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Merge pull request #5202 from keszybz/cgls-units
[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 ? 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_closedir = (void (*)(void *)) closedir,
1097 .gl_readdir = (struct dirent *(*)(void *)) readdir,
1098 .gl_opendir = (void *(*)(const char *)) opendir_nomod,
1099 .gl_lstat = lstat,
1100 .gl_stat = stat,
1101 };
1102 int r = 0, k;
1103 char **fn;
1104
1105 errno = 0;
1106 k = glob(i->path, GLOB_NOSORT|GLOB_BRACE|GLOB_ALTDIRFUNC, NULL, &g);
1107 if (k != 0 && k != GLOB_NOMATCH)
1108 return log_error_errno(errno ?: EIO, "glob(%s) failed: %m", i->path);
1109
1110 STRV_FOREACH(fn, g.gl_pathv) {
1111 k = action(i, *fn);
1112 if (k < 0 && r == 0)
1113 r = k;
1114
1115 if (recursive) {
1116 k = item_do_children(i, *fn, action);
1117 if (k < 0 && r == 0)
1118 r = k;
1119 }
1120 }
1121
1122 return r;
1123 }
1124
1125 typedef enum {
1126 CREATION_NORMAL,
1127 CREATION_EXISTING,
1128 CREATION_FORCE,
1129 _CREATION_MODE_MAX,
1130 _CREATION_MODE_INVALID = -1
1131 } CreationMode;
1132
1133 static const char *creation_mode_verb_table[_CREATION_MODE_MAX] = {
1134 [CREATION_NORMAL] = "Created",
1135 [CREATION_EXISTING] = "Found existing",
1136 [CREATION_FORCE] = "Created replacement",
1137 };
1138
1139 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);
1140
1141 static int create_item(Item *i) {
1142 _cleanup_free_ char *resolved = NULL;
1143 struct stat st;
1144 int r = 0;
1145 int q = 0;
1146 CreationMode creation;
1147
1148 assert(i);
1149
1150 log_debug("Running create action for entry %c %s", (char) i->type, i->path);
1151
1152 switch (i->type) {
1153
1154 case IGNORE_PATH:
1155 case IGNORE_DIRECTORY_PATH:
1156 case REMOVE_PATH:
1157 case RECURSIVE_REMOVE_PATH:
1158 return 0;
1159
1160 case CREATE_FILE:
1161 case TRUNCATE_FILE:
1162 r = write_one_file(i, i->path);
1163 if (r < 0)
1164 return r;
1165 break;
1166
1167 case COPY_FILES: {
1168 r = specifier_printf(i->argument, specifier_table, NULL, &resolved);
1169 if (r < 0)
1170 return log_error_errno(r, "Failed to substitute specifiers in copy source %s: %m", i->argument);
1171
1172 log_debug("Copying tree \"%s\" to \"%s\".", resolved, i->path);
1173 r = copy_tree(resolved, i->path, false);
1174
1175 if (r == -EROFS && stat(i->path, &st) == 0)
1176 r = -EEXIST;
1177
1178 if (r < 0) {
1179 struct stat a, b;
1180
1181 if (r != -EEXIST)
1182 return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
1183
1184 if (stat(resolved, &a) < 0)
1185 return log_error_errno(errno, "stat(%s) failed: %m", resolved);
1186
1187 if (stat(i->path, &b) < 0)
1188 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1189
1190 if ((a.st_mode ^ b.st_mode) & S_IFMT) {
1191 log_debug("Can't copy to %s, file exists already and is of different type", i->path);
1192 return 0;
1193 }
1194 }
1195
1196 r = path_set_perms(i, i->path);
1197 if (r < 0)
1198 return r;
1199
1200 break;
1201
1202 case WRITE_FILE:
1203 r = glob_item(i, write_one_file, false);
1204 if (r < 0)
1205 return r;
1206
1207 break;
1208
1209 case CREATE_DIRECTORY:
1210 case TRUNCATE_DIRECTORY:
1211 case CREATE_SUBVOLUME:
1212 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1213 case CREATE_SUBVOLUME_NEW_QUOTA:
1214 RUN_WITH_UMASK(0000)
1215 mkdir_parents_label(i->path, 0755);
1216
1217 if (IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) {
1218
1219 if (btrfs_is_subvol(isempty(arg_root) ? "/" : arg_root) <= 0)
1220
1221 /* Don't create a subvolume unless the
1222 * root directory is one, too. We do
1223 * this under the assumption that if
1224 * the root directory is just a plain
1225 * directory (i.e. very light-weight),
1226 * we shouldn't try to split it up
1227 * into subvolumes (i.e. more
1228 * heavy-weight). Thus, chroot()
1229 * environments and suchlike will get
1230 * a full brtfs subvolume set up below
1231 * their tree only if they
