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chattr: optionally, return the old flags when updating them
[thirdparty/systemd.git] / src / tmpfiles / tmpfiles.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
5008d581 2
5008d581 3#include <errno.h>
3f6fd1ba
LP		 4#include <fcntl.h>
5#include <fnmatch.h>
6#include <getopt.h>
7#include <glob.h>
5008d581 8#include <limits.h>
3f6fd1ba
LP		 9#include <linux/fs.h>
10#include <stdbool.h>
11#include <stddef.h>
3b63d2d3
LP		 12#include <stdio.h>
13#include <stdlib.h>
3f6fd1ba 14#include <string.h>
505ef0e3 15#include <sys/stat.h>
ebf4e801 16#include <sys/xattr.h>
d9daae55 17#include <sysexits.h>
3f6fd1ba
LP		 18#include <time.h>
19#include <unistd.h>
5008d581 20
5a8575ef
ZJS		 21#include "sd-path.h"
22
3f6fd1ba 23#include "acl-util.h"
b5efdb8a 24#include "alloc-util.h"
3f6fd1ba 25#include "btrfs-util.h"
430f0182 26#include "capability-util.h"
c8b3094d 27#include "chattr-util.h"
3f6fd1ba
LP		 28#include "conf-files.h"
29#include "copy.h"
a0f29c76 30#include "def.h"
8fb3f009 31#include "dirent-util.h"
4f5dd394 32#include "escape.h"
3ffd4af2 33#include "fd-util.h"
0d39fa9c 34#include "fileio.h"
f97b34a6 35#include "format-util.h"
f4f15635 36#include "fs-util.h"
7d50b32a 37#include "glob-util.h"
c004493c 38#include "io-util.h"
3f6fd1ba 39#include "label.h"
5008d581 40#include "log.h"
54693d9b 41#include "macro.h"
d39efe74 42#include "missing.h"
49e942b2 43#include "mkdir.h"
4e036b7a 44#include "mount-util.h"
dcd5c891 45#include "pager.h"
6bedfcbb 46#include "parse-util.h"
f2b5ca0e 47#include "path-lookup.h"
9eb977db 48#include "path-util.h"
c6878637 49#include "rm-rf.h"
d7b8eec7 50#include "selinux-util.h"
3f6fd1ba
LP		 51#include "set.h"
52#include "specifier.h"
8fcde012 53#include "stat-util.h"
15a5e950 54#include "stdio-util.h"
8b43440b 55#include "string-table.h"
07630cea 56#include "string-util.h"
3f6fd1ba 57#include "strv.h"
ceaaeb9b 58#include "terminal-util.h"
affb60b1 59#include "umask-util.h"
b1d4f8e1 60#include "user-util.h"
3f6fd1ba 61#include "util.h"
5008d581 62
01000479 63/* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
5008d581 64 * them in the file system. This is intended to be used to create
db019b8d
KS		 65 * properly owned directories beneath /tmp, /var/tmp, /run, which are
66 * volatile and hence need to be recreated on bootup. */
5008d581 67
66ccd038 68typedef enum ItemType {
b8bb3e8f 69 /* These ones take file names */
3b63d2d3
LP		 70 CREATE_FILE = 'f',
71 TRUNCATE_FILE = 'F',
72 CREATE_DIRECTORY = 'd',
73 TRUNCATE_DIRECTORY = 'D',
d7b8eec7 74 CREATE_SUBVOLUME = 'v',
5fb13eb5
LP		 75 CREATE_SUBVOLUME_INHERIT_QUOTA = 'q',
76 CREATE_SUBVOLUME_NEW_QUOTA = 'Q',
ee17ee7c 77 CREATE_FIFO = 'p',
468d726b
LP		 78 CREATE_SYMLINK = 'L',
79 CREATE_CHAR_DEVICE = 'c',
80 CREATE_BLOCK_DEVICE = 'b',
849958d1 81 COPY_FILES = 'C',
b8bb3e8f
LP		 82
83 /* These ones take globs */
17493fa5 84 WRITE_FILE = 'w',
df8dee85 85 EMPTY_DIRECTORY = 'e',
b705ab6a
ZJS		 86 SET_XATTR = 't',
87 RECURSIVE_SET_XATTR = 'T',
88 SET_ACL = 'a',
89 RECURSIVE_SET_ACL = 'A',
17493fa5
LP		 90 SET_ATTRIBUTE = 'h',
91 RECURSIVE_SET_ATTRIBUTE = 'H',
3b63d2d3 92 IGNORE_PATH = 'x',
78a92a5a 93 IGNORE_DIRECTORY_PATH = 'X',
3b63d2d3 94 REMOVE_PATH = 'r',
a8d88783 95 RECURSIVE_REMOVE_PATH = 'R',
777b87e7 96 RELABEL_PATH = 'z',
e73a03e0 97 RECURSIVE_RELABEL_PATH = 'Z',
17493fa5 98 ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */
66ccd038 99} ItemType;
3b63d2d3
LP		 100
101typedef struct Item {
66ccd038 102 ItemType type;
3b63d2d3
LP		 103
104 char *path;
468d726b 105 char *argument;
ebf4e801 106 char **xattrs;
349cc4a5 107#if HAVE_ACL
f8eeeaf9
ZJS		 108 acl_t acl_access;
109 acl_t acl_default;
110#endif
5008d581
LP		 111 uid_t uid;
112 gid_t gid;
3b63d2d3
LP		 113 mode_t mode;
114 usec_t age;
115
468d726b 116 dev_t major_minor;
88ec4dfa
LP		 117 unsigned attribute_value;
118 unsigned attribute_mask;
468d726b 119
3b63d2d3
LP		 120 bool uid_set:1;
121 bool gid_set:1;
122 bool mode_set:1;
123 bool age_set:1;
abef3f91 124 bool mask_perms:1;
88ec4dfa 125 bool attribute_set:1;
24f3a374
LP		 126
127 bool keep_first_level:1;
1910cd0e 128
2e78fa79
LP		 129 bool force:1;
130
6d7b5433
WD		 131 bool allow_failure:1;
132
1910cd0e 133 bool done:1;
3b63d2d3
LP		 134} Item;
135
3f93da98
ZJS		 136typedef struct ItemArray {
137 Item *items;
138 size_t count;
139 size_t size;
140} ItemArray;
141
5a8575ef
ZJS		 142typedef enum DirectoryType {
143 DIRECTORY_RUNTIME = 0,
144 DIRECTORY_STATE,
145 DIRECTORY_CACHE,
146 DIRECTORY_LOGS,
147 _DIRECTORY_TYPE_MAX,
148} DirectoryType;
149
ceaaeb9b 150static bool arg_cat_config = false;
f2b5ca0e 151static bool arg_user = false;
3b63d2d3
LP		 152static bool arg_create = false;
153static bool arg_clean = false;
154static bool arg_remove = false;
81815651 155static bool arg_boot = false;
dcd5c891 156static bool arg_no_pager = false;
3b63d2d3 157
7bc040fa
LP		 158static char **arg_include_prefixes = NULL;
159static char **arg_exclude_prefixes = NULL;
cf9a4abd 160static char *arg_root = NULL;
a6d8474f 161static char *arg_replace = NULL;
fba6e687 162
3b63d2d3
LP		 163#define MAX_DEPTH 256
164
ef43a391 165static OrderedHashmap *items = NULL, *globs = NULL;
7bc040fa
LP		 166static Set *unix_sockets = NULL;
167
4cef1923 168static int specifier_machine_id_safe(char specifier, void *data, void *userdata, char **ret);
5a8575ef 169static int specifier_directory(char specifier, void *data, void *userdata, char **ret);
4cef1923 170
bd550f78 171static const Specifier specifier_table[] = {
4cef1923 172 { 'm', specifier_machine_id_safe, NULL },
5a8575ef
ZJS		 173 { 'b', specifier_boot_id, NULL },
174 { 'H', specifier_host_name, NULL },
175 { 'v', specifier_kernel_release, NULL },
176
177 { 'U', specifier_user_id, NULL },
178 { 'u', specifier_user_name, NULL },
179 { 'h', specifier_user_home, NULL },
b294e594 180
5a8575ef
ZJS		 181 { 't', specifier_directory, UINT_TO_PTR(DIRECTORY_RUNTIME) },
182 { 'S', specifier_directory, UINT_TO_PTR(DIRECTORY_STATE) },
183 { 'C', specifier_directory, UINT_TO_PTR(DIRECTORY_CACHE) },
184 { 'L', specifier_directory, UINT_TO_PTR(DIRECTORY_LOGS) },
b294e594
LP		 185 { 'T', specifier_tmp_dir, NULL },
186 { 'V', specifier_var_tmp_dir, NULL },
bd550f78
LP		 187 {}
188};
189
4cef1923
FB		 190static int specifier_machine_id_safe(char specifier, void *data, void *userdata, char **ret) {
191 int r;
192
d8dab757
FB		 193 /* If /etc/machine_id is missing or empty (e.g. in a chroot environment)
194 * return a recognizable error so that the caller can skip the rule
4cef1923
FB		 195 * gracefully. */
196
197 r = specifier_machine_id(specifier, data, userdata, ret);
d8dab757 198 if (IN_SET(r, -ENOENT, -ENOMEDIUM))
5a8575ef 199 return -ENXIO;
4cef1923
FB		 200
201 return r;
202}
203
5a8575ef
ZJS		 204static int specifier_directory(char specifier, void *data, void *userdata, char **ret) {
205 struct table_entry {
206 uint64_t type;
207 const char *suffix;
208 };
209
210 static const struct table_entry paths_system[] = {
211 [DIRECTORY_RUNTIME] = { SD_PATH_SYSTEM_RUNTIME },
212 [DIRECTORY_STATE] = { SD_PATH_SYSTEM_STATE_PRIVATE },
213 [DIRECTORY_CACHE] = { SD_PATH_SYSTEM_STATE_CACHE },
214 [DIRECTORY_LOGS] = { SD_PATH_SYSTEM_STATE_LOGS },
215 };
216
217 static const struct table_entry paths_user[] = {
218 [DIRECTORY_RUNTIME] = { SD_PATH_USER_RUNTIME },
219 [DIRECTORY_STATE] = { SD_PATH_USER_CONFIGURATION },
220 [DIRECTORY_CACHE] = { SD_PATH_USER_STATE_CACHE },
221 [DIRECTORY_LOGS] = { SD_PATH_USER_CONFIGURATION, "log" },
222 };
223
224 unsigned i;
225 const struct table_entry *paths;
226
227 assert_cc(ELEMENTSOF(paths_system) == ELEMENTSOF(paths_user));
228 paths = arg_user ? paths_user : paths_system;
229
230 i = PTR_TO_UINT(data);
231 assert(i < ELEMENTSOF(paths_system));
232
233 return sd_path_home(paths[i].type, paths[i].suffix, ret);
234}
235
4cef1923
FB		 236static int log_unresolvable_specifier(const char *filename, unsigned line) {
237 static bool notified = false;
238
5a8575ef
ZJS		 239 /* In system mode, this is called when /etc is not fully initialized (e.g.
240 * in a chroot environment) where some specifiers are unresolvable. In user
241 * mode, this is called when some variables are not defined. These cases are
242 * not considered as an error so log at LOG_NOTICE only for the first time
243 * and then downgrade this to LOG_DEBUG for the rest. */
4cef1923
FB		 244
245 log_full(notified ? LOG_DEBUG : LOG_NOTICE,
5a8575ef
ZJS		 246 "[%s:%u] Failed to resolve specifier: %s, skipping",
247 filename, line,
248 arg_user ? "Required $XDG_... variable not defined" : "uninitialized /etc detected");
4cef1923
FB		 249
250 if (!notified)
251 log_notice("All rules containing unresolvable specifiers will be skipped.");
252
253 notified = true;
254 return 0;
255}
256
f2b5ca0e
ZJS		 257static int user_config_paths(char*** ret) {
258 _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
259 _cleanup_free_ char *persistent_config = NULL, *runtime_config = NULL, *data_home = NULL;
260 _cleanup_strv_free_ char **res = NULL;
261 int r;
262
263 r = xdg_user_dirs(&config_dirs, &data_dirs);
264 if (r < 0)
265 return r;
266
267 r = xdg_user_config_dir(&persistent_config, "/user-tmpfiles.d");
268 if (r < 0 && r != -ENXIO)
269 return r;
270
271 r = xdg_user_runtime_dir(&runtime_config, "/user-tmpfiles.d");
272 if (r < 0 && r != -ENXIO)
273 return r;
274
275 r = xdg_user_data_dir(&data_home, "/user-tmpfiles.d");
276 if (r < 0 && r != -ENXIO)
277 return r;
278
279 r = strv_extend_strv_concat(&res, config_dirs, "/user-tmpfiles.d");
280 if (r < 0)
281 return r;
282
283 r = strv_extend(&res, persistent_config);
284 if (r < 0)
285 return r;
286
287 r = strv_extend(&res, runtime_config);
288 if (r < 0)
289 return r;
290
291 r = strv_extend(&res, data_home);
292 if (r < 0)
293 return r;
294
295 r = strv_extend_strv_concat(&res, data_dirs, "/user-tmpfiles.d");
296 if (r < 0)
297 return r;
298
299 r = path_strv_make_absolute_cwd(res);
300 if (r < 0)
301 return r;
302
ae2a15bc 303 *ret = TAKE_PTR(res);
f2b5ca0e
ZJS		 304 return 0;
305}
306
66ccd038 307static bool needs_glob(ItemType t) {
cde684a2
LP		 308 return IN_SET(t,
309 WRITE_FILE,
310 IGNORE_PATH,
311 IGNORE_DIRECTORY_PATH,
312 REMOVE_PATH,
313 RECURSIVE_REMOVE_PATH,
df8dee85 314 EMPTY_DIRECTORY,
e73a03e0 315 ADJUST_MODE,
cde684a2 316 RELABEL_PATH,
b705ab6a
ZJS		 317 RECURSIVE_RELABEL_PATH,
318 SET_XATTR,
319 RECURSIVE_SET_XATTR,
320 SET_ACL,
34f64536
LP		 321 RECURSIVE_SET_ACL,
322 SET_ATTRIBUTE,
323 RECURSIVE_SET_ATTRIBUTE);
b8bb3e8f
LP		 324}
325
3f93da98
ZJS		 326static bool takes_ownership(ItemType t) {
327 return IN_SET(t,
328 CREATE_FILE,
329 TRUNCATE_FILE,
330 CREATE_DIRECTORY,
df8dee85 331 EMPTY_DIRECTORY,
3f93da98
ZJS		 332 TRUNCATE_DIRECTORY,
333 CREATE_SUBVOLUME,
5fb13eb5
LP		 334 CREATE_SUBVOLUME_INHERIT_QUOTA,
335 CREATE_SUBVOLUME_NEW_QUOTA,
3f93da98
ZJS		 336 CREATE_FIFO,
337 CREATE_SYMLINK,
338 CREATE_CHAR_DEVICE,
339 CREATE_BLOCK_DEVICE,
340 COPY_FILES,
3f93da98
ZJS		 341 WRITE_FILE,
342 IGNORE_PATH,
343 IGNORE_DIRECTORY_PATH,
344 REMOVE_PATH,
345 RECURSIVE_REMOVE_PATH);
346}
347
ef43a391 348static struct Item* find_glob(OrderedHashmap *h, const char *match) {
3f93da98 349 ItemArray *j;
b8bb3e8f
LP		 350 Iterator i;
351
ef43a391 352 ORDERED_HASHMAP_FOREACH(j, h, i) {
3f93da98
ZJS		 353 unsigned n;
354
355 for (n = 0; n < j->count; n++) {
356 Item *item = j->items + n;
357
358 if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
359 return item;
360 }
361 }
b8bb3e8f
LP		 362
363 return NULL;
364}
365
17b90525 366static void load_unix_sockets(void) {
7fd1b19b 367 _cleanup_fclose_ FILE *f = NULL;
f1ff734f 368 int r;
17b90525
LP		 369
370 if (unix_sockets)
371 return;
372
f1ff734f 373 /* We maintain a cache of the sockets we found in /proc/net/unix to speed things up a little. */
17b90525 374
548f6937
LP		 375 unix_sockets = set_new(&path_hash_ops);
376 if (!unix_sockets) {
377 log_oom();
17b90525 378 return;
548f6937 379 }
17b90525 380
fdcad0c2 381 f = fopen("/proc/net/unix", "re");
f1ff734f
LP		 382 if (!f) {
383 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno,
384 "Failed to open /proc/net/unix, ignoring: %m");
385 goto fail;
386 }
17b90525 387
fdcad0c2 388 /* Skip header */
f1ff734f
LP		 389 r = read_line(f, LONG_LINE_MAX, NULL);
