src/libsystemd/sd-bus/bus-creds.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <stdlib.h>
  23 #include <linux/capability.h>
  24
  25 #include "util.h"
  26 #include "formats-util.h"
  27 #include "process-util.h"
  28 #include "terminal-util.h"
  29 #include "capability.h"
  30 #include "cgroup-util.h"
  31 #include "fileio.h"
  32 #include "audit.h"
  33 #include "bus-message.h"
  34 #include "strv.h"
  35 #include "bus-creds.h"
  36 #include "bus-label.h"
  37 #include "bus-internal.h"
  38
  39 enum {
  40         CAP_OFFSET_INHERITABLE = 0,
  41         CAP_OFFSET_PERMITTED = 1,
  42         CAP_OFFSET_EFFECTIVE = 2,
  43         CAP_OFFSET_BOUNDING = 3
  44 };
  45
  46 void bus_creds_done(sd_bus_creds *c) {
  47         assert(c);
  48
  49         /* For internal bus cred structures that are allocated by
  50          * something else */
  51
  52         free(c->session);
  53         free(c->unit);
  54         free(c->user_unit);
  55         free(c->slice);
  56         free(c->user_slice);
  57         free(c->unescaped_description);
  58         free(c->supplementary_gids);
  59         free(c->tty);
  60
  61         free(c->well_known_names); /* note that this is an strv, but
  62                                     * we only free the array, not the
  63                                     * strings the array points to. The
  64                                     * full strv we only free if
  65                                     * c->allocated is set, see
  66                                     * below. */
  67
  68         strv_free(c->cmdline_array);
  69 }
  70
  71 _public_ sd_bus_creds *sd_bus_creds_ref(sd_bus_creds *c) {
  72         assert_return(c, NULL);
  73
  74         if (c->allocated) {
  75                 assert(c->n_ref > 0);
  76                 c->n_ref++;
  77         } else {
  78                 sd_bus_message *m;
  79
  80                 /* If this is an embedded creds structure, then
  81                  * forward ref counting to the message */
  82                 m = container_of(c, sd_bus_message, creds);
  83                 sd_bus_message_ref(m);
  84         }
  85
  86         return c;
  87 }
  88
  89 _public_ sd_bus_creds *sd_bus_creds_unref(sd_bus_creds *c) {
  90
  91         if (!c)
  92                 return NULL;
  93
  94         if (c->allocated) {
  95                 assert(c->n_ref > 0);
  96                 c->n_ref--;
  97
  98                 if (c->n_ref == 0) {
  99                         free(c->comm);
 100                         free(c->tid_comm);
 101                         free(c->exe);
 102                         free(c->cmdline);
 103                         free(c->cgroup);
 104                         free(c->capability);
 105                         free(c->label);
 106                         free(c->unique_name);
 107                         free(c->cgroup_root);
 108                         free(c->description);
 109
 110                         free(c->supplementary_gids);
 111                         c->supplementary_gids = NULL;
 112
 113                         strv_free(c->well_known_names);
 114                         c->well_known_names = NULL;
 115
 116                         bus_creds_done(c);
 117
 118                         free(c);
 119                 }
 120         } else {
 121                 sd_bus_message *m;
 122
 123                 m = container_of(c, sd_bus_message, creds);
 124                 sd_bus_message_unref(m);
 125         }
 126
 127
 128         return NULL;
 129 }
 130
 131 _public_ uint64_t sd_bus_creds_get_mask(const sd_bus_creds *c) {
 132         assert_return(c, 0);
 133
 134         return c->mask;
 135 }
 136
 137 _public_ uint64_t sd_bus_creds_get_augmented_mask(const sd_bus_creds *c) {
 138         assert_return(c, 0);
 139
 140         return c->augmented;
 141 }
 142
 143 sd_bus_creds* bus_creds_new(void) {
 144         sd_bus_creds *c;
 145
 146         c = new0(sd_bus_creds, 1);
 147         if (!c)
 148                 return NULL;
 149
 150         c->allocated = true;
 151         c->n_ref = 1;
 152         return c;
 153 }
 154
 155 _public_ int sd_bus_creds_new_from_pid(sd_bus_creds **ret, pid_t pid, uint64_t mask) {
 156         sd_bus_creds *c;
 157         int r;
 158
 159         assert_return(pid >= 0, -EINVAL);
 160         assert_return(mask <= _SD_BUS_CREDS_ALL, -EOPNOTSUPP);
 161         assert_return(ret, -EINVAL);
 162
 163         if (pid == 0)
 164                 pid = getpid();
 165
 166         c = bus_creds_new();
 167         if (!c)
 168                 return -ENOMEM;
 169
 170         r = bus_creds_add_more(c, mask | SD_BUS_CREDS_AUGMENT, pid, 0);
 171         if (r < 0) {
 172                 sd_bus_creds_unref(c);
 173                 return r;
 174         }
 175
 176         /* Check if the process existed at all, in case we haven't
 177          * figured that out already */
 178         if (!pid_is_alive(pid)) {
 179                 sd_bus_creds_unref(c);
 180                 return -ESRCH;
 181         }
 182
 183         *ret = c;
 184         return 0;
 185 }
 186
 187 _public_ int sd_bus_creds_get_uid(sd_bus_creds *c, uid_t *uid) {
 188         assert_return(c, -EINVAL);
 189         assert_return(uid, -EINVAL);
 190
 191         if (!(c->mask & SD_BUS_CREDS_UID))
 192                 return -ENODATA;
 193
 194         *uid = c->uid;
 195         return 0;
 196 }
 197
 198 _public_ int sd_bus_creds_get_euid(sd_bus_creds *c, uid_t *euid) {
 199         assert_return(c, -EINVAL);
 200         assert_return(euid, -EINVAL);
 201
 202         if (!(c->mask & SD_BUS_CREDS_EUID))
 203                 return -ENODATA;
 204
 205         *euid = c->euid;
 206         return 0;
 207 }
 208
 209 _public_ int sd_bus_creds_get_suid(sd_bus_creds *c, uid_t *suid) {
 210         assert_return(c, -EINVAL);
 211         assert_return(suid, -EINVAL);
 212
 213         if (!(c->mask & SD_BUS_CREDS_SUID))
 214                 return -ENODATA;
 215
 216         *suid = c->suid;
 217         return 0;
 218 }
 219
 220
 221 _public_ int sd_bus_creds_get_fsuid(sd_bus_creds *c, uid_t *fsuid) {
 222         assert_return(c, -EINVAL);
