src/systemctl.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/reboot.h>
  23 #include <stdio.h>
  24 #include <getopt.h>
  25 #include <stdbool.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <sys/ioctl.h>
  29 #include <termios.h>
  30 #include <unistd.h>
  31 #include <fcntl.h>
  32 #include <sys/socket.h>
  33 #include <sys/stat.h>
  34 #include <stddef.h>
  35 #include <sys/prctl.h>
  36
  37 #include <dbus/dbus.h>
  38
  39 #include "log.h"
  40 #include "util.h"
  41 #include "macro.h"
  42 #include "set.h"
  43 #include "utmp-wtmp.h"
  44 #include "special.h"
  45 #include "initreq.h"
  46 #include "strv.h"
  47 #include "dbus-common.h"
  48 #include "cgroup-show.h"
  49 #include "cgroup-util.h"
  50 #include "list.h"
  51 #include "path-lookup.h"
  52 #include "conf-parser.h"
  53 #include "sd-daemon.h"
  54 #include "shutdownd.h"
  55 #include "exit-status.h"
  56 #include "bus-errors.h"
  57 #include "build.h"
  58 #include "unit-name.h"
  59
  60 static const char *arg_type = NULL;
  61 static char **arg_property = NULL;
  62 static bool arg_all = false;
  63 static const char *arg_job_mode = "replace";
  64 static bool arg_user = false;
  65 static bool arg_global = false;
  66 static bool arg_immediate = false;
  67 static bool arg_no_block = false;
  68 static bool arg_no_pager = false;
  69 static bool arg_no_wtmp = false;
  70 static bool arg_no_sync = false;
  71 static bool arg_no_wall = false;
  72 static bool arg_no_reload = false;
  73 static bool arg_dry = false;
  74 static bool arg_quiet = false;
  75 static bool arg_full = false;
  76 static bool arg_force = false;
  77 static bool arg_defaults = false;
  78 static bool arg_ask_password = false;
  79 static bool arg_failed = false;
  80 static char **arg_wall = NULL;
  81 static const char *arg_kill_who = NULL;
  82 static const char *arg_kill_mode = NULL;
  83 static int arg_signal = SIGTERM;
  84 static usec_t arg_when = 0;
  85 static enum action {
  86         ACTION_INVALID,
  87         ACTION_SYSTEMCTL,
  88         ACTION_HALT,
  89         ACTION_POWEROFF,
  90         ACTION_REBOOT,
  91         ACTION_KEXEC,
  92         ACTION_EXIT,
  93         ACTION_RUNLEVEL2,
  94         ACTION_RUNLEVEL3,
  95         ACTION_RUNLEVEL4,
  96         ACTION_RUNLEVEL5,
  97         ACTION_RESCUE,
  98         ACTION_EMERGENCY,
  99         ACTION_DEFAULT,
 100         ACTION_RELOAD,
 101         ACTION_REEXEC,
 102         ACTION_RUNLEVEL,
 103         ACTION_CANCEL_SHUTDOWN,
 104         _ACTION_MAX
 105 } arg_action = ACTION_SYSTEMCTL;
 106 static enum dot {
 107         DOT_ALL,
 108         DOT_ORDER,
 109         DOT_REQUIRE
 110 } arg_dot = DOT_ALL;
 111 static enum transport {
 112         TRANSPORT_NORMAL,
 113         TRANSPORT_SSH,
 114         TRANSPORT_POLKIT
 115 } arg_transport = TRANSPORT_NORMAL;
 116 static const char *arg_host = NULL;
 117
 118 static bool private_bus = false;
 119
 120 static pid_t pager_pid = 0;
 121 static pid_t agent_pid = 0;
 122
 123 static int daemon_reload(DBusConnection *bus, char **args, unsigned n);
 124 static void pager_open(void);
 125
 126 static bool on_tty(void) {
 127         static int t = -1;
 128
 129         /* Note that this is invoked relatively early, before we start
 130          * the pager. That means the value we return reflects whether
 131          * we originally were started on a tty, not if we currently
 132          * are. But this is intended, since we want colour and so on
 133          * when run in our own pager. */
 134
 135         if (_unlikely_(t < 0))
 136                 t = isatty(STDOUT_FILENO) > 0;
 137
 138         return t;
 139 }
 140
 141 static void spawn_ask_password_agent(void) {
 142         pid_t parent;
 143
 144         if (agent_pid > 0)
 145                 return;
 146
 147         /* We check STDIN here, not STDOUT, since this is about input,
 148          * not output */
 149         if (!isatty(STDIN_FILENO))
 150                 return;
 151
 152         if (!arg_ask_password)
 153                 return;
 154
 155         if (arg_user)
 156                 return;
 157
 158         parent = getpid();
 159
 160         /* Spawns a temporary TTY agent, making sure it goes away when
 161          * we go away */
 162
 163         if ((agent_pid = fork()) < 0)
 164                 return;
 165
 166         if (agent_pid == 0) {
 167                 /* In the child */
 168
 169                 int fd;
 170                 bool stdout_is_tty, stderr_is_tty;
 171
 172                 /* Make sure the agent goes away when the parent dies */
 173                 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
 174                         _exit(EXIT_FAILURE);
 175
 176                 /* Check whether our parent died before we were able
 177                  * to set the death signal */
 178                 if (getppid() != parent)
 179                         _exit(EXIT_SUCCESS);
 180
 181                 /* Don't leak fds to the agent */
 182                 close_all_fds(NULL, 0);
 183
 184                 stdout_is_tty = isatty(STDOUT_FILENO);
 185                 stderr_is_tty = isatty(STDERR_FILENO);
 186
 187                 if (!stdout_is_tty || !stderr_is_tty) {
 188                         /* Detach from stdout/stderr. and reopen
 189                          * /dev/tty for them. This is important to
 190                          * ensure that when systemctl is started via
 191                          * popen() or a similar call that expects to
 192                          * read EOF we actually do generate EOF and
 193                          * not delay this indefinitely by because we
 194                          * keep an unused copy of stdin around. */
 195                         if ((fd = open("/dev/tty", O_WRONLY)) < 0) {
 196                                 log_error("Failed to open /dev/tty: %m");
 197                                 _exit(EXIT_FAILURE);
 198                         }
 199
 200                         if (!stdout_is_tty)
 201                                 dup2(fd, STDOUT_FILENO);
 202
 203                         if (!stderr_is_tty)
 204                                 dup2(fd, STDERR_FILENO);
 205
 206                         if (fd > 2)
 207                                 close(fd);
 208                 }
 209
 210                 execl(SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL);
 211
 212                 log_error("Unable to execute agent: %m");
 213                 _exit(EXIT_FAILURE);
 214         }
 215 }
 216
 217 static const char *ansi_highlight(bool b) {
 218
 219         if (!on_tty())
 220                 return "";
 221
 222         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
 223 }
 224
 225 static const char *ansi_highlight_green(bool b) {
 226
 227         if (!on_tty())
 228                 return "";
 229
 230         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
 231 }
 232
 233 static bool error_is_no_service(const DBusError *error) {
 234         assert(error);
 235
 236         if (!dbus_error_is_set(error))
 237                 return false;
 238
 239         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
 240                 return true;
 241
 242         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
 243                 return true;
 244
 245         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
 246 }
 247
 248 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
 249         assert(error);
 250
 251         if (!dbus_error_is_set(error))
 252                 return r;
 253
 254         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
 255             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
 256             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
 257             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
 258                 return EXIT_NOPERMISSION;
 259
 260         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
 261                 return EXIT_NOTINSTALLED;
 262
 263         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
 264             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
 265                 return EXIT_NOTIMPLEMENTED;
 266
 267         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
 268                 return EXIT_NOTCONFIGURED;
 269
 270         if (r != 0)
 271                 return r;
 272
 273         return EXIT_FAILURE;
 274 }
 275
 276 static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
 277
 278         assert(iter);
 279         assert(data);
 280
 281         if (dbus_message_iter_get_arg_type(iter) != type)
 282                 return -EIO;
 283
 284         dbus_message_iter_get_basic(iter, data);
 285
 286         if (!dbus_message_iter_next(iter) != !next)
 287                 return -EIO;
 288
 289         return 0;
 290 }
 291
 292 static void warn_wall(enum action action) {
 293         static const char *table[_ACTION_MAX] = {
 294                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
 295                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
 296                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
 297                 [ACTION_KEXEC]     = "The system is going down for kexec reboot NOW!",
 298                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
 299                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
 300         };
 301
 302         if (arg_no_wall)
 303                 return;
 304
 305         if (arg_wall) {
 306                 char *p;
 307
 308                 if (!(p = strv_join(arg_wall, " "))) {
 309                         log_error("Failed to join strings.");
 310                         return;
 311                 }
 312
 313                 if (*p) {
 314                         utmp_wall(p, NULL);
 315                         free(p);
 316                         return;
 317                 }
 318
 319                 free(p);
 320         }
 321
 322         if (!table[action])
 323                 return;
 324
 325         utmp_wall(table[action], NULL);
 326 }
 327
 328 struct unit_info {
 329         const char *id;
 330         const char *description;
 331         const char *load_state;
 332         const char *active_state;
 333         const char *sub_state;
 334         const char *following;
 335         const char *unit_path;
 336         uint32_t job_id;
 337         const char *job_type;
 338         const char *job_path;
 339 };
 340
 341 static int compare_unit_info(const void *a, const void *b) {
 342         const char *d1, *d2;
 343         const struct unit_info *u = a, *v = b;
 344
 345         d1 = strrchr(u->id, '.');
 346         d2 = strrchr(v->id, '.');
 347
 348         if (d1 && d2) {
 349                 int r;
 350
 351                 if ((r = strcasecmp(d1, d2)) != 0)
 352                         return r;
 353         }
 354
 355         return strcasecmp(u->id, v->id);
 356 }
 357
 358 static bool output_show_unit(const struct unit_info *u) {
 359         const char *dot;
 360
 361         if (arg_failed)
 362                 return streq(u->active_state, "failed");
 363
 364         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
 365                               streq(dot+1, arg_type))) &&
 366                 (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0);
 367 }
 368
 369 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
 370         unsigned active_len, sub_len, job_len, n_shown = 0;
 371         const struct unit_info *u;
 372
 373         active_len = sizeof("ACTIVE")-1;
 374         sub_len = sizeof("SUB")-1;
 375         job_len = sizeof("JOB")-1;
 376
 377         for (u = unit_infos; u < unit_infos + c; u++) {
 378                 if (!output_show_unit(u))
 379                         continue;
 380
 381                 active_len = MAX(active_len, strlen(u->active_state));
 382                 sub_len = MAX(sub_len, strlen(u->sub_state));
 383                 if (u->job_id != 0)
 384                         job_len = MAX(job_len, strlen(u->job_type));
 385         }
 386
 387         if (on_tty()) {
 388                 printf("%-25s %-6s %-*s %-*s %-*s", "UNIT", "LOAD",
 389                        active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB");
 390                 if (columns() >= 80+12 || arg_full || !arg_no_pager)
 391                         printf(" %s\n", "DESCRIPTION");
 392                 else
 393                         printf("\n");
 394         }
 395
 396         for (u = unit_infos; u < unit_infos + c; u++) {
 397                 char *e;
 398                 int a = 0, b = 0;
 399                 const char *on_loaded, *off_loaded;
 400                 const char *on_active, *off_active;
 401
 402                 if (!output_show_unit(u))
 403                         continue;
 404
 405                 n_shown++;
 406
 407                 if (!streq(u->load_state, "loaded") &&
 408                     !streq(u->load_state, "banned")) {
 409                         on_loaded = ansi_highlight(true);
 410                         off_loaded = ansi_highlight(false);
 411                 } else
 412                         on_loaded = off_loaded = "";
 413
 414                 if (streq(u->active_state, "failed")) {
 415                         on_active = ansi_highlight(true);
 416                         off_active = ansi_highlight(false);
 417                 } else
 418                         on_active = off_active = "";
 419
 420                 e = arg_full ? NULL : ellipsize(u->id, 25, 33);
 421
 422                 printf("%-25s %s%-6s%s %s%-*s %-*s%s%n",
 423                        e ? e : u->id,
 424                        on_loaded, u->load_state, off_loaded,
 425                        on_active, active_len, u->active_state,
 426                        sub_len, u->sub_state, off_active,
 427                        &a);
 428
 429                 free(e);
 430
 431                 a -= strlen(on_loaded) + strlen(off_loaded);
 432                 a -= strlen(on_active) + strlen(off_active);
 433
 434                 if (u->job_id != 0)
 435                         printf(" %-*s", job_len, u->job_type);
 436                 else
 437                         b = 1 + job_len;
 438
 439                 if (a + b + 1 < columns()) {
 440                         if (u->job_id == 0)
 441                                 printf(" %-*s", job_len, "");
 442
 443                         if (arg_full || !arg_no_pager)
 444                                 printf(" %s", u->description);
 445                         else
 446                                 printf(" %.*s", columns() - a - b - 1, u->description);
 447                 }
 448
 449                 fputs("\n", stdout);
 450         }
 451
