src/shared/path-lookup.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010 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 <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "alloc-util.h"
  26 #include "install.h"
  27 #include "log.h"
  28 #include "macro.h"
  29 #include "mkdir.h"
  30 #include "path-lookup.h"
  31 #include "path-util.h"
  32 #include "rm-rf.h"
  33 #include "stat-util.h"
  34 #include "string-util.h"
  35 #include "strv.h"
  36 #include "user-util.h"
  37 #include "util.h"
  38
  39 static int user_runtime_dir(char **ret, const char *suffix) {
  40         const char *e;
  41         char *j;
  42
  43         assert(ret);
  44         assert(suffix);
  45
  46         e = getenv("XDG_RUNTIME_DIR");
  47         if (!e)
  48                 return -ENXIO;
  49
  50         j = strappend(e, suffix);
  51         if (!j)
  52                 return -ENOMEM;
  53
  54         *ret = j;
  55         return 0;
  56 }
  57
  58 static int user_config_dir(char **ret, const char *suffix) {
  59         const char *e;
  60         char *j;
  61         int r;
  62
  63         assert(ret);
  64
  65         e = getenv("XDG_CONFIG_HOME");
  66         if (e)
  67                 j = strappend(e, suffix);
  68         else {
  69                 _cleanup_free_ char *home = NULL;
  70
  71                 r = get_home_dir(&home);
  72                 if (r < 0)
  73                         return r;
  74
  75                 j = strjoin(home, "/.config", suffix);
  76         }
  77
  78         if (!j)
  79                 return -ENOMEM;
  80
  81         *ret = j;
  82         return 0;
  83 }
  84
  85 static int user_data_dir(char **ret, const char *suffix) {
  86         const char *e;
  87         char *j;
  88         int r;
  89
  90         assert(ret);
  91         assert(suffix);
  92
  93         /* We don't treat /etc/xdg/systemd here as the spec
  94          * suggests because we assume that is a link to
  95          * /etc/systemd/ anyway. */
  96
  97         e = getenv("XDG_DATA_HOME");
  98         if (e)
  99                 j = strappend(e, suffix);
 100         else {
 101                 _cleanup_free_ char *home = NULL;
 102
 103                 r = get_home_dir(&home);
 104                 if (r < 0)
 105                         return r;
 106
 107                 j = strjoin(home, "/.local/share", suffix);
 108         }
 109         if (!j)
 110                 return -ENOMEM;
 111
 112         *ret = j;
 113         return 1;
 114 }
 115
 116 static char** user_dirs(
 117                 const char *persistent_config,
 118                 const char *runtime_config,
 119                 const char *generator,
 120                 const char *generator_early,
 121                 const char *generator_late,
 122                 const char *transient,
 123                 const char *persistent_control,
 124                 const char *runtime_control) {
 125
 126         const char * const config_unit_paths[] = {
 127                 USER_CONFIG_UNIT_PATH,
 128                 "/etc/systemd/user",
 129                 NULL
 130         };
 131
 132         const char * const data_unit_paths[] = {
 133                 "/usr/local/lib/systemd/user",
 134                 "/usr/local/share/systemd/user",
 135                 USER_DATA_UNIT_PATH,
 136                 "/usr/lib/systemd/user",
 137                 "/usr/share/systemd/user",
 138                 NULL
 139         };
 140
 141         const char *e;
 142         _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
 143         _cleanup_free_ char *data_home = NULL;
 144         _cleanup_strv_free_ char **res = NULL;
 145         char **tmp;
 146         int r;
 147
 148         /* Implement the mechanisms defined in
 149          *
 150          * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
 151          *
 152          * We look in both the config and the data dirs because we
 153          * want to encourage that distributors ship their unit files
 154          * as data, and allow overriding as configuration.
