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
  36 #include <dbus/dbus.h>
  37
  38 #include "log.h"
  39 #include "util.h"
  40 #include "macro.h"
  41 #include "set.h"
  42 #include "utmp-wtmp.h"
  43 #include "special.h"
  44 #include "initreq.h"
  45 #include "strv.h"
  46 #include "dbus-common.h"
  47 #include "cgroup-show.h"
  48 #include "cgroup-util.h"
  49 #include "list.h"
  50 #include "path-lookup.h"
  51 #include "conf-parser.h"
  52 #include "sd-daemon.h"
  53 #include "shutdownd.h"
  54 #include "exit-status.h"
  55 #include "bus-errors.h"
  56 #include "build.h"
  57 #include "unit-name.h"
  58
  59 static const char *arg_type = NULL;
  60 static char **arg_property = NULL;
  61 static bool arg_all = false;
  62 static bool arg_fail = false;
  63 static bool arg_session = false;
  64 static bool arg_global = false;
  65 static bool arg_immediate = false;
  66 static bool arg_no_block = false;
  67 static bool arg_no_wtmp = false;
  68 static bool arg_no_sync = false;
  69 static bool arg_no_wall = false;
  70 static bool arg_no_reload = false;
  71 static bool arg_dry = false;
  72 static bool arg_quiet = false;
  73 static bool arg_full = false;
  74 static bool arg_force = false;
  75 static bool arg_defaults = false;
  76 static char **arg_wall = NULL;
  77 static usec_t arg_when = 0;
  78 static enum action {
  79         ACTION_INVALID,
  80         ACTION_SYSTEMCTL,
  81         ACTION_HALT,
  82         ACTION_POWEROFF,
  83         ACTION_REBOOT,
  84         ACTION_RUNLEVEL2,
  85         ACTION_RUNLEVEL3,
  86         ACTION_RUNLEVEL4,
  87         ACTION_RUNLEVEL5,
  88         ACTION_RESCUE,
  89         ACTION_EMERGENCY,
  90         ACTION_DEFAULT,
  91         ACTION_RELOAD,
  92         ACTION_REEXEC,
  93         ACTION_RUNLEVEL,
  94         ACTION_CANCEL_SHUTDOWN,
  95         _ACTION_MAX
  96 } arg_action = ACTION_SYSTEMCTL;
  97 static enum dot {
  98         DOT_ALL,
  99         DOT_ORDER,
 100         DOT_REQUIRE
 101 } arg_dot = DOT_ALL;
 102
 103 static bool private_bus = false;
 104
 105 static int daemon_reload(DBusConnection *bus, char **args, unsigned n);
 106
 107 static bool on_tty(void) {
 108         static int t = -1;
 109
 110         if (_unlikely_(t < 0))
 111                 t = isatty(STDOUT_FILENO) > 0;
 112
 113         return t;
 114 }
 115
 116 static const char *ansi_highlight(bool b) {
 117
 118         if (!on_tty())
 119                 return "";
 120
 121         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
 122 }
 123
 124 static const char *ansi_highlight_green(bool b) {
 125
 126         if (!on_tty())
 127                 return "";
 128
 129         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
 130 }
 131
 132 static bool error_is_no_service(const DBusError *error) {
 133         assert(error);
 134
 135         if (!dbus_error_is_set(error))
 136                 return false;
 137
 138         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
 139                 return true;
 140
 141         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
 142                 return true;
 143
 144         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
 145 }
 146
 147 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
 148         assert(error);
 149
 150         if (!dbus_error_is_set(error))
 151                 return r;
 152
 153         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
 154             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
 155             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
 156             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
 157                 return EXIT_NOPERMISSION;
 158
 159         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
 160                 return EXIT_NOTINSTALLED;
 161
 162         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
 163             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
 164                 return EXIT_NOTIMPLEMENTED;
 165
 166         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
 167                 return EXIT_NOTCONFIGURED;
 168
 169         if (r != 0)
 170                 return r;
 171
 172         return EXIT_FAILURE;
 173 }
 174
 175 static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
 176
 177         assert(iter);
 178         assert(data);
 179
 180         if (dbus_message_iter_get_arg_type(iter) != type)
 181                 return -EIO;
 182
 183         dbus_message_iter_get_basic(iter, data);
 184
 185         if (!dbus_message_iter_next(iter) != !next)
 186                 return -EIO;
 187
 188         return 0;
 189 }
 190
 191 static void warn_wall(enum action action) {
 192         static const char *table[_ACTION_MAX] = {
 193                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
 194                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
 195                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
 196                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
 197                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
 198         };
 199
 200         if (arg_no_wall)
 201                 return;
 202
 203         if (arg_wall) {
 204                 char *p;
 205
 206                 if (!(p = strv_join(arg_wall, " "))) {
 207                         log_error("Failed to join strings.");
 208                         return;
 209                 }
 210
 211                 if (*p) {
 212                         utmp_wall(p);
 213                         free(p);
 214                         return;
 215                 }
 216
 217                 free(p);
 218         }
 219
 220         if (!table[action])
 221                 return;
 222
 223         utmp_wall(table[action]);
 224 }
 225
 226 struct unit_info {
 227         const char *id;
 228         const char *description;
 229         const char *load_state;
 230         const char *active_state;
 231         const char *sub_state;
 232         const char *following;
 233         const char *unit_path;
 234         uint32_t job_id;
 235         const char *job_type;
 236         const char *job_path;
 237 };
 238
 239 static int compare_unit_info(const void *a, const void *b) {
 240         const char *d1, *d2;
 241         const struct unit_info *u = a, *v = b;
 242
 243         d1 = strrchr(u->id, '.');
 244         d2 = strrchr(v->id, '.');
 245
 246         if (d1 && d2) {
 247                 int r;
 248
 249                 if ((r = strcasecmp(d1, d2)) != 0)
 250                         return r;
 251         }
 252
 253         return strcasecmp(u->id, v->id);
 254 }
 255
 256 static bool output_show_job(const struct unit_info *u) {
 257         const char *dot;
 258
 259         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
 260                               streq(dot+1, arg_type))) &&
 261                 (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0);
 262 }
 263
 264 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
 265         unsigned active_len, sub_len, job_len;
 266         const struct unit_info *u;
 267
 268         active_len = sizeof("ACTIVE")-1;
 269         sub_len = sizeof("SUB")-1;
 270         job_len = sizeof("JOB")-1;
 271
 272         for (u = unit_infos; u < unit_infos + c; u++) {
 273                 if (!output_show_job(u))
 274                         continue;
 275
 276                 active_len = MAX(active_len, strlen(u->active_state));
 277                 sub_len = MAX(sub_len, strlen(u->sub_state));
 278                 if (u->job_id != 0)
 279                         job_len = MAX(job_len, strlen(u->job_type));
 280         }
 281
 282         if (on_tty()) {
 283                 printf("%-25s %-6s %-*s %-*s %-*s", "UNIT", "LOAD",
 284                        active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB");
 285                 if (columns() >= 80+12 || arg_full)
 286                         printf(" %s\n", "DESCRIPTION");
 287                 else
 288                         printf("\n");
 289         }
 290
 291         for (u = unit_infos; u < unit_infos + c; u++) {
 292                 char *e;
 293                 int a = 0, b = 0;
 294                 const char *on_loaded, *off_loaded;
 295                 const char *on_active, *off_active;
 296
 297                 if (!output_show_job(u))
 298                         continue;
 299
 300                 if (!streq(u->load_state, "loaded") &&
 301                     !streq(u->load_state, "banned")) {
 302                         on_loaded = ansi_highlight(true);
 303                         off_loaded = ansi_highlight(false);
 304                 } else
 305                         on_loaded = off_loaded = "";
 306
 307                 if (streq(u->active_state, "failed")) {
 308                         on_active = ansi_highlight(true);
 309                         off_active = ansi_highlight(false);
 310                 } else
 311                         on_active = off_active = "";
 312
 313                 e = arg_full ? NULL : ellipsize(u->id, 25, 33);
 314
 315                 printf("%-25s %s%-6s%s %s%-*s %-*s%s%n",
 316                        e ? e : u->id,
 317                        on_loaded, u->load_state, off_loaded,
 318                        on_active, active_len, u->active_state,
 319                        sub_len, u->sub_state, off_active,
 320                        &a);
 321
 322                 free(e);
 323
 324                 a -= strlen(on_loaded) + strlen(off_loaded);
 325                 a -= strlen(on_active) + strlen(off_active);
 326
 327                 if (u->job_id != 0)
 328                         printf(" %-*s", job_len, u->job_type);
 329                 else
 330                         b = 1 + job_len;
 331
 332                 if (a + b + 1 < columns()) {
 333                         if (u->job_id == 0)
 334                                 printf(" %-*s", job_len, "");
 335
 336                         if (arg_full)
 337                                 printf(" %s", u->description);
 338                         else
 339                                 printf(" %.*s", columns() - a - b - 1, u->description);
 340                 }
 341
 342                 fputs("\n", stdout);
 343         }
 344
 345         if (on_tty()) {
 346                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
 347                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
 348                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
 349                        "JOB    = Pending job for the unit.\n");
 350
 351                 if (arg_all)
 352                         printf("\n%u units listed.\n", c);
 353                 else
 354                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", c);
 355         }
 356 }
 357
 358 static int list_units(DBusConnection *bus, char **args, unsigned n) {
 359         DBusMessage *m = NULL, *reply = NULL;
 360         DBusError error;
 361         int r;
 362         DBusMessageIter iter, sub, sub2;
 363         unsigned c = 0, n_units = 0;
 364         struct unit_info *unit_infos = NULL;
 365
 366         dbus_error_init(&error);
 367
 368         assert(bus);
 369
 370         if (!(m = dbus_message_new_method_call(
 371                               "org.freedesktop.systemd1",
 372                               "/org/freedesktop/systemd1",
 373                               "org.freedesktop.systemd1.Manager",
 374                               "ListUnits"))) {
 375                 log_error("Could not allocate message.");
 376                 return -ENOMEM;
 377         }
 378
 379         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 380                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 381                 r = -EIO;
 382                 goto finish;
 383         }
 384
 385         if (!dbus_message_iter_init(reply, &iter) ||
 386             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 387             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 388                 log_error("Failed to parse reply.");
 389                 r = -EIO;
 390                 goto finish;
 391         }
 392
 393         dbus_message_iter_recurse(&iter, &sub);
 394
 395         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 396                 struct unit_info *u;
 397
 398                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 399                         log_error("Failed to parse reply.");
 400                         r = -EIO;
 401                         goto finish;
 402                 }
 403
 404                 if (c >= n_units) {
 405                         struct unit_info *w;
 406
 407                         n_units = MAX(2*c, 16);
 408                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
 409
 410                         if (!w) {
 411                                 log_error("Failed to allocate unit array.");
 412                                 r = -ENOMEM;
 413                                 goto finish;
 414                         }
 415
 416                         unit_infos = w;
 417                 }
 418
 419                 u = unit_infos+c;
 420
 421                 dbus_message_iter_recurse(&sub, &sub2);
 422
 423                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
 424                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
 425                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
 426                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
 427                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
 428                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
 429                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
 430                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
 431                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
 432                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
 433                         log_error("Failed to parse reply.");
 434                         r = -EIO;
 435                         goto finish;
 436                 }
 437
 438                 dbus_message_iter_next(&sub);
 439                 c++;
 440         }
 441
 442         qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
 443         output_units_list(unit_infos, c);
 444
 445         r = 0;
 446
 447 finish:
 448         if (m)
 449                 dbus_message_unref(m);
 450
 451         if (reply)
 452                 dbus_message_unref(reply);
 453
 454         free(unit_infos);
 455
 456         dbus_error_free(&error);
 457
 458         return r;
 459 }
 460
 461 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
 462         static const char * const colors[] = {
 463                 "Requires",              "[color=\"black\"]",
 464                 "RequiresOverridable",   "[color=\"black\"]",
 465                 "Requisite",             "[color=\"darkblue\"]",
 466                 "RequisiteOverridable",  "[color=\"darkblue\"]",
 467                 "Wants",                 "[color=\"darkgrey\"]",
 468                 "Conflicts",             "[color=\"red\"]",
 469                 "ConflictedBy",          "[color=\"red\"]",
 470                 "After",                 "[color=\"green\"]"
 471         };
 472
 473         const char *c = NULL;
 474         unsigned i;
 475
 476         assert(name);
 477         assert(prop);
 478         assert(iter);
 479
 480         for (i = 0; i < ELEMENTSOF(colors); i += 2)
 481                 if (streq(colors[i], prop)) {
 482                         c = colors[i+1];
 483                         break;
 484                 }
 485
 486         if (!c)
 487                 return 0;
 488
 489         if (arg_dot != DOT_ALL)
 490                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
 491                         return 0;
 492
 493         switch (dbus_message_iter_get_arg_type(iter)) {
 494
 495         case DBUS_TYPE_ARRAY:
 496
 497                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
 498                         DBusMessageIter sub;
 499
 500                         dbus_message_iter_recurse(iter, &sub);
 501
 502                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 503                                 const char *s;
 504
 505                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
 506                                 dbus_message_iter_get_basic(&sub, &s);
 507                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
 508
 509                                 dbus_message_iter_next(&sub);
 510                         }
 511
 512                         return 0;
 513                 }
 514         }
 515
