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tmpfiles: use safe_glob()
[thirdparty/systemd.git] / src / tmpfiles / tmpfiles.c
1 /***
2 This file is part of systemd.
3
4 Copyright 2010 Lennart Poettering, Kay Sievers
5 Copyright 2015 Zbigniew Jędrzejewski-Szmek
6
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
11
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
19 ***/
20
21 #include <errno.h>
22 #include <fcntl.h>
23 #include <fnmatch.h>
24 #include <getopt.h>
25 #include <glob.h>
26 #include <limits.h>
27 #include <linux/fs.h>
28 #include <stdbool.h>
29 #include <stddef.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <sys/stat.h>
34 #include <sys/xattr.h>
35 #include <time.h>
36 #include <unistd.h>
37
38 #include "acl-util.h"
39 #include "alloc-util.h"
40 #include "btrfs-util.h"
41 #include "capability-util.h"
42 #include "chattr-util.h"
43 #include "conf-files.h"
44 #include "copy.h"
45 #include "def.h"
46 #include "dirent-util.h"
47 #include "escape.h"
48 #include "fd-util.h"
49 #include "fileio.h"
50 #include "format-util.h"
51 #include "fs-util.h"
52 #include "glob-util.h"
53 #include "io-util.h"
54 #include "label.h"
55 #include "log.h"
56 #include "macro.h"
57 #include "missing.h"
58 #include "mkdir.h"
59 #include "mount-util.h"
60 #include "parse-util.h"
61 #include "path-util.h"
62 #include "rm-rf.h"
63 #include "selinux-util.h"
64 #include "set.h"
65 #include "specifier.h"
66 #include "stat-util.h"
67 #include "stdio-util.h"
68 #include "string-table.h"
69 #include "string-util.h"
70 #include "strv.h"
71 #include "umask-util.h"
72 #include "user-util.h"
73 #include "util.h"
74
75 /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
76 * them in the file system. This is intended to be used to create
77 * properly owned directories beneath /tmp, /var/tmp, /run, which are
78 * volatile and hence need to be recreated on bootup. */
79
80 typedef enum ItemType {
81 /* These ones take file names */
82 CREATE_FILE = 'f',
83 TRUNCATE_FILE = 'F',
84 CREATE_DIRECTORY = 'd',
85 TRUNCATE_DIRECTORY = 'D',
86 CREATE_SUBVOLUME = 'v',
87 CREATE_SUBVOLUME_INHERIT_QUOTA = 'q',
88 CREATE_SUBVOLUME_NEW_QUOTA = 'Q',
89 CREATE_FIFO = 'p',
90 CREATE_SYMLINK = 'L',
91 CREATE_CHAR_DEVICE = 'c',
92 CREATE_BLOCK_DEVICE = 'b',
93 COPY_FILES = 'C',
94
95 /* These ones take globs */
96 WRITE_FILE = 'w',
97 EMPTY_DIRECTORY = 'e',
98 SET_XATTR = 't',
99 RECURSIVE_SET_XATTR = 'T',
100 SET_ACL = 'a',
101 RECURSIVE_SET_ACL = 'A',
102 SET_ATTRIBUTE = 'h',
103 RECURSIVE_SET_ATTRIBUTE = 'H',
104 IGNORE_PATH = 'x',
105 IGNORE_DIRECTORY_PATH = 'X',
106 REMOVE_PATH = 'r',
107 RECURSIVE_REMOVE_PATH = 'R',
108 RELABEL_PATH = 'z',
109 RECURSIVE_RELABEL_PATH = 'Z',
110 ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */
111 } ItemType;
112
113 typedef struct Item {
114 ItemType type;
115
116 char *path;
117 char *argument;
118 char **xattrs;
119 #ifdef HAVE_ACL
120 acl_t acl_access;
121 acl_t acl_default;
122 #endif
123 uid_t uid;
124 gid_t gid;
125 mode_t mode;
126 usec_t age;
127
128 dev_t major_minor;
129 unsigned attribute_value;
130 unsigned attribute_mask;
131
132 bool uid_set:1;
133 bool gid_set:1;
134 bool mode_set:1;
135 bool age_set:1;
136 bool mask_perms:1;
137 bool attribute_set:1;
138
139 bool keep_first_level:1;
140
141 bool force:1;
142
143 bool done:1;
144 } Item;
145
146 typedef struct ItemArray {
147 Item *items;
148 size_t count;
149 size_t size;
150 } ItemArray;
151
152 static bool arg_create = false;
153 static bool arg_clean = false;
154 static bool arg_remove = false;
155 static bool arg_boot = false;
156
157 static char **arg_include_prefixes = NULL;
158 static char **arg_exclude_prefixes = NULL;
159 static char *arg_root = NULL;
160
161 static const char conf_file_dirs[] = CONF_PATHS_NULSTR("tmpfiles.d");
162
163 #define MAX_DEPTH 256
164
165 static OrderedHashmap *items = NULL, *globs = NULL;
166 static Set *unix_sockets = NULL;
167
168 static const Specifier specifier_table[] = {
169 { 'm', specifier_machine_id, NULL },
170 { 'b', specifier_boot_id, NULL },
171 { 'H', specifier_host_name, NULL },
172 { 'v', specifier_kernel_release, NULL },
173 {}
174 };
175
176 static bool needs_glob(ItemType t) {
177 return IN_SET(t,
178 WRITE_FILE,
179 IGNORE_PATH,
180 IGNORE_DIRECTORY_PATH,
181 REMOVE_PATH,
182 RECURSIVE_REMOVE_PATH,
183 EMPTY_DIRECTORY,
184 ADJUST_MODE,
185 RELABEL_PATH,
186 RECURSIVE_RELABEL_PATH,
187 SET_XATTR,
188 RECURSIVE_SET_XATTR,
189 SET_ACL,
190 RECURSIVE_SET_ACL,
191 SET_ATTRIBUTE,
192 RECURSIVE_SET_ATTRIBUTE);
193 }
194
195 static bool takes_ownership(ItemType t) {
196 return IN_SET(t,
197 CREATE_FILE,
198 TRUNCATE_FILE,
199 CREATE_DIRECTORY,
200 EMPTY_DIRECTORY,
201 TRUNCATE_DIRECTORY,
202 CREATE_SUBVOLUME,
203 CREATE_SUBVOLUME_INHERIT_QUOTA,
204 CREATE_SUBVOLUME_NEW_QUOTA,
205 CREATE_FIFO,
206 CREATE_SYMLINK,
207 CREATE_CHAR_DEVICE,
208 CREATE_BLOCK_DEVICE,
209 COPY_FILES,
210 WRITE_FILE,
211 IGNORE_PATH,
212 IGNORE_DIRECTORY_PATH,
213 REMOVE_PATH,
214 RECURSIVE_REMOVE_PATH);
215 }
216
217 static struct Item* find_glob(OrderedHashmap *h, const char *match) {
218 ItemArray *j;
219 Iterator i;
220
221 ORDERED_HASHMAP_FOREACH(j, h, i) {
222 unsigned n;
223
224 for (n = 0; n < j->count; n++) {
225 Item *item = j->items + n;
226
227 if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
228 return item;
229 }
230 }
231
232 return NULL;
233 }
234
235 static void load_unix_sockets(void) {
236 _cleanup_fclose_ FILE *f = NULL;
237 char line[LINE_MAX];
238
239 if (unix_sockets)
240 return;
241
242 /* We maintain a cache of the sockets we found in
243 * /proc/net/unix to speed things up a little. */
244
245 unix_sockets = set_new(&string_hash_ops);
246 if (!unix_sockets)
247 return;
248
249 f = fopen("/proc/net/unix", "re");
250 if (!f)
251 return;
252
253 /* Skip header */
254 if (!fgets(line, sizeof(line), f))
255 goto fail;
256
257 for (;;) {
258 char *p, *s;
259 int k;
260
261 if (!fgets(line, sizeof(line), f))
262 break;
263
264 truncate_nl(line);
265
266 p = strchr(line, ':');
267 if (!p)
268 continue;
269
270 if (strlen(p) < 37)
271 continue;
272
273 p += 37;
274 p += strspn(p, WHITESPACE);
275 p += strcspn(p, WHITESPACE); /* skip one more word */
276 p += strspn(p, WHITESPACE);
277
278 if (*p != '/')
279 continue;
280
281 s = strdup(p);
282 if (!s)
283 goto fail;
284
285 path_kill_slashes(s);
286
287 k = set_consume(unix_sockets, s);
288 if (k < 0 && k != -EEXIST)
289 goto fail;
290 }
291
292 return;
293
294 fail:
295 set_free_free(unix_sockets);
296 unix_sockets = NULL;
297 }
298
299 static bool unix_socket_alive(const char *fn) {
300 assert(fn);
301
302 load_unix_sockets();
303
304 if (unix_sockets)
305 return !!set_get(unix_sockets, (char*) fn);
306
307 /* We don't know, so assume yes */
308 return true;
309 }
310
311 static int dir_is_mount_point(DIR *d, const char *subdir) {
312
313 union file_handle_union h = FILE_HANDLE_INIT;
314 int mount_id_parent, mount_id;
315 int r_p, r;
316
317 r_p = name_to_handle_at(dirfd(d), ".", &h.handle, &mount_id_parent, 0);
318 if (r_p < 0)
319 r_p = -errno;
320
321 h.handle.handle_bytes = MAX_HANDLE_SZ;
322 r = name_to_handle_at(dirfd(d), subdir, &h.handle, &mount_id, 0);
323 if (r < 0)
324 r = -errno;
325
326 /* got no handle; make no assumptions, return error */
327 if (r_p < 0 && r < 0)
328 return r_p;
329
330 /* got both handles; if they differ, it is a mount point */
331 if (r_p >= 0 && r >= 0)