 155          */
 156
 157         e = getenv("XDG_CONFIG_DIRS");
 158         if (e) {
 159                 config_dirs = strv_split(e, ":");
 160                 if (!config_dirs)
 161                         return NULL;
 162         }
 163
 164         r = user_data_dir(&data_home, "/systemd/user");
 165         if (r < 0 && r != -ENXIO)
 166                 return NULL;
 167
 168         e = getenv("XDG_DATA_DIRS");
 169         if (e)
 170                 data_dirs = strv_split(e, ":");
 171         else
 172                 data_dirs = strv_new("/usr/local/share",
 173                                      "/usr/share",
 174                                      NULL);
 175         if (!data_dirs)
 176                 return NULL;
 177
 178         /* Now merge everything we found. */
 179         if (strv_extend(&res, persistent_control) < 0)
 180                 return NULL;
 181
 182         if (strv_extend(&res, runtime_control) < 0)
 183                 return NULL;
 184
 185         if (strv_extend(&res, transient) < 0)
 186                 return NULL;
 187
 188         if (strv_extend(&res, generator_early) < 0)
 189                 return NULL;
 190
 191         if (!strv_isempty(config_dirs))
 192                 if (strv_extend_strv_concat(&res, config_dirs, "/systemd/user") < 0)
 193                         return NULL;
 194
 195         if (strv_extend(&res, persistent_config) < 0)
 196                 return NULL;
 197
 198         if (strv_extend_strv(&res, (char**) config_unit_paths, false) < 0)
 199                 return NULL;
 200
 201         if (strv_extend(&res, runtime_config) < 0)
 202                 return NULL;
 203
 204         if (strv_extend(&res, generator) < 0)
 205                 return NULL;
 206
 207         if (strv_extend(&res, data_home) < 0)
 208                 return NULL;
 209
 210         if (!strv_isempty(data_dirs))
 211                 if (strv_extend_strv_concat(&res, data_dirs, "/systemd/user") < 0)
 212                         return NULL;
 213
 214         if (strv_extend_strv(&res, (char**) data_unit_paths, false) < 0)
 215                 return NULL;
 216
 217         if (strv_extend(&res, generator_late) < 0)
 218                 return NULL;
 219
 220         if (path_strv_make_absolute_cwd(res) < 0)
 221                 return NULL;
 222
 223         tmp = res;
 224         res = NULL;
 225         return tmp;
 226 }
 227
 228 static int acquire_generator_dirs(
 229                 UnitFileScope scope,
 230                 char **generator,
 231                 char **generator_early,
 232                 char **generator_late) {
 233
 234         _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL;
 235         const char *prefix;
 236
 237         assert(generator);
 238         assert(generator_early);
 239         assert(generator_late);
 240
 241         switch (scope) {
 242
 243         case UNIT_FILE_SYSTEM:
 244                 prefix = "/run/systemd/";
 245                 break;
 246
 247         case UNIT_FILE_USER: {
 248                 const char *e;
 249
 250                 e = getenv("XDG_RUNTIME_DIR");
 251                 if (!e)
 252                         return -ENXIO;
 253
 254                 prefix = strjoina(e, "/systemd/");
 255                 break;
 256         }
 257
 258         case UNIT_FILE_GLOBAL:
 259                 return -EOPNOTSUPP;
 260
 261         default:
 262                 assert_not_reached("Hmm, unexpected scope value.");
 263         }
 264
 265         x = strappend(prefix, "generator");
 266         if (!x)
 267                 return -ENOMEM;
 268
 269         y = strappend(prefix, "generator.early");
 270         if (!y)
 271                 return -ENOMEM;
 272
 273         z = strappend(prefix, "generator.late");
 274         if (!z)
 275                 return -ENOMEM;
 276
 277         *generator = x;
 278         *generator_early = y;
 279         *generator_late = z;
 280
 281         x = y = z = NULL;
 282         return 0;
 283 }
 284
 285 static int acquire_transient_dir(UnitFileScope scope, char **ret) {
 286         assert(ret);
 287
 288         switch (scope) {
 289
 290         case UNIT_FILE_SYSTEM: {
 291                 char *transient;
 292
 293                 transient = strdup("/run/systemd/transient");
 294                 if (!transient)
 295                         return -ENOMEM;
 296
 297                 *ret = transient;
 298                 return 0;
 299         }
 300
 301         case UNIT_FILE_USER:
 302                 return user_runtime_dir(ret, "/systemd/transient");
 303
 304         case UNIT_FILE_GLOBAL:
 305                 return -EOPNOTSUPP;
 306
 307         default:
 308                 assert_not_reached("Hmm, unexpected scope value.");
