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 "cgroup-util.h"
  43 #include "def.h"
  44 #include "escape.h"
  45 #include "fd-util.h"
  46 #include "missing.h"
  47 #include "mount-util.h"
  48 #include "nsflags.h"
  49 #include "parse-util.h"
  50 #include "proc-cmdline.h"
  51 #include "rlimit-util.h"
  52 #include "stdio-util.h"
  53 #include "strv.h"
  54 #include "user-util.h"
  55
  56 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  57         sd_event *e = userdata;
  58
  59         assert(m);
  60         assert(e);
  61
  62         sd_bus_close(sd_bus_message_get_bus(m));
  63         sd_event_exit(e, 0);
  64
  65         return 1;
  66 }
  67
  68 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
  69         _cleanup_free_ char *match = NULL;
  70         const char *unique;
  71         int r;
  72
  73         assert(e);
  74         assert(bus);
  75         assert(name);
  76
  77         /* We unregister the name here and then wait for the
  78          * NameOwnerChanged signal for this event to arrive before we
  79          * quit. We do this in order to make sure that any queued
  80          * requests are still processed before we really exit. */
  81
  82         r = sd_bus_get_unique_name(bus, &unique);
  83         if (r < 0)
  84                 return r;
  85
  86         r = asprintf(&match,
  87                      "sender='org.freedesktop.DBus',"
  88                      "type='signal',"
  89                      "interface='org.freedesktop.DBus',"
  90                      "member='NameOwnerChanged',"
  91                      "path='/org/freedesktop/DBus',"
  92                      "arg0='%s',"
  93                      "arg1='%s',"
  94                      "arg2=''", name, unique);
  95         if (r < 0)
  96                 return -ENOMEM;
  97
  98         r = sd_bus_add_match(bus, NULL, match, name_owner_change_callback, e);
  99         if (r < 0)
 100                 return r;
 101
 102         r = sd_bus_release_name(bus, name);
 103         if (r < 0)
 104                 return r;
 105
 106         return 0;
 107 }
 108
 109 int bus_event_loop_with_idle(
 110                 sd_event *e,
 111                 sd_bus *bus,
 112                 const char *name,
 113                 usec_t timeout,
 114                 check_idle_t check_idle,
 115                 void *userdata) {
 116         bool exiting = false;
 117         int r, code;
 118
 119         assert(e);
 120         assert(bus);
 121         assert(name);
 122
 123         for (;;) {
 124                 bool idle;
 125
 126                 r = sd_event_get_state(e);
 127                 if (r < 0)
 128                         return r;
 129                 if (r == SD_EVENT_FINISHED)
 130                         break;
 131
 132                 if (check_idle)
 133                         idle = check_idle(userdata);
 134                 else
 135                         idle = true;
 136
 137                 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
 138                 if (r < 0)
 139                         return r;
 140
 141                 if (r == 0 && !exiting && idle) {
 142
 143                         r = sd_bus_try_close(bus);
 144                         if (r == -EBUSY)
 145                                 continue;
 146
 147                         /* Fallback for dbus1 connections: we
 148                          * unregister the name and wait for the
 149                          * response to come through for it */
 150                         if (r == -EOPNOTSUPP) {
 151
 152                                 /* Inform the service manager that we
 153                                  * are going down, so that it will
 154                                  * queue all further start requests,
 155                                  * instead of assuming we are already
 156                                  * running. */
 157                                 sd_notify(false, "STOPPING=1");
 158
 159                                 r = bus_async_unregister_and_exit(e, bus, name);
 160                                 if (r < 0)
 161                                         return r;
 162
 163                                 exiting = true;
 164                                 continue;
 165                         }
 166
 167                         if (r < 0)
 168                                 return r;
 169
 170                         sd_event_exit(e, 0);
 171                         break;
 172                 }
 173         }
 174
 175         r = sd_event_get_exit_code(e, &code);
 176         if (r < 0)
 177                 return r;
 178
 179         return code;
 180 }
 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 int bus_check_peercred(sd_bus *c) {
 565         struct ucred ucred;
 566         socklen_t l;
 567         int fd;
 568
 569         assert(c);
 570
 571         fd = sd_bus_get_fd(c);
 572         if (fd < 0)
 573                 return fd;
 574
 575         l = sizeof(struct ucred);
