src/shared/bus-util.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <inttypes.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/ioctl.h>
  27 #include <sys/resource.h>
  28 #include <sys/socket.h>
  29 #include <unistd.h>
  30
  31 #include "sd-bus-protocol.h"
  32 #include "sd-bus.h"
  33 #include "sd-daemon.h"
  34 #include "sd-event.h"
  35 #include "sd-id128.h"
  36
  37 #include "alloc-util.h"
  38 #include "bus-internal.h"
  39 #include "bus-label.h"
  40 #include "bus-message.h"
  41 #include "bus-util.h"
  42 #include "def.h"
  43 #include "escape.h"
  44 #include "fd-util.h"
  45 #include "missing.h"
  46 #include "nsflags.h"
  47 #include "parse-util.h"
  48 #include "proc-cmdline.h"
  49 #include "rlimit-util.h"
  50 #include "stdio-util.h"
  51 #include "strv.h"
  52 #include "user-util.h"
  53
  54 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  55         sd_event *e = userdata;
  56
  57         assert(m);
  58         assert(e);
  59
  60         sd_bus_close(sd_bus_message_get_bus(m));
  61         sd_event_exit(e, 0);
  62
  63         return 1;
  64 }
  65
  66 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
  67         _cleanup_free_ char *match = NULL;
  68         const char *unique;
  69         int r;
  70
  71         assert(e);
  72         assert(bus);
  73         assert(name);
  74
  75         /* We unregister the name here and then wait for the
  76          * NameOwnerChanged signal for this event to arrive before we
  77          * quit. We do this in order to make sure that any queued
  78          * requests are still processed before we really exit. */
  79
  80         r = sd_bus_get_unique_name(bus, &unique);
  81         if (r < 0)
  82                 return r;
  83
  84         r = asprintf(&match,
  85                      "sender='org.freedesktop.DBus',"
  86                      "type='signal',"
  87                      "interface='org.freedesktop.DBus',"
  88                      "member='NameOwnerChanged',"
  89                      "path='/org/freedesktop/DBus',"
  90                      "arg0='%s',"
  91                      "arg1='%s',"
  92                      "arg2=''", name, unique);
  93         if (r < 0)
  94                 return -ENOMEM;
  95
  96         r = sd_bus_add_match(bus, NULL, match, name_owner_change_callback, e);
  97         if (r < 0)
  98                 return r;
  99
 100         r = sd_bus_release_name(bus, name);
 101         if (r < 0)
 102                 return r;
 103
 104         return 0;
 105 }
 106
 107 int bus_event_loop_with_idle(
 108                 sd_event *e,
 109                 sd_bus *bus,
 110                 const char *name,
 111                 usec_t timeout,
 112                 check_idle_t check_idle,
 113                 void *userdata) {
 114         bool exiting = false;
 115         int r, code;
 116
 117         assert(e);
 118         assert(bus);
 119         assert(name);
 120
 121         for (;;) {
 122                 bool idle;
 123
 124                 r = sd_event_get_state(e);
 125                 if (r < 0)
 126                         return r;
 127                 if (r == SD_EVENT_FINISHED)
 128                         break;
 129
 130                 if (check_idle)
 131                         idle = check_idle(userdata);
 132                 else
 133                         idle = true;
 134
 135                 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
 136                 if (r < 0)
 137                         return r;
 138
 139                 if (r == 0 && !exiting && idle) {
 140
 141                         r = sd_bus_try_close(bus);
 142                         if (r == -EBUSY)
 143                                 continue;
 144
 145                         /* Fallback for dbus1 connections: we
 146                          * unregister the name and wait for the
 147                          * response to come through for it */
 148                         if (r == -EOPNOTSUPP) {
 149
 150                                 /* Inform the service manager that we
 151                                  * are going down, so that it will
 152                                  * queue all further start requests,
 153                                  * instead of assuming we are already
 154                                  * running. */
 155                                 sd_notify(false, "STOPPING=1");
 156
 157                                 r = bus_async_unregister_and_exit(e, bus, name);
 158                                 if (r < 0)
 159                                         return r;
 160
 161                                 exiting = true;
 162                                 continue;
 163                         }
 164
 165                         if (r < 0)
 166                                 return r;
 167
 168                         sd_event_exit(e, 0);
 169                         break;
 170                 }
 171         }
 172
 173         r = sd_event_get_exit_code(e, &code);
 174         if (r < 0)
 175                 return r;
 176
 177         return code;
 178 }
 179
 180 int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
 181         _cleanup_(sd_bus_message_unrefp) sd_bus_message *rep = NULL;
 182         int r, has_owner = 0;
 183
 184         assert(c);
 185         assert(name);
 186
 187         r = sd_bus_call_method(c,
 188                                "org.freedesktop.DBus",
 189                                "/org/freedesktop/dbus",
 190                                "org.freedesktop.DBus",
 191                                "NameHasOwner",
 192                                error,
 193                                &rep,
 194                                "s",
 195                                name);
 196         if (r < 0)
 197                 return r;
 198
 199         r = sd_bus_message_read_basic(rep, 'b', &has_owner);
 200         if (r < 0)
 201                 return sd_bus_error_set_errno(error, r);
 202
 203         return has_owner;
 204 }
 205
 206 static int check_good_user(sd_bus_message *m, uid_t good_user) {
 207         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 208         uid_t sender_uid;
 209         int r;
 210
 211         assert(m);
 212
 213         if (good_user == UID_INVALID)
 214                 return 0;
 215
 216         r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
 217         if (r < 0)
 218                 return r;
 219
 220         /* Don't trust augmented credentials for authorization */
 221         assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
 222
 223         r = sd_bus_creds_get_euid(creds, &sender_uid);
 224         if (r < 0)
