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 #if 0 /// UNNEEDED by elogind
  55 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  56         sd_event *e = userdata;
  57
  58         assert(m);
  59         assert(e);
  60
  61         sd_bus_close(sd_bus_message_get_bus(m));
  62         sd_event_exit(e, 0);
  63
  64         return 1;
  65 }
  66
  67 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
  68         _cleanup_free_ char *match = NULL;
  69         const char *unique;
  70         int r;
  71
  72         assert(e);
  73         assert(bus);
  74         assert(name);
  75
  76         /* We unregister the name here and then wait for the
  77          * NameOwnerChanged signal for this event to arrive before we
  78          * quit. We do this in order to make sure that any queued
  79          * requests are still processed before we really exit. */
  80
  81         r = sd_bus_get_unique_name(bus, &unique);
  82         if (r < 0)
  83                 return r;
  84
  85         r = asprintf(&match,
  86                      "sender='org.freedesktop.DBus',"
  87                      "type='signal',"
  88                      "interface='org.freedesktop.DBus',"
  89                      "member='NameOwnerChanged',"
  90                      "path='/org/freedesktop/DBus',"
  91                      "arg0='%s',"
  92                      "arg1='%s',"
  93                      "arg2=''", name, unique);
  94         if (r < 0)
  95                 return -ENOMEM;
  96
  97         r = sd_bus_add_match(bus, NULL, match, name_owner_change_callback, e);
  98         if (r < 0)
  99                 return r;
 100
 101         r = sd_bus_release_name(bus, name);
 102         if (r < 0)
 103                 return r;
 104
 105         return 0;
 106 }
 107
 108 int bus_event_loop_with_idle(
 109                 sd_event *e,
 110                 sd_bus *bus,
 111                 const char *name,
 112                 usec_t timeout,
 113                 check_idle_t check_idle,
 114                 void *userdata) {
 115         bool exiting = false;
 116         int r, code;
 117
 118         assert(e);
 119         assert(bus);
 120         assert(name);
 121
 122         for (;;) {
 123                 bool idle;
 124
 125                 r = sd_event_get_state(e);
 126                 if (r < 0)
 127                         return r;
 128                 if (r == SD_EVENT_FINISHED)
 129                         break;
 130
 131                 if (check_idle)
 132                         idle = check_idle(userdata);
 133                 else
 134                         idle = true;
 135
 136                 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
 137                 if (r < 0)
 138                         return r;
 139
 140                 if (r == 0 && !exiting && idle) {
 141
 142                         r = sd_bus_try_close(bus);
 143                         if (r == -EBUSY)
 144                                 continue;
 145
 146                         /* Fallback for dbus1 connections: we
 147                          * unregister the name and wait for the
 148                          * response to come through for it */
 149                         if (r == -EOPNOTSUPP) {
 150
 151                                 /* Inform the service manager that we
 152                                  * are going down, so that it will
 153                                  * queue all further start requests,
 154                                  * instead of assuming we are already
 155                                  * running. */
 156                                 sd_notify(false, "STOPPING=1");
 157
 158                                 r = bus_async_unregister_and_exit(e, bus, name);
 159                                 if (r < 0)
 160                                         return r;
 161
 162                                 exiting = true;
 163                                 continue;
 164                         }
 165
 166                         if (r < 0)
 167                                 return r;
 168
 169                         sd_event_exit(e, 0);
 170                         break;
 171                 }
 172         }
 173
 174         r = sd_event_get_exit_code(e, &code);
 175         if (r < 0)
 176                 return r;
 177
 178         return code;
 179 }
 180 #endif // 0
 181
 182 int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
 183         _cleanup_(sd_bus_message_unrefp) sd_bus_message *rep = NULL;
 184         int r, has_owner = 0;
 185
 186         assert(c);
 187         assert(name);
 188
 189         r = sd_bus_call_method(c,
 190                                "org.freedesktop.DBus",
 191                                "/org/freedesktop/dbus",
 192                                "org.freedesktop.DBus",
 193                                "NameHasOwner",
 194                                error,
 195                                &rep,
 196                                "s",
 197                                name);
 198         if (r < 0)
 199                 return r;
 200
 201         r = sd_bus_message_read_basic(rep, 'b', &has_owner);
 202         if (r < 0)
 203                 return sd_bus_error_set_errno(error, r);
 204
 205         return has_owner;
 206 }
 207
 208 static int check_good_user(sd_bus_message *m, uid_t good_user) {
 209         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 210         uid_t sender_uid;
 211         int r;
 212
 213         assert(m);
 214
 215         if (good_user == UID_INVALID)
 216                 return 0;
 217
 218         r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
 219         if (r < 0)
 220                 return r;
 221
 222         /* Don't trust augmented credentials for authorization */
 223         assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
 224
 225         r = sd_bus_creds_get_euid(creds, &sender_uid);
 226         if (r < 0)
 227                 return r;
 228
 229         return sender_uid == good_user;
 230 }
 231
 232 int bus_test_polkit(
 233                 sd_bus_message *call,
 234                 int capability,
 235                 const char *action,
 236                 const char **details,
 237                 uid_t good_user,
 238                 bool *_challenge,
 239                 sd_bus_error *e) {
 240
 241         int r;
 242
 243         assert(call);
 244         assert(action);
 245
 246         /* Tests non-interactively! */
 247
 248         r = check_good_user(call, good_user);
 249         if (r != 0)
 250                 return r;
 251
 252         r = sd_bus_query_sender_privilege(call, capability);