 223         assert_return(fsuid, -EINVAL);
 224
 225         if (!(c->mask & SD_BUS_CREDS_FSUID))
 226                 return -ENODATA;
 227
 228         *fsuid = c->fsuid;
 229         return 0;
 230 }
 231
 232 _public_ int sd_bus_creds_get_gid(sd_bus_creds *c, gid_t *gid) {
 233         assert_return(c, -EINVAL);
 234         assert_return(gid, -EINVAL);
 235
 236         if (!(c->mask & SD_BUS_CREDS_GID))
 237                 return -ENODATA;
 238
 239         *gid = c->gid;
 240         return 0;
 241 }
 242
 243 _public_ int sd_bus_creds_get_egid(sd_bus_creds *c, gid_t *egid) {
 244         assert_return(c, -EINVAL);
 245         assert_return(egid, -EINVAL);
 246
 247         if (!(c->mask & SD_BUS_CREDS_EGID))
 248                 return -ENODATA;
 249
 250         *egid = c->egid;
 251         return 0;
 252 }
 253
 254 _public_ int sd_bus_creds_get_sgid(sd_bus_creds *c, gid_t *sgid) {
 255         assert_return(c, -EINVAL);
 256         assert_return(sgid, -EINVAL);
 257
 258         if (!(c->mask & SD_BUS_CREDS_SGID))
 259                 return -ENODATA;
 260
 261         *sgid = c->sgid;
 262         return 0;
 263 }
 264
 265 _public_ int sd_bus_creds_get_fsgid(sd_bus_creds *c, gid_t *fsgid) {
 266         assert_return(c, -EINVAL);
 267         assert_return(fsgid, -EINVAL);
 268
 269         if (!(c->mask & SD_BUS_CREDS_FSGID))
 270                 return -ENODATA;
 271
 272         *fsgid = c->fsgid;
 273         return 0;
 274 }
 275
 276 _public_ int sd_bus_creds_get_supplementary_gids(sd_bus_creds *c, const gid_t **gids) {
 277         assert_return(c, -EINVAL);
 278         assert_return(gids, -EINVAL);
 279
 280         if (!(c->mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS))
 281                 return -ENODATA;
 282
 283         *gids = c->supplementary_gids;
 284         return (int) c->n_supplementary_gids;
 285 }
 286
 287 _public_ int sd_bus_creds_get_pid(sd_bus_creds *c, pid_t *pid) {
 288         assert_return(c, -EINVAL);
 289         assert_return(pid, -EINVAL);
 290
 291         if (!(c->mask & SD_BUS_CREDS_PID))
 292                 return -ENODATA;
 293
 294         assert(c->pid > 0);
 295         *pid = c->pid;
 296         return 0;
 297 }
 298
 299 _public_ int sd_bus_creds_get_ppid(sd_bus_creds *c, pid_t *ppid) {
 300         assert_return(c, -EINVAL);
 301         assert_return(ppid, -EINVAL);
 302
 303         if (!(c->mask & SD_BUS_CREDS_PPID))
 304                 return -ENODATA;
 305
 306         /* PID 1 has no parent process. Let's distinguish the case of
 307          * not knowing and not having a parent process by the returned
 308          * error code. */
 309         if (c->ppid == 0)
 310                 return -ENXIO;
 311
 312         *ppid = c->ppid;
 313         return 0;
 314 }
 315
 316 _public_ int sd_bus_creds_get_tid(sd_bus_creds *c, pid_t *tid) {
 317         assert_return(c, -EINVAL);
 318         assert_return(tid, -EINVAL);
 319
 320         if (!(c->mask & SD_BUS_CREDS_TID))
 321                 return -ENODATA;
 322
 323         assert(c->tid > 0);
 324         *tid = c->tid;
 325         return 0;
 326 }
 327
 328 _public_ int sd_bus_creds_get_selinux_context(sd_bus_creds *c, const char **ret) {
 329         assert_return(c, -EINVAL);
 330
 331         if (!(c->mask & SD_BUS_CREDS_SELINUX_CONTEXT))
 332                 return -ENODATA;
 333
 334         assert(c->label);
 335         *ret = c->label;
 336         return 0;
 337 }
 338
 339 _public_ int sd_bus_creds_get_comm(sd_bus_creds *c, const char **ret) {
 340         assert_return(c, -EINVAL);
 341         assert_return(ret, -EINVAL);
 342
 343         if (!(c->mask & SD_BUS_CREDS_COMM))
 344                 return -ENODATA;
 345
 346         assert(c->comm);
 347         *ret = c->comm;
 348         return 0;
 349 }
 350
 351 _public_ int sd_bus_creds_get_tid_comm(sd_bus_creds *c, const char **ret) {
 352         assert_return(c, -EINVAL);
 353         assert_return(ret, -EINVAL);
 354
 355         if (!(c->mask & SD_BUS_CREDS_TID_COMM))
 356                 return -ENODATA;
 357
 358         assert(c->tid_comm);
 359         *ret = c->tid_comm;
 360         return 0;
 361 }
 362
 363 _public_ int sd_bus_creds_get_exe(sd_bus_creds *c, const char **ret) {
 364         assert_return(c, -EINVAL);
 365         assert_return(ret, -EINVAL);
 366
 367         if (!(c->mask & SD_BUS_CREDS_EXE))
 368                 return -ENODATA;
 369
 370         if (!c->exe)
 371                 return -ENXIO;
 372
 373         *ret = c->exe;
 374         return 0;
 375 }
 376
 377 _public_ int sd_bus_creds_get_cgroup(sd_bus_creds *c, const char **ret) {
 378         assert_return(c, -EINVAL);
 379         assert_return(ret, -EINVAL);
 380
 381         if (!(c->mask & SD_BUS_CREDS_CGROUP))
 382                 return -ENODATA;
 383
 384         assert(c->cgroup);
 385         *ret = c->cgroup;
 386         return 0;
 387 }
 388
 389 _public_ int sd_bus_creds_get_unit(sd_bus_creds *c, const char **ret) {
 390         int r;
 391
 392         assert_return(c, -EINVAL);
 393         assert_return(ret, -EINVAL);
 394
 395         if (!(c->mask & SD_BUS_CREDS_UNIT))
 396                 return -ENODATA;
 397
 398         assert(c->cgroup);
 399
 400         if (!c->unit) {
 401                 const char *shifted;
 402
 403                 r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted);
 404                 if (r < 0)
 405                         return r;
 406
 407                 r = cg_path_get_unit(shifted, (char**) &c->unit);
 408                 if (r < 0)
 409                         return r;
 410         }
 411
 412         *ret = c->unit;
 413         return 0;
 414 }
 415
 416 _public_ int sd_bus_creds_get_user_unit(sd_bus_creds *c, const char **ret) {
 417         int r;
 418
 419         assert_return(c, -EINVAL);
 420         assert_return(ret, -EINVAL);
 421
 422         if (!(c->mask & SD_BUS_CREDS_USER_UNIT))
 423                 return -ENODATA;
 424
 425         assert(c->cgroup);
 426
 427         if (!c->user_unit) {
 428                 const char *shifted;
 429
 430                 r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted);
 431                 if (r < 0)
