chiark / gitweb /
5db094fc159a65ea6212c616c42df435522db595
[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)
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)
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")                  ? "StopUnit" :
1424                         streq(args[0], "reload")                ? "ReloadUnit" :
1425                         streq(args[0], "restart")               ? "RestartUnit" :
1426
1427                         streq(args[0], "try-restart")           ||
1428                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1429
1430                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1431
1432                         streq(args[0], "reload-or-try-restart") ||
1433                         streq(args[0], "condreload") ||
1434
1435                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1436                                                                   "StartUnit";
1437
1438                 mode =
1439                         (streq(args[0], "isolate") ||
1440                          streq(args[0], "rescue")  ||
1441                          streq(args[0], "emergency")) ? "isolate" : arg_job_mode;
1442
1443                 one_name = table[verb_to_action(args[0])];
1444
1445         } else {
1446                 assert(arg_action < ELEMENTSOF(table));
1447                 assert(table[arg_action]);
1448
1449                 method = "StartUnit";
1450
1451                 mode = (arg_action == ACTION_EMERGENCY ||
1452                         arg_action == ACTION_RESCUE ||
1453                         arg_action == ACTION_RUNLEVEL2 ||
1454                         arg_action == ACTION_RUNLEVEL3 ||
1455                         arg_action == ACTION_RUNLEVEL4 ||
1456                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1457
1458                 one_name = table[arg_action];
1459         }
1460
1461         if (!arg_no_block) {
1462                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1463                         log_error("Could not watch jobs: %s", strerror(-ret));
1464                         goto finish;
1465                 }
1466
1467                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1468                         log_error("Failed to allocate set.");
1469                         ret = -ENOMEM;
1470                         goto finish;
1471                 }
1472         }
1473
1474         if (one_name) {
1475                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1476                         goto finish;
1477         } else {
1478                 for (i = 1; i < n; i++)
1479                         if ((r = start_unit_one(bus, method, args[i], mode, &error, s)) != 0) {
1480                                 ret = translate_bus_error_to_exit_status(r, &error);
1481                                 dbus_error_free(&error);
1482                         }
1483         }
1484
1485         if (!arg_no_block)
1486                 if ((r = wait_for_jobs(bus, s)) < 0) {
1487                         ret = r;
1488                         goto finish;
1489                 }
1490
1491 finish:
1492         if (s)
1493                 set_free_free(s);
1494
1495         dbus_error_free(&error);
1496
1497         return ret;
1498 }
1499
1500 static int start_special(DBusConnection *bus, char **args, unsigned n) {
1501         int r;
1502
1503         assert(bus);
1504         assert(args);
1505
1506         if (arg_force &&
1507             (streq(args[0], "halt") ||
1508              streq(args[0], "poweroff") ||
1509              streq(args[0], "reboot") ||
1510              streq(args[0], "kexec") ||
1511              streq(args[0], "exit")))
1512                 return daemon_reload(bus, args, n);
1513
1514         r = start_unit(bus, args, n);
1515
1516         if (r >= 0)
1517                 warn_wall(verb_to_action(args[0]));
1518
1519         return r;
1520 }
1521
1522 static int check_unit(DBusConnection *bus, char **args, unsigned n) {
1523         DBusMessage *m = NULL, *reply = NULL;
1524         const char
1525                 *interface = "org.freedesktop.systemd1.Unit",
1526                 *property = "ActiveState";
1527         int r = 3; /* According to LSB: "program is not running" */
1528         DBusError error;
1529         unsigned i;
1530
1531         assert(bus);
1532         assert(args);
1533
1534         dbus_error_init(&error);
1535
1536         for (i = 1; i < n; i++) {
1537                 const char *path = NULL;
1538                 const char *state;
1539                 DBusMessageIter iter, sub;
1540
1541                 if (!(m = dbus_message_new_method_call(
1542                                       "org.freedesktop.systemd1",
1543                                       "/org/freedesktop/systemd1",
1544                                       "org.freedesktop.systemd1.Manager",
1545                                       "GetUnit"))) {
1546                         log_error("Could not allocate message.");
1547                         r = -ENOMEM;
1548                         goto finish;
1549                 }
1550
1551                 if (!dbus_message_append_args(m,
1552                                               DBUS_TYPE_STRING, &args[i],
1553                                               DBUS_TYPE_INVALID)) {
1554                         log_error("Could not append arguments to message.");
1555                         r = -ENOMEM;
1556                         goto finish;
1557                 }
1558
1559                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1560
1561                         /* Hmm, cannot figure out anything about this unit... */
1562                         if (!arg_quiet)
1563                                 puts("unknown");
1564
1565                         dbus_error_free(&error);
1566                         dbus_message_unref(m);
1567                         continue;
1568                 }
1569
1570                 if (!dbus_message_get_args(reply, &error,
1571                                            DBUS_TYPE_OBJECT_PATH, &path,
1572                                            DBUS_TYPE_INVALID)) {
1573                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1574                         r = -EIO;
1575                         goto finish;
1576                 }
1577
1578                 dbus_message_unref(m);
1579                 if (!(m = dbus_message_new_method_call(
1580                                       "org.freedesktop.systemd1",
1581                                       path,
1582                                       "org.freedesktop.DBus.Properties",
1583                                       "Get"))) {
1584                         log_error("Could not allocate message.");
1585                         r = -ENOMEM;
1586                         goto finish;
1587                 }
1588
1589                 if (!dbus_message_append_args(m,
1590                                               DBUS_TYPE_STRING, &interface,
1591                                               DBUS_TYPE_STRING, &property,
1592                                               DBUS_TYPE_INVALID)) {
1593                         log_error("Could not append arguments to message.");
1594                         r = -ENOMEM;
1595                         goto finish;
1596                 }
1597
1598                 dbus_message_unref(reply);
1599                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1600                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1601                         r = -EIO;
1602                         goto finish;
1603                 }
1604
1605                 if (!dbus_message_iter_init(reply, &iter) ||
1606                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1607                         log_error("Failed to parse reply.");
1608                         r = -EIO;
1609                         goto finish;
1610                 }
1611
1612                 dbus_message_iter_recurse(&iter, &sub);
1613
1614                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1615                         log_error("Failed to parse reply.");
1616                         r = -EIO;
1617                         goto finish;
1618                 }
1619
1620                 dbus_message_iter_get_basic(&sub, &state);
1621
1622                 if (!arg_quiet)
1623                         puts(state);
1624
1625                 if (streq(state, "active") || streq(state, "reloading"))
1626                         r = 0;
1627
1628                 dbus_message_unref(m);
1629                 dbus_message_unref(reply);
1630                 m = reply = NULL;
1631         }
1632
1633 finish:
1634         if (m)
1635                 dbus_message_unref(m);
1636
1637         if (reply)
1638                 dbus_message_unref(reply);
1639
1640         dbus_error_free(&error);
1641
1642         return r;
1643 }
1644
1645 static int kill_unit(DBusConnection *bus, char **args, unsigned n) {
1646         DBusMessage *m = NULL, *reply = NULL;
1647         int r = 0;
1648         DBusError error;
1649         unsigned i;
1650
1651         assert(bus);
1652         assert(args);
1653
1654         dbus_error_init(&error);
1655
1656         if (!arg_kill_who)
1657                 arg_kill_who = "all";
1658
1659         if (!arg_kill_mode)
1660                 arg_kill_mode = streq(arg_kill_who, "all") ? "control-group" : "process";
1661
1662         for (i = 1; i < n; i++) {
1663
1664                 if (!(m = dbus_message_new_method_call(
1665                                       "org.freedesktop.systemd1",
1666                                       "/org/freedesktop/systemd1",
1667                                       "org.freedesktop.systemd1.Manager",
1668                                       "KillUnit"))) {
1669                         log_error("Could not allocate message.");
1670                         r = -ENOMEM;
1671                         goto finish;
1672                 }
1673
1674                 if (!dbus_message_append_args(m,
1675                                               DBUS_TYPE_STRING, &args[i],
1676                                               DBUS_TYPE_STRING, &arg_kill_who,
1677                                               DBUS_TYPE_STRING, &arg_kill_mode,
1678                                               DBUS_TYPE_INT32, &arg_signal,
1679                                               DBUS_TYPE_INVALID)) {
1680                         log_error("Could not append arguments to message.");
1681                         r = -ENOMEM;
1682                         goto finish;
