chiark / gitweb /
systemctl: hook up new install logic
[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 #include <stddef.h>
35 #include <sys/prctl.h>
36 #include <dbus/dbus.h>
37
38 #include "log.h"
39 #include "util.h"
40 #include "macro.h"
41 #include "set.h"
42 #include "utmp-wtmp.h"
43 #include "special.h"
44 #include "initreq.h"
45 #include "strv.h"
46 #include "dbus-common.h"
47 #include "cgroup-show.h"
48 #include "cgroup-util.h"
49 #include "list.h"
50 #include "path-lookup.h"
51 #include "conf-parser.h"
52 #include "sd-daemon.h"
53 #include "shutdownd.h"
54 #include "exit-status.h"
55 #include "bus-errors.h"
56 #include "build.h"
57 #include "unit-name.h"
58 #include "pager.h"
59 #include "spawn-agent.h"
60 #include "install.h"
61
62 static const char *arg_type = NULL;
63 static char **arg_property = NULL;
64 static bool arg_all = false;
65 static const char *arg_job_mode = "replace";
66 static UnitFileScope arg_scope = UNIT_FILE_SYSTEM;
67 static bool arg_immediate = false;
68 static bool arg_no_block = false;
69 static bool arg_no_pager = false;
70 static bool arg_no_wtmp = false;
71 static bool arg_no_sync = false;
72 static bool arg_no_wall = false;
73 static bool arg_no_reload = false;
74 static bool arg_dry = false;
75 static bool arg_quiet = false;
76 static bool arg_full = false;
77 static bool arg_force = false;
78 static bool arg_ask_password = false;
79 static bool arg_failed = false;
80 static bool arg_runtime = false;
81 static char **arg_wall = NULL;
82 static const char *arg_kill_who = NULL;
83 static const char *arg_kill_mode = NULL;
84 static int arg_signal = SIGTERM;
85 static const char *arg_root = NULL;
86 static usec_t arg_when = 0;
87 static enum action {
88         ACTION_INVALID,
89         ACTION_SYSTEMCTL,
90         ACTION_HALT,
91         ACTION_POWEROFF,
92         ACTION_REBOOT,
93         ACTION_KEXEC,
94         ACTION_EXIT,
95         ACTION_RUNLEVEL2,
96         ACTION_RUNLEVEL3,
97         ACTION_RUNLEVEL4,
98         ACTION_RUNLEVEL5,
99         ACTION_RESCUE,
100         ACTION_EMERGENCY,
101         ACTION_DEFAULT,
102         ACTION_RELOAD,
103         ACTION_REEXEC,
104         ACTION_RUNLEVEL,
105         ACTION_CANCEL_SHUTDOWN,
106         _ACTION_MAX
107 } arg_action = ACTION_SYSTEMCTL;
108 static enum dot {
109         DOT_ALL,
110         DOT_ORDER,
111         DOT_REQUIRE
112 } arg_dot = DOT_ALL;
113 static enum transport {
114         TRANSPORT_NORMAL,
115         TRANSPORT_SSH,
116         TRANSPORT_POLKIT
117 } arg_transport = TRANSPORT_NORMAL;
118 static const char *arg_host = NULL;
119
120 static bool private_bus = false;
121
122 static int daemon_reload(DBusConnection *bus, char **args);
123
124 static bool on_tty(void) {
125         static int t = -1;
126
127         /* Note that this is invoked relatively early, before we start
128          * the pager. That means the value we return reflects whether
129          * we originally were started on a tty, not if we currently
130          * are. But this is intended, since we want colour and so on
131          * when run in our own pager. */
132
133         if (_unlikely_(t < 0))
134                 t = isatty(STDOUT_FILENO) > 0;
135
136         return t;
137 }
138
139 static void pager_open_if_enabled(void) {
140         on_tty();
141
142         if (arg_no_pager)
143                 return;
144
145         pager_open();
146 }
147
148 static void agent_open_if_enabled(void) {
149
150         /* Open the password agent as a child process if necessary */
151
152         if (!arg_ask_password)
153                 return;
154
155         if (arg_scope != UNIT_FILE_SYSTEM)
156                 return;
157
158         agent_open();
159 }
160
161 static const char *ansi_highlight(bool b) {
162
163         if (!on_tty())
164                 return "";
165
166         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
167 }
168
169 static const char *ansi_highlight_green(bool b) {
170
171         if (!on_tty())
172                 return "";
173
174         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
175 }
176
177 static bool error_is_no_service(const DBusError *error) {
178         assert(error);
179
180         if (!dbus_error_is_set(error))
181                 return false;
182
183         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
184                 return true;
185
186         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
187                 return true;
188
189         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
190 }
191
192 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
193         assert(error);
194
195         if (!dbus_error_is_set(error))
196                 return r;
197
198         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
199             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
200             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
201             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
202                 return EXIT_NOPERMISSION;
203
204         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
205                 return EXIT_NOTINSTALLED;
206
207         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
208             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
209                 return EXIT_NOTIMPLEMENTED;
210
211         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
212                 return EXIT_NOTCONFIGURED;
213
214         if (r != 0)
215                 return r;
216
217         return EXIT_FAILURE;
218 }
219
220 static void warn_wall(enum action action) {
221         static const char *table[_ACTION_MAX] = {
222                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
223                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
224                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
225                 [ACTION_KEXEC]     = "The system is going down for kexec reboot NOW!",
226                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
227                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
228         };
229
230         if (arg_no_wall)
231                 return;
232
233         if (arg_wall) {
234                 char *p;
235
236                 if (!(p = strv_join(arg_wall, " "))) {
237                         log_error("Failed to join strings.");
238                         return;
239                 }
240
241                 if (*p) {
242                         utmp_wall(p, NULL);
243                         free(p);
244                         return;
245                 }
246
247                 free(p);
248         }
249
250         if (!table[action])
251                 return;
252
253         utmp_wall(table[action], NULL);
254 }
255
256 static bool avoid_bus(void) {
257
258         if (running_in_chroot() > 0)
259                 return true;
260
261         if (sd_booted() <= 0)
262                 return true;
263
264         if (!isempty(arg_root))
265                 return true;
266
267         if (arg_scope == UNIT_FILE_GLOBAL)
268                 return true;
269
270         return false;
271 }
272
273 struct unit_info {
274         const char *id;
275         const char *description;
276         const char *load_state;
277         const char *active_state;
278         const char *sub_state;
279         const char *following;
280         const char *unit_path;
281         uint32_t job_id;
282         const char *job_type;
283         const char *job_path;
284 };
285
286 static int compare_unit_info(const void *a, const void *b) {
287         const char *d1, *d2;
288         const struct unit_info *u = a, *v = b;
289
290         d1 = strrchr(u->id, '.');
291         d2 = strrchr(v->id, '.');
292
293         if (d1 && d2) {
294                 int r;
295
296                 if ((r = strcasecmp(d1, d2)) != 0)
297                         return r;
298         }
299
300         return strcasecmp(u->id, v->id);
301 }
302
303 static bool output_show_unit(const struct unit_info *u) {
304         const char *dot;
305
306         if (arg_failed)
307                 return streq(u->active_state, "failed");
308
309         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
310                               streq(dot+1, arg_type))) &&
311                 (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0);
312 }
313
314 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
315         unsigned active_len, sub_len, job_len, n_shown = 0;
316         const struct unit_info *u;
317
318         active_len = sizeof("ACTIVE")-1;
319         sub_len = sizeof("SUB")-1;
320         job_len = sizeof("JOB")-1;
321
322         for (u = unit_infos; u < unit_infos + c; u++) {
323                 if (!output_show_unit(u))
324                         continue;
325
326                 active_len = MAX(active_len, strlen(u->active_state));
327                 sub_len = MAX(sub_len, strlen(u->sub_state));
328                 if (u->job_id != 0)
329                         job_len = MAX(job_len, strlen(u->job_type));
330         }
331
332         if (on_tty()) {
333                 printf("%-25s %-6s %-*s %-*s %-*s", "UNIT", "LOAD",
334                        active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB");
335                 if (columns() >= 80+12 || arg_full || !arg_no_pager)
336                         printf(" %s\n", "DESCRIPTION");
337                 else
338                         printf("\n");
339         }
340
341         for (u = unit_infos; u < unit_infos + c; u++) {
342                 char *e;
343                 int a = 0, b = 0;
344                 const char *on_loaded, *off_loaded;
345                 const char *on_active, *off_active;
346
347                 if (!output_show_unit(u))
348                         continue;
349
350                 n_shown++;
351
352                 if (!streq(u->load_state, "loaded") &&
353                     !streq(u->load_state, "banned")) {
354                         on_loaded = ansi_highlight(true);
355                         off_loaded = ansi_highlight(false);
356                 } else
357                         on_loaded = off_loaded = "";
358
359                 if (streq(u->active_state, "failed")) {
360                         on_active = ansi_highlight(true);
361                         off_active = ansi_highlight(false);
362                 } else
363                         on_active = off_active = "";
364
365                 e = arg_full ? NULL : ellipsize(u->id, 25, 33);
366
367                 printf("%-25s %s%-6s%s %s%-*s %-*s%s%n",
368                        e ? e : u->id,
369                        on_loaded, u->load_state, off_loaded,
370                        on_active, active_len, u->active_state,
371                        sub_len, u->sub_state, off_active,
372                        &a);
373
374                 free(e);
375
376                 a -= strlen(on_loaded) + strlen(off_loaded);
377                 a -= strlen(on_active) + strlen(off_active);
378
379                 if (u->job_id != 0)
380                         printf(" %-*s", job_len, u->job_type);
381                 else
382                         b = 1 + job_len;
383
384                 if (a + b + 1 < columns()) {
385                         if (u->job_id == 0)
386                                 printf(" %-*s", job_len, "");
387
388                         if (arg_full || !arg_no_pager)
389                                 printf(" %s", u->description);
390                         else
391                                 printf(" %.*s", columns() - a - b - 1, u->description);
392                 }
393
394                 fputs("\n", stdout);
395         }
396
397         if (on_tty()) {
398                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
399                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
400                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
401                        "JOB    = Pending job for the unit.\n");
402
403                 if (arg_all)
404                         printf("\n%u units listed.\n", n_shown);
405                 else
406                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", n_shown);
407         }
408 }
409
410 static int list_units(DBusConnection *bus, char **args) {
411         DBusMessage *m = NULL, *reply = NULL;
412         DBusError error;
413         int r;
414         DBusMessageIter iter, sub, sub2;
415         unsigned c = 0, n_units = 0;
416         struct unit_info *unit_infos = NULL;
417
418         dbus_error_init(&error);
419
420         assert(bus);
421
422         pager_open_if_enabled();
423
424         if (!(m = dbus_message_new_method_call(
425                               "org.freedesktop.systemd1",
426                               "/org/freedesktop/systemd1",
427                               "org.freedesktop.systemd1.Manager",
428                               "ListUnits"))) {
429                 log_error("Could not allocate message.");
430                 return -ENOMEM;
431         }
432
433         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
434                 log_error("Failed to issue method call: %s", bus_error_message(&error));
435                 r = -EIO;
436                 goto finish;
437         }
438
439         if (!dbus_message_iter_init(reply, &iter) ||
440             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
441             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
442                 log_error("Failed to parse reply.");
443                 r = -EIO;
444                 goto finish;
445         }
446
447         dbus_message_iter_recurse(&iter, &sub);
448
449         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
450                 struct unit_info *u;
451
452                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
453                         log_error("Failed to parse reply.");
454                         r = -EIO;
455                         goto finish;
456                 }
457
458                 if (c >= n_units) {
459                         struct unit_info *w;
460
461                         n_units = MAX(2*c, 16);
462                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
463
464                         if (!w) {
465                                 log_error("Failed to allocate unit array.");
466                                 r = -ENOMEM;
467                                 goto finish;
468                         }
469
470                         unit_infos = w;
471                 }
472
