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         RELABEL_PATH = 'z',
  66         RECURSIVE_RELABEL_PATH = 'Z'
  67 } ItemType;
  68
  69 typedef struct Item {
  70         ItemType type;
  71
  72         char *path;
  73         uid_t uid;
  74         gid_t gid;
  75         mode_t mode;
  76         usec_t age;
  77
  78         bool uid_set:1;
  79         bool gid_set:1;
  80         bool mode_set:1;
  81         bool age_set:1;
  82 } Item;
  83
  84 static Hashmap *items = NULL, *globs = NULL;
  85 static Set *unix_sockets = NULL;
  86
  87 static bool arg_create = false;
  88 static bool arg_clean = false;
  89 static bool arg_remove = false;
  90
  91 static const char *arg_prefix = NULL;
  92
  93 #define MAX_DEPTH 256
  94
  95 static bool needs_glob(ItemType t) {
  96         return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RELABEL_PATH || t == RECURSIVE_RELABEL_PATH;
  97 }
  98
  99 static struct Item* find_glob(Hashmap *h, const char *match) {
 100         Item *j;
 101         Iterator i;
 102
 103         HASHMAP_FOREACH(j, h, i)
 104                 if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
 105                         return j;
 106
 107         return NULL;
 108 }
 109
 110 static void load_unix_sockets(void) {
 111         FILE *f = NULL;
 112         char line[LINE_MAX];
 113
 114         if (unix_sockets)
 115                 return;
 116
 117         /* We maintain a cache of the sockets we found in
 118          * /proc/net/unix to speed things up a little. */
 119
 120         if (!(unix_sockets = set_new(string_hash_func, string_compare_func)))
 121                 return;
 122
 123         if (!(f = fopen("/proc/net/unix", "re")))
 124                 return;
 125
 126         if (!(fgets(line, sizeof(line), f)))
 127                 goto fail;
 128
 129         for (;;) {
 130                 char *p, *s;
 131                 int k;
 132
 133                 if (!(fgets(line, sizeof(line), f)))
 134                         break;
 135
 136                 truncate_nl(line);
 137
 138                 if (strlen(line) < 53)
 139                         continue;
 140
 141                 p = line + 53;
 142                 p += strspn(p, WHITESPACE);
 143                 p += strcspn(p, WHITESPACE);
 144                 p += strspn(p, WHITESPACE);
 145
 146                 if (*p != '/')
 147                         continue;
 148
 149                 if (!(s = strdup(p)))
 150                         goto fail;
 151
 152                 path_kill_slashes(s);
 153
 154                 if ((k = set_put(unix_sockets, s)) < 0) {
 155                         free(s);
 156
 157                         if (k != -EEXIST)
 158                                 goto fail;
 159                 }
 160         }
 161
 162         fclose(f);
 163         return;
 164
 165 fail:
 166         set_free_free(unix_sockets);
 167         unix_sockets = NULL;
 168
 169         if (f)
 170                 fclose(f);
 171 }
 172
 173 static bool unix_socket_alive(const char *fn) {
 174         assert(fn);
 175
 176         load_unix_sockets();
 177
 178         if (unix_sockets)
 179                 return !!set_get(unix_sockets, (char*) fn);
 180
 181         /* We don't know, so assume yes */
 182         return true;
 183 }
 184
 185 static int dir_cleanup(
 186                 const char *p,
 187                 DIR *d,
 188                 const struct stat *ds,
 189                 usec_t cutoff,
 190                 dev_t rootdev,
 191                 bool mountpoint,
 192                 int maxdepth)
 193 {
 194         struct dirent *dent;
 195         struct timespec times[2];
 196         bool deleted = false;
 197         char *sub_path = NULL;
 198         int r = 0;
 199
 200         while ((dent = readdir(d))) {
 201                 struct stat s;
 202                 usec_t age;
 203
 204                 if (streq(dent->d_name, ".") ||
 205                     streq(dent->d_name, ".."))