1683                 }
1684
1685                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1686                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1687                         dbus_error_free(&error);
1688                         r = -EIO;
1689                 }
1690
1691                 dbus_message_unref(m);
1692
1693                 if (reply)
1694                         dbus_message_unref(reply);
1695                 m = reply = NULL;
1696         }
1697
1698 finish:
1699         if (m)
1700                 dbus_message_unref(m);
1701
1702         if (reply)
1703                 dbus_message_unref(reply);
1704
1705         dbus_error_free(&error);
1706
1707         return r;
1708 }
1709
1710 typedef struct ExecStatusInfo {
1711         char *name;
1712
1713         char *path;
1714         char **argv;
1715
1716         bool ignore;
1717
1718         usec_t start_timestamp;
1719         usec_t exit_timestamp;
1720         pid_t pid;
1721         int code;
1722         int status;
1723
1724         LIST_FIELDS(struct ExecStatusInfo, exec);
1725 } ExecStatusInfo;
1726
1727 static void exec_status_info_free(ExecStatusInfo *i) {
1728         assert(i);
1729
1730         free(i->name);
1731         free(i->path);
1732         strv_free(i->argv);
1733         free(i);
1734 }
1735
1736 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1737         uint64_t start_timestamp, exit_timestamp;
1738         DBusMessageIter sub2, sub3;
1739         const char*path;
1740         unsigned n;
1741         uint32_t pid;
1742         int32_t code, status;
1743         dbus_bool_t ignore;
1744
1745         assert(i);
1746         assert(i);
1747
1748         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1749                 return -EIO;
1750
1751         dbus_message_iter_recurse(sub, &sub2);
1752
1753         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1754                 return -EIO;
1755
1756         if (!(i->path = strdup(path)))
1757                 return -ENOMEM;
1758
1759         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1760             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1761                 return -EIO;
1762
1763         n = 0;
1764         dbus_message_iter_recurse(&sub2, &sub3);
1765         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1766                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1767                 dbus_message_iter_next(&sub3);
1768                 n++;
1769         }
1770
1771
1772         if (!(i->argv = new0(char*, n+1)))
1773                 return -ENOMEM;
1774
1775         n = 0;
1776         dbus_message_iter_recurse(&sub2, &sub3);
1777         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1778                 const char *s;
1779
1780                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1781                 dbus_message_iter_get_basic(&sub3, &s);
1782                 dbus_message_iter_next(&sub3);
1783
1784                 if (!(i->argv[n++] = strdup(s)))
1785                         return -ENOMEM;
1786         }
1787
1788         if (!dbus_message_iter_next(&sub2) ||
1789             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1790             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1791             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1792             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1793             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1794             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1795                 return -EIO;
1796
1797         i->ignore = ignore;
1798         i->start_timestamp = (usec_t) start_timestamp;
1799         i->exit_timestamp = (usec_t) exit_timestamp;
1800         i->pid = (pid_t) pid;
1801         i->code = code;
1802         i->status = status;
1803
1804         return 0;
1805 }
1806
1807 typedef struct UnitStatusInfo {
1808         const char *id;
1809         const char *load_state;
1810         const char *active_state;
1811         const char *sub_state;
1812
1813         const char *description;
1814         const char *following;
1815
1816         const char *path;
1817         const char *default_control_group;
1818
1819         usec_t inactive_exit_timestamp;
1820         usec_t active_enter_timestamp;
1821         usec_t active_exit_timestamp;
1822         usec_t inactive_enter_timestamp;
1823
1824         bool need_daemon_reload;
1825
1826         /* Service */
1827         pid_t main_pid;
1828         pid_t control_pid;
1829         const char *status_text;
1830         bool running:1;
1831 #ifdef HAVE_SYSV_COMPAT
1832         bool is_sysv:1;
1833 #endif
1834
1835         usec_t start_timestamp;
1836         usec_t exit_timestamp;
1837
1838         int exit_code, exit_status;
1839
1840         usec_t condition_timestamp;
1841         bool condition_result;
1842
1843         /* Socket */
1844         unsigned n_accepted;
1845         unsigned n_connections;
1846         bool accept;
1847
1848         /* Device */
1849         const char *sysfs_path;
1850
1851         /* Mount, Automount */
1852         const char *where;
1853
1854         /* Swap */
1855         const char *what;
1856
1857         LIST_HEAD(ExecStatusInfo, exec);
1858 } UnitStatusInfo;
1859
1860 static void print_status_info(UnitStatusInfo *i) {
1861         ExecStatusInfo *p;
1862         const char *on, *off, *ss;
1863         usec_t timestamp;
1864         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
1865         char since2[FORMAT_TIMESTAMP_MAX], *s2;
1866
1867         assert(i);
1868
1869         /* This shows pretty information about a unit. See
1870          * print_property() for a low-level property printer */
1871
1872         printf("%s", strna(i->id));
1873
1874         if (i->description && !streq_ptr(i->id, i->description))
1875                 printf(" - %s", i->description);
1876
1877         printf("\n");
1878
1879         if (i->following)
1880                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
1881
1882         if (streq_ptr(i->load_state, "failed") ||
1883             streq_ptr(i->load_state, "banned")) {
1884                 on = ansi_highlight(true);
1885                 off = ansi_highlight(false);
1886         } else
1887                 on = off = "";
1888
1889         if (i->path)
1890                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
1891         else
1892                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
1893
1894         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1895
1896         if (streq_ptr(i->active_state, "failed")) {
1897                 on = ansi_highlight(true);
1898                 off = ansi_highlight(false);
1899         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1900                 on = ansi_highlight_green(true);
1901                 off = ansi_highlight_green(false);
1902         } else
1903                 on = off = "";
1904
1905         if (ss)
1906                 printf("\t  Active: %s%s (%s)%s",
1907                        on,
1908                        strna(i->active_state),
1909                        ss,
1910                        off);
1911         else
1912                 printf("\t  Active: %s%s%s",
1913                        on,
1914                        strna(i->active_state),
1915                        off);
1916
1917         timestamp = (streq_ptr(i->active_state, "active")      ||
1918                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
1919                     (streq_ptr(i->active_state, "inactive")    ||
1920                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
1921                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
1922                                                                   i->active_exit_timestamp;
1923
1924         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
1925         s2 = format_timestamp(since2, sizeof(since2), timestamp);
1926
1927         if (s1)
1928                 printf(" since %s; %s\n", s2, s1);
1929         else if (s2)
1930                 printf(" since %s\n", s2);
1931         else
1932                 printf("\n");
1933
1934         if (!i->condition_result && i->condition_timestamp > 0) {
1935                 s1 = format_timestamp_pretty(since1, sizeof(since1), i->condition_timestamp);
1936                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
1937
1938                 if (s1)
1939                         printf("\t          start condition failed at %s; %s\n", s2, s1);
1940                 else if (s2)
1941                         printf("\t          start condition failed at %s\n", s2);
1942         }
1943
1944         if (i->sysfs_path)
1945                 printf("\t  Device: %s\n", i->sysfs_path);
1946         if (i->where)
1947                 printf("\t   Where: %s\n", i->where);
1948         if (i->what)
1949                 printf("\t    What: %s\n", i->what);
1950
1951         if (i->accept)
1952                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1953
1954         LIST_FOREACH(exec, p, i->exec) {
1955                 char *t;
1956                 bool good;
1957
1958                 /* Only show exited processes here */
1959                 if (p->code == 0)
1960                         continue;
1961
1962                 t = strv_join(p->argv, " ");
1963                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
1964                 free(t);
1965
1966 #ifdef HAVE_SYSV_COMPAT
1967                 if (i->is_sysv)
1968                         good = is_clean_exit_lsb(p->code, p->status);
1969                 else
1970 #endif
1971                         good = is_clean_exit(p->code, p->status);
1972
1973                 if (!good) {
1974                         on = ansi_highlight(true);
1975                         off = ansi_highlight(false);
1976                 } else
1977                         on = off = "";
1978
1979                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
1980
1981                 if (p->code == CLD_EXITED) {
1982                         const char *c;
1983
1984                         printf("status=%i", p->status);
1985
1986 #ifdef HAVE_SYSV_COMPAT
1987                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1988 #else
1989                         if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD)))
1990 #endif
1991                                 printf("/%s", c);
1992
1993                 } else
1994                         printf("signal=%s", signal_to_string(p->status));
1995
1996                 printf(")%s\n", off);
