src/basic/path-lookup.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6
   7 #include "alloc-util.h"
   8 #include "fs-util.h"
   9 #include "log.h"
  10 #include "macro.h"
  11 #include "nulstr-util.h"
  12 #include "path-lookup.h"
  13 #include "path-util.h"
  14 #include "stat-util.h"
  15 #include "string-util.h"
  16 #include "strv.h"
  17 #include "tmpfile-util.h"
  18 #include "user-util.h"
  19
  20 int xdg_user_runtime_dir(char **ret, const char *suffix) {
  21         const char *e;
  22         char *j;
  23
  24         assert(ret);
  25         assert(suffix);
  26
  27         e = getenv("XDG_RUNTIME_DIR");
  28         if (!e)
  29                 return -ENXIO;
  30
  31         j = path_join(e, suffix);
  32         if (!j)
  33                 return -ENOMEM;
  34
  35         *ret = j;
  36         return 0;
  37 }
  38
  39 int xdg_user_config_dir(char **ret, const char *suffix) {
  40         _cleanup_free_ char *j = NULL;
  41         const char *e;
  42         int r;
  43
  44         assert(ret);
  45
  46         e = getenv("XDG_CONFIG_HOME");
  47         if (e) {
  48                 j = path_join(e, suffix);
  49                 if (!j)
  50                         return -ENOMEM;
  51         } else {
  52                 r = get_home_dir(&j);
  53                 if (r < 0)
  54                         return r;
  55
  56                 if (!path_extend(&j, "/.config", suffix))
  57                         return -ENOMEM;
  58         }
  59
  60         *ret = TAKE_PTR(j);
  61         return 0;
  62 }
  63
  64 int xdg_user_data_dir(char **ret, const char *suffix) {
  65         _cleanup_free_ char *j = NULL;
  66         const char *e;
  67         int r;
  68
  69         assert(ret);
  70         assert(suffix);
  71
  72         /* We don't treat /etc/xdg/systemd here as the spec
  73          * suggests because we assume that is a link to
  74          * /etc/systemd/ anyway. */
  75
  76         e = getenv("XDG_DATA_HOME");
  77         if (e) {
  78                 j = path_join(e, suffix);
  79                 if (!j)
  80                         return -ENOMEM;
  81         } else {
  82                 r = get_home_dir(&j);
  83                 if (r < 0)
  84                         return r;
  85
  86                 if (!path_extend(&j, "/.local/share", suffix))
  87                         return -ENOMEM;
  88         }
  89
  90         *ret = TAKE_PTR(j);
  91         return 1;
  92 }
  93
  94 static const char* const user_data_unit_paths[] = {
  95         "/usr/local/lib/systemd/user",
  96         "/usr/local/share/systemd/user",
  97         USER_DATA_UNIT_DIR,
  98         "/usr/lib/systemd/user",
  99         "/usr/share/systemd/user",
 100         NULL
 101 };
 102
 103 static const char* const user_config_unit_paths[] = {
 104         USER_CONFIG_UNIT_DIR,
 105         "/etc/systemd/user",
 106         NULL
 107 };
 108
 109 int xdg_user_dirs(char ***ret_config_dirs, char ***ret_data_dirs) {
 110         /* Implement the mechanisms defined in
 111          *
 112          * https://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
 113          *
 114          * We look in both the config and the data dirs because we
 115          * want to encourage that distributors ship their unit files
 116          * as data, and allow overriding as configuration.
