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 } ItemType;
  66
  67 typedef struct Item {
  68         ItemType 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(ItemType 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         fclose(f);
 161         return;
 162
 163 fail:
 164         set_free_free(unix_sockets);
 165         unix_sockets = NULL;
 166
 167         if (f)
 168                 fclose(f);
 169 }
 170
 171 static bool unix_socket_alive(const char *fn) {
 172         assert(fn);
 173
 174         load_unix_sockets();
 175
 176         if (unix_sockets)
 177                 return !!set_get(unix_sockets, (char*) fn);
 178
 179         /* We don't know, so assume yes */
 180         return true;
 181 }
 182
 183 static int dir_cleanup(
 184                 const char *p,
 185                 DIR *d,
 186                 const struct stat *ds,
 187                 usec_t cutoff,
 188                 dev_t rootdev,
 189                 bool mountpoint,
 190                 int maxdepth)
 191 {
 192         struct dirent *dent;
 193         struct timespec times[2];
 194         bool deleted = false;
 195         char *sub_path = NULL;
 196         int r = 0;
 197
 198         while ((dent = readdir(d))) {
 199                 struct stat s;
 200                 usec_t age;
 201
 202                 if (streq(dent->d_name, ".") ||
 203                     streq(dent->d_name, ".."))
 204                         continue;
 205
 206                 if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
 207
 208                         if (errno != ENOENT) {
 209                                 log_error("stat(%s/%s) failed: %m", p, dent->d_name);
 210                                 r = -errno;
 211                         }
 212
 213                         continue;
 214                 }
 215
 216                 /* Stay on the same filesystem */
 217                 if (s.st_dev != rootdev)
 218                         continue;
 219
 220                 /* Do not delete read-only files owned by root */
 221                 if (s.st_uid == 0 && !(s.st_mode & S_IWUSR))
 222                         continue;
 223
 224                 free(sub_path);
 225                 sub_path = NULL;
 226
 227                 if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) {
 228                         log_error("Out of memory");
 229                         r = -ENOMEM;
 230                         goto finish;
 231                 }
 232
 233                 /* Is there an item configured for this path? */
 234                 if (hashmap_get(items, sub_path))
 235                         continue;
 236
 237                 if (find_glob(globs, sub_path))
 238                         continue;
 239
 240                 if (S_ISDIR(s.st_mode)) {
 241
 242                         if (mountpoint &&
 243                             streq(dent->d_name, "lost+found") &&
 244                             s.st_uid == 0)
 245                                 continue;
 246
 247                         if (maxdepth <= 0)
 248                                 log_warning("Reached max depth on %s.", sub_path);
 249                         else {
 250                                 DIR *sub_dir;
 251                                 int q;
 252
 253                                 sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW);
 254                                 if (sub_dir == NULL) {
 255                                         if (errno != ENOENT) {
 256                                                 log_error("opendir(%s/%s) failed: %m", p, dent->d_name);
 257                                                 r = -errno;
 258                                         }
 259
 260                                         continue;
 261                                 }
 262
 263                                 q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1);
 264                                 closedir(sub_dir);
 265
 266                                 if (q < 0)
 267                                         r = q;
 268                         }
 269
 270                         /* Ignore ctime, we change it when deleting */
 271                         age = MAX(timespec_load(&s.st_mtim),
 272                                   timespec_load(&s.st_atim));
 273                         if (age >= cutoff)
 274                                 continue;
 275
 276                         log_debug("rmdir '%s'\n", sub_path);
 277
 278                         if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) {
 279                                 if (errno != ENOENT && errno != ENOTEMPTY) {
