chiark / gitweb /
systemctl: properly parse JobNew signals
[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
37 #include <dbus/dbus.h>
38
39 #include "log.h"
40 #include "util.h"
41 #include "macro.h"
42 #include "set.h"
43 #include "utmp-wtmp.h"
44 #include "special.h"
45 #include "initreq.h"
46 #include "strv.h"
47 #include "dbus-common.h"
48 #include "cgroup-show.h"
49 #include "cgroup-util.h"
50 #include "list.h"
51 #include "path-lookup.h"
52 #include "conf-parser.h"
53 #include "sd-daemon.h"
54 #include "shutdownd.h"
55 #include "exit-status.h"
56 #include "bus-errors.h"
57 #include "build.h"
58 #include "unit-name.h"
59
60 static const char *arg_type = NULL;
61 static char **arg_property = NULL;
62 static bool arg_all = false;
63 static const char *arg_job_mode = "replace";
64 static bool arg_user = false;
65 static bool arg_global = false;
66 static bool arg_immediate = false;
67 static bool arg_no_block = false;
68 static bool arg_no_pager = false;
69 static bool arg_no_wtmp = false;
70 static bool arg_no_sync = false;
71 static bool arg_no_wall = false;
72 static bool arg_no_reload = false;
73 static bool arg_dry = false;
74 static bool arg_quiet = false;
75 static bool arg_full = false;
76 static bool arg_force = false;
77 static bool arg_defaults = false;
78 static bool arg_ask_password = false;
79 static bool arg_failed = false;
80 static char **arg_wall = NULL;
81 static const char *arg_kill_who = NULL;
82 static const char *arg_kill_mode = NULL;
83 static int arg_signal = SIGTERM;
84 static usec_t arg_when = 0;
85 static enum action {
86         ACTION_INVALID,
87         ACTION_SYSTEMCTL,
88         ACTION_HALT,
89         ACTION_POWEROFF,
90         ACTION_REBOOT,
91         ACTION_KEXEC,
92         ACTION_EXIT,
93         ACTION_RUNLEVEL2,
94         ACTION_RUNLEVEL3,
95         ACTION_RUNLEVEL4,
96         ACTION_RUNLEVEL5,
97         ACTION_RESCUE,
98         ACTION_EMERGENCY,
99         ACTION_DEFAULT,
100         ACTION_RELOAD,
101         ACTION_REEXEC,
102         ACTION_RUNLEVEL,
103         ACTION_CANCEL_SHUTDOWN,
104         _ACTION_MAX
105 } arg_action = ACTION_SYSTEMCTL;
106 static enum dot {
107         DOT_ALL,
108         DOT_ORDER,
109         DOT_REQUIRE
110 } arg_dot = DOT_ALL;
111 static enum transport {
112         TRANSPORT_NORMAL,
113         TRANSPORT_SSH,
114         TRANSPORT_POLKIT
115 } arg_transport = TRANSPORT_NORMAL;
116 static const char *arg_host = NULL;
117
118 static bool private_bus = false;
119
120 static pid_t pager_pid = 0;
121 static pid_t agent_pid = 0;
122
123 static int daemon_reload(DBusConnection *bus, char **args, unsigned n);
124 static void pager_open(void);
125
126 static bool on_tty(void) {
127         static int t = -1;
128
129         /* Note that this is invoked relatively early, before we start
130          * the pager. That means the value we return reflects whether
131          * we originally were started on a tty, not if we currently
132          * are. But this is intended, since we want colour and so on
133          * when run in our own pager. */
134
135         if (_unlikely_(t < 0))
136                 t = isatty(STDOUT_FILENO) > 0;
137
138         return t;
139 }
140
141 static void spawn_ask_password_agent(void) {
142         pid_t parent;
143
144         if (agent_pid > 0)
145                 return;
146
147         /* We check STDIN here, not STDOUT, since this is about input,
148          * not output */
149         if (!isatty(STDIN_FILENO))
150                 return;
151
152         if (!arg_ask_password)
153                 return;
154
155         if (arg_user)
156                 return;
157
158         parent = getpid();
159
160         /* Spawns a temporary TTY agent, making sure it goes away when
161          * we go away */
162
163         if ((agent_pid = fork()) < 0)
164                 return;
165
166         if (agent_pid == 0) {
167                 /* In the child */
168
169                 int fd;
170                 bool stdout_is_tty, stderr_is_tty;
171
172                 /* Make sure the agent goes away when the parent dies */
173                 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
174                         _exit(EXIT_FAILURE);
175
176                 /* Check whether our parent died before we were able
177                  * to set the death signal */
178                 if (getppid() != parent)
179                         _exit(EXIT_SUCCESS);
180
181                 /* Don't leak fds to the agent */
182                 close_all_fds(NULL, 0);
183
184                 stdout_is_tty = isatty(STDOUT_FILENO);
185                 stderr_is_tty = isatty(STDERR_FILENO);
186
187                 if (!stdout_is_tty || !stderr_is_tty) {
188                         /* Detach from stdout/stderr. and reopen
189                          * /dev/tty for them. This is important to
190                          * ensure that when systemctl is started via
191                          * popen() or a similar call that expects to
192                          * read EOF we actually do generate EOF and
193                          * not delay this indefinitely by because we
194                          * keep an unused copy of stdin around. */
195                         if ((fd = open("/dev/tty", O_WRONLY)) < 0) {
196                                 log_error("Failed to open /dev/tty: %m");
197                                 _exit(EXIT_FAILURE);
198                         }
199
200                         if (!stdout_is_tty)
201                                 dup2(fd, STDOUT_FILENO);
202
203                         if (!stderr_is_tty)
204                                 dup2(fd, STDERR_FILENO);
205
206                         if (fd > 2)
207                                 close(fd);
208                 }
209
210                 execl(SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL);
211
212                 log_error("Unable to execute agent: %m");
213                 _exit(EXIT_FAILURE);
214         }
215 }
216
217 static const char *ansi_highlight(bool b) {
218
219         if (!on_tty())
220                 return "";
221
222         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
223 }
224
225 static const char *ansi_highlight_green(bool b) {
226
227         if (!on_tty())
228                 return "";
229
230         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
231 }
232
233 static bool error_is_no_service(const DBusError *error) {
234         assert(error);
235
236         if (!dbus_error_is_set(error))
237                 return false;
238
239         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
240                 return true;
241
242         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
243                 return true;
244
245         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
246 }
247
248 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
249         assert(error);
250
251         if (!dbus_error_is_set(error))
252                 return r;
253
254         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
255             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
256             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
257             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
258                 return EXIT_NOPERMISSION;
259
260         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
261                 return EXIT_NOTINSTALLED;
262
263         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
264             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
265                 return EXIT_NOTIMPLEMENTED;
266
267         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
268                 return EXIT_NOTCONFIGURED;
269
270         if (r != 0)
271                 return r;
272
273         return EXIT_FAILURE;
274 }
275
276 static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
277
278         assert(iter);
279         assert(data);
280
281         if (dbus_message_iter_get_arg_type(iter) != type)
282                 return -EIO;
283
284         dbus_message_iter_get_basic(iter, data);
285
286         if (!dbus_message_iter_next(iter) != !next)
287                 return -EIO;
288
289         return 0;
290 }
291
292 static void warn_wall(enum action action) {
293         static const char *table[_ACTION_MAX] = {
294                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
295                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
296                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
297                 [ACTION_KEXEC]     = "The system is going down for kexec reboot NOW!",
298                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
299                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
300         };
301
302         if (arg_no_wall)
303                 return;
304
305         if (arg_wall) {
306                 char *p;
307
308                 if (!(p = strv_join(arg_wall, " "))) {
309                         log_error("Failed to join strings.");
310                         return;
311                 }
312
313                 if (*p) {
314                         utmp_wall(p, NULL);
315                         free(p);
316                         return;
317                 }
318
319                 free(p);
320         }
321
322         if (!table[action])
323                 return;
324
325         utmp_wall(table[action], NULL);
326 }
327
328 struct unit_info {
329         const char *id;
330         const char *description;
331         const char *load_state;
332         const char *active_state;
333         const char *sub_state;
334         const char *following;
335         const char *unit_path;
336         uint32_t job_id;
337         const char *job_type;
338         const char *job_path;
339 };
340
341 static int compare_unit_info(const void *a, const void *b) {
342         const char *d1, *d2;
343         const struct unit_info *u = a, *v = b;
344
345         d1 = strrchr(u->id, '.');
346         d2 = strrchr(v->id, '.');
347
348         if (d1 && d2) {
349                 int r;
350
351                 if ((r = strcasecmp(d1, d2)) != 0)
352                         return r;
353         }
354
355         return strcasecmp(u->id, v->id);
356 }
357
358 static bool output_show_unit(const struct unit_info *u) {
359         const char *dot;
360
361         if (arg_failed)
362                 return streq(u->active_state, "failed");
363
364         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
365                               streq(dot+1, arg_type))) &&
366                 (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0);
367 }
368
369 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
370         unsigned active_len, sub_len, job_len, n_shown = 0;
371         const struct unit_info *u;
372
373         active_len = sizeof("ACTIVE")-1;
374         sub_len = sizeof("SUB")-1;
375         job_len = sizeof("JOB")-1;
376
377         for (u = unit_infos; u < unit_infos + c; u++) {
378                 if (!output_show_unit(u))
379                         continue;
380
381                 active_len = MAX(active_len, strlen(u->active_state));
382                 sub_len = MAX(sub_len, strlen(u->sub_state));
383                 if (u->job_id != 0)
384                         job_len = MAX(job_len, strlen(u->job_type));
385         }
386
387         if (on_tty()) {
388                 printf("%-25s %-6s %-*s %-*s %-*s", "UNIT", "LOAD",
389                        active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB");
390                 if (columns() >= 80+12 || arg_full || !arg_no_pager)
391                         printf(" %s\n", "DESCRIPTION");
392                 else
393                         printf("\n");
394         }
395
396         for (u = unit_infos; u < unit_infos + c; u++) {
397                 char *e;
398                 int a = 0, b = 0;
399                 const char *on_loaded, *off_loaded;
400                 const char *on_active, *off_active;
401
402                 if (!output_show_unit(u))
403                         continue;
404
405                 n_shown++;
406
407                 if (!streq(u->load_state, "loaded") &&
408                     !streq(u->load_state, "banned")) {
409                         on_loaded = ansi_highlight(true);
410                         off_loaded = ansi_highlight(false);
411                 } else
412                         on_loaded = off_loaded = "";
413
414                 if (streq(u->active_state, "failed")) {
415                         on_active = ansi_highlight(true);
416                         off_active = ansi_highlight(false);
417                 } else
418                         on_active = off_active = "";
419
420                 e = arg_full ? NULL : ellipsize(u->id, 25, 33);
421
422                 printf("%-25s %s%-6s%s %s%-*s %-*s%s%n",
423                        e ? e : u->id,
424                        on_loaded, u->load_state, off_loaded,
425                        on_active, active_len, u->active_state,
426                        sub_len, u->sub_state, off_active,
427                        &a);
428
429                 free(e);
430
431                 a -= strlen(on_loaded) + strlen(off_loaded);
432                 a -= strlen(on_active) + strlen(off_active);
433
434                 if (u->job_id != 0)
435                         printf(" %-*s", job_len, u->job_type);
436                 else
437                         b = 1 + job_len;
438
439                 if (a + b + 1 < columns()) {
440                         if (u->job_id == 0)
441                                 printf(" %-*s", job_len, "");
442
443                         if (arg_full || !arg_no_pager)
444                                 printf(" %s", u->description);
445                         else
446                                 printf(" %.*s", columns() - a - b - 1, u->description);
447                 }
448
449                 fputs("\n", stdout);
450         }
451
452         if (on_tty()) {
453                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
454                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
455                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
456                        "JOB    = Pending job for the unit.\n");
457
458                 if (arg_all)
459                         printf("\n%u units listed.\n", n_shown);
460                 else
461                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", n_shown);
462         }
463 }
464
465 static int list_units(DBusConnection *bus, char **args, unsigned n) {
