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Merge pull request #4879 from poettering/systemd
[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 (STR_IN_SET(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 errno = 0;
1074
1075 if (STR_IN_SET(de->d_name, ".", ".."))
1076 continue;
1077
1078 p = strjoin(path, "/", de->d_name);
1079 if (!p)
1080 return -ENOMEM;
1081
1082 q = action(i, p);
1083 if (q < 0 && q != -ENOENT && r == 0)
1084 r = q;
1085
1086 if (IN_SET(de->d_type, DT_UNKNOWN, DT_DIR)) {
1087 q = item_do_children(i, p, action);
1088 if (q < 0 && r == 0)
1089 r = q;
1090 }
1091 }
1092
1093 return r;
1094 }
1095
1096 static int glob_item(Item *i, action_t action, bool recursive) {
1097 _cleanup_globfree_ glob_t g = {
1098 .gl_closedir = (void (*)(void *)) closedir,
1099 .gl_readdir = (struct dirent *(*)(void *)) readdir,
1100 .gl_opendir = (void *(*)(const char *)) opendir_nomod,
1101 .gl_lstat = lstat,
1102 .gl_stat = stat,
1103 };
1104 int r = 0, k;
1105 char **fn;
1106
1107 errno = 0;
1108 k = glob(i->path, GLOB_NOSORT|GLOB_BRACE|GLOB_ALTDIRFUNC, NULL, &g);
1109 if (k != 0 && k != GLOB_NOMATCH)
1110 return log_error_errno(errno ?: EIO, "glob(%s) failed: %m", i->path);
1111
1112 STRV_FOREACH(fn, g.gl_pathv) {
1113 k = action(i, *fn);
1114 if (k < 0 && r == 0)
1115 r = k;
1116
1117 if (recursive) {
1118 k = item_do_children(i, *fn, action);
1119 if (k < 0 && r == 0)
1120 r = k;
1121 }
1122 }
1123
1124 return r;
1125 }
1126
1127 typedef enum {
1128 CREATION_NORMAL,
1129 CREATION_EXISTING,
1130 CREATION_FORCE,
1131 _CREATION_MODE_MAX,
1132 _CREATION_MODE_INVALID = -1
1133 } CreationMode;
1134
1135 static const char *creation_mode_verb_table[_CREATION_MODE_MAX] = {
1136 [CREATION_NORMAL] = "Created",
1137 [CREATION_EXISTING] = "Found existing",
1138 [CREATION_FORCE] = "Created replacement",
1139 };
1140
1141 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);
1142
1143 static int create_item(Item *i) {
1144 _cleanup_free_ char *resolved = NULL;
1145 struct stat st;
1146 int r = 0;
1147 int q = 0;
1148 CreationMode creation;
1149
1150 assert(i);
1151
1152 log_debug("Running create action for entry %c %s", (char) i->type, i->path);
1153
1154 switch (i->type) {
1155
1156 case IGNORE_PATH:
1157 case IGNORE_DIRECTORY_PATH:
1158 case REMOVE_PATH:
1159 case RECURSIVE_REMOVE_PATH:
1160 return 0;
1161
1162 case CREATE_FILE:
1163 case TRUNCATE_FILE:
1164 r = write_one_file(i, i->path);
1165 if (r < 0)
1166 return r;
1167 break;
1168
1169 case COPY_FILES: {
1170 r = specifier_printf(i->argument, specifier_table, NULL, &resolved);
1171 if (r < 0)
1172 return log_error_errno(r, "Failed to substitute specifiers in copy source %s: %m", i->argument);
1173
1174 log_debug("Copying tree \"%s\" to \"%s\".", resolved, i->path);
1175 r = copy_tree(resolved, i->path, false);
1176
1177 if (r == -EROFS && stat(i->path, &st) == 0)
1178 r = -EEXIST;
1179
1180 if (r < 0) {
1181 struct stat a, b;
1182
1183 if (r != -EEXIST)
1184 return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
1185
1186 if (stat(resolved, &a) < 0)
1187 return log_error_errno(errno, "stat(%s) failed: %m", resolved);
1188
1189 if (stat(i->path, &b) < 0)
1190 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1191
1192 if ((a.st_mode ^ b.st_mode) & S_IFMT) {
1193 log_debug("Can't copy to %s, file exists already and is of different type", i->path);
1194 return 0;
1195 }
1196 }
1197
1198 r = path_set_perms(i, i->path);
1199 if (r < 0)
1200 return r;
1201
1202 break;
1203
1204 case WRITE_FILE:
1205 r = glob_item(i, write_one_file, false);
1206 if (r < 0)
1207 return r;
1208
1209 break;
1210
1211 case CREATE_DIRECTORY:
1212 case TRUNCATE_DIRECTORY:
1213 case CREATE_SUBVOLUME:
1214 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1215 case CREATE_SUBVOLUME_NEW_QUOTA:
1216 RUN_WITH_UMASK(0000)
1217 mkdir_parents_label(i->path, 0755);
1218
1219 if (IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) {
1220