 516         return 0;
 517 }
 518
 519 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
 520         DBusMessage *m = NULL, *reply = NULL;
 521         const char *interface = "org.freedesktop.systemd1.Unit";
 522         int r;
 523         DBusError error;
 524         DBusMessageIter iter, sub, sub2, sub3;
 525
 526         assert(bus);
 527         assert(path);
 528
 529         dbus_error_init(&error);
 530
 531         if (!(m = dbus_message_new_method_call(
 532                               "org.freedesktop.systemd1",
 533                               path,
 534                               "org.freedesktop.DBus.Properties",
 535                               "GetAll"))) {
 536                 log_error("Could not allocate message.");
 537                 r = -ENOMEM;
 538                 goto finish;
 539         }
 540
 541         if (!dbus_message_append_args(m,
 542                                       DBUS_TYPE_STRING, &interface,
 543                                       DBUS_TYPE_INVALID)) {
 544                 log_error("Could not append arguments to message.");
 545                 r = -ENOMEM;
 546                 goto finish;
 547         }
 548
 549         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 550                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 551                 r = -EIO;
 552                 goto finish;
 553         }
 554
 555         if (!dbus_message_iter_init(reply, &iter) ||
 556             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 557             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
 558                 log_error("Failed to parse reply.");
 559                 r = -EIO;
 560                 goto finish;
 561         }
 562
 563         dbus_message_iter_recurse(&iter, &sub);
 564
 565         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 566                 const char *prop;
 567
 568                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
 569                         log_error("Failed to parse reply.");
 570                         r = -EIO;
 571                         goto finish;
 572                 }
 573
 574                 dbus_message_iter_recurse(&sub, &sub2);
 575
 576                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
 577                         log_error("Failed to parse reply.");
 578                         r = -EIO;
 579                         goto finish;
 580                 }
 581
 582                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
 583                         log_error("Failed to parse reply.");
 584                         r = -EIO;
 585                         goto finish;
 586                 }
 587
 588                 dbus_message_iter_recurse(&sub2, &sub3);
 589
 590                 if (dot_one_property(name, prop, &sub3)) {
 591                         log_error("Failed to parse reply.");
 592                         r = -EIO;
 593                         goto finish;
 594                 }
 595
 596                 dbus_message_iter_next(&sub);
 597         }
 598
 599         r = 0;
 600
 601 finish:
 602         if (m)
 603                 dbus_message_unref(m);
 604
 605         if (reply)
 606                 dbus_message_unref(reply);
 607
 608         dbus_error_free(&error);
 609
 610         return r;
 611 }
 612
 613 static int dot(DBusConnection *bus, char **args, unsigned n) {
 614         DBusMessage *m = NULL, *reply = NULL;
 615         DBusError error;
 616         int r;
 617         DBusMessageIter iter, sub, sub2;
 618
 619         dbus_error_init(&error);
 620
 621         assert(bus);
 622
 623         if (!(m = dbus_message_new_method_call(
 624                               "org.freedesktop.systemd1",
 625                               "/org/freedesktop/systemd1",
 626                               "org.freedesktop.systemd1.Manager",
 627                               "ListUnits"))) {
 628                 log_error("Could not allocate message.");
 629                 return -ENOMEM;
 630         }
 631
 632         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 633                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 634                 r = -EIO;
 635                 goto finish;
 636         }
 637
 638         if (!dbus_message_iter_init(reply, &iter) ||
 639             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 640             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 641                 log_error("Failed to parse reply.");
 642                 r = -EIO;
 643                 goto finish;
 644         }
 645
 646         printf("digraph systemd {\n");
 647
 648         dbus_message_iter_recurse(&iter, &sub);
 649         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 650                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
 651
 652                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 653                         log_error("Failed to parse reply.");
 654                         r = -EIO;
 655                         goto finish;
 656                 }
 657
 658                 dbus_message_iter_recurse(&sub, &sub2);
 659
 660                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
 661                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
 662                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
 663                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
 664                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
 665                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
 666                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
 667                         log_error("Failed to parse reply.");
 668                         r = -EIO;
 669                         goto finish;
 670                 }
 671
 672                 if ((r = dot_one(bus, id, unit_path)) < 0)
 673                         goto finish;
 674
 675                 /* printf("\t\"%s\";\n", id); */
 676                 dbus_message_iter_next(&sub);
 677         }
 678
 679         printf("}\n");
 680
 681         log_info("   Color legend: black     = Requires\n"
 682                  "                 dark blue = Requisite\n"
 683                  "                 dark grey = Wants\n"
 684                  "                 red       = Conflicts\n"
 685                  "                 green     = After\n");
 686
 687         if (isatty(fileno(stdout)))
 688                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
 689                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
 690
 691         r = 0;
 692
 693 finish:
 694         if (m)
 695                 dbus_message_unref(m);
 696
 697         if (reply)
 698                 dbus_message_unref(reply);
 699
 700         dbus_error_free(&error);
 701
 702         return r;
 703 }
 704
 705 static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
 706         DBusMessage *m = NULL, *reply = NULL;
 707         DBusError error;
 708         int r;
 709         DBusMessageIter iter, sub, sub2;
 710         unsigned k = 0;
 711
 712         dbus_error_init(&error);
 713
 714         assert(bus);
 715
 716         if (!(m = dbus_message_new_method_call(
 717                               "org.freedesktop.systemd1",
 718                               "/org/freedesktop/systemd1",
 719                               "org.freedesktop.systemd1.Manager",
 720                               "ListJobs"))) {
 721                 log_error("Could not allocate message.");
 722                 return -ENOMEM;
 723         }
 724
 725         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 726                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 727                 r = -EIO;
 728                 goto finish;
 729         }
 730
 731         if (!dbus_message_iter_init(reply, &iter) ||
 732             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 733             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 734                 log_error("Failed to parse reply.");
 735                 r = -EIO;
 736                 goto finish;
 737         }
 738
 739         dbus_message_iter_recurse(&iter, &sub);
 740
 741         if (isatty(STDOUT_FILENO))
 742                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
 743
 744         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 745                 const char *name, *type, *state, *job_path, *unit_path;
 746                 uint32_t id;
 747                 char *e;
 748
 749                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 750                         log_error("Failed to parse reply.");
 751                         r = -EIO;
 752                         goto finish;
 753                 }
 754
 755                 dbus_message_iter_recurse(&sub, &sub2);
 756
 757                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
 758                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
 759                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
 760                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
 761                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
 762                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
 763                         log_error("Failed to parse reply.");
 764                         r = -EIO;
 765                         goto finish;
 766                 }
 767
 768                 e = arg_full ? NULL : ellipsize(name, 25, 33);
 769                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
 770                 free(e);
 771
 772                 k++;
 773
 774                 dbus_message_iter_next(&sub);
 775         }
 776
 777         if (isatty(STDOUT_FILENO))
 778                 printf("\n%u jobs listed.\n", k);
 779
 780         r = 0;
 781
 782 finish:
 783         if (m)
 784                 dbus_message_unref(m);
 785
 786         if (reply)
 787                 dbus_message_unref(reply);
 788
 789         dbus_error_free(&error);
 790
 791         return r;
 792 }
 793
 794 static int load_unit(DBusConnection *bus, char **args, unsigned n) {
 795         DBusMessage *m = NULL, *reply = NULL;
 796         DBusError error;
 797         int r;
 798         unsigned i;
 799
 800         dbus_error_init(&error);
 801
 802         assert(bus);
 803         assert(args);
 804
 805         for (i = 1; i < n; i++) {
 806
 807                 if (!(m = dbus_message_new_method_call(
 808                                       "org.freedesktop.systemd1",
 809                                       "/org/freedesktop/systemd1",
 810                                       "org.freedesktop.systemd1.Manager",
 811                                       "LoadUnit"))) {
 812                         log_error("Could not allocate message.");
 813                         r = -ENOMEM;
 814                         goto finish;
 815                 }
 816
 817                 if (!dbus_message_append_args(m,
 818                                               DBUS_TYPE_STRING, &args[i],
 819                                               DBUS_TYPE_INVALID)) {
 820                         log_error("Could not append arguments to message.");
 821                         r = -ENOMEM;
 822                         goto finish;
 823                 }
 824
 825                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 826                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 827                         r = -EIO;
 828                         goto finish;
 829                 }
 830
 831                 dbus_message_unref(m);
 832                 dbus_message_unref(reply);
 833
 834                 m = reply = NULL;
 835         }
 836
 837         r = 0;
 838
 839 finish:
 840         if (m)
 841                 dbus_message_unref(m);
 842
 843         if (reply)
 844                 dbus_message_unref(reply);
 845
 846         dbus_error_free(&error);
 847
 848         return r;
 849 }
 850
 851 static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
 852         DBusMessage *m = NULL, *reply = NULL;
 853         DBusError error;
 854         int r;
 855         unsigned i;
 856
 857         dbus_error_init(&error);
 858
 859         assert(bus);
 860         assert(args);
 861
 862         if (n <= 1)
 863                 return daemon_reload(bus, args, n);
 864
 865         for (i = 1; i < n; i++) {
 866                 unsigned id;
 867                 const char *path;
 868
 869                 if (!(m = dbus_message_new_method_call(
 870                                       "org.freedesktop.systemd1",
 871                                       "/org/freedesktop/systemd1",
 872                                       "org.freedesktop.systemd1.Manager",
 873                                       "GetJob"))) {
 874                         log_error("Could not allocate message.");
 875                         r = -ENOMEM;
 876                         goto finish;
 877                 }
 878
 879                 if ((r = safe_atou(args[i], &id)) < 0) {
 880                         log_error("Failed to parse job id: %s", strerror(-r));
 881                         goto finish;
 882                 }
 883
 884                 assert_cc(sizeof(uint32_t) == sizeof(id));
 885                 if (!dbus_message_append_args(m,
 886                                               DBUS_TYPE_UINT32, &id,
 887                                               DBUS_TYPE_INVALID)) {
 888                         log_error("Could not append arguments to message.");
 889                         r = -ENOMEM;
 890                         goto finish;
 891                 }
 892
 893                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 894                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 895                         r = -EIO;
 896                         goto finish;
 897                 }
 898
 899                 if (!dbus_message_get_args(reply, &error,
 900                                            DBUS_TYPE_OBJECT_PATH, &path,
 901                                            DBUS_TYPE_INVALID)) {
 902                         log_error("Failed to parse reply: %s", bus_error_message(&error));
 903                         r = -EIO;
 904                         goto finish;
 905                 }
 906
 907                 dbus_message_unref(m);
 908                 if (!(m = dbus_message_new_method_call(
 909                                       "org.freedesktop.systemd1",
 910                                       path,
 911                                       "org.freedesktop.systemd1.Job",
 912                                       "Cancel"))) {
 913                         log_error("Could not allocate message.");
 914                         r = -ENOMEM;
 915                         goto finish;
 916                 }
 917
 918                 dbus_message_unref(reply);
 919                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 920                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 921                         r = -EIO;
 922                         goto finish;
 923                 }
 924
 925                 dbus_message_unref(m);
 926                 dbus_message_unref(reply);
 927                 m = reply = NULL;
 928         }
 929
 930         r = 0;
 931
 932 finish:
 933         if (m)
 934                 dbus_message_unref(m);
 935
 936         if (reply)
 937                 dbus_message_unref(reply);
 938
 939         dbus_error_free(&error);
 940
 941         return r;
 942 }
 943
 944 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
 945         DBusMessage *m = NULL, *reply = NULL;
 946         dbus_bool_t b = FALSE;
 947         DBusMessageIter iter, sub;
 948         const char
 949                 *interface = "org.freedesktop.systemd1.Unit",
 950                 *property = "NeedDaemonReload",
 951                 *path;
 952
 953         /* We ignore all errors here, since this is used to show a warning only */
 954
 955         if (!(m = dbus_message_new_method_call(
 956                               "org.freedesktop.systemd1",
 957                               "/org/freedesktop/systemd1",
 958                               "org.freedesktop.systemd1.Manager",
 959                               "GetUnit")))
 960                 goto finish;
 961
 962         if (!dbus_message_append_args(m,
 963                                       DBUS_TYPE_STRING, &unit,
 964                                       DBUS_TYPE_INVALID))
 965                 goto finish;
 966
 967         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
 968                 goto finish;
 969
