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 recursive_relabel_children(const char *path) {
 410         DIR *d;
 411         int ret = 0;
 412
 413         /* This returns the first error we run into, but nevertheless
 414          * tries to go on */
 415
 416         d = opendir(path);
 417         if (!d)
 418                 return errno == ENOENT ? 0 : -errno;
 419
 420         for (;;) {
 421                 struct dirent buf, *de;
 422                 bool is_dir;
 423                 int r;
 424                 char *entry_path;
 425
 426                 r = readdir_r(d, &buf, &de);
 427                 if (r != 0) {
 428                         if (ret == 0)
 429                                 ret = -r;
 430                         break;
 431                 }
 432
 433                 if (!de)
 434                         break;
 435
 436                 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
 437                         continue;
 438
 439                 if (asprintf(&entry_path, "%s/%s", path, de->d_name) < 0) {
 440                         if (ret == 0)
 441                                 ret = -ENOMEM;
 442                         continue;
 443                 }
 444
 445                 if (de->d_type == DT_UNKNOWN) {
 446                         struct stat st;
 447
 448                         if (lstat(entry_path, &st) < 0) {
 449                                 if (ret == 0 && errno != ENOENT)
 450                                         ret = -errno;
 451                                 free(entry_path);
 452                                 continue;
 453                         }
 454
 455                         is_dir = S_ISDIR(st.st_mode);
 456
 457                 } else
 458                         is_dir = de->d_type == DT_DIR;
 459
 460                 r = label_fix(entry_path, false);
 461                 if (r < 0) {
 462                         if (ret == 0 && r != -ENOENT)
 463                                 ret = r;
 464                         free(entry_path);
 465                         continue;
 466                 }
 467
 468                 if (is_dir) {
 469                         r = recursive_relabel_children(entry_path);
 470                         if (r < 0 && ret == 0)
 471                                 ret = r;
 472                 }
 473
 474                 free(entry_path);
 475         }
 476
 477         closedir(d);
 478
 479         return ret;
 480 }
 481
 482 static int recursive_relabel(Item *i, const char *path) {
 483         int r;
 484         struct stat st;
 485
 486         r = label_fix(path, false);
 487         if (r < 0)
 488                 return r;
 489
 490         if (lstat(path, &st) < 0)
 491                 return -errno;
 492
 493         if (S_ISDIR(st.st_mode))
 494                 r = recursive_relabel_children(path);
 495
 496         return r;
 497 }
 498
 499 static int glob_item(Item *i, int (*action)(Item *, const char *)) {
 500         int r = 0, k;
 501         glob_t g;
 502         char **fn;
 503
 504         zero(g);
 505
 506         errno = 0;
 507         if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) {
 508
 509                 if (k != GLOB_NOMATCH) {
 510                         if (errno != 0)
 511                                 errno = EIO;
 512
 513                         log_error("glob(%s) failed: %m", i->path);
 514                         return -errno;
 515                 }
 516         }
 517
 518         STRV_FOREACH(fn, g.gl_pathv)
 519                 if ((k = action(i, *fn)) < 0)
 520                         r = k;
 521
 522         globfree(&g);
 523         return r;
 524 }
 525
 526 static int item_set_perms(Item *i) {
 527         if (i->mode_set)
 528                 if (chmod(i->path, i->mode) < 0) {
 529                         log_error("chmod(%s) failed: %m", i->path);
 530                         return -errno;
 531                 }
 532
 533         if (i->uid_set || i->gid_set)
 534                 if (chown(i->path,
 535                           i->uid_set ? i->uid : (uid_t) -1,
 536                           i->gid_set ? i->gid : (gid_t) -1) < 0) {
 537
 538                         log_error("chown(%s) failed: %m", i->path);
 539                         return -errno;
 540                 }
 541
 542         return label_fix(i->path, false);
 543 }
 544
 545 static int create_item(Item *i) {
 546         int r;
 547         mode_t u;