 576         if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 577                 return -errno;
 578
 579         if (l != sizeof(struct ucred))
 580                 return -E2BIG;
 581
 582         if (ucred.uid != 0 && ucred.uid != geteuid())
 583                 return -EPERM;
 584
 585         return 1;
 586 }
 587
 588 int bus_connect_system_systemd(sd_bus **_bus) {
 589         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 590         int r;
 591
 592         assert(_bus);
 593
 594         if (geteuid() != 0)
 595                 return sd_bus_default_system(_bus);
 596
 597         /* If we are root then let's talk directly to the system
 598          * instance, instead of going via the bus */
 599
 600         r = sd_bus_new(&bus);
 601         if (r < 0)
 602                 return r;
 603
 604         r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
 605         if (r < 0)
 606                 return r;
 607
 608         r = sd_bus_start(bus);
 609         if (r < 0)
 610                 return sd_bus_default_system(_bus);
 611
 612         r = bus_check_peercred(bus);
 613         if (r < 0)
 614                 return r;
 615
 616         *_bus = bus;
 617         bus = NULL;
 618
 619         return 0;
 620 }
 621
 622 int bus_connect_user_systemd(sd_bus **_bus) {
 623         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 624         _cleanup_free_ char *ee = NULL;
 625         const char *e;
 626         int r;
 627
 628         assert(_bus);
 629
 630         e = secure_getenv("XDG_RUNTIME_DIR");
 631         if (!e)
 632                 return sd_bus_default_user(_bus);
 633
 634         ee = bus_address_escape(e);
 635         if (!ee)
 636                 return -ENOMEM;
 637
 638         r = sd_bus_new(&bus);
 639         if (r < 0)
 640                 return r;
 641
 642         bus->address = strjoin("unix:path=", ee, "/systemd/private");
 643         if (!bus->address)
 644                 return -ENOMEM;
 645
 646         r = sd_bus_start(bus);
 647         if (r < 0)
 648                 return sd_bus_default_user(_bus);
 649
 650         r = bus_check_peercred(bus);
 651         if (r < 0)
 652                 return r;
 653
 654         *_bus = bus;
 655         bus = NULL;
 656
 657         return 0;
 658 }
 659
 660 #define print_property(name, fmt, ...)                                  \
 661         do {                                                            \
 662                 if (value)                                              \
 663                         printf(fmt "\n", __VA_ARGS__);                  \
 664                 else                                                    \
 665                         printf("%s=" fmt "\n", name, __VA_ARGS__);      \
 666         } while(0)
 667
 668 int bus_print_property(const char *name, sd_bus_message *property, bool value, bool all) {
 669         char type;
 670         const char *contents;
 671         int r;
 672
 673         assert(name);
 674         assert(property);
 675
 676         r = sd_bus_message_peek_type(property, &type, &contents);
 677         if (r < 0)
 678                 return r;
 679
 680         switch (type) {
 681
 682         case SD_BUS_TYPE_STRING: {
 683                 const char *s;
 684
 685                 r = sd_bus_message_read_basic(property, type, &s);
 686                 if (r < 0)
 687                         return r;
 688
 689                 if (all || !isempty(s)) {
 690                         bool good;
 691
 692                         /* This property has a single value, so we need to take
 693                          * care not to print a new line, everything else is OK. */
 694                         good = !strchr(s, '\n');
 695                         print_property(name, "%s", good ? s : "[unprintable]");
 696                 }
 697
 698                 return 1;
 699         }
 700
 701         case SD_BUS_TYPE_BOOLEAN: {
 702                 int b;
 703
 704                 r = sd_bus_message_read_basic(property, type, &b);
 705                 if (r < 0)
 706                         return r;
 707
 708                 print_property(name, "%s", yes_no(b));
 709
 710                 return 1;
 711         }
 712
 713         case SD_BUS_TYPE_UINT64: {
 714                 uint64_t u;
 715
 716                 r = sd_bus_message_read_basic(property, type, &u);
 717                 if (r < 0)
 718                         return r;
 719
 720                 /* Yes, heuristics! But we can change this check
 721                  * should it turn out to not be sufficient */
 722
 723                 if (endswith(name, "Timestamp")) {
 724                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
 725
 726                         t = format_timestamp(timestamp, sizeof(timestamp), u);
 727                         if (t || all)
 728                                 print_property(name, "%s", strempty(t));
 729
 730                 } else if (strstr(name, "USec")) {
 731                         char timespan[FORMAT_TIMESPAN_MAX];
 732