 309         }
 310 }
 311
 312 static int acquire_config_dirs(UnitFileScope scope, char **persistent, char **runtime) {
 313         _cleanup_free_ char *a = NULL, *b = NULL;
 314         int r;
 315
 316         assert(persistent);
 317         assert(runtime);
 318
 319         switch (scope) {
 320
 321         case UNIT_FILE_SYSTEM:
 322                 a = strdup(SYSTEM_CONFIG_UNIT_PATH);
 323                 b = strdup("/run/systemd/system");
 324                 break;
 325
 326         case UNIT_FILE_GLOBAL:
 327                 a = strdup(USER_CONFIG_UNIT_PATH);
 328                 b = strdup("/run/systemd/user");
 329                 break;
 330
 331         case UNIT_FILE_USER:
 332                 r = user_config_dir(&a, "/systemd/user");
 333                 if (r < 0)
 334                         return r;
 335
 336                 r = user_runtime_dir(runtime, "/systemd/user");
 337                 if (r < 0)
 338                         return r;
 339
 340                 *persistent = a;
 341                 a = NULL;
 342
 343                 return 0;
 344
 345         default:
 346                 assert_not_reached("Hmm, unexpected scope value.");
 347         }
 348
 349         if (!a || !b)
 350                 return -ENOMEM;
 351
 352         *persistent = a;
 353         *runtime = b;
 354         a = b = NULL;
 355
 356         return 0;
 357 }
 358
 359 static int acquire_control_dirs(UnitFileScope scope, char **persistent, char **runtime) {
 360         _cleanup_free_ char *a = NULL;
 361         int r;
 362
 363         assert(persistent);
 364         assert(runtime);
 365
 366         switch (scope) {
 367
 368         case UNIT_FILE_SYSTEM:  {
 369                 _cleanup_free_ char *b = NULL;
 370
 371                 a = strdup("/etc/systemd/system.control");
 372                 if (!a)
 373                         return -ENOMEM;
 374
 375                 b = strdup("/run/systemd/system.control");
 376                 if (!b)
 377                         return -ENOMEM;
 378
 379                 *runtime = b;
 380                 b = NULL;
 381
 382                 break;
 383         }
 384
 385         case UNIT_FILE_USER:
 386                 r = user_config_dir(&a, "/systemd/system.control");
 387                 if (r < 0)
 388                         return r;
 389
 390                 r = user_runtime_dir(runtime, "/systemd/system.control");
 391                 if (r < 0)
 392                         return r;
 393
 394                 break;
 395
 396         case UNIT_FILE_GLOBAL:
 397                 return -EOPNOTSUPP;
 398
 399         default:
 400                 assert_not_reached("Hmm, unexpected scope value.");
 401         }
 402
 403         *persistent = a;
 404         a = NULL;
 405
 406         return 0;
 407 }
 408
 409 static int patch_root_prefix(char **p, const char *root_dir) {
 410         char *c;
 411
 412         assert(p);
 413
 414         if (!*p)
 415                 return 0;
 416
 417         c = prefix_root(root_dir, *p);
 418         if (!c)
 419                 return -ENOMEM;
 420
 421         free(*p);
 422         *p = c;
 423
 424         return 0;
 425 }
 426
 427 static int patch_root_prefix_strv(char **l, const char *root_dir) {
 428         char **i;
 429         int r;
 430
 431         if (!root_dir)
 432                 return 0;
 433
 434         STRV_FOREACH(i, l) {
 435                 r = patch_root_prefix(i, root_dir);
 436                 if (r < 0)
 437                         return r;
 438         }
 439
 440         return 0;
 441 }
 442
 443 int lookup_paths_init(
 444                 LookupPaths *p,
 445                 UnitFileScope scope,
 446                 LookupPathsFlags flags,
 447                 const char *root_dir) {
 448
 449         _cleanup_free_ char
 450                 *root = NULL,
 451                 *persistent_config = NULL, *runtime_config = NULL,
 452                 *generator = NULL, *generator_early = NULL, *generator_late = NULL,
 453                 *transient = NULL,
 454                 *persistent_control = NULL, *runtime_control = NULL;
 455         bool append = false; /* Add items from SYSTEMD_UNIT_PATH before normal directories */
 456         _cleanup_strv_free_ char **paths = NULL;
 457         const char *e;
 458         int r;
 459
 460         assert(p);
 461         assert(scope >= 0);
 462         assert(scope < _UNIT_FILE_SCOPE_MAX);
 463
 464         if (!isempty(root_dir) && !path_equal(root_dir, "/")) {
 465                 if (scope == UNIT_FILE_USER)
 466                         return -EINVAL;
 467
 468                 r = is_dir(root_dir, true);
 469                 if (r < 0)
 470                         return r;
 471                 if (r == 0)