 117          */
 118         const char *e;
 119         _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
 120
 121         e = getenv("XDG_CONFIG_DIRS");
 122         if (e)
 123                 config_dirs = strv_split(e, ":");
 124         else
 125                 config_dirs = strv_new("/etc/xdg");
 126         if (!config_dirs)
 127                 return -ENOMEM;
 128
 129         e = getenv("XDG_DATA_DIRS");
 130         if (e)
 131                 data_dirs = strv_split(e, ":");
 132         else
 133                 data_dirs = strv_new("/usr/local/share",
 134                                      "/usr/share");
 135         if (!data_dirs)
 136                 return -ENOMEM;
 137
 138         *ret_config_dirs = TAKE_PTR(config_dirs);
 139         *ret_data_dirs = TAKE_PTR(data_dirs);
 140
 141         return 0;
 142 }
 143
 144 static char** user_dirs(
 145                 const char *persistent_config,
 146                 const char *runtime_config,
 147                 const char *global_persistent_config,
 148                 const char *global_runtime_config,
 149                 const char *generator,
 150                 const char *generator_early,
 151                 const char *generator_late,
 152                 const char *transient,
 153                 const char *persistent_control,
 154                 const char *runtime_control) {
 155
 156         _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
 157         _cleanup_free_ char *data_home = NULL;
 158         _cleanup_strv_free_ char **res = NULL;
 159         int r;
 160
 161         r = xdg_user_dirs(&config_dirs, &data_dirs);
 162         if (r < 0)
 163                 return NULL;
 164
 165         r = xdg_user_data_dir(&data_home, "/systemd/user");
 166         if (r < 0 && r != -ENXIO)
 167                 return NULL;
 168
 169         /* Now merge everything we found. */
 170         if (strv_extend(&res, persistent_control) < 0)
 171                 return NULL;
 172
 173         if (strv_extend(&res, runtime_control) < 0)
 174                 return NULL;
 175
 176         if (strv_extend(&res, transient) < 0)
 177                 return NULL;
 178
 179         if (strv_extend(&res, generator_early) < 0)
 180                 return NULL;
 181
 182         if (strv_extend(&res, persistent_config) < 0)
 183                 return NULL;
 184
 185         if (strv_extend_strv_concat(&res, config_dirs, "/systemd/user") < 0)
 186                 return NULL;
 187
 188         /* global config has lower priority than the user config of the same type */
 189         if (strv_extend(&res, global_persistent_config) < 0)
 190                 return NULL;
 191
 192         if (strv_extend_strv(&res, (char**) user_config_unit_paths, false) < 0)
 193                 return NULL;
 194
 195         if (strv_extend(&res, runtime_config) < 0)
 196                 return NULL;
 197
 198         if (strv_extend(&res, global_runtime_config) < 0)
 199                 return NULL;
 200
 201         if (strv_extend(&res, generator) < 0)
 202                 return NULL;
 203
 204         if (strv_extend(&res, data_home) < 0)
 205                 return NULL;
 206
 207         if (strv_extend_strv_concat(&res, data_dirs, "/systemd/user") < 0)
 208                 return NULL;
 209
 210         if (strv_extend_strv(&res, (char**) user_data_unit_paths, false) < 0)
 211                 return NULL;
 212
 213         if (strv_extend(&res, generator_late) < 0)
 214                 return NULL;
 215
 216         if (path_strv_make_absolute_cwd(res) < 0)
 217                 return NULL;
 218
 219         return TAKE_PTR(res);
 220 }
 221
 222 bool path_is_user_data_dir(const char *path) {
 223         assert(path);
 224
 225         return strv_contains((char**) user_data_unit_paths, path);
 226 }
 227
 228 bool path_is_user_config_dir(const char *path) {
 229         assert(path);
 230
 231         return strv_contains((char**) user_config_unit_paths, path);
 232 }
 233
 234 static int acquire_generator_dirs(
 235                 RuntimeScope scope,
 236                 const char *tempdir,