 253         if (r < 0)
 254                 return r;
 255         else if (r > 0)
 256                 return 1;
 257 #ifdef ENABLE_POLKIT
 258         else {
 259                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *request = NULL;
 260                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 261                 int authorized = false, challenge = false;
 262                 const char *sender, **k, **v;
 263
 264                 sender = sd_bus_message_get_sender(call);
 265                 if (!sender)
 266                         return -EBADMSG;
 267
 268                 r = sd_bus_message_new_method_call(
 269                                 call->bus,
 270                                 &request,
 271                                 "org.freedesktop.PolicyKit1",
 272                                 "/org/freedesktop/PolicyKit1/Authority",
 273                                 "org.freedesktop.PolicyKit1.Authority",
 274                                 "CheckAuthorization");
 275                 if (r < 0)
 276                         return r;
 277
 278                 r = sd_bus_message_append(
 279                                 request,
 280                                 "(sa{sv})s",
 281                                 "system-bus-name", 1, "name", "s", sender,
 282                                 action);
 283                 if (r < 0)
 284                         return r;
 285
 286                 r = sd_bus_message_open_container(request, 'a', "{ss}");
 287                 if (r < 0)
 288                         return r;
 289
 290                 STRV_FOREACH_PAIR(k, v, details) {
 291                         r = sd_bus_message_append(request, "{ss}", *k, *v);
 292                         if (r < 0)
 293                                 return r;
 294                 }
 295
 296                 r = sd_bus_message_close_container(request);
 297                 if (r < 0)
 298                         return r;
 299
 300                 r = sd_bus_message_append(request, "us", 0, NULL);
 301                 if (r < 0)
 302                         return r;
 303
 304                 r = sd_bus_call(call->bus, request, 0, e, &reply);
 305                 if (r < 0) {
 306                         /* Treat no PK available as access denied */
 307                         if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
 308                                 sd_bus_error_free(e);
 309                                 return -EACCES;
 310                         }
 311
 312                         return r;
 313                 }
 314
 315                 r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
 316                 if (r < 0)
 317                         return r;
 318
 319                 r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
 320                 if (r < 0)
 321                         return r;
 322
 323                 if (authorized)
 324                         return 1;
 325
 326                 if (_challenge) {
 327                         *_challenge = challenge;
 328                         return 0;
 329                 }
 330         }
 331 #endif
 332
 333         return -EACCES;
 334 }
 335
 336 #ifdef ENABLE_POLKIT
 337
 338 typedef struct AsyncPolkitQuery {
 339         sd_bus_message *request, *reply;
 340         sd_bus_message_handler_t callback;
 341         void *userdata;
 342         sd_bus_slot *slot;
 343         Hashmap *registry;
 344 } AsyncPolkitQuery;
 345
 346 static void async_polkit_query_free(AsyncPolkitQuery *q) {
 347
 348         if (!q)
 349                 return;
 350
 351         sd_bus_slot_unref(q->slot);
 352
 353         if (q->registry && q->request)
 354                 hashmap_remove(q->registry, q->request);
 355
 356         sd_bus_message_unref(q->request);
 357         sd_bus_message_unref(q->reply);
 358
 359         free(q);
 360 }
 361
 362 static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
 363         _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
 364         AsyncPolkitQuery *q = userdata;
 365         int r;
 366
 367         assert(reply);
 368         assert(q);
 369
 370         q->slot = sd_bus_slot_unref(q->slot);
 371         q->reply = sd_bus_message_ref(reply);
 372
 373         r = sd_bus_message_rewind(q->request, true);
 374         if (r < 0) {
 375                 r = sd_bus_reply_method_errno(q->request, r, NULL);
 376                 goto finish;
 377         }
 378
 379         r = q->callback(q->request, q->userdata, &error_buffer);
 380         r = bus_maybe_reply_error(q->request, r, &error_buffer);
 381
 382 finish:
 383         async_polkit_query_free(q);
 384
 385         return r;
 386 }
 387
 388 #endif
 389
 390 int bus_verify_polkit_async(
 391                 sd_bus_message *call,
 392                 int capability,
 393                 const char *action,
 394                 const char **details,
 395                 bool interactive,
 396                 uid_t good_user,
 397                 Hashmap **registry,
 398                 sd_bus_error *error) {
 399
 400 #ifdef ENABLE_POLKIT
 401         _cleanup_(sd_bus_message_unrefp) sd_bus_message *pk = NULL;
 402         AsyncPolkitQuery *q;
 403         const char *sender, **k, **v;
 404         sd_bus_message_handler_t callback;
 405         void *userdata;
 406         int c;
 407 #endif
 408         int r;
 409
 410         assert(call);
 411         assert(action);
 412         assert(registry);
 413
 414         r = check_good_user(call, good_user);
 415         if (r != 0)
 416                 return r;
 417
 418 #ifdef ENABLE_POLKIT
 419         q = hashmap_get(*registry, call);
 420         if (q) {
 421                 int authorized, challenge;
 422
 423                 /* This is the second invocation of this function, and
 424                  * there's already a response from polkit, let's
 425                  * process it */
 426                 assert(q->reply);
 427
 428                 if (sd_bus_message_is_method_error(q->reply, NULL)) {
 429                         const sd_bus_error *e;
 430
 431                         /* Copy error from polkit reply */
 432                         e = sd_bus_message_get_error(q->reply);
 433                         sd_bus_error_copy(error, e);
 434
 435                         /* Treat no PK available as access denied */
 436                         if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
 437                                 return -EACCES;
 438
 439                         return -sd_bus_error_get_errno(e);
 440                 }
 441