 432                         return r;
 433
 434                 r = cg_path_get_user_unit(shifted, (char**) &c->user_unit);
 435                 if (r < 0)
 436                         return r;
 437         }
 438
 439         *ret = c->user_unit;
 440         return 0;
 441 }
 442
 443 _public_ int sd_bus_creds_get_slice(sd_bus_creds *c, const char **ret) {
 444         int r;
 445
 446         assert_return(c, -EINVAL);
 447         assert_return(ret, -EINVAL);
 448
 449         if (!(c->mask & SD_BUS_CREDS_SLICE))
 450                 return -ENODATA;
 451
 452         assert(c->cgroup);
 453
 454         if (!c->slice) {
 455                 const char *shifted;
 456
 457                 r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted);
 458                 if (r < 0)
 459                         return r;
 460
 461                 r = cg_path_get_slice(shifted, (char**) &c->slice);
 462                 if (r < 0)
 463                         return r;
 464         }
 465
 466         *ret = c->slice;
 467         return 0;
 468 }
 469
 470 _public_ int sd_bus_creds_get_user_slice(sd_bus_creds *c, const char **ret) {
 471         int r;
 472
 473         assert_return(c, -EINVAL);
 474         assert_return(ret, -EINVAL);
 475
 476         if (!(c->mask & SD_BUS_CREDS_USER_SLICE))
 477                 return -ENODATA;
 478
 479         assert(c->cgroup);
 480
 481         if (!c->user_slice) {
 482                 const char *shifted;
 483
 484                 r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted);
 485                 if (r < 0)
 486                         return r;
 487
 488                 r = cg_path_get_user_slice(shifted, (char**) &c->user_slice);
 489                 if (r < 0)
 490                         return r;
 491         }
 492
 493         *ret = c->user_slice;
 494         return 0;
 495 }
 496
 497 _public_ int sd_bus_creds_get_session(sd_bus_creds *c, const char **ret) {
 498         int r;
 499
 500         assert_return(c, -EINVAL);
 501         assert_return(ret, -EINVAL);
 502
 503         if (!(c->mask & SD_BUS_CREDS_SESSION))
 504                 return -ENODATA;
 505
 506         assert(c->cgroup);
 507
 508         if (!c->session) {
 509                 const char *shifted;
 510
 511                 r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted);
 512                 if (r < 0)
 513                         return r;
 514
 515                 r = cg_path_get_session(shifted, (char**) &c->session);
 516                 if (r < 0)
 517                         return r;
 518         }
 519
 520         *ret = c->session;
 521         return 0;
 522 }
 523
 524 _public_ int sd_bus_creds_get_owner_uid(sd_bus_creds *c, uid_t *uid) {
 525         const char *shifted;
 526         int r;
 527
 528         assert_return(c, -EINVAL);
 529         assert_return(uid, -EINVAL);
 530
 531         if (!(c->mask & SD_BUS_CREDS_OWNER_UID))
 532                 return -ENODATA;
 533
 534         assert(c->cgroup);
 535
 536         r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted);
 537         if (r < 0)
 538                 return r;
 539
 540         return cg_path_get_owner_uid(shifted, uid);
 541 }
 542
 543 _public_ int sd_bus_creds_get_cmdline(sd_bus_creds *c, char ***cmdline) {
 544         assert_return(c, -EINVAL);
 545
 546         if (!(c->mask & SD_BUS_CREDS_CMDLINE))
 547                 return -ENODATA;
 548
 549         if (!c->cmdline)
 550                 return -ENXIO;
 551
 552         if (!c->cmdline_array) {
 553                 c->cmdline_array = strv_parse_nulstr(c->cmdline, c->cmdline_size);
 554                 if (!c->cmdline_array)
 555                         return -ENOMEM;
 556         }
 557
 558         *cmdline = c->cmdline_array;
 559         return 0;
 560 }
 561
 562 _public_ int sd_bus_creds_get_audit_session_id(sd_bus_creds *c, uint32_t *sessionid) {
 563         assert_return(c, -EINVAL);
 564         assert_return(sessionid, -EINVAL);
 565
 566         if (!(c->mask & SD_BUS_CREDS_AUDIT_SESSION_ID))
 567                 return -ENODATA;
 568
 569         if (c->audit_session_id == AUDIT_SESSION_INVALID)
 570                 return -ENXIO;
 571
 572         *sessionid = c->audit_session_id;
 573         return 0;
 574 }
 575
 576 _public_ int sd_bus_creds_get_audit_login_uid(sd_bus_creds *c, uid_t *uid) {
 577         assert_return(c, -EINVAL);
 578         assert_return(uid, -EINVAL);
 579
 580         if (!(c->mask & SD_BUS_CREDS_AUDIT_LOGIN_UID))
 581                 return -ENODATA;
 582
 583         if (c->audit_login_uid == UID_INVALID)
 584                 return -ENXIO;
 585
 586         *uid = c->audit_login_uid;
 587         return 0;
 588 }
 589
 590 _public_ int sd_bus_creds_get_tty(sd_bus_creds *c, const char **ret) {
 591         assert_return(c, -EINVAL);
 592         assert_return(ret, -EINVAL);
 593
 594         if (!(c->mask & SD_BUS_CREDS_TTY))
 595                 return -ENODATA;
 596
 597         if (!c->tty)
 598                 return -ENXIO;
 599
 600         *ret = c->tty;
 601         return 0;
 602 }
 603
 604 _public_ int sd_bus_creds_get_unique_name(sd_bus_creds *c, const char **unique_name) {
 605         assert_return(c, -EINVAL);
 606         assert_return(unique_name, -EINVAL);
 607
 608         if (!(c->mask & SD_BUS_CREDS_UNIQUE_NAME))
 609                 return -ENODATA;
 610
 611         *unique_name = c->unique_name;
 612         return 0;
 613 }
 614
 615 _public_ int sd_bus_creds_get_well_known_names(sd_bus_creds *c, char ***well_known_names) {
 616         assert_return(c, -EINVAL);
 617         assert_return(well_known_names, -EINVAL);
 618
 619         if (!(c->mask & SD_BUS_CREDS_WELL_KNOWN_NAMES))
 620                 return -ENODATA;
 621
 622         /* As a special hack we return the bus driver as well-known
 623          * names list when this is requested. */
 624         if (c->well_known_names_driver) {
 625                 static const char* const wkn[] = {
 626                         "org.freedesktop.DBus",
 627                         NULL
 628                 };
 629
 630                 *well_known_names = (char**) wkn;
 631                 return 0;
