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                         bool good;
 733
 734                         /* This property has a single value, so we need to take
 735                          * care not to print a new line, everything else is OK. */
 736                         good = !strchr(s, '\n');
 737                         print_property(name, "%s", good ? s : "[unprintable]");
 738                 }
 739
 740                 return 1;
 741         }
 742
 743         case SD_BUS_TYPE_BOOLEAN: {
 744                 int b;
 745
 746                 r = sd_bus_message_read_basic(property, type, &b);
 747                 if (r < 0)
 748                         return r;
 749
 750                 print_property(name, "%s", yes_no(b));
 751
 752                 return 1;
 753         }
 754
 755         case SD_BUS_TYPE_UINT64: {
 756                 uint64_t u;
 757
 758                 r = sd_bus_message_read_basic(property, type, &u);
 759                 if (r < 0)
 760                         return r;
 761
 762                 /* Yes, heuristics! But we can change this check
 763                  * should it turn out to not be sufficient */
 764
 765                 if (endswith(name, "Timestamp")) {
 766                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
 767
 768                         t = format_timestamp(timestamp, sizeof(timestamp), u);
 769                         if (t || all)
 770                                 print_property(name, "%s", strempty(t));
 771
 772                 } else if (strstr(name, "USec")) {
 773                         char timespan[FORMAT_TIMESPAN_MAX];
 774
 775                         print_property(name, "%s", format_timespan(timespan, sizeof(timespan), u, 0));
 776                 } else if (streq(name, "RestrictNamespaces")) {
 777                         _cleanup_free_ char *s = NULL;
 778                         const char *result = NULL;
 779
 780                         if ((u & NAMESPACE_FLAGS_ALL) == 0)
 781                                 result = "yes";
 782                         else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
 783                                 result = "no";
 784                         else {
 785                                 r = namespace_flag_to_string_many(u, &s);
 786                                 if (r < 0)
 787                                         return r;
 788
 789                                 result = s;
 790                         }
 791
 792                         print_property(name, "%s", result);
 793                 } else
 794                         print_property(name, "%"PRIu64, u);
 795
 796                 return 1;
 797         }
 798
 799         case SD_BUS_TYPE_INT64: {
 800                 int64_t i;
 801
 802                 r = sd_bus_message_read_basic(property, type, &i);
 803                 if (r < 0)
 804                         return r;
 805
 806                 print_property(name, "%"PRIi64, i);
 807
 808                 return 1;
 809         }
 810
 811         case SD_BUS_TYPE_UINT32: {
 812                 uint32_t u;
 813
 814                 r = sd_bus_message_read_basic(property, type, &u);
 815                 if (r < 0)
 816                         return r;
 817
 818                 if (strstr(name, "UMask") || strstr(name, "Mode"))
 819                         print_property(name, "%04o", u);
 820                 else
 821                         print_property(name, "%"PRIu32, u);
 822
 823                 return 1;
 824         }
 825
 826         case SD_BUS_TYPE_INT32: {
 827                 int32_t i;
 828
 829                 r = sd_bus_message_read_basic(property, type, &i);
 830                 if (r < 0)
 831                         return r;
 832
 833                 print_property(name, "%"PRIi32, i);
 834                 return 1;
 835         }
 836
 837         case SD_BUS_TYPE_DOUBLE: {
 838                 double d;
 839
 840                 r = sd_bus_message_read_basic(property, type, &d);
 841                 if (r < 0)
 842                         return r;
 843
 844                 print_property(name, "%g", d);
 845                 return 1;
 846         }
 847
 848         case SD_BUS_TYPE_ARRAY:
 849                 if (streq(contents, "s")) {
 850                         bool first = true;
 851                         const char *str;
 852
 853                         r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
 854                         if (r < 0)
 855                                 return r;
 856
 857                         while ((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
 858                                 bool good;
 859
 860                                 if (first && !value)
 861                                         printf("%s=", name);
 862
 863                                 /* This property has multiple space-seperated values, so
 864                                  * neither spaces not newlines can be allowed in a value. */
 865                                 good = str[strcspn(str, " \n")] == '\0';
 866