 452         if (on_tty()) {
 453                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
 454                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
 455                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
 456                        "JOB    = Pending job for the unit.\n");
 457
 458                 if (arg_all)
 459                         printf("\n%u units listed.\n", n_shown);
 460                 else
 461                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", n_shown);
 462         }
 463 }
 464
 465 static int list_units(DBusConnection *bus, char **args, unsigned n) {
 466         DBusMessage *m = NULL, *reply = NULL;
 467         DBusError error;
 468         int r;
 469         DBusMessageIter iter, sub, sub2;
 470         unsigned c = 0, n_units = 0;
 471         struct unit_info *unit_infos = NULL;
 472
 473         dbus_error_init(&error);
 474
 475         assert(bus);
 476
 477         pager_open();
 478
 479         if (!(m = dbus_message_new_method_call(
 480                               "org.freedesktop.systemd1",
 481                               "/org/freedesktop/systemd1",
 482                               "org.freedesktop.systemd1.Manager",
 483                               "ListUnits"))) {
 484                 log_error("Could not allocate message.");
 485                 return -ENOMEM;
 486         }
 487
 488         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 489                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 490                 r = -EIO;
 491                 goto finish;
 492         }
 493
 494         if (!dbus_message_iter_init(reply, &iter) ||
 495             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 496             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 497                 log_error("Failed to parse reply.");
 498                 r = -EIO;
 499                 goto finish;
 500         }
 501
 502         dbus_message_iter_recurse(&iter, &sub);
 503
 504         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 505                 struct unit_info *u;
 506
 507                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 508                         log_error("Failed to parse reply.");
 509                         r = -EIO;
 510                         goto finish;
 511                 }
 512
 513                 if (c >= n_units) {
 514                         struct unit_info *w;
 515
 516                         n_units = MAX(2*c, 16);
 517                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
 518
 519                         if (!w) {
 520                                 log_error("Failed to allocate unit array.");
 521                                 r = -ENOMEM;
 522                                 goto finish;
 523                         }
 524
 525                         unit_infos = w;
 526                 }
 527
 528                 u = unit_infos+c;
 529
 530                 dbus_message_iter_recurse(&sub, &sub2);
 531
 532                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
 533                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
 534                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
 535                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
 536                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
 537                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
 538                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
 539                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
 540                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
 541                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
 542                         log_error("Failed to parse reply.");
 543                         r = -EIO;
 544                         goto finish;
 545                 }
 546
 547                 dbus_message_iter_next(&sub);
 548                 c++;
 549         }
 550
 551         if (c > 0) {
 552                 qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
 553                 output_units_list(unit_infos, c);
 554         }
 555
 556         r = 0;
 557
 558 finish:
 559         if (m)
 560                 dbus_message_unref(m);
 561
 562         if (reply)
 563                 dbus_message_unref(reply);
 564
 565         free(unit_infos);
 566
 567         dbus_error_free(&error);
 568
 569         return r;
 570 }
 571
 572 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
 573         static const char * const colors[] = {
 574                 "Requires",              "[color=\"black\"]",
 575                 "RequiresOverridable",   "[color=\"black\"]",
 576                 "Requisite",             "[color=\"darkblue\"]",
 577                 "RequisiteOverridable",  "[color=\"darkblue\"]",
 578                 "Wants",                 "[color=\"darkgrey\"]",
 579                 "Conflicts",             "[color=\"red\"]",
 580                 "ConflictedBy",          "[color=\"red\"]",
 581                 "After",                 "[color=\"green\"]"
 582         };
 583
 584         const char *c = NULL;
 585         unsigned i;
 586
 587         assert(name);
 588         assert(prop);
 589         assert(iter);
 590
 591         for (i = 0; i < ELEMENTSOF(colors); i += 2)
 592                 if (streq(colors[i], prop)) {
 593                         c = colors[i+1];
 594                         break;
 595                 }
 596
 597         if (!c)
 598                 return 0;
 599
 600         if (arg_dot != DOT_ALL)
 601                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
 602                         return 0;
 603
 604         switch (dbus_message_iter_get_arg_type(iter)) {
 605
 606         case DBUS_TYPE_ARRAY:
 607
 608                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
 609                         DBusMessageIter sub;
 610
 611                         dbus_message_iter_recurse(iter, &sub);
 612
 613                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 614                                 const char *s;
 615
 616                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
 617                                 dbus_message_iter_get_basic(&sub, &s);
 618                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
 619
 620                                 dbus_message_iter_next(&sub);
 621                         }
 622
 623                         return 0;
 624                 }
 625         }
 626
 627         return 0;
 628 }
 629
 630 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
 631         DBusMessage *m = NULL, *reply = NULL;
 632         const char *interface = "org.freedesktop.systemd1.Unit";
 633         int r;
 634         DBusError error;
 635         DBusMessageIter iter, sub, sub2, sub3;
 636
 637         assert(bus);
 638         assert(path);
 639
 640         dbus_error_init(&error);
 641
 642         if (!(m = dbus_message_new_method_call(
 643                               "org.freedesktop.systemd1",
 644                               path,
 645                               "org.freedesktop.DBus.Properties",
 646                               "GetAll"))) {
 647                 log_error("Could not allocate message.");
 648                 r = -ENOMEM;
 649                 goto finish;
 650         }
 651
 652         if (!dbus_message_append_args(m,
 653                                       DBUS_TYPE_STRING, &interface,
 654                                       DBUS_TYPE_INVALID)) {
 655                 log_error("Could not append arguments to message.");
 656                 r = -ENOMEM;
 657                 goto finish;
 658         }
 659
 660         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 661                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 662                 r = -EIO;
 663                 goto finish;
 664         }
 665
 666         if (!dbus_message_iter_init(reply, &iter) ||
 667             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 668             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
 669                 log_error("Failed to parse reply.");
 670                 r = -EIO;
 671                 goto finish;
 672         }
 673
 674         dbus_message_iter_recurse(&iter, &sub);
 675
 676         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 677                 const char *prop;
 678
 679                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
 680                         log_error("Failed to parse reply.");
 681                         r = -EIO;
 682                         goto finish;
 683                 }
 684
 685                 dbus_message_iter_recurse(&sub, &sub2);
 686
 687                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
 688                         log_error("Failed to parse reply.");
 689                         r = -EIO;
 690                         goto finish;
 691                 }
 692
 693                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
 694                         log_error("Failed to parse reply.");
 695                         r = -EIO;
 696                         goto finish;
 697                 }
 698
 699                 dbus_message_iter_recurse(&sub2, &sub3);
 700
 701                 if (dot_one_property(name, prop, &sub3)) {
 702                         log_error("Failed to parse reply.");
 703                         r = -EIO;
 704                         goto finish;
 705                 }
 706
 707                 dbus_message_iter_next(&sub);
 708         }
 709
 710         r = 0;
 711
 712 finish:
 713         if (m)
 714                 dbus_message_unref(m);
 715
 716         if (reply)
 717                 dbus_message_unref(reply);
 718
 719         dbus_error_free(&error);
 720
 721         return r;
 722 }
 723
 724 static int dot(DBusConnection *bus, char **args, unsigned n) {
 725         DBusMessage *m = NULL, *reply = NULL;
 726         DBusError error;
 727         int r;
 728         DBusMessageIter iter, sub, sub2;
 729
 730         dbus_error_init(&error);
 731
 732         assert(bus);
 733
 734         if (!(m = dbus_message_new_method_call(
 735                               "org.freedesktop.systemd1",
 736                               "/org/freedesktop/systemd1",
 737                               "org.freedesktop.systemd1.Manager",
 738                               "ListUnits"))) {
 739                 log_error("Could not allocate message.");
 740                 return -ENOMEM;
 741         }
 742
 743         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 744                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 745                 r = -EIO;
 746                 goto finish;
 747         }
 748
 749         if (!dbus_message_iter_init(reply, &iter) ||
 750             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 751             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 752                 log_error("Failed to parse reply.");
 753                 r = -EIO;
 754                 goto finish;
 755         }
 756
 757         printf("digraph systemd {\n");
 758
 759         dbus_message_iter_recurse(&iter, &sub);
 760         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 761                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
 762
 763                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 764                         log_error("Failed to parse reply.");
 765                         r = -EIO;
 766                         goto finish;
 767                 }
 768
 769                 dbus_message_iter_recurse(&sub, &sub2);
 770
 771                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
 772                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
 773                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
 774                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
 775                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
 776                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
 777                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
 778                         log_error("Failed to parse reply.");
 779                         r = -EIO;
 780                         goto finish;
 781                 }
 782
 783                 if ((r = dot_one(bus, id, unit_path)) < 0)
 784                         goto finish;
 785
 786                 /* printf("\t\"%s\";\n", id); */
 787                 dbus_message_iter_next(&sub);
 788         }
 789
 790         printf("}\n");
 791
 792         log_info("   Color legend: black     = Requires\n"
 793                  "                 dark blue = Requisite\n"
 794                  "                 dark grey = Wants\n"
 795                  "                 red       = Conflicts\n"
 796                  "                 green     = After\n");
 797
 798         if (isatty(fileno(stdout)))
 799                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
 800                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
 801
 802         r = 0;
 803
 804 finish:
 805         if (m)
 806                 dbus_message_unref(m);
 807
 808         if (reply)
 809                 dbus_message_unref(reply);
 810
 811         dbus_error_free(&error);
 812
 813         return r;
 814 }
 815
 816 static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
 817         DBusMessage *m = NULL, *reply = NULL;
 818         DBusError error;
 819         int r;
 820         DBusMessageIter iter, sub, sub2;
 821         unsigned k = 0;
 822
 823         dbus_error_init(&error);
 824
 825         assert(bus);
 826
 827         pager_open();
 828
 829         if (!(m = dbus_message_new_method_call(
 830                               "org.freedesktop.systemd1",
 831                               "/org/freedesktop/systemd1",
 832                               "org.freedesktop.systemd1.Manager",
 833                               "ListJobs"))) {
 834                 log_error("Could not allocate message.");
 835                 return -ENOMEM;
 836         }
 837
 838         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 839                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 840                 r = -EIO;
 841                 goto finish;
 842         }
 843
 844         if (!dbus_message_iter_init(reply, &iter) ||
 845             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 846             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 847                 log_error("Failed to parse reply.");
 848                 r = -EIO;