 225                 return r;
 226
 227         return sender_uid == good_user;
 228 }
 229
 230 int bus_test_polkit(
 231                 sd_bus_message *call,
 232                 int capability,
 233                 const char *action,
 234                 const char **details,
 235                 uid_t good_user,
 236                 bool *_challenge,
 237                 sd_bus_error *e) {
 238
 239         int r;
 240
 241         assert(call);
 242         assert(action);
 243
 244         /* Tests non-interactively! */
 245
 246         r = check_good_user(call, good_user);
 247         if (r != 0)
 248                 return r;
 249
 250         r = sd_bus_query_sender_privilege(call, capability);
 251         if (r < 0)
 252                 return r;
 253         else if (r > 0)
 254                 return 1;
 255 #ifdef ENABLE_POLKIT
 256         else {
 257                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *request = NULL;
 258                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 259                 int authorized = false, challenge = false;
 260                 const char *sender, **k, **v;
 261
 262                 sender = sd_bus_message_get_sender(call);
 263                 if (!sender)
 264                         return -EBADMSG;
 265
 266                 r = sd_bus_message_new_method_call(
 267                                 call->bus,
 268                                 &request,
 269                                 "org.freedesktop.PolicyKit1",
 270                                 "/org/freedesktop/PolicyKit1/Authority",
 271                                 "org.freedesktop.PolicyKit1.Authority",
 272                                 "CheckAuthorization");
 273                 if (r < 0)
 274                         return r;
 275
 276                 r = sd_bus_message_append(
 277                                 request,
 278                                 "(sa{sv})s",
 279                                 "system-bus-name", 1, "name", "s", sender,
 280                                 action);
 281                 if (r < 0)
 282                         return r;
 283
 284                 r = sd_bus_message_open_container(request, 'a', "{ss}");
 285                 if (r < 0)
 286                         return r;
 287
 288                 STRV_FOREACH_PAIR(k, v, details) {
 289                         r = sd_bus_message_append(request, "{ss}", *k, *v);
 290                         if (r < 0)
 291                                 return r;
 292                 }
 293
 294                 r = sd_bus_message_close_container(request);
 295                 if (r < 0)
 296                         return r;
 297
 298                 r = sd_bus_message_append(request, "us", 0, NULL);
 299                 if (r < 0)
 300                         return r;
 301
 302                 r = sd_bus_call(call->bus, request, 0, e, &reply);
 303                 if (r < 0) {
 304                         /* Treat no PK available as access denied */
 305                         if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
 306                                 sd_bus_error_free(e);
 307                                 return -EACCES;
 308                         }
 309
 310                         return r;
 311                 }
 312
 313                 r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
 314                 if (r < 0)
 315                         return r;
 316
 317                 r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
 318                 if (r < 0)
 319                         return r;
 320
 321                 if (authorized)
 322                         return 1;
 323
 324                 if (_challenge) {
 325                         *_challenge = challenge;
 326                         return 0;
 327                 }
 328         }
 329 #endif
 330
 331         return -EACCES;
 332 }
 333
 334 #ifdef ENABLE_POLKIT
 335
 336 typedef struct AsyncPolkitQuery {
 337         sd_bus_message *request, *reply;
 338         sd_bus_message_handler_t callback;
 339         void *userdata;
 340         sd_bus_slot *slot;
 341         Hashmap *registry;
 342 } AsyncPolkitQuery;
 343
 344 static void async_polkit_query_free(AsyncPolkitQuery *q) {
 345
 346         if (!q)
 347                 return;
 348
 349         sd_bus_slot_unref(q->slot);
 350
 351         if (q->registry && q->request)
 352                 hashmap_remove(q->registry, q->request);
 353
 354         sd_bus_message_unref(q->request);
 355         sd_bus_message_unref(q->reply);
 356
 357         free(q);
 358 }
 359
 360 static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
 361         _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
 362         AsyncPolkitQuery *q = userdata;
 363         int r;
 364
 365         assert(reply);
 366         assert(q);
 367
 368         q->slot = sd_bus_slot_unref(q->slot);
 369         q->reply = sd_bus_message_ref(reply);
 370
 371         r = sd_bus_message_rewind(q->request, true);
 372         if (r < 0) {
 373                 r = sd_bus_reply_method_errno(q->request, r, NULL);
 374                 goto finish;
 375         }
 376
 377         r = q->callback(q->request, q->userdata, &error_buffer);
 378         r = bus_maybe_reply_error(q->request, r, &error_buffer);
 379
 380 finish:
 381         async_polkit_query_free(q);
 382
 383         return r;
 384 }
 385
 386 #endif
 387
 388 int bus_verify_polkit_async(
 389                 sd_bus_message *call,
 390                 int capability,
 391                 const char *action,
 392                 const char **details,
 393                 bool interactive,
 394                 uid_t good_user,
 395                 Hashmap **registry,
 396                 sd_bus_error *error) {
 397
 398 #ifdef ENABLE_POLKIT
 399         _cleanup_(sd_bus_message_unrefp) sd_bus_message *pk = NULL;
 400         AsyncPolkitQuery *q;
 401         const char *sender, **k, **v;
 402         sd_bus_message_handler_t callback;
 403         void *userdata;
 404         int c;
 405 #endif
 406         int r;
 407
 408         assert(call);
 409         assert(action);
 410         assert(registry);
 411
 412         r = check_good_user(call, good_user);
 413         if (r != 0)
 414                 return r;
 415
 416 #ifdef ENABLE_POLKIT
 417         q = hashmap_get(*registry, call);
 418         if (q) {
 419                 int authorized, challenge;
 420
 421                 /* This is the second invocation of this function, and
 422                  * there's already a response from polkit, let's
 423                  * process it */
 424                 assert(q->reply);
 425
