src/tmpfiles.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering, Kay Sievers
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 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   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <unistd.h>
  23 #include <fcntl.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 #include <sys/stat.h>
  27 #include <limits.h>
  28 #include <dirent.h>
  29 #include <grp.h>
  30 #include <pwd.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <stddef.h>
  34 #include <getopt.h>
  35 #include <stdbool.h>
  36 #include <time.h>
  37 #include <sys/types.h>
  38 #include <sys/param.h>
  39 #include <glob.h>
  40 #include <fnmatch.h>
  41
  42 #include "log.h"
  43 #include "util.h"
  44 #include "strv.h"
  45 #include "label.h"
  46 #include "set.h"
  47
  48 /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
  49  * them in the file system. This is intended to be used to create
  50  * properly owned directories beneath /tmp, /var/tmp, /run, which are
  51  * volatile and hence need to be recreated on bootup. */
  52
  53 typedef enum ItemType {
  54         /* These ones take file names */
  55         CREATE_FILE = 'f',
  56         TRUNCATE_FILE = 'F',
  57         CREATE_DIRECTORY = 'd',
  58         TRUNCATE_DIRECTORY = 'D',
  59         CREATE_FIFO = 'p',
  60
  61         /* These ones take globs */
  62         IGNORE_PATH = 'x',
  63         REMOVE_PATH = 'r',
  64         RECURSIVE_REMOVE_PATH = 'R',
  65         RECURSIVE_RELABEL_PATH = 'Z'
  66 } ItemType;
  67
  68 typedef struct Item {
  69         ItemType type;
  70
  71         char *path;
  72         uid_t uid;
  73         gid_t gid;
  74         mode_t mode;
  75         usec_t age;
  76
  77         bool uid_set:1;
  78         bool gid_set:1;
  79         bool mode_set:1;
  80         bool age_set:1;
  81 } Item;
  82
  83 static Hashmap *items = NULL, *globs = NULL;
  84 static Set *unix_sockets = NULL;
  85
  86 static bool arg_create = false;
  87 static bool arg_clean = false;
  88 static bool arg_remove = false;
  89
  90 static const char *arg_prefix = NULL;
  91
  92 #define MAX_DEPTH 256
  93
  94 static bool needs_glob(ItemType t) {
  95         return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RECURSIVE_RELABEL_PATH;
  96 }
  97
  98 static struct Item* find_glob(Hashmap *h, const char *match) {
  99         Item *j;
 100         Iterator i;
 101
 102         HASHMAP_FOREACH(j, h, i)
 103                 if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
 104                         return j;
 105
 106         return NULL;
 107 }
 108
 109 static void load_unix_sockets(void) {
 110         FILE *f = NULL;
 111         char line[LINE_MAX];
 112
 113         if (unix_sockets)
 114                 return;
 115
 116         /* We maintain a cache of the sockets we found in
 117          * /proc/net/unix to speed things up a little. */
 118
 119         if (!(unix_sockets = set_new(string_hash_func, string_compare_func)))
 120                 return;
 121
 122         if (!(f = fopen("/proc/net/unix", "re")))
 123                 return;
 124
 125         if (!(fgets(line, sizeof(line), f)))
 126                 goto fail;
 127
 128         for (;;) {
 129                 char *p, *s;
 130                 int k;
 131
 132                 if (!(fgets(line, sizeof(line), f)))
 133                         break;
 134
 135                 truncate_nl(line);
 136
 137                 if (strlen(line) < 53)
 138                         continue;
 139
 140                 p = line + 53;
 141                 p += strspn(p, WHITESPACE);
 142                 p += strcspn(p, WHITESPACE);
 143                 p += strspn(p, WHITESPACE);
 144
 145                 if (*p != '/')
 146                         continue;
 147
 148                 if (!(s = strdup(p)))
 149                         goto fail;
 150
 151                 path_kill_slashes(s);
 152
 153                 if ((k = set_put(unix_sockets, s)) < 0) {
 154                         free(s);
 155
 156                         if (k != -EEXIST)
 157                                 goto fail;
 158                 }
 159         }
 160
 161         fclose(f);
 162         return;
 163
 164 fail:
 165         set_free_free(unix_sockets);
 166         unix_sockets = NULL;
 167
 168         if (f)
 169                 fclose(f);
 170 }
 171
 172 static bool unix_socket_alive(const char *fn) {