 849                 goto finish;
 850         }
 851
 852         dbus_message_iter_recurse(&iter, &sub);
 853
 854         if (isatty(STDOUT_FILENO))
 855                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
 856
 857         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 858                 const char *name, *type, *state, *job_path, *unit_path;
 859                 uint32_t id;
 860                 char *e;
 861
 862                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 863                         log_error("Failed to parse reply.");
 864                         r = -EIO;
 865                         goto finish;
 866                 }
 867
 868                 dbus_message_iter_recurse(&sub, &sub2);
 869
 870                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
 871                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
 872                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
 873                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
 874                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
 875                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
 876                         log_error("Failed to parse reply.");
 877                         r = -EIO;
 878                         goto finish;
 879                 }
 880
 881                 e = arg_full ? NULL : ellipsize(name, 25, 33);
 882                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
 883                 free(e);
 884
 885                 k++;
 886
 887                 dbus_message_iter_next(&sub);
 888         }
 889
 890         if (isatty(STDOUT_FILENO))
 891                 printf("\n%u jobs listed.\n", k);
 892
 893         r = 0;
 894
 895 finish:
 896         if (m)
 897                 dbus_message_unref(m);
 898
 899         if (reply)
 900                 dbus_message_unref(reply);
 901
 902         dbus_error_free(&error);
 903
 904         return r;
 905 }
 906
 907 static int load_unit(DBusConnection *bus, char **args, unsigned n) {
 908         DBusMessage *m = NULL, *reply = NULL;
 909         DBusError error;
 910         int r;
 911         unsigned i;
 912
 913         dbus_error_init(&error);
 914
 915         assert(bus);
 916         assert(args);
 917
 918         for (i = 1; i < n; i++) {
 919
 920                 if (!(m = dbus_message_new_method_call(
 921                                       "org.freedesktop.systemd1",
 922                                       "/org/freedesktop/systemd1",
 923                                       "org.freedesktop.systemd1.Manager",
 924                                       "LoadUnit"))) {
 925                         log_error("Could not allocate message.");
 926                         r = -ENOMEM;
 927                         goto finish;
 928                 }
 929
 930                 if (!dbus_message_append_args(m,
 931                                               DBUS_TYPE_STRING, &args[i],
 932                                               DBUS_TYPE_INVALID)) {
 933                         log_error("Could not append arguments to message.");
 934                         r = -ENOMEM;
 935                         goto finish;
 936                 }
 937
 938                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 939                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 940                         r = -EIO;
 941                         goto finish;
 942                 }
 943
 944                 dbus_message_unref(m);
 945                 dbus_message_unref(reply);
 946
 947                 m = reply = NULL;
 948         }
 949
 950         r = 0;
 951
 952 finish:
 953         if (m)
 954                 dbus_message_unref(m);
 955
 956         if (reply)
 957                 dbus_message_unref(reply);
 958
 959         dbus_error_free(&error);
 960
 961         return r;
 962 }
 963
 964 static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
 965         DBusMessage *m = NULL, *reply = NULL;
 966         DBusError error;
 967         int r;
 968         unsigned i;
 969
 970         dbus_error_init(&error);
 971
 972         assert(bus);
 973         assert(args);
 974
 975         if (n <= 1)
 976                 return daemon_reload(bus, args, n);
 977
 978         for (i = 1; i < n; i++) {
 979                 unsigned id;
 980                 const char *path;
 981
 982                 if (!(m = dbus_message_new_method_call(
 983                                       "org.freedesktop.systemd1",
 984                                       "/org/freedesktop/systemd1",
 985                                       "org.freedesktop.systemd1.Manager",
 986                                       "GetJob"))) {
 987                         log_error("Could not allocate message.");
 988                         r = -ENOMEM;
 989                         goto finish;
 990                 }
 991
 992                 if ((r = safe_atou(args[i], &id)) < 0) {
 993                         log_error("Failed to parse job id: %s", strerror(-r));
 994                         goto finish;
 995                 }
 996
 997                 assert_cc(sizeof(uint32_t) == sizeof(id));
 998                 if (!dbus_message_append_args(m,
 999                                               DBUS_TYPE_UINT32, &id,
1000                                               DBUS_TYPE_INVALID)) {
1001                         log_error("Could not append arguments to message.");
1002                         r = -ENOMEM;
1003                         goto finish;
1004                 }
1005
1006                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1007                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1008                         r = -EIO;
1009                         goto finish;
1010                 }
1011
1012                 if (!dbus_message_get_args(reply, &error,
1013                                            DBUS_TYPE_OBJECT_PATH, &path,
1014                                            DBUS_TYPE_INVALID)) {
1015                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1016                         r = -EIO;
1017                         goto finish;
1018                 }
1019
1020                 dbus_message_unref(m);
1021                 if (!(m = dbus_message_new_method_call(
1022                                       "org.freedesktop.systemd1",
1023                                       path,
1024                                       "org.freedesktop.systemd1.Job",
1025                                       "Cancel"))) {
1026                         log_error("Could not allocate message.");
1027                         r = -ENOMEM;
1028                         goto finish;
1029                 }
1030
1031                 dbus_message_unref(reply);
1032                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1033                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1034                         r = -EIO;
1035                         goto finish;
1036                 }
1037
1038                 dbus_message_unref(m);
1039                 dbus_message_unref(reply);
1040                 m = reply = NULL;
1041         }
1042
1043         r = 0;
1044
1045 finish:
1046         if (m)
1047                 dbus_message_unref(m);
1048
1049         if (reply)
1050                 dbus_message_unref(reply);
1051
1052         dbus_error_free(&error);
1053
1054         return r;
1055 }
1056
1057 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
1058         DBusMessage *m = NULL, *reply = NULL;
1059         dbus_bool_t b = FALSE;
1060         DBusMessageIter iter, sub;
1061         const char
1062                 *interface = "org.freedesktop.systemd1.Unit",
1063                 *property = "NeedDaemonReload",
1064                 *path;
1065
1066         /* We ignore all errors here, since this is used to show a warning only */
1067
1068         if (!(m = dbus_message_new_method_call(
1069                               "org.freedesktop.systemd1",
1070                               "/org/freedesktop/systemd1",
1071                               "org.freedesktop.systemd1.Manager",
1072                               "GetUnit")))
1073                 goto finish;
1074
1075         if (!dbus_message_append_args(m,
1076                                       DBUS_TYPE_STRING, &unit,
1077                                       DBUS_TYPE_INVALID))
1078                 goto finish;
1079
1080         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1081                 goto finish;
1082
1083         if (!dbus_message_get_args(reply, NULL,
1084                                    DBUS_TYPE_OBJECT_PATH, &path,
1085                                    DBUS_TYPE_INVALID))
1086                 goto finish;
1087
1088         dbus_message_unref(m);
1089         if (!(m = dbus_message_new_method_call(
1090                               "org.freedesktop.systemd1",
1091                               path,
1092                               "org.freedesktop.DBus.Properties",
1093                               "Get")))
1094                 goto finish;
1095
1096         if (!dbus_message_append_args(m,
1097                                       DBUS_TYPE_STRING, &interface,
1098                                       DBUS_TYPE_STRING, &property,
1099                                       DBUS_TYPE_INVALID)) {
1100                 goto finish;
1101         }
1102
1103         dbus_message_unref(reply);
1104         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1105                 goto finish;
1106
1107         if (!dbus_message_iter_init(reply, &iter) ||
1108             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1109                 goto finish;
1110
1111         dbus_message_iter_recurse(&iter, &sub);
1112
1113         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1114                 goto finish;
1115
1116         dbus_message_iter_get_basic(&sub, &b);
1117
1118 finish:
1119         if (m)
1120                 dbus_message_unref(m);
1121
1122         if (reply)
1123                 dbus_message_unref(reply);
1124
1125         return b;
1126 }
1127
1128 typedef struct WaitData {
1129         Set *set;
1130         char *result;
1131 } WaitData;
1132
1133 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1134         DBusError error;
1135         WaitData *d = data;
1136
1137         assert(connection);
1138         assert(message);
1139         assert(d);
1140
1141         dbus_error_init(&error);
1142
1143         log_debug("Got D-Bus request: %s.%s() on %s",
1144                   dbus_message_get_interface(message),
1145                   dbus_message_get_member(message),
1146                   dbus_message_get_path(message));
1147
1148         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1149                 log_error("Warning! D-Bus connection terminated.");
1150                 dbus_connection_close(connection);
1151
1152         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1153                 uint32_t id;
1154                 const char *path, *result;
1155                 dbus_bool_t success = true;
1156
1157                 if (dbus_message_get_args(message, &error,
1158                                           DBUS_TYPE_UINT32, &id,
1159                                           DBUS_TYPE_OBJECT_PATH, &path,
1160                                           DBUS_TYPE_STRING, &result,
1161                                           DBUS_TYPE_INVALID)) {
1162                         char *p;
1163
1164                         if ((p = set_remove(d->set, (char*) path)))
1165                                 free(p);
1166
1167                         if (*result)
1168                                 d->result = strdup(result);
1169
1170                         goto finish;
1171                 }
1172 #ifndef LEGACY
1173                 dbus_error_free(&error);
1174
1175                 if (dbus_message_get_args(message, &error,
1176                                           DBUS_TYPE_UINT32, &id,
1177                                           DBUS_TYPE_OBJECT_PATH, &path,
1178                                           DBUS_TYPE_BOOLEAN, &success,
1179                                           DBUS_TYPE_INVALID)) {
1180                         char *p;
1181
1182                         /* Compatibility with older systemd versions <
1183                          * 19 during upgrades. This should be dropped
1184                          * one day */
1185
1186                         if ((p = set_remove(d->set, (char*) path)))
1187                                 free(p);
1188
1189                         if (!success)
1190                                 d->result = strdup("failed");
1191
1192                         goto finish;
1193                 }
1194 #endif
1195
1196                 log_error("Failed to parse message: %s", bus_error_message(&error));
1197         }
1198
1199 finish:
1200         dbus_error_free(&error);
1201         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1202 }
1203
1204 static int enable_wait_for_jobs(DBusConnection *bus) {
1205         DBusError error;
1206
1207         assert(bus);
1208
1209         if (private_bus)
1210                 return 0;
1211
1212         dbus_error_init(&error);
1213         dbus_bus_add_match(bus,
1214                            "type='signal',"
1215                            "sender='org.freedesktop.systemd1',"
1216                            "interface='org.freedesktop.systemd1.Manager',"
1217                            "member='JobRemoved',"
1218                            "path='/org/freedesktop/systemd1'",
1219                            &error);
1220
1221         if (dbus_error_is_set(&error)) {
1222                 log_error("Failed to add match: %s", bus_error_message(&error));
1223                 dbus_error_free(&error);
1224                 return -EIO;
1225         }
1226
1227         /* This is slightly dirty, since we don't undo the match registrations. */
1228         return 0;
1229 }
1230
1231 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1232         int r;
1233         WaitData d;
1234
1235         assert(bus);
1236         assert(s);
1237
1238         zero(d);
1239         d.set = s;
1240
1241         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1242                 log_error("Failed to add filter.");
1243                 r = -ENOMEM;
1244                 goto finish;
1245         }
1246
1247         while (!set_isempty(s) &&
1248                dbus_connection_read_write_dispatch(bus, -1))
1249                 ;
1250
1251         if (!arg_quiet && d.result) {
1252                 if (streq(d.result, "timeout"))