 426                 if (sd_bus_message_is_method_error(q->reply, NULL)) {
 427                         const sd_bus_error *e;
 428
 429                         /* Copy error from polkit reply */
 430                         e = sd_bus_message_get_error(q->reply);
 431                         sd_bus_error_copy(error, e);
 432
 433                         /* Treat no PK available as access denied */
 434                         if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
 435                                 return -EACCES;
 436
 437                         return -sd_bus_error_get_errno(e);
 438                 }
 439
 440                 r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
 441                 if (r >= 0)
 442                         r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
 443
 444                 if (r < 0)
 445                         return r;
 446
 447                 if (authorized)
 448                         return 1;
 449
 450                 if (challenge)
 451                         return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
 452
 453                 return -EACCES;
 454         }
 455 #endif
 456
 457         r = sd_bus_query_sender_privilege(call, capability);
 458         if (r < 0)
 459                 return r;
 460         else if (r > 0)
 461                 return 1;
 462
 463 #ifdef ENABLE_POLKIT
 464         if (sd_bus_get_current_message(call->bus) != call)
 465                 return -EINVAL;
 466
 467         callback = sd_bus_get_current_handler(call->bus);
 468         if (!callback)
 469                 return -EINVAL;
 470
 471         userdata = sd_bus_get_current_userdata(call->bus);
 472
 473         sender = sd_bus_message_get_sender(call);
 474         if (!sender)
 475                 return -EBADMSG;
 476
 477         c = sd_bus_message_get_allow_interactive_authorization(call);
 478         if (c < 0)
 479                 return c;
 480         if (c > 0)
 481                 interactive = true;
 482
 483         r = hashmap_ensure_allocated(registry, NULL);
 484         if (r < 0)
 485                 return r;
 486
 487         r = sd_bus_message_new_method_call(
 488                         call->bus,
 489                         &pk,
 490                         "org.freedesktop.PolicyKit1",
 491                         "/org/freedesktop/PolicyKit1/Authority",
 492                         "org.freedesktop.PolicyKit1.Authority",
 493                         "CheckAuthorization");
 494         if (r < 0)
 495                 return r;
 496
 497         r = sd_bus_message_append(
 498                         pk,
 499                         "(sa{sv})s",
 500                         "system-bus-name", 1, "name", "s", sender,
 501                         action);
 502         if (r < 0)
 503                 return r;
 504
 505         r = sd_bus_message_open_container(pk, 'a', "{ss}");
 506         if (r < 0)
 507                 return r;
 508
 509         STRV_FOREACH_PAIR(k, v, details) {
 510                 r = sd_bus_message_append(pk, "{ss}", *k, *v);
 511                 if (r < 0)
 512                         return r;
 513         }
 514
 515         r = sd_bus_message_close_container(pk);
 516         if (r < 0)
 517                 return r;
 518
 519         r = sd_bus_message_append(pk, "us", !!interactive, NULL);
 520         if (r < 0)
 521                 return r;
 522
 523         q = new0(AsyncPolkitQuery, 1);
 524         if (!q)
 525                 return -ENOMEM;
 526
 527         q->request = sd_bus_message_ref(call);
 528         q->callback = callback;
 529         q->userdata = userdata;
 530
 531         r = hashmap_put(*registry, call, q);
 532         if (r < 0) {
 533                 async_polkit_query_free(q);
 534                 return r;
 535         }
 536
 537         q->registry = *registry;
 538
 539         r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
 540         if (r < 0) {
 541                 async_polkit_query_free(q);
 542                 return r;
 543         }
 544
 545         return 0;
 546 #endif
 547
 548         return -EACCES;
 549 }
 550
 551 void bus_verify_polkit_async_registry_free(Hashmap *registry) {
 552 #ifdef ENABLE_POLKIT
 553         AsyncPolkitQuery *q;
 554
 555         while ((q = hashmap_steal_first(registry)))
 556                 async_polkit_query_free(q);
 557
 558         hashmap_free(registry);
 559 #endif
 560 }
 561
 562 int bus_check_peercred(sd_bus *c) {
 563         struct ucred ucred;
 564         socklen_t l;
 565         int fd;
 566
 567         assert(c);
 568
 569         fd = sd_bus_get_fd(c);
 570         if (fd < 0)
 571                 return fd;
 572
 573         l = sizeof(struct ucred);
 574         if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 575                 return -errno;
 576
 577         if (l != sizeof(struct ucred))
 578                 return -E2BIG;
 579
 580         if (ucred.uid != 0 && ucred.uid != geteuid())
 581                 return -EPERM;
 582
 583         return 1;
 584 }
 585
 586 int bus_connect_system_systemd(sd_bus **_bus) {
 587         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 588         int r;
 589
 590         assert(_bus);
 591
 592         if (geteuid() != 0)
 593                 return sd_bus_default_system(_bus);
 594
 595         /* If we are root and kdbus is not available, then let's talk
 596          * directly to the system instance, instead of going via the
 597          * bus */
 598
 599         r = sd_bus_new(&bus);
 600         if (r < 0)
 601                 return r;
 602
 603         r = sd_bus_set_address(bus, KERNEL_SYSTEM_BUS_ADDRESS);
 604         if (r < 0)
 605                 return r;
 606
 607         bus->bus_client = true;
 608
 609         r = sd_bus_start(bus);
 610         if (r >= 0) {
 611                 *_bus = bus;
 612                 bus = NULL;
 613                 return 0;
 614         }
 615
 616         bus = sd_bus_unref(bus);
 617
 618         r = sd_bus_new(&bus);
 619         if (r < 0)
 620                 return r;
 621
 622         r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
 623         if (r < 0)
 624                 return r;
 625
 626         r = sd_bus_start(bus);
 627         if (r < 0)
 628                 return sd_bus_default_system(_bus);
 629
 630         r = bus_check_peercred(bus);
 631         if (r < 0)
 632                 return r;
 633
 634         *_bus = bus;
 635         bus = NULL;
 636
 637         return 0;
 638 }
 639
 640 int bus_connect_user_systemd(sd_bus **_bus) {
 641         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 642         _cleanup_free_ char *ee = NULL;
 643         const char *e;