 280                                         log_error("rmdir(%s): %m", sub_path);
 281                                         r = -errno;
 282                                 }
 283                         }
 284
 285                 } else {
 286                         /* Skip files for which the sticky bit is
 287                          * set. These are semantics we define, and are
 288                          * unknown elsewhere. See XDG_RUNTIME_DIR
 289                          * specification for details. */
 290                         if (s.st_mode & S_ISVTX)
 291                                 continue;
 292
 293                         if (mountpoint && S_ISREG(s.st_mode)) {
 294                                 if (streq(dent->d_name, ".journal") &&
 295                                     s.st_uid == 0)
 296                                         continue;
 297
 298                                 if (streq(dent->d_name, "aquota.user") ||
 299                                     streq(dent->d_name, "aquota.group"))
 300                                         continue;
 301                         }
 302
 303                         /* Ignore sockets that are listed in /proc/net/unix */
 304                         if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path))
 305                                 continue;
 306
 307                         /* Ignore device nodes */
 308                         if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode))
 309                                 continue;
 310
 311                         age = MAX3(timespec_load(&s.st_mtim),
 312                                    timespec_load(&s.st_atim),
 313                                    timespec_load(&s.st_ctim));
 314
 315                         if (age >= cutoff)
 316                                 continue;
 317
 318                         log_debug("unlink '%s'\n", sub_path);
 319
 320                         if (unlinkat(dirfd(d), dent->d_name, 0) < 0) {
 321                                 if (errno != ENOENT) {
 322                                         log_error("unlink(%s): %m", sub_path);
 323                                         r = -errno;
 324                                 }
 325                         }
 326
 327                         deleted = true;
 328                 }
 329         }
 330
 331 finish:
 332         if (deleted) {
 333                 /* Restore original directory timestamps */
 334                 times[0] = ds->st_atim;
 335                 times[1] = ds->st_mtim;
 336
 337                 if (futimens(dirfd(d), times) < 0)
 338                         log_error("utimensat(%s): %m", p);
 339         }
 340
 341         free(sub_path);
 342
 343         return r;
 344 }
 345
 346 static int clean_item(Item *i) {
 347         DIR *d;
 348         struct stat s, ps;
 349         bool mountpoint;
 350         int r;
 351         usec_t cutoff, n;
 352
 353         assert(i);
 354
 355         if (i->type != CREATE_DIRECTORY &&
 356             i->type != TRUNCATE_DIRECTORY &&
 357             i->type != IGNORE_PATH)
 358                 return 0;
 359
 360         if (!i->age_set || i->age <= 0)
 361                 return 0;
 362
 363         n = now(CLOCK_REALTIME);
 364         if (n < i->age)
 365                 return 0;
 366
 367         cutoff = n - i->age;
 368
 369         d = opendir(i->path);
 370         if (!d) {
 371                 if (errno == ENOENT)
 372                         return 0;
 373
 374                 log_error("Failed to open directory %s: %m", i->path);
 375                 return -errno;
 376         }
 377
 378         if (fstat(dirfd(d), &s) < 0) {
 379                 log_error("stat(%s) failed: %m", i->path);
 380                 r = -errno;
 381                 goto finish;
 382         }
 383
 384         if (!S_ISDIR(s.st_mode)) {
 385                 log_error("%s is not a directory.", i->path);
 386                 r = -ENOTDIR;
 387                 goto finish;
 388         }
 389
 390         if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) {
 391                 log_error("stat(%s/..) failed: %m", i->path);
 392                 r = -errno;
 393                 goto finish;
 394         }
 395
 396         mountpoint = s.st_dev != ps.st_dev ||
 397                      (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino);
 398
 399         r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH);
 400
 401 finish:
 402         if (d)
 403                 closedir(d);
 404
 405         return r;
 406 }
 407
 408 static int glob_item(Item *i, int (*action)(Item *, const char *)) {