466         DBusMessage *m = NULL, *reply = NULL;
467         DBusError error;
468         int r;
469         DBusMessageIter iter, sub, sub2;
470         unsigned c = 0, n_units = 0;
471         struct unit_info *unit_infos = NULL;
472
473         dbus_error_init(&error);
474
475         assert(bus);
476
477         pager_open();
478
479         if (!(m = dbus_message_new_method_call(
480                               "org.freedesktop.systemd1",
481                               "/org/freedesktop/systemd1",
482                               "org.freedesktop.systemd1.Manager",
483                               "ListUnits"))) {
484                 log_error("Could not allocate message.");
485                 return -ENOMEM;
486         }
487
488         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
489                 log_error("Failed to issue method call: %s", bus_error_message(&error));
490                 r = -EIO;
491                 goto finish;
492         }
493
494         if (!dbus_message_iter_init(reply, &iter) ||
495             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
496             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
497                 log_error("Failed to parse reply.");
498                 r = -EIO;
499                 goto finish;
500         }
501
502         dbus_message_iter_recurse(&iter, &sub);
503
504         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
505                 struct unit_info *u;
506
507                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
508                         log_error("Failed to parse reply.");
509                         r = -EIO;
510                         goto finish;
511                 }
512
513                 if (c >= n_units) {
514                         struct unit_info *w;
515
516                         n_units = MAX(2*c, 16);
517                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
518
519                         if (!w) {
520                                 log_error("Failed to allocate unit array.");
521                                 r = -ENOMEM;
522                                 goto finish;
523                         }
524
525                         unit_infos = w;
526                 }
527
528                 u = unit_infos+c;
529
530                 dbus_message_iter_recurse(&sub, &sub2);
531
532                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
533                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
534                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
535                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
536                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
537                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
538                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
539                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
540                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
541                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
542                         log_error("Failed to parse reply.");
543                         r = -EIO;
544                         goto finish;
545                 }
546
547                 dbus_message_iter_next(&sub);
548                 c++;
549         }
550
551         if (c > 0) {
552                 qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
553                 output_units_list(unit_infos, c);
554         }
555
556         r = 0;
557
558 finish:
559         if (m)
560                 dbus_message_unref(m);
561
562         if (reply)
563                 dbus_message_unref(reply);
564
565         free(unit_infos);
566
567         dbus_error_free(&error);
568
569         return r;
570 }
571
572 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
573         static const char * const colors[] = {
574                 "Requires",              "[color=\"black\"]",
575                 "RequiresOverridable",   "[color=\"black\"]",
576                 "Requisite",             "[color=\"darkblue\"]",
577                 "RequisiteOverridable",  "[color=\"darkblue\"]",
578                 "Wants",                 "[color=\"darkgrey\"]",
579                 "Conflicts",             "[color=\"red\"]",
580                 "ConflictedBy",          "[color=\"red\"]",
581                 "After",                 "[color=\"green\"]"
582         };
583
584         const char *c = NULL;
585         unsigned i;
586
587         assert(name);
588         assert(prop);
589         assert(iter);
590
591         for (i = 0; i < ELEMENTSOF(colors); i += 2)
592                 if (streq(colors[i], prop)) {
593                         c = colors[i+1];
594                         break;
595                 }
596
597         if (!c)
598                 return 0;
599
600         if (arg_dot != DOT_ALL)
601                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
602                         return 0;
603
604         switch (dbus_message_iter_get_arg_type(iter)) {
605
606         case DBUS_TYPE_ARRAY:
607
608                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
609                         DBusMessageIter sub;
610
611                         dbus_message_iter_recurse(iter, &sub);
612
613                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
614                                 const char *s;
615
616                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
617                                 dbus_message_iter_get_basic(&sub, &s);
618                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
619
620                                 dbus_message_iter_next(&sub);
621                         }
622
623                         return 0;
624                 }
625         }
626
627         return 0;
628 }
629
630 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
631         DBusMessage *m = NULL, *reply = NULL;
632         const char *interface = "org.freedesktop.systemd1.Unit";
633         int r;
634         DBusError error;
635         DBusMessageIter iter, sub, sub2, sub3;
636
637         assert(bus);
638         assert(path);
639
640         dbus_error_init(&error);
641
642         if (!(m = dbus_message_new_method_call(
643                               "org.freedesktop.systemd1",
644                               path,
645                               "org.freedesktop.DBus.Properties",
646                               "GetAll"))) {
647                 log_error("Could not allocate message.");
648                 r = -ENOMEM;
649                 goto finish;
650         }
651
652         if (!dbus_message_append_args(m,
653                                       DBUS_TYPE_STRING, &interface,
654                                       DBUS_TYPE_INVALID)) {
655                 log_error("Could not append arguments to message.");
656                 r = -ENOMEM;
657                 goto finish;
658         }
659
660         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
661                 log_error("Failed to issue method call: %s", bus_error_message(&error));
662                 r = -EIO;
663                 goto finish;
664         }
665
666         if (!dbus_message_iter_init(reply, &iter) ||
667             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
668             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
669                 log_error("Failed to parse reply.");
670                 r = -EIO;
671                 goto finish;
672         }
673
674         dbus_message_iter_recurse(&iter, &sub);
675
676         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
677                 const char *prop;
678
679                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
680                         log_error("Failed to parse reply.");
681                         r = -EIO;
682                         goto finish;
683                 }
684
685                 dbus_message_iter_recurse(&sub, &sub2);
686
687                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
688                         log_error("Failed to parse reply.");
689                         r = -EIO;
690                         goto finish;
691                 }
692
693                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
694                         log_error("Failed to parse reply.");
695                         r = -EIO;
696                         goto finish;
697                 }
698
699                 dbus_message_iter_recurse(&sub2, &sub3);
700
701                 if (dot_one_property(name, prop, &sub3)) {
702                         log_error("Failed to parse reply.");
703                         r = -EIO;
704                         goto finish;
705                 }
706
707                 dbus_message_iter_next(&sub);
708         }
709
710         r = 0;
711
712 finish:
713         if (m)
714                 dbus_message_unref(m);
715
716         if (reply)
717                 dbus_message_unref(reply);
718
719         dbus_error_free(&error);
720
721         return r;
722 }
723
724 static int dot(DBusConnection *bus, char **args, unsigned n) {
725         DBusMessage *m = NULL, *reply = NULL;
726         DBusError error;
727         int r;
728         DBusMessageIter iter, sub, sub2;
729
730         dbus_error_init(&error);
731
732         assert(bus);
733
734         if (!(m = dbus_message_new_method_call(
735                               "org.freedesktop.systemd1",
736                               "/org/freedesktop/systemd1",
737                               "org.freedesktop.systemd1.Manager",
738                               "ListUnits"))) {
739                 log_error("Could not allocate message.");
740                 return -ENOMEM;
741         }
742
743         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
744                 log_error("Failed to issue method call: %s", bus_error_message(&error));
745                 r = -EIO;
746                 goto finish;
747         }
748
749         if (!dbus_message_iter_init(reply, &iter) ||
750             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
751             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
752                 log_error("Failed to parse reply.");
753                 r = -EIO;
754                 goto finish;
755         }
756
757         printf("digraph systemd {\n");
758
759         dbus_message_iter_recurse(&iter, &sub);
760         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
761                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
762
763                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
764                         log_error("Failed to parse reply.");
765                         r = -EIO;
766                         goto finish;
767                 }
768
769                 dbus_message_iter_recurse(&sub, &sub2);
770
771                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
772                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
773                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
774                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
775                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
776                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
777                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
778                         log_error("Failed to parse reply.");
779                         r = -EIO;
780                         goto finish;
781                 }
782
783                 if ((r = dot_one(bus, id, unit_path)) < 0)
784                         goto finish;
785
786                 /* printf("\t\"%s\";\n", id); */
787                 dbus_message_iter_next(&sub);
788         }
789
790         printf("}\n");
791
792         log_info("   Color legend: black     = Requires\n"
793                  "                 dark blue = Requisite\n"
794                  "                 dark grey = Wants\n"
795                  "                 red       = Conflicts\n"
796                  "                 green     = After\n");
797
798         if (isatty(fileno(stdout)))
799                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
800                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
801
802         r = 0;
803
804 finish:
805         if (m)
806                 dbus_message_unref(m);
807
808         if (reply)
809                 dbus_message_unref(reply);
810
811         dbus_error_free(&error);
812
813         return r;
814 }
815
816 static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
817         DBusMessage *m = NULL, *reply = NULL;
818         DBusError error;
819         int r;
820         DBusMessageIter iter, sub, sub2;
821         unsigned k = 0;
822
823         dbus_error_init(&error);
824
825         assert(bus);
826
827         pager_open();
828
829         if (!(m = dbus_message_new_method_call(
830                               "org.freedesktop.systemd1",
831                               "/org/freedesktop/systemd1",
832                               "org.freedesktop.systemd1.Manager",
833                               "ListJobs"))) {
834                 log_error("Could not allocate message.");
835                 return -ENOMEM;
836         }
837
838         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
839                 log_error("Failed to issue method call: %s", bus_error_message(&error));
840                 r = -EIO;
841                 goto finish;
842         }
843
844         if (!dbus_message_iter_init(reply, &iter) ||
845             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
846             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
847                 log_error("Failed to parse reply.");
848                 r = -EIO;
849                 goto finish;
850         }
851
852         dbus_message_iter_recurse(&iter, &sub);
853
854         if (isatty(STDOUT_FILENO))
855                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
856
857         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
858                 const char *name, *type, *state, *job_path, *unit_path;
859                 uint32_t id;
860                 char *e;
861
862                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
863                         log_error("Failed to parse reply.");
864                         r = -EIO;
865                         goto finish;
866                 }
867
868                 dbus_message_iter_recurse(&sub, &sub2);
869
870                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
