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 "cap-list.h"
  43 #include "cgroup-util.h"
  44 #include "def.h"
  45 #include "escape.h"
  46 #include "fd-util.h"
  47 #include "missing.h"
  48 #include "mount-util.h"
  49 #include "nsflags.h"
  50 #include "parse-util.h"
  51 #include "proc-cmdline.h"
  52 //#include "rlimit-util.h"
  53 #include "stdio-util.h"
  54 #include "strv.h"
  55 #include "user-util.h"
  56
  57 #if 0 /// UNNEEDED by elogind
  58 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
  59         sd_event *e = userdata;
  60
  61         assert(m);
  62         assert(e);
  63
  64         sd_bus_close(sd_bus_message_get_bus(m));
  65         sd_event_exit(e, 0);
  66
  67         return 1;
  68 }
  69
  70 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
  71         _cleanup_free_ char *match = NULL;
  72         const char *unique;
  73         int r;
  74
  75         assert(e);
  76         assert(bus);
  77         assert(name);
  78
  79         /* We unregister the name here and then wait for the
  80          * NameOwnerChanged signal for this event to arrive before we
  81          * quit. We do this in order to make sure that any queued
  82          * requests are still processed before we really exit. */
  83
  84         r = sd_bus_get_unique_name(bus, &unique);
  85         if (r < 0)
  86                 return r;
  87
  88         r = asprintf(&match,
  89                      "sender='org.freedesktop.DBus',"
  90                      "type='signal',"
  91                      "interface='org.freedesktop.DBus',"
  92                      "member='NameOwnerChanged',"
  93                      "path='/org/freedesktop/DBus',"
  94                      "arg0='%s',"
  95                      "arg1='%s',"
  96                      "arg2=''", name, unique);
  97         if (r < 0)
  98                 return -ENOMEM;
  99
 100         r = sd_bus_add_match(bus, NULL, match, name_owner_change_callback, e);
 101         if (r < 0)
 102                 return r;
 103
 104         r = sd_bus_release_name(bus, name);
 105         if (r < 0)
 106                 return r;
 107
 108         return 0;
 109 }
 110
 111 int bus_event_loop_with_idle(
 112                 sd_event *e,
 113                 sd_bus *bus,
 114                 const char *name,
 115                 usec_t timeout,
 116                 check_idle_t check_idle,
 117                 void *userdata) {
 118         bool exiting = false;
 119         int r, code;
 120
 121         assert(e);
 122         assert(bus);
 123         assert(name);
 124
 125         for (;;) {
 126                 bool idle;
 127
 128                 r = sd_event_get_state(e);
 129                 if (r < 0)
 130                         return r;
 131                 if (r == SD_EVENT_FINISHED)
 132                         break;
 133
 134                 if (check_idle)
 135                         idle = check_idle(userdata);
 136                 else
 137                         idle = true;
 138
 139                 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
 140                 if (r < 0)
 141                         return r;
 142
 143                 if (r == 0 && !exiting && idle) {
 144
 145                         r = sd_bus_try_close(bus);
 146                         if (r == -EBUSY)
 147                                 continue;
 148
 149                         /* Fallback for dbus1 connections: we
 150                          * unregister the name and wait for the
 151                          * response to come through for it */
 152                         if (r == -EOPNOTSUPP) {
 153
 154                                 /* Inform the service manager that we
 155                                  * are going down, so that it will
 156                                  * queue all further start requests,
 157                                  * instead of assuming we are already
 158                                  * running. */
 159                                 sd_notify(false, "STOPPING=1");
 160
 161                                 r = bus_async_unregister_and_exit(e, bus, name);
 162                                 if (r < 0)
 163                                         return r;
 164
 165                                 exiting = true;
 166                                 continue;
 167                         }
 168
 169                         if (r < 0)
 170                                 return r;
 171
 172                         sd_event_exit(e, 0);
 173                         break;
 174                 }
 175         }
 176
 177         r = sd_event_get_exit_code(e, &code);
 178         if (r < 0)
 179                 return r;
 180
 181         return code;
 182 }
 183 #endif // 0
 184
 185 int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
 186         _cleanup_(sd_bus_message_unrefp) sd_bus_message *rep = NULL;
 187         int r, has_owner = 0;
 188
 189         assert(c);
 190         assert(name);
 191
 192         r = sd_bus_call_method(c,
 193                                "org.freedesktop.DBus",
 194                                "/org/freedesktop/dbus",
 195                                "org.freedesktop.DBus",
 196                                "NameHasOwner",
 197                                error,
 198                                &rep,
 199                                "s",
 200                                name);
 201         if (r < 0)
 202                 return r;
 203
 204         r = sd_bus_message_read_basic(rep, 'b', &has_owner);
 205         if (r < 0)
 206                 return sd_bus_error_set_errno(error, r);
 207
 208         return has_owner;
 209 }
 210
 211 static int check_good_user(sd_bus_message *m, uid_t good_user) {
 212         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 213         uid_t sender_uid;
 214         int r;
 215
 216         assert(m);
 217
 218         if (good_user == UID_INVALID)
 219                 return 0;
 220
 221         r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
 222         if (r < 0)
 223                 return r;
 224
 225         /* Don't trust augmented credentials for authorization */
 226         assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
 227
 228         r = sd_bus_creds_get_euid(creds, &sender_uid);
 229         if (r < 0)
 230                 return r;
 231
 232         return sender_uid == good_user;
 233 }
 234
 235 int bus_test_polkit(
 236                 sd_bus_message *call,
 237                 int capability,
 238                 const char *action,
 239                 const char **details,
 240                 uid_t good_user,
 241                 bool *_challenge,
 242                 sd_bus_error *e) {
 243
 244         int r;
 245
 246         assert(call);
 247         assert(action);
 248
 249         /* Tests non-interactively! */
 250
 251         r = check_good_user(call, good_user);
