src/tmpfiles.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering, Kay Sievers
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <unistd.h>
  23 #include <fcntl.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 #include <sys/stat.h>
  27 #include <limits.h>
  28 #include <dirent.h>
  29 #include <grp.h>
  30 #include <pwd.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <stddef.h>
  34 #include <getopt.h>
  35 #include <stdbool.h>
  36 #include <time.h>
  37 #include <sys/types.h>
  38 #include <sys/param.h>
  39 #include <glob.h>
  40 #include <fnmatch.h>
  41
  42 #include "log.h"
  43 #include "util.h"
  44 #include "strv.h"
  45 #include "label.h"
  46 #include "set.h"
  47
  48 /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
  49  * them in the file system. This is intended to be used to create
  50  * properly owned directories beneath /tmp, /var/tmp, /run, which are
  51  * volatile and hence need to be recreated on bootup. */
  52
  53 enum {
  54         /* These ones take file names */
  55         CREATE_FILE = 'f',
  56         TRUNCATE_FILE = 'F',
  57         CREATE_DIRECTORY = 'd',
  58         TRUNCATE_DIRECTORY = 'D',
  59
  60         /* These ones take globs */
  61         IGNORE_PATH = 'x',
  62         REMOVE_PATH = 'r',
  63         RECURSIVE_REMOVE_PATH = 'R'
  64 };
  65
  66 typedef struct Item {
  67         char type;
  68
  69         char *path;
  70         uid_t uid;
  71         gid_t gid;
  72         mode_t mode;
  73         usec_t age;
  74
  75         bool uid_set:1;
  76         bool gid_set:1;
  77         bool mode_set:1;
  78         bool age_set:1;
  79 } Item;
  80
  81 static Hashmap *items = NULL, *globs = NULL;
  82 static Set *unix_sockets = NULL;
  83
  84 static bool arg_create = false;
  85 static bool arg_clean = false;
  86 static bool arg_remove = false;
  87
  88 static const char *arg_prefix = NULL;
  89
  90 #define MAX_DEPTH 256
  91
  92 static bool needs_glob(int t) {
  93         return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH;
  94 }
  95
  96 static struct Item* find_glob(Hashmap *h, const char *match) {
  97         Item *j;
  98         Iterator i;
  99
 100         HASHMAP_FOREACH(j, h, i)
 101                 if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
 102                         return j;
 103
 104         return NULL;
 105 }
 106
 107 static void load_unix_sockets(void) {
 108         FILE *f = NULL;
 109         char line[LINE_MAX];
 110
 111         if (unix_sockets)
 112                 return;
 113
 114         /* We maintain a cache of the sockets we found in
 115          * /proc/net/unix to speed things up a little. */
 116
 117         if (!(unix_sockets = set_new(string_hash_func, string_compare_func)))
 118                 return;
 119
 120         if (!(f = fopen("/proc/net/unix", "re")))
 121                 return;
 122
 123         if (!(fgets(line, sizeof(line), f)))
 124                 goto fail;
 125
 126         for (;;) {
 127                 char *p, *s;
 128                 int k;
 129
 130                 if (!(fgets(line, sizeof(line), f)))
 131                         break;
 132
 133                 truncate_nl(line);
 134
 135                 if (strlen(line) < 53)
 136                         continue;
 137
 138                 p = line + 53;
 139                 p += strspn(p, WHITESPACE);
 140                 p += strcspn(p, WHITESPACE);
 141                 p += strspn(p, WHITESPACE);
 142
 143                 if (*p != '/')
 144                         continue;
 145
 146                 if (!(s = strdup(p)))
 147                         goto fail;
 148
 149                 path_kill_slashes(s);
 150
 151                 if ((k = set_put(unix_sockets, s)) < 0) {
 152                         free(s);
 153
 154                         if (k != -EEXIST)
 155                                 goto fail;
 156                 }
 157         }
 158
 159         return;
 160
 161 fail:
 162         set_free_free(unix_sockets);
 163         unix_sockets = NULL;
 164
 165         if (f)
 166                 fclose(f);
 167 }
 168
 169 static bool unix_socket_alive(const char *fn) {
 170         assert(fn);
 171
 172         load_unix_sockets();
 173
 174         if (unix_sockets)
 175                 return !!set_get(unix_sockets, (char*) fn);
 176
 177         /* We don't know, so assume yes */
 178         return true;
 179 }
 180
 181 static int dir_cleanup(
 182                 const char *p,
 183                 DIR *d,
 184                 const struct stat *ds,
 185                 usec_t cutoff,
 186                 dev_t rootdev,
 187                 bool mountpoint,
 188                 int maxdepth)
 189 {
 190         struct dirent *dent;
 191         struct timespec times[2];
 192         bool deleted = false;
 193         char *sub_path = NULL;
 194         int r = 0;
 195
 196         while ((dent = readdir(d))) {
 197                 struct stat s;
 198                 usec_t age;
 199
 200                 if (streq(dent->d_name, ".") ||
 201                     streq(dent->d_name, ".."))