1997
1998                 on = off = NULL;
1999
2000                 if (i->main_pid == p->pid &&
2001                     i->start_timestamp == p->start_timestamp &&
2002                     i->exit_timestamp == p->start_timestamp)
2003                         /* Let's not show this twice */
2004                         i->main_pid = 0;
2005
2006                 if (p->pid == i->control_pid)
2007                         i->control_pid = 0;
2008         }
2009
2010         if (i->main_pid > 0 || i->control_pid > 0) {
2011                 printf("\t");
2012
2013                 if (i->main_pid > 0) {
2014                         printf("Main PID: %u", (unsigned) i->main_pid);
2015
2016                         if (i->running) {
2017                                 char *t = NULL;
2018                                 get_process_name(i->main_pid, &t);
2019                                 if (t) {
2020                                         printf(" (%s)", t);
2021                                         free(t);
2022                                 }
2023                         } else if (i->exit_code > 0) {
2024                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2025
2026                                 if (i->exit_code == CLD_EXITED) {
2027                                         const char *c;
2028
2029                                         printf("status=%i", i->exit_status);
2030
2031 #ifdef HAVE_SYSV_COMPAT
2032                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2033 #else
2034                                         if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD)))
2035 #endif
2036                                                 printf("/%s", c);
2037
2038                                 } else
2039                                         printf("signal=%s", signal_to_string(i->exit_status));
2040                                 printf(")");
2041                         }
2042                 }
2043
2044                 if (i->main_pid > 0 && i->control_pid > 0)
2045                         printf(";");
2046
2047                 if (i->control_pid > 0) {
2048                         char *t = NULL;
2049
2050                         printf(" Control: %u", (unsigned) i->control_pid);
2051
2052                         get_process_name(i->control_pid, &t);
2053                         if (t) {
2054                                 printf(" (%s)", t);
2055                                 free(t);
2056                         }
2057                 }
2058
2059                 printf("\n");
2060         }
2061
2062         if (i->status_text)
2063                 printf("\t  Status: \"%s\"\n", i->status_text);
2064
2065         if (i->default_control_group) {
2066                 unsigned c;
2067
2068                 printf("\t  CGroup: %s\n", i->default_control_group);
2069
2070                 if (arg_transport != TRANSPORT_SSH) {
2071                         if ((c = columns()) > 18)
2072                                 c -= 18;
2073                         else
2074                                 c = 0;
2075
2076                         show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
2077                 }
2078         }
2079
2080         if (i->need_daemon_reload)
2081                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2082                        ansi_highlight(true),
2083                        ansi_highlight(false),
2084                        arg_user ? "--user" : "--system");
2085 }
2086
2087 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2088
2089         switch (dbus_message_iter_get_arg_type(iter)) {
2090
2091         case DBUS_TYPE_STRING: {
2092                 const char *s;
2093
2094                 dbus_message_iter_get_basic(iter, &s);
2095
2096                 if (s[0]) {
2097                         if (streq(name, "Id"))
2098                                 i->id = s;
2099                         else if (streq(name, "LoadState"))
2100                                 i->load_state = s;
2101                         else if (streq(name, "ActiveState"))
2102                                 i->active_state = s;
2103                         else if (streq(name, "SubState"))
2104                                 i->sub_state = s;
2105                         else if (streq(name, "Description"))
2106                                 i->description = s;
2107                         else if (streq(name, "FragmentPath"))
2108                                 i->path = s;
2109 #ifdef HAVE_SYSV_COMPAT
2110                         else if (streq(name, "SysVPath")) {
2111                                 i->is_sysv = true;
2112                                 i->path = s;
2113                         }
2114 #endif
2115                         else if (streq(name, "DefaultControlGroup"))
2116                                 i->default_control_group = s;
2117                         else if (streq(name, "StatusText"))
2118                                 i->status_text = s;
2119                         else if (streq(name, "SysFSPath"))
2120                                 i->sysfs_path = s;
2121                         else if (streq(name, "Where"))
2122                                 i->where = s;
2123                         else if (streq(name, "What"))
2124                                 i->what = s;
2125                         else if (streq(name, "Following"))
2126                                 i->following = s;
2127                 }
2128
2129                 break;
2130         }
2131
2132         case DBUS_TYPE_BOOLEAN: {
2133                 dbus_bool_t b;
2134
2135                 dbus_message_iter_get_basic(iter, &b);
2136
2137                 if (streq(name, "Accept"))
2138                         i->accept = b;
2139                 else if (streq(name, "NeedDaemonReload"))
2140                         i->need_daemon_reload = b;
2141                 else if (streq(name, "ConditionResult"))
2142                         i->condition_result = b;
2143
2144                 break;
2145         }
2146
2147         case DBUS_TYPE_UINT32: {
2148                 uint32_t u;
2149
2150                 dbus_message_iter_get_basic(iter, &u);
2151
2152                 if (streq(name, "MainPID")) {
2153                         if (u > 0) {
2154                                 i->main_pid = (pid_t) u;
2155                                 i->running = true;
2156                         }
2157                 } else if (streq(name, "ControlPID"))
2158                         i->control_pid = (pid_t) u;
2159                 else if (streq(name, "ExecMainPID")) {
2160                         if (u > 0)
2161                                 i->main_pid = (pid_t) u;
2162                 } else if (streq(name, "NAccepted"))
2163                         i->n_accepted = u;
2164                 else if (streq(name, "NConnections"))
2165                         i->n_connections = u;
2166
2167                 break;
2168         }
2169
2170         case DBUS_TYPE_INT32: {
2171                 int32_t j;
2172
2173                 dbus_message_iter_get_basic(iter, &j);
2174
2175                 if (streq(name, "ExecMainCode"))
2176                         i->exit_code = (int) j;
2177                 else if (streq(name, "ExecMainStatus"))
2178                         i->exit_status = (int) j;
2179
2180                 break;
2181         }
2182
2183         case DBUS_TYPE_UINT64: {
2184                 uint64_t u;
2185
2186                 dbus_message_iter_get_basic(iter, &u);
2187
2188                 if (streq(name, "ExecMainStartTimestamp"))
2189                         i->start_timestamp = (usec_t) u;
2190                 else if (streq(name, "ExecMainExitTimestamp"))
2191                         i->exit_timestamp = (usec_t) u;
2192                 else if (streq(name, "ActiveEnterTimestamp"))
2193                         i->active_enter_timestamp = (usec_t) u;
2194                 else if (streq(name, "InactiveEnterTimestamp"))
2195                         i->inactive_enter_timestamp = (usec_t) u;
2196                 else if (streq(name, "InactiveExitTimestamp"))
2197                         i->inactive_exit_timestamp = (usec_t) u;
2198                 else if (streq(name, "ActiveExitTimestamp"))
2199                         i->active_exit_timestamp = (usec_t) u;
2200                 else if (streq(name, "ConditionTimestamp"))
2201                         i->condition_timestamp = (usec_t) u;
2202
2203                 break;
2204         }
2205
2206         case DBUS_TYPE_ARRAY: {
2207
2208                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2209                     startswith(name, "Exec")) {
2210                         DBusMessageIter sub;
2211
2212                         dbus_message_iter_recurse(iter, &sub);
2213                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2214                                 ExecStatusInfo *info;
2215                                 int r;
2216
2217                                 if (!(info = new0(ExecStatusInfo, 1)))
2218                                         return -ENOMEM;
2219
2220                                 if (!(info->name = strdup(name))) {
2221                                         free(info);
2222                                         return -ENOMEM;
2223                                 }
2224
2225                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2226                                         free(info);
2227                                         return r;
2228                                 }
2229
2230                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2231
2232                                 dbus_message_iter_next(&sub);
2233                         }
2234                 }
2235
2236                 break;
2237         }
2238         }
2239
2240         return 0;
2241 }
2242
2243 static int print_property(const char *name, DBusMessageIter *iter) {
2244         assert(name);
2245         assert(iter);
2246
2247         /* This is a low-level property printer, see
2248          * print_status_info() for the nicer output */
2249
2250         if (arg_property && !strv_find(arg_property, name))
2251                 return 0;
2252
2253         switch (dbus_message_iter_get_arg_type(iter)) {
2254
2255         case DBUS_TYPE_STRING: {
2256                 const char *s;
2257                 dbus_message_iter_get_basic(iter, &s);
2258
2259                 if (arg_all || s[0])
2260                         printf("%s=%s\n", name, s);
2261
2262                 return 0;
2263         }
2264