 237                 char **generator,
 238                 char **generator_early,
 239                 char **generator_late) {
 240
 241         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *p = NULL;
 242         const char *prefix;
 243
 244         assert(generator);
 245         assert(generator_early);
 246         assert(generator_late);
 247         assert(IN_SET(scope, RUNTIME_SCOPE_SYSTEM, RUNTIME_SCOPE_USER, RUNTIME_SCOPE_GLOBAL));
 248
 249         if (scope == RUNTIME_SCOPE_GLOBAL)
 250                 return -EOPNOTSUPP;
 251
 252         if (tempdir)
 253                 prefix = tempdir;
 254         else if (scope == RUNTIME_SCOPE_SYSTEM)
 255                 prefix = "/run/systemd";
 256         else {
 257                 /* RUNTIME_SCOPE_USER */
 258                 const char *e;
 259
 260                 e = getenv("XDG_RUNTIME_DIR");
 261                 if (!e)
 262                         return -ENXIO;
 263
 264                 p = path_join(e, "/systemd");
 265                 if (!p)
 266                         return -ENOMEM;
 267
 268                 prefix = p;
 269         }
 270
 271         x = path_join(prefix, "generator");
 272         if (!x)
 273                 return -ENOMEM;
 274
 275         y = path_join(prefix, "generator.early");
 276         if (!y)
 277                 return -ENOMEM;
 278
 279         z = path_join(prefix, "generator.late");
 280         if (!z)
 281                 return -ENOMEM;
 282
 283         *generator = TAKE_PTR(x);
 284         *generator_early = TAKE_PTR(y);
 285         *generator_late = TAKE_PTR(z);
 286
 287         return 0;
 288 }
 289
 290 static int acquire_transient_dir(
 291                 RuntimeScope scope,
 292                 const char *tempdir,
 293                 char **ret) {
 294
 295         char *transient;
 296
 297         assert(ret);
 298         assert(IN_SET(scope, RUNTIME_SCOPE_SYSTEM, RUNTIME_SCOPE_USER, RUNTIME_SCOPE_GLOBAL));
 299
 300         if (scope == RUNTIME_SCOPE_GLOBAL)
 301                 return -EOPNOTSUPP;
 302
 303         if (tempdir)
 304                 transient = path_join(tempdir, "transient");
 305         else if (scope == RUNTIME_SCOPE_SYSTEM)
 306                 transient = strdup("/run/systemd/transient");
 307         else
 308                 return xdg_user_runtime_dir(ret, "/systemd/transient");
 309
 310         if (!transient)
 311                 return -ENOMEM;
 312         *ret = transient;
 313         return 0;
 314 }
 315
 316 static int acquire_config_dirs(RuntimeScope scope, char **persistent, char **runtime) {
 317         _cleanup_free_ char *a = NULL, *b = NULL;
 318         int r;
 319
 320         assert(persistent);
 321         assert(runtime);
 322
 323         switch (scope) {
 324
 325         case RUNTIME_SCOPE_SYSTEM:
 326                 a = strdup(SYSTEM_CONFIG_UNIT_DIR);
 327                 b = strdup("/run/systemd/system");
 328                 break;
 329
 330         case RUNTIME_SCOPE_GLOBAL:
 331                 a = strdup(USER_CONFIG_UNIT_DIR);
 332                 b = strdup("/run/systemd/user");
 333                 break;
 334
 335         case RUNTIME_SCOPE_USER:
 336                 r = xdg_user_config_dir(&a, "/systemd/user");
 337                 if (r < 0 && r != -ENXIO)
 338                         return r;
 339
 340                 r = xdg_user_runtime_dir(runtime, "/systemd/user");
 341                 if (r < 0) {
 342                         if (r != -ENXIO)
 343                                 return r;
 344
 345                         /* If XDG_RUNTIME_DIR is not set, don't consider that fatal, simply initialize the runtime
 346                          * directory to NULL */
 347                         *runtime = NULL;
 348                 }
 349
 350                 *persistent = TAKE_PTR(a);
 351
 352                 return 0;
 353
 354         default:
 355                 assert_not_reached();
 356         }
 357
 358         if (!a || !b)
 359                 return -ENOMEM;
 360
 361         *persistent = TAKE_PTR(a);
 362         *runtime = TAKE_PTR(b);
 363
 364         return 0;