 548         struct stat st;
 549
 550         assert(i);
 551
 552         switch (i->type) {
 553
 554         case IGNORE_PATH:
 555         case REMOVE_PATH:
 556         case RECURSIVE_REMOVE_PATH:
 557                 return 0;
 558
 559         case CREATE_FILE:
 560         case TRUNCATE_FILE: {
 561                 int fd;
 562
 563                 u = umask(0);
 564                 fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW|
 565                           (i->type == TRUNCATE_FILE ? O_TRUNC : 0), i->mode);
 566                 umask(u);
 567
 568                 if (fd < 0) {
 569                         log_error("Failed to create file %s: %m", i->path);
 570                         return -errno;
 571                 }
 572
 573                 close_nointr_nofail(fd);
 574
 575                 if (stat(i->path, &st) < 0) {
 576                         log_error("stat(%s) failed: %m", i->path);
 577                         return -errno;
 578                 }
 579
 580                 if (!S_ISREG(st.st_mode)) {
 581                         log_error("%s is not a file.", i->path);
 582                         return -EEXIST;
 583                 }
 584
 585                 r = item_set_perms(i);
 586                 if (r < 0)
 587                         return r;
 588
 589                 break;
 590         }
 591
 592         case TRUNCATE_DIRECTORY:
 593         case CREATE_DIRECTORY:
 594
 595                 u = umask(0);
 596                 mkdir_parents(i->path, 0755);
 597                 r = mkdir(i->path, i->mode);
 598                 umask(u);
 599
 600                 if (r < 0 && errno != EEXIST) {
 601                         log_error("Failed to create directory %s: %m", i->path);
 602                         return -errno;
 603                 }
 604
 605                 if (stat(i->path, &st) < 0) {
 606                         log_error("stat(%s) failed: %m", i->path);
 607                         return -errno;
 608                 }
 609
 610                 if (!S_ISDIR(st.st_mode)) {
 611                         log_error("%s is not a directory.", i->path);
 612                         return -EEXIST;
 613                 }
 614
 615                 r = item_set_perms(i);
 616                 if (r < 0)
 617                         return r;
 618
 619                 break;
 620
 621         case CREATE_FIFO:
 622
 623                 u = umask(0);
 624                 r = mkfifo(i->path, i->mode);
 625                 umask(u);
 626
 627                 if (r < 0 && errno != EEXIST) {
 628                         log_error("Failed to create fifo %s: %m", i->path);
 629                         return -errno;
 630                 }
 631
 632                 if (stat(i->path, &st) < 0) {
 633                         log_error("stat(%s) failed: %m", i->path);
 634                         return -errno;
 635                 }
 636
 637                 if (!S_ISFIFO(st.st_mode)) {
 638                         log_error("%s is not a fifo.", i->path);
 639                         return -EEXIST;
 640                 }
 641
 642                 r = item_set_perms(i);
 643                 if (r < 0)
 644                         return r;
 645
 646                 break;
 647
 648         case RECURSIVE_RELABEL_PATH:
 649
 650                 r = glob_item(i, recursive_relabel);
 651                 if (r < 0)
 652                         return r;
 653         }
 654
 655         log_debug("%s created successfully.", i->path);
 656
 657         return 0;
 658 }
 659
 660 static int remove_item_instance(Item *i, const char *instance) {
 661         int r;
 662
 663         assert(i);
 664
 665         switch (i->type) {
 666
 667         case CREATE_FILE:
 668         case TRUNCATE_FILE:
 669         case CREATE_DIRECTORY:
 670         case CREATE_FIFO:
 671         case IGNORE_PATH:
 672         case RECURSIVE_RELABEL_PATH:
 673                 break;
 674
 675         case REMOVE_PATH:
 676                 if (remove(instance) < 0 && errno != ENOENT) {
 677                         log_error("remove(%s): %m", instance);
 678                         return -errno;
 679                 }
 680
 681                 break;
 682
 683         case TRUNCATE_DIRECTORY:
 684         case RECURSIVE_REMOVE_PATH:
 685                 if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false)) < 0 &&
 686                     r != -ENOENT) {
