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Merge pull request #30847 from keszybz/some-docs-updates
[thirdparty/systemd.git] / src / tmpfiles / tmpfiles.c
1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <fnmatch.h>
6 #include <getopt.h>
7 #include <limits.h>
8 #include <linux/fs.h>
9 #include <stdbool.h>
10 #include <stddef.h>
11 #include <stdlib.h>
12 #include <sys/file.h>
13 #include <sys/xattr.h>
14 #include <sysexits.h>
15 #include <time.h>
16 #include <unistd.h>
17
18 #include "sd-path.h"
19
20 #include "acl-util.h"
21 #include "alloc-util.h"
22 #include "btrfs-util.h"
23 #include "build.h"
24 #include "capability-util.h"
25 #include "chase.h"
26 #include "chattr-util.h"
27 #include "conf-files.h"
28 #include "constants.h"
29 #include "copy.h"
30 #include "creds-util.h"
31 #include "devnum-util.h"
32 #include "dirent-util.h"
33 #include "dissect-image.h"
34 #include "env-util.h"
35 #include "errno-util.h"
36 #include "escape.h"
37 #include "fd-util.h"
38 #include "fileio.h"
39 #include "format-util.h"
40 #include "fs-util.h"
41 #include "glob-util.h"
42 #include "hexdecoct.h"
43 #include "io-util.h"
44 #include "label-util.h"
45 #include "log.h"
46 #include "macro.h"
47 #include "main-func.h"
48 #include "missing_syscall.h"
49 #include "mkdir-label.h"
50 #include "mount-util.h"
51 #include "mountpoint-util.h"
52 #include "nulstr-util.h"
53 #include "offline-passwd.h"
54 #include "pager.h"
55 #include "parse-argument.h"
56 #include "parse-util.h"
57 #include "path-lookup.h"
58 #include "path-util.h"
59 #include "pretty-print.h"
60 #include "rlimit-util.h"
61 #include "rm-rf.h"
62 #include "selinux-util.h"
63 #include "set.h"
64 #include "sort-util.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 "terminal-util.h"
72 #include "umask-util.h"
73 #include "user-util.h"
74 #include "virt.h"
75
76 /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
77 * them in the file system. This is intended to be used to create
78 * properly owned directories beneath /tmp, /var/tmp, /run, which are
79 * volatile and hence need to be recreated on bootup. */
80
81 typedef enum OperationMask {
82 OPERATION_CREATE = 1 << 0,
83 OPERATION_REMOVE = 1 << 1,
84 OPERATION_CLEAN = 1 << 2,
85 OPERATION_PURGE = 1 << 3,
86 } OperationMask;
87
88 typedef enum ItemType {
89 /* These ones take file names */
90 CREATE_FILE = 'f',
91 TRUNCATE_FILE = 'F', /* deprecated: use f+ */
92 CREATE_DIRECTORY = 'd',
93 TRUNCATE_DIRECTORY = 'D',
94 CREATE_SUBVOLUME = 'v',
95 CREATE_SUBVOLUME_INHERIT_QUOTA = 'q',
96 CREATE_SUBVOLUME_NEW_QUOTA = 'Q',
97 CREATE_FIFO = 'p',
98 CREATE_SYMLINK = 'L',
99 CREATE_CHAR_DEVICE = 'c',
100 CREATE_BLOCK_DEVICE = 'b',
101 COPY_FILES = 'C',
102
103 /* These ones take globs */
104 WRITE_FILE = 'w',
105 EMPTY_DIRECTORY = 'e',
106 SET_XATTR = 't',
107 RECURSIVE_SET_XATTR = 'T',
108 SET_ACL = 'a',
109 RECURSIVE_SET_ACL = 'A',
110 SET_ATTRIBUTE = 'h',
111 RECURSIVE_SET_ATTRIBUTE = 'H',
112 IGNORE_PATH = 'x',
113 IGNORE_DIRECTORY_PATH = 'X',
114 REMOVE_PATH = 'r',
115 RECURSIVE_REMOVE_PATH = 'R',
116 RELABEL_PATH = 'z',
117 RECURSIVE_RELABEL_PATH = 'Z',
118 ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */
119 } ItemType;
120
121 typedef enum AgeBy {
122 AGE_BY_ATIME = 1 << 0,
123 AGE_BY_BTIME = 1 << 1,
124 AGE_BY_CTIME = 1 << 2,
125 AGE_BY_MTIME = 1 << 3,
126
127 /* All file timestamp types are checked by default. */
128 AGE_BY_DEFAULT_FILE = AGE_BY_ATIME | AGE_BY_BTIME | AGE_BY_CTIME | AGE_BY_MTIME,
129 AGE_BY_DEFAULT_DIR = AGE_BY_ATIME | AGE_BY_BTIME | AGE_BY_MTIME,
130 } AgeBy;
131
132 typedef struct Item {
133 ItemType type;
134
135 char *path;
136 char *argument;
137 void *binary_argument; /* set if binary data, in which case it takes precedence over 'argument' */
138 size_t binary_argument_size;
139 char **xattrs;
140 #if HAVE_ACL
141 acl_t acl_access;
142 acl_t acl_access_exec;
143 acl_t acl_default;
144 #endif
145 uid_t uid;
146 gid_t gid;
147 mode_t mode;
148 usec_t age;
149 AgeBy age_by_file, age_by_dir;
150
151 dev_t major_minor;
152 unsigned attribute_value;
153 unsigned attribute_mask;
154
155 bool uid_set:1;
156 bool gid_set:1;
157 bool mode_set:1;
158 bool uid_only_create:1;
159 bool gid_only_create:1;
160 bool mode_only_create:1;
161 bool age_set:1;
162 bool mask_perms:1;
163 bool attribute_set:1;
164
165 bool keep_first_level:1;
166
167 bool append_or_force:1;
168
169 bool allow_failure:1;
170
171 bool try_replace:1;
172
173 OperationMask done;
174 } Item;
175
176 typedef struct ItemArray {
177 Item *items;
178 size_t n_items;
179
180 struct ItemArray *parent;
181 Set *children;
182 } ItemArray;
183
184 typedef enum DirectoryType {
185 DIRECTORY_RUNTIME,
186 DIRECTORY_STATE,
187 DIRECTORY_CACHE,
188 DIRECTORY_LOGS,
189 _DIRECTORY_TYPE_MAX,
190 } DirectoryType;
191
192 typedef enum {
193 CREATION_NORMAL,
194 CREATION_EXISTING,
195 CREATION_FORCE,
196 _CREATION_MODE_MAX,
197 _CREATION_MODE_INVALID = -EINVAL,
198 } CreationMode;
199
200 static CatFlags arg_cat_flags = CAT_CONFIG_OFF;
201 static RuntimeScope arg_runtime_scope = RUNTIME_SCOPE_SYSTEM;
202 static OperationMask arg_operation = 0;
203 static bool arg_boot = false;
204 static bool arg_graceful = false;
205 static PagerFlags arg_pager_flags = 0;
206
207 static char **arg_include_prefixes = NULL;
208 static char **arg_exclude_prefixes = NULL;
209 static char *arg_root = NULL;
210 static char *arg_image = NULL;
211 static char *arg_replace = NULL;
212 static ImagePolicy *arg_image_policy = NULL;
213
214 #define MAX_DEPTH 256
215
216 typedef struct Context {
217 OrderedHashmap *items, *globs;
218 Set *unix_sockets;
219 } Context;
220
221 STATIC_DESTRUCTOR_REGISTER(arg_include_prefixes, strv_freep);
222 STATIC_DESTRUCTOR_REGISTER(arg_exclude_prefixes, strv_freep);
223 STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
224 STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
225 STATIC_DESTRUCTOR_REGISTER(arg_image_policy, image_policy_freep);
226
227 static const char *const creation_mode_verb_table[_CREATION_MODE_MAX] = {
228 [CREATION_NORMAL] = "Created",
229 [CREATION_EXISTING] = "Found existing",
230 [CREATION_FORCE] = "Created replacement",
231 };
232
233 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);
234
235 static void context_done(Context *c) {
236 assert(c);
237
238 ordered_hashmap_free(c->items);
239 ordered_hashmap_free(c->globs);
240
241 set_free(c->unix_sockets);
242 }
243
244 /* Different kinds of errors that mean that information is not available in the environment. */
245 static bool ERRNO_IS_NOINFO(int r) {
246 return IN_SET(abs(r),
247 EUNATCH, /* os-release or machine-id missing */
248 ENOMEDIUM, /* machine-id or another file empty */
249 ENOPKG, /* machine-id is uninitialized */
250 ENXIO); /* env var is unset */
251 }
252
253 static int specifier_directory(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
254 struct table_entry {
255 uint64_t type;
256 const char *suffix;
257 };
258
259 static const struct table_entry paths_system[] = {
260 [DIRECTORY_RUNTIME] = { SD_PATH_SYSTEM_RUNTIME },
261 [DIRECTORY_STATE] = { SD_PATH_SYSTEM_STATE_PRIVATE },
262 [DIRECTORY_CACHE] = { SD_PATH_SYSTEM_STATE_CACHE },
263 [DIRECTORY_LOGS] = { SD_PATH_SYSTEM_STATE_LOGS },
264 };
265
266 static const struct table_entry paths_user[] = {
267 [DIRECTORY_RUNTIME] = { SD_PATH_USER_RUNTIME },
268 [DIRECTORY_STATE] = { SD_PATH_USER_STATE_PRIVATE },
269 [DIRECTORY_CACHE] = { SD_PATH_USER_STATE_CACHE },
270 [DIRECTORY_LOGS] = { SD_PATH_USER_STATE_PRIVATE, "log" },
271 };
272
273 const struct table_entry *paths;
274 _cleanup_free_ char *p = NULL;
275 unsigned i;
276 int r;
277
278 assert_cc(ELEMENTSOF(paths_system) == ELEMENTSOF(paths_user));
279 paths = arg_runtime_scope == RUNTIME_SCOPE_USER ? paths_user : paths_system;
280
281 i = PTR_TO_UINT(data);
282 assert(i < ELEMENTSOF(paths_system));
283
284 r = sd_path_lookup(paths[i].type, paths[i].suffix, &p);
285 if (r < 0)
286 return r;
287
288 if (arg_root) {
289 _cleanup_free_ char *j = NULL;
290
291 j = path_join(arg_root, p);
292 if (!j)
293 return -ENOMEM;
294
295 *ret = TAKE_PTR(j);
296 } else
297 *ret = TAKE_PTR(p);
298
299 return 0;
300 }
301
302 static int log_unresolvable_specifier(const char *filename, unsigned line) {
303 static bool notified = false;
304
305 /* In system mode, this is called when /etc is not fully initialized and some specifiers are
306 * unresolvable. In user mode, this is called when some variables are not defined. These cases are
307 * not considered a fatal error, so log at LOG_NOTICE only for the first time and then downgrade this
308 * to LOG_DEBUG for the rest.
309 *
310 * If we're running in a chroot (--root was used or sd_booted() reports that systemd is not running),
311 * always use LOG_DEBUG. We may be called to initialize a chroot before booting and there is no
312 * expectation that machine-id and other files will be populated.
313 */
314
315 int log_level = notified || arg_root || running_in_chroot() > 0 ?
316 LOG_DEBUG : LOG_NOTICE;
317
318 log_syntax(NULL,
319 log_level,
320 filename, line, 0,
321 "Failed to resolve specifier: %s, skipping.",
322 arg_runtime_scope == RUNTIME_SCOPE_USER ? "Required $XDG_... variable not defined" : "uninitialized /etc/ detected");
323
324 if (!notified)
325 log_full(log_level,
326 "All rules containing unresolvable specifiers will be skipped.");
327
328 notified = true;
329 return 0;
330 }
331
332 static int user_config_paths(char*** ret) {
333 _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
334 _cleanup_free_ char *persistent_config = NULL, *runtime_config = NULL, *data_home = NULL;
335 _cleanup_strv_free_ char **res = NULL;
336 int r;
337
338 r = xdg_user_dirs(&config_dirs, &data_dirs);
339 if (r < 0)
340 return r;
341
342 r = xdg_user_config_dir(&persistent_config, "/user-tmpfiles.d");
343 if (r < 0 && !ERRNO_IS_NOINFO(r))
344 return r;
345
346 r = xdg_user_runtime_dir(&runtime_config, "/user-tmpfiles.d");
347 if (r < 0 && !ERRNO_IS_NOINFO(r))
348 return r;
349
350 r = xdg_user_data_dir(&data_home, "/user-tmpfiles.d");
351 if (r < 0 && !ERRNO_IS_NOINFO(r))
352 return r;
353
354 r = strv_extend_strv_concat(&res, config_dirs, "/user-tmpfiles.d");
355 if (r < 0)
356 return r;
357
358 r = strv_extend_many(
359 &res,
360 persistent_config,
361 runtime_config,
362 data_home);
363 if (r < 0)
364 return r;
365
366 r = strv_extend_strv_concat(&res, data_dirs, "/user-tmpfiles.d");
367 if (r < 0)
368 return r;
369
370 r = path_strv_make_absolute_cwd(res);
371 if (r < 0)
372 return r;
373
374 *ret = TAKE_PTR(res);
375 return 0;
376 }
377
378 static bool needs_purge(ItemType t) {
379 return IN_SET(t,
380 COPY_FILES,
381 TRUNCATE_FILE,
382 CREATE_FILE,
383 WRITE_FILE,
384 EMPTY_DIRECTORY,
385 CREATE_SUBVOLUME,
386 CREATE_SUBVOLUME_INHERIT_QUOTA,
387 CREATE_SUBVOLUME_NEW_QUOTA,
388 CREATE_CHAR_DEVICE,
389 CREATE_BLOCK_DEVICE,
390 CREATE_SYMLINK,
391 CREATE_FIFO,
392 CREATE_DIRECTORY,
393 TRUNCATE_DIRECTORY);
394 }
395
396 static bool needs_glob(ItemType t) {
397 return IN_SET(t,
398 WRITE_FILE,
399 EMPTY_DIRECTORY,
400 SET_XATTR,
401 RECURSIVE_SET_XATTR,
402 SET_ACL,
403 RECURSIVE_SET_ACL,
404 SET_ATTRIBUTE,
405 RECURSIVE_SET_ATTRIBUTE,
406 IGNORE_PATH,
407 IGNORE_DIRECTORY_PATH,
408 REMOVE_PATH,
409 RECURSIVE_REMOVE_PATH,
410 RELABEL_PATH,
411 RECURSIVE_RELABEL_PATH,
412 ADJUST_MODE);
413 }
414
415 static bool takes_ownership(ItemType t) {
416 return IN_SET(t,
417 CREATE_FILE,
418 TRUNCATE_FILE,
419 CREATE_DIRECTORY,
420 TRUNCATE_DIRECTORY,
421 CREATE_SUBVOLUME,
422 CREATE_SUBVOLUME_INHERIT_QUOTA,
423 CREATE_SUBVOLUME_NEW_QUOTA,
424 CREATE_FIFO,
425 CREATE_SYMLINK,
426 CREATE_CHAR_DEVICE,
427 CREATE_BLOCK_DEVICE,
428 COPY_FILES,
429 WRITE_FILE,
430 EMPTY_DIRECTORY,
431 IGNORE_PATH,
432 IGNORE_DIRECTORY_PATH,
433 REMOVE_PATH,
434 RECURSIVE_REMOVE_PATH);
435 }
436
437 static struct Item* find_glob(OrderedHashmap *h, const char *match) {
438 ItemArray *j;
439
440 ORDERED_HASHMAP_FOREACH(j, h) {
441 size_t n;
442
443 for (n = 0; n < j->n_items; n++) {
444 Item *item = j->items + n;
445
446 if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
447 return item;
448 }
449 }
450
451 return NULL;
452 }
453
454 static int load_unix_sockets(Context *c) {
455 _cleanup_set_free_ Set *sockets = NULL;
456 _cleanup_fclose_ FILE *f = NULL;
457 int r;
458
459 if (c->unix_sockets)
460 return 0;
461
462 /* We maintain a cache of the sockets we found in /proc/net/unix to speed things up a little. */
463
464 f = fopen("/proc/net/unix", "re");
465 if (!f)
466 return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno,
467 "Failed to open /proc/net/unix, ignoring: %m");
468
469 /* Skip header */
470 r = read_line(f, LONG_LINE_MAX, NULL);
471 if (r < 0)
472 return log_warning_errno(r, "Failed to skip /proc/net/unix header line: %m");
473 if (r == 0)
474 return log_warning_errno(SYNTHETIC_ERRNO(EIO), "Premature end of file reading /proc/net/unix.");
475
476 for (;;) {
477 _cleanup_free_ char *line = NULL;
478 char *p;
479
480 r = read_line(f, LONG_LINE_MAX, &line);
481 if (r < 0)
482 return log_warning_errno(r, "Failed to read /proc/net/unix line, ignoring: %m");
483 if (r == 0) /* EOF */
484 break;
485
486 p = strchr(line, ':');
487 if (!p)
488 continue;
489
490 if (strlen(p) < 37)
491 continue;
492
493 p += 37;
494 p += strspn(p, WHITESPACE);
495 p += strcspn(p, WHITESPACE); /* skip one more word */
496 p += strspn(p, WHITESPACE);
497
498 if (!path_is_absolute(p))
499 continue;
500
501 r = set_put_strdup_full(&sockets, &path_hash_ops_free, p);
502 if (r < 0)
503 return log_warning_errno(r, "Failed to add AF_UNIX socket to set, ignoring: %m");
504 }
505
506 c->unix_sockets = TAKE_PTR(sockets);
507 return 1;
508 }
509
510 static bool unix_socket_alive(Context *c, const char *fn) {
511 assert(c);
512 assert(fn);
513
514 if (load_unix_sockets(c) < 0)
515 return true; /* We don't know, so assume yes */
516
517 return set_contains(c->unix_sockets, fn);
518 }
519
520 /* Accessors for the argument in binary format */
521 static const void* item_binary_argument(const Item *i) {
522 assert(i);
523 return i->binary_argument ?: i->argument;
524 }
525
526 static size_t item_binary_argument_size(const Item *i) {
527 assert(i);
528 return i->binary_argument ? i->binary_argument_size : strlen_ptr(i->argument);
529 }
530
531 static DIR* xopendirat_nomod(int dirfd, const char *path) {
532 DIR *dir;
533
534 dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME);
535 if (dir)
536 return dir;
537
538 if (!IN_SET(errno, ENOENT, ELOOP))
539 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
540
541 if (errno != EPERM)
542 return NULL;
543
544 dir = xopendirat(dirfd, path, O_NOFOLLOW);
545 if (!dir)
546 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
547
548 return dir;
549 }
550
551 static DIR* opendir_nomod(const char *path) {
552 return xopendirat_nomod(AT_FDCWD, path);
553 }
554
555 static bool needs_cleanup(
556 nsec_t atime,
557 nsec_t btime,
558 nsec_t ctime,
559 nsec_t mtime,
560 nsec_t cutoff,
561 const char *sub_path,
562 AgeBy age_by,
563 bool is_dir) {
564
565 if (FLAGS_SET(age_by, AGE_BY_MTIME) && mtime != NSEC_INFINITY && mtime >= cutoff) {
566 /* Follows spelling in stat(1). */
567 log_debug("%s \"%s\": modify time %s is too new.",
568 is_dir ? "Directory" : "File",
569 sub_path,
570 FORMAT_TIMESTAMP_STYLE(mtime / NSEC_PER_USEC, TIMESTAMP_US));
571
572 return false;
573 }
574
575 if (FLAGS_SET(age_by, AGE_BY_ATIME) && atime != NSEC_INFINITY && atime >= cutoff) {
576 log_debug("%s \"%s\": access time %s is too new.",
577 is_dir ? "Directory" : "File",
578 sub_path,
579 FORMAT_TIMESTAMP_STYLE(atime / NSEC_PER_USEC, TIMESTAMP_US));
580
581 return false;
582 }
583
584 /*
585 * Note: Unless explicitly specified by the user, "ctime" is ignored
586 * by default for directories, because we change it when deleting.
