Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 :
3 : #include <errno.h>
4 : #include <fcntl.h>
5 : #include <fnmatch.h>
6 : #include <getopt.h>
7 : #include <glob.h>
8 : #include <limits.h>
9 : #include <linux/fs.h>
10 : #include <stdbool.h>
11 : #include <stddef.h>
12 : #include <stdio.h>
13 : #include <stdlib.h>
14 : #include <string.h>
15 : #include <sys/file.h>
16 : #include <sys/stat.h>
17 : #include <sys/xattr.h>
18 : #include <sysexits.h>
19 : #include <time.h>
20 : #include <unistd.h>
21 :
22 : #include "sd-path.h"
23 :
24 : #include "acl-util.h"
25 : #include "alloc-util.h"
26 : #include "btrfs-util.h"
27 : #include "capability-util.h"
28 : #include "chattr-util.h"
29 : #include "conf-files.h"
30 : #include "copy.h"
31 : #include "def.h"
32 : #include "dirent-util.h"
33 : #include "escape.h"
34 : #include "fd-util.h"
35 : #include "fileio.h"
36 : #include "format-util.h"
37 : #include "fs-util.h"
38 : #include "glob-util.h"
39 : #include "io-util.h"
40 : #include "label.h"
41 : #include "log.h"
42 : #include "macro.h"
43 : #include "main-func.h"
44 : #include "missing.h"
45 : #include "mkdir.h"
46 : #include "mountpoint-util.h"
47 : #include "pager.h"
48 : #include "parse-util.h"
49 : #include "path-lookup.h"
50 : #include "path-util.h"
51 : #include "pretty-print.h"
52 : #include "rlimit-util.h"
53 : #include "rm-rf.h"
54 : #include "selinux-util.h"
55 : #include "set.h"
56 : #include "sort-util.h"
57 : #include "specifier.h"
58 : #include "stat-util.h"
59 : #include "stdio-util.h"
60 : #include "string-table.h"
61 : #include "string-util.h"
62 : #include "strv.h"
63 : #include "umask-util.h"
64 : #include "user-util.h"
65 :
66 : /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
67 : * them in the file system. This is intended to be used to create
68 : * properly owned directories beneath /tmp, /var/tmp, /run, which are
69 : * volatile and hence need to be recreated on bootup. */
70 :
71 : typedef enum OperationMask {
72 : OPERATION_CREATE = 1 << 0,
73 : OPERATION_REMOVE = 1 << 1,
74 : OPERATION_CLEAN = 1 << 2,
75 : } OperationMask;
76 :
77 : typedef enum ItemType {
78 : /* These ones take file names */
79 : CREATE_FILE = 'f',
80 : TRUNCATE_FILE = 'F',
81 : CREATE_DIRECTORY = 'd',
82 : TRUNCATE_DIRECTORY = 'D',
83 : CREATE_SUBVOLUME = 'v',
84 : CREATE_SUBVOLUME_INHERIT_QUOTA = 'q',
85 : CREATE_SUBVOLUME_NEW_QUOTA = 'Q',
86 : CREATE_FIFO = 'p',
87 : CREATE_SYMLINK = 'L',
88 : CREATE_CHAR_DEVICE = 'c',
89 : CREATE_BLOCK_DEVICE = 'b',
90 : COPY_FILES = 'C',
91 :
92 : /* These ones take globs */
93 : WRITE_FILE = 'w',
94 : EMPTY_DIRECTORY = 'e',
95 : SET_XATTR = 't',
96 : RECURSIVE_SET_XATTR = 'T',
97 : SET_ACL = 'a',
98 : RECURSIVE_SET_ACL = 'A',
99 : SET_ATTRIBUTE = 'h',
100 : RECURSIVE_SET_ATTRIBUTE = 'H',
101 : IGNORE_PATH = 'x',
102 : IGNORE_DIRECTORY_PATH = 'X',
103 : REMOVE_PATH = 'r',
104 : RECURSIVE_REMOVE_PATH = 'R',
105 : RELABEL_PATH = 'z',
106 : RECURSIVE_RELABEL_PATH = 'Z',
107 : ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */
108 : } ItemType;
109 :
110 : typedef struct Item {
111 : ItemType type;
112 :
113 : char *path;
114 : char *argument;
115 : char **xattrs;
116 : #if HAVE_ACL
117 : acl_t acl_access;
118 : acl_t acl_default;
119 : #endif
120 : uid_t uid;
121 : gid_t gid;
122 : mode_t mode;
123 : usec_t age;
124 :
125 : dev_t major_minor;
126 : unsigned attribute_value;
127 : unsigned attribute_mask;
128 :
129 : bool uid_set:1;
130 : bool gid_set:1;
131 : bool mode_set:1;
132 : bool age_set:1;
133 : bool mask_perms:1;
134 : bool attribute_set:1;
135 :
136 : bool keep_first_level:1;
137 :
138 : bool force:1;
139 :
140 : bool allow_failure:1;
141 :
142 : OperationMask done;
143 : } Item;
144 :
145 : typedef struct ItemArray {
146 : Item *items;
147 : size_t n_items;
148 : size_t allocated;
149 :
150 : struct ItemArray *parent;
151 : Set *children;
152 : } ItemArray;
153 :
154 : typedef enum DirectoryType {
155 : DIRECTORY_RUNTIME,
156 : DIRECTORY_STATE,
157 : DIRECTORY_CACHE,
158 : DIRECTORY_LOGS,
159 : _DIRECTORY_TYPE_MAX,
160 : } DirectoryType;
161 :
162 : static bool arg_cat_config = false;
163 : static bool arg_user = false;
164 : static OperationMask arg_operation = 0;
165 : static bool arg_boot = false;
166 : static PagerFlags arg_pager_flags = 0;
167 :
168 : static char **arg_include_prefixes = NULL;
169 : static char **arg_exclude_prefixes = NULL;
170 : static char *arg_root = NULL;
171 : static char *arg_replace = NULL;
172 :
173 : #define MAX_DEPTH 256
174 :
175 : static OrderedHashmap *items = NULL, *globs = NULL;
176 : static Set *unix_sockets = NULL;
177 :
178 86 : STATIC_DESTRUCTOR_REGISTER(items, ordered_hashmap_freep);
179 86 : STATIC_DESTRUCTOR_REGISTER(globs, ordered_hashmap_freep);
180 86 : STATIC_DESTRUCTOR_REGISTER(unix_sockets, set_free_freep);
181 86 : STATIC_DESTRUCTOR_REGISTER(arg_include_prefixes, freep);
182 86 : STATIC_DESTRUCTOR_REGISTER(arg_exclude_prefixes, freep);
183 86 : STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
184 :
185 : static int specifier_machine_id_safe(char specifier, const void *data, const void *userdata, char **ret);
186 : static int specifier_directory(char specifier, const void *data, const void *userdata, char **ret);
187 :
188 : static const Specifier specifier_table[] = {
189 : { 'm', specifier_machine_id_safe, NULL },
190 : { 'b', specifier_boot_id, NULL },
191 : { 'H', specifier_host_name, NULL },
192 : { 'v', specifier_kernel_release, NULL },
193 :
194 : { 'g', specifier_group_name, NULL },
195 : { 'G', specifier_group_id, NULL },
196 : { 'U', specifier_user_id, NULL },
197 : { 'u', specifier_user_name, NULL },
198 : { 'h', specifier_user_home, NULL },
199 :
200 : { 't', specifier_directory, UINT_TO_PTR(DIRECTORY_RUNTIME) },
201 : { 'S', specifier_directory, UINT_TO_PTR(DIRECTORY_STATE) },
202 : { 'C', specifier_directory, UINT_TO_PTR(DIRECTORY_CACHE) },
203 : { 'L', specifier_directory, UINT_TO_PTR(DIRECTORY_LOGS) },
204 : { 'T', specifier_tmp_dir, NULL },
205 : { 'V', specifier_var_tmp_dir, NULL },
206 : {}
207 : };
208 :
209 2 : static int specifier_machine_id_safe(char specifier, const void *data, const void *userdata, char **ret) {
210 : int r;
211 :
212 : /* If /etc/machine_id is missing or empty (e.g. in a chroot environment)
213 : * return a recognizable error so that the caller can skip the rule
214 : * gracefully. */
215 :
216 2 : r = specifier_machine_id(specifier, data, userdata, ret);
217 2 : if (IN_SET(r, -ENOENT, -ENOMEDIUM))
218 0 : return -ENXIO;
219 :
220 2 : return r;
221 : }
222 :
223 6 : static int specifier_directory(char specifier, const void *data, const void *userdata, char **ret) {
224 : struct table_entry {
225 : uint64_t type;
226 : const char *suffix;
227 : };
228 :
229 : static const struct table_entry paths_system[] = {
230 : [DIRECTORY_RUNTIME] = { SD_PATH_SYSTEM_RUNTIME },
231 : [DIRECTORY_STATE] = { SD_PATH_SYSTEM_STATE_PRIVATE },
232 : [DIRECTORY_CACHE] = { SD_PATH_SYSTEM_STATE_CACHE },
233 : [DIRECTORY_LOGS] = { SD_PATH_SYSTEM_STATE_LOGS },
234 : };
235 :
236 : static const struct table_entry paths_user[] = {
237 : [DIRECTORY_RUNTIME] = { SD_PATH_USER_RUNTIME },
238 : [DIRECTORY_STATE] = { SD_PATH_USER_CONFIGURATION },
239 : [DIRECTORY_CACHE] = { SD_PATH_USER_STATE_CACHE },
240 : [DIRECTORY_LOGS] = { SD_PATH_USER_CONFIGURATION, "log" },
241 : };
242 :
243 : unsigned i;
244 : const struct table_entry *paths;
245 :
246 : assert_cc(ELEMENTSOF(paths_system) == ELEMENTSOF(paths_user));
247 6 : paths = arg_user ? paths_user : paths_system;
248 :
249 6 : i = PTR_TO_UINT(data);
250 6 : assert(i < ELEMENTSOF(paths_system));
251 :
252 6 : return sd_path_home(paths[i].type, paths[i].suffix, ret);
253 : }
254 :
255 1 : static int log_unresolvable_specifier(const char *filename, unsigned line) {
256 : static bool notified = false;
257 :
258 : /* In system mode, this is called when /etc is not fully initialized (e.g.
259 : * in a chroot environment) where some specifiers are unresolvable. In user
260 : * mode, this is called when some variables are not defined. These cases are
261 : * not considered as an error so log at LOG_NOTICE only for the first time
262 : * and then downgrade this to LOG_DEBUG for the rest. */
263 :
264 1 : log_full(notified ? LOG_DEBUG : LOG_NOTICE,
265 : "[%s:%u] Failed to resolve specifier: %s, skipping",
266 : filename, line,
267 : arg_user ? "Required $XDG_... variable not defined" : "uninitialized /etc detected");
268 :
269 1 : if (!notified)
270 1 : log_notice("All rules containing unresolvable specifiers will be skipped.");
271 :
272 1 : notified = true;
273 1 : return 0;
274 : }
275 :
276 40 : static int user_config_paths(char*** ret) {
277 40 : _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
278 40 : _cleanup_free_ char *persistent_config = NULL, *runtime_config = NULL, *data_home = NULL;
279 40 : _cleanup_strv_free_ char **res = NULL;
280 : int r;
281 :
282 40 : r = xdg_user_dirs(&config_dirs, &data_dirs);
283 40 : if (r < 0)
284 0 : return r;
285 :
286 40 : r = xdg_user_config_dir(&persistent_config, "/user-tmpfiles.d");
287 40 : if (r < 0 && r != -ENXIO)
288 0 : return r;
289 :
290 40 : r = xdg_user_runtime_dir(&runtime_config, "/user-tmpfiles.d");
291 40 : if (r < 0 && r != -ENXIO)
292 0 : return r;
293 :
294 40 : r = xdg_user_data_dir(&data_home, "/user-tmpfiles.d");
295 40 : if (r < 0 && r != -ENXIO)
296 0 : return r;
297 :
298 40 : r = strv_extend_strv_concat(&res, config_dirs, "/user-tmpfiles.d");
299 40 : if (r < 0)
300 0 : return r;
301 :
302 40 : r = strv_extend(&res, persistent_config);
303 40 : if (r < 0)
304 0 : return r;
305 :
306 40 : r = strv_extend(&res, runtime_config);
307 40 : if (r < 0)
308 0 : return r;
309 :
310 40 : r = strv_extend(&res, data_home);
311 40 : if (r < 0)
312 0 : return r;
313 :
314 40 : r = strv_extend_strv_concat(&res, data_dirs, "/user-tmpfiles.d");
315 40 : if (r < 0)
316 0 : return r;
317 :
318 40 : r = path_strv_make_absolute_cwd(res);
319 40 : if (r < 0)
320 0 : return r;
321 :
322 40 : *ret = TAKE_PTR(res);
323 40 : return 0;
324 : }
325 :
326 27 : static bool needs_glob(ItemType t) {
327 27 : return IN_SET(t,
328 : WRITE_FILE,
329 : IGNORE_PATH,
330 : IGNORE_DIRECTORY_PATH,
331 : REMOVE_PATH,
332 : RECURSIVE_REMOVE_PATH,
333 : EMPTY_DIRECTORY,
334 : ADJUST_MODE,
335 : RELABEL_PATH,
336 : RECURSIVE_RELABEL_PATH,
337 : SET_XATTR,
338 : RECURSIVE_SET_XATTR,
339 : SET_ACL,
340 : RECURSIVE_SET_ACL,
341 : SET_ATTRIBUTE,
342 : RECURSIVE_SET_ATTRIBUTE);
343 : }
344 :
345 0 : static bool takes_ownership(ItemType t) {
346 0 : return IN_SET(t,
347 : CREATE_FILE,
348 : TRUNCATE_FILE,
349 : CREATE_DIRECTORY,
350 : EMPTY_DIRECTORY,
351 : TRUNCATE_DIRECTORY,
352 : CREATE_SUBVOLUME,
353 : CREATE_SUBVOLUME_INHERIT_QUOTA,
354 : CREATE_SUBVOLUME_NEW_QUOTA,
355 : CREATE_FIFO,
356 : CREATE_SYMLINK,
357 : CREATE_CHAR_DEVICE,
358 : CREATE_BLOCK_DEVICE,
359 : COPY_FILES,
360 : WRITE_FILE,
361 : IGNORE_PATH,
362 : IGNORE_DIRECTORY_PATH,
363 : REMOVE_PATH,
364 : RECURSIVE_REMOVE_PATH);
365 : }
366 :
367 0 : static struct Item* find_glob(OrderedHashmap *h, const char *match) {
368 : ItemArray *j;
369 : Iterator i;
370 :
371 0 : ORDERED_HASHMAP_FOREACH(j, h, i) {
372 : size_t n;
373 :
374 0 : for (n = 0; n < j->n_items; n++) {
375 0 : Item *item = j->items + n;
376 :
377 0 : if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
378 0 : return item;
379 : }
380 : }
381 :
382 0 : return NULL;
383 : }
384 :
385 0 : static int load_unix_sockets(void) {
386 0 : _cleanup_set_free_free_ Set *sockets = NULL;
387 0 : _cleanup_fclose_ FILE *f = NULL;
388 : int r;
389 :
390 0 : if (unix_sockets)
391 0 : return 0;
392 :
393 : /* We maintain a cache of the sockets we found in /proc/net/unix to speed things up a little. */
394 :
395 0 : sockets = set_new(&path_hash_ops);
396 0 : if (!sockets)
397 0 : return log_oom();
398 :
399 0 : f = fopen("/proc/net/unix", "re");
400 0 : if (!f)
401 0 : return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno,