 202                         continue;
 203
 204                 if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
 205
 206                         if (errno != ENOENT) {
 207                                 log_error("stat(%s/%s) failed: %m", p, dent->d_name);
 208                                 r = -errno;
 209                         }
 210
 211                         continue;
 212                 }
 213
 214                 /* Stay on the same filesystem */
 215                 if (s.st_dev != rootdev)
 216                         continue;
 217
 218                 /* Do not delete read-only files owned by root */
 219                 if (s.st_uid == 0 && !(s.st_mode & S_IWUSR))
 220                         continue;
 221
 222                 free(sub_path);
 223                 sub_path = NULL;
 224
 225                 if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) {
 226                         log_error("Out of memory");
 227                         r = -ENOMEM;
 228                         goto finish;
 229                 }
 230
 231                 /* Is there an item configured for this path? */
 232                 if (hashmap_get(items, sub_path))
 233                         continue;
 234
 235                 if (find_glob(globs, sub_path))
 236                         continue;
 237
 238                 if (S_ISDIR(s.st_mode)) {
 239
 240                         if (mountpoint &&
 241                             streq(dent->d_name, "lost+found") &&
 242                             s.st_uid == 0)
 243                                 continue;
 244
 245                         if (maxdepth <= 0)
 246                                 log_warning("Reached max depth on %s.", sub_path);
 247                         else {
 248                                 DIR *sub_dir;
 249                                 int q;
 250
 251                                 sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW);
 252                                 if (sub_dir == NULL) {
 253                                         if (errno != ENOENT) {
 254                                                 log_error("opendir(%s/%s) failed: %m", p, dent->d_name);
 255                                                 r = -errno;
 256                                         }
 257
 258                                         continue;
 259                                 }
 260
 261                                 q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1);
 262                                 closedir(sub_dir);
 263
 264                                 if (q < 0)
 265                                         r = q;
 266                         }
 267
 268                         /* Ignore ctime, we change it when deleting */
 269                         age = MAX(timespec_load(&s.st_mtim),
 270                                   timespec_load(&s.st_atim));
 271                         if (age >= cutoff)
 272                                 continue;
 273
 274                         log_debug("rmdir '%s'\n", sub_path);
 275
 276                         if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) {
 277                                 if (errno != ENOENT && errno != ENOTEMPTY) {
 278                                         log_error("rmdir(%s): %m", sub_path);
 279                                         r = -errno;
 280                                 }
 281                         }
 282
 283                 } else {
 284                         /* Skip files for which the sticky bit is
 285                          * set. These are semantics we define, and are
 286                          * unknown elsewhere. See XDG_RUNTIME_DIR
 287                          * specification for details. */
 288                         if (s.st_mode & S_ISVTX)
 289                                 continue;
 290
 291                         if (mountpoint && S_ISREG(s.st_mode)) {
 292                                 if (streq(dent->d_name, ".journal") &&
 293                                     s.st_uid == 0)
 294                                         continue;
 295
 296                                 if (streq(dent->d_name, "aquota.user") ||
 297                                     streq(dent->d_name, "aquota.group"))
 298                                         continue;
 299                         }
 300
 301                         /* Ignore sockets that are listed in /proc/net/unix */
 302                         if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path))
 303                                 continue;