1221 if (btrfs_is_subvol(isempty(arg_root) ? "/" : arg_root) <= 0)
1222
1223 /* Don't create a subvolume unless the
1224 * root directory is one, too. We do
1225 * this under the assumption that if
1226 * the root directory is just a plain
1227 * directory (i.e. very light-weight),
1228 * we shouldn't try to split it up
1229 * into subvolumes (i.e. more
1230 * heavy-weight). Thus, chroot()
1231 * environments and suchlike will get
1232 * a full brtfs subvolume set up below
1233 * their tree only if they
1234 * specifically set up a btrfs
1235 * subvolume for the root dir too. */
1236
1237 r = -ENOTTY;
1238 else {
1239 RUN_WITH_UMASK((~i->mode) & 0777)
1240 r = btrfs_subvol_make(i->path);
1241 }
1242 } else
1243 r = 0;
1244
1245 if (IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY) || r == -ENOTTY)
1246 RUN_WITH_UMASK(0000)
1247 r = mkdir_label(i->path, i->mode);
1248
1249 if (r < 0) {
1250 int k;
1251
1252 if (r != -EEXIST && r != -EROFS)
1253 return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", i->path);
1254
1255 k = is_dir(i->path, false);
1256 if (k == -ENOENT && r == -EROFS)
1257 return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", i->path);
1258 if (k < 0)
1259 return log_error_errno(k, "Failed to check if %s exists: %m", i->path);
1260 if (!k) {
1261 log_warning("\"%s\" already exists and is not a directory.", i->path);
1262 return 0;
1263 }
1264
1265 creation = CREATION_EXISTING;
1266 } else
1267 creation = CREATION_NORMAL;
1268
1269 log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), i->path);
1270
1271 if (IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
1272 r = btrfs_subvol_auto_qgroup(i->path, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
1273 if (r == -ENOTTY)
1274 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
1275 else if (r == -EROFS)
1276 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
1277 else if (r == -ENOPROTOOPT)
1278 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
1279 else if (r < 0)
1280 q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
1281 else if (r > 0)
1282 log_debug("Adjusted quota for subvolume \"%s\".", i->path);
1283 else if (r == 0)
1284 log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
1285 }
1286
1287 /* fall through */
1288
1289 case EMPTY_DIRECTORY:
1290 r = path_set_perms(i, i->path);
1291 if (q < 0)
1292 return q;
1293 if (r < 0)
1294 return r;
1295
1296 break;
1297
1298 case CREATE_FIFO:
1299 RUN_WITH_UMASK(0000) {
1300 mac_selinux_create_file_prepare(i->path, S_IFIFO);
1301 r = mkfifo(i->path, i->mode);
1302 mac_selinux_create_file_clear();
1303 }
1304
1305 if (r < 0) {
1306 if (errno != EEXIST)
1307 return log_error_errno(errno, "Failed to create fifo %s: %m", i->path);
1308
1309 if (lstat(i->path, &st) < 0)
1310 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1311
1312 if (!S_ISFIFO(st.st_mode)) {
1313
1314 if (i->force) {
1315 RUN_WITH_UMASK(0000) {
1316 mac_selinux_create_file_prepare(i->path, S_IFIFO);
1317 r = mkfifo_atomic(i->path, i->mode);
1318 mac_selinux_create_file_clear();
1319 }
1320
1321 if (r < 0)
1322 return log_error_errno(r, "Failed to create fifo %s: %m", i->path);
1323 creation = CREATION_FORCE;
1324 } else {
1325 log_warning("\"%s\" already exists and is not a fifo.", i->path);
1326 return 0;
1327 }
1328 } else
1329 creation = CREATION_EXISTING;
1330 } else
1331 creation = CREATION_NORMAL;
1332 log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), i->path);
1333
1334 r = path_set_perms(i, i->path);
1335 if (r < 0)
1336 return r;
1337
1338 break;
1339 }
1340
1341 case CREATE_SYMLINK: {
1342 r = specifier_printf(i->argument, specifier_table, NULL, &resolved);
1343 if (r < 0)
1344 return log_error_errno(r, "Failed to substitute specifiers in symlink target %s: %m", i->argument);
1345
1346 mac_selinux_create_file_prepare(i->path, S_IFLNK);
1347 r = symlink(resolved, i->path);
1348 mac_selinux_create_file_clear();
1349
1350 if (r < 0) {
1351 _cleanup_free_ char *x = NULL;
1352
1353 if (errno != EEXIST)