402 : "Failed to open /proc/net/unix, ignoring: %m");
403 :
404 : /* Skip header */
405 0 : r = read_line(f, LONG_LINE_MAX, NULL);
406 0 : if (r < 0)
407 0 : return log_warning_errno(r, "Failed to skip /proc/net/unix header line: %m");
408 0 : if (r == 0)
409 0 : return log_warning_errno(SYNTHETIC_ERRNO(EIO), "Premature end of file reading /proc/net/unix.");
410 :
411 0 : for (;;) {
412 0 : _cleanup_free_ char *line = NULL, *s = NULL;
413 : char *p;
414 :
415 0 : r = read_line(f, LONG_LINE_MAX, &line);
416 0 : if (r < 0)
417 0 : return log_warning_errno(r, "Failed to read /proc/net/unix line, ignoring: %m");
418 0 : if (r == 0) /* EOF */
419 0 : break;
420 :
421 0 : p = strchr(line, ':');
422 0 : if (!p)
423 0 : continue;
424 :
425 0 : if (strlen(p) < 37)
426 0 : continue;
427 :
428 0 : p += 37;
429 0 : p += strspn(p, WHITESPACE);
430 0 : p += strcspn(p, WHITESPACE); /* skip one more word */
431 0 : p += strspn(p, WHITESPACE);
432 :
433 0 : if (*p != '/')
434 0 : continue;
435 :
436 0 : s = strdup(p);
437 0 : if (!s)
438 0 : return log_oom();
439 :
440 0 : path_simplify(s, false);
441 :
442 0 : r = set_consume(sockets, s);
443 0 : if (r == -EEXIST)
444 0 : continue;
445 0 : if (r < 0)
446 0 : return log_warning_errno(r, "Failed to add AF_UNIX socket to set, ignoring: %m");
447 :
448 0 : TAKE_PTR(s);
449 : }
450 :
451 0 : unix_sockets = TAKE_PTR(sockets);
452 0 : return 1;
453 : }
454 :
455 0 : static bool unix_socket_alive(const char *fn) {
456 0 : assert(fn);
457 :
458 0 : if (load_unix_sockets() < 0)
459 0 : return true; /* We don't know, so assume yes */
460 :
461 0 : return !!set_get(unix_sockets, (char*) fn);
462 : }
463 :
464 0 : static DIR* xopendirat_nomod(int dirfd, const char *path) {
465 : DIR *dir;
466 :
467 0 : dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME);
468 0 : if (dir)
469 0 : return dir;
470 :
471 0 : log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
472 0 : if (errno != EPERM)
473 0 : return NULL;
474 :
475 0 : dir = xopendirat(dirfd, path, O_NOFOLLOW);
476 0 : if (!dir)
477 0 : log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
478 :
479 0 : return dir;
480 : }
481 :
482 0 : static DIR* opendir_nomod(const char *path) {
483 0 : return xopendirat_nomod(AT_FDCWD, path);
484 : }
485 :
486 0 : static int dir_cleanup(
487 : Item *i,
488 : const char *p,
489 : DIR *d,
490 : const struct stat *ds,
491 : usec_t cutoff,
492 : dev_t rootdev,
493 : bool mountpoint,
494 : int maxdepth,
495 : bool keep_this_level) {
496 :
497 : struct dirent *dent;
498 0 : bool deleted = false;
499 0 : int r = 0;
500 :
501 0 : FOREACH_DIRENT_ALL(dent, d, break) {
502 : struct stat s;
503 : usec_t age;
504 0 : _cleanup_free_ char *sub_path = NULL;
505 :
506 0 : if (dot_or_dot_dot(dent->d_name))
507 0 : continue;
508 :
509 0 : if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
510 0 : if (errno == ENOENT)
511 0 : continue;
512 :
513 : /* FUSE, NFS mounts, SELinux might return EACCES */
514 0 : r = log_full_errno(errno == EACCES ? LOG_DEBUG : LOG_ERR, errno,
515 : "stat(%s/%s) failed: %m", p, dent->d_name);
516 0 : continue;
517 : }
518 :
519 : /* Stay on the same filesystem */
520 0 : if (s.st_dev != rootdev) {
521 0 : log_debug("Ignoring \"%s/%s\": different filesystem.", p, dent->d_name);
522 0 : continue;
523 : }
524 :
525 : /* Try to detect bind mounts of the same filesystem instance; they
526 : * do not differ in device major/minors. This type of query is not
527 : * supported on all kernels or filesystem types though. */
528 0 : if (S_ISDIR(s.st_mode)) {
529 : int q;
530 :
531 0 : q = fd_is_mount_point(dirfd(d), dent->d_name, 0);
532 0 : if (q < 0)
533 0 : log_debug_errno(q, "Failed to determine whether \"%s/%s\" is a mount point, ignoring: %m", p, dent->d_name);
534 0 : else if (q > 0) {
535 0 : log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.", p, dent->d_name);
536 0 : continue;
537 : }
538 : }
539 :
540 0 : sub_path = path_join(p, dent->d_name);
541 0 : if (!sub_path) {
542 0 : r = log_oom();
543 0 : goto finish;
544 : }
545 :
546 : /* Is there an item configured for this path? */
547 0 : if (ordered_hashmap_get(items, sub_path)) {
548 0 : log_debug("Ignoring \"%s\": a separate entry exists.", sub_path);
549 0 : continue;
550 : }
551 :
552 0 : if (find_glob(globs, sub_path)) {
553 0 : log_debug("Ignoring \"%s\": a separate glob exists.", sub_path);
554 0 : continue;
555 : }
556 :
557 0 : if (S_ISDIR(s.st_mode)) {
558 0 : _cleanup_closedir_ DIR *sub_dir = NULL;
559 :
560 0 : if (mountpoint &&
561 0 : streq(dent->d_name, "lost+found") &&
562 0 : s.st_uid == 0) {
563 0 : log_debug("Ignoring directory \"%s\".", sub_path);
564 0 : continue;
565 : }
566 :
567 0 : if (maxdepth <= 0)
568 0 : log_warning("Reached max depth on \"%s\".", sub_path);
569 : else {
570 : int q;
571 :
572 0 : sub_dir = xopendirat_nomod(dirfd(d), dent->d_name);
573 0 : if (!sub_dir) {
574 0 : if (errno != ENOENT)
575 0 : r = log_warning_errno(errno, "Opening directory \"%s\" failed, ignoring: %m", sub_path);
576 :
577 0 : continue;
578 : }
579 :
580 0 : if (flock(dirfd(sub_dir), LOCK_EX|LOCK_NB) < 0) {
581 0 : log_debug_errno(errno, "Couldn't acquire shared BSD lock on directory \"%s\", skipping: %m", p);
582 0 : continue;
583 : }
584 :
585 0 : q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);
586 0 : if (q < 0)
587 0 : r = q;
588 : }
589 :
590 : /* Note: if you are wondering why we don't support the sticky bit for excluding
591 : * directories from cleaning like we do it for other file system objects: well, the
592 : * sticky bit already has a meaning for directories, so we don't want to overload
593 : * that. */
594 :
595 0 : if (keep_this_level) {
596 0 : log_debug("Keeping directory \"%s\".", sub_path);
597 0 : continue;
598 : }
599 :
600 : /* Ignore ctime, we change it when deleting */
601 0 : age = timespec_load(&s.st_mtim);
602 0 : if (age >= cutoff) {
603 : char a[FORMAT_TIMESTAMP_MAX];
604 : /* Follows spelling in stat(1). */
605 0 : log_debug("Directory \"%s\": modify time %s is too new.",
606 : sub_path,
607 : format_timestamp_us(a, sizeof(a), age));
608 0 : continue;
609 : }
610 :
611 0 : age = timespec_load(&s.st_atim);
612 0 : if (age >= cutoff) {
613 : char a[FORMAT_TIMESTAMP_MAX];
614 0 : log_debug("Directory \"%s\": access time %s is too new.",
615 : sub_path,
616 : format_timestamp_us(a, sizeof(a), age));
617 0 : continue;
618 : }
619 :
620 0 : log_debug("Removing directory \"%s\".", sub_path);
621 0 : if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0)
622 0 : if (!IN_SET(errno, ENOENT, ENOTEMPTY))
623 0 : r = log_warning_errno(errno, "Failed to remove directory \"%s\", ignoring: %m", sub_path);
624 :
625 : } else {
626 : /* Skip files for which the sticky bit is set. These are semantics we define, and are
627 : * unknown elsewhere. See XDG_RUNTIME_DIR specification for details. */
628 0 : if (s.st_mode & S_ISVTX) {
629 0 : log_debug("Skipping \"%s\": sticky bit set.", sub_path);
630 0 : continue;
631 : }
632 :
633 0 : if (mountpoint &&
634 0 : S_ISREG(s.st_mode) &&
635 0 : s.st_uid == 0 &&
636 0 : STR_IN_SET(dent->d_name,
637 : ".journal",
638 : "aquota.user",
639 : "aquota.group")) {
640 0 : log_debug("Skipping \"%s\".", sub_path);
641 0 : continue;
642 : }
643 :
644 : /* Ignore sockets that are listed in /proc/net/unix */
645 0 : if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) {
646 0 : log_debug("Skipping \"%s\": live socket.", sub_path);
647 0 : continue;
648 : }
649 :
650 : /* Ignore device nodes */
651 0 : if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) {
652 0 : log_debug("Skipping \"%s\": a device.", sub_path);
653 0 : continue;
654 : }
655 :
656 : /* Keep files on this level around if this is requested */
657 0 : if (keep_this_level) {
658 0 : log_debug("Keeping \"%s\".", sub_path);
659 0 : continue;
660 : }
661 :
662 0 : age = timespec_load(&s.st_mtim);
663 0 : if (age >= cutoff) {
664 : char a[FORMAT_TIMESTAMP_MAX];
665 : /* Follows spelling in stat(1). */
666 0 : log_debug("File \"%s\": modify time %s is too new.",
667 : sub_path,
668 : format_timestamp_us(a, sizeof(a), age));
669 0 : continue;
670 : }
671 :
672 0 : age = timespec_load(&s.st_atim);
673 0 : if (age >= cutoff) {
674 : char a[FORMAT_TIMESTAMP_MAX];
675 0 : log_debug("File \"%s\": access time %s is too new.",
676 : sub_path,
677 : format_timestamp_us(a, sizeof(a), age));
678 0 : continue;
679 : }
680 :
681 0 : age = timespec_load(&s.st_ctim);
682 0 : if (age >= cutoff) {
683 : char a[FORMAT_TIMESTAMP_MAX];
684 0 : log_debug("File \"%s\": change time %s is too new.",
685 : sub_path,
686 : format_timestamp_us(a, sizeof(a), age));
687 0 : continue;
688 : }
689 :
690 0 : log_debug("Removing \"%s\".", sub_path);
691 0 : if (unlinkat(dirfd(d), dent->d_name, 0) < 0)
692 0 : if (errno != ENOENT)
693 0 : r = log_warning_errno(errno, "Failed to remove \"%s\", ignoring: %m", sub_path);
694 :
695 0 : deleted = true;
696 : }
697 : }
698 :
699 0 : finish:
700 0 : if (deleted) {
701 : char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX];
702 : usec_t age1, age2;
703 :
704 0 : age1 = timespec_load(&ds->st_atim);
705 0 : age2 = timespec_load(&ds->st_mtim);
706 :
707 0 : log_debug("Restoring access and modification time on \"%s\": %s, %s",
708 : p,
709 : format_timestamp_us(a, sizeof(a), age1),
710 : format_timestamp_us(b, sizeof(b), age2));
711 :
712 : /* Restore original directory timestamps */
713 0 : if (futimens(dirfd(d), (struct timespec[]) {
714 : ds->st_atim,
715 : ds->st_mtim }) < 0)
716 0 : log_warning_errno(errno, "Failed to revert timestamps of '%s', ignoring: %m", p);
717 : }
718 :
719 0 : return r;
720 : }
721 :
722 0 : static bool dangerous_hardlinks(void) {
723 0 : _cleanup_free_ char *value = NULL;
724 : static int cached = -1;
725 : int r;
726 :
727 : /* Check whether the fs.protected_hardlinks sysctl is on. If we can't determine it we assume its off, as that's
728 : * what the upstream default is. */
729 :
730 0 : if (cached >= 0)
731 0 : return cached;
732 :
733 0 : r = read_one_line_file("/proc/sys/fs/protected_hardlinks", &value);
734 0 : if (r < 0) {
735 0 : log_debug_errno(r, "Failed to read fs.protected_hardlinks sysctl: %m");
736 0 : return true;
737 : }
738 :
739 0 : r = parse_boolean(value);
740 0 : if (r < 0) {
741 0 : log_debug_errno(r, "Failed to parse fs.protected_hardlinks sysctl: %m");
742 0 : return true;
743 : }
744 :
745 0 : cached = r == 0;
746 0 : return cached;
747 : }
748 :
749 0 : static bool hardlink_vulnerable(const struct stat *st) {
750 0 : assert(st);
751 :
752 0 : return !S_ISDIR(st->st_mode) && st->st_nlink > 1 && dangerous_hardlinks();
753 : }
754 :
755 0 : static mode_t process_mask_perms(mode_t mode, mode_t current) {
756 :
757 0 : if ((current & 0111) == 0)
758 0 : mode &= ~0111;
759 0 : if ((current & 0222) == 0)
760 0 : mode &= ~0222;
761 0 : if ((current & 0444) == 0)
762 0 : mode &= ~0444;
763 0 : if (!S_ISDIR(current))
764 0 : mode &= ~07000; /* remove sticky/sgid/suid bit, unless directory */
765 :
766 0 : return mode;
767 : }
768 :
769 27 : static int fd_set_perms(Item *i, int fd, const char *path, const struct stat *st) {
770 : struct stat stbuf;
771 : mode_t new_mode;
772 : bool do_chown;
773 :
774 27 : assert(i);
775 27 : assert(fd);
776 27 : assert(path);
777 :
778 27 : if (!i->mode_set && !i->uid_set && !i->gid_set)
779 27 : goto shortcut;
780 :
781 0 : if (!st) {
782 0 : if (fstat(fd, &stbuf) < 0)
783 0 : return log_error_errno(errno, "fstat(%s) failed: %m", path);
784 0 : st = &stbuf;
785 : }
786 :
787 0 : if (hardlink_vulnerable(st))
788 0 : return log_error_errno(SYNTHETIC_ERRNO(EPERM),
789 : "Refusing to set permissions on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.",
790 : path);
791 :
792 : /* Do we need a chown()? */
793 0 : do_chown =
794 0 : (i->uid_set && i->uid != st->st_uid) ||
795 0 : (i->gid_set && i->gid != st->st_gid);
796 :
797 : /* Calculate the mode to apply */
798 0 : new_mode = i->mode_set ? (i->mask_perms ?