 304
 305                         /* Ignore device nodes */
 306                         if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode))
 307                                 continue;
 308
 309                         age = MAX3(timespec_load(&s.st_mtim),
 310                                    timespec_load(&s.st_atim),
 311                                    timespec_load(&s.st_ctim));
 312
 313                         if (age >= cutoff)
 314                                 continue;
 315
 316                         log_debug("unlink '%s'\n", sub_path);
 317
 318                         if (unlinkat(dirfd(d), dent->d_name, 0) < 0) {
 319                                 if (errno != ENOENT) {
 320                                         log_error("unlink(%s): %m", sub_path);
 321                                         r = -errno;
 322                                 }
 323                         }
 324
 325                         deleted = true;
 326                 }
 327         }
 328
 329 finish:
 330         if (deleted) {
 331                 /* Restore original directory timestamps */
 332                 times[0] = ds->st_atim;
 333                 times[1] = ds->st_mtim;
 334
 335                 if (futimens(dirfd(d), times) < 0)
 336                         log_error("utimensat(%s): %m", p);
 337         }
 338
 339         free(sub_path);
 340
 341         return r;
 342 }
 343
 344 static int clean_item(Item *i) {
 345         DIR *d;
 346         struct stat s, ps;
 347         bool mountpoint;
 348         int r;
 349         usec_t cutoff, n;
 350
 351         assert(i);
 352
 353         if (i->type != CREATE_DIRECTORY &&
 354             i->type != TRUNCATE_DIRECTORY &&
 355             i->type != IGNORE_PATH)
 356                 return 0;
 357
 358         if (!i->age_set || i->age <= 0)
 359                 return 0;
 360
 361         n = now(CLOCK_REALTIME);
 362         if (n < i->age)
 363                 return 0;
 364
 365         cutoff = n - i->age;
 366
 367         d = opendir(i->path);
 368         if (!d) {
 369                 if (errno == ENOENT)
 370                         return 0;
 371
 372                 log_error("Failed to open directory %s: %m", i->path);
 373                 return -errno;
 374         }
 375
 376         if (fstat(dirfd(d), &s) < 0) {
 377                 log_error("stat(%s) failed: %m", i->path);
 378                 r = -errno;
 379                 goto finish;
 380         }
 381
 382         if (!S_ISDIR(s.st_mode)) {
 383                 log_error("%s is not a directory.", i->path);
 384                 r = -ENOTDIR;
 385                 goto finish;
 386         }
 387
 388         if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) {
 389                 log_error("stat(%s/..) failed: %m", i->path);
 390                 r = -errno;
 391                 goto finish;
 392         }
 393
 394         mountpoint = s.st_dev != ps.st_dev ||
 395                      (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino);
 396
 397         r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH);
 398
 399 finish:
 400         if (d)
 401                 closedir(d);
 402
 403         return r;
 404 }
 405
 406 static int create_item(Item *i) {
 407         int fd = -1, r;
 408         mode_t u;
 409         struct stat st;
 410
 411         assert(i);
 412
 413         switch (i->type) {
 414
 415         case IGNORE_PATH:
 416         case REMOVE_PATH:
 417         case RECURSIVE_REMOVE_PATH:
 418                 return 0;
 419
 420         case CREATE_FILE:
 421         case TRUNCATE_FILE:
 422
 423                 u = umask(0);
 424                 fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW|
 425                           (i->type == TRUNCATE_FILE ? O_TRUNC : 0), i->mode);
 426                 umask(u);
 427
 428                 if (fd < 0) {
 429                         log_error("Failed to create file %s: %m", i->path);
 430                         r = -errno;
 431                         goto finish;
 432                 }
 433
 434                 if (fstat(fd, &st) < 0) {
 435                         log_error("stat(%s) failed: %m", i->path);
 436                         r = -errno;
 437                         goto finish;
 438                 }
 439
 440                 if (!S_ISREG(st.st_mode)) {
 441                         log_error("%s is not a file.", i->path);
 442                         r = -EEXIST;
 443                         goto finish;
 444                 }
 445
 446                 if (i->mode_set)