 632         }
 633
 634         if (c->well_known_names_local) {
 635                 static const char* const wkn[] = {
 636                         "org.freedesktop.DBus.Local",
 637                         NULL
 638                 };
 639
 640                 *well_known_names = (char**) wkn;
 641                 return 0;
 642         }
 643
 644         *well_known_names = c->well_known_names;
 645         return 0;
 646 }
 647
 648 _public_ int sd_bus_creds_get_description(sd_bus_creds *c, const char **ret) {
 649         assert_return(c, -EINVAL);
 650         assert_return(ret, -EINVAL);
 651
 652         if (!(c->mask & SD_BUS_CREDS_DESCRIPTION))
 653                 return -ENODATA;
 654
 655         assert(c->description);
 656
 657         if (!c->unescaped_description) {
 658                 c->unescaped_description = bus_label_unescape(c->description);
 659                 if (!c->unescaped_description)
 660                         return -ENOMEM;
 661         }
 662
 663         *ret = c->unescaped_description;
 664         return 0;
 665 }
 666
 667 static int has_cap(sd_bus_creds *c, unsigned offset, int capability) {
 668         size_t sz;
 669
 670         assert(c);
 671         assert(capability >= 0);
 672         assert(c->capability);
 673
 674         if ((unsigned) capability > cap_last_cap())
 675                 return 0;
 676
 677         sz = DIV_ROUND_UP(cap_last_cap(), 32U);
 678
 679         return !!(c->capability[offset * sz + CAP_TO_INDEX(capability)] & CAP_TO_MASK(capability));
 680 }
 681
 682 _public_ int sd_bus_creds_has_effective_cap(sd_bus_creds *c, int capability) {
 683         assert_return(c, -EINVAL);
 684         assert_return(capability >= 0, -EINVAL);
 685
 686         if (!(c->mask & SD_BUS_CREDS_EFFECTIVE_CAPS))
 687                 return -ENODATA;
 688
 689         return has_cap(c, CAP_OFFSET_EFFECTIVE, capability);
 690 }
 691
 692 _public_ int sd_bus_creds_has_permitted_cap(sd_bus_creds *c, int capability) {
 693         assert_return(c, -EINVAL);
 694         assert_return(capability >= 0, -EINVAL);
 695
 696         if (!(c->mask & SD_BUS_CREDS_PERMITTED_CAPS))
 697                 return -ENODATA;
 698
 699         return has_cap(c, CAP_OFFSET_PERMITTED, capability);
 700 }
 701
 702 _public_ int sd_bus_creds_has_inheritable_cap(sd_bus_creds *c, int capability) {
 703         assert_return(c, -EINVAL);
 704         assert_return(capability >= 0, -EINVAL);
 705
 706         if (!(c->mask & SD_BUS_CREDS_INHERITABLE_CAPS))
 707                 return -ENODATA;
 708
 709         return has_cap(c, CAP_OFFSET_INHERITABLE, capability);
 710 }
 711
 712 _public_ int sd_bus_creds_has_bounding_cap(sd_bus_creds *c, int capability) {
 713         assert_return(c, -EINVAL);
 714         assert_return(capability >= 0, -EINVAL);
 715
 716         if (!(c->mask & SD_BUS_CREDS_BOUNDING_CAPS))
 717                 return -ENODATA;
 718
 719         return has_cap(c, CAP_OFFSET_BOUNDING, capability);
 720 }
 721
 722 static int parse_caps(sd_bus_creds *c, unsigned offset, const char *p) {
 723         size_t sz, max;
 724         unsigned i, j;
 725
 726         assert(c);
 727         assert(p);
 728
 729         max = DIV_ROUND_UP(cap_last_cap(), 32U);
 730         p += strspn(p, WHITESPACE);
 731
 732         sz = strlen(p);
 733         if (sz % 8 != 0)
 734                 return -EINVAL;
 735
 736         sz /= 8;
 737         if (sz > max)
 738                 return -EINVAL;
 739
 740         if (!c->capability) {
 741                 c->capability = new0(uint32_t, max * 4);
 742                 if (!c->capability)
 743                         return -ENOMEM;
 744         }
 745
 746         for (i = 0; i < sz; i ++) {
 747                 uint32_t v = 0;
 748
 749                 for (j = 0; j < 8; ++j) {
 750                         int t;
 751
 752                         t = unhexchar(*p++);
 753                         if (t < 0)
 754                                 return -EINVAL;
 755
 756                         v = (v << 4) | t;
 757                 }
 758
 759                 c->capability[offset * max + (sz - i - 1)] = v;
 760         }
 761
 762         return 0;
 763 }
 764
 765 int bus_creds_add_more(sd_bus_creds *c, uint64_t mask, pid_t pid, pid_t tid) {
 766         uint64_t missing;
 767         int r;
 768
 769         assert(c);
 770         assert(c->allocated);
 771
 772         if (!(mask & SD_BUS_CREDS_AUGMENT))
 773                 return 0;
 774
 775         /* Try to retrieve PID from creds if it wasn't passed to us */
 776         if (pid > 0) {
 777                 c->pid = pid;
 778                 c->mask |= SD_BUS_CREDS_PID;
 779         } else if (c->mask & SD_BUS_CREDS_PID)
 780                 pid = c->pid;
 781         else
 782                 /* Without pid we cannot do much... */
 783                 return 0;
 784
 785         /* Try to retrieve TID from creds if it wasn't passed to us */
 786         if (tid <= 0 && (c->mask & SD_BUS_CREDS_TID))
 787                 tid = c->tid;
 788
 789         /* Calculate what we shall and can add */
 790         missing = mask & ~(c->mask|SD_BUS_CREDS_PID|SD_BUS_CREDS_TID|SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_DESCRIPTION|SD_BUS_CREDS_AUGMENT);
 791         if (missing == 0)
 792                 return 0;
 793
 794         if (tid > 0) {
 795                 c->tid = tid;
 796                 c->mask |= SD_BUS_CREDS_TID;
 797         }
 798
 799         if (missing & (SD_BUS_CREDS_PPID |
 800                        SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_SUID | SD_BUS_CREDS_FSUID |
 801                        SD_BUS_CREDS_GID | SD_BUS_CREDS_EGID | SD_BUS_CREDS_SGID | SD_BUS_CREDS_FSGID |
 802                        SD_BUS_CREDS_SUPPLEMENTARY_GIDS |
 803                        SD_BUS_CREDS_EFFECTIVE_CAPS | SD_BUS_CREDS_INHERITABLE_CAPS |
 804                        SD_BUS_CREDS_PERMITTED_CAPS | SD_BUS_CREDS_BOUNDING_CAPS)) {
 805
 806                 _cleanup_fclose_ FILE *f = NULL;
 807                 const char *p;
 808
 809                 p = procfs_file_alloca(pid, "status");
 810
 811                 f = fopen(p, "re");
 812                 if (!f) {