 442                 r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
 443                 if (r >= 0)
 444                         r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
 445
 446                 if (r < 0)
 447                         return r;
 448
 449                 if (authorized)
 450                         return 1;
 451
 452                 if (challenge)
 453                         return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
 454
 455                 return -EACCES;
 456         }
 457 #endif
 458
 459         r = sd_bus_query_sender_privilege(call, capability);
 460         if (r < 0)
 461                 return r;
 462         else if (r > 0)
 463                 return 1;
 464
 465 #ifdef ENABLE_POLKIT
 466         if (sd_bus_get_current_message(call->bus) != call)
 467                 return -EINVAL;
 468
 469         callback = sd_bus_get_current_handler(call->bus);
 470         if (!callback)
 471                 return -EINVAL;
 472
 473         userdata = sd_bus_get_current_userdata(call->bus);
 474
 475         sender = sd_bus_message_get_sender(call);
 476         if (!sender)
 477                 return -EBADMSG;
 478
 479         c = sd_bus_message_get_allow_interactive_authorization(call);
 480         if (c < 0)
 481                 return c;
 482         if (c > 0)
 483                 interactive = true;
 484
 485         r = hashmap_ensure_allocated(registry, NULL);
 486         if (r < 0)
 487                 return r;
 488
 489         r = sd_bus_message_new_method_call(
 490                         call->bus,
 491                         &pk,
 492                         "org.freedesktop.PolicyKit1",
 493                         "/org/freedesktop/PolicyKit1/Authority",
 494                         "org.freedesktop.PolicyKit1.Authority",
 495                         "CheckAuthorization");
 496         if (r < 0)
 497                 return r;
 498
 499         r = sd_bus_message_append(
 500                         pk,
 501                         "(sa{sv})s",
 502                         "system-bus-name", 1, "name", "s", sender,
 503                         action);
 504         if (r < 0)
 505                 return r;
 506
 507         r = sd_bus_message_open_container(pk, 'a', "{ss}");
 508         if (r < 0)
 509                 return r;
 510
 511         STRV_FOREACH_PAIR(k, v, details) {
 512                 r = sd_bus_message_append(pk, "{ss}", *k, *v);
 513                 if (r < 0)
 514                         return r;
 515         }
 516
 517         r = sd_bus_message_close_container(pk);
 518         if (r < 0)
 519                 return r;
 520
 521         r = sd_bus_message_append(pk, "us", !!interactive, NULL);
 522         if (r < 0)
 523                 return r;
 524
 525         q = new0(AsyncPolkitQuery, 1);
 526         if (!q)
 527                 return -ENOMEM;
 528
 529         q->request = sd_bus_message_ref(call);
 530         q->callback = callback;
 531         q->userdata = userdata;
 532
 533         r = hashmap_put(*registry, call, q);
 534         if (r < 0) {
 535                 async_polkit_query_free(q);
 536                 return r;
 537         }
 538
 539         q->registry = *registry;
 540
 541         r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
 542         if (r < 0) {
 543                 async_polkit_query_free(q);
 544                 return r;
 545         }
 546
 547         return 0;
 548 #endif
 549
 550         return -EACCES;
 551 }
 552
 553 void bus_verify_polkit_async_registry_free(Hashmap *registry) {
 554 #ifdef ENABLE_POLKIT
 555         AsyncPolkitQuery *q;
 556
 557         while ((q = hashmap_steal_first(registry)))
 558                 async_polkit_query_free(q);
 559
 560         hashmap_free(registry);
 561 #endif
 562 }
 563
 564 #if 0 /// UNNEEDED by elogind
 565 int bus_check_peercred(sd_bus *c) {
 566         struct ucred ucred;
 567         socklen_t l;
 568         int fd;
 569
 570         assert(c);
 571
 572         fd = sd_bus_get_fd(c);
 573         if (fd < 0)
 574                 return fd;
 575
 576         l = sizeof(struct ucred);
 577         if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 578                 return -errno;
 579
 580         if (l != sizeof(struct ucred))
 581                 return -E2BIG;
 582
 583         if (ucred.uid != 0 && ucred.uid != geteuid())
 584                 return -EPERM;
 585
 586         return 1;
 587 }
 588
 589 int bus_connect_system_systemd(sd_bus **_bus) {
 590         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 591         int r;
 592
 593         assert(_bus);
 594
 595         if (geteuid() != 0)
 596                 return sd_bus_default_system(_bus);
 597
 598         /* If we are root and kdbus is not available, then let's talk
 599          * directly to the system instance, instead of going via the
 600          * bus */
 601
 602         r = sd_bus_new(&bus);
 603         if (r < 0)
 604                 return r;
 605
 606         r = sd_bus_set_address(bus, KERNEL_SYSTEM_BUS_ADDRESS);
 607         if (r < 0)
 608                 return r;
 609
 610         bus->bus_client = true;
 611
 612         r = sd_bus_start(bus);
 613         if (r >= 0) {
 614                 *_bus = bus;
 615                 bus = NULL;
 616                 return 0;
 617         }
 618
 619         bus = sd_bus_unref(bus);
 620
 621         r = sd_bus_new(&bus);
 622         if (r < 0)
 623                 return r;
 624
 625         r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
 626         if (r < 0)
 627                 return r;
 628
 629         r = sd_bus_start(bus);
 630         if (r < 0)
 631                 return sd_bus_default_system(_bus);
 632
 633         r = bus_check_peercred(bus);
 634         if (r < 0)
 635                 return r;
 636
 637         *_bus = bus;
 638         bus = NULL;
 639
 640         return 0;
 641 }
 642
 643 int bus_connect_user_systemd(sd_bus **_bus) {
 644         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 645         _cleanup_free_ char *ee = NULL;
 646         const char *e;
 647         int r;
 648
 649         /* Try via kdbus first, and then directly */
 650
 651         assert(_bus);
 652
 653         r = sd_bus_new(&bus);
 654         if (r < 0)
 655                 return r;
 656
 657         if (asprintf(&bus->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()) < 0)
 658                 return -ENOMEM;
 659
 660         bus->bus_client = true;
 661
 662         r = sd_bus_start(bus);
 663         if (r >= 0) {
 664                 *_bus = bus;
 665                 bus = NULL;
 666                 return 0;