390 if (r < 0) {
391 log_warning_errno(r, "Failed to skip /proc/net/unix header line: %m");
392 goto fail;
393 }
394 if (r == 0) {
395 log_warning("Premature end of file reading /proc/net/unix.");
17b90525 396 goto fail;
f1ff734f 397 }
17b90525
LP		 398
399 for (;;) {
f1ff734f 400 _cleanup_free_ char *line = NULL;
17b90525 401 char *p, *s;
17b90525 402
f1ff734f
LP		 403 r = read_line(f, LONG_LINE_MAX, &line);
404 if (r < 0) {
405 log_warning_errno(r, "Failed to read /proc/net/unix line, ignoring: %m");
406 goto fail;
407 }
408 if (r == 0) /* EOF */
17b90525
LP		 409 break;
410
fdcad0c2
LP		 411 p = strchr(line, ':');
412 if (!p)
413 continue;
414
415 if (strlen(p) < 37)
17b90525
LP		 416 continue;
417
fdcad0c2 418 p += 37;
17b90525 419 p += strspn(p, WHITESPACE);
fdcad0c2 420 p += strcspn(p, WHITESPACE); /* skip one more word */
17b90525
LP		 421 p += strspn(p, WHITESPACE);
422
423 if (*p != '/')
424 continue;
425
fdcad0c2 426 s = strdup(p);
f1ff734f
LP		 427 if (!s) {
428 log_oom();
17b90525 429 goto fail;
f1ff734f 430 }
17b90525 431
858d36c1 432 path_simplify(s, false);
4ff21d85 433
f1ff734f
LP		 434 r = set_consume(unix_sockets, s);
435 if (r < 0 && r != -EEXIST) {
436 log_warning_errno(r, "Failed to add AF_UNIX socket to set, ignoring: %m");
ef42202a 437 goto fail;
f1ff734f 438 }
17b90525
LP		 439 }
440
441 return;
442
443fail:
f1ff734f 444 unix_sockets = set_free_free(unix_sockets);
17b90525
LP		 445}
446
447static bool unix_socket_alive(const char *fn) {
448 assert(fn);
449
450 load_unix_sockets();
451
452 if (unix_sockets)
453 return !!set_get(unix_sockets, (char*) fn);
454
455 /* We don't know, so assume yes */
456 return true;
457}
458
99d680ac 459static int dir_is_mount_point(DIR *d, const char *subdir) {
cde684a2 460
99d680ac
KS		 461 int mount_id_parent, mount_id;
462 int r_p, r;
463
cbfb8679 464 r_p = name_to_handle_at_loop(dirfd(d), ".", NULL, &mount_id_parent, 0);
99d680ac
KS		 465 if (r_p < 0)
466 r_p = -errno;
467
cbfb8679 468 r = name_to_handle_at_loop(dirfd(d), subdir, NULL, &mount_id, 0);
99d680ac
KS		 469 if (r < 0)
470 r = -errno;
471
472 /* got no handle; make no assumptions, return error */
473 if (r_p < 0 && r < 0)
474 return r_p;
475
476 /* got both handles; if they differ, it is a mount point */
477 if (r_p >= 0 && r >= 0)
478 return mount_id_parent != mount_id;
479
480 /* got only one handle; assume different mount points if one
481 * of both queries was not supported by the filesystem */
4c701096 482 if (IN_SET(r_p, -ENOSYS, -EOPNOTSUPP) || IN_SET(r, -ENOSYS, -EOPNOTSUPP))
99d680ac
KS		 483 return true;
484
485 /* return error */
486 if (r_p < 0)
487 return r_p;
488 return r;
489}
490
df99a9ef
ZJS		 491static DIR* xopendirat_nomod(int dirfd, const char *path) {
492 DIR *dir;
493
494 dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME);
1532227a
LP		 495 if (dir)
496 return dir;
497
498 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
499 if (errno != EPERM)
500 return NULL;
501
502 dir = xopendirat(dirfd, path, O_NOFOLLOW);
503 if (!dir)
504 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
df99a9ef
ZJS		 505
506 return dir;
507}
508
509static DIR* opendir_nomod(const char *path) {
510 return xopendirat_nomod(AT_FDCWD, path);
511}
512
3b63d2d3 513static int dir_cleanup(
78a92a5a 514 Item *i,
3b63d2d3
LP		 515 const char *p,
516 DIR *d,
517 const struct stat *ds,
518 usec_t cutoff,
519 dev_t rootdev,
520 bool mountpoint,
24f3a374 521 int maxdepth,
265ffa1e
LP		 522 bool keep_this_level) {
523
3b63d2d3
LP		 524 struct dirent *dent;
525 struct timespec times[2];
526 bool deleted = false;
3b63d2d3
LP		 527 int r = 0;
528
8fb3f009 529 FOREACH_DIRENT_ALL(dent, d, break) {
3b63d2d3
LP		 530 struct stat s;
531 usec_t age;
7fd1b19b 532 _cleanup_free_ char *sub_path = NULL;
3b63d2d3 533
49bfc877 534 if (dot_or_dot_dot(dent->d_name))
3b63d2d3 535 continue;
5008d581 536
3b63d2d3 537 if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
ca2f4176
KS		 538 if (errno == ENOENT)
539 continue;
5008d581 540
ca2f4176 541 /* FUSE, NFS mounts, SELinux might return EACCES */
ecc1709c
LP		 542 r = log_full_errno(errno == EACCES ? LOG_DEBUG : LOG_ERR, errno,
543 "stat(%s/%s) failed: %m", p, dent->d_name);
3b63d2d3
LP		 544 continue;
545 }
546
547 /* Stay on the same filesystem */
582deb84
ZJS		 548 if (s.st_dev != rootdev) {
549 log_debug("Ignoring \"%s/%s\": different filesystem.", p, dent->d_name);
3b63d2d3 550 continue;
582deb84 551 }
3b63d2d3 552
99d680ac
KS		 553 /* Try to detect bind mounts of the same filesystem instance; they
554 * do not differ in device major/minors. This type of query is not
555 * supported on all kernels or filesystem types though. */
582deb84
ZJS		 556 if (S_ISDIR(s.st_mode) && dir_is_mount_point(d, dent->d_name) > 0) {
557 log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.",
558 p, dent->d_name);
99d680ac 559 continue;
582deb84 560 }
99d680ac 561
605405c6 562 sub_path = strjoin(p, "/", dent->d_name);
cde684a2 563 if (!sub_path) {
0d0f0c50 564 r = log_oom();
3b63d2d3
LP		 565 goto finish;
566 }
567
568 /* Is there an item configured for this path? */
ef43a391 569 if (ordered_hashmap_get(items, sub_path)) {
582deb84 570 log_debug("Ignoring \"%s\": a separate entry exists.", sub_path);
3b63d2d3 571 continue;
582deb84 572 }
3b63d2d3 573
582deb84
ZJS		 574 if (find_glob(globs, sub_path)) {
575 log_debug("Ignoring \"%s\": a separate glob exists.", sub_path);
b8bb3e8f 576 continue;
582deb84 577 }
b8bb3e8f 578
3b63d2d3
LP		 579 if (S_ISDIR(s.st_mode)) {
580
581 if (mountpoint &&
582 streq(dent->d_name, "lost+found") &&
582deb84
ZJS		 583 s.st_uid == 0) {
584 log_debug("Ignoring \"%s\".", sub_path);
3b63d2d3 585 continue;
582deb84 586 }
3b63d2d3
LP		 587
588 if (maxdepth <= 0)
582deb84 589 log_warning("Reached max depth on \"%s\".", sub_path);
3b63d2d3 590 else {
7fd1b19b 591 _cleanup_closedir_ DIR *sub_dir;
3b63d2d3
LP		 592 int q;
593
df99a9ef 594 sub_dir = xopendirat_nomod(dirfd(d), dent->d_name);
cde684a2 595 if (!sub_dir) {
582deb84
ZJS		 596 if (errno != ENOENT)
597 r = log_error_errno(errno, "opendir(%s) failed: %m", sub_path);
3b63d2d3
LP		 598
599 continue;
600 }
601
78a92a5a 602 q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);
3b63d2d3
LP		 603 if (q < 0)
604 r = q;
605 }
606
24f3a374
LP		 607 /* Note: if you are wondering why we don't
608 * support the sticky bit for excluding
609 * directories from cleaning like we do it for
610 * other file system objects: well, the sticky
611 * bit already has a meaning for directories,
612 * so we don't want to overload that. */
613
582deb84
ZJS		 614 if (keep_this_level) {
615 log_debug("Keeping \"%s\".", sub_path);
24f3a374 616 continue;
582deb84 617 }
24f3a374 618
3b63d2d3 619 /* Ignore ctime, we change it when deleting */
582deb84
ZJS		 620 age = timespec_load(&s.st_mtim);
621 if (age >= cutoff) {
622 char a[FORMAT_TIMESTAMP_MAX];
623 /* Follows spelling in stat(1). */
624 log_debug("Directory \"%s\": modify time %s is too new.",
625 sub_path,
626 format_timestamp_us(a, sizeof(a), age));
3b63d2d3 627 continue;
582deb84
ZJS		 628 }
629
630 age = timespec_load(&s.st_atim);
631 if (age >= cutoff) {
632 char a[FORMAT_TIMESTAMP_MAX];
633 log_debug("Directory \"%s\": access time %s is too new.",
634 sub_path,
635 format_timestamp_us(a, sizeof(a), age));
636 continue;
637 }
3b63d2d3 638
61253220
ZJS		 639 log_debug("Removing directory \"%s\".", sub_path);
640 if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0)
920ce828
LP		 641 if (!IN_SET(errno, ENOENT, ENOTEMPTY))
642 r = log_error_errno(errno, "rmdir(%s): %m", sub_path);
3b63d2d3
LP		 643
644 } else {
9c73736d
LP		 645 /* Skip files for which the sticky bit is
646 * set. These are semantics we define, and are
647 * unknown elsewhere. See XDG_RUNTIME_DIR
648 * specification for details. */
582deb84
ZJS		 649 if (s.st_mode & S_ISVTX) {
650 log_debug("Skipping \"%s\": sticky bit set.", sub_path);
9c73736d 651 continue;
582deb84 652 }
9c73736d 653
582deb84 654 if (mountpoint && S_ISREG(s.st_mode))
1542c01b
ZJS		 655 if (s.st_uid == 0 && STR_IN_SET(dent->d_name,
656 ".journal",
657 "aquota.user",
658 "aquota.group")) {
582deb84 659 log_debug("Skipping \"%s\".", sub_path);
3b63d2d3 660 continue;
582deb84 661 }
3b63d2d3 662
17b90525 663 /* Ignore sockets that are listed in /proc/net/unix */
582deb84
ZJS		 664 if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) {
665 log_debug("Skipping \"%s\": live socket.", sub_path);
17b90525 666 continue;
582deb84 667 }
17b90525 668
78ab08eb 669 /* Ignore device nodes */
582deb84
ZJS		 670 if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) {
671 log_debug("Skipping \"%s\": a device.", sub_path);
78ab08eb 672 continue;
582deb84 673 }
78ab08eb 674
24f3a374
LP		 675 /* Keep files on this level around if this is
676 * requested */
582deb84
ZJS		 677 if (keep_this_level) {
678 log_debug("Keeping \"%s\".", sub_path);
24f3a374 679 continue;
582deb84 680 }
24f3a374 681
582deb84
ZJS		 682 age = timespec_load(&s.st_mtim);
683 if (age >= cutoff) {
684 char a[FORMAT_TIMESTAMP_MAX];
685 /* Follows spelling in stat(1). */
686 log_debug("File \"%s\": modify time %s is too new.",
687 sub_path,
688 format_timestamp_us(a, sizeof(a), age));
3b63d2d3 689 continue;
582deb84 690 }
3b63d2d3 691
582deb84
ZJS		 692 age = timespec_load(&s.st_atim);
693 if (age >= cutoff) {
694 char a[FORMAT_TIMESTAMP_MAX];
695 log_debug("File \"%s\": access time %s is too new.",
696 sub_path,
697 format_timestamp_us(a, sizeof(a), age));
698 continue;
699 }
3b63d2d3 700
582deb84
ZJS		 701 age = timespec_load(&s.st_ctim);
702 if (age >= cutoff) {
703 char a[FORMAT_TIMESTAMP_MAX];
704 log_debug("File \"%s\": change time %s is too new.",
705 sub_path,
706 format_timestamp_us(a, sizeof(a), age));
707 continue;
3b63d2d3
LP		 708 }
709
582deb84
ZJS		 710 log_debug("unlink \"%s\"", sub_path);
711
712 if (unlinkat(dirfd(d), dent->d_name, 0) < 0)
713 if (errno != ENOENT)
714 r = log_error_errno(errno, "unlink(%s): %m", sub_path);
715
3b63d2d3
LP		 716 deleted = true;
717 }
718 }
719
720finish:
721 if (deleted) {
582deb84
ZJS		 722 usec_t age1, age2;
723 char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX];
724
3b63d2d3
LP		 725 /* Restore original directory timestamps */
726 times[0] = ds->st_atim;
727 times[1] = ds->st_mtim;
728
582deb84
ZJS		 729 age1 = timespec_load(&ds->st_atim);
730 age2 = timespec_load(&ds->st_mtim);
731 log_debug("Restoring access and modification time on \"%s\": %s, %s",
732 p,
733 format_timestamp_us(a, sizeof(a), age1),
734 format_timestamp_us(b, sizeof(b), age2));
3b63d2d3 735 if (futimens(dirfd(d), times) < 0)
56f64d95 736 log_error_errno(errno, "utimensat(%s): %m", p);
3b63d2d3
LP		 737 }
738
3b63d2d3
LP		 739 return r;
740}
741
5579f856
LP		 742static bool dangerous_hardlinks(void) {
743 _cleanup_free_ char *value = NULL;
744 static int cached = -1;
745 int r;
746
747 /* Check whether the fs.protected_hardlinks sysctl is on. If we can't determine it we assume its off, as that's
748 * what the upstream default is. */
749
750 if (cached >= 0)
751 return cached;
752
753 r = read_one_line_file("/proc/sys/fs/protected_hardlinks", &value);
754 if (r < 0) {
755 log_debug_errno(r, "Failed to read fs.protected_hardlinks sysctl: %m");
756 return true;
757 }
758
759 r = parse_boolean(value);
760 if (r < 0) {
761 log_debug_errno(r, "Failed to parse fs.protected_hardlinks sysctl: %m");
762 return true;
763 }
764
765 cached = r == 0;
766 return cached;
767}
768
774f79b5 769static bool hardlink_vulnerable(const struct stat *st) {
5579f856
LP		 770 assert(st);
771
772 return !S_ISDIR(st->st_mode) && st->st_nlink > 1 && dangerous_hardlinks();
773}
774
9d874aec 775static int fd_set_perms(Item *i, int fd, const char *path, const struct stat *st) {
b206ac8e 776 struct stat stbuf;
1924a97d 777
cde684a2 778 assert(i);
936f6bdb 779 assert(fd);
4dc7bfdf 780 assert(path);
48b8aaa8 781
936f6bdb
FB		 782 if (!i->mode_set && !i->uid_set && !i->gid_set)
783 goto shortcut;
1924a97d 784
b206ac8e
FB		 785 if (!st) {
786 if (fstat(fd, &stbuf) < 0)
787 return log_error_errno(errno, "fstat(%s) failed: %m", path);
788 st = &stbuf;
789 }
790
936f6bdb 791 if (hardlink_vulnerable(st)) {
5579f856
LP		 792 log_error("Refusing to set permissions on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.", path);