1232 * specifically set up a btrfs
1233 * subvolume for the root dir too. */
1234
1235 r = -ENOTTY;
1236 else {
1237 RUN_WITH_UMASK((~i->mode) & 0777)
1238 r = btrfs_subvol_make(i->path);
1239 }
1240 } else
1241 r = 0;
1242
1243 if (IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY) || r == -ENOTTY)
1244 RUN_WITH_UMASK(0000)
1245 r = mkdir_label(i->path, i->mode);
1246
1247 if (r < 0) {
1248 int k;
1249
1250 if (r != -EEXIST && r != -EROFS)
1251 return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", i->path);
1252
1253 k = is_dir(i->path, false);
1254 if (k == -ENOENT && r == -EROFS)
1255 return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", i->path);
1256 if (k < 0)
1257 return log_error_errno(k, "Failed to check if %s exists: %m", i->path);
1258 if (!k) {
1259 log_warning("\"%s\" already exists and is not a directory.", i->path);
1260 return 0;
1261 }
1262
1263 creation = CREATION_EXISTING;
1264 } else
1265 creation = CREATION_NORMAL;
1266
1267 log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), i->path);
1268
1269 if (IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
1270 r = btrfs_subvol_auto_qgroup(i->path, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
1271 if (r == -ENOTTY)
1272 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
1273 else if (r == -EROFS)
1274 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
1275 else if (r == -ENOPROTOOPT)
1276 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
1277 else if (r < 0)
1278 q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
1279 else if (r > 0)
1280 log_debug("Adjusted quota for subvolume \"%s\".", i->path);
1281 else if (r == 0)
1282 log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
1283 }
1284
1285 /* fall through */
1286
1287 case EMPTY_DIRECTORY:
1288 r = path_set_perms(i, i->path);
1289 if (q < 0)
1290 return q;
1291 if (r < 0)
1292 return r;
1293
1294 break;
1295
1296 case CREATE_FIFO:
1297 RUN_WITH_UMASK(0000) {
1298 mac_selinux_create_file_prepare(i->path, S_IFIFO);
1299 r = mkfifo(i->path, i->mode);
1300 mac_selinux_create_file_clear();
1301 }
1302
1303 if (r < 0) {
1304 if (errno != EEXIST)
1305 return log_error_errno(errno, "Failed to create fifo %s: %m", i->path);
1306
1307 if (lstat(i->path, &st) < 0)
1308 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1309
1310 if (!S_ISFIFO(st.st_mode)) {
1311
1312 if (i->force) {
1313 RUN_WITH_UMASK(0000) {
1314 mac_selinux_create_file_prepare(i->path, S_IFIFO);
1315 r = mkfifo_atomic(i->path, i->mode);
1316 mac_selinux_create_file_clear();
1317 }
1318
1319 if (r < 0)
1320 return log_error_errno(r, "Failed to create fifo %s: %m", i->path);
1321 creation = CREATION_FORCE;
1322 } else {
1323 log_warning("\"%s\" already exists and is not a fifo.", i->path);
1324 return 0;
1325 }
1326 } else
1327 creation = CREATION_EXISTING;
1328 } else
1329 creation = CREATION_NORMAL;
1330 log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), i->path);
1331
1332 r = path_set_perms(i, i->path);
1333 if (r < 0)
1334 return r;
1335
1336 break;
1337 }
1338
1339 case CREATE_SYMLINK: {
1340 r = specifier_printf(i->argument, specifier_table, NULL, &resolved);
1341 if (r < 0)
1342 return log_error_errno(r, "Failed to substitute specifiers in symlink target %s: %m", i->argument);
1343
1344 mac_selinux_create_file_prepare(i->path, S_IFLNK);
1345 r = symlink(resolved, i->path);
1346 mac_selinux_create_file_clear();
1347
1348 if (r < 0) {
1349 _cleanup_free_ char *x = NULL;
1350
1351 if (errno != EEXIST)
1352 return log_error_errno(errno, "symlink(%s, %s) failed: %m", resolved, i->path);
1353
1354 r = readlink_malloc(i->path, &x);
1355 if (r < 0 || !streq(resolved, x)) {
1356
1357 if (i->force) {
1358 mac_selinux_create_file_prepare(i->path, S_IFLNK);
1359 r = symlink_atomic(resolved, i->path);
1360 mac_selinux_create_file_clear();
1361
1362 if (r < 0)
1363 return log_error_errno(r, "symlink(%s, %s) failed: %m", resolved, i->path);