 733                         print_property(name, "%s", format_timespan(timespan, sizeof(timespan), u, 0));
 734                 } else if (streq(name, "RestrictNamespaces")) {
 735                         _cleanup_free_ char *s = NULL;
 736                         const char *result = NULL;
 737
 738                         if ((u & NAMESPACE_FLAGS_ALL) == 0)
 739                                 result = "yes";
 740                         else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
 741                                 result = "no";
 742                         else {
 743                                 r = namespace_flag_to_string_many(u, &s);
 744                                 if (r < 0)
 745                                         return r;
 746
 747                                 result = s;
 748                         }
 749
 750                         print_property(name, "%s", result);
 751
 752                 } else if (streq(name, "MountFlags")) {
 753                         const char *result = NULL;
 754
 755                         result = mount_propagation_flags_to_string(u);
 756                         if (!result)
 757                                 return -EINVAL;
 758
 759                         print_property(name, "%s", result);
 760
 761                 } else if ((STR_IN_SET(name, "CPUWeight", "StartupCPUWeight", "IOWeight", "StartupIOWeight") && u == CGROUP_WEIGHT_INVALID) ||
 762                            (STR_IN_SET(name, "CPUShares", "StartupCPUShares") && u == CGROUP_CPU_SHARES_INVALID) ||
 763                            (STR_IN_SET(name, "BlockIOWeight", "StartupBlockIOWeight") && u == CGROUP_BLKIO_WEIGHT_INVALID) ||
 764                            (STR_IN_SET(name, "MemoryCurrent", "TasksCurrent") && u == (uint64_t) -1) ||
 765                            (endswith(name, "NSec") && u == (uint64_t) -1))
 766
 767                         print_property(name, "%s", "[not set]");
 768
 769                 else if ((STR_IN_SET(name, "MemoryLow", "MemoryHigh", "MemoryMax", "MemorySwapMax", "MemoryLimit") && u == CGROUP_LIMIT_MAX) ||
 770                          (STR_IN_SET(name, "TasksMax", "DefaultTasksMax") && u == (uint64_t) -1) ||
 771                          (startswith(name, "Limit") && u == (uint64_t) -1) ||
 772                          (startswith(name, "DefaultLimit") && u == (uint64_t) -1))
 773
 774                         print_property(name, "%s", "infinity");
 775                 else
 776                         print_property(name, "%"PRIu64, u);
 777
 778                 return 1;
 779         }
 780
 781         case SD_BUS_TYPE_INT64: {
 782                 int64_t i;
 783
 784                 r = sd_bus_message_read_basic(property, type, &i);
 785                 if (r < 0)
 786                         return r;
 787
 788                 print_property(name, "%"PRIi64, i);
 789
 790                 return 1;
 791         }
 792
 793         case SD_BUS_TYPE_UINT32: {
 794                 uint32_t u;
 795
 796                 r = sd_bus_message_read_basic(property, type, &u);
 797                 if (r < 0)
 798                         return r;
 799
 800                 if (strstr(name, "UMask") || strstr(name, "Mode"))
 801                         print_property(name, "%04o", u);
 802                 else
 803                         print_property(name, "%"PRIu32, u);
 804
 805                 return 1;
 806         }
 807
 808         case SD_BUS_TYPE_INT32: {
 809                 int32_t i;
 810
 811                 r = sd_bus_message_read_basic(property, type, &i);
 812                 if (r < 0)
 813                         return r;
 814
 815                 print_property(name, "%"PRIi32, i);
 816                 return 1;
 817         }
 818
 819         case SD_BUS_TYPE_DOUBLE: {
 820                 double d;
 821
 822                 r = sd_bus_message_read_basic(property, type, &d);
 823                 if (r < 0)
 824                         return r;
 825
 826                 print_property(name, "%g", d);
 827                 return 1;
 828         }
 829
 830         case SD_BUS_TYPE_ARRAY:
 831                 if (streq(contents, "s")) {
 832                         bool first = true;
 833                         const char *str;
 834
 835                         r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
 836                         if (r < 0)
 837                                 return r;
 838
 839                         while ((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
 840                                 bool good;
 841
 842                                 if (first && !value)
 843                                         printf("%s=", name);
 844
 845                                 /* This property has multiple space-separated values, so
 846                                  * neither spaces not newlines can be allowed in a value. */
 847                                 good = str[strcspn(str, " \n")] == '\0';
 848
 849                                 printf("%s%s", first ? "" : " ", good ? str : "[unprintable]");