 173         assert(fn);
 174
 175         load_unix_sockets();
 176
 177         if (unix_sockets)
 178                 return !!set_get(unix_sockets, (char*) fn);
 179
 180         /* We don't know, so assume yes */
 181         return true;
 182 }
 183
 184 static int dir_cleanup(
 185                 const char *p,
 186                 DIR *d,
 187                 const struct stat *ds,
 188                 usec_t cutoff,
 189                 dev_t rootdev,
 190                 bool mountpoint,
 191                 int maxdepth)
 192 {
 193         struct dirent *dent;
 194         struct timespec times[2];
 195         bool deleted = false;
 196         char *sub_path = NULL;
 197         int r = 0;
 198
 199         while ((dent = readdir(d))) {
 200                 struct stat s;
 201                 usec_t age;
 202
 203                 if (streq(dent->d_name, ".") ||
 204                     streq(dent->d_name, ".."))
 205                         continue;
 206
 207                 if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
 208
 209                         if (errno != ENOENT) {
 210                                 log_error("stat(%s/%s) failed: %m", p, dent->d_name);
 211                                 r = -errno;
 212                         }
 213
 214                         continue;
 215                 }
 216
 217                 /* Stay on the same filesystem */
 218                 if (s.st_dev != rootdev)
 219                         continue;
 220
 221                 /* Do not delete read-only files owned by root */
 222                 if (s.st_uid == 0 && !(s.st_mode & S_IWUSR))
 223                         continue;
 224
 225                 free(sub_path);
 226                 sub_path = NULL;
 227
 228                 if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) {
 229                         log_error("Out of memory");
 230                         r = -ENOMEM;
 231                         goto finish;
 232                 }
 233
 234                 /* Is there an item configured for this path? */
 235                 if (hashmap_get(items, sub_path))
 236                         continue;
 237
 238                 if (find_glob(globs, sub_path))
 239                         continue;
 240
 241                 if (S_ISDIR(s.st_mode)) {
 242
 243                         if (mountpoint &&
 244                             streq(dent->d_name, "lost+found") &&
 245                             s.st_uid == 0)
 246                                 continue;
 247
 248                         if (maxdepth <= 0)
 249                                 log_warning("Reached max depth on %s.", sub_path);
 250                         else {
 251                                 DIR *sub_dir;
 252                                 int q;
 253
 254                                 sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW);
 255                                 if (sub_dir == NULL) {
 256                                         if (errno != ENOENT) {
 257                                                 log_error("opendir(%s/%s) failed: %m", p, dent->d_name);
 258                                                 r = -errno;
 259                                         }
 260
 261                                         continue;
 262                                 }
 263
 264                                 q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1);
 265                                 closedir(sub_dir);
 266
 267                                 if (q < 0)
 268                                         r = q;
 269                         }
 270
 271                         /* Ignore ctime, we change it when deleting */
 272                         age = MAX(timespec_load(&s.st_mtim),
 273                                   timespec_load(&s.st_atim));
 274                         if (age >= cutoff)
 275                                 continue;
 276
 277                         log_debug("rmdir '%s'\n", sub_path);
 278
 279                         if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) {
 280                                 if (errno != ENOENT && errno != ENOTEMPTY) {
 281                                         log_error("rmdir(%s): %m", sub_path);
 282                                         r = -errno;
 283                                 }
 284                         }
 285
 286                 } else {
