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