 850
 851                                 first = false;
 852                         }
 853                         if (r < 0)
 854                                 return r;
 855
 856                         if (first && all && !value)
 857                                 printf("%s=", name);
 858                         if (!first || all)
 859                                 puts("");
 860
 861                         r = sd_bus_message_exit_container(property);
 862                         if (r < 0)
 863                                 return r;
 864
 865                         return 1;
 866
 867                 } else if (streq(contents, "y")) {
 868                         const uint8_t *u;
 869                         size_t n;
 870
 871                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
 872                         if (r < 0)
 873                                 return r;
 874
 875                         if (all || n > 0) {
 876                                 unsigned int i;
 877
 878                                 if (!value)
 879                                         printf("%s=", name);
 880
 881                                 for (i = 0; i < n; i++)
 882                                         printf("%02x", u[i]);
 883
 884                                 puts("");
 885                         }
 886
 887                         return 1;
 888
 889                 } else if (streq(contents, "u")) {
 890                         uint32_t *u;
 891                         size_t n;
 892
 893                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
 894                         if (r < 0)
 895                                 return r;
 896
 897                         if (all || n > 0) {
 898                                 unsigned int i;
 899
 900                                 if (!value)
 901                                         printf("%s=", name);
 902
 903                                 for (i = 0; i < n; i++)
 904                                         printf("%08x", u[i]);
 905
 906                                 puts("");
 907                         }
 908
 909                         return 1;
 910                 }
 911
 912                 break;
 913         }
 914
 915         return 0;
 916 }
 917
 918 int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool value, bool all) {
 919         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 920         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 921         int r;
 922
 923         assert(bus);
 924         assert(path);
 925
 926         r = sd_bus_call_method(bus,
 927                         dest,
 928                         path,
 929                         "org.freedesktop.DBus.Properties",
 930                         "GetAll",
 931                         &error,
 932                         &reply,
 933                         "s", "");
 934         if (r < 0)
 935                 return r;
 936
 937         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
 938         if (r < 0)
 939                 return r;
 940
 941         while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
 942                 const char *name;
 943                 const char *contents;
 944
 945                 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
 946                 if (r < 0)
 947                         return r;
 948
 949                 if (!filter || strv_find(filter, name)) {
 950                         r = sd_bus_message_peek_type(reply, NULL, &contents);
 951                         if (r < 0)
 952                                 return r;
 953
 954                         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
 955                         if (r < 0)
 956                                 return r;
 957
 958                         r = bus_print_property(name, reply, value, all);
 959                         if (r < 0)
 960                                 return r;
 961                         if (r == 0) {
 962                                 if (all)
 963                                         printf("%s=[unprintable]\n", name);
 964                                 /* skip what we didn't read */
 965                                 r = sd_bus_message_skip(reply, contents);
 966                                 if (r < 0)
 967                                         return r;
 968                         }
 969
 970                         r = sd_bus_message_exit_container(reply);
 971                         if (r < 0)
 972                                 return r;
 973                 } else {
 974                         r = sd_bus_message_skip(reply, "v");
 975                         if (r < 0)
 976                                 return r;
 977                 }
 978
 979                 r = sd_bus_message_exit_container(reply);
 980                 if (r < 0)
 981                         return r;
 982         }
 983         if (r < 0)
 984                 return r;
 985
