call(
2426                                               "org.freedesktop.systemd1",
2427                                               "/org/freedesktop/systemd1",
2428                                               "org.freedesktop.systemd1.Manager",
2429                                               "GetUnitByPID"))) {
2430                                 log_error("Could not allocate message.");
2431                                 ret = -ENOMEM;
2432                                 goto finish;
2433                         }
2434
2435                         if (!dbus_message_append_args(m,
2436                                                       DBUS_TYPE_UINT32, &id,
2437                                                       DBUS_TYPE_INVALID)) {
2438                                 log_error("Could not append arguments to message.");
2439                                 ret = -ENOMEM;
2440                                 goto finish;
2441                         }
2442
2443                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2444                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2445                                 ret = -EIO;
2446                                 goto finish;
2447                         }
2448                 }
2449
2450                 if (!dbus_message_get_args(reply, &error,
2451                                            DBUS_TYPE_OBJECT_PATH, &path,
2452                                            DBUS_TYPE_INVALID)) {
2453                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2454                         ret = -EIO;
2455                         goto finish;
2456                 }
2457
2458                 if ((r = show_one(bus, path, show_properties, &new_line)) != 0)
2459                         ret = r;
2460
2461                 dbus_message_unref(m);
2462                 dbus_message_unref(reply);
2463                 m = reply = NULL;
2464         }
2465
2466 finish:
2467         if (m)
2468                 dbus_message_unref(m);
2469
2470         if (reply)
2471                 dbus_message_unref(reply);
2472
2473         dbus_error_free(&error);
2474
2475         return ret;
2476 }
2477
2478 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2479         DBusError error;
2480         DBusMessage *m = NULL, *reply = NULL;
2481
2482         assert(connection);
2483         assert(message);
2484
2485         dbus_error_init(&error);
2486
2487         log_debug("Got D-Bus request: %s.%s() on %s",
2488                   dbus_message_get_interface(message),
2489                   dbus_message_get_member(message),
2490                   dbus_message_get_path(message));
2491
2492         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2493                 log_error("Warning! D-Bus connection terminated.");
2494                 dbus_connection_close(connection);
2495
2496         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2497                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2498                 const char *id, *path;
2499
2500                 if (!dbus_message_get_args(message, &error,
2501                                            DBUS_TYPE_STRING, &id,
2502                                            DBUS_TYPE_OBJECT_PATH, &path,
2503                                            DBUS_TYPE_INVALID))
2504                         log_error("Failed to parse message: %s", bus_error_message(&error));
2505                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2506                         printf("Unit %s added.\n", id);
2507                 else
2508                         printf("Unit %s removed.\n", id);
2509
2510         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
2511                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2512                 uint32_t id;
2513                 const char *path;
2514
2515                 if (!dbus_message_get_args(message, &error,
2516                                            DBUS_TYPE_UINT32, &id,
2517                                            DBUS_TYPE_OBJECT_PATH, &path,
2518                                            DBUS_TYPE_INVALID))
2519                         log_error("Failed to parse message: %s", bus_error_message(&error));
2520                 else if (streq(dbus_message_get_member(message), "JobNew"))
2521                         printf("Job %u added.\n", id);
2522                 else
2523                         printf("Job %u removed.\n", id);
2524
2525
2526         } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) {
2527
2528                 const char *path, *interface, *property = "Id";
2529                 DBusMessageIter iter, sub;
2530
2531                 path = dbus_message_get_path(message);
2532
2533                 if (!dbus_message_get_args(message, &error,
2534                                           DBUS_TYPE_STRING, &interface,
2535                                           DBUS_TYPE_INVALID)) {
2536                         log_error("Failed to parse message: %s", bus_error_message(&error));
2537                         goto finish;
2538                 }
2539
2540                 if (!streq(interface, "org.freedesktop.systemd1.Job") &&
2541                     !streq(interface, "org.freedesktop.systemd1.Unit"))
2542                         goto finish;
2543
2544                 if (!(m = dbus_message_new_method_call(
2545                               "org.freedesktop.systemd1",
2546                               path,