473                 u = unit_infos+c;
474
475                 dbus_message_iter_recurse(&sub, &sub2);
476
477                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
478                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
479                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
480                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
481                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
482                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
483                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
484                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
485                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
486                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
487                         log_error("Failed to parse reply.");
488                         r = -EIO;
489                         goto finish;
490                 }
491
492                 dbus_message_iter_next(&sub);
493                 c++;
494         }
495
496         if (c > 0) {
497                 qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
498                 output_units_list(unit_infos, c);
499         }
500
501         r = 0;
502
503 finish:
504         if (m)
505                 dbus_message_unref(m);
506
507         if (reply)
508                 dbus_message_unref(reply);
509
510         free(unit_infos);
511
512         dbus_error_free(&error);
513
514         return r;
515 }
516
517 static int compare_unit_file_list(const void *a, const void *b) {
518         const char *d1, *d2;
519         const UnitFileList *u = a, *v = b;
520
521         d1 = strrchr(u->path, '.');
522         d2 = strrchr(v->path, '.');
523
524         if (d1 && d2) {
525                 int r;
526
527                 r = strcasecmp(d1, d2);
528                 if (r != 0)
529                         return r;
530         }
531
532         return strcasecmp(file_name_from_path(u->path), file_name_from_path(v->path));
533 }
534
535 static bool output_show_unit_file(const UnitFileList *u) {
536         const char *dot;
537
538         return !arg_type || ((dot = strrchr(u->path, '.')) && streq(dot+1, arg_type));
539 }
540
541 static void output_unit_file_list(const UnitFileList *units, unsigned c) {
542         unsigned n_shown = 0;
543         const UnitFileList *u;
544
545         if (on_tty())
546                 printf("%-25s %-6s\n", "UNIT FILE", "STATE");
547
548         for (u = units; u < units + c; u++) {
549                 char *e;
550                 const char *on, *off;
551                 const char *id;
552
553                 if (!output_show_unit_file(u))
554                         continue;
555
556                 n_shown++;
557
558                 if (u->state == UNIT_FILE_MASKED ||
559                     u->state == UNIT_FILE_MASKED_RUNTIME ||
560                     u->state == UNIT_FILE_DISABLED) {
561                         on  = ansi_highlight(true);
562                         off = ansi_highlight(false);
563                 } else if (u->state == UNIT_FILE_ENABLED) {
564                         on  = ansi_highlight_green(true);
565                         off = ansi_highlight_green(false);
566                 } else
567                         on = off = "";
568
569                 id = file_name_from_path(u->path);
570
571                 e = arg_full ? NULL : ellipsize(id, 25, 33);
572
573                 printf("%-25s %s%-6s%s\n",
574                        e ? e : id,
575                        on, unit_file_state_to_string(u->state), off);
576
577                 free(e);
578         }
579
580         if (on_tty())
581                 printf("\n%u unit files listed.\n", n_shown);
582 }
583
584 static int list_unit_files(DBusConnection *bus, char **args) {
585         DBusMessage *m = NULL, *reply = NULL;
586         DBusError error;
587         int r;
588         DBusMessageIter iter, sub, sub2;
589         unsigned c = 0, n_units = 0;
590         UnitFileList *units = NULL;
591
592         dbus_error_init(&error);
593
594         assert(bus);
595
596         pager_open_if_enabled();
597
598         if (avoid_bus()) {
599                 Hashmap *h;
600                 UnitFileList *u;
601                 Iterator i;
602
603                 h = hashmap_new(string_hash_func, string_compare_func);
604                 if (!h) {
605                         log_error("Out of memory");
606                         return -ENOMEM;
607                 }
608
609                 r = unit_file_get_list(arg_scope, arg_root, h);
610                 if (r < 0) {
611                         log_error("Failed to get unit file list: %s", strerror(-r));
612                         return r;
613                 }
614
615                 n_units = hashmap_size(h);
616                 units = new(UnitFileList, n_units);
617                 if (!units) {
618                         unit_file_list_free(h);
619                         log_error("Out of memory");
620                         return -ENOMEM;
621                 }
622
623                 HASHMAP_FOREACH(u, h, i) {
624                         memcpy(units + c++, u, sizeof(UnitFileList));
625                         free(u);
626                 }
627
628                 hashmap_free(h);
629         } else {
630                 m = dbus_message_new_method_call(
631                                 "org.freedesktop.systemd1",
632                                 "/org/freedesktop/systemd1",
633                                 "org.freedesktop.systemd1.Manager",
634                                 "ListUnitFiles");
635                 if (!m) {
636                         log_error("Could not allocate message.");
637                         return -ENOMEM;
638                 }
639
640                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
641                 if (!reply) {
642                         log_error("Failed to issue method call: %s", bus_error_message(&error));
643                         r = -EIO;
644                         goto finish;
645                 }
646
647                 if (!dbus_message_iter_init(reply, &iter) ||
648                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
649                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
650                         log_error("Failed to parse reply.");
651                         r = -EIO;
652                         goto finish;
653                 }
654
655                 dbus_message_iter_recurse(&iter, &sub);
656
657                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
658                         UnitFileList *u;
659                         const char *state;
660
661                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
662                                 log_error("Failed to parse reply.");
663                                 r = -EIO;
664                                 goto finish;
665                         }
666
667                         if (c >= n_units) {
668                                 UnitFileList *w;
669
670                                 n_units = MAX(2*c, 16);
671                                 w = realloc(units, sizeof(struct UnitFileList) * n_units);
672
673                                 if (!w) {
674                                         log_error("Failed to allocate unit array.");
675                                         r = -ENOMEM;
676                                         goto finish;
677                                 }
678
679                                 units = w;
680                         }
681
682                         u = units+c;
683
684                         dbus_message_iter_recurse(&sub, &sub2);
685
686                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->path, true) < 0 ||
687                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, false) < 0) {
688                                 log_error("Failed to parse reply.");
689                                 r = -EIO;
690                                 goto finish;
691                         }
692
693                         u->state = unit_file_state_from_string(state);
694
695                         dbus_message_iter_next(&sub);
696                         c++;
697                 }
698         }
699
700         if (c > 0) {
701                 qsort(units, c, sizeof(UnitFileList), compare_unit_file_list);
702                 output_unit_file_list(units, c);
703         }
704
705         r = 0;
706
707 finish:
708         if (m)
709                 dbus_message_unref(m);
710
711         if (reply)
712                 dbus_message_unref(reply);
713
714         free(units);
715
716         dbus_error_free(&error);
717
718         return r;
719 }
720
721 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
722         static const char * const colors[] = {
723                 "Requires",              "[color=\"black\"]",
724                 "RequiresOverridable",   "[color=\"black\"]",
725                 "Requisite",             "[color=\"darkblue\"]",
726                 "RequisiteOverridable",  "[color=\"darkblue\"]",
727                 "Wants",                 "[color=\"darkgrey\"]",
728                 "Conflicts",             "[color=\"red\"]",
729                 "ConflictedBy",          "[color=\"red\"]",
730                 "After",                 "[color=\"green\"]"
731         };
732
733         const char *c = NULL;
734         unsigned i;
735
736         assert(name);
737         assert(prop);
738         assert(iter);
739
740         for (i = 0; i < ELEMENTSOF(colors); i += 2)
741                 if (streq(colors[i], prop)) {
742                         c = colors[i+1];
743                         break;
744                 }
745
746         if (!c)
747                 return 0;
748
749         if (arg_dot != DOT_ALL)
750                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
751                         return 0;
752
753         switch (dbus_message_iter_get_arg_type(iter)) {
754
755         case DBUS_TYPE_ARRAY:
756
757                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
758                         DBusMessageIter sub;
759
760                         dbus_message_iter_recurse(iter, &sub);
761
762                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
763                                 const char *s;
764
765                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
766                                 dbus_message_iter_get_basic(&sub, &s);
767                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
768
769                                 dbus_message_iter_next(&sub);
770                         }
771
772                         return 0;
773                 }
774         }
775
776         return 0;
777 }
778
779 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
780         DBusMessage *m = NULL, *reply = NULL;
781         const char *interface = "org.freedesktop.systemd1.Unit";
782         int r;
783         DBusError error;
784         DBusMessageIter iter, sub, sub2, sub3;
785
786         assert(bus);
787         assert(path);
788
789         dbus_error_init(&error);
790
791         if (!(m = dbus_message_new_method_call(
792                               "org.freedesktop.systemd1",
793                               path,
794                               "org.freedesktop.DBus.Properties",
795                               "GetAll"))) {
796                 log_error("Could not allocate message.");
797                 r = -ENOMEM;
798                 goto finish;
799         }
800
801         if (!dbus_message_append_args(m,
802                                       DBUS_TYPE_STRING, &interface,
803                                       DBUS_TYPE_INVALID)) {
804                 log_error("Could not append arguments to message.");
805                 r = -ENOMEM;
806                 goto finish;
807         }
808
809         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
810                 log_error("Failed to issue method call: %s", bus_error_message(&error));
811                 r = -EIO;
812                 goto finish;
813         }
814
815         if (!dbus_message_iter_init(reply, &iter) ||
816             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
817             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
818                 log_error("Failed to parse reply.");
819                 r = -EIO;
820                 goto finish;
821         }
822
823         dbus_message_iter_recurse(&iter, &sub);
824
825         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
826                 const char *prop;
827
828                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
829                         log_error("Failed to parse reply.");
830                         r = -EIO;
831                         goto finish;
832                 }
833
834                 dbus_message_iter_recurse(&sub, &sub2);
835
836                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
837                         log_error("Failed to parse reply.");
838                         r = -EIO;
839                         goto finish;
840                 }
841
842                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
843                         log_error("Failed to parse reply.");
844                         r = -EIO;
845                         goto finish;
846                 }
847
848                 dbus_message_iter_recurse(&sub2, &sub3);
849
850                 if (dot_one_property(name, prop, &sub3)) {
851                         log_error("Failed to parse reply.");
852                         r = -EIO;
853                         goto finish;
854                 }
855
856                 dbus_message_iter_next(&sub);
857         }
858
859         r = 0;
860
861 finish:
862         if (m)
863                 dbus_message_unref(m);
864
865         if (reply)
866                 dbus_message_unref(reply);
867
868         dbus_error_free(&error);
869
870         return r;
871 }
872
873 static int dot(DBusConnection *bus, char **args) {
874         DBusMessage *m = NULL, *reply = NULL;
875         DBusError error;
876         int r;
877         DBusMessageIter iter, sub, sub2;
878
879         dbus_error_init(&error);
880
881         assert(bus);
882
883         if (!(m = dbus_message_new_method_call(
884                               "org.freedesktop.systemd1",
885                               "/org/freedesktop/systemd1",