 365 }
 366
 367 static int acquire_control_dirs(RuntimeScope scope, char **persistent, char **runtime) {
 368         _cleanup_free_ char *a = NULL;
 369         int r;
 370
 371         assert(persistent);
 372         assert(runtime);
 373
 374         switch (scope) {
 375
 376         case RUNTIME_SCOPE_SYSTEM:  {
 377                 _cleanup_free_ char *b = NULL;
 378
 379                 a = strdup("/etc/systemd/system.control");
 380                 if (!a)
 381                         return -ENOMEM;
 382
 383                 b = strdup("/run/systemd/system.control");
 384                 if (!b)
 385                         return -ENOMEM;
 386
 387                 *runtime = TAKE_PTR(b);
 388
 389                 break;
 390         }
 391
 392         case RUNTIME_SCOPE_USER:
 393                 r = xdg_user_config_dir(&a, "/systemd/user.control");
 394                 if (r < 0 && r != -ENXIO)
 395                         return r;
 396
 397                 r = xdg_user_runtime_dir(runtime, "/systemd/user.control");
 398                 if (r < 0) {
 399                         if (r != -ENXIO)
 400                                 return r;
 401
 402                         /* If XDG_RUNTIME_DIR is not set, don't consider this fatal, simply initialize the directory to
 403                          * NULL */
 404                         *runtime = NULL;
 405                 }
 406
 407                 break;
 408
 409         case RUNTIME_SCOPE_GLOBAL:
 410                 return -EOPNOTSUPP;
 411
 412         default:
 413                 assert_not_reached();
 414         }
 415
 416         *persistent = TAKE_PTR(a);
 417
 418         return 0;
 419 }
 420
 421 static int acquire_attached_dirs(
 422                 RuntimeScope scope,
 423                 char **ret_persistent,
 424                 char **ret_runtime) {
 425
 426         _cleanup_free_ char *a = NULL, *b = NULL;
 427
 428         assert(ret_persistent);
 429         assert(ret_runtime);
 430
 431         /* Portable services are not available to regular users for now. */
 432         if (scope != RUNTIME_SCOPE_SYSTEM)
 433                 return -EOPNOTSUPP;
 434
 435         a = strdup("/etc/systemd/system.attached");
 436         if (!a)
 437                 return -ENOMEM;
 438
 439         b = strdup("/run/systemd/system.attached");
 440         if (!b)
 441                 return -ENOMEM;
 442
 443         *ret_persistent = TAKE_PTR(a);
 444         *ret_runtime = TAKE_PTR(b);
 445
 446         return 0;
 447 }
 448
 449 static int patch_root_prefix(char **p, const char *root_dir) {
 450         char *c;
 451
 452         assert(p);
 453
 454         if (!*p)
 455                 return 0;
 456
 457         c = path_join(root_dir, *p);
 458         if (!c)
 459                 return -ENOMEM;
 460
 461         free_and_replace(*p, c);
 462         return 0;
 463 }
 464
 465 static int patch_root_prefix_strv(char **l, const char *root_dir) {
 466         int r;
 467
 468         if (!root_dir)
 469                 return 0;
 470
 471         STRV_FOREACH(i, l) {
 472                 r = patch_root_prefix(i, root_dir);
 473                 if (r < 0)
 474                         return r;
 475         }
 476
 477         return 0;
 478 }
 479
 480 static int get_paths_from_environ(const char *var, char ***paths, bool *append) {
 481         const char *e;
 482         int r;
 483
 484         assert(var);
 485         assert(paths);
 486         assert(append);
 487
 488         *append = false;
 489
 490         e = getenv(var);
 491         if (e) {
 492                 const char *k;
 493
 494                 k = endswith(e, ":");
 495                 if (k) {
 496                         e = strndupa_safe(e, k - e);
 497                         *append = true;
 498                 }
 499
 500                 /* FIXME: empty components in other places should be rejected. */
 501
 502                 r = path_split_and_make_absolute(e, paths);
 503                 if (r < 0)
 504                         return r;
 505         }
 506
 507         return 0;
 508 }
 509