799 0 : process_mask_perms(i->mode, st->st_mode) :
800 0 : i->mode) :
801 0 : (st->st_mode & 07777);
802 :
803 0 : if (i->mode_set && do_chown) {
804 : /* Before we issue the chmod() let's reduce the access mode to the common bits of the old and
805 : * the new mode. That way there's no time window where the file exists under the old owner
806 : * with more than the old access modes — and not under the new owner with more than the new
807 : * access modes either. */
808 :
809 0 : if (S_ISLNK(st->st_mode))
810 0 : log_debug("Skipping temporary mode fix for symlink %s.", path);
811 : else {
812 0 : mode_t m = new_mode & st->st_mode; /* Mask new mode by old mode */
813 :
814 0 : if (((m ^ st->st_mode) & 07777) == 0)
815 0 : log_debug("\"%s\" matches temporary mode %o already.", path, m);
816 : else {
817 0 : log_debug("Temporarily changing \"%s\" to mode %o.", path, m);
818 0 : if (fchmod_opath(fd, m) < 0)
819 0 : return log_error_errno(errno, "fchmod() of %s failed: %m", path);
820 : }
821 : }
822 : }
823 :
824 0 : if (do_chown) {
825 0 : log_debug("Changing \"%s\" to owner "UID_FMT":"GID_FMT,
826 : path,
827 : i->uid_set ? i->uid : UID_INVALID,
828 : i->gid_set ? i->gid : GID_INVALID);
829 :
830 0 : if (fchownat(fd,
831 : "",
832 0 : i->uid_set ? i->uid : UID_INVALID,
833 0 : i->gid_set ? i->gid : GID_INVALID,
834 : AT_EMPTY_PATH) < 0)
835 0 : return log_error_errno(errno, "fchownat() of %s failed: %m", path);
836 : }
837 :
838 : /* Now, apply the final mode. We do this in two cases: when the user set a mode explicitly, or after a
839 : * chown(), since chown()'s mangle the access mode in regards to sgid/suid in some conditions. */
840 0 : if (i->mode_set || do_chown) {
841 0 : if (S_ISLNK(st->st_mode))
842 0 : log_debug("Skipping mode fix for symlink %s.", path);
843 : else {
844 : /* Check if the chmod() is unnecessary. Note that if we did a chown() before we always
845 : * chmod() here again, since it might have mangled the bits. */
846 0 : if (!do_chown && ((new_mode ^ st->st_mode) & 07777) == 0)
847 0 : log_debug("\"%s\" matches mode %o already.", path, new_mode);
848 : else {
849 0 : log_debug("Changing \"%s\" to mode %o.", path, new_mode);
850 0 : if (fchmod_opath(fd, new_mode) < 0)
851 0 : return log_error_errno(errno, "fchmod() of %s failed: %m", path);
852 : }
853 : }
854 : }
855 :
856 0 : shortcut:
857 27 : return label_fix(path, 0);
858 : }
859 :
860 27 : static int path_open_parent_safe(const char *path) {
861 27 : _cleanup_free_ char *dn = NULL;
862 : int fd;
863 :
864 27 : if (path_equal(path, "/") || !path_is_normalized(path))
865 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
866 : "Failed to open parent of '%s': invalid path.",
867 : path);
868 :
869 27 : dn = dirname_malloc(path);
870 27 : if (!dn)
871 0 : return log_oom();
872 :
873 27 : fd = chase_symlinks(dn, arg_root, CHASE_OPEN|CHASE_SAFE|CHASE_WARN, NULL);
874 27 : if (fd < 0 && fd != -ENOLINK)
875 0 : return log_error_errno(fd, "Failed to validate path %s: %m", path);
876 :
877 27 : return fd;
878 : }
879 :
880 0 : static int path_open_safe(const char *path) {
881 : int fd;
882 :
883 : /* path_open_safe() returns a file descriptor opened with O_PATH after
884 : * verifying that the path doesn't contain unsafe transitions, except
885 : * for its final component as the function does not follow symlink. */
886 :
887 0 : assert(path);
888 :
889 0 : if (!path_is_normalized(path))
890 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
891 : "Failed to open invalid path '%s'.",
892 : path);
893 :
894 0 : fd = chase_symlinks(path, arg_root, CHASE_OPEN|CHASE_SAFE|CHASE_WARN|CHASE_NOFOLLOW, NULL);
895 0 : if (fd < 0 && fd != -ENOLINK)
896 0 : return log_error_errno(fd, "Failed to validate path %s: %m", path);
897 :
898 0 : return fd;
899 : }
900 :
901 0 : static int path_set_perms(Item *i, const char *path) {
902 0 : _cleanup_close_ int fd = -1;
903 :
904 0 : assert(i);
905 0 : assert(path);
906 :
907 0 : fd = path_open_safe(path);
908 0 : if (fd < 0)
909 0 : return fd;
910 :
911 0 : return fd_set_perms(i, fd, path, NULL);
912 : }
913 :
914 0 : static int parse_xattrs_from_arg(Item *i) {
915 : const char *p;
916 : int r;
917 :
918 0 : assert(i);
919 0 : assert(i->argument);
920 :
921 0 : p = i->argument;
922 :
923 0 : for (;;) {
924 0 : _cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL;
925 :
926 0 : r = extract_first_word(&p, &xattr, NULL, EXTRACT_UNQUOTE|EXTRACT_CUNESCAPE);
927 0 : if (r < 0)
928 0 : log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p);
929 0 : if (r <= 0)
930 0 : break;
931 :
932 0 : r = split_pair(xattr, "=", &name, &value);
933 0 : if (r < 0) {
934 0 : log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr);
935 0 : continue;
936 : }
937 :
938 0 : if (isempty(name) || isempty(value)) {
939 0 : log_warning("Malformed extended attribute found, ignoring: %s", xattr);
940 0 : continue;
941 : }
942 :
943 0 : if (strv_push_pair(&i->xattrs, name, value) < 0)
944 0 : return log_oom();
945 :
946 0 : name = value = NULL;
947 : }
948 :
949 0 : return 0;
950 : }
951 :
952 0 : static int fd_set_xattrs(Item *i, int fd, const char *path, const struct stat *st) {
953 : char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
954 : char **name, **value;
955 :
956 0 : assert(i);
957 0 : assert(fd);
958 0 : assert(path);
959 :
960 0 : xsprintf(procfs_path, "/proc/self/fd/%i", fd);
961 :
962 0 : STRV_FOREACH_PAIR(name, value, i->xattrs) {
963 0 : log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path);
964 0 : if (setxattr(procfs_path, *name, *value, strlen(*value), 0) < 0)
965 0 : return log_error_errno(errno, "Setting extended attribute %s=%s on %s failed: %m",
966 : *name, *value, path);
967 : }
968 0 : return 0;
969 : }
970 :
971 0 : static int path_set_xattrs(Item *i, const char *path) {
972 0 : _cleanup_close_ int fd = -1;
973 :
974 0 : assert(i);
975 0 : assert(path);
976 :
977 0 : fd = path_open_safe(path);
978 0 : if (fd < 0)
979 0 : return fd;
980 :
981 0 : return fd_set_xattrs(i, fd, path, NULL);
982 : }
983 :
984 0 : static int parse_acls_from_arg(Item *item) {
985 : #if HAVE_ACL
986 : int r;
987 :
988 0 : assert(item);
989 :
990 : /* If force (= modify) is set, we will not modify the acl
991 : * afterwards, so the mask can be added now if necessary. */
992 :
993 0 : r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force);
994 0 : if (r < 0)
995 0 : log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument);
996 : #else
997 : log_warning_errno(SYNTHETIC_ERRNO(ENOSYS), "ACLs are not supported. Ignoring");
998 : #endif
999 :
1000 0 : return 0;
1001 : }
1002 :
1003 : #if HAVE_ACL
1004 0 : static int path_set_acl(const char *path, const char *pretty, acl_type_t type, acl_t acl, bool modify) {
1005 0 : _cleanup_(acl_free_charpp) char *t = NULL;
1006 0 : _cleanup_(acl_freep) acl_t dup = NULL;
1007 : int r;
1008 :
1009 : /* Returns 0 for success, positive error if already warned,
1010 : * negative error otherwise. */
1011 :
1012 0 : if (modify) {
1013 0 : r = acls_for_file(path, type, acl, &dup);
1014 0 : if (r < 0)
1015 0 : return r;
1016 :
1017 0 : r = calc_acl_mask_if_needed(&dup);
1018 0 : if (r < 0)
1019 0 : return r;
1020 : } else {
1021 0 : dup = acl_dup(acl);
1022 0 : if (!dup)
1023 0 : return -errno;
1024 :
1025 : /* the mask was already added earlier if needed */
1026 : }
1027 :
1028 0 : r = add_base_acls_if_needed(&dup, path);
1029 0 : if (r < 0)
1030 0 : return r;
1031 :
1032 0 : t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);
1033 0 : log_debug("Setting %s ACL %s on %s.",
1034 : type == ACL_TYPE_ACCESS ? "access" : "default",
1035 : strna(t), pretty);
1036 :
1037 0 : r = acl_set_file(path, type, dup);
1038 0 : if (r < 0)
1039 : /* Return positive to indicate we already warned */
1040 0 : return -log_error_errno(errno,
1041 : "Setting %s ACL \"%s\" on %s failed: %m",
1042 : type == ACL_TYPE_ACCESS ? "access" : "default",
1043 : strna(t), pretty);
1044 :
1045 0 : return 0;
1046 : }
1047 : #endif
1048 :
1049 0 : static int fd_set_acls(Item *item, int fd, const char *path, const struct stat *st) {
1050 0 : int r = 0;
1051 : #if HAVE_ACL
1052 : char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
1053 : struct stat stbuf;
1054 :
1055 0 : assert(item);
1056 0 : assert(fd);
1057 0 : assert(path);
1058 :
1059 0 : if (!st) {
1060 0 : if (fstat(fd, &stbuf) < 0)
1061 0 : return log_error_errno(errno, "fstat(%s) failed: %m", path);
1062 0 : st = &stbuf;
1063 : }
1064 :
1065 0 : if (hardlink_vulnerable(st))
1066 0 : return log_error_errno(SYNTHETIC_ERRNO(EPERM),
1067 : "Refusing to set ACLs on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.",
1068 : path);
1069 :
1070 0 : if (S_ISLNK(st->st_mode)) {
1071 0 : log_debug("Skipping ACL fix for symlink %s.", path);
1072 0 : return 0;
1073 : }
1074 :
1075 0 : xsprintf(procfs_path, "/proc/self/fd/%i", fd);
1076 :
1077 0 : if (item->acl_access)
1078 0 : r = path_set_acl(procfs_path, path, ACL_TYPE_ACCESS, item->acl_access, item->force);
1079 :
1080 : /* set only default acls to folders */
1081 0 : if (r == 0 && item->acl_default && S_ISDIR(st->st_mode))
1082 0 : r = path_set_acl(procfs_path, path, ACL_TYPE_DEFAULT, item->acl_default, item->force);
1083 :
1084 0 : if (r > 0)
1085 0 : return -r; /* already warned */
1086 0 : if (r == -EOPNOTSUPP) {
1087 0 : log_debug_errno(r, "ACLs not supported by file system at %s", path);
1088 0 : return 0;
1089 : }
1090 0 : if (r < 0)
1091 0 : return log_error_errno(r, "ACL operation on \"%s\" failed: %m", path);
1092 : #endif
1093 0 : return r;
1094 : }
1095 :
1096 0 : static int path_set_acls(Item *item, const char *path) {
1097 0 : int r = 0;
1098 : #if HAVE_ACL
1099 0 : _cleanup_close_ int fd = -1;
1100 :
1101 0 : assert(item);
1102 0 : assert(path);
1103 :
1104 0 : fd = path_open_safe(path);
1105 0 : if (fd < 0)
1106 0 : return fd;
1107 :
1108 0 : r = fd_set_acls(item, fd, path, NULL);
1109 : #endif
1110 0 : return r;
1111 : }
1112 :
1113 0 : static int parse_attribute_from_arg(Item *item) {
1114 :
1115 : static const struct {
1116 : char character;
1117 : unsigned value;
1118 : } attributes[] = {
1119 : { 'A', FS_NOATIME_FL }, /* do not update atime */
1120 : { 'S', FS_SYNC_FL }, /* Synchronous updates */
1121 : { 'D', FS_DIRSYNC_FL }, /* dirsync behaviour (directories only) */
1122 : { 'a', FS_APPEND_FL }, /* writes to file may only append */
1123 : { 'c', FS_COMPR_FL }, /* Compress file */
1124 : { 'd', FS_NODUMP_FL }, /* do not dump file */
1125 : { 'e', FS_EXTENT_FL }, /* Extents */
1126 : { 'i', FS_IMMUTABLE_FL }, /* Immutable file */
1127 : { 'j', FS_JOURNAL_DATA_FL }, /* Reserved for ext3 */
1128 : { 's', FS_SECRM_FL }, /* Secure deletion */
1129 : { 'u', FS_UNRM_FL }, /* Undelete */
1130 : { 't', FS_NOTAIL_FL }, /* file tail should not be merged */
1131 : { 'T', FS_TOPDIR_FL }, /* Top of directory hierarchies */
1132 : { 'C', FS_NOCOW_FL }, /* Do not cow file */
1133 : { 'P', FS_PROJINHERIT_FL }, /* Inherit the quota project ID */
1134 : };
1135 :
1136 : enum {
1137 : MODE_ADD,
1138 : MODE_DEL,
1139 : MODE_SET
1140 0 : } mode = MODE_ADD;
1141 :
1142 0 : unsigned value = 0, mask = 0;
1143 : const char *p;
1144 :
1145 0 : assert(item);
1146 :
1147 0 : p = item->argument;
1148 0 : if (p) {
1149 0 : if (*p == '+') {
1150 0 : mode = MODE_ADD;
1151 0 : p++;
1152 0 : } else if (*p == '-') {
1153 0 : mode = MODE_DEL;
1154 0 : p++;
1155 0 : } else if (*p == '=') {
1156 0 : mode = MODE_SET;
1157 0 : p++;
1158 : }
1159 : }
1160 :
1161 0 : if (isempty(p) && mode != MODE_SET)
1162 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1163 : "Setting file attribute on '%s' needs an attribute specification.",
1164 : item->path);
1165 :
1166 0 : for (; p && *p ; p++) {
1167 : unsigned i, v;
1168 :
1169 0 : for (i = 0; i < ELEMENTSOF(attributes); i++)
1170 0 : if (*p == attributes[i].character)
1171 0 : break;
1172 :
1173 0 : if (i >= ELEMENTSOF(attributes))
1174 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1175 : "Unknown file attribute '%c' on '%s'.",
1176 : *p, item->path);
1177 :
1178 0 : v = attributes[i].value;
1179 :
1180 0 : SET_FLAG(value, v, IN_SET(mode, MODE_ADD, MODE_SET));
1181 :
1182 0 : mask |= v;
1183 : }
1184 :
1185 0 : if (mode == MODE_SET)
1186 0 : mask |= CHATTR_ALL_FL;
1187 :
1188 0 : assert(mask != 0);
1189 :
1190 0 : item->attribute_mask = mask;
1191 0 : item->attribute_value = value;
1192 0 : item->attribute_set = true;
1193 :
1194 0 : return 0;
1195 : }
1196 :
1197 0 : static int fd_set_attribute(Item *item, int fd, const char *path, const struct stat *st) {
1198 0 : _cleanup_close_ int procfs_fd = -1;
1199 : struct stat stbuf;
1200 : unsigned f;
1201 : int r;
1202 :
1203 0 : assert(item);
1204 0 : assert(fd);
1205 0 : assert(path);
1206 :
1207 0 : if (!item->attribute_set || item->attribute_mask == 0)
1208 0 : return 0;
1209 :
1210 0 : if (!st) {
1211 0 : if (fstat(fd, &stbuf) < 0)
1212 0 : return log_error_errno(errno, "fstat(%s) failed: %m", path);