2265         case DBUS_TYPE_BOOLEAN: {
2266                 dbus_bool_t b;
2267                 dbus_message_iter_get_basic(iter, &b);
2268                 printf("%s=%s\n", name, yes_no(b));
2269
2270                 return 0;
2271         }
2272
2273         case DBUS_TYPE_UINT64: {
2274                 uint64_t u;
2275                 dbus_message_iter_get_basic(iter, &u);
2276
2277                 /* Yes, heuristics! But we can change this check
2278                  * should it turn out to not be sufficient */
2279
2280                 if (strstr(name, "Timestamp")) {
2281                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
2282
2283                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
2284                                 printf("%s=%s\n", name, strempty(t));
2285                 } else if (strstr(name, "USec")) {
2286                         char timespan[FORMAT_TIMESPAN_MAX];
2287
2288                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
2289                 } else
2290                         printf("%s=%llu\n", name, (unsigned long long) u);
2291
2292                 return 0;
2293         }
2294
2295         case DBUS_TYPE_UINT32: {
2296                 uint32_t u;
2297                 dbus_message_iter_get_basic(iter, &u);
2298
2299                 if (strstr(name, "UMask") || strstr(name, "Mode"))
2300                         printf("%s=%04o\n", name, u);
2301                 else
2302                         printf("%s=%u\n", name, (unsigned) u);
2303
2304                 return 0;
2305         }
2306
2307         case DBUS_TYPE_INT32: {
2308                 int32_t i;
2309                 dbus_message_iter_get_basic(iter, &i);
2310
2311                 printf("%s=%i\n", name, (int) i);
2312                 return 0;
2313         }
2314
2315         case DBUS_TYPE_DOUBLE: {
2316                 double d;
2317                 dbus_message_iter_get_basic(iter, &d);
2318
2319                 printf("%s=%g\n", name, d);
2320                 return 0;
2321         }
2322
2323         case DBUS_TYPE_STRUCT: {
2324                 DBusMessageIter sub;
2325                 dbus_message_iter_recurse(iter, &sub);
2326
2327                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2328                         uint32_t u;
2329
2330                         dbus_message_iter_get_basic(&sub, &u);
2331
2332                         if (u)
2333                                 printf("%s=%u\n", name, (unsigned) u);
2334                         else if (arg_all)
2335                                 printf("%s=\n", name);
2336
2337                         return 0;
2338                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2339                         const char *s;
2340
2341                         dbus_message_iter_get_basic(&sub, &s);
2342
2343                         if (arg_all || s[0])
2344                                 printf("%s=%s\n", name, s);
2345
2346                         return 0;
2347                 }
2348
2349                 break;
2350         }
2351
2352         case DBUS_TYPE_ARRAY:
2353
2354                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
2355                         DBusMessageIter sub;
2356                         bool space = false;
2357
2358                         dbus_message_iter_recurse(iter, &sub);
2359                         if (arg_all ||
2360                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2361                                 printf("%s=", name);
2362
2363                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2364                                         const char *s;
2365
2366                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
2367                                         dbus_message_iter_get_basic(&sub, &s);
2368                                         printf("%s%s", space ? " " : "", s);
2369
2370                                         space = true;
2371                                         dbus_message_iter_next(&sub);
2372                                 }
2373
2374                                 puts("");
2375                         }
2376
2377                         return 0;
2378
2379                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
2380                         DBusMessageIter sub;
2381
2382                         dbus_message_iter_recurse(iter, &sub);
2383                         if (arg_all ||
2384                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2385                                 printf("%s=", name);
2386
2387                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2388                                         uint8_t u;
2389
2390                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
2391                                         dbus_message_iter_get_basic(&sub, &u);
2392                                         printf("%02x", u);
2393
2394                                         dbus_message_iter_next(&sub);
2395                                 }
2396
2397                                 puts("");
2398                         }
2399
2400                         return 0;
2401
2402                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2403                         DBusMessageIter sub, sub2;
2404
2405                         dbus_message_iter_recurse(iter, &sub);
2406                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2407                                 const char *path;
2408                                 dbus_bool_t ignore;
2409
2410                                 dbus_message_iter_recurse(&sub, &sub2);
2411
2412                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2413                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2414                                         printf("EnvironmentFile=%s (ignore=%s)\n", path, yes_no(ignore));
2415
2416                                 dbus_message_iter_next(&sub);
2417                         }
2418
2419                         return 0;
2420
2421                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2422                         DBusMessageIter sub, sub2;
2423
2424                         dbus_message_iter_recurse(iter, &sub);
2425                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2426                                 const char *type, *path;
2427
2428                                 dbus_message_iter_recurse(&sub, &sub2);
2429
2430                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2431                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2432                                         printf("%s=%s\n", type, path);
2433
2434                                 dbus_message_iter_next(&sub);
2435                         }
2436
2437                         return 0;
2438
2439                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2440                         DBusMessageIter sub, sub2;
2441
2442                         dbus_message_iter_recurse(iter, &sub);
2443                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2444                                 const char *base;
2445                                 uint64_t value, next_elapse;
2446
2447                                 dbus_message_iter_recurse(&sub, &sub2);
2448
2449                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2450                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2451                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2452                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2453
2454                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2455                                                base,
2456                                                format_timespan(timespan1, sizeof(timespan1), value),
2457                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2458                                 }
2459
2460                                 dbus_message_iter_next(&sub);
2461                         }
2462
2463                         return 0;
2464
2465                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2466                         DBusMessageIter sub;
2467
2468                         dbus_message_iter_recurse(iter, &sub);
2469                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2470                                 ExecStatusInfo info;
2471
2472                                 zero(info);
2473                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2474                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2475                                         char *t;
2476
2477                                         t = strv_join(info.argv, " ");
2478
2479                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2480                                                name,
2481                                                strna(info.path),
2482                                                strna(t),
2483                                                yes_no(info.ignore),
2484                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2485                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2486                                                (unsigned) info. pid,
2487                                                sigchld_code_to_string(info.code),
2488                                                info.status,
2489                                                info.code == CLD_EXITED ? "" : "/",
2490                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2491
2492                                         free(t);
2493                                 }
2494
2495                                 free(info.path);
2496                                 strv_free(info.argv);
2497
2498                                 dbus_message_iter_next(&sub);
2499                         }
2500
2501                         return 0;
2502                 }
2503
2504                 break;
2505         }
2506
2507         if (arg_all)
2508                 printf("%s=[unprintable]\n", name);
2509
2510         return 0;
2511 }
2512
2513 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2514         DBusMessage *m = NULL, *reply = NULL;
2515         const char *interface = "";
2516         int r;
2517         DBusError error;
2518         DBusMessageIter iter, sub, sub2, sub3;
2519         UnitStatusInfo info;
2520         ExecStatusInfo *p;
2521
2522         assert(bus);
2523         assert(path);
2524         assert(new_line);
2525
2526         zero(info);