2547                               "org.freedesktop.DBus.Properties",
2548                               "Get"))) {
2549                         log_error("Could not allocate message.");
2550                         goto oom;
2551                 }
2552
2553                 if (!dbus_message_append_args(m,
2554                                               DBUS_TYPE_STRING, &interface,
2555                                               DBUS_TYPE_STRING, &property,
2556                                               DBUS_TYPE_INVALID)) {
2557                         log_error("Could not append arguments to message.");
2558                         goto finish;
2559                 }
2560
2561                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2562                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2563                         goto finish;
2564                 }
2565
2566                 if (!dbus_message_iter_init(reply, &iter) ||
2567                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2568                         log_error("Failed to parse reply.");
2569                         goto finish;
2570                 }
2571
2572                 dbus_message_iter_recurse(&iter, &sub);
2573
2574                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2575                         const char *id;
2576
2577                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2578                                 log_error("Failed to parse reply.");
2579                                 goto finish;
2580                         }
2581
2582                         dbus_message_iter_get_basic(&sub, &id);
2583                         printf("Unit %s changed.\n", id);
2584                 } else {
2585                         uint32_t id;
2586
2587                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2588                                 log_error("Failed to parse reply.");
2589                                 goto finish;
2590                         }
2591
2592                         dbus_message_iter_get_basic(&sub, &id);
2593                         printf("Job %u changed.\n", id);
2594                 }
2595         }
2596
2597 finish:
2598         if (m)
2599                 dbus_message_unref(m);
2600
2601         if (reply)
2602                 dbus_message_unref(reply);
2603
2604         dbus_error_free(&error);
2605         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2606
2607 oom:
2608         if (m)
2609                 dbus_message_unref(m);
2610
2611         if (reply)
2612                 dbus_message_unref(reply);
2613
2614         dbus_error_free(&error);
2615         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2616 }
2617
2618 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2619         DBusMessage *m = NULL, *reply = NULL;
2620         DBusError error;
2621         int r;
2622
2623         dbus_error_init(&error);
2624
2625         if (!private_bus) {
2626                 dbus_bus_add_match(bus,
2627                                    "type='signal',"
2628                                    "sender='org.freedesktop.systemd1',"
2629                                    "interface='org.freedesktop.systemd1.Manager',"
2630                                    "path='/org/freedesktop/systemd1'",
2631                                    &error);
2632
2633                 if (dbus_error_is_set(&error)) {
2634                         log_error("Failed to add match: %s", bus_error_message(&error));
2635                         r = -EIO;
2636                         goto finish;
2637                 }
2638
2639                 dbus_bus_add_match(bus,
2640                                    "type='signal',"
2641                                    "sender='org.freedesktop.systemd1',"
2642                                    "interface='org.freedesktop.DBus.Properties',"
2643                                    "member='PropertiesChanged'",
2644                                    &error);
2645
2646                 if (dbus_error_is_set(&error)) {
2647                         log_error("Failed to add match: %s", bus_error_message(&error));
2648                         r = -EIO;
2649                         goto finish;
2650                 }
2651         }
2652
2653         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
2654                 log_error("Failed to add filter.");
2655                 r = -ENOMEM;
2656                 goto finish;
2657         }
2658
2659         if (!(m = dbus_message_new_method_call(
2660                               "org.freedesktop.systemd1",
2661                               "/org/freedesktop/systemd1",
2662                               "org.freedesktop.systemd1.Manager",
2663                               "Subscribe"))) {
2664                 log_error("Could not allocate message.");
2665                 r = -ENOMEM;
2666                 goto finish;
2667         }
2668
2669         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2670                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2671                 r = -EIO;
2672                 goto finish;
2673         }
2674
2675         while (dbus_connection_read_write_dispatch(bus, -1))
2676                 ;
2677
2678         r = 0;
2679
2680 finish:
2681
2682         /* This is slightly dirty, since we don't undo the filter or the matches. */
2683
2684         if (m)
2685                 dbus_message_unref(m);
2686
2687         if (reply)
2688                 dbus_message_unref(reply);
2689