 510 int lookup_paths_init(
 511                 LookupPaths *lp,
 512                 RuntimeScope scope,
 513                 LookupPathsFlags flags,
 514                 const char *root_dir) {
 515
 516         _cleanup_(rmdir_and_freep) char *tempdir = NULL;
 517         _cleanup_free_ char
 518                 *root = NULL,
 519                 *persistent_config = NULL, *runtime_config = NULL,
 520                 *global_persistent_config = NULL, *global_runtime_config = NULL,
 521                 *generator = NULL, *generator_early = NULL, *generator_late = NULL,
 522                 *transient = NULL,
 523                 *persistent_control = NULL, *runtime_control = NULL,
 524                 *persistent_attached = NULL, *runtime_attached = NULL;
 525         bool append = false; /* Add items from SYSTEMD_UNIT_PATH before normal directories */
 526         _cleanup_strv_free_ char **paths = NULL;
 527         int r;
 528
 529         assert(lp);
 530         assert(scope >= 0);
 531         assert(scope < _RUNTIME_SCOPE_MAX);
 532
 533 #if HAVE_SPLIT_USR
 534         flags |= LOOKUP_PATHS_SPLIT_USR;
 535 #endif
 536
 537         if (!empty_or_root(root_dir)) {
 538                 if (scope == RUNTIME_SCOPE_USER)
 539                         return -EINVAL;
 540
 541                 r = is_dir(root_dir, true);
 542                 if (r < 0)
 543                         return r;
 544                 if (r == 0)
 545                         return -ENOTDIR;
 546
 547                 root = strdup(root_dir);
 548                 if (!root)
 549                         return -ENOMEM;
 550         }
 551
 552         if (flags & LOOKUP_PATHS_TEMPORARY_GENERATED) {
 553                 r = mkdtemp_malloc("/tmp/systemd-temporary-XXXXXX", &tempdir);
 554                 if (r < 0)
 555                         return log_debug_errno(r, "Failed to create temporary directory: %m");
 556         }
 557
 558         /* Note: when XDG_RUNTIME_DIR is not set this will not return -ENXIO, but simply set runtime_config to NULL */
 559         r = acquire_config_dirs(scope, &persistent_config, &runtime_config);
 560         if (r < 0)
 561                 return r;
 562
 563         if (scope == RUNTIME_SCOPE_USER) {
 564                 r = acquire_config_dirs(RUNTIME_SCOPE_GLOBAL, &global_persistent_config, &global_runtime_config);
 565                 if (r < 0)
 566                         return r;
 567         }
 568
 569         if ((flags & LOOKUP_PATHS_EXCLUDE_GENERATED) == 0) {
 570                 /* Note: if XDG_RUNTIME_DIR is not set, this will fail completely with ENXIO */
 571                 r = acquire_generator_dirs(scope, tempdir,
 572                                            &generator, &generator_early, &generator_late);
 573                 if (r < 0 && !IN_SET(r, -EOPNOTSUPP, -ENXIO))
 574                         return r;
 575         }
 576
 577         /* Note: if XDG_RUNTIME_DIR is not set, this will fail completely with ENXIO */
 578         r = acquire_transient_dir(scope, tempdir, &transient);
 579         if (r < 0 && !IN_SET(r, -EOPNOTSUPP, -ENXIO))
 580                 return r;
 581
 582         /* Note: when XDG_RUNTIME_DIR is not set this will not return -ENXIO, but simply set runtime_control to NULL */
 583         r = acquire_control_dirs(scope, &persistent_control, &runtime_control);
 584         if (r < 0 && r != -EOPNOTSUPP)
 585                 return r;
 586
 587         r = acquire_attached_dirs(scope, &persistent_attached, &runtime_attached);
 588         if (r < 0 && r != -EOPNOTSUPP)
 589                 return r;
 590
 591         /* First priority is whatever has been passed to us via env vars */
 592         r = get_paths_from_environ("SYSTEMD_UNIT_PATH", &paths, &append);
 593         if (r < 0)
 594                 return r;
 595
 596         if (!paths || append) {
 597                 /* Let's figure something out. */
 598
 599                 _cleanup_strv_free_ char **add = NULL;
 600
 601                 /* For the user units we include share/ in the search
 602                  * path in order to comply with the XDG basedir spec.
