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