 252         if (r != 0)
 253                 return r;
 254
 255         r = sd_bus_query_sender_privilege(call, capability);
 256         if (r < 0)
 257                 return r;
 258         else if (r > 0)
 259                 return 1;
 260 #ifdef ENABLE_POLKIT
 261         else {
 262                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *request = NULL;
 263                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 264                 int authorized = false, challenge = false;
 265                 const char *sender, **k, **v;
 266
 267                 sender = sd_bus_message_get_sender(call);
 268                 if (!sender)
 269                         return -EBADMSG;
 270
 271                 r = sd_bus_message_new_method_call(
 272                                 call->bus,
 273                                 &request,
 274                                 "org.freedesktop.PolicyKit1",
 275                                 "/org/freedesktop/PolicyKit1/Authority",
 276                                 "org.freedesktop.PolicyKit1.Authority",
 277                                 "CheckAuthorization");
 278                 if (r < 0)
 279                         return r;
 280
 281                 r = sd_bus_message_append(
 282                                 request,
 283                                 "(sa{sv})s",
 284                                 "system-bus-name", 1, "name", "s", sender,
 285                                 action);
 286                 if (r < 0)
 287                         return r;
 288
 289                 r = sd_bus_message_open_container(request, 'a', "{ss}");
 290                 if (r < 0)
 291                         return r;
 292
 293                 STRV_FOREACH_PAIR(k, v, details) {
 294                         r = sd_bus_message_append(request, "{ss}", *k, *v);
 295                         if (r < 0)
 296                                 return r;
 297                 }
 298
 299                 r = sd_bus_message_close_container(request);
 300                 if (r < 0)
 301                         return r;
 302
 303                 r = sd_bus_message_append(request, "us", 0, NULL);
 304                 if (r < 0)
 305                         return r;
 306
 307                 r = sd_bus_call(call->bus, request, 0, e, &reply);
 308                 if (r < 0) {
 309                         /* Treat no PK available as access denied */
 310                         if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
 311                                 sd_bus_error_free(e);
 312                                 return -EACCES;
 313                         }
 314
 315                         return r;
 316                 }
 317
 318                 r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
 319                 if (r < 0)
 320                         return r;
 321
 322                 r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
 323                 if (r < 0)
 324                         return r;
 325
 326                 if (authorized)
 327                         return 1;
 328
 329                 if (_challenge) {
 330                         *_challenge = challenge;
 331                         return 0;
 332                 }
 333         }
 334 #endif
 335
 336         return -EACCES;
 337 }
 338
 339 #ifdef ENABLE_POLKIT
 340
 341 typedef struct AsyncPolkitQuery {
 342         sd_bus_message *request, *reply;
 343         sd_bus_message_handler_t callback;
 344         void *userdata;
 345         sd_bus_slot *slot;
 346         Hashmap *registry;
 347 } AsyncPolkitQuery;
 348
 349 static void async_polkit_query_free(AsyncPolkitQuery *q) {
 350
 351         if (!q)
 352                 return;
 353
 354         sd_bus_slot_unref(q->slot);
 355
 356         if (q->registry && q->request)
 357                 hashmap_remove(q->registry, q->request);
 358
 359         sd_bus_message_unref(q->request);
 360         sd_bus_message_unref(q->reply);
 361
 362         free(q);
 363 }
 364
 365 static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
 366         _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
 367         AsyncPolkitQuery *q = userdata;
 368         int r;
 369
 370         assert(reply);
 371         assert(q);
 372
 373         q->slot = sd_bus_slot_unref(q->slot);
 374         q->reply = sd_bus_message_ref(reply);
 375
 376         r = sd_bus_message_rewind(q->request, true);
 377         if (r < 0) {
 378                 r = sd_bus_reply_method_errno(q->request, r, NULL);
 379                 goto finish;
 380         }
 381
 382         r = q->callback(q->request, q->userdata, &error_buffer);
 383         r = bus_maybe_reply_error(q->request, r, &error_buffer);
 384
 385 finish:
 386         async_polkit_query_free(q);
 387
 388         return r;
 389 }
 390
 391 #endif
 392
 393 int bus_verify_polkit_async(
 394                 sd_bus_message *call,
 395                 int capability,
 396                 const char *action,
 397                 const char **details,
 398                 bool interactive,
 399                 uid_t good_user,
 400                 Hashmap **registry,
 401                 sd_bus_error *error) {
 402
 403 #ifdef ENABLE_POLKIT
 404         _cleanup_(sd_bus_message_unrefp) sd_bus_message *pk = NULL;
 405         AsyncPolkitQuery *q;
 406         const char *sender, **k, **v;
 407         sd_bus_message_handler_t callback;
 408         void *userdata;
 409         int c;
 410 #endif
 411         int r;
 412
 413         assert(call);
 414         assert(action);
 415         assert(registry);
 416
 417         r = check_good_user(call, good_user);
 418         if (r != 0)
 419                 return r;
 420
 421 #ifdef ENABLE_POLKIT
 422         q = hashmap_get(*registry, call);
 423         if (q) {
 424                 int authorized, challenge;
 425
 426                 /* This is the second invocation of this function, and
 427                  * there's already a response from polkit, let's
 428                  * process it */
 429                 assert(q->reply);
 430
 431                 if (sd_bus_message_is_method_error(q->reply, NULL)) {
 432                         const sd_bus_error *e;
 433
 434                         /* Copy error from polkit reply */
 435                         e = sd_bus_message_get_error(q->reply);
 436                         sd_bus_error_copy(error, e);
 437
 438                         /* Treat no PK available as access denied */
 439                         if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
 440                                 return -EACCES;
 441
 442                         return -sd_bus_error_get_errno(e);
 443                 }
 444
 445                 r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
 446                 if (r >= 0)
 447                         r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