1364
1365 creation = CREATION_FORCE;
1366 } else {
1367 log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);
1368 return 0;
1369 }
1370 } else
1371 creation = CREATION_EXISTING;
1372 } else
1373
1374 creation = CREATION_NORMAL;
1375 log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);
1376 break;
1377 }
1378
1379 case CREATE_BLOCK_DEVICE:
1380 case CREATE_CHAR_DEVICE: {
1381 mode_t file_type;
1382
1383 if (have_effective_cap(CAP_MKNOD) == 0) {
1384 /* In a container we lack CAP_MKNOD. We
1385 shouldn't attempt to create the device node in
1386 that case to avoid noise, and we don't support
1387 virtualized devices in containers anyway. */
1388
1389 log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);
1390 return 0;
1391 }
1392
1393 file_type = i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR;
1394
1395 RUN_WITH_UMASK(0000) {
1396 mac_selinux_create_file_prepare(i->path, file_type);
1397 r = mknod(i->path, i->mode | file_type, i->major_minor);
1398 mac_selinux_create_file_clear();
1399 }
1400
1401 if (r < 0) {
1402 if (errno == EPERM) {
1403 log_debug("We lack permissions, possibly because of cgroup configuration; "
1404 "skipping creation of device node %s.", i->path);
1405 return 0;
1406 }
1407
1408 if (errno != EEXIST)
1409 return log_error_errno(errno, "Failed to create device node %s: %m", i->path);
1410
1411 if (lstat(i->path, &st) < 0)
1412 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1413
1414 if ((st.st_mode & S_IFMT) != file_type) {
1415
1416 if (i->force) {
1417
1418 RUN_WITH_UMASK(0000) {
1419 mac_selinux_create_file_prepare(i->path, file_type);
1420 r = mknod_atomic(i->path, i->mode | file_type, i->major_minor);
1421 mac_selinux_create_file_clear();
1422 }
1423
1424 if (r < 0)
1425 return log_error_errno(r, "Failed to create device node \"%s\": %m", i->path);
1426 creation = CREATION_FORCE;
1427 } else {
1428 log_debug("%s is not a device node.", i->path);
1429 return 0;
1430 }
1431 } else
1432 creation = CREATION_EXISTING;
1433 } else
1434 creation = CREATION_NORMAL;
1435
1436 log_debug("%s %s device node \"%s\" %u:%u.",
1437 creation_mode_verb_to_string(creation),
1438 i->type == CREATE_BLOCK_DEVICE ? "block" : "char",
1439 i->path, major(i->mode), minor(i->mode));
1440
1441 r = path_set_perms(i, i->path);
1442 if (r < 0)
1443 return r;
1444
1445 break;
1446 }
1447
1448 case ADJUST_MODE:
1449 case RELABEL_PATH:
1450 r = glob_item(i, path_set_perms, false);
1451 if (r < 0)
1452 return r;
1453 break;
1454
1455 case RECURSIVE_RELABEL_PATH:
1456 r = glob_item(i, path_set_perms, true);
1457 if (r < 0)
1458 return r;
1459 break;
1460
1461 case SET_XATTR:
1462 r = glob_item(i, path_set_xattrs, false);
1463 if (r < 0)
1464 return r;
1465 break;
1466
1467 case RECURSIVE_SET_XATTR:
1468 r = glob_item(i, path_set_xattrs, true);
1469 if (r < 0)
1470 return r;
1471 break;
1472
1473 case SET_ACL:
1474 r = glob_item(i, path_set_acls, false);
1475 if (r < 0)
1476 return r;
1477 break;
1478
1479 case RECURSIVE_SET_ACL:
1480 r = glob_item(i, path_set_acls, true);
1481 if (r < 0)
1482 return r;
1483 break;
1484
1485 case SET_ATTRIBUTE:
1486 r = glob_item(i, path_set_attribute, false);
1487 if (r < 0)
1488 return r;
1489 break;
1490
1491 case RECURSIVE_SET_ATTRIBUTE:
1492 r = glob_item(i, path_set_attribute, true);
1493 if (r < 0)
1494 return r;
1495 break;
1496 }
1497
1498 return 0;
1499 }
1500
1501 static int remove_item_instance(Item *i, const char *instance) {
1502 int r;
1503
1504 assert(i);
1505
1506 switch (i->type) {
1507
1508 case REMOVE_PATH:
1509 if (remove(instance) < 0 && errno != ENOENT)
1510 return log_error_errno(errno, "rm(%s): %m", instance);
1511
1512 break;
1513
1514 case TRUNCATE_DIRECTORY:
1515 case RECURSIVE_REMOVE_PATH:
1516 /* FIXME: we probably should use dir_cleanup() here
1517 * instead of rm_rf() so that 'x' is honoured. */
1518 log_debug("rm -rf \"%s\"", instance);
