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1 | /*** | |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering, Kay Sievers | |
5 | Copyright 2015 Zbigniew Jędrzejewski-Szmek | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <dirent.h> | |
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
24 | #include <fnmatch.h> | |
25 | #include <getopt.h> | |
26 | #include <glob.h> | |
27 | #include <limits.h> | |
28 | #include <linux/fs.h> | |
29 | #include <stdbool.h> | |
30 | #include <stddef.h> | |
31 | #include <stdio.h> | |
32 | #include <stdlib.h> | |
33 | #include <string.h> | |
34 | #include <sys/stat.h> | |
35 | #include <sys/xattr.h> | |
36 | #include <time.h> | |
37 | #include <unistd.h> | |
38 | ||
39 | #include "acl-util.h" | |
40 | #include "alloc-util.h" | |
41 | #include "btrfs-util.h" | |
42 | #include "capability-util.h" | |
43 | #include "chattr-util.h" | |
44 | #include "conf-files.h" | |
45 | #include "copy.h" | |
46 | #include "def.h" | |
47 | #include "escape.h" | |
48 | #include "fd-util.h" | |
49 | #include "fileio.h" | |
50 | #include "formats-util.h" | |
51 | #include "fs-util.h" | |
52 | #include "glob-util.h" | |
53 | #include "io-util.h" | |
54 | #include "label.h" | |
55 | #include "log.h" | |
56 | #include "macro.h" | |
57 | #include "missing.h" | |
58 | #include "mkdir.h" | |
59 | #include "mount-util.h" | |
60 | #include "parse-util.h" | |
61 | #include "path-util.h" | |
62 | #include "rm-rf.h" | |
63 | #include "selinux-util.h" | |
64 | #include "set.h" | |
65 | #include "specifier.h" | |
66 | #include "stat-util.h" | |
67 | #include "stdio-util.h" | |
68 | #include "string-table.h" | |
69 | #include "string-util.h" | |
70 | #include "strv.h" | |
71 | #include "umask-util.h" | |
72 | #include "user-util.h" | |
73 | #include "util.h" | |
74 | ||
75 | /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates | |
76 | * them in the file system. This is intended to be used to create | |
77 | * properly owned directories beneath /tmp, /var/tmp, /run, which are | |
78 | * volatile and hence need to be recreated on bootup. */ | |
79 | ||
80 | typedef enum ItemType { | |
81 | /* These ones take file names */ | |
82 | CREATE_FILE = 'f', | |
83 | TRUNCATE_FILE = 'F', | |
84 | CREATE_DIRECTORY = 'd', | |
85 | TRUNCATE_DIRECTORY = 'D', | |
86 | CREATE_SUBVOLUME = 'v', | |
87 | CREATE_SUBVOLUME_INHERIT_QUOTA = 'q', | |
88 | CREATE_SUBVOLUME_NEW_QUOTA = 'Q', | |
89 | CREATE_FIFO = 'p', | |
90 | CREATE_SYMLINK = 'L', | |
91 | CREATE_CHAR_DEVICE = 'c', | |
92 | CREATE_BLOCK_DEVICE = 'b', | |
93 | COPY_FILES = 'C', | |
94 | ||
95 | /* These ones take globs */ | |
96 | WRITE_FILE = 'w', | |
97 | SET_XATTR = 't', | |
98 | RECURSIVE_SET_XATTR = 'T', | |
99 | SET_ACL = 'a', | |
100 | RECURSIVE_SET_ACL = 'A', | |
101 | SET_ATTRIBUTE = 'h', | |
102 | RECURSIVE_SET_ATTRIBUTE = 'H', | |
103 | IGNORE_PATH = 'x', | |
104 | IGNORE_DIRECTORY_PATH = 'X', | |
105 | REMOVE_PATH = 'r', | |
106 | RECURSIVE_REMOVE_PATH = 'R', | |
107 | RELABEL_PATH = 'z', | |
108 | RECURSIVE_RELABEL_PATH = 'Z', | |
109 | ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */ | |
110 | } ItemType; | |
111 | ||
112 | typedef struct Item { | |
113 | ItemType type; | |
114 | ||
115 | char *path; | |
116 | char *argument; | |
117 | char **xattrs; | |
118 | #ifdef HAVE_ACL | |
119 | acl_t acl_access; | |
120 | acl_t acl_default; | |
121 | #endif | |
122 | uid_t uid; | |
123 | gid_t gid; | |
124 | mode_t mode; | |
125 | usec_t age; | |
126 | ||
127 | dev_t major_minor; | |
128 | unsigned attribute_value; | |
129 | unsigned attribute_mask; | |
130 | ||
131 | bool uid_set:1; | |
132 | bool gid_set:1; | |
133 | bool mode_set:1; | |
134 | bool age_set:1; | |
135 | bool mask_perms:1; | |
136 | bool attribute_set:1; | |
137 | ||
138 | bool keep_first_level:1; | |
139 | ||
140 | bool force:1; | |
141 | ||
142 | bool done:1; | |
143 | } Item; | |
144 | ||
145 | typedef struct ItemArray { | |
146 | Item *items; | |
147 | size_t count; | |
148 | size_t size; | |
149 | } ItemArray; | |
150 | ||
151 | static bool arg_create = false; | |
152 | static bool arg_clean = false; | |
153 | static bool arg_remove = false; | |
154 | static bool arg_boot = false; | |
155 | ||
156 | static char **arg_include_prefixes = NULL; | |
157 | static char **arg_exclude_prefixes = NULL; | |
158 | static char *arg_root = NULL; | |
159 | ||
160 | static const char conf_file_dirs[] = CONF_PATHS_NULSTR("tmpfiles.d"); | |
161 | ||
162 | #define MAX_DEPTH 256 | |
163 | ||
164 | static OrderedHashmap *items = NULL, *globs = NULL; | |
165 | static Set *unix_sockets = NULL; | |
166 | ||
167 | static const Specifier specifier_table[] = { | |
168 | { 'm', specifier_machine_id, NULL }, | |
169 | { 'b', specifier_boot_id, NULL }, | |
170 | { 'H', specifier_host_name, NULL }, | |
171 | { 'v', specifier_kernel_release, NULL }, | |
172 | {} | |
173 | }; | |
174 | ||
175 | static bool needs_glob(ItemType t) { | |
176 | return IN_SET(t, | |
177 | WRITE_FILE, | |
178 | IGNORE_PATH, | |
179 | IGNORE_DIRECTORY_PATH, | |
180 | REMOVE_PATH, | |
181 | RECURSIVE_REMOVE_PATH, | |
182 | ADJUST_MODE, | |
183 | RELABEL_PATH, | |
184 | RECURSIVE_RELABEL_PATH, | |
185 | SET_XATTR, | |
186 | RECURSIVE_SET_XATTR, | |
187 | SET_ACL, | |
188 | RECURSIVE_SET_ACL, | |
189 | SET_ATTRIBUTE, | |
190 | RECURSIVE_SET_ATTRIBUTE); | |
191 | } | |
192 | ||
193 | static bool takes_ownership(ItemType t) { | |
194 | return IN_SET(t, | |
195 | CREATE_FILE, | |
196 | TRUNCATE_FILE, | |
197 | CREATE_DIRECTORY, | |
198 | TRUNCATE_DIRECTORY, | |
199 | CREATE_SUBVOLUME, | |
200 | CREATE_SUBVOLUME_INHERIT_QUOTA, | |
201 | CREATE_SUBVOLUME_NEW_QUOTA, | |
202 | CREATE_FIFO, | |
203 | CREATE_SYMLINK, | |
204 | CREATE_CHAR_DEVICE, | |
205 | CREATE_BLOCK_DEVICE, | |
206 | COPY_FILES, | |
207 | WRITE_FILE, | |
208 | IGNORE_PATH, | |
209 | IGNORE_DIRECTORY_PATH, | |
210 | REMOVE_PATH, | |
211 | RECURSIVE_REMOVE_PATH); | |
212 | } | |
213 | ||
214 | static struct Item* find_glob(OrderedHashmap *h, const char *match) { | |
215 | ItemArray *j; | |
216 | Iterator i; | |
217 | ||
218 | ORDERED_HASHMAP_FOREACH(j, h, i) { | |
219 | unsigned n; | |
220 | ||
221 | for (n = 0; n < j->count; n++) { | |
222 | Item *item = j->items + n; | |
223 | ||
224 | if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0) | |
225 | return item; | |
226 | } | |
227 | } | |
228 | ||
229 | return NULL; | |
230 | } | |
231 | ||
232 | static void load_unix_sockets(void) { | |
233 | _cleanup_fclose_ FILE *f = NULL; | |
234 | char line[LINE_MAX]; | |
235 | ||
236 | if (unix_sockets) | |
237 | return; | |
238 | ||
239 | /* We maintain a cache of the sockets we found in | |
240 | * /proc/net/unix to speed things up a little. */ | |
241 | ||
242 | unix_sockets = set_new(&string_hash_ops); | |
243 | if (!unix_sockets) | |
244 | return; | |
245 | ||
246 | f = fopen("/proc/net/unix", "re"); | |
247 | if (!f) | |
248 | return; | |
249 | ||
250 | /* Skip header */ | |
251 | if (!fgets(line, sizeof(line), f)) | |
252 | goto fail; | |
253 | ||
254 | for (;;) { | |
255 | char *p, *s; | |
256 | int k; | |
257 | ||
258 | if (!fgets(line, sizeof(line), f)) | |
259 | break; | |
260 | ||
261 | truncate_nl(line); | |
262 | ||
263 | p = strchr(line, ':'); | |
264 | if (!p) | |
265 | continue; | |
266 | ||
267 | if (strlen(p) < 37) | |
268 | continue; | |
269 | ||
270 | p += 37; | |
271 | p += strspn(p, WHITESPACE); | |
272 | p += strcspn(p, WHITESPACE); /* skip one more word */ | |
273 | p += strspn(p, WHITESPACE); | |
274 | ||
275 | if (*p != '/') | |
276 | continue; | |
277 | ||
278 | s = strdup(p); | |
279 | if (!s) | |
280 | goto fail; | |
281 | ||
282 | path_kill_slashes(s); | |
283 | ||
284 | k = set_consume(unix_sockets, s); | |
285 | if (k < 0 && k != -EEXIST) | |
286 | goto fail; | |
287 | } | |
288 | ||
289 | return; | |
290 | ||
291 | fail: | |
292 | set_free_free(unix_sockets); | |
293 | unix_sockets = NULL; | |
294 | } | |
295 | ||
296 | static bool unix_socket_alive(const char *fn) { | |
297 | assert(fn); | |
298 | ||
299 | load_unix_sockets(); | |
300 | ||
301 | if (unix_sockets) | |
302 | return !!set_get(unix_sockets, (char*) fn); | |
303 | ||
304 | /* We don't know, so assume yes */ | |
305 | return true; | |
306 | } | |
307 | ||
308 | static int dir_is_mount_point(DIR *d, const char *subdir) { | |
309 | ||
310 | union file_handle_union h = FILE_HANDLE_INIT; | |
311 | int mount_id_parent, mount_id; | |
312 | int r_p, r; | |
313 | ||
314 | r_p = name_to_handle_at(dirfd(d), ".", &h.handle, &mount_id_parent, 0); | |
315 | if (r_p < 0) | |
316 | r_p = -errno; | |
317 | ||
318 | h.handle.handle_bytes = MAX_HANDLE_SZ; | |
319 | r = name_to_handle_at(dirfd(d), subdir, &h.handle, &mount_id, 0); | |
320 | if (r < 0) | |
321 | r = -errno; | |
322 | ||
323 | /* got no handle; make no assumptions, return error */ | |
324 | if (r_p < 0 && r < 0) | |
325 | return r_p; | |
326 | ||
327 | /* got both handles; if they differ, it is a mount point */ | |
328 | if (r_p >= 0 && r >= 0) | |
329 | return mount_id_parent != mount_id; | |
330 | ||
331 | /* got only one handle; assume different mount points if one | |
332 | * of both queries was not supported by the filesystem */ | |