886                               "org.freedesktop.systemd1.Manager",
887                               "ListUnits"))) {
888                 log_error("Could not allocate message.");
889                 return -ENOMEM;
890         }
891
892         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
893                 log_error("Failed to issue method call: %s", bus_error_message(&error));
894                 r = -EIO;
895                 goto finish;
896         }
897
898         if (!dbus_message_iter_init(reply, &iter) ||
899             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
900             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
901                 log_error("Failed to parse reply.");
902                 r = -EIO;
903                 goto finish;
904         }
905
906         printf("digraph systemd {\n");
907
908         dbus_message_iter_recurse(&iter, &sub);
909         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
910                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
911
912                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
913                         log_error("Failed to parse reply.");
914                         r = -EIO;
915                         goto finish;
916                 }
917
918                 dbus_message_iter_recurse(&sub, &sub2);
919
920                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
921                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
922                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
923                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
924                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
925                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
926                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
927                         log_error("Failed to parse reply.");
928                         r = -EIO;
929                         goto finish;
930                 }
931
932                 if ((r = dot_one(bus, id, unit_path)) < 0)
933                         goto finish;
934
935                 /* printf("\t\"%s\";\n", id); */
936                 dbus_message_iter_next(&sub);
937         }
938
939         printf("}\n");
940
941         log_info("   Color legend: black     = Requires\n"
942                  "                 dark blue = Requisite\n"
943                  "                 dark grey = Wants\n"
944                  "                 red       = Conflicts\n"
945                  "                 green     = After\n");
946
947         if (on_tty())
948                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
949                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
950
951         r = 0;
952
953 finish:
954         if (m)
955                 dbus_message_unref(m);
956
957         if (reply)
958                 dbus_message_unref(reply);
959
960         dbus_error_free(&error);
961
962         return r;
963 }
964
965 static int list_jobs(DBusConnection *bus, char **args) {
966         DBusMessage *m = NULL, *reply = NULL;
967         DBusError error;
968         int r;
969         DBusMessageIter iter, sub, sub2;
970         unsigned k = 0;
971
972         dbus_error_init(&error);
973
974         assert(bus);
975
976         pager_open_if_enabled();
977
978         if (!(m = dbus_message_new_method_call(
979                               "org.freedesktop.systemd1",
980                               "/org/freedesktop/systemd1",
981                               "org.freedesktop.systemd1.Manager",
982                               "ListJobs"))) {
983                 log_error("Could not allocate message.");
984                 return -ENOMEM;
985         }
986
987         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
988                 log_error("Failed to issue method call: %s", bus_error_message(&error));
989                 r = -EIO;
990                 goto finish;
991         }
992
993         if (!dbus_message_iter_init(reply, &iter) ||
994             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
995             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
996                 log_error("Failed to parse reply.");
997                 r = -EIO;
998                 goto finish;
999         }
1000
1001         dbus_message_iter_recurse(&iter, &sub);
1002
1003         if (on_tty())
1004                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
1005
1006         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1007                 const char *name, *type, *state, *job_path, *unit_path;
1008                 uint32_t id;
1009                 char *e;
1010
1011                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
1012                         log_error("Failed to parse reply.");
1013                         r = -EIO;
1014                         goto finish;
1015                 }
1016
1017                 dbus_message_iter_recurse(&sub, &sub2);
1018
1019                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
1020                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
1021                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
1022                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
1023                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
1024                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
1025                         log_error("Failed to parse reply.");
1026                         r = -EIO;
1027                         goto finish;
1028                 }
1029
1030                 e = arg_full ? NULL : ellipsize(name, 25, 33);
1031                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
1032                 free(e);
1033
1034                 k++;
1035
1036                 dbus_message_iter_next(&sub);
1037         }
1038
1039         if (on_tty())
1040                 printf("\n%u jobs listed.\n", k);
1041
1042         r = 0;
1043
1044 finish:
1045         if (m)
1046                 dbus_message_unref(m);
1047
1048         if (reply)
1049                 dbus_message_unref(reply);
1050
1051         dbus_error_free(&error);
1052
1053         return r;
1054 }
1055
1056 static int load_unit(DBusConnection *bus, char **args) {
1057         DBusMessage *m = NULL, *reply = NULL;
1058         DBusError error;
1059         int r;
1060         char **name;
1061
1062         dbus_error_init(&error);
1063
1064         assert(bus);
1065         assert(args);
1066
1067         STRV_FOREACH(name, args+1) {
1068
1069                 if (!(m = dbus_message_new_method_call(
1070                                       "org.freedesktop.systemd1",
1071                                       "/org/freedesktop/systemd1",
1072                                       "org.freedesktop.systemd1.Manager",
1073                                       "LoadUnit"))) {
1074                         log_error("Could not allocate message.");
1075                         r = -ENOMEM;
1076                         goto finish;
1077                 }
1078
1079                 if (!dbus_message_append_args(m,
1080                                               DBUS_TYPE_STRING, name,
1081                                               DBUS_TYPE_INVALID)) {
1082                         log_error("Could not append arguments to message.");
1083                         r = -ENOMEM;
1084                         goto finish;
1085                 }
1086
1087                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1088                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1089                         r = -EIO;
1090                         goto finish;
1091                 }
1092
1093                 dbus_message_unref(m);
1094                 dbus_message_unref(reply);
1095
1096                 m = reply = NULL;
1097         }
1098
1099         r = 0;
1100
1101 finish:
1102         if (m)
1103                 dbus_message_unref(m);
1104
1105         if (reply)
1106                 dbus_message_unref(reply);
1107
1108         dbus_error_free(&error);
1109
1110         return r;
1111 }
1112
1113 static int cancel_job(DBusConnection *bus, char **args) {
1114         DBusMessage *m = NULL, *reply = NULL;
1115         DBusError error;
1116         int r;
1117         char **name;
1118
1119         dbus_error_init(&error);
1120
1121         assert(bus);
1122         assert(args);
1123
1124         if (strv_length(args) <= 1)
1125                 return daemon_reload(bus, args);
1126
1127         STRV_FOREACH(name, args+1) {
1128                 unsigned id;
1129                 const char *path;
1130
1131                 if (!(m = dbus_message_new_method_call(
1132                                       "org.freedesktop.systemd1",
1133                                       "/org/freedesktop/systemd1",
1134                                       "org.freedesktop.systemd1.Manager",
1135                                       "GetJob"))) {
1136                         log_error("Could not allocate message.");
1137                         r = -ENOMEM;
1138                         goto finish;
1139                 }
1140
1141                 if ((r = safe_atou(*name, &id)) < 0) {
1142                         log_error("Failed to parse job id: %s", strerror(-r));
1143                         goto finish;
1144                 }
1145
1146                 assert_cc(sizeof(uint32_t) == sizeof(id));
1147                 if (!dbus_message_append_args(m,
1148                                               DBUS_TYPE_UINT32, &id,
1149                                               DBUS_TYPE_INVALID)) {
1150                         log_error("Could not append arguments to message.");
1151                         r = -ENOMEM;
1152                         goto finish;
1153                 }
1154
1155                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1156                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1157                         r = -EIO;
1158                         goto finish;
1159                 }
1160
1161                 if (!dbus_message_get_args(reply, &error,
1162                                            DBUS_TYPE_OBJECT_PATH, &path,
1163                                            DBUS_TYPE_INVALID)) {
1164                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1165                         r = -EIO;
1166                         goto finish;
1167                 }
1168
1169                 dbus_message_unref(m);
1170                 if (!(m = dbus_message_new_method_call(
1171                                       "org.freedesktop.systemd1",
1172                                       path,
1173                                       "org.freedesktop.systemd1.Job",
1174                                       "Cancel"))) {
1175                         log_error("Could not allocate message.");
1176                         r = -ENOMEM;
1177                         goto finish;
1178                 }
1179
1180                 dbus_message_unref(reply);
1181                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1182                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1183                         r = -EIO;
1184                         goto finish;
1185                 }
1186
1187                 dbus_message_unref(m);
1188                 dbus_message_unref(reply);
1189                 m = reply = NULL;
1190         }
1191
1192         r = 0;
1193
1194 finish:
1195         if (m)
1196                 dbus_message_unref(m);
1197
1198         if (reply)
1199                 dbus_message_unref(reply);
1200
1201         dbus_error_free(&error);
1202
1203         return r;
1204 }
1205
1206 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
1207         DBusMessage *m = NULL, *reply = NULL;
1208         dbus_bool_t b = FALSE;
1209         DBusMessageIter iter, sub;
1210         const char
1211                 *interface = "org.freedesktop.systemd1.Unit",
1212                 *property = "NeedDaemonReload",
1213                 *path;
1214
1215         /* We ignore all errors here, since this is used to show a warning only */
1216
1217         if (!(m = dbus_message_new_method_call(
1218                               "org.freedesktop.systemd1",
1219                               "/org/freedesktop/systemd1",
1220                               "org.freedesktop.systemd1.Manager",
1221                               "GetUnit")))
1222                 goto finish;
1223
1224         if (!dbus_message_append_args(m,
1225                                       DBUS_TYPE_STRING, &unit,
1226                                       DBUS_TYPE_INVALID))
1227                 goto finish;
1228
1229         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1230                 goto finish;
1231
1232         if (!dbus_message_get_args(reply, NULL,
1233                                    DBUS_TYPE_OBJECT_PATH, &path,
1234                                    DBUS_TYPE_INVALID))
1235                 goto finish;
1236
1237         dbus_message_unref(m);
1238         if (!(m = dbus_message_new_method_call(
1239                               "org.freedesktop.systemd1",
1240                               path,
1241                               "org.freedesktop.DBus.Properties",
1242                               "Get")))
1243                 goto finish;
1244
1245         if (!dbus_message_append_args(m,
1246                                       DBUS_TYPE_STRING, &interface,
1247                                       DBUS_TYPE_STRING, &property,
1248                                       DBUS_TYPE_INVALID)) {
1249                 goto finish;
1250         }
1251
1252         dbus_message_unref(reply);
1253         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1254                 goto finish;
1255
1256         if (!dbus_message_iter_init(reply, &iter) ||
1257             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1258                 goto finish;
1259
1260         dbus_message_iter_recurse(&iter, &sub);
1261
1262         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1263                 goto finish;
1264
1265         dbus_message_iter_get_basic(&sub, &b);
1266
1267 finish:
1268         if (m)
1269                 dbus_message_unref(m);
1270
1271         if (reply)
1272                 dbus_message_unref(reply);
1273
1274         return b;
1275 }
1276
1277 typedef struct WaitData {
1278         Set *set;
1279         char *result;
1280 } WaitData;