 287                         /* Skip files for which the sticky bit is
 288                          * set. These are semantics we define, and are
 289                          * unknown elsewhere. See XDG_RUNTIME_DIR
 290                          * specification for details. */
 291                         if (s.st_mode & S_ISVTX)
 292                                 continue;
 293
 294                         if (mountpoint && S_ISREG(s.st_mode)) {
 295                                 if (streq(dent->d_name, ".journal") &&
 296                                     s.st_uid == 0)
 297                                         continue;
 298
 299                                 if (streq(dent->d_name, "aquota.user") ||
 300                                     streq(dent->d_name, "aquota.group"))
 301                                         continue;
 302                         }
 303
 304                         /* Ignore sockets that are listed in /proc/net/unix */
 305                         if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path))
 306                                 continue;
 307
 308                         /* Ignore device nodes */
 309                         if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode))
 310                                 continue;
 311
 312                         age = MAX3(timespec_load(&s.st_mtim),
 313                                    timespec_load(&s.st_atim),
 314                                    timespec_load(&s.st_ctim));
 315
 316                         if (age >= cutoff)
 317                                 continue;
 318
 319                         log_debug("unlink '%s'\n", sub_path);
 320
 321                         if (unlinkat(dirfd(d), dent->d_name, 0) < 0) {
 322                                 if (errno != ENOENT) {
 323                                         log_error("unlink(%s): %m", sub_path);
 324                                         r = -errno;
 325                                 }
 326                         }
 327
 328                         deleted = true;
 329                 }
 330         }
 331
 332 finish:
 333         if (deleted) {
 334                 /* Restore original directory timestamps */
 335                 times[0] = ds->st_atim;
 336                 times[1] = ds->st_mtim;
 337
 338                 if (futimens(dirfd(d), times) < 0)
 339                         log_error("utimensat(%s): %m", p);
 340         }
 341
 342         free(sub_path);
 343
 344         return r;
 345 }
 346
 347 static int clean_item(Item *i) {
 348         DIR *d;
 349         struct stat s, ps;
 350         bool mountpoint;
 351         int r;
 352         usec_t cutoff, n;
 353
 354         assert(i);
 355
 356         if (i->type != CREATE_DIRECTORY &&
 357             i->type != TRUNCATE_DIRECTORY &&
 358             i->type != IGNORE_PATH)
 359                 return 0;
 360
 361         if (!i->age_set || i->age <= 0)
 362                 return 0;
 363
 364         n = now(CLOCK_REALTIME);
 365         if (n < i->age)
 366                 return 0;
 367
 368         cutoff = n - i->age;
 369
 370         d = opendir(i->path);
 371         if (!d) {
 372                 if (errno == ENOENT)
 373                         return 0;
 374
 375                 log_error("Failed to open directory %s: %m", i->path);
 376                 return -errno;
 377         }
 378
 379         if (fstat(dirfd(d), &s) < 0) {
 380                 log_error("stat(%s) failed: %m", i->path);
 381                 r = -errno;
 382                 goto finish;
 383         }
 384
 385         if (!S_ISDIR(s.st_mode)) {
 386                 log_error("%s is not a directory.", i->path);
 387                 r = -ENOTDIR;
 388                 goto finish;
 389         }
 390
 391         if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) {
 392                 log_error("stat(%s/..) failed: %m", i->path);
 393                 r = -errno;
 394                 goto finish;
 395         }
 396
 397         mountpoint = s.st_dev != ps.st_dev ||
 398                      (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino);
 399
 400         r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH);
 401
 402 finish:
 403         if (d)
 404                 closedir(d);
 405
 406         return r;
 407 }
 408
 409 static int item_set_perms(Item *i, const char *path) {
 410         /* not using i->path directly because it may be a glob */