 448
 449                 if (r < 0)
 450                         return r;
 451
 452                 if (authorized)
 453                         return 1;
 454
 455                 if (challenge)
 456                         return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
 457
 458                 return -EACCES;
 459         }
 460 #endif
 461
 462         r = sd_bus_query_sender_privilege(call, capability);
 463         if (r < 0)
 464                 return r;
 465         else if (r > 0)
 466                 return 1;
 467
 468 #ifdef ENABLE_POLKIT
 469         if (sd_bus_get_current_message(call->bus) != call)
 470                 return -EINVAL;
 471
 472         callback = sd_bus_get_current_handler(call->bus);
 473         if (!callback)
 474                 return -EINVAL;
 475
 476         userdata = sd_bus_get_current_userdata(call->bus);
 477
 478         sender = sd_bus_message_get_sender(call);
 479         if (!sender)
 480                 return -EBADMSG;
 481
 482         c = sd_bus_message_get_allow_interactive_authorization(call);
 483         if (c < 0)
 484                 return c;
 485         if (c > 0)
 486                 interactive = true;
 487
 488         r = hashmap_ensure_allocated(registry, NULL);
 489         if (r < 0)
 490                 return r;
 491
 492         r = sd_bus_message_new_method_call(
 493                         call->bus,
 494                         &pk,
 495                         "org.freedesktop.PolicyKit1",
 496                         "/org/freedesktop/PolicyKit1/Authority",
 497                         "org.freedesktop.PolicyKit1.Authority",
 498                         "CheckAuthorization");
 499         if (r < 0)
 500                 return r;
 501
 502         r = sd_bus_message_append(
 503                         pk,
 504                         "(sa{sv})s",
 505                         "system-bus-name", 1, "name", "s", sender,
 506                         action);
 507         if (r < 0)
 508                 return r;
 509
 510         r = sd_bus_message_open_container(pk, 'a', "{ss}");
 511         if (r < 0)
 512                 return r;
 513
 514         STRV_FOREACH_PAIR(k, v, details) {
 515                 r = sd_bus_message_append(pk, "{ss}", *k, *v);
 516                 if (r < 0)
 517                         return r;
 518         }
 519
 520         r = sd_bus_message_close_container(pk);
 521         if (r < 0)
 522                 return r;
 523
 524         r = sd_bus_message_append(pk, "us", !!interactive, NULL);
 525         if (r < 0)
 526                 return r;
 527
 528         q = new0(AsyncPolkitQuery, 1);
 529         if (!q)
 530                 return -ENOMEM;
 531
 532         q->request = sd_bus_message_ref(call);
 533         q->callback = callback;
 534         q->userdata = userdata;
 535
 536         r = hashmap_put(*registry, call, q);
 537         if (r < 0) {
 538                 async_polkit_query_free(q);
 539                 return r;
 540         }
 541
 542         q->registry = *registry;
 543
 544         r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
 545         if (r < 0) {
 546                 async_polkit_query_free(q);
 547                 return r;
 548         }
 549
 550         return 0;
 551 #endif
 552
 553         return -EACCES;
 554 }
 555
 556 void bus_verify_polkit_async_registry_free(Hashmap *registry) {
 557 #ifdef ENABLE_POLKIT
 558         AsyncPolkitQuery *q;
 559
 560         while ((q = hashmap_steal_first(registry)))
 561                 async_polkit_query_free(q);
 562
 563         hashmap_free(registry);
 564 #endif
 565 }
 566
 567 #if 0 /// UNNEEDED by elogind
 568 int bus_check_peercred(sd_bus *c) {
 569         struct ucred ucred;
 570         socklen_t l;
 571         int fd;
 572
 573         assert(c);
 574
 575         fd = sd_bus_get_fd(c);
 576         if (fd < 0)
 577                 return fd;
 578
 579         l = sizeof(struct ucred);
 580         if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
 581                 return -errno;
 582
 583         if (l != sizeof(struct ucred))
 584                 return -E2BIG;
 585
 586         if (ucred.uid != 0 && ucred.uid != geteuid())
 587                 return -EPERM;
 588
 589         return 1;
 590 }
 591
 592 int bus_connect_system_systemd(sd_bus **_bus) {
 593         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 594         int r;
 595
 596         assert(_bus);
 597
 598         if (geteuid() != 0)
 599                 return sd_bus_default_system(_bus);
 600
 601         /* If we are root then let's talk directly to the system
 602          * instance, instead of going via the bus */
 603
 604         r = sd_bus_new(&bus);
 605         if (r < 0)
 606                 return r;
 607
 608         r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
 609         if (r < 0)
 610                 return r;
 611
 612         r = sd_bus_start(bus);
 613         if (r < 0)
 614                 return sd_bus_default_system(_bus);
 615
 616         r = bus_check_peercred(bus);
 617         if (r < 0)
 618                 return r;
 619
 620         *_bus = bus;
 621         bus = NULL;
 622
 623         return 0;
 624 }
 625
 626 int bus_connect_user_systemd(sd_bus **_bus) {
 627         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
 628         _cleanup_free_ char *ee = NULL;
 629         const char *e;
 630         int r;
 631
 632         assert(_bus);
 633
 634         e = secure_getenv("XDG_RUNTIME_DIR");
 635         if (!e)
 636                 return sd_bus_default_user(_bus);
 637
 638         ee = bus_address_escape(e);
 639         if (!ee)
 640                 return -ENOMEM;
 641
 642         r = sd_bus_new(&bus);
 643         if (r < 0)
 644                 return r;
 645
 646         bus->address = strjoin("unix:path=", ee, "/systemd/private");
 647         if (!bus->address)
 648                 return -ENOMEM;
 649
 650         r = sd_bus_start(bus);
 651         if (r < 0)
 652                 return sd_bus_default_user(_bus);
 653
 654         r = bus_check_peercred(bus);
 655         if (r < 0)
 656                 return r;
 657
 658         *_bus = bus;
 659         bus = NULL;
 660
 661         return 0;
 662 }
 663 #endif // 0
 664
 665 #define print_property(name, fmt, ...)                                  \
 666         do {                                                            \
 667                 if (value)                                              \
 668                         printf(fmt "\n", __VA_ARGS__);                  \
 669                 else                                                    \
 670                         printf("%s=" fmt "\n", name, __VA_ARGS__);      \
 671         } while(0)
 672
 673 int bus_print_property(const char *name, sd_bus_message *property, bool value, bool all) {
 674         char type;
 675         const char *contents;
 676         int r;