 206                         continue;
 207
 208                 if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
 209
 210                         if (errno != ENOENT) {
 211                                 log_error("stat(%s/%s) failed: %m", p, dent->d_name);
 212                                 r = -errno;
 213                         }
 214
 215                         continue;
 216                 }
 217
 218                 /* Stay on the same filesystem */
 219                 if (s.st_dev != rootdev)
 220                         continue;
 221
 222                 /* Do not delete read-only files owned by root */
 223                 if (s.st_uid == 0 && !(s.st_mode & S_IWUSR))
 224                         continue;
 225
 226                 free(sub_path);
 227                 sub_path = NULL;
 228
 229                 if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) {
 230                         log_error("Out of memory");
 231                         r = -ENOMEM;
 232                         goto finish;
 233                 }
 234
 235                 /* Is there an item configured for this path? */
 236                 if (hashmap_get(items, sub_path))
 237                         continue;
 238
 239                 if (find_glob(globs, sub_path))
 240                         continue;
 241
 242                 if (S_ISDIR(s.st_mode)) {
 243
 244                         if (mountpoint &&
 245                             streq(dent->d_name, "lost+found") &&
 246                             s.st_uid == 0)
 247                                 continue;
 248
 249                         if (maxdepth <= 0)
 250                                 log_warning("Reached max depth on %s.", sub_path);
 251                         else {
 252                                 DIR *sub_dir;
 253                                 int q;
 254
 255                                 sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW);
 256                                 if (sub_dir == NULL) {
 257                                         if (errno != ENOENT) {
 258                                                 log_error("opendir(%s/%s) failed: %m", p, dent->d_name);
 259                                                 r = -errno;
 260                                         }
 261
 262                                         continue;
 263                                 }
 264
 265                                 q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1);
 266                                 closedir(sub_dir);
 267
 268                                 if (q < 0)
 269                                         r = q;
 270                         }
 271
 272                         /* Ignore ctime, we change it when deleting */
 273                         age = MAX(timespec_load(&s.st_mtim),
 274                                   timespec_load(&s.st_atim));
 275                         if (age >= cutoff)
 276                                 continue;
 277
 278                         log_debug("rmdir '%s'\n", sub_path);
 279
 280                         if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) {
 281                                 if (errno != ENOENT && errno != ENOTEMPTY) {
 282                                         log_error("rmdir(%s): %m", sub_path);
 283                                         r = -errno;
 284                                 }
 285                         }
 286
 287                 } else {
 288                         /* Skip files for which the sticky bit is
 289                          * set. These are semantics we define, and are
 290                          * unknown elsewhere. See XDG_RUNTIME_DIR
 291                          * specification for details. */
 292                         if (s.st_mode & S_ISVTX)
 293                                 continue;
 294
 295                         if (mountpoint && S_ISREG(s.st_mode)) {
 296                                 if (streq(dent->d_name, ".journal") &&
 297                                     s.st_uid == 0)
 298                                         continue;
 299
 300                                 if (streq(dent->d_name, "aquota.user") ||
 301                                     streq(dent->d_name, "aquota.group"))
 302                                         continue;
 303                         }
 304
 305                         /* Ignore sockets that are listed in /proc/net/unix */
 306                         if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path))
 307                                 continue;
 308
 309                         /* Ignore device nodes */
 310                         if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode))
 311                                 continue;
 312
 313                         age = MAX3(timespec_load(&s.st_mtim),
 314                                    timespec_load(&s.st_atim),
 315                                    timespec_load(&s.st_ctim));
 316
 317                         if (age >= cutoff)