 411         if (i->mode_set)
 412                 if (chmod(path, i->mode) < 0) {
 413                         log_error("chmod(%s) failed: %m", path);
 414                         return -errno;
 415                 }
 416
 417         if (i->uid_set || i->gid_set)
 418                 if (chown(path,
 419                           i->uid_set ? i->uid : (uid_t) -1,
 420                           i->gid_set ? i->gid : (gid_t) -1) < 0) {
 421
 422                         log_error("chown(%s) failed: %m", path);
 423                         return -errno;
 424                 }
 425
 426         return label_fix(path, false);
 427 }
 428
 429 static int recursive_relabel_children(Item *i, const char *path) {
 430         DIR *d;
 431         int ret = 0;
 432
 433         /* This returns the first error we run into, but nevertheless
 434          * tries to go on */
 435
 436         d = opendir(path);
 437         if (!d)
 438                 return errno == ENOENT ? 0 : -errno;
 439
 440         for (;;) {
 441                 struct dirent buf, *de;
 442                 bool is_dir;
 443                 int r;
 444                 char *entry_path;
 445
 446                 r = readdir_r(d, &buf, &de);
 447                 if (r != 0) {
 448                         if (ret == 0)
 449                                 ret = -r;
 450                         break;
 451                 }
 452
 453                 if (!de)
 454                         break;
 455
 456                 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
 457                         continue;
 458
 459                 if (asprintf(&entry_path, "%s/%s", path, de->d_name) < 0) {
 460                         if (ret == 0)
 461                                 ret = -ENOMEM;
 462                         continue;
 463                 }
 464
 465                 if (de->d_type == DT_UNKNOWN) {
 466                         struct stat st;
 467
 468                         if (lstat(entry_path, &st) < 0) {
 469                                 if (ret == 0 && errno != ENOENT)
 470                                         ret = -errno;
 471                                 free(entry_path);
 472                                 continue;
 473                         }
 474
 475                         is_dir = S_ISDIR(st.st_mode);
 476
 477                 } else
 478                         is_dir = de->d_type == DT_DIR;
 479
 480                 r = item_set_perms(i, entry_path);
 481                 if (r < 0) {
 482                         if (ret == 0 && r != -ENOENT)
 483                                 ret = r;
 484                         free(entry_path);
 485                         continue;
 486                 }
 487
 488                 if (is_dir) {
 489                         r = recursive_relabel_children(i, entry_path);
 490                         if (r < 0 && ret == 0)
 491                                 ret = r;
 492                 }
 493
 494                 free(entry_path);
 495         }
 496
 497         closedir(d);
 498
 499         return ret;
 500 }
 501
 502 static int recursive_relabel(Item *i, const char *path) {
 503         int r;
 504         struct stat st;
 505
 506         r = item_set_perms(i, path);
 507         if (r < 0)
 508                 return r;
 509
 510         if (lstat(path, &st) < 0)
 511                 return -errno;
 512
 513         if (S_ISDIR(st.st_mode))
 514                 r = recursive_relabel_children(i, path);
 515
 516         return r;
 517 }
 518
 519 static int glob_item(Item *i, int (*action)(Item *, const char *)) {
 520         int r = 0, k;
 521         glob_t g;
 522         char **fn;
 523
 524         zero(g);
 525
 526         errno = 0;
 527         if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) {
 528
 529                 if (k != GLOB_NOMATCH) {
 530                         if (errno != 0)
 531                                 errno = EIO;
 532
 533                         log_error("glob(%s) failed: %m", i->path);
 534                         return -errno;
 535                 }
 536         }
 537
 538         STRV_FOREACH(fn, g.gl_pathv)
 539                 if ((k = action(i, *fn)) < 0)
 540                         r = k;
 541
 542         globfree(&g);
 543         return r;
 544 }
 545
 546 static int create_item(Item *i) {
 547         int r;
 548         mode_t u;
 549         struct stat st;
 550
 551         assert(i);
 552