1354 return log_error_errno(errno, "symlink(%s, %s) failed: %m", resolved, i->path);
1355
1356 r = readlink_malloc(i->path, &x);
1357 if (r < 0 || !streq(resolved, x)) {
1358
1359 if (i->force) {
1360 mac_selinux_create_file_prepare(i->path, S_IFLNK);
1361 r = symlink_atomic(resolved, i->path);
1362 mac_selinux_create_file_clear();
1363
1364 if (r < 0)
1365 return log_error_errno(r, "symlink(%s, %s) failed: %m", resolved, i->path);
1366
1367 creation = CREATION_FORCE;
1368 } else {
1369 log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);
1370 return 0;
1371 }
1372 } else
1373 creation = CREATION_EXISTING;
1374 } else
1375
1376 creation = CREATION_NORMAL;
1377 log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);
1378 break;
1379 }
1380
1381 case CREATE_BLOCK_DEVICE:
1382 case CREATE_CHAR_DEVICE: {
1383 mode_t file_type;
1384
1385 if (have_effective_cap(CAP_MKNOD) == 0) {
1386 /* In a container we lack CAP_MKNOD. We
1387 shouldn't attempt to create the device node in
1388 that case to avoid noise, and we don't support
1389 virtualized devices in containers anyway. */
1390
1391 log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);
1392 return 0;
1393 }
1394
1395 file_type = i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR;
1396
1397 RUN_WITH_UMASK(0000) {
1398 mac_selinux_create_file_prepare(i->path, file_type);
1399 r = mknod(i->path, i->mode | file_type, i->major_minor);
1400 mac_selinux_create_file_clear();
1401 }
1402
1403 if (r < 0) {
1404 if (errno == EPERM) {
1405 log_debug("We lack permissions, possibly because of cgroup configuration; "
1406 "skipping creation of device node %s.", i->path);
1407 return 0;
1408 }
1409
1410 if (errno != EEXIST)
1411 return log_error_errno(errno, "Failed to create device node %s: %m", i->path);
1412
1413 if (lstat(i->path, &st) < 0)
1414 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1415
1416 if ((st.st_mode & S_IFMT) != file_type) {
1417
1418 if (i->force) {
1419
1420 RUN_WITH_UMASK(0000) {
1421 mac_selinux_create_file_prepare(i->path, file_type);
1422 r = mknod_atomic(i->path, i->mode | file_type, i->major_minor);
1423 mac_selinux_create_file_clear();
1424 }
1425
1426 if (r < 0)
1427 return log_error_errno(r, "Failed to create device node \"%s\": %m", i->path);
1428 creation = CREATION_FORCE;
1429 } else {
1430 log_debug("%s is not a device node.", i->path);
1431 return 0;
1432 }
1433 } else
1434 creation = CREATION_EXISTING;
1435 } else
1436 creation = CREATION_NORMAL;
1437
1438 log_debug("%s %s device node \"%s\" %u:%u.",
1439 creation_mode_verb_to_string(creation),
1440 i->type == CREATE_BLOCK_DEVICE ? "block" : "char",
1441 i->path, major(i->mode), minor(i->mode));
1442
1443 r = path_set_perms(i, i->path);
1444 if (r < 0)
1445 return r;
1446
1447 break;
1448 }
1449
1450 case ADJUST_MODE:
1451 case RELABEL_PATH:
1452 r = glob_item(i, path_set_perms, false);
1453 if (r < 0)
1454 return r;
1455 break;
1456
1457 case RECURSIVE_RELABEL_PATH:
1458 r = glob_item(i, path_set_perms, true);
1459 if (r < 0)
1460 return r;
1461 break;
1462
1463 case SET_XATTR:
1464 r = glob_item(i, path_set_xattrs, false);
1465 if (r < 0)
1466 return r;
1467 break;
1468
1469 case RECURSIVE_SET_XATTR:
1470 r = glob_item(i, path_set_xattrs, true);
1471 if (r < 0)
1472 return r;
1473 break;
1474
1475 case SET_ACL:
1476 r = glob_item(i, path_set_acls, false);
1477 if (r < 0)
1478 return r;
1479 break;
1480
1481 case RECURSIVE_SET_ACL:
1482 r = glob_item(i, path_set_acls, true);
1483 if (r < 0)
1484 return r;
1485 break;
1486
1487 case SET_ATTRIBUTE:
1488 r = glob_item(i, path_set_attribute, false);
1489 if (r < 0)
1490 return r;
1491 break;
1492
1493 case RECURSIVE_SET_ATTRIBUTE:
1494 r = glob_item(i, path_set_attribute, true);
1495 if (r < 0)
1496 return r;
1497 break;
1498 }
1499
1500 return 0;
1501 }
1502
1503 static int remove_item_instance(Item *i, const char *instance) {
1504 int r;
1505
1506 assert(i);
1507
1508 switch (i->type) {
1509
