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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering, Kay Sievers | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <unistd.h> | |
23 | #include <fcntl.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <sys/stat.h> | |
27 | #include <limits.h> | |
28 | #include <dirent.h> | |
29 | #include <grp.h> | |
30 | #include <pwd.h> | |
31 | #include <stdio.h> | |
32 | #include <stdlib.h> | |
33 | #include <stddef.h> | |
34 | #include <getopt.h> | |
35 | #include <stdbool.h> | |
36 | #include <time.h> | |
37 | #include <sys/types.h> | |
38 | #include <sys/param.h> | |
39 | #include <glob.h> | |
40 | #include <fnmatch.h> | |
41 | ||
42 | #include "log.h" | |
43 | #include "util.h" | |
44 | #include "mkdir.h" | |
45 | #include "path-util.h" | |
46 | #include "strv.h" | |
47 | #include "label.h" | |
48 | #include "set.h" | |
49 | #include "conf-files.h" | |
50 | ||
51 | /* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates | |
52 | * them in the file system. This is intended to be used to create | |
53 | * properly owned directories beneath /tmp, /var/tmp, /run, which are | |
54 | * volatile and hence need to be recreated on bootup. */ | |
55 | ||
56 | typedef enum ItemType { | |
57 | /* These ones take file names */ | |
58 | CREATE_FILE = 'f', | |
59 | TRUNCATE_FILE = 'F', | |
60 | WRITE_FILE = 'w', | |
61 | CREATE_DIRECTORY = 'd', | |
62 | TRUNCATE_DIRECTORY = 'D', | |
63 | CREATE_FIFO = 'p', | |
64 | CREATE_SYMLINK = 'L', | |
65 | CREATE_CHAR_DEVICE = 'c', | |
66 | CREATE_BLOCK_DEVICE = 'b', | |
67 | ||
68 | /* These ones take globs */ | |
69 | IGNORE_PATH = 'x', | |
70 | REMOVE_PATH = 'r', | |
71 | RECURSIVE_REMOVE_PATH = 'R', | |
72 | RELABEL_PATH = 'z', | |
73 | RECURSIVE_RELABEL_PATH = 'Z' | |
74 | } ItemType; | |
75 | ||
76 | typedef struct Item { | |
77 | ItemType type; | |
78 | ||
79 | char *path; | |
80 | char *argument; | |
81 | uid_t uid; | |
82 | gid_t gid; | |
83 | mode_t mode; | |
84 | usec_t age; | |
85 | ||
86 | dev_t major_minor; | |
87 | ||
88 | bool uid_set:1; | |
89 | bool gid_set:1; | |
90 | bool mode_set:1; | |
91 | bool age_set:1; | |
92 | } Item; | |
93 | ||
94 | static Hashmap *items = NULL, *globs = NULL; | |
95 | static Set *unix_sockets = NULL; | |
96 | ||
97 | static bool arg_create = false; | |
98 | static bool arg_clean = false; | |
99 | static bool arg_remove = false; | |
100 | ||
101 | static const char *arg_prefix = NULL; | |
102 | ||
103 | static const char *conf_file_dirs[] = { | |
104 | "/etc/tmpfiles.d", | |
105 | "/run/tmpfiles.d", | |
106 | "/usr/local/lib/tmpfiles.d", | |
107 | "/usr/lib/tmpfiles.d", | |
108 | NULL | |
109 | }; | |
110 | ||
111 | #define MAX_DEPTH 256 | |
112 | ||
113 | static bool needs_glob(ItemType t) { | |
114 | return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RELABEL_PATH || t == RECURSIVE_RELABEL_PATH; | |
115 | } | |
116 | ||
117 | static struct Item* find_glob(Hashmap *h, const char *match) { | |
118 | Item *j; | |
119 | Iterator i; | |
120 | ||
121 | HASHMAP_FOREACH(j, h, i) | |
122 | if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0) | |
123 | return j; | |
124 | ||
125 | return NULL; | |
126 | } | |
127 | ||
128 | static void load_unix_sockets(void) { | |
129 | FILE *f = NULL; | |
130 | char line[LINE_MAX]; | |
131 | ||
132 | if (unix_sockets) | |
133 | return; | |
134 | ||
135 | /* We maintain a cache of the sockets we found in | |
136 | * /proc/net/unix to speed things up a little. */ | |
137 | ||
138 | unix_sockets = set_new(string_hash_func, string_compare_func); | |
139 | if (!unix_sockets) | |
140 | return; | |
141 | ||
142 | f = fopen("/proc/net/unix", "re"); | |
143 | if (!f) | |
144 | return; | |
145 | ||
146 | /* Skip header */ | |
147 | if (!fgets(line, sizeof(line), f)) | |
148 | goto fail; | |
149 | ||
150 | for (;;) { | |
151 | char *p, *s; | |
152 | int k; | |
153 | ||
154 | if (!fgets(line, sizeof(line), f)) | |
155 | break; | |
156 | ||
157 | truncate_nl(line); | |
158 | ||
159 | p = strchr(line, ':'); | |
160 | if (!p) | |
161 | continue; | |
162 | ||
163 | if (strlen(p) < 37) | |
164 | continue; | |
165 | ||
166 | p += 37; | |
167 | p += strspn(p, WHITESPACE); | |
168 | p += strcspn(p, WHITESPACE); /* skip one more word */ | |
169 | p += strspn(p, WHITESPACE); | |
170 | ||
171 | if (*p != '/') | |
172 | continue; | |
173 | ||
174 | s = strdup(p); | |
175 | if (!s) | |
176 | goto fail; | |
177 | ||
178 | path_kill_slashes(s); | |
179 | ||
180 | k = set_put(unix_sockets, s); | |
181 | if (k < 0) { | |