 447                         if (fchmod(fd, i->mode) < 0) {
 448                                 log_error("chmod(%s) failed: %m", i->path);
 449                                 r = -errno;
 450                                 goto finish;
 451                         }
 452
 453                 if (i->uid_set || i->gid_set)
 454                         if (fchown(fd,
 455                                    i->uid_set ? i->uid : (uid_t) -1,
 456                                    i->gid_set ? i->gid : (gid_t) -1) < 0) {
 457                                 log_error("chown(%s) failed: %m", i->path);
 458                                 r = -errno;
 459                                 goto finish;
 460                         }
 461
 462                 break;
 463
 464         case TRUNCATE_DIRECTORY:
 465         case CREATE_DIRECTORY:
 466
 467                 u = umask(0);
 468                 mkdir_parents(i->path, 0755);
 469                 r = mkdir(i->path, i->mode);
 470                 umask(u);
 471
 472                 if (r < 0 && errno != EEXIST) {
 473                         log_error("Failed to create directory %s: %m", i->path);
 474                         r = -errno;
 475                         goto finish;
 476                 }
 477
 478                 if (stat(i->path, &st) < 0) {
 479                         log_error("stat(%s) failed: %m", i->path);
 480                         r = -errno;
 481                         goto finish;
 482                 }
 483
 484                 if (!S_ISDIR(st.st_mode)) {
 485                         log_error("%s is not a directory.", i->path);
 486                         r = -EEXIST;
 487                         goto finish;
 488                 }
 489
 490                 if (i->mode_set)
 491                         if (chmod(i->path, i->mode) < 0) {
 492                                 log_error("chmod(%s) failed: %m", i->path);
 493                                 r = -errno;
 494                                 goto finish;
 495                         }
 496
 497                 if (i->uid_set || i->gid_set)
 498                         if (chown(i->path,
 499                                   i->uid_set ? i->uid : (uid_t) -1,
 500                                   i->gid_set ? i->gid : (gid_t) -1) < 0) {
 501
 502                                 log_error("chown(%s) failed: %m", i->path);
 503                                 r = -errno;
 504                                 goto finish;
 505                         }
 506
 507                 break;
 508         }
 509
 510         if ((r = label_fix(i->path, false)) < 0)
 511                 goto finish;
 512
 513         log_debug("%s created successfully.", i->path);
 514
 515 finish:
 516         if (fd >= 0)
 517                 close_nointr_nofail(fd);
 518
 519         return r;
 520 }
 521
 522 static int remove_item(Item *i, const char *instance) {
 523         int r;
 524
 525         assert(i);
 526
 527         switch (i->type) {
 528
 529         case CREATE_FILE:
 530         case TRUNCATE_FILE:
 531         case CREATE_DIRECTORY:
 532         case IGNORE_PATH:
 533                 break;
 534
 535         case REMOVE_PATH:
 536                 if (remove(instance) < 0 && errno != ENOENT) {
 537                         log_error("remove(%s): %m", instance);
 538                         return -errno;
 539                 }
 540
 541                 break;
 542
 543         case TRUNCATE_DIRECTORY:
 544         case RECURSIVE_REMOVE_PATH:
 545                 if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH)) < 0 &&
 546                     r != -ENOENT) {
 547                         log_error("rm_rf(%s): %s", instance, strerror(-r));
 548                         return r;
 549                 }
 550
 551                 break;
 552         }
 553
 554         return 0;
 555 }
 556
 557 static int remove_item_glob(Item *i) {
 558         assert(i);
 559
 560         switch (i->type) {
 561
 562         case CREATE_FILE:
 563         case TRUNCATE_FILE:
 564         case CREATE_DIRECTORY:
 565         case IGNORE_PATH:
 566                 break;
 567
 568         case REMOVE_PATH:
 569         case TRUNCATE_DIRECTORY:
 570         case RECURSIVE_REMOVE_PATH: {
 571                 int r = 0, k;
 572                 glob_t g;
 573                 char **fn;
 574
 575                 zero(g);
 576
 577                 errno = 0;
 578                 if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) {
 579
 580                         if (k != GLOB_NOMATCH) {