 813                         if (errno == ENOENT)
 814                                 return -ESRCH;
 815                         else if (errno != EPERM && errno != EACCES)
 816                                 return -errno;
 817                 } else {
 818                         char line[LINE_MAX];
 819
 820                         FOREACH_LINE(line, f, return -errno) {
 821                                 truncate_nl(line);
 822
 823                                 if (missing & SD_BUS_CREDS_PPID) {
 824                                         p = startswith(line, "PPid:");
 825                                         if (p) {
 826                                                 p += strspn(p, WHITESPACE);
 827
 828                                                 /* Explicitly check for PPID 0 (which is the case for PID 1) */
 829                                                 if (!streq(p, "0")) {
 830                                                         r = parse_pid(p, &c->ppid);
 831                                                         if (r < 0)
 832                                                                 return r;
 833
 834                                                 } else
 835                                                         c->ppid = 0;
 836
 837                                                 c->mask |= SD_BUS_CREDS_PPID;
 838                                                 continue;
 839                                         }
 840                                 }
 841
 842                                 if (missing & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID)) {
 843                                         p = startswith(line, "Uid:");
 844                                         if (p) {
 845                                                 unsigned long uid, euid, suid, fsuid;
 846
 847                                                 p += strspn(p, WHITESPACE);
 848                                                 if (sscanf(p, "%lu %lu %lu %lu", &uid, &euid, &suid, &fsuid) != 4)
 849                                                         return -EIO;
 850
 851                                                 if (missing & SD_BUS_CREDS_UID)
 852                                                         c->uid = (uid_t) uid;
 853                                                 if (missing & SD_BUS_CREDS_EUID)
 854                                                         c->euid = (uid_t) euid;
 855                                                 if (missing & SD_BUS_CREDS_SUID)
 856                                                         c->suid = (uid_t) suid;
 857                                                 if (missing & SD_BUS_CREDS_FSUID)
 858                                                         c->fsuid = (uid_t) fsuid;
 859
 860                                                 c->mask |= missing & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID);
 861                                                 continue;
 862                                         }
 863                                 }
 864
 865                                 if (missing & (SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID)) {
 866                                         p = startswith(line, "Gid:");
 867                                         if (p) {
 868                                                 unsigned long gid, egid, sgid, fsgid;
 869
 870                                                 p += strspn(p, WHITESPACE);
 871                                                 if (sscanf(p, "%lu %lu %lu %lu", &gid, &egid, &sgid, &fsgid) != 4)
 872                                                         return -EIO;
 873
 874                                                 if (missing & SD_BUS_CREDS_GID)
 875                                                         c->gid = (gid_t) gid;
 876                                                 if (missing & SD_BUS_CREDS_EGID)
 877                                                         c->egid = (gid_t) egid;
 878                                                 if (missing & SD_BUS_CREDS_SGID)
 879                                                         c->sgid = (gid_t) sgid;
 880                                                 if (missing & SD_BUS_CREDS_FSGID)
 881                                                         c->fsgid = (gid_t) fsgid;
 882
 883                                                 c->mask |= missing & (SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID);
 884                                                 continue;
 885                                         }
 886                                 }
 887
 888                                 if (missing & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) {
 889                                         p = startswith(line, "Groups:");
 890                                         if (p) {
 891                                                 size_t allocated = 0;
 892
 893                                                 for (;;) {
 894                                                         unsigned long g;
 895                                                         int n = 0;
 896
 897                                                         p += strspn(p, WHITESPACE);
 898                                                         if (*p == 0)
 899                                                                 break;
 900
 901                                                         if (sscanf(p, "%lu%n", &g, &n) != 1)
 902                                                                 return -EIO;
 903
 904                                                         if (!GREEDY_REALLOC(c->supplementary_gids, allocated, c->n_supplementary_gids+1))
 905                                                                 return -ENOMEM;
 906
 907                                                         c->supplementary_gids[c->n_supplementary_gids++] = (gid_t) g;
 908                                                         p += n;
 909                                                 }
 910