 687                         log_error("rm_rf(%s): %s", instance, strerror(-r));
 688                         return r;
 689                 }
 690
 691                 break;
 692         }
 693
 694         return 0;
 695 }
 696
 697 static int remove_item(Item *i) {
 698         int r = 0;
 699
 700         assert(i);
 701
 702         switch (i->type) {
 703
 704         case CREATE_FILE:
 705         case TRUNCATE_FILE:
 706         case CREATE_DIRECTORY:
 707         case CREATE_FIFO:
 708         case IGNORE_PATH:
 709         case RECURSIVE_RELABEL_PATH:
 710                 break;
 711
 712         case REMOVE_PATH:
 713         case TRUNCATE_DIRECTORY:
 714         case RECURSIVE_REMOVE_PATH:
 715                 r = glob_item(i, remove_item_instance);
 716                 break;
 717         }
 718
 719         return r;
 720 }
 721
 722 static int process_item(Item *i) {
 723         int r, q, p;
 724
 725         assert(i);
 726
 727         r = arg_create ? create_item(i) : 0;
 728         q = arg_remove ? remove_item(i) : 0;
 729         p = arg_clean ? clean_item(i) : 0;
 730
 731         if (r < 0)
 732                 return r;
 733
 734         if (q < 0)
 735                 return q;
 736
 737         return p;
 738 }
 739
 740 static void item_free(Item *i) {
 741         assert(i);
 742
 743         free(i->path);
 744         free(i);
 745 }
 746
 747 static bool item_equal(Item *a, Item *b) {
 748         assert(a);
 749         assert(b);
 750
 751         if (!streq_ptr(a->path, b->path))
 752                 return false;
 753
 754         if (a->type != b->type)
 755                 return false;
 756
 757         if (a->uid_set != b->uid_set ||
 758             (a->uid_set && a->uid != b->uid))
 759             return false;
 760
 761         if (a->gid_set != b->gid_set ||
 762             (a->gid_set && a->gid != b->gid))
 763             return false;
 764
 765         if (a->mode_set != b->mode_set ||
 766             (a->mode_set && a->mode != b->mode))
 767             return false;
 768
 769         if (a->age_set != b->age_set ||
 770             (a->age_set && a->age != b->age))
 771             return false;
 772
 773         return true;
 774 }
 775
 776 static int parse_line(const char *fname, unsigned line, const char *buffer) {
 777         Item *i, *existing;
 778         char *mode = NULL, *user = NULL, *group = NULL, *age = NULL;
 779         char type;
 780         Hashmap *h;
 781         int r;
 782
 783         assert(fname);
 784         assert(line >= 1);
 785         assert(buffer);
 786
 787         if (!(i = new0(Item, 1))) {
 788                 log_error("Out of memory");
 789                 return -ENOMEM;
 790         }
 791
 792         if (sscanf(buffer,
 793                    "%c "
 794                    "%ms "
 795                    "%ms "
 796                    "%ms "
 797                    "%ms "
 798                    "%ms",
 799                    &type,
 800                    &i->path,
 801                    &mode,
 802                    &user,
 803                    &group,
 804                    &age) < 2) {
 805                 log_error("[%s:%u] Syntax error.", fname, line);
 806                 r = -EIO;
 807                 goto finish;
 808         }
 809
 810         if (type != CREATE_FILE &&
 811             type != TRUNCATE_FILE &&
 812             type != CREATE_DIRECTORY &&
 813             type != TRUNCATE_DIRECTORY &&
 814             type != CREATE_FIFO &&
 815             type != IGNORE_PATH &&
 816             type != REMOVE_PATH &&
 817             type != RECURSIVE_REMOVE_PATH &&
 818             type != RECURSIVE_RELABEL_PATH) {
 819                 log_error("[%s:%u] Unknown file type '%c'.", fname, line, type);
 820                 r = -EBADMSG;
 821                 goto finish;
 822         }
 823         i->type = type;
 824
 825         if (!path_is_absolute(i->path)) {
 826                 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path);
 827                 r = -EBADMSG;
 828                 goto finish;
 829         }
 830
 831         path_kill_slashes(i->path);
 832
 833         if (arg_prefix && !path_startswith(i->path, arg_prefix)) {
 834                 r = 0;
 835                 goto finish;
 836         }
 837
 838         if (user && !streq(user, "-")) {
 839                 const char *u = user;
 840
 841                 r = get_user_creds(&u, &i->uid, NULL, NULL);
 842                 if (r < 0) {