1510 case REMOVE_PATH:
1511 if (remove(instance) < 0 && errno != ENOENT)
1512 return log_error_errno(errno, "rm(%s): %m", instance);
1513
1514 break;
1515
1516 case TRUNCATE_DIRECTORY:
1517 case RECURSIVE_REMOVE_PATH:
1518 /* FIXME: we probably should use dir_cleanup() here
1519 * instead of rm_rf() so that 'x' is honoured. */
1520 log_debug("rm -rf \"%s\"", instance);
1521 r = rm_rf(instance, (i->type == RECURSIVE_REMOVE_PATH ? REMOVE_ROOT|REMOVE_SUBVOLUME : 0) | REMOVE_PHYSICAL);
1522 if (r < 0 && r != -ENOENT)
1523 return log_error_errno(r, "rm_rf(%s): %m", instance);
1524
1525 break;
1526
1527 default:
1528 assert_not_reached("wut?");
1529 }
1530
1531 return 0;
1532 }
1533
1534 static int remove_item(Item *i) {
1535 assert(i);
1536
1537 log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
1538
1539 switch (i->type) {
1540
1541 case REMOVE_PATH:
1542 case TRUNCATE_DIRECTORY:
1543 case RECURSIVE_REMOVE_PATH:
1544 return glob_item(i, remove_item_instance, false);
1545
1546 default:
1547 return 0;
1548 }
1549 }
1550
1551 static int clean_item_instance(Item *i, const char* instance) {
1552 _cleanup_closedir_ DIR *d = NULL;
1553 struct stat s, ps;
1554 bool mountpoint;
1555 usec_t cutoff, n;
1556 char timestamp[FORMAT_TIMESTAMP_MAX];
1557
1558 assert(i);
1559
1560 if (!i->age_set)
1561 return 0;
1562
1563 n = now(CLOCK_REALTIME);
1564 if (n < i->age)
1565 return 0;
1566
1567 cutoff = n - i->age;
1568
1569 d = opendir_nomod(instance);
1570 if (!d) {
1571 if (IN_SET(errno, ENOENT, ENOTDIR)) {
1572 log_debug_errno(errno, "Directory \"%s\": %m", instance);
1573 return 0;
1574 }
1575
1576 return log_error_errno(errno, "Failed to open directory %s: %m", instance);
1577 }
1578
1579 if (fstat(dirfd(d), &s) < 0)
1580 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1581
1582 if (!S_ISDIR(s.st_mode)) {
1583 log_error("%s is not a directory.", i->path);
1584 return -ENOTDIR;
1585 }
1586
1587 if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
1588 return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
1589
1590 mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino;
1591
1592 log_debug("Cleanup threshold for %s \"%s\" is %s",
1593 mountpoint ? "mount point" : "directory",
1594 instance,
1595 format_timestamp_us(timestamp, sizeof(timestamp), cutoff));
1596
1597 return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,
1598 MAX_DEPTH, i->keep_first_level);
1599 }
1600
1601 static int clean_item(Item *i) {
1602 assert(i);
1603
1604 log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
1605
1606 switch (i->type) {
1607 case CREATE_DIRECTORY:
1608 case CREATE_SUBVOLUME:
1609 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1610 case CREATE_SUBVOLUME_NEW_QUOTA:
1611 case EMPTY_DIRECTORY:
1612 case TRUNCATE_DIRECTORY:
1613 case IGNORE_PATH:
1614 case COPY_FILES:
1615 clean_item_instance(i, i->path);
1616 return 0;
1617 case IGNORE_DIRECTORY_PATH:
1618 return glob_item(i, clean_item_instance, false);
1619 default:
1620 return 0;
1621 }
1622 }
1623
1624 static int process_item_array(ItemArray *array);
1625
1626 static int process_item(Item *i) {
1627 int r, q, p, t = 0;
1628 _cleanup_free_ char *prefix = NULL;
1629
1630 assert(i);
1631
1632 if (i->done)
1633 return 0;
1634
1635 i->done = true;
1636
1637 prefix = malloc(strlen(i->path) + 1);
1638 if (!prefix)
1639 return log_oom();
1640
1641 PATH_FOREACH_PREFIX(prefix, i->path) {
1642 ItemArray *j;
1643
1644 j = ordered_hashmap_get(items, prefix);
1645 if (j) {
1646 int s;
1647
1648 s = process_item_array(j);
1649 if (s < 0 && t == 0)
1650 t = s;
1651 }
1652 }
1653
1654 r = arg_create ? create_item(i) : 0;
1655 q = arg_remove ? remove_item(i) : 0;
1656 p = arg_clean ? clean_item(i) : 0;
1657
1658 return t < 0 ? t :
1659 r < 0 ? r :
1660 q < 0 ? q :
1661 p;
1662 }
1663
1664 static int process_item_array(ItemArray *array) {
1665 unsigned n;
1666 int r = 0, k;
1667
1668 assert(array);
1669
1670 for (n = 0; n < array->count; n++) {
1671 k = process_item(array->items + n);