 986         r = sd_bus_message_exit_container(reply);
 987         if (r < 0)
 988                 return r;
 989
 990         return 0;
 991 }
 992
 993 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
 994         sd_id128_t *p = userdata;
 995         const void *v;
 996         size_t n;
 997         int r;
 998
 999         r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1000         if (r < 0)
1001                 return r;
1002
1003         if (n == 0)
1004                 *p = SD_ID128_NULL;
1005         else if (n == 16)
1006                 memcpy((*p).bytes, v, n);
1007         else
1008                 return -EINVAL;
1009
1010         return 0;
1011 }
1012
1013 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1014         char type;
1015         int r;
1016
1017         r = sd_bus_message_peek_type(m, &type, NULL);
1018         if (r < 0)
1019                 return r;
1020
1021         switch (type) {
1022
1023         case SD_BUS_TYPE_STRING: {
1024                 char **p = userdata;
1025                 const char *s;
1026
1027                 r = sd_bus_message_read_basic(m, type, &s);
1028                 if (r < 0)
1029                         return r;
1030
1031                 if (isempty(s))
1032                         s = NULL;
1033
1034                 return free_and_strdup(p, s);
1035         }
1036
1037         case SD_BUS_TYPE_ARRAY: {
1038                 _cleanup_strv_free_ char **l = NULL;
1039                 char ***p = userdata;
1040
1041                 r = bus_message_read_strv_extend(m, &l);
1042                 if (r < 0)
1043                         return r;
1044
1045                 strv_free(*p);
1046                 *p = l;
1047                 l = NULL;
1048                 return 0;
1049         }
1050
1051         case SD_BUS_TYPE_BOOLEAN: {
1052                 unsigned b;
1053                 int *p = userdata;
1054
1055                 r = sd_bus_message_read_basic(m, type, &b);
1056                 if (r < 0)
1057                         return r;
1058
1059                 *p = b;
1060                 return 0;
1061         }
1062
1063         case SD_BUS_TYPE_INT32:
1064         case SD_BUS_TYPE_UINT32: {
1065                 uint32_t u, *p = userdata;
1066
1067                 r = sd_bus_message_read_basic(m, type, &u);
1068                 if (r < 0)
1069                         return r;
1070
1071                 *p = u;
1072                 return 0;
1073         }
1074
1075         case SD_BUS_TYPE_INT64:
1076         case SD_BUS_TYPE_UINT64: {
1077                 uint64_t t, *p = userdata;
1078
1079                 r = sd_bus_message_read_basic(m, type, &t);
1080                 if (r < 0)
1081                         return r;
1082
1083                 *p = t;
1084                 return 0;
1085         }
1086
1087         case SD_BUS_TYPE_DOUBLE: {
1088                 double d, *p = userdata;
1089
1090                 r = sd_bus_message_read_basic(m, type, &d);
1091                 if (r < 0)
1092                         return r;
1093
1094                 *p = d;
1095                 return 0;
1096         }}
1097
1098         return -EOPNOTSUPP;
1099 }
1100
1101 int bus_message_map_all_properties(
1102                 sd_bus_message *m,
1103                 const struct bus_properties_map *map,
1104                 sd_bus_error *error,
1105                 void *userdata) {
1106
1107         int r;
1108
1109         assert(m);
1110         assert(map);
1111
1112         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1113         if (r < 0)
1114                 return r;
1115
1116         while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1117                 const struct bus_properties_map *prop;
1118                 const char *member;
1119                 const char *contents;
1120                 void *v;
1121                 unsigned i;
1122
1123                 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1124                 if (r < 0)
1125                         return r;
1126
1127                 for (i = 0, prop = NULL; map[i].member; i++)
1128                         if (streq(map[i].member, member)) {
1129                                 prop = &map[i];
1130                                 break;
1131                         }
1132
1133                 if (prop) {
1134                         r = sd_bus_message_peek_type(m, NULL, &contents);
1135                         if (r < 0)
1136                                 return r;
1137
1138                         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1139                         if (r < 0)
1140                                 return r;
1141
1142                         v = (uint8_t *)userdata + prop->offset;
1143                         if (map[i].set)
1144                                 r = prop->set(sd_bus_message_get_bus(m), member, m, error, v);
1145                         else
1146                                 r = map_basic(sd_bus_message_get_bus(m), member, m, error, v);
1147                         if (r < 0)