2527         dbus_error_init(&error);
2528
2529         if (!(m = dbus_message_new_method_call(
2530                               "org.freedesktop.systemd1",
2531                               path,
2532                               "org.freedesktop.DBus.Properties",
2533                               "GetAll"))) {
2534                 log_error("Could not allocate message.");
2535                 r = -ENOMEM;
2536                 goto finish;
2537         }
2538
2539         if (!dbus_message_append_args(m,
2540                                       DBUS_TYPE_STRING, &interface,
2541                                       DBUS_TYPE_INVALID)) {
2542                 log_error("Could not append arguments to message.");
2543                 r = -ENOMEM;
2544                 goto finish;
2545         }
2546
2547         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2548                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2549                 r = -EIO;
2550                 goto finish;
2551         }
2552
2553         if (!dbus_message_iter_init(reply, &iter) ||
2554             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2555             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2556                 log_error("Failed to parse reply.");
2557                 r = -EIO;
2558                 goto finish;
2559         }
2560
2561         dbus_message_iter_recurse(&iter, &sub);
2562
2563         if (*new_line)
2564                 printf("\n");
2565
2566         *new_line = true;
2567
2568         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2569                 const char *name;
2570
2571                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2572                         log_error("Failed to parse reply.");
2573                         r = -EIO;
2574                         goto finish;
2575                 }
2576
2577                 dbus_message_iter_recurse(&sub, &sub2);
2578
2579                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2580                         log_error("Failed to parse reply.");
2581                         r = -EIO;
2582                         goto finish;
2583                 }
2584
2585                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2586                         log_error("Failed to parse reply.");
2587                         r = -EIO;
2588                         goto finish;
2589                 }
2590
2591                 dbus_message_iter_recurse(&sub2, &sub3);
2592
2593                 if (show_properties)
2594                         r = print_property(name, &sub3);
2595                 else
2596                         r = status_property(name, &sub3, &info);
2597
2598                 if (r < 0) {
2599                         log_error("Failed to parse reply.");
2600                         r = -EIO;
2601                         goto finish;
2602                 }
2603
2604                 dbus_message_iter_next(&sub);
2605         }
2606
2607         r = 0;
2608
2609         if (!show_properties)
2610                 print_status_info(&info);
2611
2612         if (!streq_ptr(info.active_state, "active") &&
2613             !streq_ptr(info.active_state, "reloading") &&
2614             streq(verb, "status"))
2615                 /* According to LSB: "program not running" */
2616                 r = 3;
2617
2618         while ((p = info.exec)) {
2619                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2620                 exec_status_info_free(p);
2621         }
2622
2623 finish:
2624         if (m)
2625                 dbus_message_unref(m);
2626
2627         if (reply)
2628                 dbus_message_unref(reply);
2629
2630         dbus_error_free(&error);
2631
2632         return r;
2633 }
2634
2635 static int show(DBusConnection *bus, char **args, unsigned n) {
2636         DBusMessage *m = NULL, *reply = NULL;
2637         int r, ret = 0;
2638         DBusError error;
2639         unsigned i;
2640         bool show_properties, new_line = false;
2641
2642         assert(bus);
2643         assert(args);
2644
2645         dbus_error_init(&error);
2646
2647         show_properties = !streq(args[0], "status");
2648
2649         if (show_properties)
2650                 pager_open();
2651
2652         if (show_properties && n <= 1) {
2653                 /* If not argument is specified inspect the manager
2654                  * itself */
2655
2656                 ret = show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2657                 goto finish;
2658         }
2659
2660         for (i = 1; i < n; i++) {
2661                 const char *path = NULL;
2662                 uint32_t id;
2663
2664                 if (safe_atou32(args[i], &id) < 0) {
2665
2666                         /* Interpret as unit name */
2667
2668                         if (!(m = dbus_message_new_method_call(
2669                                               "org.freedesktop.systemd1",
2670                                               "/org/freedesktop/systemd1",
2671                                               "org.freedesktop.systemd1.Manager",
2672                                               "LoadUnit"))) {
2673                                 log_error("Could not allocate message.");
2674                                 ret = -ENOMEM;
2675                                 goto finish;
2676                         }
2677
2678                         if (!dbus_message_append_args(m,
2679                                                       DBUS_TYPE_STRING, &args[i],
2680                                                       DBUS_TYPE_INVALID)) {
2681                                 log_error("Could not append arguments to message.");
2682                                 ret = -ENOMEM;
2683                                 goto finish;
2684                         }
2685
2686                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2687
2688                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2689                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2690                                         ret = -EIO;
2691                                         goto finish;
2692                                 }
2693
2694                                 dbus_error_free(&error);
2695
2696                                 dbus_message_unref(m);
2697                                 if (!(m = dbus_message_new_method_call(
2698                                                       "org.freedesktop.systemd1",
2699                                                       "/org/freedesktop/systemd1",
2700                                                       "org.freedesktop.systemd1.Manager",
2701                                                       "GetUnit"))) {
2702                                         log_error("Could not allocate message.");
2703                                         ret = -ENOMEM;
2704                                         goto finish;
2705                                 }
2706
2707                                 if (!dbus_message_append_args(m,
2708                                                               DBUS_TYPE_STRING, &args[i],
2709                                                               DBUS_TYPE_INVALID)) {
2710                                         log_error("Could not append arguments to message.");
2711                                         ret = -ENOMEM;
2712                                         goto finish;
2713                                 }
2714
2715                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2716                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2717
2718                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2719                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2720                                         else
2721                                                 ret = -EIO;
2722                                         goto finish;
2723                                 }
2724                         }
2725
2726                 } else if (show_properties) {
2727
2728                         /* Interpret as job id */
2729
2730                         if (!(m = dbus_message_new_method_call(
2731                                               "org.freedesktop.systemd1",
2732                                               "/org/freedesktop/systemd1",
2733                                               "org.freedesktop.systemd1.Manager",
2734                                               "GetJob"))) {
2735                                 log_error("Could not allocate message.");
2736                                 ret = -ENOMEM;
2737                                 goto finish;
2738                         }
2739
2740                         if (!dbus_message_append_args(m,
2741                                                       DBUS_TYPE_UINT32, &id,
2742                                                       DBUS_TYPE_INVALID)) {
2743                                 log_error("Could not append arguments to message.");
2744                                 ret = -ENOMEM;
2745                                 goto finish;
2746                         }
2747
2748                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2749                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2750                                 ret = -EIO;
2751                                 goto finish;
2752                         }
2753                 } else {
2754
2755                         /* Interpret as PID */
2756
2757                         if (!(m = dbus_message_new_method_call(
2758                                               "org.freedesktop.systemd1",
2759                                               "/org/freedesktop/systemd1",
2760                                               "org.freedesktop.systemd1.Manager",
2761                                               "GetUnitByPID"))) {
2762                                 log_error("Could not allocate message.");
2763                                 ret = -ENOMEM;
2764                                 goto finish;
2765                         }
2766
2767                         if (!dbus_message_append_args(m,
2768                                                       DBUS_TYPE_UINT32, &id,
2769                                                       DBUS_TYPE_INVALID)) {
2770                                 log_error("Could not append arguments to message.");
2771                                 ret = -ENOMEM;
2772                                 goto finish;