1253                         log_error("Job timed out.");
1254                 else if (streq(d.result, "canceled"))
1255                         log_error("Job canceled.");
1256                 else if (streq(d.result, "dependency"))
1257                         log_error("A dependency job failed. See system logs for details.");
1258                 else if (!streq(d.result, "done") && !streq(d.result, "skipped"))
1259                         log_error("Job failed. See system logs and 'systemctl status' for details.");
1260         }
1261
1262         if (streq_ptr(d.result, "timeout"))
1263                 r = -ETIME;
1264         else if (streq_ptr(d.result, "canceled"))
1265                 r = -ECANCELED;
1266         else if (!streq_ptr(d.result, "done") && !streq_ptr(d.result, "skipped"))
1267                 r = -EIO;
1268         else
1269                 r = 0;
1270
1271         free(d.result);
1272
1273 finish:
1274         /* This is slightly dirty, since we don't undo the filter registration. */
1275
1276         return r;
1277 }
1278
1279 static int start_unit_one(
1280                 DBusConnection *bus,
1281                 const char *method,
1282                 const char *name,
1283                 const char *mode,
1284                 DBusError *error,
1285                 Set *s) {
1286
1287         DBusMessage *m = NULL, *reply = NULL;
1288         const char *path;
1289         int r;
1290
1291         assert(bus);
1292         assert(method);
1293         assert(name);
1294         assert(mode);
1295         assert(error);
1296         assert(arg_no_block || s);
1297
1298         if (!(m = dbus_message_new_method_call(
1299                               "org.freedesktop.systemd1",
1300                               "/org/freedesktop/systemd1",
1301                               "org.freedesktop.systemd1.Manager",
1302                               method))) {
1303                 log_error("Could not allocate message.");
1304                 r = -ENOMEM;
1305                 goto finish;
1306         }
1307
1308         if (!dbus_message_append_args(m,
1309                                       DBUS_TYPE_STRING, &name,
1310                                       DBUS_TYPE_STRING, &mode,
1311                                       DBUS_TYPE_INVALID)) {
1312                 log_error("Could not append arguments to message.");
1313                 r = -ENOMEM;
1314                 goto finish;
1315         }
1316
1317         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1318
1319                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1320                         /* There's always a fallback possible for
1321                          * legacy actions. */
1322                         r = -EADDRNOTAVAIL;
1323                         goto finish;
1324                 }
1325
1326                 log_error("Failed to issue method call: %s", bus_error_message(error));
1327                 r = -EIO;
1328                 goto finish;
1329         }
1330
1331         if (!dbus_message_get_args(reply, error,
1332                                    DBUS_TYPE_OBJECT_PATH, &path,
1333                                    DBUS_TYPE_INVALID)) {
1334                 log_error("Failed to parse reply: %s", bus_error_message(error));
1335                 r = -EIO;
1336                 goto finish;
1337         }
1338
1339         if (need_daemon_reload(bus, name))
1340                 log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1341                             arg_user ? "--user" : "--system");
1342
1343         if (!arg_no_block) {
1344                 char *p;
1345
1346                 if (!(p = strdup(path))) {
1347                         log_error("Failed to duplicate path.");
1348                         r = -ENOMEM;
1349                         goto finish;
1350                 }
1351
1352                 if ((r = set_put(s, p)) < 0) {
1353                         free(p);
1354                         log_error("Failed to add path to set.");
1355                         goto finish;
1356                 }
1357         }
1358
1359         r = 0;
1360
1361 finish:
1362         if (m)
1363                 dbus_message_unref(m);
1364
1365         if (reply)
1366                 dbus_message_unref(reply);
1367
1368         return r;
1369 }
1370
1371 static enum action verb_to_action(const char *verb) {
1372         if (streq(verb, "halt"))
1373                 return ACTION_HALT;
1374         else if (streq(verb, "poweroff"))
1375                 return ACTION_POWEROFF;
1376         else if (streq(verb, "reboot"))
1377                 return ACTION_REBOOT;
1378         else if (streq(verb, "kexec"))
1379                 return ACTION_KEXEC;
1380         else if (streq(verb, "rescue"))
1381                 return ACTION_RESCUE;
1382         else if (streq(verb, "emergency"))
1383                 return ACTION_EMERGENCY;
1384         else if (streq(verb, "default"))
1385                 return ACTION_DEFAULT;
1386         else if (streq(verb, "exit"))
1387                 return ACTION_EXIT;
1388         else
1389                 return ACTION_INVALID;
1390 }
1391
1392 static int start_unit(DBusConnection *bus, char **args, unsigned n) {
1393
1394         static const char * const table[_ACTION_MAX] = {
1395                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1396                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1397                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1398                 [ACTION_KEXEC] = SPECIAL_KEXEC_TARGET,
1399                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1400                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1401                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1402                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1403                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1404                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1405                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET,
1406                 [ACTION_EXIT] = SPECIAL_EXIT_TARGET
1407         };
1408
1409         int r, ret = 0;
1410         unsigned i;
1411         const char *method, *mode, *one_name;
1412         Set *s = NULL;
1413         DBusError error;
1414
1415         dbus_error_init(&error);
1416
1417         assert(bus);
1418
1419         spawn_ask_password_agent();
1420
1421         if (arg_action == ACTION_SYSTEMCTL) {
1422                 method =
1423                         streq(args[0], "stop") ||
1424                         streq(args[0], "condstop")              ? "StopUnit" :
1425                         streq(args[0], "reload")                ? "ReloadUnit" :
1426                         streq(args[0], "restart")               ? "RestartUnit" :
1427
1428                         streq(args[0], "try-restart")           ||
1429                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1430
1431                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1432
1433                         streq(args[0], "reload-or-try-restart") ||
1434                         streq(args[0], "condreload") ||
1435
1436                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1437                                                                   "StartUnit";
1438
1439                 mode =
1440                         (streq(args[0], "isolate") ||
1441                          streq(args[0], "rescue")  ||
1442                          streq(args[0], "emergency")) ? "isolate" : arg_job_mode;
1443
1444                 one_name = table[verb_to_action(args[0])];
1445
1446         } else {
1447                 assert(arg_action < ELEMENTSOF(table));
1448                 assert(table[arg_action]);
1449
1450                 method = "StartUnit";
1451
1452                 mode = (arg_action == ACTION_EMERGENCY ||
1453                         arg_action == ACTION_RESCUE ||
1454                         arg_action == ACTION_RUNLEVEL2 ||
1455                         arg_action == ACTION_RUNLEVEL3 ||
1456                         arg_action == ACTION_RUNLEVEL4 ||
1457                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1458
1459                 one_name = table[arg_action];
1460         }
1461
1462         if (!arg_no_block) {
1463                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1464                         log_error("Could not watch jobs: %s", strerror(-ret));
1465                         goto finish;
1466                 }
1467
1468                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1469                         log_error("Failed to allocate set.");
1470                         ret = -ENOMEM;
1471                         goto finish;
1472                 }
1473         }
1474
1475         if (one_name) {
1476                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1477                         goto finish;
1478         } else {
1479                 for (i = 1; i < n; i++)
1480                         if ((r = start_unit_one(bus, method, args[i], mode, &error, s)) != 0) {
1481                                 ret = translate_bus_error_to_exit_status(r, &error);
1482                                 dbus_error_free(&error);
1483                         }
1484         }
1485
1486         if (!arg_no_block)
1487                 if ((r = wait_for_jobs(bus, s)) < 0) {
1488                         ret = r;
1489                         goto finish;
1490                 }
1491
1492 finish:
1493         if (s)
1494                 set_free_free(s);
1495
1496         dbus_error_free(&error);
1497
1498         return ret;
1499 }
1500
1501 static int start_special(DBusConnection *bus, char **args, unsigned n) {
1502         int r;
1503
1504         assert(bus);
1505         assert(args);
1506
1507         if (arg_force &&
1508             (streq(args[0], "halt") ||
1509              streq(args[0], "poweroff") ||
1510              streq(args[0], "reboot") ||
1511              streq(args[0], "kexec") ||
1512              streq(args[0], "exit")))
1513                 return daemon_reload(bus, args, n);
1514
1515         r = start_unit(bus, args, n);
1516
1517         if (r >= 0)
1518                 warn_wall(verb_to_action(args[0]));
1519
1520         return r;
1521 }
1522
1523 static int check_unit(DBusConnection *bus, char **args, unsigned n) {
1524         DBusMessage *m = NULL, *reply = NULL;
1525         const char
1526                 *interface = "org.freedesktop.systemd1.Unit",
1527                 *property = "ActiveState";
1528         int r = 3; /* According to LSB: "program is not running" */
1529         DBusError error;
1530         unsigned i;
1531
1532         assert(bus);
1533         assert(args);
1534
1535         dbus_error_init(&error);
1536
1537         for (i = 1; i < n; i++) {
1538                 const char *path = NULL;
1539                 const char *state;
1540                 DBusMessageIter iter, sub;
1541
1542                 if (!(m = dbus_message_new_method_call(
1543                                       "org.freedesktop.systemd1",
1544                                       "/org/freedesktop/systemd1",
1545                                       "org.freedesktop.systemd1.Manager",
1546                                       "GetUnit"))) {
1547                         log_error("Could not allocate message.");
1548                         r = -ENOMEM;
1549                         goto finish;
1550                 }
1551
1552                 if (!dbus_message_append_args(m,
1553                                               DBUS_TYPE_STRING, &args[i],
1554                                               DBUS_TYPE_INVALID)) {
1555                         log_error("Could not append arguments to message.");
1556                         r = -ENOMEM;
1557                         goto finish;
1558                 }
1559
1560                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1561
1562                         /* Hmm, cannot figure out anything about this unit... */
1563                         if (!arg_quiet)
1564                                 puts("unknown");
1565
1566                         dbus_error_free(&error);
1567                         dbus_message_unref(m);
1568                         continue;
1569                 }
1570
1571                 if (!dbus_message_get_args(reply, &error,
1572                                            DBUS_TYPE_OBJECT_PATH, &path,
1573                                            DBUS_TYPE_INVALID)) {
1574                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1575                         r = -EIO;
1576                         goto finish;
1577                 }
1578
1579                 dbus_message_unref(m);
1580                 if (!(m = dbus_message_new_method_call(
1581                                       "org.freedesktop.systemd1",
1582                                       path,
1583                                       "org.freedesktop.DBus.Properties",
1584                                       "Get"))) {
1585                         log_error("Could not allocate message.");
1586                         r = -ENOMEM;
1587                         goto finish;
1588                 }
1589
1590                 if (!dbus_message_append_args(m,
1591                                               DBUS_TYPE_STRING, &interface,
1592                                               DBUS_TYPE_STRING, &property,
1593                                               DBUS_TYPE_INVALID)) {
1594                         log_error("Could not append arguments to message.");
1595                         r = -ENOMEM;
1596                         goto finish;
1597                 }
1598
1599                 dbus_message_unref(reply);
1600                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1601                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1602                         r = -EIO;
1603                         goto finish;
1604                 }
1605
1606                 if (!dbus_message_iter_init(reply, &iter) ||
1607                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1608                         log_error("Failed to parse reply.");
1609                         r = -EIO;
1610                         goto finish;
1611                 }
1612
1613                 dbus_message_iter_recurse(&iter, &sub);
1614
1615                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1616                         log_error("Failed to parse reply.");
1617                         r = -EIO;
1618                         goto finish;
1619                 }
1620
1621                 dbus_message_iter_get_basic(&sub, &state);
1622
1623                 if (!arg_quiet)