 970         if (!dbus_message_get_args(reply, NULL,
 971                                    DBUS_TYPE_OBJECT_PATH, &path,
 972                                    DBUS_TYPE_INVALID))
 973                 goto finish;
 974
 975         dbus_message_unref(m);
 976         if (!(m = dbus_message_new_method_call(
 977                               "org.freedesktop.systemd1",
 978                               path,
 979                               "org.freedesktop.DBus.Properties",
 980                               "Get")))
 981                 goto finish;
 982
 983         if (!dbus_message_append_args(m,
 984                                       DBUS_TYPE_STRING, &interface,
 985                                       DBUS_TYPE_STRING, &property,
 986                                       DBUS_TYPE_INVALID)) {
 987                 goto finish;
 988         }
 989
 990         dbus_message_unref(reply);
 991         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
 992                 goto finish;
 993
 994         if (!dbus_message_iter_init(reply, &iter) ||
 995             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
 996                 goto finish;
 997
 998         dbus_message_iter_recurse(&iter, &sub);
 999
1000         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1001                 goto finish;
1002
1003         dbus_message_iter_get_basic(&sub, &b);
1004
1005 finish:
1006         if (m)
1007                 dbus_message_unref(m);
1008
1009         if (reply)
1010                 dbus_message_unref(reply);
1011
1012         return b;
1013 }
1014
1015 typedef struct WaitData {
1016         Set *set;
1017         bool failed;
1018 } WaitData;
1019
1020 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1021         DBusError error;
1022         WaitData *d = data;
1023
1024         assert(connection);
1025         assert(message);
1026         assert(d);
1027
1028         dbus_error_init(&error);
1029
1030         log_debug("Got D-Bus request: %s.%s() on %s",
1031                   dbus_message_get_interface(message),
1032                   dbus_message_get_member(message),
1033                   dbus_message_get_path(message));
1034
1035         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1036                 log_error("Warning! D-Bus connection terminated.");
1037                 dbus_connection_close(connection);
1038
1039         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1040                 uint32_t id;
1041                 const char *path;
1042                 dbus_bool_t success = true;
1043
1044                 if (!dbus_message_get_args(message, &error,
1045                                            DBUS_TYPE_UINT32, &id,
1046                                            DBUS_TYPE_OBJECT_PATH, &path,
1047                                            DBUS_TYPE_BOOLEAN, &success,
1048                                            DBUS_TYPE_INVALID))
1049                         log_error("Failed to parse message: %s", bus_error_message(&error));
1050                 else {
1051                         char *p;
1052
1053                         if ((p = set_remove(d->set, (char*) path)))
1054                                 free(p);
1055
1056                         if (!success)
1057                                 d->failed = true;
1058                 }
1059         }
1060
1061         dbus_error_free(&error);
1062         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1063 }
1064
1065 static int enable_wait_for_jobs(DBusConnection *bus) {
1066         DBusError error;
1067
1068         assert(bus);
1069
1070         if (private_bus)
1071                 return 0;
1072
1073         dbus_error_init(&error);
1074         dbus_bus_add_match(bus,
1075                            "type='signal',"
1076                            "sender='org.freedesktop.systemd1',"
1077                            "interface='org.freedesktop.systemd1.Manager',"
1078                            "member='JobRemoved',"
1079                            "path='/org/freedesktop/systemd1'",
1080                            &error);
1081
1082         if (dbus_error_is_set(&error)) {
1083                 log_error("Failed to add match: %s", bus_error_message(&error));
1084                 dbus_error_free(&error);
1085                 return -EIO;
1086         }
1087
1088         /* This is slightly dirty, since we don't undo the match registrations. */
1089         return 0;
1090 }
1091
1092 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1093         int r;
1094         WaitData d;
1095
1096         assert(bus);
1097         assert(s);
1098
1099         zero(d);
1100         d.set = s;
1101         d.failed = false;
1102
1103         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1104                 log_error("Failed to add filter.");
1105                 r = -ENOMEM;
1106                 goto finish;
1107         }
1108
1109         while (!set_isempty(s) &&
1110                dbus_connection_read_write_dispatch(bus, -1))
1111                 ;
1112
1113         if (!arg_quiet && d.failed)
1114                 log_error("Job failed, see system logs for details.");
1115
1116         r = d.failed ? -EIO : 0;
1117
1118 finish:
1119         /* This is slightly dirty, since we don't undo the filter registration. */
1120
1121         return r;
1122 }
1123
1124 static int start_unit_one(
1125                 DBusConnection *bus,
1126                 const char *method,
1127                 const char *name,
1128                 const char *mode,
1129                 DBusError *error,
1130                 Set *s) {
1131
1132         DBusMessage *m = NULL, *reply = NULL;
1133         const char *path;
1134         int r;
1135
1136         assert(bus);
1137         assert(method);
1138         assert(name);
1139         assert(mode);
1140         assert(error);
1141         assert(arg_no_block || s);
1142
1143         if (!(m = dbus_message_new_method_call(
1144                               "org.freedesktop.systemd1",
1145                               "/org/freedesktop/systemd1",
1146                               "org.freedesktop.systemd1.Manager",
1147                               method))) {
1148                 log_error("Could not allocate message.");
1149                 r = -ENOMEM;
1150                 goto finish;
1151         }
1152
1153         if (!dbus_message_append_args(m,
1154                                       DBUS_TYPE_STRING, &name,
1155                                       DBUS_TYPE_STRING, &mode,
1156                                       DBUS_TYPE_INVALID)) {
1157                 log_error("Could not append arguments to message.");
1158                 r = -ENOMEM;
1159                 goto finish;
1160         }
1161
1162         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1163
1164                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1165                         /* There's always a fallback possible for
1166                          * legacy actions. */
1167                         r = -EADDRNOTAVAIL;
1168                         goto finish;
1169                 }
1170
1171                 log_error("Failed to issue method call: %s", bus_error_message(error));
1172                 r = -EIO;
1173                 goto finish;
1174         }
1175
1176         if (!dbus_message_get_args(reply, error,
1177                                    DBUS_TYPE_OBJECT_PATH, &path,
1178                                    DBUS_TYPE_INVALID)) {
1179                 log_error("Failed to parse reply: %s", bus_error_message(error));
1180                 r = -EIO;
1181                 goto finish;
1182         }
1183
1184         if (need_daemon_reload(bus, name))
1185                 log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1186                             arg_session ? "--session" : "--system");
1187
1188         if (!arg_no_block) {
1189                 char *p;
1190
1191                 if (!(p = strdup(path))) {
1192                         log_error("Failed to duplicate path.");
1193                         r = -ENOMEM;
1194                         goto finish;
1195                 }
1196
1197                 if ((r = set_put(s, p)) < 0) {
1198                         free(p);
1199                         log_error("Failed to add path to set.");
1200                         goto finish;
1201                 }
1202         }
1203
1204         r = 0;
1205
1206 finish:
1207         if (m)
1208                 dbus_message_unref(m);
1209
1210         if (reply)
1211                 dbus_message_unref(reply);
1212
1213         return r;
1214 }
1215
1216 static enum action verb_to_action(const char *verb) {
1217         if (streq(verb, "halt"))
1218                 return ACTION_HALT;
1219         else if (streq(verb, "poweroff"))
1220                 return ACTION_POWEROFF;
1221         else if (streq(verb, "reboot"))
1222                 return ACTION_REBOOT;
1223         else if (streq(verb, "rescue"))
1224                 return ACTION_RESCUE;
1225         else if (streq(verb, "emergency"))
1226                 return ACTION_EMERGENCY;
1227         else if (streq(verb, "default"))
1228                 return ACTION_DEFAULT;
1229         else
1230                 return ACTION_INVALID;
1231 }
1232
1233 static int start_unit(DBusConnection *bus, char **args, unsigned n) {
1234
1235         static const char * const table[_ACTION_MAX] = {
1236                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1237                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1238                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1239                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1240                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1241                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1242                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1243                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1244                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1245                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET
1246         };
1247
1248         int r, ret = 0;
1249         unsigned i;
1250         const char *method, *mode, *one_name;
1251         Set *s = NULL;
1252         DBusError error;
1253
1254         dbus_error_init(&error);
1255
1256         assert(bus);
1257
1258         if (arg_action == ACTION_SYSTEMCTL) {
1259                 method =
1260                         streq(args[0], "stop")                  ? "StopUnit" :
1261                         streq(args[0], "reload")                ? "ReloadUnit" :
1262                         streq(args[0], "restart")               ? "RestartUnit" :
1263                         streq(args[0], "try-restart")           ||
1264                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1265                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1266                         streq(args[0], "reload-or-try-restart") ||
1267                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1268                                                                   "StartUnit";
1269
1270                 mode =
1271                         (streq(args[0], "isolate") ||
1272                          streq(args[0], "rescue")  ||
1273                          streq(args[0], "emergency")) ? "isolate" :
1274                                              arg_fail ? "fail" :
1275                                                         "replace";
1276
1277                 one_name = table[verb_to_action(args[0])];
1278
1279         } else {
1280                 assert(arg_action < ELEMENTSOF(table));
1281                 assert(table[arg_action]);
1282
1283                 method = "StartUnit";
1284
1285                 mode = (arg_action == ACTION_EMERGENCY ||
1286                         arg_action == ACTION_RESCUE ||
1287                         arg_action == ACTION_RUNLEVEL2 ||
1288                         arg_action == ACTION_RUNLEVEL3 ||
1289                         arg_action == ACTION_RUNLEVEL4 ||
1290                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1291
1292                 one_name = table[arg_action];
1293         }
1294
1295         if (!arg_no_block) {
1296                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1297                         log_error("Could not watch jobs: %s", strerror(-ret));
1298                         goto finish;
1299                 }
1300
1301                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1302                         log_error("Failed to allocate set.");
1303                         ret = -ENOMEM;
1304                         goto finish;
1305                 }
1306         }
1307
1308         if (one_name) {
1309                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1310                         goto finish;
1311         } else {
1312                 for (i = 1; i < n; i++)
1313                         if ((r = start_unit_one(bus, method, args[i], mode, &error, s)) != 0) {
1314                                 ret = translate_bus_error_to_exit_status(r, &error);
1315                                 dbus_error_free(&error);
1316                         }
1317         }
1318
1319         if (!arg_no_block)
1320                 if ((r = wait_for_jobs(bus, s)) < 0) {
1321                         ret = r;
1322                         goto finish;
1323                 }
1324
1325 finish:
1326         if (s)
1327                 set_free_free(s);
1328
1329         dbus_error_free(&error);
1330
1331         return ret;
1332 }
1333
1334 static int start_special(DBusConnection *bus, char **args, unsigned n) {
1335         int r;
1336
1337         assert(bus);
1338         assert(args);
1339
1340         r = start_unit(bus, args, n);
1341
1342         if (r >= 0)
1343                 warn_wall(verb_to_action(args[0]));
1344
1345         return r;
1346 }
1347
1348 static int check_unit(DBusConnection *bus, char **args, unsigned n) {
1349         DBusMessage *m = NULL, *reply = NULL;
1350         const char
1351                 *interface = "org.freedesktop.systemd1.Unit",
1352                 *property = "ActiveState";
1353         int r = 3; /* According to LSB: "program is not running" */
1354         DBusError error;
1355         unsigned i;
1356
1357         assert(bus);
1358         assert(args);
1359
1360         dbus_error_init(&error);
1361
1362         for (i = 1; i < n; i++) {
1363                 const char *path = NULL;
1364                 const char *state;
1365                 DBusMessageIter iter, sub;
1366
1367                 if (!(m = dbus_message_new_method_call(
1368                                       "org.freedesktop.systemd1",
1369                                       "/org/freedesktop/systemd1",
1370                                       "org.freedesktop.systemd1.Manager",
1371                                       "GetUnit"))) {
1372                         log_error("Could not allocate message.");
1373                         r = -ENOMEM;
1374                         goto finish;
1375                 }
1376
1377                 if (!dbus_message_append_args(m,
1378                                               DBUS_TYPE_STRING, &args[i],
1379                                               DBUS_TYPE_INVALID)) {
1380                         log_error("Could not append arguments to message.");
1381                         r = -ENOMEM;
1382                         goto finish;
1383                 }
1384
1385                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1386
1387                         /* Hmm, cannot figure out anything about this unit... */
1388                         if (!arg_quiet)
1389                                 puts("unknown");
1390
1391                         dbus_error_free(&error);
1392                         continue;
1393                 }
1394
1395                 if (!dbus_message_get_args(reply, &error,
1396                                            DBUS_TYPE_OBJECT_PATH, &path,
1397                                            DBUS_TYPE_INVALID)) {
1398                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1399                         r = -EIO;
1400                         goto finish;
1401                 }
1402
1403                 dbus_message_unref(m);
1404                 if (!(m = dbus_message_new_method_call(
1405                                       "org.freedesktop.systemd1",
1406                                       path,
1407                                       "org.freedesktop.DBus.Properties",
1408                                       "Get"))) {
1409                         log_error("Could not allocate message.");
1410                         r = -ENOMEM;