2690         dbus_error_free(&error);
2691
2692         return r;
2693 }
2694
2695 static int dump(DBusConnection *bus, char **args, unsigned n) {
2696         DBusMessage *m = NULL, *reply = NULL;
2697         DBusError error;
2698         int r;
2699         const char *text;
2700
2701         dbus_error_init(&error);
2702
2703         if (!(m = dbus_message_new_method_call(
2704                               "org.freedesktop.systemd1",
2705                               "/org/freedesktop/systemd1",
2706                               "org.freedesktop.systemd1.Manager",
2707                               "Dump"))) {
2708                 log_error("Could not allocate message.");
2709                 return -ENOMEM;
2710         }
2711
2712         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2713                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2714                 r = -EIO;
2715                 goto finish;
2716         }
2717
2718         if (!dbus_message_get_args(reply, &error,
2719                                    DBUS_TYPE_STRING, &text,
2720                                    DBUS_TYPE_INVALID)) {
2721                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2722                 r = -EIO;
2723                 goto finish;
2724         }
2725
2726         fputs(text, stdout);
2727
2728         r = 0;
2729
2730 finish:
2731         if (m)
2732                 dbus_message_unref(m);
2733
2734         if (reply)
2735                 dbus_message_unref(reply);
2736
2737         dbus_error_free(&error);
2738
2739         return r;
2740 }
2741
2742 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
2743         DBusMessage *m = NULL, *reply = NULL;
2744         DBusError error;
2745         int r;
2746         const char *name = "", *path, *id;
2747         dbus_bool_t cleanup = FALSE;
2748         DBusMessageIter iter, sub;
2749         const char
2750                 *interface = "org.freedesktop.systemd1.Unit",
2751                 *property = "Id";
2752
2753         dbus_error_init(&error);
2754
2755         if (!(m = dbus_message_new_method_call(
2756                               "org.freedesktop.systemd1",
2757                               "/org/freedesktop/systemd1",
2758                               "org.freedesktop.systemd1.Manager",
2759                               "CreateSnapshot"))) {
2760                 log_error("Could not allocate message.");
2761                 return -ENOMEM;
2762         }
2763
2764         if (n > 1)
2765                 name = args[1];
2766
2767         if (!dbus_message_append_args(m,
2768                                       DBUS_TYPE_STRING, &name,
2769                                       DBUS_TYPE_BOOLEAN, &cleanup,
2770                                       DBUS_TYPE_INVALID)) {
2771                 log_error("Could not append arguments to message.");
2772                 r = -ENOMEM;
2773                 goto finish;
2774         }
2775
2776         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2777                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2778                 r = -EIO;
2779                 goto finish;
2780         }
2781
2782         if (!dbus_message_get_args(reply, &error,
2783                                    DBUS_TYPE_OBJECT_PATH, &path,
2784                                    DBUS_TYPE_INVALID)) {
2785                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2786                 r = -EIO;
2787                 goto finish;
2788         }
2789
2790         dbus_message_unref(m);
2791         if (!(m = dbus_message_new_method_call(
2792                               "org.freedesktop.systemd1",
2793                               path,
2794                               "org.freedesktop.DBus.Properties",
2795                               "Get"))) {
2796                 log_error("Could not allocate message.");
2797                 return -ENOMEM;
2798         }
2799
2800         if (!dbus_message_append_args(m,
2801                                       DBUS_TYPE_STRING, &interface,
2802                                       DBUS_TYPE_STRING, &property,
2803                                       DBUS_TYPE_INVALID)) {
2804                 log_error("Could not append arguments to message.");
2805                 r = -ENOMEM;
2806                 goto finish;
2807         }
2808
2809         dbus_message_unref(reply);
2810         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2811                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2812                 r = -EIO;
2813                 goto finish;
2814         }
2815
2816         if (!dbus_message_iter_init(reply, &iter) ||
2817             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2818                 log_error("Failed to parse reply.");
2819                 r = -EIO;
2820                 goto finish;
2821         }
2822
2823         dbus_message_iter_recurse(&iter, &sub);
2824
2825         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2826                 log_error("Failed to parse reply.");
2827                 r = -EIO;
2828                 goto finish;
2829         }
2830
2831         dbus_message_iter_get_basic(&sub, &id);
2832
2833         if (!arg_quiet)
2834                 puts(id);
2835         r = 0;
2836
2837 finish:
2838         if (m)
2839                 dbus_message_unref(m);
2840
2841         if (reply)
2842                 dbus_message_unref(reply);
2843
2844         dbus_error_free(&error);
2845
2846         return r;
2847 }
2848