793 return -EPERM;
794 }
795
51207ca1 796 if (i->mode_set) {
936f6bdb 797 if (S_ISLNK(st->st_mode))
51207ca1
LP		 798 log_debug("Skipping mode fix for symlink %s.", path);
799 else {
48b8aaa8
LP		 800 mode_t m = i->mode;
801
802 if (i->mask_perms) {
936f6bdb 803 if (!(st->st_mode & 0111))
48b8aaa8 804 m &= ~0111;
936f6bdb 805 if (!(st->st_mode & 0222))
7d6884b6 806 m &= ~0222;
936f6bdb 807 if (!(st->st_mode & 0444))
48b8aaa8 808 m &= ~0444;
936f6bdb 809 if (!S_ISDIR(st->st_mode))
48b8aaa8
LP		 810 m &= ~07000; /* remove sticky/sgid/suid bit, unless directory */
811 }
abef3f91 812
936f6bdb
FB		 813 if (m == (st->st_mode & 07777))
814 log_debug("\"%s\" has correct mode %o already.", path, st->st_mode);
48b8aaa8 815 else {
51207ca1 816 log_debug("Changing \"%s\" to mode %o.", path, m);
4dfaa528
FB		 817 if (fchmod_opath(fd, m) < 0)
818 return log_error_errno(errno, "fchmod() of %s failed: %m", path);
48b8aaa8 819 }
062e01bb 820 }
51207ca1 821 }
062e01bb 822
936f6bdb
FB		 823 if ((i->uid_set && i->uid != st->st_uid) ||
824 (i->gid_set && i->gid != st->st_gid)) {
51207ca1
LP		 825 log_debug("Changing \"%s\" to owner "UID_FMT":"GID_FMT,
826 path,
827 i->uid_set ? i->uid : UID_INVALID,
828 i->gid_set ? i->gid : GID_INVALID);
829
936f6bdb
FB		 830 if (fchownat(fd,
831 "",
832 i->uid_set ? i->uid : UID_INVALID,
833 i->gid_set ? i->gid : GID_INVALID,
834 AT_EMPTY_PATH) < 0)
835 return log_error_errno(errno, "fchownat() of %s failed: %m", path);
582deb84 836 }
062e01bb 837
59793c8f 838shortcut:
08c84981 839 return label_fix(path, 0);
062e01bb
MS		 840}
841
5ec9d065
FB		 842static int path_open_parent_safe(const char *path) {
843 _cleanup_free_ char *dn = NULL;
844 int fd;
845
846 if (path_equal(path, "/") || !path_is_normalized(path)) {
847 log_error("Failed to open parent of '%s': invalid path.", path);
848 return -EINVAL;
849 }
850
851 dn = dirname_malloc(path);
852 if (!dn)
853 return log_oom();
854
855 fd = chase_symlinks(dn, NULL, CHASE_OPEN|CHASE_SAFE, NULL);
856 if (fd == -EPERM)
857 return log_error_errno(fd, "Unsafe symlinks encountered in %s, refusing.", path);
858 if (fd < 0)
859 return log_error_errno(fd, "Failed to validate path %s: %m", path);
860
861 return fd;
862}
863
addc3e30
FB		 864static int path_open_safe(const char *path) {
865 int fd;
866
867 /* path_open_safe() returns a file descriptor opened with O_PATH after
868 * verifying that the path doesn't contain unsafe transitions, except
869 * for its final component as the function does not follow symlink. */
870
871 assert(path);
872
873 if (!path_is_normalized(path)) {
874 log_error("Failed to open invalid path '%s'.", path);
875 return -EINVAL;
876 }
877
878 fd = chase_symlinks(path, NULL, CHASE_OPEN|CHASE_SAFE|CHASE_NOFOLLOW, NULL);
879 if (fd == -EPERM)
880 return log_error_errno(fd, "Unsafe symlinks encountered in %s, refusing.", path);
881 if (fd < 0)
882 return log_error_errno(fd, "Failed to validate path %s: %m", path);
883
884 return fd;
885}
886
936f6bdb
FB		 887static int path_set_perms(Item *i, const char *path) {
888 _cleanup_close_ int fd = -1;
936f6bdb
FB		 889
890 assert(i);
891 assert(path);
892
addc3e30 893 fd = path_open_safe(path);
54946021 894 if (fd < 0)
addc3e30 895 return fd;
d460ba18 896
9d874aec 897 return fd_set_perms(i, fd, path, NULL);
936f6bdb
FB		 898}
899
bd550f78 900static int parse_xattrs_from_arg(Item *i) {
ebf4e801
MW		 901 const char *p;
902 int r;
903
904 assert(i);
505ef0e3 905 assert(i->argument);
ebf4e801 906
ebf4e801
MW		 907 p = i->argument;
908
4034a06d 909 for (;;) {
4cef1923 910 _cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL;
4034a06d 911
12ba2c44 912 r = extract_first_word(&p, &xattr, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE);
4034a06d 913 if (r < 0)
bd550f78 914 log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p);
4034a06d
LP		 915 if (r <= 0)
916 break;
505ef0e3 917
4cef1923 918 r = split_pair(xattr, "=", &name, &value);
ebf4e801 919 if (r < 0) {
4034a06d 920 log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr);
ebf4e801
MW		 921 continue;
922 }
505ef0e3 923
4034a06d 924 if (isempty(name) || isempty(value)) {
bd550f78 925 log_warning("Malformed extended attribute found, ignoring: %s", xattr);
ebf4e801
MW		 926 continue;
927 }
505ef0e3 928
4034a06d 929 if (strv_push_pair(&i->xattrs, name, value) < 0)
ebf4e801 930 return log_oom();
505ef0e3 931
4034a06d 932 name = value = NULL;
ebf4e801
MW		 933 }
934
4034a06d 935 return 0;
ebf4e801
MW		 936}
937
9d874aec 938static int fd_set_xattrs(Item *i, int fd, const char *path, const struct stat *st) {
34d26777 939 char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
ebf4e801
MW		 940 char **name, **value;
941
942 assert(i);
936f6bdb 943 assert(fd);
4dc7bfdf 944 assert(path);
936f6bdb
FB		 945
946 xsprintf(procfs_path, "/proc/self/fd/%i", fd);
ebf4e801 947
ebf4e801 948 STRV_FOREACH_PAIR(name, value, i->xattrs) {
bd550f78 949 log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path);
936f6bdb 950 if (setxattr(procfs_path, *name, *value, strlen(*value), 0) < 0)
25f027c5
ZJS		 951 return log_error_errno(errno, "Setting extended attribute %s=%s on %s failed: %m",
952 *name, *value, path);
ebf4e801
MW		 953 }
954 return 0;
955}
956
936f6bdb
FB		 957static int path_set_xattrs(Item *i, const char *path) {
958 _cleanup_close_ int fd = -1;
959
960 assert(i);
961 assert(path);
962
addc3e30 963 fd = path_open_safe(path);
936f6bdb 964 if (fd < 0)
addc3e30 965 return fd;
936f6bdb 966
9d874aec 967 return fd_set_xattrs(i, fd, path, NULL);
936f6bdb
FB		 968}
969
bd550f78 970static int parse_acls_from_arg(Item *item) {
349cc4a5 971#if HAVE_ACL
f8eeeaf9 972 int r;
f8eeeaf9
ZJS		 973
974 assert(item);
975
50d9e46d
ZJS		 976 /* If force (= modify) is set, we will not modify the acl
977 * afterwards, so the mask can be added now if necessary. */
bd550f78 978
50d9e46d 979 r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force);
f8eeeaf9 980 if (r < 0)
4034a06d 981 log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument);
f8eeeaf9
ZJS		 982#else
983 log_warning_errno(ENOSYS, "ACLs are not supported. Ignoring");
984#endif
985
986 return 0;
987}
988
349cc4a5 989#if HAVE_ACL
48b8aaa8
LP		 990static int path_set_acl(const char *path, const char *pretty, acl_type_t type, acl_t acl, bool modify) {
991 _cleanup_(acl_free_charpp) char *t = NULL;
dd4105b0 992 _cleanup_(acl_freep) acl_t dup = NULL;
50d9e46d
ZJS		 993 int r;
994
d873e877
HPD		 995 /* Returns 0 for success, positive error if already warned,
996 * negative error otherwise. */
997
50d9e46d 998 if (modify) {
dd4105b0 999 r = acls_for_file(path, type, acl, &dup);
50d9e46d
ZJS		 1000 if (r < 0)
1001 return r;
50d9e46d 1002
dd4105b0
ZJS		 1003 r = calc_acl_mask_if_needed(&dup);
1004 if (r < 0)
1005 return r;
1006 } else {
1007 dup = acl_dup(acl);
1008 if (!dup)
1009 return -errno;
1010
1011 /* the mask was already added earlier if needed */
1012 }
1013
1014 r = add_base_acls_if_needed(&dup, path);
1015 if (r < 0)
1016 return r;
1017
582deb84 1018 t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);
48b8aaa8 1019 log_debug("Setting %s ACL %s on %s.",
582deb84 1020 type == ACL_TYPE_ACCESS ? "access" : "default",
48b8aaa8 1021 strna(t), pretty);
50d9e46d 1022
582deb84
ZJS		 1023 r = acl_set_file(path, type, dup);
1024 if (r < 0)
3ea40b78
LP		 1025 /* Return positive to indicate we already warned */
1026 return -log_error_errno(errno,
1027 "Setting %s ACL \"%s\" on %s failed: %m",
1028 type == ACL_TYPE_ACCESS ? "access" : "default",
48b8aaa8 1029 strna(t), pretty);
d873e877 1030
582deb84 1031 return 0;
50d9e46d 1032}
35888b67 1033#endif
50d9e46d 1034
9d874aec 1035static int fd_set_acls(Item *item, int fd, const char *path, const struct stat *st) {
d873e877 1036 int r = 0;
349cc4a5 1037#if HAVE_ACL
34d26777 1038 char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
b206ac8e 1039 struct stat stbuf;
48b8aaa8 1040
f8eeeaf9 1041 assert(item);
936f6bdb 1042 assert(fd);
4dc7bfdf 1043 assert(path);
48b8aaa8 1044
b206ac8e
FB		 1045 if (!st) {
1046 if (fstat(fd, &stbuf) < 0)
1047 return log_error_errno(errno, "fstat(%s) failed: %m", path);
1048 st = &stbuf;
1049 }
1050
936f6bdb 1051 if (hardlink_vulnerable(st)) {
5579f856
LP		 1052 log_error("Refusing to set ACLs on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.", path);
1053 return -EPERM;
1054 }
1055
936f6bdb 1056 if (S_ISLNK(st->st_mode)) {
48b8aaa8
LP		 1057 log_debug("Skipping ACL fix for symlink %s.", path);
1058 return 0;
1059 }
1060
936f6bdb 1061 xsprintf(procfs_path, "/proc/self/fd/%i", fd);
48b8aaa8 1062
d873e877 1063 if (item->acl_access)
936f6bdb 1064 r = path_set_acl(procfs_path, path, ACL_TYPE_ACCESS, item->acl_access, item->force);
f8eeeaf9 1065
2667385b
RM		 1066 /* set only default acls to folders */
1067 if (r == 0 && item->acl_default && S_ISDIR(st->st_mode))
936f6bdb 1068 r = path_set_acl(procfs_path, path, ACL_TYPE_DEFAULT, item->acl_default, item->force);
f8eeeaf9 1069
d873e877
HPD		 1070 if (r > 0)
1071 return -r; /* already warned */
936f6bdb 1072 if (r == -EOPNOTSUPP) {
d873e877
HPD		 1073 log_debug_errno(r, "ACLs not supported by file system at %s", path);
1074 return 0;
936f6bdb
FB		 1075 }
1076 if (r < 0)
1077 return log_error_errno(r, "ACL operation on \"%s\" failed: %m", path);
d873e877
HPD		 1078#endif
1079 return r;
f8eeeaf9
ZJS		 1080}
1081
936f6bdb
FB		 1082static int path_set_acls(Item *item, const char *path) {
1083 int r = 0;
545cdb90 1084#if HAVE_ACL
936f6bdb 1085 _cleanup_close_ int fd = -1;
936f6bdb
FB		 1086
1087 assert(item);
1088 assert(path);
1089
addc3e30 1090 fd = path_open_safe(path);
936f6bdb 1091 if (fd < 0)
addc3e30 1092 return fd;
936f6bdb 1093
9d874aec 1094 r = fd_set_acls(item, fd, path, NULL);
545cdb90
YW		 1095#endif
1096 return r;
1097}
936f6bdb 1098
88ec4dfa
LP		 1099#define ATTRIBUTES_ALL \
1100 (FS_NOATIME_FL | \
1101 FS_SYNC_FL | \
1102 FS_DIRSYNC_FL | \
1103 FS_APPEND_FL | \
1104 FS_COMPR_FL | \
1105 FS_NODUMP_FL | \
1106 FS_EXTENT_FL | \
1107 FS_IMMUTABLE_FL | \
1108 FS_JOURNAL_DATA_FL | \
1109 FS_SECRM_FL | \
1110 FS_UNRM_FL | \
1111 FS_NOTAIL_FL | \
1112 FS_TOPDIR_FL | \
1113 FS_NOCOW_FL)
1114
bd550f78 1115static int parse_attribute_from_arg(Item *item) {
88ec4dfa
LP		 1116
1117 static const struct {
1118 char character;
1119 unsigned value;
1120 } attributes[] = {
1121 { 'A', FS_NOATIME_FL }, /* do not update atime */
1122 { 'S', FS_SYNC_FL }, /* Synchronous updates */
1123 { 'D', FS_DIRSYNC_FL }, /* dirsync behaviour (directories only) */
1124 { 'a', FS_APPEND_FL }, /* writes to file may only append */
1125 { 'c', FS_COMPR_FL }, /* Compress file */
1126 { 'd', FS_NODUMP_FL }, /* do not dump file */
8c35b2ca 1127 { 'e', FS_EXTENT_FL }, /* Extents */
88ec4dfa
LP		 1128 { 'i', FS_IMMUTABLE_FL }, /* Immutable file */
1129 { 'j', FS_JOURNAL_DATA_FL }, /* Reserved for ext3 */
1130 { 's', FS_SECRM_FL }, /* Secure deletion */
1131 { 'u', FS_UNRM_FL }, /* Undelete */
1132 { 't', FS_NOTAIL_FL }, /* file tail should not be merged */
13e785f7 1133 { 'T', FS_TOPDIR_FL }, /* Top of directory hierarchies */
88ec4dfa 1134 { 'C', FS_NOCOW_FL }, /* Do not cow file */
22c3a6ca 1135 };
88ec4dfa 1136
22c3a6ca
GB		 1137 enum {
1138 MODE_ADD,
1139 MODE_DEL,
1140 MODE_SET
1141 } mode = MODE_ADD;
22c3a6ca 1142
88ec4dfa
LP		 1143 unsigned value = 0, mask = 0;
1144 const char *p;
22c3a6ca 1145
88ec4dfa
LP		 1146 assert(item);
1147
1148 p = item->argument;
1149 if (p) {
1150 if (*p == '+') {
1151 mode = MODE_ADD;
1152 p++;
1153 } else if (*p == '-') {
1154 mode = MODE_DEL;
1155 p++;
1156 } else if (*p == '=') {
1157 mode = MODE_SET;
1158 p++;
1159 }
22c3a6ca
GB		 1160 }
1161
88ec4dfa
LP		 1162 if (isempty(p) && mode != MODE_SET) {
1163 log_error("Setting file attribute on '%s' needs an attribute specification.", item->path);
22c3a6ca
GB		 1164 return -EINVAL;
1165 }
88ec4dfa
LP		 1166
1167 for (; p && *p ; p++) {
1168 unsigned i, v;
1169
1170 for (i = 0; i < ELEMENTSOF(attributes); i++)
1171 if (*p == attributes[i].character)
1172 break;
1173
1174 if (i >= ELEMENTSOF(attributes)) {
1175 log_error("Unknown file attribute '%c' on '%s'.", *p, item->path);
22c3a6ca
GB		 1176 return -EINVAL;
1177 }
88ec4dfa
LP		 1178
1179 v = attributes[i].value;
1180