587 */
588 if (FLAGS_SET(age_by, AGE_BY_CTIME) && ctime != NSEC_INFINITY && ctime >= cutoff) {
589 log_debug("%s \"%s\": change time %s is too new.",
590 is_dir ? "Directory" : "File",
591 sub_path,
592 FORMAT_TIMESTAMP_STYLE(ctime / NSEC_PER_USEC, TIMESTAMP_US));
593
594 return false;
595 }
596
597 if (FLAGS_SET(age_by, AGE_BY_BTIME) && btime != NSEC_INFINITY && btime >= cutoff) {
598 log_debug("%s \"%s\": birth time %s is too new.",
599 is_dir ? "Directory" : "File",
600 sub_path,
601 FORMAT_TIMESTAMP_STYLE(btime / NSEC_PER_USEC, TIMESTAMP_US));
602
603 return false;
604 }
605
606 return true;
607 }
608
609 static int dir_cleanup(
610 Context *c,
611 Item *i,
612 const char *p,
613 DIR *d,
614 nsec_t self_atime_nsec,
615 nsec_t self_mtime_nsec,
616 nsec_t cutoff_nsec,
617 dev_t rootdev_major,
618 dev_t rootdev_minor,
619 bool mountpoint,
620 int maxdepth,
621 bool keep_this_level,
622 AgeBy age_by_file,
623 AgeBy age_by_dir) {
624
625 bool deleted = false;
626 int r = 0;
627
628 assert(c);
629 assert(i);
630 assert(d);
631
632 FOREACH_DIRENT_ALL(de, d, break) {
633 _cleanup_free_ char *sub_path = NULL;
634 nsec_t atime_nsec, mtime_nsec, ctime_nsec, btime_nsec;
635
636 if (dot_or_dot_dot(de->d_name))
637 continue;
638
639 /* If statx() is supported, use it. It's preferable over fstatat() since it tells us
640 * explicitly where we are looking at a mount point, for free as side information. Determining
641 * the same information without statx() is hard, see the complexity of path_is_mount_point(),
642 * and also much slower as it requires a number of syscalls instead of just one. Hence, when
643 * we have modern statx() we use it instead of fstat() and do proper mount point checks,
644 * while on older kernels's well do traditional st_dev based detection of mount points.
645 *
646 * Using statx() for detecting mount points also has the benefit that we handle weird file
647 * systems such as overlayfs better where each file is originating from a different
648 * st_dev. */
649
650 STRUCT_STATX_DEFINE(sx);
651
652 r = statx_fallback(
653 dirfd(d), de->d_name,
654 AT_SYMLINK_NOFOLLOW|AT_NO_AUTOMOUNT,
655 STATX_TYPE|STATX_MODE|STATX_UID|STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_BTIME,
656 &sx);
657 if (r == -ENOENT)
658 continue;
659 if (r < 0) {
660 /* FUSE, NFS mounts, SELinux might return EACCES */
661 r = log_full_errno(r == -EACCES ? LOG_DEBUG : LOG_ERR, r,
662 "statx(%s/%s) failed: %m", p, de->d_name);
663 continue;
664 }
665
666 if (FLAGS_SET(sx.stx_attributes_mask, STATX_ATTR_MOUNT_ROOT)) {
667 /* Yay, we have the mount point API, use it */
668 if (FLAGS_SET(sx.stx_attributes, STATX_ATTR_MOUNT_ROOT)) {
669 log_debug("Ignoring \"%s/%s\": different mount points.", p, de->d_name);
670 continue;
671 }
672 } else {
673 /* So we might have statx() but the STATX_ATTR_MOUNT_ROOT flag is not supported, fall
674 * back to traditional stx_dev checking. */
675 if (sx.stx_dev_major != rootdev_major ||
676 sx.stx_dev_minor != rootdev_minor) {
677 log_debug("Ignoring \"%s/%s\": different filesystem.", p, de->d_name);
678 continue;
679 }
680
681 /* Try to detect bind mounts of the same filesystem instance; they do not differ in device
682 * major/minors. This type of query is not supported on all kernels or filesystem types
683 * though. */
684 if (S_ISDIR(sx.stx_mode)) {
685 int q;
686
687 q = fd_is_mount_point(dirfd(d), de->d_name, 0);
688 if (q < 0)
689 log_debug_errno(q, "Failed to determine whether \"%s/%s\" is a mount point, ignoring: %m", p, de->d_name);
690 else if (q > 0) {
691 log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.", p, de->d_name);
692 continue;
693 }
694 }
695 }
696
697 atime_nsec = FLAGS_SET(sx.stx_mask, STATX_ATIME) ? statx_timestamp_load_nsec(&sx.stx_atime) : 0;
698 mtime_nsec = FLAGS_SET(sx.stx_mask, STATX_MTIME) ? statx_timestamp_load_nsec(&sx.stx_mtime) : 0;
699 ctime_nsec = FLAGS_SET(sx.stx_mask, STATX_CTIME) ? statx_timestamp_load_nsec(&sx.stx_ctime) : 0;
700 btime_nsec = FLAGS_SET(sx.stx_mask, STATX_BTIME) ? statx_timestamp_load_nsec(&sx.stx_btime) : 0;
701
702 sub_path = path_join(p, de->d_name);
703 if (!sub_path) {
704 r = log_oom();
705 goto finish;
706 }
707
708 /* Is there an item configured for this path? */
709 if (ordered_hashmap_get(c->items, sub_path)) {
710 log_debug("Ignoring \"%s\": a separate entry exists.", sub_path);
711 continue;
712 }
713
714 if (find_glob(c->globs, sub_path)) {
715 log_debug("Ignoring \"%s\": a separate glob exists.", sub_path);
716 continue;
717 }
718
719 if (S_ISDIR(sx.stx_mode)) {
720 _cleanup_closedir_ DIR *sub_dir = NULL;
721
722 if (mountpoint &&
723 streq(de->d_name, "lost+found") &&
724 sx.stx_uid == 0) {
725 log_debug("Ignoring directory \"%s\".", sub_path);
726 continue;
727 }
728
729 if (maxdepth <= 0)
730 log_warning("Reached max depth on \"%s\".", sub_path);
731 else {
732 int q;
733
734 sub_dir = xopendirat_nomod(dirfd(d), de->d_name);
735 if (!sub_dir) {
736 if (errno != ENOENT)
737 r = log_warning_errno(errno, "Opening directory \"%s\" failed, ignoring: %m", sub_path);
738
739 continue;
740 }
741
742 if (flock(dirfd(sub_dir), LOCK_EX|LOCK_NB) < 0) {
743 log_debug_errno(errno, "Couldn't acquire shared BSD lock on directory \"%s\", skipping: %m", sub_path);
744 continue;
745 }
746
747 q = dir_cleanup(c, i,
748 sub_path, sub_dir,
749 atime_nsec, mtime_nsec, cutoff_nsec,
750 rootdev_major, rootdev_minor,
751 false, maxdepth-1, false,
752 age_by_file, age_by_dir);
753 if (q < 0)
754 r = q;
755 }
756
757 /* Note: if you are wondering why we don't support the sticky bit for excluding
758 * directories from cleaning like we do it for other file system objects: well, the
759 * sticky bit already has a meaning for directories, so we don't want to overload
760 * that. */
761
762 if (keep_this_level) {
763 log_debug("Keeping directory \"%s\".", sub_path);
764 continue;
765 }
766
767 /*
768 * Check the file timestamps of an entry against the
769 * given cutoff time; delete if it is older.
770 */
771 if (!needs_cleanup(atime_nsec, btime_nsec, ctime_nsec, mtime_nsec,
772 cutoff_nsec, sub_path, age_by_dir, true))
773 continue;
774
775 log_debug("Removing directory \"%s\".", sub_path);
776 if (unlinkat(dirfd(d), de->d_name, AT_REMOVEDIR) < 0)
777 if (!IN_SET(errno, ENOENT, ENOTEMPTY))
778 r = log_warning_errno(errno, "Failed to remove directory \"%s\", ignoring: %m", sub_path);
779
780 } else {
781 _cleanup_close_ int fd = -EBADF;
782
783 /* Skip files for which the sticky bit is set. These are semantics we define, and are
784 * unknown elsewhere. See XDG_RUNTIME_DIR specification for details. */
785 if (sx.stx_mode & S_ISVTX) {
786 log_debug("Skipping \"%s\": sticky bit set.", sub_path);
787 continue;
788 }
789
790 if (mountpoint &&
791 S_ISREG(sx.stx_mode) &&
792 sx.stx_uid == 0 &&
793 STR_IN_SET(de->d_name,
794 ".journal",
795 "aquota.user",
796 "aquota.group")) {
797 log_debug("Skipping \"%s\".", sub_path);
798 continue;
799 }
800
801 /* Ignore sockets that are listed in /proc/net/unix */
802 if (S_ISSOCK(sx.stx_mode) && unix_socket_alive(c, sub_path)) {
803 log_debug("Skipping \"%s\": live socket.", sub_path);
804 continue;
805 }
806
807 /* Ignore device nodes */
808 if (S_ISCHR(sx.stx_mode) || S_ISBLK(sx.stx_mode)) {
809 log_debug("Skipping \"%s\": a device.", sub_path);
810 continue;
811 }
812
813 /* Keep files on this level around if this is requested */
814 if (keep_this_level) {
815 log_debug("Keeping \"%s\".", sub_path);
816 continue;
817 }
818
819 if (!needs_cleanup(atime_nsec, btime_nsec, ctime_nsec, mtime_nsec,
820 cutoff_nsec, sub_path, age_by_file, false))
821 continue;
822
823 fd = xopenat(dirfd(d),
824 de->d_name,
825 O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME|O_NONBLOCK,
826 /* xopen_flags = */ 0,
827 /* mode = */ 0);
828 if (fd < 0 && !IN_SET(fd, -ENOENT, -ELOOP))
829 log_warning_errno(fd, "Opening file \"%s\" failed, ignoring: %m", sub_path);
830 if (fd >= 0 && flock(fd, LOCK_EX|LOCK_NB) < 0 && errno == EAGAIN) {
831 log_debug_errno(errno, "Couldn't acquire shared BSD lock on file \"%s\", skipping: %m", sub_path);
832 continue;
833 }
834
835 log_debug("Removing \"%s\".", sub_path);
836 if (unlinkat(dirfd(d), de->d_name, 0) < 0)
837 if (errno != ENOENT)
838 r = log_warning_errno(errno, "Failed to remove \"%s\", ignoring: %m", sub_path);
839
840 deleted = true;
841 }
842 }
843
844 finish:
845 if (deleted) {
846 struct timespec ts[2];
847
848 log_debug("Restoring access and modification time on \"%s\": %s, %s",
849 p,
850 FORMAT_TIMESTAMP_STYLE(self_atime_nsec / NSEC_PER_USEC, TIMESTAMP_US),
851 FORMAT_TIMESTAMP_STYLE(self_mtime_nsec / NSEC_PER_USEC, TIMESTAMP_US));
852
853 timespec_store_nsec(ts + 0, self_atime_nsec);
854 timespec_store_nsec(ts + 1, self_mtime_nsec);
855
856 /* Restore original directory timestamps */
857 if (futimens(dirfd(d), ts) < 0)
858 log_warning_errno(errno, "Failed to revert timestamps of '%s', ignoring: %m", p);
859 }
860
861 return r;
862 }
863
864 static bool dangerous_hardlinks(void) {
865 _cleanup_free_ char *value = NULL;
866 static int cached = -1;
867 int r;
868
869 /* Check whether the fs.protected_hardlinks sysctl is on. If we can't determine it we assume its off, as that's
870 * what the upstream default is. */
871
872 if (cached >= 0)
873 return cached;
874
875 r = read_one_line_file("/proc/sys/fs/protected_hardlinks", &value);
876 if (r < 0) {
877 log_debug_errno(r, "Failed to read fs.protected_hardlinks sysctl: %m");
878 return true;
879 }
880
881 r = parse_boolean(value);
882 if (r < 0) {
883 log_debug_errno(r, "Failed to parse fs.protected_hardlinks sysctl: %m");
884 return true;
885 }
886
887 cached = r == 0;
888 return cached;
889 }
890
891 static bool hardlink_vulnerable(const struct stat *st) {
892 assert(st);
893
894 return !S_ISDIR(st->st_mode) && st->st_nlink > 1 && dangerous_hardlinks();
895 }
896
897 static mode_t process_mask_perms(mode_t mode, mode_t current) {
898
899 if ((current & 0111) == 0)
900 mode &= ~0111;
901 if ((current & 0222) == 0)
902 mode &= ~0222;
903 if ((current & 0444) == 0)
904 mode &= ~0444;
905 if (!S_ISDIR(current))
906 mode &= ~07000; /* remove sticky/sgid/suid bit, unless directory */
907
908 return mode;
909 }
910
911 static int fd_set_perms(
912 Context *c,
913 Item *i,
914 int fd,
915 const char *path,
916 const struct stat *st,
917 CreationMode creation) {
918
919 bool do_chown, do_chmod;
920 struct stat stbuf;
921 mode_t new_mode;
922 uid_t new_uid;
923 gid_t new_gid;
924 int r;
925
926 assert(c);
927 assert(i);
928 assert(fd >= 0);
929 assert(path);
930
931 if (!i->mode_set && !i->uid_set && !i->gid_set)
932 goto shortcut;
933
934 if (!st) {
935 if (fstat(fd, &stbuf) < 0)
936 return log_error_errno(errno, "fstat(%s) failed: %m", path);
937 st = &stbuf;
938 }
939
940 if (hardlink_vulnerable(st))
941 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
942 "Refusing to set permissions on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.",
943 path);
944 new_uid = i->uid_set && (creation != CREATION_EXISTING || !i->uid_only_create) ? i->uid : st->st_uid;
945 new_gid = i->gid_set && (creation != CREATION_EXISTING || !i->gid_only_create) ? i->gid : st->st_gid;
946
947 /* Do we need a chown()? */
948 do_chown = (new_uid != st->st_uid) || (new_gid != st->st_gid);
949
950 /* Calculate the mode to apply */
951 new_mode = i->mode_set && (creation != CREATION_EXISTING || !i->mode_only_create) ?
952 (i->mask_perms ? process_mask_perms(i->mode, st->st_mode) : i->mode) :
953 (st->st_mode & 07777);
954
955 do_chmod = ((new_mode ^ st->st_mode) & 07777) != 0;
956
957 if (do_chmod && do_chown) {
958 /* Before we issue the chmod() let's reduce the access mode to the common bits of the old and
959 * the new mode. That way there's no time window where the file exists under the old owner
960 * with more than the old access modes — and not under the new owner with more than the new
961 * access modes either. */
962
963 if (S_ISLNK(st->st_mode))
964 log_debug("Skipping temporary mode fix for symlink %s.", path);
965 else {
966 mode_t m = new_mode & st->st_mode; /* Mask new mode by old mode */
967
968 if (((m ^ st->st_mode) & 07777) == 0)
969 log_debug("\"%s\" matches temporary mode %o already.", path, m);
970 else {
971 log_debug("Temporarily changing \"%s\" to mode %o.", path, m);
972 r = fchmod_opath(fd, m);
973 if (r < 0)
974 return log_error_errno(r, "fchmod() of %s failed: %m", path);
975 }
976 }
977 }
978
979 if (do_chown) {
980 log_debug("Changing \"%s\" to owner "UID_FMT":"GID_FMT, path, new_uid, new_gid);
981
982 if (fchownat(fd, "",
983 new_uid != st->st_uid ? new_uid : UID_INVALID,
984 new_gid != st->st_gid ? new_gid : GID_INVALID,
985 AT_EMPTY_PATH) < 0)
986 return log_error_errno(errno, "fchownat() of %s failed: %m", path);
987 }
988
989 /* Now, apply the final mode. We do this in two cases: when the user set a mode explicitly, or after a
990 * chown(), since chown()'s mangle the access mode in regards to sgid/suid in some conditions. */
991 if (do_chmod || do_chown) {
992 if (S_ISLNK(st->st_mode))
993 log_debug("Skipping mode fix for symlink %s.", path);
994 else {
995 log_debug("Changing \"%s\" to mode %o.", path, new_mode);
996 r = fchmod_opath(fd, new_mode);
997 if (r < 0)
998 return log_error_errno(r, "fchmod() of %s failed: %m", path);
999 }
1000 }
1001
1002 shortcut:
1003 return label_fix_full(fd, /* inode_path= */ NULL, /* label_path= */ path, 0);
1004 }
1005
1006 static int path_open_parent_safe(const char *path, bool allow_failure) {
1007 _cleanup_free_ char *dn = NULL;
1008 int r, fd;
1009
1010 if (!path_is_normalized(path))
1011 return log_full_errno(allow_failure ? LOG_INFO : LOG_ERR,
1012 SYNTHETIC_ERRNO(EINVAL),
1013 "Failed to open parent of '%s': path not normalized%s.",
1014 path,
1015 allow_failure ? ", ignoring" : "");
1016
1017 r = path_extract_directory(path, &dn);
1018 if (r < 0)
1019 return log_full_errno(allow_failure ? LOG_INFO : LOG_ERR,
1020 r,
1021 "Unable to determine parent directory of '%s'%s: %m",
1022 path,
1023 allow_failure ? ", ignoring" : "");
1024
1025 r = chase(dn, arg_root, allow_failure ? CHASE_SAFE : CHASE_SAFE|CHASE_WARN, NULL, &fd);
1026 if (r == -ENOLINK) /* Unsafe symlink: already covered by CHASE_WARN */
1027 return r;
1028 if (r < 0)
1029 return log_full_errno(allow_failure ? LOG_INFO : LOG_ERR,
1030 r,
1031 "Failed to open path '%s'%s: %m",
1032 dn,
1033 allow_failure ? ", ignoring" : "");
1034
1035 return fd;
1036 }
1037
1038 static int path_open_safe(const char *path) {
1039 int r, fd;
1040
1041 /* path_open_safe() returns a file descriptor opened with O_PATH after
1042 * verifying that the path doesn't contain unsafe transitions, except
1043 * for its final component as the function does not follow symlink. */
1044
1045 assert(path);
1046
1047 if (!path_is_normalized(path))
1048 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to open invalid path '%s'.", path);
1049
1050 r = chase(path, arg_root, CHASE_SAFE|CHASE_WARN|CHASE_NOFOLLOW, NULL, &fd);
1051 if (r == -ENOLINK)
1052 return r; /* Unsafe symlink: already covered by CHASE_WARN */
1053 if (r < 0)
1054 return log_error_errno(r, "Failed to open path %s: %m", path);
1055
1056 return fd;
1057 }
1058
1059 static int path_set_perms(
1060 Context *c,
1061 Item *i,
1062 const char *path,
1063 CreationMode creation) {
1064
1065 _cleanup_close_ int fd = -EBADF;
1066
1067 assert(c);
1068 assert(i);
1069 assert(path);
1070
1071 fd = path_open_safe(path);
1072 if (fd < 0)
1073 return fd;
1074
1075 return fd_set_perms(c, i, fd, path, /* st= */ NULL, creation);
1076 }
1077
1078 static int parse_xattrs_from_arg(Item *i) {
1079 const char *p;
1080 int r;
1081
1082 assert(i);
1083
1084 assert_se(p = i->argument);
1085 for (;;) {
1086 _cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL;
1087
1088 r = extract_first_word(&p, &xattr, NULL, EXTRACT_UNQUOTE|EXTRACT_CUNESCAPE);
1089 if (r < 0)
1090 log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p);
1091 if (r <= 0)
1092 break;
1093
1094 r = split_pair(xattr, "=", &name, &value);
1095 if (r < 0) {
1096 log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr);
1097 continue;
1098 }
1099
1100 if (isempty(name) || isempty(value)) {
1101 log_warning("Malformed extended attribute found, ignoring: %s", xattr);
1102 continue;
1103 }
1104
1105 if (strv_push_pair(&i->xattrs, name, value) < 0)
1106 return log_oom();
1107
1108 name = value = NULL;
1109 }
1110
1111 return 0;
1112 }
1113
1114 static int fd_set_xattrs(
1115 Context *c,
1116 Item *i,
1117 int fd,
1118 const char *path,
1119 const struct stat *st,
1120 CreationMode creation) {
1121
1122 assert(c);
1123 assert(i);
1124 assert(fd >= 0);
1125 assert(path);
1126
1127 STRV_FOREACH_PAIR(name, value, i->xattrs) {
1128 log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path);
1129 if (setxattr(FORMAT_PROC_FD_PATH(fd), *name, *value, strlen(*value), 0) < 0)
1130 return log_error_errno(errno, "Setting extended attribute %s=%s on %s failed: %m",
1131 *name, *value, path);
1132 }
1133 return 0;
1134 }
1135
1136 static int path_set_xattrs(
1137 Context *c,
1138 Item *i,
1139 const char *path,
1140 CreationMode creation) {
1141
1142 _cleanup_close_ int fd = -EBADF;
1143