1148                                 return r;
1149
1150                         r = sd_bus_message_exit_container(m);
1151                         if (r < 0)
1152                                 return r;
1153                 } else {
1154                         r = sd_bus_message_skip(m, "v");
1155                         if (r < 0)
1156                                 return r;
1157                 }
1158
1159                 r = sd_bus_message_exit_container(m);
1160                 if (r < 0)
1161                         return r;
1162         }
1163         if (r < 0)
1164                 return r;
1165
1166         return sd_bus_message_exit_container(m);
1167 }
1168
1169 int bus_message_map_properties_changed(
1170                 sd_bus_message *m,
1171                 const struct bus_properties_map *map,
1172                 sd_bus_error *error,
1173                 void *userdata) {
1174
1175         const char *member;
1176         int r, invalidated, i;
1177
1178         assert(m);
1179         assert(map);
1180
1181         r = bus_message_map_all_properties(m, map, error, userdata);
1182         if (r < 0)
1183                 return r;
1184
1185         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1186         if (r < 0)
1187                 return r;
1188
1189         invalidated = 0;
1190         while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1191                 for (i = 0; map[i].member; i++)
1192                         if (streq(map[i].member, member)) {
1193                                 ++invalidated;
1194                                 break;
1195                         }
1196         if (r < 0)
1197                 return r;
1198
1199         r = sd_bus_message_exit_container(m);
1200         if (r < 0)
1201                 return r;
1202
1203         return invalidated;
1204 }
1205
1206 int bus_map_all_properties(
1207                 sd_bus *bus,
1208                 const char *destination,
1209                 const char *path,
1210                 const struct bus_properties_map *map,
1211                 sd_bus_error *error,
1212                 void *userdata) {
1213
1214         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1215         int r;
1216
1217         assert(bus);
1218         assert(destination);
1219         assert(path);
1220         assert(map);
1221
1222         r = sd_bus_call_method(
1223                         bus,
1224                         destination,
1225                         path,
1226                         "org.freedesktop.DBus.Properties",
1227                         "GetAll",
1228                         error,
1229                         &m,
1230                         "s", "");
1231         if (r < 0)
1232                 return r;
1233
1234         return bus_message_map_all_properties(m, map, error, userdata);
1235 }
1236
1237 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
1238         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1239         int r;
1240
1241         assert(transport >= 0);
1242         assert(transport < _BUS_TRANSPORT_MAX);
1243         assert(ret);
1244
1245         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1246         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1247
1248         switch (transport) {
1249
1250         case BUS_TRANSPORT_LOCAL:
1251                 if (user)
1252                         r = sd_bus_default_user(&bus);
1253                 else
1254                         r = sd_bus_default_system(&bus);
1255
1256                 break;
1257
1258         case BUS_TRANSPORT_REMOTE:
1259                 r = sd_bus_open_system_remote(&bus, host);
1260                 break;
1261
1262         case BUS_TRANSPORT_MACHINE:
1263                 r = sd_bus_open_system_machine(&bus, host);
1264                 break;
1265
1266         default:
1267                 assert_not_reached("Hmm, unknown transport type.");
1268         }
1269         if (r < 0)
1270                 return r;
1271
1272         r = sd_bus_set_exit_on_disconnect(bus, true);
1273         if (r < 0)
1274                 return r;
1275
1276         *ret = bus;
1277         bus = NULL;
1278
1279         return 0;
1280 }
1281
1282 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1283         int r;
1284
1285         assert(transport >= 0);
1286         assert(transport < _BUS_TRANSPORT_MAX);
1287         assert(bus);
1288
1289         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1290         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1291
1292         switch (transport) {
1293
1294         case BUS_TRANSPORT_LOCAL:
1295                 if (user)
1296                         r = bus_connect_user_systemd(bus);
1297                 else
1298                         r = bus_connect_system_systemd(bus);
1299
1300                 break;
1301
1302         case BUS_TRANSPORT_REMOTE:
1303                 r = sd_bus_open_system_remote(bus, host);
1304                 break;
1305
1306         case BUS_TRANSPORT_MACHINE:
1307                 r = sd_bus_open_system_machine(bus, host);