 677
 678         assert(name);
 679         assert(property);
 680
 681         r = sd_bus_message_peek_type(property, &type, &contents);
 682         if (r < 0)
 683                 return r;
 684
 685         switch (type) {
 686
 687         case SD_BUS_TYPE_STRING: {
 688                 const char *s;
 689
 690                 r = sd_bus_message_read_basic(property, type, &s);
 691                 if (r < 0)
 692                         return r;
 693
 694                 if (all || !isempty(s)) {
 695                         bool good;
 696
 697                         /* This property has a single value, so we need to take
 698                          * care not to print a new line, everything else is OK. */
 699                         good = !strchr(s, '\n');
 700                         print_property(name, "%s", good ? s : "[unprintable]");
 701                 }
 702
 703                 return 1;
 704         }
 705
 706         case SD_BUS_TYPE_BOOLEAN: {
 707                 int b;
 708
 709                 r = sd_bus_message_read_basic(property, type, &b);
 710                 if (r < 0)
 711                         return r;
 712
 713                 print_property(name, "%s", yes_no(b));
 714
 715                 return 1;
 716         }
 717
 718         case SD_BUS_TYPE_UINT64: {
 719                 uint64_t u;
 720
 721                 r = sd_bus_message_read_basic(property, type, &u);
 722                 if (r < 0)
 723                         return r;
 724
 725                 /* Yes, heuristics! But we can change this check
 726                  * should it turn out to not be sufficient */
 727
 728                 if (endswith(name, "Timestamp")) {
 729                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
 730
 731                         t = format_timestamp(timestamp, sizeof(timestamp), u);
 732                         if (t || all)
 733                                 print_property(name, "%s", strempty(t));
 734
 735                 } else if (strstr(name, "USec")) {
 736                         char timespan[FORMAT_TIMESPAN_MAX];
 737
 738                         print_property(name, "%s", format_timespan(timespan, sizeof(timespan), u, 0));
 739                 } else if (streq(name, "RestrictNamespaces")) {
 740                         _cleanup_free_ char *s = NULL;
 741                         const char *result;
 742
 743                         if ((u & NAMESPACE_FLAGS_ALL) == 0)
 744                                 result = "yes";
 745                         else if ((u & NAMESPACE_FLAGS_ALL) == NAMESPACE_FLAGS_ALL)
 746                                 result = "no";
 747                         else {
 748                                 r = namespace_flag_to_string_many(u, &s);
 749                                 if (r < 0)
 750                                         return r;
 751
 752                                 result = s;
 753                         }
 754
 755                         print_property(name, "%s", result);
 756
 757                 } else if (streq(name, "MountFlags")) {
 758                         const char *result;
 759
 760                         result = mount_propagation_flags_to_string(u);
 761                         if (!result)
 762                                 return -EINVAL;
 763
 764                         print_property(name, "%s", result);
 765
 766                 } else if (STR_IN_SET(name, "CapabilityBoundingSet", "AmbientCapabilities")) {
 767                         _cleanup_free_ char *s = NULL;
 768
 769                         r = capability_set_to_string_alloc(u, &s);
 770                         if (r < 0)
 771                                 return r;
 772
 773                         print_property(name, "%s", s);
 774
 775                 } else if ((STR_IN_SET(name, "CPUWeight", "StartupCPUWeight", "IOWeight", "StartupIOWeight") && u == CGROUP_WEIGHT_INVALID) ||
 776                            (STR_IN_SET(name, "CPUShares", "StartupCPUShares") && u == CGROUP_CPU_SHARES_INVALID) ||
 777                            (STR_IN_SET(name, "BlockIOWeight", "StartupBlockIOWeight") && u == CGROUP_BLKIO_WEIGHT_INVALID) ||
 778                            (STR_IN_SET(name, "MemoryCurrent", "TasksCurrent") && u == (uint64_t) -1) ||
 779                            (endswith(name, "NSec") && u == (uint64_t) -1))
 780
 781                         print_property(name, "%s", "[not set]");
 782
 783                 else if ((STR_IN_SET(name, "MemoryLow", "MemoryHigh", "MemoryMax", "MemorySwapMax", "MemoryLimit") && u == CGROUP_LIMIT_MAX) ||
 784                          (STR_IN_SET(name, "TasksMax", "DefaultTasksMax") && u == (uint64_t) -1) ||
 785                          (startswith(name, "Limit") && u == (uint64_t) -1) ||
 786                          (startswith(name, "DefaultLimit") && u == (uint64_t) -1))
 787
 788                         print_property(name, "%s", "infinity");
 789                 else
 790                         print_property(name, "%"PRIu64, u);
 791
 792                 return 1;
 793         }
 794
 795         case SD_BUS_TYPE_INT64: {
 796                 int64_t i;
 797
 798                 r = sd_bus_message_read_basic(property, type, &i);
 799                 if (r < 0)
 800                         return r;
 801
 802                 print_property(name, "%"PRIi64, i);
 803
 804                 return 1;
 805         }
 806
 807         case SD_BUS_TYPE_UINT32: {
 808                 uint32_t u;
 809
 810                 r = sd_bus_message_read_basic(property, type, &u);
 811                 if (r < 0)
 812                         return r;
 813
 814                 if (strstr(name, "UMask") || strstr(name, "Mode"))
 815                         print_property(name, "%04o", u);
 816                 else if (streq(name, "UID")) {
 817                         if (u == UID_INVALID)
 818                                 print_property(name, "%s", "[not set]");
 819                         else
 820                                 print_property(name, "%"PRIu32, u);
 821                 } else if (streq(name, "GID")) {
 822                         if (u == GID_INVALID)
 823                                 print_property(name, "%s", "[not set]");
 824                         else
 825                                 print_property(name, "%"PRIu32, u);
 826                 } else
 827                         print_property(name, "%"PRIu32, u);
 828
 829                 return 1;
 830         }
 831
 832         case SD_BUS_TYPE_INT32: {
 833                 int32_t i;
 834
 835                 r = sd_bus_message_read_basic(property, type, &i);
 836                 if (r < 0)
 837                         return r;
 838
 839                 print_property(name, "%"PRIi32, i);
 840                 return 1;
 841         }
 842
 843         case SD_BUS_TYPE_DOUBLE: {
 844                 double d;
 845