2849 static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) {
2850         DBusMessage *m = NULL, *reply = NULL;
2851         int r;
2852         DBusError error;
2853         unsigned i;
2854
2855         assert(bus);
2856         assert(args);
2857
2858         dbus_error_init(&error);
2859
2860         for (i = 1; i < n; i++) {
2861                 const char *path = NULL;
2862
2863                 if (!(m = dbus_message_new_method_call(
2864                                       "org.freedesktop.systemd1",
2865                                       "/org/freedesktop/systemd1",
2866                                       "org.freedesktop.systemd1.Manager",
2867                                       "GetUnit"))) {
2868                         log_error("Could not allocate message.");
2869                         r = -ENOMEM;
2870                         goto finish;
2871                 }
2872
2873                 if (!dbus_message_append_args(m,
2874                                               DBUS_TYPE_STRING, &args[i],
2875                                               DBUS_TYPE_INVALID)) {
2876                         log_error("Could not append arguments to message.");
2877                         r = -ENOMEM;
2878                         goto finish;
2879                 }
2880
2881                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2882                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2883                         r = -EIO;
2884                         goto finish;
2885                 }
2886
2887                 if (!dbus_message_get_args(reply, &error,
2888                                            DBUS_TYPE_OBJECT_PATH, &path,
2889                                            DBUS_TYPE_INVALID)) {
2890                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2891                         r = -EIO;
2892                         goto finish;
2893                 }
2894
2895                 dbus_message_unref(m);
2896                 if (!(m = dbus_message_new_method_call(
2897                                       "org.freedesktop.systemd1",
2898                                       path,
2899                                       "org.freedesktop.systemd1.Snapshot",
2900                                       "Remove"))) {
2901                         log_error("Could not allocate message.");
2902                         r = -ENOMEM;
2903                         goto finish;
2904                 }
2905
2906                 dbus_message_unref(reply);
2907                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2908                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2909                         r = -EIO;
2910                         goto finish;
2911                 }
2912
2913                 dbus_message_unref(m);
2914                 dbus_message_unref(reply);
2915                 m = reply = NULL;
2916         }
2917
2918         r = 0;
2919
2920 finish:
2921         if (m)
2922                 dbus_message_unref(m);
2923
2924         if (reply)
2925                 dbus_message_unref(reply);
2926
2927         dbus_error_free(&error);
2928
2929         return r;
2930 }
2931
2932 static int daemon_reload(DBusConnection *bus, char **args, unsigned n) {
2933         DBusMessage *m = NULL, *reply = NULL;
2934         DBusError error;
2935         int r;
2936         const char *method;
2937
2938         dbus_error_init(&error);
2939
2940         if (arg_action == ACTION_RELOAD)
2941                 method = "Reload";
2942         else if (arg_action == ACTION_REEXEC)
2943                 method = "Reexecute";
2944         else {
2945                 assert(arg_action == ACTION_SYSTEMCTL);
2946
2947                 method =
2948                         streq(args[0], "clear-jobs")        ||
2949                         streq(args[0], "cancel")            ? "ClearJobs" :
2950                         streq(args[0], "daemon-reexec")     ? "Reexecute" :
2951                         streq(args[0], "reset-failed")      ? "ResetFailed" :
2952                         streq(args[0], "daemon-exit")       ? "Exit" :
2953                                                               "Reload";
2954         }
2955
2956         if (!(m = dbus_message_new_method_call(
2957                               "org.freedesktop.systemd1",
2958                               "/org/freedesktop/systemd1",
2959                               "org.freedesktop.systemd1.Manager",
2960                               method))) {
2961                 log_error("Could not allocate message.");
2962                 return -ENOMEM;
2963         }
2964
2965         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2966
2967                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
2968                         /* There's always a fallback possible for
2969                          * legacy actions. */
2970                         r = -EADDRNOTAVAIL;
2971                         goto finish;
2972                 }
2973
2974                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2975                 r = -EIO;
2976                 goto finish;
2977         }
2978
2979         r = 0;
2980
2981 finish:
2982         if (m)
2983                 dbus_message_unref(m);
2984
2985         if (reply)
2986                 dbus_message_unref(reply);
2987
2988         dbus_error_free(&error);
2989
2990         return r;
2991 }
2992
2993 static int reset_failed(DBusConnection *bus, char **args, unsigned n) {