1144 assert(c);
1145 assert(i);
1146 assert(path);
1147
1148 fd = path_open_safe(path);
1149 if (fd < 0)
1150 return fd;
1151
1152 return fd_set_xattrs(c, i, fd, path, /* st = */ NULL, creation);
1153 }
1154
1155 static int parse_acls_from_arg(Item *item) {
1156 #if HAVE_ACL
1157 int r;
1158
1159 assert(item);
1160
1161 /* If append_or_force (= modify) is set, we will not modify the acl
1162 * afterwards, so the mask can be added now if necessary. */
1163
1164 r = parse_acl(item->argument, &item->acl_access, &item->acl_access_exec,
1165 &item->acl_default, !item->append_or_force);
1166 if (r < 0)
1167 log_full_errno(arg_graceful && IN_SET(r, -EINVAL, -ENOENT, -ESRCH) ? LOG_DEBUG : LOG_WARNING,
1168 r, "Failed to parse ACL \"%s\", ignoring: %m", item->argument);
1169 #else
1170 log_warning("ACLs are not supported, ignoring.");
1171 #endif
1172
1173 return 0;
1174 }
1175
1176 #if HAVE_ACL
1177 static int parse_acl_cond_exec(
1178 const char *path,
1179 acl_t access, /* could be empty (NULL) */
1180 acl_t cond_exec,
1181 const struct stat *st,
1182 bool append,
1183 acl_t *ret) {
1184
1185 _cleanup_(acl_freep) acl_t parsed = NULL;
1186 acl_entry_t entry;
1187 acl_permset_t permset;
1188 bool has_exec;
1189 int r;
1190
1191 assert(path);
1192 assert(ret);
1193 assert(st);
1194
1195 parsed = access ? acl_dup(access) : acl_init(0);
1196 if (!parsed)
1197 return -errno;
1198
1199 /* Since we substitute 'X' with 'x' in parse_acl(), we just need to copy the entries over
1200 * for directories */
1201 if (S_ISDIR(st->st_mode)) {
1202 for (r = acl_get_entry(cond_exec, ACL_FIRST_ENTRY, &entry);
1203 r > 0;
1204 r = acl_get_entry(cond_exec, ACL_NEXT_ENTRY, &entry)) {
1205
1206 acl_entry_t parsed_entry;
1207
1208 if (acl_create_entry(&parsed, &parsed_entry) < 0)
1209 return -errno;
1210
1211 if (acl_copy_entry(parsed_entry, entry) < 0)
1212 return -errno;
1213 }
1214 if (r < 0)
1215 return -errno;
1216
1217 goto finish;
1218 }
1219
1220 has_exec = st->st_mode & S_IXUSR;
1221
1222 if (!has_exec && append) {
1223 _cleanup_(acl_freep) acl_t old = NULL;
1224
1225 old = acl_get_file(path, ACL_TYPE_ACCESS);
1226 if (!old)
1227 return -errno;
1228
1229 for (r = acl_get_entry(old, ACL_FIRST_ENTRY, &entry);
1230 r > 0;
1231 r = acl_get_entry(old, ACL_NEXT_ENTRY, &entry)) {
1232
1233 if (acl_get_permset(entry, &permset) < 0)
1234 return -errno;
1235
1236 r = acl_get_perm(permset, ACL_EXECUTE);
1237 if (r < 0)
1238 return -errno;
1239 if (r > 0) {
1240 has_exec = true;
1241 break;
1242 }
1243 }
1244 if (r < 0)
1245 return -errno;
1246 }
1247
1248 /* Check if we're about to set the execute bit in acl_access */
1249 if (!has_exec && access) {
1250 for (r = acl_get_entry(access, ACL_FIRST_ENTRY, &entry);
1251 r > 0;
1252 r = acl_get_entry(access, ACL_NEXT_ENTRY, &entry)) {
1253
1254 if (acl_get_permset(entry, &permset) < 0)
1255 return -errno;
1256
1257 r = acl_get_perm(permset, ACL_EXECUTE);
1258 if (r < 0)
1259 return -errno;
1260 if (r > 0) {
1261 has_exec = true;
1262 break;
1263 }
1264 }
1265 if (r < 0)
1266 return -errno;
1267 }
1268
1269 for (r = acl_get_entry(cond_exec, ACL_FIRST_ENTRY, &entry);
1270 r > 0;
1271 r = acl_get_entry(cond_exec, ACL_NEXT_ENTRY, &entry)) {
1272
1273 acl_entry_t parsed_entry;
1274
1275 if (acl_create_entry(&parsed, &parsed_entry) < 0)
1276 return -errno;
1277
1278 if (acl_copy_entry(parsed_entry, entry) < 0)
1279 return -errno;
1280
1281 if (!has_exec) {
1282 if (acl_get_permset(parsed_entry, &permset) < 0)
1283 return -errno;
1284
1285 if (acl_delete_perm(permset, ACL_EXECUTE) < 0)
1286 return -errno;
1287 }
1288 }
1289 if (r < 0)
1290 return -errno;
1291
1292 finish:
1293 if (!append) { /* want_mask = true */
1294 r = calc_acl_mask_if_needed(&parsed);
1295 if (r < 0)
1296 return r;
1297 }
1298
1299 *ret = TAKE_PTR(parsed);
1300
1301 return 0;
1302 }
1303
1304 static int path_set_acl(
1305 Context *c,
1306 const char *path,
1307 const char *pretty,
1308 acl_type_t type,
1309 acl_t acl,
1310 bool modify) {
1311
1312 _cleanup_(acl_free_charpp) char *t = NULL;
1313 _cleanup_(acl_freep) acl_t dup = NULL;
1314 int r;
1315
1316 assert(c);
1317
1318 /* Returns 0 for success, positive error if already warned, negative error otherwise. */
1319
1320 if (modify) {
1321 r = acls_for_file(path, type, acl, &dup);
1322 if (r < 0)
1323 return r;
1324
1325 r = calc_acl_mask_if_needed(&dup);
1326 if (r < 0)
1327 return r;
1328 } else {
1329 dup = acl_dup(acl);
1330 if (!dup)
1331 return -errno;
1332
1333 /* the mask was already added earlier if needed */
1334 }
1335
1336 r = add_base_acls_if_needed(&dup, path);
1337 if (r < 0)
1338 return r;
1339
1340 t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);
1341 log_debug("Setting %s ACL %s on %s.",
1342 type == ACL_TYPE_ACCESS ? "access" : "default",
1343 strna(t), pretty);
1344
1345 r = acl_set_file(path, type, dup);
1346 if (r < 0) {
1347 if (ERRNO_IS_NOT_SUPPORTED(errno))
1348 /* No error if filesystem doesn't support ACLs. Return negative. */
1349 return -errno;
1350 else
1351 /* Return positive to indicate we already warned */
1352 return -log_error_errno(errno,
1353 "Setting %s ACL \"%s\" on %s failed: %m",
1354 type == ACL_TYPE_ACCESS ? "access" : "default",
1355 strna(t), pretty);
1356 }
1357 return 0;
1358 }
1359 #endif
1360
1361 static int fd_set_acls(
1362 Context *c,
1363 Item *item,
1364 int fd,
1365 const char *path,
1366 const struct stat *st,
1367 CreationMode creation) {
1368
1369 int r = 0;
1370 #if HAVE_ACL
1371 _cleanup_(acl_freep) acl_t access_with_exec_parsed = NULL;
1372 struct stat stbuf;
1373
1374 assert(c);
1375 assert(item);
1376 assert(fd >= 0);
1377 assert(path);
1378
1379 if (!st) {
1380 if (fstat(fd, &stbuf) < 0)
1381 return log_error_errno(errno, "fstat(%s) failed: %m", path);
1382 st = &stbuf;
1383 }
1384
1385 if (hardlink_vulnerable(st))
1386 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
1387 "Refusing to set ACLs on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.",
1388 path);
1389
1390 if (S_ISLNK(st->st_mode)) {
1391 log_debug("Skipping ACL fix for symlink %s.", path);
1392 return 0;
1393 }
1394
1395 if (item->acl_access_exec) {
1396 r = parse_acl_cond_exec(FORMAT_PROC_FD_PATH(fd),
1397 item->acl_access,
1398 item->acl_access_exec,
1399 st,
1400 item->append_or_force,
1401 &access_with_exec_parsed);
1402 if (r < 0)
1403 return log_error_errno(r, "Failed to parse conditionalized execute bit for \"%s\": %m", path);
1404
1405 r = path_set_acl(c, FORMAT_PROC_FD_PATH(fd), path, ACL_TYPE_ACCESS, access_with_exec_parsed, item->append_or_force);
1406 } else if (item->acl_access)
1407 r = path_set_acl(c, FORMAT_PROC_FD_PATH(fd), path, ACL_TYPE_ACCESS, item->acl_access, item->append_or_force);
1408
1409 /* set only default acls to folders */
1410 if (r == 0 && item->acl_default && S_ISDIR(st->st_mode))
1411 r = path_set_acl(c, FORMAT_PROC_FD_PATH(fd), path, ACL_TYPE_DEFAULT, item->acl_default, item->append_or_force);
1412
1413 if (ERRNO_IS_NOT_SUPPORTED(r)) {
1414 log_debug_errno(r, "ACLs not supported by file system at %s", path);
1415 return 0;
1416 }
1417
1418 if (r > 0)
1419 return -r; /* already warned in path_set_acl */
1420
1421 /* The above procfs paths don't work if /proc is not mounted. */
1422 if (r == -ENOENT && proc_mounted() == 0)
1423 r = -ENOSYS;
1424
1425 if (r < 0)
1426 return log_error_errno(r, "ACL operation on \"%s\" failed: %m", path);
1427 #endif
1428 return r;
1429 }
1430
1431 static int path_set_acls(
1432 Context *c,
1433 Item *item,
1434 const char *path,
1435 CreationMode creation) {
1436
1437 int r = 0;
1438 #if HAVE_ACL
1439 _cleanup_close_ int fd = -EBADF;
1440
1441 assert(c);
1442 assert(item);
1443 assert(path);
1444
1445 fd = path_open_safe(path);
1446 if (fd < 0)
1447 return fd;
1448
1449 r = fd_set_acls(c, item, fd, path, /* st= */ NULL, creation);
1450 #endif
1451 return r;
1452 }
1453
1454 static int parse_attribute_from_arg(Item *item) {
1455
1456 static const struct {
1457 char character;
1458 unsigned value;
1459 } attributes[] = {
1460 { 'A', FS_NOATIME_FL }, /* do not update atime */
1461 { 'S', FS_SYNC_FL }, /* Synchronous updates */
1462 { 'D', FS_DIRSYNC_FL }, /* dirsync behaviour (directories only) */
1463 { 'a', FS_APPEND_FL }, /* writes to file may only append */
1464 { 'c', FS_COMPR_FL }, /* Compress file */
1465 { 'd', FS_NODUMP_FL }, /* do not dump file */
1466 { 'e', FS_EXTENT_FL }, /* Extents */
1467 { 'i', FS_IMMUTABLE_FL }, /* Immutable file */
1468 { 'j', FS_JOURNAL_DATA_FL }, /* Reserved for ext3 */
1469 { 's', FS_SECRM_FL }, /* Secure deletion */
1470 { 'u', FS_UNRM_FL }, /* Undelete */
1471 { 't', FS_NOTAIL_FL }, /* file tail should not be merged */
1472 { 'T', FS_TOPDIR_FL }, /* Top of directory hierarchies */
1473 { 'C', FS_NOCOW_FL }, /* Do not cow file */
1474 { 'P', FS_PROJINHERIT_FL }, /* Inherit the quota project ID */
1475 };
1476
1477 enum {
1478 MODE_ADD,
1479 MODE_DEL,
1480 MODE_SET
1481 } mode = MODE_ADD;
1482
1483 unsigned value = 0, mask = 0;
1484 const char *p;
1485
1486 assert(item);
1487
1488 p = item->argument;
1489 if (p) {
1490 if (*p == '+') {
1491 mode = MODE_ADD;
1492 p++;
1493 } else if (*p == '-') {
1494 mode = MODE_DEL;
1495 p++;
1496 } else if (*p == '=') {
1497 mode = MODE_SET;
1498 p++;
1499 }
1500 }
1501
1502 if (isempty(p) && mode != MODE_SET)
1503 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1504 "Setting file attribute on '%s' needs an attribute specification.",
1505 item->path);
1506
1507 for (; p && *p ; p++) {
1508 unsigned i, v;
1509
1510 for (i = 0; i < ELEMENTSOF(attributes); i++)
1511 if (*p == attributes[i].character)
1512 break;
1513
1514 if (i >= ELEMENTSOF(attributes))
1515 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1516 "Unknown file attribute '%c' on '%s'.",
1517 *p, item->path);
1518
1519 v = attributes[i].value;
1520
1521 SET_FLAG(value, v, IN_SET(mode, MODE_ADD, MODE_SET));
1522
1523 mask |= v;
1524 }
1525
1526 if (mode == MODE_SET)
1527 mask |= CHATTR_ALL_FL;
1528
1529 assert(mask != 0);
1530
1531 item->attribute_mask = mask;
1532 item->attribute_value = value;
1533 item->attribute_set = true;
1534
1535 return 0;
1536 }
1537
1538 static int fd_set_attribute(
1539 Context *c,
1540 Item *item,
1541 int fd,
1542 const char *path,
1543 const struct stat *st,
1544 CreationMode creation) {
1545
1546 _cleanup_close_ int procfs_fd = -EBADF;
1547 struct stat stbuf;
1548 unsigned f;
1549 int r;
1550
1551 assert(c);
1552 assert(item);
1553 assert(fd >= 0);
1554 assert(path);
1555
1556 if (!item->attribute_set || item->attribute_mask == 0)
1557 return 0;
1558
1559 if (!st) {
1560 if (fstat(fd, &stbuf) < 0)
1561 return log_error_errno(errno, "fstat(%s) failed: %m", path);
1562 st = &stbuf;
1563 }
1564
1565 /* Issuing the file attribute ioctls on device nodes is not safe, as that will be delivered to the
1566 * drivers, not the file system containing the device node. */
1567 if (!S_ISREG(st->st_mode) && !S_ISDIR(st->st_mode))
1568 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1569 "Setting file flags is only supported on regular files and directories, cannot set on '%s'.",
1570 path);
1571
1572 f = item->attribute_value & item->attribute_mask;
1573
1574 /* Mask away directory-specific flags */
1575 if (!S_ISDIR(st->st_mode))
1576 f &= ~FS_DIRSYNC_FL;
1577
1578 procfs_fd = fd_reopen(fd, O_RDONLY|O_CLOEXEC|O_NOATIME);
1579 if (procfs_fd < 0)
1580 return log_error_errno(procfs_fd, "Failed to re-open '%s': %m", path);
1581
1582 unsigned previous, current;
1583 r = chattr_full(procfs_fd, NULL, f, item->attribute_mask, &previous, &current, CHATTR_FALLBACK_BITWISE);
1584 if (r == -ENOANO)
1585 log_warning("Cannot set file attributes for '%s', maybe due to incompatibility in specified attributes, "
1586 "previous=0x%08x, current=0x%08x, expected=0x%08x, ignoring.",
1587 path, previous, current, (previous & ~item->attribute_mask) | (f & item->attribute_mask));
1588 else if (r < 0)
1589 log_full_errno(ERRNO_IS_NOT_SUPPORTED(r) ? LOG_DEBUG : LOG_WARNING, r,
1590 "Cannot set file attributes for '%s', value=0x%08x, mask=0x%08x, ignoring: %m",
1591 path, item->attribute_value, item->attribute_mask);
1592
1593 return 0;
1594 }
1595
1596 static int path_set_attribute(
1597 Context *c,
1598 Item *item,
1599 const char *path,
1600 CreationMode creation) {
1601
1602 _cleanup_close_ int fd = -EBADF;
1603
1604 assert(c);
1605 assert(item);
1606
1607 if (!item->attribute_set || item->attribute_mask == 0)
1608 return 0;
1609
1610 fd = path_open_safe(path);
1611 if (fd < 0)
1612 return fd;
1613
1614 return fd_set_attribute(c, item, fd, path, /* st= */ NULL, creation);
1615 }
1616
1617 static int write_argument_data(Item *i, int fd, const char *path) {
1618 int r;
1619
1620 assert(i);
1621 assert(fd >= 0);
1622 assert(path);
1623
1624 if (item_binary_argument_size(i) == 0)
1625 return 0;
1626
1627 assert(item_binary_argument(i));
1628
1629 log_debug("Writing to \"%s\".", path);
1630
1631 r = loop_write(fd, item_binary_argument(i), item_binary_argument_size(i));
1632 if (r < 0)
1633 return log_error_errno(r, "Failed to write file \"%s\": %m", path);
1634
1635 return 0;
1636 }
1637
1638 static int write_one_file(Context *c, Item *i, const char *path, CreationMode creation) {
1639 _cleanup_close_ int fd = -EBADF, dir_fd = -EBADF;
1640 _cleanup_free_ char *bn = NULL;
1641 int r;
1642
1643 assert(c);
1644 assert(i);
1645 assert(path);
1646 assert(i->type == WRITE_FILE);
1647
1648 r = path_extract_filename(path, &bn);
1649 if (r < 0)
1650 return log_error_errno(r, "Failed to extract filename from path '%s': %m", path);
1651 if (r == O_DIRECTORY)
1652 return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Cannot open path '%s' for writing, is a directory.", path);
1653
1654 /* Validate the path and keep the fd on the directory for opening the file so we're sure that it
1655 * can't be changed behind our back. */
1656 dir_fd = path_open_parent_safe(path, i->allow_failure);
1657 if (dir_fd < 0)
1658 return dir_fd;
1659
1660 /* Follows symlinks */
1661 fd = openat(dir_fd, bn,
1662 O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY|(i->append_or_force ? O_APPEND : 0),
1663 i->mode);
1664 if (fd < 0) {
1665 if (errno == ENOENT) {
1666 log_debug_errno(errno, "Not writing missing file \"%s\": %m", path);
1667 return 0;
1668 }
1669
1670 if (i->allow_failure)
1671 return log_debug_errno(errno, "Failed to open file \"%s\", ignoring: %m", path);
1672
1673 return log_error_errno(errno, "Failed to open file \"%s\": %m", path);
1674 }
1675
1676 /* 'w' is allowed to write into any kind of files. */
1677
1678 r = write_argument_data(i, fd, path);
1679 if (r < 0)
1680 return r;
1681
1682 return fd_set_perms(c, i, fd, path, NULL, creation);
1683 }
1684
1685 static int create_file(
1686 Context *c,
1687 Item *i,
1688 const char *path) {
1689
1690 _cleanup_close_ int fd = -EBADF, dir_fd = -EBADF;
1691 _cleanup_free_ char *bn = NULL;
1692 struct stat stbuf, *st = NULL;
1693 CreationMode creation;
1694 int r = 0;
1695
1696 assert(c);
1697 assert(i);
1698 assert(path);
1699 assert(i->type == CREATE_FILE);
1700
1701 /* 'f' operates on regular files exclusively. */
1702
1703 r = path_extract_filename(path, &bn);
1704 if (r < 0)
1705 return log_error_errno(r, "Failed to extract filename from path '%s': %m", path);
1706 if (r == O_DIRECTORY)
1707 return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Cannot open path '%s' for writing, is a directory.", path);
1708
1709 /* Validate the path and keep the fd on the directory for opening the file so we're sure that it
1710 * can't be changed behind our back. */
1711 dir_fd = path_open_parent_safe(path, i->allow_failure);
1712 if (dir_fd < 0)
1713 return dir_fd;
1714
1715 WITH_UMASK(0000) {
1716 mac_selinux_create_file_prepare(path, S_IFREG);
1717 fd = RET_NERRNO(openat(dir_fd, bn, O_CREAT|O_EXCL|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode));
1718 mac_selinux_create_file_clear();
1719 }
1720
1721 if (fd < 0) {
1722 /* Even on a read-only filesystem, open(2) returns EEXIST if the file already exists. It
1723 * returns EROFS only if it needs to create the file. */
1724 if (fd != -EEXIST)
1725 return log_error_errno(fd, "Failed to create file %s: %m", path);
1726
1727 /* Re-open the file. At that point it must exist since open(2) failed with EEXIST. We still
1728 * need to check if the perms/mode need to be changed. For read-only filesystems, we let
1729 * fd_set_perms() report the error if the perms need to be modified. */
1730 fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
1731 if (fd < 0)
1732 return log_error_errno(errno, "Failed to re-open file %s: %m", path);
1733
1734 if (fstat(fd, &stbuf) < 0)
1735 return log_error_errno(errno, "stat(%s) failed: %m", path);
1736
1737 if (!S_ISREG(stbuf.st_mode))
1738 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
1739 "%s exists and is not a regular file.",
1740 path);
1741
1742 st = &stbuf;
1743 creation = CREATION_EXISTING;
1744 } else {
1745 r = write_argument_data(i, fd, path);
1746 if (r < 0)
1747 return r;
1748
1749 creation = CREATION_NORMAL;
1750 }
1751
1752 return fd_set_perms(c, i, fd, path, st, creation);
1753 }
1754
1755 static int truncate_file(
1756 Context *c,