1519 r = rm_rf(instance, (i->type == RECURSIVE_REMOVE_PATH ? REMOVE_ROOT|REMOVE_SUBVOLUME : 0) | REMOVE_PHYSICAL);
1520 if (r < 0 && r != -ENOENT)
1521 return log_error_errno(r, "rm_rf(%s): %m", instance);
1522
1523 break;
1524
1525 default:
1526 assert_not_reached("wut?");
1527 }
1528
1529 return 0;
1530 }
1531
1532 static int remove_item(Item *i) {
1533 assert(i);
1534
1535 log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
1536
1537 switch (i->type) {
1538
1539 case REMOVE_PATH:
1540 case TRUNCATE_DIRECTORY:
1541 case RECURSIVE_REMOVE_PATH:
1542 return glob_item(i, remove_item_instance, false);
1543
1544 default:
1545 return 0;
1546 }
1547 }
1548
1549 static int clean_item_instance(Item *i, const char* instance) {
1550 _cleanup_closedir_ DIR *d = NULL;
1551 struct stat s, ps;
1552 bool mountpoint;
1553 usec_t cutoff, n;
1554 char timestamp[FORMAT_TIMESTAMP_MAX];
1555
1556 assert(i);
1557
1558 if (!i->age_set)
1559 return 0;
1560
1561 n = now(CLOCK_REALTIME);
1562 if (n < i->age)
1563 return 0;
1564
1565 cutoff = n - i->age;
1566
1567 d = opendir_nomod(instance);
1568 if (!d) {
1569 if (IN_SET(errno, ENOENT, ENOTDIR)) {
1570 log_debug_errno(errno, "Directory \"%s\": %m", instance);
1571 return 0;
1572 }
1573
1574 return log_error_errno(errno, "Failed to open directory %s: %m", instance);
1575 }
1576
1577 if (fstat(dirfd(d), &s) < 0)
1578 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1579
1580 if (!S_ISDIR(s.st_mode)) {
1581 log_error("%s is not a directory.", i->path);
1582 return -ENOTDIR;
1583 }
1584
1585 if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
1586 return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
1587
1588 mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino;
1589
1590 log_debug("Cleanup threshold for %s \"%s\" is %s",
1591 mountpoint ? "mount point" : "directory",
1592 instance,
1593 format_timestamp_us(timestamp, sizeof(timestamp), cutoff));
1594
1595 return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,
1596 MAX_DEPTH, i->keep_first_level);
1597 }
1598
1599 static int clean_item(Item *i) {
1600 assert(i);
1601
1602 log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
1603
1604 switch (i->type) {
1605 case CREATE_DIRECTORY:
1606 case CREATE_SUBVOLUME:
1607 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1608 case CREATE_SUBVOLUME_NEW_QUOTA:
1609 case EMPTY_DIRECTORY:
1610 case TRUNCATE_DIRECTORY:
1611 case IGNORE_PATH:
1612 case COPY_FILES:
1613 clean_item_instance(i, i->path);
1614 return 0;
1615 case IGNORE_DIRECTORY_PATH:
1616 return glob_item(i, clean_item_instance, false);
1617 default:
1618 return 0;
1619 }
1620 }
1621
1622 static int process_item_array(ItemArray *array);
1623
1624 static int process_item(Item *i) {
1625 int r, q, p, t = 0;
1626 _cleanup_free_ char *prefix = NULL;
1627
1628 assert(i);
1629
1630 if (i->done)
1631 return 0;
1632
1633 i->done = true;
1634
1635 prefix = malloc(strlen(i->path) + 1);
1636 if (!prefix)
1637 return log_oom();
1638
1639 PATH_FOREACH_PREFIX(prefix, i->path) {
1640 ItemArray *j;
1641
1642 j = ordered_hashmap_get(items, prefix);
1643 if (j) {
1644 int s;
1645
1646 s = process_item_array(j);
1647 if (s < 0 && t == 0)
1648 t = s;
1649 }
1650 }
1651
1652 r = arg_create ? create_item(i) : 0;
1653 q = arg_remove ? remove_item(i) : 0;
1654 p = arg_clean ? clean_item(i) : 0;
1655
1656 return t < 0 ? t :
1657 r < 0 ? r :
1658 q < 0 ? q :
1659 p;
1660 }
1661
1662 static int process_item_array(ItemArray *array) {
1663 unsigned n;
1664 int r = 0, k;
1665
1666 assert(array);
1667
1668 for (n = 0; n < array->count; n++) {
1669 k = process_item(array->items + n);
1670 if (k < 0 && r == 0)
1671 r = k;
1672 }
1673
1674 return r;
1675 }
1676
1677 static void item_free_contents(Item *i) {
1678 assert(i);
1679 free(i->path);
1680 free(i->argument);
1681 strv_free(i->xattrs);
1682
1683 #ifdef HAVE_ACL
1684 acl_free(i->acl_access);