182 | free(s); | |
183 | ||
184 | if (k != -EEXIST) | |
185 | goto fail; | |
186 | } | |
187 | } | |
188 | ||
189 | fclose(f); | |
190 | return; | |
191 | ||
192 | fail: | |
193 | set_free_free(unix_sockets); | |
194 | unix_sockets = NULL; | |
195 | ||
196 | if (f) | |
197 | fclose(f); | |
198 | } | |
199 | ||
200 | static bool unix_socket_alive(const char *fn) { | |
201 | assert(fn); | |
202 | ||
203 | load_unix_sockets(); | |
204 | ||
205 | if (unix_sockets) | |
206 | return !!set_get(unix_sockets, (char*) fn); | |
207 | ||
208 | /* We don't know, so assume yes */ | |
209 | return true; | |
210 | } | |
211 | ||
212 | static int dir_cleanup( | |
213 | const char *p, | |
214 | DIR *d, | |
215 | const struct stat *ds, | |
216 | usec_t cutoff, | |
217 | dev_t rootdev, | |
218 | bool mountpoint, | |
219 | int maxdepth) | |
220 | { | |
221 | struct dirent *dent; | |
222 | struct timespec times[2]; | |
223 | bool deleted = false; | |
224 | char *sub_path = NULL; | |
225 | int r = 0; | |
226 | ||
227 | while ((dent = readdir(d))) { | |
228 | struct stat s; | |
229 | usec_t age; | |
230 | ||
231 | if (streq(dent->d_name, ".") || | |
232 | streq(dent->d_name, "..")) | |
233 | continue; | |
234 | ||
235 | if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) { | |
236 | ||
237 | if (errno != ENOENT) { | |
238 | log_error("stat(%s/%s) failed: %m", p, dent->d_name); | |
239 | r = -errno; | |
240 | } | |
241 | ||
242 | continue; | |
243 | } | |
244 | ||
245 | /* Stay on the same filesystem */ | |
246 | if (s.st_dev != rootdev) | |
247 | continue; | |
248 | ||
249 | /* Do not delete read-only files owned by root */ | |
250 | if (s.st_uid == 0 && !(s.st_mode & S_IWUSR)) | |
251 | continue; | |
252 | ||
253 | free(sub_path); | |
254 | sub_path = NULL; | |
255 | ||
256 | if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) { | |
257 | log_error("Out of memory"); | |
258 | r = -ENOMEM; | |
259 | goto finish; | |
260 | } | |
261 | ||
262 | /* Is there an item configured for this path? */ | |
263 | if (hashmap_get(items, sub_path)) | |
264 | continue; | |
265 | ||
266 | if (find_glob(globs, sub_path)) | |
267 | continue; | |
268 | ||
269 | if (S_ISDIR(s.st_mode)) { | |
270 | ||
271 | if (mountpoint && | |
272 | streq(dent->d_name, "lost+found") && | |
273 | s.st_uid == 0) | |
274 | continue; | |
275 | ||
276 | if (maxdepth <= 0) | |
277 | log_warning("Reached max depth on %s.", sub_path); | |
278 | else { | |
279 | DIR *sub_dir; | |
280 | int q; | |
281 | ||
282 | sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW|O_NOATIME); | |
283 | if (sub_dir == NULL) { | |
284 | if (errno != ENOENT) { | |
285 | log_error("opendir(%s/%s) failed: %m", p, dent->d_name); | |
286 | r = -errno; | |
287 | } | |
288 | ||
289 | continue; | |
290 | } | |
291 | ||
292 | q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1); | |
293 | closedir(sub_dir); | |
294 | ||
295 | if (q < 0) | |
296 | r = q; | |
297 | } | |
298 | ||
299 | /* Ignore ctime, we change it when deleting */ | |
300 | age = MAX(timespec_load(&s.st_mtim), | |
301 | timespec_load(&s.st_atim)); | |
302 | if (age >= cutoff) | |
303 | continue; | |
304 | ||
305 | log_debug("rmdir '%s'\n", sub_path); | |
306 | ||
307 | if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) { | |
308 | if (errno != ENOENT && errno != ENOTEMPTY) { | |
309 | log_error("rmdir(%s): %m", sub_path); | |
310 | r = -errno; | |
311 | } | |
312 | } | |
313 | ||
314 | } else { | |
315 | /* Skip files for which the sticky bit is | |
316 | * set. These are semantics we define, and are | |
317 | * unknown elsewhere. See XDG_RUNTIME_DIR | |
318 | * specification for details. */ | |
319 | if (s.st_mode & S_ISVTX) | |
320 | continue; | |
321 | ||
322 | if (mountpoint && S_ISREG(s.st_mode)) { | |
323 | if (streq(dent->d_name, ".journal") && | |
324 | s.st_uid == 0) | |
325 | continue; | |
326 | ||
327 | if (streq(dent->d_name, "aquota.user") || | |
328 | streq(dent->d_name, "aquota.group")) | |
329 | continue; | |
330 | } | |
331 | ||
332 | /* Ignore sockets that are listed in /proc/net/unix */ | |
333 | if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) | |
334 | continue; | |
335 | ||
336 | /* Ignore device nodes */ | |
337 | if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) | |
338 | continue; | |
339 | ||
340 | age = MAX3(timespec_load(&s.st_mtim), | |
341 | timespec_load(&s.st_atim), | |
342 | timespec_load(&s.st_ctim)); | |
343 | ||
344 | if (age >= cutoff) | |
345 | continue; | |
346 | ||
347 | log_debug("unlink '%s'\n", sub_path); | |