 409         int r = 0, k;
 410         glob_t g;
 411         char **fn;
 412
 413         zero(g);
 414
 415         errno = 0;
 416         if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) {
 417
 418                 if (k != GLOB_NOMATCH) {
 419                         if (errno != 0)
 420                                 errno = EIO;
 421
 422                         log_error("glob(%s) failed: %m", i->path);
 423                         return -errno;
 424                 }
 425         }
 426
 427         STRV_FOREACH(fn, g.gl_pathv)
 428                 if ((k = action(i, *fn)) < 0)
 429                         r = k;
 430
 431         globfree(&g);
 432         return r;
 433 }
 434
 435 static int item_set_perms(Item *i) {
 436         if (i->mode_set)
 437                 if (chmod(i->path, i->mode) < 0) {
 438                         log_error("chmod(%s) failed: %m", i->path);
 439                         return -errno;
 440                 }
 441
 442         if (i->uid_set || i->gid_set)
 443                 if (chown(i->path,
 444                           i->uid_set ? i->uid : (uid_t) -1,
 445                           i->gid_set ? i->gid : (gid_t) -1) < 0) {
 446
 447                         log_error("chown(%s) failed: %m", i->path);
 448                         return -errno;
 449                 }
 450
 451         return label_fix(i->path, false);
 452 }
 453
 454 static int create_item(Item *i) {
 455         int r;
 456         mode_t u;
 457         struct stat st;
 458
 459         assert(i);
 460
 461         switch (i->type) {
 462
 463         case IGNORE_PATH:
 464         case REMOVE_PATH:
 465         case RECURSIVE_REMOVE_PATH:
 466                 return 0;
 467
 468         case CREATE_FILE:
 469         case TRUNCATE_FILE: {
 470                 int fd;
 471
 472                 u = umask(0);
 473                 fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW|
 474                           (i->type == TRUNCATE_FILE ? O_TRUNC : 0), i->mode);
 475                 umask(u);
 476
 477                 if (fd < 0) {
 478                         log_error("Failed to create file %s: %m", i->path);
 479                         return -errno;
 480                 }
 481
 482                 close_nointr_nofail(fd);
 483
 484                 if (stat(i->path, &st) < 0) {
 485                         log_error("stat(%s) failed: %m", i->path);
 486                         return -errno;
 487                 }
 488
 489                 if (!S_ISREG(st.st_mode)) {
 490                         log_error("%s is not a file.", i->path);
 491                         return -EEXIST;
 492                 }
 493
 494                 r = item_set_perms(i);
 495                 if (r < 0)
 496                         return r;
 497
 498                 break;
 499         }
 500
 501         case TRUNCATE_DIRECTORY:
 502         case CREATE_DIRECTORY:
 503
 504                 u = umask(0);
 505                 mkdir_parents(i->path, 0755);
 506                 r = mkdir(i->path, i->mode);
 507                 umask(u);
 508
 509                 if (r < 0 && errno != EEXIST) {
 510                         log_error("Failed to create directory %s: %m", i->path);
 511                         return -errno;
 512                 }
 513
 514                 if (stat(i->path, &st) < 0) {
 515                         log_error("stat(%s) failed: %m", i->path);
 516                         return -errno;
 517                 }
 518
 519                 if (!S_ISDIR(st.st_mode)) {
 520                         log_error("%s is not a directory.", i->path);
 521                         return -EEXIST;
 522                 }
 523
 524                 r = item_set_perms(i);
 525                 if (r < 0)
 526                         return r;
 527
 528                 break;
 529
 530         case CREATE_FIFO:
 531
 532                 u = umask(0);
 533                 r = mkfifo(i->path, i->mode);
 534                 umask(u);
 535
 536                 if (r < 0 && errno != EEXIST) {
 537                         log_error("Failed to create fifo %s: %m", i->path);
 538                         return -errno;
 539                 }
 540
 541                 if (stat(i->path, &st) < 0) {
 542                         log_error("stat(%s) failed: %m", i->path);
 543                         return -errno;
 544                 }
 545
 546                 if (!S_ISFIFO(st.st_mode)) {
 547                         log_error("%s is not a fifo.", i->path);
 548                         return -EEXIST;
 549                 }
 550
 551                 r = item_set_perms(i);
 552                 if (r < 0)