1757 Item *i,
1758 const char *path) {
1759
1760 _cleanup_close_ int fd = -EBADF, dir_fd = -EBADF;
1761 _cleanup_free_ char *bn = NULL;
1762 struct stat stbuf, *st = NULL;
1763 CreationMode creation;
1764 bool erofs = false;
1765 int r = 0;
1766
1767 assert(c);
1768 assert(i);
1769 assert(path);
1770 assert(i->type == TRUNCATE_FILE || (i->type == CREATE_FILE && i->append_or_force));
1771
1772 /* We want to operate on regular file exclusively especially since O_TRUNC is unspecified if the file
1773 * is neither a regular file nor a fifo nor a terminal device. Therefore we first open the file and
1774 * make sure it's a regular one before truncating it. */
1775
1776 r = path_extract_filename(path, &bn);
1777 if (r < 0)
1778 return log_error_errno(r, "Failed to extract filename from path '%s': %m", path);
1779 if (r == O_DIRECTORY)
1780 return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Cannot open path '%s' for truncation, is a directory.", path);
1781
1782 /* Validate the path and keep the fd on the directory for opening the file so we're sure that it
1783 * can't be changed behind our back. */
1784 dir_fd = path_open_parent_safe(path, i->allow_failure);
1785 if (dir_fd < 0)
1786 return dir_fd;
1787
1788 creation = CREATION_EXISTING;
1789 fd = RET_NERRNO(openat(dir_fd, bn, O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode));
1790 if (fd == -ENOENT) {
1791 creation = CREATION_NORMAL; /* Didn't work without O_CREATE, try again with */
1792
1793 WITH_UMASK(0000) {
1794 mac_selinux_create_file_prepare(path, S_IFREG);
1795 fd = RET_NERRNO(openat(dir_fd, bn, O_CREAT|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode));
1796 mac_selinux_create_file_clear();
1797 }
1798 }
1799
1800 if (fd < 0) {
1801 if (fd != -EROFS)
1802 return log_error_errno(fd, "Failed to open/create file %s: %m", path);
1803
1804 /* On a read-only filesystem, we don't want to fail if the target is already empty and the
1805 * perms are set. So we still proceed with the sanity checks and let the remaining operations
1806 * fail with EROFS if they try to modify the target file. */
1807
1808 fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
1809 if (fd < 0) {
1810 if (errno == ENOENT)
1811 return log_error_errno(SYNTHETIC_ERRNO(EROFS),
1812 "Cannot create file %s on a read-only file system.",
1813 path);
1814
1815 return log_error_errno(errno, "Failed to re-open file %s: %m", path);
1816 }
1817
1818 erofs = true;
1819 creation = CREATION_EXISTING;
1820 }
1821
1822 if (fstat(fd, &stbuf) < 0)
1823 return log_error_errno(errno, "stat(%s) failed: %m", path);
1824
1825 if (!S_ISREG(stbuf.st_mode))
1826 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
1827 "%s exists and is not a regular file.",
1828 path);
1829
1830 if (stbuf.st_size > 0) {
1831 if (ftruncate(fd, 0) < 0) {
1832 r = erofs ? -EROFS : -errno;
1833 return log_error_errno(r, "Failed to truncate file %s: %m", path);
1834 }
1835 } else
1836 st = &stbuf;
1837
1838 log_debug("\"%s\" has been created.", path);
1839
1840 if (item_binary_argument(i)) {
1841 r = write_argument_data(i, fd, path);
1842 if (r < 0)
1843 return r;
1844 }
1845
1846 return fd_set_perms(c, i, fd, path, st, creation);
1847 }
1848
1849 static int copy_files(Context *c, Item *i) {
1850 _cleanup_close_ int dfd = -EBADF, fd = -EBADF;
1851 _cleanup_free_ char *bn = NULL;
1852 struct stat st, a;
1853 int r;
1854
1855 log_debug("Copying tree \"%s\" to \"%s\".", i->argument, i->path);
1856
1857 r = path_extract_filename(i->path, &bn);
1858 if (r < 0)
1859 return log_error_errno(r, "Failed to extract filename from path '%s': %m", i->path);
1860
1861 /* Validate the path and use the returned directory fd for copying the target so we're sure that the
1862 * path can't be changed behind our back. */
1863 dfd = path_open_parent_safe(i->path, i->allow_failure);
1864 if (dfd < 0)
1865 return dfd;
1866
1867 r = copy_tree_at(AT_FDCWD, i->argument,
1868 dfd, bn,
1869 i->uid_set ? i->uid : UID_INVALID,
1870 i->gid_set ? i->gid : GID_INVALID,
1871 COPY_REFLINK | ((i->append_or_force) ? COPY_MERGE : COPY_MERGE_EMPTY) | COPY_MAC_CREATE | COPY_HARDLINKS,
1872 NULL, NULL);
1873
1874 fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1875 if (fd < 0) {
1876 if (r < 0) /* Look at original error first */
1877 return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
1878
1879 return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
1880 }
1881
1882 if (fstat(fd, &st) < 0)
1883 return log_error_errno(errno, "Failed to fstat(%s): %m", i->path);
1884
1885 if (stat(i->argument, &a) < 0)
1886 return log_error_errno(errno, "Failed to stat(%s): %m", i->argument);
1887
1888 if (((st.st_mode ^ a.st_mode) & S_IFMT) != 0) {
1889 log_debug("Can't copy to %s, file exists already and is of different type", i->path);
1890 return 0;
1891 }
1892
1893 return fd_set_perms(c, i, fd, i->path, &st, _CREATION_MODE_INVALID);
1894 }
1895
1896 static int create_directory_or_subvolume(
1897 const char *path,
1898 mode_t mode,
1899 bool subvol,
1900 bool allow_failure,
1901 struct stat *ret_st,
1902 CreationMode *ret_creation) {
1903
1904 _cleanup_free_ char *bn = NULL;
1905 _cleanup_close_ int pfd = -EBADF;
1906 CreationMode creation;
1907 struct stat st;
1908 int r, fd;
1909
1910 assert(path);
1911
1912 r = path_extract_filename(path, &bn);
1913 if (r < 0)
1914 return log_error_errno(r, "Failed to extract filename from path '%s': %m", path);
1915
1916 pfd = path_open_parent_safe(path, allow_failure);
1917 if (pfd < 0)
1918 return pfd;
1919
1920 if (subvol) {
1921 r = getenv_bool("SYSTEMD_TMPFILES_FORCE_SUBVOL");
1922 if (r < 0) {
1923 if (r != -ENXIO) /* env var is unset */
1924 log_warning_errno(r, "Cannot parse value of $SYSTEMD_TMPFILES_FORCE_SUBVOL, ignoring.");
1925 r = btrfs_is_subvol(empty_to_root(arg_root)) > 0;
1926 }
1927 if (r == 0)
1928 /* Don't create a subvolume unless the root directory is one, too. We do this under
1929 * the assumption that if the root directory is just a plain directory (i.e. very
1930 * light-weight), we shouldn't try to split it up into subvolumes (i.e. more
1931 * heavy-weight). Thus, chroot() environments and suchlike will get a full brtfs
1932 * subvolume set up below their tree only if they specifically set up a btrfs
1933 * subvolume for the root dir too. */
1934
1935 subvol = false;
1936 else {
1937 WITH_UMASK((~mode) & 0777)
1938 r = btrfs_subvol_make(pfd, bn);
1939 }
1940 } else
1941 r = 0;
1942
1943 if (!subvol || ERRNO_IS_NEG_NOT_SUPPORTED(r))
1944 WITH_UMASK(0000)
1945 r = mkdirat_label(pfd, bn, mode);
1946
1947 creation = r >= 0 ? CREATION_NORMAL : CREATION_EXISTING;
1948
1949 fd = openat(pfd, bn, O_NOFOLLOW|O_CLOEXEC|O_DIRECTORY|O_PATH);
1950 if (fd < 0) {
1951 /* We couldn't open it because it is not actually a directory? */
1952 if (errno == ENOTDIR)
1953 return log_error_errno(SYNTHETIC_ERRNO(EEXIST), "\"%s\" already exists and is not a directory.", path);
1954
1955 /* Then look at the original error */
1956 if (r < 0)
1957 return log_full_errno(allow_failure ? LOG_INFO : LOG_ERR,
1958 r,
1959 "Failed to create directory or subvolume \"%s\"%s: %m",
1960 path,
1961 allow_failure ? ", ignoring" : "");
1962
1963 return log_error_errno(errno, "Failed to open directory/subvolume we just created '%s': %m", path);
1964 }
1965
1966 if (fstat(fd, &st) < 0)
1967 return log_error_errno(errno, "Failed to fstat(%s): %m", path);
1968
1969 assert(S_ISDIR(st.st_mode)); /* we used O_DIRECTORY above */
1970
1971 log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), path);
1972
1973 if (ret_st)
1974 *ret_st = st;
1975 if (ret_creation)
1976 *ret_creation = creation;
1977
1978 return fd;
1979 }
1980
1981 static int create_directory(
1982 Context *c,
1983 Item *i,
1984 const char *path) {
1985
1986 _cleanup_close_ int fd = -EBADF;
1987 CreationMode creation;
1988 struct stat st;
1989
1990 assert(c);
1991 assert(i);
1992 assert(IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY));
1993
1994 fd = create_directory_or_subvolume(path, i->mode, /* subvol= */ false, i->allow_failure, &st, &creation);
1995 if (fd == -EEXIST)
1996 return 0;
1997 if (fd < 0)
1998 return fd;
1999
2000 return fd_set_perms(c, i, fd, path, &st, creation);
2001 }
2002
2003 static int create_subvolume(
2004 Context *c,
2005 Item *i,
2006 const char *path) {
2007
2008 _cleanup_close_ int fd = -EBADF;
2009 CreationMode creation;
2010 struct stat st;
2011 int r, q = 0;
2012
2013 assert(c);
2014 assert(i);
2015 assert(IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA));
2016
2017 fd = create_directory_or_subvolume(path, i->mode, /* subvol = */ true, i->allow_failure, &st, &creation);
2018 if (fd == -EEXIST)
2019 return 0;
2020 if (fd < 0)
2021 return fd;
2022
2023 if (creation == CREATION_NORMAL &&
2024 IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
2025 r = btrfs_subvol_auto_qgroup_fd(fd, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
2026 if (r == -ENOTTY)
2027 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
2028 else if (r == -EROFS)
2029 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
2030 else if (r == -ENOTCONN)
2031 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
2032 else if (r < 0)
2033 q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
2034 else if (r > 0)
2035 log_debug("Adjusted quota for subvolume \"%s\".", i->path);
2036 else if (r == 0)
2037 log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
2038 }
2039
2040 r = fd_set_perms(c, i, fd, path, &st, creation);
2041 if (q < 0) /* prefer the quota change error from above */
2042 return q;
2043
2044 return r;
2045 }
2046
2047 static int empty_directory(
2048 Context *c,
2049 Item *i,
2050 const char *path,
2051 CreationMode creation) {
2052
2053 _cleanup_close_ int fd = -EBADF;
2054 struct stat st;
2055 int r;
2056
2057 assert(c);
2058 assert(i);
2059 assert(i->type == EMPTY_DIRECTORY);
2060
2061 r = chase(path, arg_root, CHASE_SAFE|CHASE_WARN, NULL, &fd);
2062 if (r == -ENOLINK) /* Unsafe symlink: already covered by CHASE_WARN */
2063 return r;
2064 if (r == -ENOENT) {
2065 /* Option "e" operates only on existing objects. Do not print errors about non-existent files
2066 * or directories */
2067 log_debug_errno(r, "Skipping missing directory: %s", path);
2068 return 0;
2069 }
2070 if (r < 0)
2071 return log_error_errno(r, "Failed to open directory '%s': %m", path);
2072
2073 if (fstat(fd, &st) < 0)
2074 return log_error_errno(errno, "Failed to fstat(%s): %m", path);
2075 if (!S_ISDIR(st.st_mode)) {
2076 log_warning("'%s' already exists and is not a directory.", path);
2077 return 0;
2078 }
2079
2080 return fd_set_perms(c, i, fd, path, &st, creation);
2081 }
2082
2083 static int create_device(
2084 Context *c,
2085 Item *i,
2086 mode_t file_type) {
2087
2088 _cleanup_close_ int dfd = -EBADF, fd = -EBADF;
2089 _cleanup_free_ char *bn = NULL;
2090 CreationMode creation;
2091 struct stat st;
2092 int r;
2093
2094 assert(c);
2095 assert(i);
2096 assert(IN_SET(i->type, CREATE_BLOCK_DEVICE, CREATE_CHAR_DEVICE));
2097 assert(IN_SET(file_type, S_IFBLK, S_IFCHR));
2098
2099 r = path_extract_filename(i->path, &bn);
2100 if (r < 0)
2101 return log_error_errno(r, "Failed to extract filename from path '%s': %m", i->path);
2102 if (r == O_DIRECTORY)
2103 return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Cannot open path '%s' for creating device node, is a directory.", i->path);
2104
2105 /* Validate the path and use the returned directory fd for copying the target so we're sure that the
2106 * path can't be changed behind our back. */
2107 dfd = path_open_parent_safe(i->path, i->allow_failure);
2108 if (dfd < 0)
2109 return dfd;
2110
2111 WITH_UMASK(0000) {
2112 mac_selinux_create_file_prepare(i->path, file_type);
2113 r = RET_NERRNO(mknodat(dfd, bn, i->mode | file_type, i->major_minor));
2114 mac_selinux_create_file_clear();
2115 }
2116 creation = r >= 0 ? CREATION_NORMAL : CREATION_EXISTING;
2117
2118 /* Try to open the inode via O_PATH, regardless if we could create it or not. Maybe everything is in
2119 * order anyway and we hence can ignore the error to create the device node */
2120 fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
2121 if (fd < 0) {
2122 /* OK, so opening the inode failed, let's look at the original error then. */
2123
2124 if (r < 0) {
2125 if (ERRNO_IS_PRIVILEGE(r))
2126 goto handle_privilege;
2127
2128 return log_error_errno(r, "Failed to create device node '%s': %m", i->path);
2129 }
2130
2131 return log_error_errno(errno, "Failed to open device node '%s' we just created: %m", i->path);
2132 }
2133
2134 if (fstat(fd, &st) < 0)
2135 return log_error_errno(errno, "Failed to fstat(%s): %m", i->path);
2136
2137 if (((st.st_mode ^ file_type) & S_IFMT) != 0) {
2138
2139 if (i->append_or_force) {
2140 fd = safe_close(fd);
2141
2142 WITH_UMASK(0000) {
2143 mac_selinux_create_file_prepare(i->path, file_type);
2144 r = mknodat_atomic(dfd, bn, i->mode | file_type, i->major_minor);
2145 mac_selinux_create_file_clear();
2146 }
2147 if (ERRNO_IS_PRIVILEGE(r))
2148 goto handle_privilege;
2149 if (IN_SET(r, -EISDIR, -EEXIST, -ENOTEMPTY)) {
2150 r = rm_rf_child(dfd, bn, REMOVE_PHYSICAL);
2151 if (r < 0)
2152 return log_error_errno(r, "rm -rf %s failed: %m", i->path);
2153
2154 mac_selinux_create_file_prepare(i->path, file_type);
2155 r = RET_NERRNO(mknodat(dfd, bn, i->mode | file_type, i->major_minor));
2156 mac_selinux_create_file_clear();
2157 }
2158 if (r < 0)
2159 return log_error_errno(r, "Failed to create device node '%s': %m", i->path);
2160
2161 fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
2162 if (fd < 0)
2163 return log_error_errno(errno, "Failed to open device node we just created '%s': %m", i->path);
2164
2165 /* Validate type before change ownership below */
2166 if (fstat(fd, &st) < 0)
2167 return log_error_errno(errno, "Failed to fstat(%s): %m", i->path);
2168
2169 if (((st.st_mode ^ file_type) & S_IFMT) != 0)
2170 return log_error_errno(SYNTHETIC_ERRNO(EBADF), "Device node we just created is not a device node, refusing.");
2171
2172 creation = CREATION_FORCE;
2173 } else {
2174 log_warning("\"%s\" already exists and is not a device node.", i->path);
2175 return 0;
2176 }
2177 }
2178
2179 log_debug("%s %s device node \"%s\" %u:%u.",
2180 creation_mode_verb_to_string(creation),
2181 i->type == CREATE_BLOCK_DEVICE ? "block" : "char",
2182 i->path, major(i->mode), minor(i->mode));
2183
2184 return fd_set_perms(c, i, fd, i->path, &st, creation);
2185
2186 handle_privilege:
2187 log_debug_errno(r,
2188 "We lack permissions, possibly because of cgroup configuration; "
2189 "skipping creation of device node '%s'.", i->path);
2190 return 0;
2191 }
2192
2193 static int create_fifo(Context *c, Item *i) {
2194 _cleanup_close_ int pfd = -EBADF, fd = -EBADF;
2195 _cleanup_free_ char *bn = NULL;
2196 CreationMode creation;
2197 struct stat st;
2198 int r;
2199
2200 assert(c);
2201 assert(i);
2202 assert(i->type == CREATE_FIFO);
2203
2204 r = path_extract_filename(i->path, &bn);
2205 if (r < 0)
2206 return log_error_errno(r, "Failed to extract filename from path '%s': %m", i->path);
2207 if (r == O_DIRECTORY)
2208 return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Cannot open path '%s' for creating FIFO, is a directory.", i->path);
2209
2210 pfd = path_open_parent_safe(i->path, i->allow_failure);
2211 if (pfd < 0)
2212 return pfd;
2213
2214 WITH_UMASK(0000) {
2215 mac_selinux_create_file_prepare(i->path, S_IFIFO);
2216 r = RET_NERRNO(mkfifoat(pfd, bn, i->mode));
2217 mac_selinux_create_file_clear();
2218 }
2219
2220 creation = r >= 0 ? CREATION_NORMAL : CREATION_EXISTING;
2221
2222 /* Open the inode via O_PATH, regardless if we managed to create it or not. Maybe it is already the FIFO we want */
2223 fd = openat(pfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
2224 if (fd < 0) {
2225 if (r < 0)
2226 return log_error_errno(r, "Failed to create FIFO %s: %m", i->path); /* original error! */
2227
2228 return log_error_errno(errno, "Failed to open FIFO we just created %s: %m", i->path);
2229 }
2230
2231 if (fstat(fd, &st) < 0)
2232 return log_error_errno(errno, "Failed to fstat(%s): %m", i->path);
2233
2234 if (!S_ISFIFO(st.st_mode)) {
2235
2236 if (i->append_or_force) {
2237 fd = safe_close(fd);
2238
2239 WITH_UMASK(0000) {
2240 mac_selinux_create_file_prepare(i->path, S_IFIFO);
2241 r = mkfifoat_atomic(pfd, bn, i->mode);
2242 mac_selinux_create_file_clear();
2243 }
2244 if (IN_SET(r, -EISDIR, -EEXIST, -ENOTEMPTY)) {
2245 r = rm_rf_child(pfd, bn, REMOVE_PHYSICAL);
2246 if (r < 0)
2247 return log_error_errno(r, "rm -rf %s failed: %m", i->path);
2248
2249 mac_selinux_create_file_prepare(i->path, S_IFIFO);
2250 r = RET_NERRNO(mkfifoat(pfd, bn, i->mode));
2251 mac_selinux_create_file_clear();
2252 }
2253 if (r < 0)
2254 return log_error_errno(r, "Failed to create FIFO %s: %m", i->path);
2255
2256 fd = openat(pfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
2257 if (fd < 0)
2258 return log_error_errno(errno, "Failed to open FIFO we just created '%s': %m", i->path);
2259
2260 /* Validate type before change ownership below */
2261 if (fstat(fd, &st) < 0)
2262 return log_error_errno(errno, "Failed to fstat(%s): %m", i->path);
2263