1411                         goto finish;
1412                 }
1413
1414                 if (!dbus_message_append_args(m,
1415                                               DBUS_TYPE_STRING, &interface,
1416                                               DBUS_TYPE_STRING, &property,
1417                                               DBUS_TYPE_INVALID)) {
1418                         log_error("Could not append arguments to message.");
1419                         r = -ENOMEM;
1420                         goto finish;
1421                 }
1422
1423                 dbus_message_unref(reply);
1424                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1425                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1426                         r = -EIO;
1427                         goto finish;
1428                 }
1429
1430                 if (!dbus_message_iter_init(reply, &iter) ||
1431                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1432                         log_error("Failed to parse reply.");
1433                         r = -EIO;
1434                         goto finish;
1435                 }
1436
1437                 dbus_message_iter_recurse(&iter, &sub);
1438
1439                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1440                         log_error("Failed to parse reply.");
1441                         r = -EIO;
1442                         goto finish;
1443                 }
1444
1445                 dbus_message_iter_get_basic(&sub, &state);
1446
1447                 if (!arg_quiet)
1448                         puts(state);
1449
1450                 if (streq(state, "active") || streq(state, "reloading"))
1451                         r = 0;
1452
1453                 dbus_message_unref(m);
1454                 dbus_message_unref(reply);
1455                 m = reply = NULL;
1456         }
1457
1458 finish:
1459         if (m)
1460                 dbus_message_unref(m);
1461
1462         if (reply)
1463                 dbus_message_unref(reply);
1464
1465         dbus_error_free(&error);
1466
1467         return r;
1468 }
1469
1470 typedef struct ExecStatusInfo {
1471         char *path;
1472         char **argv;
1473
1474         bool ignore;
1475
1476         usec_t start_timestamp;
1477         usec_t exit_timestamp;
1478         pid_t pid;
1479         int code;
1480         int status;
1481
1482         LIST_FIELDS(struct ExecStatusInfo, exec);
1483 } ExecStatusInfo;
1484
1485 static void exec_status_info_free(ExecStatusInfo *i) {
1486         assert(i);
1487
1488         free(i->path);
1489         strv_free(i->argv);
1490         free(i);
1491 }
1492
1493 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1494         uint64_t start_timestamp, exit_timestamp;
1495         DBusMessageIter sub2, sub3;
1496         const char*path;
1497         unsigned n;
1498         uint32_t pid;
1499         int32_t code, status;
1500         dbus_bool_t ignore;
1501
1502         assert(i);
1503         assert(i);
1504
1505         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1506                 return -EIO;
1507
1508         dbus_message_iter_recurse(sub, &sub2);
1509
1510         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1511                 return -EIO;
1512
1513         if (!(i->path = strdup(path)))
1514                 return -ENOMEM;
1515
1516         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1517             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1518                 return -EIO;
1519
1520         n = 0;
1521         dbus_message_iter_recurse(&sub2, &sub3);
1522         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1523                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1524                 dbus_message_iter_next(&sub3);
1525                 n++;
1526         }
1527
1528
1529         if (!(i->argv = new0(char*, n+1)))
1530                 return -ENOMEM;
1531
1532         n = 0;
1533         dbus_message_iter_recurse(&sub2, &sub3);
1534         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1535                 const char *s;
1536
1537                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1538                 dbus_message_iter_get_basic(&sub3, &s);
1539                 dbus_message_iter_next(&sub3);
1540
1541                 if (!(i->argv[n++] = strdup(s)))
1542                         return -ENOMEM;
1543         }
1544
1545         if (!dbus_message_iter_next(&sub2) ||
1546             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1547             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1548             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1549             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1550             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1551             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1552                 return -EIO;
1553
1554         i->ignore = ignore;
1555         i->start_timestamp = (usec_t) start_timestamp;
1556         i->exit_timestamp = (usec_t) exit_timestamp;
1557         i->pid = (pid_t) pid;
1558         i->code = code;
1559         i->status = status;
1560
1561         return 0;
1562 }
1563
1564 typedef struct UnitStatusInfo {
1565         const char *id;
1566         const char *load_state;
1567         const char *active_state;
1568         const char *sub_state;
1569
1570         const char *description;
1571
1572         const char *path;
1573         const char *default_control_group;
1574
1575         usec_t inactive_exit_timestamp;
1576         usec_t active_enter_timestamp;
1577         usec_t active_exit_timestamp;
1578         usec_t inactive_enter_timestamp;
1579
1580         bool need_daemon_reload;
1581
1582         /* Service */
1583         pid_t main_pid;
1584         pid_t control_pid;
1585         const char *status_text;
1586         bool running:1;
1587 #ifdef HAVE_SYSV_COMPAT
1588         bool is_sysv:1;
1589 #endif
1590
1591         usec_t start_timestamp;
1592         usec_t exit_timestamp;
1593
1594         int exit_code, exit_status;
1595
1596         /* Socket */
1597         unsigned n_accepted;
1598         unsigned n_connections;
1599         bool accept;
1600
1601         /* Device */
1602         const char *sysfs_path;
1603
1604         /* Mount, Automount */
1605         const char *where;
1606
1607         /* Swap */
1608         const char *what;
1609
1610         LIST_HEAD(ExecStatusInfo, exec);
1611 } UnitStatusInfo;
1612
1613 static void print_status_info(UnitStatusInfo *i) {
1614         ExecStatusInfo *p;
1615         const char *on, *off, *ss;
1616         usec_t timestamp;
1617         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
1618         char since2[FORMAT_TIMESTAMP_MAX], *s2;
1619
1620         assert(i);
1621
1622         /* This shows pretty information about a unit. See
1623          * print_property() for a low-level property printer */
1624
1625         printf("%s", strna(i->id));
1626
1627         if (i->description && !streq_ptr(i->id, i->description))
1628                 printf(" - %s", i->description);
1629
1630         printf("\n");
1631
1632         if (streq_ptr(i->load_state, "failed") ||
1633             streq_ptr(i->load_state, "banned")) {
1634                 on = ansi_highlight(true);
1635                 off = ansi_highlight(false);
1636         } else
1637                 on = off = "";
1638
1639         if (i->path)
1640                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
1641         else
1642                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
1643
1644         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1645
1646         if (streq_ptr(i->active_state, "failed")) {
1647                 on = ansi_highlight(true);
1648                 off = ansi_highlight(false);
1649         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1650                 on = ansi_highlight_green(true);
1651                 off = ansi_highlight_green(false);
1652         } else
1653                 on = off = "";
1654
1655         if (ss)
1656                 printf("\t  Active: %s%s (%s)%s",
1657                        on,
1658                        strna(i->active_state),
1659                        ss,
1660                        off);
1661         else
1662                 printf("\t  Active: %s%s%s",
1663                        on,
1664                        strna(i->active_state),
1665                        off);
1666
1667         timestamp = (streq_ptr(i->active_state, "active")      ||
1668                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
1669                     (streq_ptr(i->active_state, "inactive")    ||
1670                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
1671                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
1672                                                                   i->active_exit_timestamp;
1673
1674         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
1675         s2 = format_timestamp(since2, sizeof(since2), timestamp);
1676
1677         if (s1)
1678                 printf(" since [%s; %s]\n", s2, s1);
1679         else if (s2)
1680                 printf(" since [%s]\n", s2);
1681         else
1682                 printf("\n");
1683
1684         if (i->sysfs_path)
1685                 printf("\t  Device: %s\n", i->sysfs_path);
1686         else if (i->where)
1687                 printf("\t   Where: %s\n", i->where);
1688         else if (i->what)
1689                 printf("\t    What: %s\n", i->what);
1690
1691         if (i->accept)
1692                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1693
1694         LIST_FOREACH(exec, p, i->exec) {
1695                 char *t;
1696
1697                 /* Only show exited processes here */
1698                 if (p->code == 0)
1699                         continue;
1700
1701                 t = strv_join(p->argv, " ");
1702                 printf("\t Process: %u (%s, code=%s, ", p->pid, strna(t), sigchld_code_to_string(p->code));
1703                 free(t);
1704
1705                 if (p->code == CLD_EXITED) {
1706                         const char *c;
1707
1708                         printf("status=%i", p->status);
1709
1710 #ifdef HAVE_SYSV_COMPAT
1711                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1712 #else
1713                         if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD)))
1714 #endif
1715                                 printf("/%s", c);
1716
1717                 } else
1718                         printf("signal=%s", signal_to_string(p->status));
1719                 printf(")\n");
1720
1721                 if (i->main_pid == p->pid &&
1722                     i->start_timestamp == p->start_timestamp &&
1723                     i->exit_timestamp == p->start_timestamp)
1724                         /* Let's not show this twice */
1725                         i->main_pid = 0;
1726
1727                 if (p->pid == i->control_pid)
1728                         i->control_pid = 0;
1729         }
1730
1731         if (i->main_pid > 0 || i->control_pid > 0) {
1732                 printf("\t");
1733
1734                 if (i->main_pid > 0) {
1735                         printf("Main PID: %u", (unsigned) i->main_pid);
1736
1737                         if (i->running) {
1738                                 char *t = NULL;
1739                                 get_process_name(i->main_pid, &t);
1740                                 if (t) {
1741                                         printf(" (%s)", t);
1742                                         free(t);
1743                                 }
1744                         } else if (i->exit_code > 0) {
1745                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
1746
1747                                 if (i->exit_code == CLD_EXITED) {
1748                                         const char *c;
1749
1750                                         printf("status=%i", i->exit_status);
1751
1752 #ifdef HAVE_SYSV_COMPAT
1753                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1754 #else
1755                                         if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD)))
1756 #endif
1757                                                 printf("/%s", c);
1758
1759                                 } else
1760                                         printf("signal=%s", signal_to_string(i->exit_status));
1761                                 printf(")");
1762                         }
1763                 }
1764
1765                 if (i->main_pid > 0 && i->control_pid > 0)
1766                         printf(";");
1767
1768                 if (i->control_pid > 0) {
1769                         char *t = NULL;
1770
1771                         printf(" Control: %u", (unsigned) i->control_pid);
1772
1773                         get_process_name(i->control_pid, &t);
1774                         if (t) {
1775                                 printf(" (%s)", t);
1776                                 free(t);
1777                         }
1778                 }
1779
1780                 printf("\n");
1781         }
1782
1783         if (i->status_text)
1784                 printf("\t  Status: \"%s\"\n", i->status_text);
1785
1786         if (i->default_control_group) {
1787                 unsigned c;
1788
1789                 printf("\t  CGroup: %s\n", i->default_control_group);
1790
1791                 if ((c = columns()) > 18)
1792                         c -= 18;
1793                 else
1794                         c = 0;
1795
1796                 show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
1797         }
1798
1799         if (i->need_daemon_reload)
1800                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
1801                        ansi_highlight(true),
1802                        ansi_highlight(false),
1803                        arg_session ? "--session" : "--system");
1804 }
1805
1806 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
1807
1808         switch (dbus_message_iter_get_arg_type(iter)) {
1809
1810         case DBUS_TYPE_STRING: {
1811                 const char *s;
1812
1813                 dbus_message_iter_get_basic(iter, &s);
1814
1815                 if (s[0]) {
1816                         if (streq(name, "Id"))
1817                                 i->id = s;
1818                         else if (streq(name, "LoadState"))
1819                                 i->load_state = s;
1820                         else if (streq(name, "ActiveState"))
1821                                 i->active_state = s;
1822                         else if (streq(name, "SubState"))
1823                                 i->sub_state = s;
1824                         else if (streq(name, "Description"))
1825                                 i->description = s;
1826                         else if (streq(name, "FragmentPath"))
1827                                 i->path = s;
1828 #ifdef HAVE_SYSV_COMPAT
1829                         else if (streq(name, "SysVPath")) {
1830                                 i->is_sysv = true;
1831                                 i->path = s;
1832                         }
1833 #endif
1834                         else if (streq(name, "DefaultControlGroup"))
1835                                 i->default_control_group = s;
1836                         else if (streq(name, "StatusText"))
1837                                 i->status_text = s;
1838                         else if (streq(name, "SysFSPath"))
1839                                 i->sysfs_path = s;
1840                         else if (streq(name, "Where"))
1841                                 i->where = s;
1842                         else if (streq(name, "What"))
1843                                 i->what = s;
1844                 }
1845
1846                 break;
1847         }
1848
1849         case DBUS_TYPE_BOOLEAN: {
1850                 dbus_bool_t b;
1851
1852                 dbus_message_iter_get_basic(iter, &b);
1853
1854                 if (streq(name, "Accept"))
1855                         i->accept = b;
1856                 else if (streq(name, "NeedDaemonReload"))
1857                         i->need_daemon_reload = b;
1858
1859                 break;
1860         }
1861
1862         case DBUS_TYPE_UINT32: {
1863                 uint32_t u;
1864
1865                 dbus_message_iter_get_basic(iter, &u);
1866
1867                 if (streq(name, "MainPID")) {
1868                         if (u > 0) {
1869                                 i->main_pid = (pid_t) u;
1870                                 i->running = true;
1871                         }
1872                 } else if (streq(name, "ControlPID"))