3742095b 1181 SET_FLAG(value, v, IN_SET(mode, MODE_ADD, MODE_SET));
88ec4dfa
LP		 1182
1183 mask |= v;
22c3a6ca
GB		 1184 }
1185
1186 if (mode == MODE_SET)
88ec4dfa 1187 mask |= ATTRIBUTES_ALL;
22c3a6ca 1188
88ec4dfa 1189 assert(mask != 0);
22c3a6ca 1190
88ec4dfa
LP		 1191 item->attribute_mask = mask;
1192 item->attribute_value = value;
1193 item->attribute_set = true;
22c3a6ca
GB		 1194
1195 return 0;
22c3a6ca
GB		 1196}
1197
9d874aec 1198static int fd_set_attribute(Item *item, int fd, const char *path, const struct stat *st) {
936f6bdb 1199 _cleanup_close_ int procfs_fd = -1;
b206ac8e 1200 struct stat stbuf;
88ec4dfa
LP		 1201 unsigned f;
1202 int r;
22c3a6ca 1203
4dc7bfdf
FB		 1204 assert(item);
1205 assert(fd);
1206 assert(path);
1207
88ec4dfa 1208 if (!item->attribute_set || item->attribute_mask == 0)
22c3a6ca 1209 return 0;
22c3a6ca 1210
b206ac8e
FB		 1211 if (!st) {
1212 if (fstat(fd, &stbuf) < 0)
1213 return log_error_errno(errno, "fstat(%s) failed: %m", path);
1214 st = &stbuf;
1215 }
1216
88ec4dfa
LP		 1217 /* Issuing the file attribute ioctls on device nodes is not
1218 * safe, as that will be delivered to the drivers, not the
1219 * file system containing the device node. */
936f6bdb 1220 if (!S_ISREG(st->st_mode) && !S_ISDIR(st->st_mode)) {
88ec4dfa
LP		 1221 log_error("Setting file flags is only supported on regular files and directories, cannot set on '%s'.", path);
1222 return -EINVAL;
1223 }
1224
1225 f = item->attribute_value & item->attribute_mask;
1226
1227 /* Mask away directory-specific flags */
936f6bdb 1228 if (!S_ISDIR(st->st_mode))
22c3a6ca 1229 f &= ~FS_DIRSYNC_FL;
88ec4dfa 1230
f2324783 1231 procfs_fd = fd_reopen(fd, O_RDONLY|O_CLOEXEC|O_NOATIME);
936f6bdb 1232 if (procfs_fd < 0)
c3e03778 1233 return log_error_errno(procfs_fd, "Failed to re-open '%s': %m", path);
936f6bdb 1234
db9a4254 1235 r = chattr_fd(procfs_fd, f, item->attribute_mask, NULL);
22c3a6ca 1236 if (r < 0)
4c701096 1237 log_full_errno(IN_SET(r, -ENOTTY, -EOPNOTSUPP) ? LOG_DEBUG : LOG_WARNING,
ad75a97f 1238 r,
15b45fac 1239 "Cannot set file attribute for '%s', value=0x%08x, mask=0x%08x, ignoring: %m",
ad75a97f 1240 path, item->attribute_value, item->attribute_mask);
22c3a6ca
GB		 1241
1242 return 0;
1243}
1244
936f6bdb
FB		 1245static int path_set_attribute(Item *item, const char *path) {
1246 _cleanup_close_ int fd = -1;
936f6bdb
FB		 1247
1248 if (!item->attribute_set || item->attribute_mask == 0)
1249 return 0;
1250
addc3e30 1251 fd = path_open_safe(path);
936f6bdb 1252 if (fd < 0)
addc3e30 1253 return fd;
936f6bdb 1254
9d874aec 1255 return fd_set_attribute(item, fd, path, NULL);
936f6bdb
FB		 1256}
1257
d4e9eb91 1258static int write_one_file(Item *i, const char *path) {
551470ec
FB		 1259 _cleanup_close_ int fd = -1, dir_fd = -1;
1260 char *bn;
31c84ff1
FB		 1261 int r;
1262
1263 assert(i);
1264 assert(path);
1265 assert(i->argument);
1266 assert(i->type == WRITE_FILE);
1267
551470ec
FB		 1268 /* Validate the path and keep the fd on the directory for opening the
1269 * file so we're sure that it can't be changed behind our back. */
1270 dir_fd = path_open_parent_safe(path);
1271 if (dir_fd < 0)
1272 return dir_fd;
1273
1274 bn = basename(path);
1275
31c84ff1 1276 /* Follows symlinks */
551470ec 1277 fd = openat(dir_fd, bn, O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
31c84ff1
FB		 1278 if (fd < 0) {
1279 if (errno == ENOENT) {
1280 log_debug_errno(errno, "Not writing missing file \"%s\": %m", path);
1281 return 0;
1282 }
1283 return log_error_errno(errno, "Failed to open file \"%s\": %m", path);
1284 }
1285
1286 /* 'w' is allowed to write into any kind of files. */
1287 log_debug("Writing to \"%s\".", path);
1288
1289 r = loop_write(fd, i->argument, strlen(i->argument), false);
1290 if (r < 0)
1291 return log_error_errno(r, "Failed to write file \"%s\": %m", path);
1292
9d874aec 1293 return fd_set_perms(i, fd, path, NULL);
31c84ff1
FB		 1294}
1295
1296static int create_file(Item *i, const char *path) {
5ec9d065
FB		 1297 _cleanup_close_ int fd = -1, dir_fd = -1;
1298 struct stat stbuf, *st = NULL;
1299 int r = 0;
1300 char *bn;
d4e9eb91 1301
874f1947
LP		 1302 assert(i);
1303 assert(path);
5ec9d065
FB		 1304 assert(i->type == CREATE_FILE);
1305
1306 /* 'f' operates on regular files exclusively. */
1307
1308 /* Validate the path and keep the fd on the directory for opening the
1309 * file so we're sure that it can't be changed behind our back. */
1310 dir_fd = path_open_parent_safe(path);
1311 if (dir_fd < 0)
1312 return dir_fd;
874f1947 1313
5ec9d065 1314 bn = basename(path);
d4e9eb91 1315
43ad6e31 1316 RUN_WITH_UMASK(0000) {
ecabcf8b 1317 mac_selinux_create_file_prepare(path, S_IFREG);
5ec9d065 1318 fd = openat(dir_fd, bn, O_CREAT|O_EXCL|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
ecabcf8b 1319 mac_selinux_create_file_clear();
5c0d398d 1320 }
d4e9eb91
DR		 1321
1322 if (fd < 0) {
5ec9d065
FB		 1323 /* Even on a read-only filesystem, open(2) returns EEXIST if the
1324 * file already exists. It returns EROFS only if it needs to
1325 * create the file. */
1326 if (errno != EEXIST)
1327 return log_error_errno(errno, "Failed to create file %s: %m", path);
1328
1329 /* Re-open the file. At that point it must exist since open(2)
1330 * failed with EEXIST. We still need to check if the perms/mode
1331 * need to be changed. For read-only filesystems, we let
1332 * fd_set_perms() report the error if the perms need to be
1333 * modified. */
1334 fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
1335 if (fd < 0)
1336 return log_error_errno(errno, "Failed to re-open file %s: %m", path);
1337
1338 if (fstat(fd, &stbuf) < 0)
1339 return log_error_errno(errno, "stat(%s) failed: %m", path);
1340
1341 if (!S_ISREG(stbuf.st_mode)) {
1342 log_error("%s exists and is not a regular file.", path);
1343 return -EEXIST;
49e87292 1344 }
d4e9eb91 1345
5ec9d065
FB		 1346 st = &stbuf;
1347 } else {
1348
1349 log_debug("\"%s\" has been created.", path);
1350
1351 if (i->argument) {
1352 log_debug("Writing to \"%s\".", path);
f44b28fd 1353
5ec9d065
FB		 1354 r = loop_write(fd, i->argument, strlen(i->argument), false);
1355 if (r < 0)
1356 return log_error_errno(r, "Failed to write file \"%s\": %m", path);
1357 }
d4e9eb91
DR		 1358 }
1359
9d874aec 1360 return fd_set_perms(i, fd, path, st);
5ec9d065 1361}
d4e9eb91 1362
5ec9d065 1363static int truncate_file(Item *i, const char *path) {
14ab804e 1364 _cleanup_close_ int fd = -1, dir_fd = -1;
5ec9d065
FB		 1365 struct stat stbuf, *st = NULL;
1366 bool erofs = false;
1367 int r = 0;
14ab804e 1368 char *bn;
5ec9d065
FB		 1369
1370 assert(i);
1371 assert(path);
1372 assert(i->type == TRUNCATE_FILE);
d4e9eb91 1373
5ec9d065
FB		 1374 /* We want to operate on regular file exclusively especially since
1375 * O_TRUNC is unspecified if the file is neither a regular file nor a
1376 * fifo nor a terminal device. Therefore we first open the file and make
1377 * sure it's a regular one before truncating it. */
3612fbc1 1378
14ab804e
FB		 1379 /* Validate the path and keep the fd on the directory for opening the
1380 * file so we're sure that it can't be changed behind our back. */
1381 dir_fd = path_open_parent_safe(path);
1382 if (dir_fd < 0)
1383 return dir_fd;
1384
1385 bn = basename(path);
1386
5ec9d065
FB		 1387 RUN_WITH_UMASK(0000) {
1388 mac_selinux_create_file_prepare(path, S_IFREG);
14ab804e 1389 fd = openat(dir_fd, bn, O_CREAT|O_NOFOLLOW|O_NONBLOCK|O_CLOEXEC|O_WRONLY|O_NOCTTY, i->mode);
5ec9d065
FB		 1390 mac_selinux_create_file_clear();
1391 }
1392
1393 if (fd < 0) {
1394 if (errno != EROFS)
1395 return log_error_errno(errno, "Failed to open/create file %s: %m", path);
1396
1397 /* On a read-only filesystem, we don't want to fail if the
1398 * target is already empty and the perms are set. So we still
1399 * proceed with the sanity checks and let the remaining
1400 * operations fail with EROFS if they try to modify the target
1401 * file. */
1402
14ab804e 1403 fd = openat(dir_fd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH, i->mode);
5ec9d065
FB		 1404 if (fd < 0) {
1405 if (errno == ENOENT) {
1406 log_error("Cannot create file %s on a read-only file system.", path);
1407 return -EROFS;
1408 }
1409
1410 return log_error_errno(errno, "Failed to re-open file %s: %m", path);
1411 }
1412
1413 erofs = true;
1414 }
1415
1416 if (fstat(fd, &stbuf) < 0)
4a62c710 1417 return log_error_errno(errno, "stat(%s) failed: %m", path);
d4e9eb91 1418
5ec9d065
FB		 1419 if (!S_ISREG(stbuf.st_mode)) {
1420 log_error("%s exists and is not a regular file.", path);
d4e9eb91
DR		 1421 return -EEXIST;
1422 }
1423
5ec9d065
FB		 1424 if (stbuf.st_size > 0) {
1425 if (ftruncate(fd, 0) < 0) {
1426 r = erofs ? -EROFS : -errno;
1427 return log_error_errno(r, "Failed to truncate file %s: %m", path);
1428 }
1429 } else
1430 st = &stbuf;
d4e9eb91 1431
5ec9d065
FB		 1432 log_debug("\"%s\" has been created.", path);
1433
1434 if (i->argument) {
1435 log_debug("Writing to \"%s\".", path);
1436
1437 r = loop_write(fd, i->argument, strlen(i->argument), false);
1438 if (r < 0) {
1439 r = erofs ? -EROFS : r;
1440 return log_error_errno(r, "Failed to write file %s: %m", path);
1441 }
1442 }
1443
9d874aec 1444 return fd_set_perms(i, fd, path, st);
d4e9eb91
DR		 1445}
1446
b1f7b17f 1447static int copy_files(Item *i) {
16ba55ad
FB		 1448 _cleanup_close_ int dfd = -1, fd = -1;
1449 char *bn;
b1f7b17f
FB		 1450 int r;
1451
1452 log_debug("Copying tree \"%s\" to \"%s\".", i->argument, i->path);
1453
16ba55ad 1454 bn = basename(i->path);
b1f7b17f 1455
16ba55ad
FB		 1456 /* Validate the path and use the returned directory fd for copying the
1457 * target so we're sure that the path can't be changed behind our
1458 * back. */
1459 dfd = path_open_parent_safe(i->path);
1460 if (dfd < 0)
1461 return dfd;
b1f7b17f 1462
16ba55ad
FB		 1463 r = copy_tree_at(AT_FDCWD, i->argument,
1464 dfd, bn,
1465 i->uid_set ? i->uid : UID_INVALID,
1466 i->gid_set ? i->gid : GID_INVALID,
1467 COPY_REFLINK);
b1f7b17f
FB		 1468 if (r < 0) {
1469 struct stat a, b;
1470
16ba55ad
FB		 1471 /* If the target already exists on read-only filesystems, trying
1472 * to create the target will not fail with EEXIST but with
1473 * EROFS. */
1474 if (r == -EROFS && faccessat(dfd, bn, F_OK, AT_SYMLINK_NOFOLLOW) == 0)
1475 r = -EEXIST;
1476
b1f7b17f
FB		 1477 if (r != -EEXIST)
1478 return log_error_errno(r, "Failed to copy files to %s: %m", i->path);
1479
1480 if (stat(i->argument, &a) < 0)
1481 return log_error_errno(errno, "stat(%s) failed: %m", i->argument);
1482
16ba55ad 1483 if (fstatat(dfd, bn, &b, AT_SYMLINK_NOFOLLOW) < 0)
b1f7b17f
FB		 1484 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1485
1486 if ((a.st_mode ^ b.st_mode) & S_IFMT) {
1487 log_debug("Can't copy to %s, file exists already and is of different type", i->path);
1488 return 0;
1489 }
1490 }
1491
16ba55ad
FB		 1492 fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1493 if (fd < 0)
1494 return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
1495
9d874aec 1496 return fd_set_perms(i, fd, i->path, NULL);
b1f7b17f
FB		 1497}
1498
074bd73f
FB		 1499typedef enum {
1500 CREATION_NORMAL,
1501 CREATION_EXISTING,
1502 CREATION_FORCE,
1503 _CREATION_MODE_MAX,
1504 _CREATION_MODE_INVALID = -1
1505} CreationMode;
1506
1507static const char *creation_mode_verb_table[_CREATION_MODE_MAX] = {
1508 [CREATION_NORMAL] = "Created",
1509 [CREATION_EXISTING] = "Found existing",
1510 [CREATION_FORCE] = "Created replacement",
1511};
1512
1513DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(creation_mode_verb, CreationMode);
1514
f17a8d61 1515static int create_directory_or_subvolume(const char *path, mode_t mode, bool subvol, CreationMode *creation) {
4c39d899 1516 _cleanup_close_ int pfd = -1;
f17a8d61 1517 CreationMode c;
4c39d899 1518 int r;
4ad36844 1519
4c39d899 1520 assert(path);
4ad36844 1521
f17a8d61
FB		 1522 if (!creation)
1523 creation = &c;
1524
4c39d899
FB		 1525 pfd = path_open_parent_safe(path);
1526 if (pfd < 0)
1527 return pfd;
4ad36844 1528
4c39d899 1529 if (subvol) {
4ad36844
FB		 1530 if (btrfs_is_subvol(empty_to_root(arg_root)) <= 0)
1531
1532 /* Don't create a subvolume unless the root directory is
1533 * one, too. We do this under the assumption that if the
1534 * root directory is just a plain directory (i.e. very