 644         int r;
 645
 646         /* Try via kdbus first, and then directly */
 647
 648         assert(_bus);
 649
 650         r = sd_bus_new(&bus);
 651         if (r < 0)
 652                 return r;
 653
 654         if (asprintf(&bus->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()) < 0)
 655                 return -ENOMEM;
 656
 657         bus->bus_client = true;
 658
 659         r = sd_bus_start(bus);
 660         if (r >= 0) {
 661                 *_bus = bus;
 662                 bus = NULL;
 663                 return 0;
 664         }
 665
 666         bus = sd_bus_unref(bus);
 667
 668         e = secure_getenv("XDG_RUNTIME_DIR");
 669         if (!e)
 670                 return sd_bus_default_user(_bus);
 671
 672         ee = bus_address_escape(e);
 673         if (!ee)
 674                 return -ENOMEM;
 675
 676         r = sd_bus_new(&bus);
 677         if (r < 0)
 678                 return r;
 679
 680         bus->address = strjoin("unix:path=", ee, "/systemd/private");
 681         if (!bus->address)
 682                 return -ENOMEM;
 683
 684         r = sd_bus_start(bus);
 685         if (r < 0)
 686                 return sd_bus_default_user(_bus);
 687
 688         r = bus_check_peercred(bus);
 689         if (r < 0)
 690                 return r;
 691
 692         *_bus = bus;
 693         bus = NULL;
 694
 695         return 0;
 696 }
 697
 698 #define print_property(name, fmt, ...)                                  \
 699         do {                                                            \
 700                 if (value)                                              \
 701                         printf(fmt "\n", __VA_ARGS__);                  \
 702                 else                                                    \
 703                         printf("%s=" fmt "\n", name, __VA_ARGS__);      \
 704         } while(0)
 705
 706 int bus_print_property(const char *name, sd_bus_message *property, bool value, bool all) {
 707         char type;
 708         const char *contents;
 709         int r;
 710
 711         assert(name);
 712         assert(property);
 713
 714         r = sd_bus_message_peek_type(property, &type, &contents);
 715         if (r < 0)
 716                 return r;
 717
 718         switch (type) {
 719
 720         case SD_BUS_TYPE_STRING: {
 721                 const char *s;
 722
 723                 r = sd_bus_message_read_basic(property, type, &s);
 724                 if (r < 0)
 725                         return r;
 726
 727                 if (all || !isempty(s)) {
 728                         _cleanup_free_ char *escaped = NULL;
 729
 730                         escaped = xescape(s, "\n");
 731                         if (!escaped)
 732                                 return -ENOMEM;
 733
 734                         print_property(name, "%s", escaped);
 735                 }
 736
 737                 return 1;
 738         }
 739
 740         case SD_BUS_TYPE_BOOLEAN: {
 741                 int b;
 742
 743                 r = sd_bus_message_read_basic(property, type, &b);
 744                 if (r < 0)
 745                         return r;
 746
 747                 print_property(name, "%s", yes_no(b));
 748
 749                 return 1;
 750         }
 751
 752         case SD_BUS_TYPE_UINT64: {
 753                 uint64_t u;
 754
 755                 r = sd_bus_message_read_basic(property, type, &u);
 756                 if (r < 0)
 757                         return r;
 758
 759                 /* Yes, heuristics! But we can change this check
 760                  * should it turn out to not be sufficient */
 761
 762                 if (endswith(name, "Timestamp")) {
 763                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
 764
 765                         t = format_timestamp(timestamp, sizeof(timestamp), u);
 766                         if (t || all)
 767                                 print_property(name, "%s", strempty(t));
 768
 769                 } else if (strstr(name, "USec")) {
 770                         char timespan[FORMAT_TIMESPAN_MAX];
 771
 772                         print_property(name, "%s", format_timespan(timespan, sizeof(timespan), u, 0));
 773                 } else if (streq(name, "RestrictNamespaces")) {
 774                         _cleanup_free_ char *s = NULL;
 775                         const char *result = NULL;
 776
 777                         if ((u & NAMESPACE_FLAGS_ALL) == 0)
 778                                 result = "yes";
 779                         else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
 780                                 result = "no";
 781                         else {
 782                                 r = namespace_flag_to_string_many(u, &s);
 783                                 if (r < 0)
 784                                         return r;
 785
 786                                 result = s;
 787                         }
 788
 789                         print_property(name, "%s", result);
 790                 } else
 791                         print_property(name, "%"PRIu64, u);
 792
 793                 return 1;
 794         }
 795
 796         case SD_BUS_TYPE_INT64: {
 797                 int64_t i;
 798
 799                 r = sd_bus_message_read_basic(property, type, &i);
 800                 if (r < 0)
 801                         return r;
 802
 803                 print_property(name, "%"PRIi64, i);
 804
 805                 return 1;
 806         }
 807
 808         case SD_BUS_TYPE_UINT32: {
 809                 uint32_t u;
 810
 811                 r = sd_bus_message_read_basic(property, type, &u);
 812                 if (r < 0)
 813                         return r;
 814
 815                 if (strstr(name, "UMask") || strstr(name, "Mode"))
 816                         print_property(name, "%04o", u);
 817                 else
 818                         print_property(name, "%"PRIu32, u);
 819
 820                 return 1;
 821         }
 822
 823         case SD_BUS_TYPE_INT32: {
 824                 int32_t i;
 825
 826                 r = sd_bus_message_read_basic(property, type, &i);
 827                 if (r < 0)
 828                         return r;
 829
 830                 print_property(name, "%"PRIi32, i);
 831                 return 1;
 832         }
 833
 834         case SD_BUS_TYPE_DOUBLE: {
 835                 double d;
 836
 837                 r = sd_bus_message_read_basic(property, type, &d);
 838                 if (r < 0)
 839                         return r;
 840
 841                 print_property(name, "%g", d);
 842                 return 1;
 843         }
 844
 845         case SD_BUS_TYPE_ARRAY:
 846                 if (streq(contents, "s")) {
 847                         bool first = true;
 848                         const char *str;
 849
 850                         r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
 851                         if (r < 0)
 852                                 return r;
 853
 854                         while ((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
 855                                 _cleanup_free_ char *escaped = NULL;
 856
 857                                 if (first && !value)
 858                                         printf("%s=", name);
 859
 860                                 escaped = xescape(str, "\n ");
 861                                 if (!escaped)
 862                                         return -ENOMEM;
 863
 864                                 printf("%s%s", first ? "" : " ", escaped);
 865
 866                                 first = false;
 867                         }
 868                         if (r < 0)
 869                                 return r;
 870
 871                         if (first && all && !value)
 872                                 printf("%s=", name);
 873                         if (!first || all)
 874                                 puts("");
 875
 876                         r = sd_bus_message_exit_container(property);
 877                         if (r < 0)
 878                                 return r;
 879
 880                         return 1;
 881
 882                 } else if (streq(contents, "y")) {
 883                         const uint8_t *u;
 884                         size_t n;
 885
 886                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
 887                         if (r < 0)
 888                                 return r;
 889
 890                         if (all || n > 0) {
 891                                 unsigned int i;
 892
 893                                 if (!value)
 894                                         printf("%s=", name);
 895
 896                                 for (i = 0; i < n; i++)
 897                                         printf("%02x", u[i]);
 898
 899                                 puts("");
 900                         }
 901
 902                         return 1;
 903
 904                 } else if (streq(contents, "u")) {
 905                         uint32_t *u;
 906                         size_t n;
 907
 908                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
 909                         if (r < 0)
 910                                 return r;
 911
 912                         if (all || n > 0) {
 913                                 unsigned int i;
 914
 915                                 if (!value)
 916                                         printf("%s=", name);
 917
 918                                 for (i = 0; i < n; i++)
 919                                         printf("%08x", u[i]);
 920
 921                                 puts("");
 922                         }
 923
 924                         return 1;
 925                 }
 926
 927                 break;
 928         }
 929
 930         return 0;
 931 }
 932
 933 int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool value, bool all) {
 934         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 935         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 936         int r;
 937
 938         assert(bus);
 939         assert(path);
 940
 941         r = sd_bus_call_method(bus,
 942                         dest,
 943                         path,
 944                         "org.freedesktop.DBus.Properties",
 945                         "GetAll",
 946                         &error,
 947                         &reply,
 948                         "s", "");
 949         if (r < 0)
 950                 return r;
 951
 952         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
 953         if (r < 0)
 954                 return r;
 955
 956         while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
 957                 const char *name;
 958                 const char *contents;
 959
 960                 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
 961                 if (r < 0)
 962                         return r;
 963
 964                 if (!filter || strv_find(filter, name)) {
 965                         r = sd_bus_message_peek_type(reply, NULL, &contents);
 966                         if (r < 0)
 967                                 return r;
 968
 969                         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
 970                         if (r < 0)
 971                                 return r;
 972
 973                         r = bus_print_property(name, reply, value, all);
 974                         if (r < 0)
 975                                 return r;
 976                         if (r == 0) {
 977                                 if (all)
 978                                         printf("%s=[unprintable]\n", name);
 979                                 /* skip what we didn't read */
 980                                 r = sd_bus_message_skip(reply, contents);
 981                                 if (r < 0)
 982                                         return r;
 983                         }
 984
 985                         r = sd_bus_message_exit_container(reply);
 986                         if (r < 0)
 987                                 return r;
 988                 } else {
 989                         r = sd_bus_message_skip(reply, "v");
 990                         if (r < 0)
 991                                 return r;
 992                 }
 993
 994                 r = sd_bus_message_exit_container(reply);
 995                 if (r < 0)
 996                         return r;
 997         }
 998         if (r < 0)
 999                 return r;
1000
1001         r = sd_bus_message_exit_container(reply);
1002         if (r < 0)
1003                 return r;
1004
1005         return 0;
1006 }
1007
1008 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1009         sd_id128_t *p = userdata;
1010         const void *v;
1011         size_t n;
1012         int r;
1013
1014         r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1015         if (r < 0)
1016                 return r;
1017
1018         if (n == 0)
1019                 *p = SD_ID128_NULL;
1020         else if (n == 16)
1021                 memcpy((*p).bytes, v, n);
1022         else
1023                 return -EINVAL;
1024
1025         return 0;
1026 }
1027
1028 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1029         char type;
1030         int r;
1031