 553                         return r;
 554
 555                 break;
 556         }
 557
 558         log_debug("%s created successfully.", i->path);
 559
 560         return 0;
 561 }
 562
 563 static int remove_item_instance(Item *i, const char *instance) {
 564         int r;
 565
 566         assert(i);
 567
 568         switch (i->type) {
 569
 570         case CREATE_FILE:
 571         case TRUNCATE_FILE:
 572         case CREATE_DIRECTORY:
 573         case CREATE_FIFO:
 574         case IGNORE_PATH:
 575                 break;
 576
 577         case REMOVE_PATH:
 578                 if (remove(instance) < 0 && errno != ENOENT) {
 579                         log_error("remove(%s): %m", instance);
 580                         return -errno;
 581                 }
 582
 583                 break;
 584
 585         case TRUNCATE_DIRECTORY:
 586         case RECURSIVE_REMOVE_PATH:
 587                 if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false)) < 0 &&
 588                     r != -ENOENT) {
 589                         log_error("rm_rf(%s): %s", instance, strerror(-r));
 590                         return r;
 591                 }
 592
 593                 break;
 594         }
 595
 596         return 0;
 597 }
 598
 599 static int remove_item(Item *i) {
 600         int r = 0;
 601
 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                 r = glob_item(i, remove_item_instance);
 617                 break;
 618         }
 619
 620         return r;
 621 }
 622
 623 static int process_item(Item *i) {
 624         int r, q, p;
 625
 626         assert(i);
 627
 628         r = arg_create ? create_item(i) : 0;
 629         q = arg_remove ? remove_item(i) : 0;
 630         p = arg_clean ? clean_item(i) : 0;
 631
 632         if (r < 0)
 633                 return r;
 634
 635         if (q < 0)
 636                 return q;
 637
 638         return p;
 639 }
 640
 641 static void item_free(Item *i) {
 642         assert(i);
 643
 644         free(i->path);
 645         free(i);
 646 }
 647
 648 static bool item_equal(Item *a, Item *b) {
 649         assert(a);
 650         assert(b);
 651
 652         if (!streq_ptr(a->path, b->path))
 653                 return false;
 654
 655         if (a->type != b->type)
 656                 return false;
 657
 658         if (a->uid_set != b->uid_set ||
 659             (a->uid_set && a->uid != b->uid))
 660             return false;
 661
 662         if (a->gid_set != b->gid_set ||
 663             (a->gid_set && a->gid != b->gid))
 664             return false;
 665
 666         if (a->mode_set != b->mode_set ||
 667             (a->mode_set && a->mode != b->mode))
 668             return false;
 669
 670         if (a->age_set != b->age_set ||
 671             (a->age_set && a->age != b->age))
 672             return false;
 673
 674         return true;
 675 }
 676
 677 static int parse_line(const char *fname, unsigned line, const char *buffer) {
 678         Item *i, *existing;
 679         char *mode = NULL, *user = NULL, *group = NULL, *age = NULL;
 680         char type;
 681         Hashmap *h;
 682         int r;
 683
 684         assert(fname);
 685         assert(line >= 1);
 686         assert(buffer);
 687
 688         if (!(i = new0(Item, 1))) {
 689                 log_error("Out of memory");
 690                 return -ENOMEM;
 691         }
 692
 693         if (sscanf(buffer,
 694                    "%c "
 695                    "%ms "
 696                    "%ms "
 697                    "%ms "
 698                    "%ms "
 699                    "%ms",
 700                    &type,
 701                    &i->path,
 702                    &mode,
 703                    &user,
 704                    &group,
 705                    &age) < 2) {
 706                 log_error("[%s:%u] Syntax error.", fname, line);
 707                 r = -EIO;
 708                 goto finish;
 709         }
 710         i->type = type;
 711
 712         if (i->type != CREATE_FILE &&
 713             i->type != TRUNCATE_FILE &&
 714             i->type != CREATE_DIRECTORY &&
 715             i->type != TRUNCATE_DIRECTORY &&
 716             i->type != CREATE_FIFO &&
 717             i->type != IGNORE_PATH &&
 718             i->type != REMOVE_PATH &&
 719             i->type != RECURSIVE_REMOVE_PATH) {
 720                 log_error("[%s:%u] Unknown file type '%c'.", fname, line, i->type);
 721                 r = -EBADMSG;
 722                 goto finish;
 723         }
 724
 725         if (!path_is_absolute(i->path)) {
 726                 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path);
 727                 r = -EBADMSG;