 843                         log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
 844                         goto finish;
 845                 }
 846
 847                 i->uid_set = true;
 848         }
 849
 850         if (group && !streq(group, "-")) {
 851                 const char *g = group;
 852
 853                 r = get_group_creds(&g, &i->gid);
 854                 if (r < 0) {
 855                         log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
 856                         goto finish;
 857                 }
 858
 859                 i->gid_set = true;
 860         }
 861
 862         if (mode && !streq(mode, "-")) {
 863                 unsigned m;
 864
 865                 if (sscanf(mode, "%o", &m) != 1) {
 866                         log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
 867                         r = -ENOENT;
 868                         goto finish;
 869                 }
 870
 871                 i->mode = m;
 872                 i->mode_set = true;
 873         } else
 874                 i->mode = i->type == CREATE_DIRECTORY ? 0755 : 0644;
 875
 876         if (age && !streq(age, "-")) {
 877                 if (parse_usec(age, &i->age) < 0) {
 878                         log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
 879                         r = -EBADMSG;
 880                         goto finish;
 881                 }
 882
 883                 i->age_set = true;
 884         }
 885
 886         h = needs_glob(i->type) ? globs : items;
 887
 888         if ((existing = hashmap_get(h, i->path))) {
 889
 890                 /* Two identical items are fine */
 891                 if (!item_equal(existing, i))
 892                         log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path);
 893
 894                 r = 0;
 895                 goto finish;
 896         }
 897
 898         if ((r = hashmap_put(h, i->path, i)) < 0) {
 899                 log_error("Failed to insert item %s: %s", i->path, strerror(-r));
 900                 goto finish;
 901         }
 902
 903         i = NULL;
 904         r = 0;
 905
 906 finish:
 907         free(user);
 908         free(group);
 909         free(mode);
 910         free(age);
 911
 912         if (i)
 913                 item_free(i);
 914
 915         return r;
 916 }
 917
 918 static int help(void) {
 919
 920         printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
 921                "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
 922                "  -h --help             Show this help\n"
 923                "     --create           Create marked files/directories\n"
 924                "     --clean            Clean up marked directories\n"
 925                "     --remove           Remove marked files/directories\n"
 926                "     --prefix=PATH      Only apply rules that apply to paths with the specified prefix\n",
 927                program_invocation_short_name);
 928
 929         return 0;
 930 }
 931
 932 static int parse_argv(int argc, char *argv[]) {
 933
 934         enum {
 935                 ARG_CREATE,
 936                 ARG_CLEAN,
 937                 ARG_REMOVE,
 938                 ARG_PREFIX
 939         };
 940
 941         static const struct option options[] = {
 942                 { "help",      no_argument,       NULL, 'h'           },
 943                 { "create",    no_argument,       NULL, ARG_CREATE    },
 944                 { "clean",     no_argument,       NULL, ARG_CLEAN     },
 945                 { "remove",    no_argument,       NULL, ARG_REMOVE    },
 946                 { "prefix",    required_argument, NULL, ARG_PREFIX    },
 947                 { NULL,        0,                 NULL, 0             }
 948         };
 949
 950         int c;
 951
 952         assert(argc >= 0);
 953         assert(argv);
 954
 955         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
 956
 957                 switch (c) {
 958
 959                 case 'h':
 960                         help();
 961                         return 0;
 962
 963                 case ARG_CREATE:
 964                         arg_create = true;
 965                         break;
 966
 967                 case ARG_CLEAN:
 968                         arg_clean = true;
 969                         break;
 970
 971                 case ARG_REMOVE:
 972                         arg_remove = true;