 911                                                 c->mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS;
 912                                                 continue;
 913                                         }
 914                                 }
 915
 916                                 if (missing & SD_BUS_CREDS_EFFECTIVE_CAPS) {
 917                                         p = startswith(line, "CapEff:");
 918                                         if (p) {
 919                                                 r = parse_caps(c, CAP_OFFSET_EFFECTIVE, p);
 920                                                 if (r < 0)
 921                                                         return r;
 922
 923                                                 c->mask |= SD_BUS_CREDS_EFFECTIVE_CAPS;
 924                                                 continue;
 925                                         }
 926                                 }
 927
 928                                 if (missing & SD_BUS_CREDS_PERMITTED_CAPS) {
 929                                         p = startswith(line, "CapPrm:");
 930                                         if (p) {
 931                                                 r = parse_caps(c, CAP_OFFSET_PERMITTED, p);
 932                                                 if (r < 0)
 933                                                         return r;
 934
 935                                                 c->mask |= SD_BUS_CREDS_PERMITTED_CAPS;
 936                                                 continue;
 937                                         }
 938                                 }
 939
 940                                 if (missing & SD_BUS_CREDS_INHERITABLE_CAPS) {
 941                                         p = startswith(line, "CapInh:");
 942                                         if (p) {
 943                                                 r = parse_caps(c, CAP_OFFSET_INHERITABLE, p);
 944                                                 if (r < 0)
 945                                                         return r;
 946
 947                                                 c->mask |= SD_BUS_CREDS_INHERITABLE_CAPS;
 948                                                 continue;
 949                                         }
 950                                 }
 951
 952                                 if (missing & SD_BUS_CREDS_BOUNDING_CAPS) {
 953                                         p = startswith(line, "CapBnd:");
 954                                         if (p) {
 955                                                 r = parse_caps(c, CAP_OFFSET_BOUNDING, p);
 956                                                 if (r < 0)
 957                                                         return r;
 958
 959                                                 c->mask |= SD_BUS_CREDS_BOUNDING_CAPS;
 960                                                 continue;
 961                                         }
 962                                 }
 963                         }
 964                 }
 965         }
 966
 967         if (missing & SD_BUS_CREDS_SELINUX_CONTEXT) {
 968                 const char *p;
 969
 970                 p = procfs_file_alloca(pid, "attr/current");
 971                 r = read_one_line_file(p, &c->label);
 972                 if (r < 0) {
 973                         if (r != -ENOENT && r != -EINVAL && r != -EPERM && r != -EACCES)
 974                                 return r;
 975                 } else
 976                         c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
 977         }
 978
 979         if (missing & SD_BUS_CREDS_COMM) {
 980                 r = get_process_comm(pid, &c->comm);
 981                 if (r < 0) {
 982                         if (r != -EPERM && r != -EACCES)
 983                                 return r;
 984                 } else
 985                         c->mask |= SD_BUS_CREDS_COMM;
 986         }
 987
 988         if (missing & SD_BUS_CREDS_EXE) {
 989                 r = get_process_exe(pid, &c->exe);
 990                 if (r == -ESRCH) {
 991                         /* Unfortunately we cannot really distinguish
 992                          * the case here where the process does not
 993                          * exist, and /proc/$PID/exe being unreadable
 994                          * because $PID is a kernel thread. Hence,
 995                          * assume it is a kernel thread, and rely on
 996                          * that this case is caught with a later
 997                          * call. */
 998                         c->exe = NULL;
 999                         c->mask |= SD_BUS_CREDS_EXE;
1000                 } else if (r < 0) {
1001                         if (r != -EPERM && r != -EACCES)
1002                                 return r;
1003                 } else
1004                         c->mask |= SD_BUS_CREDS_EXE;
1005         }
1006
1007         if (missing & SD_BUS_CREDS_CMDLINE) {
1008                 const char *p;
1009
1010                 p = procfs_file_alloca(pid, "cmdline");
1011                 r = read_full_file(p, &c->cmdline, &c->cmdline_size);
1012                 if (r == -ENOENT)
1013                         return -ESRCH;
1014                 if (r < 0) {
1015                         if (r != -EPERM && r != -EACCES)
1016                                 return r;
1017                 } else {
1018                         if (c->cmdline_size == 0) {
1019                                 free(c->cmdline);
1020                                 c->cmdline = NULL;
1021                         }
1022
1023                         c->mask |= SD_BUS_CREDS_CMDLINE;
1024                 }
1025         }
1026
1027         if (tid > 0 && (missing & SD_BUS_CREDS_TID_COMM)) {
1028                 _cleanup_free_ char *p = NULL;
1029
1030                 if (asprintf(&p, "/proc/"PID_FMT"/task/"PID_FMT"/comm", pid, tid) < 0)
1031                         return -ENOMEM;
1032
1033                 r = read_one_line_file(p, &c->tid_comm);
1034                 if (r == -ENOENT)
1035                         return -ESRCH;
1036                 if (r < 0) {