333 | if (r_p == -ENOSYS || r_p == -EOPNOTSUPP || r == -ENOSYS || r == -EOPNOTSUPP) | |
334 | return true; | |
335 | ||
336 | /* return error */ | |
337 | if (r_p < 0) | |
338 | return r_p; | |
339 | return r; | |
340 | } | |
341 | ||
342 | static DIR* xopendirat_nomod(int dirfd, const char *path) { | |
343 | DIR *dir; | |
344 | ||
345 | dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME); | |
346 | if (dir) | |
347 | return dir; | |
348 | ||
349 | log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path); | |
350 | if (errno != EPERM) | |
351 | return NULL; | |
352 | ||
353 | dir = xopendirat(dirfd, path, O_NOFOLLOW); | |
354 | if (!dir) | |
355 | log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path); | |
356 | ||
357 | return dir; | |
358 | } | |
359 | ||
360 | static DIR* opendir_nomod(const char *path) { | |
361 | return xopendirat_nomod(AT_FDCWD, path); | |
362 | } | |
363 | ||
364 | static int dir_cleanup( | |
365 | Item *i, | |
366 | const char *p, | |
367 | DIR *d, | |
368 | const struct stat *ds, | |
369 | usec_t cutoff, | |
370 | dev_t rootdev, | |
371 | bool mountpoint, | |
372 | int maxdepth, | |
373 | bool keep_this_level) { | |
374 | ||
375 | struct dirent *dent; | |
376 | struct timespec times[2]; | |
377 | bool deleted = false; | |
378 | int r = 0; | |
379 | ||
380 | while ((dent = readdir(d))) { | |
381 | struct stat s; | |
382 | usec_t age; | |
383 | _cleanup_free_ char *sub_path = NULL; | |
384 | ||
385 | if (STR_IN_SET(dent->d_name, ".", "..")) | |
386 | continue; | |
387 | ||
388 | if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) { | |
389 | if (errno == ENOENT) | |
390 | continue; | |
391 | ||
392 | /* FUSE, NFS mounts, SELinux might return EACCES */ | |
393 | if (errno == EACCES) | |
394 | log_debug_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name); | |
395 | else | |
396 | log_error_errno(errno, "stat(%s/%s) failed: %m", p, dent->d_name); | |
397 | r = -errno; | |
398 | continue; | |
399 | } | |
400 | ||
401 | /* Stay on the same filesystem */ | |
402 | if (s.st_dev != rootdev) { | |
403 | log_debug("Ignoring \"%s/%s\": different filesystem.", p, dent->d_name); | |
404 | continue; | |
405 | } | |
406 | ||
407 | /* Try to detect bind mounts of the same filesystem instance; they | |
408 | * do not differ in device major/minors. This type of query is not | |
409 | * supported on all kernels or filesystem types though. */ | |
410 | if (S_ISDIR(s.st_mode) && dir_is_mount_point(d, dent->d_name) > 0) { | |
411 | log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.", | |
412 | p, dent->d_name); | |
413 | continue; | |
414 | } | |
415 | ||
416 | /* Do not delete read-only files owned by root */ | |
417 | if (s.st_uid == 0 && !(s.st_mode & S_IWUSR)) { | |
418 | log_debug("Ignoring \"%s/%s\": read-only and owner by root.", p, dent->d_name); | |
419 | continue; | |
420 | } | |
421 | ||
422 | sub_path = strjoin(p, "/", dent->d_name, NULL); | |
423 | if (!sub_path) { | |
424 | r = log_oom(); | |
425 | goto finish; | |
426 | } | |
427 | ||
428 | /* Is there an item configured for this path? */ | |
429 | if (ordered_hashmap_get(items, sub_path)) { | |
430 | log_debug("Ignoring \"%s\": a separate entry exists.", sub_path); | |
431 | continue; | |
432 | } | |
433 | ||
434 | if (find_glob(globs, sub_path)) { | |
435 | log_debug("Ignoring \"%s\": a separate glob exists.", sub_path); | |
436 | continue; | |
437 | } | |
438 | ||
439 | if (S_ISDIR(s.st_mode)) { | |
440 | ||
441 | if (mountpoint && | |
442 | streq(dent->d_name, "lost+found") && | |
443 | s.st_uid == 0) { | |
444 | log_debug("Ignoring \"%s\".", sub_path); | |
445 | continue; | |
446 | } | |
447 | ||
448 | if (maxdepth <= 0) | |
449 | log_warning("Reached max depth on \"%s\".", sub_path); | |
450 | else { | |
451 | _cleanup_closedir_ DIR *sub_dir; | |
452 | int q; | |
453 | ||
454 | sub_dir = xopendirat_nomod(dirfd(d), dent->d_name); | |
455 | if (!sub_dir) { | |
456 | if (errno != ENOENT) | |
457 | r = log_error_errno(errno, "opendir(%s) failed: %m", sub_path); | |
458 | ||
459 | continue; | |
460 | } | |
461 | ||
462 | q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false); | |
463 | if (q < 0) | |
464 | r = q; | |
465 | } | |
466 | ||
467 | /* Note: if you are wondering why we don't | |
468 | * support the sticky bit for excluding | |
469 | * directories from cleaning like we do it for | |
470 | * other file system objects: well, the sticky | |
471 | * bit already has a meaning for directories, | |
472 | * so we don't want to overload that. */ | |
473 | ||
474 | if (keep_this_level) { | |
475 | log_debug("Keeping \"%s\".", sub_path); | |
476 | continue; | |
477 | } | |
478 | ||
479 | /* Ignore ctime, we change it when deleting */ | |
480 | age = timespec_load(&s.st_mtim); | |
481 | if (age >= cutoff) { | |
482 | char a[FORMAT_TIMESTAMP_MAX]; | |
483 | /* Follows spelling in stat(1). */ | |
484 | log_debug("Directory \"%s\": modify time %s is too new.", | |
485 | sub_path, | |
486 | format_timestamp_us(a, sizeof(a), age)); | |
487 | continue; | |
488 | } | |
489 | ||
490 | age = timespec_load(&s.st_atim); | |
491 | if (age >= cutoff) { | |
492 | char a[FORMAT_TIMESTAMP_MAX]; | |
493 | log_debug("Directory \"%s\": access time %s is too new.", | |
494 | sub_path, | |
495 | format_timestamp_us(a, sizeof(a), age)); | |
496 | continue; | |
497 | } | |
498 | ||
499 | log_debug("Removing directory \"%s\".", sub_path); | |
500 | if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) | |
501 | if (errno != ENOENT && errno != ENOTEMPTY) { | |
502 | log_error_errno(errno, "rmdir(%s): %m", sub_path); | |
503 | r = -errno; | |
504 | } | |
505 | ||
506 | } else { | |
507 | /* Skip files for which the sticky bit is | |
508 | * set. These are semantics we define, and are | |
509 | * unknown elsewhere. See XDG_RUNTIME_DIR | |
510 | * specification for details. */ | |
511 | if (s.st_mode & S_ISVTX) { | |
512 | log_debug("Skipping \"%s\": sticky bit set.", sub_path); | |
513 | continue; | |
514 | } | |
515 | ||
516 | if (mountpoint && S_ISREG(s.st_mode)) | |
517 | if (s.st_uid == 0 && STR_IN_SET(dent->d_name, | |
518 | ".journal", | |
519 | "aquota.user", | |
520 | "aquota.group")) { | |
521 | log_debug("Skipping \"%s\".", sub_path); | |
522 | continue; | |
523 | } | |
524 | ||
525 | /* Ignore sockets that are listed in /proc/net/unix */ | |
526 | if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) { | |
527 | log_debug("Skipping \"%s\": live socket.", sub_path); | |
528 | continue; | |
529 | } | |
530 | ||
531 | /* Ignore device nodes */ | |
532 | if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) { | |
533 | log_debug("Skipping \"%s\": a device.", sub_path); | |
534 | continue; | |
535 | } | |
536 | ||
537 | /* Keep files on this level around if this is | |
538 | * requested */ | |
539 | if (keep_this_level) { | |
540 | log_debug("Keeping \"%s\".", sub_path); | |
541 | continue; | |
542 | } | |
543 | ||
544 | age = timespec_load(&s.st_mtim); | |
545 | if (age >= cutoff) { | |
546 | char a[FORMAT_TIMESTAMP_MAX]; | |
547 | /* Follows spelling in stat(1). */ | |
548 | log_debug("File \"%s\": modify time %s is too new.", | |
549 | sub_path, | |
550 | format_timestamp_us(a, sizeof(a), age)); | |
551 | continue; | |
552 | } | |
553 | ||
554 | age = timespec_load(&s.st_atim); | |
555 | if (age >= cutoff) { | |
556 | char a[FORMAT_TIMESTAMP_MAX]; | |
557 | log_debug("File \"%s\": access time %s is too new.", | |
558 | sub_path, | |
559 | format_timestamp_us(a, sizeof(a), age)); | |
560 | continue; | |
561 | } | |
562 | ||
563 | age = timespec_load(&s.st_ctim); | |
564 | if (age >= cutoff) { | |
565 | char a[FORMAT_TIMESTAMP_MAX]; | |
566 | log_debug("File \"%s\": change time %s is too new.", | |
567 | sub_path, | |
568 | format_timestamp_us(a, sizeof(a), age)); | |
569 | continue; | |
570 | } | |
571 | ||
572 | log_debug("unlink \"%s\"", sub_path); | |
573 | ||
574 | if (unlinkat(dirfd(d), dent->d_name, 0) < 0) | |
575 | if (errno != ENOENT) | |
576 | r = log_error_errno(errno, "unlink(%s): %m", sub_path); | |
577 | ||
578 | deleted = true; | |
579 | } | |
580 | } | |
581 | ||
582 | finish: | |
583 | if (deleted) { | |
584 | usec_t age1, age2; | |
585 | char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX]; | |
586 | ||
587 | /* Restore original directory timestamps */ | |
588 | times[0] = ds->st_atim; | |
589 | times[1] = ds->st_mtim; | |
590 | ||
591 | age1 = timespec_load(&ds->st_atim); | |
592 | age2 = timespec_load(&ds->st_mtim); | |
593 | log_debug("Restoring access and modification time on \"%s\": %s, %s", | |
594 | p, | |
595 | format_timestamp_us(a, sizeof(a), age1), | |
596 | format_timestamp_us(b, sizeof(b), age2)); | |
597 | if (futimens(dirfd(d), times) < 0) | |
598 | log_error_errno(errno, "utimensat(%s): %m", p); | |
599 | } | |
600 | ||
601 | return r; | |
602 | } | |
603 | ||
604 | static int path_set_perms(Item *i, const char *path) { | |
605 | _cleanup_close_ int fd = -1; | |
606 | struct stat st; | |
607 | ||
608 | assert(i); | |
609 | assert(path); | |
610 | ||
611 | /* We open the file with O_PATH here, to make the operation | |
612 | * somewhat atomic. Also there's unfortunately no fchmodat() | |
613 | * with AT_SYMLINK_NOFOLLOW, hence we emulate it here via | |