1213 0 : st = &stbuf;
1214 : }
1215 :
1216 : /* Issuing the file attribute ioctls on device nodes is not
1217 : * safe, as that will be delivered to the drivers, not the
1218 : * file system containing the device node. */
1219 0 : if (!S_ISREG(st->st_mode) && !S_ISDIR(st->st_mode))
1220 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1221 : "Setting file flags is only supported on regular files and directories, cannot set on '%s'.",
1222 : path);
1223 :
1224 0 : f = item->attribute_value & item->attribute_mask;
1225 :
1226 : /* Mask away directory-specific flags */
1227 0 : if (!S_ISDIR(st->st_mode))
1228 0 : f &= ~FS_DIRSYNC_FL;
1229 :
1230 0 : procfs_fd = fd_reopen(fd, O_RDONLY|O_CLOEXEC|O_NOATIME);
1231 0 : if (procfs_fd < 0)
1232 0 : return log_error_errno(procfs_fd, "Failed to re-open '%s': %m", path);
1233 :
1234 0 : r = chattr_fd(procfs_fd, f, item->attribute_mask, NULL);
1235 0 : if (r < 0)
1236 0 : log_full_errno(IN_SET(r, -ENOTTY, -EOPNOTSUPP) ? LOG_DEBUG : LOG_WARNING,
1237 : r,
1238 : "Cannot set file attribute for '%s', value=0x%08x, mask=0x%08x, ignoring: %m",
1239 : path, item->attribute_value, item->attribute_mask);
1240 :
1241 0 : return 0;
1242 : }
1243 :
1244 0 : static int path_set_attribute(Item *item, const char *path) {
1245 0 : _cleanup_close_ int fd = -1;
1246 :
1247 0 : if (!item->attribute_set || item->attribute_mask == 0)
1248 0 : return 0;
1249 :
1250 0 : fd = path_open_safe(path);
1251 0 : if (fd < 0)
1252 0 : return fd;
1253 :
1254 0 : return fd_set_attribute(item, fd, path, NULL);
1255 : }
1256 :
1257 0 : static int write_one_file(Item *i, const char *path) {
1258 0 : _cleanup_close_ int fd = -1, dir_fd = -1;
1259 : char *bn;
1260 : int r;
1261 :
1262 0 : assert(i);
1263 0 : assert(path);
1264 0 : assert(i->argument);
1265 0 : assert(i->type == WRITE_FILE);
1266 :
1267 : /* Validate the path and keep the fd on the directory for opening the
1268 : * file so we're sure that it can't be changed behind our back. */
1269 0 : dir_fd = path_open_parent_safe(path);
1270 0 : if (dir_fd < 0)
1271 0 : return dir_fd;
1272 :
1273 0 : bn = basename(path);
1274 :
1275 : /* Follows symlinks */
1276 0 : fd = openat(dir_fd, bn, O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
1277 0 : if (fd < 0) {
1278 0 : if (errno == ENOENT) {
1279 0 : log_debug_errno(errno, "Not writing missing file \"%s\": %m", path);
1280 0 : return 0;
1281 : }
1282 0 : return log_error_errno(errno, "Failed to open file \"%s\": %m", path);
1283 : }
1284 :
1285 : /* 'w' is allowed to write into any kind of files. */
1286 0 : log_debug("Writing to \"%s\".", path);
1287 :
1288 0 : r = loop_write(fd, i->argument, strlen(i->argument), false);
1289 0 : if (r < 0)
1290 0 : return log_error_errno(r, "Failed to write file \"%s\": %m", path);
1291 :
1292 0 : return fd_set_perms(i, fd, path, NULL);
1293 : }
1294 :
1295 27 : static int create_file(Item *i, const char *path) {
1296 27 : _cleanup_close_ int fd = -1, dir_fd = -1;
1297 27 : struct stat stbuf, *st = NULL;
1298 27 : int r = 0;
1299 : char *bn;
1300 :
1301 27 : assert(i);
1302 27 : assert(path);
1303 27 : assert(i->type == CREATE_FILE);
1304 :
1305 : /* 'f' operates on regular files exclusively. */
1306 :
1307 : /* Validate the path and keep the fd on the directory for opening the
1308 : * file so we're sure that it can't be changed behind our back. */
1309 27 : dir_fd = path_open_parent_safe(path);
1310 27 : if (dir_fd < 0)
1311 0 : return dir_fd;
1312 :
1313 27 : bn = basename(path);
1314 :
1315 54 : RUN_WITH_UMASK(0000) {
1316 27 : mac_selinux_create_file_prepare(path, S_IFREG);
1317 27 : fd = openat(dir_fd, bn, O_CREAT|O_EXCL|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
1318 27 : mac_selinux_create_file_clear();
1319 : }
1320 :
1321 27 : if (fd < 0) {
1322 : /* Even on a read-only filesystem, open(2) returns EEXIST if the
1323 : * file already exists. It returns EROFS only if it needs to
1324 : * create the file. */
1325 0 : if (errno != EEXIST)
1326 0 : return log_error_errno(errno, "Failed to create file %s: %m", path);
1327 :
1328 : /* Re-open the file. At that point it must exist since open(2)
1329 : * failed with EEXIST. We still need to check if the perms/mode
1330 : * need to be changed. For read-only filesystems, we let
1331 : * fd_set_perms() report the error if the perms need to be
1332 : * modified. */
1333 0 : fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
1334 0 : if (fd < 0)
1335 0 : return log_error_errno(errno, "Failed to re-open file %s: %m", path);
1336 :
1337 0 : if (fstat(fd, &stbuf) < 0)
1338 0 : return log_error_errno(errno, "stat(%s) failed: %m", path);
1339 :
1340 0 : if (!S_ISREG(stbuf.st_mode)) {
1341 0 : log_error("%s exists and is not a regular file.", path);
1342 0 : return -EEXIST;
1343 : }
1344 :
1345 0 : st = &stbuf;
1346 : } else {
1347 :
1348 27 : log_debug("\"%s\" has been created.", path);
1349 :
1350 27 : if (i->argument) {
1351 27 : log_debug("Writing to \"%s\".", path);
1352 :
1353 27 : r = loop_write(fd, i->argument, strlen(i->argument), false);
1354 27 : if (r < 0)
1355 0 : return log_error_errno(r, "Failed to write file \"%s\": %m", path);
1356 : }
1357 : }
1358 :
1359 27 : return fd_set_perms(i, fd, path, st);
1360 : }
1361 :
1362 0 : static int truncate_file(Item *i, const char *path) {
1363 0 : _cleanup_close_ int fd = -1, dir_fd = -1;
1364 0 : struct stat stbuf, *st = NULL;
1365 0 : bool erofs = false;
1366 0 : int r = 0;
1367 : char *bn;
1368 :
1369 0 : assert(i);
1370 0 : assert(path);
1371 0 : assert(i->type == TRUNCATE_FILE);
1372 :
1373 : /* We want to operate on regular file exclusively especially since
1374 : * O_TRUNC is unspecified if the file is neither a regular file nor a
1375 : * fifo nor a terminal device. Therefore we first open the file and make
1376 : * sure it's a regular one before truncating it. */
1377 :
1378 : /* Validate the path and keep the fd on the directory for opening the
1379 : * file so we're sure that it can't be changed behind our back. */
1380 0 : dir_fd = path_open_parent_safe(path);
1381 0 : if (dir_fd < 0)
1382 0 : return dir_fd;
1383 :
1384 0 : bn = basename(path);
1385 :
1386 0 : RUN_WITH_UMASK(0000) {
1387 0 : mac_selinux_create_file_prepare(path, S_IFREG);
1388 0 : fd = openat(dir_fd, bn, O_CREAT|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
1389 0 : mac_selinux_create_file_clear();
1390 : }
1391 :
1392 0 : if (fd < 0) {
1393 0 : if (errno != EROFS)
1394 0 : return log_error_errno(errno, "Failed to open/create file %s: %m", path);
1395 :
1396 : /* On a read-only filesystem, we don't want to fail if the
1397 : * target is already empty and the perms are set. So we still
1398 : * proceed with the sanity checks and let the remaining
1399 : * operations fail with EROFS if they try to modify the target
1400 : * file. */
1401 :
1402 0 : fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
1403 0 : if (fd < 0) {
1404 0 : if (errno == ENOENT) {
1405 0 : log_error("Cannot create file %s on a read-only file system.", path);
1406 0 : return -EROFS;
1407 : }
1408 :
1409 0 : return log_error_errno(errno, "Failed to re-open file %s: %m", path);
1410 : }
1411 :
1412 0 : erofs = true;
1413 : }
1414 :
1415 0 : if (fstat(fd, &stbuf) < 0)
1416 0 : return log_error_errno(errno, "stat(%s) failed: %m", path);
1417 :
1418 0 : if (!S_ISREG(stbuf.st_mode)) {
1419 0 : log_error("%s exists and is not a regular file.", path);
1420 0 : return -EEXIST;
1421 : }
1422 :
1423 0 : if (stbuf.st_size > 0) {
1424 0 : if (ftruncate(fd, 0) < 0) {
1425 0 : r = erofs ? -EROFS : -errno;
1426 0 : return log_error_errno(r, "Failed to truncate file %s: %m", path);
1427 : }
1428 : } else
1429 0 : st = &stbuf;
1430 :
1431 0 : log_debug("\"%s\" has been created.", path);
1432 :
1433 0 : if (i->argument) {
1434 0 : log_debug("Writing to \"%s\".", path);
1435 :
1436 0 : r = loop_write(fd, i->argument, strlen(i->argument), false);
1437 0 : if (r < 0) {
1438 0 : r = erofs ? -EROFS : r;
1439 0 : return log_error_errno(r, "Failed to write file %s: %m", path);
1440 : }
1441 : }
1442 :
1443 0 : return fd_set_perms(i, fd, path, st);
1444 : }
1445 :
1446 0 : static int copy_files(Item *i) {
1447 0 : _cleanup_close_ int dfd = -1, fd = -1;
1448 : char *bn;
1449 : int r;
1450 :
1451 0 : log_debug("Copying tree \"%s\" to \"%s\".", i->argument, i->path);
1452 :
1453 0 : bn = basename(i->path);
1454 :
1455 : /* Validate the path and use the returned directory fd for copying the
1456 : * target so we're sure that the path can't be changed behind our
1457 : * back. */
1458 0 : dfd = path_open_parent_safe(i->path);
1459 0 : if (dfd < 0)
1460 0 : return dfd;
1461 :
1462 0 : r = copy_tree_at(AT_FDCWD, i->argument,
1463 : dfd, bn,
1464 0 : i->uid_set ? i->uid : UID_INVALID,
1465 0 : i->gid_set ? i->gid : GID_INVALID,
1466 : COPY_REFLINK | COPY_MERGE_EMPTY);
1467 0 : if (r < 0) {
1468 : struct stat a, b;
1469 :
1470 : /* If the target already exists on read-only filesystems, trying
1471 : * to create the target will not fail with EEXIST but with
1472 : * EROFS. */
1473 0 : if (r == -EROFS && faccessat(dfd, bn, F_OK, AT_SYMLINK_NOFOLLOW) == 0)
1474 0 : r = -EEXIST;
1475 :
1476 0 : if (r != -EEXIST)
1477 0 : return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
1478 :
1479 0 : if (stat(i->argument, &a) < 0)
1480 0 : return log_error_errno(errno, "stat(%s) failed: %m", i->argument);
1481 :
1482 0 : if (fstatat(dfd, bn, &b, AT_SYMLINK_NOFOLLOW) < 0)
1483 0 : return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1484 :
1485 0 : if ((a.st_mode ^ b.st_mode) & S_IFMT) {
1486 0 : log_debug("Can't copy to %s, file exists already and is of different type", i->path);
1487 0 : return 0;
1488 : }
1489 : }
1490 :
1491 0 : fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1492 0 : if (fd < 0)
1493 0 : return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
1494 :
1495 0 : return fd_set_perms(i, fd, i->path, NULL);
1496 : }
1497 :
1498 : typedef enum {
1499 : CREATION_NORMAL,
1500 : CREATION_EXISTING,
1501 : CREATION_FORCE,
1502 : _CREATION_MODE_MAX,
1503 : _CREATION_MODE_INVALID = -1
1504 : } CreationMode;
1505 :
1506 : static const char *const creation_mode_verb_table[_CREATION_MODE_MAX] = {
1507 : [CREATION_NORMAL] = "Created",
1508 : [CREATION_EXISTING] = "Found existing",
1509 : [CREATION_FORCE] = "Created replacement",
1510 : };
1511 :
1512 0 : DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);
1513 :
1514 0 : static int create_directory_or_subvolume(const char *path, mode_t mode, bool subvol, CreationMode *creation) {
1515 0 : _cleanup_close_ int pfd = -1;
1516 : CreationMode c;
1517 : int r;
1518 :
1519 0 : assert(path);
1520 :
1521 0 : if (!creation)
1522 0 : creation = &c;
1523 :
1524 0 : pfd = path_open_parent_safe(path);
1525 0 : if (pfd < 0)
1526 0 : return pfd;
1527 :
1528 0 : if (subvol) {
1529 0 : if (btrfs_is_subvol(empty_to_root(arg_root)) <= 0)
1530 :
1531 : /* Don't create a subvolume unless the root directory is
1532 : * one, too. We do this under the assumption that if the
1533 : * root directory is just a plain directory (i.e. very
1534 : * light-weight), we shouldn't try to split it up into
1535 : * subvolumes (i.e. more heavy-weight). Thus, chroot()
1536 : * environments and suchlike will get a full brtfs
1537 : * subvolume set up below their tree only if they
1538 : * specifically set up a btrfs subvolume for the root
1539 : * dir too. */
1540 :
1541 0 : subvol = false;
1542 : else {
1543 0 : RUN_WITH_UMASK((~mode) & 0777)
1544 0 : r = btrfs_subvol_make_fd(pfd, basename(path));
1545 : }
1546 : } else
1547 0 : r = 0;
1548 :
1549 0 : if (!subvol || r == -ENOTTY)
1550 0 : RUN_WITH_UMASK(0000)
1551 0 : r = mkdirat_label(pfd, basename(path), mode);
1552 :
1553 0 : if (r < 0) {
1554 : int k;
1555 :
1556 0 : if (!IN_SET(r, -EEXIST, -EROFS))
1557 0 : return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", path);
1558 :
1559 0 : k = is_dir_fd(pfd);
1560 0 : if (k == -ENOENT && r == -EROFS)
1561 0 : return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", path);
1562 0 : if (k < 0)
1563 0 : return log_error_errno(k, "Failed to check if %s exists: %m", path);
1564 0 : if (!k) {
1565 0 : log_warning("\"%s\" already exists and is not a directory.", path);
1566 0 : return -EEXIST;
1567 : }
1568 :
1569 0 : *creation = CREATION_EXISTING;
1570 : } else
1571 0 : *creation = CREATION_NORMAL;
1572 :
1573 0 : log_debug("%s directory \"%s\".", creation_mode_verb_to_string(*creation), path);
1574 :
1575 0 : r = openat(pfd, basename(path), O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
1576 0 : if (r < 0)
1577 0 : return log_error_errno(errno, "Failed to open directory '%s': %m", basename(path));
1578 :
1579 0 : return r;
1580 : }
1581 :
1582 0 : static int create_directory(Item *i, const char *path) {
1583 0 : _cleanup_close_ int fd = -1;
1584 :
1585 0 : assert(i);
1586 0 : assert(IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY));