 318                                 continue;
 319
 320                         log_debug("unlink '%s'\n", sub_path);
 321
 322                         if (unlinkat(dirfd(d), dent->d_name, 0) < 0) {
 323                                 if (errno != ENOENT) {
 324                                         log_error("unlink(%s): %m", sub_path);
 325                                         r = -errno;
 326                                 }
 327                         }
 328
 329                         deleted = true;
 330                 }
 331         }
 332
 333 finish:
 334         if (deleted) {
 335                 /* Restore original directory timestamps */
 336                 times[0] = ds->st_atim;
 337                 times[1] = ds->st_mtim;
 338
 339                 if (futimens(dirfd(d), times) < 0)
 340                         log_error("utimensat(%s): %m", p);
 341         }
 342
 343         free(sub_path);
 344
 345         return r;
 346 }
 347
 348 static int clean_item(Item *i) {
 349         DIR *d;
 350         struct stat s, ps;
 351         bool mountpoint;
 352         int r;
 353         usec_t cutoff, n;
 354
 355         assert(i);
 356
 357         if (i->type != CREATE_DIRECTORY &&
 358             i->type != TRUNCATE_DIRECTORY &&
 359             i->type != IGNORE_PATH)
 360                 return 0;
 361
 362         if (!i->age_set || i->age <= 0)
 363                 return 0;
 364
 365         n = now(CLOCK_REALTIME);
 366         if (n < i->age)
 367                 return 0;
 368
 369         cutoff = n - i->age;
 370
 371         d = opendir(i->path);
 372         if (!d) {
 373                 if (errno == ENOENT)
 374                         return 0;
 375
 376                 log_error("Failed to open directory %s: %m", i->path);
 377                 return -errno;
 378         }
 379
 380         if (fstat(dirfd(d), &s) < 0) {
 381                 log_error("stat(%s) failed: %m", i->path);
 382                 r = -errno;
 383                 goto finish;
 384         }
 385
 386         if (!S_ISDIR(s.st_mode)) {
 387                 log_error("%s is not a directory.", i->path);
 388                 r = -ENOTDIR;
 389                 goto finish;
 390         }
 391
 392         if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) {
 393                 log_error("stat(%s/..) failed: %m", i->path);
 394                 r = -errno;
 395                 goto finish;
 396         }
 397
 398         mountpoint = s.st_dev != ps.st_dev ||
 399                      (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino);
 400
 401         r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH);
 402
 403 finish:
 404         if (d)
 405                 closedir(d);
 406
 407         return r;
 408 }
 409
 410 static int item_set_perms(Item *i, const char *path) {
 411         /* not using i->path directly because it may be a glob */
 412         if (i->mode_set)
 413                 if (chmod(path, i->mode) < 0) {
 414                         log_error("chmod(%s) failed: %m", path);
 415                         return -errno;
 416                 }
 417
 418         if (i->uid_set || i->gid_set)
 419                 if (chown(path,
 420                           i->uid_set ? i->uid : (uid_t) -1,
 421                           i->gid_set ? i->gid : (gid_t) -1) < 0) {
 422
 423                         log_error("chown(%s) failed: %m", path);
 424                         return -errno;
 425                 }
 426
 427         return label_fix(path, false);
 428 }
 429
 430 static int recursive_relabel_children(Item *i, const char *path) {
 431         DIR *d;
 432         int ret = 0;
 433
 434         /* This returns the first error we run into, but nevertheless
 435          * tries to go on */
 436
 437         d = opendir(path);
 438         if (!d)
 439                 return errno == ENOENT ? 0 : -errno;
 440
 441         for (;;) {
 442                 struct dirent buf, *de;
 443                 bool is_dir;
 444                 int r;
 445                 char *entry_path;
 446
 447                 r = readdir_r(d, &buf, &de);
 448                 if (r != 0) {
 449                         if (ret == 0)
 450                                 ret = -r;
 451                         break;
 452                 }
 453
 454                 if (!de)
 455                         break;
 456
 457                 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
 458                         continue;
 459
 460                 if (asprintf(&entry_path, "%s/%s", path, de->d_name) < 0) {
 461                         if (ret == 0)
 462                                 ret = -ENOMEM;
 463                         continue;
 464                 }
 465
 466                 if (de->d_type == DT_UNKNOWN) {
 467                         struct stat st;
 468
 469                         if (lstat(entry_path, &st) < 0) {
 470                                 if (ret == 0 && errno != ENOENT)
 471                                         ret = -errno;
 472                                 free(entry_path);