1624                         puts(state);
1625
1626                 if (streq(state, "active") || streq(state, "reloading"))
1627                         r = 0;
1628
1629                 dbus_message_unref(m);
1630                 dbus_message_unref(reply);
1631                 m = reply = NULL;
1632         }
1633
1634 finish:
1635         if (m)
1636                 dbus_message_unref(m);
1637
1638         if (reply)
1639                 dbus_message_unref(reply);
1640
1641         dbus_error_free(&error);
1642
1643         return r;
1644 }
1645
1646 static int kill_unit(DBusConnection *bus, char **args, unsigned n) {
1647         DBusMessage *m = NULL, *reply = NULL;
1648         int r = 0;
1649         DBusError error;
1650         unsigned i;
1651
1652         assert(bus);
1653         assert(args);
1654
1655         dbus_error_init(&error);
1656
1657         if (!arg_kill_who)
1658                 arg_kill_who = "all";
1659
1660         if (!arg_kill_mode)
1661                 arg_kill_mode = streq(arg_kill_who, "all") ? "control-group" : "process";
1662
1663         for (i = 1; i < n; i++) {
1664
1665                 if (!(m = dbus_message_new_method_call(
1666                                       "org.freedesktop.systemd1",
1667                                       "/org/freedesktop/systemd1",
1668                                       "org.freedesktop.systemd1.Manager",
1669                                       "KillUnit"))) {
1670                         log_error("Could not allocate message.");
1671                         r = -ENOMEM;
1672                         goto finish;
1673                 }
1674
1675                 if (!dbus_message_append_args(m,
1676                                               DBUS_TYPE_STRING, &args[i],
1677                                               DBUS_TYPE_STRING, &arg_kill_who,
1678                                               DBUS_TYPE_STRING, &arg_kill_mode,
1679                                               DBUS_TYPE_INT32, &arg_signal,
1680                                               DBUS_TYPE_INVALID)) {
1681                         log_error("Could not append arguments to message.");
1682                         r = -ENOMEM;
1683                         goto finish;
1684                 }
1685
1686                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1687                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1688                         dbus_error_free(&error);
1689                         r = -EIO;
1690                 }
1691
1692                 dbus_message_unref(m);
1693
1694                 if (reply)
1695                         dbus_message_unref(reply);
1696                 m = reply = NULL;
1697         }
1698
1699 finish:
1700         if (m)
1701                 dbus_message_unref(m);
1702
1703         if (reply)
1704                 dbus_message_unref(reply);
1705
1706         dbus_error_free(&error);
1707
1708         return r;
1709 }
1710
1711 typedef struct ExecStatusInfo {
1712         char *name;
1713
1714         char *path;
1715         char **argv;
1716
1717         bool ignore;
1718
1719         usec_t start_timestamp;
1720         usec_t exit_timestamp;
1721         pid_t pid;
1722         int code;
1723         int status;
1724
1725         LIST_FIELDS(struct ExecStatusInfo, exec);
1726 } ExecStatusInfo;
1727
1728 static void exec_status_info_free(ExecStatusInfo *i) {
1729         assert(i);
1730
1731         free(i->name);
1732         free(i->path);
1733         strv_free(i->argv);
1734         free(i);
1735 }
1736
1737 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1738         uint64_t start_timestamp, exit_timestamp, start_timestamp_monotonic, exit_timestamp_monotonic;
1739         DBusMessageIter sub2, sub3;
1740         const char*path;
1741         unsigned n;
1742         uint32_t pid;
1743         int32_t code, status;
1744         dbus_bool_t ignore;
1745
1746         assert(i);
1747         assert(i);
1748
1749         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1750                 return -EIO;
1751
1752         dbus_message_iter_recurse(sub, &sub2);
1753
1754         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1755                 return -EIO;
1756
1757         if (!(i->path = strdup(path)))
1758                 return -ENOMEM;
1759
1760         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1761             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1762                 return -EIO;
1763
1764         n = 0;
1765         dbus_message_iter_recurse(&sub2, &sub3);
1766         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1767                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1768                 dbus_message_iter_next(&sub3);
1769                 n++;
1770         }
1771
1772
1773         if (!(i->argv = new0(char*, n+1)))
1774                 return -ENOMEM;
1775
1776         n = 0;
1777         dbus_message_iter_recurse(&sub2, &sub3);
1778         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1779                 const char *s;
1780
1781                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1782                 dbus_message_iter_get_basic(&sub3, &s);
1783                 dbus_message_iter_next(&sub3);
1784
1785                 if (!(i->argv[n++] = strdup(s)))
1786                         return -ENOMEM;
1787         }
1788
1789         if (!dbus_message_iter_next(&sub2) ||
1790             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1791             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1792             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp_monotonic, true) < 0 ||
1793             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1794             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp_monotonic, true) < 0 ||
1795             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1796             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1797             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1798                 return -EIO;
1799
1800         i->ignore = ignore;
1801         i->start_timestamp = (usec_t) start_timestamp;
1802         i->exit_timestamp = (usec_t) exit_timestamp;
1803         i->pid = (pid_t) pid;
1804         i->code = code;
1805         i->status = status;
1806
1807         return 0;
1808 }
1809
1810 typedef struct UnitStatusInfo {
1811         const char *id;
1812         const char *load_state;
1813         const char *active_state;
1814         const char *sub_state;
1815
1816         const char *description;
1817         const char *following;
1818
1819         const char *path;
1820         const char *default_control_group;
1821
1822         usec_t inactive_exit_timestamp;
1823         usec_t active_enter_timestamp;
1824         usec_t active_exit_timestamp;
1825         usec_t inactive_enter_timestamp;
1826
1827         bool need_daemon_reload;
1828
1829         /* Service */
1830         pid_t main_pid;
1831         pid_t control_pid;
1832         const char *status_text;
1833         bool running:1;
1834 #ifdef HAVE_SYSV_COMPAT
1835         bool is_sysv:1;
1836 #endif
1837
1838         usec_t start_timestamp;
1839         usec_t exit_timestamp;
1840
1841         int exit_code, exit_status;
1842
1843         usec_t condition_timestamp;
1844         bool condition_result;
1845
1846         /* Socket */
1847         unsigned n_accepted;
1848         unsigned n_connections;
1849         bool accept;
1850
1851         /* Device */
1852         const char *sysfs_path;
1853
1854         /* Mount, Automount */
1855         const char *where;
1856
1857         /* Swap */
1858         const char *what;
1859
1860         LIST_HEAD(ExecStatusInfo, exec);
1861 } UnitStatusInfo;
1862
1863 static void print_status_info(UnitStatusInfo *i) {
1864         ExecStatusInfo *p;
1865         const char *on, *off, *ss;
1866         usec_t timestamp;
1867         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
1868         char since2[FORMAT_TIMESTAMP_MAX], *s2;
1869
1870         assert(i);
1871
1872         /* This shows pretty information about a unit. See
1873          * print_property() for a low-level property printer */
1874
1875         printf("%s", strna(i->id));
1876
1877         if (i->description && !streq_ptr(i->id, i->description))
1878                 printf(" - %s", i->description);
1879
1880         printf("\n");
1881
1882         if (i->following)
1883                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
1884
1885         if (streq_ptr(i->load_state, "failed") ||
1886             streq_ptr(i->load_state, "banned")) {
1887                 on = ansi_highlight(true);
1888                 off = ansi_highlight(false);
1889         } else
1890                 on = off = "";
1891
1892         if (i->path)
1893                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
1894         else
1895                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
1896
1897         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1898
1899         if (streq_ptr(i->active_state, "failed")) {
1900                 on = ansi_highlight(true);
1901                 off = ansi_highlight(false);
1902         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1903                 on = ansi_highlight_green(true);
1904                 off = ansi_highlight_green(false);
1905         } else
1906                 on = off = "";
1907
1908         if (ss)
1909                 printf("\t  Active: %s%s (%s)%s",
1910                        on,
1911                        strna(i->active_state),
1912                        ss,
1913                        off);
1914         else
1915                 printf("\t  Active: %s%s%s",
1916                        on,
1917                        strna(i->active_state),
1918                        off);
1919
1920         timestamp = (streq_ptr(i->active_state, "active")      ||
1921                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
1922                     (streq_ptr(i->active_state, "inactive")    ||
1923                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
1924                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
1925                                                                   i->active_exit_timestamp;
1926
1927         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
1928         s2 = format_timestamp(since2, sizeof(since2), timestamp);
1929
1930         if (s1)
1931                 printf(" since %s; %s\n", s2, s1);
1932         else if (s2)
1933                 printf(" since %s\n", s2);
1934         else
1935                 printf("\n");
1936
1937         if (!i->condition_result && i->condition_timestamp > 0) {
1938                 s1 = format_timestamp_pretty(since1, sizeof(since1), i->condition_timestamp);
1939                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
1940
1941                 if (s1)
1942                         printf("\t          start condition failed at %s; %s\n", s2, s1);
1943                 else if (s2)
1944                         printf("\t          start condition failed at %s\n", s2);
1945         }
1946
1947         if (i->sysfs_path)
1948                 printf("\t  Device: %s\n", i->sysfs_path);
1949         if (i->where)
1950                 printf("\t   Where: %s\n", i->where);
1951         if (i->what)
1952                 printf("\t    What: %s\n", i->what);
1953
1954         if (i->accept)
1955                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1956
1957         LIST_FOREACH(exec, p, i->exec) {
1958                 char *t;
1959                 bool good;
1960
1961                 /* Only show exited processes here */
1962                 if (p->code == 0)
1963                         continue;
1964
1965                 t = strv_join(p->argv, " ");
1966                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
1967                 free(t);
1968
1969 #ifdef HAVE_SYSV_COMPAT
1970                 if (i->is_sysv)
1971                         good = is_clean_exit_lsb(p->code, p->status);
1972                 else
1973 #endif
1974                         good = is_clean_exit(p->code, p->status);
1975
1976                 if (!good) {
1977                         on = ansi_highlight(true);
1978                         off = ansi_highlight(false);
1979                 } else
1980                         on = off = "";
1981
1982                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
1983
1984                 if (p->code == CLD_EXITED) {
1985                         const char *c;
1986
1987                         printf("status=%i", p->status);
1988
1989 #ifdef HAVE_SYSV_COMPAT
1990                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1991 #else
1992                         if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD)))
1993 #endif
1994                                 printf("/%s", c);
1995
1996                 } else
1997                         printf("signal=%s", signal_to_string(p->status));
1998
1999                 printf(")%s\n", off);
2000
2001                 on = off = NULL;
2002
2003                 if (i->main_pid == p->pid &&
2004                     i->start_timestamp == p->start_timestamp &&
2005                     i->exit_timestamp == p->start_timestamp)
2006                         /* Let's not show this twice */
2007                         i->main_pid = 0;
2008
2009                 if (p->pid == i->control_pid)
2010                         i->control_pid = 0;
2011         }
2012
2013         if (i->main_pid > 0 || i->control_pid > 0) {
2014                 printf("\t");
2015
2016                 if (i->main_pid > 0) {
2017                         printf("Main PID: %u", (unsigned) i->main_pid);
2018
2019                         if (i->running) {
2020                                 char *t = NULL;
2021                                 get_process_name(i->main_pid, &t);
2022                                 if (t) {
2023                                         printf(" (%s)", t);
2024                                         free(t);
2025                                 }
2026                         } else if (i->exit_code > 0) {
2027                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2028
2029                                 if (i->exit_code == CLD_EXITED) {
2030                                         const char *c;
2031
2032                                         printf("status=%i", i->exit_status);
2033
2034 #ifdef HAVE_SYSV_COMPAT
2035                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2036 #else
2037                                         if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD)))
2038 #endif