1587 :
1588 0 : fd = create_directory_or_subvolume(path, i->mode, false, NULL);
1589 0 : if (fd == -EEXIST)
1590 0 : return 0;
1591 0 : if (fd < 0)
1592 0 : return fd;
1593 :
1594 0 : return fd_set_perms(i, fd, path, NULL);
1595 : }
1596 :
1597 0 : static int create_subvolume(Item *i, const char *path) {
1598 0 : _cleanup_close_ int fd = -1;
1599 : CreationMode creation;
1600 0 : int r, q = 0;
1601 :
1602 0 : assert(i);
1603 0 : assert(IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA));
1604 :
1605 0 : fd = create_directory_or_subvolume(path, i->mode, true, &creation);
1606 0 : if (fd == -EEXIST)
1607 0 : return 0;
1608 0 : if (fd < 0)
1609 0 : return fd;
1610 :
1611 0 : if (creation == CREATION_NORMAL &&
1612 0 : IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
1613 0 : r = btrfs_subvol_auto_qgroup_fd(fd, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
1614 0 : if (r == -ENOTTY)
1615 0 : log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
1616 0 : else if (r == -EROFS)
1617 0 : log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
1618 0 : else if (r == -ENOPROTOOPT)
1619 0 : log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
1620 0 : else if (r < 0)
1621 0 : q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
1622 0 : else if (r > 0)
1623 0 : log_debug("Adjusted quota for subvolume \"%s\".", i->path);
1624 0 : else if (r == 0)
1625 0 : log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
1626 : }
1627 :
1628 0 : r = fd_set_perms(i, fd, path, NULL);
1629 0 : if (q < 0) /* prefer the quota change error from above */
1630 0 : return q;
1631 :
1632 0 : return r;
1633 : }
1634 :
1635 0 : static int empty_directory(Item *i, const char *path) {
1636 : int r;
1637 :
1638 0 : assert(i);
1639 0 : assert(i->type == EMPTY_DIRECTORY);
1640 :
1641 0 : r = is_dir(path, false);
1642 0 : if (r == -ENOENT) {
1643 : /* Option "e" operates only on existing objects. Do not
1644 : * print errors about non-existent files or directories */
1645 0 : log_debug("Skipping missing directory: %s", path);
1646 0 : return 0;
1647 : }
1648 0 : if (r < 0)
1649 0 : return log_error_errno(r, "is_dir() failed on path %s: %m", path);
1650 0 : if (r == 0)
1651 0 : return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
1652 : "'%s' already exists and is not a directory.",
1653 : path);
1654 :
1655 0 : return path_set_perms(i, path);
1656 : }
1657 :
1658 0 : static int create_device(Item *i, mode_t file_type) {
1659 0 : _cleanup_close_ int dfd = -1, fd = -1;
1660 : CreationMode creation;
1661 : char *bn;
1662 : int r;
1663 :
1664 0 : assert(i);
1665 0 : assert(IN_SET(file_type, S_IFBLK, S_IFCHR));
1666 :
1667 0 : bn = basename(i->path);
1668 :
1669 : /* Validate the path and use the returned directory fd for copying the
1670 : * target so we're sure that the path can't be changed behind our
1671 : * back. */
1672 0 : dfd = path_open_parent_safe(i->path);
1673 0 : if (dfd < 0)
1674 0 : return dfd;
1675 :
1676 0 : RUN_WITH_UMASK(0000) {
1677 0 : mac_selinux_create_file_prepare(i->path, file_type);
1678 0 : r = mknodat(dfd, bn, i->mode | file_type, i->major_minor);
1679 0 : mac_selinux_create_file_clear();
1680 : }
1681 :
1682 0 : if (r < 0) {
1683 : struct stat st;
1684 :
1685 0 : if (errno == EPERM) {
1686 0 : log_debug("We lack permissions, possibly because of cgroup configuration; "
1687 : "skipping creation of device node %s.", i->path);
1688 0 : return 0;
1689 : }
1690 :
1691 0 : if (errno != EEXIST)
1692 0 : return log_error_errno(errno, "Failed to create device node %s: %m", i->path);
1693 :
1694 0 : if (fstatat(dfd, bn, &st, 0) < 0)
1695 0 : return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1696 :
1697 0 : if ((st.st_mode & S_IFMT) != file_type) {
1698 :
1699 0 : if (i->force) {
1700 :
1701 0 : RUN_WITH_UMASK(0000) {
1702 0 : mac_selinux_create_file_prepare(i->path, file_type);
1703 : /* FIXME: need to introduce mknodat_atomic() */
1704 0 : r = mknod_atomic(i->path, i->mode | file_type, i->major_minor);
1705 0 : mac_selinux_create_file_clear();
1706 : }
1707 :
1708 0 : if (r < 0)
1709 0 : return log_error_errno(r, "Failed to create device node \"%s\": %m", i->path);
1710 0 : creation = CREATION_FORCE;
1711 : } else {
1712 0 : log_debug("%s is not a device node.", i->path);
1713 0 : return 0;
1714 : }
1715 : } else
1716 0 : creation = CREATION_EXISTING;
1717 : } else
1718 0 : creation = CREATION_NORMAL;
1719 :
1720 0 : log_debug("%s %s device node \"%s\" %u:%u.",
1721 : creation_mode_verb_to_string(creation),
1722 : i->type == CREATE_BLOCK_DEVICE ? "block" : "char",
1723 : i->path, major(i->mode), minor(i->mode));
1724 :
1725 0 : fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1726 0 : if (fd < 0)
1727 0 : return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
1728 :
1729 0 : return fd_set_perms(i, fd, i->path, NULL);
1730 : }
1731 :
1732 0 : static int create_fifo(Item *i, const char *path) {
1733 0 : _cleanup_close_ int pfd = -1, fd = -1;
1734 : CreationMode creation;
1735 : struct stat st;
1736 : char *bn;
1737 : int r;
1738 :
1739 0 : pfd = path_open_parent_safe(path);
1740 0 : if (pfd < 0)
1741 0 : return pfd;
1742 :
1743 0 : bn = basename(path);
1744 :
1745 0 : RUN_WITH_UMASK(0000) {
1746 0 : mac_selinux_create_file_prepare(path, S_IFIFO);
1747 0 : r = mkfifoat(pfd, bn, i->mode);
1748 0 : mac_selinux_create_file_clear();
1749 : }
1750 :
1751 0 : if (r < 0) {
1752 0 : if (errno != EEXIST)
1753 0 : return log_error_errno(errno, "Failed to create fifo %s: %m", path);
1754 :
1755 0 : if (fstatat(pfd, bn, &st, AT_SYMLINK_NOFOLLOW) < 0)
1756 0 : return log_error_errno(errno, "stat(%s) failed: %m", path);
1757 :
1758 0 : if (!S_ISFIFO(st.st_mode)) {
1759 :
1760 0 : if (i->force) {
1761 0 : RUN_WITH_UMASK(0000) {
1762 0 : mac_selinux_create_file_prepare(path, S_IFIFO);
1763 0 : r = mkfifoat_atomic(pfd, bn, i->mode);
1764 0 : mac_selinux_create_file_clear();
1765 : }
1766 :
1767 0 : if (r < 0)
1768 0 : return log_error_errno(r, "Failed to create fifo %s: %m", path);
1769 0 : creation = CREATION_FORCE;
1770 : } else {
1771 0 : log_warning("\"%s\" already exists and is not a fifo.", path);
1772 0 : return 0;
1773 : }
1774 : } else
1775 0 : creation = CREATION_EXISTING;
1776 : } else
1777 0 : creation = CREATION_NORMAL;
1778 :
1779 0 : log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), path);
1780 :
1781 0 : fd = openat(pfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1782 0 : if (fd < 0)
1783 0 : return log_error_errno(errno, "Failed to openat(%s): %m", path);
1784 :
1785 0 : return fd_set_perms(i, fd, i->path, NULL);
1786 : }
1787 :
1788 : typedef int (*action_t)(Item *i, const char *path);
1789 : typedef int (*fdaction_t)(Item *i, int fd, const char *path, const struct stat *st);
1790 :
1791 0 : static int item_do(Item *i, int fd, const char *path, fdaction_t action) {
1792 : struct stat st;
1793 0 : int r = 0, q;
1794 :
1795 0 : assert(i);
1796 0 : assert(path);
1797 0 : assert(fd >= 0);
1798 :
1799 0 : if (fstat(fd, &st) < 0) {
1800 0 : r = log_error_errno(errno, "fstat() on file failed: %m");
1801 0 : goto finish;
1802 : }
1803 :
1804 : /* This returns the first error we run into, but nevertheless
1805 : * tries to go on */
1806 0 : r = action(i, fd, path, &st);
1807 :
1808 0 : if (S_ISDIR(st.st_mode)) {
1809 : char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
1810 0 : _cleanup_closedir_ DIR *d = NULL;
1811 : struct dirent *de;
1812 :
1813 : /* The passed 'fd' was opened with O_PATH. We need to convert
1814 : * it into a 'regular' fd before reading the directory content. */
1815 0 : xsprintf(procfs_path, "/proc/self/fd/%i", fd);
1816 :
1817 0 : d = opendir(procfs_path);
1818 0 : if (!d) {
1819 0 : log_error_errno(errno, "Failed to opendir() '%s': %m", procfs_path);
1820 0 : if (r == 0)
1821 0 : r = -errno;
1822 0 : goto finish;
1823 : }
1824 :
1825 0 : FOREACH_DIRENT_ALL(de, d, q = -errno; goto finish) {
1826 : int de_fd;
1827 :
1828 0 : if (dot_or_dot_dot(de->d_name))
1829 0 : continue;
1830 :
1831 0 : de_fd = openat(fd, de->d_name, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1832 0 : if (de_fd < 0)
1833 0 : q = log_error_errno(errno, "Failed to open() file '%s': %m", de->d_name);
1834 : else {
1835 0 : _cleanup_free_ char *de_path = NULL;
1836 :
1837 0 : de_path = path_join(path, de->d_name);
1838 0 : if (!de_path)
1839 0 : q = log_oom();
1840 : else
1841 : /* Pass ownership of dirent fd over */
1842 0 : q = item_do(i, de_fd, de_path, action);
1843 : }
1844 :
1845 0 : if (q < 0 && r == 0)
1846 0 : r = q;
1847 : }
1848 : }
1849 0 : finish:
1850 0 : safe_close(fd);
1851 0 : return r;
1852 : }
1853 :
1854 0 : static int glob_item(Item *i, action_t action) {
1855 0 : _cleanup_globfree_ glob_t g = {
1856 : .gl_opendir = (void *(*)(const char *)) opendir_nomod,
1857 : };
1858 0 : int r = 0, k;
1859 : char **fn;
1860 :
1861 0 : k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
1862 0 : if (k < 0 && k != -ENOENT)
1863 0 : return log_error_errno(k, "glob(%s) failed: %m", i->path);
1864 :
1865 0 : STRV_FOREACH(fn, g.gl_pathv) {
1866 0 : k = action(i, *fn);
1867 0 : if (k < 0 && r == 0)
1868 0 : r = k;
1869 : }
1870 :
1871 0 : return r;
1872 : }
1873 :
1874 0 : static int glob_item_recursively(Item *i, fdaction_t action) {
1875 0 : _cleanup_globfree_ glob_t g = {
1876 : .gl_opendir = (void *(*)(const char *)) opendir_nomod,
1877 : };
1878 0 : int r = 0, k;
1879 : char **fn;
1880 :
1881 0 : k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
1882 0 : if (k < 0 && k != -ENOENT)
1883 0 : return log_error_errno(k, "glob(%s) failed: %m", i->path);
1884 :
1885 0 : STRV_FOREACH(fn, g.gl_pathv) {
1886 0 : _cleanup_close_ int fd = -1;
1887 :
1888 : /* Make sure we won't trigger/follow file object (such as
1889 : * device nodes, automounts, ...) pointed out by 'fn' with
1890 : * O_PATH. Note, when O_PATH is used, flags other than
1891 : * O_CLOEXEC, O_DIRECTORY, and O_NOFOLLOW are ignored. */
1892 :
1893 0 : fd = open(*fn, O_CLOEXEC|O_NOFOLLOW|O_PATH);
1894 0 : if (fd < 0) {
1895 0 : log_error_errno(errno, "Opening '%s' failed: %m", *fn);
1896 0 : if (r == 0)
1897 0 : r = -errno;
1898 0 : continue;
1899 : }
1900 :
1901 0 : k = item_do(i, fd, *fn, action);
1902 0 : if (k < 0 && r == 0)
1903 0 : r = k;
1904 :
1905 : /* we passed fd ownership to the previous call */
1906 0 : fd = -1;
1907 : }
1908 :
1909 0 : return r;
1910 : }
1911 :
1912 27 : static int create_item(Item *i) {
1913 : CreationMode creation;
1914 27 : int r = 0;
1915 :
1916 27 : assert(i);
1917 :
1918 27 : log_debug("Running create action for entry %c %s", (char) i->type, i->path);
1919 :
1920 27 : switch (i->type) {
1921 :
1922 0 : case IGNORE_PATH:
1923 : case IGNORE_DIRECTORY_PATH:
1924 : case REMOVE_PATH:
1925 : case RECURSIVE_REMOVE_PATH:
1926 0 : return 0;
1927 :
1928 27 : case CREATE_FILE:
1929 54 : RUN_WITH_UMASK(0000)
1930 27 : (void) mkdir_parents_label(i->path, 0755);
1931 :
1932 27 : r = create_file(i, i->path);
1933 27 : if (r < 0)
1934 0 : return r;
1935 27 : break;
1936 :
1937 0 : case TRUNCATE_FILE:
1938 0 : RUN_WITH_UMASK(0000)
1939 0 : (void) mkdir_parents_label(i->path, 0755);
1940 :
1941 0 : r = truncate_file(i, i->path);
1942 0 : if (r < 0)
1943 0 : return r;
1944 0 : break;
1945 :
1946 0 : case COPY_FILES:
1947 0 : RUN_WITH_UMASK(0000)
1948 0 : (void) mkdir_parents_label(i->path, 0755);
1949 :
1950 0 : r = copy_files(i);
1951 0 : if (r < 0)
1952 0 : return r;
1953 0 : break;
1954 :
1955 0 : case WRITE_FILE:
1956 0 : r = glob_item(i, write_one_file);
1957 0 : if (r < 0)
1958 0 : return r;
1959 :
1960 0 : break;
1961 :
1962 0 : case CREATE_DIRECTORY:
1963 : case TRUNCATE_DIRECTORY:
1964 0 : RUN_WITH_UMASK(0000)
1965 0 : (void) mkdir_parents_label(i->path, 0755);
1966 :
1967 0 : r = create_directory(i, i->path);
1968 0 : if (r < 0)
1969 0 : return r;
1970 0 : break;
1971 :
1972 0 : case CREATE_SUBVOLUME:
1973 : case CREATE_SUBVOLUME_INHERIT_QUOTA:
1974 : case CREATE_SUBVOLUME_NEW_QUOTA:
1975 0 : RUN_WITH_UMASK(0000)
1976 0 : (void) mkdir_parents_label(i->path, 0755);
1977 :
1978 0 : r = create_subvolume(i, i->path);
1979 0 : if (r < 0)
1980 0 : return r;
1981 0 : break;
1982 :
1983 0 : case EMPTY_DIRECTORY:
1984 0 : r = glob_item(i, empty_directory);
1985 0 : if (r < 0)
1986 0 : return r;
1987 0 : break;
1988 :
1989 0 : case CREATE_FIFO:
1990 0 : RUN_WITH_UMASK(0000)
1991 0 : (void) mkdir_parents_label(i->path, 0755);
1992 :
1993 0 : r = create_fifo(i, i->path);
1994 0 : if (r < 0)
1995 0 : return r;
1996 0 : break;
1997 :
1998 0 : case CREATE_SYMLINK: {
1999 0 : RUN_WITH_UMASK(0000)
2000 0 : (void) mkdir_parents_label(i->path, 0755);
2001 :
2002 0 : mac_selinux_create_file_prepare(i->path, S_IFLNK);
2003 0 : r = symlink(i->argument, i->path);
2004 0 : mac_selinux_create_file_clear();
2005 :
2006 0 : if (r < 0) {
2007 0 : _cleanup_free_ char *x = NULL;
2008 :
2009 0 : if (errno != EEXIST)
