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