348 | ||
349 | if (unlinkat(dirfd(d), dent->d_name, 0) < 0) { | |
350 | if (errno != ENOENT) { | |
351 | log_error("unlink(%s): %m", sub_path); | |
352 | r = -errno; | |
353 | } | |
354 | } | |
355 | ||
356 | deleted = true; | |
357 | } | |
358 | } | |
359 | ||
360 | finish: | |
361 | if (deleted) { | |
362 | /* Restore original directory timestamps */ | |
363 | times[0] = ds->st_atim; | |
364 | times[1] = ds->st_mtim; | |
365 | ||
366 | if (futimens(dirfd(d), times) < 0) | |
367 | log_error("utimensat(%s): %m", p); | |
368 | } | |
369 | ||
370 | free(sub_path); | |
371 | ||
372 | return r; | |
373 | } | |
374 | ||
375 | static int clean_item(Item *i) { | |
376 | DIR *d; | |
377 | struct stat s, ps; | |
378 | bool mountpoint; | |
379 | int r; | |
380 | usec_t cutoff, n; | |
381 | ||
382 | assert(i); | |
383 | ||
384 | if (i->type != CREATE_DIRECTORY && | |
385 | i->type != TRUNCATE_DIRECTORY && | |
386 | i->type != IGNORE_PATH) | |
387 | return 0; | |
388 | ||
389 | if (!i->age_set || i->age <= 0) | |
390 | return 0; | |
391 | ||
392 | n = now(CLOCK_REALTIME); | |
393 | if (n < i->age) | |
394 | return 0; | |
395 | ||
396 | cutoff = n - i->age; | |
397 | ||
398 | d = opendir(i->path); | |
399 | if (!d) { | |
400 | if (errno == ENOENT) | |
401 | return 0; | |
402 | ||
403 | log_error("Failed to open directory %s: %m", i->path); | |
404 | return -errno; | |
405 | } | |
406 | ||
407 | if (fstat(dirfd(d), &s) < 0) { | |
408 | log_error("stat(%s) failed: %m", i->path); | |
409 | r = -errno; | |
410 | goto finish; | |
411 | } | |
412 | ||
413 | if (!S_ISDIR(s.st_mode)) { | |
414 | log_error("%s is not a directory.", i->path); | |
415 | r = -ENOTDIR; | |
416 | goto finish; | |
417 | } | |
418 | ||
419 | if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) { | |
420 | log_error("stat(%s/..) failed: %m", i->path); | |
421 | r = -errno; | |
422 | goto finish; | |
423 | } | |
424 | ||
425 | mountpoint = s.st_dev != ps.st_dev || | |
426 | (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino); | |
427 | ||
428 | r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH); | |
429 | ||
430 | finish: | |
431 | if (d) | |
432 | closedir(d); | |
433 | ||
434 | return r; | |
435 | } | |
436 | ||
437 | static int item_set_perms(Item *i, const char *path) { | |
438 | /* not using i->path directly because it may be a glob */ | |
439 | if (i->mode_set) | |
440 | if (chmod(path, i->mode) < 0) { | |
441 | log_error("chmod(%s) failed: %m", path); | |
442 | return -errno; | |
443 | } | |
444 | ||
445 | if (i->uid_set || i->gid_set) | |
446 | if (chown(path, | |
447 | i->uid_set ? i->uid : (uid_t) -1, | |
448 | i->gid_set ? i->gid : (gid_t) -1) < 0) { | |
449 | ||
450 | log_error("chown(%s) failed: %m", path); | |
451 | return -errno; | |
452 | } | |
453 | ||
454 | return label_fix(path, false); | |
455 | } | |
456 | ||
457 | static int recursive_relabel_children(Item *i, const char *path) { | |
458 | DIR *d; | |
459 | int ret = 0; | |
460 | ||
461 | /* This returns the first error we run into, but nevertheless | |
462 | * tries to go on */ | |
463 | ||
464 | d = opendir(path); | |
465 | if (!d) | |
466 | return errno == ENOENT ? 0 : -errno; | |
467 | ||
468 | for (;;) { | |
469 | struct dirent buf, *de; | |
470 | bool is_dir; | |
471 | int r; | |
472 | char *entry_path; | |
473 | ||
474 | r = readdir_r(d, &buf, &de); | |
475 | if (r != 0) { | |
476 | if (ret == 0) | |
477 | ret = -r; | |
478 | break; | |
479 | } | |
480 | ||
481 | if (!de) | |
482 | break; | |
483 | ||
484 | if (streq(de->d_name, ".") || streq(de->d_name, "..")) | |
485 | continue; | |
486 | ||
487 | if (asprintf(&entry_path, "%s/%s", path, de->d_name) < 0) { | |
488 | if (ret == 0) | |
489 | ret = -ENOMEM; | |
490 | continue; | |
491 | } | |
492 | ||
493 | if (de->d_type == DT_UNKNOWN) { | |
494 | struct stat st; | |
495 | ||
496 | if (lstat(entry_path, &st) < 0) { | |
497 | if (ret == 0 && errno != ENOENT) | |
498 | ret = -errno; | |
499 | free(entry_path); | |
500 | continue; | |
501 | } | |
502 | ||
503 | is_dir = S_ISDIR(st.st_mode); | |
504 | ||
505 | } else | |
506 | is_dir = de->d_type == DT_DIR; | |
507 | ||
508 | r = item_set_perms(i, entry_path); | |
509 | if (r < 0) { | |
510 | if (ret == 0 && r != -ENOENT) | |
511 | ret = r; | |
512 | free(entry_path); | |
513 | continue; | |
514 | } | |
515 | ||
516 | if (is_dir) { | |
517 | r = recursive_relabel_children(i, entry_path); | |
518 | if (r < 0 && ret == 0) | |
519 | ret = r; | |
520 | } | |
521 | ||
522 | free(entry_path); | |
523 | } | |
524 | ||