2010 0 : return log_error_errno(errno, "symlink(%s, %s) failed: %m", i->argument, i->path);
2011 :
2012 0 : r = readlink_malloc(i->path, &x);
2013 0 : if (r < 0 || !streq(i->argument, x)) {
2014 :
2015 0 : if (i->force) {
2016 0 : mac_selinux_create_file_prepare(i->path, S_IFLNK);
2017 0 : r = symlink_atomic(i->argument, i->path);
2018 0 : mac_selinux_create_file_clear();
2019 :
2020 0 : if (IN_SET(r, -EISDIR, -EEXIST, -ENOTEMPTY)) {
2021 0 : r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL);
2022 0 : if (r < 0)
2023 0 : return log_error_errno(r, "rm -fr %s failed: %m", i->path);
2024 :
2025 0 : mac_selinux_create_file_prepare(i->path, S_IFLNK);
2026 0 : r = symlink(i->argument, i->path) < 0 ? -errno : 0;
2027 0 : mac_selinux_create_file_clear();
2028 : }
2029 0 : if (r < 0)
2030 0 : return log_error_errno(r, "symlink(%s, %s) failed: %m", i->argument, i->path);
2031 :
2032 0 : creation = CREATION_FORCE;
2033 : } else {
2034 0 : log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);
2035 0 : return 0;
2036 : }
2037 : } else
2038 0 : creation = CREATION_EXISTING;
2039 : } else
2040 :
2041 0 : creation = CREATION_NORMAL;
2042 0 : log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);
2043 0 : break;
2044 : }
2045 :
2046 0 : case CREATE_BLOCK_DEVICE:
2047 : case CREATE_CHAR_DEVICE:
2048 0 : if (have_effective_cap(CAP_MKNOD) == 0) {
2049 : /* In a container we lack CAP_MKNOD. We shouldn't attempt to create the device node in that
2050 : * case to avoid noise, and we don't support virtualized devices in containers anyway. */
2051 :
2052 0 : log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);
2053 0 : return 0;
2054 : }
2055 :
2056 0 : RUN_WITH_UMASK(0000)
2057 0 : (void) mkdir_parents_label(i->path, 0755);
2058 :
2059 0 : r = create_device(i, i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR);
2060 0 : if (r < 0)
2061 0 : return r;
2062 :
2063 0 : break;
2064 :
2065 0 : case ADJUST_MODE:
2066 : case RELABEL_PATH:
2067 0 : r = glob_item(i, path_set_perms);
2068 0 : if (r < 0)
2069 0 : return r;
2070 0 : break;
2071 :
2072 0 : case RECURSIVE_RELABEL_PATH:
2073 0 : r = glob_item_recursively(i, fd_set_perms);
2074 0 : if (r < 0)
2075 0 : return r;
2076 0 : break;
2077 :
2078 0 : case SET_XATTR:
2079 0 : r = glob_item(i, path_set_xattrs);
2080 0 : if (r < 0)
2081 0 : return r;
2082 0 : break;
2083 :
2084 0 : case RECURSIVE_SET_XATTR:
2085 0 : r = glob_item_recursively(i, fd_set_xattrs);
2086 0 : if (r < 0)
2087 0 : return r;
2088 0 : break;
2089 :
2090 0 : case SET_ACL:
2091 0 : r = glob_item(i, path_set_acls);
2092 0 : if (r < 0)
2093 0 : return r;
2094 0 : break;
2095 :
2096 0 : case RECURSIVE_SET_ACL:
2097 0 : r = glob_item_recursively(i, fd_set_acls);
2098 0 : if (r < 0)
2099 0 : return r;
2100 0 : break;
2101 :
2102 0 : case SET_ATTRIBUTE:
2103 0 : r = glob_item(i, path_set_attribute);
2104 0 : if (r < 0)
2105 0 : return r;
2106 0 : break;
2107 :
2108 0 : case RECURSIVE_SET_ATTRIBUTE:
2109 0 : r = glob_item_recursively(i, fd_set_attribute);
2110 0 : if (r < 0)
2111 0 : return r;
2112 0 : break;
2113 : }
2114 :
2115 27 : return 0;
2116 : }
2117 :
2118 0 : static int remove_item_instance(Item *i, const char *instance) {
2119 : int r;
2120 :
2121 0 : assert(i);
2122 :
2123 0 : switch (i->type) {
2124 :
2125 0 : case REMOVE_PATH:
2126 0 : if (remove(instance) < 0 && errno != ENOENT)
2127 0 : return log_error_errno(errno, "rm(%s): %m", instance);
2128 :
2129 0 : break;
2130 :
2131 0 : case RECURSIVE_REMOVE_PATH:
2132 : /* FIXME: we probably should use dir_cleanup() here instead of rm_rf() so that 'x' is honoured. */
2133 0 : log_debug("rm -rf \"%s\"", instance);
2134 0 : r = rm_rf(instance, REMOVE_ROOT|REMOVE_SUBVOLUME|REMOVE_PHYSICAL);
2135 0 : if (r < 0 && r != -ENOENT)
2136 0 : return log_error_errno(r, "rm_rf(%s): %m", instance);
2137 :
2138 0 : break;
2139 :
2140 0 : default:
2141 0 : assert_not_reached("wut?");
2142 : }
2143 :
2144 0 : return 0;
2145 : }
2146 :
2147 0 : static int remove_item(Item *i) {
2148 : int r;
2149 :
2150 0 : assert(i);
2151 :
2152 0 : log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
2153 :
2154 0 : switch (i->type) {
2155 :
2156 0 : case TRUNCATE_DIRECTORY:
2157 : /* FIXME: we probably should use dir_cleanup() here instead of rm_rf() so that 'x' is honoured. */
2158 0 : log_debug("rm -rf \"%s\"", i->path);
2159 0 : r = rm_rf(i->path, REMOVE_PHYSICAL);
2160 0 : if (r < 0 && r != -ENOENT)
2161 0 : return log_error_errno(r, "rm_rf(%s): %m", i->path);
2162 :
2163 0 : return 0;
2164 :
2165 0 : case REMOVE_PATH:
2166 : case RECURSIVE_REMOVE_PATH:
2167 0 : return glob_item(i, remove_item_instance);
2168 :
2169 0 : default:
2170 0 : return 0;
2171 : }
2172 : }
2173 :
2174 0 : static int clean_item_instance(Item *i, const char* instance) {
2175 0 : _cleanup_closedir_ DIR *d = NULL;
2176 : struct stat s, ps;
2177 : bool mountpoint;
2178 : usec_t cutoff, n;
2179 : char timestamp[FORMAT_TIMESTAMP_MAX];
2180 :
2181 0 : assert(i);
2182 :
2183 0 : if (!i->age_set)
2184 0 : return 0;
2185 :
2186 0 : n = now(CLOCK_REALTIME);
2187 0 : if (n < i->age)
2188 0 : return 0;
2189 :
2190 0 : cutoff = n - i->age;
2191 :
2192 0 : d = opendir_nomod(instance);
2193 0 : if (!d) {
2194 0 : if (IN_SET(errno, ENOENT, ENOTDIR)) {
2195 0 : log_debug_errno(errno, "Directory \"%s\": %m", instance);
2196 0 : return 0;
2197 : }
2198 :
2199 0 : return log_error_errno(errno, "Failed to open directory %s: %m", instance);
2200 : }
2201 :
2202 0 : if (fstat(dirfd(d), &s) < 0)
2203 0 : return log_error_errno(errno, "stat(%s) failed: %m", i->path);
2204 :
2205 0 : if (!S_ISDIR(s.st_mode))
2206 0 : return log_error_errno(SYNTHETIC_ERRNO(ENOTDIR),
2207 : "%s is not a directory.", i->path);
2208 :
2209 0 : if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
2210 0 : return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
2211 :
2212 0 : mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino;
2213 :
2214 0 : log_debug("Cleanup threshold for %s \"%s\" is %s",
2215 : mountpoint ? "mount point" : "directory",
2216 : instance,
2217 : format_timestamp_us(timestamp, sizeof(timestamp), cutoff));
2218 :
2219 0 : return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,
2220 0 : MAX_DEPTH, i->keep_first_level);
2221 : }
2222 :
2223 0 : static int clean_item(Item *i) {
2224 0 : assert(i);
2225 :
2226 0 : log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
2227 :
2228 0 : switch (i->type) {
2229 0 : case CREATE_DIRECTORY:
2230 : case CREATE_SUBVOLUME:
2231 : case CREATE_SUBVOLUME_INHERIT_QUOTA:
2232 : case CREATE_SUBVOLUME_NEW_QUOTA:
2233 : case TRUNCATE_DIRECTORY:
2234 : case IGNORE_PATH:
2235 : case COPY_FILES:
2236 0 : clean_item_instance(i, i->path);
2237 0 : return 0;
2238 0 : case EMPTY_DIRECTORY:
2239 : case IGNORE_DIRECTORY_PATH:
2240 0 : return glob_item(i, clean_item_instance);
2241 0 : default:
2242 0 : return 0;
2243 : }
2244 : }
2245 :
2246 27 : static int process_item(Item *i, OperationMask operation) {
2247 : OperationMask todo;
2248 : int r, q, p;
2249 :
2250 27 : assert(i);
2251 :
2252 27 : todo = operation & ~i->done;
2253 27 : if (todo == 0) /* Everything already done? */
2254 0 : return 0;
2255 :
2256 27 : i->done |= operation;
2257 :
2258 27 : r = chase_symlinks(i->path, arg_root, CHASE_NO_AUTOFS|CHASE_WARN, NULL);
2259 27 : if (r == -EREMOTE) {
2260 0 : log_notice_errno(r, "Skipping %s", i->path);
2261 0 : return 0;
2262 : }
2263 27 : if (r < 0)
2264 27 : log_debug_errno(r, "Failed to determine whether '%s' is below autofs, ignoring: %m", i->path);
2265 :
2266 27 : r = FLAGS_SET(operation, OPERATION_CREATE) ? create_item(i) : 0;
2267 : /* Failure can only be tolerated for create */
2268 27 : if (i->allow_failure)
2269 0 : r = 0;
2270 :
2271 27 : q = FLAGS_SET(operation, OPERATION_REMOVE) ? remove_item(i) : 0;
2272 27 : p = FLAGS_SET(operation, OPERATION_CLEAN) ? clean_item(i) : 0;
2273 :
2274 54 : return r < 0 ? r :
2275 27 : q < 0 ? q :
2276 : p;
2277 : }
2278 :
2279 27 : static int process_item_array(ItemArray *array, OperationMask operation) {
2280 27 : int r = 0;
2281 : size_t n;
2282 :
2283 27 : assert(array);
2284 :
2285 : /* Create any parent first. */
2286 27 : if (FLAGS_SET(operation, OPERATION_CREATE) && array->parent)
2287 0 : r = process_item_array(array->parent, operation & OPERATION_CREATE);
2288 :
2289 : /* Clean up all children first */
2290 27 : if ((operation & (OPERATION_REMOVE|OPERATION_CLEAN)) && !set_isempty(array->children)) {
2291 : Iterator i;
2292 : ItemArray *c;
2293 :
2294 0 : SET_FOREACH(c, array->children, i) {
2295 : int k;
2296 :
2297 0 : k = process_item_array(c, operation & (OPERATION_REMOVE|OPERATION_CLEAN));
2298 0 : if (k < 0 && r == 0)
2299 0 : r = k;
2300 : }
2301 : }
2302 :
2303 54 : for (n = 0; n < array->n_items; n++) {
2304 : int k;
2305 :
2306 27 : k = process_item(array->items + n, operation);
2307 27 : if (k < 0 && r == 0)
2308 0 : r = k;
2309 : }
2310 :
2311 27 : return r;
2312 : }
2313 :
2314 109 : static void item_free_contents(Item *i) {
2315 109 : assert(i);
2316 109 : free(i->path);
2317 109 : free(i->argument);
2318 109 : strv_free(i->xattrs);
2319 :
2320 : #if HAVE_ACL
2321 109 : acl_free(i->acl_access);
2322 109 : acl_free(i->acl_default);
2323 : #endif
2324 109 : }
2325 :
2326 27 : static ItemArray* item_array_free(ItemArray *a) {
2327 : size_t n;
2328 :
2329 27 : if (!a)
2330 0 : return NULL;
2331 :
2332 54 : for (n = 0; n < a->n_items; n++)
2333 27 : item_free_contents(a->items + n);
2334 :
2335 27 : set_free(a->children);
2336 27 : free(a->items);
2337 27 : return mfree(a);
2338 : }
2339 :
2340 0 : static int item_compare(const Item *a, const Item *b) {
2341 : /* Make sure that the ownership taking item is put first, so
2342 : * that we first create the node, and then can adjust it */
2343 :
2344 0 : if (takes_ownership(a->type) && !takes_ownership(b->type))
2345 0 : return -1;
2346 0 : if (!takes_ownership(a->type) && takes_ownership(b->type))
2347 0 : return 1;
2348 :
2349 0 : return CMP(a->type, b->type);
2350 : }
2351 :
2352 0 : static bool item_compatible(Item *a, Item *b) {
2353 0 : assert(a);
2354 0 : assert(b);
2355 0 : assert(streq(a->path, b->path));
2356 :
2357 0 : if (takes_ownership(a->type) && takes_ownership(b->type))
2358 : /* check if the items are the same */
2359 0 : return streq_ptr(a->argument, b->argument) &&
2360 :
2361 0 : a->uid_set == b->uid_set &&
2362 0 : a->uid == b->uid &&
2363 :
2364 0 : a->gid_set == b->gid_set &&
2365 0 : a->gid == b->gid &&
2366 :
2367 0 : a->mode_set == b->mode_set &&
2368 0 : a->mode == b->mode &&
2369 :
2370 0 : a->age_set == b->age_set &&
2371 0 : a->age == b->age &&
2372 :
2373 0 : a->mask_perms == b->mask_perms &&
2374 :
2375 0 : a->keep_first_level == b->keep_first_level &&
2376 :
2377 0 : a->major_minor == b->major_minor;
2378 :
2379 0 : return true;
2380 : }
2381 :
2382 32 : static bool should_include_path(const char *path) {
2383 : char **prefix;
2384 :
2385 32 : STRV_FOREACH(prefix, arg_exclude_prefixes)
2386 0 : if (path_startswith(path, *prefix)) {
2387 0 : log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
2388 : path, *prefix);
2389 0 : return false;
2390 : }
2391 :
2392 32 : STRV_FOREACH(prefix, arg_include_prefixes)
2393 0 : if (path_startswith(path, *prefix)) {
2394 0 : log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
2395 0 : return true;
2396 : }
2397 :
2398 : /* no matches, so we should include this path only if we
2399 : * have no whitelist at all */
2400 32 : if (strv_isempty(arg_include_prefixes))
2401 32 : return true;
2402 :
2403 0 : log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
2404 0 : return false;
2405 : }
2406 :
2407 32 : static int specifier_expansion_from_arg(Item *i) {
2408 32 : _cleanup_free_ char *unescaped = NULL, *resolved = NULL;
2409 : char **xattr;
2410 : int r;
2411 :
2412 32 : assert(i);
2413 :
2414 32 : if (!i->argument)
2415 0 : return 0;
2416 :
2417 32 : switch (i->type) {
2418 32 : case COPY_FILES:
2419 : case CREATE_SYMLINK:
2420 : case CREATE_FILE:
2421 : case TRUNCATE_FILE:
2422 : case WRITE_FILE:
2423 32 : r = cunescape(i->argument, 0, &unescaped);
2424 32 : if (r < 0)
2425 0 : return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);
2426 :
2427 32 : r = specifier_printf(unescaped, specifier_table, NULL, &resolved);
2428 32 : if (r < 0)
2429 5 : return r;
2430 :
2431 27 : free_and_replace(i->argument, resolved);
2432 27 : break;
2433 :
2434 0 : case SET_XATTR:
2435 : case RECURSIVE_SET_XATTR:
2436 0 : assert(i->xattrs);
2437 :
2438 0 : STRV_FOREACH (xattr, i->xattrs) {
2439 0 : r = specifier_printf(*xattr, specifier_table, NULL, &resolved);
2440 0 : if (r < 0)
2441 0 : return r;
2442 :
2443 0 : free_and_replace(*xattr, resolved);
2444 : }
2445 0 : break;
2446 :
2447 0 : default:
2448 0 : break;
2449 : }
2450 27 : return 0;
2451 : }
2452 :
2453 64 : static int patch_var_run(const char *fname, unsigned line, char **path) {
2454 : const char *k;
2455 : char *n;