1032         r = sd_bus_message_peek_type(m, &type, NULL);
1033         if (r < 0)
1034                 return r;
1035
1036         switch (type) {
1037
1038         case SD_BUS_TYPE_STRING: {
1039                 char **p = userdata;
1040                 const char *s;
1041
1042                 r = sd_bus_message_read_basic(m, type, &s);
1043                 if (r < 0)
1044                         return r;
1045
1046                 if (isempty(s))
1047                         s = NULL;
1048
1049                 return free_and_strdup(p, s);
1050         }
1051
1052         case SD_BUS_TYPE_ARRAY: {
1053                 _cleanup_strv_free_ char **l = NULL;
1054                 char ***p = userdata;
1055
1056                 r = bus_message_read_strv_extend(m, &l);
1057                 if (r < 0)
1058                         return r;
1059
1060                 strv_free(*p);
1061                 *p = l;
1062                 l = NULL;
1063                 return 0;
1064         }
1065
1066         case SD_BUS_TYPE_BOOLEAN: {
1067                 unsigned b;
1068                 int *p = userdata;
1069
1070                 r = sd_bus_message_read_basic(m, type, &b);
1071                 if (r < 0)
1072                         return r;
1073
1074                 *p = b;
1075                 return 0;
1076         }
1077
1078         case SD_BUS_TYPE_INT32:
1079         case SD_BUS_TYPE_UINT32: {
1080                 uint32_t u, *p = userdata;
1081
1082                 r = sd_bus_message_read_basic(m, type, &u);
1083                 if (r < 0)
1084                         return r;
1085
1086                 *p = u;
1087                 return 0;
1088         }
1089
1090         case SD_BUS_TYPE_INT64:
1091         case SD_BUS_TYPE_UINT64: {
1092                 uint64_t t, *p = userdata;
1093
1094                 r = sd_bus_message_read_basic(m, type, &t);
1095                 if (r < 0)
1096                         return r;
1097
1098                 *p = t;
1099                 return 0;
1100         }
1101
1102         case SD_BUS_TYPE_DOUBLE: {
1103                 double d, *p = userdata;
1104
1105                 r = sd_bus_message_read_basic(m, type, &d);
1106                 if (r < 0)
1107                         return r;
1108
1109                 *p = d;
1110                 return 0;
1111         }}
1112
1113         return -EOPNOTSUPP;
1114 }
1115
1116 int bus_message_map_all_properties(
1117                 sd_bus_message *m,
1118                 const struct bus_properties_map *map,
1119                 void *userdata) {
1120
1121         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1122         int r;
1123
1124         assert(m);
1125         assert(map);
1126
1127         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1128         if (r < 0)
1129                 return r;
1130
1131         while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1132                 const struct bus_properties_map *prop;
1133                 const char *member;
1134                 const char *contents;
1135                 void *v;
1136                 unsigned i;
1137
1138                 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1139                 if (r < 0)
1140                         return r;
1141
1142                 for (i = 0, prop = NULL; map[i].member; i++)
1143                         if (streq(map[i].member, member)) {
1144                                 prop = &map[i];
1145                                 break;
1146                         }
1147
1148                 if (prop) {
1149                         r = sd_bus_message_peek_type(m, NULL, &contents);
1150                         if (r < 0)
1151                                 return r;
1152
1153                         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1154                         if (r < 0)
1155                                 return r;
1156
1157                         v = (uint8_t *)userdata + prop->offset;
1158                         if (map[i].set)
1159                                 r = prop->set(sd_bus_message_get_bus(m), member, m, &error, v);
1160                         else
1161                                 r = map_basic(sd_bus_message_get_bus(m), member, m, &error, v);
1162                         if (r < 0)
1163                                 return r;
1164
1165                         r = sd_bus_message_exit_container(m);
1166                         if (r < 0)
1167                                 return r;
1168                 } else {
1169                         r = sd_bus_message_skip(m, "v");
1170                         if (r < 0)
1171                                 return r;
1172                 }
1173
1174                 r = sd_bus_message_exit_container(m);
1175                 if (r < 0)
1176                         return r;
1177         }
1178         if (r < 0)
1179                 return r;
1180
1181         return sd_bus_message_exit_container(m);
1182 }
1183
1184 int bus_message_map_properties_changed(
1185                 sd_bus_message *m,
1186                 const struct bus_properties_map *map,
1187                 void *userdata) {
1188
1189         const char *member;
1190         int r, invalidated, i;
1191
1192         assert(m);
1193         assert(map);
1194
1195         r = bus_message_map_all_properties(m, map, userdata);
1196         if (r < 0)
1197                 return r;
1198
1199         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1200         if (r < 0)
1201                 return r;
1202
1203         invalidated = 0;
1204         while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1205                 for (i = 0; map[i].member; i++)
1206                         if (streq(map[i].member, member)) {
1207                                 ++invalidated;
1208                                 break;
1209                         }
1210         if (r < 0)
1211                 return r;
1212
1213         r = sd_bus_message_exit_container(m);
1214         if (r < 0)
1215                 return r;
1216
1217         return invalidated;
1218 }
1219
1220 int bus_map_all_properties(
1221                 sd_bus *bus,
1222                 const char *destination,
1223                 const char *path,
1224                 const struct bus_properties_map *map,
1225                 void *userdata) {
1226
1227         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1228         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1229         int r;
1230
1231         assert(bus);
1232         assert(destination);
1233         assert(path);
1234         assert(map);
1235
1236         r = sd_bus_call_method(
1237                         bus,
1238                         destination,