1672 if (k < 0 && r == 0)
1673 r = k;
1674 }
1675
1676 return r;
1677 }
1678
1679 static void item_free_contents(Item *i) {
1680 assert(i);
1681 free(i->path);
1682 free(i->argument);
1683 strv_free(i->xattrs);
1684
1685 #ifdef HAVE_ACL
1686 acl_free(i->acl_access);
1687 acl_free(i->acl_default);
1688 #endif
1689 }
1690
1691 static void item_array_free(ItemArray *a) {
1692 unsigned n;
1693
1694 if (!a)
1695 return;
1696
1697 for (n = 0; n < a->count; n++)
1698 item_free_contents(a->items + n);
1699 free(a->items);
1700 free(a);
1701 }
1702
1703 static int item_compare(const void *a, const void *b) {
1704 const Item *x = a, *y = b;
1705
1706 /* Make sure that the ownership taking item is put first, so
1707 * that we first create the node, and then can adjust it */
1708
1709 if (takes_ownership(x->type) && !takes_ownership(y->type))
1710 return -1;
1711 if (!takes_ownership(x->type) && takes_ownership(y->type))
1712 return 1;
1713
1714 return (int) x->type - (int) y->type;
1715 }
1716
1717 static bool item_compatible(Item *a, Item *b) {
1718 assert(a);
1719 assert(b);
1720 assert(streq(a->path, b->path));
1721
1722 if (takes_ownership(a->type) && takes_ownership(b->type))
1723 /* check if the items are the same */
1724 return streq_ptr(a->argument, b->argument) &&
1725
1726 a->uid_set == b->uid_set &&
1727 a->uid == b->uid &&
1728
1729 a->gid_set == b->gid_set &&
1730 a->gid == b->gid &&
1731
1732 a->mode_set == b->mode_set &&
1733 a->mode == b->mode &&
1734
1735 a->age_set == b->age_set &&
1736 a->age == b->age &&
1737
1738 a->mask_perms == b->mask_perms &&
1739
1740 a->keep_first_level == b->keep_first_level &&
1741
1742 a->major_minor == b->major_minor;
1743
1744 return true;
1745 }
1746
1747 static bool should_include_path(const char *path) {
1748 char **prefix;
1749
1750 STRV_FOREACH(prefix, arg_exclude_prefixes)
1751 if (path_startswith(path, *prefix)) {
1752 log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
1753 path, *prefix);
1754 return false;
1755 }
1756
1757 STRV_FOREACH(prefix, arg_include_prefixes)
1758 if (path_startswith(path, *prefix)) {
1759 log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
1760 return true;
1761 }
1762
1763 /* no matches, so we should include this path only if we
1764 * have no whitelist at all */
1765 if (strv_length(arg_include_prefixes) == 0)
1766 return true;
1767
1768 log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
1769 return false;
1770 }
1771
1772 static int parse_line(const char *fname, unsigned line, const char *buffer) {
1773
1774 _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
1775 _cleanup_(item_free_contents) Item i = {};
1776 ItemArray *existing;
1777 OrderedHashmap *h;
1778 int r, pos;
1779 bool force = false, boot = false;
1780
1781 assert(fname);
1782 assert(line >= 1);
1783 assert(buffer);
1784
1785 r = extract_many_words(
1786 &buffer,
1787 NULL,
1788 EXTRACT_QUOTES,
1789 &action,
1790 &path,
1791 &mode,
1792 &user,
1793 &group,
1794 &age,
1795 NULL);
1796 if (r < 0)
1797 return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
1798 else if (r < 2) {
1799 log_error("[%s:%u] Syntax error.", fname, line);
1800 return -EIO;
1801 }
1802
1803 if (!isempty(buffer) && !streq(buffer, "-")) {
1804 i.argument = strdup(buffer);
1805 if (!i.argument)
1806 return log_oom();
1807 }
1808
1809 if (isempty(action)) {
1810 log_error("[%s:%u] Command too short '%s'.", fname, line, action);
1811 return -EINVAL;
1812 }
1813
1814 for (pos = 1; action[pos]; pos++) {
1815 if (action[pos] == '!' && !boot)
1816 boot = true;
1817 else if (action[pos] == '+' && !force)
1818 force = true;
1819 else {
1820 log_error("[%s:%u] Unknown modifiers in command '%s'",
1821 fname, line, action);
1822 return -EINVAL;
1823 }
1824 }
1825
1826 if (boot && !arg_boot) {
1827 log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",
1828 action, path);
1829 return 0;
1830 }
1831
1832 i.type = action[0];
1833 i.force = force;
1834