525 | closedir(d); | |
526 | ||
527 | return ret; | |
528 | } | |
529 | ||
530 | static int recursive_relabel(Item *i, const char *path) { | |
531 | int r; | |
532 | struct stat st; | |
533 | ||
534 | r = item_set_perms(i, path); | |
535 | if (r < 0) | |
536 | return r; | |
537 | ||
538 | if (lstat(path, &st) < 0) | |
539 | return -errno; | |
540 | ||
541 | if (S_ISDIR(st.st_mode)) | |
542 | r = recursive_relabel_children(i, path); | |
543 | ||
544 | return r; | |
545 | } | |
546 | ||
547 | static int glob_item(Item *i, int (*action)(Item *, const char *)) { | |
548 | int r = 0, k; | |
549 | glob_t g; | |
550 | char **fn; | |
551 | ||
552 | zero(g); | |
553 | ||
554 | errno = 0; | |
555 | if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) { | |
556 | ||
557 | if (k != GLOB_NOMATCH) { | |
558 | if (errno != 0) | |
559 | errno = EIO; | |
560 | ||
561 | log_error("glob(%s) failed: %m", i->path); | |
562 | return -errno; | |
563 | } | |
564 | } | |
565 | ||
566 | STRV_FOREACH(fn, g.gl_pathv) | |
567 | if ((k = action(i, *fn)) < 0) | |
568 | r = k; | |
569 | ||
570 | globfree(&g); | |
571 | return r; | |
572 | } | |
573 | ||
574 | static int create_item(Item *i) { | |
575 | int r, e; | |
576 | mode_t u; | |
577 | struct stat st; | |
578 | ||
579 | assert(i); | |
580 | ||
581 | switch (i->type) { | |
582 | ||
583 | case IGNORE_PATH: | |
584 | case REMOVE_PATH: | |
585 | case RECURSIVE_REMOVE_PATH: | |
586 | return 0; | |
587 | ||
588 | case CREATE_FILE: | |
589 | case TRUNCATE_FILE: | |
590 | case WRITE_FILE: { | |
591 | int fd, flags; | |
592 | ||
593 | flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND : | |
594 | i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC : 0; | |
595 | ||
596 | u = umask(0); | |
597 | label_context_set(i->path, S_IFREG); | |
598 | fd = open(i->path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW, i->mode); | |
599 | e = errno; | |
600 | label_context_clear(); | |
601 | umask(u); | |
602 | errno = e; | |
603 | ||
604 | if (fd < 0) { | |
605 | if (i->type == WRITE_FILE && errno == ENOENT) | |
606 | break; | |
607 | ||
608 | log_error("Failed to create file %s: %m", i->path); | |
609 | return -errno; | |
610 | } | |
611 | ||
612 | if (i->argument) { | |
613 | ssize_t n; | |
614 | size_t l; | |
615 | struct iovec iovec[2]; | |
616 | static const char new_line = '\n'; | |
617 | ||
618 | l = strlen(i->argument); | |
619 | ||
620 | zero(iovec); | |
621 | iovec[0].iov_base = i->argument; | |
622 | iovec[0].iov_len = l; | |
623 | ||
624 | iovec[1].iov_base = (void*) &new_line; | |
625 | iovec[1].iov_len = 1; | |
626 | ||
627 | n = writev(fd, iovec, 2); | |
628 | ||
629 | /* It's OK if we don't write the trailing | |
630 | * newline, hence we check for l, instead of | |
631 | * l+1 here. Files in /sys often refuse | |
632 | * writing of the trailing newline. */ | |
633 | if (n < 0 || (size_t) n < l) { | |
634 | log_error("Failed to write file %s: %s", i->path, n < 0 ? strerror(-n) : "Short write"); | |
635 | close_nointr_nofail(fd); | |
636 | return n < 0 ? n : -EIO; | |
637 | } | |
638 | } | |
639 | ||
640 | close_nointr_nofail(fd); | |
641 | ||
642 | if (stat(i->path, &st) < 0) { | |
643 | log_error("stat(%s) failed: %m", i->path); | |
644 | return -errno; | |
645 | } | |
646 | ||
647 | if (!S_ISREG(st.st_mode)) { | |
648 | log_error("%s is not a file.", i->path); | |
649 | return -EEXIST; | |
650 | } | |
651 | ||
652 | r = item_set_perms(i, i->path); | |
653 | if (r < 0) | |
654 | return r; | |
655 | ||
656 | break; | |
657 | } | |
658 | ||
659 | case TRUNCATE_DIRECTORY: | |
660 | case CREATE_DIRECTORY: | |
661 | ||
662 | u = umask(0); | |
663 | mkdir_parents_label(i->path, 0755); | |
664 | r = mkdir(i->path, i->mode); | |
665 | umask(u); | |
666 | ||
667 | if (r < 0 && errno != EEXIST) { | |
668 | log_error("Failed to create directory %s: %m", i->path); | |
669 | return -errno; | |
670 | } | |
671 | ||
672 | if (stat(i->path, &st) < 0) { | |
673 | log_error("stat(%s) failed: %m", i->path); | |
674 | return -errno; | |
675 | } | |
676 | ||
677 | if (!S_ISDIR(st.st_mode)) { | |
678 | log_error("%s is not a directory.", i->path); | |
679 | return -EEXIST; | |
680 | } | |
681 | ||
682 | r = item_set_perms(i, i->path); | |
683 | if (r < 0) | |
684 | return r; | |
685 | ||
686 | break; | |
687 | ||
688 | case CREATE_FIFO: | |
689 | ||
690 | u = umask(0); | |
691 | r = mkfifo(i->path, i->mode); | |
692 | umask(u); | |
693 | ||
694 | if (r < 0 && errno != EEXIST) { | |
695 | log_error("Failed to create fifo %s: %m", i->path); | |
