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