1535 * light-weight), we shouldn't try to split it up into
1536 * subvolumes (i.e. more heavy-weight). Thus, chroot()
1537 * environments and suchlike will get a full brtfs
1538 * subvolume set up below their tree only if they
1539 * specifically set up a btrfs subvolume for the root
1540 * dir too. */
1541
4c39d899 1542 subvol = false;
4ad36844 1543 else {
4c39d899
FB		 1544 RUN_WITH_UMASK((~mode) & 0777)
1545 r = btrfs_subvol_make_fd(pfd, basename(path));
4ad36844
FB		 1546 }
1547 } else
1548 r = 0;
1549
4c39d899 1550 if (!subvol || r == -ENOTTY)
4ad36844 1551 RUN_WITH_UMASK(0000)
4c39d899 1552 r = mkdirat_label(pfd, basename(path), mode);
4ad36844
FB		 1553
1554 if (r < 0) {
1555 int k;
1556
1557 if (!IN_SET(r, -EEXIST, -EROFS))
4c39d899 1558 return log_error_errno(r, "Failed to create directory or subvolume \"%s\": %m", path);
4ad36844 1559
4c39d899 1560 k = is_dir_fd(pfd);
4ad36844 1561 if (k == -ENOENT && r == -EROFS)
4c39d899 1562 return log_error_errno(r, "%s does not exist and cannot be created as the file system is read-only.", path);
4ad36844 1563 if (k < 0)
4c39d899 1564 return log_error_errno(k, "Failed to check if %s exists: %m", path);
4ad36844 1565 if (!k) {
4c39d899
FB		 1566 log_warning("\"%s\" already exists and is not a directory.", path);
1567 return -EEXIST;
4ad36844
FB		 1568 }
1569
f17a8d61 1570 *creation = CREATION_EXISTING;
4ad36844 1571 } else
f17a8d61 1572 *creation = CREATION_NORMAL;
4ad36844 1573
f17a8d61 1574 log_debug("%s directory \"%s\".", creation_mode_verb_to_string(*creation), path);
4c39d899
FB		 1575
1576 r = openat(pfd, basename(path), O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
1577 if (r < 0)
09f12798
LP		 1578 return log_error_errno(errno, "Failed to open directory '%s': %m", basename(path));
1579
4c39d899
FB		 1580 return r;
1581}
1582
1583static int create_directory(Item *i, const char *path) {
1584 _cleanup_close_ int fd = -1;
1585
1586 assert(i);
1587 assert(IN_SET(i->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY));
1588
f17a8d61 1589 fd = create_directory_or_subvolume(path, i->mode, false, NULL);
4c39d899
FB		 1590 if (fd == -EEXIST)
1591 return 0;
1592 if (fd < 0)
1593 return fd;
1594
9d874aec 1595 return fd_set_perms(i, fd, path, NULL);
4c39d899
FB		 1596}
1597
1598static int create_subvolume(Item *i, const char *path) {
1599 _cleanup_close_ int fd = -1;
f17a8d61 1600 CreationMode creation;
4c39d899
FB		 1601 int r, q = 0;
1602
1603 assert(i);
1604 assert(IN_SET(i->type, CREATE_SUBVOLUME, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA));
1605
f17a8d61 1606 fd = create_directory_or_subvolume(path, i->mode, true, &creation);
4c39d899
FB		 1607 if (fd == -EEXIST)
1608 return 0;
1609 if (fd < 0)
1610 return fd;
4ad36844 1611
f17a8d61
FB		 1612 if (creation == CREATION_NORMAL &&
1613 IN_SET(i->type, CREATE_SUBVOLUME_NEW_QUOTA, CREATE_SUBVOLUME_INHERIT_QUOTA)) {
4c39d899 1614 r = btrfs_subvol_auto_qgroup_fd(fd, 0, i->type == CREATE_SUBVOLUME_NEW_QUOTA);
4ad36844
FB		 1615 if (r == -ENOTTY)
1616 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (unsupported fs or dir not a subvolume): %m", i->path);
1617 else if (r == -EROFS)
1618 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (fs is read-only).", i->path);
1619 else if (r == -ENOPROTOOPT)
1620 log_debug_errno(r, "Couldn't adjust quota for subvolume \"%s\" (quota support is disabled).", i->path);
1621 else if (r < 0)
1622 q = log_error_errno(r, "Failed to adjust quota for subvolume \"%s\": %m", i->path);
1623 else if (r > 0)
1624 log_debug("Adjusted quota for subvolume \"%s\".", i->path);
1625 else if (r == 0)
1626 log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
1627 }
1628
9d874aec
LP		 1629 r = fd_set_perms(i, fd, path, NULL);
1630 if (q < 0) /* prefer the quota change error from above */
4ad36844
FB		 1631 return q;
1632
1633 return r;
1634}
1635
54946021
FB		 1636static int empty_directory(Item *i, const char *path) {
1637 int r;
1638
1639 assert(i);
1640 assert(i->type == EMPTY_DIRECTORY);
1641
1642 r = is_dir(path, false);
1643 if (r == -ENOENT) {
1644 /* Option "e" operates only on existing objects. Do not
1645 * print errors about non-existent files or directories */
1646 log_debug("Skipping missing directory: %s", path);
1647 return 0;
1648 }
1649 if (r < 0)
1650 return log_error_errno(r, "is_dir() failed on path %s: %m", path);
1651 if (r == 0) {
1652 log_error("'%s' already exists and is not a directory.", path);
1653 return -EEXIST;
1654 }
1655
1656 return path_set_perms(i, path);
1657}
1658
074bd73f 1659static int create_device(Item *i, mode_t file_type) {
c7700a77 1660 _cleanup_close_ int dfd = -1, fd = -1;
074bd73f 1661 CreationMode creation;
c7700a77 1662 char *bn;
074bd73f
FB		 1663 int r;
1664
1665 assert(i);
1666 assert(IN_SET(file_type, S_IFBLK, S_IFCHR));
1667
c7700a77
FB		 1668 bn = basename(i->path);
1669
1670 /* Validate the path and use the returned directory fd for copying the
1671 * target so we're sure that the path can't be changed behind our
1672 * back. */
1673 dfd = path_open_parent_safe(i->path);
1674 if (dfd < 0)
1675 return dfd;
1676
074bd73f
FB		 1677 RUN_WITH_UMASK(0000) {
1678 mac_selinux_create_file_prepare(i->path, file_type);
c7700a77 1679 r = mknodat(dfd, bn, i->mode | file_type, i->major_minor);
074bd73f
FB		 1680 mac_selinux_create_file_clear();
1681 }
1682
1683 if (r < 0) {
c7700a77
FB		 1684 struct stat st;
1685
074bd73f
FB		 1686 if (errno == EPERM) {
1687 log_debug("We lack permissions, possibly because of cgroup configuration; "
1688 "skipping creation of device node %s.", i->path);
1689 return 0;
1690 }
1691
1692 if (errno != EEXIST)
1693 return log_error_errno(errno, "Failed to create device node %s: %m", i->path);
1694
c7700a77 1695 if (fstatat(dfd, bn, &st, 0) < 0)
074bd73f
FB		 1696 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
1697
1698 if ((st.st_mode & S_IFMT) != file_type) {
1699
1700 if (i->force) {
1701
1702 RUN_WITH_UMASK(0000) {
1703 mac_selinux_create_file_prepare(i->path, file_type);
c7700a77 1704 /* FIXME: need to introduce mknodat_atomic() */
074bd73f
FB		 1705 r = mknod_atomic(i->path, i->mode | file_type, i->major_minor);
1706 mac_selinux_create_file_clear();
1707 }
1708
1709 if (r < 0)
1710 return log_error_errno(r, "Failed to create device node \"%s\": %m", i->path);
1711 creation = CREATION_FORCE;
1712 } else {
1713 log_debug("%s is not a device node.", i->path);
1714 return 0;
1715 }
1716 } else
1717 creation = CREATION_EXISTING;
1718 } else
1719 creation = CREATION_NORMAL;
1720
1721 log_debug("%s %s device node \"%s\" %u:%u.",
1722 creation_mode_verb_to_string(creation),
1723 i->type == CREATE_BLOCK_DEVICE ? "block" : "char",
1724 i->path, major(i->mode), minor(i->mode));
1725
c7700a77
FB		 1726 fd = openat(dfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1727 if (fd < 0)
1728 return log_error_errno(errno, "Failed to openat(%s): %m", i->path);
1729
9d874aec 1730 return fd_set_perms(i, fd, i->path, NULL);
074bd73f
FB		 1731}
1732
a2fc2f8d 1733static int create_fifo(Item *i, const char *path) {
7ea5a87f 1734 _cleanup_close_ int pfd = -1, fd = -1;
a2fc2f8d
FB		 1735 CreationMode creation;
1736 struct stat st;
7ea5a87f 1737 char *bn;
a2fc2f8d
FB		 1738 int r;
1739
7ea5a87f
FB		 1740 pfd = path_open_parent_safe(path);
1741 if (pfd < 0)
1742 return pfd;
1743
1744 bn = basename(path);
1745
a2fc2f8d
FB		 1746 RUN_WITH_UMASK(0000) {
1747 mac_selinux_create_file_prepare(path, S_IFIFO);
7ea5a87f 1748 r = mkfifoat(pfd, bn, i->mode);
a2fc2f8d
FB		 1749 mac_selinux_create_file_clear();
1750 }
1751
1752 if (r < 0) {
1753 if (errno != EEXIST)
1754 return log_error_errno(errno, "Failed to create fifo %s: %m", path);
1755
7ea5a87f 1756 if (fstatat(pfd, bn, &st, AT_SYMLINK_NOFOLLOW) < 0)
a2fc2f8d
FB		 1757 return log_error_errno(errno, "stat(%s) failed: %m", path);
1758
1759 if (!S_ISFIFO(st.st_mode)) {
1760
1761 if (i->force) {
1762 RUN_WITH_UMASK(0000) {
1763 mac_selinux_create_file_prepare(path, S_IFIFO);
7ea5a87f 1764 r = mkfifoat_atomic(pfd, bn, i->mode);
a2fc2f8d
FB		 1765 mac_selinux_create_file_clear();
1766 }
1767
1768 if (r < 0)
1769 return log_error_errno(r, "Failed to create fifo %s: %m", path);
1770 creation = CREATION_FORCE;
1771 } else {
1772 log_warning("\"%s\" already exists and is not a fifo.", path);
1773 return 0;
1774 }
1775 } else
1776 creation = CREATION_EXISTING;
1777 } else
1778 creation = CREATION_NORMAL;
7ea5a87f 1779
a2fc2f8d
FB		 1780 log_debug("%s fifo \"%s\".", creation_mode_verb_to_string(creation), path);
1781
7ea5a87f
FB		 1782 fd = openat(pfd, bn, O_NOFOLLOW|O_CLOEXEC|O_PATH);
1783 if (fd < 0)
a5df05ff 1784 return log_error_errno(errno, "Failed to openat(%s): %m", path);
7ea5a87f 1785
9d874aec 1786 return fd_set_perms(i, fd, i->path, NULL);
a2fc2f8d
FB		 1787}
1788
9d874aec
LP		 1789typedef int (*action_t)(Item *i, const char *path);
1790typedef int (*fdaction_t)(Item *i, int fd, const char *path, const struct stat *st);
081043cf 1791
9d874aec 1792static int item_do(Item *i, int fd, const char *path, fdaction_t action) {
14f3480a 1793 struct stat st;
936f6bdb 1794 int r = 0, q;
e73a03e0
LP		 1795
1796 assert(i);
4dc7bfdf 1797 assert(path);
936f6bdb 1798 assert(fd >= 0);
14f3480a
FB		 1799
1800 if (fstat(fd, &st) < 0) {
09f12798 1801 r = log_error_errno(errno, "fstat() on file failed: %m");
14f3480a
FB		 1802 goto finish;
1803 }
a8d88783
MS		 1804
1805 /* This returns the first error we run into, but nevertheless
1806 * tries to go on */
9d874aec 1807 r = action(i, fd, path, &st);
a8d88783 1808
14f3480a 1809 if (S_ISDIR(st.st_mode)) {
22dd8d35 1810 char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
936f6bdb
FB		 1811 _cleanup_closedir_ DIR *d = NULL;
1812 struct dirent *de;
a8d88783 1813
936f6bdb
FB		 1814 /* The passed 'fd' was opened with O_PATH. We need to convert
1815 * it into a 'regular' fd before reading the directory content. */
1816 xsprintf(procfs_path, "/proc/self/fd/%i", fd);
a8d88783 1817
936f6bdb
FB		 1818 d = opendir(procfs_path);
1819 if (!d) {
09f12798
LP		 1820 log_error_errno(errno, "Failed to opendir() '%s': %m", procfs_path);
1821 if (r == 0)
1822 r = -errno;
936f6bdb
FB		 1823 goto finish;
1824 }
a8d88783 1825
936f6bdb 1826 FOREACH_DIRENT_ALL(de, d, q = -errno; goto finish) {
936f6bdb 1827 int de_fd;
a8d88783 1828
936f6bdb
FB		 1829 if (dot_or_dot_dot(de->d_name))
1830 continue;
1831
1832 de_fd = openat(fd, de->d_name, O_NOFOLLOW|O_CLOEXEC|O_PATH);
9d874aec
LP		 1833 if (de_fd < 0)
1834 q = log_error_errno(errno, "Failed to open() file '%s': %m", de->d_name);
4dc7bfdf
FB		 1835 else {
1836 _cleanup_free_ char *de_path = NULL;
1837
1838 de_path = path_join(NULL, path, de->d_name);
1839 if (!de_path)
1840 q = log_oom();
1841 else
1842 /* Pass ownership of dirent fd over */
1843 q = item_do(i, de_fd, de_path, action);
1844 }
a8d88783 1845
e73a03e0
LP		 1846 if (q < 0 && r == 0)
1847 r = q;
a8d88783 1848 }
a8d88783 1849 }
936f6bdb
FB		 1850finish:
1851 safe_close(fd);
e73a03e0 1852 return r;
a8d88783
MS		 1853}
1854
936f6bdb 1855static int glob_item(Item *i, action_t action) {
df99a9ef 1856 _cleanup_globfree_ glob_t g = {
ebf31a1f 1857 .gl_opendir = (void *(*)(const char *)) opendir_nomod,
df99a9ef 1858 };
e73a03e0 1859 int r = 0, k;
99e68c0b
MS		 1860 char **fn;
1861
84e72b5e
ZJS		 1862 k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
1863 if (k < 0 && k != -ENOENT)
1864 return log_error_errno(k, "glob(%s) failed: %m", i->path);
99e68c0b 1865
c84a9488
ZJS		 1866 STRV_FOREACH(fn, g.gl_pathv) {
1867 k = action(i, *fn);
e73a03e0 1868 if (k < 0 && r == 0)
99e68c0b 1869 r = k;
936f6bdb
FB		 1870 }
1871
1872 return r;
1873}
081043cf 1874
936f6bdb
FB		 1875static int glob_item_recursively(Item *i, fdaction_t action) {
1876 _cleanup_globfree_ glob_t g = {
1877 .gl_opendir = (void *(*)(const char *)) opendir_nomod,
1878 };
1879 int r = 0, k;
1880 char **fn;
1881
1882 k = safe_glob(i->path, GLOB_NOSORT|GLOB_BRACE, &g);
1883 if (k < 0 && k != -ENOENT)
1884 return log_error_errno(k, "glob(%s) failed: %m", i->path);
1885
1886 STRV_FOREACH(fn, g.gl_pathv) {
1887 _cleanup_close_ int fd = -1;
936f6bdb
FB		 1888
1889 /* Make sure we won't trigger/follow file object (such as
1890 * device nodes, automounts, ...) pointed out by 'fn' with
1891 * O_PATH. Note, when O_PATH is used, flags other than