696 | return -errno; | |
697 | } | |
698 | ||
699 | if (stat(i->path, &st) < 0) { | |
700 | log_error("stat(%s) failed: %m", i->path); | |
701 | return -errno; | |
702 | } | |
703 | ||
704 | if (!S_ISFIFO(st.st_mode)) { | |
705 | log_error("%s is not a fifo.", i->path); | |
706 | return -EEXIST; | |
707 | } | |
708 | ||
709 | r = item_set_perms(i, i->path); | |
710 | if (r < 0) | |
711 | return r; | |
712 | ||
713 | break; | |
714 | ||
715 | case CREATE_SYMLINK: { | |
716 | char *x; | |
717 | ||
718 | label_context_set(i->path, S_IFLNK); | |
719 | r = symlink(i->argument, i->path); | |
720 | e = errno; | |
721 | label_context_clear(); | |
722 | errno = e; | |
723 | ||
724 | if (r < 0 && errno != EEXIST) { | |
725 | log_error("symlink(%s, %s) failed: %m", i->argument, i->path); | |
726 | return -errno; | |
727 | } | |
728 | ||
729 | r = readlink_malloc(i->path, &x); | |
730 | if (r < 0) { | |
731 | log_error("readlink(%s) failed: %s", i->path, strerror(-r)); | |
732 | return -errno; | |
733 | } | |
734 | ||
735 | if (!streq(i->argument, x)) { | |
736 | free(x); | |
737 | log_error("%s is not the right symlinks.", i->path); | |
738 | return -EEXIST; | |
739 | } | |
740 | ||
741 | free(x); | |
742 | break; | |
743 | } | |
744 | ||
745 | case CREATE_BLOCK_DEVICE: | |
746 | case CREATE_CHAR_DEVICE: { | |
747 | ||
748 | u = umask(0); | |
749 | label_context_set(i->path, CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR); | |
750 | r = mknod(i->path, i->mode | (i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR), i->major_minor); | |
751 | e = errno; | |
752 | label_context_clear(); | |
753 | umask(u); | |
754 | errno = e; | |
755 | ||
756 | if (r < 0 && errno != EEXIST) { | |
757 | log_error("Failed to create device node %s: %m", i->path); | |
758 | return -errno; | |
759 | } | |
760 | ||
761 | if (stat(i->path, &st) < 0) { | |
762 | log_error("stat(%s) failed: %m", i->path); | |
763 | return -errno; | |
764 | } | |
765 | ||
766 | if (i->type == CREATE_BLOCK_DEVICE ? !S_ISBLK(st.st_mode) : !S_ISCHR(st.st_mode)) { | |
767 | log_error("%s is not a device node.", i->path); | |
768 | return -EEXIST; | |
769 | } | |
770 | ||
771 | r = item_set_perms(i, i->path); | |
772 | if (r < 0) | |
773 | return r; | |
774 | ||
775 | break; | |
776 | } | |
777 | ||
778 | case RELABEL_PATH: | |
779 | ||
780 | r = glob_item(i, item_set_perms); | |
781 | if (r < 0) | |
782 | return 0; | |
783 | break; | |
784 | ||
785 | case RECURSIVE_RELABEL_PATH: | |
786 | ||
787 | r = glob_item(i, recursive_relabel); | |
788 | if (r < 0) | |
789 | return r; | |
790 | } | |
791 | ||
792 | log_debug("%s created successfully.", i->path); | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | static int remove_item_instance(Item *i, const char *instance) { | |
798 | int r; | |
799 | ||
800 | assert(i); | |
801 | ||
802 | switch (i->type) { | |
803 | ||
804 | case CREATE_FILE: | |
805 | case TRUNCATE_FILE: | |
806 | case CREATE_DIRECTORY: | |
807 | case CREATE_FIFO: | |
808 | case CREATE_SYMLINK: | |
809 | case CREATE_BLOCK_DEVICE: | |
810 | case CREATE_CHAR_DEVICE: | |
811 | case IGNORE_PATH: | |
812 | case RELABEL_PATH: | |
813 | case RECURSIVE_RELABEL_PATH: | |
814 | case WRITE_FILE: | |
815 | break; | |
816 | ||
817 | case REMOVE_PATH: | |
818 | if (remove(instance) < 0 && errno != ENOENT) { | |
819 | log_error("remove(%s): %m", instance); | |
820 | return -errno; | |
821 | } | |
822 | ||
823 | break; | |
824 | ||
825 | case TRUNCATE_DIRECTORY: | |
826 | case RECURSIVE_REMOVE_PATH: | |
827 | r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false); | |
828 | if (r < 0 && r != -ENOENT) { | |
829 | log_error("rm_rf(%s): %s", instance, strerror(-r)); | |
830 | return r; | |
831 | } | |
832 | ||
833 | break; | |
834 | } | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
839 | static int remove_item(Item *i) { | |
840 | int r = 0; | |
841 | ||
842 | assert(i); | |
843 | ||
844 | switch (i->type) { | |
845 | ||
846 | case CREATE_FILE: | |
847 | case TRUNCATE_FILE: | |
848 | case CREATE_DIRECTORY: | |
849 | case CREATE_FIFO: | |
850 | case CREATE_SYMLINK: | |
851 | case CREATE_CHAR_DEVICE: | |
852 | case CREATE_BLOCK_DEVICE: | |
853 | case IGNORE_PATH: | |
854 | case RELABEL_PATH: | |
855 | case RECURSIVE_RELABEL_PATH: | |
856 | case WRITE_FILE: | |
857 | break; | |
858 | ||
859 | case REMOVE_PATH: | |
860 | case TRUNCATE_DIRECTORY: | |
861 | case RECURSIVE_REMOVE_PATH: | |
862 | r = glob_item(i, remove_item_instance); | |
863 | break; | |
864 | } | |
865 | ||
866 | return r; | |