2456 :
2457 64 : assert(path);
2458 64 : assert(*path);
2459 :
2460 : /* Optionally rewrites lines referencing /var/run/, to use /run/ instead. Why bother? tmpfiles merges lines in
2461 : * some cases and detects conflicts in others. If files/directories are specified through two equivalent lines
2462 : * this is problematic as neither case will be detected. Ideally we'd detect these cases by resolving symlinks
2463 : * early, but that's precisely not what we can do here as this code very likely is running very early on, at a
2464 : * time where the paths in question are not available yet, or even more importantly, our own tmpfiles rules
2465 : * might create the paths that are intermediary to the listed paths. We can't really cover the generic case,
2466 : * but the least we can do is cover the specific case of /var/run vs. /run, as /var/run is a legacy name for
2467 : * /run only, and we explicitly document that and require that on systemd systems the former is a symlink to
2468 : * the latter. Moreover files below this path are by far the primary usecase for tmpfiles.d/. */
2469 :
2470 64 : k = path_startswith(*path, "/var/run/");
2471 64 : if (isempty(k)) /* Don't complain about other paths than /var/run, and not about /var/run itself either. */
2472 64 : return 0;
2473 :
2474 0 : n = path_join("/run", k);
2475 0 : if (!n)
2476 0 : return log_oom();
2477 :
2478 : /* Also log about this briefly. We do so at LOG_NOTICE level, as we fixed up the situation automatically, hence
2479 : * there's no immediate need for action by the user. However, in the interest of making things less confusing
2480 : * to the user, let's still inform the user that these snippets should really be updated. */
2481 0 : log_syntax(NULL, LOG_NOTICE, fname, line, 0, "Line references path below legacy directory /var/run/, updating %s → %s; please update the tmpfiles.d/ drop-in file accordingly.", *path, n);
2482 :
2483 0 : free_and_replace(*path, n);
2484 :
2485 0 : return 0;
2486 : }
2487 :
2488 82 : static int parse_line(const char *fname, unsigned line, const char *buffer, bool *invalid_config) {
2489 :
2490 82 : _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
2491 82 : _cleanup_(item_free_contents) Item i = {};
2492 : ItemArray *existing;
2493 : OrderedHashmap *h;
2494 : int r, pos;
2495 82 : bool force = false, boot = false, allow_failure = false;
2496 :
2497 82 : assert(fname);
2498 82 : assert(line >= 1);
2499 82 : assert(buffer);
2500 :
2501 82 : r = extract_many_words(
2502 : &buffer,
2503 : NULL,
2504 : EXTRACT_UNQUOTE,
2505 : &action,
2506 : &path,
2507 : &mode,
2508 : &user,
2509 : &group,
2510 : &age,
2511 : NULL);
2512 82 : if (r < 0) {
2513 2 : if (IN_SET(r, -EINVAL, -EBADSLT))
2514 : /* invalid quoting and such or an unknown specifier */
2515 2 : *invalid_config = true;
2516 2 : return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
2517 80 : } else if (r < 2) {
2518 4 : *invalid_config = true;
2519 4 : log_error("[%s:%u] Syntax error.", fname, line);
2520 4 : return -EIO;
2521 : }
2522 :
2523 76 : if (!empty_or_dash(buffer)) {
2524 40 : i.argument = strdup(buffer);
2525 40 : if (!i.argument)
2526 0 : return log_oom();
2527 : }
2528 :
2529 76 : if (isempty(action)) {
2530 0 : *invalid_config = true;
2531 0 : log_error("[%s:%u] Command too short '%s'.", fname, line, action);
2532 0 : return -EINVAL;
2533 : }
2534 :
2535 88 : for (pos = 1; action[pos]; pos++) {
2536 20 : if (action[pos] == '!' && !boot)
2537 6 : boot = true;
2538 14 : else if (action[pos] == '+' && !force)
2539 6 : force = true;
2540 8 : else if (action[pos] == '-' && !allow_failure)
2541 0 : allow_failure = true;
2542 : else {
2543 8 : *invalid_config = true;
2544 8 : log_error("[%s:%u] Unknown modifiers in command '%s'",
2545 : fname, line, action);
2546 8 : return -EINVAL;
2547 : }
2548 : }
2549 :
2550 68 : if (boot && !arg_boot) {
2551 0 : log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",
2552 : action, path);
2553 0 : return 0;
2554 : }
2555 :
2556 68 : i.type = action[0];
2557 68 : i.force = force;
2558 68 : i.allow_failure = allow_failure;
2559 :
2560 68 : r = specifier_printf(path, specifier_table, NULL, &i.path);
2561 68 : if (r == -ENXIO)
2562 0 : return log_unresolvable_specifier(fname, line);
2563 68 : if (r < 0) {
2564 4 : if (IN_SET(r, -EINVAL, -EBADSLT))
2565 4 : *invalid_config = true;
2566 4 : return log_error_errno(r, "[%s:%u] Failed to replace specifiers: %s", fname, line, path);
2567 : }
2568 :
2569 64 : r = patch_var_run(fname, line, &i.path);
2570 64 : if (r < 0)
2571 0 : return r;
2572 :
2573 64 : switch (i.type) {
2574 :
2575 0 : case CREATE_DIRECTORY:
2576 : case CREATE_SUBVOLUME:
2577 : case CREATE_SUBVOLUME_INHERIT_QUOTA:
2578 : case CREATE_SUBVOLUME_NEW_QUOTA:
2579 : case EMPTY_DIRECTORY:
2580 : case TRUNCATE_DIRECTORY:
2581 : case CREATE_FIFO:
2582 : case IGNORE_PATH:
2583 : case IGNORE_DIRECTORY_PATH:
2584 : case REMOVE_PATH:
2585 : case RECURSIVE_REMOVE_PATH:
2586 : case ADJUST_MODE:
2587 : case RELABEL_PATH:
2588 : case RECURSIVE_RELABEL_PATH:
2589 0 : if (i.argument)
2590 0 : log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
2591 :
2592 0 : break;
2593 :
2594 29 : case CREATE_FILE:
2595 : case TRUNCATE_FILE:
2596 29 : break;
2597 :
2598 0 : case CREATE_SYMLINK:
2599 0 : if (!i.argument) {
2600 0 : i.argument = path_join("/usr/share/factory", i.path);
2601 0 : if (!i.argument)
2602 0 : return log_oom();
2603 : }
2604 0 : break;
2605 :
2606 9 : case WRITE_FILE:
2607 9 : if (!i.argument) {
2608 2 : *invalid_config = true;
2609 2 : log_error("[%s:%u] Write file requires argument.", fname, line);
2610 2 : return -EBADMSG;
2611 : }
2612 7 : break;
2613 :
2614 4 : case COPY_FILES:
2615 4 : if (!i.argument) {
2616 2 : i.argument = path_join(arg_root, "/usr/share/factory", i.path);
2617 2 : if (!i.argument)
2618 0 : return log_oom();
2619 :
2620 2 : } else if (!path_is_absolute(i.argument)) {
2621 2 : *invalid_config = true;
2622 2 : log_error("[%s:%u] Source path is not absolute.", fname, line);
2623 2 : return -EBADMSG;
2624 :
2625 0 : } else if (arg_root) {
2626 : char *p;
2627 :
2628 0 : p = path_join(arg_root, i.argument);
2629 0 : if (!p)
2630 0 : return log_oom();
2631 0 : free_and_replace(i.argument, p);
2632 : }
2633 :
2634 2 : path_simplify(i.argument, false);
2635 2 : break;
2636 :
2637 8 : case CREATE_CHAR_DEVICE:
2638 : case CREATE_BLOCK_DEVICE:
2639 8 : if (!i.argument) {
2640 8 : *invalid_config = true;
2641 8 : log_error("[%s:%u] Device file requires argument.", fname, line);
2642 8 : return -EBADMSG;
2643 : }
2644 :
2645 0 : r = parse_dev(i.argument, &i.major_minor);
2646 0 : if (r < 0) {
2647 0 : *invalid_config = true;
2648 0 : log_error_errno(r, "[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
2649 0 : return -EBADMSG;
2650 : }
2651 :
2652 0 : break;
2653 :
2654 4 : case SET_XATTR:
2655 : case RECURSIVE_SET_XATTR:
2656 4 : if (!i.argument) {
2657 4 : *invalid_config = true;
2658 4 : log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
2659 4 : return -EBADMSG;
2660 : }
2661 0 : r = parse_xattrs_from_arg(&i);
2662 0 : if (r < 0)
2663 0 : return r;
2664 0 : break;
2665 :
2666 4 : case SET_ACL:
2667 : case RECURSIVE_SET_ACL:
2668 4 : if (!i.argument) {
2669 4 : *invalid_config = true;
2670 4 : log_error("[%s:%u] Set ACLs requires argument.", fname, line);
2671 4 : return -EBADMSG;
2672 : }
2673 0 : r = parse_acls_from_arg(&i);
2674 0 : if (r < 0)
2675 0 : return r;
2676 0 : break;
2677 :
2678 4 : case SET_ATTRIBUTE:
2679 : case RECURSIVE_SET_ATTRIBUTE:
2680 4 : if (!i.argument) {
2681 4 : *invalid_config = true;
2682 4 : log_error("[%s:%u] Set file attribute requires argument.", fname, line);
2683 4 : return -EBADMSG;
2684 : }
2685 0 : r = parse_attribute_from_arg(&i);
2686 0 : if (IN_SET(r, -EINVAL, -EBADSLT))
2687 0 : *invalid_config = true;
2688 0 : if (r < 0)
2689 0 : return r;
2690 0 : break;
2691 :
2692 2 : default:
2693 2 : log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
2694 2 : *invalid_config = true;
2695 2 : return -EBADMSG;
2696 : }
2697 :
2698 38 : if (!path_is_absolute(i.path)) {
2699 6 : log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
2700 6 : *invalid_config = true;
2701 6 : return -EBADMSG;
2702 : }
2703 :
2704 32 : path_simplify(i.path, false);
2705 :
2706 32 : if (!should_include_path(i.path))
2707 0 : return 0;
2708 :
2709 32 : r = specifier_expansion_from_arg(&i);
2710 32 : if (r == -ENXIO)
2711 1 : return log_unresolvable_specifier(fname, line);
2712 31 : if (r < 0) {
2713 4 : if (IN_SET(r, -EINVAL, -EBADSLT))
2714 4 : *invalid_config = true;
2715 4 : return log_error_errno(r, "[%s:%u] Failed to substitute specifiers in argument: %m",
2716 : fname, line);
2717 : }
2718 :
2719 27 : if (arg_root) {
2720 : char *p;
2721 :
2722 0 : p = path_join(arg_root, i.path);
2723 0 : if (!p)
2724 0 : return log_oom();
2725 0 : free_and_replace(i.path, p);
2726 : }
2727 :
2728 27 : if (!empty_or_dash(user)) {
2729 0 : const char *u = user;
2730 :
2731 0 : r = get_user_creds(&u, &i.uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING);
2732 0 : if (r < 0) {
2733 0 : *invalid_config = true;
2734 0 : return log_error_errno(r, "[%s:%u] Unknown user '%s'.", fname, line, user);
2735 : }
2736 :
2737 0 : i.uid_set = true;
2738 : }
2739 :
2740 27 : if (!empty_or_dash(group)) {
2741 0 : const char *g = group;
2742 :
2743 0 : r = get_group_creds(&g, &i.gid, USER_CREDS_ALLOW_MISSING);
2744 0 : if (r < 0) {
2745 0 : *invalid_config = true;
2746 0 : log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
2747 0 : return r;
2748 : }
2749 :
2750 0 : i.gid_set = true;
2751 : }
2752 :
2753 27 : if (!empty_or_dash(mode)) {
2754 0 : const char *mm = mode;
2755 : unsigned m;
2756 :
2757 0 : if (*mm == '~') {
2758 0 : i.mask_perms = true;
2759 0 : mm++;
2760 : }
2761 :
2762 0 : if (parse_mode(mm, &m) < 0) {
2763 0 : *invalid_config = true;
2764 0 : log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
2765 0 : return -EBADMSG;
2766 : }
2767 :
2768 0 : i.mode = m;
2769 0 : i.mode_set = true;
2770 : } else
2771 27 : i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
2772 :
2773 27 : if (!empty_or_dash(age)) {
2774 0 : const char *a = age;
2775 :
2776 0 : if (*a == '~') {
2777 0 : i.keep_first_level = true;
2778 0 : a++;
2779 : }
2780 :
2781 0 : if (parse_sec(a, &i.age) < 0) {
2782 0 : *invalid_config = true;
2783 0 : log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
2784 0 : return -EBADMSG;
2785 : }
2786 :
2787 0 : i.age_set = true;
2788 : }
2789 :
2790 27 : h = needs_glob(i.type) ? globs : items;
2791 :
2792 27 : existing = ordered_hashmap_get(h, i.path);
2793 27 : if (existing) {
2794 : size_t n;
2795 :
2796 0 : for (n = 0; n < existing->n_items; n++) {
2797 0 : if (!item_compatible(existing->items + n, &i)) {
2798 0 : log_notice("[%s:%u] Duplicate line for path \"%s\", ignoring.",
2799 : fname, line, i.path);
2800 0 : return 0;
2801 : }
2802 : }
2803 : } else {
2804 27 : existing = new0(ItemArray, 1);
2805 27 : if (!existing)
2806 0 : return log_oom();
2807 :
2808 27 : r = ordered_hashmap_put(h, i.path, existing);
2809 27 : if (r < 0) {
2810 0 : free(existing);
2811 0 : return log_oom();
2812 : }
2813 : }
2814 :
2815 27 : if (!GREEDY_REALLOC(existing->items, existing->allocated, existing->n_items + 1))
2816 0 : return log_oom();
2817 :
2818 27 : existing->items[existing->n_items++] = i;
2819 27 : i = (struct Item) {};
2820 :
2821 : /* Sort item array, to enforce stable ordering of application */
2822 27 : typesafe_qsort(existing->items, existing->n_items, item_compare);
2823 :
2824 27 : return 0;
2825 : }
2826 :
2827 0 : static int cat_config(char **config_dirs, char **args) {
2828 0 : _cleanup_strv_free_ char **files = NULL;
2829 : int r;
2830 :
2831 0 : r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, NULL);
2832 0 : if (r < 0)
2833 0 : return r;
2834 :
2835 0 : return cat_files(NULL, files, 0);
2836 : }
2837 :
2838 3 : static int help(void) {
2839 3 : _cleanup_free_ char *link = NULL;
2840 : int r;
2841 :
2842 3 : r = terminal_urlify_man("systemd-tmpfiles", "8", &link);
2843 3 : if (r < 0)
2844 0 : return log_oom();
2845 :
2846 3 : printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
2847 : "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
2848 : " -h --help Show this help\n"
2849 : " --user Execute user configuration\n"
2850 : " --version Show package version\n"
2851 : " --cat-config Show configuration files\n"
2852 : " --create Create marked files/directories\n"
2853 : " --clean Clean up marked directories\n"
2854 : " --remove Remove marked files/directories\n"
2855 : " --boot Execute actions only safe at boot\n"
2856 : " --prefix=PATH Only apply rules with the specified prefix\n"
2857 : " --exclude-prefix=PATH Ignore rules with the specified prefix\n"
2858 : " --root=PATH Operate on an alternate filesystem root\n"
2859 : " --replace=PATH Treat arguments as replacement for PATH\n"