871                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
872                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
873                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
874                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
875                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
876                         log_error("Failed to parse reply.");
877                         r = -EIO;
878                         goto finish;
879                 }
880
881                 e = arg_full ? NULL : ellipsize(name, 25, 33);
882                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
883                 free(e);
884
885                 k++;
886
887                 dbus_message_iter_next(&sub);
888         }
889
890         if (isatty(STDOUT_FILENO))
891                 printf("\n%u jobs listed.\n", k);
892
893         r = 0;
894
895 finish:
896         if (m)
897                 dbus_message_unref(m);
898
899         if (reply)
900                 dbus_message_unref(reply);
901
902         dbus_error_free(&error);
903
904         return r;
905 }
906
907 static int load_unit(DBusConnection *bus, char **args, unsigned n) {
908         DBusMessage *m = NULL, *reply = NULL;
909         DBusError error;
910         int r;
911         unsigned i;
912
913         dbus_error_init(&error);
914
915         assert(bus);
916         assert(args);
917
918         for (i = 1; i < n; i++) {
919
920                 if (!(m = dbus_message_new_method_call(
921                                       "org.freedesktop.systemd1",
922                                       "/org/freedesktop/systemd1",
923                                       "org.freedesktop.systemd1.Manager",
924                                       "LoadUnit"))) {
925                         log_error("Could not allocate message.");
926                         r = -ENOMEM;
927                         goto finish;
928                 }
929
930                 if (!dbus_message_append_args(m,
931                                               DBUS_TYPE_STRING, &args[i],
932                                               DBUS_TYPE_INVALID)) {
933                         log_error("Could not append arguments to message.");
934                         r = -ENOMEM;
935                         goto finish;
936                 }
937
938                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
939                         log_error("Failed to issue method call: %s", bus_error_message(&error));
940                         r = -EIO;
941                         goto finish;
942                 }
943
944                 dbus_message_unref(m);
945                 dbus_message_unref(reply);
946
947                 m = reply = NULL;
948         }
949
950         r = 0;
951
952 finish:
953         if (m)
954                 dbus_message_unref(m);
955
956         if (reply)
957                 dbus_message_unref(reply);
958
959         dbus_error_free(&error);
960
961         return r;
962 }
963
964 static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
965         DBusMessage *m = NULL, *reply = NULL;
966         DBusError error;
967         int r;
968         unsigned i;
969
970         dbus_error_init(&error);
971
972         assert(bus);
973         assert(args);
974
975         if (n <= 1)
976                 return daemon_reload(bus, args, n);
977
978         for (i = 1; i < n; i++) {
979                 unsigned id;
980                 const char *path;
981
982                 if (!(m = dbus_message_new_method_call(
983                                       "org.freedesktop.systemd1",
984                                       "/org/freedesktop/systemd1",
985                                       "org.freedesktop.systemd1.Manager",
986                                       "GetJob"))) {
987                         log_error("Could not allocate message.");
988                         r = -ENOMEM;
989                         goto finish;
990                 }
991
992                 if ((r = safe_atou(args[i], &id)) < 0) {
993                         log_error("Failed to parse job id: %s", strerror(-r));
994                         goto finish;
995                 }
996
997                 assert_cc(sizeof(uint32_t) == sizeof(id));
998                 if (!dbus_message_append_args(m,
999                                               DBUS_TYPE_UINT32, &id,
1000                                               DBUS_TYPE_INVALID)) {
1001                         log_error("Could not append arguments to message.");
1002                         r = -ENOMEM;
1003                         goto finish;
1004                 }
1005
1006                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1007                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1008                         r = -EIO;
1009                         goto finish;
1010                 }
1011
1012                 if (!dbus_message_get_args(reply, &error,
1013                                            DBUS_TYPE_OBJECT_PATH, &path,
1014                                            DBUS_TYPE_INVALID)) {
1015                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1016                         r = -EIO;
1017                         goto finish;
1018                 }
1019
1020                 dbus_message_unref(m);
1021                 if (!(m = dbus_message_new_method_call(
1022                                       "org.freedesktop.systemd1",
1023                                       path,
1024                                       "org.freedesktop.systemd1.Job",
1025                                       "Cancel"))) {
1026                         log_error("Could not allocate message.");
1027                         r = -ENOMEM;
1028                         goto finish;
1029                 }
1030
1031                 dbus_message_unref(reply);
1032                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1033                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1034                         r = -EIO;
1035                         goto finish;
1036                 }
1037
1038                 dbus_message_unref(m);
1039                 dbus_message_unref(reply);
1040                 m = reply = NULL;
1041         }
1042
1043         r = 0;
1044
1045 finish:
1046         if (m)
1047                 dbus_message_unref(m);
1048
1049         if (reply)
1050                 dbus_message_unref(reply);
1051
1052         dbus_error_free(&error);
1053
1054         return r;
1055 }
1056
1057 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
1058         DBusMessage *m = NULL, *reply = NULL;
1059         dbus_bool_t b = FALSE;
1060         DBusMessageIter iter, sub;
1061         const char
1062                 *interface = "org.freedesktop.systemd1.Unit",
1063                 *property = "NeedDaemonReload",
1064                 *path;
1065
1066         /* We ignore all errors here, since this is used to show a warning only */
1067
1068         if (!(m = dbus_message_new_method_call(
1069                               "org.freedesktop.systemd1",
1070                               "/org/freedesktop/systemd1",
1071                               "org.freedesktop.systemd1.Manager",
1072                               "GetUnit")))
1073                 goto finish;
1074
1075         if (!dbus_message_append_args(m,
1076                                       DBUS_TYPE_STRING, &unit,
1077                                       DBUS_TYPE_INVALID))
1078                 goto finish;
1079
1080         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1081                 goto finish;
1082
1083         if (!dbus_message_get_args(reply, NULL,
1084                                    DBUS_TYPE_OBJECT_PATH, &path,
1085                                    DBUS_TYPE_INVALID))
1086                 goto finish;
1087
1088         dbus_message_unref(m);
1089         if (!(m = dbus_message_new_method_call(
1090                               "org.freedesktop.systemd1",
1091                               path,
1092                               "org.freedesktop.DBus.Properties",
1093                               "Get")))
1094                 goto finish;
1095
1096         if (!dbus_message_append_args(m,
1097                                       DBUS_TYPE_STRING, &interface,
1098                                       DBUS_TYPE_STRING, &property,
1099                                       DBUS_TYPE_INVALID)) {
1100                 goto finish;
1101         }
1102
1103         dbus_message_unref(reply);
1104         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1105                 goto finish;
1106
1107         if (!dbus_message_iter_init(reply, &iter) ||
1108             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1109                 goto finish;
1110
1111         dbus_message_iter_recurse(&iter, &sub);
1112
1113         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1114                 goto finish;
1115
1116         dbus_message_iter_get_basic(&sub, &b);
1117
1118 finish:
1119         if (m)
1120                 dbus_message_unref(m);
1121
1122         if (reply)
1123                 dbus_message_unref(reply);
1124
1125         return b;
1126 }
1127
1128 typedef struct WaitData {
1129         Set *set;
1130         char *result;
1131 } WaitData;
1132
1133 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1134         DBusError error;
1135         WaitData *d = data;
1136
1137         assert(connection);
1138         assert(message);
1139         assert(d);
1140
1141         dbus_error_init(&error);
1142
1143         log_debug("Got D-Bus request: %s.%s() on %s",
1144                   dbus_message_get_interface(message),
1145                   dbus_message_get_member(message),
1146                   dbus_message_get_path(message));
1147
1148         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1149                 log_error("Warning! D-Bus connection terminated.");
1150                 dbus_connection_close(connection);
1151
1152         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1153                 uint32_t id;
1154                 const char *path, *result;
1155                 dbus_bool_t success = true;
1156
1157                 if (dbus_message_get_args(message, &error,
1158                                           DBUS_TYPE_UINT32, &id,
1159                                           DBUS_TYPE_OBJECT_PATH, &path,
1160                                           DBUS_TYPE_STRING, &result,
1161                                           DBUS_TYPE_INVALID)) {
1162                         char *p;
1163
1164                         if ((p = set_remove(d->set, (char*) path)))
1165                                 free(p);
1166
1167                         if (*result)
1168                                 d->result = strdup(result);
1169
1170                         goto finish;
1171                 }
1172 #ifndef LEGACY
1173                 dbus_error_free(&error);
1174
1175                 if (dbus_message_get_args(message, &error,
1176                                           DBUS_TYPE_UINT32, &id,
1177                                           DBUS_TYPE_OBJECT_PATH, &path,
1178                                           DBUS_TYPE_BOOLEAN, &success,
1179                                           DBUS_TYPE_INVALID)) {
1180                         char *p;
1181
1182                         /* Compatibility with older systemd versions <
1183                          * 19 during upgrades. This should be dropped
1184                          * one day */
1185
1186                         if ((p = set_remove(d->set, (char*) path)))
1187                                 free(p);
1188
1189                         if (!success)
1190                                 d->result = strdup("failed");
1191
1192                         goto finish;
1193                 }
1194 #endif
1195
1196                 log_error("Failed to parse message: %s", bus_error_message(&error));
1197         }
1198
1199 finish:
1200         dbus_error_free(&error);
1201         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1202 }
1203
1204 static int enable_wait_for_jobs(DBusConnection *bus) {
1205         DBusError error;
1206
1207         assert(bus);
1208
1209         if (private_bus)
1210                 return 0;
1211
1212         dbus_error_init(&error);
1213         dbus_bus_add_match(bus,
1214                            "type='signal',"
1215                            "sender='org.freedesktop.systemd1',"
1216                            "interface='org.freedesktop.systemd1.Manager',"
1217                            "member='JobRemoved',"
1218                            "path='/org/freedesktop/systemd1'",
1219                            &error);
1220
1221         if (dbus_error_is_set(&error)) {
1222                 log_error("Failed to add match: %s", bus_error_message(&error));
1223                 dbus_error_free(&error);
1224                 return -EIO;
1225         }
1226
1227         /* This is slightly dirty, since we don't undo the match registrations. */
1228         return 0;
1229 }
1230
1231 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1232         int r;
1233         WaitData d;
1234
1235         assert(bus);
1236         assert(s);
1237
1238         zero(d);
1239         d.set = s;
1240
1241         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1242                 log_error("Failed to add filter.");
1243                 r = -ENOMEM;
1244                 goto finish;
1245         }
1246
1247         while (!set_isempty(s) &&
1248                dbus_connection_read_write_dispatch(bus, -1))
1249                 ;
1250
1251         if (!arg_quiet && d.result) {
1252                 if (streq(d.result, "timeout"))
1253                         log_error("Job timed out.");
1254                 else if (streq(d.result, "canceled"))
1255                         log_error("Job canceled.");
1256                 else if (streq(d.result, "dependency"))
1257                         log_error("A dependency job failed. See system logs for details.");
1258                 else if (!streq(d.result, "done") && !streq(d.result, "skipped"))
1259                         log_error("Job failed. See system logs and 'systemctl status' for details.");
1260         }
1261
1262         if (streq_ptr(d.result, "timeout"))
1263                 r = -ETIME;
1264         else if (streq_ptr(d.result, "canceled"))
1265                 r = -ECANCELED;
1266         else if (!streq_ptr(d.result, "done") && !streq_ptr(d.result, "skipped"))
1267                 r = -EIO;