 867                                 printf("%s%s", first ? "" : " ", good ? str : "[unprintable]");
 868
 869                                 first = false;
 870                         }
 871                         if (r < 0)
 872                                 return r;
 873
 874                         if (first && all && !value)
 875                                 printf("%s=", name);
 876                         if (!first || all)
 877                                 puts("");
 878
 879                         r = sd_bus_message_exit_container(property);
 880                         if (r < 0)
 881                                 return r;
 882
 883                         return 1;
 884
 885                 } else if (streq(contents, "y")) {
 886                         const uint8_t *u;
 887                         size_t n;
 888
 889                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
 890                         if (r < 0)
 891                                 return r;
 892
 893                         if (all || n > 0) {
 894                                 unsigned int i;
 895
 896                                 if (!value)
 897                                         printf("%s=", name);
 898
 899                                 for (i = 0; i < n; i++)
 900                                         printf("%02x", u[i]);
 901
 902                                 puts("");
 903                         }
 904
 905                         return 1;
 906
 907                 } else if (streq(contents, "u")) {
 908                         uint32_t *u;
 909                         size_t n;
 910
 911                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
 912                         if (r < 0)
 913                                 return r;
 914
 915                         if (all || n > 0) {
 916                                 unsigned int i;
 917
 918                                 if (!value)
 919                                         printf("%s=", name);
 920
 921                                 for (i = 0; i < n; i++)
 922                                         printf("%08x", u[i]);
 923
 924                                 puts("");
 925                         }
 926
 927                         return 1;
 928                 }
 929
 930                 break;
 931         }
 932
 933         return 0;
 934 }
 935
 936 int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool value, bool all) {
 937         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 938         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 939         int r;
 940
 941         assert(bus);
 942         assert(path);
 943
 944         r = sd_bus_call_method(bus,
 945                         dest,
 946                         path,
 947                         "org.freedesktop.DBus.Properties",
 948                         "GetAll",
 949                         &error,
 950                         &reply,
 951                         "s", "");
 952         if (r < 0)
 953                 return r;
 954
 955         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
 956         if (r < 0)
 957                 return r;
 958
 959         while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
 960                 const char *name;
 961                 const char *contents;
 962
 963                 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
 964                 if (r < 0)
 965                         return r;
 966
 967                 if (!filter || strv_find(filter, name)) {
 968                         r = sd_bus_message_peek_type(reply, NULL, &contents);
 969                         if (r < 0)
 970                                 return r;
 971
 972                         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
 973                         if (r < 0)
 974                                 return r;
 975
 976                         r = bus_print_property(name, reply, value, all);
 977                         if (r < 0)
 978                                 return r;
 979                         if (r == 0) {
 980                                 if (all)
 981                                         printf("%s=[unprintable]\n", name);
 982                                 /* skip what we didn't read */
 983                                 r = sd_bus_message_skip(reply, contents);
 984                                 if (r < 0)
 985                                         return r;
 986                         }
 987
 988                         r = sd_bus_message_exit_container(reply);
 989                         if (r < 0)
 990                                 return r;
 991                 } else {
 992                         r = sd_bus_message_skip(reply, "v");
 993                         if (r < 0)
 994                                 return r;
 995                 }
 996
 997                 r = sd_bus_message_exit_container(reply);
 998                 if (r < 0)
 999                         return r;
1000         }
1001         if (r < 0)
1002                 return r;
1003
1004         r = sd_bus_message_exit_container(reply);