2773                         }
2774
2775                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2776                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2777                                 ret = -EIO;
2778                                 goto finish;
2779                         }
2780                 }
2781
2782                 if (!dbus_message_get_args(reply, &error,
2783                                            DBUS_TYPE_OBJECT_PATH, &path,
2784                                            DBUS_TYPE_INVALID)) {
2785                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2786                         ret = -EIO;
2787                         goto finish;
2788                 }
2789
2790                 if ((r = show_one(args[0], bus, path, show_properties, &new_line)) != 0)
2791                         ret = r;
2792
2793                 dbus_message_unref(m);
2794                 dbus_message_unref(reply);
2795                 m = reply = NULL;
2796         }
2797
2798 finish:
2799         if (m)
2800                 dbus_message_unref(m);
2801
2802         if (reply)
2803                 dbus_message_unref(reply);
2804
2805         dbus_error_free(&error);
2806
2807         return ret;
2808 }
2809
2810 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2811         DBusError error;
2812         DBusMessage *m = NULL, *reply = NULL;
2813
2814         assert(connection);
2815         assert(message);
2816
2817         dbus_error_init(&error);
2818
2819         log_debug("Got D-Bus request: %s.%s() on %s",
2820                   dbus_message_get_interface(message),
2821                   dbus_message_get_member(message),
2822                   dbus_message_get_path(message));
2823
2824         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2825                 log_error("Warning! D-Bus connection terminated.");
2826                 dbus_connection_close(connection);
2827
2828         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2829                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2830                 const char *id, *path;
2831
2832                 if (!dbus_message_get_args(message, &error,
2833                                            DBUS_TYPE_STRING, &id,
2834                                            DBUS_TYPE_OBJECT_PATH, &path,
2835                                            DBUS_TYPE_INVALID))
2836                         log_error("Failed to parse message: %s", bus_error_message(&error));
2837                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2838                         printf("Unit %s added.\n", id);
2839                 else
2840                         printf("Unit %s removed.\n", id);
2841
2842         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
2843                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2844                 uint32_t id;
2845                 const char *path, *result;
2846
2847                 if (!dbus_message_get_args(message, &error,
2848                                            DBUS_TYPE_UINT32, &id,
2849                                            DBUS_TYPE_OBJECT_PATH, &path,
2850                                            DBUS_TYPE_STRING, &result,
2851                                            DBUS_TYPE_INVALID))
2852                         log_error("Failed to parse message: %s", bus_error_message(&error));
2853                 else if (streq(dbus_message_get_member(message), "JobNew"))
2854                         printf("Job %u added.\n", id);
2855                 else
2856                         printf("Job %u removed.\n", id);
2857
2858
2859         } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) {
2860
2861                 const char *path, *interface, *property = "Id";
2862                 DBusMessageIter iter, sub;
2863
2864                 path = dbus_message_get_path(message);
2865
2866                 if (!dbus_message_get_args(message, &error,
2867                                           DBUS_TYPE_STRING, &interface,
2868                                           DBUS_TYPE_INVALID)) {
2869                         log_error("Failed to parse message: %s", bus_error_message(&error));
2870                         goto finish;
2871                 }
2872
2873                 if (!streq(interface, "org.freedesktop.systemd1.Job") &&
2874                     !streq(interface, "org.freedesktop.systemd1.Unit"))
2875                         goto finish;
2876
2877                 if (!(m = dbus_message_new_method_call(
2878                               "org.freedesktop.systemd1",
2879                               path,
2880                               "org.freedesktop.DBus.Properties",
2881                               "Get"))) {
2882                         log_error("Could not allocate message.");
2883                         goto oom;
2884                 }
2885
2886                 if (!dbus_message_append_args(m,
2887                                               DBUS_TYPE_STRING, &interface,
2888                                               DBUS_TYPE_STRING, &property,
2889                                               DBUS_TYPE_INVALID)) {
2890                         log_error("Could not append arguments to message.");
2891                         goto finish;
2892                 }
2893
2894                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2895                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2896                         goto finish;
2897                 }
2898
2899                 if (!dbus_message_iter_init(reply, &iter) ||
2900                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2901                         log_error("Failed to parse reply.");
2902                         goto finish;
2903                 }
2904
2905                 dbus_message_iter_recurse(&iter, &sub);
2906
2907                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2908                         const char *id;
2909
2910                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2911                                 log_error("Failed to parse reply.");
2912                                 goto finish;
2913                         }
2914
2915                         dbus_message_iter_get_basic(&sub, &id);
2916                         printf("Unit %s changed.\n", id);
2917                 } else {
2918                         uint32_t id;
2919
2920                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2921                                 log_error("Failed to parse reply.");
2922                                 goto finish;
2923                         }
2924
2925                         dbus_message_iter_get_basic(&sub, &id);
2926                         printf("Job %u changed.\n", id);
2927                 }
2928         }
2929
2930 finish:
2931         if (m)
2932                 dbus_message_unref(m);
2933
2934         if (reply)
2935                 dbus_message_unref(reply);
2936
2937         dbus_error_free(&error);
2938         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2939
2940 oom:
2941         if (m)
2942                 dbus_message_unref(m);
2943
2944         if (reply)
2945                 dbus_message_unref(reply);
2946
2947         dbus_error_free(&error);
2948         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2949 }
2950
2951 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2952         DBusMessage *m = NULL, *reply = NULL;
2953         DBusError error;
2954         int r;
2955
2956         dbus_error_init(&error);
2957
2958         if (!private_bus) {
2959                 dbus_bus_add_match(bus,
2960                                    "type='signal',"
2961                                    "sender='org.freedesktop.systemd1',"
2962                                    "interface='org.freedesktop.systemd1.Manager',"
2963                                    "path='/org/freedesktop/systemd1'",
2964                                    &error);
2965
2966                 if (dbus_error_is_set(&error)) {
2967                         log_error("Failed to add match: %s", bus_error_message(&error));
2968                         r = -EIO;
2969                         goto finish;
2970                 }
2971
2972                 dbus_bus_add_match(bus,
2973                                    "type='signal',"
2974                                    "sender='org.freedesktop.systemd1',"
2975                                    "interface='org.freedesktop.DBus.Properties',"
2976                                    "member='PropertiesChanged'",
2977                                    &error);
2978
2979                 if (dbus_error_is_set(&error)) {
2980                         log_error("Failed to add match: %s", bus_error_message(&error));
2981                         r = -EIO;
2982                         goto finish;
2983                 }
2984         }
2985
2986         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
2987                 log_error("Failed to add filter.");
2988                 r = -ENOMEM;
2989                 goto finish;
2990         }
2991
2992         if (!(m = dbus_message_new_method_call(
2993                               "org.freedesktop.systemd1",
2994                               "/org/freedesktop/systemd1",
2995                               "org.freedesktop.systemd1.Manager",
2996                               "Subscribe"))) {
2997                 log_error("Could not allocate message.");
2998                 r = -ENOMEM;
2999                 goto finish;
3000         }
3001
3002         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3003                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3004                 r = -EIO;
3005                 goto finish;
3006         }
3007
3008         while (dbus_connection_read_write_dispatch(bus, -1))
3009                 ;
3010
3011         r = 0;
3012
3013 finish:
3014
3015         /* This is slightly dirty, since we don't undo the filter or the matches. */
3016
3017         if (m)
3018                 dbus_message_unref(m);
3019
3020         if (reply)
3021                 dbus_message_unref(reply);
3022
3023         dbus_error_free(&error);
3024
3025         return r;
3026 }
3027
3028 static int dump(DBusConnection *bus, char **args, unsigned n) {
3029         DBusMessage *m = NULL, *reply = NULL;
3030         DBusError error;
3031         int r;
3032         const char *text;
3033
3034         dbus_error_init(&error);
3035
3036         pager_open();
3037
3038         if (!(m = dbus_message_new_method_call(
3039                               "org.freedesktop.systemd1",