614 | * O_PATH. */ | |
615 | ||
616 | fd = open(path, O_NOFOLLOW|O_CLOEXEC|O_PATH); | |
617 | if (fd < 0) | |
618 | return log_error_errno(errno, "Adjusting owner and mode for %s failed: %m", path); | |
619 | ||
620 | if (fstatat(fd, "", &st, AT_EMPTY_PATH) < 0) | |
621 | return log_error_errno(errno, "Failed to fstat() file %s: %m", path); | |
622 | ||
623 | if (S_ISLNK(st.st_mode)) | |
624 | log_debug("Skipping mode an owner fix for symlink %s.", path); | |
625 | else { | |
626 | char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)]; | |
627 | xsprintf(fn, "/proc/self/fd/%i", fd); | |
628 | ||
629 | /* not using i->path directly because it may be a glob */ | |
630 | if (i->mode_set) { | |
631 | mode_t m = i->mode; | |
632 | ||
633 | if (i->mask_perms) { | |
634 | if (!(st.st_mode & 0111)) | |
635 | m &= ~0111; | |
636 | if (!(st.st_mode & 0222)) | |
637 | m &= ~0222; | |
638 | if (!(st.st_mode & 0444)) | |
639 | m &= ~0444; | |
640 | if (!S_ISDIR(st.st_mode)) | |
641 | m &= ~07000; /* remove sticky/sgid/suid bit, unless directory */ | |
642 | } | |
643 | ||
644 | if (m == (st.st_mode & 07777)) | |
645 | log_debug("\"%s\" has right mode %o", path, st.st_mode); | |
646 | else { | |
647 | log_debug("chmod \"%s\" to mode %o", path, m); | |
648 | if (chmod(fn, m) < 0) | |
649 | return log_error_errno(errno, "chmod(%s) failed: %m", path); | |
650 | } | |
651 | } | |
652 | ||
653 | if ((i->uid != st.st_uid || i->gid != st.st_gid) && | |
654 | (i->uid_set || i->gid_set)) { | |
655 | log_debug("chown \"%s\" to "UID_FMT"."GID_FMT, | |
656 | path, | |
657 | i->uid_set ? i->uid : UID_INVALID, | |
658 | i->gid_set ? i->gid : GID_INVALID); | |
659 | if (chown(fn, | |
660 | i->uid_set ? i->uid : UID_INVALID, | |
661 | i->gid_set ? i->gid : GID_INVALID) < 0) | |
662 | return log_error_errno(errno, "chown(%s) failed: %m", path); | |
663 | } | |
664 | } | |
665 | ||
666 | fd = safe_close(fd); | |
667 | ||
668 | return label_fix(path, false, false); | |
669 | } | |
670 | ||
671 | static int parse_xattrs_from_arg(Item *i) { | |
672 | const char *p; | |
673 | int r; | |
674 | ||
675 | assert(i); | |
676 | assert(i->argument); | |
677 | ||
678 | p = i->argument; | |
679 | ||
680 | for (;;) { | |
681 | _cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL, *xattr_replaced = NULL; | |
682 | ||
683 | r = extract_first_word(&p, &xattr, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE); | |
684 | if (r < 0) | |
685 | log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p); | |
686 | if (r <= 0) | |
687 | break; | |
688 | ||
689 | r = specifier_printf(xattr, specifier_table, NULL, &xattr_replaced); | |
690 | if (r < 0) | |
691 | return log_error_errno(r, "Failed to replace specifiers in extended attribute '%s': %m", xattr); | |
692 | ||
693 | r = split_pair(xattr_replaced, "=", &name, &value); | |
694 | if (r < 0) { | |
695 | log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr); | |
696 | continue; | |
697 | } | |
698 | ||
699 | if (isempty(name) || isempty(value)) { | |
700 | log_warning("Malformed extended attribute found, ignoring: %s", xattr); | |
701 | continue; | |
702 | } | |
703 | ||
704 | if (strv_push_pair(&i->xattrs, name, value) < 0) | |
705 | return log_oom(); | |
706 | ||
707 | name = value = NULL; | |
708 | } | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | static int path_set_xattrs(Item *i, const char *path) { | |
714 | char **name, **value; | |
715 | ||
716 | assert(i); | |
717 | assert(path); | |
718 | ||
719 | STRV_FOREACH_PAIR(name, value, i->xattrs) { | |
720 | int n; | |
721 | ||
722 | n = strlen(*value); | |
723 | log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path); | |
724 | if (lsetxattr(path, *name, *value, n, 0) < 0) { | |
725 | log_error("Setting extended attribute %s=%s on %s failed: %m", *name, *value, path); | |
726 | return -errno; | |
727 | } | |
728 | } | |
729 | return 0; | |
730 | } | |
731 | ||
732 | static int parse_acls_from_arg(Item *item) { | |
733 | #ifdef HAVE_ACL | |
734 | int r; | |
735 | ||
736 | assert(item); | |
737 | ||
738 | /* If force (= modify) is set, we will not modify the acl | |
739 | * afterwards, so the mask can be added now if necessary. */ | |
740 | ||
741 | r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force); | |
742 | if (r < 0) | |
743 | log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument); | |
744 | #else | |
745 | log_warning_errno(ENOSYS, "ACLs are not supported. Ignoring"); | |
746 | #endif | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
751 | #ifdef HAVE_ACL | |
752 | static int path_set_acl(const char *path, const char *pretty, acl_type_t type, acl_t acl, bool modify) { | |
753 | _cleanup_(acl_free_charpp) char *t = NULL; | |
754 | _cleanup_(acl_freep) acl_t dup = NULL; | |
755 | int r; | |
756 | ||
757 | /* Returns 0 for success, positive error if already warned, | |
758 | * negative error otherwise. */ | |
759 | ||
760 | if (modify) { | |
761 | r = acls_for_file(path, type, acl, &dup); | |
762 | if (r < 0) | |
763 | return r; | |
764 | ||
765 | r = calc_acl_mask_if_needed(&dup); | |
766 | if (r < 0) | |
767 | return r; | |
768 | } else { | |
769 | dup = acl_dup(acl); | |
770 | if (!dup) | |
771 | return -errno; | |
772 | ||
773 | /* the mask was already added earlier if needed */ | |
774 | } | |
775 | ||
776 | r = add_base_acls_if_needed(&dup, path); | |
777 | if (r < 0) | |
778 | return r; | |
779 | ||
780 | t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE); | |
781 | log_debug("Setting %s ACL %s on %s.", | |
782 | type == ACL_TYPE_ACCESS ? "access" : "default", | |
783 | strna(t), pretty); | |
784 | ||
785 | r = acl_set_file(path, type, dup); | |
786 | if (r < 0) | |
787 | /* Return positive to indicate we already warned */ | |
788 | return -log_error_errno(errno, | |
789 | "Setting %s ACL \"%s\" on %s failed: %m", | |
790 | type == ACL_TYPE_ACCESS ? "access" : "default", | |
791 | strna(t), pretty); | |
792 | ||
793 | return 0; | |
794 | } | |
795 | #endif | |
796 | ||
797 | static int path_set_acls(Item *item, const char *path) { | |
798 | int r = 0; | |
799 | #ifdef HAVE_ACL | |
800 | char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int)]; | |
801 | _cleanup_close_ int fd = -1; | |
802 | struct stat st; | |
803 | ||
804 | assert(item); | |
805 | assert(path); | |
806 | ||
807 | fd = open(path, O_NOFOLLOW|O_CLOEXEC|O_PATH); | |
808 | if (fd < 0) | |
809 | return log_error_errno(errno, "Adjusting ACL of %s failed: %m", path); | |
810 | ||
811 | if (fstatat(fd, "", &st, AT_EMPTY_PATH) < 0) | |
812 | return log_error_errno(errno, "Failed to fstat() file %s: %m", path); | |
813 | ||
814 | if (S_ISLNK(st.st_mode)) { | |
815 | log_debug("Skipping ACL fix for symlink %s.", path); | |
816 | return 0; | |
817 | } | |
818 | ||
819 | xsprintf(fn, "/proc/self/fd/%i", fd); | |
820 | ||
821 | if (item->acl_access) | |
822 | r = path_set_acl(fn, path, ACL_TYPE_ACCESS, item->acl_access, item->force); | |
823 | ||
824 | if (r == 0 && item->acl_default) | |
825 | r = path_set_acl(fn, path, ACL_TYPE_DEFAULT, item->acl_default, item->force); | |
826 | ||
827 | if (r > 0) | |
828 | return -r; /* already warned */ | |
829 | else if (r == -EOPNOTSUPP) { | |
830 | log_debug_errno(r, "ACLs not supported by file system at %s", path); | |
831 | return 0; | |
832 | } else if (r < 0) | |
833 | log_error_errno(r, "ACL operation on \"%s\" failed: %m", path); | |
834 | #endif | |
835 | return r; | |
836 | } | |
837 | ||
838 | #define ATTRIBUTES_ALL \ | |
839 | (FS_NOATIME_FL | \ | |
840 | FS_SYNC_FL | \ | |
841 | FS_DIRSYNC_FL | \ | |
842 | FS_APPEND_FL | \ | |
843 | FS_COMPR_FL | \ | |
844 | FS_NODUMP_FL | \ | |
845 | FS_EXTENT_FL | \ | |
846 | FS_IMMUTABLE_FL | \ | |
847 | FS_JOURNAL_DATA_FL | \ | |
848 | FS_SECRM_FL | \ | |
849 | FS_UNRM_FL | \ | |
850 | FS_NOTAIL_FL | \ | |
851 | FS_TOPDIR_FL | \ | |
852 | FS_NOCOW_FL) | |
853 | ||
854 | static int parse_attribute_from_arg(Item *item) { | |
855 | ||
856 | static const struct { | |
857 | char character; | |
858 | unsigned value; | |
859 | } attributes[] = { | |
860 | { 'A', FS_NOATIME_FL }, /* do not update atime */ | |
861 | { 'S', FS_SYNC_FL }, /* Synchronous updates */ | |
862 | { 'D', FS_DIRSYNC_FL }, /* dirsync behaviour (directories only) */ | |
863 | { 'a', FS_APPEND_FL }, /* writes to file may only append */ | |
864 | { 'c', FS_COMPR_FL }, /* Compress file */ | |
865 | { 'd', FS_NODUMP_FL }, /* do not dump file */ | |
866 | { 'e', FS_EXTENT_FL }, /* Top of directory hierarchies*/ | |
867 | { 'i', FS_IMMUTABLE_FL }, /* Immutable file */ | |
868 | { 'j', FS_JOURNAL_DATA_FL }, /* Reserved for ext3 */ | |
869 | { 's', FS_SECRM_FL }, /* Secure deletion */ | |
870 | { 'u', FS_UNRM_FL }, /* Undelete */ | |
871 | { 't', FS_NOTAIL_FL }, /* file tail should not be merged */ | |
872 | { 'T', FS_TOPDIR_FL }, /* Top of directory hierarchies*/ | |
873 | { 'C', FS_NOCOW_FL }, /* Do not cow file */ | |
874 | }; | |
875 | ||
876 | enum { | |
877 | MODE_ADD, | |
878 | MODE_DEL, | |
879 | MODE_SET | |
880 | } mode = MODE_ADD; | |
881 | ||
882 | unsigned value = 0, mask = 0; | |
883 | const char *p; | |
884 | ||
885 | assert(item); | |
886 | ||
887 | p = item->argument; | |
888 | if (p) { | |