 553         switch (i->type) {
 554
 555         case IGNORE_PATH:
 556         case REMOVE_PATH:
 557         case RECURSIVE_REMOVE_PATH:
 558                 return 0;
 559
 560         case CREATE_FILE:
 561         case TRUNCATE_FILE: {
 562                 int fd;
 563
 564                 u = umask(0);
 565                 fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW|
 566                           (i->type == TRUNCATE_FILE ? O_TRUNC : 0), i->mode);
 567                 umask(u);
 568
 569                 if (fd < 0) {
 570                         log_error("Failed to create file %s: %m", i->path);
 571                         return -errno;
 572                 }
 573
 574                 close_nointr_nofail(fd);
 575
 576                 if (stat(i->path, &st) < 0) {
 577                         log_error("stat(%s) failed: %m", i->path);
 578                         return -errno;
 579                 }
 580
 581                 if (!S_ISREG(st.st_mode)) {
 582                         log_error("%s is not a file.", i->path);
 583                         return -EEXIST;
 584                 }
 585
 586                 r = item_set_perms(i, i->path);
 587                 if (r < 0)
 588                         return r;
 589
 590                 break;
 591         }
 592
 593         case TRUNCATE_DIRECTORY:
 594         case CREATE_DIRECTORY:
 595
 596                 u = umask(0);
 597                 mkdir_parents(i->path, 0755);
 598                 r = mkdir(i->path, i->mode);
 599                 umask(u);
 600
 601                 if (r < 0 && errno != EEXIST) {
 602                         log_error("Failed to create directory %s: %m", i->path);
 603                         return -errno;
 604                 }
 605
 606                 if (stat(i->path, &st) < 0) {
 607                         log_error("stat(%s) failed: %m", i->path);
 608                         return -errno;
 609                 }
 610
 611                 if (!S_ISDIR(st.st_mode)) {
 612                         log_error("%s is not a directory.", i->path);
 613                         return -EEXIST;
 614                 }
 615
 616                 r = item_set_perms(i, i->path);
 617                 if (r < 0)
 618                         return r;
 619
 620                 break;
 621
 622         case CREATE_FIFO:
 623
 624                 u = umask(0);
 625                 r = mkfifo(i->path, i->mode);
 626                 umask(u);
 627
 628                 if (r < 0 && errno != EEXIST) {
 629                         log_error("Failed to create fifo %s: %m", i->path);
 630                         return -errno;
 631                 }
 632
 633                 if (stat(i->path, &st) < 0) {
 634                         log_error("stat(%s) failed: %m", i->path);
 635                         return -errno;
 636                 }
 637
 638                 if (!S_ISFIFO(st.st_mode)) {
 639                         log_error("%s is not a fifo.", i->path);
 640                         return -EEXIST;
 641                 }
 642
 643                 r = item_set_perms(i, i->path);
 644                 if (r < 0)
 645                         return r;
 646
 647                 break;
 648
 649         case RECURSIVE_RELABEL_PATH:
 650
 651                 r = glob_item(i, recursive_relabel);
 652                 if (r < 0)
 653                         return r;
 654         }
 655
 656         log_debug("%s created successfully.", i->path);
 657
 658         return 0;
 659 }
 660
 661 static int remove_item_instance(Item *i, const char *instance) {
 662         int r;
 663
 664         assert(i);
 665
 666         switch (i->type) {
 667
 668         case CREATE_FILE:
 669         case TRUNCATE_FILE:
 670         case CREATE_DIRECTORY:
 671         case CREATE_FIFO:
 672         case IGNORE_PATH:
 673         case RECURSIVE_RELABEL_PATH:
 674                 break;
 675
 676         case REMOVE_PATH:
 677                 if (remove(instance) < 0 && errno != ENOENT) {
 678                         log_error("remove(%s): %m", instance);
 679                         return -errno;
 680                 }
 681
 682                 break;
 683
 684         case TRUNCATE_DIRECTORY:
 685         case RECURSIVE_REMOVE_PATH:
 686                 if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false)) < 0 &&
 687                     r != -ENOENT) {
 688                         log_error("rm_rf(%s): %s", instance, strerror(-r));