1005         if (r < 0)
1006                 return r;
1007
1008         return 0;
1009 }
1010
1011 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1012         sd_id128_t *p = userdata;
1013         const void *v;
1014         size_t n;
1015         int r;
1016
1017         r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1018         if (r < 0)
1019                 return r;
1020
1021         if (n == 0)
1022                 *p = SD_ID128_NULL;
1023         else if (n == 16)
1024                 memcpy((*p).bytes, v, n);
1025         else
1026                 return -EINVAL;
1027
1028         return 0;
1029 }
1030
1031 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1032         char type;
1033         int r;
1034
1035         r = sd_bus_message_peek_type(m, &type, NULL);
1036         if (r < 0)
1037                 return r;
1038
1039         switch (type) {
1040
1041         case SD_BUS_TYPE_STRING: {
1042                 char **p = userdata;
1043                 const char *s;
1044
1045                 r = sd_bus_message_read_basic(m, type, &s);
1046                 if (r < 0)
1047                         return r;
1048
1049                 if (isempty(s))
1050                         s = NULL;
1051
1052                 return free_and_strdup(p, s);
1053         }
1054
1055         case SD_BUS_TYPE_ARRAY: {
1056                 _cleanup_strv_free_ char **l = NULL;
1057                 char ***p = userdata;
1058
1059                 r = bus_message_read_strv_extend(m, &l);
1060                 if (r < 0)
1061                         return r;
1062
1063                 strv_free(*p);
1064                 *p = l;
1065                 l = NULL;
1066                 return 0;
1067         }
1068
1069         case SD_BUS_TYPE_BOOLEAN: {
1070                 unsigned b;
1071                 int *p = userdata;
1072
1073                 r = sd_bus_message_read_basic(m, type, &b);
1074                 if (r < 0)
1075                         return r;
1076
1077                 *p = b;
1078                 return 0;
1079         }
1080
1081         case SD_BUS_TYPE_INT32:
1082         case SD_BUS_TYPE_UINT32: {
1083                 uint32_t u, *p = userdata;
1084
1085                 r = sd_bus_message_read_basic(m, type, &u);
1086                 if (r < 0)
1087                         return r;
1088
1089                 *p = u;
1090                 return 0;
1091         }
1092
1093         case SD_BUS_TYPE_INT64:
1094         case SD_BUS_TYPE_UINT64: {
1095                 uint64_t t, *p = userdata;
1096
1097                 r = sd_bus_message_read_basic(m, type, &t);
1098                 if (r < 0)
1099                         return r;
1100
1101                 *p = t;
1102                 return 0;
1103         }
1104
1105         case SD_BUS_TYPE_DOUBLE: {
1106                 double d, *p = userdata;
1107
1108                 r = sd_bus_message_read_basic(m, type, &d);
1109                 if (r < 0)
1110                         return r;
1111
1112                 *p = d;
1113                 return 0;
1114         }}
1115
1116         return -EOPNOTSUPP;
1117 }
1118
1119 int bus_message_map_all_properties(
1120                 sd_bus_message *m,
1121                 const struct bus_properties_map *map,
1122                 sd_bus_error *error,
1123                 void *userdata) {
1124
1125         int r;
1126
1127         assert(m);
1128         assert(map);
1129
1130         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1131         if (r < 0)
1132                 return r;
1133
1134         while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1135                 const struct bus_properties_map *prop;
1136                 const char *member;
1137                 const char *contents;
1138                 void *v;
1139                 unsigned i;
1140
1141                 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1142                 if (r < 0)
1143                         return r;
1144
1145                 for (i = 0, prop = NULL; map[i].member; i++)
1146                         if (streq(map[i].member, member)) {
1147                                 prop = &map[i];
1148                                 break;
1149                         }
1150
1151                 if (prop) {
1152                         r = sd_bus_message_peek_type(m, NULL, &contents);
1153                         if (r < 0)
1154                                 return r;
1155
1156                         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1157                         if (r < 0)
1158                                 return r;
1159
1160                         v = (uint8_t *)userdata + prop->offset;
1161                         if (map[i].set)
1162                                 r = prop->set(sd_bus_message_get_bus(m), member, m, error, v);
1163                         else
1164                                 r = map_basic(sd_bus_message_get_bus(m), member, m, error, v);
1165                         if (r < 0)
1166                                 return r;
1167
1168                         r = sd_bus_message_exit_container(m);
1169                         if (r < 0)