1308                 break;
1309
1310         default:
1311                 assert_not_reached("Hmm, unknown transport type.");
1312         }
1313
1314         return r;
1315 }
1316
1317 int bus_property_get_bool(
1318                 sd_bus *bus,
1319                 const char *path,
1320                 const char *interface,
1321                 const char *property,
1322                 sd_bus_message *reply,
1323                 void *userdata,
1324                 sd_bus_error *error) {
1325
1326         int b = *(bool*) userdata;
1327
1328         return sd_bus_message_append_basic(reply, 'b', &b);
1329 }
1330
1331 int bus_property_get_id128(
1332                 sd_bus *bus,
1333                 const char *path,
1334                 const char *interface,
1335                 const char *property,
1336                 sd_bus_message *reply,
1337                 void *userdata,
1338                 sd_bus_error *error) {
1339
1340         sd_id128_t *id = userdata;
1341
1342         if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
1343                 return sd_bus_message_append(reply, "ay", 0);
1344         else
1345                 return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
1346 }
1347
1348 #if __SIZEOF_SIZE_T__ != 8
1349 int bus_property_get_size(
1350                 sd_bus *bus,
1351                 const char *path,
1352                 const char *interface,
1353                 const char *property,
1354                 sd_bus_message *reply,
1355                 void *userdata,
1356                 sd_bus_error *error) {
1357
1358         uint64_t sz = *(size_t*) userdata;
1359
1360         return sd_bus_message_append_basic(reply, 't', &sz);
1361 }
1362 #endif
1363
1364 #if __SIZEOF_LONG__ != 8
1365 int bus_property_get_long(
1366                 sd_bus *bus,
1367                 const char *path,
1368                 const char *interface,
1369                 const char *property,
1370                 sd_bus_message *reply,
1371                 void *userdata,
1372                 sd_bus_error *error) {
1373
1374         int64_t l = *(long*) userdata;
1375
1376         return sd_bus_message_append_basic(reply, 'x', &l);
1377 }
1378
1379 int bus_property_get_ulong(
1380                 sd_bus *bus,
1381                 const char *path,
1382                 const char *interface,
1383                 const char *property,
1384                 sd_bus_message *reply,
1385                 void *userdata,
1386                 sd_bus_error *error) {
1387
1388         uint64_t ul = *(unsigned long*) userdata;
1389
1390         return sd_bus_message_append_basic(reply, 't', &ul);
1391 }
1392 #endif
1393
1394 int bus_log_parse_error(int r) {
1395         return log_error_errno(r, "Failed to parse bus message: %m");
1396 }
1397
1398 int bus_log_create_error(int r) {
1399         return log_error_errno(r, "Failed to create bus message: %m");
1400 }
1401
1402 /**
1403  * bus_path_encode_unique() - encode unique object path
1404  * @b: bus connection or NULL
1405  * @prefix: object path prefix
1406  * @sender_id: unique-name of client, or NULL
1407  * @external_id: external ID to be chosen by client, or NULL
1408  * @ret_path: storage for encoded object path pointer
1409  *
1410  * Whenever we provide a bus API that allows clients to create and manage
1411  * server-side objects, we need to provide a unique name for these objects. If
1412  * we let the server choose the name, we suffer from a race condition: If a
1413  * client creates an object asynchronously, it cannot destroy that object until
1414  * it received the method reply. It cannot know the name of the new object,
1415  * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1416  *
1417  * Therefore, many APIs allow the client to choose the unique name for newly
1418  * created objects. There're two problems to solve, though:
1419  *    1) Object names are usually defined via dbus object paths, which are
1420  *       usually globally namespaced. Therefore, multiple clients must be able
1421  *       to choose unique object names without interference.
1422  *    2) If multiple libraries share the same bus connection, they must be
1423  *       able to choose unique object names without interference.
1424  * The first problem is solved easily by prefixing a name with the
1425  * unique-bus-name of a connection. The server side must enforce this and
1426  * reject any other name. The second problem is solved by providing unique
1427  * suffixes from within sd-bus.
1428  *
1429  * This helper allows clients to create unique object-paths. It uses the
1430  * template '/prefix/sender_id/external_id' and returns the new path in
1431  * @ret_path (must be freed by the caller).
1432  * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1433  * NULL, this function allocates a unique suffix via @b (by requesting a new
1434  * cookie). If both @sender_id and @external_id are given, @b can be passed as
1435  * NULL.
1436  *
1437  * Returns: 0 on success, negative error code on failure.