889 | if (*p == '+') { | |
890 | mode = MODE_ADD; | |
891 | p++; | |
892 | } else if (*p == '-') { | |
893 | mode = MODE_DEL; | |
894 | p++; | |
895 | } else if (*p == '=') { | |
896 | mode = MODE_SET; | |
897 | p++; | |
898 | } | |
899 | } | |
900 | ||
901 | if (isempty(p) && mode != MODE_SET) { | |
902 | log_error("Setting file attribute on '%s' needs an attribute specification.", item->path); | |
903 | return -EINVAL; | |
904 | } | |
905 | ||
906 | for (; p && *p ; p++) { | |
907 | unsigned i, v; | |
908 | ||
909 | for (i = 0; i < ELEMENTSOF(attributes); i++) | |
910 | if (*p == attributes[i].character) | |
911 | break; | |
912 | ||
913 | if (i >= ELEMENTSOF(attributes)) { | |
914 | log_error("Unknown file attribute '%c' on '%s'.", *p, item->path); | |
915 | return -EINVAL; | |
916 | } | |
917 | ||
918 | v = attributes[i].value; | |
919 | ||
920 | SET_FLAG(value, v, (mode == MODE_ADD || mode == MODE_SET)); | |
921 | ||
922 | mask |= v; | |
923 | } | |
924 | ||
925 | if (mode == MODE_SET) | |
926 | mask |= ATTRIBUTES_ALL; | |
927 | ||
928 | assert(mask != 0); | |
929 | ||
930 | item->attribute_mask = mask; | |
931 | item->attribute_value = value; | |
932 | item->attribute_set = true; | |
933 | ||
934 | return 0; | |
935 | } | |
936 | ||
937 | static int path_set_attribute(Item *item, const char *path) { | |
938 | _cleanup_close_ int fd = -1; | |
939 | struct stat st; | |
940 | unsigned f; | |
941 | int r; | |
942 | ||
943 | if (!item->attribute_set || item->attribute_mask == 0) | |
944 | return 0; | |
945 | ||
946 | fd = open(path, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOATIME|O_NOFOLLOW); | |
947 | if (fd < 0) { | |
948 | if (errno == ELOOP) | |
949 | return log_error_errno(errno, "Skipping file attributes adjustment on symlink %s.", path); | |
950 | ||
951 | return log_error_errno(errno, "Cannot open '%s': %m", path); | |
952 | } | |
953 | ||
954 | if (fstat(fd, &st) < 0) | |
955 | return log_error_errno(errno, "Cannot stat '%s': %m", path); | |
956 | ||
957 | /* Issuing the file attribute ioctls on device nodes is not | |
958 | * safe, as that will be delivered to the drivers, not the | |
959 | * file system containing the device node. */ | |
960 | if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode)) { | |
961 | log_error("Setting file flags is only supported on regular files and directories, cannot set on '%s'.", path); | |
962 | return -EINVAL; | |
963 | } | |
964 | ||
965 | f = item->attribute_value & item->attribute_mask; | |
966 | ||
967 | /* Mask away directory-specific flags */ | |
968 | if (!S_ISDIR(st.st_mode)) | |
969 | f &= ~FS_DIRSYNC_FL; | |
970 | ||
971 | r = chattr_fd(fd, f, item->attribute_mask); | |
972 | if (r < 0) | |
973 | log_full_errno(r == -ENOTTY ? LOG_DEBUG : LOG_WARNING, | |
974 | r, | |
975 | "Cannot set file attribute for '%s', value=0x%08x, mask=0x%08x: %m", | |
976 | path, item->attribute_value, item->attribute_mask); | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
981 | static int write_one_file(Item *i, const char *path) { | |
982 | _cleanup_close_ int fd = -1; | |
983 | int flags, r = 0; | |
984 | struct stat st; | |
985 | ||
986 | assert(i); | |
987 | assert(path); | |
988 | ||
989 | flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND|O_NOFOLLOW : | |
990 | i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC|O_NOFOLLOW : 0; | |
991 | ||
992 | RUN_WITH_UMASK(0000) { | |
993 | mac_selinux_create_file_prepare(path, S_IFREG); | |
994 | fd = open(path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode); | |
995 | mac_selinux_create_file_clear(); | |
996 | } | |
997 | ||
998 | if (fd < 0) { | |
999 | if (i->type == WRITE_FILE && errno == ENOENT) { | |
1000 | log_debug_errno(errno, "Not writing \"%s\": %m", path); | |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | r = -errno; | |
1005 | if (!i->argument && errno == EROFS && stat(path, &st) == 0 && | |
1006 | (i->type == CREATE_FILE || st.st_size == 0)) | |
1007 | goto check_mode; | |
1008 | ||
1009 | return log_error_errno(r, "Failed to create file %s: %m", path); | |
1010 | } | |
1011 | ||
1012 | if (i->argument) { | |
1013 | _cleanup_free_ char *unescaped = NULL, *replaced = NULL; | |
1014 | ||
1015 | log_debug("%s to \"%s\".", i->type == CREATE_FILE ? "Appending" : "Writing", path); | |
1016 | ||
1017 | r = cunescape(i->argument, 0, &unescaped); | |
1018 | if (r < 0) | |
1019 | return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument); | |
1020 | ||
1021 | r = specifier_printf(unescaped, specifier_table, NULL, &replaced); | |
1022 | if (r < 0) | |
1023 | return log_error_errno(r, "Failed to replace specifiers in parameter to write '%s': %m", unescaped); | |
1024 | ||
1025 | r = loop_write(fd, replaced, strlen(replaced), false); | |
1026 | if (r < 0) | |
1027 | return log_error_errno(r, "Failed to write file \"%s\": %m", path); | |
1028 | } else | |
1029 | log_debug("\"%s\" has been created.", path); | |
1030 | ||
1031 | fd = safe_close(fd); | |
1032 | ||
1033 | if (stat(path, &st) < 0) | |
1034 | return log_error_errno(errno, "stat(%s) failed: %m", path); | |
1035 | ||
1036 | check_mode: | |
1037 | if (!S_ISREG(st.st_mode)) { | |
1038 | log_error("%s is not a file.", path); | |
1039 | return -EEXIST; | |
1040 | } | |
1041 | ||
1042 | r = path_set_perms(i, path); | |
1043 | if (r < 0) | |
1044 | return r; | |
1045 | ||
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | typedef int (*action_t)(Item *, const char *); | |
1050 | ||
1051 | static int item_do_children(Item *i, const char *path, action_t action) { | |
1052 | _cleanup_closedir_ DIR *d; | |
1053 | int r = 0; | |
1054 | ||
1055 | assert(i); | |
1056 | assert(path); | |
1057 | ||
1058 | /* This returns the first error we run into, but nevertheless | |
1059 | * tries to go on */ | |
1060 | ||
1061 | d = opendir_nomod(path); | |
1062 | if (!d) | |
1063 | return errno == ENOENT || errno == ENOTDIR ? 0 : -errno; | |
1064 | ||
1065 | for (;;) { | |
1066 | _cleanup_free_ char *p = NULL; | |
1067 | struct dirent *de; | |
1068 | int q; | |
1069 | ||
1070 | errno = 0; | |
1071 | de = readdir(d); | |
1072 | if (!de) { | |
1073 | if (errno > 0 && r == 0) | |
1074 | r = -errno; | |
1075 | ||
1076 | break; | |
1077 | } | |
1078 | ||
1079 | if (STR_IN_SET(de->d_name, ".", "..")) | |
1080 | continue; | |
1081 | ||
1082 | p = strjoin(path, "/", de->d_name, NULL); | |
1083 | if (!p) | |
1084 | return -ENOMEM; | |
1085 | ||
1086 | q = action(i, p); | |
1087 | if (q < 0 && q != -ENOENT && r == 0) | |
1088 | r = q; | |
1089 | ||
1090 | if (IN_SET(de->d_type, DT_UNKNOWN, DT_DIR)) { | |
1091 | q = item_do_children(i, p, action); | |
1092 | if (q < 0 && r == 0) | |
1093 | r = q; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return r; | |
1098 | } | |
1099 | ||
1100 | static int glob_item(Item *i, action_t action, bool recursive) { | |
1101 | _cleanup_globfree_ glob_t g = { | |
1102 | .gl_closedir = (void (*)(void *)) closedir, | |
1103 | .gl_readdir = (struct dirent *(*)(void *)) readdir, | |
1104 | .gl_opendir = (void *(*)(const char *)) opendir_nomod, | |
1105 | .gl_lstat = lstat, | |
1106 | .gl_stat = stat, | |
1107 | }; | |
1108 | int r = 0, k; | |
1109 | char **fn; | |
1110 | ||
1111 | errno = 0; | |
1112 | k = glob(i->path, GLOB_NOSORT|GLOB_BRACE|GLOB_ALTDIRFUNC, NULL, &g); | |
1113 | if (k != 0 && k != GLOB_NOMATCH) | |
1114 | return log_error_errno(errno ?: EIO, "glob(%s) failed: %m", i->path); | |
1115 | ||
1116 | STRV_FOREACH(fn, g.gl_pathv) { | |
1117 | k = action(i, *fn); | |
1118 | if (k < 0 && r == 0) | |
1119 | r = k; | |
1120 | ||
1121 | if (recursive) { | |
1122 | k = item_do_children(i, *fn, action); | |
1123 | if (k < 0 && r == 0) | |
1124 | r = k; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | return r; | |
1129 | } | |
1130 | ||
1131 | typedef enum { | |
1132 | CREATION_NORMAL, | |
1133 | CREATION_EXISTING, | |
1134 | CREATION_FORCE, | |
1135 | _CREATION_MODE_MAX, | |
1136 | _CREATION_MODE_INVALID = -1 | |
1137 | } CreationMode; | |
1138 | ||
1139 | static const char *creation_mode_verb_table[_CREATION_MODE_MAX] = { | |
1140 | [CREATION_NORMAL] = "Created", | |
1141 | [CREATION_EXISTING] = "Found existing", | |
1142 | [CREATION_FORCE] = "Created replacement", | |
1143 | }; | |
1144 | ||
1145 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode); | |
1146 | ||
1147 | static int create_item(Item *i) { | |
1148 | _cleanup_free_ char *resolved = NULL; | |
1149 | struct stat st; | |
1150 | int r = 0; | |
1151 | int q = 0; | |
1152 | CreationMode creation; | |
1153 | ||
1154 | assert(i); | |
1155 | ||
1156 | log_debug("Running create action for entry %c %s", (char) i->type, i->path); | |
1157 | ||
1158 | switch (i->type) { | |
1159 | ||
1160 | case IGNORE_PATH: | |
1161 | case IGNORE_DIRECTORY_PATH: | |
1162 | case REMOVE_PATH: | |
1163 | case RECURSIVE_REMOVE_PATH: | |
1164 | return 0; | |
1165 | ||
1166 | case CREATE_FILE: | |
1167 | case TRUNCATE_FILE: | |
1168 | r = write_one_file(i, i->path); | |
1169 | if (r < 0) | |
1170 | return r; | |
1171 | break; | |
1172 | ||
1173 | case COPY_FILES: { | |
1174 | r = specifier_printf(i->argument, specifier_table, NULL, &resolved); | |
1175 | if (r < 0) | |