867 | } | |
868 | ||
869 | static int process_item(Item *i) { | |
870 | int r, q, p; | |
871 | ||
872 | assert(i); | |
873 | ||
874 | r = arg_create ? create_item(i) : 0; | |
875 | q = arg_remove ? remove_item(i) : 0; | |
876 | p = arg_clean ? clean_item(i) : 0; | |
877 | ||
878 | if (r < 0) | |
879 | return r; | |
880 | ||
881 | if (q < 0) | |
882 | return q; | |
883 | ||
884 | return p; | |
885 | } | |
886 | ||
887 | static void item_free(Item *i) { | |
888 | assert(i); | |
889 | ||
890 | free(i->path); | |
891 | free(i->argument); | |
892 | free(i); | |
893 | } | |
894 | ||
895 | static bool item_equal(Item *a, Item *b) { | |
896 | assert(a); | |
897 | assert(b); | |
898 | ||
899 | if (!streq_ptr(a->path, b->path)) | |
900 | return false; | |
901 | ||
902 | if (a->type != b->type) | |
903 | return false; | |
904 | ||
905 | if (a->uid_set != b->uid_set || | |
906 | (a->uid_set && a->uid != b->uid)) | |
907 | return false; | |
908 | ||
909 | if (a->gid_set != b->gid_set || | |
910 | (a->gid_set && a->gid != b->gid)) | |
911 | return false; | |
912 | ||
913 | if (a->mode_set != b->mode_set || | |
914 | (a->mode_set && a->mode != b->mode)) | |
915 | return false; | |
916 | ||
917 | if (a->age_set != b->age_set || | |
918 | (a->age_set && a->age != b->age)) | |
919 | return false; | |
920 | ||
921 | if ((a->type == CREATE_FILE || | |
922 | a->type == TRUNCATE_FILE || | |
923 | a->type == WRITE_FILE || | |
924 | a->type == CREATE_SYMLINK) && | |
925 | !streq_ptr(a->argument, b->argument)) | |
926 | return false; | |
927 | ||
928 | if ((a->type == CREATE_CHAR_DEVICE || | |
929 | a->type == CREATE_BLOCK_DEVICE) && | |
930 | a->major_minor != b->major_minor) | |
931 | return false; | |
932 | ||
933 | return true; | |
934 | } | |
935 | ||
936 | static int parse_line(const char *fname, unsigned line, const char *buffer) { | |
937 | Item *i, *existing; | |
938 | char *mode = NULL, *user = NULL, *group = NULL, *age = NULL; | |
939 | char type; | |
940 | Hashmap *h; | |
941 | int r, n = -1; | |
942 | ||
943 | assert(fname); | |
944 | assert(line >= 1); | |
945 | assert(buffer); | |
946 | ||
947 | i = new0(Item, 1); | |
948 | if (!i) { | |
949 | log_error("Out of memory"); | |
950 | return -ENOMEM; | |
951 | } | |
952 | ||
953 | if (sscanf(buffer, | |
954 | "%c " | |
955 | "%ms " | |
956 | "%ms " | |
957 | "%ms " | |
958 | "%ms " | |
959 | "%ms " | |
960 | "%n", | |
961 | &type, | |
962 | &i->path, | |
963 | &mode, | |
964 | &user, | |
965 | &group, | |
966 | &age, | |
967 | &n) < 2) { | |
968 | log_error("[%s:%u] Syntax error.", fname, line); | |
969 | r = -EIO; | |
970 | goto finish; | |
971 | } | |
972 | ||
973 | if (n >= 0) { | |
974 | n += strspn(buffer+n, WHITESPACE); | |
975 | if (buffer[n] != 0 && (buffer[n] != '-' || buffer[n+1] != 0)) { | |
976 | i->argument = unquote(buffer+n, "\""); | |
977 | if (!i->argument) { | |
978 | log_error("Out of memory"); | |
979 | return -ENOMEM; | |
980 | } | |
981 | } | |
982 | } | |
983 | ||
984 | switch(type) { | |
985 | ||
986 | case CREATE_FILE: | |
987 | case TRUNCATE_FILE: | |
988 | case CREATE_DIRECTORY: | |
989 | case TRUNCATE_DIRECTORY: | |
990 | case CREATE_FIFO: | |
991 | case IGNORE_PATH: | |
992 | case REMOVE_PATH: | |
993 | case RECURSIVE_REMOVE_PATH: | |
994 | case RELABEL_PATH: | |
995 | case RECURSIVE_RELABEL_PATH: | |
996 | break; | |
997 | ||
998 | case CREATE_SYMLINK: | |
999 | if (!i->argument) { | |
1000 | log_error("[%s:%u] Symlink file requires argument.", fname, line); | |
1001 | r = -EBADMSG; | |
1002 | goto finish; | |
1003 | } | |
1004 | break; | |
1005 | ||
1006 | case WRITE_FILE: | |
1007 | if (!i->argument) { | |
1008 | log_error("[%s:%u] Write file requires argument.", fname, line); | |
1009 | r = -EBADMSG; | |
1010 | goto finish; | |
1011 | } | |
1012 | break; | |
1013 | ||
1014 | case CREATE_CHAR_DEVICE: | |
1015 | case CREATE_BLOCK_DEVICE: { | |
1016 | unsigned major, minor; | |
1017 | ||
1018 | if (!i->argument) { | |
1019 | log_error("[%s:%u] Device file requires argument.", fname, line); | |
1020 | r = -EBADMSG; | |
1021 | goto finish; | |
1022 | } | |
1023 | ||
1024 | if (sscanf(i->argument, "%u:%u", &major, &minor) != 2) { | |
1025 | log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i->argument); | |
1026 | r = -EBADMSG; | |
1027 | goto finish; | |
1028 | } | |
1029 | ||
1030 | i->major_minor = makedev(major, minor); | |
1031 | break; | |
1032 | } | |
1033 | ||
1034 | default: | |
1035 | log_error("[%s:%u] Unknown file type '%c'.", fname, line, type); | |
1036 | r = -EBADMSG; | |