1170                                 return r;
1171                 } else {
1172                         r = sd_bus_message_skip(m, "v");
1173                         if (r < 0)
1174                                 return r;
1175                 }
1176
1177                 r = sd_bus_message_exit_container(m);
1178                 if (r < 0)
1179                         return r;
1180         }
1181         if (r < 0)
1182                 return r;
1183
1184         return sd_bus_message_exit_container(m);
1185 }
1186
1187 #if 0 /// UNNEEDED by elogind
1188 int bus_message_map_properties_changed(
1189                 sd_bus_message *m,
1190                 const struct bus_properties_map *map,
1191                 sd_bus_error *error,
1192                 void *userdata) {
1193
1194         const char *member;
1195         int r, invalidated, i;
1196
1197         assert(m);
1198         assert(map);
1199
1200         r = bus_message_map_all_properties(m, map, error, userdata);
1201         if (r < 0)
1202                 return r;
1203
1204         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1205         if (r < 0)
1206                 return r;
1207
1208         invalidated = 0;
1209         while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1210                 for (i = 0; map[i].member; i++)
1211                         if (streq(map[i].member, member)) {
1212                                 ++invalidated;
1213                                 break;
1214                         }
1215         if (r < 0)
1216                 return r;
1217
1218         r = sd_bus_message_exit_container(m);
1219         if (r < 0)
1220                 return r;
1221
1222         return invalidated;
1223 }
1224 #endif // 0
1225
1226 int bus_map_all_properties(
1227                 sd_bus *bus,
1228                 const char *destination,
1229                 const char *path,
1230                 const struct bus_properties_map *map,
1231                 sd_bus_error *error,
1232                 void *userdata) {
1233
1234         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1235         int r;
1236
1237         assert(bus);
1238         assert(destination);
1239         assert(path);
1240         assert(map);
1241
1242         r = sd_bus_call_method(
1243                         bus,
1244                         destination,
1245                         path,
1246                         "org.freedesktop.DBus.Properties",
1247                         "GetAll",
1248                         error,
1249                         &m,
1250                         "s", "");
1251         if (r < 0)
1252                 return r;
1253
1254         return bus_message_map_all_properties(m, map, error, userdata);
1255 }
1256
1257 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
1258         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1259         int r;
1260
1261         assert(transport >= 0);
1262         assert(transport < _BUS_TRANSPORT_MAX);
1263         assert(ret);
1264
1265         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1266         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1267
1268         switch (transport) {
1269
1270         case BUS_TRANSPORT_LOCAL:
1271 #if 0 /// elogind does not support a user bus
1272                 if (user)
1273                         r = sd_bus_default_user(&bus);
1274                 else
1275 #endif // 0
1276                         r = sd_bus_default_system(&bus);
1277
1278                 break;
1279
1280         case BUS_TRANSPORT_REMOTE:
1281                 r = sd_bus_open_system_remote(&bus, host);
1282                 break;
1283
1284         case BUS_TRANSPORT_MACHINE:
1285                 r = sd_bus_open_system_machine(&bus, host);
1286                 break;
1287
1288         default:
1289                 assert_not_reached("Hmm, unknown transport type.");
1290         }
1291         if (r < 0)
1292                 return r;
1293
1294         r = sd_bus_set_exit_on_disconnect(bus, true);
1295         if (r < 0)
1296                 return r;
1297
1298         *ret = bus;
1299         bus = NULL;
1300
1301         return 0;
1302 }
1303
1304 #if 0 /// UNNEEDED by elogind
1305 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1306         int r;
1307
1308         assert(transport >= 0);
1309         assert(transport < _BUS_TRANSPORT_MAX);
1310         assert(bus);
1311
1312         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1313         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1314
1315         switch (transport) {
1316
1317         case BUS_TRANSPORT_LOCAL:
1318                 if (user)
1319                         r = bus_connect_user_systemd(bus);
1320                 else
1321                         r = bus_connect_system_systemd(bus);
1322
1323                 break;
1324
1325         case BUS_TRANSPORT_REMOTE:
1326                 r = sd_bus_open_system_remote(bus, host);
1327                 break;
1328
1329         case BUS_TRANSPORT_MACHINE:
1330                 r = sd_bus_open_system_machine(bus, host);
1331                 break;
1332