1037                         if (r != -EPERM && r != -EACCES)
1038                                 return r;
1039                 } else
1040                         c->mask |= SD_BUS_CREDS_TID_COMM;
1041         }
1042
1043         if (missing & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_USER_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID)) {
1044
1045                 if (!c->cgroup) {
1046                         r = cg_pid_get_path(NULL, pid, &c->cgroup);
1047                         if (r < 0) {
1048                                 if (r != -EPERM && r != -EACCES)
1049                                         return r;
1050                         }
1051                 }
1052
1053                 if (!c->cgroup_root) {
1054                         r = cg_get_root_path(&c->cgroup_root);
1055                         if (r < 0)
1056                                 return r;
1057                 }
1058
1059                 if (c->cgroup)
1060                         c->mask |= missing & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_USER_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID);
1061         }
1062
1063         if (missing & SD_BUS_CREDS_AUDIT_SESSION_ID) {
1064                 r = audit_session_from_pid(pid, &c->audit_session_id);
1065                 if (r == -ENXIO) {
1066                         /* ENXIO means: no audit session id assigned */
1067                         c->audit_session_id = AUDIT_SESSION_INVALID;
1068                         c->mask |= SD_BUS_CREDS_AUDIT_SESSION_ID;
1069                 } else if (r < 0) {
1070                         if (r != -EOPNOTSUPP && r != -ENOENT && r != -EPERM && r != -EACCES)
1071                                 return r;
1072                 } else
1073                         c->mask |= SD_BUS_CREDS_AUDIT_SESSION_ID;
1074         }
1075
1076         if (missing & SD_BUS_CREDS_AUDIT_LOGIN_UID) {
1077                 r = audit_loginuid_from_pid(pid, &c->audit_login_uid);
1078                 if (r == -ENXIO) {
1079                         /* ENXIO means: no audit login uid assigned */
1080                         c->audit_login_uid = UID_INVALID;
1081                         c->mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID;
1082                 } else if (r < 0) {
1083                         if (r != -EOPNOTSUPP && r != -ENOENT && r != -EPERM && r != -EACCES)
1084                                 return r;
1085                 } else
1086                         c->mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID;
1087         }
1088
1089         if (missing & SD_BUS_CREDS_TTY) {
1090                 r = get_ctty(pid, NULL, &c->tty);
1091                 if (r == -ENXIO) {
1092                         /* ENXIO means: process has no controlling TTY */
1093                         c->tty = NULL;
1094                         c->mask |= SD_BUS_CREDS_TTY;
1095                 } else if (r < 0) {
1096                         if (r != -EPERM && r != -EACCES && r != -ENOENT)
1097                                 return r;
1098                 } else
1099                         c->mask |= SD_BUS_CREDS_TTY;
1100         }
1101
1102         /* In case only the exe path was to be read we cannot
1103          * distinguish the case where the exe path was unreadable
1104          * because the process was a kernel thread, or when the
1105          * process didn't exist at all. Hence, let's do a final check,
1106          * to be sure. */
1107         if (!pid_is_alive(pid))
1108                 return -ESRCH;
1109
1110         if (tid > 0 && tid != pid && !pid_is_unwaited(tid))
1111                 return -ESRCH;
1112
1113         c->augmented = missing & c->mask;
1114
1115         return 0;
1116 }
1117
1118 int bus_creds_extend_by_pid(sd_bus_creds *c, uint64_t mask, sd_bus_creds **ret) {
1119         _cleanup_bus_creds_unref_ sd_bus_creds *n = NULL;
1120         int r;
1121
1122         assert(c);
1123         assert(ret);
1124
1125         if ((mask & ~c->mask) == 0 || (!(mask & SD_BUS_CREDS_AUGMENT))) {
1126                 /* There's already all data we need, or augmentation
1127                  * wasn't turned on. */
1128
1129                 *ret = sd_bus_creds_ref(c);
1130                 return 0;
1131         }
1132
1133         n = bus_creds_new();
1134         if (!n)
1135                 return -ENOMEM;
1136
1137         /* Copy the original data over */
1138
1139         if (c->mask & mask & SD_BUS_CREDS_PID) {
1140                 n->pid = c->pid;
1141                 n->mask |= SD_BUS_CREDS_PID;
1142         }
1143
1144         if (c->mask & mask & SD_BUS_CREDS_TID) {
1145                 n->tid = c->tid;
1146                 n->mask |= SD_BUS_CREDS_TID;
1147         }
1148
1149         if (c->mask & mask & SD_BUS_CREDS_PPID) {
1150                 n->ppid = c->ppid;
1151                 n->mask |= SD_BUS_CREDS_PPID;
1152         }
1153
1154         if (c->mask & mask & SD_BUS_CREDS_UID) {
1155                 n->uid = c->uid;
1156                 n->mask |= SD_BUS_CREDS_UID;
1157         }
1158
1159         if (c->mask & mask & SD_BUS_CREDS_EUID) {
1160                 n->euid = c->euid;
1161                 n->mask |= SD_BUS_CREDS_EUID;
1162         }
1163
1164         if (c->mask & mask & SD_BUS_CREDS_SUID) {
1165                 n->suid = c->suid;
1166                 n->mask |= SD_BUS_CREDS_SUID;
1167         }
1168
1169         if (c->mask & mask & SD_BUS_CREDS_FSUID) {
1170                 n->fsuid = c->fsuid;
1171                 n->mask |= SD_BUS_CREDS_FSUID;
1172         }
1173
1174         if (c->mask & mask & SD_BUS_CREDS_GID) {
1175                 n->gid = c->gid;
1176                 n->mask |= SD_BUS_CREDS_GID;
1177         }
1178
1179         if (c->mask & mask & SD_BUS_CREDS_EGID) {
1180                 n->egid = c->egid;
1181                 n->mask |= SD_BUS_CREDS_EGID;
1182         }
1183
1184         if (c->mask & mask & SD_BUS_CREDS_SGID) {
1185                 n->sgid = c->sgid;
1186                 n->mask |= SD_BUS_CREDS_SGID;
1187         }
1188
1189         if (c->mask & mask & SD_BUS_CREDS_FSGID) {
1190                 n->fsgid = c->fsgid;
1191                 n->mask |= SD_BUS_CREDS_FSGID;