1268         else
1269                 r = 0;
1270
1271         free(d.result);
1272
1273 finish:
1274         /* This is slightly dirty, since we don't undo the filter registration. */
1275
1276         return r;
1277 }
1278
1279 static int start_unit_one(
1280                 DBusConnection *bus,
1281                 const char *method,
1282                 const char *name,
1283                 const char *mode,
1284                 DBusError *error,
1285                 Set *s) {
1286
1287         DBusMessage *m = NULL, *reply = NULL;
1288         const char *path;
1289         int r;
1290
1291         assert(bus);
1292         assert(method);
1293         assert(name);
1294         assert(mode);
1295         assert(error);
1296         assert(arg_no_block || s);
1297
1298         if (!(m = dbus_message_new_method_call(
1299                               "org.freedesktop.systemd1",
1300                               "/org/freedesktop/systemd1",
1301                               "org.freedesktop.systemd1.Manager",
1302                               method))) {
1303                 log_error("Could not allocate message.");
1304                 r = -ENOMEM;
1305                 goto finish;
1306         }
1307
1308         if (!dbus_message_append_args(m,
1309                                       DBUS_TYPE_STRING, &name,
1310                                       DBUS_TYPE_STRING, &mode,
1311                                       DBUS_TYPE_INVALID)) {
1312                 log_error("Could not append arguments to message.");
1313                 r = -ENOMEM;
1314                 goto finish;
1315         }
1316
1317         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1318
1319                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1320                         /* There's always a fallback possible for
1321                          * legacy actions. */
1322                         r = -EADDRNOTAVAIL;
1323                         goto finish;
1324                 }
1325
1326                 log_error("Failed to issue method call: %s", bus_error_message(error));
1327                 r = -EIO;
1328                 goto finish;
1329         }
1330
1331         if (!dbus_message_get_args(reply, error,
1332                                    DBUS_TYPE_OBJECT_PATH, &path,
1333                                    DBUS_TYPE_INVALID)) {
1334                 log_error("Failed to parse reply: %s", bus_error_message(error));
1335                 r = -EIO;
1336                 goto finish;
1337         }
1338
1339         if (need_daemon_reload(bus, name))
1340                 log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1341                             arg_user ? "--user" : "--system");
1342
1343         if (!arg_no_block) {
1344                 char *p;
1345
1346                 if (!(p = strdup(path))) {
1347                         log_error("Failed to duplicate path.");
1348                         r = -ENOMEM;
1349                         goto finish;
1350                 }
1351
1352                 if ((r = set_put(s, p)) < 0) {
1353                         free(p);
1354                         log_error("Failed to add path to set.");
1355                         goto finish;
1356                 }
1357         }
1358
1359         r = 0;
1360
1361 finish:
1362         if (m)
1363                 dbus_message_unref(m);
1364
1365         if (reply)
1366                 dbus_message_unref(reply);
1367
1368         return r;
1369 }
1370
1371 static enum action verb_to_action(const char *verb) {
1372         if (streq(verb, "halt"))
1373                 return ACTION_HALT;
1374         else if (streq(verb, "poweroff"))
1375                 return ACTION_POWEROFF;
1376         else if (streq(verb, "reboot"))
1377                 return ACTION_REBOOT;
1378         else if (streq(verb, "kexec"))
1379                 return ACTION_KEXEC;
1380         else if (streq(verb, "rescue"))
1381                 return ACTION_RESCUE;
1382         else if (streq(verb, "emergency"))
1383                 return ACTION_EMERGENCY;
1384         else if (streq(verb, "default"))
1385                 return ACTION_DEFAULT;
1386         else if (streq(verb, "exit"))
1387                 return ACTION_EXIT;
1388         else
1389                 return ACTION_INVALID;
1390 }
1391
1392 static int start_unit(DBusConnection *bus, char **args, unsigned n) {
1393
1394         static const char * const table[_ACTION_MAX] = {
1395                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1396                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1397                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1398                 [ACTION_KEXEC] = SPECIAL_KEXEC_TARGET,
1399                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1400                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1401                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1402                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1403                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1404                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1405                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET,
1406                 [ACTION_EXIT] = SPECIAL_EXIT_TARGET
1407         };
1408
1409         int r, ret = 0;
1410         unsigned i;
1411         const char *method, *mode, *one_name;
1412         Set *s = NULL;
1413         DBusError error;
1414
1415         dbus_error_init(&error);
1416
1417         assert(bus);
1418
1419         spawn_ask_password_agent();
1420
1421         if (arg_action == ACTION_SYSTEMCTL) {
1422                 method =
1423                         streq(args[0], "stop") ||
1424                         streq(args[0], "condstop")              ? "StopUnit" :
1425                         streq(args[0], "reload")                ? "ReloadUnit" :
1426                         streq(args[0], "restart")               ? "RestartUnit" :
1427
1428                         streq(args[0], "try-restart")           ||
1429                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1430
1431                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1432
1433                         streq(args[0], "reload-or-try-restart") ||
1434                         streq(args[0], "condreload") ||
1435
1436                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1437                                                                   "StartUnit";
1438
1439                 mode =
1440                         (streq(args[0], "isolate") ||
1441                          streq(args[0], "rescue")  ||
1442                          streq(args[0], "emergency")) ? "isolate" : arg_job_mode;
1443
1444                 one_name = table[verb_to_action(args[0])];
1445
1446         } else {
1447                 assert(arg_action < ELEMENTSOF(table));
1448                 assert(table[arg_action]);
1449
1450                 method = "StartUnit";
1451
1452                 mode = (arg_action == ACTION_EMERGENCY ||
1453                         arg_action == ACTION_RESCUE ||
1454                         arg_action == ACTION_RUNLEVEL2 ||
1455                         arg_action == ACTION_RUNLEVEL3 ||
1456                         arg_action == ACTION_RUNLEVEL4 ||
1457                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1458
1459                 one_name = table[arg_action];
1460         }
1461
1462         if (!arg_no_block) {
1463                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1464                         log_error("Could not watch jobs: %s", strerror(-ret));
1465                         goto finish;
1466                 }
1467
1468                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1469                         log_error("Failed to allocate set.");
1470                         ret = -ENOMEM;
1471                         goto finish;
1472                 }
1473         }
1474
1475         if (one_name) {
1476                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1477                         goto finish;
1478         } else {
1479                 for (i = 1; i < n; i++)
1480                         if ((r = start_unit_one(bus, method, args[i], mode, &error, s)) != 0) {
1481                                 ret = translate_bus_error_to_exit_status(r, &error);
1482                                 dbus_error_free(&error);
1483                         }
1484         }
1485
1486         if (!arg_no_block)
1487                 if ((r = wait_for_jobs(bus, s)) < 0) {
1488                         ret = r;
1489                         goto finish;
1490                 }
1491
1492 finish:
1493         if (s)
1494                 set_free_free(s);
1495
1496         dbus_error_free(&error);
1497
1498         return ret;
1499 }
1500
1501 static int start_special(DBusConnection *bus, char **args, unsigned n) {
1502         int r;
1503
1504         assert(bus);
1505         assert(args);
1506
1507         if (arg_force &&
1508             (streq(args[0], "halt") ||
1509              streq(args[0], "poweroff") ||
1510              streq(args[0], "reboot") ||
1511              streq(args[0], "kexec") ||
1512              streq(args[0], "exit")))
1513                 return daemon_reload(bus, args, n);
1514
1515         r = start_unit(bus, args, n);
1516
1517         if (r >= 0)
1518                 warn_wall(verb_to_action(args[0]));
1519
1520         return r;
1521 }
1522
1523 static int check_unit(DBusConnection *bus, char **args, unsigned n) {
1524         DBusMessage *m = NULL, *reply = NULL;
1525         const char
1526                 *interface = "org.freedesktop.systemd1.Unit",
1527                 *property = "ActiveState";
1528         int r = 3; /* According to LSB: "program is not running" */
1529         DBusError error;
1530         unsigned i;
1531
1532         assert(bus);
1533         assert(args);
1534
1535         dbus_error_init(&error);
1536
1537         for (i = 1; i < n; i++) {
1538                 const char *path = NULL;
1539                 const char *state;
1540                 DBusMessageIter iter, sub;
1541
1542                 if (!(m = dbus_message_new_method_call(
1543                                       "org.freedesktop.systemd1",
1544                                       "/org/freedesktop/systemd1",
1545                                       "org.freedesktop.systemd1.Manager",
1546                                       "GetUnit"))) {
1547                         log_error("Could not allocate message.");
1548                         r = -ENOMEM;
1549                         goto finish;
1550                 }
1551
1552                 if (!dbus_message_append_args(m,
1553                                               DBUS_TYPE_STRING, &args[i],
1554                                               DBUS_TYPE_INVALID)) {
1555                         log_error("Could not append arguments to message.");
1556                         r = -ENOMEM;
1557                         goto finish;
1558                 }
1559
1560                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1561
1562                         /* Hmm, cannot figure out anything about this unit... */
1563                         if (!arg_quiet)
1564                                 puts("unknown");
1565
1566                         dbus_error_free(&error);
1567                         dbus_message_unref(m);
1568                         continue;
1569                 }
1570
1571                 if (!dbus_message_get_args(reply, &error,
1572                                            DBUS_TYPE_OBJECT_PATH, &path,
1573                                            DBUS_TYPE_INVALID)) {
1574                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1575                         r = -EIO;
1576                         goto finish;
1577                 }
1578
1579                 dbus_message_unref(m);
1580                 if (!(m = dbus_message_new_method_call(
1581                                       "org.freedesktop.systemd1",
1582                                       path,
1583                                       "org.freedesktop.DBus.Properties",
1584                                       "Get"))) {
1585                         log_error("Could not allocate message.");
1586                         r = -ENOMEM;
1587                         goto finish;
1588                 }
1589
1590                 if (!dbus_message_append_args(m,
1591                                               DBUS_TYPE_STRING, &interface,
1592                                               DBUS_TYPE_STRING, &property,
1593                                               DBUS_TYPE_INVALID)) {
1594                         log_error("Could not append arguments to message.");
1595                         r = -ENOMEM;
1596                         goto finish;
1597                 }
1598
1599                 dbus_message_unref(reply);
1600                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1601                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1602                         r = -EIO;
1603                         goto finish;
1604                 }
1605
1606                 if (!dbus_message_iter_init(reply, &iter) ||
1607                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1608                         log_error("Failed to parse reply.");
1609                         r = -EIO;
1610                         goto finish;
1611                 }
1612
1613                 dbus_message_iter_recurse(&iter, &sub);
1614
1615                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1616                         log_error("Failed to parse reply.");
1617                         r = -EIO;
1618                         goto finish;
1619                 }
1620
1621                 dbus_message_iter_get_basic(&sub, &state);
1622
1623                 if (!arg_quiet)
1624                         puts(state);
1625
1626                 if (streq(state, "active") || streq(state, "reloading"))
1627                         r = 0;
1628
1629                 dbus_message_unref(m);
1630                 dbus_message_unref(reply);
1631                 m = reply = NULL;
1632         }
1633
1634 finish:
1635         if (m)
1636                 dbus_message_unref(m);
1637
1638         if (reply)
1639                 dbus_message_unref(reply);
1640
1641         dbus_error_free(&error);
1642
1643         return r;
1644 }
1645
1646 static int kill_unit(DBusConnection *bus, char **args, unsigned n) {
1647         DBusMessage *m = NULL, *reply = NULL;
