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