1892 * O_CLOEXEC, O_DIRECTORY, and O_NOFOLLOW are ignored. */
1893
1894 fd = open(*fn, O_CLOEXEC|O_NOFOLLOW|O_PATH);
1895 if (fd < 0) {
09f12798
LP		 1896 log_error_errno(errno, "Opening '%s' failed: %m", *fn);
1897 if (r == 0)
1898 r = -errno;
936f6bdb
FB		 1899 continue;
1900 }
1901
9d874aec 1902 k = item_do(i, fd, *fn, action);
936f6bdb
FB		 1903 if (k < 0 && r == 0)
1904 r = k;
1905
1906 /* we passed fd ownership to the previous call */
1907 fd = -1;
c84a9488 1908 }
99e68c0b 1909
99e68c0b
MS		 1910 return r;
1911}
1912
3b63d2d3 1913static int create_item(Item *i) {
294929f8 1914 CreationMode creation;
a2fc2f8d 1915 int r = 0;
5008d581 1916
3b63d2d3 1917 assert(i);
5008d581 1918
582deb84
ZJS		 1919 log_debug("Running create action for entry %c %s", (char) i->type, i->path);
1920
3b63d2d3
LP		 1921 switch (i->type) {
1922
1923 case IGNORE_PATH:
78a92a5a 1924 case IGNORE_DIRECTORY_PATH:
3b63d2d3
LP		 1925 case REMOVE_PATH:
1926 case RECURSIVE_REMOVE_PATH:
1927 return 0;
5008d581 1928
3b63d2d3 1929 case CREATE_FILE:
7fa10748
LP		 1930 RUN_WITH_UMASK(0000)
1931 (void) mkdir_parents_label(i->path, 0755);
1932
31c84ff1 1933 r = create_file(i, i->path);
1845fdd9
DR		 1934 if (r < 0)
1935 return r;
1936 break;
265ffa1e 1937
5ec9d065
FB		 1938 case TRUNCATE_FILE:
1939 RUN_WITH_UMASK(0000)
1940 (void) mkdir_parents_label(i->path, 0755);
1941
1942 r = truncate_file(i, i->path);
1943 if (r < 0)
1944 return r;
1945 break;
1946
7b887f22 1947 case COPY_FILES:
7fa10748
LP		 1948 RUN_WITH_UMASK(0000)
1949 (void) mkdir_parents_label(i->path, 0755);
1950
b1f7b17f 1951 r = copy_files(i);
849958d1
LP		 1952 if (r < 0)
1953 return r;
849958d1
LP		 1954 break;
1955
d4e9eb91 1956 case WRITE_FILE:
936f6bdb 1957 r = glob_item(i, write_one_file);
f05bc3f7
MS		 1958 if (r < 0)
1959 return r;
5008d581 1960
3b63d2d3
LP		 1961 break;
1962
3b63d2d3 1963 case CREATE_DIRECTORY:
d7b8eec7 1964 case TRUNCATE_DIRECTORY:
4c39d899
FB		 1965 RUN_WITH_UMASK(0000)
1966 (void) mkdir_parents_label(i->path, 0755);
1967
1968 r = create_directory(i, i->path);
1969 if (r < 0)
1970 return r;
1971 break;
1972
d7b8eec7 1973 case CREATE_SUBVOLUME:
5fb13eb5
LP		 1974 case CREATE_SUBVOLUME_INHERIT_QUOTA:
1975 case CREATE_SUBVOLUME_NEW_QUOTA:
d7b8eec7 1976 RUN_WITH_UMASK(0000)
7fa10748 1977 (void) mkdir_parents_label(i->path, 0755);
d7b8eec7 1978
4c39d899 1979 r = create_subvolume(i, i->path);
4ad36844
FB		 1980 if (r < 0)
1981 return r;
1982 break;
5fb13eb5 1983
df8dee85 1984 case EMPTY_DIRECTORY:
54946021 1985 r = glob_item(i, empty_directory);
f05bc3f7
MS		 1986 if (r < 0)
1987 return r;
3b63d2d3 1988 break;
ee17ee7c
LP		 1989
1990 case CREATE_FIFO:
a2fc2f8d 1991 RUN_WITH_UMASK(0000)
7fa10748
LP		 1992 (void) mkdir_parents_label(i->path, 0755);
1993
a2fc2f8d 1994 r = create_fifo(i, i->path);
f05bc3f7
MS		 1995 if (r < 0)
1996 return r;
ee17ee7c 1997 break;
a8d88783 1998
5c5ccf12 1999 case CREATE_SYMLINK: {
7fa10748
LP		 2000 RUN_WITH_UMASK(0000)
2001 (void) mkdir_parents_label(i->path, 0755);
2002
ecabcf8b 2003 mac_selinux_create_file_prepare(i->path, S_IFLNK);
4cef1923 2004 r = symlink(i->argument, i->path);
ecabcf8b 2005 mac_selinux_create_file_clear();
e9a5ef7c 2006
468d726b 2007 if (r < 0) {
2e78fa79 2008 _cleanup_free_ char *x = NULL;
468d726b 2009
4a62c710 2010 if (errno != EEXIST)
4cef1923 2011 return log_error_errno(errno, "symlink(%s, %s) failed: %m", i->argument, i->path);
2e78fa79
LP		 2012
2013 r = readlink_malloc(i->path, &x);
4cef1923 2014 if (r < 0 || !streq(i->argument, x)) {
2e78fa79
LP		 2015
2016 if (i->force) {
ecabcf8b 2017 mac_selinux_create_file_prepare(i->path, S_IFLNK);
4cef1923 2018 r = symlink_atomic(i->argument, i->path);
ecabcf8b 2019 mac_selinux_create_file_clear();
2e78fa79 2020
2ef5de1b 2021 if (IN_SET(r, -EISDIR, -EEXIST, -ENOTEMPTY)) {
b3f5897f
WD		 2022 r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL);
2023 if (r < 0)
2024 return log_error_errno(r, "rm -fr %s failed: %m", i->path);
2025
2026 mac_selinux_create_file_prepare(i->path, S_IFLNK);
4cef1923 2027 r = symlink(i->argument, i->path) < 0 ? -errno : 0;
b3f5897f
WD		 2028 mac_selinux_create_file_clear();
2029 }
f647962d 2030 if (r < 0)
4cef1923 2031 return log_error_errno(r, "symlink(%s, %s) failed: %m", i->argument, i->path);
a542c4dc 2032
294929f8 2033 creation = CREATION_FORCE;
1554afae 2034 } else {
582deb84 2035 log_debug("\"%s\" is not a symlink or does not point to the correct path.", i->path);
1554afae
LP		 2036 return 0;
2037 }
294929f8
ZJS		 2038 } else
2039 creation = CREATION_EXISTING;
2040 } else
a542c4dc 2041
294929f8 2042 creation = CREATION_NORMAL;
7a7d5db7 2043 log_debug("%s symlink \"%s\".", creation_mode_verb_to_string(creation), i->path);
468d726b 2044 break;
5c5ccf12 2045 }
468d726b
LP		 2046
2047 case CREATE_BLOCK_DEVICE:
074bd73f 2048 case CREATE_CHAR_DEVICE:
cb7ed9df 2049 if (have_effective_cap(CAP_MKNOD) == 0) {
713998cf
LP		 2050 /* In a container we lack CAP_MKNOD. We shouldn't attempt to create the device node in that
2051 * case to avoid noise, and we don't support virtualized devices in containers anyway. */
cb7ed9df
LP		 2052
2053 log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path);
2054 return 0;
2055 }
2056
7fa10748
LP		 2057 RUN_WITH_UMASK(0000)
2058 (void) mkdir_parents_label(i->path, 0755);
2059
074bd73f 2060 r = create_device(i, i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR);
468d726b
LP		 2061 if (r < 0)
2062 return r;
2063
2064 break;
468d726b 2065
e73a03e0 2066 case ADJUST_MODE:
777b87e7 2067 case RELABEL_PATH:
936f6bdb 2068 r = glob_item(i, path_set_perms);
777b87e7 2069 if (r < 0)
96ca8194 2070 return r;
777b87e7
MS		 2071 break;
2072
a8d88783 2073 case RECURSIVE_RELABEL_PATH:
936f6bdb 2074 r = glob_item_recursively(i, fd_set_perms);
a8d88783
MS		 2075 if (r < 0)
2076 return r;
ebf4e801 2077 break;
e73a03e0 2078
ebf4e801 2079 case SET_XATTR:
936f6bdb 2080 r = glob_item(i, path_set_xattrs);
b705ab6a
ZJS		 2081 if (r < 0)
2082 return r;
2083 break;
2084
2085 case RECURSIVE_SET_XATTR:
936f6bdb 2086 r = glob_item_recursively(i, fd_set_xattrs);
ebf4e801
MW		 2087 if (r < 0)
2088 return r;
e73a03e0 2089 break;
f8eeeaf9
ZJS		 2090
2091 case SET_ACL:
936f6bdb 2092 r = glob_item(i, path_set_acls);
f8eeeaf9
ZJS		 2093 if (r < 0)
2094 return r;
b705ab6a
ZJS		 2095 break;
2096
2097 case RECURSIVE_SET_ACL:
936f6bdb 2098 r = glob_item_recursively(i, fd_set_acls);
b705ab6a
ZJS		 2099 if (r < 0)
2100 return r;
2101 break;
22c3a6ca 2102
88ec4dfa 2103 case SET_ATTRIBUTE:
936f6bdb 2104 r = glob_item(i, path_set_attribute);
22c3a6ca
GB		 2105 if (r < 0)
2106 return r;
2107 break;
2108
88ec4dfa 2109 case RECURSIVE_SET_ATTRIBUTE:
936f6bdb 2110 r = glob_item_recursively(i, fd_set_attribute);
22c3a6ca
GB		 2111 if (r < 0)
2112 return r;
2113 break;
3b63d2d3
LP		 2114 }
2115
f05bc3f7 2116 return 0;
3b63d2d3
LP		 2117}
2118
a0896123 2119static int remove_item_instance(Item *i, const char *instance) {
3b63d2d3
LP		 2120 int r;
2121
2122 assert(i);
2123
2124 switch (i->type) {
2125
3b63d2d3 2126 case REMOVE_PATH:
4a62c710 2127 if (remove(instance) < 0 && errno != ENOENT)
3f93da98 2128 return log_error_errno(errno, "rm(%s): %m", instance);
3b63d2d3
LP		 2129
2130 break;
2131
2132 case TRUNCATE_DIRECTORY:
2133 case RECURSIVE_REMOVE_PATH:
d139b24a
LP		 2134 /* FIXME: we probably should use dir_cleanup() here
2135 * instead of rm_rf() so that 'x' is honoured. */
582deb84 2136 log_debug("rm -rf \"%s\"", instance);
1b26f09e 2137 r = rm_rf(instance, (i->type == RECURSIVE_REMOVE_PATH ? REMOVE_ROOT|REMOVE_SUBVOLUME : 0) | REMOVE_PHYSICAL);
f647962d
MS		 2138 if (r < 0 && r != -ENOENT)
2139 return log_error_errno(r, "rm_rf(%s): %m", instance);
3b63d2d3
LP		 2140
2141 break;
7fcb4b9b
ZJS		 2142
2143 default:
2144 assert_not_reached("wut?");
3b63d2d3
LP		 2145 }
2146
2147 return 0;
2148}
2149
a0896123 2150static int remove_item(Item *i) {
b8bb3e8f
LP		 2151 assert(i);
2152
582deb84
ZJS		 2153 log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
2154
b8bb3e8f
LP		 2155 switch (i->type) {
2156
b8bb3e8f
LP		 2157 case REMOVE_PATH:
2158 case TRUNCATE_DIRECTORY:
99e68c0b 2159 case RECURSIVE_REMOVE_PATH:
936f6bdb 2160 return glob_item(i, remove_item_instance);
b8bb3e8f 2161
df8dee85
ZJS		 2162 default:
2163 return 0;
2164 }
b8bb3e8f
LP		 2165}
2166
78a92a5a 2167static int clean_item_instance(Item *i, const char* instance) {
7fd1b19b 2168 _cleanup_closedir_ DIR *d = NULL;
78a92a5a
MS		 2169 struct stat s, ps;
2170 bool mountpoint;
78a92a5a 2171 usec_t cutoff, n;
582deb84 2172 char timestamp[FORMAT_TIMESTAMP_MAX];
78a92a5a
MS		 2173
2174 assert(i);
2175
2176 if (!i->age_set)
2177 return 0;
2178
2179 n = now(CLOCK_REALTIME);
2180 if (n < i->age)
2181 return 0;
2182
2183 cutoff = n - i->age;
2184
df99a9ef 2185 d = opendir_nomod(instance);
78a92a5a 2186 if (!d) {
d710aaf7 2187 if (IN_SET(errno, ENOENT, ENOTDIR)) {
582deb84 2188 log_debug_errno(errno, "Directory \"%s\": %m", instance);
78a92a5a 2189 return 0;
582deb84 2190 }
78a92a5a 2191
d710aaf7 2192 return log_error_errno(errno, "Failed to open directory %s: %m", instance);
78a92a5a
MS		 2193 }
2194
4a62c710
MS		 2195 if (fstat(dirfd(d), &s) < 0)
2196 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
78a92a5a
MS		 2197
2198 if (!S_ISDIR(s.st_mode)) {
2199 log_error("%s is not a directory.", i->path);
19fbec19 2200 return -ENOTDIR;
78a92a5a
MS		 2201 }
2202
4a62c710
MS		 2203 if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
2204 return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
78a92a5a 2205
2bb158c1 2206 mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino;
78a92a5a 2207
582deb84
ZJS		 2208 log_debug("Cleanup threshold for %s \"%s\" is %s",
2209 mountpoint ? "mount point" : "directory",
2210 instance,
2211 format_timestamp_us(timestamp, sizeof(timestamp), cutoff));
2212
2213 return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,
2214 MAX_DEPTH, i->keep_first_level);
78a92a5a
MS		 2215}
2216
2217static int clean_item(Item *i) {
78a92a5a
MS		 2218 assert(i);
2219
582deb84
ZJS		 2220 log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
2221
78a92a5a
MS		 2222 switch (i->type) {
2223 case CREATE_DIRECTORY:
d7b8eec7 2224 case CREATE_SUBVOLUME:
5fb13eb5
LP		 2225 case CREATE_SUBVOLUME_INHERIT_QUOTA:
2226 case CREATE_SUBVOLUME_NEW_QUOTA:
78a92a5a
MS		 2227 case TRUNCATE_DIRECTORY:
2228 case IGNORE_PATH:
849958d1 2229 case COPY_FILES:
78a92a5a 2230 clean_item_instance(i, i->path);
df8dee85 2231 return 0;
65241c14 2232 case EMPTY_DIRECTORY:
78a92a5a 2233 case IGNORE_DIRECTORY_PATH:
936f6bdb 2234 return glob_item(i, clean_item_instance);
78a92a5a 2235 default:
df8dee85 2236 return 0;
78a92a5a 2237 }
78a92a5a
MS		 2238}
2239
3f93da98
ZJS		 2240static int process_item_array(ItemArray *array);
2241
3b63d2d3 2242static int process_item(Item *i) {
1e95893a 2243 int r, q, p, t = 0;
9348f0e6 2244 _cleanup_free_ char *prefix = NULL;
3b63d2d3
LP		 2245
2246 assert(i);
2247
1910cd0e
LP		 2248 if (i->done)
2249 return 0;
2250
2251 i->done = true;
2252
9348f0e6
ZJS		 2253 prefix = malloc(strlen(i->path) + 1);
2254 if (!prefix)
2255 return log_oom();
2256
1910cd0e 2257 PATH_FOREACH_PREFIX(prefix, i->path) {
3f93da98 2258 ItemArray *j;
1910cd0e 2259
ef43a391 2260 j = ordered_hashmap_get(items, prefix);
1db50423
ZJS		 2261 if (j) {
2262 int s;
2263
3f93da98 2264 s = process_item_array(j);
1db50423
ZJS		 2265 if (s < 0 && t == 0)
2266 t = s;
2267 }
1910cd0e
LP		 2268 }
2269
655f2da0
N		 2270 if (chase_symlinks(i->path, NULL, CHASE_NO_AUTOFS, NULL) == -EREMOTE)
2271 return t;
2272
3b63d2d3 2273 r = arg_create ? create_item(i) : 0;
a0896123 2274 q = arg_remove ? remove_item(i) : 0;
3b63d2d3 2275 p = arg_clean ? clean_item(i) : 0;
6d7b5433
WD		 2276 /* Failure can only be tolerated for create */
2277 if (i->allow_failure)
2278 r = 0;
3b63d2d3 2279
1db50423
ZJS		 2280 return t < 0 ? t :
2281 r < 0 ? r :
2282 q < 0 ? q :
2283 p;
3b63d2d3
LP		 2284}
2285
3f93da98
ZJS		 2286static int process_item_array(ItemArray *array) {
2287 unsigned n;
2288 int r = 0, k;
753615e8 2289
3f93da98
ZJS		 2290 assert(array);
2291
2292 for (n = 0; n < array->count; n++) {
2293 k = process_item(array->items + n);
2294 if (k < 0 && r == 0)
2295 r = k;
2296 }
2297
2298 return r;
2299}
3b63d2d3 2300
3f93da98