1239                         path,
1240                         "org.freedesktop.DBus.Properties",
1241                         "GetAll",
1242                         &error,
1243                         &m,
1244                         "s", "");
1245         if (r < 0)
1246                 return r;
1247
1248         return bus_message_map_all_properties(m, map, userdata);
1249 }
1250
1251 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
1252         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1253         int r;
1254
1255         assert(transport >= 0);
1256         assert(transport < _BUS_TRANSPORT_MAX);
1257         assert(ret);
1258
1259         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1260         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1261
1262         switch (transport) {
1263
1264         case BUS_TRANSPORT_LOCAL:
1265                 if (user)
1266                         r = sd_bus_default_user(&bus);
1267                 else
1268                         r = sd_bus_default_system(&bus);
1269
1270                 break;
1271
1272         case BUS_TRANSPORT_REMOTE:
1273                 r = sd_bus_open_system_remote(&bus, host);
1274                 break;
1275
1276         case BUS_TRANSPORT_MACHINE:
1277                 r = sd_bus_open_system_machine(&bus, host);
1278                 break;
1279
1280         default:
1281                 assert_not_reached("Hmm, unknown transport type.");
1282         }
1283         if (r < 0)
1284                 return r;
1285
1286         r = sd_bus_set_exit_on_disconnect(bus, true);
1287         if (r < 0)
1288                 return r;
1289
1290         *ret = bus;
1291         bus = NULL;
1292
1293         return 0;
1294 }
1295
1296 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1297         int r;
1298
1299         assert(transport >= 0);
1300         assert(transport < _BUS_TRANSPORT_MAX);
1301         assert(bus);
1302
1303         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1304         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1305
1306         switch (transport) {
1307
1308         case BUS_TRANSPORT_LOCAL:
1309                 if (user)
1310                         r = bus_connect_user_systemd(bus);
1311                 else
1312                         r = bus_connect_system_systemd(bus);
1313
1314                 break;
1315
1316         case BUS_TRANSPORT_REMOTE:
1317                 r = sd_bus_open_system_remote(bus, host);
1318                 break;
1319
1320         case BUS_TRANSPORT_MACHINE:
1321                 r = sd_bus_open_system_machine(bus, host);
1322                 break;
1323
1324         default:
1325                 assert_not_reached("Hmm, unknown transport type.");
1326         }
1327
1328         return r;
1329 }
1330
1331 int bus_property_get_bool(
1332                 sd_bus *bus,
1333                 const char *path,
1334                 const char *interface,
1335                 const char *property,
1336                 sd_bus_message *reply,
1337                 void *userdata,
1338                 sd_bus_error *error) {
1339
1340         int b = *(bool*) userdata;
1341
1342         return sd_bus_message_append_basic(reply, 'b', &b);
1343 }
1344
1345 int bus_property_get_id128(
1346                 sd_bus *bus,
1347                 const char *path,
1348                 const char *interface,
1349                 const char *property,
1350                 sd_bus_message *reply,
1351                 void *userdata,
1352                 sd_bus_error *error) {
1353
1354         sd_id128_t *id = userdata;
1355
1356         if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
1357                 return sd_bus_message_append(reply, "ay", 0);
1358         else
1359                 return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
1360 }
1361
1362 #if __SIZEOF_SIZE_T__ != 8
1363 int bus_property_get_size(
1364                 sd_bus *bus,
1365                 const char *path,
1366                 const char *interface,
1367                 const char *property,
1368                 sd_bus_message *reply,
1369                 void *userdata,
1370                 sd_bus_error *error) {
1371
1372         uint64_t sz = *(size_t*) userdata;
1373
1374         return sd_bus_message_append_basic(reply, 't', &sz);
1375 }
1376 #endif
1377
1378 #if __SIZEOF_LONG__ != 8
1379 int bus_property_get_long(
1380                 sd_bus *bus,
1381                 const char *path,
1382                 const char *interface,
1383                 const char *property,
1384                 sd_bus_message *reply,
1385                 void *userdata,
1386                 sd_bus_error *error) {
1387
1388         int64_t l = *(long*) userdata;
1389
1390         return sd_bus_message_append_basic(reply, 'x', &l);
1391 }
1392
1393 int bus_property_get_ulong(
1394                 sd_bus *bus,
1395                 const char *path,
1396                 const char *interface,
1397                 const char *property,
1398                 sd_bus_message *reply,
1399                 void *userdata,
1400                 sd_bus_error *error) {
1401
1402         uint64_t ul = *(unsigned long*) userdata;
1403
1404         return sd_bus_message_append_basic(reply, 't', &ul);
1405 }
1406 #endif
1407
1408 int bus_log_parse_error(int r) {
1409         return log_error_errno(r, "Failed to parse bus message: %m");
1410 }
1411
1412 int bus_log_create_error(int r) {
1413         return log_error_errno(r, "Failed to create bus message: %m");
1414 }
1415
1416 /**
1417  * bus_path_encode_unique() - encode unique object path
1418  * @b: bus connection or NULL
1419  * @prefix: object path prefix
1420  * @sender_id: unique-name of client, or NULL
1421  * @external_id: external ID to be chosen by client, or NULL
1422  * @ret_path: storage for encoded object path pointer
1423  *
1424  * Whenever we provide a bus API that allows clients to create and manage
1425  * server-side objects, we need to provide a unique name for these objects. If
1426  * we let the server choose the name, we suffer from a race condition: If a
1427  * client creates an object asynchronously, it cannot destroy that object until
1428  * it received the method reply. It cannot know the name of the new object,
1429  * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1430  *
1431  * Therefore, many APIs allow the client to choose the unique name for newly
1432  * created objects. There're two problems to solve, though:
1433  *    1) Object names are usually defined via dbus object paths, which are
1434  *       usually globally namespaced. Therefore, multiple clients must be able
1435  *       to choose unique object names without interference.