 472                         return -ENOTDIR;
 473
 474                 root = strdup(root_dir);
 475                 if (!root)
 476                         return -ENOMEM;
 477         }
 478
 479         r = acquire_config_dirs(scope, &persistent_config, &runtime_config);
 480         if (r < 0 && r != -ENXIO)
 481                 return r;
 482
 483         if ((flags & LOOKUP_PATHS_EXCLUDE_GENERATED) == 0) {
 484                 r = acquire_generator_dirs(scope, &generator, &generator_early, &generator_late);
 485                 if (r < 0 && r != -EOPNOTSUPP && r != -ENXIO)
 486                         return r;
 487         }
 488
 489         r = acquire_transient_dir(scope, &transient);
 490         if (r < 0 && r != -EOPNOTSUPP && r != -ENXIO)
 491                 return r;
 492
 493         r = acquire_control_dirs(scope, &persistent_control, &runtime_control);
 494         if (r < 0 && r != -EOPNOTSUPP && r != -ENXIO)
 495                 return r;
 496
 497         /* First priority is whatever has been passed to us via env vars */
 498         e = getenv("SYSTEMD_UNIT_PATH");
 499         if (e) {
 500                 const char *k;
 501
 502                 k = endswith(e, ":");
 503                 if (k) {
 504                         e = strndupa(e, k - e);
 505                         append = true;
 506                 }
 507
 508                 /* FIXME: empty components in other places should be
 509                  * rejected. */
 510
 511                 r = path_split_and_make_absolute(e, &paths);
 512                 if (r < 0)
 513                         return r;
 514         }
 515
 516         if (!paths || append) {
 517                 /* Let's figure something out. */
 518
 519                 _cleanup_strv_free_ char **add = NULL;
 520
 521                 /* For the user units we include share/ in the search
 522                  * path in order to comply with the XDG basedir spec.
 523                  * For the system stuff we avoid such nonsense. OTOH
 524                  * we include /lib in the search path for the system
 525                  * stuff but avoid it for user stuff. */
 526
 527                 switch (scope) {
 528
 529                 case UNIT_FILE_SYSTEM:
 530                         add = strv_new(
 531                                         /* If you modify this you also want to modify
 532                                          * systemdsystemunitpath= in systemd.pc.in! */
 533                                         STRV_IFNOTNULL(persistent_control),
 534                                         STRV_IFNOTNULL(runtime_control),
 535                                         STRV_IFNOTNULL(transient),
 536                                         STRV_IFNOTNULL(generator_early),
 537                                         persistent_config,
 538                                         SYSTEM_CONFIG_UNIT_PATH,
 539                                         "/etc/systemd/system",
 540                                         runtime_config,
 541                                         "/run/systemd/system",
 542                                         STRV_IFNOTNULL(generator),
 543                                         "/usr/local/lib/systemd/system",
 544                                         SYSTEM_DATA_UNIT_PATH,
 545                                         "/usr/lib/systemd/system",
 546 #ifdef HAVE_SPLIT_USR
 547                                         "/lib/systemd/system",
 548 #endif
 549                                         STRV_IFNOTNULL(generator_late),
 550                                         NULL);
 551                         break;
 552
 553                 case UNIT_FILE_GLOBAL:
 554                         add = strv_new(
 555                                         /* If you modify this you also want to modify
 556                                          * systemduserunitpath= in systemd.pc.in, and
 557                                          * the arrays in user_dirs() above! */
 558                                         STRV_IFNOTNULL(persistent_control),
 559                                         STRV_IFNOTNULL(runtime_control),
 560                                         STRV_IFNOTNULL(transient),
 561                                         STRV_IFNOTNULL(generator_early),
 562                                         persistent_config,
 563                                         USER_CONFIG_UNIT_PATH,
 564                                         "/etc/systemd/user",
 565                                         runtime_config,
 566                                         "/run/systemd/user",
 567                                         STRV_IFNOTNULL(generator),