1835 r = specifier_printf(path, specifier_table, NULL, &i.path);
1836 if (r < 0) {
1837 log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, path);
1838 return r;
1839 }
1840
1841 switch (i.type) {
1842
1843 case CREATE_DIRECTORY:
1844 case CREATE_SUBVOLUME:
1845 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1846 case CREATE_SUBVOLUME_NEW_QUOTA:
1847 case EMPTY_DIRECTORY:
1848 case TRUNCATE_DIRECTORY:
1849 case CREATE_FIFO:
1850 case IGNORE_PATH:
1851 case IGNORE_DIRECTORY_PATH:
1852 case REMOVE_PATH:
1853 case RECURSIVE_REMOVE_PATH:
1854 case ADJUST_MODE:
1855 case RELABEL_PATH:
1856 case RECURSIVE_RELABEL_PATH:
1857 if (i.argument)
1858 log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
1859
1860 break;
1861
1862 case CREATE_FILE:
1863 case TRUNCATE_FILE:
1864 break;
1865
1866 case CREATE_SYMLINK:
1867 if (!i.argument) {
1868 i.argument = strappend("/usr/share/factory/", i.path);
1869 if (!i.argument)
1870 return log_oom();
1871 }
1872 break;
1873
1874 case WRITE_FILE:
1875 if (!i.argument) {
1876 log_error("[%s:%u] Write file requires argument.", fname, line);
1877 return -EBADMSG;
1878 }
1879 break;
1880
1881 case COPY_FILES:
1882 if (!i.argument) {
1883 i.argument = strappend("/usr/share/factory/", i.path);
1884 if (!i.argument)
1885 return log_oom();
1886 } else if (!path_is_absolute(i.argument)) {
1887 log_error("[%s:%u] Source path is not absolute.", fname, line);
1888 return -EBADMSG;
1889 }
1890
1891 path_kill_slashes(i.argument);
1892 break;
1893
1894 case CREATE_CHAR_DEVICE:
1895 case CREATE_BLOCK_DEVICE: {
1896 unsigned major, minor;
1897
1898 if (!i.argument) {
1899 log_error("[%s:%u] Device file requires argument.", fname, line);
1900 return -EBADMSG;
1901 }
1902
1903 if (sscanf(i.argument, "%u:%u", &major, &minor) != 2) {
1904 log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
1905 return -EBADMSG;
1906 }
1907
1908 i.major_minor = makedev(major, minor);
1909 break;
1910 }
1911
1912 case SET_XATTR:
1913 case RECURSIVE_SET_XATTR:
1914 if (!i.argument) {
1915 log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
1916 return -EBADMSG;
1917 }
1918 r = parse_xattrs_from_arg(&i);
1919 if (r < 0)
1920 return r;
1921 break;
1922
1923 case SET_ACL:
1924 case RECURSIVE_SET_ACL:
1925 if (!i.argument) {
1926 log_error("[%s:%u] Set ACLs requires argument.", fname, line);
1927 return -EBADMSG;
1928 }
1929 r = parse_acls_from_arg(&i);
1930 if (r < 0)
1931 return r;
1932 break;
1933
1934 case SET_ATTRIBUTE:
1935 case RECURSIVE_SET_ATTRIBUTE:
1936 if (!i.argument) {
1937 log_error("[%s:%u] Set file attribute requires argument.", fname, line);
1938 return -EBADMSG;
1939 }
1940 r = parse_attribute_from_arg(&i);
1941 if (r < 0)
1942 return r;
1943 break;
1944
1945 default:
1946 log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
1947 return -EBADMSG;
1948 }
1949
1950 if (!path_is_absolute(i.path)) {
1951 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
1952 return -EBADMSG;
1953 }
1954
1955 path_kill_slashes(i.path);
1956
1957 if (!should_include_path(i.path))
1958 return 0;
1959
1960 if (arg_root) {
1961 char *p;
1962
1963 p = prefix_root(arg_root, i.path);
1964 if (!p)
1965 return log_oom();
1966
1967 free(i.path);
1968 i.path = p;
1969 }
1970
1971 if (!isempty(user) && !streq(user, "-")) {
1972 const char *u = user;
1973
1974 r = get_user_creds(&u, &i.uid, NULL, NULL, NULL);
1975 if (r < 0) {
1976 log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
1977 return r;
1978 }
1979
1980 i.uid_set = true;
1981 }
1982
1983 if (!isempty(group) && !streq(group, "-")) {
1984 const char *g = group;
1985
1986 r = get_group_creds(&g, &i.gid);
1987 if (r < 0) {
1988 log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
1989 return r;
1990 }
1991
1992 i.gid_set = true;
1993 }
1994
1995 if (!isempty(mode) && !streq(mode, "-")) {
1996 const char *mm = mode;
1997 unsigned m;
1998
1999 if (*mm == '~') {
2000 i.mask_perms = true;
2001 mm++;
2002 }
2003
2004 if (parse_mode(mm, &m) < 0) {