1176 | return log_error_errno(r, "Failed to substitute specifiers in copy source %s: %m", i->argument); | |
1177 | ||
1178 | log_debug("Copying tree \"%s\" to \"%s\".", resolved, i->path); | |
1179 | r = copy_tree(resolved, i->path, false); | |
1180 | ||
1181 | if (r == -EROFS && stat(i->path, &st) == 0) | |
1182 | r = -EEXIST; | |
1183 | ||
1184 | if (r < 0) { | |
1185 | struct stat a, b; | |
1186 | ||
1187 | if (r != -EEXIST) | |
1188 | return log_error_errno(r, "Failed to copy files to %s: %m", i->path); | |
1189 | ||
1190 | if (stat(resolved, &a) < 0) | |
1191 | return log_error_errno(errno, "stat(%s) failed: %m", resolved); | |
1192 | ||
1193 | if (stat(i->path, &b) < 0) | |
1194 | return log_error_errno(errno, "stat(%s) failed: %m", i->path); | |
1195 | ||
1196 | if ((a.st_mode ^ b.st_mode) & S_IFMT) { | |
1197 | log_debug("Can't copy to %s, file exists already and is of different type", i->path); | |
1198 | return 0; | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | r = path_set_perms(i, i->path); | |
1203 | if (r < 0) | |
1204 | return r; | |
1205 | ||
1206 | break; | |
1207 | ||
1208 | case WRITE_FILE: | |
1209 | r = glob_item(i, write_one_file, false); | |
1210 | if (r < 0) | |
1211 | return r; | |
1212 | ||
1213 | break; | |
1214 | ||
1215 | case CREATE_DIRECTORY: | |
1216 | case TRUNCATE_DIRECTORY: | |
1217 | case CREATE_SUBVOLUME: | |
1218 | case CREATE_SUBVOLUME_INHERIT_QUOTA: | |
1219 | case CREATE_SUBVOLUME_NEW_QUOTA: | |
1220 | ||
1221 | RUN_WITH_UMASK(0000) | |
1222 | mkdir_parents_label(i->path, 0755); | |
1223 | ||
1224 | if (IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) { | |
1225 | ||
1226 | if (btrfs_is_subvol(isempty(arg_root) ? "/" : arg_root) <= 0) | |
1227 | ||
1228 | /* Don't create a subvolume unless the | |
1229 | * root directory is one, too. We do | |
1230 | * this under the assumption that if | |
1231 | * the root directory is just a plain | |
1232 | * directory (i.e. very light-weight), | |
1233 | * we shouldn't try to split it up | |
1234 | * into subvolumes (i.e. more | |
1235 | * heavy-weight). Thus, chroot() | |
1236 | * environments and suchlike will get | |
1237 | * a full brtfs subvolume set up below | |
1238 | * their tree only if they | |
1239 | * specifically set up a btrfs | |
1240 | * subvolume for the root dir too. */ | |
1241 | ||
1242 | r = -ENOTTY; | |
1243 | else { | |
1244 | RUN_WITH_UMASK((~i->mode) & 0777) | |
1245 | r = btrfs_subvol_make(i->path); | |
1246 | } | |
1247 | } else | |
1248 | r = 0; | |
1249 | ||
1250 | if (IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY) || r == -ENOTTY) | |
1251 | RUN_WITH_UMASK(0000) | |
1252 | r = mkdir_label(i->path, i->mode); | |
1253 | ||
1254 | if (r < 0) { | |
1255 | int k; | |
1256 | ||
1257 | if (r != -EEXIST && r != -EROFS) | |
1258 | return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", i->path); | |
1259 | ||
1260 | k = is_dir(i->path, false); | |
1261 | if (k == -ENOENT && r == -EROFS) | |
1262 | return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", i->path); | |
1263 | if (k < 0) | |
1264 | return log_error_errno(k, "Failed to check if %s exists: %m", i->path); | |
1265 | if (!k) { | |
1266 | log_warning("\"%s\" already exists and is not a directory.", i->path); | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | creation = CREATION_EXISTING; | |
1271 | } else | |
1272 | creation = CREATION_NORMAL; | |
1273 | ||
1274 | log_debug("%s directory \"%s\".", creation_mode_verb_to_string(creation), i->path); | |
1275 | ||
1276 | if (IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) { | |
1277 | r = btrfs_subvol_auto_qgroup(i->path, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA); | |
1278 | if (r == -ENOTTY) | |
1279 | log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" because of unsupported file system or because directory is not a subvolume: %m", i->path); | |
1280 | else if (r == -EROFS) | |
1281 | log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" because of read-only file system: %m", i->path); | |
1282 | else if (r == -ENOPROTOOPT) | |
1283 | log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" because quota support is disabled: %m", i->path); | |
1284 | else if (r < 0) | |
1285 | q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path); | |
1286 | else if (r > 0) | |
1287 | log_debug("Adjusted quota for subvolume \"%s\".", i->path); | |
1288 | else if (r == 0) | |
1289 | log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path); | |
1290 | } | |
1291 | ||
1292 | r = path_set_perms(i, i->path); | |
1293 | if (q < 0) | |
1294 | return q; | |
1295 | if (r < 0) | |
1296 | return r; | |
1297 | ||
1298 | break; | |
1299 | ||
1300 | case CREATE_FIFO: | |
1301 | ||
1302 | RUN_WITH_UMASK(0000) { | |
1303 | mac_selinux_create_file_prepare(i->path, S_IFIFO); | |
1304 | r = mkfifo(i->path, i->mode); | |
1305 | mac_selinux_create_file_clear(); | |
1306 | } | |
1307 | ||
1308 | if (r < 0) { | |
1309 | if (errno != EEXIST) | |
1310 | return log_error_errno(errno, "Failed to create fifo %s: %m", i->path); | |
1311 | ||
1312 | if (lstat(i->path, &st) < 0) | |
1313 | return log_error_errno(errno, "stat(%s) failed: %m", i->path); | |
1314 | ||
1315 | if (!S_ISFIFO(st.st_mode)) { | |
1316 | ||
1317 | if (i->force) { | |
1318 | RUN_WITH_UMASK(0000) { | |
1319 | mac_selinux_create_file_prepare(i->path, S_IFIFO); | |
1320 | r = mkfifo_atomic(i->path, i->mode); | |
1321 | mac_selinux_create_file_clear(); | |
1322 | } | |
1323 | ||
1324 | if (r < 0) | |
1325 | return log_error_errno(r, "Failed to create fifo %s: %m", i->path); | |
1326 | creation = CREATION_FORCE; | |
1327 | } else { | |
1328 | log_warning("\"%s\" already exists and is not a fifo.", i->path); | |
1329 | return 0; | |
1330 | } | |
1331 | } else | |
1332 | creation = CREATION_EXISTING; | |
1333 | } else | |
1334 | creation = CREATION_NORMAL; | |
1335 | log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), i->path); | |
1336 | ||
1337 | r = path_set_perms(i, i->path); | |
1338 | if (r < 0) | |
1339 | return r; | |
1340 | ||
1341 | break; | |
1342 | } | |
1343 | ||
1344 | case CREATE_SYMLINK: { | |
1345 | r = specifier_printf(i->argument, specifier_table, NULL, &resolved); | |
1346 | if (r < 0) | |
1347 | return log_error_errno(r, "Failed to substitute specifiers in symlink target %s: %m", i->argument); | |
1348 | ||
1349 | mac_selinux_create_file_prepare(i->path, S_IFLNK); | |
1350 | r = symlink(resolved, i->path); | |
1351 | mac_selinux_create_file_clear(); | |
1352 | ||
1353 | if (r < 0) { | |
1354 | _cleanup_free_ char *x = NULL; | |
1355 | ||
1356 | if (errno != EEXIST) | |
1357 | return log_error_errno(errno, "symlink(%s, %s) failed: %m", resolved, i->path); | |
1358 | ||
1359 | r = readlink_malloc(i->path, &x); | |
1360 | if (r < 0 || !streq(resolved, x)) { | |
1361 | ||
1362 | if (i->force) { | |
1363 | mac_selinux_create_file_prepare(i->path, S_IFLNK); | |
1364 | r = symlink_atomic(resolved, i->path); | |
1365 | mac_selinux_create_file_clear(); | |
1366 | ||
1367 | if (r < 0) | |
1368 | return log_error_errno(r, "symlink(%s, %s) failed: %m", resolved, i->path); | |
1369 | ||
1370 | creation = CREATION_FORCE; | |
1371 | } else { | |
1372 | log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path); | |
1373 | return 0; | |
1374 | } | |
1375 | } else | |
1376 | creation = CREATION_EXISTING; | |
1377 | } else | |
1378 | ||
1379 | creation = CREATION_NORMAL; | |
1380 | log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path); | |
1381 | break; | |
1382 | } | |
1383 | ||
1384 | case CREATE_BLOCK_DEVICE: | |
1385 | case CREATE_CHAR_DEVICE: { | |
1386 | mode_t file_type; | |
1387 | ||
1388 | if (have_effective_cap(CAP_MKNOD) == 0) { | |
1389 | /* In a container we lack CAP_MKNOD. We | |
1390 | shouldn't attempt to create the device node in | |
1391 | that case to avoid noise, and we don't support | |
1392 | virtualized devices in containers anyway. */ | |
1393 | ||
1394 | log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path); | |
1395 | return 0; | |
1396 | } | |
1397 | ||
1398 | file_type = i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR; | |
1399 | ||
1400 | RUN_WITH_UMASK(0000) { | |
1401 | mac_selinux_create_file_prepare(i->path, file_type); | |
1402 | r = mknod(i->path, i->mode | file_type, i->major_minor); | |
1403 | mac_selinux_create_file_clear(); | |
1404 | } | |
1405 | ||
1406 | if (r < 0) { | |
1407 | if (errno == EPERM) { | |
1408 | log_debug("We lack permissions, possibly because of cgroup configuration; " | |
1409 | "skipping creation of device node %s.", i->path); | |
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | if (errno != EEXIST) | |
1414 | return log_error_errno(errno, "Failed to create device node %s: %m", i->path); | |
1415 | ||
1416 | if (lstat(i->path, &st) < 0) | |
1417 | return log_error_errno(errno, "stat(%s) failed: %m", i->path); | |
1418 | ||
1419 | if ((st.st_mode & S_IFMT) != file_type) { | |
1420 | ||
1421 | if (i->force) { | |
1422 | ||
1423 | RUN_WITH_UMASK(0000) { | |
1424 | mac_selinux_create_file_prepare(i->path, file_type); | |
1425 | r = mknod_atomic(i->path, i->mode | file_type, i->major_minor); | |
1426 | mac_selinux_create_file_clear(); | |
1427 | } | |
1428 | ||
1429 | if (r < 0) | |