1873                         i->control_pid = (pid_t) u;
1874                 else if (streq(name, "ExecMainPID")) {
1875                         if (u > 0)
1876                                 i->main_pid = (pid_t) u;
1877                 } else if (streq(name, "NAccepted"))
1878                         i->n_accepted = u;
1879                 else if (streq(name, "NConnections"))
1880                         i->n_connections = u;
1881
1882                 break;
1883         }
1884
1885         case DBUS_TYPE_INT32: {
1886                 int32_t j;
1887
1888                 dbus_message_iter_get_basic(iter, &j);
1889
1890                 if (streq(name, "ExecMainCode"))
1891                         i->exit_code = (int) j;
1892                 else if (streq(name, "ExecMainStatus"))
1893                         i->exit_status = (int) j;
1894
1895                 break;
1896         }
1897
1898         case DBUS_TYPE_UINT64: {
1899                 uint64_t u;
1900
1901                 dbus_message_iter_get_basic(iter, &u);
1902
1903                 if (streq(name, "ExecMainStartTimestamp"))
1904                         i->start_timestamp = (usec_t) u;
1905                 else if (streq(name, "ExecMainExitTimestamp"))
1906                         i->exit_timestamp = (usec_t) u;
1907                 else if (streq(name, "ActiveEnterTimestamp"))
1908                         i->active_enter_timestamp = (usec_t) u;
1909                 else if (streq(name, "InactiveEnterTimestamp"))
1910                         i->inactive_enter_timestamp = (usec_t) u;
1911                 else if (streq(name, "InactiveExitTimestamp"))
1912                         i->inactive_exit_timestamp = (usec_t) u;
1913                 else if (streq(name, "ActiveExitTimestamp"))
1914                         i->active_exit_timestamp = (usec_t) u;
1915
1916                 break;
1917         }
1918
1919         case DBUS_TYPE_ARRAY: {
1920
1921                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
1922                     startswith(name, "Exec")) {
1923                         DBusMessageIter sub;
1924
1925                         dbus_message_iter_recurse(iter, &sub);
1926                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1927                                 ExecStatusInfo *info;
1928                                 int r;
1929
1930                                 if (!(info = new0(ExecStatusInfo, 1)))
1931                                         return -ENOMEM;
1932
1933                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
1934                                         free(info);
1935                                         return r;
1936                                 }
1937
1938                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
1939
1940                                 dbus_message_iter_next(&sub);
1941                         }
1942                 }
1943
1944                 break;
1945         }
1946         }
1947
1948         return 0;
1949 }
1950
1951 static int print_property(const char *name, DBusMessageIter *iter) {
1952         assert(name);
1953         assert(iter);
1954
1955         /* This is a low-level property printer, see
1956          * print_status_info() for the nicer output */
1957
1958         if (arg_property && !strv_find(arg_property, name))
1959                 return 0;
1960
1961         switch (dbus_message_iter_get_arg_type(iter)) {
1962
1963         case DBUS_TYPE_STRING: {
1964                 const char *s;
1965                 dbus_message_iter_get_basic(iter, &s);
1966
1967                 if (arg_all || s[0])
1968                         printf("%s=%s\n", name, s);
1969
1970                 return 0;
1971         }
1972
1973         case DBUS_TYPE_BOOLEAN: {
1974                 dbus_bool_t b;
1975                 dbus_message_iter_get_basic(iter, &b);
1976                 printf("%s=%s\n", name, yes_no(b));
1977
1978                 return 0;
1979         }
1980
1981         case DBUS_TYPE_UINT64: {
1982                 uint64_t u;
1983                 dbus_message_iter_get_basic(iter, &u);
1984
1985                 /* Yes, heuristics! But we can change this check
1986                  * should it turn out to not be sufficient */
1987
1988                 if (strstr(name, "Timestamp")) {
1989                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
1990
1991                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
1992                                 printf("%s=%s\n", name, strempty(t));
1993                 } else if (strstr(name, "USec")) {
1994                         char timespan[FORMAT_TIMESPAN_MAX];
1995
1996                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
1997                 } else
1998                         printf("%s=%llu\n", name, (unsigned long long) u);
1999
2000                 return 0;
2001         }
2002
2003         case DBUS_TYPE_UINT32: {
2004                 uint32_t u;
2005                 dbus_message_iter_get_basic(iter, &u);
2006
2007                 if (strstr(name, "UMask") || strstr(name, "Mode"))
2008                         printf("%s=%04o\n", name, u);
2009                 else
2010                         printf("%s=%u\n", name, (unsigned) u);
2011
2012                 return 0;
2013         }
2014
2015         case DBUS_TYPE_INT32: {
2016                 int32_t i;
2017                 dbus_message_iter_get_basic(iter, &i);
2018
2019                 printf("%s=%i\n", name, (int) i);
2020                 return 0;
2021         }
2022
2023         case DBUS_TYPE_DOUBLE: {
2024                 double d;
2025                 dbus_message_iter_get_basic(iter, &d);
2026
2027                 printf("%s=%g\n", name, d);
2028                 return 0;
2029         }
2030
2031         case DBUS_TYPE_STRUCT: {
2032                 DBusMessageIter sub;
2033                 dbus_message_iter_recurse(iter, &sub);
2034
2035                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2036                         uint32_t u;
2037
2038                         dbus_message_iter_get_basic(&sub, &u);
2039
2040                         if (u)
2041                                 printf("%s=%u\n", name, (unsigned) u);
2042                         else if (arg_all)
2043                                 printf("%s=\n", name);
2044
2045                         return 0;
2046                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2047                         const char *s;
2048
2049                         dbus_message_iter_get_basic(&sub, &s);
2050
2051                         if (arg_all || s[0])
2052                                 printf("%s=%s\n", name, s);
2053
2054                         return 0;
2055                 }
2056
2057                 break;
2058         }
2059
2060         case DBUS_TYPE_ARRAY:
2061
2062                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
2063                         DBusMessageIter sub;
2064                         bool space = false;
2065
2066                         dbus_message_iter_recurse(iter, &sub);
2067                         if (arg_all ||
2068                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2069                                 printf("%s=", name);
2070
2071                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2072                                         const char *s;
2073
2074                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
2075                                         dbus_message_iter_get_basic(&sub, &s);
2076                                         printf("%s%s", space ? " " : "", s);
2077
2078                                         space = true;
2079                                         dbus_message_iter_next(&sub);
2080                                 }
2081
2082                                 puts("");
2083                         }
2084
2085                         return 0;
2086
2087                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
2088                         DBusMessageIter sub;
2089
2090                         dbus_message_iter_recurse(iter, &sub);
2091                         if (arg_all ||
2092                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2093                                 printf("%s=", name);
2094
2095                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2096                                         uint8_t u;
2097
2098                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
2099                                         dbus_message_iter_get_basic(&sub, &u);
2100                                         printf("%02x", u);
2101
2102                                         dbus_message_iter_next(&sub);
2103                                 }
2104
2105                                 puts("");
2106                         }
2107
2108                         return 0;
2109
2110                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2111                         DBusMessageIter sub, sub2;
2112
2113                         dbus_message_iter_recurse(iter, &sub);
2114                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2115                                 const char *type, *path;
2116
2117                                 dbus_message_iter_recurse(&sub, &sub2);
2118
2119                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2120                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2121                                         printf("%s=%s\n", type, path);
2122
2123                                 dbus_message_iter_next(&sub);
2124                         }
2125
2126                         return 0;
2127
2128                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2129                         DBusMessageIter sub, sub2;
2130
2131                         dbus_message_iter_recurse(iter, &sub);
2132                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2133                                 const char *base;
2134                                 uint64_t value, next_elapse;
2135
2136                                 dbus_message_iter_recurse(&sub, &sub2);
2137
2138                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2139                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2140                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2141                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2142
2143                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2144                                                base,
2145                                                format_timespan(timespan1, sizeof(timespan1), value),
2146                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2147                                 }
2148
2149                                 dbus_message_iter_next(&sub);
2150                         }
2151
2152                         return 0;
2153
2154                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2155                         DBusMessageIter sub;
2156
2157                         dbus_message_iter_recurse(iter, &sub);
2158                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2159                                 ExecStatusInfo info;
2160
2161                                 zero(info);
2162                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2163                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2164                                         char *t;
2165
2166                                         t = strv_join(info.argv, " ");
2167
2168                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2169                                                name,
2170                                                strna(info.path),
2171                                                strna(t),
2172                                                yes_no(info.ignore),
2173                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2174                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2175                                                (unsigned) info. pid,
2176                                                sigchld_code_to_string(info.code),
2177                                                info.status,
2178                                                info.code == CLD_EXITED ? "" : "/",
2179                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2180
2181                                         free(t);
2182                                 }
2183
2184                                 free(info.path);
2185                                 strv_free(info.argv);
2186
2187                                 dbus_message_iter_next(&sub);
2188                         }
2189
2190                         return 0;
2191                 }
2192
2193                 break;
2194         }
2195
2196         if (arg_all)
2197                 printf("%s=[unprintable]\n", name);
2198
2199         return 0;
2200 }
2201
2202 static int show_one(DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2203         DBusMessage *m = NULL, *reply = NULL;
2204         const char *interface = "";
2205         int r;
2206         DBusError error;
2207         DBusMessageIter iter, sub, sub2, sub3;
2208         UnitStatusInfo info;
2209         ExecStatusInfo *p;
2210
2211         assert(bus);
2212         assert(path);
2213         assert(new_line);
2214
2215         zero(info);
2216         dbus_error_init(&error);
2217
2218         if (!(m = dbus_message_new_method_call(
2219                               "org.freedesktop.systemd1",
2220                               path,
2221                               "org.freedesktop.DBus.Properties",
2222                               "GetAll"))) {
2223                 log_error("Could not allocate message.");
2224                 r = -ENOMEM;
2225                 goto finish;
2226         }
2227
2228         if (!dbus_message_append_args(m,
2229                                       DBUS_TYPE_STRING, &interface,
2230                                       DBUS_TYPE_INVALID)) {
2231                 log_error("Could not append arguments to message.");
2232                 r = -ENOMEM;
2233                 goto finish;
2234         }
2235
2236         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2237                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2238                 r = -EIO;
2239                 goto finish;
2240         }
2241
2242         if (!dbus_message_iter_init(reply, &iter) ||
2243             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2244             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2245                 log_error("Failed to parse reply.");
2246                 r = -EIO;
2247                 goto finish;
2248         }
2249
2250         dbus_message_iter_recurse(&iter, &sub);
2251
2252         if (*new_line)
2253                 printf("\n");
2254
2255         *new_line = true;
2256
2257         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2258                 const char *name;
2259
2260                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2261                         log_error("Failed to parse reply.");
2262                         r = -EIO;
2263                         goto finish;
2264                 }
2265
2266                 dbus_message_iter_recurse(&sub, &sub2);
2267
2268                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2269                         log_error("Failed to parse reply.");
2270                         r = -EIO;
2271                         goto finish;
2272                 }
2273
2274                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2275                         log_error("Failed to parse reply.");
2276                         r = -EIO;
2277                         goto finish;
2278                 }
2279
2280                 dbus_message_iter_recurse(&sub2, &sub3);
2281
2282                 if (show_properties)
2283                         r = print_property(name, &sub3);
2284                 else
2285                         r = status_property(name, &sub3, &info);
2286
2287                 if (r < 0) {
2288                         log_error("Failed to parse reply.");
2289                         r = -EIO;
2290                         goto finish;
2291                 }
2292
2293                 dbus_message_iter_next(&sub);
2294         }
2295
2296         r = 0;
2297
2298         if (!show_properties)
2299                 print_status_info(&info);
2300
2301         if (!streq_ptr(info.active_state, "active") &&
2302             !streq_ptr(info.active_state, "reloading"))
2303                 /* According to LSB: "program not running" */