 689                         return r;
 690                 }
 691
 692                 break;
 693         }
 694
 695         return 0;
 696 }
 697
 698 static int remove_item(Item *i) {
 699         int r = 0;
 700
 701         assert(i);
 702
 703         switch (i->type) {
 704
 705         case CREATE_FILE:
 706         case TRUNCATE_FILE:
 707         case CREATE_DIRECTORY:
 708         case CREATE_FIFO:
 709         case IGNORE_PATH:
 710         case RECURSIVE_RELABEL_PATH:
 711                 break;
 712
 713         case REMOVE_PATH:
 714         case TRUNCATE_DIRECTORY:
 715         case RECURSIVE_REMOVE_PATH:
 716                 r = glob_item(i, remove_item_instance);
 717                 break;
 718         }
 719
 720         return r;
 721 }
 722
 723 static int process_item(Item *i) {
 724         int r, q, p;
 725
 726         assert(i);
 727
 728         r = arg_create ? create_item(i) : 0;
 729         q = arg_remove ? remove_item(i) : 0;
 730         p = arg_clean ? clean_item(i) : 0;
 731
 732         if (r < 0)
 733                 return r;
 734
 735         if (q < 0)
 736                 return q;
 737
 738         return p;
 739 }
 740
 741 static void item_free(Item *i) {
 742         assert(i);
 743
 744         free(i->path);
 745         free(i);
 746 }
 747
 748 static bool item_equal(Item *a, Item *b) {
 749         assert(a);
 750         assert(b);
 751
 752         if (!streq_ptr(a->path, b->path))
 753                 return false;
 754
 755         if (a->type != b->type)
 756                 return false;
 757
 758         if (a->uid_set != b->uid_set ||
 759             (a->uid_set && a->uid != b->uid))
 760             return false;
 761
 762         if (a->gid_set != b->gid_set ||
 763             (a->gid_set && a->gid != b->gid))
 764             return false;
 765
 766         if (a->mode_set != b->mode_set ||
 767             (a->mode_set && a->mode != b->mode))
 768             return false;
 769
 770         if (a->age_set != b->age_set ||
 771             (a->age_set && a->age != b->age))
 772             return false;
 773
 774         return true;
 775 }
 776
 777 static int parse_line(const char *fname, unsigned line, const char *buffer) {
 778         Item *i, *existing;
 779         char *mode = NULL, *user = NULL, *group = NULL, *age = NULL;
 780         char type;
 781         Hashmap *h;
 782         int r;
 783
 784         assert(fname);
 785         assert(line >= 1);
 786         assert(buffer);
 787
 788         if (!(i = new0(Item, 1))) {
 789                 log_error("Out of memory");
 790                 return -ENOMEM;
 791         }
 792
 793         if (sscanf(buffer,
 794                    "%c "
 795                    "%ms "
 796                    "%ms "
 797                    "%ms "
 798                    "%ms "
 799                    "%ms",
 800                    &type,
 801                    &i->path,
 802                    &mode,
 803                    &user,
 804                    &group,
 805                    &age) < 2) {
 806                 log_error("[%s:%u] Syntax error.", fname, line);
 807                 r = -EIO;
 808                 goto finish;
 809         }
 810
 811         if (type != CREATE_FILE &&
 812             type != TRUNCATE_FILE &&
 813             type != CREATE_DIRECTORY &&
 814             type != TRUNCATE_DIRECTORY &&
 815             type != CREATE_FIFO &&
 816             type != IGNORE_PATH &&
 817             type != REMOVE_PATH &&
 818             type != RECURSIVE_REMOVE_PATH &&
 819             type != RECURSIVE_RELABEL_PATH) {
 820                 log_error("[%s:%u] Unknown file type '%c'.", fname, line, type);
 821                 r = -EBADMSG;
 822                 goto finish;
 823         }
 824         i->type = type;
 825
 826         if (!path_is_absolute(i->path)) {
 827                 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path);
 828                 r = -EBADMSG;
 829                 goto finish;
 830         }
 831
 832         path_kill_slashes(i->path);
 833
 834         if (arg_prefix && !path_startswith(i->path, arg_prefix)) {
 835                 r = 0;
 836                 goto finish;
 837         }
 838
 839         if (user && !streq(user, "-")) {
 840                 const char *u = user;
 841
 842                 r = get_user_creds(&u, &i->uid, NULL, NULL);
 843                 if (r < 0) {