1648         int r = 0;
1649         DBusError error;
1650         unsigned i;
1651
1652         assert(bus);
1653         assert(args);
1654
1655         dbus_error_init(&error);
1656
1657         if (!arg_kill_who)
1658                 arg_kill_who = "all";
1659
1660         if (!arg_kill_mode)
1661                 arg_kill_mode = streq(arg_kill_who, "all") ? "control-group" : "process";
1662
1663         for (i = 1; i < n; i++) {
1664
1665                 if (!(m = dbus_message_new_method_call(
1666                                       "org.freedesktop.systemd1",
1667                                       "/org/freedesktop/systemd1",
1668                                       "org.freedesktop.systemd1.Manager",
1669                                       "KillUnit"))) {
1670                         log_error("Could not allocate message.");
1671                         r = -ENOMEM;
1672                         goto finish;
1673                 }
1674
1675                 if (!dbus_message_append_args(m,
1676                                               DBUS_TYPE_STRING, &args[i],
1677                                               DBUS_TYPE_STRING, &arg_kill_who,
1678                                               DBUS_TYPE_STRING, &arg_kill_mode,
1679                                               DBUS_TYPE_INT32, &arg_signal,
1680                                               DBUS_TYPE_INVALID)) {
1681                         log_error("Could not append arguments to message.");
1682                         r = -ENOMEM;
1683                         goto finish;
1684                 }
1685
1686                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1687                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1688                         dbus_error_free(&error);
1689                         r = -EIO;
1690                 }
1691
1692                 dbus_message_unref(m);
1693
1694                 if (reply)
1695                         dbus_message_unref(reply);
1696                 m = reply = NULL;
1697         }
1698
1699 finish:
1700         if (m)
1701                 dbus_message_unref(m);
1702
1703         if (reply)
1704                 dbus_message_unref(reply);
1705
1706         dbus_error_free(&error);
1707
1708         return r;
1709 }
1710
1711 typedef struct ExecStatusInfo {
1712         char *name;
1713
1714         char *path;
1715         char **argv;
1716
1717         bool ignore;
1718
1719         usec_t start_timestamp;
1720         usec_t exit_timestamp;
1721         pid_t pid;
1722         int code;
1723         int status;
1724
1725         LIST_FIELDS(struct ExecStatusInfo, exec);
1726 } ExecStatusInfo;
1727
1728 static void exec_status_info_free(ExecStatusInfo *i) {
1729         assert(i);
1730
1731         free(i->name);
1732         free(i->path);
1733         strv_free(i->argv);
1734         free(i);
1735 }
1736
1737 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1738         uint64_t start_timestamp, exit_timestamp;
1739         DBusMessageIter sub2, sub3;
1740         const char*path;
1741         unsigned n;
1742         uint32_t pid;
1743         int32_t code, status;
1744         dbus_bool_t ignore;
1745
1746         assert(i);
1747         assert(i);
1748
1749         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1750                 return -EIO;
1751
1752         dbus_message_iter_recurse(sub, &sub2);
1753
1754         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1755                 return -EIO;
1756
1757         if (!(i->path = strdup(path)))
1758                 return -ENOMEM;
1759
1760         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1761             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1762                 return -EIO;
1763
1764         n = 0;
1765         dbus_message_iter_recurse(&sub2, &sub3);
1766         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1767                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1768                 dbus_message_iter_next(&sub3);
1769                 n++;
1770         }
1771
1772
1773         if (!(i->argv = new0(char*, n+1)))
1774                 return -ENOMEM;
1775
1776         n = 0;
1777         dbus_message_iter_recurse(&sub2, &sub3);
1778         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1779                 const char *s;
1780
1781                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1782                 dbus_message_iter_get_basic(&sub3, &s);
1783                 dbus_message_iter_next(&sub3);
1784
1785                 if (!(i->argv[n++] = strdup(s)))
1786                         return -ENOMEM;
1787         }
1788
1789         if (!dbus_message_iter_next(&sub2) ||
1790             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1791             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1792             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1793             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1794             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1795             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1796                 return -EIO;
1797
1798         i->ignore = ignore;
1799         i->start_timestamp = (usec_t) start_timestamp;
1800         i->exit_timestamp = (usec_t) exit_timestamp;
1801         i->pid = (pid_t) pid;
1802         i->code = code;
1803         i->status = status;
1804
1805         return 0;
1806 }
1807
1808 typedef struct UnitStatusInfo {
1809         const char *id;
1810         const char *load_state;
1811         const char *active_state;
1812         const char *sub_state;
1813
1814         const char *description;
1815         const char *following;
1816
1817         const char *path;
1818         const char *default_control_group;
1819
1820         usec_t inactive_exit_timestamp;
1821         usec_t active_enter_timestamp;
1822         usec_t active_exit_timestamp;
1823         usec_t inactive_enter_timestamp;
1824
1825         bool need_daemon_reload;
1826
1827         /* Service */
1828         pid_t main_pid;
1829         pid_t control_pid;
1830         const char *status_text;
1831         bool running:1;
1832 #ifdef HAVE_SYSV_COMPAT
1833         bool is_sysv:1;
1834 #endif
1835
1836         usec_t start_timestamp;
1837         usec_t exit_timestamp;
1838
1839         int exit_code, exit_status;
1840
1841         usec_t condition_timestamp;
1842         bool condition_result;
1843
1844         /* Socket */
1845         unsigned n_accepted;
1846         unsigned n_connections;
1847         bool accept;
1848
1849         /* Device */
1850         const char *sysfs_path;
1851
1852         /* Mount, Automount */
1853         const char *where;
1854
1855         /* Swap */
1856         const char *what;
1857
1858         LIST_HEAD(ExecStatusInfo, exec);
1859 } UnitStatusInfo;
1860
1861 static void print_status_info(UnitStatusInfo *i) {
1862         ExecStatusInfo *p;
1863         const char *on, *off, *ss;
1864         usec_t timestamp;
1865         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
1866         char since2[FORMAT_TIMESTAMP_MAX], *s2;
1867
1868         assert(i);
1869
1870         /* This shows pretty information about a unit. See
1871          * print_property() for a low-level property printer */
1872
1873         printf("%s", strna(i->id));
1874
1875         if (i->description && !streq_ptr(i->id, i->description))
1876                 printf(" - %s", i->description);
1877
1878         printf("\n");
1879
1880         if (i->following)
1881                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
1882
1883         if (streq_ptr(i->load_state, "failed") ||
1884             streq_ptr(i->load_state, "banned")) {
1885                 on = ansi_highlight(true);
1886                 off = ansi_highlight(false);
1887         } else
1888                 on = off = "";
1889
1890         if (i->path)
1891                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
1892         else
1893                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
1894
1895         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1896
1897         if (streq_ptr(i->active_state, "failed")) {
1898                 on = ansi_highlight(true);
1899                 off = ansi_highlight(false);
1900         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1901                 on = ansi_highlight_green(true);
1902                 off = ansi_highlight_green(false);
1903         } else
1904                 on = off = "";
1905
1906         if (ss)
1907                 printf("\t  Active: %s%s (%s)%s",
1908                        on,
1909                        strna(i->active_state),
1910                        ss,
1911                        off);
1912         else
1913                 printf("\t  Active: %s%s%s",
1914                        on,
1915                        strna(i->active_state),
1916                        off);
1917
1918         timestamp = (streq_ptr(i->active_state, "active")      ||
1919                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
1920                     (streq_ptr(i->active_state, "inactive")    ||
1921                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
1922                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
1923                                                                   i->active_exit_timestamp;
1924
1925         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
1926         s2 = format_timestamp(since2, sizeof(since2), timestamp);
1927
1928         if (s1)
1929                 printf(" since %s; %s\n", s2, s1);
1930         else if (s2)
1931                 printf(" since %s\n", s2);
1932         else
1933                 printf("\n");
1934
1935         if (!i->condition_result && i->condition_timestamp > 0) {
1936                 s1 = format_timestamp_pretty(since1, sizeof(since1), i->condition_timestamp);
1937                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
1938
1939                 if (s1)
1940                         printf("\t          start condition failed at %s; %s\n", s2, s1);
1941                 else if (s2)
1942                         printf("\t          start condition failed at %s\n", s2);
1943         }
1944
1945         if (i->sysfs_path)
1946                 printf("\t  Device: %s\n", i->sysfs_path);
1947         if (i->where)
1948                 printf("\t   Where: %s\n", i->where);
1949         if (i->what)
1950                 printf("\t    What: %s\n", i->what);
1951
1952         if (i->accept)
1953                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1954
1955         LIST_FOREACH(exec, p, i->exec) {
1956                 char *t;
1957                 bool good;
1958
1959                 /* Only show exited processes here */
1960                 if (p->code == 0)
1961                         continue;
1962
1963                 t = strv_join(p->argv, " ");
1964                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
1965                 free(t);
1966
1967 #ifdef HAVE_SYSV_COMPAT
1968                 if (i->is_sysv)
1969                         good = is_clean_exit_lsb(p->code, p->status);
1970                 else
1971 #endif
1972                         good = is_clean_exit(p->code, p->status);
1973
1974                 if (!good) {
1975                         on = ansi_highlight(true);
1976                         off = ansi_highlight(false);
1977                 } else
1978                         on = off = "";
1979
1980                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
1981
1982                 if (p->code == CLD_EXITED) {
1983                         const char *c;
1984
1985                         printf("status=%i", p->status);
1986
1987 #ifdef HAVE_SYSV_COMPAT
1988                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1989 #else
1990                         if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD)))
1991 #endif
1992                                 printf("/%s", c);
1993
1994                 } else
1995                         printf("signal=%s", signal_to_string(p->status));
1996
1997                 printf(")%s\n", off);
1998
1999                 on = off = NULL;
2000
2001                 if (i->main_pid == p->pid &&
2002                     i->start_timestamp == p->start_timestamp &&
2003                     i->exit_timestamp == p->start_timestamp)
2004                         /* Let's not show this twice */
2005                         i->main_pid = 0;
2006
2007                 if (p->pid == i->control_pid)
2008                         i->control_pid = 0;
2009         }
2010
2011         if (i->main_pid > 0 || i->control_pid > 0) {
2012                 printf("\t");
2013
2014                 if (i->main_pid > 0) {
2015                         printf("Main PID: %u", (unsigned) i->main_pid);
2016
2017                         if (i->running) {
2018                                 char *t = NULL;
2019                                 get_process_name(i->main_pid, &t);
2020                                 if (t) {
2021                                         printf(" (%s)", t);
2022                                         free(t);
2023                                 }
2024                         } else if (i->exit_code > 0) {
2025                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2026
2027                                 if (i->exit_code == CLD_EXITED) {
2028                                         const char *c;
2029
2030                                         printf("status=%i", i->exit_status);
2031
2032 #ifdef HAVE_SYSV_COMPAT
2033                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2034 #else
2035                                         if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD)))
2036 #endif
2037                                                 printf("/%s", c);
2038
2039                                 } else
2040                                         printf("signal=%s", signal_to_string(i->exit_status));
2041                                 printf(")");
2042                         }
2043                 }
2044
2045                 if (i->main_pid > 0 && i->control_pid > 0)
2046                         printf(";");
2047
2048                 if (i->control_pid > 0) {
2049                         char *t = NULL;
2050
2051                         printf(" Control: %u", (unsigned) i->control_pid);
2052
2053                         get_process_name(i->control_pid, &t);
2054                         if (t) {
2055                                 printf(" (%s)", t);
2056                                 free(t);