2304                 r = 3;
2305
2306         while ((p = info.exec)) {
2307                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2308                 exec_status_info_free(p);
2309         }
2310
2311 finish:
2312         if (m)
2313                 dbus_message_unref(m);
2314
2315         if (reply)
2316                 dbus_message_unref(reply);
2317
2318         dbus_error_free(&error);
2319
2320         return r;
2321 }
2322
2323 static int show(DBusConnection *bus, char **args, unsigned n) {
2324         DBusMessage *m = NULL, *reply = NULL;
2325         int r, ret = 0;
2326         DBusError error;
2327         unsigned i;
2328         bool show_properties, new_line = false;
2329
2330         assert(bus);
2331         assert(args);
2332
2333         dbus_error_init(&error);
2334
2335         show_properties = !streq(args[0], "status");
2336
2337         if (show_properties && n <= 1) {
2338                 /* If not argument is specified inspect the manager
2339                  * itself */
2340
2341                 ret = show_one(bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2342                 goto finish;
2343         }
2344
2345         for (i = 1; i < n; i++) {
2346                 const char *path = NULL;
2347                 uint32_t id;
2348
2349                 if (safe_atou32(args[i], &id) < 0) {
2350
2351                         /* Interpret as unit name */
2352
2353                         if (!(m = dbus_message_new_method_call(
2354                                               "org.freedesktop.systemd1",
2355                                               "/org/freedesktop/systemd1",
2356                                               "org.freedesktop.systemd1.Manager",
2357                                               "LoadUnit"))) {
2358                                 log_error("Could not allocate message.");
2359                                 ret = -ENOMEM;
2360                                 goto finish;
2361                         }
2362
2363                         if (!dbus_message_append_args(m,
2364                                                       DBUS_TYPE_STRING, &args[i],
2365                                                       DBUS_TYPE_INVALID)) {
2366                                 log_error("Could not append arguments to message.");
2367                                 ret = -ENOMEM;
2368                                 goto finish;
2369                         }
2370
2371                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2372
2373                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2374                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2375                                         ret = -EIO;
2376                                         goto finish;
2377                                 }
2378
2379                                 dbus_error_free(&error);
2380
2381                                 dbus_message_unref(m);
2382                                 if (!(m = dbus_message_new_method_call(
2383                                                       "org.freedesktop.systemd1",
2384                                                       "/org/freedesktop/systemd1",
2385                                                       "org.freedesktop.systemd1.Manager",
2386                                                       "GetUnit"))) {
2387                                         log_error("Could not allocate message.");
2388                                         ret = -ENOMEM;
2389                                         goto finish;
2390                                 }
2391
2392                                 if (!dbus_message_append_args(m,
2393                                                               DBUS_TYPE_STRING, &args[i],
2394                                                               DBUS_TYPE_INVALID)) {
2395                                         log_error("Could not append arguments to message.");
2396                                         ret = -ENOMEM;
2397                                         goto finish;
2398                                 }
2399
2400                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2401                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2402
2403                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2404                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2405                                         else
2406                                                 ret = -EIO;
2407                                         goto finish;
2408                                 }
2409                         }
2410
2411                 } else if (show_properties) {
2412
2413                         /* Interpret as job id */
2414
2415                         if (!(m = dbus_message_new_method_call(
2416                                               "org.freedesktop.systemd1",
2417                                               "/org/freedesktop/systemd1",
2418                                               "org.freedesktop.systemd1.Manager",
2419                                               "GetJob"))) {
2420                                 log_error("Could not allocate message.");
2421                                 ret = -ENOMEM;
2422                                 goto finish;
2423                         }
2424
2425                         if (!dbus_message_append_args(m,
2426                                                       DBUS_TYPE_UINT32, &id,
2427                                                       DBUS_TYPE_INVALID)) {
2428                                 log_error("Could not append arguments to message.");
2429                                 ret = -ENOMEM;
2430                                 goto finish;
2431                         }
2432
2433                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2434                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2435                                 ret = -EIO;
2436                                 goto finish;
2437                         }
2438                 } else {
2439
2440                         /* Interpret as PID */
2441
2442                         if (!(m = dbus_message_new_method_call(
2443                                               "org.freedesktop.systemd1",
2444                                               "/org/freedesktop/systemd1",
2445                                               "org.freedesktop.systemd1.Manager",
2446                                               "GetUnitByPID"))) {
2447                                 log_error("Could not allocate message.");
2448                                 ret = -ENOMEM;
2449                                 goto finish;
2450                         }
2451
2452                         if (!dbus_message_append_args(m,
2453                                                       DBUS_TYPE_UINT32, &id,
2454                                                       DBUS_TYPE_INVALID)) {
2455                                 log_error("Could not append arguments to message.");
2456                                 ret = -ENOMEM;
2457                                 goto finish;
2458                         }
2459
2460                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2461                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2462                                 ret = -EIO;
2463                                 goto finish;
2464                         }
2465                 }
2466
2467                 if (!dbus_message_get_args(reply, &error,
2468                                            DBUS_TYPE_OBJECT_PATH, &path,
2469                                            DBUS_TYPE_INVALID)) {
2470                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2471                         ret = -EIO;
2472                         goto finish;
2473                 }
2474
2475                 if ((r = show_one(bus, path, show_properties, &new_line)) != 0)
2476                         ret = r;
2477
2478                 dbus_message_unref(m);
2479                 dbus_message_unref(reply);
2480                 m = reply = NULL;
2481         }
2482
2483 finish:
2484         if (m)
2485                 dbus_message_unref(m);
2486
2487         if (reply)
2488                 dbus_message_unref(reply);
2489
2490         dbus_error_free(&error);
2491
2492         return ret;
2493 }
2494
2495 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2496         DBusError error;
2497         DBusMessage *m = NULL, *reply = NULL;
2498
2499         assert(connection);
2500         assert(message);
2501
2502         dbus_error_init(&error);
2503
2504         log_debug("Got D-Bus request: %s.%s() on %s",
2505                   dbus_message_get_interface(message),
2506                   dbus_message_get_member(message),
2507                   dbus_message_get_path(message));
2508
2509         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2510                 log_error("Warning! D-Bus connection terminated.");
2511                 dbus_connection_close(connection);
2512
2513         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2514                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2515                 const char *id, *path;
2516
2517                 if (!dbus_message_get_args(message, &error,
2518                                            DBUS_TYPE_STRING, &id,
2519                                            DBUS_TYPE_OBJECT_PATH, &path,
2520                                            DBUS_TYPE_INVALID))
2521                         log_error("Failed to parse message: %s", bus_error_message(&error));
2522                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2523                         printf("Unit %s added.\n", id);
2524                 else
2525                         printf("Unit %s removed.\n", id);
2526
2527         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
2528                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2529                 uint32_t id;
2530                 const char *path;
2531
2532                 if (!dbus_message_get_args(message, &error,
2533                                            DBUS_TYPE_UINT32, &id,
2534                                            DBUS_TYPE_OBJECT_PATH, &path,
2535                                            DBUS_TYPE_INVALID))
2536                         log_error("Failed to parse message: %s", bus_error_message(&error));
2537                 else if (streq(dbus_message_get_member(message), "JobNew"))
2538                         printf("Job %u added.\n", id);
2539                 else
2540                         printf("Job %u removed.\n", id);
2541
2542
2543         } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) {
2544
2545                 const char *path, *interface, *property = "Id";
2546                 DBusMessageIter iter, sub;
2547
2548                 path = dbus_message_get_path(message);
2549
2550                 if (!dbus_message_get_args(message, &error,
2551                                           DBUS_TYPE_STRING, &interface,
2552                                           DBUS_TYPE_INVALID)) {
2553                         log_error("Failed to parse message: %s", bus_error_message(&error));
2554                         goto finish;
2555                 }
2556
2557                 if (!streq(interface, "org.freedesktop.systemd1.Job") &&
2558                     !streq(interface, "org.freedesktop.systemd1.Unit"))
2559                         goto finish;
2560
2561                 if (!(m = dbus_message_new_method_call(
2562                               "org.freedesktop.systemd1",
2563                               path,
2564                               "org.freedesktop.DBus.Properties",
2565                               "Get"))) {
2566                         log_error("Could not allocate message.");
2567                         goto oom;
2568                 }
2569
2570                 if (!dbus_message_append_args(m,
2571                                               DBUS_TYPE_STRING, &interface,
2572                                               DBUS_TYPE_STRING, &property,
2573                                               DBUS_TYPE_INVALID)) {
2574                         log_error("Could not append arguments to message.");
2575                         goto finish;
2576                 }
2577
2578                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2579                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2580                         goto finish;
2581                 }
2582
2583                 if (!dbus_message_iter_init(reply, &iter) ||
2584                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2585                         log_error("Failed to parse reply.");
2586                         goto finish;
2587                 }
2588
2589                 dbus_message_iter_recurse(&iter, &sub);
2590
2591                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2592                         const char *id;
2593
2594                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2595                                 log_error("Failed to parse reply.");
2596                                 goto finish;
2597                         }
2598
2599                         dbus_message_iter_get_basic(&sub, &id);
2600                         printf("Unit %s changed.\n", id);
2601                 } else {
2602                         uint32_t id;
2603
2604                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2605                                 log_error("Failed to parse reply.");
2606                                 goto finish;
2607                         }
2608
2609                         dbus_message_iter_get_basic(&sub, &id);
2610                         printf("Job %u changed.\n", id);
2611                 }
2612         }
2613
2614 finish:
2615         if (m)
2616                 dbus_message_unref(m);
2617
2618         if (reply)
2619                 dbus_message_unref(reply);
2620
2621         dbus_error_free(&error);
2622         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2623
2624 oom:
2625         if (m)
2626                 dbus_message_unref(m);
2627
2628         if (reply)
2629                 dbus_message_unref(reply);
2630
2631         dbus_error_free(&error);
2632         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2633 }
2634
2635 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2636         DBusMessage *m = NULL, *reply = NULL;
2637         DBusError error;
2638         int r;
2639
2640         dbus_error_init(&error);
2641
2642         if (!private_bus) {
2643                 dbus_bus_add_match(bus,
2644                                    "type='signal',"
2645                                    "sender='org.freedesktop.systemd1',"
2646                                    "interface='org.freedesktop.systemd1.Manager',"
2647                                    "path='/org/freedesktop/systemd1'",
2648                                    &error);
2649
2650                 if (dbus_error_is_set(&error)) {
2651                         log_error("Failed to add match: %s", bus_error_message(&error));
2652                         r = -EIO;
2653                         goto finish;
2654                 }
2655
2656                 dbus_bus_add_match(bus,
2657                                    "type='signal',"
2658                                    "sender='org.freedesktop.systemd1',"
2659                                    "interface='org.freedesktop.DBus.Properties',"
2660                                    "member='PropertiesChanged'",
2661                                    &error);
2662
2663                 if (dbus_error_is_set(&error)) {
2664                         log_error("Failed to add match: %s", bus_error_message(&error));
2665                         r = -EIO;
2666                         goto finish;
2667                 }
2668         }
2669
2670         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
2671                 log_error("Failed to add filter.");
2672                 r = -ENOMEM;
2673                 goto finish;
2674         }
2675
2676         if (!(m = dbus_message_new_method_call(
2677                               "org.freedesktop.systemd1",
2678                               "/org/freedesktop/systemd1",
2679                               "org.freedesktop.systemd1.Manager",
2680                               "Subscribe"))) {
2681                 log_error("Could not allocate message.");
2682                 r = -ENOMEM;
2683                 goto finish;
2684         }
2685