 846                 r = sd_bus_message_read_basic(property, type, &d);
 847                 if (r < 0)
 848                         return r;
 849
 850                 print_property(name, "%g", d);
 851                 return 1;
 852         }
 853
 854         case SD_BUS_TYPE_ARRAY:
 855                 if (streq(contents, "s")) {
 856                         bool first = true;
 857                         const char *str;
 858
 859                         r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
 860                         if (r < 0)
 861                                 return r;
 862
 863                         while ((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
 864                                 bool good;
 865
 866                                 if (first && !value)
 867                                         printf("%s=", name);
 868
 869                                 /* This property has multiple space-separated values, so
 870                                  * neither spaces not newlines can be allowed in a value. */
 871                                 good = str[strcspn(str, " \n")] == '\0';
 872
 873                                 printf("%s%s", first ? "" : " ", good ? str : "[unprintable]");
 874
 875                                 first = false;
 876                         }
 877                         if (r < 0)
 878                                 return r;
 879
 880                         if (first && all && !value)
 881                                 printf("%s=", name);
 882                         if (!first || all)
 883                                 puts("");
 884
 885                         r = sd_bus_message_exit_container(property);
 886                         if (r < 0)
 887                                 return r;
 888
 889                         return 1;
 890
 891                 } else if (streq(contents, "y")) {
 892                         const uint8_t *u;
 893                         size_t n;
 894
 895                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
 896                         if (r < 0)
 897                                 return r;
 898
 899                         if (all || n > 0) {
 900                                 unsigned int i;
 901
 902                                 if (!value)
 903                                         printf("%s=", name);
 904
 905                                 for (i = 0; i < n; i++)
 906                                         printf("%02x", u[i]);
 907
 908                                 puts("");
 909                         }
 910
 911                         return 1;
 912
 913                 } else if (streq(contents, "u")) {
 914                         uint32_t *u;
 915                         size_t n;
 916
 917                         r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
 918                         if (r < 0)
 919                                 return r;
 920
 921                         if (all || n > 0) {
 922                                 unsigned int i;
 923
 924                                 if (!value)
 925                                         printf("%s=", name);
 926
 927                                 for (i = 0; i < n; i++)
 928                                         printf("%08x", u[i]);
 929
 930                                 puts("");
 931                         }
 932
 933                         return 1;
 934                 }
 935
 936                 break;
 937         }
 938
 939         return 0;
 940 }
 941
 942 int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool value, bool all) {
 943         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 944         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 945         int r;
 946
 947         assert(bus);
 948         assert(path);
 949
 950         r = sd_bus_call_method(bus,
 951                         dest,
 952                         path,
 953                         "org.freedesktop.DBus.Properties",
 954                         "GetAll",
 955                         &error,
 956                         &reply,
 957                         "s", "");
 958         if (r < 0)
 959                 return r;
 960
 961         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
 962         if (r < 0)
 963                 return r;
 964
 965         while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
 966                 const char *name;
 967                 const char *contents;
 968
 969                 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
 970                 if (r < 0)
 971                         return r;
 972
 973                 if (!filter || strv_find(filter, name)) {
 974                         r = sd_bus_message_peek_type(reply, NULL, &contents);
 975                         if (r < 0)
 976                                 return r;
 977
 978                         r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
 979                         if (r < 0)
 980                                 return r;
 981
 982                         r = bus_print_property(name, reply, value, all);
 983                         if (r < 0)
 984                                 return r;
 985                         if (r == 0) {
 986                                 if (all)
 987                                         printf("%s=[unprintable]\n", name);
 988                                 /* skip what we didn't read */
 989                                 r = sd_bus_message_skip(reply, contents);
 990                                 if (r < 0)
 991                                         return r;
 992                         }
 993
 994                         r = sd_bus_message_exit_container(reply);
 995                         if (r < 0)
 996                                 return r;
 997                 } else {
 998                         r = sd_bus_message_skip(reply, "v");
 999                         if (r < 0)
1000                                 return r;
1001                 }
1002
1003                 r = sd_bus_message_exit_container(reply);
1004                 if (r < 0)
1005                         return r;
1006         }
1007         if (r < 0)
1008                 return r;
1009
1010         r = sd_bus_message_exit_container(reply);
1011         if (r < 0)
1012                 return r;
1013
1014         return 0;
1015 }
1016
1017 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1018         sd_id128_t *p = userdata;
1019         const void *v;
1020         size_t n;
1021         int r;
1022
1023         r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1024         if (r < 0)
1025                 return r;
1026
1027         if (n == 0)
1028                 *p = SD_ID128_NULL;
1029         else if (n == 16)
1030                 memcpy((*p).bytes, v, n);
1031         else
1032                 return -EINVAL;
1033
1034         return 0;
1035 }
1036