1333         default:
1334                 assert_not_reached("Hmm, unknown transport type.");
1335         }
1336
1337         return r;
1338 }
1339 #endif // 0
1340
1341 int bus_property_get_bool(
1342                 sd_bus *bus,
1343                 const char *path,
1344                 const char *interface,
1345                 const char *property,
1346                 sd_bus_message *reply,
1347                 void *userdata,
1348                 sd_bus_error *error) {
1349
1350         int b = *(bool*) userdata;
1351
1352         return sd_bus_message_append_basic(reply, 'b', &b);
1353 }
1354
1355 #if 0 /// UNNEEDED by elogind
1356 int bus_property_get_id128(
1357                 sd_bus *bus,
1358                 const char *path,
1359                 const char *interface,
1360                 const char *property,
1361                 sd_bus_message *reply,
1362                 void *userdata,
1363                 sd_bus_error *error) {
1364
1365         sd_id128_t *id = userdata;
1366
1367         if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
1368                 return sd_bus_message_append(reply, "ay", 0);
1369         else
1370                 return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
1371 }
1372 #endif // 0
1373
1374 #if __SIZEOF_SIZE_T__ != 8
1375 int bus_property_get_size(
1376                 sd_bus *bus,
1377                 const char *path,
1378                 const char *interface,
1379                 const char *property,
1380                 sd_bus_message *reply,
1381                 void *userdata,
1382                 sd_bus_error *error) {
1383
1384         uint64_t sz = *(size_t*) userdata;
1385
1386         return sd_bus_message_append_basic(reply, 't', &sz);
1387 }
1388 #endif
1389
1390 #if __SIZEOF_LONG__ != 8
1391 int bus_property_get_long(
1392                 sd_bus *bus,
1393                 const char *path,
1394                 const char *interface,
1395                 const char *property,
1396                 sd_bus_message *reply,
1397                 void *userdata,
1398                 sd_bus_error *error) {
1399
1400         int64_t l = *(long*) userdata;
1401
1402         return sd_bus_message_append_basic(reply, 'x', &l);
1403 }
1404
1405 int bus_property_get_ulong(
1406                 sd_bus *bus,
1407                 const char *path,
1408                 const char *interface,
1409                 const char *property,
1410                 sd_bus_message *reply,
1411                 void *userdata,
1412                 sd_bus_error *error) {
1413
1414         uint64_t ul = *(unsigned long*) userdata;
1415
1416         return sd_bus_message_append_basic(reply, 't', &ul);
1417 }
1418 #endif
1419
1420 int bus_log_parse_error(int r) {
1421         return log_error_errno(r, "Failed to parse bus message: %m");
1422 }
1423
1424 #if 0 /// UNNEEDED by elogind
1425 int bus_log_create_error(int r) {
1426         return log_error_errno(r, "Failed to create bus message: %m");
1427 }
1428
1429 #endif // 0
1430 #if 0 /// UNNEEDED by elogind
1431 /**
1432  * bus_path_encode_unique() - encode unique object path
1433  * @b: bus connection or NULL
1434  * @prefix: object path prefix
1435  * @sender_id: unique-name of client, or NULL
1436  * @external_id: external ID to be chosen by client, or NULL
1437  * @ret_path: storage for encoded object path pointer
1438  *
1439  * Whenever we provide a bus API that allows clients to create and manage
1440  * server-side objects, we need to provide a unique name for these objects. If
1441  * we let the server choose the name, we suffer from a race condition: If a
1442  * client creates an object asynchronously, it cannot destroy that object until
1443  * it received the method reply. It cannot know the name of the new object,
1444  * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1445  *
1446  * Therefore, many APIs allow the client to choose the unique name for newly
1447  * created objects. There're two problems to solve, though:
1448  *    1) Object names are usually defined via dbus object paths, which are
1449  *       usually globally namespaced. Therefore, multiple clients must be able
1450  *       to choose unique object names without interference.
1451  *    2) If multiple libraries share the same bus connection, they must be
1452  *       able to choose unique object names without interference.
1453  * The first problem is solved easily by prefixing a name with the
1454  * unique-bus-name of a connection. The server side must enforce this and
1455  * reject any other name. The second problem is solved by providing unique
1456  * suffixes from within sd-bus.
1457  *
1458  * This helper allows clients to create unique object-paths. It uses the
1459  * template '/prefix/sender_id/external_id' and returns the new path in
1460  * @ret_path (must be freed by the caller).
1461  * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1462  * NULL, this function allocates a unique suffix via @b (by requesting a new
1463  * cookie). If both @sender_id and @external_id are given, @b can be passed as
1464  * NULL.
1465  *
1466  * Returns: 0 on success, negative error code on failure.
