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