332 return mount_id_parent != mount_id;
333
334 /* got only one handle; assume different mount points if one
335 * of both queries was not supported by the filesystem */
336 if (r_p == -ENOSYS || r_p == -EOPNOTSUPP || r == -ENOSYS || r == -EOPNOTSUPP)
337 return true;
338
339 /* return error */
340 if (r_p < 0)
341 return r_p;
342 return r;
343 }
344
345 static DIR* xopendirat_nomod(int dirfd, const char *path) {
346 DIR *dir;
347
348 dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME);
349 if (dir)
350 return dir;
351
352 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
353 if (errno != EPERM)
354 return NULL;
355
356 dir = xopendirat(dirfd, path, O_NOFOLLOW);
357 if (!dir)
358 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
359
360 return dir;
361 }
362
363 static DIR* opendir_nomod(const char *path) {
364 return xopendirat_nomod(AT_FDCWD, path);
365 }
366
367 static int dir_cleanup(
368 Item *i,
369 const char *p,
370 DIR *d,
371 const struct stat *ds,
372 usec_t cutoff,
373 dev_t rootdev,
374 bool mountpoint,
375 int maxdepth,
376 bool keep_this_level) {
377
378 struct dirent *dent;
379 struct timespec times[2];
380 bool deleted = false;
381 int r = 0;
382
383 FOREACH_DIRENT_ALL(dent, d, break) {
384 struct stat s;
385 usec_t age;
386 _cleanup_free_ char *sub_path = NULL;
387
388 if (dot_or_dot_dot(dent->d_name))
389 continue;
390
391 if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
392 if (errno == ENOENT)
393 continue;
394
395 /* FUSE, NFS mounts, SELinux might return EACCES */
396 if (errno == EACCES)
397 log_debug_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name);
398 else
399 log_error_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name);
400 r = -errno;
401 continue;
402 }
403
404 /* Stay on the same filesystem */
405 if (s.st_dev != rootdev) {
406 log_debug("Ignoring \"%s/%s\": different filesystem.", p, dent->d_name);
407 continue;
408 }
409
410 /* Try to detect bind mounts of the same filesystem instance; they
411 * do not differ in device major/minors. This type of query is not
412 * supported on all kernels or filesystem types though. */
413 if (S_ISDIR(s.st_mode) && dir_is_mount_point(d, dent->d_name) > 0) {
414 log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.",
415 p, dent->d_name);
416 continue;
417 }
418
419 /* Do not delete read-only files owned by root */
420 if (s.st_uid == 0 && !(s.st_mode & S_IWUSR)) {
421 log_debug("Ignoring \"%s/%s\": read-only and owner by root.", p, dent->d_name);
422 continue;
423 }
424
425 sub_path = strjoin(p, "/", dent->d_name);
426 if (!sub_path) {
427 r = log_oom();
428 goto finish;
429 }
430
431 /* Is there an item configured for this path? */
432 if (ordered_hashmap_get(items, sub_path)) {
433 log_debug("Ignoring \"%s\": a separate entry exists.", sub_path);
434 continue;
435 }
436
437 if (find_glob(globs, sub_path)) {
438 log_debug("Ignoring \"%s\": a separate glob exists.", sub_path);
439 continue;
440 }
441
442 if (S_ISDIR(s.st_mode)) {
443
444 if (mountpoint &&
445 streq(dent->d_name, "lost+found") &&
446 s.st_uid == 0) {
447 log_debug("Ignoring \"%s\".", sub_path);
448 continue;
449 }
450
451 if (maxdepth <= 0)
452 log_warning("Reached max depth on \"%s\".", sub_path);
453 else {
454 _cleanup_closedir_ DIR *sub_dir;
455 int q;
456
457 sub_dir = xopendirat_nomod(dirfd(d), dent->d_name);
458 if (!sub_dir) {
459 if (errno != ENOENT)
460 r = log_error_errno(errno, "opendir(%s) failed: %m", sub_path);
461
462 continue;
463 }
464
465 q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);
466 if (q < 0)
467 r = q;
468 }
469
470 /* Note: if you are wondering why we don't
471 * support the sticky bit for excluding
472 * directories from cleaning like we do it for
473 * other file system objects: well, the sticky
474 * bit already has a meaning for directories,
475 * so we don't want to overload that. */
476
477 if (keep_this_level) {
478 log_debug("Keeping \"%s\".", sub_path);
479 continue;
480 }
481
482 /* Ignore ctime, we change it when deleting */
483 age = timespec_load(&s.st_mtim);
484 if (age >= cutoff) {
485 char a[FORMAT_TIMESTAMP_MAX];
486 /* Follows spelling in stat(1). */
487 log_debug("Directory \"%s\": modify time %s is too new.",
488 sub_path,
489 format_timestamp_us(a, sizeof(a), age));
490 continue;
491 }
492
493 age = timespec_load(&s.st_atim);
494 if (age >= cutoff) {
495 char a[FORMAT_TIMESTAMP_MAX];
496 log_debug("Directory \"%s\": access time %s is too new.",
497 sub_path,
498 format_timestamp_us(a, sizeof(a), age));
499 continue;
500 }
501
502 log_debug("Removing directory \"%s\".", sub_path);
503 if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0)
504 if (errno != ENOENT && errno != ENOTEMPTY) {
505 log_error_errno(errno, "rmdir(%s): %m", sub_path);
506 r = -errno;
507 }
508
509 } else {
510 /* Skip files for which the sticky bit is
511 * set. These are semantics we define, and are
512 * unknown elsewhere. See XDG_RUNTIME_DIR
513 * specification for details. */
514 if (s.st_mode & S_ISVTX) {
515 log_debug("Skipping \"%s\": sticky bit set.", sub_path);
516 continue;
517 }
518
519 if (mountpoint && S_ISREG(s.st_mode))
520 if (s.st_uid == 0 && STR_IN_SET(dent->d_name,
521 ".journal",
522 "aquota.user",
523 "aquota.group")) {
524 log_debug("Skipping \"%s\".", sub_path);
525 continue;
526 }
527
528 /* Ignore sockets that are listed in /proc/net/unix */
529 if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) {
530 log_debug("Skipping \"%s\": live socket.", sub_path);
531 continue;
532 }
533
534 /* Ignore device nodes */
535 if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) {
536 log_debug("Skipping \"%s\": a device.", sub_path);
537 continue;
538 }
539
540 /* Keep files on this level around if this is
541 * requested */
542 if (keep_this_level) {
543 log_debug("Keeping \"%s\".", sub_path);
544 continue;
545 }
546
547 age = timespec_load(&s.st_mtim);
548 if (age >= cutoff) {
549 char a[FORMAT_TIMESTAMP_MAX];
550 /* Follows spelling in stat(1). */
551 log_debug("File \"%s\": modify time %s is too new.",
552 sub_path,
553 format_timestamp_us(a, sizeof(a), age));
554 continue;
555 }
556
557 age = timespec_load(&s.st_atim);
558 if (age >= cutoff) {
559 char a[FORMAT_TIMESTAMP_MAX];
560 log_debug("File \"%s\": access time %s is too new.",
561 sub_path,
562 format_timestamp_us(a, sizeof(a), age));
563 continue;
564 }
565
566 age = timespec_load(&s.st_ctim);
567 if (age >= cutoff) {
568 char a[FORMAT_TIMESTAMP_MAX];
569 log_debug("File \"%s\": change time %s is too new.",
570 sub_path,
571 format_timestamp_us(a, sizeof(a), age));
572 continue;
573 }
574
575 log_debug("unlink \"%s\"", sub_path);
576
577 if (unlinkat(dirfd(d), dent->d_name, 0) < 0)
578 if (errno != ENOENT)
579 r = log_error_errno(errno, "unlink(%s): %m", sub_path);
580
581 deleted = true;
582 }
583 }
584
585 finish:
586 if (deleted) {
587 usec_t age1, age2;
588 char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX];
589
590 /* Restore original directory timestamps */
591 times[0] = ds->st_atim;
592 times[1] = ds->st_mtim;
593
594 age1 = timespec_load(&ds->st_atim);
595 age2 = timespec_load(&ds->st_mtim);
596 log_debug("Restoring access and modification time on \"%s\": %s, %s",
597 p,
598 format_timestamp_us(a, sizeof(a), age1),
599 format_timestamp_us(b, sizeof(b), age2));
600 if (futimens(dirfd(d), times) < 0)
601 log_error_errno(errno, "utimensat(%s): %m", p);
602 }
603
604 return r;