2264 if (!S_ISFIFO(st.st_mode))
2265 return log_error_errno(SYNTHETIC_ERRNO(EBADF), "FIFO inode we just created is not a FIFO, refusing.");
2266
2267 creation = CREATION_FORCE;
2268 } else {
2269 log_warning("\"%s\" already exists and is not a FIFO.", i->path);
2270 return 0;
2271 }
2272 }
2273
2274 log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), i->path);
2275
2276 return fd_set_perms(c, i, fd, i->path, &st, creation);
2277 }
2278
2279 static int create_symlink(Context *c, Item *i) {
2280 _cleanup_close_ int pfd = -EBADF, fd = -EBADF;
2281 _cleanup_free_ char *bn = NULL;
2282 CreationMode creation;
2283 struct stat st;
2284 bool good = false;
2285 int r;
2286
2287 assert(c);
2288 assert(i);
2289
2290 r = path_extract_filename(i->path, &bn);
2291 if (r < 0)
2292 return log_error_errno(r, "Failed to extract filename from path '%s': %m", i->path);
2293 if (r == O_DIRECTORY)
2294 return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Cannot open path '%s' for creating FIFO, is a directory.", i->path);
2295
2296 pfd = path_open_parent_safe(i->path, i->allow_failure);
2297 if (pfd < 0)
2298 return pfd;
2299
2300 mac_selinux_create_file_prepare(i->path, S_IFLNK);
2301 r = RET_NERRNO(symlinkat(i->argument, pfd, bn));
2302 mac_selinux_create_file_clear();
2303
2304 creation = r >= 0 ? CREATION_NORMAL : CREATION_EXISTING;
2305
2306 fd = openat(pfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
2307 if (fd < 0) {
2308 if (r < 0)
2309 return log_error_errno(r, "Failed to create symlink '%s': %m", i->path); /* original error! */
2310
2311 return log_error_errno(errno, "Failed to open symlink we just created '%s': %m", i->path);
2312 }
2313
2314 if (fstat(fd, &st) < 0)
2315 return log_error_errno(errno, "Failed to fstat(%s): %m", i->path);
2316
2317 if (S_ISLNK(st.st_mode)) {
2318 _cleanup_free_ char *x = NULL;
2319
2320 r = readlinkat_malloc(fd, "", &x);
2321 if (r < 0)
2322 return log_error_errno(r, "readlinkat(%s) failed: %m", i->path);
2323
2324 good = streq(x, i->argument);
2325 } else
2326 good = false;
2327
2328 if (!good) {
2329 if (!i->append_or_force) {
2330 log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);
2331 return 0;
2332 }
2333
2334 fd = safe_close(fd);
2335
2336 mac_selinux_create_file_prepare(i->path, S_IFLNK);
2337 r = symlinkat_atomic_full(i->argument, pfd, bn, /* make_relative= */ false);
2338 mac_selinux_create_file_clear();
2339 if (IN_SET(r, -EISDIR, -EEXIST, -ENOTEMPTY)) {
2340 r = rm_rf_child(pfd, bn, REMOVE_PHYSICAL);
2341 if (r < 0)
2342 return log_error_errno(r, "rm -rf %s failed: %m", i->path);
2343
2344 mac_selinux_create_file_prepare(i->path, S_IFLNK);
2345 r = RET_NERRNO(symlinkat(i->argument, pfd, i->path));
2346 mac_selinux_create_file_clear();
2347 }
2348 if (r < 0)
2349 return log_error_errno(r, "symlink(%s, %s) failed: %m", i->argument, i->path);
2350
2351 fd = openat(pfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
2352 if (fd < 0)
2353 return log_error_errno(errno, "Failed to open symlink we just created '%s': %m", i->path);
2354
2355 /* Validate type before change ownership below */
2356 if (fstat(fd, &st) < 0)
2357 return log_error_errno(errno, "Failed to fstat(%s): %m", i->path);
2358
2359 if (!S_ISLNK(st.st_mode))
2360 return log_error_errno(SYNTHETIC_ERRNO(EBADF), "Symlink we just created is not a symlink, refusing.");
2361
2362 creation = CREATION_FORCE;
2363 }
2364
2365 log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);
2366 return fd_set_perms(c, i, fd, i->path, &st, creation);
2367 }
2368
2369 typedef int (*action_t)(Context *c, Item *i, const char *path, CreationMode creation);
2370 typedef int (*fdaction_t)(Context *c, Item *i, int fd, const char *path, const struct stat *st, CreationMode creation);
2371
2372 static int item_do(
2373 Context *c,
2374 Item *i,
2375 int fd,
2376 const char *path,
2377 CreationMode creation,
2378 fdaction_t action) {
2379
2380 struct stat st;
2381 int r = 0, q;
2382
2383 assert(c);
2384 assert(i);
2385 assert(path);
2386 assert(fd >= 0);
2387
2388 if (fstat(fd, &st) < 0) {
2389 r = log_error_errno(errno, "fstat() on file failed: %m");
2390 goto finish;
2391 }
2392
2393 /* This returns the first error we run into, but nevertheless tries to go on */
2394 r = action(c, i, fd, path, &st, creation);
2395
2396 if (S_ISDIR(st.st_mode)) {
2397 _cleanup_closedir_ DIR *d = NULL;
2398
2399 /* The passed 'fd' was opened with O_PATH. We need to convert it into a 'regular' fd before
2400 * reading the directory content. */
2401 d = opendir(FORMAT_PROC_FD_PATH(fd));
2402 if (!d) {
2403 log_error_errno(errno, "Failed to opendir() '%s': %m", FORMAT_PROC_FD_PATH(fd));
2404 if (r == 0)
2405 r = -errno;
2406 goto finish;
2407 }
2408
2409 FOREACH_DIRENT_ALL(de, d, q = -errno; goto finish) {
2410 int de_fd;
2411
2412 if (dot_or_dot_dot(de->d_name))
2413 continue;
2414
2415 de_fd = openat(fd, de->d_name, O_NOFOLLOW|O_CLOEXEC|O_PATH);
2416 if (de_fd < 0)
2417 q = log_error_errno(errno, "Failed to open() file '%s': %m", de->d_name);
2418 else {
2419 _cleanup_free_ char *de_path = NULL;
2420
2421 de_path = path_join(path, de->d_name);
2422 if (!de_path)
2423 q = log_oom();
2424 else
2425 /* Pass ownership of dirent fd over */
2426 q = item_do(c, i, de_fd, de_path, CREATION_EXISTING, action);
2427 }
2428
2429 if (q < 0 && r == 0)
2430 r = q;
2431 }
2432 }
2433 finish:
2434 safe_close(fd);
2435 return r;
2436 }
2437
2438 static int glob_item(Context *c, Item *i, action_t action) {
2439 _cleanup_globfree_ glob_t g = {
2440 .gl_opendir = (void *(*)(const char *)) opendir_nomod,
2441 };
2442 int r = 0, k;
2443
2444 assert(c);
2445 assert(i);
2446
2447 k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
2448 if (k < 0 && k != -ENOENT)
2449 return log_error_errno(k, "glob(%s) failed: %m", i->path);
2450
2451 STRV_FOREACH(fn, g.gl_pathv) {
2452 /* We pass CREATION_EXISTING here, since if we are globbing for it, it always has to exist */
2453 k = action(c, i, *fn, CREATION_EXISTING);
2454 if (k < 0 && r == 0)
2455 r = k;
2456 }
2457
2458 return r;
2459 }
2460
2461 static int glob_item_recursively(
2462 Context *c,
2463 Item *i,
2464 fdaction_t action) {
2465
2466 _cleanup_globfree_ glob_t g = {
2467 .gl_opendir = (void *(*)(const char *)) opendir_nomod,
2468 };
2469 int r = 0, k;
2470
2471 k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
2472 if (k < 0 && k != -ENOENT)
2473 return log_error_errno(k, "glob(%s) failed: %m", i->path);
2474
2475 STRV_FOREACH(fn, g.gl_pathv) {
2476 _cleanup_close_ int fd = -EBADF;
2477
2478 /* Make sure we won't trigger/follow file object (such as
2479 * device nodes, automounts, ...) pointed out by 'fn' with
2480 * O_PATH. Note, when O_PATH is used, flags other than
2481 * O_CLOEXEC, O_DIRECTORY, and O_NOFOLLOW are ignored. */
2482
2483 fd = open(*fn, O_CLOEXEC|O_NOFOLLOW|O_PATH);
2484 if (fd < 0) {
2485 log_error_errno(errno, "Opening '%s' failed: %m", *fn);
2486 if (r == 0)
2487 r = -errno;
2488 continue;
2489 }
2490
2491 k = item_do(c, i, fd, *fn, CREATION_EXISTING, action);
2492 if (k < 0 && r == 0)
2493 r = k;
2494
2495 /* we passed fd ownership to the previous call */
2496 fd = -EBADF;
2497 }
2498
2499 return r;
2500 }
2501
2502 static int rm_if_wrong_type_safe(
2503 mode_t mode,
2504 int parent_fd,
2505 const struct stat *parent_st, /* Only used if follow_links below is true. */
2506 const char *name,
2507 int flags) {
2508 _cleanup_free_ char *parent_name = NULL;
2509 bool follow_links = !FLAGS_SET(flags, AT_SYMLINK_NOFOLLOW);
2510 struct stat st;
2511 int r;
2512
2513 assert(name);
2514 assert((mode & ~S_IFMT) == 0);
2515 assert(!follow_links || parent_st);
2516 assert((flags & ~AT_SYMLINK_NOFOLLOW) == 0);
2517
2518 if (!filename_is_valid(name))
2519 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "\"%s\" is not a valid filename.", name);
2520
2521 r = fstatat_harder(parent_fd, name, &st, flags, REMOVE_CHMOD | REMOVE_CHMOD_RESTORE);
2522 if (r < 0) {
2523 (void) fd_get_path(parent_fd, &parent_name);
2524 return log_full_errno(r == -ENOENT? LOG_DEBUG : LOG_ERR, r,
2525 "Failed to stat \"%s\" at \"%s\": %m", name, strna(parent_name));
2526 }
2527
2528 /* Fail before removing anything if this is an unsafe transition. */
2529 if (follow_links && unsafe_transition(parent_st, &st)) {
2530 (void) fd_get_path(parent_fd, &parent_name);
2531 return log_error_errno(SYNTHETIC_ERRNO(ENOLINK),
2532 "Unsafe transition from \"%s\" to \"%s\".", parent_name, name);
2533 }
2534
2535 if ((st.st_mode & S_IFMT) == mode)
2536 return 0;
2537
2538 (void) fd_get_path(parent_fd, &parent_name);
2539 log_notice("Wrong file type 0o%o; rm -rf \"%s/%s\"", st.st_mode & S_IFMT, strna(parent_name), name);
2540
2541 /* If the target of the symlink was the wrong type, the link needs to be removed instead of the
2542 * target, so make sure it is identified as a link and not a directory. */
2543 if (follow_links) {
2544 r = fstatat_harder(parent_fd, name, &st, AT_SYMLINK_NOFOLLOW, REMOVE_CHMOD | REMOVE_CHMOD_RESTORE);
2545 if (r < 0)
2546 return log_error_errno(r, "Failed to stat \"%s\" at \"%s\": %m", name, strna(parent_name));
2547 }
2548
2549 /* Do not remove mount points. */
2550 r = fd_is_mount_point(parent_fd, name, follow_links ? AT_SYMLINK_FOLLOW : 0);
2551 if (r < 0)
2552 (void) log_warning_errno(r, "Failed to check if \"%s/%s\" is a mount point: %m; Continuing",
2553 strna(parent_name), name);
2554 else if (r > 0)
2555 return log_error_errno(SYNTHETIC_ERRNO(EBUSY),
2556 "Not removing \"%s/%s\" because it is a mount point.", strna(parent_name), name);
2557
2558 if ((st.st_mode & S_IFMT) == S_IFDIR) {
2559 _cleanup_close_ int child_fd = -EBADF;
2560
2561 child_fd = openat(parent_fd, name, O_NOCTTY | O_CLOEXEC | O_DIRECTORY);
2562 if (child_fd < 0)
2563 return log_error_errno(errno, "Failed to open \"%s\" at \"%s\": %m", name, strna(parent_name));
2564
2565 r = rm_rf_children(TAKE_FD(child_fd), REMOVE_ROOT|REMOVE_SUBVOLUME|REMOVE_PHYSICAL, &st);
2566 if (r < 0)
2567 return log_error_errno(r, "Failed to remove contents of \"%s\" at \"%s\": %m", name, strna(parent_name));
2568
2569 r = unlinkat_harder(parent_fd, name, AT_REMOVEDIR, REMOVE_CHMOD | REMOVE_CHMOD_RESTORE);
2570 } else
2571 r = unlinkat_harder(parent_fd, name, 0, REMOVE_CHMOD | REMOVE_CHMOD_RESTORE);
2572 if (r < 0)
2573 return log_error_errno(r, "Failed to remove \"%s\" at \"%s\": %m", name, strna(parent_name));
2574
2575 /* This is covered by the log_notice "Wrong file type..." It is logged earlier because it gives
2576 * context to other error messages that might follow. */
2577 return -ENOENT;
2578 }
2579
2580 /* If child_mode is non-zero, rm_if_wrong_type_safe will be executed for the last path component. */
2581 static int mkdir_parents_rm_if_wrong_type(mode_t child_mode, const char *path) {
2582 _cleanup_close_ int parent_fd = -EBADF;
2583 struct stat parent_st;
2584 size_t path_len;
2585 int r;
2586
2587 assert(path);
2588 assert((child_mode & ~S_IFMT) == 0);
2589
2590 path_len = strlen(path);
2591
2592 if (!is_path(path))
2593 /* rm_if_wrong_type_safe already logs errors. */
2594 return child_mode != 0 ? rm_if_wrong_type_safe(child_mode, AT_FDCWD, NULL, path, AT_SYMLINK_NOFOLLOW) : 0;
2595
2596 if (child_mode != 0 && endswith(path, "/"))
2597 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2598 "Trailing path separators are only allowed if child_mode is not set; got \"%s\"", path);
2599
2600 /* Get the parent_fd and stat. */
2601 parent_fd = openat(AT_FDCWD, path_is_absolute(path) ? "/" : ".", O_NOCTTY | O_CLOEXEC | O_DIRECTORY);
2602 if (parent_fd < 0)
2603 return log_error_errno(errno, "Failed to open root: %m");
2604
2605 if (fstat(parent_fd, &parent_st) < 0)
2606 return log_error_errno(errno, "Failed to stat root: %m");
2607
2608 /* Check every parent directory in the path, except the last component */
2609 for (const char *e = path;;) {
2610 _cleanup_close_ int next_fd = -EBADF;
2611 char t[path_len + 1];
2612 const char *s;
2613
2614 /* Find the start of the next path component. */
2615 s = e + strspn(e, "/");
2616 /* Find the end of the next path component. */
2617 e = s + strcspn(s, "/");
2618
2619 /* Copy the path component to t so it can be a null terminated string. */
2620 *((char*) mempcpy(t, s, e - s)) = 0;
2621
2622 /* Is this the last component? If so, then check the type */
2623 if (*e == 0)
2624 return child_mode != 0 ? rm_if_wrong_type_safe(child_mode, parent_fd, &parent_st, t, AT_SYMLINK_NOFOLLOW) : 0;
2625
2626 r = rm_if_wrong_type_safe(S_IFDIR, parent_fd, &parent_st, t, 0);
2627 /* Remove dangling symlinks. */
2628 if (r == -ENOENT)
2629 r = rm_if_wrong_type_safe(S_IFDIR, parent_fd, &parent_st, t, AT_SYMLINK_NOFOLLOW);
2630 if (r == -ENOENT) {
2631 WITH_UMASK(0000)
2632 r = mkdirat_label(parent_fd, t, 0755);
2633 if (r < 0) {
2634 _cleanup_free_ char *parent_name = NULL;
2635
2636 (void) fd_get_path(parent_fd, &parent_name);
2637 return log_error_errno(r, "Failed to mkdir \"%s\" at \"%s\": %m", t, strnull(parent_name));
2638 }
2639 } else if (r < 0)
2640 /* rm_if_wrong_type_safe already logs errors. */
2641 return r;
2642
2643 next_fd = RET_NERRNO(openat(parent_fd, t, O_NOCTTY | O_CLOEXEC | O_DIRECTORY));
2644 if (next_fd < 0) {
2645 _cleanup_free_ char *parent_name = NULL;
2646
2647 (void) fd_get_path(parent_fd, &parent_name);
2648 return log_error_errno(next_fd, "Failed to open \"%s\" at \"%s\": %m", t, strnull(parent_name));
2649 }
2650 r = RET_NERRNO(fstat(next_fd, &parent_st));
2651 if (r < 0) {
2652 _cleanup_free_ char *parent_name = NULL;
2653
2654 (void) fd_get_path(parent_fd, &parent_name);
2655 return log_error_errno(r, "Failed to stat \"%s\" at \"%s\": %m", t, strnull(parent_name));
2656 }
2657
2658 close_and_replace(parent_fd, next_fd);
2659 }
2660 }
2661
2662 static int mkdir_parents_item(Item *i, mode_t child_mode) {
2663 int r;
2664 if (i->try_replace) {
2665 r = mkdir_parents_rm_if_wrong_type(child_mode, i->path);
2666 if (r < 0 && r != -ENOENT)
2667 return r;
2668 } else
2669 WITH_UMASK(0000)
2670 (void) mkdir_parents_label(i->path, 0755);
2671
2672 return 0;
2673 }
2674
2675 static int create_item(Context *c, Item *i) {
2676 int r;
2677
2678 assert(c);
2679 assert(i);
2680
2681 log_debug("Running create action for entry %c %s", (char) i->type, i->path);
2682
2683 switch (i->type) {
2684
2685 case IGNORE_PATH:
2686 case IGNORE_DIRECTORY_PATH:
2687 case REMOVE_PATH:
2688 case RECURSIVE_REMOVE_PATH:
2689 return 0;
2690
2691 case TRUNCATE_FILE:
2692 case CREATE_FILE:
2693 r = mkdir_parents_item(i, S_IFREG);
2694 if (r < 0)
2695 return r;
2696
2697 if ((i->type == CREATE_FILE && i->append_or_force) || i->type == TRUNCATE_FILE)
2698 r = truncate_file(c, i, i->path);
2699 else
2700 r = create_file(c, i, i->path);
2701 if (r < 0)
2702 return r;
2703 break;
2704
2705 case COPY_FILES:
2706 r = mkdir_parents_item(i, 0);
2707 if (r < 0)
2708 return r;
2709
2710 r = copy_files(c, i);
2711 if (r < 0)
2712 return r;
2713 break;
2714
2715 case WRITE_FILE:
2716 r = glob_item(c, i, write_one_file);
2717 if (r < 0)
2718 return r;
2719
2720 break;
2721
2722 case CREATE_DIRECTORY:
2723 case TRUNCATE_DIRECTORY:
2724 r = mkdir_parents_item(i, S_IFDIR);
2725 if (r < 0)
2726 return r;
2727
2728 r = create_directory(c, i, i->path);
2729 if (r < 0)
2730 return r;
2731 break;
2732
2733 case CREATE_SUBVOLUME:
2734 case CREATE_SUBVOLUME_INHERIT_QUOTA:
2735 case CREATE_SUBVOLUME_NEW_QUOTA:
2736 r = mkdir_parents_item(i, S_IFDIR);
2737 if (r < 0)
2738 return r;
2739
2740 r = create_subvolume(c, i, i->path);
2741 if (r < 0)
2742 return r;
2743 break;
2744
2745 case EMPTY_DIRECTORY:
2746 r = glob_item(c, i, empty_directory);
2747 if (r < 0)
2748 return r;
2749 break;
2750
2751 case CREATE_FIFO:
2752 r = mkdir_parents_item(i, S_IFIFO);
2753 if (r < 0)
2754 return r;
2755
2756 r = create_fifo(c, i);
2757 if (r < 0)
2758 return r;
2759 break;
2760
2761 case CREATE_SYMLINK:
2762 r = mkdir_parents_item(i, S_IFLNK);
2763 if (r < 0)
2764 return r;
2765
2766 r = create_symlink(c, i);
2767 if (r < 0)
2768 return r;
2769
2770 break;
2771
2772 case CREATE_BLOCK_DEVICE:
2773 case CREATE_CHAR_DEVICE:
2774 if (have_effective_cap(CAP_MKNOD) <= 0) {
2775 /* In a container we lack CAP_MKNOD. We shouldn't attempt to create the device node in that
2776 * case to avoid noise, and we don't support virtualized devices in containers anyway. */
2777
2778 log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);
2779 return 0;
2780 }
2781
2782 r = mkdir_parents_item(i, i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR);
2783 if (r < 0)
2784 return r;
2785
2786 r = create_device(c, i, i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR);
2787 if (r < 0)
2788 return r;
2789
2790 break;
2791
2792 case ADJUST_MODE:
2793 case RELABEL_PATH:
2794 r = glob_item(c, i, path_set_perms);
2795 if (r < 0)
2796 return r;
2797 break;
2798
2799 case RECURSIVE_RELABEL_PATH:
2800 r = glob_item_recursively(c, i, fd_set_perms);
2801 if (r < 0)
2802 return r;
2803 break;
2804
2805 case SET_XATTR:
2806 r = glob_item(c, i, path_set_xattrs);
2807 if (r < 0)
2808 return r;
2809 break;
2810
2811 case RECURSIVE_SET_XATTR:
2812 r = glob_item_recursively(c, i, fd_set_xattrs);
2813 if (r < 0)
2814 return r;
2815 break;