3040                               "/org/freedesktop/systemd1",
3041                               "org.freedesktop.systemd1.Manager",
3042                               "Dump"))) {
3043                 log_error("Could not allocate message.");
3044                 return -ENOMEM;
3045         }
3046
3047         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3048                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3049                 r = -EIO;
3050                 goto finish;
3051         }
3052
3053         if (!dbus_message_get_args(reply, &error,
3054                                    DBUS_TYPE_STRING, &text,
3055                                    DBUS_TYPE_INVALID)) {
3056                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3057                 r = -EIO;
3058                 goto finish;
3059         }
3060
3061         fputs(text, stdout);
3062
3063         r = 0;
3064
3065 finish:
3066         if (m)
3067                 dbus_message_unref(m);
3068
3069         if (reply)
3070                 dbus_message_unref(reply);
3071
3072         dbus_error_free(&error);
3073
3074         return r;
3075 }
3076
3077 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
3078         DBusMessage *m = NULL, *reply = NULL;
3079         DBusError error;
3080         int r;
3081         const char *name = "", *path, *id;
3082         dbus_bool_t cleanup = FALSE;
3083         DBusMessageIter iter, sub;
3084         const char
3085                 *interface = "org.freedesktop.systemd1.Unit",
3086                 *property = "Id";
3087
3088         dbus_error_init(&error);
3089
3090         if (!(m = dbus_message_new_method_call(
3091                               "org.freedesktop.systemd1",
3092                               "/org/freedesktop/systemd1",
3093                               "org.freedesktop.systemd1.Manager",
3094                               "CreateSnapshot"))) {
3095                 log_error("Could not allocate message.");
3096                 return -ENOMEM;
3097         }
3098
3099         if (n > 1)
3100                 name = args[1];
3101
3102         if (!dbus_message_append_args(m,
3103                                       DBUS_TYPE_STRING, &name,
3104                                       DBUS_TYPE_BOOLEAN, &cleanup,
3105                                       DBUS_TYPE_INVALID)) {
3106                 log_error("Could not append arguments to message.");
3107                 r = -ENOMEM;
3108                 goto finish;
3109         }
3110
3111         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3112                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3113                 r = -EIO;
3114                 goto finish;
3115         }
3116
3117         if (!dbus_message_get_args(reply, &error,
3118                                    DBUS_TYPE_OBJECT_PATH, &path,
3119                                    DBUS_TYPE_INVALID)) {
3120                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3121                 r = -EIO;
3122                 goto finish;
3123         }
3124
3125         dbus_message_unref(m);
3126         if (!(m = dbus_message_new_method_call(
3127                               "org.freedesktop.systemd1",
3128                               path,
3129                               "org.freedesktop.DBus.Properties",
3130                               "Get"))) {
3131                 log_error("Could not allocate message.");
3132                 return -ENOMEM;
3133         }
3134
3135         if (!dbus_message_append_args(m,
3136                                       DBUS_TYPE_STRING, &interface,
3137                                       DBUS_TYPE_STRING, &property,
3138                                       DBUS_TYPE_INVALID)) {
3139                 log_error("Could not append arguments to message.");
3140                 r = -ENOMEM;
3141                 goto finish;
3142         }
3143
3144         dbus_message_unref(reply);
3145         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3146                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3147                 r = -EIO;
3148                 goto finish;
3149         }
3150
3151         if (!dbus_message_iter_init(reply, &iter) ||
3152             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3153                 log_error("Failed to parse reply.");
3154                 r = -EIO;
3155                 goto finish;
3156         }
3157
3158         dbus_message_iter_recurse(&iter, &sub);
3159
3160         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
3161                 log_error("Failed to parse reply.");
3162                 r = -EIO;
3163                 goto finish;
3164         }
3165
3166         dbus_message_iter_get_basic(&sub, &id);
3167
3168         if (!arg_quiet)
3169                 puts(id);
3170         r = 0;
3171
3172 finish:
3173         if (m)
3174                 dbus_message_unref(m);
3175
3176         if (reply)
3177                 dbus_message_unref(reply);
3178
3179         dbus_error_free(&error);
3180
3181         return r;
3182 }
3183
3184 static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) {
3185         DBusMessage *m = NULL, *reply = NULL;
3186         int r;
3187         DBusError error;
3188         unsigned i;
3189
3190         assert(bus);
3191         assert(args);
3192
3193         dbus_error_init(&error);
3194
3195         for (i = 1; i < n; i++) {
3196                 const char *path = NULL;
3197
3198                 if (!(m = dbus_message_new_method_call(
3199                                       "org.freedesktop.systemd1",
3200                                       "/org/freedesktop/systemd1",
3201                                       "org.freedesktop.systemd1.Manager",
3202                                       "GetUnit"))) {
3203                         log_error("Could not allocate message.");
3204                         r = -ENOMEM;
3205                         goto finish;
3206                 }
3207
3208                 if (!dbus_message_append_args(m,
3209                                               DBUS_TYPE_STRING, &args[i],
3210                                               DBUS_TYPE_INVALID)) {
3211                         log_error("Could not append arguments to message.");
3212                         r = -ENOMEM;
3213                         goto finish;
3214                 }
3215
3216                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3217                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3218                         r = -EIO;
3219                         goto finish;
3220                 }
3221
3222                 if (!dbus_message_get_args(reply, &error,
3223                                            DBUS_TYPE_OBJECT_PATH, &path,
3224                                            DBUS_TYPE_INVALID)) {
3225                         log_error("Failed to parse reply: %s", bus_error_message(&error));
3226                         r = -EIO;
3227                         goto finish;
3228                 }
3229
3230                 dbus_message_unref(m);
3231                 if (!(m = dbus_message_new_method_call(
3232                                       "org.freedesktop.systemd1",
3233                                       path,
3234                                       "org.freedesktop.systemd1.Snapshot",
3235                                       "Remove"))) {
3236                         log_error("Could not allocate message.");
3237                         r = -ENOMEM;
3238                         goto finish;
3239                 }
3240
3241                 dbus_message_unref(reply);
3242                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3243                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3244                         r = -EIO;
3245                         goto finish;
3246                 }
3247
3248                 dbus_message_unref(m);
3249                 dbus_message_unref(reply);
3250                 m = reply = NULL;
3251         }
3252
3253         r = 0;
3254
3255 finish:
3256         if (m)
3257                 dbus_message_unref(m);
3258
3259         if (reply)
3260                 dbus_message_unref(reply);
3261
3262         dbus_error_free(&error);
3263
3264         return r;
3265 }
3266
3267 static int daemon_reload(DBusConnection *bus, char **args, unsigned n) {
3268         DBusMessage *m = NULL, *reply = NULL;
3269         DBusError error;
3270         int r;
3271         const char *method;
3272
3273         dbus_error_init(&error);
3274
3275         if (arg_action == ACTION_RELOAD)
3276                 method = "Reload";
3277         else if (arg_action == ACTION_REEXEC)
3278                 method = "Reexecute";
3279         else {
3280                 assert(arg_action == ACTION_SYSTEMCTL);
3281
3282                 method =
3283                         streq(args[0], "clear-jobs")    ||
3284                         streq(args[0], "cancel")        ? "ClearJobs" :
3285                         streq(args[0], "daemon-reexec") ? "Reexecute" :
3286                         streq(args[0], "reset-failed")  ? "ResetFailed" :
3287                         streq(args[0], "halt")          ? "Halt" :
3288                         streq(args[0], "poweroff")      ? "PowerOff" :
3289                         streq(args[0], "reboot")        ? "Reboot" :
3290                         streq(args[0], "kexec")         ? "KExec" :
3291                         streq(args[0], "exit")          ? "Exit" :
3292                                     /* "daemon-reload" */ "Reload";
3293         }
3294
3295         if (!(m = dbus_message_new_method_call(
3296                               "org.freedesktop.systemd1",
3297                               "/org/freedesktop/systemd1",
3298                               "org.freedesktop.systemd1.Manager",
3299                               method))) {
3300                 log_error("Could not allocate message.");
3301                 return -ENOMEM;
3302         }
3303
3304         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3305
3306                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
3307                         /* There's always a fallback possible for
3308                          * legacy actions. */
3309                         r = -EADDRNOTAVAIL;
3310                         goto finish;
3311                 }
3312
3313                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3314                 r = -EIO;
3315                 goto finish;
3316         }
3317
3318         r = 0;