1430 | return log_error_errno(r, "Failed to create device node \"%s\": %m", i->path); | |
1431 | creation = CREATION_FORCE; | |
1432 | } else { | |
1433 | log_debug("%s is not a device node.", i->path); | |
1434 | return 0; | |
1435 | } | |
1436 | } else | |
1437 | creation = CREATION_EXISTING; | |
1438 | } else | |
1439 | creation = CREATION_NORMAL; | |
1440 | ||
1441 | log_debug("%s %s device node \"%s\" %u:%u.", | |
1442 | creation_mode_verb_to_string(creation), | |
1443 | i->type == CREATE_BLOCK_DEVICE ? "block" : "char", | |
1444 | i->path, major(i->mode), minor(i->mode)); | |
1445 | ||
1446 | r = path_set_perms(i, i->path); | |
1447 | if (r < 0) | |
1448 | return r; | |
1449 | ||
1450 | break; | |
1451 | } | |
1452 | ||
1453 | case ADJUST_MODE: | |
1454 | case RELABEL_PATH: | |
1455 | r = glob_item(i, path_set_perms, false); | |
1456 | if (r < 0) | |
1457 | return r; | |
1458 | break; | |
1459 | ||
1460 | case RECURSIVE_RELABEL_PATH: | |
1461 | r = glob_item(i, path_set_perms, true); | |
1462 | if (r < 0) | |
1463 | return r; | |
1464 | break; | |
1465 | ||
1466 | case SET_XATTR: | |
1467 | r = glob_item(i, path_set_xattrs, false); | |
1468 | if (r < 0) | |
1469 | return r; | |
1470 | break; | |
1471 | ||
1472 | case RECURSIVE_SET_XATTR: | |
1473 | r = glob_item(i, path_set_xattrs, true); | |
1474 | if (r < 0) | |
1475 | return r; | |
1476 | break; | |
1477 | ||
1478 | case SET_ACL: | |
1479 | r = glob_item(i, path_set_acls, false); | |
1480 | if (r < 0) | |
1481 | return r; | |
1482 | break; | |
1483 | ||
1484 | case RECURSIVE_SET_ACL: | |
1485 | r = glob_item(i, path_set_acls, true); | |
1486 | if (r < 0) | |
1487 | return r; | |
1488 | break; | |
1489 | ||
1490 | case SET_ATTRIBUTE: | |
1491 | r = glob_item(i, path_set_attribute, false); | |
1492 | if (r < 0) | |
1493 | return r; | |
1494 | break; | |
1495 | ||
1496 | case RECURSIVE_SET_ATTRIBUTE: | |
1497 | r = glob_item(i, path_set_attribute, true); | |
1498 | if (r < 0) | |
1499 | return r; | |
1500 | break; | |
1501 | } | |
1502 | ||
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | static int remove_item_instance(Item *i, const char *instance) { | |
1507 | int r; | |
1508 | ||
1509 | assert(i); | |
1510 | ||
1511 | switch (i->type) { | |
1512 | ||
1513 | case REMOVE_PATH: | |
1514 | if (remove(instance) < 0 && errno != ENOENT) | |
1515 | return log_error_errno(errno, "rm(%s): %m", instance); | |
1516 | ||
1517 | break; | |
1518 | ||
1519 | case TRUNCATE_DIRECTORY: | |
1520 | case RECURSIVE_REMOVE_PATH: | |
1521 | /* FIXME: we probably should use dir_cleanup() here | |
1522 | * instead of rm_rf() so that 'x' is honoured. */ | |
1523 | log_debug("rm -rf \"%s\"", instance); | |
1524 | r = rm_rf(instance, (i->type == RECURSIVE_REMOVE_PATH ? REMOVE_ROOT|REMOVE_SUBVOLUME : 0) | REMOVE_PHYSICAL); | |
1525 | if (r < 0 && r != -ENOENT) | |
1526 | return log_error_errno(r, "rm_rf(%s): %m", instance); | |
1527 | ||
1528 | break; | |
1529 | ||
1530 | default: | |
1531 | assert_not_reached("wut?"); | |
1532 | } | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | static int remove_item(Item *i) { | |
1538 | int r = 0; | |
1539 | ||
1540 | assert(i); | |
1541 | ||
1542 | log_debug("Running remove action for entry %c %s", (char) i->type, i->path); | |
1543 | ||
1544 | switch (i->type) { | |
1545 | ||
1546 | case CREATE_FILE: | |
1547 | case TRUNCATE_FILE: | |
1548 | case CREATE_DIRECTORY: | |
1549 | case CREATE_SUBVOLUME: | |
1550 | case CREATE_SUBVOLUME_INHERIT_QUOTA: | |
1551 | case CREATE_SUBVOLUME_NEW_QUOTA: | |
1552 | case CREATE_FIFO: | |
1553 | case CREATE_SYMLINK: | |
1554 | case CREATE_CHAR_DEVICE: | |
1555 | case CREATE_BLOCK_DEVICE: | |
1556 | case IGNORE_PATH: | |
1557 | case IGNORE_DIRECTORY_PATH: | |
1558 | case ADJUST_MODE: | |
1559 | case RELABEL_PATH: | |
1560 | case RECURSIVE_RELABEL_PATH: | |
1561 | case WRITE_FILE: | |
1562 | case COPY_FILES: | |
1563 | case SET_XATTR: | |
1564 | case RECURSIVE_SET_XATTR: | |
1565 | case SET_ACL: | |
1566 | case RECURSIVE_SET_ACL: | |
1567 | case SET_ATTRIBUTE: | |
1568 | case RECURSIVE_SET_ATTRIBUTE: | |
1569 | break; | |
1570 | ||
1571 | case REMOVE_PATH: | |
1572 | case TRUNCATE_DIRECTORY: | |
1573 | case RECURSIVE_REMOVE_PATH: | |
1574 | r = glob_item(i, remove_item_instance, false); | |
1575 | break; | |
1576 | } | |
1577 | ||
1578 | return r; | |
1579 | } | |
1580 | ||
1581 | static int clean_item_instance(Item *i, const char* instance) { | |
1582 | _cleanup_closedir_ DIR *d = NULL; | |
1583 | struct stat s, ps; | |
1584 | bool mountpoint; | |
1585 | usec_t cutoff, n; | |
1586 | char timestamp[FORMAT_TIMESTAMP_MAX]; | |
1587 | ||
1588 | assert(i); | |
1589 | ||
1590 | if (!i->age_set) | |
1591 | return 0; | |
1592 | ||
1593 | n = now(CLOCK_REALTIME); | |
1594 | if (n < i->age) | |
1595 | return 0; | |
1596 | ||
1597 | cutoff = n - i->age; | |
1598 | ||
1599 | d = opendir_nomod(instance); | |
1600 | if (!d) { | |
1601 | if (errno == ENOENT || errno == ENOTDIR) { | |
1602 | log_debug_errno(errno, "Directory \"%s\": %m", instance); | |
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | log_error_errno(errno, "Failed to open directory %s: %m", instance); | |
1607 | return -errno; | |
1608 | } | |
1609 | ||
1610 | if (fstat(dirfd(d), &s) < 0) | |
1611 | return log_error_errno(errno, "stat(%s) failed: %m", i->path); | |
1612 | ||
1613 | if (!S_ISDIR(s.st_mode)) { | |
1614 | log_error("%s is not a directory.", i->path); | |
1615 | return -ENOTDIR; | |
1616 | } | |
1617 | ||
1618 | if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) | |
1619 | return log_error_errno(errno, "stat(%s/..) failed: %m", i->path); | |
1620 | ||
1621 | mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino; | |
1622 | ||
1623 | log_debug("Cleanup threshold for %s \"%s\" is %s", | |
1624 | mountpoint ? "mount point" : "directory", | |
1625 | instance, | |
1626 | format_timestamp_us(timestamp, sizeof(timestamp), cutoff)); | |
1627 | ||
1628 | return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint, | |
1629 | MAX_DEPTH, i->keep_first_level); | |
1630 | } | |
1631 | ||
1632 | static int clean_item(Item *i) { | |
1633 | int r = 0; | |
1634 | ||
1635 | assert(i); | |
1636 | ||
1637 | log_debug("Running clean action for entry %c %s", (char) i->type, i->path); | |
1638 | ||
1639 | switch (i->type) { | |
1640 | case CREATE_DIRECTORY: | |
1641 | case CREATE_SUBVOLUME: | |
1642 | case CREATE_SUBVOLUME_INHERIT_QUOTA: | |
1643 | case CREATE_SUBVOLUME_NEW_QUOTA: | |
1644 | case TRUNCATE_DIRECTORY: | |
1645 | case IGNORE_PATH: | |
1646 | case COPY_FILES: | |
1647 | clean_item_instance(i, i->path); | |
1648 | break; | |
1649 | case IGNORE_DIRECTORY_PATH: | |
1650 | r = glob_item(i, clean_item_instance, false); | |
1651 | break; | |
1652 | default: | |
1653 | break; | |
1654 | } | |
1655 | ||
1656 | return r; | |
1657 | } | |
1658 | ||
1659 | static int process_item_array(ItemArray *array); | |
1660 | ||
1661 | static int process_item(Item *i) { | |
1662 | int r, q, p, t = 0; | |
1663 | _cleanup_free_ char *prefix = NULL; | |
1664 | ||
1665 | assert(i); | |
1666 | ||
1667 | if (i->done) | |
1668 | return 0; | |
1669 | ||
1670 | i->done = true; | |
1671 | ||
1672 | prefix = malloc(strlen(i->path) + 1); | |
1673 | if (!prefix) | |
1674 | return log_oom(); | |
1675 | ||
1676 | PATH_FOREACH_PREFIX(prefix, i->path) { | |
1677 | ItemArray *j; | |
1678 | ||
1679 | j = ordered_hashmap_get(items, prefix); | |
1680 | if (j) { | |
1681 | int s; | |
1682 | ||
1683 | s = process_item_array(j); | |
1684 | if (s < 0 && t == 0) | |
1685 | t = s; | |
1686 | } | |
1687 | } | |
1688 | ||
1689 | r = arg_create ? create_item(i) : 0; | |
1690 | q = arg_remove ? remove_item(i) : 0; | |
1691 | p = arg_clean ? clean_item(i) : 0; | |
1692 | ||
1693 | return t < 0 ? t : | |
1694 | r < 0 ? r : | |
1695 | q < 0 ? q : | |
1696 | p; | |
1697 | } | |
1698 | ||
1699 | static int process_item_array(ItemArray *array) { | |
1700 | unsigned n; | |
1701 | int r = 0, k; | |
1702 | ||
1703 | assert(array); | |
1704 | ||
1705 | for (n = 0; n < array->count; n++) { | |
1706 | k = process_item(array->items + n); | |
1707 | if (k < 0 && r == 0) | |
1708 | r = k; | |
1709 | } | |
1710 | ||
1711 | return r; | |
1712 | } | |
1713 | ||
1714 | static void item_free_contents(Item *i) { | |
1715 | assert(i); | |
1716 | free(i->path); | |
1717 | free(i->argument); | |
1718 | strv_free(i->xattrs); | |
1719 | ||
1720 | #ifdef HAVE_ACL | |
1721 | acl_free(i->acl_access); | |
1722 | acl_free(i->acl_default); | |
1723 | #endif | |
1724 | } | |
1725 | ||
1726 | static void item_array_free(ItemArray *a) { | |
1727 | unsigned n; | |
1728 | ||
1729 | if (!a) | |
1730 | return; | |
1731 | ||
1732 | for (n = 0; n < a->count; n++) | |
1733 | item_free_contents(a->items + n); | |
1734 | free(a->items); | |
1735 | free(a); | |
1736 | } | |
1737 | ||
1738 | static int item_compare(const void *a, const void *b) { | |
1739 | const Item *x = a, *y = b; | |
1740 | ||
1741 | /* Make sure that the ownership taking item is put first, so | |
1742 | * that we first create the node, and then can adjust it */ | |
1743 | ||
1744 | if (takes_ownership(x->type) && !takes_ownership(y->type)) | |
1745 | return -1; | |