 473                                 continue;
 474                         }
 475
 476                         is_dir = S_ISDIR(st.st_mode);
 477
 478                 } else
 479                         is_dir = de->d_type == DT_DIR;
 480
 481                 r = item_set_perms(i, entry_path);
 482                 if (r < 0) {
 483                         if (ret == 0 && r != -ENOENT)
 484                                 ret = r;
 485                         free(entry_path);
 486                         continue;
 487                 }
 488
 489                 if (is_dir) {
 490                         r = recursive_relabel_children(i, entry_path);
 491                         if (r < 0 && ret == 0)
 492                                 ret = r;
 493                 }
 494
 495                 free(entry_path);
 496         }
 497
 498         closedir(d);
 499
 500         return ret;
 501 }
 502
 503 static int recursive_relabel(Item *i, const char *path) {
 504         int r;
 505         struct stat st;
 506
 507         r = item_set_perms(i, path);
 508         if (r < 0)
 509                 return r;
 510
 511         if (lstat(path, &st) < 0)
 512                 return -errno;
 513
 514         if (S_ISDIR(st.st_mode))
 515                 r = recursive_relabel_children(i, path);
 516
 517         return r;
 518 }
 519
 520 static int glob_item(Item *i, int (*action)(Item *, const char *)) {
 521         int r = 0, k;
 522         glob_t g;
 523         char **fn;
 524
 525         zero(g);
 526
 527         errno = 0;
 528         if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) {
 529
 530                 if (k != GLOB_NOMATCH) {
 531                         if (errno != 0)
 532                                 errno = EIO;
 533
 534                         log_error("glob(%s) failed: %m", i->path);
 535                         return -errno;
 536                 }
 537         }
 538
 539         STRV_FOREACH(fn, g.gl_pathv)
 540                 if ((k = action(i, *fn)) < 0)
 541                         r = k;
 542
 543         globfree(&g);
 544         return r;
 545 }
 546
 547 static int create_item(Item *i) {
 548         int r;
 549         mode_t u;
 550         struct stat st;
 551
 552         assert(i);
 553
 554         switch (i->type) {
 555
 556         case IGNORE_PATH:
 557         case REMOVE_PATH:
 558         case RECURSIVE_REMOVE_PATH:
 559                 return 0;
 560
 561         case CREATE_FILE:
 562         case TRUNCATE_FILE: {
 563                 int fd;
 564
 565                 u = umask(0);
 566                 fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW|
 567                           (i->type == TRUNCATE_FILE ? O_TRUNC : 0), i->mode);
 568                 umask(u);
 569
 570                 if (fd < 0) {
 571                         log_error("Failed to create file %s: %m", i->path);
 572                         return -errno;
 573                 }
 574
 575                 close_nointr_nofail(fd);
 576
 577                 if (stat(i->path, &st) < 0) {
 578                         log_error("stat(%s) failed: %m", i->path);
 579                         return -errno;
 580                 }
 581
 582                 if (!S_ISREG(st.st_mode)) {
 583                         log_error("%s is not a file.", i->path);
 584                         return -EEXIST;
 585                 }
 586
 587                 r = item_set_perms(i, i->path);
 588                 if (r < 0)
 589                         return r;
 590
 591                 break;
 592         }
 593
 594         case TRUNCATE_DIRECTORY:
 595         case CREATE_DIRECTORY:
 596
 597                 u = umask(0);
 598                 mkdir_parents(i->path, 0755);
 599                 r = mkdir(i->path, i->mode);
 600                 umask(u);
 601
 602                 if (r < 0 && errno != EEXIST) {
 603                         log_error("Failed to create directory %s: %m", i->path);
 604                         return -errno;
 605                 }
 606
 607                 if (stat(i->path, &st) < 0) {
 608                         log_error("stat(%s) failed: %m", i->path);
 609                         return -errno;
 610                 }
 611
 612                 if (!S_ISDIR(st.st_mode)) {
 613                         log_error("%s is not a directory.", i->path);
 614                         return -EEXIST;
 615                 }
 616
 617                 r = item_set_perms(i, i->path);
 618                 if (r < 0)
 619                         return r;
 620
 621                 break;
 622
 623         case CREATE_FIFO:
 624
 625                 u = umask(0);
 626                 r = mkfifo(i->path, i->mode);
 627                 umask(u);
 628
 629                 if (r < 0 && errno != EEXIST) {
 630                         log_error("Failed to create fifo %s: %m", i->path);
 631                         return -errno;
 632                 }
 633
 634                 if (stat(i->path, &st) < 0) {
 635                         log_error("stat(%s) failed: %m", i->path);
 636                         return -errno;