2057                         }
2058                 }
2059
2060                 printf("\n");
2061         }
2062
2063         if (i->status_text)
2064                 printf("\t  Status: \"%s\"\n", i->status_text);
2065
2066         if (i->default_control_group) {
2067                 unsigned c;
2068
2069                 printf("\t  CGroup: %s\n", i->default_control_group);
2070
2071                 if (arg_transport != TRANSPORT_SSH) {
2072                         if ((c = columns()) > 18)
2073                                 c -= 18;
2074                         else
2075                                 c = 0;
2076
2077                         show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
2078                 }
2079         }
2080
2081         if (i->need_daemon_reload)
2082                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2083                        ansi_highlight(true),
2084                        ansi_highlight(false),
2085                        arg_user ? "--user" : "--system");
2086 }
2087
2088 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2089
2090         switch (dbus_message_iter_get_arg_type(iter)) {
2091
2092         case DBUS_TYPE_STRING: {
2093                 const char *s;
2094
2095                 dbus_message_iter_get_basic(iter, &s);
2096
2097                 if (s[0]) {
2098                         if (streq(name, "Id"))
2099                                 i->id = s;
2100                         else if (streq(name, "LoadState"))
2101                                 i->load_state = s;
2102                         else if (streq(name, "ActiveState"))
2103                                 i->active_state = s;
2104                         else if (streq(name, "SubState"))
2105                                 i->sub_state = s;
2106                         else if (streq(name, "Description"))
2107                                 i->description = s;
2108                         else if (streq(name, "FragmentPath"))
2109                                 i->path = s;
2110 #ifdef HAVE_SYSV_COMPAT
2111                         else if (streq(name, "SysVPath")) {
2112                                 i->is_sysv = true;
2113                                 i->path = s;
2114                         }
2115 #endif
2116                         else if (streq(name, "DefaultControlGroup"))
2117                                 i->default_control_group = s;
2118                         else if (streq(name, "StatusText"))
2119                                 i->status_text = s;
2120                         else if (streq(name, "SysFSPath"))
2121                                 i->sysfs_path = s;
2122                         else if (streq(name, "Where"))
2123                                 i->where = s;
2124                         else if (streq(name, "What"))
2125                                 i->what = s;
2126                         else if (streq(name, "Following"))
2127                                 i->following = s;
2128                 }
2129
2130                 break;
2131         }
2132
2133         case DBUS_TYPE_BOOLEAN: {
2134                 dbus_bool_t b;
2135
2136                 dbus_message_iter_get_basic(iter, &b);
2137
2138                 if (streq(name, "Accept"))
2139                         i->accept = b;
2140                 else if (streq(name, "NeedDaemonReload"))
2141                         i->need_daemon_reload = b;
2142                 else if (streq(name, "ConditionResult"))
2143                         i->condition_result = b;
2144
2145                 break;
2146         }
2147
2148         case DBUS_TYPE_UINT32: {
2149                 uint32_t u;
2150
2151                 dbus_message_iter_get_basic(iter, &u);
2152
2153                 if (streq(name, "MainPID")) {
2154                         if (u > 0) {
2155                                 i->main_pid = (pid_t) u;
2156                                 i->running = true;
2157                         }
2158                 } else if (streq(name, "ControlPID"))
2159                         i->control_pid = (pid_t) u;
2160                 else if (streq(name, "ExecMainPID")) {
2161                         if (u > 0)
2162                                 i->main_pid = (pid_t) u;
2163                 } else if (streq(name, "NAccepted"))
2164                         i->n_accepted = u;
2165                 else if (streq(name, "NConnections"))
2166                         i->n_connections = u;
2167
2168                 break;
2169         }
2170
2171         case DBUS_TYPE_INT32: {
2172                 int32_t j;
2173
2174                 dbus_message_iter_get_basic(iter, &j);
2175
2176                 if (streq(name, "ExecMainCode"))
2177                         i->exit_code = (int) j;
2178                 else if (streq(name, "ExecMainStatus"))
2179                         i->exit_status = (int) j;
2180
2181                 break;
2182         }
2183
2184         case DBUS_TYPE_UINT64: {
2185                 uint64_t u;
2186
2187                 dbus_message_iter_get_basic(iter, &u);
2188
2189                 if (streq(name, "ExecMainStartTimestamp"))
2190                         i->start_timestamp = (usec_t) u;
2191                 else if (streq(name, "ExecMainExitTimestamp"))
2192                         i->exit_timestamp = (usec_t) u;
2193                 else if (streq(name, "ActiveEnterTimestamp"))
2194                         i->active_enter_timestamp = (usec_t) u;
2195                 else if (streq(name, "InactiveEnterTimestamp"))
2196                         i->inactive_enter_timestamp = (usec_t) u;
2197                 else if (streq(name, "InactiveExitTimestamp"))
2198                         i->inactive_exit_timestamp = (usec_t) u;
2199                 else if (streq(name, "ActiveExitTimestamp"))
2200                         i->active_exit_timestamp = (usec_t) u;
2201                 else if (streq(name, "ConditionTimestamp"))
2202                         i->condition_timestamp = (usec_t) u;
2203
2204                 break;
2205         }
2206
2207         case DBUS_TYPE_ARRAY: {
2208
2209                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2210                     startswith(name, "Exec")) {
2211                         DBusMessageIter sub;
2212
2213                         dbus_message_iter_recurse(iter, &sub);
2214                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2215                                 ExecStatusInfo *info;
2216                                 int r;
2217
2218                                 if (!(info = new0(ExecStatusInfo, 1)))
2219                                         return -ENOMEM;
2220
2221                                 if (!(info->name = strdup(name))) {
2222                                         free(info);
2223                                         return -ENOMEM;
2224                                 }
2225
2226                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2227                                         free(info);
2228                                         return r;
2229                                 }
2230
2231                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2232
2233                                 dbus_message_iter_next(&sub);
2234                         }
2235                 }
2236
2237                 break;
2238         }
2239         }
2240
2241         return 0;
2242 }
2243
2244 static int print_property(const char *name, DBusMessageIter *iter) {
2245         assert(name);
2246         assert(iter);
2247
2248         /* This is a low-level property printer, see
2249          * print_status_info() for the nicer output */
2250
2251         if (arg_property && !strv_find(arg_property, name))
2252                 return 0;
2253
2254         switch (dbus_message_iter_get_arg_type(iter)) {
2255
2256         case DBUS_TYPE_STRING: {
2257                 const char *s;
2258                 dbus_message_iter_get_basic(iter, &s);
2259
2260                 if (arg_all || s[0])
2261                         printf("%s=%s\n", name, s);
2262
2263                 return 0;
2264         }
2265
2266         case DBUS_TYPE_BOOLEAN: {
2267                 dbus_bool_t b;
2268                 dbus_message_iter_get_basic(iter, &b);
2269                 printf("%s=%s\n", name, yes_no(b));
2270
2271                 return 0;
2272         }
2273
2274         case DBUS_TYPE_UINT64: {
2275                 uint64_t u;
2276                 dbus_message_iter_get_basic(iter, &u);
2277
2278                 /* Yes, heuristics! But we can change this check
2279                  * should it turn out to not be sufficient */
2280
2281                 if (strstr(name, "Timestamp")) {
2282                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
2283
2284                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
2285                                 printf("%s=%s\n", name, strempty(t));
2286                 } else if (strstr(name, "USec")) {
2287                         char timespan[FORMAT_TIMESPAN_MAX];
2288
2289                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
2290                 } else
2291                         printf("%s=%llu\n", name, (unsigned long long) u);
2292
2293                 return 0;
2294         }
2295
2296         case DBUS_TYPE_UINT32: {
2297                 uint32_t u;
2298                 dbus_message_iter_get_basic(iter, &u);
2299
2300                 if (strstr(name, "UMask") || strstr(name, "Mode"))
2301                         printf("%s=%04o\n", name, u);
2302                 else
2303                         printf("%s=%u\n", name, (unsigned) u);
2304
2305                 return 0;
2306         }
2307
2308         case DBUS_TYPE_INT32: {
2309                 int32_t i;
2310                 dbus_message_iter_get_basic(iter, &i);
2311
2312                 printf("%s=%i\n", name, (int) i);
2313                 return 0;
2314         }
2315
2316         case DBUS_TYPE_DOUBLE: {
2317                 double d;
2318                 dbus_message_iter_get_basic(iter, &d);
2319
2320                 printf("%s=%g\n", name, d);
2321                 return 0;
2322         }
2323
2324         case DBUS_TYPE_STRUCT: {
2325                 DBusMessageIter sub;
2326                 dbus_message_iter_recurse(iter, &sub);
2327
2328                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2329                         uint32_t u;
2330
2331                         dbus_message_iter_get_basic(&sub, &u);
2332
2333                         if (u)
2334                                 printf("%s=%u\n", name, (unsigned) u);
2335                         else if (arg_all)
2336                                 printf("%s=\n", name);
2337
2338                         return 0;
2339                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2340                         const char *s;
2341
2342                         dbus_message_iter_get_basic(&sub, &s);
2343
2344                         if (arg_all || s[0])
2345                                 printf("%s=%s\n", name, s);
2346
2347                         return 0;
2348                 }
2349
2350                 break;
2351         }
2352
2353         case DBUS_TYPE_ARRAY:
2354
2355                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
2356                         DBusMessageIter sub;
2357                         bool space = false;
2358
2359                         dbus_message_iter_recurse(iter, &sub);
2360                         if (arg_all ||
2361                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2362                                 printf("%s=", name);
2363
2364                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2365                                         const char *s;
2366
2367                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
2368                                         dbus_message_iter_get_basic(&sub, &s);
2369                                         printf("%s%s", space ? " " : "", s);
2370
2371                                         space = true;
2372                                         dbus_message_iter_next(&sub);
2373                                 }
2374
2375                                 puts("");
2376                         }
2377
2378                         return 0;
2379
2380                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
2381                         DBusMessageIter sub;
2382
2383                         dbus_message_iter_recurse(iter, &sub);
2384                         if (arg_all ||
2385                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2386                                 printf("%s=", name);
2387
2388                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2389                                         uint8_t u;
2390
2391                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
2392                                         dbus_message_iter_get_basic(&sub, &u);
2393                                         printf("%02x", u);
2394
2395                                         dbus_message_iter_next(&sub);
2396                                 }
2397
2398                                 puts("");
2399                         }
2400
2401                         return 0;
2402
2403                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2404                         DBusMessageIter sub, sub2;
2405
2406                         dbus_message_iter_recurse(iter, &sub);
2407                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2408                                 const char *path;
2409                                 dbus_bool_t ignore;
2410
2411                                 dbus_message_iter_recurse(&sub, &sub2);
2412
2413                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2414                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2415                                         printf("EnvironmentFile=%s (ignore=%s)\n", path, yes_no(ignore));
2416
2417                                 dbus_message_iter_next(&sub);
2418                         }
2419
2420                         return 0;
2421
2422                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2423                         DBusMessageIter sub, sub2;
2424
2425                         dbus_message_iter_recurse(iter, &sub);
2426                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2427                                 const char *type, *path;
2428
2429                                 dbus_message_iter_recurse(&sub, &sub2);
2430