1037 | goto finish; | |
1038 | } | |
1039 | ||
1040 | i->type = type; | |
1041 | ||
1042 | if (!path_is_absolute(i->path)) { | |
1043 | log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path); | |
1044 | r = -EBADMSG; | |
1045 | goto finish; | |
1046 | } | |
1047 | ||
1048 | path_kill_slashes(i->path); | |
1049 | ||
1050 | if (arg_prefix && !path_startswith(i->path, arg_prefix)) { | |
1051 | r = 0; | |
1052 | goto finish; | |
1053 | } | |
1054 | ||
1055 | if (user && !streq(user, "-")) { | |
1056 | const char *u = user; | |
1057 | ||
1058 | r = get_user_creds(&u, &i->uid, NULL, NULL); | |
1059 | if (r < 0) { | |
1060 | log_error("[%s:%u] Unknown user '%s'.", fname, line, user); | |
1061 | goto finish; | |
1062 | } | |
1063 | ||
1064 | i->uid_set = true; | |
1065 | } | |
1066 | ||
1067 | if (group && !streq(group, "-")) { | |
1068 | const char *g = group; | |
1069 | ||
1070 | r = get_group_creds(&g, &i->gid); | |
1071 | if (r < 0) { | |
1072 | log_error("[%s:%u] Unknown group '%s'.", fname, line, group); | |
1073 | goto finish; | |
1074 | } | |
1075 | ||
1076 | i->gid_set = true; | |
1077 | } | |
1078 | ||
1079 | if (mode && !streq(mode, "-")) { | |
1080 | unsigned m; | |
1081 | ||
1082 | if (sscanf(mode, "%o", &m) != 1) { | |
1083 | log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode); | |
1084 | r = -ENOENT; | |
1085 | goto finish; | |
1086 | } | |
1087 | ||
1088 | i->mode = m; | |
1089 | i->mode_set = true; | |
1090 | } else | |
1091 | i->mode = | |
1092 | i->type == CREATE_DIRECTORY || | |
1093 | i->type == TRUNCATE_DIRECTORY ? 0755 : 0644; | |
1094 | ||
1095 | if (age && !streq(age, "-")) { | |
1096 | if (parse_usec(age, &i->age) < 0) { | |
1097 | log_error("[%s:%u] Invalid age '%s'.", fname, line, age); | |
1098 | r = -EBADMSG; | |
1099 | goto finish; | |
1100 | } | |
1101 | ||
1102 | i->age_set = true; | |
1103 | } | |
1104 | ||
1105 | h = needs_glob(i->type) ? globs : items; | |
1106 | ||
1107 | existing = hashmap_get(h, i->path); | |
1108 | if (existing) { | |
1109 | ||
1110 | /* Two identical items are fine */ | |
1111 | if (!item_equal(existing, i)) | |
1112 | log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path); | |
1113 | ||
1114 | r = 0; | |
1115 | goto finish; | |
1116 | } | |
1117 | ||
1118 | r = hashmap_put(h, i->path, i); | |
1119 | if (r < 0) { | |
1120 | log_error("Failed to insert item %s: %s", i->path, strerror(-r)); | |
1121 | goto finish; | |
1122 | } | |
1123 | ||
1124 | i = NULL; | |
1125 | r = 0; | |
1126 | ||
1127 | finish: | |
1128 | free(user); | |
1129 | free(group); | |
1130 | free(mode); | |
1131 | free(age); | |
1132 | ||
1133 | if (i) | |
1134 | item_free(i); | |
1135 | ||
1136 | return r; | |
1137 | } | |
1138 | ||
1139 | static int help(void) { | |
1140 | ||
1141 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" | |
1142 | "Creates, deletes and cleans up volatile and temporary files and directories.\n\n" | |
1143 | " -h --help Show this help\n" | |
1144 | " --create Create marked files/directories\n" | |
1145 | " --clean Clean up marked directories\n" | |
1146 | " --remove Remove marked files/directories\n" | |
1147 | " --prefix=PATH Only apply rules that apply to paths with the specified prefix\n", | |
1148 | program_invocation_short_name); | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | static int parse_argv(int argc, char *argv[]) { | |
1154 | ||
1155 | enum { | |
1156 | ARG_CREATE, | |
1157 | ARG_CLEAN, | |
1158 | ARG_REMOVE, | |
1159 | ARG_PREFIX | |
1160 | }; | |
1161 | ||
1162 | static const struct option options[] = { | |
1163 | { "help", no_argument, NULL, 'h' }, | |
1164 | { "create", no_argument, NULL, ARG_CREATE }, | |
1165 | { "clean", no_argument, NULL, ARG_CLEAN }, | |
1166 | { "remove", no_argument, NULL, ARG_REMOVE }, | |
1167 | { "prefix", required_argument, NULL, ARG_PREFIX }, | |
1168 | { NULL, 0, NULL, 0 } | |
1169 | }; | |
1170 | ||
1171 | int c; | |
1172 | ||
1173 | assert(argc >= 0); | |
1174 | assert(argv); | |
1175 | ||
1176 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
1177 | ||
1178 | switch (c) { | |
1179 | ||
1180 | case 'h': | |
1181 | help(); | |
1182 | return 0; | |
1183 | ||
1184 | case ARG_CREATE: | |
1185 | arg_create = true; | |
1186 | break; | |
1187 | ||
1188 | case ARG_CLEAN: | |
1189 | arg_clean = true; | |
1190 | break; | |
1191 | ||
1192 | case ARG_REMOVE: | |
1193 | arg_remove = true; | |
1194 | break; | |
1195 | ||
1196 | case ARG_PREFIX: | |
1197 | arg_prefix = optarg; | |
1198 | break; | |
1199 | ||
1200 | case '?': | |
1201 | return -EINVAL; | |