1281
1282 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1283         DBusError error;
1284         WaitData *d = data;
1285
1286         assert(connection);
1287         assert(message);
1288         assert(d);
1289
1290         dbus_error_init(&error);
1291
1292         log_debug("Got D-Bus request: %s.%s() on %s",
1293                   dbus_message_get_interface(message),
1294                   dbus_message_get_member(message),
1295                   dbus_message_get_path(message));
1296
1297         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1298                 log_error("Warning! D-Bus connection terminated.");
1299                 dbus_connection_close(connection);
1300
1301         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1302                 uint32_t id;
1303                 const char *path, *result;
1304                 dbus_bool_t success = true;
1305
1306                 if (dbus_message_get_args(message, &error,
1307                                           DBUS_TYPE_UINT32, &id,
1308                                           DBUS_TYPE_OBJECT_PATH, &path,
1309                                           DBUS_TYPE_STRING, &result,
1310                                           DBUS_TYPE_INVALID)) {
1311                         char *p;
1312
1313                         if ((p = set_remove(d->set, (char*) path)))
1314                                 free(p);
1315
1316                         if (*result)
1317                                 d->result = strdup(result);
1318
1319                         goto finish;
1320                 }
1321 #ifndef LEGACY
1322                 dbus_error_free(&error);
1323
1324                 if (dbus_message_get_args(message, &error,
1325                                           DBUS_TYPE_UINT32, &id,
1326                                           DBUS_TYPE_OBJECT_PATH, &path,
1327                                           DBUS_TYPE_BOOLEAN, &success,
1328                                           DBUS_TYPE_INVALID)) {
1329                         char *p;
1330
1331                         /* Compatibility with older systemd versions <
1332                          * 19 during upgrades. This should be dropped
1333                          * one day */
1334
1335                         if ((p = set_remove(d->set, (char*) path)))
1336                                 free(p);
1337
1338                         if (!success)
1339                                 d->result = strdup("failed");
1340
1341                         goto finish;
1342                 }
1343 #endif
1344
1345                 log_error("Failed to parse message: %s", bus_error_message(&error));
1346         }
1347
1348 finish:
1349         dbus_error_free(&error);
1350         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1351 }
1352
1353 static int enable_wait_for_jobs(DBusConnection *bus) {
1354         DBusError error;
1355
1356         assert(bus);
1357
1358         if (private_bus)
1359                 return 0;
1360
1361         dbus_error_init(&error);
1362         dbus_bus_add_match(bus,
1363                            "type='signal',"
1364                            "sender='org.freedesktop.systemd1',"
1365                            "interface='org.freedesktop.systemd1.Manager',"
1366                            "member='JobRemoved',"
1367                            "path='/org/freedesktop/systemd1'",
1368                            &error);
1369
1370         if (dbus_error_is_set(&error)) {
1371                 log_error("Failed to add match: %s", bus_error_message(&error));
1372                 dbus_error_free(&error);
1373                 return -EIO;
1374         }
1375
1376         /* This is slightly dirty, since we don't undo the match registrations. */
1377         return 0;
1378 }
1379
1380 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1381         int r;
1382         WaitData d;
1383
1384         assert(bus);
1385         assert(s);
1386
1387         zero(d);
1388         d.set = s;
1389
1390         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1391                 log_error("Failed to add filter.");
1392                 r = -ENOMEM;
1393                 goto finish;
1394         }
1395
1396         while (!set_isempty(s) &&
1397                dbus_connection_read_write_dispatch(bus, -1))
1398                 ;
1399
1400         if (!arg_quiet && d.result) {
1401                 if (streq(d.result, "timeout"))
1402                         log_error("Job timed out.");
1403                 else if (streq(d.result, "canceled"))
1404                         log_error("Job canceled.");
1405                 else if (streq(d.result, "dependency"))
1406                         log_error("A dependency job failed. See system logs for details.");
1407                 else if (!streq(d.result, "done") && !streq(d.result, "skipped"))
1408                         log_error("Job failed. See system logs and 'systemctl status' for details.");
1409         }
1410
1411         if (streq_ptr(d.result, "timeout"))
1412                 r = -ETIME;
1413         else if (streq_ptr(d.result, "canceled"))
1414                 r = -ECANCELED;
1415         else if (!streq_ptr(d.result, "done") && !streq_ptr(d.result, "skipped"))
1416                 r = -EIO;
1417         else
1418                 r = 0;
1419
1420         free(d.result);
1421
1422 finish:
1423         /* This is slightly dirty, since we don't undo the filter registration. */
1424
1425         return r;
1426 }
1427
1428 static int start_unit_one(
1429                 DBusConnection *bus,
1430                 const char *method,
1431                 const char *name,
1432                 const char *mode,
1433                 DBusError *error,
1434                 Set *s) {
1435
1436         DBusMessage *m = NULL, *reply = NULL;
1437         const char *path;
1438         int r;
1439
1440         assert(bus);
1441         assert(method);
1442         assert(name);
1443         assert(mode);
1444         assert(error);
1445         assert(arg_no_block || s);
1446
1447         if (!(m = dbus_message_new_method_call(
1448                               "org.freedesktop.systemd1",
1449                               "/org/freedesktop/systemd1",
1450                               "org.freedesktop.systemd1.Manager",
1451                               method))) {
1452                 log_error("Could not allocate message.");
1453                 r = -ENOMEM;
1454                 goto finish;
1455         }
1456
1457         if (!dbus_message_append_args(m,
1458                                       DBUS_TYPE_STRING, &name,
1459                                       DBUS_TYPE_STRING, &mode,
1460                                       DBUS_TYPE_INVALID)) {
1461                 log_error("Could not append arguments to message.");
1462                 r = -ENOMEM;
1463                 goto finish;
1464         }
1465
1466         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1467
1468                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1469                         /* There's always a fallback possible for
1470                          * legacy actions. */
1471                         r = -EADDRNOTAVAIL;
1472                         goto finish;
1473                 }
1474
1475                 log_error("Failed to issue method call: %s", bus_error_message(error));
1476                 r = -EIO;
1477                 goto finish;
1478         }
1479
1480         if (!dbus_message_get_args(reply, error,
1481                                    DBUS_TYPE_OBJECT_PATH, &path,
1482                                    DBUS_TYPE_INVALID)) {
1483                 log_error("Failed to parse reply: %s", bus_error_message(error));
1484                 r = -EIO;
1485                 goto finish;
1486         }
1487
1488         if (need_daemon_reload(bus, name))
1489                 log_warning("Warning: Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1490                             arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
1491
1492         if (!arg_no_block) {
1493                 char *p;
1494
1495                 if (!(p = strdup(path))) {
1496                         log_error("Failed to duplicate path.");
1497                         r = -ENOMEM;
1498                         goto finish;
1499                 }
1500
1501                 if ((r = set_put(s, p)) < 0) {
1502                         free(p);
1503                         log_error("Failed to add path to set.");
1504                         goto finish;
1505                 }
1506         }
1507
1508         r = 0;
1509
1510 finish:
1511         if (m)
1512                 dbus_message_unref(m);
1513
1514         if (reply)
1515                 dbus_message_unref(reply);
1516
1517         return r;
1518 }
1519
1520 static enum action verb_to_action(const char *verb) {
1521         if (streq(verb, "halt"))
1522                 return ACTION_HALT;
1523         else if (streq(verb, "poweroff"))
1524                 return ACTION_POWEROFF;
1525         else if (streq(verb, "reboot"))
1526                 return ACTION_REBOOT;
1527         else if (streq(verb, "kexec"))
1528                 return ACTION_KEXEC;
1529         else if (streq(verb, "rescue"))
1530                 return ACTION_RESCUE;
1531         else if (streq(verb, "emergency"))
1532                 return ACTION_EMERGENCY;
1533         else if (streq(verb, "default"))
1534                 return ACTION_DEFAULT;
1535         else if (streq(verb, "exit"))
1536                 return ACTION_EXIT;
1537         else
1538                 return ACTION_INVALID;
1539 }
1540
1541 static int start_unit(DBusConnection *bus, char **args) {
1542
1543         static const char * const table[_ACTION_MAX] = {
1544                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1545                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1546                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1547                 [ACTION_KEXEC] = SPECIAL_KEXEC_TARGET,
1548                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1549                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1550                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1551                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1552                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1553                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1554                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET,
1555                 [ACTION_EXIT] = SPECIAL_EXIT_TARGET
1556         };
1557
1558         int r, ret = 0;
1559         const char *method, *mode, *one_name;
1560         Set *s = NULL;
1561         DBusError error;
1562         char **name;
1563
1564         dbus_error_init(&error);
1565
1566         assert(bus);
1567
1568         agent_open_if_enabled();
1569
1570         if (arg_action == ACTION_SYSTEMCTL) {
1571                 method =
1572                         streq(args[0], "stop") ||
1573                         streq(args[0], "condstop")              ? "StopUnit" :
1574                         streq(args[0], "reload")                ? "ReloadUnit" :
1575                         streq(args[0], "restart")               ? "RestartUnit" :
1576
1577                         streq(args[0], "try-restart")           ||
1578                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1579
1580                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1581
1582                         streq(args[0], "reload-or-try-restart") ||
1583                         streq(args[0], "condreload") ||
1584
1585                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1586                                                                   "StartUnit";
1587
1588                 mode =
1589                         (streq(args[0], "isolate") ||
1590                          streq(args[0], "rescue")  ||
1591                          streq(args[0], "emergency")) ? "isolate" : arg_job_mode;
1592
1593                 one_name = table[verb_to_action(args[0])];
1594
1595         } else {
1596                 assert(arg_action < ELEMENTSOF(table));
1597                 assert(table[arg_action]);
1598
1599                 method = "StartUnit";
1600
1601                 mode = (arg_action == ACTION_EMERGENCY ||
1602                         arg_action == ACTION_RESCUE ||
1603                         arg_action == ACTION_RUNLEVEL2 ||
1604                         arg_action == ACTION_RUNLEVEL3 ||
1605                         arg_action == ACTION_RUNLEVEL4 ||
1606                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1607
1608                 one_name = table[arg_action];
1609         }
1610
1611         if (!arg_no_block) {
1612                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1613                         log_error("Could not watch jobs: %s", strerror(-ret));
1614                         goto finish;
1615                 }
1616
1617                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1618                         log_error("Failed to allocate set.");
1619                         ret = -ENOMEM;
1620                         goto finish;
1621                 }
1622         }
1623
1624         if (one_name) {
1625                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1626                         goto finish;
1627         } else {
1628                 STRV_FOREACH(name, args+1)
1629                         if ((r = start_unit_one(bus, method, *name, mode, &error, s)) != 0) {
1630                                 ret = translate_bus_error_to_exit_status(r, &error);
1631                                 dbus_error_free(&error);
1632                         }
1633         }
1634
1635         if (!arg_no_block)
1636                 if ((r = wait_for_jobs(bus, s)) < 0) {
1637                         ret = r;
1638                         goto finish;
1639                 }
1640
1641 finish:
1642         if (s)
1643                 set_free_free(s);
1644
1645         dbus_error_free(&error);
1646
1647         return ret;
1648 }
1649
1650 static int start_special(DBusConnection *bus, char **args) {
1651         int r;
1652
1653         assert(bus);
1654         assert(args);
1655
1656         if (arg_force &&
1657             (streq(args[0], "halt") ||
1658              streq(args[0], "poweroff") ||
1659              streq(args[0], "reboot") ||
1660              streq(args[0], "kexec") ||
1661              streq(args[0], "exit")))