1438  */
1439 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1440         _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1441         char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1442         int r;
1443
1444         assert_return(b || (sender_id && external_id), -EINVAL);
1445         assert_return(object_path_is_valid(prefix), -EINVAL);
1446         assert_return(ret_path, -EINVAL);
1447
1448         if (!sender_id) {
1449                 r = sd_bus_get_unique_name(b, &sender_id);
1450                 if (r < 0)
1451                         return r;
1452         }
1453
1454         if (!external_id) {
1455                 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1456                 external_id = external_buf;
1457         }
1458
1459         sender_label = bus_label_escape(sender_id);
1460         if (!sender_label)
1461                 return -ENOMEM;
1462
1463         external_label = bus_label_escape(external_id);
1464         if (!external_label)
1465                 return -ENOMEM;
1466
1467         p = strjoin(prefix, "/", sender_label, "/", external_label);
1468         if (!p)
1469                 return -ENOMEM;
1470
1471         *ret_path = p;
1472         return 0;
1473 }
1474
1475 /**
1476  * bus_path_decode_unique() - decode unique object path
1477  * @path: object path to decode
1478  * @prefix: object path prefix
1479  * @ret_sender: output parameter for sender-id label
1480  * @ret_external: output parameter for external-id label
1481  *
1482  * This does the reverse of bus_path_encode_unique() (see its description for
1483  * details). Both trailing labels, sender-id and external-id, are unescaped and
1484  * returned in the given output parameters (the caller must free them).
1485  *
1486  * Note that this function returns 0 if the path does not match the template
1487  * (see bus_path_encode_unique()), 1 if it matched.
1488  *
1489  * Returns: Negative error code on failure, 0 if the given object path does not
1490  *          match the template (return parameters are set to NULL), 1 if it was
1491  *          parsed successfully (return parameters contain allocated labels).
1492  */
1493 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1494         const char *p, *q;
1495         char *sender, *external;
1496
1497         assert(object_path_is_valid(path));
1498         assert(object_path_is_valid(prefix));
1499         assert(ret_sender);
1500         assert(ret_external);
1501
1502         p = object_path_startswith(path, prefix);
1503         if (!p) {
1504                 *ret_sender = NULL;
1505                 *ret_external = NULL;
1506                 return 0;
1507         }
1508
1509         q = strchr(p, '/');
1510         if (!q) {
1511                 *ret_sender = NULL;
1512                 *ret_external = NULL;
1513                 return 0;
1514         }
1515
1516         sender = bus_label_unescape_n(p, q - p);
1517         external = bus_label_unescape(q + 1);
1518         if (!sender || !external) {
1519                 free(sender);
1520                 free(external);
1521                 return -ENOMEM;
1522         }
1523
1524         *ret_sender = sender;
1525         *ret_external = external;
1526         return 1;
1527 }
1528
1529 int bus_property_get_rlimit(
1530                 sd_bus *bus,
1531                 const char *path,
1532                 const char *interface,
1533                 const char *property,
1534                 sd_bus_message *reply,
1535                 void *userdata,
1536                 sd_bus_error *error) {
1537
1538         struct rlimit *rl;
1539         uint64_t u;
1540         rlim_t x;
1541         const char *is_soft;
1542
1543         assert(bus);
1544         assert(reply);
1545         assert(userdata);
1546
1547         is_soft = endswith(property, "Soft");
1548         rl = *(struct rlimit**) userdata;
1549         if (rl)
1550                 x = is_soft ? rl->rlim_cur : rl->rlim_max;
1551         else {
1552                 struct rlimit buf = {};
1553                 int z;
1554                 const char *s;
1555
1556                 s = is_soft ? strndupa(property, is_soft - property) : property;
1557
1558                 z = rlimit_from_string(strstr(s, "Limit"));
1559                 assert(z >= 0);
1560
1561                 getrlimit(z, &buf);
1562                 x = is_soft ? buf.rlim_cur : buf.rlim_max;
1563         }
1564
1565         /* rlim_t might have different sizes, let's map
1566          * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
1567          * all archs */
1568         u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
1569
1570         return sd_bus_message_append(reply, "t", u);
1571 }
1572
1573 int bus_track_add_name_many(sd_bus_track *t, char **l) {
1574         int r = 0;
1575         char **i;
1576
1577         assert(t);
1578
1579         /* Continues adding after failure, and returns the first failure. */
1580
1581         STRV_FOREACH(i, l) {
1582                 int k;
1583
1584                 k = sd_bus_track_add_name(t, *i);
1585                 if (k < 0 && r >= 0)
1586                         r = k;
1587         }
1588
1589         return r;
1590 }