 728                 goto finish;
 729         }
 730
 731         path_kill_slashes(i->path);
 732
 733         if (arg_prefix && !path_startswith(i->path, arg_prefix)) {
 734                 r = 0;
 735                 goto finish;
 736         }
 737
 738         if (user && !streq(user, "-")) {
 739                 const char *u = user;
 740
 741                 r = get_user_creds(&u, &i->uid, NULL, NULL);
 742                 if (r < 0) {
 743                         log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
 744                         goto finish;
 745                 }
 746
 747                 i->uid_set = true;
 748         }
 749
 750         if (group && !streq(group, "-")) {
 751                 const char *g = group;
 752
 753                 r = get_group_creds(&g, &i->gid);
 754                 if (r < 0) {
 755                         log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
 756                         goto finish;
 757                 }
 758
 759                 i->gid_set = true;
 760         }
 761
 762         if (mode && !streq(mode, "-")) {
 763                 unsigned m;
 764
 765                 if (sscanf(mode, "%o", &m) != 1) {
 766                         log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
 767                         r = -ENOENT;
 768                         goto finish;
 769                 }
 770
 771                 i->mode = m;
 772                 i->mode_set = true;
 773         } else
 774                 i->mode = i->type == CREATE_DIRECTORY ? 0755 : 0644;
 775
 776         if (age && !streq(age, "-")) {
 777                 if (parse_usec(age, &i->age) < 0) {
 778                         log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
 779                         r = -EBADMSG;
 780                         goto finish;
 781                 }
 782
 783                 i->age_set = true;
 784         }
 785
 786         h = needs_glob(i->type) ? globs : items;
 787
 788         if ((existing = hashmap_get(h, i->path))) {
 789
 790                 /* Two identical items are fine */
 791                 if (!item_equal(existing, i))
 792                         log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path);
 793
 794                 r = 0;
 795                 goto finish;
 796         }
 797
 798         if ((r = hashmap_put(h, i->path, i)) < 0) {
 799                 log_error("Failed to insert item %s: %s", i->path, strerror(-r));
 800                 goto finish;
 801         }
 802
 803         i = NULL;
 804         r = 0;
 805
 806 finish:
 807         free(user);
 808         free(group);
 809         free(mode);
 810         free(age);
 811
 812         if (i)
 813                 item_free(i);
 814
 815         return r;
 816 }
 817
 818 static int help(void) {
 819
 820         printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
 821                "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
 822                "  -h --help             Show this help\n"
 823                "     --create           Create marked files/directories\n"
 824                "     --clean            Clean up marked directories\n"
 825                "     --remove           Remove marked files/directories\n"
 826                "     --prefix=PATH      Only apply rules that apply to paths with the specified prefix\n",
 827                program_invocation_short_name);
 828
 829         return 0;
 830 }
 831
 832 static int parse_argv(int argc, char *argv[]) {
 833
 834         enum {
 835                 ARG_CREATE,
 836                 ARG_CLEAN,
 837                 ARG_REMOVE,
 838                 ARG_PREFIX
 839         };
 840
 841         static const struct option options[] = {
 842                 { "help",      no_argument,       NULL, 'h'           },
 843                 { "create",    no_argument,       NULL, ARG_CREATE    },
 844                 { "clean",     no_argument,       NULL, ARG_CLEAN     },
 845                 { "remove",    no_argument,       NULL, ARG_REMOVE    },
 846                 { "prefix",    required_argument, NULL, ARG_PREFIX    },
 847                 { NULL,        0,                 NULL, 0             }
 848         };
 849
 850         int c;
 851
 852         assert(argc >= 0);
 853         assert(argv);
 854
 855         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
 856
 857                 switch (c) {
 858
 859                 case 'h':
 860                         help();
 861                         return 0;
 862
 863                 case ARG_CREATE:
 864                         arg_create = true;
 865                         break;
 866