ZJS		 2301static void item_free_contents(Item *i) {
2302 assert(i);
3b63d2d3 2303 free(i->path);
468d726b 2304 free(i->argument);
ebf4e801 2305 strv_free(i->xattrs);
f8eeeaf9 2306
349cc4a5 2307#if HAVE_ACL
f8eeeaf9
ZJS		 2308 acl_free(i->acl_access);
2309 acl_free(i->acl_default);
2310#endif
3b63d2d3
LP		 2311}
2312
3f93da98
ZJS		 2313static void item_array_free(ItemArray *a) {
2314 unsigned n;
2315
2316 if (!a)
2317 return;
2318
2319 for (n = 0; n < a->count; n++)
2320 item_free_contents(a->items + n);
2321 free(a->items);
2322 free(a);
2323}
e2f2fb78 2324
93bab288 2325static int item_compare(const Item *a, const Item *b) {
17493fa5
LP		 2326 /* Make sure that the ownership taking item is put first, so
2327 * that we first create the node, and then can adjust it */
2328
93bab288 2329 if (takes_ownership(a->type) && !takes_ownership(b->type))
17493fa5 2330 return -1;
93bab288 2331 if (!takes_ownership(a->type) && takes_ownership(b->type))
17493fa5
LP		 2332 return 1;
2333
93bab288 2334 return CMP(a->type, b->type);
17493fa5
LP		 2335}
2336
3f93da98 2337static bool item_compatible(Item *a, Item *b) {
bfe95f35
LP		 2338 assert(a);
2339 assert(b);
3f93da98 2340 assert(streq(a->path, b->path));
bfe95f35 2341
3f93da98
ZJS		 2342 if (takes_ownership(a->type) && takes_ownership(b->type))
2343 /* check if the items are the same */
2344 return streq_ptr(a->argument, b->argument) &&
bfe95f35 2345
3f93da98
ZJS		 2346 a->uid_set == b->uid_set &&
2347 a->uid == b->uid &&
bfe95f35 2348
3f93da98
ZJS		 2349 a->gid_set == b->gid_set &&
2350 a->gid == b->gid &&
bfe95f35 2351
3f93da98
ZJS		 2352 a->mode_set == b->mode_set &&
2353 a->mode == b->mode &&
bfe95f35 2354
3f93da98
ZJS		 2355 a->age_set == b->age_set &&
2356 a->age == b->age &&
bfe95f35 2357
3f93da98 2358 a->mask_perms == b->mask_perms &&
bfe95f35 2359
3f93da98 2360 a->keep_first_level == b->keep_first_level &&
468d726b 2361
3f93da98 2362 a->major_minor == b->major_minor;
468d726b 2363
bfe95f35
LP		 2364 return true;
2365}
2366
a2aced4a
DR		 2367static bool should_include_path(const char *path) {
2368 char **prefix;
2369
abef3f91 2370 STRV_FOREACH(prefix, arg_exclude_prefixes)
582deb84
ZJS		 2371 if (path_startswith(path, *prefix)) {
2372 log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
2373 path, *prefix);
5c795114 2374 return false;
582deb84 2375 }
a2aced4a 2376
abef3f91 2377 STRV_FOREACH(prefix, arg_include_prefixes)
582deb84
ZJS		 2378 if (path_startswith(path, *prefix)) {
2379 log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
a2aced4a 2380 return true;
582deb84 2381 }
a2aced4a 2382
5c795114
DR		 2383 /* no matches, so we should include this path only if we
2384 * have no whitelist at all */
7b943bb7 2385 if (strv_isempty(arg_include_prefixes))
582deb84
ZJS		 2386 return true;
2387
2388 log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
2389 return false;
a2aced4a
DR		 2390}
2391
4cef1923
FB		 2392static int specifier_expansion_from_arg(Item *i) {
2393 _cleanup_free_ char *unescaped = NULL, *resolved = NULL;
2394 char **xattr;
2395 int r;
2396
2397 assert(i);
2398
2399 if (i->argument == NULL)
2400 return 0;
2401
2402 switch (i->type) {
2403 case COPY_FILES:
2404 case CREATE_SYMLINK:
2405 case CREATE_FILE:
2406 case TRUNCATE_FILE:
2407 case WRITE_FILE:
2408 r = cunescape(i->argument, 0, &unescaped);
2409 if (r < 0)
2410 return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);
2411
2412 r = specifier_printf(unescaped, specifier_table, NULL, &resolved);
2413 if (r < 0)
2414 return r;
2415
2416 free_and_replace(i->argument, resolved);
2417 break;
2418
2419 case SET_XATTR:
2420 case RECURSIVE_SET_XATTR:
2421 assert(i->xattrs);
2422
2423 STRV_FOREACH (xattr, i->xattrs) {
2424 r = specifier_printf(*xattr, specifier_table, NULL, &resolved);
2425 if (r < 0)
2426 return r;
2427
2428 free_and_replace(*xattr, resolved);
2429 }
2430 break;
2431
2432 default:
2433 break;
2434 }
2435 return 0;
2436}
2437
a2d1fb88
LP		 2438static int patch_var_run(const char *fname, unsigned line, char **path) {
2439 const char *k;
2440 char *n;
2441
2442 assert(path);
2443 assert(*path);
2444
2445 /* Optionally rewrites lines referencing /var/run/, to use /run/ instead. Why bother? tmpfiles merges lines in
2446 * some cases and detects conflicts in others. If files/directories are specified through two equivalent lines
2447 * this is problematic as neither case will be detected. Ideally we'd detect these cases by resolving symlinks
2448 * early, but that's precisely not what we can do here as this code very likely is running very early on, at a
2449 * time where the paths in question are not available yet, or even more importantly, our own tmpfiles rules
2450 * might create the paths that are intermediary to the listed paths. We can't really cover the generic case,
2451 * but the least we can do is cover the specific case of /var/run vs. /run, as /var/run is a legacy name for
2452 * /run only, and we explicitly document that and require that on systemd systems the former is a symlink to
2453 * the latter. Moreover files below this path are by far the primary usecase for tmpfiles.d/. */
2454
2455 k = path_startswith(*path, "/var/run/");
2456 if (isempty(k)) /* Don't complain about other paths than /var/run, and not about /var/run itself either. */
2457 return 0;
2458
2459 n = strjoin("/run/", k);
2460 if (!n)
2461 return log_oom();
2462
2463 /* Also log about this briefly. We do so at LOG_NOTICE level, as we fixed up the situation automatically, hence
2464 * there's no immediate need for action by the user. However, in the interest of making things less confusing
2465 * to the user, let's still inform the user that these snippets should really be updated. */
2466
2467 log_notice("[%s:%u] Line references path below legacy directory /var/run/, updating %s → %s; please update the tmpfiles.d/ drop-in file accordingly.", fname, line, *path, n);
2468
2469 free(*path);
2470 *path = n;
2471
2472 return 0;
2473}
2474
d9daae55 2475static int parse_line(const char *fname, unsigned line, const char *buffer, bool *invalid_config) {
1731e34a 2476
cde684a2 2477 _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
3f93da98
ZJS		 2478 _cleanup_(item_free_contents) Item i = {};
2479 ItemArray *existing;
ef43a391 2480 OrderedHashmap *h;
657cf7f4 2481 int r, pos;
6d7b5433 2482 bool force = false, boot = false, allow_failure = false;
3b63d2d3
LP		 2483
2484 assert(fname);
2485 assert(line >= 1);
2486 assert(buffer);
2487
68685607 2488 r = extract_many_words(
4034a06d 2489 &buffer,
68685607 2490 NULL,
12ba2c44 2491 EXTRACT_QUOTES,
4034a06d
LP		 2492 &action,
2493 &path,
2494 &mode,
2495 &user,
2496 &group,
2497 &age,
2498 NULL);
d9daae55 2499 if (r < 0) {
751223fe
ZJS		 2500 if (IN_SET(r, -EINVAL, -EBADSLT))
2501 /* invalid quoting and such or an unknown specifier */
d9daae55 2502 *invalid_config = true;
657cf7f4 2503 return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
4b93699d 2504 } else if (r < 2) {
d9daae55 2505 *invalid_config = true;
3b63d2d3 2506 log_error("[%s:%u] Syntax error.", fname, line);
7f2c1f4d 2507 return -EIO;
5008d581
LP		 2508 }
2509
aa5f6817 2510 if (!isempty(buffer) && !streq(buffer, "-")) {
4034a06d
LP		 2511 i.argument = strdup(buffer);
2512 if (!i.argument)
2513 return log_oom();
2514 }
2515
2e78fa79 2516 if (isempty(action)) {
d9daae55 2517 *invalid_config = true;
2e78fa79 2518 log_error("[%s:%u] Command too short '%s'.", fname, line, action);
c4708f13 2519 return -EINVAL;
2e78fa79
LP		 2520 }
2521
5f255144
ZJS		 2522 for (pos = 1; action[pos]; pos++) {
2523 if (action[pos] == '!' && !boot)
2524 boot = true;
2525 else if (action[pos] == '+' && !force)
2526 force = true;
6d7b5433
WD		 2527 else if (action[pos] == '-' && !allow_failure)
2528 allow_failure = true;
5f255144 2529 else {
d9daae55 2530 *invalid_config = true;
5f255144
ZJS		 2531 log_error("[%s:%u] Unknown modifiers in command '%s'",
2532 fname, line, action);
2533 return -EINVAL;
2534 }
2e78fa79
LP		 2535 }
2536
582deb84
ZJS		 2537 if (boot && !arg_boot) {
2538 log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",
2539 action, path);
c4708f13 2540 return 0;
582deb84 2541 }
c4708f13 2542
3f93da98
ZJS		 2543 i.type = action[0];
2544 i.force = force;
6d7b5433 2545 i.allow_failure = allow_failure;
2e78fa79 2546
3f93da98 2547 r = specifier_printf(path, specifier_table, NULL, &i.path);
5a8575ef 2548 if (r == -ENXIO)
4cef1923 2549 return log_unresolvable_specifier(fname, line);
d9daae55 2550 if (r < 0) {
751223fe
ZJS		 2551 if (IN_SET(r, -EINVAL, -EBADSLT))
2552 *invalid_config = true;
4cef1923 2553 return log_error_errno(r, "[%s:%u] Failed to replace specifiers: %s", fname, line, path);
d9daae55 2554 }
1731e34a 2555
a2d1fb88
LP		 2556 r = patch_var_run(fname, line, &i.path);
2557 if (r < 0)
2558 return r;
2559
3f93da98 2560 switch (i.type) {
468d726b 2561
777b87e7 2562 case CREATE_DIRECTORY:
d7b8eec7 2563 case CREATE_SUBVOLUME:
5fb13eb5
LP		 2564 case CREATE_SUBVOLUME_INHERIT_QUOTA:
2565 case CREATE_SUBVOLUME_NEW_QUOTA:
df8dee85 2566 case EMPTY_DIRECTORY:
777b87e7
MS		 2567 case TRUNCATE_DIRECTORY:
2568 case CREATE_FIFO:
2569 case IGNORE_PATH:
78a92a5a 2570 case IGNORE_DIRECTORY_PATH:
777b87e7
MS		 2571 case REMOVE_PATH:
2572 case RECURSIVE_REMOVE_PATH:
e73a03e0 2573 case ADJUST_MODE:
777b87e7
MS		 2574 case RELABEL_PATH:
2575 case RECURSIVE_RELABEL_PATH:
c82500c6 2576 if (i.argument)
bd550f78 2577 log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
c82500c6
LP		 2578
2579 break;
2580
2581 case CREATE_FILE:
2582 case TRUNCATE_FILE:
777b87e7 2583 break;
468d726b
LP		 2584
2585 case CREATE_SYMLINK:
3f93da98
ZJS		 2586 if (!i.argument) {
2587 i.argument = strappend("/usr/share/factory/", i.path);
2588 if (!i.argument)
2f3b873a 2589 return log_oom();
468d726b
LP		 2590 }
2591 break;
2592
31ed59c5 2593 case WRITE_FILE:
3f93da98 2594 if (!i.argument) {
d9daae55 2595 *invalid_config = true;
31ed59c5 2596 log_error("[%s:%u] Write file requires argument.", fname, line);
7f2c1f4d 2597 return -EBADMSG;
31ed59c5
LP		 2598 }
2599 break;
2600
849958d1 2601 case COPY_FILES:
3f93da98
ZJS		 2602 if (!i.argument) {
2603 i.argument = strappend("/usr/share/factory/", i.path);
2604 if (!i.argument)
2f3b873a 2605 return log_oom();
3f93da98 2606 } else if (!path_is_absolute(i.argument)) {
d9daae55 2607 *invalid_config = true;
849958d1
LP		 2608 log_error("[%s:%u] Source path is not absolute.", fname, line);
2609 return -EBADMSG;
2610 }
2611
858d36c1 2612 path_simplify(i.argument, false);
849958d1
LP		 2613 break;
2614
468d726b
LP		 2615 case CREATE_CHAR_DEVICE:
2616 case CREATE_BLOCK_DEVICE: {
2617 unsigned major, minor;
2618
3f93da98 2619 if (!i.argument) {
d9daae55 2620 *invalid_config = true;
468d726b 2621 log_error("[%s:%u] Device file requires argument.", fname, line);
7f2c1f4d 2622 return -EBADMSG;
468d726b
LP		 2623 }
2624
3f93da98 2625 if (sscanf(i.argument, "%u:%u", &major, &minor) != 2) {
d9daae55 2626 *invalid_config = true;
3f93da98 2627 log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
7f2c1f4d 2628 return -EBADMSG;
468d726b
LP		 2629 }
2630
3f93da98 2631 i.major_minor = makedev(major, minor);
468d726b
LP		 2632 break;
2633 }
2634
ebf4e801 2635 case SET_XATTR:
b705ab6a 2636 case RECURSIVE_SET_XATTR:
3f93da98 2637 if (!i.argument) {
d9daae55 2638 *invalid_config = true;
ebf4e801
MW		 2639 log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
2640 return -EBADMSG;
2641 }
bd550f78 2642 r = parse_xattrs_from_arg(&i);
ebf4e801
MW		 2643 if (r < 0)
2644 return r;
2645 break;
2646
f8eeeaf9 2647 case SET_ACL:
b705ab6a 2648 case RECURSIVE_SET_ACL:
f8eeeaf9 2649 if (!i.argument) {
d9daae55 2650 *invalid_config = true;
f8eeeaf9
ZJS		 2651 log_error("[%s:%u] Set ACLs requires argument.", fname, line);
2652 return -EBADMSG;
2653 }
bd550f78 2654 r = parse_acls_from_arg(&i);
f8eeeaf9
ZJS		 2655 if (r < 0)
2656 return r;
2657 break;
2658
88ec4dfa
LP		 2659 case SET_ATTRIBUTE:
2660 case RECURSIVE_SET_ATTRIBUTE:
22c3a6ca 2661 if (!i.argument) {
d9daae55 2662 *invalid_config = true;
88ec4dfa 2663 log_error("[%s:%u] Set file attribute requires argument.", fname, line);
22c3a6ca
GB		 2664 return -EBADMSG;
2665 }
bd550f78 2666 r = parse_attribute_from_arg(&i);
751223fe 2667 if (IN_SET(r, -EINVAL, -EBADSLT))
d9daae55 2668 *invalid_config = true;
22c3a6ca