 667         }
 668
 669         bus = sd_bus_unref(bus);
 670
 671         e = secure_getenv("XDG_RUNTIME_DIR");
 672         if (!e)
 673                 return sd_bus_default_user(_bus);
 674
 675         ee = bus_address_escape(e);
 676         if (!ee)
 677                 return -ENOMEM;
 678
 679         r = sd_bus_new(&bus);
 680         if (r < 0)
 681                 return r;
 682
 683         bus->address = strjoin("unix:path=", ee, "/systemd/private");
 684         if (!bus->address)
 685                 return -ENOMEM;
 686
 687         r = sd_bus_start(bus);
 688         if (r < 0)
 689                 return sd_bus_default_user(_bus);
 690
 691         r = bus_check_peercred(bus);
 692         if (r < 0)
 693                 return r;
 694
 695         *_bus = bus;
 696         bus = NULL;
 697
 698         return 0;
 699 }
 700 #endif // 0
 701
 702 #define print_property(name, fmt, ...)                                  \
 703         do {                                                            \
 704                 if (value)                                              \
 705                         printf(fmt "\n", __VA_ARGS__);                  \
 706                 else                                                    \
 707                         printf("%s=" fmt "\n", name, __VA_ARGS__);      \
 708         } while(0)
 709
 710 int bus_print_property(const char *name, sd_bus_message *property, bool value, bool all) {
 711         char type;
 712         const char *contents;
 713         int r;
 714
 715         assert(name);
 716         assert(property);
 717
 718         r = sd_bus_message_peek_type(property, &type, &contents);
 719         if (r < 0)
 720                 return r;
 721
 722         switch (type) {
 723
 724         case SD_BUS_TYPE_STRING: {
 725                 const char *s;
 726
 727                 r = sd_bus_message_read_basic(property, type, &s);
 728                 if (r < 0)
 729                         return r;
 730
 731                 if (all || !isempty(s)) {
 732                         _cleanup_free_ char *escaped = NULL;
 733
 734                         escaped = xescape(s, "\n");
 735                         if (!escaped)
 736                                 return -ENOMEM;
 737
 738                         print_property(name, "%s", escaped);
 739                 }
 740
 741                 return 1;
 742         }
 743
 744         case SD_BUS_TYPE_BOOLEAN: {
 745                 int b;
 746
 747                 r = sd_bus_message_read_basic(property, type, &b);
 748                 if (r < 0)
 749                         return r;
 750
 751                 print_property(name, "%s", yes_no(b));
 752
 753                 return 1;
 754         }
 755
 756         case SD_BUS_TYPE_UINT64: {
 757                 uint64_t u;
 758
 759                 r = sd_bus_message_read_basic(property, type, &u);
 760                 if (r < 0)
 761                         return r;
 762
 763                 /* Yes, heuristics! But we can change this check
 764                  * should it turn out to not be sufficient */
 765
 766                 if (endswith(name, "Timestamp")) {
 767                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
 768
 769                         t = format_timestamp(timestamp, sizeof(timestamp), u);
 770                         if (t || all)
 771                                 print_property(name, "%s", strempty(t));
 772
 773                 } else if (strstr(name, "USec")) {
 774                         char timespan[FORMAT_TIMESPAN_MAX];
 775
 776                         print_property(name, "%s", format_timespan(timespan, sizeof(timespan), u, 0));
 777                 } else if (streq(name, "RestrictNamespaces")) {
 778                         _cleanup_free_ char *s = NULL;
 779                         const char *result = NULL;
 780
 781                         if ((u & NAMESPACE_FLAGS_ALL) == 0)
 782                                 result = "yes";
 783                         else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
 784                                 result = "no";
 785                         else {
 786                                 r = namespace_flag_to_string_many(u, &s);
 787                                 if (r < 0)
 788                                         return r;
 789
 790                                 result = s;
 791                         }
 792
 793                         print_property(name, "%s", result);
 794                 } else
 795                         print_property(name, "%"PRIu64, u);
 796
 797                 return 1;
 798         }
 799
 800         case SD_BUS_TYPE_INT64: {
 801                 int64_t i;
 802
 803                 r = sd_bus_message_read_basic(property, type, &i);
 804                 if (r < 0)
 805                         return r;
 806
 807                 print_property(name, "%"PRIi64, i);
 808
 809                 return 1;
 810         }
 811
 812         case SD_BUS_TYPE_UINT32: {
 813                 uint32_t u;
 814
 815                 r = sd_bus_message_read_basic(property, type, &u);
 816                 if (r < 0)
 817                         return r;
 818
 819                 if (strstr(name, "UMask") || strstr(name, "Mode"))
 820                         print_property(name, "%04o", u);
 821                 else
 822                         print_property(name, "%"PRIu32, u);
 823
 824                 return 1;
 825         }
 826
 827         case SD_BUS_TYPE_INT32: {
 828                 int32_t i;
 829
 830                 r = sd_bus_message_read_basic(property, type, &i);
 831                 if (r < 0)
 832                         return r;
 833
 834                 print_property(name, "%"PRIi32, i);
 835                 return 1;
 836         }
 837
 838         case SD_BUS_TYPE_DOUBLE: {
 839                 double d;
 840
 841                 r = sd_bus_message_read_basic(property, type, &d);
 842                 if (r < 0)
 843                         return r;
 844
 845                 print_property(name, "%g", d);
 846                 return 1;
 847         }
 848
 849         case SD_BUS_TYPE_ARRAY:
 850                 if (streq(contents, "s")) {
 851                         bool first = true;
 852                         const char *str;
 853
 854                         r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
 855                         if (r < 0)
 856                                 return r;
 857
 858                         while ((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
 859                                 _cleanup_free_ char *escaped = NULL;