1685 acl_free(i->acl_default);
1686 #endif
1687 }
1688
1689 static void item_array_free(ItemArray *a) {
1690 unsigned n;
1691
1692 if (!a)
1693 return;
1694
1695 for (n = 0; n < a->count; n++)
1696 item_free_contents(a->items + n);
1697 free(a->items);
1698 free(a);
1699 }
1700
1701 static int item_compare(const void *a, const void *b) {
1702 const Item *x = a, *y = b;
1703
1704 /* Make sure that the ownership taking item is put first, so
1705 * that we first create the node, and then can adjust it */
1706
1707 if (takes_ownership(x->type) && !takes_ownership(y->type))
1708 return -1;
1709 if (!takes_ownership(x->type) && takes_ownership(y->type))
1710 return 1;
1711
1712 return (int) x->type - (int) y->type;
1713 }
1714
1715 static bool item_compatible(Item *a, Item *b) {
1716 assert(a);
1717 assert(b);
1718 assert(streq(a->path, b->path));
1719
1720 if (takes_ownership(a->type) && takes_ownership(b->type))
1721 /* check if the items are the same */
1722 return streq_ptr(a->argument, b->argument) &&
1723
1724 a->uid_set == b->uid_set &&
1725 a->uid == b->uid &&
1726
1727 a->gid_set == b->gid_set &&
1728 a->gid == b->gid &&
1729
1730 a->mode_set == b->mode_set &&
1731 a->mode == b->mode &&
1732
1733 a->age_set == b->age_set &&
1734 a->age == b->age &&
1735
1736 a->mask_perms == b->mask_perms &&
1737
1738 a->keep_first_level == b->keep_first_level &&
1739
1740 a->major_minor == b->major_minor;
1741
1742 return true;
1743 }
1744
1745 static bool should_include_path(const char *path) {
1746 char **prefix;
1747
1748 STRV_FOREACH(prefix, arg_exclude_prefixes)
1749 if (path_startswith(path, *prefix)) {
1750 log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
1751 path, *prefix);
1752 return false;
1753 }
1754
1755 STRV_FOREACH(prefix, arg_include_prefixes)
1756 if (path_startswith(path, *prefix)) {
1757 log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
1758 return true;
1759 }
1760
1761 /* no matches, so we should include this path only if we
1762 * have no whitelist at all */
1763 if (strv_length(arg_include_prefixes) == 0)
1764 return true;
1765
1766 log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
1767 return false;
1768 }
1769
1770 static int parse_line(const char *fname, unsigned line, const char *buffer) {
1771
1772 _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
1773 _cleanup_(item_free_contents) Item i = {};
1774 ItemArray *existing;
1775 OrderedHashmap *h;
1776 int r, pos;
1777 bool force = false, boot = false;
1778
1779 assert(fname);
1780 assert(line >= 1);
1781 assert(buffer);
1782
1783 r = extract_many_words(
1784 &buffer,
1785 NULL,
1786 EXTRACT_QUOTES,
1787 &action,
1788 &path,
1789 &mode,
1790 &user,
1791 &group,
1792 &age,
1793 NULL);
1794 if (r < 0)
1795 return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
1796 else if (r < 2) {
1797 log_error("[%s:%u] Syntax error.", fname, line);
1798 return -EIO;
1799 }
1800
1801 if (!isempty(buffer) && !streq(buffer, "-")) {
1802 i.argument = strdup(buffer);
1803 if (!i.argument)
1804 return log_oom();
1805 }
1806
1807 if (isempty(action)) {
1808 log_error("[%s:%u] Command too short '%s'.", fname, line, action);
1809 return -EINVAL;
1810 }
1811
1812 for (pos = 1; action[pos]; pos++) {
1813 if (action[pos] == '!' && !boot)
1814 boot = true;
1815 else if (action[pos] == '+' && !force)
1816 force = true;
1817 else {
1818 log_error("[%s:%u] Unknown modifiers in command '%s'",
1819 fname, line, action);
1820 return -EINVAL;
1821 }
1822 }
1823
1824 if (boot && !arg_boot) {
1825 log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",
1826 action, path);
1827 return 0;
1828 }
1829
1830 i.type = action[0];
1831 i.force = force;
1832
1833 r = specifier_printf(path, specifier_table, NULL, &i.path);
1834 if (r < 0) {
1835 log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, path);
1836 return r;
1837 }
1838
1839 switch (i.type) {
1840
1841 case CREATE_DIRECTORY:
1842 case CREATE_SUBVOLUME:
1843 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1844 case CREATE_SUBVOLUME_NEW_QUOTA:
1845 case EMPTY_DIRECTORY:
1846 case TRUNCATE_DIRECTORY:
1847 case CREATE_FIFO:
1848 case IGNORE_PATH:
1849 case IGNORE_DIRECTORY_PATH:
1850 case REMOVE_PATH:
1851 case RECURSIVE_REMOVE_PATH:
1852 case ADJUST_MODE:
1853 case RELABEL_PATH:
1854 case RECURSIVE_RELABEL_PATH:
1855 if (i.argument)
1856 log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
1857
1858 break;
1859
1860 case CREATE_FILE:
1861 case TRUNCATE_FILE:
1862 break;
1863
1864 case CREATE_SYMLINK:
1865 if (!i.argument) {
1866 i.argument = strappend("/usr/share/factory/", i.path);
1867 if (!i.argument)
1868 return log_oom();
1869 }
1870 break;
1871
1872 case WRITE_FILE:
1873 if (!i.argument) {
1874 log_error("[%s:%u] Write file requires argument.", fname, line);
1875 return -EBADMSG;
1876 }
1877 break;
1878
1879 case COPY_FILES:
1880 if (!i.argument) {
1881 i.argument = strappend("/usr/share/factory/", i.path);
1882 if (!i.argument)
1883 return log_oom();
1884 } else if (!path_is_absolute(i.argument)) {
1885 log_error("[%s:%u] Source path is not absolute.", fname, line);
1886 return -EBADMSG;
1887 }
1888
1889 path_kill_slashes(i.argument);
1890 break;
1891
1892 case CREATE_CHAR_DEVICE:
1893 case CREATE_BLOCK_DEVICE: {
1894 unsigned major, minor;
1895
1896 if (!i.argument) {
1897 log_error("[%s:%u] Device file requires argument.", fname, line);
1898 return -EBADMSG;
1899 }
1900
1901 if (sscanf(i.argument, "%u:%u", &major, &minor) != 2) {
1902 log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
1903 return -EBADMSG;
1904 }
1905
1906 i.major_minor = makedev(major, minor);
1907 break;
1908 }
1909
1910 case SET_XATTR:
1911 case RECURSIVE_SET_XATTR:
1912 if (!i.argument) {
1913 log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
1914 return -EBADMSG;
1915 }
1916 r = parse_xattrs_from_arg(&i);
1917 if (r < 0)
1918 return r;
1919 break;
1920
1921 case SET_ACL:
1922 case RECURSIVE_SET_ACL:
1923 if (!i.argument) {
1924 log_error("[%s:%u] Set ACLs requires argument.", fname, line);
1925 return -EBADMSG;
1926 }
1927 r = parse_acls_from_arg(&i);
1928 if (r < 0)
1929 return r;
1930 break;
1931
1932 case SET_ATTRIBUTE:
1933 case RECURSIVE_SET_ATTRIBUTE:
1934 if (!i.argument) {
1935 log_error("[%s:%u] Set file attribute requires argument.", fname, line);
1936 return -EBADMSG;
1937 }
1938 r = parse_attribute_from_arg(&i);
1939 if (r < 0)
1940 return r;
1941 break;
1942
1943 default:
1944 log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
1945 return -EBADMSG;
1946 }
1947
1948 if (!path_is_absolute(i.path)) {
1949 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
1950 return -EBADMSG;
1951 }
1952
1953 path_kill_slashes(i.path);
1954
1955 if (!should_include_path(i.path))
1956 return 0;
1957
1958 if (arg_root) {
1959 char *p;
1960
1961 p = prefix_root(arg_root, i.path);
1962 if (!p)
1963 return log_oom();
1964
1965 free(i.path);
1966 i.path = p;
1967 }
1968
1969 if (!isempty(user) && !streq(user, "-")) {
1970 const char *u = user;
1971
1972 r = get_user_creds(&u, &i.uid, NULL, NULL, NULL);
1973 if (r < 0) {
1974 log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
1975 return r;
1976 }
1977
1978 i.uid_set = true;
1979 }
1980
1981 if (!isempty(group) && !streq(group, "-")) {
1982 const char *g = group;
1983
1984 r = get_group_creds(&g, &i.gid);
1985 if (r < 0) {
1986 log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
1987 return r;
1988 }
1989
1990 i.gid_set = true;
1991 }
1992
1993 if (!isempty(mode) && !streq(mode, "-")) {
1994 const char *mm = mode;
1995 unsigned m;
1996
1997 if (*mm == '~') {
1998 i.mask_perms = true;
1999 mm++;
2000 }
2001
2002 if (parse_mode(mm, &m) < 0) {
2003 log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
2004 return -EBADMSG;
2005 }
2006
2007 i.mode = m;
2008 i.mode_set = true;
2009 } else