1746 | if (!takes_ownership(x->type) && takes_ownership(y->type)) | |
1747 | return 1; | |
1748 | ||
1749 | return (int) x->type - (int) y->type; | |
1750 | } | |
1751 | ||
1752 | static bool item_compatible(Item *a, Item *b) { | |
1753 | assert(a); | |
1754 | assert(b); | |
1755 | assert(streq(a->path, b->path)); | |
1756 | ||
1757 | if (takes_ownership(a->type) && takes_ownership(b->type)) | |
1758 | /* check if the items are the same */ | |
1759 | return streq_ptr(a->argument, b->argument) && | |
1760 | ||
1761 | a->uid_set == b->uid_set && | |
1762 | a->uid == b->uid && | |
1763 | ||
1764 | a->gid_set == b->gid_set && | |
1765 | a->gid == b->gid && | |
1766 | ||
1767 | a->mode_set == b->mode_set && | |
1768 | a->mode == b->mode && | |
1769 | ||
1770 | a->age_set == b->age_set && | |
1771 | a->age == b->age && | |
1772 | ||
1773 | a->mask_perms == b->mask_perms && | |
1774 | ||
1775 | a->keep_first_level == b->keep_first_level && | |
1776 | ||
1777 | a->major_minor == b->major_minor; | |
1778 | ||
1779 | return true; | |
1780 | } | |
1781 | ||
1782 | static bool should_include_path(const char *path) { | |
1783 | char **prefix; | |
1784 | ||
1785 | STRV_FOREACH(prefix, arg_exclude_prefixes) | |
1786 | if (path_startswith(path, *prefix)) { | |
1787 | log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.", | |
1788 | path, *prefix); | |
1789 | return false; | |
1790 | } | |
1791 | ||
1792 | STRV_FOREACH(prefix, arg_include_prefixes) | |
1793 | if (path_startswith(path, *prefix)) { | |
1794 | log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix); | |
1795 | return true; | |
1796 | } | |
1797 | ||
1798 | /* no matches, so we should include this path only if we | |
1799 | * have no whitelist at all */ | |
1800 | if (strv_length(arg_include_prefixes) == 0) | |
1801 | return true; | |
1802 | ||
1803 | log_debug("Entry \"%s\" does not match any include prefix, skipping.", path); | |
1804 | return false; | |
1805 | } | |
1806 | ||
1807 | static int parse_line(const char *fname, unsigned line, const char *buffer) { | |
1808 | ||
1809 | _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL; | |
1810 | _cleanup_(item_free_contents) Item i = {}; | |
1811 | ItemArray *existing; | |
1812 | OrderedHashmap *h; | |
1813 | int r, pos; | |
1814 | bool force = false, boot = false; | |
1815 | ||
1816 | assert(fname); | |
1817 | assert(line >= 1); | |
1818 | assert(buffer); | |
1819 | ||
1820 | r = extract_many_words( | |
1821 | &buffer, | |
1822 | NULL, | |
1823 | EXTRACT_QUOTES, | |
1824 | &action, | |
1825 | &path, | |
1826 | &mode, | |
1827 | &user, | |
1828 | &group, | |
1829 | &age, | |
1830 | NULL); | |
1831 | if (r < 0) | |
1832 | return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line); | |
1833 | else if (r < 2) { | |
1834 | log_error("[%s:%u] Syntax error.", fname, line); | |
1835 | return -EIO; | |
1836 | } | |
1837 | ||
1838 | if (!isempty(buffer) && !streq(buffer, "-")) { | |
1839 | i.argument = strdup(buffer); | |
1840 | if (!i.argument) | |
1841 | return log_oom(); | |
1842 | } | |
1843 | ||
1844 | if (isempty(action)) { | |
1845 | log_error("[%s:%u] Command too short '%s'.", fname, line, action); | |
1846 | return -EINVAL; | |
1847 | } | |
1848 | ||
1849 | for (pos = 1; action[pos]; pos++) { | |
1850 | if (action[pos] == '!' && !boot) | |
1851 | boot = true; | |
1852 | else if (action[pos] == '+' && !force) | |
1853 | force = true; | |
1854 | else { | |
1855 | log_error("[%s:%u] Unknown modifiers in command '%s'", | |
1856 | fname, line, action); | |
1857 | return -EINVAL; | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | if (boot && !arg_boot) { | |
1862 | log_debug("Ignoring entry %s \"%s\" because --boot is not specified.", | |
1863 | action, path); | |
1864 | return 0; | |
1865 | } | |
1866 | ||
1867 | i.type = action[0]; | |
1868 | i.force = force; | |
1869 | ||
1870 | r = specifier_printf(path, specifier_table, NULL, &i.path); | |
1871 | if (r < 0) { | |
1872 | log_error("[%s:%u] Failed to replace specifiers: %s", fname, line, path); | |
1873 | return r; | |
1874 | } | |
1875 | ||
1876 | switch (i.type) { | |
1877 | ||
1878 | case CREATE_DIRECTORY: | |
1879 | case CREATE_SUBVOLUME: | |
1880 | case CREATE_SUBVOLUME_INHERIT_QUOTA: | |
1881 | case CREATE_SUBVOLUME_NEW_QUOTA: | |
1882 | case TRUNCATE_DIRECTORY: | |
1883 | case CREATE_FIFO: | |
1884 | case IGNORE_PATH: | |
1885 | case IGNORE_DIRECTORY_PATH: | |
1886 | case REMOVE_PATH: | |
1887 | case RECURSIVE_REMOVE_PATH: | |
1888 | case ADJUST_MODE: | |
1889 | case RELABEL_PATH: | |
1890 | case RECURSIVE_RELABEL_PATH: | |
1891 | if (i.argument) | |
1892 | log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type); | |
1893 | ||
1894 | break; | |
1895 | ||
1896 | case CREATE_FILE: | |
1897 | case TRUNCATE_FILE: | |
1898 | break; | |
1899 | ||
1900 | case CREATE_SYMLINK: | |
1901 | if (!i.argument) { | |
1902 | i.argument = strappend("/usr/share/factory/", i.path); | |
1903 | if (!i.argument) | |
1904 | return log_oom(); | |
1905 | } | |
1906 | break; | |
1907 | ||
1908 | case WRITE_FILE: | |
1909 | if (!i.argument) { | |
1910 | log_error("[%s:%u] Write file requires argument.", fname, line); | |
1911 | return -EBADMSG; | |
1912 | } | |
1913 | break; | |
1914 | ||
1915 | case COPY_FILES: | |
1916 | if (!i.argument) { | |
1917 | i.argument = strappend("/usr/share/factory/", i.path); | |
1918 | if (!i.argument) | |
1919 | return log_oom(); | |
1920 | } else if (!path_is_absolute(i.argument)) { | |
1921 | log_error("[%s:%u] Source path is not absolute.", fname, line); | |
1922 | return -EBADMSG; | |
1923 | } | |
1924 | ||
1925 | path_kill_slashes(i.argument); | |
1926 | break; | |
1927 | ||
1928 | case CREATE_CHAR_DEVICE: | |
1929 | case CREATE_BLOCK_DEVICE: { | |
1930 | unsigned major, minor; | |
1931 | ||
1932 | if (!i.argument) { | |
1933 | log_error("[%s:%u] Device file requires argument.", fname, line); | |
1934 | return -EBADMSG; | |
1935 | } | |
1936 | ||
1937 | if (sscanf(i.argument, "%u:%u", &major, &minor) != 2) { | |
1938 | log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument); | |
1939 | return -EBADMSG; | |
1940 | } | |
1941 | ||
1942 | i.major_minor = makedev(major, minor); | |
1943 | break; | |
1944 | } | |
1945 | ||
1946 | case SET_XATTR: | |
1947 | case RECURSIVE_SET_XATTR: | |
1948 | if (!i.argument) { | |
1949 | log_error("[%s:%u] Set extended attribute requires argument.", fname, line); | |
1950 | return -EBADMSG; | |
1951 | } | |
1952 | r = parse_xattrs_from_arg(&i); | |
1953 | if (r < 0) | |
1954 | return r; | |
1955 | break; | |
1956 | ||
1957 | case SET_ACL: | |
1958 | case RECURSIVE_SET_ACL: | |
1959 | if (!i.argument) { | |
1960 | log_error("[%s:%u] Set ACLs requires argument.", fname, line); | |
1961 | return -EBADMSG; | |
1962 | } | |
1963 | r = parse_acls_from_arg(&i); | |
1964 | if (r < 0) | |
1965 | return r; | |
1966 | break; | |
1967 | ||
1968 | case SET_ATTRIBUTE: | |
1969 | case RECURSIVE_SET_ATTRIBUTE: | |
1970 | if (!i.argument) { | |
1971 | log_error("[%s:%u] Set file attribute requires argument.", fname, line); | |
1972 | return -EBADMSG; | |
1973 | } | |
1974 | r = parse_attribute_from_arg(&i); | |
1975 | if (r < 0) | |
1976 | return r; | |
1977 | break; | |
1978 | ||
1979 | default: | |
1980 | log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type); | |
1981 | return -EBADMSG; | |
1982 | } | |
1983 | ||
1984 | if (!path_is_absolute(i.path)) { | |
1985 | log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path); | |
1986 | return -EBADMSG; | |
1987 | } | |
1988 | ||
1989 | path_kill_slashes(i.path); | |
1990 | ||
1991 | if (!should_include_path(i.path)) | |
1992 | return 0; | |
1993 | ||
1994 | if (arg_root) { | |
1995 | char *p; | |
1996 | ||
1997 | p = prefix_root(arg_root, i.path); | |
1998 | if (!p) | |
1999 | return log_oom(); | |
2000 | ||
2001 | free(i.path); | |
2002 | i.path = p; | |
2003 | } | |
2004 | ||
2005 | if (!isempty(user) && !streq(user, "-")) { | |
2006 | const char *u = user; | |
2007 | ||
2008 | r = get_user_creds(&u, &i.uid, NULL, NULL, NULL); | |
2009 | if (r < 0) { | |
2010 | log_error("[%s:%u] Unknown user '%s'.", fname, line, user); | |
2011 | return r; | |
2012 | } | |
2013 | ||
2014 | i.uid_set = true; | |
2015 | } | |
2016 | ||
2017 | if (!isempty(group) && !streq(group, "-")) { | |
2018 | const char *g = group; | |
2019 | ||
2020 | r = get_group_creds(&g, &i.gid); | |
2021 | if (r < 0) { | |
2022 | log_error("[%s:%u] Unknown group '%s'.", fname, line, group); | |
2023 | return r; | |
2024 | } | |
2025 | ||
2026 | i.gid_set = true; | |
2027 | } | |
2028 | ||
2029 | if (!isempty(mode) && !streq(mode, "-")) { | |
2030 | const char *mm = mode; | |
2031 | unsigned m; | |
2032 | ||
2033 | if (*mm == '~') { | |
2034 | i.mask_perms = true; | |
2035 | mm++; | |
2036 | } | |
2037 | ||
2038 | if (parse_mode(mm, &m) < 0) { | |
2039 | log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode); | |
2040 | return -EBADMSG; | |
2041 | } | |
2042 | ||
2043 | i.mode = m; | |
2044 | i.mode_set = true; | |
2045 | } else | |
2046 | i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644; | |
2047 | ||
2048 | if (!isempty(age) && !streq(age, "-")) { | |
2049 | const char *a = age; | |
2050 | ||
2051 | if (*a == '~') { | |