 844                         log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
 845                         goto finish;
 846                 }
 847
 848                 i->uid_set = true;
 849         }
 850
 851         if (group && !streq(group, "-")) {
 852                 const char *g = group;
 853
 854                 r = get_group_creds(&g, &i->gid);
 855                 if (r < 0) {
 856                         log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
 857                         goto finish;
 858                 }
 859
 860                 i->gid_set = true;
 861         }
 862
 863         if (mode && !streq(mode, "-")) {
 864                 unsigned m;
 865
 866                 if (sscanf(mode, "%o", &m) != 1) {
 867                         log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
 868                         r = -ENOENT;
 869                         goto finish;
 870                 }
 871
 872                 i->mode = m;
 873                 i->mode_set = true;
 874         } else
 875                 i->mode = i->type == CREATE_DIRECTORY ? 0755 : 0644;
 876
 877         if (age && !streq(age, "-")) {
 878                 if (parse_usec(age, &i->age) < 0) {
 879                         log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
 880                         r = -EBADMSG;
 881                         goto finish;
 882                 }
 883
 884                 i->age_set = true;
 885         }
 886
 887         h = needs_glob(i->type) ? globs : items;
 888
 889         if ((existing = hashmap_get(h, i->path))) {
 890
 891                 /* Two identical items are fine */
 892                 if (!item_equal(existing, i))
 893                         log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path);
 894
 895                 r = 0;
 896                 goto finish;
 897         }
 898
 899         if ((r = hashmap_put(h, i->path, i)) < 0) {
 900                 log_error("Failed to insert item %s: %s", i->path, strerror(-r));
 901                 goto finish;
 902         }
 903
 904         i = NULL;
 905         r = 0;
 906
 907 finish:
 908         free(user);
 909         free(group);
 910         free(mode);
 911         free(age);
 912
 913         if (i)
 914                 item_free(i);
 915
 916         return r;
 917 }
 918
 919 static int help(void) {
 920
 921         printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
 922                "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
 923                "  -h --help             Show this help\n"
 924                "     --create           Create marked files/directories\n"
 925                "     --clean            Clean up marked directories\n"
 926                "     --remove           Remove marked files/directories\n"
 927                "     --prefix=PATH      Only apply rules that apply to paths with the specified prefix\n",
 928                program_invocation_short_name);
 929
 930         return 0;
 931 }
 932
 933 static int parse_argv(int argc, char *argv[]) {
 934
 935         enum {
 936                 ARG_CREATE,
 937                 ARG_CLEAN,
 938                 ARG_REMOVE,
 939                 ARG_PREFIX
 940         };
 941
 942         static const struct option options[] = {
 943                 { "help",      no_argument,       NULL, 'h'           },
 944                 { "create",    no_argument,       NULL, ARG_CREATE    },
 945                 { "clean",     no_argument,       NULL, ARG_CLEAN     },
 946                 { "remove",    no_argument,       NULL, ARG_REMOVE    },
 947                 { "prefix",    required_argument, NULL, ARG_PREFIX    },
 948                 { NULL,        0,                 NULL, 0             }
 949         };
 950
 951         int c;
 952
 953         assert(argc >= 0);
 954         assert(argv);
 955
 956         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
 957
 958                 switch (c) {
 959
 960                 case 'h':
 961                         help();
 962                         return 0;
 963
 964                 case ARG_CREATE:
 965                         arg_create = true;
 966                         break;
 967
 968                 case ARG_CLEAN:
 969                         arg_clean = true;
 970                         break;
 971
 972                 case ARG_REMOVE:
 973                         arg_remove = true;
 974                         break;