1037 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1038         char type;
1039         int r;
1040
1041         r = sd_bus_message_peek_type(m, &type, NULL);
1042         if (r < 0)
1043                 return r;
1044
1045         switch (type) {
1046
1047         case SD_BUS_TYPE_STRING: {
1048                 char **p = userdata;
1049                 const char *s;
1050
1051                 r = sd_bus_message_read_basic(m, type, &s);
1052                 if (r < 0)
1053                         return r;
1054
1055                 if (isempty(s))
1056                         s = NULL;
1057
1058                 return free_and_strdup(p, s);
1059         }
1060
1061         case SD_BUS_TYPE_ARRAY: {
1062                 _cleanup_strv_free_ char **l = NULL;
1063                 char ***p = userdata;
1064
1065                 r = bus_message_read_strv_extend(m, &l);
1066                 if (r < 0)
1067                         return r;
1068
1069                 strv_free(*p);
1070                 *p = l;
1071                 l = NULL;
1072                 return 0;
1073         }
1074
1075         case SD_BUS_TYPE_BOOLEAN: {
1076                 unsigned b;
1077                 int *p = userdata;
1078
1079                 r = sd_bus_message_read_basic(m, type, &b);
1080                 if (r < 0)
1081                         return r;
1082
1083                 *p = b;
1084                 return 0;
1085         }
1086
1087         case SD_BUS_TYPE_INT32:
1088         case SD_BUS_TYPE_UINT32: {
1089                 uint32_t u, *p = userdata;
1090
1091                 r = sd_bus_message_read_basic(m, type, &u);
1092                 if (r < 0)
1093                         return r;
1094
1095                 *p = u;
1096                 return 0;
1097         }
1098
1099         case SD_BUS_TYPE_INT64:
1100         case SD_BUS_TYPE_UINT64: {
1101                 uint64_t t, *p = userdata;
1102
1103                 r = sd_bus_message_read_basic(m, type, &t);
1104                 if (r < 0)
1105                         return r;
1106
1107                 *p = t;
1108                 return 0;
1109         }
1110
1111         case SD_BUS_TYPE_DOUBLE: {
1112                 double d, *p = userdata;
1113
1114                 r = sd_bus_message_read_basic(m, type, &d);
1115                 if (r < 0)
1116                         return r;
1117
1118                 *p = d;
1119                 return 0;
1120         }}
1121
1122         return -EOPNOTSUPP;
1123 }
1124
1125 int bus_message_map_all_properties(
1126                 sd_bus_message *m,
1127                 const struct bus_properties_map *map,
1128                 sd_bus_error *error,
1129                 void *userdata) {
1130
1131         int r;
1132
1133         assert(m);
1134         assert(map);
1135
1136         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1137         if (r < 0)
1138                 return r;
1139
1140         while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1141                 const struct bus_properties_map *prop;
1142                 const char *member;
1143                 const char *contents;
1144                 void *v;
1145                 unsigned i;
1146
1147                 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1148                 if (r < 0)
1149                         return r;
1150
1151                 for (i = 0, prop = NULL; map[i].member; i++)
1152                         if (streq(map[i].member, member)) {
1153                                 prop = &map[i];
1154                                 break;
1155                         }
1156
1157                 if (prop) {
1158                         r = sd_bus_message_peek_type(m, NULL, &contents);
1159                         if (r < 0)
1160                                 return r;
1161
1162                         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1163                         if (r < 0)
1164                                 return r;
1165
1166                         v = (uint8_t *)userdata + prop->offset;
1167                         if (map[i].set)
1168                                 r = prop->set(sd_bus_message_get_bus(m), member, m, error, v);
1169                         else
1170                                 r = map_basic(sd_bus_message_get_bus(m), member, m, error, v);
1171                         if (r < 0)
1172                                 return r;
1173
1174                         r = sd_bus_message_exit_container(m);
1175                         if (r < 0)
1176                                 return r;
1177                 } else {
1178                         r = sd_bus_message_skip(m, "v");
1179                         if (r < 0)
1180                                 return r;
1181                 }
1182
1183                 r = sd_bus_message_exit_container(m);
1184                 if (r < 0)
1185                         return r;
1186         }
1187         if (r < 0)
1188                 return r;
1189
1190         return sd_bus_message_exit_container(m);
1191 }
1192
1193 #if 0 /// UNNEEDED by elogind
1194 int bus_message_map_properties_changed(
1195                 sd_bus_message *m,
1196                 const struct bus_properties_map *map,
1197                 sd_bus_error *error,
1198                 void *userdata) {
1199
1200         const char *member;
1201         int r, invalidated, i;
1202
1203         assert(m);
1204         assert(map);
1205
1206         r = bus_message_map_all_properties(m, map, error, userdata);
1207         if (r < 0)
1208                 return r;
1209
1210         r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1211         if (r < 0)
1212                 return r;
1213
1214         invalidated = 0;
1215         while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1216                 for (i = 0; map[i].member; i++)
1217                         if (streq(map[i].member, member)) {
1218                                 ++invalidated;
1219                                 break;
1220                         }
1221         if (r < 0)
1222                 return r;
1223
1224         r = sd_bus_message_exit_container(m);
1225         if (r < 0)
1226                 return r;
1227
1228         return invalidated;
1229 }
1230 #endif // 0
1231
1232 int bus_map_all_properties(
1233                 sd_bus *bus,
1234                 const char *destination,
1235                 const char *path,
1236                 const struct bus_properties_map *map,
1237                 sd_bus_error *error,
1238                 void *userdata) {
1239
1240         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1241         int r;
1242
1243         assert(bus);
1244         assert(destination);
1245         assert(path);
1246         assert(map);
1247
1248         r = sd_bus_call_method(
1249                         bus,
1250                         destination,
1251                         path,