 603                  * For the system stuff we avoid such nonsense. OTOH
 604                  * we include /lib in the search path for the system
 605                  * stuff but avoid it for user stuff. */
 606
 607                 switch (scope) {
 608
 609                 case RUNTIME_SCOPE_SYSTEM:
 610                         add = strv_new(
 611                                         /* If you modify this you also want to modify
 612                                          * systemdsystemunitpath= in systemd.pc.in! */
 613                                         STRV_IFNOTNULL(persistent_control),
 614                                         STRV_IFNOTNULL(runtime_control),
 615                                         STRV_IFNOTNULL(transient),
 616                                         STRV_IFNOTNULL(generator_early),
 617                                         persistent_config,
 618                                         SYSTEM_CONFIG_UNIT_DIR,
 619                                         "/etc/systemd/system",
 620                                         STRV_IFNOTNULL(persistent_attached),
 621                                         runtime_config,
 622                                         "/run/systemd/system",
 623                                         STRV_IFNOTNULL(runtime_attached),
 624                                         STRV_IFNOTNULL(generator),
 625                                         "/usr/local/lib/systemd/system",
 626                                         SYSTEM_DATA_UNIT_DIR,
 627                                         "/usr/lib/systemd/system",
 628                                         STRV_IFNOTNULL(flags & LOOKUP_PATHS_SPLIT_USR ? "/lib/systemd/system" : NULL),
 629                                         STRV_IFNOTNULL(generator_late));
 630                         break;
 631
 632                 case RUNTIME_SCOPE_GLOBAL:
 633                         add = strv_new(
 634                                         /* If you modify this you also want to modify
 635                                          * systemduserunitpath= in systemd.pc.in, and
 636                                          * the arrays in user_dirs() above! */
 637                                         STRV_IFNOTNULL(persistent_control),
 638                                         STRV_IFNOTNULL(runtime_control),
 639                                         STRV_IFNOTNULL(transient),
 640                                         STRV_IFNOTNULL(generator_early),
 641                                         persistent_config,
 642                                         USER_CONFIG_UNIT_DIR,
 643                                         "/etc/systemd/user",
 644                                         runtime_config,
 645                                         "/run/systemd/user",
 646                                         STRV_IFNOTNULL(generator),
 647                                         "/usr/local/share/systemd/user",
 648                                         "/usr/share/systemd/user",
 649                                         "/usr/local/lib/systemd/user",
 650                                         USER_DATA_UNIT_DIR,
 651                                         "/usr/lib/systemd/user",
 652                                         STRV_IFNOTNULL(generator_late));
 653                         break;
 654
 655                 case RUNTIME_SCOPE_USER:
 656                         add = user_dirs(persistent_config, runtime_config,
 657                                         global_persistent_config, global_runtime_config,
 658                                         generator, generator_early, generator_late,
 659                                         transient,
 660                                         persistent_control, runtime_control);
 661                         break;
 662
 663                 default:
 664                         assert_not_reached();
 665                 }
 666
 667                 if (!add)
 668                         return -ENOMEM;
 669
 670                 if (paths) {
 671                         r = strv_extend_strv(&paths, add, true);
 672                         if (r < 0)
 673                                 return r;
 674                 } else
 675                         /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
 676                          * and don't have to copy anything */
 677                         paths = TAKE_PTR(add);
 678         }
 679
 680         r = patch_root_prefix(&persistent_config, root);