1662                 return daemon_reload(bus, args);
1663
1664         r = start_unit(bus, args);
1665
1666         if (r >= 0)
1667                 warn_wall(verb_to_action(args[0]));
1668
1669         return r;
1670 }
1671
1672 static int check_unit(DBusConnection *bus, char **args) {
1673         DBusMessage *m = NULL, *reply = NULL;
1674         const char
1675                 *interface = "org.freedesktop.systemd1.Unit",
1676                 *property = "ActiveState";
1677         int r = 3; /* According to LSB: "program is not running" */
1678         DBusError error;
1679         char **name;
1680
1681         assert(bus);
1682         assert(args);
1683
1684         dbus_error_init(&error);
1685
1686         STRV_FOREACH(name, args+1) {
1687                 const char *path = NULL;
1688                 const char *state;
1689                 DBusMessageIter iter, sub;
1690
1691                 if (!(m = dbus_message_new_method_call(
1692                                       "org.freedesktop.systemd1",
1693                                       "/org/freedesktop/systemd1",
1694                                       "org.freedesktop.systemd1.Manager",
1695                                       "GetUnit"))) {
1696                         log_error("Could not allocate message.");
1697                         r = -ENOMEM;
1698                         goto finish;
1699                 }
1700
1701                 if (!dbus_message_append_args(m,
1702                                               DBUS_TYPE_STRING, name,
1703                                               DBUS_TYPE_INVALID)) {
1704                         log_error("Could not append arguments to message.");
1705                         r = -ENOMEM;
1706                         goto finish;
1707                 }
1708
1709                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1710
1711                         /* Hmm, cannot figure out anything about this unit... */
1712                         if (!arg_quiet)
1713                                 puts("unknown");
1714
1715                         dbus_error_free(&error);
1716                         dbus_message_unref(m);
1717                         m = NULL;
1718                         continue;
1719                 }
1720
1721                 if (!dbus_message_get_args(reply, &error,
1722                                            DBUS_TYPE_OBJECT_PATH, &path,
1723                                            DBUS_TYPE_INVALID)) {
1724                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1725                         r = -EIO;
1726                         goto finish;
1727                 }
1728
1729                 dbus_message_unref(m);
1730                 if (!(m = dbus_message_new_method_call(
1731                                       "org.freedesktop.systemd1",
1732                                       path,
1733                                       "org.freedesktop.DBus.Properties",
1734                                       "Get"))) {
1735                         log_error("Could not allocate message.");
1736                         r = -ENOMEM;
1737                         goto finish;
1738                 }
1739
1740                 if (!dbus_message_append_args(m,
1741                                               DBUS_TYPE_STRING, &interface,
1742                                               DBUS_TYPE_STRING, &property,
1743                                               DBUS_TYPE_INVALID)) {
1744                         log_error("Could not append arguments to message.");
1745                         r = -ENOMEM;
1746                         goto finish;
1747                 }
1748
1749                 dbus_message_unref(reply);
1750                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1751                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1752                         r = -EIO;
1753                         goto finish;
1754                 }
1755
1756                 if (!dbus_message_iter_init(reply, &iter) ||
1757                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1758                         log_error("Failed to parse reply.");
1759                         r = -EIO;
1760                         goto finish;
1761                 }
1762
1763                 dbus_message_iter_recurse(&iter, &sub);
1764
1765                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1766                         log_error("Failed to parse reply.");
1767                         r = -EIO;
1768                         goto finish;
1769                 }
1770
1771                 dbus_message_iter_get_basic(&sub, &state);
1772
1773                 if (!arg_quiet)
1774                         puts(state);
1775
1776                 if (streq(state, "active") || streq(state, "reloading"))
1777                         r = 0;
1778
1779                 dbus_message_unref(m);
1780                 dbus_message_unref(reply);
1781                 m = reply = NULL;
1782         }
1783
1784 finish:
1785         if (m)
1786                 dbus_message_unref(m);
1787
1788         if (reply)
1789                 dbus_message_unref(reply);
1790
1791         dbus_error_free(&error);
1792
1793         return r;
1794 }
1795
1796 static int kill_unit(DBusConnection *bus, char **args) {
1797         DBusMessage *m = NULL, *reply = NULL;
1798         int r = 0;
1799         DBusError error;
1800         char **name;
1801
1802         assert(bus);
1803         assert(args);
1804
1805         dbus_error_init(&error);
1806
1807         if (!arg_kill_who)
1808                 arg_kill_who = "all";
1809
1810         if (!arg_kill_mode)
1811                 arg_kill_mode = streq(arg_kill_who, "all") ? "control-group" : "process";
1812
1813         STRV_FOREACH(name, args+1) {
1814
1815                 if (!(m = dbus_message_new_method_call(
1816                                       "org.freedesktop.systemd1",
1817                                       "/org/freedesktop/systemd1",
1818                                       "org.freedesktop.systemd1.Manager",
1819                                       "KillUnit"))) {
1820                         log_error("Could not allocate message.");
1821                         r = -ENOMEM;
1822                         goto finish;
1823                 }
1824
1825                 if (!dbus_message_append_args(m,
1826                                               DBUS_TYPE_STRING, name,
1827                                               DBUS_TYPE_STRING, &arg_kill_who,
1828                                               DBUS_TYPE_STRING, &arg_kill_mode,
1829                                               DBUS_TYPE_INT32, &arg_signal,
1830                                               DBUS_TYPE_INVALID)) {
1831                         log_error("Could not append arguments to message.");
1832                         r = -ENOMEM;
1833                         goto finish;
1834                 }
1835
1836                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1837                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1838                         dbus_error_free(&error);
1839                         r = -EIO;
1840                 }
1841
1842                 dbus_message_unref(m);
1843
1844                 if (reply)
1845                         dbus_message_unref(reply);
1846                 m = reply = NULL;
1847         }
1848
1849 finish:
1850         if (m)
1851                 dbus_message_unref(m);
1852
1853         if (reply)
1854                 dbus_message_unref(reply);
1855
1856         dbus_error_free(&error);
1857
1858         return r;
1859 }
1860
1861 typedef struct ExecStatusInfo {
1862         char *name;
1863
1864         char *path;
1865         char **argv;
1866
1867         bool ignore;
1868
1869         usec_t start_timestamp;
1870         usec_t exit_timestamp;
1871         pid_t pid;
1872         int code;
1873         int status;
1874
1875         LIST_FIELDS(struct ExecStatusInfo, exec);
1876 } ExecStatusInfo;
1877
1878 static void exec_status_info_free(ExecStatusInfo *i) {
1879         assert(i);
1880
1881         free(i->name);
1882         free(i->path);
1883         strv_free(i->argv);
1884         free(i);
1885 }
1886
1887 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1888         uint64_t start_timestamp, exit_timestamp, start_timestamp_monotonic, exit_timestamp_monotonic;
1889         DBusMessageIter sub2, sub3;
1890         const char*path;
1891         unsigned n;
1892         uint32_t pid;
1893         int32_t code, status;
1894         dbus_bool_t ignore;
1895
1896         assert(i);
1897         assert(i);
1898
1899         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1900                 return -EIO;
1901
1902         dbus_message_iter_recurse(sub, &sub2);
1903
1904         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1905                 return -EIO;
1906
1907         if (!(i->path = strdup(path)))
1908                 return -ENOMEM;
1909
1910         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1911             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1912                 return -EIO;
1913
1914         n = 0;
1915         dbus_message_iter_recurse(&sub2, &sub3);
1916         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1917                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1918                 dbus_message_iter_next(&sub3);
1919                 n++;
1920         }
1921
1922
1923         if (!(i->argv = new0(char*, n+1)))
1924                 return -ENOMEM;
1925
1926         n = 0;
1927         dbus_message_iter_recurse(&sub2, &sub3);
1928         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1929                 const char *s;
1930
1931                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1932                 dbus_message_iter_get_basic(&sub3, &s);
1933                 dbus_message_iter_next(&sub3);
1934
1935                 if (!(i->argv[n++] = strdup(s)))
1936                         return -ENOMEM;
1937         }
1938
1939         if (!dbus_message_iter_next(&sub2) ||
1940             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1941             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1942             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp_monotonic, true) < 0 ||
1943             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1944             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp_monotonic, true) < 0 ||
1945             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1946             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1947             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1948                 return -EIO;
1949
1950         i->ignore = ignore;
1951         i->start_timestamp = (usec_t) start_timestamp;
1952         i->exit_timestamp = (usec_t) exit_timestamp;
1953         i->pid = (pid_t) pid;
1954         i->code = code;
1955         i->status = status;
1956
1957         return 0;
1958 }
1959
1960 typedef struct UnitStatusInfo {
1961         const char *id;
1962         const char *load_state;
1963         const char *active_state;
1964         const char *sub_state;
1965
1966         const char *description;
1967         const char *following;
1968
1969         const char *path;
1970         const char *default_control_group;
1971
1972         usec_t inactive_exit_timestamp;
1973         usec_t active_enter_timestamp;
1974         usec_t active_exit_timestamp;
1975         usec_t inactive_enter_timestamp;
1976
1977         bool need_daemon_reload;
1978
1979         /* Service */
1980         pid_t main_pid;
1981         pid_t control_pid;
1982         const char *status_text;
1983         bool running:1;
1984 #ifdef HAVE_SYSV_COMPAT
1985         bool is_sysv:1;
1986 #endif
1987
1988         usec_t start_timestamp;
1989         usec_t exit_timestamp;
1990
1991         int exit_code, exit_status;
1992
1993         usec_t condition_timestamp;
1994         bool condition_result;
1995
1996         /* Socket */
1997         unsigned n_accepted;
1998         unsigned n_connections;
1999         bool accept;
2000
2001         /* Device */
2002         const char *sysfs_path;
2003
2004         /* Mount, Automount */
2005         const char *where;
2006
2007         /* Swap */
2008         const char *what;
2009
2010         LIST_HEAD(ExecStatusInfo, exec);
2011 } UnitStatusInfo;
2012
2013 static void print_status_info(UnitStatusInfo *i) {
2014         ExecStatusInfo *p;
2015         const char *on, *off, *ss;
2016         usec_t timestamp;
2017         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
2018         char since2[FORMAT_TIMESTAMP_MAX], *s2;
2019
2020         assert(i);
2021
2022         /* This shows pretty information about a unit. See
2023          * print_property() for a low-level property printer */
2024
2025         printf("%s", strna(i->id));
2026
2027         if (i->description && !streq_ptr(i->id, i->description))
2028                 printf(" - %s", i->description);
2029
2030         printf("\n");
2031
2032         if (i->following)
2033                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
2034
2035         if (streq_ptr(i->load_state, "failed") ||
2036             streq_ptr(i->load_state, "banned")) {
2037                 on = ansi_highlight(true);
2038                 off = ansi_highlight(false);
2039         } else
2040                 on = off = "";
2041
2042         if (i->path)
2043                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
2044         else
2045                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
2046
2047         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
2048
2049         if (streq_ptr(i->active_state, "failed")) {
2050                 on = ansi_highlight(true);
2051                 off = ansi_highlight(false);
2052         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
2053                 on = ansi_highlight_green(true);
2054                 off = ansi_highlight_green(false);
2055         } else
2056                 on = off = "";
2057
2058         if (ss)
2059                 printf("\t  Active: %s%s (%s)%s",
2060                        on,
2061                        strna(i->active_state),
2062                        ss,
2063                        off);
2064         else
2065                 printf("\t  Active: %s%s%s",
2066                        on,
2067                        strna(i->active_state),
2068                        off);