1202 | ||
1203 | default: | |
1204 | log_error("Unknown option code %c", c); | |
1205 | return -EINVAL; | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | if (!arg_clean && !arg_create && !arg_remove) { | |
1210 | log_error("You need to specify at least one of --clean, --create or --remove."); | |
1211 | return -EINVAL; | |
1212 | } | |
1213 | ||
1214 | return 1; | |
1215 | } | |
1216 | ||
1217 | static int read_config_file(const char *fn, bool ignore_enoent) { | |
1218 | FILE *f; | |
1219 | unsigned v = 0; | |
1220 | int r = 0; | |
1221 | ||
1222 | assert(fn); | |
1223 | ||
1224 | f = fopen(fn, "re"); | |
1225 | if (!f) { | |
1226 | ||
1227 | if (ignore_enoent && errno == ENOENT) | |
1228 | return 0; | |
1229 | ||
1230 | log_error("Failed to open %s: %m", fn); | |
1231 | return -errno; | |
1232 | } | |
1233 | ||
1234 | log_debug("apply: %s\n", fn); | |
1235 | for (;;) { | |
1236 | char line[LINE_MAX], *l; | |
1237 | int k; | |
1238 | ||
1239 | if (!(fgets(line, sizeof(line), f))) | |
1240 | break; | |
1241 | ||
1242 | v++; | |
1243 | ||
1244 | l = strstrip(line); | |
1245 | if (*l == '#' || *l == 0) | |
1246 | continue; | |
1247 | ||
1248 | if ((k = parse_line(fn, v, l)) < 0) | |
1249 | if (r == 0) | |
1250 | r = k; | |
1251 | } | |
1252 | ||
1253 | if (ferror(f)) { | |
1254 | log_error("Failed to read from file %s: %m", fn); | |
1255 | if (r == 0) | |
1256 | r = -EIO; | |
1257 | } | |
1258 | ||
1259 | fclose(f); | |
1260 | ||
1261 | return r; | |
1262 | } | |
1263 | ||
1264 | static char *resolve_fragment(const char *fragment, const char **search_paths) { | |
1265 | const char **p; | |
1266 | char *resolved_path; | |
1267 | ||
1268 | if (is_path(fragment)) | |
1269 | return strdup(fragment); | |
1270 | ||
1271 | STRV_FOREACH(p, search_paths) { | |
1272 | resolved_path = join(*p, "/", fragment, NULL); | |
1273 | if (resolved_path == NULL) { | |
1274 | log_error("Out of memory"); | |
1275 | return NULL; | |
1276 | } | |
1277 | ||
1278 | if (access(resolved_path, F_OK) == 0) | |
1279 | return resolved_path; | |
1280 | ||
1281 | free(resolved_path); | |
1282 | } | |
1283 | ||
1284 | errno = ENOENT; | |
1285 | return NULL; | |
1286 | } | |
1287 | ||
1288 | int main(int argc, char *argv[]) { | |
1289 | int r; | |
1290 | Item *i; | |
1291 | Iterator iterator; | |
1292 | ||
1293 | r = parse_argv(argc, argv); | |
1294 | if (r <= 0) | |
1295 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1296 | ||
1297 | log_set_target(LOG_TARGET_AUTO); | |
1298 | log_parse_environment(); | |
1299 | log_open(); | |
1300 | ||
1301 | umask(0022); | |
1302 | ||
1303 | label_init(NULL); | |
1304 | ||
1305 | items = hashmap_new(string_hash_func, string_compare_func); | |
1306 | globs = hashmap_new(string_hash_func, string_compare_func); | |
1307 | ||
1308 | if (!items || !globs) { | |
1309 | log_error("Out of memory"); | |
1310 | r = EXIT_FAILURE; | |
1311 | goto finish; | |
1312 | } | |
1313 | ||
1314 | r = EXIT_SUCCESS; | |
1315 | ||
1316 | if (optind < argc) { | |
1317 | int j; | |
1318 | ||
1319 | for (j = optind; j < argc; j++) { | |
1320 | char *fragment; | |
1321 | ||
1322 | fragment = resolve_fragment(argv[j], conf_file_dirs); | |
1323 | if (!fragment) { | |
1324 | log_error("Failed to find a %s file: %m", argv[j]); | |
1325 | r = EXIT_FAILURE; | |
1326 | goto finish; | |
1327 | } | |
1328 | if (read_config_file(fragment, false) < 0) | |
1329 | r = EXIT_FAILURE; | |
1330 | free(fragment); | |
1331 | } | |
1332 | ||
1333 | } else { | |
1334 | char **files, **f; | |
1335 | ||
1336 | r = conf_files_list_strv(&files, ".conf", | |
1337 | (const char **)conf_file_dirs); | |
1338 | if (r < 0) { | |
1339 | log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r)); | |
1340 | r = EXIT_FAILURE; | |
1341 | goto finish; | |
1342 | } | |
1343 | ||
1344 | STRV_FOREACH(f, files) { | |
1345 | if (read_config_file(*f, true) < 0) | |
1346 | r = EXIT_FAILURE; | |
1347 | } | |
1348 | ||
1349 | strv_free(files); | |
1350 | } | |
1351 | ||
1352 | HASHMAP_FOREACH(i, globs, iterator) | |
1353 | process_item(i); | |
1354 | ||
1355 | HASHMAP_FOREACH(i, items, iterator) | |
1356 | process_item(i); | |
1357 | ||
1358 | finish: | |
1359 | while ((i = hashmap_steal_first(items))) | |
1360 | item_free(i); | |
1361 | ||
1362 | while ((i = hashmap_steal_first(globs))) | |
1363 | item_free(i); | |
1364 | ||
1365 | hashmap_free(items); | |
1366 | hashmap_free(globs); | |
1367 | ||
1368 | set_free_free(unix_sockets); | |
1369 | ||
1370 | label_finish(); | |
1371 | ||
1372 | return r; | |
1373 | } |