1467  */
1468 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1469         _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1470         char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1471         int r;
1472
1473         assert_return(b || (sender_id && external_id), -EINVAL);
1474         assert_return(object_path_is_valid(prefix), -EINVAL);
1475         assert_return(ret_path, -EINVAL);
1476
1477         if (!sender_id) {
1478                 r = sd_bus_get_unique_name(b, &sender_id);
1479                 if (r < 0)
1480                         return r;
1481         }
1482
1483         if (!external_id) {
1484                 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1485                 external_id = external_buf;
1486         }
1487
1488         sender_label = bus_label_escape(sender_id);
1489         if (!sender_label)
1490                 return -ENOMEM;
1491
1492         external_label = bus_label_escape(external_id);
1493         if (!external_label)
1494                 return -ENOMEM;
1495
1496         p = strjoin(prefix, "/", sender_label, "/", external_label);
1497         if (!p)
1498                 return -ENOMEM;
1499
1500         *ret_path = p;
1501         return 0;
1502 }
1503
1504 /**
1505  * bus_path_decode_unique() - decode unique object path
1506  * @path: object path to decode
1507  * @prefix: object path prefix
1508  * @ret_sender: output parameter for sender-id label
1509  * @ret_external: output parameter for external-id label
1510  *
1511  * This does the reverse of bus_path_encode_unique() (see its description for
1512  * details). Both trailing labels, sender-id and external-id, are unescaped and
1513  * returned in the given output parameters (the caller must free them).
1514  *
1515  * Note that this function returns 0 if the path does not match the template
1516  * (see bus_path_encode_unique()), 1 if it matched.
1517  *
1518  * Returns: Negative error code on failure, 0 if the given object path does not
1519  *          match the template (return parameters are set to NULL), 1 if it was
1520  *          parsed successfully (return parameters contain allocated labels).
1521  */
1522 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1523         const char *p, *q;
1524         char *sender, *external;
1525
1526         assert(object_path_is_valid(path));
1527         assert(object_path_is_valid(prefix));
1528         assert(ret_sender);
1529         assert(ret_external);
1530
1531         p = object_path_startswith(path, prefix);
1532         if (!p) {
1533                 *ret_sender = NULL;
1534                 *ret_external = NULL;
1535                 return 0;
1536         }
1537
1538         q = strchr(p, '/');
1539         if (!q) {
1540                 *ret_sender = NULL;
1541                 *ret_external = NULL;
1542                 return 0;
1543         }
1544
1545         sender = bus_label_unescape_n(p, q - p);
1546         external = bus_label_unescape(q + 1);
1547         if (!sender || !external) {
1548                 free(sender);
1549                 free(external);
1550                 return -ENOMEM;
1551         }
1552
1553         *ret_sender = sender;
1554         *ret_external = external;
1555         return 1;
1556 }
1557 #endif // 0
1558
1559 #if 0 /// UNNEEDED by elogind
1560 int bus_property_get_rlimit(
1561                 sd_bus *bus,
1562                 const char *path,
1563                 const char *interface,
1564                 const char *property,
1565                 sd_bus_message *reply,
1566                 void *userdata,
1567                 sd_bus_error *error) {
1568
1569         struct rlimit *rl;
1570         uint64_t u;
1571         rlim_t x;
1572         const char *is_soft;
1573
1574         assert(bus);
1575         assert(reply);
1576         assert(userdata);
1577
1578         is_soft = endswith(property, "Soft");
1579         rl = *(struct rlimit**) userdata;
1580         if (rl)
1581                 x = is_soft ? rl->rlim_cur : rl->rlim_max;
1582         else {
1583                 struct rlimit buf = {};
1584                 int z;
1585                 const char *s;
1586
1587                 s = is_soft ? strndupa(property, is_soft - property) : property;
1588
1589                 z = rlimit_from_string(strstr(s, "Limit"));
1590                 assert(z >= 0);
1591
1592                 getrlimit(z, &buf);
1593                 x = is_soft ? buf.rlim_cur : buf.rlim_max;
1594         }
1595
1596         /* rlim_t might have different sizes, let's map
1597          * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
1598          * all archs */
1599         u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
1600
1601         return sd_bus_message_append(reply, "t", u);
1602 }
1603
1604 int bus_track_add_name_many(sd_bus_track *t, char **l) {
1605         int r = 0;
1606         char **i;
1607
1608         assert(t);
1609
1610         /* Continues adding after failure, and returns the first failure. */
1611
1612         STRV_FOREACH(i, l) {
1613                 int k;
1614
1615                 k = sd_bus_track_add_name(t, *i);
1616                 if (k < 0 && r >= 0)
1617                         r = k;
1618         }
1619
1620         return r;
1621 }
1622 #endif // 0