2069
2070         timestamp = (streq_ptr(i->active_state, "active")      ||
2071                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
2072                     (streq_ptr(i->active_state, "inactive")    ||
2073                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
2074                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
2075                                                                   i->active_exit_timestamp;
2076
2077         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
2078         s2 = format_timestamp(since2, sizeof(since2), timestamp);
2079
2080         if (s1)
2081                 printf(" since %s; %s\n", s2, s1);
2082         else if (s2)
2083                 printf(" since %s\n", s2);
2084         else
2085                 printf("\n");
2086
2087         if (!i->condition_result && i->condition_timestamp > 0) {
2088                 s1 = format_timestamp_pretty(since1, sizeof(since1), i->condition_timestamp);
2089                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
2090
2091                 if (s1)
2092                         printf("\t          start condition failed at %s; %s\n", s2, s1);
2093                 else if (s2)
2094                         printf("\t          start condition failed at %s\n", s2);
2095         }
2096
2097         if (i->sysfs_path)
2098                 printf("\t  Device: %s\n", i->sysfs_path);
2099         if (i->where)
2100                 printf("\t   Where: %s\n", i->where);
2101         if (i->what)
2102                 printf("\t    What: %s\n", i->what);
2103
2104         if (i->accept)
2105                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
2106
2107         LIST_FOREACH(exec, p, i->exec) {
2108                 char *t;
2109                 bool good;
2110
2111                 /* Only show exited processes here */
2112                 if (p->code == 0)
2113                         continue;
2114
2115                 t = strv_join(p->argv, " ");
2116                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
2117                 free(t);
2118
2119 #ifdef HAVE_SYSV_COMPAT
2120                 if (i->is_sysv)
2121                         good = is_clean_exit_lsb(p->code, p->status);
2122                 else
2123 #endif
2124                         good = is_clean_exit(p->code, p->status);
2125
2126                 if (!good) {
2127                         on = ansi_highlight(true);
2128                         off = ansi_highlight(false);
2129                 } else
2130                         on = off = "";
2131
2132                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
2133
2134                 if (p->code == CLD_EXITED) {
2135                         const char *c;
2136
2137                         printf("status=%i", p->status);
2138
2139 #ifdef HAVE_SYSV_COMPAT
2140                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2141 #else
2142                         if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD)))
2143 #endif
2144                                 printf("/%s", c);
2145
2146                 } else
2147                         printf("signal=%s", signal_to_string(p->status));
2148
2149                 printf(")%s\n", off);
2150
2151                 on = off = NULL;
2152
2153                 if (i->main_pid == p->pid &&
2154                     i->start_timestamp == p->start_timestamp &&
2155                     i->exit_timestamp == p->start_timestamp)
2156                         /* Let's not show this twice */
2157                         i->main_pid = 0;
2158
2159                 if (p->pid == i->control_pid)
2160                         i->control_pid = 0;
2161         }
2162
2163         if (i->main_pid > 0 || i->control_pid > 0) {
2164                 printf("\t");
2165
2166                 if (i->main_pid > 0) {
2167                         printf("Main PID: %u", (unsigned) i->main_pid);
2168
2169                         if (i->running) {
2170                                 char *t = NULL;
2171                                 get_process_name(i->main_pid, &t);
2172                                 if (t) {
2173                                         printf(" (%s)", t);
2174                                         free(t);
2175                                 }
2176                         } else if (i->exit_code > 0) {
2177                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2178
2179                                 if (i->exit_code == CLD_EXITED) {
2180                                         const char *c;
2181
2182                                         printf("status=%i", i->exit_status);
2183
2184 #ifdef HAVE_SYSV_COMPAT
2185                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2186 #else
2187                                         if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD)))
2188 #endif
2189                                                 printf("/%s", c);
2190
2191                                 } else
2192                                         printf("signal=%s", signal_to_string(i->exit_status));
2193                                 printf(")");
2194                         }
2195                 }
2196
2197                 if (i->main_pid > 0 && i->control_pid > 0)
2198                         printf(";");
2199
2200                 if (i->control_pid > 0) {
2201                         char *t = NULL;
2202
2203                         printf(" Control: %u", (unsigned) i->control_pid);
2204
2205                         get_process_name(i->control_pid, &t);
2206                         if (t) {
2207                                 printf(" (%s)", t);
2208                                 free(t);
2209                         }
2210                 }
2211
2212                 printf("\n");
2213         }
2214
2215         if (i->status_text)
2216                 printf("\t  Status: \"%s\"\n", i->status_text);
2217
2218         if (i->default_control_group) {
2219                 unsigned c;
2220
2221                 printf("\t  CGroup: %s\n", i->default_control_group);
2222
2223                 if (arg_transport != TRANSPORT_SSH) {
2224                         if ((c = columns()) > 18)
2225                                 c -= 18;
2226                         else
2227                                 c = 0;
2228
2229                         show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
2230                 }
2231         }
2232
2233         if (i->need_daemon_reload)
2234                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2235                        ansi_highlight(true),
2236                        ansi_highlight(false),
2237                        arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
2238 }
2239
2240 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2241
2242         assert(name);
2243         assert(iter);
2244         assert(i);
2245
2246         switch (dbus_message_iter_get_arg_type(iter)) {
2247
2248         case DBUS_TYPE_STRING: {
2249                 const char *s;
2250
2251                 dbus_message_iter_get_basic(iter, &s);
2252
2253                 if (!isempty(s)) {
2254                         if (streq(name, "Id"))
2255                                 i->id = s;
2256                         else if (streq(name, "LoadState"))
2257                                 i->load_state = s;
2258                         else if (streq(name, "ActiveState"))
2259                                 i->active_state = s;
2260                         else if (streq(name, "SubState"))
2261                                 i->sub_state = s;
2262                         else if (streq(name, "Description"))
2263                                 i->description = s;
2264                         else if (streq(name, "FragmentPath"))
2265                                 i->path = s;
2266 #ifdef HAVE_SYSV_COMPAT
2267                         else if (streq(name, "SysVPath")) {
2268                                 i->is_sysv = true;
2269                                 i->path = s;
2270                         }
2271 #endif
2272                         else if (streq(name, "DefaultControlGroup"))
2273                                 i->default_control_group = s;
2274                         else if (streq(name, "StatusText"))
2275                                 i->status_text = s;
2276                         else if (streq(name, "SysFSPath"))
2277                                 i->sysfs_path = s;
2278                         else if (streq(name, "Where"))
2279                                 i->where = s;
2280                         else if (streq(name, "What"))
2281                                 i->what = s;
2282                         else if (streq(name, "Following"))
2283                                 i->following = s;
2284                 }
2285
2286                 break;
2287         }
2288
2289         case DBUS_TYPE_BOOLEAN: {
2290                 dbus_bool_t b;
2291
2292                 dbus_message_iter_get_basic(iter, &b);
2293
2294                 if (streq(name, "Accept"))
2295                         i->accept = b;
2296                 else if (streq(name, "NeedDaemonReload"))
2297                         i->need_daemon_reload = b;
2298                 else if (streq(name, "ConditionResult"))
2299                         i->condition_result = b;
2300
2301                 break;
2302         }
2303
2304         case DBUS_TYPE_UINT32: {
2305                 uint32_t u;
2306
2307                 dbus_message_iter_get_basic(iter, &u);
2308
2309                 if (streq(name, "MainPID")) {
2310                         if (u > 0) {
2311                                 i->main_pid = (pid_t) u;
2312                                 i->running = true;
2313                         }
2314                 } else if (streq(name, "ControlPID"))
2315                         i->control_pid = (pid_t) u;
2316                 else if (streq(name, "ExecMainPID")) {
2317                         if (u > 0)
2318                                 i->main_pid = (pid_t) u;
2319                 } else if (streq(name, "NAccepted"))
2320                         i->n_accepted = u;
2321                 else if (streq(name, "NConnections"))
2322                         i->n_connections = u;
2323
2324                 break;
2325         }
2326
2327         case DBUS_TYPE_INT32: {
2328                 int32_t j;
2329
2330                 dbus_message_iter_get_basic(iter, &j);
2331
2332                 if (streq(name, "ExecMainCode"))
2333                         i->exit_code = (int) j;
2334                 else if (streq(name, "ExecMainStatus"))
2335                         i->exit_status = (int) j;
2336
2337                 break;
2338         }
2339
2340         case DBUS_TYPE_UINT64: {
2341                 uint64_t u;
2342
2343                 dbus_message_iter_get_basic(iter, &u);
2344
2345                 if (streq(name, "ExecMainStartTimestamp"))
2346                         i->start_timestamp = (usec_t) u;
2347                 else if (streq(name, "ExecMainExitTimestamp"))
2348                         i->exit_timestamp = (usec_t) u;
2349                 else if (streq(name, "ActiveEnterTimestamp"))
2350                         i->active_enter_timestamp = (usec_t) u;
2351                 else if (streq(name, "InactiveEnterTimestamp"))
2352                         i->inactive_enter_timestamp = (usec_t) u;
2353                 else if (streq(name, "InactiveExitTimestamp"))
2354                         i->inactive_exit_timestamp = (usec_t) u;
2355                 else if (streq(name, "ActiveExitTimestamp"))
2356                         i->active_exit_timestamp = (usec_t) u;
2357                 else if (streq(name, "ConditionTimestamp"))
2358                         i->condition_timestamp = (usec_t) u;
2359
2360                 break;
2361         }
2362
2363         case DBUS_TYPE_ARRAY: {
2364
2365                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2366                     startswith(name, "Exec")) {
2367                         DBusMessageIter sub;
2368
2369                         dbus_message_iter_recurse(iter, &sub);
2370                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2371                                 ExecStatusInfo *info;
2372                                 int r;
2373
2374                                 if (!(info = new0(ExecStatusInfo, 1)))
2375                                         return -ENOMEM;
2376
2377                                 if (!(info->name = strdup(name))) {
2378                                         free(info);
2379                                         return -ENOMEM;
2380                                 }
2381
2382                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2383                                         free(info);
2384                                         return r;
2385                                 }
2386
2387                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2388
2389                                 dbus_message_iter_next(&sub);
2390                         }
2391                 }
2392
2393                 break;
2394         }
2395         }
2396
2397         return 0;
2398 }
2399
2400 static int print_property(const char *name, DBusMessageIter *iter) {
2401         assert(name);
2402         assert(iter);
2403
2404         /* This is a low-level property printer, see
2405          * print_status_info() for the nicer output */
2406
2407         if (arg_property && !strv_find(arg_property, name))
2408                 return 0;
2409
2410         switch (dbus_message_iter_get_arg_type(iter)) {
2411
2412         case DBUS_TYPE_STRUCT: {
2413                 DBusMessageIter sub;
2414                 dbus_message_iter_recurse(iter, &sub);
2415
2416                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2417                         uint32_t u;
2418
2419                         dbus_message_iter_get_basic(&sub, &u);
2420
2421                         if (u)
2422                                 printf("%s=%u\n", name, (unsigned) u);
2423                         else if (arg_all)
2424                                 printf("%s=\n", name);
2425
2426                         return 0;
2427                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2428                         const char *s;
2429
2430                         dbus_message_iter_get_basic(&sub, &s);
2431
2432                         if (arg_all || s[0])
2433                                 printf("%s=%s\n", name, s);