 637                 }
 638
 639                 if (!S_ISFIFO(st.st_mode)) {
 640                         log_error("%s is not a fifo.", i->path);
 641                         return -EEXIST;
 642                 }
 643
 644                 r = item_set_perms(i, i->path);
 645                 if (r < 0)
 646                         return r;
 647
 648                 break;
 649
 650         case RELABEL_PATH:
 651
 652                 r = glob_item(i, item_set_perms);
 653                 if (r < 0)
 654                         return 0;
 655                 break;
 656
 657         case RECURSIVE_RELABEL_PATH:
 658
 659                 r = glob_item(i, recursive_relabel);
 660                 if (r < 0)
 661                         return r;
 662         }
 663
 664         log_debug("%s created successfully.", i->path);
 665
 666         return 0;
 667 }
 668
 669 static int remove_item_instance(Item *i, const char *instance) {
 670         int r;
 671
 672         assert(i);
 673
 674         switch (i->type) {
 675
 676         case CREATE_FILE:
 677         case TRUNCATE_FILE:
 678         case CREATE_DIRECTORY:
 679         case CREATE_FIFO:
 680         case IGNORE_PATH:
 681         case RELABEL_PATH:
 682         case RECURSIVE_RELABEL_PATH:
 683                 break;
 684
 685         case REMOVE_PATH:
 686                 if (remove(instance) < 0 && errno != ENOENT) {
 687                         log_error("remove(%s): %m", instance);
 688                         return -errno;
 689                 }
 690
 691                 break;
 692
 693         case TRUNCATE_DIRECTORY:
 694         case RECURSIVE_REMOVE_PATH:
 695                 if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false)) < 0 &&
 696                     r != -ENOENT) {
 697                         log_error("rm_rf(%s): %s", instance, strerror(-r));
 698                         return r;
 699                 }
 700
 701                 break;
 702         }
 703
 704         return 0;
 705 }
 706
 707 static int remove_item(Item *i) {
 708         int r = 0;
 709
 710         assert(i);
 711
 712         switch (i->type) {
 713
 714         case CREATE_FILE:
 715         case TRUNCATE_FILE:
 716         case CREATE_DIRECTORY:
 717         case CREATE_FIFO:
 718         case IGNORE_PATH:
 719         case RELABEL_PATH:
 720         case RECURSIVE_RELABEL_PATH:
 721                 break;
 722
 723         case REMOVE_PATH:
 724         case TRUNCATE_DIRECTORY:
 725         case RECURSIVE_REMOVE_PATH:
 726                 r = glob_item(i, remove_item_instance);
 727                 break;
 728         }
 729
 730         return r;
 731 }
 732
 733 static int process_item(Item *i) {
 734         int r, q, p;
 735
 736         assert(i);
 737
 738         r = arg_create ? create_item(i) : 0;
 739         q = arg_remove ? remove_item(i) : 0;
 740         p = arg_clean ? clean_item(i) : 0;
 741
 742         if (r < 0)
 743                 return r;
 744
 745         if (q < 0)
 746                 return q;
 747
 748         return p;
 749 }
 750
 751 static void item_free(Item *i) {
 752         assert(i);
 753
 754         free(i->path);
 755         free(i);
 756 }
 757
 758 static bool item_equal(Item *a, Item *b) {
 759         assert(a);
 760         assert(b);
 761
 762         if (!streq_ptr(a->path, b->path))
 763                 return false;
 764
 765         if (a->type != b->type)
 766                 return false;
 767
 768         if (a->uid_set != b->uid_set ||
 769             (a->uid_set && a->uid != b->uid))
 770             return false;
 771
 772         if (a->gid_set != b->gid_set ||
 773             (a->gid_set && a->gid != b->gid))
 774             return false;
 775
 776         if (a->mode_set != b->mode_set ||
 777             (a->mode_set && a->mode != b->mode))
 778             return false;
 779
 780         if (a->age_set != b->age_set ||
 781             (a->age_set && a->age != b->age))
 782             return false;
 783
 784         return true;
 785 }
 786
 787 static int parse_line(const char *fname, unsigned line, const char *buffer) {
 788         Item *i, *existing;
 789         char *mode = NULL, *user = NULL, *group = NULL, *age = NULL;
 790         char type;
 791         Hashmap *h;
 792         int r;
 793
 794         assert(fname);
 795         assert(line >= 1);
 796         assert(buffer);
 797
 798         if (!(i = new0(Item, 1))) {
 799                 log_error("Out of memory");
 800                 return -ENOMEM;
 801         }
 802
 803         if (sscanf(buffer,
 804                    "%c "
 805                    "%ms "
 806                    "%ms "
 807                    "%ms "
 808                    "%ms "
 809                    "%ms",
 810                    &type,
 811                    &i->path,
 812                    &mode,
 813                    &user,
 814                    &group,
 815                    &age) < 2) {
 816                 log_error("[%s:%u] Syntax error.", fname, line);
 817                 r = -EIO;
 818                 goto finish;