2860 : " --no-pager Do not pipe output into a pager\n"
2861 : "\nSee the %s for details.\n"
2862 : , program_invocation_short_name
2863 : , link
2864 : );
2865 :
2866 3 : return 0;
2867 : }
2868 :
2869 86 : static int parse_argv(int argc, char *argv[]) {
2870 :
2871 : enum {
2872 : ARG_VERSION = 0x100,
2873 : ARG_CAT_CONFIG,
2874 : ARG_USER,
2875 : ARG_CREATE,
2876 : ARG_CLEAN,
2877 : ARG_REMOVE,
2878 : ARG_BOOT,
2879 : ARG_PREFIX,
2880 : ARG_EXCLUDE_PREFIX,
2881 : ARG_ROOT,
2882 : ARG_REPLACE,
2883 : ARG_NO_PAGER,
2884 : };
2885 :
2886 : static const struct option options[] = {
2887 : { "help", no_argument, NULL, 'h' },
2888 : { "user", no_argument, NULL, ARG_USER },
2889 : { "version", no_argument, NULL, ARG_VERSION },
2890 : { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
2891 : { "create", no_argument, NULL, ARG_CREATE },
2892 : { "clean", no_argument, NULL, ARG_CLEAN },
2893 : { "remove", no_argument, NULL, ARG_REMOVE },
2894 : { "boot", no_argument, NULL, ARG_BOOT },
2895 : { "prefix", required_argument, NULL, ARG_PREFIX },
2896 : { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
2897 : { "root", required_argument, NULL, ARG_ROOT },
2898 : { "replace", required_argument, NULL, ARG_REPLACE },
2899 : { "no-pager", no_argument, NULL, ARG_NO_PAGER },
2900 : {}
2901 : };
2902 :
2903 : int c, r;
2904 :
2905 86 : assert(argc >= 0);
2906 86 : assert(argv);
2907 :
2908 208 : while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
2909 :
2910 126 : switch (c) {
2911 :
2912 3 : case 'h':
2913 3 : return help();
2914 :
2915 0 : case ARG_VERSION:
2916 0 : return version();
2917 :
2918 0 : case ARG_CAT_CONFIG:
2919 0 : arg_cat_config = true;
2920 0 : break;
2921 :
2922 40 : case ARG_USER:
2923 40 : arg_user = true;
2924 40 : break;
2925 :
2926 82 : case ARG_CREATE:
2927 82 : arg_operation |= OPERATION_CREATE;
2928 82 : break;
2929 :
2930 0 : case ARG_CLEAN:
2931 0 : arg_operation |= OPERATION_CLEAN;
2932 0 : break;
2933 :
2934 0 : case ARG_REMOVE:
2935 0 : arg_operation |= OPERATION_REMOVE;
2936 0 : break;
2937 :
2938 0 : case ARG_BOOT:
2939 0 : arg_boot = true;
2940 0 : break;
2941 :
2942 0 : case ARG_PREFIX:
2943 0 : if (strv_push(&arg_include_prefixes, optarg) < 0)
2944 0 : return log_oom();
2945 0 : break;
2946 :
2947 0 : case ARG_EXCLUDE_PREFIX:
2948 0 : if (strv_push(&arg_exclude_prefixes, optarg) < 0)
2949 0 : return log_oom();
2950 0 : break;
2951 :
2952 0 : case ARG_ROOT:
2953 0 : r = parse_path_argument_and_warn(optarg, true, &arg_root);
2954 0 : if (r < 0)
2955 0 : return r;
2956 0 : break;
2957 :
2958 0 : case ARG_REPLACE:
2959 0 : if (!path_is_absolute(optarg) ||
2960 0 : !endswith(optarg, ".conf"))
2961 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2962 : "The argument to --replace= must an absolute path to a config file");
2963 :
2964 0 : arg_replace = optarg;
2965 0 : break;
2966 :
2967 0 : case ARG_NO_PAGER:
2968 0 : arg_pager_flags |= PAGER_DISABLE;
2969 0 : break;
2970 :
2971 1 : case '?':
2972 1 : return -EINVAL;
2973 :
2974 0 : default:
2975 0 : assert_not_reached("Unhandled option");
2976 : }
2977 :
2978 82 : if (arg_operation == 0 && !arg_cat_config)
2979 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2980 : "You need to specify at least one of --clean, --create or --remove.");
2981 :
2982 82 : if (arg_replace && arg_cat_config)
2983 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2984 : "Option --replace= is not supported with --cat-config");
2985 :
2986 82 : if (arg_replace && optind >= argc)
2987 0 : return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2988 : "When --replace= is given, some configuration items must be specified");
2989 :
2990 82 : return 1;
2991 : }
2992 :
2993 82 : static int read_config_file(char **config_dirs, const char *fn, bool ignore_enoent, bool *invalid_config) {
2994 82 : _cleanup_fclose_ FILE *_f = NULL;
2995 : Iterator iterator;
2996 82 : unsigned v = 0;
2997 : FILE *f;
2998 : Item *i;
2999 82 : int r = 0;
3000 :
3001 82 : assert(fn);
3002 :
3003 82 : if (streq(fn, "-")) {
3004 82 : log_debug("Reading config from stdin…");
3005 82 : fn = "<stdin>";
3006 82 : f = stdin;
3007 : } else {
3008 0 : r = search_and_fopen(fn, "re", arg_root, (const char**) config_dirs, &_f);
3009 0 : if (r < 0) {
3010 0 : if (ignore_enoent && r == -ENOENT) {
3011 0 : log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
3012 0 : return 0;
3013 : }
3014 :
3015 0 : return log_error_errno(r, "Failed to open '%s': %m", fn);
3016 : }
3017 0 : log_debug("Reading config file \"%s\"…", fn);
3018 0 : f = _f;
3019 : }
3020 :
3021 82 : for (;;) {
3022 164 : _cleanup_free_ char *line = NULL;
3023 164 : bool invalid_line = false;
3024 : char *l;
3025 : int k;
3026 :
3027 164 : k = read_line(f, LONG_LINE_MAX, &line);
3028 164 : if (k < 0)
3029 0 : return log_error_errno(k, "Failed to read '%s': %m", fn);
3030 164 : if (k == 0)
3031 82 : break;
3032 :
3033 82 : v++;
3034 :
3035 82 : l = strstrip(line);
3036 82 : if (IN_SET(*l, 0, '#'))
3037 0 : continue;
3038 :
3039 82 : k = parse_line(fn, v, l, &invalid_line);
3040 82 : if (k < 0) {
3041 54 : if (invalid_line)
3042 : /* Allow reporting with a special code if the caller requested this */
3043 54 : *invalid_config = true;
3044 0 : else if (r == 0)
3045 : /* The first error becomes our return value */
3046 0 : r = k;
3047 : }
3048 : }
3049 :
3050 : /* we have to determine age parameter for each entry of type X */
3051 82 : ORDERED_HASHMAP_FOREACH(i, globs, iterator) {
3052 : Iterator iter;
3053 0 : Item *j, *candidate_item = NULL;
3054 :
3055 0 : if (i->type != IGNORE_DIRECTORY_PATH)
3056 0 : continue;
3057 :
3058 0 : ORDERED_HASHMAP_FOREACH(j, items, iter) {
3059 0 : if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))
3060 0 : continue;
3061 :
3062 0 : if (path_equal(j->path, i->path)) {
3063 0 : candidate_item = j;
3064 0 : break;
3065 : }
3066 :
3067 0 : if ((!candidate_item && path_startswith(i->path, j->path)) ||
3068 0 : (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
3069 0 : candidate_item = j;
3070 : }
3071 :
3072 0 : if (candidate_item && candidate_item->age_set) {
3073 0 : i->age = candidate_item->age;
3074 0 : i->age_set = true;
3075 : }
3076 : }
3077 :
3078 82 : if (ferror(f)) {
3079 0 : log_error_errno(errno, "Failed to read from file %s: %m", fn);
3080 0 : if (r == 0)
3081 0 : r = -EIO;
3082 : }
3083 :
3084 82 : return r;
3085 : }
3086 :
3087 82 : static int parse_arguments(char **config_dirs, char **args, bool *invalid_config) {
3088 : char **arg;
3089 : int r;
3090 :
3091 164 : STRV_FOREACH(arg, args) {
3092 82 : r = read_config_file(config_dirs, *arg, false, invalid_config);
3093 82 : if (r < 0)
3094 0 : return r;
3095 : }
3096 :
3097 82 : return 0;
3098 : }
3099 :
3100 0 : static int read_config_files(char **config_dirs, char **args, bool *invalid_config) {
3101 0 : _cleanup_strv_free_ char **files = NULL;
3102 0 : _cleanup_free_ char *p = NULL;
3103 : char **f;
3104 : int r;
3105 :
3106 0 : r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, &p);
3107 0 : if (r < 0)
3108 0 : return r;
3109 :
3110 0 : STRV_FOREACH(f, files)
3111 0 : if (p && path_equal(*f, p)) {
3112 0 : log_debug("Parsing arguments at position \"%s\"…", *f);
3113 :
3114 0 : r = parse_arguments(config_dirs, args, invalid_config);
3115 0 : if (r < 0)
3116 0 : return r;
3117 : } else
3118 : /* Just warn, ignore result otherwise.
3119 : * read_config_file() has some debug output, so no need to print anything. */
3120 0 : (void) read_config_file(config_dirs, *f, true, invalid_config);
3121 :
3122 0 : return 0;
3123 : }
3124 :
3125 27 : static int link_parent(ItemArray *a) {
3126 : const char *path;
3127 : char *prefix;
3128 : int r;
3129 :
3130 27 : assert(a);
3131 :
3132 : /* Finds the closest "parent" item array for the specified item array. Then registers the specified item array
3133 : * as child of it, and fills the parent in, linking them both ways. This allows us to later create parents
3134 : * before their children, and clean up/remove children before their parents. */
3135 :
3136 27 : if (a->n_items <= 0)
3137 0 : return 0;
3138 :
3139 27 : path = a->items[0].path;
3140 27 : prefix = newa(char, strlen(path) + 1);
3141 108 : PATH_FOREACH_PREFIX(prefix, path) {
3142 : ItemArray *j;
3143 :
3144 81 : j = ordered_hashmap_get(items, prefix);
3145 81 : if (!j)
3146 81 : j = ordered_hashmap_get(globs, prefix);
3147 81 : if (j) {
3148 0 : r = set_ensure_allocated(&j->children, NULL);
3149 0 : if (r < 0)
3150 0 : return log_oom();
3151 :
3152 0 : r = set_put(j->children, a);
3153 0 : if (r < 0)
3154 0 : return log_oom();
3155 :
3156 0 : a->parent = j;
3157 0 : return 1;
3158 : }
3159 : }
3160 :
3161 27 : return 0;
3162 : }
3163 :
3164 27 : DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_array_hash_ops, char, string_hash_func, string_compare_func,
3165 : ItemArray, item_array_free);
3166 :
3167 86 : static int run(int argc, char *argv[]) {
3168 86 : _cleanup_strv_free_ char **config_dirs = NULL;
3169 86 : bool invalid_config = false;
3170 : Iterator iterator;
3171 : ItemArray *a;
3172 : enum {
3173 : PHASE_REMOVE_AND_CLEAN,
3174 : PHASE_CREATE,
3175 : _PHASE_MAX
3176 : } phase;
3177 : int r, k;
3178 :
3179 86 : r = parse_argv(argc, argv);
3180 86 : if (r <= 0)
3181 4 : return r;
3182 :
3183 82 : log_setup_service();
3184 :
3185 : /* Descending down file system trees might take a lot of fds */
3186 82 : (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE);
3187 :
3188 82 : if (arg_user) {
3189 40 : r = user_config_paths(&config_dirs);
3190 40 : if (r < 0)
3191 0 : return log_error_errno(r, "Failed to initialize configuration directory list: %m");
3192 : } else {
3193 42 : config_dirs = strv_split_nulstr(CONF_PATHS_NULSTR("tmpfiles.d"));
3194 42 : if (!config_dirs)
3195 0 : return log_oom();
3196 : }
3197 :
3198 82 : if (DEBUG_LOGGING) {
3199 0 : _cleanup_free_ char *t = NULL;
3200 :
3201 0 : t = strv_join(config_dirs, "\n\t");
3202 0 : if (t)
3203 0 : log_debug("Looking for configuration files in (higher priority first):\n\t%s", t);
3204 : }
3205 :
3206 82 : if (arg_cat_config) {
3207 0 : (void) pager_open(arg_pager_flags);
3208 :
3209 0 : return cat_config(config_dirs, argv + optind);
3210 : }
3211 :
3212 82 : umask(0022);
3213 :
3214 82 : mac_selinux_init();
3215 :
3216 82 : items = ordered_hashmap_new(&item_array_hash_ops);
3217 82 : globs = ordered_hashmap_new(&item_array_hash_ops);
3218 82 : if (!items || !globs)
3219 0 : return log_oom();
3220 :
3221 : /* If command line arguments are specified along with --replace, read all
3222 : * configuration files and insert the positional arguments at the specified
3223 : * place. Otherwise, if command line arguments are specified, execute just
3224 : * them, and finally, without --replace= or any positional arguments, just
3225 : * read configuration and execute it.
3226 : */
3227 82 : if (arg_replace || optind >= argc)
3228 0 : r = read_config_files(config_dirs, argv + optind, &invalid_config);
3229 : else
3230 82 : r = parse_arguments(config_dirs, argv + optind, &invalid_config);
3231 82 : if (r < 0)
3232 0 : return r;
3233 :
3234 : /* Let's now link up all child/parent relationships */
3235 109 : ORDERED_HASHMAP_FOREACH(a, items, iterator) {
3236 27 : r = link_parent(a);
3237 27 : if (r < 0)
3238 0 : return r;
3239 : }
3240 82 : ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
3241 0 : r = link_parent(a);
3242 0 : if (r < 0)
3243 0 : return r;
3244 : }
3245 :
3246 : /* If multiple operations are requested, let's first run the remove/clean operations, and only then the create
3247 : * operations. i.e. that we first clean out the platform we then build on. */
3248 246 : for (phase = 0; phase < _PHASE_MAX; phase++) {
3249 : OperationMask op;
3250 :
3251 164 : if (phase == PHASE_REMOVE_AND_CLEAN)
3252 82 : op = arg_operation & (OPERATION_REMOVE|OPERATION_CLEAN);
3253 82 : else if (phase == PHASE_CREATE)
3254 82 : op = arg_operation & OPERATION_CREATE;
3255 : else
3256 0 : assert_not_reached("unexpected phase");
3257 :
3258 164 : if (op == 0) /* Nothing requested in this phase */
3259 82 : continue;
3260 :
3261 : /* The non-globbing ones usually create things, hence we apply them first */
3262 109 : ORDERED_HASHMAP_FOREACH(a, items, iterator) {
3263 27 : k = process_item_array(a, op);
3264 27 : if (k < 0 && r >= 0)
3265 0 : r = k;
3266 : }
3267 :
3268 : /* The globbing ones usually alter things, hence we apply them second. */
3269 82 : ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
3270 0 : k = process_item_array(a, op);
3271 0 : if (k < 0 && r >= 0)
3272 0 : r = k;
3273 : }
3274 : }
3275 :
3276 82 : if (ERRNO_IS_RESOURCE(-r))
3277 0 : return r;
3278 82 : if (invalid_config)
3279 54 : return EX_DATAERR;
3280 28 : if (r < 0)
3281 0 : return EX_CANTCREAT;
3282 28 : return 0;
3283 : }
3284 :
3285 86 : DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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