 681         if (r < 0)
 682                 return r;
 683         r = patch_root_prefix(&runtime_config, root);
 684         if (r < 0)
 685                 return r;
 686
 687         r = patch_root_prefix(&generator, root);
 688         if (r < 0)
 689                 return r;
 690         r = patch_root_prefix(&generator_early, root);
 691         if (r < 0)
 692                 return r;
 693         r = patch_root_prefix(&generator_late, root);
 694         if (r < 0)
 695                 return r;
 696
 697         r = patch_root_prefix(&transient, root);
 698         if (r < 0)
 699                 return r;
 700
 701         r = patch_root_prefix(&persistent_control, root);
 702         if (r < 0)
 703                 return r;
 704         r = patch_root_prefix(&runtime_control, root);
 705         if (r < 0)
 706                 return r;
 707
 708         r = patch_root_prefix(&persistent_attached, root);
 709         if (r < 0)
 710                 return r;
 711         r = patch_root_prefix(&runtime_attached, root);
 712         if (r < 0)
 713                 return r;
 714
 715         r = patch_root_prefix_strv(paths, root);
 716         if (r < 0)
 717                 return -ENOMEM;
 718
 719         *lp = (LookupPaths) {
 720                 .search_path = strv_uniq(TAKE_PTR(paths)),
 721
 722                 .persistent_config = TAKE_PTR(persistent_config),
 723                 .runtime_config = TAKE_PTR(runtime_config),
 724
 725                 .generator = TAKE_PTR(generator),
 726                 .generator_early = TAKE_PTR(generator_early),
 727                 .generator_late = TAKE_PTR(generator_late),
 728
 729                 .transient = TAKE_PTR(transient),
 730
 731                 .persistent_control = TAKE_PTR(persistent_control),
 732                 .runtime_control = TAKE_PTR(runtime_control),
 733
 734                 .persistent_attached = TAKE_PTR(persistent_attached),
 735                 .runtime_attached = TAKE_PTR(runtime_attached),
 736
 737                 .root_dir = TAKE_PTR(root),
 738                 .temporary_dir = TAKE_PTR(tempdir),
 739         };
 740
 741         return 0;
 742 }
 743
 744 int lookup_paths_init_or_warn(LookupPaths *lp, RuntimeScope scope, LookupPathsFlags flags, const char *root_dir) {
 745         int r;
 746
 747         r = lookup_paths_init(lp, scope, flags, root_dir);
 748         if (r < 0)
 749                 return log_error_errno(r, "Failed to initialize unit search paths%s%s: %m",
 750                                        isempty(root_dir) ? "" : " for root directory ", strempty(root_dir));
 751         return r;
 752 }
 753
 754 void lookup_paths_free(LookupPaths *lp) {
 755         if (!lp)
 756                 return;
 757
 758         lp->search_path = strv_free(lp->search_path);
 759
 760         lp->persistent_config = mfree(lp->persistent_config);
 761         lp->runtime_config = mfree(lp->runtime_config);
 762
 763         lp->persistent_attached = mfree(lp->persistent_attached);
 764         lp->runtime_attached = mfree(lp->runtime_attached);
 765
 766         lp->generator = mfree(lp->generator);
 767         lp->generator_early = mfree(lp->generator_early);
 768         lp->generator_late = mfree(lp->generator_late);
 769
 770         lp->transient = mfree(lp->transient);
 771
 772         lp->persistent_control = mfree(lp->persistent_control);
 773         lp->runtime_control = mfree(lp->runtime_control);
 774
 775         lp->root_dir = mfree(lp->root_dir);
 776         lp->temporary_dir = mfree(lp->temporary_dir);
 777 }
 778
 779 void lookup_paths_log(LookupPaths *lp) {
 780         assert(lp);
 781
 782         if (strv_isempty(lp->search_path)) {
 783                 log_debug("Ignoring unit files.");
 784                 lp->search_path = strv_free(lp->search_path);
 785         } else {
 786                 _cleanup_free_ char *t = NULL;
 787
 788                 t = strv_join(lp->search_path, "\n\t");
 789                 log_debug("Looking for unit files in (higher priority first):\n\t%s", strna(t));
 790         }
 791 }
 792
 793 char **generator_binary_paths(RuntimeScope scope) {
 794         bool append = false; /* Add items from SYSTEMD_GENERATOR_PATH before normal directories */
 795         _cleanup_strv_free_ char **paths = NULL;
 796         int r;
 797
 798         /* First priority is whatever has been passed to us via env vars */
 799         r = get_paths_from_environ("SYSTEMD_GENERATOR_PATH", &paths, &append);
 800         if (r < 0)
 801                 return NULL;
 802