 867                 case ARG_CLEAN:
 868                         arg_clean = true;
 869                         break;
 870
 871                 case ARG_REMOVE:
 872                         arg_remove = true;
 873                         break;
 874
 875                 case ARG_PREFIX:
 876                         arg_prefix = optarg;
 877                         break;
 878
 879                 case '?':
 880                         return -EINVAL;
 881
 882                 default:
 883                         log_error("Unknown option code %c", c);
 884                         return -EINVAL;
 885                 }
 886         }
 887
 888         if (!arg_clean && !arg_create && !arg_remove) {
 889                 log_error("You need to specify at least one of --clean, --create or --remove.");
 890                 return -EINVAL;
 891         }
 892
 893         return 1;
 894 }
 895
 896 static int read_config_file(const char *fn, bool ignore_enoent) {
 897         FILE *f;
 898         unsigned v = 0;
 899         int r = 0;
 900
 901         assert(fn);
 902
 903         if (!(f = fopen(fn, "re"))) {
 904
 905                 if (ignore_enoent && errno == ENOENT)
 906                         return 0;
 907
 908                 log_error("Failed to open %s: %m", fn);
 909                 return -errno;
 910         }
 911
 912         log_debug("apply: %s\n", fn);
 913         for (;;) {
 914                 char line[LINE_MAX], *l;
 915                 int k;
 916
 917                 if (!(fgets(line, sizeof(line), f)))
 918                         break;
 919
 920                 v++;
 921
 922                 l = strstrip(line);
 923                 if (*l == '#' || *l == 0)
 924                         continue;
 925
 926                 if ((k = parse_line(fn, v, l)) < 0)
 927                         if (r == 0)
 928                                 r = k;
 929         }
 930
 931         if (ferror(f)) {
 932                 log_error("Failed to read from file %s: %m", fn);
 933                 if (r == 0)
 934                         r = -EIO;
 935         }
 936
 937         fclose(f);
 938
 939         return r;
 940 }
 941
 942 int main(int argc, char *argv[]) {
 943         int r;
 944         Item *i;
 945         Iterator iterator;
 946
 947         if ((r = parse_argv(argc, argv)) <= 0)
 948                 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 949
 950         log_set_target(LOG_TARGET_AUTO);
 951         log_parse_environment();
 952         log_open();
 953
 954         umask(0022);
 955
 956         label_init();
 957
 958         items = hashmap_new(string_hash_func, string_compare_func);
 959         globs = hashmap_new(string_hash_func, string_compare_func);
 960
 961         if (!items || !globs) {
 962                 log_error("Out of memory");
 963                 r = EXIT_FAILURE;
 964                 goto finish;
 965         }
 966
 967         r = EXIT_SUCCESS;
 968
 969         if (optind < argc) {
 970                 int j;
 971
 972                 for (j = optind; j < argc; j++)
 973                         if (read_config_file(argv[j], false) < 0)
 974                                 r = EXIT_FAILURE;
 975
 976         } else {
 977                 char **files, **f;
 978
 979                 r = conf_files_list(&files, ".conf",
 980                                     "/run/tmpfiles.d",
 981                                     "/etc/tmpfiles.d",
 982                                     "/usr/local/lib/tmpfiles.d",
 983                                     "/usr/lib/tmpfiles.d",
 984                                     NULL);
 985                 if (r < 0) {
 986                         r = EXIT_FAILURE;
 987                         log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r));
 988                         goto finish;
 989                 }
 990
 991                 STRV_FOREACH(f, files) {
 992                         if (read_config_file(*f, true) < 0)
 993                                 r = EXIT_FAILURE;
 994                 }
 995
 996                 strv_free(files);
 997         }
 998
 999         HASHMAP_FOREACH(i, globs, iterator)
1000                 process_item(i);
1001
1002         HASHMAP_FOREACH(i, items, iterator)
1003                 process_item(i);
1004
1005 finish:
1006         while ((i = hashmap_steal_first(items)))
1007                 item_free(i);
1008
1009         while ((i = hashmap_steal_first(globs)))
1010                 item_free(i);
1011
1012         hashmap_free(items);
1013         hashmap_free(globs);
1014
1015         set_free_free(unix_sockets);
1016
1017         label_finish();
1018
1019         return r;
1020 }