 819         }
 820
 821         switch(type) {
 822         case CREATE_FILE:
 823         case TRUNCATE_FILE:
 824         case CREATE_DIRECTORY:
 825         case TRUNCATE_DIRECTORY:
 826         case CREATE_FIFO:
 827         case IGNORE_PATH:
 828         case REMOVE_PATH:
 829         case RECURSIVE_REMOVE_PATH:
 830         case RELABEL_PATH:
 831         case RECURSIVE_RELABEL_PATH:
 832                 break;
 833         default:
 834                 log_error("[%s:%u] Unknown file type '%c'.", fname, line, type);
 835                 r = -EBADMSG;
 836                 goto finish;
 837         }
 838         i->type = type;
 839
 840         if (!path_is_absolute(i->path)) {
 841                 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path);
 842                 r = -EBADMSG;
 843                 goto finish;
 844         }
 845
 846         path_kill_slashes(i->path);
 847
 848         if (arg_prefix && !path_startswith(i->path, arg_prefix)) {
 849                 r = 0;
 850                 goto finish;
 851         }
 852
 853         if (user && !streq(user, "-")) {
 854                 const char *u = user;
 855
 856                 r = get_user_creds(&u, &i->uid, NULL, NULL);
 857                 if (r < 0) {
 858                         log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
 859                         goto finish;
 860                 }
 861
 862                 i->uid_set = true;
 863         }
 864
 865         if (group && !streq(group, "-")) {
 866                 const char *g = group;
 867
 868                 r = get_group_creds(&g, &i->gid);
 869                 if (r < 0) {
 870                         log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
 871                         goto finish;
 872                 }
 873
 874                 i->gid_set = true;
 875         }
 876
 877         if (mode && !streq(mode, "-")) {
 878                 unsigned m;
 879
 880                 if (sscanf(mode, "%o", &m) != 1) {
 881                         log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
 882                         r = -ENOENT;
 883                         goto finish;
 884                 }
 885
 886                 i->mode = m;
 887                 i->mode_set = true;
 888         } else
 889                 i->mode = i->type == CREATE_DIRECTORY ? 0755 : 0644;
 890
 891         if (age && !streq(age, "-")) {
 892                 if (parse_usec(age, &i->age) < 0) {
 893                         log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
 894                         r = -EBADMSG;
 895                         goto finish;
 896                 }
 897
 898                 i->age_set = true;
 899         }
 900
 901         h = needs_glob(i->type) ? globs : items;
 902
 903         if ((existing = hashmap_get(h, i->path))) {
 904
 905                 /* Two identical items are fine */
 906                 if (!item_equal(existing, i))
 907                         log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path);
 908
 909                 r = 0;
 910                 goto finish;
 911         }
 912
 913         if ((r = hashmap_put(h, i->path, i)) < 0) {
 914                 log_error("Failed to insert item %s: %s", i->path, strerror(-r));
 915                 goto finish;
 916         }
 917
 918         i = NULL;
 919         r = 0;
 920
 921 finish:
 922         free(user);
 923         free(group);
 924         free(mode);
 925         free(age);
 926
 927         if (i)
 928                 item_free(i);
 929
 930         return r;
 931 }
 932
 933 static int help(void) {
 934
 935         printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
 936                "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
 937                "  -h --help             Show this help\n"
 938                "     --create           Create marked files/directories\n"
 939                "     --clean            Clean up marked directories\n"
 940                "     --remove           Remove marked files/directories\n"
 941                "     --prefix=PATH      Only apply rules that apply to paths with the specified prefix\n",
 942                program_invocation_short_name);
 943
 944         return 0;
 945 }
 946
 947 static int parse_argv(int argc, char *argv[]) {
 948
 949         enum {
 950                 ARG_CREATE,
 951                 ARG_CLEAN,
 952                 ARG_REMOVE,
 953                 ARG_PREFIX
 954         };
 955
 956         static const struct option options[] = {
 957                 { "help",      no_argument,       NULL, 'h'           },
 958                 { "create",    no_argument,       NULL, ARG_CREATE    },
 959                 { "clean",     no_argument,       NULL, ARG_CLEAN     },
 960                 { "remove",    no_argument,       NULL, ARG_REMOVE    },
 961                 { "prefix",    required_argument, NULL, ARG_PREFIX    },
 962                 { NULL,        0,                 NULL, 0             }
 963         };
 964
 965         int c;
 966