 860
 861                                 if (first && !value)
 862                                         printf("%s=", name);
 863
 864                                 escaped = xescape(str, "\n ");
 865                                 if (!escaped)
 866                                         return -ENOMEM;
 867
 868                                 printf("%s%s", first ? "" : " ", escaped);
 869
 870                                 first = false;
 871                         }
 872                         if (r < 0)
 873                                 return r;
 874
 875                         if (first && all && !value)
 876                                 printf("%s=", name);
 877                         if (!first || all)
 878                                 puts("");
 879
 880                         r = sd_bus_message_exit_container(property);
 881                         if (r < 0)
 882                                 return r;
 883
 884                         return 1;
 885
 886                 } else if (streq(contents, "y")) {
 887                         const uint8_t *u;
 888                         size_t n;
 889
 890                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
 891                         if (r < 0)
 892                                 return r;
 893
 894                         if (all || n > 0) {
 895                                 unsigned int i;
 896
 897                                 if (!value)
 898                                         printf("%s=", name);
 899
 900                                 for (i = 0; i < n; i++)
 901                                         printf("%02x", u[i]);
 902
 903                                 puts("");
 904                         }
 905
 906                         return 1;
 907
 908                 } else if (streq(contents, "u")) {
 909                         uint32_t *u;
 910                         size_t n;
 911
 912                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
 913                         if (r < 0)
 914                                 return r;
 915
 916                         if (all || n > 0) {
 917                                 unsigned int i;
 918
 919                                 if (!value)
 920                                         printf("%s=", name);
 921
 922                                 for (i = 0; i < n; i++)
 923                                         printf("%08x", u[i]);
 924
 925                                 puts("");
 926                         }
 927
 928                         return 1;
 929                 }
 930
 931                 break;
 932         }
 933
 934         return 0;
 935 }
 936
 937 int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool value, bool all) {
 938         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 939         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 940         int r;
 941
 942         assert(bus);
 943         assert(path);
 944
 945         r = sd_bus_call_method(bus,
 946                         dest,
 947                         path,
 948                         "org.freedesktop.DBus.Properties",
 949                         "GetAll",
 950                         &error,
 951                         &reply,
 952                         "s", "");
 953         if (r < 0)
 954                 return r;
 955
 956         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
 957         if (r < 0)
 958                 return r;
 959
 960         while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
 961                 const char *name;
 962                 const char *contents;
 963
 964                 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
 965                 if (r < 0)
 966                         return r;
 967
 968                 if (!filter || strv_find(filter, name)) {
 969                         r = sd_bus_message_peek_type(reply, NULL, &contents);
 970                         if (r < 0)
 971                                 return r;
 972
 973                         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
 974                         if (r < 0)
 975                                 return r;
 976
 977                         r = bus_print_property(name, reply, value, all);
 978                         if (r < 0)
 979                                 return r;
 980                         if (r == 0) {
 981                                 if (all)
 982                                         printf("%s=[unprintable]\n", name);
 983                                 /* skip what we didn't read */
 984                                 r = sd_bus_message_skip(reply, contents);
 985                                 if (r < 0)
 986                                         return r;
 987                         }
 988
 989                         r = sd_bus_message_exit_container(reply);
 990                         if (r < 0)
 991                                 return r;
 992                 } else {
 993                         r = sd_bus_message_skip(reply, "v");
 994                         if (r < 0)
 995                                 return r;
 996                 }
 997
 998                 r = sd_bus_message_exit_container(reply);
 999                 if (r < 0)
1000                         return r;
1001         }
1002         if (r < 0)
1003                 return r;
1004
1005         r = sd_bus_message_exit_container(reply);
1006         if (r < 0)
1007                 return r;
1008
1009         return 0;
1010 }
1011
1012 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1013         sd_id128_t *p = userdata;
1014         const void *v;
1015         size_t n;
1016         int r;
1017
1018         r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1019         if (r < 0)
1020                 return r;
1021
1022         if (n == 0)
1023                 *p = SD_ID128_NULL;
1024         else if (n == 16)
1025                 memcpy((*p).bytes, v, n);
1026         else
1027                 return -EINVAL;
1028
1029         return 0;
1030 }
1031
1032 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1033         char type;
1034         int r;
1035
1036         r = sd_bus_message_peek_type(m, &type, NULL);
1037         if (r < 0)
1038                 return r;
1039
1040         switch (type) {
1041
1042         case SD_BUS_TYPE_STRING: {
1043                 char **p = userdata;
1044                 const char *s;
1045
1046                 r = sd_bus_message_read_basic(m, type, &s);
1047                 if (r < 0)
1048                         return r;
1049
1050                 if (isempty(s))