2005 log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
2006 return -EBADMSG;
2007 }
2008
2009 i.mode = m;
2010 i.mode_set = true;
2011 } else
2012 i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
2013
2014 if (!isempty(age) && !streq(age, "-")) {
2015 const char *a = age;
2016
2017 if (*a == '~') {
2018 i.keep_first_level = true;
2019 a++;
2020 }
2021
2022 if (parse_sec(a, &i.age) < 0) {
2023 log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
2024 return -EBADMSG;
2025 }
2026
2027 i.age_set = true;
2028 }
2029
2030 h = needs_glob(i.type) ? globs : items;
2031
2032 existing = ordered_hashmap_get(h, i.path);
2033 if (existing) {
2034 unsigned n;
2035
2036 for (n = 0; n < existing->count; n++) {
2037 if (!item_compatible(existing->items + n, &i)) {
2038 log_warning("[%s:%u] Duplicate line for path \"%s\", ignoring.",
2039 fname, line, i.path);
2040 return 0;
2041 }
2042 }
2043 } else {
2044 existing = new0(ItemArray, 1);
2045 r = ordered_hashmap_put(h, i.path, existing);
2046 if (r < 0)
2047 return log_oom();
2048 }
2049
2050 if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1))
2051 return log_oom();
2052
2053 memcpy(existing->items + existing->count++, &i, sizeof(i));
2054
2055 /* Sort item array, to enforce stable ordering of application */
2056 qsort_safe(existing->items, existing->count, sizeof(Item), item_compare);
2057
2058 zero(i);
2059 return 0;
2060 }
2061
2062 static void help(void) {
2063 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
2064 "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
2065 " -h --help Show this help\n"
2066 " --version Show package version\n"
2067 " --create Create marked files/directories\n"
2068 " --clean Clean up marked directories\n"
2069 " --remove Remove marked files/directories\n"
2070 " --boot Execute actions only safe at boot\n"
2071 " --prefix=PATH Only apply rules with the specified prefix\n"
2072 " --exclude-prefix=PATH Ignore rules with the specified prefix\n"
2073 " --root=PATH Operate on an alternate filesystem root\n",
2074 program_invocation_short_name);
2075 }
2076
2077 static int parse_argv(int argc, char *argv[]) {
2078
2079 enum {
2080 ARG_VERSION = 0x100,
2081 ARG_CREATE,
2082 ARG_CLEAN,
2083 ARG_REMOVE,
2084 ARG_BOOT,
2085 ARG_PREFIX,
2086 ARG_EXCLUDE_PREFIX,
2087 ARG_ROOT,
2088 };
2089
2090 static const struct option options[] = {
2091 { "help", no_argument, NULL, 'h' },
2092 { "version", no_argument, NULL, ARG_VERSION },
2093 { "create", no_argument, NULL, ARG_CREATE },
2094 { "clean", no_argument, NULL, ARG_CLEAN },
2095 { "remove", no_argument, NULL, ARG_REMOVE },
2096 { "boot", no_argument, NULL, ARG_BOOT },
2097 { "prefix", required_argument, NULL, ARG_PREFIX },
2098 { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
2099 { "root", required_argument, NULL, ARG_ROOT },
2100 {}
2101 };
2102
2103 int c, r;
2104
2105 assert(argc >= 0);
2106 assert(argv);
2107
2108 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
2109
2110 switch (c) {
2111
2112 case 'h':
2113 help();
2114 return 0;
2115
2116 case ARG_VERSION:
2117 return version();
2118
2119 case ARG_CREATE:
2120 arg_create = true;
2121 break;
2122
2123 case ARG_CLEAN:
2124 arg_clean = true;
2125 break;
2126
2127 case ARG_REMOVE:
2128 arg_remove = true;
2129 break;
2130
2131 case ARG_BOOT:
2132 arg_boot = true;
2133 break;
2134
2135 case ARG_PREFIX:
2136 if (strv_push(&arg_include_prefixes, optarg) < 0)
2137 return log_oom();
2138 break;
2139
2140 case ARG_EXCLUDE_PREFIX:
2141 if (strv_push(&arg_exclude_prefixes, optarg) < 0)
2142 return log_oom();
2143 break;
2144
2145 case ARG_ROOT:
2146 r = parse_path_argument_and_warn(optarg, true, &arg_root);
2147 if (r < 0)
2148 return r;
2149 break;
2150
2151 case '?':
2152 return -EINVAL;
2153
2154 default:
2155 assert_not_reached("Unhandled option");
2156 }
2157
2158 if (!arg_clean && !arg_create && !arg_remove) {
2159 log_error("You need to specify at least one of --clean, --create or --remove.");
2160 return -EINVAL;
2161 }
2162
2163 return 1;