1436  *    2) If multiple libraries share the same bus connection, they must be
1437  *       able to choose unique object names without interference.
1438  * The first problem is solved easily by prefixing a name with the
1439  * unique-bus-name of a connection. The server side must enforce this and
1440  * reject any other name. The second problem is solved by providing unique
1441  * suffixes from within sd-bus.
1442  *
1443  * This helper allows clients to create unique object-paths. It uses the
1444  * template '/prefix/sender_id/external_id' and returns the new path in
1445  * @ret_path (must be freed by the caller).
1446  * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1447  * NULL, this function allocates a unique suffix via @b (by requesting a new
1448  * cookie). If both @sender_id and @external_id are given, @b can be passed as
1449  * NULL.
1450  *
1451  * Returns: 0 on success, negative error code on failure.
1452  */
1453 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1454         _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1455         char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1456         int r;
1457
1458         assert_return(b || (sender_id && external_id), -EINVAL);
1459         assert_return(object_path_is_valid(prefix), -EINVAL);
1460         assert_return(ret_path, -EINVAL);
1461
1462         if (!sender_id) {
1463                 r = sd_bus_get_unique_name(b, &sender_id);
1464                 if (r < 0)
1465                         return r;
1466         }
1467
1468         if (!external_id) {
1469                 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1470                 external_id = external_buf;
1471         }
1472
1473         sender_label = bus_label_escape(sender_id);
1474         if (!sender_label)
1475                 return -ENOMEM;
1476
1477         external_label = bus_label_escape(external_id);
1478         if (!external_label)
1479                 return -ENOMEM;
1480
1481         p = strjoin(prefix, "/", sender_label, "/", external_label);
1482         if (!p)
1483                 return -ENOMEM;
1484
1485         *ret_path = p;
1486         return 0;
1487 }
1488
1489 /**
1490  * bus_path_decode_unique() - decode unique object path
1491  * @path: object path to decode
1492  * @prefix: object path prefix
1493  * @ret_sender: output parameter for sender-id label
1494  * @ret_external: output parameter for external-id label
1495  *
1496  * This does the reverse of bus_path_encode_unique() (see its description for
1497  * details). Both trailing labels, sender-id and external-id, are unescaped and
1498  * returned in the given output parameters (the caller must free them).
1499  *
1500  * Note that this function returns 0 if the path does not match the template
1501  * (see bus_path_encode_unique()), 1 if it matched.
1502  *
1503  * Returns: Negative error code on failure, 0 if the given object path does not
1504  *          match the template (return parameters are set to NULL), 1 if it was
1505  *          parsed successfully (return parameters contain allocated labels).
1506  */
1507 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1508         const char *p, *q;
1509         char *sender, *external;
1510
1511         assert(object_path_is_valid(path));
1512         assert(object_path_is_valid(prefix));
1513         assert(ret_sender);
1514         assert(ret_external);
1515
1516         p = object_path_startswith(path, prefix);
1517         if (!p) {
1518                 *ret_sender = NULL;
1519                 *ret_external = NULL;
1520                 return 0;
1521         }
1522
1523         q = strchr(p, '/');
1524         if (!q) {
1525                 *ret_sender = NULL;
1526                 *ret_external = NULL;
1527                 return 0;
1528         }
1529
1530         sender = bus_label_unescape_n(p, q - p);
1531         external = bus_label_unescape(q + 1);
1532         if (!sender || !external) {
1533                 free(sender);
1534                 free(external);
1535                 return -ENOMEM;
1536         }
1537
1538         *ret_sender = sender;
1539         *ret_external = external;
1540         return 1;
1541 }
1542
1543 int bus_property_get_rlimit(
1544                 sd_bus *bus,
1545                 const char *path,
1546                 const char *interface,
1547                 const char *property,
1548                 sd_bus_message *reply,
1549                 void *userdata,
1550                 sd_bus_error *error) {
1551
1552         struct rlimit *rl;
1553         uint64_t u;
1554         rlim_t x;
1555         const char *is_soft;
1556
1557         assert(bus);
1558         assert(reply);
1559         assert(userdata);
1560
1561         is_soft = endswith(property, "Soft");
1562         rl = *(struct rlimit**) userdata;
1563         if (rl)
1564                 x = is_soft ? rl->rlim_cur : rl->rlim_max;
1565         else {
1566                 struct rlimit buf = {};
1567                 int z;
1568                 const char *s;
1569
1570                 s = is_soft ? strndupa(property, is_soft - property) : property;
1571
1572                 z = rlimit_from_string(strstr(s, "Limit"));
1573                 assert(z >= 0);
1574
1575                 getrlimit(z, &buf);
1576                 x = is_soft ? buf.rlim_cur : buf.rlim_max;
1577         }
1578
1579         /* rlim_t might have different sizes, let's map
1580          * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
1581          * all archs */
1582         u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
1583
1584         return sd_bus_message_append(reply, "t", u);
1585 }
1586
1587 int bus_track_add_name_many(sd_bus_track *t, char **l) {
1588         int r = 0;
1589         char **i;
1590
1591         assert(t);
1592
1593         /* Continues adding after failure, and returns the first failure. */
1594
1595         STRV_FOREACH(i, l) {
1596                 int k;
1597
1598                 k = sd_bus_track_add_name(t, *i);
1599                 if (k < 0 && r >= 0)
1600                         r = k;
1601         }
1602
1603         return r;
1604 }