2686         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2687                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2688                 r = -EIO;
2689                 goto finish;
2690         }
2691
2692         while (dbus_connection_read_write_dispatch(bus, -1))
2693                 ;
2694
2695         r = 0;
2696
2697 finish:
2698
2699         /* This is slightly dirty, since we don't undo the filter or the matches. */
2700
2701         if (m)
2702                 dbus_message_unref(m);
2703
2704         if (reply)
2705                 dbus_message_unref(reply);
2706
2707         dbus_error_free(&error);
2708
2709         return r;
2710 }
2711
2712 static int dump(DBusConnection *bus, char **args, unsigned n) {
2713         DBusMessage *m = NULL, *reply = NULL;
2714         DBusError error;
2715         int r;
2716         const char *text;
2717
2718         dbus_error_init(&error);
2719
2720         if (!(m = dbus_message_new_method_call(
2721                               "org.freedesktop.systemd1",
2722                               "/org/freedesktop/systemd1",
2723                               "org.freedesktop.systemd1.Manager",
2724                               "Dump"))) {
2725                 log_error("Could not allocate message.");
2726                 return -ENOMEM;
2727         }
2728
2729         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2730                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2731                 r = -EIO;
2732                 goto finish;
2733         }
2734
2735         if (!dbus_message_get_args(reply, &error,
2736                                    DBUS_TYPE_STRING, &text,
2737                                    DBUS_TYPE_INVALID)) {
2738                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2739                 r = -EIO;
2740                 goto finish;
2741         }
2742
2743         fputs(text, stdout);
2744
2745         r = 0;
2746
2747 finish:
2748         if (m)
2749                 dbus_message_unref(m);
2750
2751         if (reply)
2752                 dbus_message_unref(reply);
2753
2754         dbus_error_free(&error);
2755
2756         return r;
2757 }
2758
2759 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
2760         DBusMessage *m = NULL, *reply = NULL;
2761         DBusError error;
2762         int r;
2763         const char *name = "", *path, *id;
2764         dbus_bool_t cleanup = FALSE;
2765         DBusMessageIter iter, sub;
2766         const char
2767                 *interface = "org.freedesktop.systemd1.Unit",
2768                 *property = "Id";
2769
2770         dbus_error_init(&error);
2771
2772         if (!(m = dbus_message_new_method_call(
2773                               "org.freedesktop.systemd1",
2774                               "/org/freedesktop/systemd1",
2775                               "org.freedesktop.systemd1.Manager",
2776                               "CreateSnapshot"))) {
2777                 log_error("Could not allocate message.");
2778                 return -ENOMEM;
2779         }
2780
2781         if (n > 1)
2782                 name = args[1];
2783
2784         if (!dbus_message_append_args(m,
2785                                       DBUS_TYPE_STRING, &name,
2786                                       DBUS_TYPE_BOOLEAN, &cleanup,
2787                                       DBUS_TYPE_INVALID)) {
2788                 log_error("Could not append arguments to message.");
2789                 r = -ENOMEM;
2790                 goto finish;
2791         }
2792
2793         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2794                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2795                 r = -EIO;
2796                 goto finish;
2797         }
2798
2799         if (!dbus_message_get_args(reply, &error,
2800                                    DBUS_TYPE_OBJECT_PATH, &path,
2801                                    DBUS_TYPE_INVALID)) {
2802                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2803                 r = -EIO;
2804                 goto finish;
2805         }
2806
2807         dbus_message_unref(m);
2808         if (!(m = dbus_message_new_method_call(
2809                               "org.freedesktop.systemd1",
2810                               path,
2811                               "org.freedesktop.DBus.Properties",
2812                               "Get"))) {
2813                 log_error("Could not allocate message.");
2814                 return -ENOMEM;
2815         }
2816
2817         if (!dbus_message_append_args(m,
2818                                       DBUS_TYPE_STRING, &interface,
2819                                       DBUS_TYPE_STRING, &property,
2820                                       DBUS_TYPE_INVALID)) {
2821                 log_error("Could not append arguments to message.");
2822                 r = -ENOMEM;
2823                 goto finish;
2824         }
2825
2826         dbus_message_unref(reply);
2827         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2828                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2829                 r = -EIO;
2830                 goto finish;
2831         }
2832
2833         if (!dbus_message_iter_init(reply, &iter) ||
2834             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2835                 log_error("Failed to parse reply.");
2836                 r = -EIO;
2837                 goto finish;
2838         }
2839
2840         dbus_message_iter_recurse(&iter, &sub);
2841
2842         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2843                 log_error("Failed to parse reply.");
2844                 r = -EIO;
2845                 goto finish;
2846         }
2847
2848         dbus_message_iter_get_basic(&sub, &id);
2849
2850         if (!arg_quiet)
2851                 puts(id);
2852         r = 0;
2853
2854 finish:
2855         if (m)
2856                 dbus_message_unref(m);
2857
2858         if (reply)
2859                 dbus_message_unref(reply);
2860
2861         dbus_error_free(&error);
2862
2863         return r;
2864 }
2865
2866 static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) {
2867         DBusMessage *m = NULL, *reply = NULL;
2868         int r;
2869         DBusError error;
2870         unsigned i;
2871
2872         assert(bus);
2873         assert(args);
2874
2875         dbus_error_init(&error);
2876
2877         for (i = 1; i < n; i++) {
2878                 const char *path = NULL;
2879
2880                 if (!(m = dbus_message_new_method_call(
2881                                       "org.freedesktop.systemd1",
2882                                       "/org/freedesktop/systemd1",
2883                                       "org.freedesktop.systemd1.Manager",
2884                                       "GetUnit"))) {
2885                         log_error("Could not allocate message.");
2886                         r = -ENOMEM;
2887                         goto finish;
2888                 }
2889
2890                 if (!dbus_message_append_args(m,
2891                                               DBUS_TYPE_STRING, &args[i],
2892                                               DBUS_TYPE_INVALID)) {
2893                         log_error("Could not append arguments to message.");
2894                         r = -ENOMEM;
2895                         goto finish;
2896                 }
2897
2898                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2899                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2900                         r = -EIO;
2901                         goto finish;
2902                 }
2903
2904                 if (!dbus_message_get_args(reply, &error,
2905                                            DBUS_TYPE_OBJECT_PATH, &path,
2906                                            DBUS_TYPE_INVALID)) {
2907                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2908                         r = -EIO;
2909                         goto finish;
2910                 }
2911
2912                 dbus_message_unref(m);
2913                 if (!(m = dbus_message_new_method_call(
2914                                       "org.freedesktop.systemd1",
2915                                       path,
2916                                       "org.freedesktop.systemd1.Snapshot",
2917                                       "Remove"))) {
2918                         log_error("Could not allocate message.");
2919                         r = -ENOMEM;
2920                         goto finish;
2921                 }
2922
2923                 dbus_message_unref(reply);
2924                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2925                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2926                         r = -EIO;
2927                         goto finish;
2928                 }
2929
2930                 dbus_message_unref(m);
2931                 dbus_message_unref(reply);
2932                 m = reply = NULL;
2933         }
2934
2935         r = 0;
2936
2937 finish:
2938         if (m)
2939                 dbus_message_unref(m);
2940
2941         if (reply)
2942                 dbus_message_unref(reply);
2943
2944         dbus_error_free(&error);
2945
2946         return r;
2947 }
2948
2949 static int daemon_reload(DBusConnection *bus, char **args, unsigned n) {
2950         DBusMessage *m = NULL, *reply = NULL;
2951         DBusError error;
2952         int r;
2953         const char *method;
2954
2955         dbus_error_init(&error);
2956
2957         if (arg_action == ACTION_RELOAD)
2958                 method = "Reload";
2959         else if (arg_action == ACTION_REEXEC)
2960                 method = "Reexecute";
2961         else {
2962                 assert(arg_action == ACTION_SYSTEMCTL);
2963
2964                 method =
2965                         streq(args[0], "clear-jobs")        ||
2966                         streq(args[0], "cancel")            ? "ClearJobs" :
2967                         streq(args[0], "daemon-reexec")     ? "Reexecute" :
2968                         streq(args[0], "reset-failed")      ? "ResetFailed" :
2969                         streq(args[0], "daemon-exit")       ? "Exit" :
2970                                                               "Reload";
2971         }
2972
2973         if (!(m = dbus_message_new_method_call(
2974                               "org.freedesktop.systemd1",
2975                               "/org/freedesktop/systemd1",
2976                               "org.freedesktop.systemd1.Manager",
2977                               method))) {
2978                 log_error("Could not allocate message.");
2979                 return -ENOMEM;
2980         }
2981
2982         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2983
2984                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
2985                         /* There's always a fallback possible for
2986                          * legacy actions. */
2987                         r = -EADDRNOTAVAIL;
2988                         goto finish;
2989                 }
2990
2991                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2992                 r = -EIO;
2993                 goto finish;
2994         }
2995
2996         r = 0;
2997
2998 finish:
2999         if (m)
3000                 dbus_message_unref(m);
3001
3002         if (reply)
3003                 dbus_message_unref(reply);
3004
3005         dbus_error_free(&error);
3006
3007         return r;
3008 }
3009
3010 static int reset_failed(DBusConnection *bus, char **args, unsigned n) {
3011         DBusMessage *m = NULL, *reply = NULL;
3012         unsigned i;
3013         int r;
3014         DBusError error;
3015
3016         assert(bus);
3017         dbus_error_init(&error);
3018
3019         if (n <= 1)
3020                 return daemon_reload(bus, args, n);
3021
3022         for (i = 1; i < n; i++) {
3023
3024                 if (!(m = dbus_message_new_method_call(
3025                                       "org.freedesktop.systemd1",
3026                                       "/org/freedesktop/systemd1",
3027                                       "org.freedesktop.systemd1.Manager",
3028                                       "ResetFailedUnit"))) {
3029                         log_error("Could not allocate message.");
3030                         r = -ENOMEM;
3031                         goto finish;
3032                 }
3033
3034                 if (!dbus_message_append_args(m,
3035                                               DBUS_TYPE_STRING, args + i,
3036                                               DBUS_TYPE_INVALID)) {
3037                         log_error("Could not append arguments to message.");
3038                         r = -ENOMEM;
3039                         goto finish;
3040                 }
3041
3042                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3043                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3044                         r = -EIO;
3045                         goto finish;
3046                 }
3047
3048                 dbus_message_unref(m);
3049                 dbus_message_unref(reply);
3050                 m = reply = NULL;
3051         }
3052
3053         r = 0;
3054
3055 finish:
3056         if (m)
3057                 dbus_message_unref(m);
3058
3059         if (reply)
3060                 dbus_message_unref(reply);
3061
3062         dbus_error_free(&error);
3063
3064         return r;
3065 }
3066
3067 static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
3068         DBusMessage *m = NULL, *reply = NULL;
3069         DBusError error;
3070         DBusMessageIter iter, sub, sub2;
3071         int r;
3072         const char
3073                 *interface = "org.freedesktop.systemd1.Manager",
3074                 *property = "Environment";
3075
3076         dbus_error_init(&error);
3077
3078         if (!(m = dbus_message_new_method_call(
3079                               "org.freedesktop.systemd1",
3080                               "/org/freedesktop/systemd1",
3081                               "org.freedesktop.DBus.Properties",
3082                               "Get"))) {
3083                 log_error("Could not allocate message.");
3084                 return -ENOMEM;
3085         }
3086
3087         if (!dbus_message_append_args(m,
3088                                       DBUS_TYPE_STRING, &interface,
3089                                       DBUS_TYPE_STRING, &property,
3090                                       DBUS_TYPE_INVALID)) {
3091                 log_error("Could not append arguments to message.");
3092                 r = -ENOMEM;
3093                 goto finish;
3094         }
3095
3096         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3097                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3098                 r = -EIO;
3099                 goto finish;
3100         }
3101
3102         if (!dbus_message_iter_init(reply, &iter) ||
3103             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3104                 log_error("Failed to parse reply.");
3105                 r = -EIO;
3106                 goto finish;
3107         }
3108
3109         dbus_message_iter_recurse(&iter, &sub);
3110
3111         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3112             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3113                 log_error("Failed to parse reply.");
3114                 r = -EIO;
3115                 goto finish;
3116         }
3117
3118         dbus_message_iter_recurse(&sub, &sub2);
3119
3120         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3121                 const char *text;
3122
3123                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3124                         log_error("Failed to parse reply.");
3125                         r = -EIO;
3126                         goto finish;
3127                 }
3128
3129                 dbus_message_iter_get_basic(&sub2, &text);
3130                 printf("%s\n", text);
3131
3132                 dbus_message_iter_next(&sub2);
3133         }
3134
3135         r = 0;
3136
3137 finish:
3138         if (m)
3139                 dbus_message_unref(m);
3140
3141         if (reply)
3142                 dbus_message_unref(reply);
3143
3144         dbus_error_free(&error);
3145
3146         return r;
3147 }
3148
3149 static int set_environment(DBusConnection *bus, char **args, unsigned n) {
3150         DBusMessage *m = NULL, *reply = NULL;
3151         DBusError error;
3152         int r;
3153         const char *method;
3154         DBusMessageIter iter, sub;
3155         unsigned i;
3156
3157         dbus_error_init(&error);
3158
3159         method = streq(args[0], "set-environment")