1051                         s = NULL;
1052
1053                 return free_and_strdup(p, s);
1054         }
1055
1056         case SD_BUS_TYPE_ARRAY: {
1057                 _cleanup_strv_free_ char **l = NULL;
1058                 char ***p = userdata;
1059
1060                 r = bus_message_read_strv_extend(m, &l);
1061                 if (r < 0)
1062                         return r;
1063
1064                 strv_free(*p);
1065                 *p = l;
1066                 l = NULL;
1067                 return 0;
1068         }
1069
1070         case SD_BUS_TYPE_BOOLEAN: {
1071                 unsigned b;
1072                 int *p = userdata;
1073
1074                 r = sd_bus_message_read_basic(m, type, &b);
1075                 if (r < 0)
1076                         return r;
1077
1078                 *p = b;
1079                 return 0;
1080         }
1081
1082         case SD_BUS_TYPE_INT32:
1083         case SD_BUS_TYPE_UINT32: {
1084                 uint32_t u, *p = userdata;
1085
1086                 r = sd_bus_message_read_basic(m, type, &u);
1087                 if (r < 0)
1088                         return r;
1089
1090                 *p = u;
1091                 return 0;
1092         }
1093
1094         case SD_BUS_TYPE_INT64:
1095         case SD_BUS_TYPE_UINT64: {
1096                 uint64_t t, *p = userdata;
1097
1098                 r = sd_bus_message_read_basic(m, type, &t);
1099                 if (r < 0)
1100                         return r;
1101
1102                 *p = t;
1103                 return 0;
1104         }
1105
1106         case SD_BUS_TYPE_DOUBLE: {
1107                 double d, *p = userdata;
1108
1109                 r = sd_bus_message_read_basic(m, type, &d);
1110                 if (r < 0)
1111                         return r;
1112
1113                 *p = d;
1114                 return 0;
1115         }}
1116
1117         return -EOPNOTSUPP;
1118 }
1119
1120 int bus_message_map_all_properties(
1121                 sd_bus_message *m,
1122                 const struct bus_properties_map *map,
1123                 sd_bus_error *error,
1124                 void *userdata) {
1125
1126         int r;
1127
1128         assert(m);
1129         assert(map);
1130
1131         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1132         if (r < 0)
1133                 return r;
1134
1135         while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1136                 const struct bus_properties_map *prop;
1137                 const char *member;
1138                 const char *contents;
1139                 void *v;
1140                 unsigned i;
1141
1142                 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1143                 if (r < 0)
1144                         return r;
1145
1146                 for (i = 0, prop = NULL; map[i].member; i++)
1147                         if (streq(map[i].member, member)) {
1148                                 prop = &map[i];
1149                                 break;
1150                         }
1151
1152                 if (prop) {
1153                         r = sd_bus_message_peek_type(m, NULL, &contents);
1154                         if (r < 0)
1155                                 return r;
1156
1157                         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1158                         if (r < 0)
1159                                 return r;
1160
1161                         v = (uint8_t *)userdata + prop->offset;
1162                         if (map[i].set)
1163                                 r = prop->set(sd_bus_message_get_bus(m), member, m, error, v);
1164                         else
1165                                 r = map_basic(sd_bus_message_get_bus(m), member, m, error, v);
1166                         if (r < 0)
1167                                 return r;
1168
1169                         r = sd_bus_message_exit_container(m);
1170                         if (r < 0)
1171                                 return r;
1172                 } else {
1173                         r = sd_bus_message_skip(m, "v");
1174                         if (r < 0)
1175                                 return r;
1176                 }
1177
1178                 r = sd_bus_message_exit_container(m);
1179                 if (r < 0)
1180                         return r;
1181         }
1182         if (r < 0)
1183                 return r;
1184
1185         return sd_bus_message_exit_container(m);
1186 }
1187
1188 #if 0 /// UNNEEDED by elogind
1189 int bus_message_map_properties_changed(
1190                 sd_bus_message *m,
1191                 const struct bus_properties_map *map,
1192                 sd_bus_error *error,
1193                 void *userdata) {
1194
1195         const char *member;
1196         int r, invalidated, i;
1197
1198         assert(m);
1199         assert(map);
1200
1201         r = bus_message_map_all_properties(m, map, error, userdata);
1202         if (r < 0)
1203                 return r;
1204
1205         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1206         if (r < 0)
1207                 return r;
1208
1209         invalidated = 0;
1210         while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1211                 for (i = 0; map[i].member; i++)
1212                         if (streq(map[i].member, member)) {
1213                                 ++invalidated;
1214                                 break;
1215                         }
1216         if (r < 0)
1217                 return r;
1218
1219         r = sd_bus_message_exit_container(m);
1220         if (r < 0)
1221                 return r;
1222
1223         return invalidated;
1224 }
1225 #endif // 0
1226
1227 int bus_map_all_properties(
1228                 sd_bus *bus,
1229                 const char *destination,
1230                 const char *path,
1231                 const struct bus_properties_map *map,
1232                 sd_bus_error *error,
1233                 void *userdata) {
1234
1235         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1236         int r;
1237
1238         assert(bus);
1239         assert(destination);
1240         assert(path);
1241         assert(map);
1242
1243         r = sd_bus_call_method(
1244                         bus,
1245                         destination,
1246                         path,
1247                         "org.freedesktop.DBus.Properties",
1248                         "GetAll",
1249                         error,
1250                         &m,
1251                         "s", "");
1252         if (r < 0)
1253                 return r;
1254