1252                         "org.freedesktop.DBus.Properties",
1253                         "GetAll",
1254                         error,
1255                         &m,
1256                         "s", "");
1257         if (r < 0)
1258                 return r;
1259
1260         return bus_message_map_all_properties(m, map, error, userdata);
1261 }
1262
1263 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
1264         _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
1265         int r;
1266
1267         assert(transport >= 0);
1268         assert(transport < _BUS_TRANSPORT_MAX);
1269         assert(ret);
1270
1271         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1272         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1273
1274         switch (transport) {
1275
1276         case BUS_TRANSPORT_LOCAL:
1277 #if 0 /// elogind does not support a user bus
1278                 if (user)
1279                         r = sd_bus_default_user(&bus);
1280                 else
1281 #endif // 0
1282                         r = sd_bus_default_system(&bus);
1283
1284                 break;
1285
1286         case BUS_TRANSPORT_REMOTE:
1287                 r = sd_bus_open_system_remote(&bus, host);
1288                 break;
1289
1290         case BUS_TRANSPORT_MACHINE:
1291                 r = sd_bus_open_system_machine(&bus, host);
1292                 break;
1293
1294         default:
1295                 assert_not_reached("Hmm, unknown transport type.");
1296         }
1297         if (r < 0)
1298                 return r;
1299
1300         r = sd_bus_set_exit_on_disconnect(bus, true);
1301         if (r < 0)
1302                 return r;
1303
1304         *ret = bus;
1305         bus = NULL;
1306
1307         return 0;
1308 }
1309
1310 #if 0 /// UNNEEDED by elogind
1311 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1312         int r;
1313
1314         assert(transport >= 0);
1315         assert(transport < _BUS_TRANSPORT_MAX);
1316         assert(bus);
1317
1318         assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1319         assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1320
1321         switch (transport) {
1322
1323         case BUS_TRANSPORT_LOCAL:
1324                 if (user)
1325                         r = bus_connect_user_systemd(bus);
1326                 else
1327                         r = bus_connect_system_systemd(bus);
1328
1329                 break;
1330
1331         case BUS_TRANSPORT_REMOTE:
1332                 r = sd_bus_open_system_remote(bus, host);
1333                 break;
1334
1335         case BUS_TRANSPORT_MACHINE:
1336                 r = sd_bus_open_system_machine(bus, host);
1337                 break;
1338
1339         default:
1340                 assert_not_reached("Hmm, unknown transport type.");
1341         }
1342
1343         return r;
1344 }
1345 #endif // 0
1346
1347 int bus_property_get_bool(
1348                 sd_bus *bus,
1349                 const char *path,
1350                 const char *interface,
1351                 const char *property,
1352                 sd_bus_message *reply,
1353                 void *userdata,
1354                 sd_bus_error *error) {
1355
1356         int b = *(bool*) userdata;
1357
1358         return sd_bus_message_append_basic(reply, 'b', &b);
1359 }
1360
1361 #if 0 /// UNNEEDED by elogind
1362 int bus_property_get_id128(
1363                 sd_bus *bus,
1364                 const char *path,
1365                 const char *interface,
1366                 const char *property,
1367                 sd_bus_message *reply,
1368                 void *userdata,
1369                 sd_bus_error *error) {
1370
1371         sd_id128_t *id = userdata;
1372
1373         if (sd_id128_is_null(*id)) /* Add an empty array if the ID is zero */
1374                 return sd_bus_message_append(reply, "ay", 0);
1375         else
1376                 return sd_bus_message_append_array(reply, 'y', id->bytes, 16);
1377 }
1378 #endif // 0
1379
1380 #if __SIZEOF_SIZE_T__ != 8
1381 int bus_property_get_size(
1382                 sd_bus *bus,
1383                 const char *path,
1384                 const char *interface,
1385                 const char *property,
1386                 sd_bus_message *reply,
1387                 void *userdata,
1388                 sd_bus_error *error) {
1389
1390         uint64_t sz = *(size_t*) userdata;
1391
1392         return sd_bus_message_append_basic(reply, 't', &sz);
1393 }
1394 #endif
1395
1396 #if __SIZEOF_LONG__ != 8
1397 int bus_property_get_long(
1398                 sd_bus *bus,
1399                 const char *path,
1400                 const char *interface,
1401                 const char *property,
1402                 sd_bus_message *reply,
1403                 void *userdata,
1404                 sd_bus_error *error) {
1405
1406         int64_t l = *(long*) userdata;
1407
1408         return sd_bus_message_append_basic(reply, 'x', &l);
1409 }
1410
1411 int bus_property_get_ulong(
1412                 sd_bus *bus,
1413                 const char *path,
1414                 const char *interface,
1415                 const char *property,
1416                 sd_bus_message *reply,
1417                 void *userdata,
1418                 sd_bus_error *error) {
1419
1420         uint64_t ul = *(unsigned long*) userdata;
1421
1422         return sd_bus_message_append_basic(reply, 't', &ul);
1423 }
1424 #endif
1425
1426 int bus_log_parse_error(int r) {
1427         return log_error_errno(r, "Failed to parse bus message: %m");
1428 }
1429
1430 #if 0 /// UNNEEDED by elogind
1431 int bus_log_create_error(int r) {
1432         return log_error_errno(r, "Failed to create bus message: %m");
1433 }
1434
1435 #endif // 0
1436 #if 0 /// UNNEEDED by elogind
1437 /**
1438  * bus_path_encode_unique() - encode unique object path
1439  * @b: bus connection or NULL
1440  * @prefix: object path prefix
1441  * @sender_id: unique-name of client, or NULL
1442  * @external_id: external ID to be chosen by client, or NULL
1443  * @ret_path: storage for encoded object path pointer
1444  *
1445  * Whenever we provide a bus API that allows clients to create and manage
1446  * server-side objects, we need to provide a unique name for these objects. If
1447  * we let the server choose the name, we suffer from a race condition: If a
1448  * client creates an object asynchronously, it cannot destroy that object until
1449  * it received the method reply. It cannot know the name of the new object,
1450  * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1451  *
1452  * Therefore, many APIs allow the client to choose the unique name for newly
1453  * created objects. There're two problems to solve, though:
1454  *    1) Object names are usually defined via dbus object paths, which are
1455  *       usually globally namespaced. Therefore, multiple clients must be able
1456  *       to choose unique object names without interference.