605 }
606
607 static int path_set_perms(Item *i, const char *path) {
608 _cleanup_close_ int fd = -1;
609 struct stat st;
610
611 assert(i);
612 assert(path);
613
614 /* We open the file with O_PATH here, to make the operation
615 * somewhat atomic. Also there's unfortunately no fchmodat()
616 * with AT_SYMLINK_NOFOLLOW, hence we emulate it here via
617 * O_PATH. */
618
619 fd = open(path, O_NOFOLLOW|O_CLOEXEC|O_PATH);
620 if (fd < 0)
621 return log_error_errno(errno, "Adjusting owner and mode for %s failed: %m", path);
622
623 if (fstatat(fd, "", &st, AT_EMPTY_PATH) < 0)
624 return log_error_errno(errno, "Failed to fstat() file %s: %m", path);
625
626 if (S_ISLNK(st.st_mode))
627 log_debug("Skipping mode an owner fix for symlink %s.", path);
628 else {
629 char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
630 xsprintf(fn, "/proc/self/fd/%i", fd);
631
632 /* not using i->path directly because it may be a glob */
633 if (i->mode_set) {
634 mode_t m = i->mode;
635
636 if (i->mask_perms) {
637 if (!(st.st_mode & 0111))
638 m &= ~0111;
639 if (!(st.st_mode & 0222))
640 m &= ~0222;
641 if (!(st.st_mode & 0444))
642 m &= ~0444;
643 if (!S_ISDIR(st.st_mode))
644 m &= ~07000; /* remove sticky/sgid/suid bit, unless directory */
645 }
646
647 if (m == (st.st_mode & 07777))
648 log_debug("\"%s\" has right mode %o", path, st.st_mode);
649 else {
650 log_debug("chmod \"%s\" to mode %o", path, m);
651 if (chmod(fn, m) < 0)
652 return log_error_errno(errno, "chmod() of %s via %s failed: %m", path, fn);
653 }
654 }
655
656 if ((i->uid != st.st_uid || i->gid != st.st_gid) &&
657 (i->uid_set || i->gid_set)) {
658 log_debug("chown \"%s\" to "UID_FMT"."GID_FMT,
659 path,
660 i->uid_set ? i->uid : UID_INVALID,
661 i->gid_set ? i->gid : GID_INVALID);
662 if (chown(fn,
663 i->uid_set ? i->uid : UID_INVALID,
664 i->gid_set ? i->gid : GID_INVALID) < 0)
665 return log_error_errno(errno, "chown() of %s via %s failed: %m", path, fn);
666 }
667 }
668
669 fd = safe_close(fd);
670
671 return label_fix(path, false, false);
672 }
673
674 static int parse_xattrs_from_arg(Item *i) {
675 const char *p;
676 int r;
677
678 assert(i);
679 assert(i->argument);
680
681 p = i->argument;
682
683 for (;;) {
684 _cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL, *xattr_replaced = NULL;
685
686 r = extract_first_word(&p, &xattr, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE);
687 if (r < 0)
688 log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p);
689 if (r <= 0)
690 break;
691
692 r = specifier_printf(xattr, specifier_table, NULL, &xattr_replaced);
693 if (r < 0)
694 return log_error_errno(r, "Failed to replace specifiers in extended attribute '%s': %m", xattr);
695
696 r = split_pair(xattr_replaced, "=", &name, &value);
697 if (r < 0) {
698 log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr);
699 continue;
700 }
701
702 if (isempty(name) || isempty(value)) {
703 log_warning("Malformed extended attribute found, ignoring: %s", xattr);
704 continue;
705 }
706
707 if (strv_push_pair(&i->xattrs, name, value) < 0)
708 return log_oom();
709
710 name = value = NULL;
711 }
712
713 return 0;
714 }
715
716 static int path_set_xattrs(Item *i, const char *path) {
717 char **name, **value;
718
719 assert(i);
720 assert(path);
721
722 STRV_FOREACH_PAIR(name, value, i->xattrs) {
723 int n;
724
725 n = strlen(*value);
726 log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path);
727 if (lsetxattr(path, *name, *value, n, 0) < 0) {
728 log_error("Setting extended attribute %s=%s on %s failed: %m", *name, *value, path);
729 return -errno;
730 }
731 }
732 return 0;
733 }
734
735 static int parse_acls_from_arg(Item *item) {
736 #ifdef HAVE_ACL
737 int r;
738
739 assert(item);
740
741 /* If force (= modify) is set, we will not modify the acl
742 * afterwards, so the mask can be added now if necessary. */
743
744 r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force);
745 if (r < 0)
746 log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument);
747 #else
748 log_warning_errno(ENOSYS, "ACLs are not supported. Ignoring");
749 #endif
750
751 return 0;
752 }
753
754 #ifdef HAVE_ACL
755 static int path_set_acl(const char *path, const char *pretty, acl_type_t type, acl_t acl, bool modify) {
756 _cleanup_(acl_free_charpp) char *t = NULL;
757 _cleanup_(acl_freep) acl_t dup = NULL;
758 int r;
759
760 /* Returns 0 for success, positive error if already warned,
761 * negative error otherwise. */
762
763 if (modify) {
764 r = acls_for_file(path, type, acl, &dup);
765 if (r < 0)
766 return r;
767
768 r = calc_acl_mask_if_needed(&dup);
769 if (r < 0)
770 return r;
771 } else {
772 dup = acl_dup(acl);
773 if (!dup)
774 return -errno;
775
776 /* the mask was already added earlier if needed */
777 }
778
779 r = add_base_acls_if_needed(&dup, path);
780 if (r < 0)
781 return r;
782
783 t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);
784 log_debug("Setting %s ACL %s on %s.",
785 type == ACL_TYPE_ACCESS ? "access" : "default",
786 strna(t), pretty);
787
788 r = acl_set_file(path, type, dup);
789 if (r < 0)
790 /* Return positive to indicate we already warned */
791 return -log_error_errno(errno,
792 "Setting %s ACL \"%s\" on %s failed: %m",
793 type == ACL_TYPE_ACCESS ? "access" : "default",
794 strna(t), pretty);
795
796 return 0;
797 }
798 #endif
799
800 static int path_set_acls(Item *item, const char *path) {
801 int r = 0;
802 #ifdef HAVE_ACL
803 char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
804 _cleanup_close_ int fd = -1;
805 struct stat st;
806
807 assert(item);
808 assert(path);
809
810 fd = open(path, O_NOFOLLOW|O_CLOEXEC|O_PATH);
811 if (fd < 0)
812 return log_error_errno(errno, "Adjusting ACL of %s failed: %m", path);
813
814 if (fstatat(fd, "", &st, AT_EMPTY_PATH) < 0)
815 return log_error_errno(errno, "Failed to fstat() file %s: %m", path);
816
817 if (S_ISLNK(st.st_mode)) {
818 log_debug("Skipping ACL fix for symlink %s.", path);
819 return 0;
820 }
821
822 xsprintf(fn, "/proc/self/fd/%i", fd);
823
824 if (item->acl_access)
825 r = path_set_acl(fn, path, ACL_TYPE_ACCESS, item->acl_access, item->force);
826
827 if (r == 0 && item->acl_default)
828 r = path_set_acl(fn, path, ACL_TYPE_DEFAULT, item->acl_default, item->force);
829
830 if (r > 0)
831 return -r; /* already warned */
832 else if (r == -EOPNOTSUPP) {
833 log_debug_errno(r, "ACLs not supported by file system at %s", path);
834 return 0;
835 } else if (r < 0)
836 log_error_errno(r, "ACL operation on \"%s\" failed: %m", path);
837 #endif
838 return r;
839 }
840
841 #define ATTRIBUTES_ALL \
842 (FS_NOATIME_FL | \
843 FS_SYNC_FL | \
844 FS_DIRSYNC_FL | \
845 FS_APPEND_FL | \
846 FS_COMPR_FL | \
847 FS_NODUMP_FL | \
848 FS_EXTENT_FL | \
849 FS_IMMUTABLE_FL | \
850 FS_JOURNAL_DATA_FL | \
851 FS_SECRM_FL | \
852 FS_UNRM_FL | \
853 FS_NOTAIL_FL | \
854 FS_TOPDIR_FL | \
855 FS_NOCOW_FL)
856
857 static int parse_attribute_from_arg(Item *item) {
858
859 static const struct {
860 char character;
861 unsigned value;
862 } attributes[] = {
863 { 'A', FS_NOATIME_FL }, /* do not update atime */
864 { 'S', FS_SYNC_FL }, /* Synchronous updates */
865 { 'D', FS_DIRSYNC_FL }, /* dirsync behaviour (directories only) */
866 { 'a', FS_APPEND_FL }, /* writes to file may only append */
867 { 'c', FS_COMPR_FL }, /* Compress file */
868 { 'd', FS_NODUMP_FL }, /* do not dump file */
869 { 'e', FS_EXTENT_FL }, /* Extents */