2039                                                 printf("/%s", c);
2040
2041                                 } else
2042                                         printf("signal=%s", signal_to_string(i->exit_status));
2043                                 printf(")");
2044                         }
2045                 }
2046
2047                 if (i->main_pid > 0 && i->control_pid > 0)
2048                         printf(";");
2049
2050                 if (i->control_pid > 0) {
2051                         char *t = NULL;
2052
2053                         printf(" Control: %u", (unsigned) i->control_pid);
2054
2055                         get_process_name(i->control_pid, &t);
2056                         if (t) {
2057                                 printf(" (%s)", t);
2058                                 free(t);
2059                         }
2060                 }
2061
2062                 printf("\n");
2063         }
2064
2065         if (i->status_text)
2066                 printf("\t  Status: \"%s\"\n", i->status_text);
2067
2068         if (i->default_control_group) {
2069                 unsigned c;
2070
2071                 printf("\t  CGroup: %s\n", i->default_control_group);
2072
2073                 if (arg_transport != TRANSPORT_SSH) {
2074                         if ((c = columns()) > 18)
2075                                 c -= 18;
2076                         else
2077                                 c = 0;
2078
2079                         show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
2080                 }
2081         }
2082
2083         if (i->need_daemon_reload)
2084                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2085                        ansi_highlight(true),
2086                        ansi_highlight(false),
2087                        arg_user ? "--user" : "--system");
2088 }
2089
2090 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2091
2092         switch (dbus_message_iter_get_arg_type(iter)) {
2093
2094         case DBUS_TYPE_STRING: {
2095                 const char *s;
2096
2097                 dbus_message_iter_get_basic(iter, &s);
2098
2099                 if (s[0]) {
2100                         if (streq(name, "Id"))
2101                                 i->id = s;
2102                         else if (streq(name, "LoadState"))
2103                                 i->load_state = s;
2104                         else if (streq(name, "ActiveState"))
2105                                 i->active_state = s;
2106                         else if (streq(name, "SubState"))
2107                                 i->sub_state = s;
2108                         else if (streq(name, "Description"))
2109                                 i->description = s;
2110                         else if (streq(name, "FragmentPath"))
2111                                 i->path = s;
2112 #ifdef HAVE_SYSV_COMPAT
2113                         else if (streq(name, "SysVPath")) {
2114                                 i->is_sysv = true;
2115                                 i->path = s;
2116                         }
2117 #endif
2118                         else if (streq(name, "DefaultControlGroup"))
2119                                 i->default_control_group = s;
2120                         else if (streq(name, "StatusText"))
2121                                 i->status_text = s;
2122                         else if (streq(name, "SysFSPath"))
2123                                 i->sysfs_path = s;
2124                         else if (streq(name, "Where"))
2125                                 i->where = s;
2126                         else if (streq(name, "What"))
2127                                 i->what = s;
2128                         else if (streq(name, "Following"))
2129                                 i->following = s;
2130                 }
2131
2132                 break;
2133         }
2134
2135         case DBUS_TYPE_BOOLEAN: {
2136                 dbus_bool_t b;
2137
2138                 dbus_message_iter_get_basic(iter, &b);
2139
2140                 if (streq(name, "Accept"))
2141                         i->accept = b;
2142                 else if (streq(name, "NeedDaemonReload"))
2143                         i->need_daemon_reload = b;
2144                 else if (streq(name, "ConditionResult"))
2145                         i->condition_result = b;
2146
2147                 break;
2148         }
2149
2150         case DBUS_TYPE_UINT32: {
2151                 uint32_t u;
2152
2153                 dbus_message_iter_get_basic(iter, &u);
2154
2155                 if (streq(name, "MainPID")) {
2156                         if (u > 0) {
2157                                 i->main_pid = (pid_t) u;
2158                                 i->running = true;
2159                         }
2160                 } else if (streq(name, "ControlPID"))
2161                         i->control_pid = (pid_t) u;
2162                 else if (streq(name, "ExecMainPID")) {
2163                         if (u > 0)
2164                                 i->main_pid = (pid_t) u;
2165                 } else if (streq(name, "NAccepted"))
2166                         i->n_accepted = u;
2167                 else if (streq(name, "NConnections"))
2168                         i->n_connections = u;
2169
2170                 break;
2171         }
2172
2173         case DBUS_TYPE_INT32: {
2174                 int32_t j;
2175
2176                 dbus_message_iter_get_basic(iter, &j);
2177
2178                 if (streq(name, "ExecMainCode"))
2179                         i->exit_code = (int) j;
2180                 else if (streq(name, "ExecMainStatus"))
2181                         i->exit_status = (int) j;
2182
2183                 break;
2184         }
2185
2186         case DBUS_TYPE_UINT64: {
2187                 uint64_t u;
2188
2189                 dbus_message_iter_get_basic(iter, &u);
2190
2191                 if (streq(name, "ExecMainStartTimestamp"))
2192                         i->start_timestamp = (usec_t) u;
2193                 else if (streq(name, "ExecMainExitTimestamp"))
2194                         i->exit_timestamp = (usec_t) u;
2195                 else if (streq(name, "ActiveEnterTimestamp"))
2196                         i->active_enter_timestamp = (usec_t) u;
2197                 else if (streq(name, "InactiveEnterTimestamp"))
2198                         i->inactive_enter_timestamp = (usec_t) u;
2199                 else if (streq(name, "InactiveExitTimestamp"))
2200                         i->inactive_exit_timestamp = (usec_t) u;
2201                 else if (streq(name, "ActiveExitTimestamp"))
2202                         i->active_exit_timestamp = (usec_t) u;
2203                 else if (streq(name, "ConditionTimestamp"))
2204                         i->condition_timestamp = (usec_t) u;
2205
2206                 break;
2207         }
2208
2209         case DBUS_TYPE_ARRAY: {
2210
2211                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2212                     startswith(name, "Exec")) {
2213                         DBusMessageIter sub;
2214
2215                         dbus_message_iter_recurse(iter, &sub);
2216                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2217                                 ExecStatusInfo *info;
2218                                 int r;
2219
2220                                 if (!(info = new0(ExecStatusInfo, 1)))
2221                                         return -ENOMEM;
2222
2223                                 if (!(info->name = strdup(name))) {
2224                                         free(info);
2225                                         return -ENOMEM;
2226                                 }
2227
2228                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2229                                         free(info);
2230                                         return r;
2231                                 }
2232
2233                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2234
2235                                 dbus_message_iter_next(&sub);
2236                         }
2237                 }
2238
2239                 break;
2240         }
2241         }
2242
2243         return 0;
2244 }
2245
2246 static int print_property(const char *name, DBusMessageIter *iter) {
2247         assert(name);
2248         assert(iter);
2249
2250         /* This is a low-level property printer, see
2251          * print_status_info() for the nicer output */
2252
2253         if (arg_property && !strv_find(arg_property, name))
2254                 return 0;
2255
2256         switch (dbus_message_iter_get_arg_type(iter)) {
2257
2258         case DBUS_TYPE_STRING: {
2259                 const char *s;
2260                 dbus_message_iter_get_basic(iter, &s);
2261
2262                 if (arg_all || s[0])
2263                         printf("%s=%s\n", name, s);
2264
2265                 return 0;
2266         }
2267
2268         case DBUS_TYPE_BOOLEAN: {
2269                 dbus_bool_t b;
2270                 dbus_message_iter_get_basic(iter, &b);
2271                 printf("%s=%s\n", name, yes_no(b));
2272
2273                 return 0;
2274         }
2275
2276         case DBUS_TYPE_UINT64: {
2277                 uint64_t u;
2278                 dbus_message_iter_get_basic(iter, &u);
2279
2280                 /* Yes, heuristics! But we can change this check
2281                  * should it turn out to not be sufficient */
2282
2283                 if (endswith(name, "Timestamp")) {
2284                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
2285
2286                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
2287                                 printf("%s=%s\n", name, strempty(t));
2288                 } else if (strstr(name, "USec")) {
2289                         char timespan[FORMAT_TIMESPAN_MAX];
2290
2291                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
2292                 } else
2293                         printf("%s=%llu\n", name, (unsigned long long) u);
2294
2295                 return 0;
2296         }
2297
2298         case DBUS_TYPE_UINT32: {
2299                 uint32_t u;
2300                 dbus_message_iter_get_basic(iter, &u);
2301
2302                 if (strstr(name, "UMask") || strstr(name, "Mode"))
2303                         printf("%s=%04o\n", name, u);
2304                 else
2305                         printf("%s=%u\n", name, (unsigned) u);
2306
2307                 return 0;
2308         }
2309
2310         case DBUS_TYPE_INT32: {
2311                 int32_t i;
2312                 dbus_message_iter_get_basic(iter, &i);
2313
2314                 printf("%s=%i\n", name, (int) i);
2315                 return 0;
2316         }
2317
2318         case DBUS_TYPE_DOUBLE: {
2319                 double d;
2320                 dbus_message_iter_get_basic(iter, &d);
2321
2322                 printf("%s=%g\n", name, d);
2323                 return 0;
2324         }
2325
2326         case DBUS_TYPE_STRUCT: {
2327                 DBusMessageIter sub;
2328                 dbus_message_iter_recurse(iter, &sub);
2329
2330                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2331                         uint32_t u;
2332
2333                         dbus_message_iter_get_basic(&sub, &u);
2334
2335                         if (u)
2336                                 printf("%s=%u\n", name, (unsigned) u);
2337                         else if (arg_all)
2338                                 printf("%s=\n", name);
2339
2340                         return 0;
2341                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2342                         const char *s;
2343
2344                         dbus_message_iter_get_basic(&sub, &s);
2345
2346                         if (arg_all || s[0])
2347                                 printf("%s=%s\n", name, s);
2348
2349                         return 0;
2350                 }
2351
2352                 break;
2353         }
2354
2355         case DBUS_TYPE_ARRAY:
2356
2357                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
2358                         DBusMessageIter sub;
2359                         bool space = false;
2360
2361                         dbus_message_iter_recurse(iter, &sub);
2362                         if (arg_all ||
2363                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2364                                 printf("%s=", name);
2365
2366                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2367                                         const char *s;
2368
2369                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
2370                                         dbus_message_iter_get_basic(&sub, &s);
2371                                         printf("%s%s", space ? " " : "", s);
2372
2373                                         space = true;
2374                                         dbus_message_iter_next(&sub);
2375                                 }
2376
2377                                 puts("");
2378                         }
2379
2380                         return 0;
2381
2382                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
2383                         DBusMessageIter sub;
2384
2385                         dbus_message_iter_recurse(iter, &sub);
2386                         if (arg_all ||
2387                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2388                                 printf("%s=", name);
2389
2390                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2391                                         uint8_t u;
2392
2393                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
2394                                         dbus_message_iter_get_basic(&sub, &u);
2395                                         printf("%02x", u);
2396
2397                                         dbus_message_iter_next(&sub);
2398                                 }
2399
2400                                 puts("");
2401                         }
2402
2403                         return 0;
2404
2405                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2406                         DBusMessageIter sub, sub2;
2407
2408                         dbus_message_iter_recurse(iter, &sub);
2409                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2410                                 const char *path;
2411                                 dbus_bool_t ignore;
2412
2413                                 dbus_message_iter_recurse(&sub, &sub2);
2414
2415                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2416                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2417                                         printf("EnvironmentFile=%s (ignore=%s)\n", path, yes_no(ignore));