1192         }
1193
1194         if (c->mask & mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) {
1195                 if (c->supplementary_gids) {
1196                         n->supplementary_gids = newdup(gid_t, c->supplementary_gids, c->n_supplementary_gids);
1197                         if (!n->supplementary_gids)
1198                                 return -ENOMEM;
1199                         n->n_supplementary_gids = c->n_supplementary_gids;
1200                 } else {
1201                         n->supplementary_gids = NULL;
1202                         n->n_supplementary_gids = 0;
1203                 }
1204
1205                 n->mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS;
1206         }
1207
1208         if (c->mask & mask & SD_BUS_CREDS_COMM) {
1209                 assert(c->comm);
1210
1211                 n->comm = strdup(c->comm);
1212                 if (!n->comm)
1213                         return -ENOMEM;
1214
1215                 n->mask |= SD_BUS_CREDS_COMM;
1216         }
1217
1218         if (c->mask & mask & SD_BUS_CREDS_TID_COMM) {
1219                 assert(c->tid_comm);
1220
1221                 n->tid_comm = strdup(c->tid_comm);
1222                 if (!n->tid_comm)
1223                         return -ENOMEM;
1224
1225                 n->mask |= SD_BUS_CREDS_TID_COMM;
1226         }
1227
1228         if (c->mask & mask & SD_BUS_CREDS_EXE) {
1229                 if (c->exe) {
1230                         n->exe = strdup(c->exe);
1231                         if (!n->exe)
1232                                 return -ENOMEM;
1233                 } else
1234                         n->exe = NULL;
1235
1236                 n->mask |= SD_BUS_CREDS_EXE;
1237         }
1238
1239         if (c->mask & mask & SD_BUS_CREDS_CMDLINE) {
1240                 if (c->cmdline) {
1241                         n->cmdline = memdup(c->cmdline, c->cmdline_size);
1242                         if (!n->cmdline)
1243                                 return -ENOMEM;
1244
1245                         n->cmdline_size = c->cmdline_size;
1246                 } else {
1247                         n->cmdline = NULL;
1248                         n->cmdline_size = 0;
1249                 }
1250
1251                 n->mask |= SD_BUS_CREDS_CMDLINE;
1252         }
1253
1254         if (c->mask & mask & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_USER_SLICE|SD_BUS_CREDS_OWNER_UID)) {
1255                 assert(c->cgroup);
1256
1257                 n->cgroup = strdup(c->cgroup);
1258                 if (!n->cgroup)
1259                         return -ENOMEM;
1260
1261                 n->cgroup_root = strdup(c->cgroup_root);
1262                 if (!n->cgroup_root)
1263                         return -ENOMEM;
1264
1265                 n->mask |= mask & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_USER_SLICE|SD_BUS_CREDS_OWNER_UID);
1266         }
1267
1268         if (c->mask & mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS)) {
1269                 assert(c->capability);
1270
1271                 n->capability = memdup(c->capability, DIV_ROUND_UP(cap_last_cap(), 32U) * 4 * 4);
1272                 if (!n->capability)
1273                         return -ENOMEM;
1274
1275                 n->mask |= c->mask & mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS);
1276         }
1277
1278         if (c->mask & mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
1279                 assert(c->label);
1280
1281                 n->label = strdup(c->label);
1282                 if (!n->label)
1283                         return -ENOMEM;
1284                 n->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
1285         }
1286
1287         if (c->mask & mask & SD_BUS_CREDS_AUDIT_SESSION_ID) {
1288                 n->audit_session_id = c->audit_session_id;
1289                 n->mask |= SD_BUS_CREDS_AUDIT_SESSION_ID;
1290         }
1291         if (c->mask & mask & SD_BUS_CREDS_AUDIT_LOGIN_UID) {
1292                 n->audit_login_uid = c->audit_login_uid;
1293                 n->mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID;
1294         }
1295
1296         if (c->mask & mask & SD_BUS_CREDS_TTY) {
1297                 if (c->tty) {
1298                         n->tty = strdup(c->tty);
1299                         if (!n->tty)
1300                                 return -ENOMEM;
1301                 } else
1302                         n->tty = NULL;
1303                 n->mask |= SD_BUS_CREDS_TTY;
1304         }
1305
1306         if (c->mask & mask & SD_BUS_CREDS_UNIQUE_NAME) {
1307                 assert(c->unique_name);
1308
1309                 n->unique_name = strdup(c->unique_name);
1310                 if (!n->unique_name)
1311                         return -ENOMEM;
1312                 n->mask |= SD_BUS_CREDS_UNIQUE_NAME;
1313         }
1314
1315         if (c->mask & mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) {
1316                 if (strv_isempty(c->well_known_names))
1317                         n->well_known_names = NULL;
1318                 else {
1319                         n->well_known_names = strv_copy(c->well_known_names);
1320                         if (!n->well_known_names)
1321                                 return -ENOMEM;
1322                 }
1323                 n->well_known_names_driver = c->well_known_names_driver;
1324                 n->well_known_names_local = c->well_known_names_local;
1325                 n->mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;
1326         }
1327
1328         if (c->mask & mask & SD_BUS_CREDS_DESCRIPTION) {
1329                 assert(c->description);
1330                 n->description = strdup(c->description);
1331                 if (!n->description)
1332                         return -ENOMEM;
1333                 n->mask |= SD_BUS_CREDS_DESCRIPTION;
1334         }
1335
1336         n->augmented = c->augmented & n->mask;
1337
1338         /* Get more data */
1339
1340         r = bus_creds_add_more(n, mask, 0, 0);
1341         if (r < 0)
1342                 return r;
1343
1344         *ret = n;
1345         n = NULL;
1346         return 0;
1347 }