870 { 'i', FS_IMMUTABLE_FL }, /* Immutable file */
871 { 'j', FS_JOURNAL_DATA_FL }, /* Reserved for ext3 */
872 { 's', FS_SECRM_FL }, /* Secure deletion */
873 { 'u', FS_UNRM_FL }, /* Undelete */
874 { 't', FS_NOTAIL_FL }, /* file tail should not be merged */
875 { 'T', FS_TOPDIR_FL }, /* Top of directory hierarchies */
876 { 'C', FS_NOCOW_FL }, /* Do not cow file */
877 };
878
879 enum {
880 MODE_ADD,
881 MODE_DEL,
882 MODE_SET
883 } mode = MODE_ADD;
884
885 unsigned value = 0, mask = 0;
886 const char *p;
887
888 assert(item);
889
890 p = item->argument;
891 if (p) {
892 if (*p == '+') {
893 mode = MODE_ADD;
894 p++;
895 } else if (*p == '-') {
896 mode = MODE_DEL;
897 p++;
898 } else if (*p == '=') {
899 mode = MODE_SET;
900 p++;
901 }
902 }
903
904 if (isempty(p) && mode != MODE_SET) {
905 log_error("Setting file attribute on '%s' needs an attribute specification.", item->path);
906 return -EINVAL;
907 }
908
909 for (; p && *p ; p++) {
910 unsigned i, v;
911
912 for (i = 0; i < ELEMENTSOF(attributes); i++)
913 if (*p == attributes[i].character)
914 break;
915
916 if (i >= ELEMENTSOF(attributes)) {
917 log_error("Unknown file attribute '%c' on '%s'.", *p, item->path);
918 return -EINVAL;
919 }
920
921 v = attributes[i].value;
922
923 SET_FLAG(value, v, (mode == MODE_ADD || mode == MODE_SET));
924
925 mask |= v;
926 }
927
928 if (mode == MODE_SET)
929 mask |= ATTRIBUTES_ALL;
930
931 assert(mask != 0);
932
933 item->attribute_mask = mask;
934 item->attribute_value = value;
935 item->attribute_set = true;
936
937 return 0;
938 }
939
940 static int path_set_attribute(Item *item, const char *path) {
941 _cleanup_close_ int fd = -1;
942 struct stat st;
943 unsigned f;
944 int r;
945
946 if (!item->attribute_set || item->attribute_mask == 0)
947 return 0;
948
949 fd = open(path, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOATIME|O_NOFOLLOW);
950 if (fd < 0) {
951 if (errno == ELOOP)
952 return log_error_errno(errno, "Skipping file attributes adjustment on symlink %s.", path);
953
954 return log_error_errno(errno, "Cannot open '%s': %m", path);
955 }
956
957 if (fstat(fd, &st) < 0)
958 return log_error_errno(errno, "Cannot stat '%s': %m", path);
959
960 /* Issuing the file attribute ioctls on device nodes is not
961 * safe, as that will be delivered to the drivers, not the
962 * file system containing the device node. */
963 if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode)) {
964 log_error("Setting file flags is only supported on regular files and directories, cannot set on '%s'.", path);
965 return -EINVAL;
966 }
967
968 f = item->attribute_value & item->attribute_mask;
969
970 /* Mask away directory-specific flags */
971 if (!S_ISDIR(st.st_mode))
972 f &= ~FS_DIRSYNC_FL;
973
974 r = chattr_fd(fd, f, item->attribute_mask);
975 if (r < 0)
976 log_full_errno(r == -ENOTTY || r == -EOPNOTSUPP ? LOG_DEBUG : LOG_WARNING,
977 r,
978 "Cannot set file attribute for '%s', value=0x%08x, mask=0x%08x: %m",
979 path, item->attribute_value, item->attribute_mask);
980
981 return 0;
982 }
983
984 static int write_one_file(Item *i, const char *path) {
985 _cleanup_close_ int fd = -1;
986 int flags, r = 0;
987 struct stat st;
988
989 assert(i);
990 assert(path);
991
992 flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND|O_NOFOLLOW :
993 i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC|O_NOFOLLOW : 0;
994
995 RUN_WITH_UMASK(0000) {
996 mac_selinux_create_file_prepare(path, S_IFREG);
997 fd = open(path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
998 mac_selinux_create_file_clear();
999 }
1000
1001 if (fd < 0) {
1002 if (i->type == WRITE_FILE && errno == ENOENT) {
1003 log_debug_errno(errno, "Not writing \"%s\": %m", path);
1004 return 0;
1005 }
1006
1007 r = -errno;
1008 if (!i->argument && errno == EROFS && stat(path, &st) == 0 &&
1009 (i->type == CREATE_FILE || st.st_size == 0))
1010 goto check_mode;
1011
1012 return log_error_errno(r, "Failed to create file %s: %m", path);
1013 }
1014
1015 if (i->argument) {
1016 _cleanup_free_ char *unescaped = NULL, *replaced = NULL;
1017
1018 log_debug("%s to \"%s\".", i->type == CREATE_FILE ? "Appending" : "Writing", path);
1019
1020 r = cunescape(i->argument, 0, &unescaped);
1021 if (r < 0)
1022 return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);
1023
1024 r = specifier_printf(unescaped, specifier_table, NULL, &replaced);
1025 if (r < 0)
1026 return log_error_errno(r, "Failed to replace specifiers in parameter to write '%s': %m", unescaped);
1027
1028 r = loop_write(fd, replaced, strlen(replaced), false);
1029 if (r < 0)
1030 return log_error_errno(r, "Failed to write file \"%s\": %m", path);
1031 } else
1032 log_debug("\"%s\" has been created.", path);
1033
1034 fd = safe_close(fd);
1035
1036 if (stat(path, &st) < 0)
1037 return log_error_errno(errno, "stat(%s) failed: %m", path);
1038
1039 check_mode:
1040 if (!S_ISREG(st.st_mode)) {
1041 log_error("%s is not a file.", path);
1042 return -EEXIST;
1043 }
1044
1045 r = path_set_perms(i, path);
1046 if (r < 0)
1047 return r;
1048
1049 return 0;
1050 }
1051
1052 typedef int (*action_t)(Item *, const char *);
1053
1054 static int item_do_children(Item *i, const char *path, action_t action) {
1055 _cleanup_closedir_ DIR *d;
1056 struct dirent *de;
1057 int r = 0;
1058
1059 assert(i);
1060 assert(path);
1061
1062 /* This returns the first error we run into, but nevertheless
1063 * tries to go on */
1064
1065 d = opendir_nomod(path);
1066 if (!d)
1067 return errno == ENOENT || errno == ENOTDIR ? 0 : -errno;
1068
1069 FOREACH_DIRENT_ALL(de, d, r = -errno) {
1070 _cleanup_free_ char *p = NULL;
1071 int q;
1072
1073 if (dot_or_dot_dot(de->d_name))
1074 continue;
1075
1076 p = strjoin(path, "/", de->d_name);
1077 if (!p)
1078 return -ENOMEM;
1079
1080 q = action(i, p);
1081 if (q < 0 && q != -ENOENT && r == 0)
1082 r = q;
1083
1084 if (IN_SET(de->d_type, DT_UNKNOWN, DT_DIR)) {
1085 q = item_do_children(i, p, action);
1086 if (q < 0 && r == 0)
1087 r = q;
1088 }
1089 }
1090
1091 return r;
1092 }
1093
1094 static int glob_item(Item *i, action_t action, bool recursive) {
1095 _cleanup_globfree_ glob_t g = {
1096 .gl_opendir = (void *(*)(const char *)) opendir_nomod,
1097 };
1098 int r = 0, k;
1099 char **fn;
1100
1101 k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
1102 if (k < 0 && k != -ENOENT)
1103 return log_error_errno(k, "glob(%s) failed: %m", i->path);
1104
1105 STRV_FOREACH(fn, g.gl_pathv) {
1106 k = action(i, *fn);
1107 if (k < 0 && r == 0)
1108 r = k;
1109
1110 if (recursive) {
1111 k = item_do_children(i, *fn, action);
1112 if (k < 0 && r == 0)
1113 r = k;
1114 }
1115 }
1116
1117 return r;
1118 }
1119
1120 typedef enum {
1121 CREATION_NORMAL,
1122 CREATION_EXISTING,
1123 CREATION_FORCE,
1124 _CREATION_MODE_MAX,
1125 _CREATION_MODE_INVALID = -1
1126 } CreationMode;
1127
1128 static const char *creation_mode_verb_table[_CREATION_MODE_MAX] = {
1129 [CREATION_NORMAL] = "Created",
1130 [CREATION_EXISTING] = "Found existing",
1131 [CREATION_FORCE] = "Created replacement",
1132 };
1133
1134 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);
1135
1136 static int create_item(Item *i) {
1137 _cleanup_free_ char *resolved = NULL;
1138 struct stat st;
1139 int r = 0;
1140 int q = 0;
1141 CreationMode creation;
1142
1143 assert(i);
1144
1145 log_debug("Running create action for entry %c %s", (char) i->type, i->path);
1146
1147 switch (i->type) {
1148
1149 case IGNORE_PATH:
1150 case IGNORE_DIRECTORY_PATH:
1151 case REMOVE_PATH:
1152 case RECURSIVE_REMOVE_PATH:
1153 return 0;
1154
1155 case CREATE_FILE:
1156 case TRUNCATE_FILE:
1157 r = write_one_file(i, i->path);
1158 if (r < 0)
1159 return r;
1160 break;
1161
1162 case COPY_FILES: {
1163 r = specifier_printf(i->argument, specifier_table, NULL, &resolved);
1164 if (r < 0)
1165 return log_error_errno(r, "Failed to substitute specifiers in copy source %s: %m", i->argument);
1166
1167 log_debug("Copying tree \"%s\" to \"%s\".", resolved, i->path);
1168 r = copy_tree(resolved, i->path, i->uid_set ? i->uid : UID_INVALID, i->gid_set ? i->gid : GID_INVALID, COPY_REFLINK);
1169
1170 if (r == -EROFS && stat(i->path, &st) == 0)
1171 r = -EEXIST;
1172
1173 if (r < 0) {
1174 struct stat a, b;
1175
1176 if (r != -EEXIST)
1177 return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
1178
1179 if (stat(resolved, &a) < 0)
1180 return log_error_errno(errno, "stat(%s) failed: %m", resolved);
1181
1182 if (stat(i->path, &b) < 0)
1183 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1184
1185 if ((a.st_mode ^ b.st_mode) & S_IFMT) {
1186 log_debug("Can't copy to %s, file exists already and is of different type", i->path);
1187 return 0;
1188 }
1189 }
1190
1191 r = path_set_perms(i, i->path);
1192 if (r < 0)
1193 return r;
1194
1195 break;
1196
1197 case WRITE_FILE:
1198 r = glob_item(i, write_one_file, false);
1199 if (r < 0)
1200 return r;
1201
1202 break;
1203
1204 case CREATE_DIRECTORY:
1205 case TRUNCATE_DIRECTORY:
1206 case CREATE_SUBVOLUME:
1207 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1208 case CREATE_SUBVOLUME_NEW_QUOTA:
1209 RUN_WITH_UMASK(0000)
1210 mkdir_parents_label(i->path, 0755);
1211
1212 if (IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) {
1213
1214 if (btrfs_is_subvol(isempty(arg_root) ? "/" : arg_root) <= 0)
1215
1216 /* Don't create a subvolume unless the
1217 * root directory is one, too. We do
1218 * this under the assumption that if
1219 * the root directory is just a plain
1220 * directory (i.e. very light-weight),
1221 * we shouldn't try to split it up
1222 * into subvolumes (i.e. more
1223 * heavy-weight). Thus, chroot()
1224 * environments and suchlike will get
1225 * a full brtfs subvolume set up below
1226 * their tree only if they
1227 * specifically set up a btrfs
1228 * subvolume for the root dir too. */
1229
1230 r = -ENOTTY;
1231 else {
1232 RUN_WITH_UMASK((~i->mode) & 0777)
1233 r = btrfs_subvol_make(i->path);
1234 }
1235 } else
1236 r = 0;
1237
1238 if (IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY) || r == -ENOTTY)
1239 RUN_WITH_UMASK(0000)
1240 r = mkdir_label(i->path, i->mode);
1241
1242 if (r < 0) {
1243 int k;
1244
1245 if (r != -EEXIST && r != -EROFS)
1246 return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", i->path);
1247
1248 k = is_dir(i->path, false);
1249 if (k == -ENOENT && r == -EROFS)
1250 return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", i->path);
1251 if (k < 0)
1252 return log_error_errno(k, "Failed to check if %s exists: %m", i->path);
1253 if (!k) {
1254 log_warning("\"%s\" already exists and is not a directory.", i->path);
1255 return 0;
1256 }
1257
1258 creation = CREATION_EXISTING;
1259 } else
1260 creation = CREATION_NORMAL;
1261
1262 log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), i->path);
1263
1264 if (IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
1265 r = btrfs_subvol_auto_qgroup(i->path, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
1266 if (r == -ENOTTY)
1267 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
1268 else if (r == -EROFS)
1269 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
1270 else if (r == -ENOPROTOOPT)
1271 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
1272 else if (r < 0)
1273 q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
1274 else if (r > 0)
1275 log_debug("Adjusted quota for subvolume \"%s\".", i->path);
1276 else if (r == 0)
1277 log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
1278 }
1279
1280 /* fall through */
1281
1282 case EMPTY_DIRECTORY:
1283 r = path_set_perms(i, i->path);
1284 if (q < 0)
1285 return q;
1286 if (r < 0)
1287 return r;
1288
1289 break;
1290
1291 case CREATE_FIFO:
1292 RUN_WITH_UMASK(0000) {
1293 mac_selinux_create_file_prepare(i->path, S_IFIFO);
1294 r = mkfifo(i->path, i->mode);
1295 mac_selinux_create_file_clear();
1296 }
1297
1298 if (r < 0) {
1299 if (errno != EEXIST)
1300 return log_error_errno(errno, "Failed to create fifo %s: %m", i->path);
1301
1302 if (lstat(i->path, &st) < 0)
1303 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1304
1305 if (!S_ISFIFO(st.st_mode)) {
1306
1307 if (i->force) {
1308 RUN_WITH_UMASK(0000) {
1309 mac_selinux_create_file_prepare(i->path, S_IFIFO);
1310 r = mkfifo_atomic(i->path, i->mode);
1311 mac_selinux_create_file_clear();
1312 }
1313
1314 if (r < 0)
1315 return log_error_errno(r, "Failed to create fifo %s: %m", i->path);
1316 creation = CREATION_FORCE;
1317 } else {
1318 log_warning("\"%s\" already exists and is not a fifo.", i->path);
1319 return 0;
1320 }
1321 } else
1322 creation = CREATION_EXISTING;
1323 } else
1324 creation = CREATION_NORMAL;
1325 log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), i->path);
1326
1327 r = path_set_perms(i, i->path);
1328 if (r < 0)
1329 return r;
1330
1331 break;
1332 }
1333
1334 case CREATE_SYMLINK: {
1335 r = specifier_printf(i->argument, specifier_table, NULL, &resolved);
1336 if (r < 0)
1337 return log_error_errno(r, "Failed to substitute specifiers in symlink target %s: %m", i->argument);
1338
1339 mac_selinux_create_file_prepare(i->path, S_IFLNK);
1340 r = symlink(resolved, i->path);
1341 mac_selinux_create_file_clear();
1342
1343 if (r < 0) {
1344 _cleanup_free_ char *x = NULL;
1345
1346 if (errno != EEXIST)
1347 return log_error_errno(errno, "symlink(%s, %s) failed: %m", resolved, i->path);
1348
1349 r = readlink_malloc(i->path, &x);
1350 if (r < 0 || !streq(resolved, x)) {
1351
1352 if (i->force) {
1353 mac_selinux_create_file_prepare(i->path, S_IFLNK);
1354 r = symlink_atomic(resolved, i->path);
1355 mac_selinux_create_file_clear();
1356
1357 if (r < 0)
1358 return log_error_errno(r, "symlink(%s, %s) failed: %m", resolved, i->path);
1359
1360 creation = CREATION_FORCE;
1361 } else {
1362 log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);
1363 return 0;
1364 }
1365 } else
1366 creation = CREATION_EXISTING;
1367 } else
1368
1369 creation = CREATION_NORMAL;
1370 log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);
1371 break;
1372 }
1373
1374 case CREATE_BLOCK_DEVICE:
1375 case CREATE_CHAR_DEVICE: {
1376 mode_t file_type;
1377
1378 if (have_effective_cap(CAP_MKNOD) == 0) {
1379 /* In a container we lack CAP_MKNOD. We
1380 shouldn't attempt to create the device node in
1381 that case to avoid noise, and we don't support
1382 virtualized devices in containers anyway. */
1383
1384 log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);
1385 return 0;
1386 }
1387
1388 file_type = i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR;
1389
1390 RUN_WITH_UMASK(0000) {
1391 mac_selinux_create_file_prepare(i->path, file_type);
1392 r = mknod(i->path, i->mode | file_type, i->major_minor);
1393 mac_selinux_create_file_clear();
1394 }
1395
1396 if (r < 0) {
1397 if (errno == EPERM) {
1398 log_debug("We lack permissions, possibly because of cgroup configuration; "