2010 i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
2011
2012 if (!isempty(age) && !streq(age, "-")) {
2013 const char *a = age;
2014
2015 if (*a == '~') {
2016 i.keep_first_level = true;
2017 a++;
2018 }
2019
2020 if (parse_sec(a, &i.age) < 0) {
2021 log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
2022 return -EBADMSG;
2023 }
2024
2025 i.age_set = true;
2026 }
2027
2028 h = needs_glob(i.type) ? globs : items;
2029
2030 existing = ordered_hashmap_get(h, i.path);
2031 if (existing) {
2032 unsigned n;
2033
2034 for (n = 0; n < existing->count; n++) {
2035 if (!item_compatible(existing->items + n, &i)) {
2036 log_warning("[%s:%u] Duplicate line for path \"%s\", ignoring.",
2037 fname, line, i.path);
2038 return 0;
2039 }
2040 }
2041 } else {
2042 existing = new0(ItemArray, 1);
2043 r = ordered_hashmap_put(h, i.path, existing);
2044 if (r < 0)
2045 return log_oom();
2046 }
2047
2048 if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1))
2049 return log_oom();
2050
2051 memcpy(existing->items + existing->count++, &i, sizeof(i));
2052
2053 /* Sort item array, to enforce stable ordering of application */
2054 qsort_safe(existing->items, existing->count, sizeof(Item), item_compare);
2055
2056 zero(i);
2057 return 0;
2058 }
2059
2060 static void help(void) {
2061 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
2062 "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
2063 " -h --help Show this help\n"
2064 " --version Show package version\n"
2065 " --create Create marked files/directories\n"
2066 " --clean Clean up marked directories\n"
2067 " --remove Remove marked files/directories\n"
2068 " --boot Execute actions only safe at boot\n"
2069 " --prefix=PATH Only apply rules with the specified prefix\n"
2070 " --exclude-prefix=PATH Ignore rules with the specified prefix\n"
2071 " --root=PATH Operate on an alternate filesystem root\n",
2072 program_invocation_short_name);
2073 }
2074
2075 static int parse_argv(int argc, char *argv[]) {
2076
2077 enum {
2078 ARG_VERSION = 0x100,
2079 ARG_CREATE,
2080 ARG_CLEAN,
2081 ARG_REMOVE,
2082 ARG_BOOT,
2083 ARG_PREFIX,
2084 ARG_EXCLUDE_PREFIX,
2085 ARG_ROOT,
2086 };
2087
2088 static const struct option options[] = {
2089 { "help", no_argument, NULL, 'h' },
2090 { "version", no_argument, NULL, ARG_VERSION },
2091 { "create", no_argument, NULL, ARG_CREATE },
2092 { "clean", no_argument, NULL, ARG_CLEAN },
2093 { "remove", no_argument, NULL, ARG_REMOVE },
2094 { "boot", no_argument, NULL, ARG_BOOT },
2095 { "prefix", required_argument, NULL, ARG_PREFIX },
2096 { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
2097 { "root", required_argument, NULL, ARG_ROOT },
2098 {}
2099 };
2100
2101 int c, r;
2102
2103 assert(argc >= 0);
2104 assert(argv);
2105
2106 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
2107
2108 switch (c) {
2109
2110 case 'h':
2111 help();
2112 return 0;
2113
2114 case ARG_VERSION:
2115 return version();
2116
2117 case ARG_CREATE:
2118 arg_create = true;
2119 break;
2120
2121 case ARG_CLEAN:
2122 arg_clean = true;
2123 break;
2124
2125 case ARG_REMOVE:
2126 arg_remove = true;
2127 break;
2128
2129 case ARG_BOOT:
2130 arg_boot = true;
2131 break;
2132
2133 case ARG_PREFIX:
2134 if (strv_push(&arg_include_prefixes, optarg) < 0)
2135 return log_oom();
2136 break;
2137
2138 case ARG_EXCLUDE_PREFIX:
2139 if (strv_push(&arg_exclude_prefixes, optarg) < 0)
2140 return log_oom();
2141 break;
2142
2143 case ARG_ROOT:
2144 r = parse_path_argument_and_warn(optarg, true, &arg_root);
2145 if (r < 0)
2146 return r;
2147 break;
2148
2149 case '?':
2150 return -EINVAL;
2151
2152 default:
2153 assert_not_reached("Unhandled option");
2154 }
2155
2156 if (!arg_clean && !arg_create && !arg_remove) {
2157 log_error("You need to specify at least one of --clean, --create or --remove.");
2158 return -EINVAL;
2159 }
2160
2161 return 1;
2162 }
2163
2164 static int read_config_file(const char *fn, bool ignore_enoent) {