2434
2435                         return 0;
2436                 }
2437
2438                 break;
2439         }
2440
2441         case DBUS_TYPE_ARRAY:
2442
2443                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2444                         DBusMessageIter sub, sub2;
2445
2446                         dbus_message_iter_recurse(iter, &sub);
2447                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2448                                 const char *path;
2449                                 dbus_bool_t ignore;
2450
2451                                 dbus_message_iter_recurse(&sub, &sub2);
2452
2453                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2454                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2455                                         printf("EnvironmentFile=%s (ignore=%s)\n", path, yes_no(ignore));
2456
2457                                 dbus_message_iter_next(&sub);
2458                         }
2459
2460                         return 0;
2461
2462                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2463                         DBusMessageIter sub, sub2;
2464
2465                         dbus_message_iter_recurse(iter, &sub);
2466                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2467                                 const char *type, *path;
2468
2469                                 dbus_message_iter_recurse(&sub, &sub2);
2470
2471                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2472                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2473                                         printf("%s=%s\n", type, path);
2474
2475                                 dbus_message_iter_next(&sub);
2476                         }
2477
2478                         return 0;
2479
2480                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2481                         DBusMessageIter sub, sub2;
2482
2483                         dbus_message_iter_recurse(iter, &sub);
2484                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2485                                 const char *base;
2486                                 uint64_t value, next_elapse;
2487
2488                                 dbus_message_iter_recurse(&sub, &sub2);
2489
2490                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2491                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2492                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2493                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2494
2495                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2496                                                base,
2497                                                format_timespan(timespan1, sizeof(timespan1), value),
2498                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2499                                 }
2500
2501                                 dbus_message_iter_next(&sub);
2502                         }
2503
2504                         return 0;
2505
2506                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2507                         DBusMessageIter sub;
2508
2509                         dbus_message_iter_recurse(iter, &sub);
2510                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2511                                 ExecStatusInfo info;
2512
2513                                 zero(info);
2514                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2515                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2516                                         char *t;
2517
2518                                         t = strv_join(info.argv, " ");
2519
2520                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2521                                                name,
2522                                                strna(info.path),
2523                                                strna(t),
2524                                                yes_no(info.ignore),
2525                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2526                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2527                                                (unsigned) info. pid,
2528                                                sigchld_code_to_string(info.code),
2529                                                info.status,
2530                                                info.code == CLD_EXITED ? "" : "/",
2531                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2532
2533                                         free(t);
2534                                 }
2535
2536                                 free(info.path);
2537                                 strv_free(info.argv);
2538
2539                                 dbus_message_iter_next(&sub);
2540                         }
2541
2542                         return 0;
2543                 }
2544
2545                 break;
2546         }
2547
2548         if (generic_print_property(name, iter, arg_all) > 0)
2549                 return 0;
2550
2551         if (arg_all)
2552                 printf("%s=[unprintable]\n", name);
2553
2554         return 0;
2555 }
2556
2557 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2558         DBusMessage *m = NULL, *reply = NULL;
2559         const char *interface = "";
2560         int r;
2561         DBusError error;
2562         DBusMessageIter iter, sub, sub2, sub3;
2563         UnitStatusInfo info;
2564         ExecStatusInfo *p;
2565
2566         assert(bus);
2567         assert(path);
2568         assert(new_line);
2569
2570         zero(info);
2571         dbus_error_init(&error);
2572
2573         if (!(m = dbus_message_new_method_call(
2574                               "org.freedesktop.systemd1",
2575                               path,
2576                               "org.freedesktop.DBus.Properties",
2577                               "GetAll"))) {
2578                 log_error("Could not allocate message.");
2579                 r = -ENOMEM;
2580                 goto finish;
2581         }
2582
2583         if (!dbus_message_append_args(m,
2584                                       DBUS_TYPE_STRING, &interface,
2585                                       DBUS_TYPE_INVALID)) {
2586                 log_error("Could not append arguments to message.");
2587                 r = -ENOMEM;
2588                 goto finish;
2589         }
2590
2591         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2592                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2593                 r = -EIO;
2594                 goto finish;
2595         }
2596
2597         if (!dbus_message_iter_init(reply, &iter) ||
2598             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2599             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2600                 log_error("Failed to parse reply.");
2601                 r = -EIO;
2602                 goto finish;
2603         }
2604
2605         dbus_message_iter_recurse(&iter, &sub);
2606
2607         if (*new_line)
2608                 printf("\n");
2609
2610         *new_line = true;
2611
2612         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2613                 const char *name;
2614
2615                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2616                         log_error("Failed to parse reply.");
2617                         r = -EIO;
2618                         goto finish;
2619                 }
2620
2621                 dbus_message_iter_recurse(&sub, &sub2);
2622
2623                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2624                         log_error("Failed to parse reply.");
2625                         r = -EIO;
2626                         goto finish;
2627                 }
2628
2629                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2630                         log_error("Failed to parse reply.");
2631                         r = -EIO;
2632                         goto finish;
2633                 }
2634
2635                 dbus_message_iter_recurse(&sub2, &sub3);
2636
2637                 if (show_properties)
2638                         r = print_property(name, &sub3);
2639                 else
2640                         r = status_property(name, &sub3, &info);
2641
2642                 if (r < 0) {
2643                         log_error("Failed to parse reply.");
2644                         r = -EIO;
2645                         goto finish;
2646                 }
2647
2648                 dbus_message_iter_next(&sub);
2649         }
2650
2651         r = 0;
2652
2653         if (!show_properties)
2654                 print_status_info(&info);
2655
2656         if (!streq_ptr(info.active_state, "active") &&
2657             !streq_ptr(info.active_state, "reloading") &&
2658             streq(verb, "status"))
2659                 /* According to LSB: "program not running" */
2660                 r = 3;
2661
2662         while ((p = info.exec)) {
2663                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2664                 exec_status_info_free(p);
2665         }
2666
2667 finish:
2668         if (m)
2669                 dbus_message_unref(m);
2670
2671         if (reply)
2672                 dbus_message_unref(reply);
2673
2674         dbus_error_free(&error);
2675
2676         return r;
2677 }
2678
2679 static int show(DBusConnection *bus, char **args) {
2680         DBusMessage *m = NULL, *reply = NULL;
2681         int r, ret = 0;
2682         DBusError error;
2683         bool show_properties, new_line = false;
2684         char **name;
2685
2686         assert(bus);
2687         assert(args);
2688
2689         dbus_error_init(&error);
2690
2691         show_properties = !streq(args[0], "status");
2692
2693         if (show_properties)
2694                 pager_open_if_enabled();
2695
2696         if (show_properties && strv_length(args) <= 1) {
2697                 /* If not argument is specified inspect the manager
2698                  * itself */
2699
2700                 ret = show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2701                 goto finish;
2702         }
2703
2704         STRV_FOREACH(name, args+1) {
2705                 const char *path = NULL;
2706                 uint32_t id;
2707
2708                 if (safe_atou32(*name, &id) < 0) {
2709
2710                         /* Interpret as unit name */
2711
2712                         if (!(m = dbus_message_new_method_call(
2713                                               "org.freedesktop.systemd1",
2714                                               "/org/freedesktop/systemd1",
2715                                               "org.freedesktop.systemd1.Manager",
2716                                               "LoadUnit"))) {
2717                                 log_error("Could not allocate message.");
2718                                 ret = -ENOMEM;
2719                                 goto finish;
2720                         }
2721
2722                         if (!dbus_message_append_args(m,
2723                                                       DBUS_TYPE_STRING, name,
2724                                                       DBUS_TYPE_INVALID)) {
2725                                 log_error("Could not append arguments to message.");
2726                                 ret = -ENOMEM;
2727                                 goto finish;
2728                         }
2729
2730                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2731
2732                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2733                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2734                                         ret = -EIO;
2735                                         goto finish;
2736                                 }
2737
2738                                 dbus_error_free(&error);
2739
2740                                 dbus_message_unref(m);
2741                                 if (!(m = dbus_message_new_method_call(
2742                                                       "org.freedesktop.systemd1",
2743                                                       "/org/freedesktop/systemd1",
2744                                                       "org.freedesktop.systemd1.Manager",
2745                                                       "GetUnit"))) {
2746                                         log_error("Could not allocate message.");
2747                                         ret = -ENOMEM;
2748                                         goto finish;
2749                                 }
2750
2751                                 if (!dbus_message_append_args(m,
2752                                                               DBUS_TYPE_STRING, name,
2753                                                               DBUS_TYPE_INVALID)) {
2754                                         log_error("Could not append arguments to message.");
2755                                         ret = -ENOMEM;
2756                                         goto finish;
2757                                 }
2758
2759                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2760                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2761
2762                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2763                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2764                                         else
2765                                                 ret = -EIO;
2766                                         goto finish;
2767                                 }
2768                         }
2769
2770                 } else if (show_properties) {
2771
2772                         /* Interpret as job id */
2773
2774                         if (!(m = dbus_message_new_method_call(
2775                                               "org.freedesktop.systemd1",
2776                                               "/org/freedesktop/systemd1",
2777                                               "org.freedesktop.systemd1.Manager",
2778                                               "GetJob"))) {
2779                                 log_error("Could not allocate message.");
2780                                 ret = -ENOMEM;
2781                                 goto finish;
2782                         }
2783
2784                         if (!dbus_message_append_args(m,