1399 "skipping creation of device node %s.", i->path);
1400 return 0;
1401 }
1402
1403 if (errno != EEXIST)
1404 return log_error_errno(errno, "Failed to create device node %s: %m", i->path);
1405
1406 if (lstat(i->path, &st) < 0)
1407 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1408
1409 if ((st.st_mode & S_IFMT) != file_type) {
1410
1411 if (i->force) {
1412
1413 RUN_WITH_UMASK(0000) {
1414 mac_selinux_create_file_prepare(i->path, file_type);
1415 r = mknod_atomic(i->path, i->mode | file_type, i->major_minor);
1416 mac_selinux_create_file_clear();
1417 }
1418
1419 if (r < 0)
1420 return log_error_errno(r, "Failed to create device node \"%s\": %m", i->path);
1421 creation = CREATION_FORCE;
1422 } else {
1423 log_debug("%s is not a device node.", i->path);
1424 return 0;
1425 }
1426 } else
1427 creation = CREATION_EXISTING;
1428 } else
1429 creation = CREATION_NORMAL;
1430
1431 log_debug("%s %s device node \"%s\" %u:%u.",
1432 creation_mode_verb_to_string(creation),
1433 i->type == CREATE_BLOCK_DEVICE ? "block" : "char",
1434 i->path, major(i->mode), minor(i->mode));
1435
1436 r = path_set_perms(i, i->path);
1437 if (r < 0)
1438 return r;
1439
1440 break;
1441 }
1442
1443 case ADJUST_MODE:
1444 case RELABEL_PATH:
1445 r = glob_item(i, path_set_perms, false);
1446 if (r < 0)
1447 return r;
1448 break;
1449
1450 case RECURSIVE_RELABEL_PATH:
1451 r = glob_item(i, path_set_perms, true);
1452 if (r < 0)
1453 return r;
1454 break;
1455
1456 case SET_XATTR:
1457 r = glob_item(i, path_set_xattrs, false);
1458 if (r < 0)
1459 return r;
1460 break;
1461
1462 case RECURSIVE_SET_XATTR:
1463 r = glob_item(i, path_set_xattrs, true);
1464 if (r < 0)
1465 return r;
1466 break;
1467
1468 case SET_ACL:
1469 r = glob_item(i, path_set_acls, false);
1470 if (r < 0)
1471 return r;
1472 break;
1473
1474 case RECURSIVE_SET_ACL:
1475 r = glob_item(i, path_set_acls, true);
1476 if (r < 0)
1477 return r;
1478 break;
1479
1480 case SET_ATTRIBUTE:
1481 r = glob_item(i, path_set_attribute, false);
1482 if (r < 0)
1483 return r;
1484 break;
1485
1486 case RECURSIVE_SET_ATTRIBUTE:
1487 r = glob_item(i, path_set_attribute, true);
1488 if (r < 0)
1489 return r;
1490 break;
1491 }
1492
1493 return 0;
1494 }
1495
1496 static int remove_item_instance(Item *i, const char *instance) {
1497 int r;
1498
1499 assert(i);
1500
1501 switch (i->type) {
1502
1503 case REMOVE_PATH:
1504 if (remove(instance) < 0 && errno != ENOENT)
1505 return log_error_errno(errno, "rm(%s): %m", instance);
1506
1507 break;
1508
1509 case TRUNCATE_DIRECTORY:
1510 case RECURSIVE_REMOVE_PATH:
1511 /* FIXME: we probably should use dir_cleanup() here
1512 * instead of rm_rf() so that 'x' is honoured. */
1513 log_debug("rm -rf \"%s\"", instance);
1514 r = rm_rf(instance, (i->type == RECURSIVE_REMOVE_PATH ? REMOVE_ROOT|REMOVE_SUBVOLUME : 0) | REMOVE_PHYSICAL);
1515 if (r < 0 && r != -ENOENT)
1516 return log_error_errno(r, "rm_rf(%s): %m", instance);
1517
1518 break;
1519
1520 default:
1521 assert_not_reached("wut?");
1522 }
1523
1524 return 0;
1525 }
1526
1527 static int remove_item(Item *i) {
1528 assert(i);
1529
1530 log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
1531
1532 switch (i->type) {
1533
1534 case REMOVE_PATH:
1535 case TRUNCATE_DIRECTORY:
1536 case RECURSIVE_REMOVE_PATH:
1537 return glob_item(i, remove_item_instance, false);
1538
1539 default:
1540 return 0;
1541 }
1542 }
1543
1544 static int clean_item_instance(Item *i, const char* instance) {
1545 _cleanup_closedir_ DIR *d = NULL;
1546 struct stat s, ps;
1547 bool mountpoint;
1548 usec_t cutoff, n;
1549 char timestamp[FORMAT_TIMESTAMP_MAX];
1550
1551 assert(i);
1552
1553 if (!i->age_set)
1554 return 0;
1555
1556 n = now(CLOCK_REALTIME);
1557 if (n < i->age)
1558 return 0;
1559
1560 cutoff = n - i->age;
1561
1562 d = opendir_nomod(instance);
1563 if (!d) {
1564 if (IN_SET(errno, ENOENT, ENOTDIR)) {
1565 log_debug_errno(errno, "Directory \"%s\": %m", instance);
1566 return 0;
1567 }
1568
1569 return log_error_errno(errno, "Failed to open directory %s: %m", instance);
1570 }
1571
1572 if (fstat(dirfd(d), &s) < 0)
1573 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1574
1575 if (!S_ISDIR(s.st_mode)) {
1576 log_error("%s is not a directory.", i->path);
1577 return -ENOTDIR;
1578 }
1579
1580 if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
1581 return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
1582
1583 mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino;
1584
1585 log_debug("Cleanup threshold for %s \"%s\" is %s",
1586 mountpoint ? "mount point" : "directory",
1587 instance,
1588 format_timestamp_us(timestamp, sizeof(timestamp), cutoff));
1589
1590 return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,
1591 MAX_DEPTH, i->keep_first_level);
1592 }
1593
1594 static int clean_item(Item *i) {
1595 assert(i);
1596
1597 log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
1598
1599 switch (i->type) {
1600 case CREATE_DIRECTORY:
1601 case CREATE_SUBVOLUME:
1602 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1603 case CREATE_SUBVOLUME_NEW_QUOTA:
1604 case EMPTY_DIRECTORY:
1605 case TRUNCATE_DIRECTORY:
1606 case IGNORE_PATH:
1607 case COPY_FILES:
1608 clean_item_instance(i, i->path);
1609 return 0;
1610 case IGNORE_DIRECTORY_PATH:
1611 return glob_item(i, clean_item_instance, false);
1612 default:
1613 return 0;
1614 }
1615 }
1616
1617 static int process_item_array(ItemArray *array);
1618
1619 static int process_item(Item *i) {
1620 int r, q, p, t = 0;
1621 _cleanup_free_ char *prefix = NULL;
1622
1623 assert(i);
1624
1625 if (i->done)
1626 return 0;
1627
1628 i->done = true;
1629
1630 prefix = malloc(strlen(i->path) + 1);
1631 if (!prefix)
1632 return log_oom();
1633
1634 PATH_FOREACH_PREFIX(prefix, i->path) {
1635 ItemArray *j;
1636
1637 j = ordered_hashmap_get(items, prefix);
1638 if (j) {
1639 int s;
1640
1641 s = process_item_array(j);
1642 if (s < 0 && t == 0)
1643 t = s;
1644 }
1645 }
1646
1647 r = arg_create ? create_item(i) : 0;
1648 q = arg_remove ? remove_item(i) : 0;
1649 p = arg_clean ? clean_item(i) : 0;
1650
1651 return t < 0 ? t :
1652 r < 0 ? r :
1653 q < 0 ? q :
1654 p;
1655 }
1656
1657 static int process_item_array(ItemArray *array) {
1658 unsigned n;
1659 int r = 0, k;
1660
1661 assert(array);
1662
1663 for (n = 0; n < array->count; n++) {
1664 k = process_item(array->items + n);
1665 if (k < 0 && r == 0)
1666 r = k;
1667 }
1668
1669 return r;
1670 }
1671
1672 static void item_free_contents(Item *i) {
1673 assert(i);
1674 free(i->path);
1675 free(i->argument);
1676 strv_free(i->xattrs);
1677
1678 #ifdef HAVE_ACL
1679 acl_free(i->acl_access);
1680 acl_free(i->acl_default);
1681 #endif
1682 }
1683
1684 static void item_array_free(ItemArray *a) {
1685 unsigned n;
1686
1687 if (!a)
1688 return;
1689
1690 for (n = 0; n < a->count; n++)
1691 item_free_contents(a->items + n);
1692 free(a->items);
1693 free(a);
1694 }
1695
1696 static int item_compare(const void *a, const void *b) {
1697 const Item *x = a, *y = b;
1698
1699 /* Make sure that the ownership taking item is put first, so
1700 * that we first create the node, and then can adjust it */
1701
1702 if (takes_ownership(x->type) && !takes_ownership(y->type))
1703 return -1;
1704 if (!takes_ownership(x->type) && takes_ownership(y->type))
1705 return 1;
1706
1707 return (int) x->type - (int) y->type;
1708 }
1709
1710 static bool item_compatible(Item *a, Item *b) {
1711 assert(a);
1712 assert(b);