2164 }
2165
2166 static int read_config_file(const char *fn, bool ignore_enoent) {
2167 _cleanup_fclose_ FILE *_f = NULL;
2168 FILE *f;
2169 char line[LINE_MAX];
2170 Iterator iterator;
2171 unsigned v = 0;
2172 Item *i;
2173 int r = 0;
2174
2175 assert(fn);
2176
2177 if (streq(fn, "-")) {
2178 log_debug("Reading config from stdin.");
2179 fn = "<stdin>";
2180 f = stdin;
2181 } else {
2182 r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &_f);
2183 if (r < 0) {
2184 if (ignore_enoent && r == -ENOENT) {
2185 log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
2186 return 0;
2187 }
2188
2189 return log_error_errno(r, "Failed to open '%s': %m", fn);
2190 }
2191 log_debug("Reading config file \"%s\".", fn);
2192 f = _f;
2193 }
2194
2195 FOREACH_LINE(line, f, break) {
2196 char *l;
2197 int k;
2198
2199 v++;
2200
2201 l = strstrip(line);
2202 if (*l == '#' || *l == 0)
2203 continue;
2204
2205 k = parse_line(fn, v, l);
2206 if (k < 0 && r == 0)
2207 r = k;
2208 }
2209
2210 /* we have to determine age parameter for each entry of type X */
2211 ORDERED_HASHMAP_FOREACH(i, globs, iterator) {
2212 Iterator iter;
2213 Item *j, *candidate_item = NULL;
2214
2215 if (i->type != IGNORE_DIRECTORY_PATH)
2216 continue;
2217
2218 ORDERED_HASHMAP_FOREACH(j, items, iter) {
2219 if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))
2220 continue;
2221
2222 if (path_equal(j->path, i->path)) {
2223 candidate_item = j;
2224 break;
2225 }
2226
2227 if ((!candidate_item && path_startswith(i->path, j->path)) ||
2228 (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
2229 candidate_item = j;
2230 }
2231
2232 if (candidate_item && candidate_item->age_set) {
2233 i->age = candidate_item->age;
2234 i->age_set = true;
2235 }
2236 }
2237
2238 if (ferror(f)) {
2239 log_error_errno(errno, "Failed to read from file %s: %m", fn);
2240 if (r == 0)
2241 r = -EIO;
2242 }
2243
2244 return r;
2245 }
2246
2247 int main(int argc, char *argv[]) {
2248 int r, k;
2249 ItemArray *a;
2250 Iterator iterator;
2251
2252 r = parse_argv(argc, argv);
2253 if (r <= 0)
2254 goto finish;
2255
2256 log_set_target(LOG_TARGET_AUTO);
2257 log_parse_environment();
2258 log_open();
2259
2260 umask(0022);
2261
2262 mac_selinux_init();
2263
2264 items = ordered_hashmap_new(&string_hash_ops);
2265 globs = ordered_hashmap_new(&string_hash_ops);
2266
2267 if (!items || !globs) {
2268 r = log_oom();
2269 goto finish;
2270 }
2271
2272 r = 0;
2273
2274 if (optind < argc) {
2275 int j;
2276
2277 for (j = optind; j < argc; j++) {
2278 k = read_config_file(argv[j], false);
2279 if (k < 0 && r == 0)
2280 r = k;
2281 }
2282
2283 } else {
2284 _cleanup_strv_free_ char **files = NULL;
2285 char **f;
2286
2287 r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs);
2288 if (r < 0) {
2289 log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m");
2290 goto finish;
2291 }
2292
2293 STRV_FOREACH(f, files) {
2294 k = read_config_file(*f, true);
2295 if (k < 0 && r == 0)
2296 r = k;
2297 }
2298 }
2299
2300 /* The non-globbing ones usually create things, hence we apply
2301 * them first */
2302 ORDERED_HASHMAP_FOREACH(a, items, iterator) {
2303 k = process_item_array(a);
2304 if (k < 0 && r == 0)
2305 r = k;
2306 }
2307
2308 /* The globbing ones usually alter things, hence we apply them
2309 * second. */
2310 ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
2311 k = process_item_array(a);
2312 if (k < 0 && r == 0)
2313 r = k;
2314 }
2315
2316 finish:
2317 while ((a = ordered_hashmap_steal_first(items)))
2318 item_array_free(a);
2319
2320 while ((a = ordered_hashmap_steal_first(globs)))
2321 item_array_free(a);
2322
2323 ordered_hashmap_free(items);
2324 ordered_hashmap_free(globs);
2325
2326 free(arg_include_prefixes);
2327 free(arg_exclude_prefixes);
2328 free(arg_root);
2329
2330 set_free_free(unix_sockets);
2331
2332 mac_selinux_finish();
2333
2334 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
2335 }
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