 568                                         "/usr/local/lib/systemd/user",
 569                                         "/usr/local/share/systemd/user",
 570                                         USER_DATA_UNIT_PATH,
 571                                         "/usr/lib/systemd/user",
 572                                         "/usr/share/systemd/user",
 573                                         STRV_IFNOTNULL(generator_late),
 574                                         NULL);
 575                         break;
 576
 577                 case UNIT_FILE_USER:
 578                         add = user_dirs(persistent_config, runtime_config,
 579                                         generator, generator_early, generator_late,
 580                                         transient,
 581                                         persistent_config, runtime_control);
 582                         break;
 583
 584                 default:
 585                         assert_not_reached("Hmm, unexpected scope?");
 586                 }
 587
 588                 if (!add)
 589                         return -ENOMEM;
 590
 591                 if (paths) {
 592                         r = strv_extend_strv(&paths, add, true);
 593                         if (r < 0)
 594                                 return r;
 595                 } else {
 596                         /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
 597                          * and don't have to copy anything */
 598                         paths = add;
 599                         add = NULL;
 600                 }
 601         }
 602
 603         r = patch_root_prefix(&persistent_config, root);
 604         if (r < 0)
 605                 return r;
 606         r = patch_root_prefix(&runtime_config, root);
 607         if (r < 0)
 608                 return r;
 609
 610         r = patch_root_prefix(&generator, root);
 611         if (r < 0)
 612                 return r;
 613         r = patch_root_prefix(&generator_early, root);
 614         if (r < 0)
 615                 return r;
 616         r = patch_root_prefix(&generator_late, root);
 617         if (r < 0)
 618                 return r;
 619
 620         r = patch_root_prefix(&transient, root);
 621         if (r < 0)
 622                 return r;
 623
 624         r = patch_root_prefix(&persistent_control, root);
 625         if (r < 0)
 626                 return r;
 627
 628         r = patch_root_prefix(&runtime_control, root);
 629         if (r < 0)
 630                 return r;
 631
 632         r = patch_root_prefix_strv(paths, root);
 633         if (r < 0)
 634                 return -ENOMEM;
 635
 636         p->search_path = strv_uniq(paths);
 637         paths = NULL;
 638
 639         p->persistent_config = persistent_config;
 640         p->runtime_config = runtime_config;
 641         persistent_config = runtime_config = NULL;
 642
 643         p->generator = generator;
 644         p->generator_early = generator_early;
 645         p->generator_late = generator_late;
 646         generator = generator_early = generator_late = NULL;
 647
 648         p->transient = transient;
 649         transient = NULL;
 650
 651         p->persistent_control = persistent_control;
 652         p->runtime_control = runtime_control;
 653         persistent_control = runtime_control = NULL;
 654
 655         p->root_dir = root;
 656         root = NULL;
 657
 658         return 0;
 659 }
 660
 661 void lookup_paths_free(LookupPaths *p) {
 662         if (!p)
 663                 return;
 664
 665         p->search_path = strv_free(p->search_path);
 666
 667         p->persistent_config = mfree(p->persistent_config);
 668         p->runtime_config = mfree(p->runtime_config);
 669
 670         p->generator = mfree(p->generator);
 671         p->generator_early = mfree(p->generator_early);
 672         p->generator_late = mfree(p->generator_late);
 673
 674         p->transient = mfree(p->transient);
 675
 676         p->persistent_control = mfree(p->persistent_control);
 677         p->runtime_control = mfree(p->runtime_control);
 678
 679         p->root_dir = mfree(p->root_dir);
 680 }
 681
 682 int lookup_paths_reduce(LookupPaths *p) {
 683         _cleanup_free_ struct stat *stats = NULL;
 684         size_t n_stats = 0, allocated = 0;
 685         unsigned c = 0;
 686         int r;
 687
 688         assert(p);
 689
 690         /* Drop duplicates and non-existing directories from the search path. We figure out whether two directories are
 691          * the same by comparing their device and inode numbers. Note one special tweak: when we have a root path set,
 692          * we do not follow symlinks when retrieving them, because the kernel wouldn't take the root prefix into