 581                                 if (errno != 0)
 582                                         errno = EIO;
 583
 584                                 log_error("glob(%s) failed: %m", i->path);
 585                                 return -errno;
 586                         }
 587                 }
 588
 589                 STRV_FOREACH(fn, g.gl_pathv)
 590                         if ((k = remove_item(i, *fn)) < 0)
 591                                 r = k;
 592
 593                 globfree(&g);
 594                 return r;
 595         }
 596         }
 597
 598         return 0;
 599 }
 600
 601 static int process_item(Item *i) {
 602         int r, q, p;
 603
 604         assert(i);
 605
 606         r = arg_create ? create_item(i) : 0;
 607         q = arg_remove ? remove_item_glob(i) : 0;
 608         p = arg_clean ? clean_item(i) : 0;
 609
 610         if (r < 0)
 611                 return r;
 612
 613         if (q < 0)
 614                 return q;
 615
 616         return p;
 617 }
 618
 619 static void item_free(Item *i) {
 620         assert(i);
 621
 622         free(i->path);
 623         free(i);
 624 }
 625
 626 static bool item_equal(Item *a, Item *b) {
 627         assert(a);
 628         assert(b);
 629
 630         if (!streq_ptr(a->path, b->path))
 631                 return false;
 632
 633         if (a->type != b->type)
 634                 return false;
 635
 636         if (a->uid_set != b->uid_set ||
 637             (a->uid_set && a->uid != b->uid))
 638             return false;
 639
 640         if (a->gid_set != b->gid_set ||
 641             (a->gid_set && a->gid != b->gid))
 642             return false;
 643
 644         if (a->mode_set != b->mode_set ||
 645             (a->mode_set && a->mode != b->mode))
 646             return false;
 647
 648         if (a->age_set != b->age_set ||
 649             (a->age_set && a->age != b->age))
 650             return false;
 651
 652         return true;
 653 }
 654
 655 static int parse_line(const char *fname, unsigned line, const char *buffer) {
 656         Item *i, *existing;
 657         char *mode = NULL, *user = NULL, *group = NULL, *age = NULL;
 658         Hashmap *h;
 659         int r;
 660
 661         assert(fname);
 662         assert(line >= 1);
 663         assert(buffer);
 664
 665         if (!(i = new0(Item, 1))) {
 666                 log_error("Out of memory");
 667                 return -ENOMEM;
 668         }
 669
 670         if (sscanf(buffer,
 671                    "%c "
 672                    "%ms "
 673                    "%ms "
 674                    "%ms "
 675                    "%ms "
 676                    "%ms",
 677                    &i->type,
 678                    &i->path,
 679                    &mode,
 680                    &user,
 681                    &group,
 682                    &age) < 2) {
 683                 log_error("[%s:%u] Syntax error.", fname, line);
 684                 r = -EIO;
 685                 goto finish;
 686         }
 687
 688         if (i->type != CREATE_FILE &&
 689             i->type != TRUNCATE_FILE &&
 690             i->type != CREATE_DIRECTORY &&
 691             i->type != TRUNCATE_DIRECTORY &&
 692             i->type != IGNORE_PATH &&
 693             i->type != REMOVE_PATH &&
 694             i->type != RECURSIVE_REMOVE_PATH) {
 695                 log_error("[%s:%u] Unknown file type '%c'.", fname, line, i->type);
 696                 r = -EBADMSG;
 697                 goto finish;
 698         }
 699
 700         if (!path_is_absolute(i->path)) {
 701                 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path);
 702                 r = -EBADMSG;
 703                 goto finish;
 704         }
 705
 706         path_kill_slashes(i->path);
 707
 708         if (arg_prefix && !path_startswith(i->path, arg_prefix)) {
 709                 r = 0;
 710                 goto finish;
 711         }
 712
 713         if (user && !streq(user, "-")) {
 714                 unsigned long lu;
 715                 struct passwd *p;
 716
 717                 if (streq(user, "root") || streq(user, "0"))
 718                         i->uid = 0;
 719                 else if (safe_atolu(user, &lu) >= 0)
 720                         i->uid = (uid_t) lu;
 721                 else if ((p = getpwnam(user)))
 722                         i->uid = p->pw_uid;
 723                 else {
 724                         log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
 725                         r = -ENOENT;
 726                         goto finish;
 727                 }
 728