3160                 ? "SetEnvironment"
3161                 : "UnsetEnvironment";
3162
3163         if (!(m = dbus_message_new_method_call(
3164                               "org.freedesktop.systemd1",
3165                               "/org/freedesktop/systemd1",
3166                               "org.freedesktop.systemd1.Manager",
3167                               method))) {
3168
3169                 log_error("Could not allocate message.");
3170                 return -ENOMEM;
3171         }
3172
3173         dbus_message_iter_init_append(m, &iter);
3174
3175         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
3176                 log_error("Could not append arguments to message.");
3177                 r = -ENOMEM;
3178                 goto finish;
3179         }
3180
3181         for (i = 1; i < n; i++)
3182                 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) {
3183                         log_error("Could not append arguments to message.");
3184                         r = -ENOMEM;
3185                         goto finish;
3186                 }
3187
3188         if (!dbus_message_iter_close_container(&iter, &sub)) {
3189                 log_error("Could not append arguments to message.");
3190                 r = -ENOMEM;
3191                 goto finish;
3192         }
3193
3194         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3195                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3196                 r = -EIO;
3197                 goto finish;
3198         }
3199
3200         r = 0;
3201
3202 finish:
3203         if (m)
3204                 dbus_message_unref(m);
3205
3206         if (reply)
3207                 dbus_message_unref(reply);
3208
3209         dbus_error_free(&error);
3210
3211         return r;
3212 }
3213
3214 typedef struct {
3215         char *name;
3216         char *path;
3217
3218         char **aliases;
3219         char **wanted_by;
3220 } InstallInfo;
3221
3222 static Hashmap *will_install = NULL, *have_installed = NULL;
3223 static Set *remove_symlinks_to = NULL;
3224
3225 static void install_info_free(InstallInfo *i) {
3226         assert(i);
3227
3228         free(i->name);
3229         free(i->path);
3230         strv_free(i->aliases);
3231         strv_free(i->wanted_by);
3232         free(i);
3233 }
3234
3235 static void install_info_hashmap_free(Hashmap *m) {
3236         InstallInfo *i;
3237
3238         while ((i = hashmap_steal_first(m)))
3239                 install_info_free(i);
3240
3241         hashmap_free(m);
3242 }
3243
3244 static int install_info_add(const char *name) {
3245         InstallInfo *i;
3246         int r;
3247
3248         assert(will_install);
3249
3250         if (!unit_name_is_valid_no_type(name, true)) {
3251                 log_warning("Unit name %s is not a valid unit name.", name);
3252                 return -EINVAL;
3253         }
3254
3255         if (hashmap_get(have_installed, name) ||
3256             hashmap_get(will_install, name))
3257                 return 0;
3258
3259         if (!(i = new0(InstallInfo, 1))) {
3260                 r = -ENOMEM;
3261                 goto fail;
3262         }
3263
3264         if (!(i->name = strdup(name))) {
3265                 r = -ENOMEM;
3266                 goto fail;
3267         }
3268
3269         if ((r = hashmap_put(will_install, i->name, i)) < 0)
3270                 goto fail;
3271
3272         return 0;
3273
3274 fail:
3275         if (i)
3276                 install_info_free(i);
3277
3278         return r;
3279 }
3280
3281 static int config_parse_also(
3282                 const char *filename,
3283                 unsigned line,
3284                 const char *section,
3285                 const char *lvalue,
3286                 const char *rvalue,
3287                 void *data,
3288                 void *userdata) {
3289
3290         char *w;
3291         size_t l;
3292         char *state;
3293
3294         assert(filename);
3295         assert(lvalue);
3296         assert(rvalue);
3297
3298         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
3299                 char *n;
3300                 int r;
3301
3302                 if (!(n = strndup(w, l)))
3303                         return -ENOMEM;
3304
3305                 if ((r = install_info_add(n)) < 0) {
3306                         log_warning("Cannot install unit %s: %s", n, strerror(-r));
3307                         free(n);
3308                         return r;
3309                 }
3310
3311                 free(n);
3312         }
3313
3314         return 0;
3315 }
3316
3317 static int mark_symlink_for_removal(const char *p) {
3318         char *n;
3319         int r;
3320
3321         assert(p);
3322         assert(path_is_absolute(p));
3323
3324         if (!remove_symlinks_to)
3325                 return 0;
3326
3327         if (!(n = strdup(p)))
3328                 return -ENOMEM;
3329
3330         path_kill_slashes(n);
3331
3332         if ((r = set_put(remove_symlinks_to, n)) < 0) {
3333                 free(n);
3334                 return r == -EEXIST ? 0 : r;
3335         }
3336
3337         return 0;
3338 }
3339
3340 static int remove_marked_symlinks_fd(int fd, const char *config_path, const char *root, bool *deleted) {
3341         int r = 0;
3342         DIR *d;
3343         struct dirent *de;
3344
3345         assert(fd >= 0);
3346         assert(root);
3347         assert(deleted);
3348
3349         if (!(d = fdopendir(fd))) {
3350                 close_nointr_nofail(fd);
3351                 return -errno;
3352         }
3353
3354         rewinddir(d);
3355
3356         while ((de = readdir(d))) {
3357                 bool is_dir = false, is_link = false;
3358
3359                 if (ignore_file(de->d_name))
3360                         continue;
3361
3362                 if (de->d_type == DT_LNK)
3363                         is_link = true;
3364                 else if (de->d_type == DT_DIR)
3365                         is_dir = true;
3366                 else if (de->d_type == DT_UNKNOWN) {
3367                         struct stat st;
3368
3369                         if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
3370                                 log_error("Failed to stat %s/%s: %m", root, de->d_name);
3371
3372                                 if (r == 0)
3373                                         r = -errno;
3374                                 continue;
3375                         }
3376
3377                         is_link = S_ISLNK(st.st_mode);
3378                         is_dir = S_ISDIR(st.st_mode);
3379                 } else
3380                         continue;
3381
3382                 if (is_dir) {
3383                         int nfd, q;
3384                         char *p;
3385
3386                         if ((nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0) {
3387                                 log_error("Failed to open %s/%s: %m", root, de->d_name);
3388
3389                                 if (r == 0)
3390                                         r = -errno;
3391                                 continue;
3392                         }
3393
3394                         if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
3395                                 log_error("Failed to allocate directory string.");
3396                                 close_nointr_nofail(nfd);
3397                                 r = -ENOMEM;
3398                                 break;
3399                         }
3400
3401                         /* This will close nfd, regardless whether it succeeds or not */
3402                         q = remove_marked_symlinks_fd(nfd, config_path, p, deleted);
3403                         free(p);
3404
3405                         if (r == 0)
3406                                 r = q;
3407
3408                 } else if (is_link) {
3409                         char *p, *dest, *c;
3410                         int q;
3411
3412                         if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
3413                                 log_error("Failed to allocate symlink string.");
3414                                 r = -ENOMEM;
3415                                 break;
3416                         }
3417
3418                         if ((q = readlink_and_make_absolute(p, &dest)) < 0) {
3419                                 log_error("Cannot read symlink %s: %s", p, strerror(-q));
3420                                 free(p);
3421
3422                                 if (r == 0)
3423                                         r = q;
3424                                 continue;
3425                         }
3426
3427                         if ((c = canonicalize_file_name(dest))) {
3428                                 /* This might fail if the destination
3429                                  * is already removed */
3430
3431                                 free(dest);
3432                                 dest = c;
3433                         }
3434
3435                         path_kill_slashes(dest);
3436                         if (set_get(remove_symlinks_to, dest)) {
3437
3438                                 if (!arg_quiet)
3439                                         log_info("rm '%s'", p);
3440
3441                                 if (unlink(p) < 0) {
3442                                         log_error("Cannot unlink symlink %s: %m", p);
3443
3444                                         if (r == 0)
3445                                                 r = -errno;
3446                                 } else {
3447                                         rmdir_parents(p, config_path);
3448                                         path_kill_slashes(p);
3449
3450                                         if (!set_get(remove_symlinks_to, p)) {
3451
3452                                                 if ((r = mark_symlink_for_removal(p)) < 0) {
3453                                                         if (r == 0)
3454                                                                 r = q;
3455                                                 } else
3456                                                         *deleted = true;
3457                                         }
3458                                 }
3459                         }
3460
3461                         free(p);
3462                         free(dest);
3463                 }
3464         }
3465
3466         closedir(d);
3467
3468         return r;
3469 }
3470
3471 static int remove_marked_symlinks(const char *config_path) {
3472         int fd, r = 0;
3473         bool deleted;
3474
3475         assert(config_path);
3476
3477         if (set_size(remove_symlinks_to) <= 0)
3478                 return 0;
3479
3480         if ((fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0)
3481                 return -errno;
3482
3483         do {
3484                 int q, cfd;
3485                 deleted = false;
3486
3487                 if ((cfd = dup(fd)) < 0) {
3488                         r = -errno;
3489                         break;
3490                 }
3491
3492                 /* This takes possession of cfd and closes it */
3493                 if ((q = remove_marked_symlinks_fd(cfd, config_path, config_path, &deleted)) < 0) {
3494                         if (r == 0)
3495                                 r = q;
3496                 }
3497         } while (deleted);
3498
3499         close_nointr_nofail(fd);
3500
3501         return r;
3502 }
3503
3504 static int create_symlink(const char *verb, const char *old_path, const char *new_path) {
3505         int r;
3506
3507         assert(old_path);
3508         assert(new_path);
3509         assert(verb);
3510
3511         if (streq(verb, "enable")) {
3512                 char *dest;
3513
3514                 mkdir_parents(new_path, 0755);
3515
3516                 if (symlink(old_path, new_path) >= 0) {
3517
3518                         if (!arg_quiet)
3519                                 log_info("ln -s '%s' '%s'", old_path, new_path);
3520
3521                         return 0;
3522                 }
3523
3524                 if (errno != EEXIST) {
3525                         log_error("Cannot link %s to %s: %m", old_path, new_path);
3526                         return -errno;
3527                 }
3528
3529                 if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
3530
3531                         if (errno == EINVAL) {
3532                                 log_error("Cannot link %s to %s, file exists already and is not a symlink.", old_path, new_path);
3533                                 return -EEXIST;
3534                         }
3535
3536                         log_error("readlink() failed: %s", strerror(-r));
3537                         return r;
3538                 }
3539
3540                 if (streq(dest, old_path)) {
3541                         free(dest);
3542                         return 0;
3543                 }
3544
3545                 if (!arg_force) {
3546                         log_error("Cannot link %s to %s, symlink exists already and points to %s.", old_path, new_path, dest);
3547                         free(dest);
3548                         return -EEXIST;
3549                 }
3550
3551                 free(dest);
3552                 unlink(new_path);
3553
3554                 if (!arg_quiet)
3555                         log_info("ln -s '%s' '%s'", old_path, new_path);
3556
3557                 if (symlink(old_path, new_path) >= 0)
3558                         return 0;
3559
3560                 log_error("Cannot link %s to %s: %m", old_path, new_path);
3561                 return -errno;
3562
3563         } else if (streq(verb, "disable")) {
3564                 char *dest;
3565
3566                 if ((r = mark_symlink_for_removal(old_path)) < 0)
3567                         return r;
3568
3569                 if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
3570                         if (errno == ENOENT)
3571                                 return 0;
3572
3573                         if (errno == EINVAL) {
3574                                 log_warning("File %s not a symlink, ignoring.", old_path);
3575                                 return 0;
3576                         }
3577
3578                         log_error("readlink() failed: %s", strerror(-r));
3579                         return r;
3580                 }
3581
3582                 if (!streq(dest, old_path)) {
3583                         log_warning("File %s not a symlink to %s but points to %s, ignoring.", new_path, old_path, dest);
3584                         free(dest);
3585                         return 0;
3586                 }
3587
3588                 free(dest);
3589
3590                 if ((r = mark_symlink_for_removal(new_path)) < 0)
3591                         return r;
3592
3593                 if (!arg_quiet)
3594                         log_info("rm '%s'", new_path);
3595
3596                 if (unlink(new_path) >= 0)
3597                         return 0;
3598
3599                 log_error("Cannot unlink %s: %m", new_path);
3600                 return -errno;
3601
3602         } else if (streq(verb, "is-enabled")) {
3603                 char *dest;
3604
3605                 if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
3606
3607                         if (errno == ENOENT || errno == EINVAL)
3608                                 return 0;
3609
3610                         log_error("readlink() failed: %s", strerror(-r));
3611                         return r;
3612                 }
3613
3614                 if (streq(dest, old_path)) {
3615                         free(dest);
3616                         return 1;
3617                 }
3618
3619                 return 0;
3620         }
3621
3622         assert_not_reached("Unknown action.");
3623 }
3624
3625 static int install_info_symlink_alias(const char *verb, InstallInfo *i, const char *config_path) {
3626         char **s;
3627         char *alias_path = NULL;
3628         int r;
3629
3630         assert(verb);
3631         assert(i);
3632         assert(config_path);
3633
3634         STRV_FOREACH(s, i->aliases) {
3635
3636                 free(alias_path);
3637                 if (!(alias_path = path_make_absolute(*s, config_path))) {
3638                         log_error("Out of memory");
3639                         r = -ENOMEM;
3640                         goto finish;
3641                 }
3642
3643                 if ((r = create_symlink(verb, i->path, alias_path)) != 0)
3644                         goto finish;
3645
3646                 if (streq(verb, "disable"))
3647                         rmdir_parents(alias_path, config_path);
3648         }
3649         r = 0;
3650
3651 finish:
3652         free(alias_path);
3653