2994         DBusMessage *m = NULL, *reply = NULL;
2995         unsigned i;
2996         int r;
2997         DBusError error;
2998
2999         assert(bus);
3000         dbus_error_init(&error);
3001
3002         if (n <= 1)
3003                 return daemon_reload(bus, args, n);
3004
3005         for (i = 1; i < n; i++) {
3006
3007                 if (!(m = dbus_message_new_method_call(
3008                                       "org.freedesktop.systemd1",
3009                                       "/org/freedesktop/systemd1",
3010                                       "org.freedesktop.systemd1.Manager",
3011                                       "ResetFailedUnit"))) {
3012                         log_error("Could not allocate message.");
3013                         r = -ENOMEM;
3014                         goto finish;
3015                 }
3016
3017                 if (!dbus_message_append_args(m,
3018                                               DBUS_TYPE_STRING, args + i,
3019                                               DBUS_TYPE_INVALID)) {
3020                         log_error("Could not append arguments to message.");
3021                         r = -ENOMEM;
3022                         goto finish;
3023                 }
3024
3025                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3026                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3027                         r = -EIO;
3028                         goto finish;
3029                 }
3030
3031                 dbus_message_unref(m);
3032                 dbus_message_unref(reply);
3033                 m = reply = NULL;
3034         }
3035
3036         r = 0;
3037
3038 finish:
3039         if (m)
3040                 dbus_message_unref(m);
3041
3042         if (reply)
3043                 dbus_message_unref(reply);
3044
3045         dbus_error_free(&error);
3046
3047         return r;
3048 }
3049
3050 static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
3051         DBusMessage *m = NULL, *reply = NULL;
3052         DBusError error;
3053         DBusMessageIter iter, sub, sub2;
3054         int r;
3055         const char
3056                 *interface = "org.freedesktop.systemd1.Manager",
3057                 *property = "Environment";
3058
3059         dbus_error_init(&error);
3060
3061         if (!(m = dbus_message_new_method_call(
3062                               "org.freedesktop.systemd1",
3063                               "/org/freedesktop/systemd1",
3064                               "org.freedesktop.DBus.Properties",
3065                               "Get"))) {
3066                 log_error("Could not allocate message.");
3067                 return -ENOMEM;
3068         }
3069
3070         if (!dbus_message_append_args(m,
3071                                       DBUS_TYPE_STRING, &interface,
3072                                       DBUS_TYPE_STRING, &property,
3073                                       DBUS_TYPE_INVALID)) {
3074                 log_error("Could not append arguments to message.");
3075                 r = -ENOMEM;
3076                 goto finish;
3077         }
3078
3079         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3080                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3081                 r = -EIO;
3082                 goto finish;
3083         }
3084
3085         if (!dbus_message_iter_init(reply, &iter) ||
3086             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3087                 log_error("Failed to parse reply.");
3088                 r = -EIO;
3089                 goto finish;
3090         }
3091
3092         dbus_message_iter_recurse(&iter, &sub);
3093
3094         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3095             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3096                 log_error("Failed to parse reply.");
3097                 r = -EIO;
3098                 goto finish;
3099         }
3100
3101         dbus_message_iter_recurse(&sub, &sub2);
3102
3103         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3104                 const char *text;
3105
3106                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3107                         log_error("Failed to parse reply.");
3108                         r = -EIO;
3109                         goto finish;
3110                 }
3111
3112                 dbus_message_iter_get_basic(&sub2, &text);
3113                 printf("%s\n", text);
3114
3115                 dbus_message_iter_next(&sub2);
3116         }
3117
3118         r = 0;
3119
3120 finish:
3121         if (m)
3122                 dbus_message_unref(m);
3123
3124         if (reply)
3125                 dbus_message_unref(reply);
3126
3127         dbus_error_free(&error);
3128
3129         return r;
3130 }
3131
3132 static int set_environment(DBusConnection *bus, char **args, unsigned n) {
3133         DBusMessage *m = NULL, *reply = NULL;
3134         DBusError error;
3135         int r;
3136         const char *method;
3137         DBusMessageIter iter, sub;
3138         unsigned i;
3139
3140         dbus_error_init(&error);
3141
3142         method = streq(args[0], "set-environment")
3143                 ? "SetEnvironment"
3144                 : "UnsetEnvironment";
3145
3146         if (!(m = dbus_message_new_method_call(
3147                               "org.freedesktop.systemd1",
3148                               "/org/freedesktop/systemd1",
3149                               "org.freedesktop.systemd1.Manager",