 729                 i->uid_set = true;
 730         }
 731
 732         if (group && !streq(group, "-")) {
 733                 unsigned long lu;
 734                 struct group *g;
 735
 736                 if (streq(group, "root") || streq(group, "0"))
 737                         i->gid = 0;
 738                 else if (safe_atolu(group, &lu) >= 0)
 739                         i->gid = (gid_t) lu;
 740                 else if ((g = getgrnam(group)))
 741                         i->gid = g->gr_gid;
 742                 else {
 743                         log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
 744                         r = -ENOENT;
 745                         goto finish;
 746                 }
 747
 748                 i->gid_set = true;
 749         }
 750
 751         if (mode && !streq(mode, "-")) {
 752                 unsigned m;
 753
 754                 if (sscanf(mode, "%o", &m) != 1) {
 755                         log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
 756                         r = -ENOENT;
 757                         goto finish;
 758                 }
 759
 760                 i->mode = m;
 761                 i->mode_set = true;
 762         } else
 763                 i->mode = i->type == CREATE_DIRECTORY ? 0755 : 0644;
 764
 765         if (age && !streq(age, "-")) {
 766                 if (parse_usec(age, &i->age) < 0) {
 767                         log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
 768                         r = -EBADMSG;
 769                         goto finish;
 770                 }
 771
 772                 i->age_set = true;
 773         }
 774
 775         h = needs_glob(i->type) ? globs : items;
 776
 777         if ((existing = hashmap_get(h, i->path))) {
 778
 779                 /* Two identical items are fine */
 780                 if (!item_equal(existing, i))
 781                         log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path);
 782
 783                 r = 0;
 784                 goto finish;
 785         }
 786
 787         if ((r = hashmap_put(h, i->path, i)) < 0) {
 788                 log_error("Failed to insert item %s: %s", i->path, strerror(-r));
 789                 goto finish;
 790         }
 791
 792         i = NULL;
 793         r = 0;
 794
 795 finish:
 796         free(user);
 797         free(group);
 798         free(mode);
 799         free(age);
 800
 801         if (i)
 802                 item_free(i);
 803
 804         return r;
 805 }
 806
 807 static int help(void) {
 808
 809         printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
 810                "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
 811                "  -h --help             Show this help\n"
 812                "     --create           Create marked files/directories\n"
 813                "     --clean            Clean up marked directories\n"
 814                "     --remove           Remove marked files/directories\n"
 815                "     --prefix=PATH      Only apply rules that apply to paths with the specified prefix\n",
 816                program_invocation_short_name);
 817
 818         return 0;
 819 }
 820
 821 static int parse_argv(int argc, char *argv[]) {
 822
 823         enum {
 824                 ARG_CREATE,
 825                 ARG_CLEAN,
 826                 ARG_REMOVE,
 827                 ARG_PREFIX
 828         };
 829
 830         static const struct option options[] = {
 831                 { "help",      no_argument,       NULL, 'h'           },
 832                 { "create",    no_argument,       NULL, ARG_CREATE    },
 833                 { "clean",     no_argument,       NULL, ARG_CLEAN     },
 834                 { "remove",    no_argument,       NULL, ARG_REMOVE    },
 835                 { "prefix",    required_argument, NULL, ARG_PREFIX    },
 836                 { NULL,        0,                 NULL, 0             }
 837         };
 838
 839         int c;
 840
 841         assert(argc >= 0);
 842         assert(argv);
 843
 844         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
 845
 846                 switch (c) {
 847
 848                 case 'h':
 849                         help();
 850                         return 0;
 851
 852                 case ARG_CREATE:
 853                         arg_create = true;
 854                         break;
 855
 856                 case ARG_CLEAN:
 857                         arg_clean = true;
 858                         break;
 859
 860                 case ARG_REMOVE:
 861                         arg_remove = true;
 862                         break;
 863
 864                 case ARG_PREFIX:
 865                         arg_prefix = optarg;
 866                         break;
 867
 868                 case '?':
 869                         return -EINVAL;
 870
 871                 default:
 872                         log_error("Unknown option code %c", c);
 873                         return -EINVAL;
 874                 }
 875         }
 876
 877         if (!arg_clean && !arg_create && !arg_remove) {
 878                 log_error("You need to specify at least one of --clean, --create or --remove.");
 879                 return -EINVAL;
 880         }
 881
 882         return 1;
 883 }
 884
 885 static int read_config_file(const char *fn, bool ignore_enoent) {
 886         FILE *f;
 887         unsigned v = 0;
 888         int r = 0;
 889
 890         assert(fn);
 891
 892         if (!(f = fopen(fn, "re"))) {
 893
 894                 if (ignore_enoent && errno == ENOENT)
 895                         return 0;
 896
 897                 log_error("Failed to open %s: %m", fn);
 898                 return -errno;
 899         }
 900
 901         log_debug("apply: %s\n", fn);
 902         for (;;) {
 903                 char line[LINE_MAX], *l;
 904                 int k;
 905
 906                 if (!(fgets(line, sizeof(line), f)))
 907                         break;
 908
 909                 v++;
 910
 911                 l = strstrip(line);
 912                 if (*l == '#' || *l == 0)
 913                         continue;
 914
 915                 if ((k = parse_line(fn, v, l)) < 0)
 916                         if (r == 0)
 917                                 r = k;
 918         }
 919
 920         if (ferror(f)) {
 921                 log_error("Failed to read from file %s: %m", fn);
 922                 if (r == 0)
 923                         r = -EIO;
 924         }
 925
 926         fclose(f);
 927
 928         return r;
 929 }
 930
 931 int main(int argc, char *argv[]) {
 932         int r;
 933         Item *i;
 934         Iterator iterator;
 935
 936         if ((r = parse_argv(argc, argv)) <= 0)
 937                 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 938
 939         log_set_target(LOG_TARGET_AUTO);
 940         log_parse_environment();
 941         log_open();
 942
 943         label_init();
 944
 945         items = hashmap_new(string_hash_func, string_compare_func);
 946         globs = hashmap_new(string_hash_func, string_compare_func);
 947
 948         if (!items || !globs) {
 949                 log_error("Out of memory");
 950                 r = EXIT_FAILURE;
 951                 goto finish;
 952         }
 953
 954         r = EXIT_SUCCESS;
 955
 956         if (optind < argc) {
 957                 int j;
 958
 959                 for (j = optind; j < argc; j++)
 960                         if (read_config_file(argv[j], false) < 0)
 961                                 r = EXIT_FAILURE;
 962
 963         } else {
 964                 char **files, **f;
 965
 966                 r = conf_files_list(&files, ".conf",
 967                                     "/run/tmpfiles.d",
 968                                     "/etc/tmpfiles.d",
 969                                     "/usr/local/lib/tmpfiles.d",
 970                                     "/usr/lib/tmpfiles.d",
 971                                     NULL);
 972                 if (r < 0) {
 973                         r = EXIT_FAILURE;
 974                         log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r));
 975                         goto finish;
 976                 }
 977
 978                 STRV_FOREACH(f, files) {
 979                         if (read_config_file(*f, true) < 0)
 980                                 r = EXIT_FAILURE;
 981                 }
 982
 983                 strv_free(files);
 984         }
 985
 986
 987
 988         HASHMAP_FOREACH(i, globs, iterator)
 989                 if (process_item(i) < 0)
 990                         r = EXIT_FAILURE;
 991
 992         HASHMAP_FOREACH(i, items, iterator)
 993                 if (process_item(i) < 0)
 994                         r = EXIT_FAILURE;
 995
 996 finish:
 997         while ((i = hashmap_steal_first(items)))
 998                 item_free(i);
 999
1000         while ((i = hashmap_steal_first(globs)))
1001                 item_free(i);
1002
1003         hashmap_free(items);
1004         hashmap_free(globs);
1005
1006         set_free_free(unix_sockets);
1007
1008         label_finish();
1009
1010         return r;
1011 }