2418
2419                                 dbus_message_iter_next(&sub);
2420                         }
2421
2422                         return 0;
2423
2424                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2425                         DBusMessageIter sub, sub2;
2426
2427                         dbus_message_iter_recurse(iter, &sub);
2428                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2429                                 const char *type, *path;
2430
2431                                 dbus_message_iter_recurse(&sub, &sub2);
2432
2433                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2434                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2435                                         printf("%s=%s\n", type, path);
2436
2437                                 dbus_message_iter_next(&sub);
2438                         }
2439
2440                         return 0;
2441
2442                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2443                         DBusMessageIter sub, sub2;
2444
2445                         dbus_message_iter_recurse(iter, &sub);
2446                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2447                                 const char *base;
2448                                 uint64_t value, next_elapse;
2449
2450                                 dbus_message_iter_recurse(&sub, &sub2);
2451
2452                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2453                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2454                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2455                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2456
2457                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2458                                                base,
2459                                                format_timespan(timespan1, sizeof(timespan1), value),
2460                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2461                                 }
2462
2463                                 dbus_message_iter_next(&sub);
2464                         }
2465
2466                         return 0;
2467
2468                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2469                         DBusMessageIter sub;
2470
2471                         dbus_message_iter_recurse(iter, &sub);
2472                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2473                                 ExecStatusInfo info;
2474
2475                                 zero(info);
2476                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2477                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2478                                         char *t;
2479
2480                                         t = strv_join(info.argv, " ");
2481
2482                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2483                                                name,
2484                                                strna(info.path),
2485                                                strna(t),
2486                                                yes_no(info.ignore),
2487                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2488                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2489                                                (unsigned) info. pid,
2490                                                sigchld_code_to_string(info.code),
2491                                                info.status,
2492                                                info.code == CLD_EXITED ? "" : "/",
2493                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2494
2495                                         free(t);
2496                                 }
2497
2498                                 free(info.path);
2499                                 strv_free(info.argv);
2500
2501                                 dbus_message_iter_next(&sub);
2502                         }
2503
2504                         return 0;
2505                 }
2506
2507                 break;
2508         }
2509
2510         if (arg_all)
2511                 printf("%s=[unprintable]\n", name);
2512
2513         return 0;
2514 }
2515
2516 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2517         DBusMessage *m = NULL, *reply = NULL;
2518         const char *interface = "";
2519         int r;
2520         DBusError error;
2521         DBusMessageIter iter, sub, sub2, sub3;
2522         UnitStatusInfo info;
2523         ExecStatusInfo *p;
2524
2525         assert(bus);
2526         assert(path);
2527         assert(new_line);
2528
2529         zero(info);
2530         dbus_error_init(&error);
2531
2532         if (!(m = dbus_message_new_method_call(
2533                               "org.freedesktop.systemd1",
2534                               path,
2535                               "org.freedesktop.DBus.Properties",
2536                               "GetAll"))) {
2537                 log_error("Could not allocate message.");
2538                 r = -ENOMEM;
2539                 goto finish;
2540         }
2541
2542         if (!dbus_message_append_args(m,
2543                                       DBUS_TYPE_STRING, &interface,
2544                                       DBUS_TYPE_INVALID)) {
2545                 log_error("Could not append arguments to message.");
2546                 r = -ENOMEM;
2547                 goto finish;
2548         }
2549
2550         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2551                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2552                 r = -EIO;
2553                 goto finish;
2554         }
2555
2556         if (!dbus_message_iter_init(reply, &iter) ||
2557             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2558             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2559                 log_error("Failed to parse reply.");
2560                 r = -EIO;
2561                 goto finish;
2562         }
2563
2564         dbus_message_iter_recurse(&iter, &sub);
2565
2566         if (*new_line)
2567                 printf("\n");
2568
2569         *new_line = true;
2570
2571         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2572                 const char *name;
2573
2574                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2575                         log_error("Failed to parse reply.");
2576                         r = -EIO;
2577                         goto finish;
2578                 }
2579
2580                 dbus_message_iter_recurse(&sub, &sub2);
2581
2582                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2583                         log_error("Failed to parse reply.");
2584                         r = -EIO;
2585                         goto finish;
2586                 }
2587
2588                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2589                         log_error("Failed to parse reply.");
2590                         r = -EIO;
2591                         goto finish;
2592                 }
2593
2594                 dbus_message_iter_recurse(&sub2, &sub3);
2595
2596                 if (show_properties)
2597                         r = print_property(name, &sub3);
2598                 else
2599                         r = status_property(name, &sub3, &info);
2600
2601                 if (r < 0) {
2602                         log_error("Failed to parse reply.");
2603                         r = -EIO;
2604                         goto finish;
2605                 }
2606
2607                 dbus_message_iter_next(&sub);
2608         }
2609
2610         r = 0;
2611
2612         if (!show_properties)
2613                 print_status_info(&info);
2614
2615         if (!streq_ptr(info.active_state, "active") &&
2616             !streq_ptr(info.active_state, "reloading") &&
2617             streq(verb, "status"))
2618                 /* According to LSB: "program not running" */
2619                 r = 3;
2620
2621         while ((p = info.exec)) {
2622                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2623                 exec_status_info_free(p);
2624         }
2625
2626 finish:
2627         if (m)
2628                 dbus_message_unref(m);
2629
2630         if (reply)
2631                 dbus_message_unref(reply);
2632
2633         dbus_error_free(&error);
2634
2635         return r;
2636 }
2637
2638 static int show(DBusConnection *bus, char **args, unsigned n) {
2639         DBusMessage *m = NULL, *reply = NULL;
2640         int r, ret = 0;
2641         DBusError error;
2642         unsigned i;
2643         bool show_properties, new_line = false;
2644
2645         assert(bus);
2646         assert(args);
2647
2648         dbus_error_init(&error);
2649
2650         show_properties = !streq(args[0], "status");
2651
2652         if (show_properties)
2653                 pager_open();
2654
2655         if (show_properties && n <= 1) {
2656                 /* If not argument is specified inspect the manager
2657                  * itself */
2658
2659                 ret = show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2660                 goto finish;
2661         }
2662
2663         for (i = 1; i < n; i++) {
2664                 const char *path = NULL;
2665                 uint32_t id;
2666
2667                 if (safe_atou32(args[i], &id) < 0) {
2668
2669                         /* Interpret as unit name */
2670
2671                         if (!(m = dbus_message_new_method_call(
2672                                               "org.freedesktop.systemd1",
2673                                               "/org/freedesktop/systemd1",
2674                                               "org.freedesktop.systemd1.Manager",
2675                                               "LoadUnit"))) {
2676                                 log_error("Could not allocate message.");
2677                                 ret = -ENOMEM;
2678                                 goto finish;
2679                         }
2680
2681                         if (!dbus_message_append_args(m,
2682                                                       DBUS_TYPE_STRING, &args[i],
2683                                                       DBUS_TYPE_INVALID)) {
2684                                 log_error("Could not append arguments to message.");
2685                                 ret = -ENOMEM;
2686                                 goto finish;
2687                         }
2688
2689                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2690
2691                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2692                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2693                                         ret = -EIO;
2694                                         goto finish;
2695                                 }
2696
2697                                 dbus_error_free(&error);
2698
2699                                 dbus_message_unref(m);
2700                                 if (!(m = dbus_message_new_method_call(
2701                                                       "org.freedesktop.systemd1",
2702                                                       "/org/freedesktop/systemd1",
2703                                                       "org.freedesktop.systemd1.Manager",
2704                                                       "GetUnit"))) {
2705                                         log_error("Could not allocate message.");
2706                                         ret = -ENOMEM;
2707                                         goto finish;
2708                                 }
2709
2710                                 if (!dbus_message_append_args(m,
2711                                                               DBUS_TYPE_STRING, &args[i],
2712                                                               DBUS_TYPE_INVALID)) {
2713                                         log_error("Could not append arguments to message.");
2714                                         ret = -ENOMEM;
2715                                         goto finish;
2716                                 }
2717
2718                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2719                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2720
2721                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2722                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2723                                         else
2724                                                 ret = -EIO;
2725                                         goto finish;
2726                                 }
2727                         }
2728
2729                 } else if (show_properties) {
2730
2731                         /* Interpret as job id */
2732
2733                         if (!(m = dbus_message_new_method_call(
2734                                               "org.freedesktop.systemd1",
2735                                               "/org/freedesktop/systemd1",
2736                                               "org.freedesktop.systemd1.Manager",
2737                                               "GetJob"))) {
2738                                 log_error("Could not allocate message.");
2739                                 ret = -ENOMEM;
2740                                 goto finish;
2741                         }
2742
2743                         if (!dbus_message_append_args(m,
2744                                                       DBUS_TYPE_UINT32, &id,
2745                                                       DBUS_TYPE_INVALID)) {
2746                                 log_error("Could not append arguments to message.");
2747                                 ret = -ENOMEM;
2748                                 goto finish;
2749                         }
2750
2751                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2752                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2753                                 ret = -EIO;
2754                                 goto finish;
2755                         }
2756                 } else {
2757
2758                         /* Interpret as PID */
2759
2760                         if (!(m = dbus_message_new_method_call(
2761                                               "org.freedesktop.systemd1",
2762                                               "/org/freedesktop/systemd1",
2763                                               "org.freedesktop.systemd1.Manager",