1713 assert(streq(a->path, b->path));
1714
1715 if (takes_ownership(a->type) && takes_ownership(b->type))
1716 /* check if the items are the same */
1717 return streq_ptr(a->argument, b->argument) &&
1718
1719 a->uid_set == b->uid_set &&
1720 a->uid == b->uid &&
1721
1722 a->gid_set == b->gid_set &&
1723 a->gid == b->gid &&
1724
1725 a->mode_set == b->mode_set &&
1726 a->mode == b->mode &&
1727
1728 a->age_set == b->age_set &&
1729 a->age == b->age &&
1730
1731 a->mask_perms == b->mask_perms &&
1732
1733 a->keep_first_level == b->keep_first_level &&
1734
1735 a->major_minor == b->major_minor;
1736
1737 return true;
1738 }
1739
1740 static bool should_include_path(const char *path) {
1741 char **prefix;
1742
1743 STRV_FOREACH(prefix, arg_exclude_prefixes)
1744 if (path_startswith(path, *prefix)) {
1745 log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
1746 path, *prefix);
1747 return false;
1748 }
1749
1750 STRV_FOREACH(prefix, arg_include_prefixes)
1751 if (path_startswith(path, *prefix)) {
1752 log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
1753 return true;
1754 }
1755
1756 /* no matches, so we should include this path only if we
1757 * have no whitelist at all */
1758 if (strv_length(arg_include_prefixes) == 0)
1759 return true;
1760
1761 log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
1762 return false;
1763 }
1764
1765 static int parse_line(const char *fname, unsigned line, const char *buffer) {
1766
1767 _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
1768 _cleanup_(item_free_contents) Item i = {};
1769 ItemArray *existing;
1770 OrderedHashmap *h;
1771 int r, pos;
1772 bool force = false, boot = false;
1773
1774 assert(fname);
1775 assert(line >= 1);
1776 assert(buffer);
1777
1778 r = extract_many_words(
1779 &buffer,
1780 NULL,
1781 EXTRACT_QUOTES,
1782 &action,
1783 &path,
1784 &mode,
1785 &user,
1786 &group,
1787 &age,
1788 NULL);
1789 if (r < 0)
1790 return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
1791 else if (r < 2) {
1792 log_error("[%s:%u] Syntax error.", fname, line);
1793 return -EIO;
1794 }
1795
1796 if (!isempty(buffer) && !streq(buffer, "-")) {
1797 i.argument = strdup(buffer);
1798 if (!i.argument)
1799 return log_oom();
1800 }
1801
1802 if (isempty(action)) {
1803 log_error("[%s:%u] Command too short '%s'.", fname, line, action);
1804 return -EINVAL;
1805 }
1806
1807 for (pos = 1; action[pos]; pos++) {
1808 if (action[pos] == '!' && !boot)
1809 boot = true;
1810 else if (action[pos] == '+' && !force)
1811 force = true;
1812 else {
1813 log_error("[%s:%u] Unknown modifiers in command '%s'",
1814 fname, line, action);
1815 return -EINVAL;
1816 }
1817 }
1818
1819 if (boot && !arg_boot) {
1820 log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",
1821 action, path);
1822 return 0;
1823 }
1824
1825 i.type = action[0];
1826 i.force = force;
1827
1828 r = specifier_printf(path, specifier_table, NULL, &i.path);
1829 if (r < 0) {
1830 log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, path);
1831 return r;
1832 }
1833
1834 switch (i.type) {
1835
1836 case CREATE_DIRECTORY:
1837 case CREATE_SUBVOLUME:
1838 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1839 case CREATE_SUBVOLUME_NEW_QUOTA:
1840 case EMPTY_DIRECTORY:
1841 case TRUNCATE_DIRECTORY:
1842 case CREATE_FIFO:
1843 case IGNORE_PATH:
1844 case IGNORE_DIRECTORY_PATH:
1845 case REMOVE_PATH:
1846 case RECURSIVE_REMOVE_PATH:
1847 case ADJUST_MODE:
1848 case RELABEL_PATH:
1849 case RECURSIVE_RELABEL_PATH:
1850 if (i.argument)
1851 log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
1852
1853 break;
1854
1855 case CREATE_FILE:
1856 case TRUNCATE_FILE:
1857 break;
1858
1859 case CREATE_SYMLINK:
1860 if (!i.argument) {
1861 i.argument = strappend("/usr/share/factory/", i.path);
1862 if (!i.argument)
1863 return log_oom();
1864 }
1865 break;
1866
1867 case WRITE_FILE:
1868 if (!i.argument) {
1869 log_error("[%s:%u] Write file requires argument.", fname, line);
1870 return -EBADMSG;
1871 }
1872 break;
1873
1874 case COPY_FILES:
1875 if (!i.argument) {
1876 i.argument = strappend("/usr/share/factory/", i.path);
1877 if (!i.argument)
1878 return log_oom();
1879 } else if (!path_is_absolute(i.argument)) {
1880 log_error("[%s:%u] Source path is not absolute.", fname, line);
1881 return -EBADMSG;
1882 }
1883
1884 path_kill_slashes(i.argument);
1885 break;
1886
1887 case CREATE_CHAR_DEVICE:
1888 case CREATE_BLOCK_DEVICE: {
1889 unsigned major, minor;
1890
1891 if (!i.argument) {
1892 log_error("[%s:%u] Device file requires argument.", fname, line);
1893 return -EBADMSG;
1894 }
1895
1896 if (sscanf(i.argument, "%u:%u", &major, &minor) != 2) {
1897 log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
1898 return -EBADMSG;
1899 }
1900
1901 i.major_minor = makedev(major, minor);
1902 break;
1903 }
1904
1905 case SET_XATTR:
1906 case RECURSIVE_SET_XATTR:
1907 if (!i.argument) {
1908 log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
1909 return -EBADMSG;
1910 }
1911 r = parse_xattrs_from_arg(&i);
1912 if (r < 0)
1913 return r;
1914 break;
1915
1916 case SET_ACL:
1917 case RECURSIVE_SET_ACL:
1918 if (!i.argument) {
1919 log_error("[%s:%u] Set ACLs requires argument.", fname, line);
1920 return -EBADMSG;
1921 }
1922 r = parse_acls_from_arg(&i);
1923 if (r < 0)
1924 return r;
1925 break;
1926
1927 case SET_ATTRIBUTE:
1928 case RECURSIVE_SET_ATTRIBUTE:
1929 if (!i.argument) {
1930 log_error("[%s:%u] Set file attribute requires argument.", fname, line);
1931 return -EBADMSG;
1932 }
1933 r = parse_attribute_from_arg(&i);
1934 if (r < 0)
1935 return r;
1936 break;
1937
1938 default:
1939 log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
1940 return -EBADMSG;
1941 }
1942
1943 if (!path_is_absolute(i.path)) {
1944 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
1945 return -EBADMSG;
1946 }
1947
1948 path_kill_slashes(i.path);
1949
1950 if (!should_include_path(i.path))
1951 return 0;
1952
1953 if (arg_root) {
1954 char *p;
1955
1956 p = prefix_root(arg_root, i.path);
1957 if (!p)
1958 return log_oom();
1959
1960 free(i.path);
1961 i.path = p;
1962 }
1963
1964 if (!isempty(user) && !streq(user, "-")) {
1965 const char *u = user;
1966
1967 r = get_user_creds(&u, &i.uid, NULL, NULL, NULL);
1968 if (r < 0) {
1969 log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
1970 return r;
1971 }
1972
1973 i.uid_set = true;
1974 }
1975
1976 if (!isempty(group) && !streq(group, "-")) {
1977 const char *g = group;
1978
1979 r = get_group_creds(&g, &i.gid);
1980 if (r < 0) {
1981 log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
1982 return r;
1983 }
1984
1985 i.gid_set = true;
1986 }
1987
1988 if (!isempty(mode) && !streq(mode, "-")) {
1989 const char *mm = mode;
1990 unsigned m;
1991
1992 if (*mm == '~') {
1993 i.mask_perms = true;
1994 mm++;
1995 }
1996
1997 if (parse_mode(mm, &m) < 0) {
1998 log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
1999 return -EBADMSG;
2000 }
2001
2002 i.mode = m;
2003 i.mode_set = true;
2004 } else
2005 i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
2006
2007 if (!isempty(age) && !streq(age, "-")) {
2008 const char *a = age;
2009
2010 if (*a == '~') {
2011 i.keep_first_level = true;
2012 a++;
2013 }
2014
2015 if (parse_sec(a, &i.age) < 0) {
2016 log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
2017 return -EBADMSG;
2018 }
2019
2020 i.age_set = true;
2021 }
2022
2023 h = needs_glob(i.type) ? globs : items;