1457  *    2) If multiple libraries share the same bus connection, they must be
1458  *       able to choose unique object names without interference.
1459  * The first problem is solved easily by prefixing a name with the
1460  * unique-bus-name of a connection. The server side must enforce this and
1461  * reject any other name. The second problem is solved by providing unique
1462  * suffixes from within sd-bus.
1463  *
1464  * This helper allows clients to create unique object-paths. It uses the
1465  * template '/prefix/sender_id/external_id' and returns the new path in
1466  * @ret_path (must be freed by the caller).
1467  * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1468  * NULL, this function allocates a unique suffix via @b (by requesting a new
1469  * cookie). If both @sender_id and @external_id are given, @b can be passed as
1470  * NULL.
1471  *
1472  * Returns: 0 on success, negative error code on failure.
1473  */
1474 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1475         _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1476         char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1477         int r;
1478
1479         assert_return(b || (sender_id && external_id), -EINVAL);
1480         assert_return(object_path_is_valid(prefix), -EINVAL);
1481         assert_return(ret_path, -EINVAL);
1482
1483         if (!sender_id) {
1484                 r = sd_bus_get_unique_name(b, &sender_id);
1485                 if (r < 0)
1486                         return r;
1487         }
1488
1489         if (!external_id) {
1490                 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1491                 external_id = external_buf;
1492         }
1493
1494         sender_label = bus_label_escape(sender_id);
1495         if (!sender_label)
1496                 return -ENOMEM;
1497
1498         external_label = bus_label_escape(external_id);
1499         if (!external_label)
1500                 return -ENOMEM;
1501
1502         p = strjoin(prefix, "/", sender_label, "/", external_label);
1503         if (!p)
1504                 return -ENOMEM;
1505
1506         *ret_path = p;
1507         return 0;
1508 }
1509
1510 /**
1511  * bus_path_decode_unique() - decode unique object path
1512  * @path: object path to decode
1513  * @prefix: object path prefix
1514  * @ret_sender: output parameter for sender-id label
1515  * @ret_external: output parameter for external-id label
1516  *
1517  * This does the reverse of bus_path_encode_unique() (see its description for
1518  * details). Both trailing labels, sender-id and external-id, are unescaped and
1519  * returned in the given output parameters (the caller must free them).
1520  *
1521  * Note that this function returns 0 if the path does not match the template
1522  * (see bus_path_encode_unique()), 1 if it matched.
1523  *
1524  * Returns: Negative error code on failure, 0 if the given object path does not
1525  *          match the template (return parameters are set to NULL), 1 if it was
1526  *          parsed successfully (return parameters contain allocated labels).
1527  */
1528 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1529         const char *p, *q;
1530         char *sender, *external;
1531
1532         assert(object_path_is_valid(path));
1533         assert(object_path_is_valid(prefix));
1534         assert(ret_sender);
1535         assert(ret_external);
1536
1537         p = object_path_startswith(path, prefix);
1538         if (!p) {
1539                 *ret_sender = NULL;
1540                 *ret_external = NULL;
1541                 return 0;
1542         }
1543
1544         q = strchr(p, '/');
1545         if (!q) {
1546                 *ret_sender = NULL;
1547                 *ret_external = NULL;
1548                 return 0;
1549         }
1550
1551         sender = bus_label_unescape_n(p, q - p);
1552         external = bus_label_unescape(q + 1);
1553         if (!sender || !external) {
1554                 free(sender);
1555                 free(external);
1556                 return -ENOMEM;
1557         }
1558
1559         *ret_sender = sender;
1560         *ret_external = external;
1561         return 1;
1562 }
1563 #endif // 0
1564
1565 #if 0 /// UNNEEDED by elogind
1566 int bus_property_get_rlimit(
1567                 sd_bus *bus,
1568                 const char *path,
1569                 const char *interface,
1570                 const char *property,
1571                 sd_bus_message *reply,
1572                 void *userdata,
1573                 sd_bus_error *error) {
1574
1575         struct rlimit *rl;
1576         uint64_t u;
1577         rlim_t x;
1578         const char *is_soft;
1579
1580         assert(bus);
1581         assert(reply);
1582         assert(userdata);
1583
1584         is_soft = endswith(property, "Soft");
1585         rl = *(struct rlimit**) userdata;
1586         if (rl)
1587                 x = is_soft ? rl->rlim_cur : rl->rlim_max;
1588         else {
1589                 struct rlimit buf = {};
1590                 int z;
1591                 const char *s;
1592
1593                 s = is_soft ? strndupa(property, is_soft - property) : property;
1594
1595                 z = rlimit_from_string(strstr(s, "Limit"));
1596                 assert(z >= 0);
1597
1598                 getrlimit(z, &buf);
1599                 x = is_soft ? buf.rlim_cur : buf.rlim_max;
1600         }
1601
1602         /* rlim_t might have different sizes, let's map
1603          * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
1604          * all archs */
1605         u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
1606
1607         return sd_bus_message_append(reply, "t", u);
1608 }
1609
1610 int bus_track_add_name_many(sd_bus_track *t, char **l) {
1611         int r = 0;
1612         char **i;
1613
1614         assert(t);
1615
1616         /* Continues adding after failure, and returns the first failure. */
1617
1618         STRV_FOREACH(i, l) {
1619                 int k;
1620
1621                 k = sd_bus_track_add_name(t, *i);
1622                 if (k < 0 && r >= 0)
1623                         r = k;
1624         }
1625
1626         return r;
1627 }
1628 #endif // 0