1255         return bus_message_map_all_properties(m, map, error, userdata);
1256 }
1257
1258 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
1259         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1260         int r;
1261
1262         assert(transport >= 0);
1263         assert(transport < _BUS_TRANSPORT_MAX);
1264         assert(ret);
1265
1266         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1267         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1268
1269         switch (transport) {
1270
1271         case BUS_TRANSPORT_LOCAL:
1272 #if 0 /// elogind does not support a user bus
1273                 if (user)
1274                         r = sd_bus_default_user(&bus);
1275                 else
1276 #endif // 0
1277                         r = sd_bus_default_system(&bus);
1278
1279                 break;
1280
1281         case BUS_TRANSPORT_REMOTE:
1282                 r = sd_bus_open_system_remote(&bus, host);
1283                 break;
1284
1285         case BUS_TRANSPORT_MACHINE:
1286                 r = sd_bus_open_system_machine(&bus, host);
1287                 break;
1288
1289         default:
1290                 assert_not_reached("Hmm, unknown transport type.");
1291         }
1292         if (r < 0)
1293                 return r;
1294
1295         r = sd_bus_set_exit_on_disconnect(bus, true);
1296         if (r < 0)
1297                 return r;
1298
1299         *ret = bus;
1300         bus = NULL;
1301
1302         return 0;
1303 }
1304
1305 #if 0 /// UNNEEDED by elogind
1306 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1307         int r;
1308
1309         assert(transport >= 0);
1310         assert(transport < _BUS_TRANSPORT_MAX);
1311         assert(bus);
1312
1313         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1314         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1315
1316         switch (transport) {
1317
1318         case BUS_TRANSPORT_LOCAL:
1319                 if (user)
1320                         r = bus_connect_user_systemd(bus);
1321                 else
1322                         r = bus_connect_system_systemd(bus);
1323
1324                 break;
1325
1326         case BUS_TRANSPORT_REMOTE:
1327                 r = sd_bus_open_system_remote(bus, host);
1328                 break;
1329
1330         case BUS_TRANSPORT_MACHINE:
1331                 r = sd_bus_open_system_machine(bus, host);
1332                 break;
1333
1334         default:
1335                 assert_not_reached("Hmm, unknown transport type.");
1336         }
1337
1338         return r;
1339 }
1340 #endif // 0
1341
1342 int bus_property_get_bool(
1343                 sd_bus *bus,
1344                 const char *path,
1345                 const char *interface,
1346                 const char *property,
1347                 sd_bus_message *reply,
1348                 void *userdata,
1349                 sd_bus_error *error) {
1350
1351         int b = *(bool*) userdata;
1352
1353         return sd_bus_message_append_basic(reply, 'b', &b);
1354 }
1355
1356 #if 0 /// UNNEEDED by elogind
1357 int bus_property_get_id128(
1358                 sd_bus *bus,
1359                 const char *path,
1360                 const char *interface,
1361                 const char *property,
1362                 sd_bus_message *reply,
1363                 void *userdata,
1364                 sd_bus_error *error) {
1365
1366         sd_id128_t *id = userdata;
1367
1368         if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
1369                 return sd_bus_message_append(reply, "ay", 0);
1370         else
1371                 return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
1372 }
1373 #endif // 0
1374
1375 #if __SIZEOF_SIZE_T__ != 8
1376 int bus_property_get_size(
1377                 sd_bus *bus,
1378                 const char *path,
1379                 const char *interface,
1380                 const char *property,
1381                 sd_bus_message *reply,
1382                 void *userdata,
1383                 sd_bus_error *error) {
1384
1385         uint64_t sz = *(size_t*) userdata;
1386
1387         return sd_bus_message_append_basic(reply, 't', &sz);
1388 }
1389 #endif
1390
1391 #if __SIZEOF_LONG__ != 8
1392 int bus_property_get_long(
1393                 sd_bus *bus,
1394                 const char *path,
1395                 const char *interface,
1396                 const char *property,
1397                 sd_bus_message *reply,
1398                 void *userdata,
1399                 sd_bus_error *error) {
1400
1401         int64_t l = *(long*) userdata;
1402
1403         return sd_bus_message_append_basic(reply, 'x', &l);
1404 }
1405
1406 int bus_property_get_ulong(
1407                 sd_bus *bus,
1408                 const char *path,
1409                 const char *interface,
1410                 const char *property,
1411                 sd_bus_message *reply,
1412                 void *userdata,
1413                 sd_bus_error *error) {
1414
1415         uint64_t ul = *(unsigned long*) userdata;
1416
1417         return sd_bus_message_append_basic(reply, 't', &ul);
1418 }
1419 #endif
1420
1421 int bus_log_parse_error(int r) {
1422         return log_error_errno(r, "Failed to parse bus message: %m");
1423 }
1424
1425 #if 0 /// UNNEEDED by elogind
1426 int bus_log_create_error(int r) {
1427         return log_error_errno(r, "Failed to create bus message: %m");
1428 }
1429
1430 #endif // 0
1431 #if 0 /// UNNEEDED by elogind
1432 /**
1433  * bus_path_encode_unique() - encode unique object path
1434  * @b: bus connection or NULL
1435  * @prefix: object path prefix
1436  * @sender_id: unique-name of client, or NULL
1437  * @external_id: external ID to be chosen by client, or NULL
1438  * @ret_path: storage for encoded object path pointer
1439  *
1440  * Whenever we provide a bus API that allows clients to create and manage
1441  * server-side objects, we need to provide a unique name for these objects. If
1442  * we let the server choose the name, we suffer from a race condition: If a
1443  * client creates an object asynchronously, it cannot destroy that object until
1444  * it received the method reply. It cannot know the name of the new object,
1445  * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1446  *
1447  * Therefore, many APIs allow the client to choose the unique name for newly
1448  * created objects. There're two problems to solve, though:
1449  *    1) Object names are usually defined via dbus object paths, which are
1450  *       usually globally namespaced. Therefore, multiple clients must be able
1451  *       to choose unique object names without interference.