2431                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2432                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2433                                         printf("%s=%s\n", type, path);
2434
2435                                 dbus_message_iter_next(&sub);
2436                         }
2437
2438                         return 0;
2439
2440                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2441                         DBusMessageIter sub, sub2;
2442
2443                         dbus_message_iter_recurse(iter, &sub);
2444                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2445                                 const char *base;
2446                                 uint64_t value, next_elapse;
2447
2448                                 dbus_message_iter_recurse(&sub, &sub2);
2449
2450                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2451                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2452                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2453                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2454
2455                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2456                                                base,
2457                                                format_timespan(timespan1, sizeof(timespan1), value),
2458                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2459                                 }
2460
2461                                 dbus_message_iter_next(&sub);
2462                         }
2463
2464                         return 0;
2465
2466                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2467                         DBusMessageIter sub;
2468
2469                         dbus_message_iter_recurse(iter, &sub);
2470                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2471                                 ExecStatusInfo info;
2472
2473                                 zero(info);
2474                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2475                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2476                                         char *t;
2477
2478                                         t = strv_join(info.argv, " ");
2479
2480                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2481                                                name,
2482                                                strna(info.path),
2483                                                strna(t),
2484                                                yes_no(info.ignore),
2485                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2486                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2487                                                (unsigned) info. pid,
2488                                                sigchld_code_to_string(info.code),
2489                                                info.status,
2490                                                info.code == CLD_EXITED ? "" : "/",
2491                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2492
2493                                         free(t);
2494                                 }
2495
2496                                 free(info.path);
2497                                 strv_free(info.argv);
2498
2499                                 dbus_message_iter_next(&sub);
2500                         }
2501
2502                         return 0;
2503                 }
2504
2505                 break;
2506         }
2507
2508         if (arg_all)
2509                 printf("%s=[unprintable]\n", name);
2510
2511         return 0;
2512 }
2513
2514 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2515         DBusMessage *m = NULL, *reply = NULL;
2516         const char *interface = "";
2517         int r;
2518         DBusError error;
2519         DBusMessageIter iter, sub, sub2, sub3;
2520         UnitStatusInfo info;
2521         ExecStatusInfo *p;
2522
2523         assert(bus);
2524         assert(path);
2525         assert(new_line);
2526
2527         zero(info);
2528         dbus_error_init(&error);
2529
2530         if (!(m = dbus_message_new_method_call(
2531                               "org.freedesktop.systemd1",
2532                               path,
2533                               "org.freedesktop.DBus.Properties",
2534                               "GetAll"))) {
2535                 log_error("Could not allocate message.");
2536                 r = -ENOMEM;
2537                 goto finish;
2538         }
2539
2540         if (!dbus_message_append_args(m,
2541                                       DBUS_TYPE_STRING, &interface,
2542                                       DBUS_TYPE_INVALID)) {
2543                 log_error("Could not append arguments to message.");
2544                 r = -ENOMEM;
2545                 goto finish;
2546         }
2547
2548         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2549                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2550                 r = -EIO;
2551                 goto finish;
2552         }
2553
2554         if (!dbus_message_iter_init(reply, &iter) ||
2555             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2556             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2557                 log_error("Failed to parse reply.");
2558                 r = -EIO;
2559                 goto finish;
2560         }
2561
2562         dbus_message_iter_recurse(&iter, &sub);
2563
2564         if (*new_line)
2565                 printf("\n");
2566
2567         *new_line = true;
2568
2569         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2570                 const char *name;
2571
2572                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2573                         log_error("Failed to parse reply.");
2574                         r = -EIO;
2575                         goto finish;
2576                 }
2577
2578                 dbus_message_iter_recurse(&sub, &sub2);
2579
2580                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2581                         log_error("Failed to parse reply.");
2582                         r = -EIO;
2583                         goto finish;
2584                 }
2585
2586                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2587                         log_error("Failed to parse reply.");
2588                         r = -EIO;
2589                         goto finish;
2590                 }
2591
2592                 dbus_message_iter_recurse(&sub2, &sub3);
2593
2594                 if (show_properties)
2595                         r = print_property(name, &sub3);
2596                 else
2597                         r = status_property(name, &sub3, &info);
2598
2599                 if (r < 0) {
2600                         log_error("Failed to parse reply.");
2601                         r = -EIO;
2602                         goto finish;
2603                 }
2604
2605                 dbus_message_iter_next(&sub);
2606         }
2607
2608         r = 0;
2609
2610         if (!show_properties)
2611                 print_status_info(&info);
2612
2613         if (!streq_ptr(info.active_state, "active") &&
2614             !streq_ptr(info.active_state, "reloading") &&
2615             streq(verb, "status"))
2616                 /* According to LSB: "program not running" */
2617                 r = 3;
2618
2619         while ((p = info.exec)) {
2620                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2621                 exec_status_info_free(p);
2622         }
2623
2624 finish:
2625         if (m)
2626                 dbus_message_unref(m);
2627
2628         if (reply)
2629                 dbus_message_unref(reply);
2630
2631         dbus_error_free(&error);
2632
2633         return r;
2634 }
2635
2636 static int show(DBusConnection *bus, char **args, unsigned n) {
2637         DBusMessage *m = NULL, *reply = NULL;
2638         int r, ret = 0;
2639         DBusError error;
2640         unsigned i;
2641         bool show_properties, new_line = false;
2642
2643         assert(bus);
2644         assert(args);
2645
2646         dbus_error_init(&error);
2647
2648         show_properties = !streq(args[0], "status");
2649
2650         if (show_properties)
2651                 pager_open();
2652
2653         if (show_properties && n <= 1) {
2654                 /* If not argument is specified inspect the manager
2655                  * itself */
2656
2657                 ret = show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2658                 goto finish;
2659         }
2660
2661         for (i = 1; i < n; i++) {
2662                 const char *path = NULL;
2663                 uint32_t id;
2664
2665                 if (safe_atou32(args[i], &id) < 0) {
2666
2667                         /* Interpret as unit name */
2668
2669                         if (!(m = dbus_message_new_method_call(
2670                                               "org.freedesktop.systemd1",
2671                                               "/org/freedesktop/systemd1",
2672                                               "org.freedesktop.systemd1.Manager",
2673                                               "LoadUnit"))) {
2674                                 log_error("Could not allocate message.");
2675                                 ret = -ENOMEM;
2676                                 goto finish;
2677                         }
2678
2679                         if (!dbus_message_append_args(m,
2680                                                       DBUS_TYPE_STRING, &args[i],
2681                                                       DBUS_TYPE_INVALID)) {
2682                                 log_error("Could not append arguments to message.");
2683                                 ret = -ENOMEM;
2684                                 goto finish;
2685                         }
2686
2687                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2688
2689                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2690                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2691                                         ret = -EIO;
2692                                         goto finish;
2693                                 }
2694
2695                                 dbus_error_free(&error);
2696
2697                                 dbus_message_unref(m);
2698                                 if (!(m = dbus_message_new_method_call(
2699                                                       "org.freedesktop.systemd1",
2700                                                       "/org/freedesktop/systemd1",
2701                                                       "org.freedesktop.systemd1.Manager",
2702                                                       "GetUnit"))) {
2703                                         log_error("Could not allocate message.");
2704                                         ret = -ENOMEM;
2705                                         goto finish;
2706                                 }
2707
2708                                 if (!dbus_message_append_args(m,
2709                                                               DBUS_TYPE_STRING, &args[i],
2710                                                               DBUS_TYPE_INVALID)) {
2711                                         log_error("Could not append arguments to message.");
2712                                         ret = -ENOMEM;
2713                                         goto finish;
2714                                 }
2715
2716                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2717                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2718
2719                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2720                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2721                                         else
2722                                                 ret = -EIO;
2723                                         goto finish;
2724                                 }
2725                         }
2726
2727                 } else if (show_properties) {
2728
2729                         /* Interpret as job id */
2730
2731                         if (!(m = dbus_message_new_method_call(
2732                                               "org.freedesktop.systemd1",
2733                                               "/org/freedesktop/systemd1",
2734                                               "org.freedesktop.systemd1.Manager",
2735                                               "GetJob"))) {
2736                                 log_error("Could not allocate message.");
2737                                 ret = -ENOMEM;
2738                                 goto finish;
2739                         }
2740
2741                         if (!dbus_message_append_args(m,
2742                                                       DBUS_TYPE_UINT32, &id,
2743                                                       DBUS_TYPE_INVALID)) {
2744                                 log_error("Could not append arguments to message.");
2745                                 ret = -ENOMEM;
2746                                 goto finish;
2747                         }
2748
2749                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2750                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2751                                 ret = -EIO;
2752                                 goto finish;
2753                         }
2754                 } else {
2755
2756                         /* Interpret as PID */
2757
2758                         if (!(m = dbus_message_new_method_call(
2759                                               "org.freedesktop.systemd1",
2760                                               "/org/freedesktop/systemd1",
2761                                               "org.freedesktop.systemd1.Manager",
2762                                               "GetUnitByPID"))) {
2763                                 log_error("Could not allocate message.");
2764                                 ret = -ENOMEM;
2765                                 goto finish;
2766                         }
2767
2768                         if (!dbus_message_append_args(m,
2769                                                       DBUS_TYPE_UINT32, &id,
2770                                                       DBUS_TYPE_INVALID)) {
2771                                 log_error("Could not append arguments to message.");