3319
3320 finish:
3321         if (m)
3322                 dbus_message_unref(m);
3323
3324         if (reply)
3325                 dbus_message_unref(reply);
3326
3327         dbus_error_free(&error);
3328
3329         return r;
3330 }
3331
3332 static int reset_failed(DBusConnection *bus, char **args, unsigned n) {
3333         DBusMessage *m = NULL, *reply = NULL;
3334         unsigned i;
3335         int r;
3336         DBusError error;
3337
3338         assert(bus);
3339         dbus_error_init(&error);
3340
3341         if (n <= 1)
3342                 return daemon_reload(bus, args, n);
3343
3344         for (i = 1; i < n; i++) {
3345
3346                 if (!(m = dbus_message_new_method_call(
3347                                       "org.freedesktop.systemd1",
3348                                       "/org/freedesktop/systemd1",
3349                                       "org.freedesktop.systemd1.Manager",
3350                                       "ResetFailedUnit"))) {
3351                         log_error("Could not allocate message.");
3352                         r = -ENOMEM;
3353                         goto finish;
3354                 }
3355
3356                 if (!dbus_message_append_args(m,
3357                                               DBUS_TYPE_STRING, args + i,
3358                                               DBUS_TYPE_INVALID)) {
3359                         log_error("Could not append arguments to message.");
3360                         r = -ENOMEM;
3361                         goto finish;
3362                 }
3363
3364                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3365                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3366                         r = -EIO;
3367                         goto finish;
3368                 }
3369
3370                 dbus_message_unref(m);
3371                 dbus_message_unref(reply);
3372                 m = reply = NULL;
3373         }
3374
3375         r = 0;
3376
3377 finish:
3378         if (m)
3379                 dbus_message_unref(m);
3380
3381         if (reply)
3382                 dbus_message_unref(reply);
3383
3384         dbus_error_free(&error);
3385
3386         return r;
3387 }
3388
3389 static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
3390         DBusMessage *m = NULL, *reply = NULL;
3391         DBusError error;
3392         DBusMessageIter iter, sub, sub2;
3393         int r;
3394         const char
3395                 *interface = "org.freedesktop.systemd1.Manager",
3396                 *property = "Environment";
3397
3398         dbus_error_init(&error);
3399
3400         pager_open();
3401
3402         if (!(m = dbus_message_new_method_call(
3403                               "org.freedesktop.systemd1",
3404                               "/org/freedesktop/systemd1",
3405                               "org.freedesktop.DBus.Properties",
3406                               "Get"))) {
3407                 log_error("Could not allocate message.");
3408                 return -ENOMEM;
3409         }
3410
3411         if (!dbus_message_append_args(m,
3412                                       DBUS_TYPE_STRING, &interface,
3413                                       DBUS_TYPE_STRING, &property,
3414                                       DBUS_TYPE_INVALID)) {
3415                 log_error("Could not append arguments to message.");
3416                 r = -ENOMEM;
3417                 goto finish;
3418         }
3419
3420         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3421                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3422                 r = -EIO;
3423                 goto finish;
3424         }
3425
3426         if (!dbus_message_iter_init(reply, &iter) ||
3427             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3428                 log_error("Failed to parse reply.");
3429                 r = -EIO;
3430                 goto finish;
3431         }
3432
3433         dbus_message_iter_recurse(&iter, &sub);
3434
3435         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3436             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3437                 log_error("Failed to parse reply.");
3438                 r = -EIO;
3439                 goto finish;
3440         }
3441
3442         dbus_message_iter_recurse(&sub, &sub2);
3443
3444         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3445                 const char *text;
3446
3447                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3448                         log_error("Failed to parse reply.");
3449                         r = -EIO;
3450                         goto finish;
3451                 }
3452
3453                 dbus_message_iter_get_basic(&sub2, &text);
3454                 printf("%s\n", text);
3455
3456                 dbus_message_iter_next(&sub2);
3457         }
3458
3459         r = 0;
3460
3461 finish:
3462         if (m)
3463                 dbus_message_unref(m);
3464
3465         if (reply)
3466                 dbus_message_unref(reply);
3467
3468         dbus_error_free(&error);
3469
3470         return r;
3471 }
3472
3473 static int set_environment(DBusConnection *bus, char **args, unsigned n) {
3474         DBusMessage *m = NULL, *reply = NULL;
3475         DBusError error;
3476         int r;
3477         const char *method;
3478         DBusMessageIter iter, sub;
3479         unsigned i;
3480
3481         dbus_error_init(&error);
3482
3483         method = streq(args[0], "set-environment")
3484                 ? "SetEnvironment"
3485                 : "UnsetEnvironment";
3486
3487         if (!(m = dbus_message_new_method_call(
3488                               "org.freedesktop.systemd1",
3489                               "/org/freedesktop/systemd1",
3490                               "org.freedesktop.systemd1.Manager",
3491                               method))) {
3492
3493                 log_error("Could not allocate message.");
3494                 return -ENOMEM;
3495         }
3496
3497         dbus_message_iter_init_append(m, &iter);
3498
3499         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
3500                 log_error("Could not append arguments to message.");
3501                 r = -ENOMEM;
3502                 goto finish;
3503         }
3504
3505         for (i = 1; i < n; i++)
3506                 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) {
3507                         log_error("Could not append arguments to message.");
3508                         r = -ENOMEM;
3509                         goto finish;
3510                 }
3511
3512         if (!dbus_message_iter_close_container(&iter, &sub)) {
3513                 log_error("Could not append arguments to message.");
3514                 r = -ENOMEM;
3515                 goto finish;
3516         }
3517
3518         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3519                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3520                 r = -EIO;
3521                 goto finish;
3522         }
3523
3524         r = 0;
3525
3526 finish:
3527         if (m)
3528                 dbus_message_unref(m);
3529
3530         if (reply)
3531                 dbus_message_unref(reply);
3532
3533         dbus_error_free(&error);
3534
3535         return r;
3536 }
3537
3538 typedef struct {
3539         char *name;
3540         char *path;
3541
3542         char **aliases;
3543         char **wanted_by;
3544 } InstallInfo;
3545
3546 static Hashmap *will_install = NULL, *have_installed = NULL;
3547 static Set *remove_symlinks_to = NULL;
3548 static unsigned n_symlinks = 0;
3549
3550 static void install_info_free(InstallInfo *i) {
3551         assert(i);
3552
3553         free(i->name);
3554         free(i->path);
3555         strv_free(i->aliases);
3556         strv_free(i->wanted_by);
3557         free(i);
3558 }
3559
3560 static void install_info_hashmap_free(Hashmap *m) {
3561         InstallInfo *i;
3562
3563         while ((i = hashmap_steal_first(m)))
3564                 install_info_free(i);
3565
3566         hashmap_free(m);
3567 }
3568
3569 static int install_info_add(const char *name) {
3570         InstallInfo *i;
3571         int r;
3572
3573         assert(will_install);
3574
3575         if (!unit_name_is_valid_no_type(name, true)) {
3576                 log_warning("Unit name %s is not a valid unit name.", name);
3577                 return -EINVAL;
3578         }
3579
3580         if (hashmap_get(have_installed, name) ||
3581             hashmap_get(will_install, name))
3582                 return 0;
3583
3584         if (!(i = new0(InstallInfo, 1))) {
3585                 r = -ENOMEM;
3586                 goto fail;
3587         }
3588
3589         if (!(i->name = strdup(name))) {
3590                 r = -ENOMEM;
3591                 goto fail;
3592         }
3593
3594         if ((r = hashmap_put(will_install, i->name, i)) < 0)
3595                 goto fail;
3596
3597         return 0;
3598
3599 fail:
3600         if (i)
3601                 install_info_free(i);
3602
3603         return r;
3604 }
3605
3606 static int config_parse_also(
3607                 const char *filename,
3608                 unsigned line,
3609                 const char *section,
3610                 const char *lvalue,
3611                 const char *rvalue,
3612                 void *data,
3613                 void *userdata) {
3614
3615         char *w;
3616         size_t l;
3617         char *state;
3618
3619         assert(filename);
3620         assert(lvalue);
3621         assert(rvalue);
3622
3623         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
3624                 char *n;
3625                 int r;
3626
3627                 if (!(n = strndup(w, l)))
3628                         return -ENOMEM;
3629
3630                 if ((r = install_info_add(n)) < 0) {
3631                         log_warning("Cannot install unit %s: %s", n, strerror(-r));
3632                         free(n);
3633                         return r;
3634                 }
3635
3636                 free(n);
3637         }
3638
3639         return 0;
3640 }
3641
3642 static int mark_symlink_for_removal(const char *p) {
3643         char *n;
3644         int r;
3645
3646         assert(p);
3647         assert(path_is_absolute(p));
3648
3649         if (!remove_symlinks_to)
3650                 return 0;
3651
3652         if (!(n = strdup(p)))
3653                 return -ENOMEM;
3654
3655         path_kill_slashes(n);
3656
3657         if ((r = set_put(remove_symlinks_to, n)) < 0) {
3658                 free(n);