2816
2817 case SET_ACL:
2818 r = glob_item(c, i, path_set_acls);
2819 if (r < 0)
2820 return r;
2821 break;
2822
2823 case RECURSIVE_SET_ACL:
2824 r = glob_item_recursively(c, i, fd_set_acls);
2825 if (r < 0)
2826 return r;
2827 break;
2828
2829 case SET_ATTRIBUTE:
2830 r = glob_item(c, i, path_set_attribute);
2831 if (r < 0)
2832 return r;
2833 break;
2834
2835 case RECURSIVE_SET_ATTRIBUTE:
2836 r = glob_item_recursively(c, i, fd_set_attribute);
2837 if (r < 0)
2838 return r;
2839 break;
2840 }
2841
2842 return 0;
2843 }
2844
2845 static int purge_item_instance(Context *c, Item *i, const char *instance, CreationMode creation) {
2846 int r;
2847
2848 /* FIXME: we probably should use dir_cleanup() here instead of rm_rf() so that 'x' is honoured. */
2849 log_debug("rm -rf \"%s\"", instance);
2850 r = rm_rf(instance, REMOVE_ROOT|REMOVE_SUBVOLUME|REMOVE_PHYSICAL);
2851 if (r < 0 && r != -ENOENT)
2852 return log_error_errno(r, "rm_rf(%s): %m", instance);
2853
2854 return 0;
2855 }
2856
2857 static int purge_item(Context *c, Item *i) {
2858
2859 assert(i);
2860
2861 if (!needs_purge(i->type))
2862 return 0;
2863
2864 log_debug("Running purge owned action for entry %c %s", (char) i->type, i->path);
2865
2866 if (needs_glob(i->type))
2867 return glob_item(c, i, purge_item_instance);
2868
2869 return purge_item_instance(c, i, i->path, CREATION_EXISTING);
2870 }
2871
2872 static int remove_item_instance(
2873 Context *c,
2874 Item *i,
2875 const char *instance,
2876 CreationMode creation) {
2877
2878 int r;
2879
2880 assert(c);
2881 assert(i);
2882
2883 switch (i->type) {
2884
2885 case REMOVE_PATH:
2886 if (remove(instance) < 0 && errno != ENOENT)
2887 return log_error_errno(errno, "rm(%s): %m", instance);
2888
2889 break;
2890
2891 case RECURSIVE_REMOVE_PATH:
2892 /* FIXME: we probably should use dir_cleanup() here instead of rm_rf() so that 'x' is honoured. */
2893 log_debug("rm -rf \"%s\"", instance);
2894 r = rm_rf(instance, REMOVE_ROOT|REMOVE_SUBVOLUME|REMOVE_PHYSICAL);
2895 if (r < 0 && r != -ENOENT)
2896 return log_error_errno(r, "rm_rf(%s): %m", instance);
2897
2898 break;
2899
2900 default:
2901 assert_not_reached();
2902 }
2903
2904 return 0;
2905 }
2906
2907 static int remove_item(Context *c, Item *i) {
2908 int r;
2909
2910 assert(c);
2911 assert(i);
2912
2913 log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
2914
2915 switch (i->type) {
2916
2917 case TRUNCATE_DIRECTORY:
2918 /* FIXME: we probably should use dir_cleanup() here instead of rm_rf() so that 'x' is honoured. */
2919 log_debug("rm -rf \"%s\"", i->path);
2920 r = rm_rf(i->path, REMOVE_PHYSICAL);
2921 if (r < 0 && r != -ENOENT)
2922 return log_error_errno(r, "rm_rf(%s): %m", i->path);
2923
2924 return 0;
2925
2926 case REMOVE_PATH:
2927 case RECURSIVE_REMOVE_PATH:
2928 return glob_item(c, i, remove_item_instance);
2929
2930 default:
2931 return 0;
2932 }
2933 }
2934
2935 static char *age_by_to_string(AgeBy ab, bool is_dir) {
2936 static const char ab_map[] = { 'a', 'b', 'c', 'm' };
2937 size_t j = 0;
2938 char *ret;
2939
2940 ret = new(char, ELEMENTSOF(ab_map) + 1);
2941 if (!ret)
2942 return NULL;
2943
2944 for (size_t i = 0; i < ELEMENTSOF(ab_map); i++)
2945 if (FLAGS_SET(ab, 1U << i))
2946 ret[j++] = is_dir ? ascii_toupper(ab_map[i]) : ab_map[i];
2947
2948 ret[j] = 0;
2949 return ret;
2950 }
2951
2952 static int clean_item_instance(
2953 Context *c,
2954 Item *i,
2955 const char* instance,
2956 CreationMode creation) {
2957
2958 _cleanup_closedir_ DIR *d = NULL;
2959 STRUCT_STATX_DEFINE(sx);
2960 int mountpoint, r;
2961 usec_t cutoff, n;
2962
2963 assert(i);
2964
2965 if (!i->age_set)
2966 return 0;
2967
2968 n = now(CLOCK_REALTIME);
2969 if (n < i->age)
2970 return 0;
2971
2972 cutoff = n - i->age;
2973
2974 d = opendir_nomod(instance);
2975 if (!d) {
2976 if (IN_SET(errno, ENOENT, ENOTDIR)) {
2977 log_debug_errno(errno, "Directory \"%s\": %m", instance);
2978 return 0;
2979 }
2980
2981 return log_error_errno(errno, "Failed to open directory %s: %m", instance);
2982 }
2983
2984 r = statx_fallback(dirfd(d), "", AT_EMPTY_PATH, STATX_MODE|STATX_INO|STATX_ATIME|STATX_MTIME, &sx);
2985 if (r < 0)
2986 return log_error_errno(r, "statx(%s) failed: %m", instance);
2987
2988 if (FLAGS_SET(sx.stx_attributes_mask, STATX_ATTR_MOUNT_ROOT))
2989 mountpoint = FLAGS_SET(sx.stx_attributes, STATX_ATTR_MOUNT_ROOT);
2990 else {
2991 struct stat ps;
2992
2993 if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
2994 return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
2995
2996 mountpoint =
2997 sx.stx_dev_major != major(ps.st_dev) ||
2998 sx.stx_dev_minor != minor(ps.st_dev) ||
2999 sx.stx_ino != ps.st_ino;
3000 }
3001
3002 if (DEBUG_LOGGING) {
3003 _cleanup_free_ char *ab_f = NULL, *ab_d = NULL;
3004
3005 ab_f = age_by_to_string(i->age_by_file, false);
3006 if (!ab_f)
3007 return log_oom();
3008
3009 ab_d = age_by_to_string(i->age_by_dir, true);
3010 if (!ab_d)
3011 return log_oom();
3012
3013 log_debug("Cleanup threshold for %s \"%s\" is %s; age-by: %s%s",
3014 mountpoint ? "mount point" : "directory",
3015 instance,
3016 FORMAT_TIMESTAMP_STYLE(cutoff, TIMESTAMP_US),
3017 ab_f, ab_d);
3018 }
3019
3020 return dir_cleanup(c, i, instance, d,
3021 statx_timestamp_load_nsec(&sx.stx_atime),
3022 statx_timestamp_load_nsec(&sx.stx_mtime),
3023 cutoff * NSEC_PER_USEC,
3024 sx.stx_dev_major, sx.stx_dev_minor, mountpoint,
3025 MAX_DEPTH, i->keep_first_level,
3026 i->age_by_file, i->age_by_dir);
3027 }
3028
3029 static int clean_item(Context *c, Item *i) {
3030 assert(c);
3031 assert(i);
3032
3033 log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
3034
3035 switch (i->type) {
3036
3037 case CREATE_DIRECTORY:
3038 case TRUNCATE_DIRECTORY:
3039 case CREATE_SUBVOLUME:
3040 case CREATE_SUBVOLUME_INHERIT_QUOTA:
3041 case CREATE_SUBVOLUME_NEW_QUOTA:
3042 case COPY_FILES:
3043 clean_item_instance(c, i, i->path, CREATION_EXISTING);
3044 return 0;
3045
3046 case EMPTY_DIRECTORY:
3047 case IGNORE_PATH:
3048 case IGNORE_DIRECTORY_PATH:
3049 return glob_item(c, i, clean_item_instance);
3050
3051 default:
3052 return 0;
3053 }
3054 }
3055
3056 static int process_item(
3057 Context *c,
3058 Item *i,
3059 OperationMask operation) {
3060
3061 OperationMask todo;
3062 _cleanup_free_ char *_path = NULL;
3063 const char *path;
3064 int r;
3065
3066 assert(c);
3067 assert(i);
3068
3069 todo = operation & ~i->done;
3070 if (todo == 0) /* Everything already done? */
3071 return 0;
3072
3073 i->done |= operation;
3074
3075 path = i->path;
3076 if (string_is_glob(path)) {
3077 /* We can't easily check whether a glob matches any autofs path, so let's do the check only
3078 * for the non-glob part. */
3079
3080 r = glob_non_glob_prefix(path, &_path);
3081 if (r < 0 && r != -ENOENT)
3082 return log_debug_errno(r, "Failed to deglob path: %m");
3083 if (r >= 0)
3084 path = _path;
3085 }
3086
3087 r = chase(path, arg_root, CHASE_NO_AUTOFS|CHASE_NONEXISTENT|CHASE_WARN, NULL, NULL);
3088 if (r == -EREMOTE) {
3089 log_notice_errno(r, "Skipping %s", i->path); /* We log the configured path, to not confuse the user. */
3090 return 0;
3091 }
3092 if (r < 0)
3093 log_debug_errno(r, "Failed to determine whether '%s' is below autofs, ignoring: %m", i->path);
3094
3095 r = FLAGS_SET(operation, OPERATION_CREATE) ? create_item(c, i) : 0;
3096 /* Failure can only be tolerated for create */
3097 if (i->allow_failure)
3098 r = 0;
3099
3100 RET_GATHER(r, FLAGS_SET(operation, OPERATION_REMOVE) ? remove_item(c, i) : 0);
3101 RET_GATHER(r, FLAGS_SET(operation, OPERATION_CLEAN) ? clean_item(c, i) : 0);
3102 RET_GATHER(r, FLAGS_SET(operation, OPERATION_PURGE) ? purge_item(c, i) : 0);
3103
3104 return r;
3105 }
3106
3107 static int process_item_array(
3108 Context *c,
3109 ItemArray *array,
3110 OperationMask operation) {
3111
3112 int r = 0;
3113 size_t n;
3114
3115 assert(c);
3116 assert(array);
3117
3118 /* Create any parent first. */
3119 if (FLAGS_SET(operation, OPERATION_CREATE) && array->parent)
3120 r = process_item_array(c, array->parent, operation & OPERATION_CREATE);
3121
3122 /* Clean up all children first */
3123 if ((operation & (OPERATION_REMOVE|OPERATION_CLEAN|OPERATION_PURGE)) && !set_isempty(array->children)) {
3124 ItemArray *cc;
3125
3126 SET_FOREACH(cc, array->children) {
3127 int k;
3128
3129 k = process_item_array(c, cc, operation & (OPERATION_REMOVE|OPERATION_CLEAN|OPERATION_PURGE));
3130 if (k < 0 && r == 0)
3131 r = k;
3132 }
3133 }
3134
3135 for (n = 0; n < array->n_items; n++) {
3136 int k;
3137
3138 k = process_item(c, array->items + n, operation);
3139 if (k < 0 && r == 0)
3140 r = k;
3141 }
3142
3143 return r;
3144 }
3145
3146 static void item_free_contents(Item *i) {
3147 assert(i);
3148 free(i->path);
3149 free(i->argument);
3150 free(i->binary_argument);
3151 strv_free(i->xattrs);
3152
3153 #if HAVE_ACL
3154 if (i->acl_access)
3155 acl_free(i->acl_access);
3156
3157 if (i->acl_access_exec)
3158 acl_free(i->acl_access_exec);
3159
3160 if (i->acl_default)
3161 acl_free(i->acl_default);
3162 #endif
3163 }
3164
3165 static ItemArray* item_array_free(ItemArray *a) {
3166 size_t n;
3167
3168 if (!a)
3169 return NULL;
3170
3171 for (n = 0; n < a->n_items; n++)
3172 item_free_contents(a->items + n);
3173
3174 set_free(a->children);
3175 free(a->items);
3176 return mfree(a);
3177 }
3178
3179 static int item_compare(const Item *a, const Item *b) {
3180 /* Make sure that the ownership taking item is put first, so
3181 * that we first create the node, and then can adjust it */
3182
3183 if (takes_ownership(a->type) && !takes_ownership(b->type))
3184 return -1;
3185 if (!takes_ownership(a->type) && takes_ownership(b->type))
3186 return 1;
3187
3188 return CMP(a->type, b->type);
3189 }
3190
3191 static bool item_compatible(const Item *a, const Item *b) {
3192 assert(a);
3193 assert(b);
3194 assert(streq(a->path, b->path));
3195
3196 if (takes_ownership(a->type) && takes_ownership(b->type))
3197 /* check if the items are the same */
3198 return memcmp_nn(item_binary_argument(a), item_binary_argument_size(a),
3199 item_binary_argument(b), item_binary_argument_size(b)) == 0 &&
3200
3201 a->uid_set == b->uid_set &&
3202 a->uid == b->uid &&
3203 a->uid_only_create == b->uid_only_create &&
3204
3205 a->gid_set == b->gid_set &&
3206 a->gid == b->gid &&
3207 a->gid_only_create == b->gid_only_create &&
3208
3209 a->mode_set == b->mode_set &&
3210 a->mode == b->mode &&
3211 a->mode_only_create == b->mode_only_create &&
3212
3213 a->age_set == b->age_set &&
3214 a->age == b->age &&
3215
3216 a->age_by_file == b->age_by_file &&
3217 a->age_by_dir == b->age_by_dir &&
3218
3219 a->mask_perms == b->mask_perms &&
3220
3221 a->keep_first_level == b->keep_first_level &&
3222
3223 a->major_minor == b->major_minor;
3224
3225 return true;
3226 }
3227
3228 static bool should_include_path(const char *path) {
3229 STRV_FOREACH(prefix, arg_exclude_prefixes)
3230 if (path_startswith(path, *prefix)) {
3231 log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
3232 path, *prefix);
3233 return false;
3234 }
3235
3236 STRV_FOREACH(prefix, arg_include_prefixes)
3237 if (path_startswith(path, *prefix)) {
3238 log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
3239 return true;
3240 }
3241
3242 /* no matches, so we should include this path only if we have no allow list at all */
3243 if (strv_isempty(arg_include_prefixes))
3244 return true;
3245
3246 log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
3247 return false;
3248 }
3249
3250 static int specifier_expansion_from_arg(const Specifier *specifier_table, Item *i) {
3251 int r;
3252
3253 assert(i);
3254
3255 if (!i->argument)
3256 return 0;
3257
3258 switch (i->type) {
3259 case COPY_FILES:
3260 case CREATE_SYMLINK:
3261 case CREATE_FILE:
3262 case TRUNCATE_FILE:
3263 case WRITE_FILE: {
3264 _cleanup_free_ char *unescaped = NULL, *resolved = NULL;
3265 ssize_t l;
3266
3267 l = cunescape(i->argument, 0, &unescaped);
3268 if (l < 0)
3269 return log_error_errno(l, "Failed to unescape parameter to write: %s", i->argument);
3270
3271 r = specifier_printf(unescaped, PATH_MAX-1, specifier_table, arg_root, NULL, &resolved);
3272 if (r < 0)
3273 return r;
3274
3275 return free_and_replace(i->argument, resolved);
3276 }
3277 case SET_XATTR:
3278 case RECURSIVE_SET_XATTR:
3279 STRV_FOREACH(xattr, i->xattrs) {
3280 _cleanup_free_ char *resolved = NULL;
3281
3282 r = specifier_printf(*xattr, SIZE_MAX, specifier_table, arg_root, NULL, &resolved);
3283 if (r < 0)
3284 return r;
3285
3286 free_and_replace(*xattr, resolved);
3287 }
3288 return 0;
3289
3290 default:
3291 return 0;
3292 }
3293 }
3294
3295 static int patch_var_run(const char *fname, unsigned line, char **path) {
3296 const char *k;
3297 char *n;
3298
3299 assert(path);
3300 assert(*path);
3301
3302 /* Optionally rewrites lines referencing /var/run/, to use /run/ instead. Why bother? tmpfiles merges lines in
3303 * some cases and detects conflicts in others. If files/directories are specified through two equivalent lines
3304 * this is problematic as neither case will be detected. Ideally we'd detect these cases by resolving symlinks
3305 * early, but that's precisely not what we can do here as this code very likely is running very early on, at a
3306 * time where the paths in question are not available yet, or even more importantly, our own tmpfiles rules
3307 * might create the paths that are intermediary to the listed paths. We can't really cover the generic case,
3308 * but the least we can do is cover the specific case of /var/run vs. /run, as /var/run is a legacy name for
3309 * /run only, and we explicitly document that and require that on systemd systems the former is a symlink to
3310 * the latter. Moreover files below this path are by far the primary use case for tmpfiles.d/. */
3311
3312 k = path_startswith(*path, "/var/run/");
3313 if (isempty(k)) /* Don't complain about other paths than /var/run, and not about /var/run itself either. */
3314 return 0;
3315
3316 n = path_join("/run", k);
3317 if (!n)
3318 return log_oom();
3319
3320 /* Also log about this briefly. We do so at LOG_NOTICE level, as we fixed up the situation automatically, hence
3321 * there's no immediate need for action by the user. However, in the interest of making things less confusing
3322 * to the user, let's still inform the user that these snippets should really be updated. */
3323 log_syntax(NULL, LOG_NOTICE, fname, line, 0,
3324 "Line references path below legacy directory /var/run/, updating %s → %s; please update the tmpfiles.d/ drop-in file accordingly.",
3325 *path, n);
3326
3327 free_and_replace(*path, n);
3328
3329 return 0;
3330 }
3331
3332 static int find_uid(const char *user, uid_t *ret_uid, Hashmap **cache) {
3333 int r;
3334
3335 assert(user);
3336 assert(ret_uid);
3337
3338 /* First: parse as numeric UID string */
3339 r = parse_uid(user, ret_uid);
3340 if (r >= 0)
3341 return r;
3342
3343 /* Second: pass to NSS if we are running "online" */
3344 if (!arg_root)
3345 return get_user_creds(&user, ret_uid, NULL, NULL, NULL, 0);
3346
3347 /* Third, synthesize "root" unconditionally */
3348 if (streq(user, "root")) {
3349 *ret_uid = 0;
3350 return 0;
3351 }
3352
3353 /* Fourth: use fgetpwent() to read /etc/passwd directly, if we are "offline" */
3354 return name_to_uid_offline(arg_root, user, ret_uid, cache);
3355 }
3356
3357 static int find_gid(const char *group, gid_t *ret_gid, Hashmap **cache) {
3358 int r;
3359
3360 assert(group);
3361 assert(ret_gid);
3362
3363 /* First: parse as numeric GID string */
3364 r = parse_gid(group, ret_gid);
3365 if (r >= 0)
3366 return r;
3367
3368 /* Second: pass to NSS if we are running "online" */
3369 if (!arg_root)
3370 return get_group_creds(&group, ret_gid, 0);
3371
3372 /* Third, synthesize "root" unconditionally */
3373 if (streq(group, "root")) {
3374 *ret_gid = 0;
3375 return 0;
3376 }
3377
3378 /* Fourth: use fgetgrent() to read /etc/group directly, if we are "offline" */
3379 return name_to_gid_offline(arg_root, group, ret_gid, cache);
3380 }
3381
3382 static int parse_age_by_from_arg(const char *age_by_str, Item *item) {
3383 AgeBy ab_f = 0, ab_d = 0;
3384
3385 static const struct {
3386 char age_by_chr;
3387 AgeBy age_by_flag;
3388 } age_by_types[] = {
3389 { 'a', AGE_BY_ATIME },
3390 { 'b', AGE_BY_BTIME },
3391 { 'c', AGE_BY_CTIME },
3392 { 'm', AGE_BY_MTIME },
3393 };
3394
3395 assert(age_by_str);
3396 assert(item);
3397
3398 if (isempty(age_by_str))
3399 return -EINVAL;
3400
3401 for (const char *s = age_by_str; *s != 0; s++) {
3402 size_t i;
3403
3404 /* Ignore whitespace. */
3405 if (strchr(WHITESPACE, *s))
3406 continue;
3407
3408 for (i = 0; i < ELEMENTSOF(age_by_types); i++) {
3409 /* Check lower-case for files, upper-case for directories. */
3410 if (*s == age_by_types[i].age_by_chr) {
3411 ab_f |= age_by_types[i].age_by_flag;
3412 break;
3413 } else if (*s == ascii_toupper(age_by_types[i].age_by_chr)) {
3414 ab_d |= age_by_types[i].age_by_flag;
3415 break;
3416 }
3417 }
3418
3419 /* Invalid character. */
3420 if (i >= ELEMENTSOF(age_by_types))
3421 return -EINVAL;
3422 }
3423
3424 /* No match. */
3425 if (ab_f == 0 && ab_d == 0)
3426 return -EINVAL;
3427