2165 _cleanup_fclose_ FILE *_f = NULL;
2166 FILE *f;
2167 char line[LINE_MAX];
2168 Iterator iterator;
2169 unsigned v = 0;
2170 Item *i;
2171 int r = 0;
2172
2173 assert(fn);
2174
2175 if (streq(fn, "-")) {
2176 log_debug("Reading config from stdin.");
2177 fn = "<stdin>";
2178 f = stdin;
2179 } else {
2180 r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &_f);
2181 if (r < 0) {
2182 if (ignore_enoent && r == -ENOENT) {
2183 log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
2184 return 0;
2185 }
2186
2187 return log_error_errno(r, "Failed to open '%s': %m", fn);
2188 }
2189 log_debug("Reading config file \"%s\".", fn);
2190 f = _f;
2191 }
2192
2193 FOREACH_LINE(line, f, break) {
2194 char *l;
2195 int k;
2196
2197 v++;
2198
2199 l = strstrip(line);
2200 if (*l == '#' || *l == 0)
2201 continue;
2202
2203 k = parse_line(fn, v, l);
2204 if (k < 0 && r == 0)
2205 r = k;
2206 }
2207
2208 /* we have to determine age parameter for each entry of type X */
2209 ORDERED_HASHMAP_FOREACH(i, globs, iterator) {
2210 Iterator iter;
2211 Item *j, *candidate_item = NULL;
2212
2213 if (i->type != IGNORE_DIRECTORY_PATH)
2214 continue;
2215
2216 ORDERED_HASHMAP_FOREACH(j, items, iter) {
2217 if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))
2218 continue;
2219
2220 if (path_equal(j->path, i->path)) {
2221 candidate_item = j;
2222 break;
2223 }
2224
2225 if ((!candidate_item && path_startswith(i->path, j->path)) ||
2226 (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
2227 candidate_item = j;
2228 }
2229
2230 if (candidate_item && candidate_item->age_set) {
2231 i->age = candidate_item->age;
2232 i->age_set = true;
2233 }
2234 }
2235
2236 if (ferror(f)) {
2237 log_error_errno(errno, "Failed to read from file %s: %m", fn);
2238 if (r == 0)
2239 r = -EIO;
2240 }
2241
2242 return r;
2243 }
2244
2245 int main(int argc, char *argv[]) {
2246 int r, k;
2247 ItemArray *a;
2248 Iterator iterator;
2249
2250 r = parse_argv(argc, argv);
2251 if (r <= 0)
2252 goto finish;
2253
2254 log_set_target(LOG_TARGET_AUTO);
2255 log_parse_environment();
2256 log_open();
2257
2258 umask(0022);
2259
2260 mac_selinux_init();
2261
2262 items = ordered_hashmap_new(&string_hash_ops);
2263 globs = ordered_hashmap_new(&string_hash_ops);
2264
2265 if (!items || !globs) {
2266 r = log_oom();
2267 goto finish;
2268 }
2269
2270 r = 0;
2271
2272 if (optind < argc) {
2273 int j;
2274
2275 for (j = optind; j < argc; j++) {
2276 k = read_config_file(argv[j], false);
2277 if (k < 0 && r == 0)
2278 r = k;
2279 }
2280
2281 } else {
2282 _cleanup_strv_free_ char **files = NULL;
2283 char **f;
2284
2285 r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs);
2286 if (r < 0) {
2287 log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m");
2288 goto finish;
2289 }
2290
2291 STRV_FOREACH(f, files) {
2292 k = read_config_file(*f, true);
2293 if (k < 0 && r == 0)
2294 r = k;
2295 }
2296 }
2297
2298 /* The non-globbing ones usually create things, hence we apply
2299 * them first */
2300 ORDERED_HASHMAP_FOREACH(a, items, iterator) {
2301 k = process_item_array(a);
2302 if (k < 0 && r == 0)
2303 r = k;
2304 }
2305
2306 /* The globbing ones usually alter things, hence we apply them
2307 * second. */
2308 ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
2309 k = process_item_array(a);
2310 if (k < 0 && r == 0)
2311 r = k;
2312 }
2313
2314 finish:
2315 while ((a = ordered_hashmap_steal_first(items)))
2316 item_array_free(a);
2317
2318 while ((a = ordered_hashmap_steal_first(globs)))
2319 item_array_free(a);
2320
2321 ordered_hashmap_free(items);
2322 ordered_hashmap_free(globs);
2323
2324 free(arg_include_prefixes);
2325 free(arg_exclude_prefixes);
2326 free(arg_root);
2327
2328 set_free_free(unix_sockets);
2329
2330 mac_selinux_finish();
2331
2332 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
2333 }
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