2024
2025 existing = ordered_hashmap_get(h, i.path);
2026 if (existing) {
2027 unsigned n;
2028
2029 for (n = 0; n < existing->count; n++) {
2030 if (!item_compatible(existing->items + n, &i)) {
2031 log_warning("[%s:%u] Duplicate line for path \"%s\", ignoring.",
2032 fname, line, i.path);
2033 return 0;
2034 }
2035 }
2036 } else {
2037 existing = new0(ItemArray, 1);
2038 r = ordered_hashmap_put(h, i.path, existing);
2039 if (r < 0)
2040 return log_oom();
2041 }
2042
2043 if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1))
2044 return log_oom();
2045
2046 memcpy(existing->items + existing->count++, &i, sizeof(i));
2047
2048 /* Sort item array, to enforce stable ordering of application */
2049 qsort_safe(existing->items, existing->count, sizeof(Item), item_compare);
2050
2051 zero(i);
2052 return 0;
2053 }
2054
2055 static void help(void) {
2056 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
2057 "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
2058 " -h --help Show this help\n"
2059 " --version Show package version\n"
2060 " --create Create marked files/directories\n"
2061 " --clean Clean up marked directories\n"
2062 " --remove Remove marked files/directories\n"
2063 " --boot Execute actions only safe at boot\n"
2064 " --prefix=PATH Only apply rules with the specified prefix\n"
2065 " --exclude-prefix=PATH Ignore rules with the specified prefix\n"
2066 " --root=PATH Operate on an alternate filesystem root\n",
2067 program_invocation_short_name);
2068 }
2069
2070 static int parse_argv(int argc, char *argv[]) {
2071
2072 enum {
2073 ARG_VERSION = 0x100,
2074 ARG_CREATE,
2075 ARG_CLEAN,
2076 ARG_REMOVE,
2077 ARG_BOOT,
2078 ARG_PREFIX,
2079 ARG_EXCLUDE_PREFIX,
2080 ARG_ROOT,
2081 };
2082
2083 static const struct option options[] = {
2084 { "help", no_argument, NULL, 'h' },
2085 { "version", no_argument, NULL, ARG_VERSION },
2086 { "create", no_argument, NULL, ARG_CREATE },
2087 { "clean", no_argument, NULL, ARG_CLEAN },
2088 { "remove", no_argument, NULL, ARG_REMOVE },
2089 { "boot", no_argument, NULL, ARG_BOOT },
2090 { "prefix", required_argument, NULL, ARG_PREFIX },
2091 { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
2092 { "root", required_argument, NULL, ARG_ROOT },
2093 {}
2094 };
2095
2096 int c, r;
2097
2098 assert(argc >= 0);
2099 assert(argv);
2100
2101 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
2102
2103 switch (c) {
2104
2105 case 'h':
2106 help();
2107 return 0;
2108
2109 case ARG_VERSION:
2110 return version();
2111
2112 case ARG_CREATE:
2113 arg_create = true;
2114 break;
2115
2116 case ARG_CLEAN:
2117 arg_clean = true;
2118 break;
2119
2120 case ARG_REMOVE:
2121 arg_remove = true;
2122 break;
2123
2124 case ARG_BOOT:
2125 arg_boot = true;
2126 break;
2127
2128 case ARG_PREFIX:
2129 if (strv_push(&arg_include_prefixes, optarg) < 0)
2130 return log_oom();
2131 break;
2132
2133 case ARG_EXCLUDE_PREFIX:
2134 if (strv_push(&arg_exclude_prefixes, optarg) < 0)
2135 return log_oom();
2136 break;
2137
2138 case ARG_ROOT:
2139 r = parse_path_argument_and_warn(optarg, true, &arg_root);
2140 if (r < 0)
2141 return r;
2142 break;
2143
2144 case '?':
2145 return -EINVAL;
2146
2147 default:
2148 assert_not_reached("Unhandled option");
2149 }
2150
2151 if (!arg_clean && !arg_create && !arg_remove) {
2152 log_error("You need to specify at least one of --clean, --create or --remove.");
2153 return -EINVAL;
2154 }
2155
2156 return 1;
2157 }
2158
2159 static int read_config_file(const char *fn, bool ignore_enoent) {
2160 _cleanup_fclose_ FILE *_f = NULL;
2161 FILE *f;
2162 char line[LINE_MAX];
2163 Iterator iterator;
2164 unsigned v = 0;
2165 Item *i;
2166 int r = 0;
2167
2168 assert(fn);
2169
2170 if (streq(fn, "-")) {
2171 log_debug("Reading config from stdin.");
2172 fn = "<stdin>";
2173 f = stdin;
2174 } else {
2175 r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &_f);
2176 if (r < 0) {
2177 if (ignore_enoent && r == -ENOENT) {
2178 log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
2179 return 0;
2180 }
2181
2182 return log_error_errno(r, "Failed to open '%s': %m", fn);
2183 }
2184 log_debug("Reading config file \"%s\".", fn);
2185 f = _f;
2186 }
2187
2188 FOREACH_LINE(line, f, break) {
2189 char *l;
2190 int k;
2191
2192 v++;
2193
2194 l = strstrip(line);
2195 if (*l == '#' || *l == 0)
2196 continue;
2197
2198 k = parse_line(fn, v, l);
2199 if (k < 0 && r == 0)
2200 r = k;
2201 }
2202
2203 /* we have to determine age parameter for each entry of type X */
2204 ORDERED_HASHMAP_FOREACH(i, globs, iterator) {
2205 Iterator iter;
2206 Item *j, *candidate_item = NULL;
2207
2208 if (i->type != IGNORE_DIRECTORY_PATH)
2209 continue;
2210
2211 ORDERED_HASHMAP_FOREACH(j, items, iter) {
2212 if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))
2213 continue;
2214
2215 if (path_equal(j->path, i->path)) {
2216 candidate_item = j;
2217 break;
2218 }
2219
2220 if ((!candidate_item && path_startswith(i->path, j->path)) ||
2221 (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
2222 candidate_item = j;
2223 }
2224
2225 if (candidate_item && candidate_item->age_set) {
2226 i->age = candidate_item->age;
2227 i->age_set = true;
2228 }
2229 }
2230
2231 if (ferror(f)) {
2232 log_error_errno(errno, "Failed to read from file %s: %m", fn);
2233 if (r == 0)
2234 r = -EIO;
2235 }
2236
2237 return r;
2238 }
2239
2240 int main(int argc, char *argv[]) {
2241 int r, k;
2242 ItemArray *a;
2243 Iterator iterator;
2244
2245 r = parse_argv(argc, argv);
2246 if (r <= 0)
2247 goto finish;
2248
2249 log_set_target(LOG_TARGET_AUTO);
2250 log_parse_environment();
2251 log_open();
2252
2253 umask(0022);
2254
2255 mac_selinux_init();
2256
2257 items = ordered_hashmap_new(&string_hash_ops);
2258 globs = ordered_hashmap_new(&string_hash_ops);
2259
2260 if (!items || !globs) {
2261 r = log_oom();
2262 goto finish;
2263 }
2264
2265 r = 0;
2266
2267 if (optind < argc) {
2268 int j;
2269
2270 for (j = optind; j < argc; j++) {
2271 k = read_config_file(argv[j], false);
2272 if (k < 0 && r == 0)
2273 r = k;
2274 }
2275
2276 } else {
2277 _cleanup_strv_free_ char **files = NULL;
2278 char **f;
2279
2280 r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs);
2281 if (r < 0) {
2282 log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m");
2283 goto finish;
2284 }
2285
2286 STRV_FOREACH(f, files) {
2287 k = read_config_file(*f, true);
2288 if (k < 0 && r == 0)
2289 r = k;
2290 }
2291 }
2292
2293 /* The non-globbing ones usually create things, hence we apply
2294 * them first */
2295 ORDERED_HASHMAP_FOREACH(a, items, iterator) {
2296 k = process_item_array(a);
2297 if (k < 0 && r == 0)
2298 r = k;
2299 }
2300
2301 /* The globbing ones usually alter things, hence we apply them
2302 * second. */
2303 ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
2304 k = process_item_array(a);
2305 if (k < 0 && r == 0)
2306 r = k;
2307 }
2308
2309 finish:
2310 while ((a = ordered_hashmap_steal_first(items)))
2311 item_array_free(a);
2312
2313 while ((a = ordered_hashmap_steal_first(globs)))
2314 item_array_free(a);
2315
2316 ordered_hashmap_free(items);
2317 ordered_hashmap_free(globs);
2318
2319 free(arg_include_prefixes);
2320 free(arg_exclude_prefixes);
2321 free(arg_root);
2322
2323 set_free_free(unix_sockets);
2324
2325 mac_selinux_finish();
2326
2327 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
2328 }
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