 693          * account when following symlinks. When we have no root path set this restriction does not apply however. */
 694
 695         if (!p->search_path)
 696                 return 0;
 697
 698         while (p->search_path[c]) {
 699                 struct stat st;
 700                 unsigned k;
 701
 702                 if (p->root_dir)
 703                         r = lstat(p->search_path[c], &st);
 704                 else
 705                         r = stat(p->search_path[c], &st);
 706                 if (r < 0) {
 707                         if (errno == ENOENT)
 708                                 goto remove_item;
 709
 710                         /* If something we don't grok happened, let's better leave it in. */
 711                         log_debug_errno(errno, "Failed to stat %s: %m", p->search_path[c]);
 712                         c++;
 713                         continue;
 714                 }
 715
 716                 for (k = 0; k < n_stats; k++) {
 717                         if (stats[k].st_dev == st.st_dev &&
 718                             stats[k].st_ino == st.st_ino)
 719                                 break;
 720                 }
 721
 722                 if (k < n_stats) /* Is there already an entry with the same device/inode? */
 723                         goto remove_item;
 724
 725                 if (!GREEDY_REALLOC(stats, allocated, n_stats+1))
 726                         return -ENOMEM;
 727
 728                 stats[n_stats++] = st;
 729                 c++;
 730                 continue;
 731
 732         remove_item:
 733                 free(p->search_path[c]);
 734                 memmove(p->search_path + c,
 735                         p->search_path + c + 1,
 736                         (strv_length(p->search_path + c + 1) + 1) * sizeof(char*));
 737         }
 738
 739         if (strv_isempty(p->search_path)) {
 740                 log_debug("Ignoring unit files.");
 741                 p->search_path = strv_free(p->search_path);
 742         } else {
 743                 _cleanup_free_ char *t;
 744
 745                 t = strv_join(p->search_path, "\n\t");
 746                 if (!t)
 747                         return -ENOMEM;
 748
 749                 log_debug("Looking for unit files in (higher priority first):\n\t%s", t);
 750         }
 751
 752         return 0;
 753 }
 754
 755 int lookup_paths_mkdir_generator(LookupPaths *p) {
 756         int r, q;
 757
 758         assert(p);
 759
 760         if (!p->generator || !p->generator_early || !p->generator_late)
 761                 return -EINVAL;
 762
 763         r = mkdir_p_label(p->generator, 0755);
 764
 765         q = mkdir_p_label(p->generator_early, 0755);
 766         if (q < 0 && r >= 0)
 767                 r = q;
 768
 769         q = mkdir_p_label(p->generator_late, 0755);
 770         if (q < 0 && r >= 0)
 771                 r = q;
 772
 773         return r;
 774 }
 775
 776 void lookup_paths_trim_generator(LookupPaths *p) {
 777         assert(p);
 778
 779         /* Trim empty dirs */
 780
 781         if (p->generator)
 782                 (void) rmdir(p->generator);
 783         if (p->generator_early)
 784                 (void) rmdir(p->generator_early);
 785         if (p->generator_late)
 786                 (void) rmdir(p->generator_late);
 787 }
 788
 789 void lookup_paths_flush_generator(LookupPaths *p) {
 790         assert(p);
 791
 792         /* Flush the generated unit files in full */
 793
 794         if (p->generator)
 795                 (void) rm_rf(p->generator, REMOVE_ROOT);
 796         if (p->generator_early)
 797                 (void) rm_rf(p->generator_early, REMOVE_ROOT);
 798         if (p->generator_late)
 799                 (void) rm_rf(p->generator_late, REMOVE_ROOT);
 800 }
 801
 802 char **generator_binary_paths(UnitFileScope scope) {
 803
 804         switch (scope) {
 805
 806         case UNIT_FILE_SYSTEM:
 807                 return strv_new("/run/systemd/system-generators",
 808                                 "/etc/systemd/system-generators",
 809                                 "/usr/local/lib/systemd/system-generators",
 810                                 SYSTEM_GENERATOR_PATH,
 811                                 NULL);
 812
 813         case UNIT_FILE_GLOBAL:
 814         case UNIT_FILE_USER:
 815                 return strv_new("/run/systemd/user-generators",
 816                                 "/etc/systemd/user-generators",
 817                                 "/usr/local/lib/systemd/user-generators",
 818                                 USER_GENERATOR_PATH,
 819                                 NULL);
 820
 821         default:
 822                 assert_not_reached("Hmm, unexpected scope.");
 823         }
 824 }