 973                         break;
 974
 975                 case ARG_PREFIX:
 976                         arg_prefix = optarg;
 977                         break;
 978
 979                 case '?':
 980                         return -EINVAL;
 981
 982                 default:
 983                         log_error("Unknown option code %c", c);
 984                         return -EINVAL;
 985                 }
 986         }
 987
 988         if (!arg_clean && !arg_create && !arg_remove) {
 989                 log_error("You need to specify at least one of --clean, --create or --remove.");
 990                 return -EINVAL;
 991         }
 992
 993         return 1;
 994 }
 995
 996 static int read_config_file(const char *fn, bool ignore_enoent) {
 997         FILE *f;
 998         unsigned v = 0;
 999         int r = 0;
1000
1001         assert(fn);
1002
1003         if (!(f = fopen(fn, "re"))) {
1004
1005                 if (ignore_enoent && errno == ENOENT)
1006                         return 0;
1007
1008                 log_error("Failed to open %s: %m", fn);
1009                 return -errno;
1010         }
1011
1012         log_debug("apply: %s\n", fn);
1013         for (;;) {
1014                 char line[LINE_MAX], *l;
1015                 int k;
1016
1017                 if (!(fgets(line, sizeof(line), f)))
1018                         break;
1019
1020                 v++;
1021
1022                 l = strstrip(line);
1023                 if (*l == '#' || *l == 0)
1024                         continue;
1025
1026                 if ((k = parse_line(fn, v, l)) < 0)
1027                         if (r == 0)
1028                                 r = k;
1029         }
1030
1031         if (ferror(f)) {
1032                 log_error("Failed to read from file %s: %m", fn);
1033                 if (r == 0)
1034                         r = -EIO;
1035         }
1036
1037         fclose(f);
1038
1039         return r;
1040 }
1041
1042 int main(int argc, char *argv[]) {
1043         int r;
1044         Item *i;
1045         Iterator iterator;
1046
1047         if ((r = parse_argv(argc, argv)) <= 0)
1048                 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1049
1050         log_set_target(LOG_TARGET_AUTO);
1051         log_parse_environment();
1052         log_open();
1053
1054         umask(0022);
1055
1056         label_init();
1057
1058         items = hashmap_new(string_hash_func, string_compare_func);
1059         globs = hashmap_new(string_hash_func, string_compare_func);
1060
1061         if (!items || !globs) {
1062                 log_error("Out of memory");
1063                 r = EXIT_FAILURE;
1064                 goto finish;
1065         }
1066
1067         r = EXIT_SUCCESS;
1068
1069         if (optind < argc) {
1070                 int j;
1071
1072                 for (j = optind; j < argc; j++)
1073                         if (read_config_file(argv[j], false) < 0)
1074                                 r = EXIT_FAILURE;
1075
1076         } else {
1077                 char **files, **f;
1078
1079                 r = conf_files_list(&files, ".conf",
1080                                     "/run/tmpfiles.d",
1081                                     "/etc/tmpfiles.d",
1082                                     "/usr/local/lib/tmpfiles.d",
1083                                     "/usr/lib/tmpfiles.d",
1084                                     NULL);
1085                 if (r < 0) {
1086                         r = EXIT_FAILURE;
1087                         log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r));
1088                         goto finish;
1089                 }
1090
1091                 STRV_FOREACH(f, files) {
1092                         if (read_config_file(*f, true) < 0)
1093                                 r = EXIT_FAILURE;
1094                 }
1095
1096                 strv_free(files);
1097         }
1098
1099         HASHMAP_FOREACH(i, globs, iterator)
1100                 process_item(i);
1101
1102         HASHMAP_FOREACH(i, items, iterator)
1103                 process_item(i);
1104
1105 finish:
1106         while ((i = hashmap_steal_first(items)))
1107                 item_free(i);
1108
1109         while ((i = hashmap_steal_first(globs)))
1110                 item_free(i);
1111
1112         hashmap_free(items);
1113         hashmap_free(globs);
1114
1115         set_free_free(unix_sockets);
1116
1117         label_finish();
1118
1119         return r;
1120 }