3428 item->age_by_file = ab_f > 0 ? ab_f : AGE_BY_DEFAULT_FILE;
3429 item->age_by_dir = ab_d > 0 ? ab_d : AGE_BY_DEFAULT_DIR;
3430
3431 return 0;
3432 }
3433
3434 static bool is_duplicated_item(ItemArray *existing, const Item *i) {
3435
3436 assert(existing);
3437 assert(i);
3438
3439 for (size_t n = 0; n < existing->n_items; n++) {
3440 const Item *e = existing->items + n;
3441
3442 if (item_compatible(e, i))
3443 continue;
3444
3445 /* Only multiple 'w+' lines for the same path are allowed. */
3446 if (e->type != WRITE_FILE || !e->append_or_force ||
3447 i->type != WRITE_FILE || !i->append_or_force)
3448 return true;
3449 }
3450
3451 return false;
3452 }
3453
3454 static int parse_line(
3455 Context *c,
3456 const char *fname,
3457 unsigned line,
3458 const char *buffer,
3459 bool *invalid_config,
3460 Hashmap **uid_cache,
3461 Hashmap **gid_cache) {
3462
3463 _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
3464 _cleanup_(item_free_contents) Item i = {
3465 /* The "age-by" argument considers all file timestamp types by default. */
3466 .age_by_file = AGE_BY_DEFAULT_FILE,
3467 .age_by_dir = AGE_BY_DEFAULT_DIR,
3468 };
3469 ItemArray *existing;
3470 OrderedHashmap *h;
3471 int r, pos;
3472 bool append_or_force = false, boot = false, allow_failure = false, try_replace = false,
3473 unbase64 = false, from_cred = false, missing_user_or_group = false;
3474
3475 assert(c);
3476 assert(fname);
3477 assert(line >= 1);
3478 assert(buffer);
3479
3480 const Specifier specifier_table[] = {
3481 { 'a', specifier_architecture, NULL },
3482 { 'b', specifier_boot_id, NULL },
3483 { 'B', specifier_os_build_id, NULL },
3484 { 'H', specifier_hostname, NULL },
3485 { 'l', specifier_short_hostname, NULL },
3486 { 'm', specifier_machine_id, NULL },
3487 { 'o', specifier_os_id, NULL },
3488 { 'v', specifier_kernel_release, NULL },
3489 { 'w', specifier_os_version_id, NULL },
3490 { 'W', specifier_os_variant_id, NULL },
3491
3492 { 'h', specifier_user_home, NULL },
3493
3494 { 'C', specifier_directory, UINT_TO_PTR(DIRECTORY_CACHE) },
3495 { 'L', specifier_directory, UINT_TO_PTR(DIRECTORY_LOGS) },
3496 { 'S', specifier_directory, UINT_TO_PTR(DIRECTORY_STATE) },
3497 { 't', specifier_directory, UINT_TO_PTR(DIRECTORY_RUNTIME) },
3498
3499 COMMON_CREDS_SPECIFIERS(arg_runtime_scope),
3500 COMMON_TMP_SPECIFIERS,
3501 {}
3502 };
3503
3504 r = extract_many_words(
3505 &buffer,
3506 NULL,
3507 EXTRACT_UNQUOTE | EXTRACT_CUNESCAPE,
3508 &action,
3509 &path,
3510 &mode,
3511 &user,
3512 &group,
3513 &age,
3514 NULL);
3515 if (r < 0) {
3516 if (IN_SET(r, -EINVAL, -EBADSLT))
3517 /* invalid quoting and such or an unknown specifier */
3518 *invalid_config = true;
3519 return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to parse line: %m");
3520 } else if (r < 2) {
3521 *invalid_config = true;
3522 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "Syntax error.");
3523 }
3524
3525 if (!empty_or_dash(buffer)) {
3526 i.argument = strdup(buffer);
3527 if (!i.argument)
3528 return log_oom();
3529 }
3530
3531 if (isempty(action)) {
3532 *invalid_config = true;
3533 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "Command too short '%s'.", action);
3534 }
3535
3536 for (pos = 1; action[pos]; pos++) {
3537 if (action[pos] == '!' && !boot)
3538 boot = true;
3539 else if (action[pos] == '+' && !append_or_force)
3540 append_or_force = true;
3541 else if (action[pos] == '-' && !allow_failure)
3542 allow_failure = true;
3543 else if (action[pos] == '=' && !try_replace)
3544 try_replace = true;
3545 else if (action[pos] == '~' && !unbase64)
3546 unbase64 = true;
3547 else if (action[pos] == '^' && !from_cred)
3548 from_cred = true;
3549 else {
3550 *invalid_config = true;
3551 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "Unknown modifiers in command '%s'", action);
3552 }
3553 }
3554
3555 if (boot && !arg_boot) {
3556 log_syntax(NULL, LOG_DEBUG, fname, line, 0, "Ignoring entry %s \"%s\" because --boot is not specified.", action, path);
3557 return 0;
3558 }
3559
3560 i.type = action[0];
3561 i.append_or_force = append_or_force;
3562 i.allow_failure = allow_failure;
3563 i.try_replace = try_replace;
3564
3565 r = specifier_printf(path, PATH_MAX-1, specifier_table, arg_root, NULL, &i.path);
3566 if (ERRNO_IS_NOINFO(r))
3567 return log_unresolvable_specifier(fname, line);
3568 if (r < 0) {
3569 if (IN_SET(r, -EINVAL, -EBADSLT))
3570 *invalid_config = true;
3571 return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to replace specifiers in '%s': %m", path);
3572 }
3573
3574 r = patch_var_run(fname, line, &i.path);
3575 if (r < 0)
3576 return r;
3577
3578 if (!path_is_absolute(i.path)) {
3579 *invalid_config = true;
3580 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG),
3581 "Path '%s' not absolute.", i.path);
3582 }
3583
3584 path_simplify(i.path);
3585
3586 switch (i.type) {
3587
3588 case CREATE_DIRECTORY:
3589 case CREATE_SUBVOLUME:
3590 case CREATE_SUBVOLUME_INHERIT_QUOTA:
3591 case CREATE_SUBVOLUME_NEW_QUOTA:
3592 case EMPTY_DIRECTORY:
3593 case TRUNCATE_DIRECTORY:
3594 case CREATE_FIFO:
3595 case IGNORE_PATH:
3596 case IGNORE_DIRECTORY_PATH:
3597 case REMOVE_PATH:
3598 case RECURSIVE_REMOVE_PATH:
3599 case ADJUST_MODE:
3600 case RELABEL_PATH:
3601 case RECURSIVE_RELABEL_PATH:
3602 if (i.argument)
3603 log_syntax(NULL,
3604 LOG_WARNING,
3605 fname,
3606 line,
3607 0,
3608 "%c lines don't take argument fields, ignoring.",
3609 (char) i.type);
3610
3611 break;
3612
3613 case CREATE_FILE:
3614 case TRUNCATE_FILE:
3615 break;
3616
3617 case CREATE_SYMLINK:
3618 if (unbase64) {
3619 *invalid_config = true;
3620 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "base64 decoding not supported for symlink targets.");
3621 }
3622 break;
3623
3624 case WRITE_FILE:
3625 if (!i.argument) {
3626 *invalid_config = true;
3627 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "Write file requires argument.");
3628 }
3629 break;
3630
3631 case COPY_FILES:
3632 if (unbase64) {
3633 *invalid_config = true;
3634 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "base64 decoding not supported for copy sources.");
3635 }
3636 break;
3637
3638 case CREATE_CHAR_DEVICE:
3639 case CREATE_BLOCK_DEVICE:
3640 if (unbase64) {
3641 *invalid_config = true;
3642 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "base64 decoding not supported for device node creation.");
3643 }
3644
3645 if (!i.argument) {
3646 *invalid_config = true;
3647 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "Device file requires argument.");
3648 }
3649
3650 r = parse_devnum(i.argument, &i.major_minor);
3651 if (r < 0) {
3652 *invalid_config = true;
3653 return log_syntax(NULL, LOG_ERR, fname, line, r, "Can't parse device file major/minor '%s'.", i.argument);
3654 }
3655
3656 break;
3657
3658 case SET_XATTR:
3659 case RECURSIVE_SET_XATTR:
3660 if (unbase64) {
3661 *invalid_config = true;
3662 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "base64 decoding not supported for extended attributes.");
3663 }
3664 if (!i.argument) {
3665 *invalid_config = true;
3666 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG),
3667 "Set extended attribute requires argument.");
3668 }
3669 r = parse_xattrs_from_arg(&i);
3670 if (r < 0)
3671 return r;
3672 break;
3673
3674 case SET_ACL:
3675 case RECURSIVE_SET_ACL:
3676 if (unbase64) {
3677 *invalid_config = true;
3678 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "base64 decoding not supported for ACLs.");
3679 }
3680 if (!i.argument) {
3681 *invalid_config = true;
3682 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG),
3683 "Set ACLs requires argument.");
3684 }
3685 r = parse_acls_from_arg(&i);
3686 if (r < 0)
3687 return r;
3688 break;
3689
3690 case SET_ATTRIBUTE:
3691 case RECURSIVE_SET_ATTRIBUTE:
3692 if (unbase64) {
3693 *invalid_config = true;
3694 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "base64 decoding not supported for file attributes.");
3695 }
3696 if (!i.argument) {
3697 *invalid_config = true;
3698 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG),
3699 "Set file attribute requires argument.");
3700 }
3701 r = parse_attribute_from_arg(&i);
3702 if (IN_SET(r, -EINVAL, -EBADSLT))
3703 *invalid_config = true;
3704 if (r < 0)
3705 return r;
3706 break;
3707
3708 default:
3709 *invalid_config = true;
3710 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG),
3711 "Unknown command type '%c'.", (char) i.type);
3712 }
3713
3714 if (!should_include_path(i.path))
3715 return 0;
3716
3717 if (!unbase64) {
3718 /* Do specifier expansion except if base64 mode is enabled */
3719 r = specifier_expansion_from_arg(specifier_table, &i);
3720 if (ERRNO_IS_NOINFO(r))
3721 return log_unresolvable_specifier(fname, line);
3722 if (r < 0) {
3723 if (IN_SET(r, -EINVAL, -EBADSLT))
3724 *invalid_config = true;
3725 return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to substitute specifiers in argument: %m");
3726 }
3727 }
3728
3729 switch (i.type) {
3730 case CREATE_SYMLINK:
3731 if (!i.argument) {
3732 i.argument = path_join("/usr/share/factory", i.path);
3733 if (!i.argument)
3734 return log_oom();
3735 }
3736 break;
3737
3738 case COPY_FILES:
3739 if (!i.argument) {
3740 i.argument = path_join("/usr/share/factory", i.path);
3741 if (!i.argument)
3742 return log_oom();
3743 } else if (!path_is_absolute(i.argument)) {
3744 *invalid_config = true;
3745 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), "Source path '%s' is not absolute.", i.argument);
3746
3747 }
3748
3749 if (!empty_or_root(arg_root)) {
3750 char *p;
3751
3752 p = path_join(arg_root, i.argument);
3753 if (!p)
3754 return log_oom();
3755 free_and_replace(i.argument, p);
3756 }
3757
3758 path_simplify(i.argument);
3759
3760 if (laccess(i.argument, F_OK) == -ENOENT) {
3761 /* Silently skip over lines where the source file is missing. */
3762 log_syntax(NULL, LOG_DEBUG, fname, line, 0, "Copy source path '%s' does not exist, skipping line.", i.argument);
3763 return 0;
3764 }
3765
3766 break;
3767
3768 default:
3769 break;
3770 }
3771
3772 if (from_cred) {
3773 if (!i.argument)
3774 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), "Reading from credential requested, but no credential name specified.");
3775 if (!credential_name_valid(i.argument))
3776 return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), "Credential name not valid: %s", i.argument);
3777
3778 r = read_credential(i.argument, &i.binary_argument, &i.binary_argument_size);
3779 if (IN_SET(r, -ENXIO, -ENOENT)) {
3780 /* Silently skip over lines that have no credentials passed */
3781 log_syntax(NULL, LOG_DEBUG, fname, line, 0,
3782 "Credential '%s' not specified, skipping line.", i.argument);
3783 return 0;
3784 }
3785 if (r < 0)
3786 return log_error_errno(r, "Failed to read credential '%s': %m", i.argument);
3787 }
3788
3789 /* If base64 decoding is requested, do so now */
3790 if (unbase64 && item_binary_argument(&i)) {
3791 _cleanup_free_ void *data = NULL;
3792 size_t data_size = 0;
3793
3794 r = unbase64mem_full(item_binary_argument(&i), item_binary_argument_size(&i), /* secure = */ false,
3795 &data, &data_size);
3796 if (r < 0)
3797 return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to base64 decode specified argument '%s': %m", i.argument);
3798
3799 free_and_replace(i.binary_argument, data);
3800 i.binary_argument_size = data_size;
3801 }
3802
3803 if (!empty_or_root(arg_root)) {
3804 char *p;
3805
3806 p = path_join(arg_root, i.path);
3807 if (!p)
3808 return log_oom();
3809 free_and_replace(i.path, p);
3810 }
3811
3812 if (!empty_or_dash(user)) {
3813 const char *u;
3814
3815 u = startswith(user, ":");
3816 if (u)
3817 i.uid_only_create = true;
3818 else
3819 u = user;
3820
3821 r = find_uid(u, &i.uid, uid_cache);
3822 if (r == -ESRCH && arg_graceful) {
3823 log_syntax(NULL, LOG_DEBUG, fname, line, r,
3824 "%s: user '%s' not found, not adjusting ownership.", i.path, u);
3825 missing_user_or_group = true;
3826 } else if (r < 0) {
3827 *invalid_config = true;
3828 return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to resolve user '%s': %m", u);
3829 } else
3830 i.uid_set = true;
3831 }
3832
3833 if (!empty_or_dash(group)) {
3834 const char *g;
3835
3836 g = startswith(group, ":");
3837 if (g)
3838 i.gid_only_create = true;
3839 else
3840 g = group;
3841
3842 r = find_gid(g, &i.gid, gid_cache);
3843 if (r == -ESRCH && arg_graceful) {
3844 log_syntax(NULL, LOG_DEBUG, fname, line, r,
3845 "%s: group '%s' not found, not adjusting ownership.", i.path, g);
3846 missing_user_or_group = true;
3847 } else if (r < 0) {
3848 *invalid_config = true;
3849 return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to resolve group '%s': %m", g);
3850 } else
3851 i.gid_set = true;
3852 }
3853
3854 if (!empty_or_dash(mode)) {
3855 const char *mm;
3856 unsigned m;
3857
3858 for (mm = mode;; mm++) {
3859 if (*mm == '~')
3860 i.mask_perms = true;
3861 else if (*mm == ':')
3862 i.mode_only_create = true;
3863 else
3864 break;
3865 }
3866
3867 r = parse_mode(mm, &m);
3868 if (r < 0) {
3869 *invalid_config = true;
3870 return log_syntax(NULL, LOG_ERR, fname, line, r, "Invalid mode '%s'.", mode);
3871 }
3872
3873 i.mode = m;
3874 i.mode_set = true;
3875 } else
3876 i.mode = IN_SET(i.type,
3877 CREATE_DIRECTORY,
3878 TRUNCATE_DIRECTORY,
3879 CREATE_SUBVOLUME,
3880 CREATE_SUBVOLUME_INHERIT_QUOTA,
3881 CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
3882
3883 if (missing_user_or_group && (i.mode & ~0777) != 0) {
3884 /* Refuse any special bits for nodes where we couldn't resolve the ownership properly. */
3885 mode_t adjusted = i.mode & 0777;
3886 log_syntax(NULL, LOG_INFO, fname, line, 0,
3887 "Changing mode 0%o to 0%o because of changed ownership.", i.mode, adjusted);
3888 i.mode = adjusted;
3889 }
3890
3891 if (!empty_or_dash(age)) {
3892 const char *a = age;
3893 _cleanup_free_ char *seconds = NULL, *age_by = NULL;
3894
3895 if (*a == '~') {
3896 i.keep_first_level = true;
3897 a++;
3898 }
3899
3900 /* Format: "age-by:age"; where age-by is "[abcmABCM]+". */
3901 r = split_pair(a, ":", &age_by, &seconds);
3902 if (r == -ENOMEM)
3903 return log_oom();
3904 if (r < 0 && r != -EINVAL)
3905 return log_error_errno(r, "Failed to parse age-by for '%s': %m", age);
3906 if (r >= 0) {
3907 /* We found a ":", parse the "age-by" part. */
3908 r = parse_age_by_from_arg(age_by, &i);
3909 if (r == -ENOMEM)
3910 return log_oom();
3911 if (r < 0) {
3912 *invalid_config = true;
3913 return log_syntax(NULL, LOG_ERR, fname, line, r, "Invalid age-by '%s'.", age_by);
3914 }
3915
3916 /* For parsing the "age" part, after the ":". */
3917 a = seconds;
3918 }
3919
3920 r = parse_sec(a, &i.age);
3921 if (r < 0) {
3922 *invalid_config = true;
3923 return log_syntax(NULL, LOG_ERR, fname, line, r, "Invalid age '%s'.", a);
3924 }
3925
3926 i.age_set = true;
3927 }
3928
3929 h = needs_glob(i.type) ? c->globs : c->items;
3930
3931 existing = ordered_hashmap_get(h, i.path);
3932 if (existing) {
3933 if (is_duplicated_item(existing, &i)) {
3934 log_syntax(NULL, LOG_NOTICE, fname, line, 0,
3935 "Duplicate line for path \"%s\", ignoring.", i.path);
3936 return 0;
3937 }
3938 } else {
3939 existing = new0(ItemArray, 1);
3940 if (!existing)
3941 return log_oom();
3942
3943 r = ordered_hashmap_put(h, i.path, existing);
3944 if (r < 0) {
3945 free(existing);
3946 return log_oom();
3947 }
3948 }
3949
3950 if (!GREEDY_REALLOC(existing->items, existing->n_items + 1))
3951 return log_oom();
3952
3953 existing->items[existing->n_items++] = TAKE_STRUCT(i);
3954
3955 /* Sort item array, to enforce stable ordering of application */
3956 typesafe_qsort(existing->items, existing->n_items, item_compare);
3957
3958 return 0;
3959 }
3960
3961 static int cat_config(char **config_dirs, char **args) {
3962 _cleanup_strv_free_ char **files = NULL;
3963 int r;
3964
3965 r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, NULL);
3966 if (r < 0)
3967 return r;
3968
3969 pager_open(arg_pager_flags);
3970
3971 return cat_files(NULL, files, arg_cat_flags);
3972 }
3973
3974 static int exclude_default_prefixes(void) {
3975 int r;
3976
3977 /* Provide an easy way to exclude virtual/memory file systems from what we do here. Useful in
3978 * combination with --root= where we probably don't want to apply stuff to these dirs as they are
3979 * likely over-mounted if the root directory is actually used, and it wouldbe less than ideal to have
3980 * all kinds of files created/adjusted underneath these mount points. */
3981
3982 r = strv_extend_many(
3983 &arg_exclude_prefixes,
3984 "/dev",
3985 "/proc",
3986 "/run",
3987 "/sys");
3988 if (r < 0)
3989 return log_oom();
3990
3991 strv_uniq(arg_exclude_prefixes);
3992 return 0;
3993 }
3994
3995 static int help(void) {
3996 _cleanup_free_ char *link = NULL;
3997 int r;
3998
3999 r = terminal_urlify_man("systemd-tmpfiles", "8", &link);
4000 if (r < 0)
4001 return log_oom();
4002
4003 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n"
4004 "\n%sCreates, deletes and cleans up volatile and temporary files and directories.%s\n\n"
4005 " -h --help Show this help\n"
4006 " --user Execute user configuration\n"
4007 " --version Show package version\n"
4008 " --cat-config Show configuration files\n"