2052 | i.keep_first_level = true; | |
2053 | a++; | |
2054 | } | |
2055 | ||
2056 | if (parse_sec(a, &i.age) < 0) { | |
2057 | log_error("[%s:%u] Invalid age '%s'.", fname, line, age); | |
2058 | return -EBADMSG; | |
2059 | } | |
2060 | ||
2061 | i.age_set = true; | |
2062 | } | |
2063 | ||
2064 | h = needs_glob(i.type) ? globs : items; | |
2065 | ||
2066 | existing = ordered_hashmap_get(h, i.path); | |
2067 | if (existing) { | |
2068 | unsigned n; | |
2069 | ||
2070 | for (n = 0; n < existing->count; n++) { | |
2071 | if (!item_compatible(existing->items + n, &i)) { | |
2072 | log_warning("[%s:%u] Duplicate line for path \"%s\", ignoring.", | |
2073 | fname, line, i.path); | |
2074 | return 0; | |
2075 | } | |
2076 | } | |
2077 | } else { | |
2078 | existing = new0(ItemArray, 1); | |
2079 | r = ordered_hashmap_put(h, i.path, existing); | |
2080 | if (r < 0) | |
2081 | return log_oom(); | |
2082 | } | |
2083 | ||
2084 | if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1)) | |
2085 | return log_oom(); | |
2086 | ||
2087 | memcpy(existing->items + existing->count++, &i, sizeof(i)); | |
2088 | ||
2089 | /* Sort item array, to enforce stable ordering of application */ | |
2090 | qsort_safe(existing->items, existing->count, sizeof(Item), item_compare); | |
2091 | ||
2092 | zero(i); | |
2093 | return 0; | |
2094 | } | |
2095 | ||
2096 | static void help(void) { | |
2097 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" | |
2098 | "Creates, deletes and cleans up volatile and temporary files and directories.\n\n" | |
2099 | " -h --help Show this help\n" | |
2100 | " --version Show package version\n" | |
2101 | " --create Create marked files/directories\n" | |
2102 | " --clean Clean up marked directories\n" | |
2103 | " --remove Remove marked files/directories\n" | |
2104 | " --boot Execute actions only safe at boot\n" | |
2105 | " --prefix=PATH Only apply rules with the specified prefix\n" | |
2106 | " --exclude-prefix=PATH Ignore rules with the specified prefix\n" | |
2107 | " --root=PATH Operate on an alternate filesystem root\n", | |
2108 | program_invocation_short_name); | |
2109 | } | |
2110 | ||
2111 | static int parse_argv(int argc, char *argv[]) { | |
2112 | ||
2113 | enum { | |
2114 | ARG_VERSION = 0x100, | |
2115 | ARG_CREATE, | |
2116 | ARG_CLEAN, | |
2117 | ARG_REMOVE, | |
2118 | ARG_BOOT, | |
2119 | ARG_PREFIX, | |
2120 | ARG_EXCLUDE_PREFIX, | |
2121 | ARG_ROOT, | |
2122 | }; | |
2123 | ||
2124 | static const struct option options[] = { | |
2125 | { "help", no_argument, NULL, 'h' }, | |
2126 | { "version", no_argument, NULL, ARG_VERSION }, | |
2127 | { "create", no_argument, NULL, ARG_CREATE }, | |
2128 | { "clean", no_argument, NULL, ARG_CLEAN }, | |
2129 | { "remove", no_argument, NULL, ARG_REMOVE }, | |
2130 | { "boot", no_argument, NULL, ARG_BOOT }, | |
2131 | { "prefix", required_argument, NULL, ARG_PREFIX }, | |
2132 | { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX }, | |
2133 | { "root", required_argument, NULL, ARG_ROOT }, | |
2134 | {} | |
2135 | }; | |
2136 | ||
2137 | int c, r; | |
2138 | ||
2139 | assert(argc >= 0); | |
2140 | assert(argv); | |
2141 | ||
2142 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
2143 | ||
2144 | switch (c) { | |
2145 | ||
2146 | case 'h': | |
2147 | help(); | |
2148 | return 0; | |
2149 | ||
2150 | case ARG_VERSION: | |
2151 | return version(); | |
2152 | ||
2153 | case ARG_CREATE: | |
2154 | arg_create = true; | |
2155 | break; | |
2156 | ||
2157 | case ARG_CLEAN: | |
2158 | arg_clean = true; | |
2159 | break; | |
2160 | ||
2161 | case ARG_REMOVE: | |
2162 | arg_remove = true; | |
2163 | break; | |
2164 | ||
2165 | case ARG_BOOT: | |
2166 | arg_boot = true; | |
2167 | break; | |
2168 | ||
2169 | case ARG_PREFIX: | |
2170 | if (strv_push(&arg_include_prefixes, optarg) < 0) | |
2171 | return log_oom(); | |
2172 | break; | |
2173 | ||
2174 | case ARG_EXCLUDE_PREFIX: | |
2175 | if (strv_push(&arg_exclude_prefixes, optarg) < 0) | |
2176 | return log_oom(); | |
2177 | break; | |
2178 | ||
2179 | case ARG_ROOT: | |
2180 | r = parse_path_argument_and_warn(optarg, true, &arg_root); | |
2181 | if (r < 0) | |
2182 | return r; | |
2183 | break; | |
2184 | ||
2185 | case '?': | |
2186 | return -EINVAL; | |
2187 | ||
2188 | default: | |
2189 | assert_not_reached("Unhandled option"); | |
2190 | } | |
2191 | ||
2192 | if (!arg_clean && !arg_create && !arg_remove) { | |
2193 | log_error("You need to specify at least one of --clean, --create or --remove."); | |
2194 | return -EINVAL; | |
2195 | } | |
2196 | ||
2197 | return 1; | |
2198 | } | |
2199 | ||
2200 | static int read_config_file(const char *fn, bool ignore_enoent) { | |
2201 | _cleanup_fclose_ FILE *f = NULL; | |
2202 | char line[LINE_MAX]; | |
2203 | Iterator iterator; | |
2204 | unsigned v = 0; | |
2205 | Item *i; | |
2206 | int r; | |
2207 | ||
2208 | assert(fn); | |
2209 | ||
2210 | r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &f); | |
2211 | if (r < 0) { | |
2212 | if (ignore_enoent && r == -ENOENT) { | |
2213 | log_debug_errno(r, "Failed to open \"%s\": %m", fn); | |
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); | |
2218 | } | |
2219 | log_debug("Reading config file \"%s\".", fn); | |
2220 | ||
2221 | FOREACH_LINE(line, f, break) { | |
2222 | char *l; | |
2223 | int k; | |
2224 | ||
2225 | v++; | |
2226 | ||
2227 | l = strstrip(line); | |
2228 | if (*l == '#' || *l == 0) | |
2229 | continue; | |
2230 | ||
2231 | k = parse_line(fn, v, l); | |
2232 | if (k < 0 && r == 0) | |
2233 | r = k; | |
2234 | } | |
2235 | ||
2236 | /* we have to determine age parameter for each entry of type X */ | |
2237 | ORDERED_HASHMAP_FOREACH(i, globs, iterator) { | |
2238 | Iterator iter; | |
2239 | Item *j, *candidate_item = NULL; | |
2240 | ||
2241 | if (i->type != IGNORE_DIRECTORY_PATH) | |
2242 | continue; | |
2243 | ||
2244 | ORDERED_HASHMAP_FOREACH(j, items, iter) { | |
2245 | if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA)) | |
2246 | continue; | |
2247 | ||
2248 | if (path_equal(j->path, i->path)) { | |
2249 | candidate_item = j; | |
2250 | break; | |
2251 | } | |
2252 | ||
2253 | if ((!candidate_item && path_startswith(i->path, j->path)) || | |
2254 | (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0))) | |
2255 | candidate_item = j; | |
2256 | } | |
2257 | ||
2258 | if (candidate_item && candidate_item->age_set) { | |
2259 | i->age = candidate_item->age; | |
2260 | i->age_set = true; | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | if (ferror(f)) { | |
2265 | log_error_errno(errno, "Failed to read from file %s: %m", fn); | |
2266 | if (r == 0) | |
2267 | r = -EIO; | |
2268 | } | |
2269 | ||
2270 | return r; | |
2271 | } | |
2272 | ||
2273 | int main(int argc, char *argv[]) { | |
2274 | int r, k; | |
2275 | ItemArray *a; | |
2276 | Iterator iterator; | |
2277 | ||
2278 | r = parse_argv(argc, argv); | |
2279 | if (r <= 0) | |
2280 | goto finish; | |
2281 | ||
2282 | log_set_target(LOG_TARGET_AUTO); | |
2283 | log_parse_environment(); | |
2284 | log_open(); | |
2285 | ||
2286 | umask(0022); | |
2287 | ||
2288 | mac_selinux_init(); | |
2289 | ||
2290 | items = ordered_hashmap_new(&string_hash_ops); | |
2291 | globs = ordered_hashmap_new(&string_hash_ops); | |
2292 | ||
2293 | if (!items || !globs) { | |
2294 | r = log_oom(); | |
2295 | goto finish; | |
2296 | } | |
2297 | ||
2298 | r = 0; | |
2299 | ||
2300 | if (optind < argc) { | |
2301 | int j; | |
2302 | ||
2303 | for (j = optind; j < argc; j++) { | |
2304 | k = read_config_file(argv[j], false); | |
2305 | if (k < 0 && r == 0) | |
2306 | r = k; | |
2307 | } | |
2308 | ||
2309 | } else { | |
2310 | _cleanup_strv_free_ char **files = NULL; | |
2311 | char **f; | |
2312 | ||
2313 | r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs); | |
2314 | if (r < 0) { | |
2315 | log_error_errno(r, "Failed to enumerate tmpfiles.d files: %m"); | |
2316 | goto finish; | |
2317 | } | |
2318 | ||
2319 | STRV_FOREACH(f, files) { | |
2320 | k = read_config_file(*f, true); | |
2321 | if (k < 0 && r == 0) | |
2322 | r = k; | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | /* The non-globbing ones usually create things, hence we apply | |
2327 | * them first */ | |
2328 | ORDERED_HASHMAP_FOREACH(a, items, iterator) { | |
2329 | k = process_item_array(a); | |
2330 | if (k < 0 && r == 0) | |
2331 | r = k; | |
2332 | } | |
2333 | ||
2334 | /* The globbing ones usually alter things, hence we apply them | |
2335 | * second. */ | |
2336 | ORDERED_HASHMAP_FOREACH(a, globs, iterator) { | |
2337 | k = process_item_array(a); | |
2338 | if (k < 0 && r == 0) | |
2339 | r = k; | |
2340 | } | |
2341 | ||
2342 | finish: | |
2343 | while ((a = ordered_hashmap_steal_first(items))) | |
2344 | item_array_free(a); | |
2345 | ||
2346 | while ((a = ordered_hashmap_steal_first(globs))) | |
2347 | item_array_free(a); | |
2348 | ||
2349 | ordered_hashmap_free(items); | |
2350 | ordered_hashmap_free(globs); | |
2351 | ||
2352 | free(arg_include_prefixes); | |
2353 | free(arg_exclude_prefixes); | |
2354 | free(arg_root); | |
2355 | ||
2356 | set_free_free(unix_sockets); | |
2357 | ||
2358 | mac_selinux_finish(); | |
2359 | ||
2360 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
2361 | } |