 967         assert(argc >= 0);
 968         assert(argv);
 969
 970         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
 971
 972                 switch (c) {
 973
 974                 case 'h':
 975                         help();
 976                         return 0;
 977
 978                 case ARG_CREATE:
 979                         arg_create = true;
 980                         break;
 981
 982                 case ARG_CLEAN:
 983                         arg_clean = true;
 984                         break;
 985
 986                 case ARG_REMOVE:
 987                         arg_remove = true;
 988                         break;
 989
 990                 case ARG_PREFIX:
 991                         arg_prefix = optarg;
 992                         break;
 993
 994                 case '?':
 995                         return -EINVAL;
 996
 997                 default:
 998                         log_error("Unknown option code %c", c);
 999                         return -EINVAL;
1000                 }
1001         }
1002
1003         if (!arg_clean && !arg_create && !arg_remove) {
1004                 log_error("You need to specify at least one of --clean, --create or --remove.");
1005                 return -EINVAL;
1006         }
1007
1008         return 1;
1009 }
1010
1011 static int read_config_file(const char *fn, bool ignore_enoent) {
1012         FILE *f;
1013         unsigned v = 0;
1014         int r = 0;
1015
1016         assert(fn);
1017
1018         if (!(f = fopen(fn, "re"))) {
1019
1020                 if (ignore_enoent && errno == ENOENT)
1021                         return 0;
1022
1023                 log_error("Failed to open %s: %m", fn);
1024                 return -errno;
1025         }
1026
1027         log_debug("apply: %s\n", fn);
1028         for (;;) {
1029                 char line[LINE_MAX], *l;
1030                 int k;
1031
1032                 if (!(fgets(line, sizeof(line), f)))
1033                         break;
1034
1035                 v++;
1036
1037                 l = strstrip(line);
1038                 if (*l == '#' || *l == 0)
1039                         continue;
1040
1041                 if ((k = parse_line(fn, v, l)) < 0)
1042                         if (r == 0)
1043                                 r = k;
1044         }
1045
1046         if (ferror(f)) {
1047                 log_error("Failed to read from file %s: %m", fn);
1048                 if (r == 0)
1049                         r = -EIO;
1050         }
1051
1052         fclose(f);
1053
1054         return r;
1055 }
1056
1057 int main(int argc, char *argv[]) {
1058         int r;
1059         Item *i;
1060         Iterator iterator;
1061
1062         if ((r = parse_argv(argc, argv)) <= 0)
1063                 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1064
1065         log_set_target(LOG_TARGET_AUTO);
1066         log_parse_environment();
1067         log_open();
1068
1069         umask(0022);
1070
1071         label_init();
1072
1073         items = hashmap_new(string_hash_func, string_compare_func);
1074         globs = hashmap_new(string_hash_func, string_compare_func);
1075
1076         if (!items || !globs) {
1077                 log_error("Out of memory");
1078                 r = EXIT_FAILURE;
1079                 goto finish;
1080         }
1081
1082         r = EXIT_SUCCESS;
1083
1084         if (optind < argc) {
1085                 int j;
1086
1087                 for (j = optind; j < argc; j++)
1088                         if (read_config_file(argv[j], false) < 0)
1089                                 r = EXIT_FAILURE;
1090
1091         } else {
1092                 char **files, **f;
1093
1094                 r = conf_files_list(&files, ".conf",
1095                                     "/run/tmpfiles.d",
1096                                     "/etc/tmpfiles.d",
1097                                     "/usr/local/lib/tmpfiles.d",
1098                                     "/usr/lib/tmpfiles.d",
1099                                     NULL);
1100                 if (r < 0) {
1101                         r = EXIT_FAILURE;
1102                         log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r));
1103                         goto finish;
1104                 }
1105
1106                 STRV_FOREACH(f, files) {
1107                         if (read_config_file(*f, true) < 0)
1108                                 r = EXIT_FAILURE;
1109                 }
1110
1111                 strv_free(files);
1112         }
1113
1114         HASHMAP_FOREACH(i, globs, iterator)
1115                 process_item(i);
1116
1117         HASHMAP_FOREACH(i, items, iterator)
1118                 process_item(i);
1119
1120 finish:
1121         while ((i = hashmap_steal_first(items)))
1122                 item_free(i);
1123
1124         while ((i = hashmap_steal_first(globs)))
1125                 item_free(i);
1126
1127         hashmap_free(items);
1128         hashmap_free(globs);
1129
1130         set_free_free(unix_sockets);
1131
1132         label_finish();
1133
1134         return r;
1135 }