 975
 976                 case ARG_PREFIX:
 977                         arg_prefix = optarg;
 978                         break;
 979
 980                 case '?':
 981                         return -EINVAL;
 982
 983                 default:
 984                         log_error("Unknown option code %c", c);
 985                         return -EINVAL;
 986                 }
 987         }
 988
 989         if (!arg_clean && !arg_create && !arg_remove) {
 990                 log_error("You need to specify at least one of --clean, --create or --remove.");
 991                 return -EINVAL;
 992         }
 993
 994         return 1;
 995 }
 996
 997 static int read_config_file(const char *fn, bool ignore_enoent) {
 998         FILE *f;
 999         unsigned v = 0;
1000         int r = 0;
1001
1002         assert(fn);
1003
1004         if (!(f = fopen(fn, "re"))) {
1005
1006                 if (ignore_enoent && errno == ENOENT)
1007                         return 0;
1008
1009                 log_error("Failed to open %s: %m", fn);
1010                 return -errno;
1011         }
1012
1013         log_debug("apply: %s\n", fn);
1014         for (;;) {
1015                 char line[LINE_MAX], *l;
1016                 int k;
1017
1018                 if (!(fgets(line, sizeof(line), f)))
1019                         break;
1020
1021                 v++;
1022
1023                 l = strstrip(line);
1024                 if (*l == '#' || *l == 0)
1025                         continue;
1026
1027                 if ((k = parse_line(fn, v, l)) < 0)
1028                         if (r == 0)
1029                                 r = k;
1030         }
1031
1032         if (ferror(f)) {
1033                 log_error("Failed to read from file %s: %m", fn);
1034                 if (r == 0)
1035                         r = -EIO;
1036         }
1037
1038         fclose(f);
1039
1040         return r;
1041 }
1042
1043 int main(int argc, char *argv[]) {
1044         int r;
1045         Item *i;
1046         Iterator iterator;
1047
1048         if ((r = parse_argv(argc, argv)) <= 0)
1049                 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1050
1051         log_set_target(LOG_TARGET_AUTO);
1052         log_parse_environment();
1053         log_open();
1054
1055         umask(0022);
1056
1057         label_init();
1058
1059         items = hashmap_new(string_hash_func, string_compare_func);
1060         globs = hashmap_new(string_hash_func, string_compare_func);
1061
1062         if (!items || !globs) {
1063                 log_error("Out of memory");
1064                 r = EXIT_FAILURE;
1065                 goto finish;
1066         }
1067
1068         r = EXIT_SUCCESS;
1069
1070         if (optind < argc) {
1071                 int j;
1072
1073                 for (j = optind; j < argc; j++)
1074                         if (read_config_file(argv[j], false) < 0)
1075                                 r = EXIT_FAILURE;
1076
1077         } else {
1078                 char **files, **f;
1079
1080                 r = conf_files_list(&files, ".conf",
1081                                     "/run/tmpfiles.d",
1082                                     "/etc/tmpfiles.d",
1083                                     "/usr/local/lib/tmpfiles.d",
1084                                     "/usr/lib/tmpfiles.d",
1085                                     NULL);
1086                 if (r < 0) {
1087                         r = EXIT_FAILURE;
1088                         log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r));
1089                         goto finish;
1090                 }
1091
1092                 STRV_FOREACH(f, files) {
1093                         if (read_config_file(*f, true) < 0)
1094                                 r = EXIT_FAILURE;
1095                 }
1096
1097                 strv_free(files);
1098         }
1099
1100         HASHMAP_FOREACH(i, globs, iterator)
1101                 process_item(i);
1102
1103         HASHMAP_FOREACH(i, items, iterator)
1104                 process_item(i);
1105
1106 finish:
1107         while ((i = hashmap_steal_first(items)))
1108                 item_free(i);
1109
1110         while ((i = hashmap_steal_first(globs)))
1111                 item_free(i);
1112
1113         hashmap_free(items);
1114         hashmap_free(globs);
1115
1116         set_free_free(unix_sockets);
1117
1118         label_finish();
1119
1120         return r;
1121 }