 803         if (!paths || append) {
 804                 _cleanup_strv_free_ char **add = NULL;
 805
 806                 switch (scope) {
 807
 808                 case RUNTIME_SCOPE_SYSTEM:
 809                         add = strv_new("/run/systemd/system-generators",
 810                                        "/etc/systemd/system-generators",
 811                                        "/usr/local/lib/systemd/system-generators",
 812                                        SYSTEM_GENERATOR_DIR);
 813                         break;
 814
 815                 case RUNTIME_SCOPE_GLOBAL:
 816                 case RUNTIME_SCOPE_USER:
 817                         add = strv_new("/run/systemd/user-generators",
 818                                        "/etc/systemd/user-generators",
 819                                        "/usr/local/lib/systemd/user-generators",
 820                                        USER_GENERATOR_DIR);
 821                         break;
 822
 823                 default:
 824                         assert_not_reached();
 825                 }
 826                 if (!add)
 827                         return NULL;
 828
 829                 if (paths) {
 830                         r = strv_extend_strv(&paths, add, true);
 831                         if (r < 0)
 832                                 return NULL;
 833                 } else
 834                         /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
 835                          * and don't have to copy anything */
 836                         paths = TAKE_PTR(add);
 837         }
 838
 839         return TAKE_PTR(paths);
 840 }
 841
 842 char **env_generator_binary_paths(RuntimeScope runtime_scope) {
 843         _cleanup_strv_free_ char **paths = NULL, **add = NULL;
 844         bool append = false; /* Add items from SYSTEMD_ENVIRONMENT_GENERATOR_PATH before normal directories */
 845         int r;
 846
 847         /* First priority is whatever has been passed to us via env vars */
 848         r = get_paths_from_environ("SYSTEMD_ENVIRONMENT_GENERATOR_PATH", &paths, &append);
 849         if (r < 0)
 850                 return NULL;
 851
 852         if (!paths || append) {
 853                 switch (runtime_scope) {
 854
 855                 case RUNTIME_SCOPE_SYSTEM:
 856                         add = strv_new("/run/systemd/system-environment-generators",
 857                                         "/etc/systemd/system-environment-generators",
 858                                         "/usr/local/lib/systemd/system-environment-generators",
 859                                         SYSTEM_ENV_GENERATOR_DIR);
 860                         break;
 861
 862                 case RUNTIME_SCOPE_USER:
 863                         add = strv_new("/run/systemd/user-environment-generators",
 864                                        "/etc/systemd/user-environment-generators",
 865                                        "/usr/local/lib/systemd/user-environment-generators",
 866                                        USER_ENV_GENERATOR_DIR);
 867                         break;
 868
 869                 default:
 870                         assert_not_reached();
 871                 }
 872                 if (!add)
 873                         return NULL;
 874         }
 875
 876         if (paths) {
 877                 r = strv_extend_strv(&paths, add, true);
 878                 if (r < 0)
 879                         return NULL;
 880         } else
 881                 /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
 882                  * and don't have to copy anything */
 883                 paths = TAKE_PTR(add);
 884
 885         return TAKE_PTR(paths);
 886 }
 887
 888 int find_portable_profile(const char *name, const char *unit, char **ret_path) {
 889         const char *dot;
 890
 891         assert(name);
 892         assert(ret_path);
 893
 894         assert_se(dot = strrchr(unit, '.'));
 895
 896         NULSTR_FOREACH(p, PORTABLE_PROFILE_DIRS) {
 897                 _cleanup_free_ char *joined = NULL;
 898
 899                 joined = strjoin(p, "/", name, "/", dot + 1, ".conf");
 900                 if (!joined)
 901                         return -ENOMEM;
 902
 903                 if (laccess(joined, F_OK) >= 0) {
 904                         *ret_path = TAKE_PTR(joined);
 905                         return 0;
 906                 }
 907
 908                 if (errno != ENOENT)
 909                         return -errno;
 910         }
 911
 912         return -ENOENT;
 913 }