2764                                               "GetUnitByPID"))) {
2765                                 log_error("Could not allocate message.");
2766                                 ret = -ENOMEM;
2767                                 goto finish;
2768                         }
2769
2770                         if (!dbus_message_append_args(m,
2771                                                       DBUS_TYPE_UINT32, &id,
2772                                                       DBUS_TYPE_INVALID)) {
2773                                 log_error("Could not append arguments to message.");
2774                                 ret = -ENOMEM;
2775                                 goto finish;
2776                         }
2777
2778                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2779                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2780                                 ret = -EIO;
2781                                 goto finish;
2782                         }
2783                 }
2784
2785                 if (!dbus_message_get_args(reply, &error,
2786                                            DBUS_TYPE_OBJECT_PATH, &path,
2787                                            DBUS_TYPE_INVALID)) {
2788                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2789                         ret = -EIO;
2790                         goto finish;
2791                 }
2792
2793                 if ((r = show_one(args[0], bus, path, show_properties, &new_line)) != 0)
2794                         ret = r;
2795
2796                 dbus_message_unref(m);
2797                 dbus_message_unref(reply);
2798                 m = reply = NULL;
2799         }
2800
2801 finish:
2802         if (m)
2803                 dbus_message_unref(m);
2804
2805         if (reply)
2806                 dbus_message_unref(reply);
2807
2808         dbus_error_free(&error);
2809
2810         return ret;
2811 }
2812
2813 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2814         DBusError error;
2815         DBusMessage *m = NULL, *reply = NULL;
2816
2817         assert(connection);
2818         assert(message);
2819
2820         dbus_error_init(&error);
2821
2822         log_debug("Got D-Bus request: %s.%s() on %s",
2823                   dbus_message_get_interface(message),
2824                   dbus_message_get_member(message),
2825                   dbus_message_get_path(message));
2826
2827         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2828                 log_error("Warning! D-Bus connection terminated.");
2829                 dbus_connection_close(connection);
2830
2831         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2832                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2833                 const char *id, *path;
2834
2835                 if (!dbus_message_get_args(message, &error,
2836                                            DBUS_TYPE_STRING, &id,
2837                                            DBUS_TYPE_OBJECT_PATH, &path,
2838                                            DBUS_TYPE_INVALID))
2839                         log_error("Failed to parse message: %s", bus_error_message(&error));
2840                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2841                         printf("Unit %s added.\n", id);
2842                 else
2843                         printf("Unit %s removed.\n", id);
2844
2845         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew")) {
2846                 uint32_t id;
2847                 const char *path;
2848
2849                 if (!dbus_message_get_args(message, &error,
2850                                            DBUS_TYPE_UINT32, &id,
2851                                            DBUS_TYPE_OBJECT_PATH, &path,
2852                                            DBUS_TYPE_INVALID))
2853                         log_error("Failed to parse message: %s", bus_error_message(&error));
2854                 else
2855                         printf("Job %u added.\n", id);
2856
2857
2858         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2859                 uint32_t id;
2860                 const char *path, *result;
2861
2862                 if (!dbus_message_get_args(message, &error,
2863                                            DBUS_TYPE_UINT32, &id,
2864                                            DBUS_TYPE_OBJECT_PATH, &path,
2865                                            DBUS_TYPE_STRING, &result,
2866                                            DBUS_TYPE_INVALID))
2867                         log_error("Failed to parse message: %s", bus_error_message(&error));
2868                 else
2869                         printf("Job %u removed (result=%s).\n", id, result);
2870
2871
2872         } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) {
2873
2874                 const char *path, *interface, *property = "Id";
2875                 DBusMessageIter iter, sub;
2876
2877                 path = dbus_message_get_path(message);
2878
2879                 if (!dbus_message_get_args(message, &error,
2880                                           DBUS_TYPE_STRING, &interface,
2881                                           DBUS_TYPE_INVALID)) {
2882                         log_error("Failed to parse message: %s", bus_error_message(&error));
2883                         goto finish;
2884                 }
2885
2886                 if (!streq(interface, "org.freedesktop.systemd1.Job") &&
2887                     !streq(interface, "org.freedesktop.systemd1.Unit"))
2888                         goto finish;
2889
2890                 if (!(m = dbus_message_new_method_call(
2891                               "org.freedesktop.systemd1",
2892                               path,
2893                               "org.freedesktop.DBus.Properties",
2894                               "Get"))) {
2895                         log_error("Could not allocate message.");
2896                         goto oom;
2897                 }
2898
2899                 if (!dbus_message_append_args(m,
2900                                               DBUS_TYPE_STRING, &interface,
2901                                               DBUS_TYPE_STRING, &property,
2902                                               DBUS_TYPE_INVALID)) {
2903                         log_error("Could not append arguments to message.");
2904                         goto finish;
2905                 }
2906
2907                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2908                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2909                         goto finish;
2910                 }
2911
2912                 if (!dbus_message_iter_init(reply, &iter) ||
2913                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2914                         log_error("Failed to parse reply.");
2915                         goto finish;
2916                 }
2917
2918                 dbus_message_iter_recurse(&iter, &sub);
2919
2920                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2921                         const char *id;
2922
2923                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2924                                 log_error("Failed to parse reply.");
2925                                 goto finish;
2926                         }
2927
2928                         dbus_message_iter_get_basic(&sub, &id);
2929                         printf("Unit %s changed.\n", id);
2930                 } else {
2931                         uint32_t id;
2932
2933                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2934                                 log_error("Failed to parse reply.");
2935                                 goto finish;
2936                         }
2937
2938                         dbus_message_iter_get_basic(&sub, &id);
2939                         printf("Job %u changed.\n", id);
2940                 }
2941         }
2942
2943 finish:
2944         if (m)
2945                 dbus_message_unref(m);
2946
2947         if (reply)
2948                 dbus_message_unref(reply);
2949
2950         dbus_error_free(&error);
2951         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2952
2953 oom:
2954         if (m)
2955                 dbus_message_unref(m);
2956
2957         if (reply)
2958                 dbus_message_unref(reply);
2959
2960         dbus_error_free(&error);
2961         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2962 }
2963
2964 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2965         DBusMessage *m = NULL, *reply = NULL;
2966         DBusError error;
2967         int r;
2968
2969         dbus_error_init(&error);
2970
2971         if (!private_bus) {
2972                 dbus_bus_add_match(bus,
2973                                    "type='signal',"
2974                                    "sender='org.freedesktop.systemd1',"
2975                                    "interface='org.freedesktop.systemd1.Manager',"
2976                                    "path='/org/freedesktop/systemd1'",
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                 dbus_bus_add_match(bus,
2986                                    "type='signal',"
2987                                    "sender='org.freedesktop.systemd1',"
2988                                    "interface='org.freedesktop.DBus.Properties',"
2989                                    "member='PropertiesChanged'",
2990                                    &error);
2991
2992                 if (dbus_error_is_set(&error)) {
2993                         log_error("Failed to add match: %s", bus_error_message(&error));
2994                         r = -EIO;
2995                         goto finish;
2996                 }
2997         }
2998
2999         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
3000                 log_error("Failed to add filter.");
3001                 r = -ENOMEM;
3002                 goto finish;
3003         }
3004
3005         if (!(m = dbus_message_new_method_call(
3006                               "org.freedesktop.systemd1",
3007                               "/org/freedesktop/systemd1",
3008                               "org.freedesktop.systemd1.Manager",
3009                               "Subscribe"))) {
3010                 log_error("Could not allocate message.");
3011                 r = -ENOMEM;
3012                 goto finish;
3013         }
3014
3015         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3016                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3017                 r = -EIO;
3018                 goto finish;
3019         }
3020
3021         while (dbus_connection_read_write_dispatch(bus, -1))
3022                 ;
3023
3024         r = 0;
3025
3026 finish:
3027
3028         /* This is slightly dirty, since we don't undo the filter or the matches. */
3029
3030         if (m)
3031                 dbus_message_unref(m);
3032
3033         if (reply)
3034                 dbus_message_unref(reply);
3035
3036         dbus_error_free(&error);
3037
3038         return r;
3039 }
3040
3041 static int dump(DBusConnection *bus, char **args, unsigned n) {
3042         DBusMessage *m = NULL, *reply = NULL;
3043         DBusError error;
3044         int r;
3045         const char *text;
3046
3047         dbus_error_init(&error);
3048
3049         pager_open();
3050
3051         if (!(m = dbus_message_new_method_call(
3052                               "org.freedesktop.systemd1",
3053                               "/org/freedesktop/systemd1",
3054                               "org.freedesktop.systemd1.Manager",
3055                               "Dump"))) {
3056                 log_error("Could not allocate message.");
3057                 return -ENOMEM;
3058         }
3059
3060         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3061                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3062                 r = -EIO;
3063                 goto finish;
3064         }
3065
3066         if (!dbus_message_get_args(reply, &error,
3067                                    DBUS_TYPE_STRING, &text,
3068                                    DBUS_TYPE_INVALID)) {
3069                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3070                 r = -EIO;
3071                 goto finish;
3072         }
3073
3074         fputs(text, stdout);
3075
3076         r = 0;
3077
3078 finish:
3079         if (m)
3080                 dbus_message_unref(m);
3081
3082         if (reply)
3083                 dbus_message_unref(reply);
3084
3085         dbus_error_free(&error);
3086
3087         return r;
3088 }
3089
3090 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
3091         DBusMessage *m = NULL, *reply = NULL;
3092         DBusError error;
3093         int r;
3094         const char *name = "", *path, *id;
3095         dbus_bool_t cleanup = FALSE;
3096         DBusMessageIter iter, sub;
3097         const char
3098                 *interface = "org.freedesktop.systemd1.Unit",
3099                 *property = "Id";
3100
3101         dbus_error_init(&error);
3102
3103         if (!(m = dbus_message_new_method_call(
3104                               "org.freedesktop.systemd1",
3105                               "/org/freedesktop/systemd1",
3106                               "org.freedesktop.systemd1.Manager",
3107                               "CreateSnapshot"))) {
3108                 log_error("Could not allocate message.");
3109                 return -ENOMEM;
3110         }
3111
3112         if (n > 1)
3113                 name = args[1];
3114
3115         if (!dbus_message_append_args(m,
3116                                       DBUS_TYPE_STRING, &name,
3117                                       DBUS_TYPE_BOOLEAN, &cleanup,
3118                                       DBUS_TYPE_INVALID)) {
3119                 log_error("Could not append arguments to message.");
3120                 r = -ENOMEM;
3121                 goto finish;
3122         }
3123
3124         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3125                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3126                 r = -EIO;
3127                 goto finish;
3128         }
3129
3130         if (!dbus_message_get_args(reply, &error,
3131                                    DBUS_TYPE_OBJECT_PATH, &path,
3132                                    DBUS_TYPE_INVALID)) {
3133                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3134                 r = -EIO;
3135                 goto finish;
3136         }
3137
3138         dbus_message_unref(m);
3139         if (!(m = dbus_message_new_method_call(
3140                               "org.freedesktop.systemd1",
3141                               path,
3142