4009 " --tldr Show non-comment parts of configuration\n"
4010 " --create Create marked files/directories\n"
4011 " --clean Clean up marked directories\n"
4012 " --remove Remove marked files/directories\n"
4013 " --boot Execute actions only safe at boot\n"
4014 " --graceful Quietly ignore unknown users or groups\n"
4015 " --purge Delete all files owned by the configuration files\n"
4016 " --prefix=PATH Only apply rules with the specified prefix\n"
4017 " --exclude-prefix=PATH Ignore rules with the specified prefix\n"
4018 " -E Ignore rules prefixed with /dev, /proc, /run, /sys\n"
4019 " --root=PATH Operate on an alternate filesystem root\n"
4020 " --image=PATH Operate on disk image as filesystem root\n"
4021 " --image-policy=POLICY Specify disk image dissection policy\n"
4022 " --replace=PATH Treat arguments as replacement for PATH\n"
4023 " --no-pager Do not pipe output into a pager\n"
4024 "\nSee the %s for details.\n",
4025 program_invocation_short_name,
4026 ansi_highlight(),
4027 ansi_normal(),
4028 link);
4029
4030 return 0;
4031 }
4032
4033 static int parse_argv(int argc, char *argv[]) {
4034
4035 enum {
4036 ARG_VERSION = 0x100,
4037 ARG_CAT_CONFIG,
4038 ARG_TLDR,
4039 ARG_USER,
4040 ARG_CREATE,
4041 ARG_CLEAN,
4042 ARG_REMOVE,
4043 ARG_PURGE,
4044 ARG_BOOT,
4045 ARG_GRACEFUL,
4046 ARG_PREFIX,
4047 ARG_EXCLUDE_PREFIX,
4048 ARG_ROOT,
4049 ARG_IMAGE,
4050 ARG_IMAGE_POLICY,
4051 ARG_REPLACE,
4052 ARG_NO_PAGER,
4053 };
4054
4055 static const struct option options[] = {
4056 { "help", no_argument, NULL, 'h' },
4057 { "user", no_argument, NULL, ARG_USER },
4058 { "version", no_argument, NULL, ARG_VERSION },
4059 { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
4060 { "tldr", no_argument, NULL, ARG_TLDR },
4061 { "create", no_argument, NULL, ARG_CREATE },
4062 { "clean", no_argument, NULL, ARG_CLEAN },
4063 { "remove", no_argument, NULL, ARG_REMOVE },
4064 { "purge", no_argument, NULL, ARG_PURGE },
4065 { "boot", no_argument, NULL, ARG_BOOT },
4066 { "graceful", no_argument, NULL, ARG_GRACEFUL },
4067 { "prefix", required_argument, NULL, ARG_PREFIX },
4068 { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
4069 { "root", required_argument, NULL, ARG_ROOT },
4070 { "image", required_argument, NULL, ARG_IMAGE },
4071 { "image-policy", required_argument, NULL, ARG_IMAGE_POLICY },
4072 { "replace", required_argument, NULL, ARG_REPLACE },
4073 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
4074 {}
4075 };
4076
4077 int c, r;
4078
4079 assert(argc >= 0);
4080 assert(argv);
4081
4082 while ((c = getopt_long(argc, argv, "hE", options, NULL)) >= 0)
4083
4084 switch (c) {
4085
4086 case 'h':
4087 return help();
4088
4089 case ARG_VERSION:
4090 return version();
4091
4092 case ARG_CAT_CONFIG:
4093 arg_cat_flags = CAT_CONFIG_ON;
4094 break;
4095
4096 case ARG_TLDR:
4097 arg_cat_flags = CAT_TLDR;
4098 break;
4099
4100 case ARG_USER:
4101 arg_runtime_scope = RUNTIME_SCOPE_USER;
4102 break;
4103
4104 case ARG_CREATE:
4105 arg_operation |= OPERATION_CREATE;
4106 break;
4107
4108 case ARG_CLEAN:
4109 arg_operation |= OPERATION_CLEAN;
4110 break;
4111
4112 case ARG_REMOVE:
4113 arg_operation |= OPERATION_REMOVE;
4114 break;
4115
4116 case ARG_BOOT:
4117 arg_boot = true;
4118 break;
4119
4120 case ARG_PURGE:
4121 arg_operation |= OPERATION_PURGE;
4122 break;
4123
4124 case ARG_GRACEFUL:
4125 arg_graceful = true;
4126 break;
4127
4128 case ARG_PREFIX:
4129 if (strv_extend(&arg_include_prefixes, optarg) < 0)
4130 return log_oom();
4131 break;
4132
4133 case ARG_EXCLUDE_PREFIX:
4134 if (strv_extend(&arg_exclude_prefixes, optarg) < 0)
4135 return log_oom();
4136 break;
4137
4138 case ARG_ROOT:
4139 r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_root);
4140 if (r < 0)
4141 return r;
4142 break;
4143
4144 case ARG_IMAGE:
4145 #ifdef STANDALONE
4146 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
4147 "This systemd-tmpfiles version is compiled without support for --image=.");
4148 #else
4149 r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_image);
4150 if (r < 0)
4151 return r;
4152 #endif
4153 /* Imply -E here since it makes little sense to create files persistently in the /run mountpoint of a disk image */
4154 _fallthrough_;
4155
4156 case 'E':
4157 r = exclude_default_prefixes();
4158 if (r < 0)
4159 return r;
4160
4161 break;
4162
4163 case ARG_IMAGE_POLICY:
4164 r = parse_image_policy_argument(optarg, &arg_image_policy);
4165 if (r < 0)
4166 return r;
4167 break;
4168
4169 case ARG_REPLACE:
4170 if (!path_is_absolute(optarg) ||
4171 !endswith(optarg, ".conf"))
4172 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
4173 "The argument to --replace= must an absolute path to a config file");
4174
4175 arg_replace = optarg;
4176 break;
4177
4178 case ARG_NO_PAGER:
4179 arg_pager_flags |= PAGER_DISABLE;
4180 break;
4181
4182 case '?':
4183 return -EINVAL;
4184
4185 default:
4186 assert_not_reached();
4187 }
4188
4189 if (arg_operation == 0 && arg_cat_flags == CAT_CONFIG_OFF)
4190 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
4191 "You need to specify at least one of --clean, --create, --remove, or --purge.");
4192
4193 if (arg_replace && arg_cat_flags != CAT_CONFIG_OFF)
4194 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
4195 "Option --replace= is not supported with --cat-config/--tldr.");
4196
4197 if (arg_replace && optind >= argc)
4198 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
4199 "When --replace= is given, some configuration items must be specified.");
4200
4201 if (arg_root && arg_runtime_scope == RUNTIME_SCOPE_USER)
4202 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
4203 "Combination of --user and --root= is not supported.");
4204
4205 if (arg_image && arg_root)
4206 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported.");
4207
4208 return 1;
4209 }
4210
4211 static int read_config_file(
4212 Context *c,
4213 char **config_dirs,
4214 const char *fn,
4215 bool ignore_enoent,
4216 bool *invalid_config) {
4217
4218 _cleanup_hashmap_free_ Hashmap *uid_cache = NULL, *gid_cache = NULL;
4219 _cleanup_fclose_ FILE *_f = NULL;
4220 _cleanup_free_ char *pp = NULL;
4221 unsigned v = 0;
4222 FILE *f;
4223 ItemArray *ia;
4224 int r = 0;
4225
4226 assert(c);
4227 assert(fn);
4228
4229 if (streq(fn, "-")) {
4230 log_debug("Reading config from stdin%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS));
4231 fn = "<stdin>";
4232 f = stdin;
4233 } else {
4234 r = search_and_fopen(fn, "re", arg_root, (const char**) config_dirs, &_f, &pp);
4235 if (r < 0) {
4236 if (ignore_enoent && r == -ENOENT) {
4237 log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
4238 return 0;
4239 }
4240
4241 return log_error_errno(r, "Failed to open '%s': %m", fn);
4242 }
4243
4244 log_debug("Reading config file \"%s\"%s", pp, special_glyph(SPECIAL_GLYPH_ELLIPSIS));
4245 fn = pp;
4246 f = _f;
4247 }
4248
4249 for (;;) {
4250 _cleanup_free_ char *line = NULL;
4251 bool invalid_line = false;
4252 int k;
4253
4254 k = read_stripped_line(f, LONG_LINE_MAX, &line);
4255 if (k < 0)
4256 return log_error_errno(k, "Failed to read '%s': %m", fn);
4257 if (k == 0)
4258 break;
4259
4260 v++;
4261
4262 if (IN_SET(line[0], 0, '#'))
4263 continue;
4264
4265 k = parse_line(c, fn, v, line, &invalid_line, &uid_cache, &gid_cache);
4266 if (k < 0) {
4267 if (invalid_line)
4268 /* Allow reporting with a special code if the caller requested this */
4269 *invalid_config = true;
4270 else if (r == 0)
4271 /* The first error becomes our return value */
4272 r = k;
4273 }
4274 }
4275
4276 /* we have to determine age parameter for each entry of type X */
4277 ORDERED_HASHMAP_FOREACH(ia, c->globs)
4278 for (size_t ni = 0; ni < ia->n_items; ni++) {
4279 ItemArray *ja;
4280 Item *i = ia->items + ni, *candidate_item = NULL;
4281
4282 if (i->type != IGNORE_DIRECTORY_PATH)
4283 continue;
4284
4285 ORDERED_HASHMAP_FOREACH(ja, c->items)
4286 for (size_t nj = 0; nj < ja->n_items; nj++) {
4287 Item *j = ja->items + nj;
4288
4289 if (!IN_SET(j->type, CREATE_DIRECTORY,
4290 TRUNCATE_DIRECTORY,
4291 CREATE_SUBVOLUME,
4292 CREATE_SUBVOLUME_INHERIT_QUOTA,
4293 CREATE_SUBVOLUME_NEW_QUOTA))
4294 continue;
4295
4296 if (path_equal(j->path, i->path)) {
4297 candidate_item = j;
4298 break;
4299 }
4300
4301 if (candidate_item
4302 ? (path_startswith(j->path, candidate_item->path) && fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)
4303 : path_startswith(i->path, j->path) != NULL)
4304 candidate_item = j;
4305 }
4306
4307 if (candidate_item && candidate_item->age_set) {
4308 i->age = candidate_item->age;
4309 i->age_set = true;
4310 }
4311 }
4312
4313 if (ferror(f)) {
4314 log_error_errno(errno, "Failed to read from file %s: %m", fn);
4315 if (r == 0)
4316 r = -EIO;
4317 }
4318
4319 return r;
4320 }
4321
4322 static int parse_arguments(
4323 Context *c,
4324 char **config_dirs,
4325 char **args,
4326 bool *invalid_config) {
4327 int r;
4328
4329 assert(c);
4330
4331 STRV_FOREACH(arg, args) {
4332 r = read_config_file(c, config_dirs, *arg, false, invalid_config);
4333 if (r < 0)
4334 return r;
4335 }
4336
4337 return 0;
4338 }
4339
4340 static int read_config_files(
4341 Context *c,
4342 char **config_dirs,
4343 char **args,
4344 bool *invalid_config) {
4345
4346 _cleanup_strv_free_ char **files = NULL;
4347 _cleanup_free_ char *p = NULL;
4348 int r;
4349
4350 assert(c);
4351
4352 r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, &p);
4353 if (r < 0)
4354 return r;
4355
4356 STRV_FOREACH(f, files)
4357 if (p && path_equal(*f, p)) {
4358 log_debug("Parsing arguments at position \"%s\"%s", *f, special_glyph(SPECIAL_GLYPH_ELLIPSIS));
4359
4360 r = parse_arguments(c, config_dirs, args, invalid_config);
4361 if (r < 0)
4362 return r;
4363 } else
4364 /* Just warn, ignore result otherwise.
4365 * read_config_file() has some debug output, so no need to print anything. */
4366 (void) read_config_file(c, config_dirs, *f, true, invalid_config);
4367
4368 return 0;
4369 }
4370
4371 static int read_credential_lines(Context *c, bool *invalid_config) {
4372
4373 _cleanup_free_ char *j = NULL;
4374 const char *d;
4375 int r;
4376
4377 assert(c);
4378
4379 r = get_credentials_dir(&d);
4380 if (r == -ENXIO)
4381 return 0;
4382 if (r < 0)
4383 return log_error_errno(r, "Failed to get credentials directory: %m");
4384
4385 j = path_join(d, "tmpfiles.extra");
4386 if (!j)
4387 return log_oom();
4388
4389 (void) read_config_file(c, /* config_dirs= */ NULL, j, /* ignore_enoent= */ true, invalid_config);
4390 return 0;
4391 }
4392
4393 static int link_parent(Context *c, ItemArray *a) {
4394 const char *path;
4395 char *prefix;
4396 int r;
4397
4398 assert(c);
4399 assert(a);
4400
4401 /* Finds the closest "parent" item array for the specified item array. Then registers the specified item array
4402 * as child of it, and fills the parent in, linking them both ways. This allows us to later create parents
4403 * before their children, and clean up/remove children before their parents. */
4404
4405 if (a->n_items <= 0)
4406 return 0;
4407
4408 path = a->items[0].path;
4409 prefix = newa(char, strlen(path) + 1);
4410 PATH_FOREACH_PREFIX(prefix, path) {
4411 ItemArray *j;
4412
4413 j = ordered_hashmap_get(c->items, prefix);
4414 if (!j)
4415 j = ordered_hashmap_get(c->globs, prefix);
4416 if (j) {
4417 r = set_ensure_put(&j->children, NULL, a);
4418 if (r < 0)
4419 return log_oom();
4420
4421 a->parent = j;
4422 return 1;
4423 }
4424 }
4425
4426 return 0;
4427 }
4428
4429 DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_array_hash_ops, char, string_hash_func, string_compare_func,
4430 ItemArray, item_array_free);
4431
4432 static int run(int argc, char *argv[]) {
4433 #ifndef STANDALONE
4434 _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
4435 _cleanup_(umount_and_freep) char *mounted_dir = NULL;
4436 #endif
4437 _cleanup_strv_free_ char **config_dirs = NULL;
4438 _cleanup_(context_done) Context c = {};
4439 bool invalid_config = false;
4440 ItemArray *a;
4441 enum {
4442 PHASE_PURGE,
4443 PHASE_REMOVE_AND_CLEAN,
4444 PHASE_CREATE,
4445 _PHASE_MAX
4446 } phase;
4447 int r, k;
4448
4449 r = parse_argv(argc, argv);
4450 if (r <= 0)
4451 return r;
4452
4453 log_setup();
4454
4455 /* We require /proc/ for a lot of our operations, i.e. for adjusting access modes, for anything
4456 * SELinux related, for recursive operation, for xattr, acl and chattr handling, for btrfs stuff and
4457 * a lot more. It's probably the majority of invocations where /proc/ is required. Since people
4458 * apparently invoke it without anyway and are surprised about the failures, let's catch this early
4459 * and output a nice and friendly warning. */
4460 if (proc_mounted() == 0)
4461 return log_error_errno(SYNTHETIC_ERRNO(ENOSYS),
4462 "/proc/ is not mounted, but required for successful operation of systemd-tmpfiles. "
4463 "Please mount /proc/. Alternatively, consider using the --root= or --image= switches.");
4464
4465 /* Descending down file system trees might take a lot of fds */
4466 (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE);
4467
4468 switch (arg_runtime_scope) {
4469
4470 case RUNTIME_SCOPE_USER:
4471 r = user_config_paths(&config_dirs);
4472 if (r < 0)
4473 return log_error_errno(r, "Failed to initialize configuration directory list: %m");
4474 break;
4475
4476 case RUNTIME_SCOPE_SYSTEM:
4477 config_dirs = strv_split_nulstr(CONF_PATHS_NULSTR("tmpfiles.d"));
4478 if (!config_dirs)
4479 return log_oom();
4480 break;
4481
4482 default:
4483 assert_not_reached();
4484 }
4485
4486 if (DEBUG_LOGGING) {
4487 _cleanup_free_ char *t = NULL;
4488
4489 STRV_FOREACH(i, config_dirs) {
4490 _cleanup_free_ char *j = NULL;
4491
4492 j = path_join(arg_root, *i);
4493 if (!j)
4494 return log_oom();
4495
4496 if (!strextend(&t, "\n\t", j))
4497 return log_oom();
4498 }
4499
4500 log_debug("Looking for configuration files in (higher priority first):%s", t);
4501 }
4502
4503 if (arg_cat_flags != CAT_CONFIG_OFF)
4504 return cat_config(config_dirs, argv + optind);
4505
4506 umask(0022);
4507
4508 r = mac_init();
4509 if (r < 0)
4510 return r;
4511
4512 #ifndef STANDALONE
4513 if (arg_image) {
4514 assert(!arg_root);
4515
4516 r = mount_image_privately_interactively(
4517 arg_image,
4518 arg_image_policy,
4519 DISSECT_IMAGE_GENERIC_ROOT |
4520 DISSECT_IMAGE_REQUIRE_ROOT |
4521 DISSECT_IMAGE_VALIDATE_OS |
4522 DISSECT_IMAGE_RELAX_VAR_CHECK |
4523 DISSECT_IMAGE_FSCK |
4524 DISSECT_IMAGE_GROWFS,
4525 &mounted_dir,
4526 /* ret_dir_fd= */ NULL,
4527 &loop_device);
4528 if (r < 0)
4529 return r;
4530
4531 arg_root = strdup(mounted_dir);
4532 if (!arg_root)
4533 return log_oom();
4534 }
4535 #else
4536 assert(!arg_image);
4537 #endif
4538
4539 c.items = ordered_hashmap_new(&item_array_hash_ops);
4540 c.globs = ordered_hashmap_new(&item_array_hash_ops);
4541 if (!c.items || !c.globs)
4542 return log_oom();
4543
4544 /* If command line arguments are specified along with --replace, read all
4545 * configuration files and insert the positional arguments at the specified
4546 * place. Otherwise, if command line arguments are specified, execute just
4547 * them, and finally, without --replace= or any positional arguments, just
4548 * read configuration and execute it.
4549 */
4550 if (arg_replace || optind >= argc)
4551 r = read_config_files(&c, config_dirs, argv + optind, &invalid_config);
4552 else
4553 r = parse_arguments(&c, config_dirs, argv + optind, &invalid_config);
4554 if (r < 0)
4555 return r;
4556
4557 r = read_credential_lines(&c, &invalid_config);
4558 if (r < 0)
4559 return r;
4560
4561 /* Let's now link up all child/parent relationships */
4562 ORDERED_HASHMAP_FOREACH(a, c.items) {
4563 r = link_parent(&c, a);
4564 if (r < 0)
4565 return r;
4566 }
4567 ORDERED_HASHMAP_FOREACH(a, c.globs) {
4568 r = link_parent(&c, a);
4569 if (r < 0)
4570 return r;
4571 }
4572
4573 /* If multiple operations are requested, let's first run the remove/clean operations, and only then the create
4574 * operations. i.e. that we first clean out the platform we then build on. */
4575 for (phase = 0; phase < _PHASE_MAX; phase++) {
4576 OperationMask op;
4577
4578 if (phase == PHASE_PURGE)
4579 op = arg_operation & OPERATION_PURGE;
4580 else if (phase == PHASE_REMOVE_AND_CLEAN)
4581 op = arg_operation & (OPERATION_REMOVE|OPERATION_CLEAN);
4582 else if (phase == PHASE_CREATE)
4583 op = arg_operation & OPERATION_CREATE;
4584 else
4585 assert_not_reached();
4586
4587 if (op == 0) /* Nothing requested in this phase */
4588 continue;
4589
4590 /* The non-globbing ones usually create things, hence we apply them first */
4591 ORDERED_HASHMAP_FOREACH(a, c.items) {
4592 k = process_item_array(&c, a, op);
4593 if (k < 0 && r >= 0)
4594 r = k;
4595 }
4596
4597 /* The globbing ones usually alter things, hence we apply them second. */
4598 ORDERED_HASHMAP_FOREACH(a, c.globs) {
4599 k = process_item_array(&c, a, op);
4600 if (k < 0 && r >= 0)
4601 r = k;
4602 }
4603 }
4604
4605 if (ERRNO_IS_RESOURCE(r))
4606 return r;
4607 if (invalid_config)
4608 return EX_DATAERR;
4609 if (r < 0)
4610 return EX_CANTCREAT;
4611 return 0;
4612 }
4613
4614 DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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