1452  *    2) If multiple libraries share the same bus connection, they must be
1453  *       able to choose unique object names without interference.
1454  * The first problem is solved easily by prefixing a name with the
1455  * unique-bus-name of a connection. The server side must enforce this and
1456  * reject any other name. The second problem is solved by providing unique
1457  * suffixes from within sd-bus.
1458  *
1459  * This helper allows clients to create unique object-paths. It uses the
1460  * template '/prefix/sender_id/external_id' and returns the new path in
1461  * @ret_path (must be freed by the caller).
1462  * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1463  * NULL, this function allocates a unique suffix via @b (by requesting a new
1464  * cookie). If both @sender_id and @external_id are given, @b can be passed as
1465  * NULL.
1466  *
1467  * Returns: 0 on success, negative error code on failure.
1468  */
1469 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1470         _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1471         char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1472         int r;
1473
1474         assert_return(b || (sender_id && external_id), -EINVAL);
1475         assert_return(object_path_is_valid(prefix), -EINVAL);
1476         assert_return(ret_path, -EINVAL);
1477
1478         if (!sender_id) {
1479                 r = sd_bus_get_unique_name(b, &sender_id);
1480                 if (r < 0)
1481                         return r;
1482         }
1483
1484         if (!external_id) {
1485                 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1486                 external_id = external_buf;
1487         }
1488
1489         sender_label = bus_label_escape(sender_id);
1490         if (!sender_label)
1491                 return -ENOMEM;
1492
1493         external_label = bus_label_escape(external_id);
1494         if (!external_label)
1495                 return -ENOMEM;
1496
1497         p = strjoin(prefix, "/", sender_label, "/", external_label);
1498         if (!p)
1499                 return -ENOMEM;
1500
1501         *ret_path = p;
1502         return 0;
1503 }
1504
1505 /**
1506  * bus_path_decode_unique() - decode unique object path
1507  * @path: object path to decode
1508  * @prefix: object path prefix
1509  * @ret_sender: output parameter for sender-id label
1510  * @ret_external: output parameter for external-id label
1511  *
1512  * This does the reverse of bus_path_encode_unique() (see its description for
1513  * details). Both trailing labels, sender-id and external-id, are unescaped and
1514  * returned in the given output parameters (the caller must free them).
1515  *
1516  * Note that this function returns 0 if the path does not match the template
1517  * (see bus_path_encode_unique()), 1 if it matched.
1518  *
1519  * Returns: Negative error code on failure, 0 if the given object path does not
1520  *          match the template (return parameters are set to NULL), 1 if it was
1521  *          parsed successfully (return parameters contain allocated labels).
1522  */
1523 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1524         const char *p, *q;
1525         char *sender, *external;
1526
1527         assert(object_path_is_valid(path));
1528         assert(object_path_is_valid(prefix));
1529         assert(ret_sender);
1530         assert(ret_external);
1531
1532         p = object_path_startswith(path, prefix);
1533         if (!p) {
1534                 *ret_sender = NULL;
1535                 *ret_external = NULL;
1536                 return 0;
1537         }
1538
1539         q = strchr(p, '/');
1540         if (!q) {
1541                 *ret_sender = NULL;
1542                 *ret_external = NULL;
1543                 return 0;
1544         }
1545
1546         sender = bus_label_unescape_n(p, q - p);
1547         external = bus_label_unescape(q + 1);
1548         if (!sender || !external) {
1549                 free(sender);
1550                 free(external);
1551                 return -ENOMEM;
1552         }
1553
1554         *ret_sender = sender;
1555         *ret_external = external;
1556         return 1;
1557 }
1558 #endif // 0
1559
1560 #if 0 /// UNNEEDED by elogind
1561 int bus_property_get_rlimit(
1562                 sd_bus *bus,
1563                 const char *path,
1564                 const char *interface,
1565                 const char *property,
1566                 sd_bus_message *reply,
1567                 void *userdata,
1568                 sd_bus_error *error) {
1569
1570         struct rlimit *rl;
1571         uint64_t u;
1572         rlim_t x;
1573         const char *is_soft;
1574
1575         assert(bus);
1576         assert(reply);
1577         assert(userdata);
1578
1579         is_soft = endswith(property, "Soft");
1580         rl = *(struct rlimit**) userdata;
1581         if (rl)
1582                 x = is_soft ? rl->rlim_cur : rl->rlim_max;
1583         else {
1584                 struct rlimit buf = {};
1585                 int z;
1586                 const char *s;
1587
1588                 s = is_soft ? strndupa(property, is_soft - property) : property;
1589
1590                 z = rlimit_from_string(strstr(s, "Limit"));
1591                 assert(z >= 0);
1592
1593                 getrlimit(z, &buf);
1594                 x = is_soft ? buf.rlim_cur : buf.rlim_max;
1595         }
1596
1597         /* rlim_t might have different sizes, let's map
1598          * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
1599          * all archs */
1600         u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
1601
1602         return sd_bus_message_append(reply, "t", u);
1603 }
1604
1605 int bus_track_add_name_many(sd_bus_track *t, char **l) {
1606         int r = 0;
1607         char **i;
1608
1609         assert(t);
1610
1611         /* Continues adding after failure, and returns the first failure. */
1612
1613         STRV_FOREACH(i, l) {
1614                 int k;
1615
1616                 k = sd_bus_track_add_name(t, *i);
1617                 if (k < 0 && r >= 0)
1618                         r = k;
1619         }
1620
1621         return r;
1622 }
1623 #endif // 0