2785                                                       DBUS_TYPE_UINT32, &id,
2786                                                       DBUS_TYPE_INVALID)) {
2787                                 log_error("Could not append arguments to message.");
2788                                 ret = -ENOMEM;
2789                                 goto finish;
2790                         }
2791
2792                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2793                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2794                                 ret = -EIO;
2795                                 goto finish;
2796                         }
2797                 } else {
2798
2799                         /* Interpret as PID */
2800
2801                         if (!(m = dbus_message_new_method_call(
2802                                               "org.freedesktop.systemd1",
2803                                               "/org/freedesktop/systemd1",
2804                                               "org.freedesktop.systemd1.Manager",
2805                                               "GetUnitByPID"))) {
2806                                 log_error("Could not allocate message.");
2807                                 ret = -ENOMEM;
2808                                 goto finish;
2809                         }
2810
2811                         if (!dbus_message_append_args(m,
2812                                                       DBUS_TYPE_UINT32, &id,
2813                                                       DBUS_TYPE_INVALID)) {
2814                                 log_error("Could not append arguments to message.");
2815                                 ret = -ENOMEM;
2816                                 goto finish;
2817                         }
2818
2819                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2820                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2821                                 ret = -EIO;
2822                                 goto finish;
2823                         }
2824                 }
2825
2826                 if (!dbus_message_get_args(reply, &error,
2827                                            DBUS_TYPE_OBJECT_PATH, &path,
2828                                            DBUS_TYPE_INVALID)) {
2829                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2830                         ret = -EIO;
2831                         goto finish;
2832                 }
2833
2834                 if ((r = show_one(args[0], bus, path, show_properties, &new_line)) != 0)
2835                         ret = r;
2836
2837                 dbus_message_unref(m);
2838                 dbus_message_unref(reply);
2839                 m = reply = NULL;
2840         }
2841
2842 finish:
2843         if (m)
2844                 dbus_message_unref(m);
2845
2846         if (reply)
2847                 dbus_message_unref(reply);
2848
2849         dbus_error_free(&error);
2850
2851         return ret;
2852 }
2853
2854 static int dump(DBusConnection *bus, char **args) {
2855         DBusMessage *m = NULL, *reply = NULL;
2856         DBusError error;
2857         int r;
2858         const char *text;
2859
2860         dbus_error_init(&error);
2861
2862         pager_open_if_enabled();
2863
2864         if (!(m = dbus_message_new_method_call(
2865                               "org.freedesktop.systemd1",
2866                               "/org/freedesktop/systemd1",
2867                               "org.freedesktop.systemd1.Manager",
2868                               "Dump"))) {
2869                 log_error("Could not allocate message.");
2870                 return -ENOMEM;
2871         }
2872
2873         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2874                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2875                 r = -EIO;
2876                 goto finish;
2877         }
2878
2879         if (!dbus_message_get_args(reply, &error,
2880                                    DBUS_TYPE_STRING, &text,
2881                                    DBUS_TYPE_INVALID)) {
2882                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2883                 r = -EIO;
2884                 goto finish;
2885         }
2886
2887         fputs(text, stdout);
2888
2889         r = 0;
2890
2891 finish:
2892         if (m)
2893                 dbus_message_unref(m);
2894
2895         if (reply)
2896                 dbus_message_unref(reply);
2897
2898         dbus_error_free(&error);
2899
2900         return r;
2901 }
2902
2903 static int snapshot(DBusConnection *bus, char **args) {
2904         DBusMessage *m = NULL, *reply = NULL;
2905         DBusError error;
2906         int r;
2907         const char *name = "", *path, *id;
2908         dbus_bool_t cleanup = FALSE;
2909         DBusMessageIter iter, sub;
2910         const char
2911                 *interface = "org.freedesktop.systemd1.Unit",
2912                 *property = "Id";
2913
2914         dbus_error_init(&error);
2915
2916         if (!(m = dbus_message_new_method_call(
2917                               "org.freedesktop.systemd1",
2918                               "/org/freedesktop/systemd1",
2919                               "org.freedesktop.systemd1.Manager",
2920                               "CreateSnapshot"))) {
2921                 log_error("Could not allocate message.");
2922                 return -ENOMEM;
2923         }
2924
2925         if (strv_length(args) > 1)
2926                 name = args[1];
2927
2928         if (!dbus_message_append_args(m,
2929                                       DBUS_TYPE_STRING, &name,
2930                                       DBUS_TYPE_BOOLEAN, &cleanup,
2931                                       DBUS_TYPE_INVALID)) {
2932                 log_error("Could not append arguments to message.");
2933                 r = -ENOMEM;
2934                 goto finish;
2935         }
2936
2937         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2938                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2939                 r = -EIO;
2940                 goto finish;
2941         }
2942
2943         if (!dbus_message_get_args(reply, &error,
2944                                    DBUS_TYPE_OBJECT_PATH, &path,
2945                                    DBUS_TYPE_INVALID)) {
2946                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2947                 r = -EIO;
2948                 goto finish;
2949         }
2950
2951         dbus_message_unref(m);
2952         if (!(m = dbus_message_new_method_call(
2953                               "org.freedesktop.systemd1",
2954                               path,
2955                               "org.freedesktop.DBus.Properties",
2956                               "Get"))) {
2957                 log_error("Could not allocate message.");
2958                 return -ENOMEM;
2959         }
2960
2961         if (!dbus_message_append_args(m,
2962                                       DBUS_TYPE_STRING, &interface,
2963                                       DBUS_TYPE_STRING, &property,
2964                                       DBUS_TYPE_INVALID)) {
2965                 log_error("Could not append arguments to message.");
2966                 r = -ENOMEM;
2967                 goto finish;
2968         }
2969
2970         dbus_message_unref(reply);
2971         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2972                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2973                 r = -EIO;
2974                 goto finish;
2975         }
2976
2977         if (!dbus_message_iter_init(reply, &iter) ||
2978             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2979                 log_error("Failed to parse reply.");
2980                 r = -EIO;
2981                 goto finish;
2982         }
2983
2984         dbus_message_iter_recurse(&iter, &sub);
2985
2986         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2987                 log_error("Failed to parse reply.");
2988                 r = -EIO;
2989                 goto finish;
2990         }
2991
2992         dbus_message_iter_get_basic(&sub, &id);
2993
2994         if (!arg_quiet)
2995                 puts(id);
2996         r = 0;
2997
2998 finish:
2999         if (m)
3000                 dbus_message_unref(m);
3001
3002         if (reply)
3003                 dbus_message_unref(reply);
3004
3005         dbus_error_free(&error);
3006
3007         return r;
3008 }
3009
3010 static int delete_snapshot(DBusConnection *bus, char **args) {
3011         DBusMessage *m = NULL, *reply = NULL;
3012         int r;
3013         DBusError error;
3014         char **name;
3015
3016         assert(bus);
3017         assert(args);
3018
3019         dbus_error_init(&error);
3020
3021         STRV_FOREACH(name, args+1) {
3022                 const char *path = NULL;
3023
3024                 if (!(m = dbus_message_new_method_call(
3025                                       "org.freedesktop.systemd1",
3026                                       "/org/freedesktop/systemd1",
3027                                       "org.freedesktop.systemd1.Manager",
3028                                       "GetUnit"))) {
3029                         log_error("Could not allocate message.");
3030                         r = -ENOMEM;
3031                         goto finish;
3032                 }
3033
3034                 if (!dbus_message_append_args(m,
3035                                               DBUS_TYPE_STRING, name,
3036                                               DBUS_TYPE_INVALID)) {
3037                         log_error("Could not append arguments to message.");
3038                         r = -ENOMEM;
3039                         goto finish;
3040                 }
3041
3042                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3043                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3044                         r = -EIO;
3045                         goto finish;
3046                 }
3047
3048                 if (!dbus_message_get_args(reply, &error,
3049                                            DBUS_TYPE_OBJECT_PATH, &path,
3050                                            DBUS_TYPE_INVALID)) {
3051                         log_error("Failed to parse reply: %s", bus_error_message(&error));
3052                         r = -EIO;
3053                         goto finish;
3054                 }
3055
3056                 dbus_message_unref(m);
3057                 if (!(m = dbus_message_new_method_call(
3058                                       "org.freedesktop.systemd1",
3059                                       path,
3060                                       "org.freedesktop.systemd1.Snapshot",
3061                                       "Remove"))) {
3062                         log_error("Could not allocate message.");
3063                         r = -ENOMEM;
3064                         goto finish;
3065                 }
3066
3067                 dbus_message_unref(reply);
3068                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3069                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3070                         r = -EIO;
3071                         goto finish;
3072                 }
3073
3074                 dbus_message_unref(m);
3075                 dbus_message_unref(reply);
3076                 m = reply = NULL;
3077         }
3078
3079         r = 0;
3080
3081 finish:
3082         if (m)
3083                 dbus_message_unref(m);
3084
3085         if (reply)
3086                 dbus_message_unref(reply);
3087
3088         dbus_error_free(&error);
3089
3090         return r;
3091 }
3092
3093 static int daemon_reload(DBusConnection *bus, char **args) {
3094         DBusMessage *m = NULL, *reply = NULL;
3095         DBusError error;
3096         int r;
3097         const char *method;
3098
3099         dbus_error_init(&error);
3100
3101         if (arg_action == ACTION_RELOAD)
3102                 method = "Reload";
3103         else if (arg_action == ACTION_REEXEC)
3104                 method = "Reexecute";
3105         else {
3106                 assert(arg_action == ACTION_SYSTEMCTL);
3107
3108                 method =
3109                         streq(args[0], "clear-jobs")    ||
3110                         streq(args[0], "cancel")        ? "ClearJobs" :
3111                         streq(args[0], "daemon-reexec") ? "Reexecute" :
3112                         streq(args[0], "reset-failed")  ? "ResetFailed" :
3113                         streq(args[0], "halt")          ? "Halt" :
3114                         streq(args[0], "poweroff")      ? "PowerOff" :
3115                         streq(args[0], "reboot")        ? "Reboot" :
3116                         streq(args[0], "kexec")         ? "KExec" :
3117                         streq(args[0], "exit")          ? "Exit" :
3118                                     /* "daemon-reload" */ "Reload";
3119         }
3120
3121         if (!(m = dbus_message_new_method_call(
3122                               "org.freedesktop.systemd1",
3123                               "/org/freedesktop/systemd1",
3124                               "org.freedesktop.systemd1.Manager",
3125                               method))) {
3126                 log_error("Could not allocate message.");
3127                 return -ENOMEM;
3128         }
3129
3130         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3131
3132                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
3133                         /* There's always a fallback possible for
3134                          * legacy actions. */
3135                         r = -EADDRNOTAVAIL;
3136                         goto finish;
3137                 }
3138
3139                 if (streq(method, "Reexecute") && dbus_error_has_name(&error, DBUS_ERROR_NO_REPLY)) {
3140                         /* On reexecution, we expect a disconnect, not
3141                          * a reply */
3142                         r = 0;
3143                         goto finish;
3144                 }
3145
3146                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3147                 r = -EIO;
3148                 goto finish;
3149         }
3150
3151         r = 0;
3152
3153 finish:
3154         if (m)
3155                 dbus_message_unref(m);
3156
3157         if (reply)
3158                 dbus_message_unref(reply);
3159
3160         dbus_error_free(&error);