2772                                 ret = -ENOMEM;
2773                                 goto finish;
2774                         }
2775
2776                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2777                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2778                                 ret = -EIO;
2779                                 goto finish;
2780                         }
2781                 }
2782
2783                 if (!dbus_message_get_args(reply, &error,
2784                                            DBUS_TYPE_OBJECT_PATH, &path,
2785                                            DBUS_TYPE_INVALID)) {
2786                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2787                         ret = -EIO;
2788                         goto finish;
2789                 }
2790
2791                 if ((r = show_one(args[0], bus, path, show_properties, &new_line)) != 0)
2792                         ret = r;
2793
2794                 dbus_message_unref(m);
2795                 dbus_message_unref(reply);
2796                 m = reply = NULL;
2797         }
2798
2799 finish:
2800         if (m)
2801                 dbus_message_unref(m);
2802
2803         if (reply)
2804                 dbus_message_unref(reply);
2805
2806         dbus_error_free(&error);
2807
2808         return ret;
2809 }
2810
2811 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2812         DBusError error;
2813         DBusMessage *m = NULL, *reply = NULL;
2814
2815         assert(connection);
2816         assert(message);
2817
2818         dbus_error_init(&error);
2819
2820         log_debug("Got D-Bus request: %s.%s() on %s",
2821                   dbus_message_get_interface(message),
2822                   dbus_message_get_member(message),
2823                   dbus_message_get_path(message));
2824
2825         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2826                 log_error("Warning! D-Bus connection terminated.");
2827                 dbus_connection_close(connection);
2828
2829         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2830                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2831                 const char *id, *path;
2832
2833                 if (!dbus_message_get_args(message, &error,
2834                                            DBUS_TYPE_STRING, &id,
2835                                            DBUS_TYPE_OBJECT_PATH, &path,
2836                                            DBUS_TYPE_INVALID))
2837                         log_error("Failed to parse message: %s", bus_error_message(&error));
2838                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2839                         printf("Unit %s added.\n", id);
2840                 else
2841                         printf("Unit %s removed.\n", id);
2842
2843         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew")) {
2844                 uint32_t id;
2845                 const char *path;
2846
2847                 if (!dbus_message_get_args(message, &error,
2848                                            DBUS_TYPE_UINT32, &id,
2849                                            DBUS_TYPE_OBJECT_PATH, &path,
2850                                            DBUS_TYPE_INVALID))
2851                         log_error("Failed to parse message: %s", bus_error_message(&error));
2852                 else
2853                         printf("Job %u added.\n", id);
2854
2855
2856         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2857                 uint32_t id;
2858                 const char *path, *result;
2859
2860                 if (!dbus_message_get_args(message, &error,
2861                                            DBUS_TYPE_UINT32, &id,
2862                                            DBUS_TYPE_OBJECT_PATH, &path,
2863                                            DBUS_TYPE_STRING, &result,
2864                                            DBUS_TYPE_INVALID))
2865                         log_error("Failed to parse message: %s", bus_error_message(&error));
2866                 else
2867                         printf("Job %u removed (result=%s).\n", id, result);
2868
2869
2870         } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) {
2871
2872                 const char *path, *interface, *property = "Id";
2873                 DBusMessageIter iter, sub;
2874
2875                 path = dbus_message_get_path(message);
2876
2877                 if (!dbus_message_get_args(message, &error,
2878                                           DBUS_TYPE_STRING, &interface,
2879                                           DBUS_TYPE_INVALID)) {
2880                         log_error("Failed to parse message: %s", bus_error_message(&error));
2881                         goto finish;
2882                 }
2883
2884                 if (!streq(interface, "org.freedesktop.systemd1.Job") &&
2885                     !streq(interface, "org.freedesktop.systemd1.Unit"))
2886                         goto finish;
2887
2888                 if (!(m = dbus_message_new_method_call(
2889                               "org.freedesktop.systemd1",
2890                               path,
2891                               "org.freedesktop.DBus.Properties",
2892                               "Get"))) {
2893                         log_error("Could not allocate message.");
2894                         goto oom;
2895                 }
2896
2897                 if (!dbus_message_append_args(m,
2898                                               DBUS_TYPE_STRING, &interface,
2899                                               DBUS_TYPE_STRING, &property,
2900                                               DBUS_TYPE_INVALID)) {
2901                         log_error("Could not append arguments to message.");
2902                         goto finish;
2903                 }
2904
2905                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2906                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2907                         goto finish;
2908                 }
2909
2910                 if (!dbus_message_iter_init(reply, &iter) ||
2911                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2912                         log_error("Failed to parse reply.");
2913                         goto finish;
2914                 }
2915
2916                 dbus_message_iter_recurse(&iter, &sub);
2917
2918                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2919                         const char *id;
2920
2921                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2922                                 log_error("Failed to parse reply.");
2923                                 goto finish;
2924                         }
2925
2926                         dbus_message_iter_get_basic(&sub, &id);
2927                         printf("Unit %s changed.\n", id);
2928                 } else {
2929                         uint32_t id;
2930
2931                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2932                                 log_error("Failed to parse reply.");
2933                                 goto finish;
2934                         }
2935
2936                         dbus_message_iter_get_basic(&sub, &id);
2937                         printf("Job %u changed.\n", id);
2938                 }
2939         }
2940
2941 finish:
2942         if (m)
2943                 dbus_message_unref(m);
2944
2945         if (reply)
2946                 dbus_message_unref(reply);
2947
2948         dbus_error_free(&error);
2949         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2950
2951 oom:
2952         if (m)
2953                 dbus_message_unref(m);
2954
2955         if (reply)
2956                 dbus_message_unref(reply);
2957
2958         dbus_error_free(&error);
2959         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2960 }
2961
2962 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2963         DBusMessage *m = NULL, *reply = NULL;
2964         DBusError error;
2965         int r;
2966
2967         dbus_error_init(&error);
2968
2969         if (!private_bus) {
2970                 dbus_bus_add_match(bus,
2971                                    "type='signal',"
2972                                    "sender='org.freedesktop.systemd1',"
2973                                    "interface='org.freedesktop.systemd1.Manager',"
2974                                    "path='/org/freedesktop/systemd1'",
2975                                    &error);
2976
2977                 if (dbus_error_is_set(&error)) {
2978                         log_error("Failed to add match: %s", bus_error_message(&error));
2979                         r = -EIO;
2980                         goto finish;
2981                 }
2982
2983                 dbus_bus_add_match(bus,
2984                                    "type='signal',"
2985                                    "sender='org.freedesktop.systemd1',"
2986                                    "interface='org.freedesktop.DBus.Properties',"
2987                                    "member='PropertiesChanged'",
2988                                    &error);
2989
2990                 if (dbus_error_is_set(&error)) {
2991                         log_error("Failed to add match: %s", bus_error_message(&error));
2992                         r = -EIO;
2993                         goto finish;
2994                 }
2995         }
2996
2997         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
2998                 log_error("Failed to add filter.");
2999                 r = -ENOMEM;
3000                 goto finish;
3001         }
3002
3003         if (!(m = dbus_message_new_method_call(
3004                               "org.freedesktop.systemd1",
3005                               "/org/freedesktop/systemd1",
3006                               "org.freedesktop.systemd1.Manager",
3007                               "Subscribe"))) {
3008                 log_error("Could not allocate message.");
3009                 r = -ENOMEM;
3010                 goto finish;
3011         }
3012
3013         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3014                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3015                 r = -EIO;
3016                 goto finish;
3017         }
3018
3019         while (dbus_connection_read_write_dispatch(bus, -1))
3020                 ;
3021
3022         r = 0;
3023
3024 finish:
3025
3026         /* This is slightly dirty, since we don't undo the filter or the matches. */
3027
3028         if (m)
3029                 dbus_message_unref(m);
3030
3031         if (reply)
3032                 dbus_message_unref(reply);
3033
3034         dbus_error_free(&error);
3035
3036         return r;
3037 }
3038
3039 static int dump(DBusConnection *bus, char **args, unsigned n) {
3040         DBusMessage *m = NULL, *reply = NULL;
3041         DBusError error;
3042         int r;
3043         const char *text;
3044
3045         dbus_error_init(&error);
3046
3047         pager_open();
3048
3049         if (!(m = dbus_message_new_method_call(
3050                               "org.freedesktop.systemd1",
3051                               "/org/freedesktop/systemd1",
3052                               "org.freedesktop.systemd1.Manager",
3053                               "Dump"))) {
3054                 log_error("Could not allocate message.");
3055                 return -ENOMEM;
3056         }
3057
3058         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3059                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3060                 r = -EIO;
3061                 goto finish;
3062         }
3063
3064         if (!dbus_message_get_args(reply, &error,
3065                                    DBUS_TYPE_STRING, &text,
3066                                    DBUS_TYPE_INVALID)) {
3067                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3068                 r = -EIO;
3069                 goto finish;
3070         }
3071
3072         fputs(text, stdout);
3073
3074         r = 0;
3075
3076 finish:
3077         if (m)
3078                 dbus_message_unref(m);
3079
3080         if (reply)
3081                 dbus_message_unref(reply);
3082
3083         dbus_error_free(&error);
3084
3085         return r;
3086 }
3087
3088 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
3089         DBusMessage *m = NULL, *reply = NULL;
3090         DBusError error;
3091         int r;
3092         const char *name = "", *path, *id;
3093         dbus_bool_t cleanup = FALSE;
3094         DBusMessageIter iter, sub;
3095         const char
3096                 *interface = "org.freedesktop.systemd1.Unit",
3097                 *property = "Id";
3098
3099         dbus_error_init(&error);
3100
3101         if (!(m = dbus_message_new_method_call(
3102                               "org.freedesktop.systemd1",
3103                               "/org/freedesktop/systemd1",
3104                               "org.freedesktop.systemd1.Manager",
3105                               "CreateSnapshot"))) {
3106                 log_error("Could not allocate message.");
3107                 return -ENOMEM;
3108         }
3109
3110         if (n > 1)
3111                 name = args[1];
3112
3113         if (!dbus_message_append_args(m,
3114                                       DBUS_TYPE_STRING, &name,
3115                                       DBUS_TYPE_BOOLEAN, &cleanup,
3116                                       DBUS_TYPE_INVALID)) {
3117                 log_error("Could not append arguments to message.");
3118                 r = -ENOMEM;
3119                 goto finish;
3120         }
3121
3122         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3123                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3124                 r = -EIO;
3125                 goto finish;
3126         }
3127
3128         if (!dbus_message_get_args(reply, &error,
3129                                    DBUS_TYPE_OBJECT_PATH, &path,
3130                                    DBUS_TYPE_INVALID)) {
3131                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3132                 r = -EIO;
3133                 goto finish;
3134         }
3135
3136         dbus_message_unref(m);
3137         if (!(m = dbus_message_new_method_call(
3138                               "org.freedesktop.systemd1",
3139                               path,
3140                               "org.freedesktop.DBus.Properties",
3141                               "Get"))) {
3142                 log_error("Could not allocate message.");