GB		 2669 if (r < 0)
2670 return r;
2671 break;
2672
777b87e7 2673 default:
582deb84 2674 log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
d9daae55 2675 *invalid_config = true;
7f2c1f4d 2676 return -EBADMSG;
3b63d2d3 2677 }
468d726b 2678
3f93da98
ZJS		 2679 if (!path_is_absolute(i.path)) {
2680 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
d9daae55 2681 *invalid_config = true;
7f2c1f4d 2682 return -EBADMSG;
3b63d2d3
LP		 2683 }
2684
858d36c1 2685 path_simplify(i.path, false);
3b63d2d3 2686
3f93da98 2687 if (!should_include_path(i.path))
7f2c1f4d 2688 return 0;
5008d581 2689
4cef1923 2690 r = specifier_expansion_from_arg(&i);
5a8575ef 2691 if (r == -ENXIO)
4cef1923 2692 return log_unresolvable_specifier(fname, line);
751223fe
ZJS		 2693 if (r < 0) {
2694 if (IN_SET(r, -EINVAL, -EBADSLT))
2695 *invalid_config = true;
4cef1923
FB		 2696 return log_error_errno(r, "[%s:%u] Failed to substitute specifiers in argument: %m",
2697 fname, line);
751223fe 2698 }
4cef1923 2699
cf9a4abd 2700 if (arg_root) {
cde684a2
LP		 2701 char *p;
2702
1d13f648 2703 p = prefix_root(arg_root, i.path);
cf9a4abd
MM		 2704 if (!p)
2705 return log_oom();
2706
3f93da98
ZJS		 2707 free(i.path);
2708 i.path = p;
cf9a4abd
MM		 2709 }
2710
90937fe3 2711 if (!isempty(user) && !streq(user, "-")) {
4b67834e
LP		 2712 const char *u = user;
2713
fafff8f1 2714 r = get_user_creds(&u, &i.uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING);
4b67834e 2715 if (r < 0) {
d9daae55
ZJS		 2716 *invalid_config = true;
2717 return log_error_errno(r, "[%s:%u] Unknown user '%s'.", fname, line, user);
3b63d2d3
LP		 2718 }
2719
3f93da98 2720 i.uid_set = true;
3b63d2d3
LP		 2721 }
2722
90937fe3 2723 if (!isempty(group) && !streq(group, "-")) {
4b67834e
LP		 2724 const char *g = group;
2725
fafff8f1 2726 r = get_group_creds(&g, &i.gid, USER_CREDS_ALLOW_MISSING);
4b67834e 2727 if (r < 0) {
d9daae55 2728 *invalid_config = true;
3b63d2d3 2729 log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
7f2c1f4d 2730 return r;
3b63d2d3
LP		 2731 }
2732
3f93da98 2733 i.gid_set = true;
3b63d2d3
LP		 2734 }
2735
90937fe3 2736 if (!isempty(mode) && !streq(mode, "-")) {
abef3f91 2737 const char *mm = mode;
3b63d2d3
LP		 2738 unsigned m;
2739
abef3f91 2740 if (*mm == '~') {
3f93da98 2741 i.mask_perms = true;
abef3f91
LP		 2742 mm++;
2743 }
2744
2ff7b0a5 2745 if (parse_mode(mm, &m) < 0) {
d9daae55 2746 *invalid_config = true;
3b63d2d3 2747 log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
2ff7b0a5 2748 return -EBADMSG;
3b63d2d3
LP		 2749 }
2750
3f93da98
ZJS		 2751 i.mode = m;
2752 i.mode_set = true;
3b63d2d3 2753 } else
5fb13eb5 2754 i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
3b63d2d3 2755
90937fe3 2756 if (!isempty(age) && !streq(age, "-")) {
24f3a374
LP		 2757 const char *a = age;
2758
2759 if (*a == '~') {
3f93da98 2760 i.keep_first_level = true;
24f3a374
LP		 2761 a++;
2762 }
2763
3f93da98 2764 if (parse_sec(a, &i.age) < 0) {
d9daae55 2765 *invalid_config = true;
3b63d2d3 2766 log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
7f2c1f4d 2767 return -EBADMSG;
3b63d2d3
LP		 2768 }
2769
3f93da98 2770 i.age_set = true;
3b63d2d3
LP		 2771 }
2772
3f93da98 2773 h = needs_glob(i.type) ? globs : items;
bfe95f35 2774
ef43a391 2775 existing = ordered_hashmap_get(h, i.path);
468d726b 2776 if (existing) {
3f93da98
ZJS		 2777 unsigned n;
2778
2779 for (n = 0; n < existing->count; n++) {
6487ada8 2780 if (!item_compatible(existing->items + n, &i)) {
e286dbaf
ZJS		 2781 log_notice("[%s:%u] Duplicate line for path \"%s\", ignoring.",
2782 fname, line, i.path);
6487ada8
MP		 2783 return 0;
2784 }
ebf4e801
MW		 2785 }
2786 } else {
3f93da98 2787 existing = new0(ItemArray, 1);
07982ed1
LP		 2788 if (!existing)
2789 return log_oom();
2790
ef43a391 2791 r = ordered_hashmap_put(h, i.path, existing);
3f93da98
ZJS		 2792 if (r < 0)
2793 return log_oom();
bfe95f35
LP		 2794 }
2795
3f93da98
ZJS		 2796 if (!GREEDY_REALLOC(existing->items, existing->size, existing->count + 1))
2797 return log_oom();
5008d581 2798
3f93da98 2799 memcpy(existing->items + existing->count++, &i, sizeof(i));
dd449aca
ZJS		 2800
2801 /* Sort item array, to enforce stable ordering of application */
93bab288 2802 typesafe_qsort(existing->items, existing->count, item_compare);
17493fa5 2803
3f93da98 2804 zero(i);
7f2c1f4d 2805 return 0;
5008d581
LP		 2806}
2807
ceaaeb9b
ZJS		 2808static int cat_config(char **config_dirs, char **args) {
2809 _cleanup_strv_free_ char **files = NULL;
2810 int r;
2811
2812 r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, NULL);
2813 if (r < 0)
2814 return r;
2815
2816 return cat_files(NULL, files, 0);
2817}
2818
37ec0fdd
LP		 2819static int help(void) {
2820 _cleanup_free_ char *link = NULL;
2821 int r;
2822
2823 r = terminal_urlify_man("systemd-tmpfiles", "8", &link);
2824 if (r < 0)
2825 return log_oom();
2826
522d4a49
LP		 2827 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
2828 "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
5c795114 2829 " -h --help Show this help\n"
f2b5ca0e 2830 " --user Execute user configuration\n"
eb9da376 2831 " --version Show package version\n"
ceaaeb9b 2832 " --cat-config Show configuration files\n"
5c795114
DR		 2833 " --create Create marked files/directories\n"
2834 " --clean Clean up marked directories\n"
2835 " --remove Remove marked files/directories\n"
81815651 2836 " --boot Execute actions only safe at boot\n"
79ca888f
ZJS		 2837 " --prefix=PATH Only apply rules with the specified prefix\n"
2838 " --exclude-prefix=PATH Ignore rules with the specified prefix\n"
d9daae55 2839 " --root=PATH Operate on an alternate filesystem root\n"
a6d8474f 2840 " --replace=PATH Treat arguments as replacement for PATH\n"
dcd5c891 2841 " --no-pager Do not pipe output into a pager\n"
37ec0fdd
LP		 2842 "\nSee the %s for details.\n"
2843 , program_invocation_short_name
2844 , link
2845 );
2846
2847 return 0;
3b63d2d3
LP		 2848}
2849
2850static int parse_argv(int argc, char *argv[]) {
2851
2852 enum {
eb9da376 2853 ARG_VERSION = 0x100,
ceaaeb9b 2854 ARG_CAT_CONFIG,
f2b5ca0e 2855 ARG_USER,
3b63d2d3
LP		 2856 ARG_CREATE,
2857 ARG_CLEAN,
fba6e687 2858 ARG_REMOVE,
81815651 2859 ARG_BOOT,
5c795114
DR		 2860 ARG_PREFIX,
2861 ARG_EXCLUDE_PREFIX,
cf9a4abd 2862 ARG_ROOT,
a6d8474f 2863 ARG_REPLACE,
dcd5c891 2864 ARG_NO_PAGER,
3b63d2d3
LP		 2865 };
2866
2867 static const struct option options[] = {
5c795114 2868 { "help", no_argument, NULL, 'h' },
f2b5ca0e 2869 { "user", no_argument, NULL, ARG_USER },
eb9da376 2870 { "version", no_argument, NULL, ARG_VERSION },
ceaaeb9b 2871 { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
5c795114
DR		 2872 { "create", no_argument, NULL, ARG_CREATE },
2873 { "clean", no_argument, NULL, ARG_CLEAN },
2874 { "remove", no_argument, NULL, ARG_REMOVE },
81815651 2875 { "boot", no_argument, NULL, ARG_BOOT },
5c795114
DR		 2876 { "prefix", required_argument, NULL, ARG_PREFIX },
2877 { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
cf9a4abd 2878 { "root", required_argument, NULL, ARG_ROOT },
a6d8474f 2879 { "replace", required_argument, NULL, ARG_REPLACE },
dcd5c891 2880 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
eb9da376 2881 {}
3b63d2d3
LP		 2882 };
2883
0f474365 2884 int c, r;
3b63d2d3
LP		 2885
2886 assert(argc >= 0);
2887 assert(argv);
2888
601185b4 2889 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
3b63d2d3
LP		 2890
2891 switch (c) {
2892
2893 case 'h':
37ec0fdd 2894 return help();
eb9da376
LP		 2895
2896 case ARG_VERSION:
3f6fd1ba 2897 return version();
3b63d2d3 2898
ceaaeb9b
ZJS		 2899 case ARG_CAT_CONFIG:
2900 arg_cat_config = true;
2901 break;
2902
f2b5ca0e
ZJS		 2903 case ARG_USER:
2904 arg_user = true;
2905 break;
2906
3b63d2d3
LP		 2907 case ARG_CREATE:
2908 arg_create = true;
2909 break;
2910
2911 case ARG_CLEAN:
2912 arg_clean = true;
2913 break;
2914
2915 case ARG_REMOVE:
2916 arg_remove = true;
2917 break;
2918
81815651
ZJS		 2919 case ARG_BOOT:
2920 arg_boot = true;
c4708f13
ZJS		 2921 break;
2922
fba6e687 2923 case ARG_PREFIX:
7bc040fa 2924 if (strv_push(&arg_include_prefixes, optarg) < 0)
a2aced4a 2925 return log_oom();
fba6e687
LP		 2926 break;
2927
5c795114 2928 case ARG_EXCLUDE_PREFIX:
7bc040fa 2929 if (strv_push(&arg_exclude_prefixes, optarg) < 0)
5c795114
DR		 2930 return log_oom();
2931 break;
2932
cf9a4abd 2933 case ARG_ROOT:
0f03c2a4 2934 r = parse_path_argument_and_warn(optarg, true, &arg_root);
0f474365 2935 if (r < 0)
0f03c2a4 2936 return r;
cf9a4abd
MM		 2937 break;
2938
a6d8474f
ZJS		 2939 case ARG_REPLACE:
2940 if (!path_is_absolute(optarg) ||
2941 !endswith(optarg, ".conf")) {
2942 log_error("The argument to --replace= must an absolute path to a config file");
2943 return -EINVAL;
2944 }
2945
2946 arg_replace = optarg;
2947 break;
2948
dcd5c891
LP		 2949 case ARG_NO_PAGER:
2950 arg_no_pager = true;
2951 break;
2952
3b63d2d3
LP		 2953 case '?':
2954 return -EINVAL;
2955
2956 default:
eb9da376 2957 assert_not_reached("Unhandled option");
3b63d2d3 2958 }
3b63d2d3 2959
ceaaeb9b 2960 if (!arg_clean && !arg_create && !arg_remove && !arg_cat_config) {
35b8ca3a 2961 log_error("You need to specify at least one of --clean, --create or --remove.");
3b63d2d3
LP		 2962 return -EINVAL;
2963 }
2964
ceaaeb9b
ZJS		 2965 if (arg_replace && arg_cat_config) {
2966 log_error("Option --replace= is not supported with --cat-config");
2967 return -EINVAL;
2968 }
2969
a6d8474f
ZJS		 2970 if (arg_replace && optind >= argc) {
2971 log_error("When --replace= is given, some configuration items must be specified");
2972 return -EINVAL;
2973 }
2974
3b63d2d3
LP		 2975 return 1;
2976}
2977
a6d8474f 2978static int read_config_file(char **config_dirs, const char *fn, bool ignore_enoent, bool *invalid_config) {
f7ac1ed2
ZJS		 2979 _cleanup_fclose_ FILE *_f = NULL;
2980 FILE *f;
1731e34a 2981 char line[LINE_MAX];
78a92a5a 2982 Iterator iterator;
1731e34a 2983 unsigned v = 0;
78a92a5a 2984 Item *i;
4e68ec18 2985 int r = 0;
fba6e687
LP		 2986
2987 assert(fn);
2988
f7ac1ed2 2989 if (streq(fn, "-")) {
a6d8474f 2990 log_debug("Reading config from stdin…");
f7ac1ed2
ZJS		 2991 fn = "<stdin>";
2992 f = stdin;
2993 } else {
a6d8474f 2994 r = search_and_fopen(fn, "re", arg_root, (const char**) config_dirs, &_f);
f7ac1ed2
ZJS		 2995 if (r < 0) {
2996 if (ignore_enoent && r == -ENOENT) {
2997 log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
2998 return 0;
2999 }
fba6e687 3000
f7ac1ed2
ZJS		 3001 return log_error_errno(r, "Failed to open '%s': %m", fn);
3002 }
a6d8474f 3003 log_debug("Reading config file \"%s\"…", fn);
f7ac1ed2 3004 f = _f;
fba6e687
LP		 3005 }
3006
1731e34a
LP		 3007 FOREACH_LINE(line, f, break) {
3008 char *l;
fba6e687 3009 int k;
d9daae55 3010 bool invalid_line = false;
fba6e687 3011
fba6e687
LP		 3012 v++;
3013
3014 l = strstrip(line);
4c701096 3015 if (IN_SET(*l, 0, '#'))
fba6e687
LP		 3016 continue;
3017
d9daae55
ZJS		 3018 k = parse_line(fn, v, l, &invalid_line);
3019 if (k < 0) {
3020 if (invalid_line)
3021 /* Allow reporting with a special code if the caller requested this */
3022 *invalid_config = true;
3023 else if (r == 0)
3024 /* The first error becomes our return value */
3025 r = k;
3026 }
fba6e687
LP		 3027 }
3028
78a92a5a 3029 /* we have to determine age parameter for each entry of type X */
ef43a391 3030 ORDERED_HASHMAP_FOREACH(i, globs, iterator) {
78a92a5a
MS		 3031 Iterator iter;
3032 Item *j, *candidate_item = NULL;
3033
3034 if (i->type != IGNORE_DIRECTORY_PATH)
3035 continue;
3036
ef43a391 3037 ORDERED_HASHMAP_FOREACH(j, items, iter) {
5fb13eb5 3038 if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))
78a92a5a
MS		 3039 continue;
3040
3041 if (path_equal(j->path, i->path)) {
3042 candidate_item = j;
3043 break;
3044 }
3045
3046 if ((!candidate_item && path_startswith(i->path, j->path)) ||
3047 (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
3048 candidate_item = j;
3049 }
3050
9ed2a35e 3051 if (candidate_item && candidate_item->age_set) {
78a92a5a
MS		 3052 i->age = candidate_item->age;
3053 i->age_set = true;
3054 }
3055 }
3056
fba6e687 3057 if (ferror(f)) {
56f64d95 3058 log_error_errno(errno, "Failed to read from file %s: %m", fn);
fba6e687
LP		 3059 if (r == 0)
3060 r = -EIO;
3061 }
3062
fba6e687
LP		 3063 return r;
3064}
3065
a6d8474f
ZJS		 3066static int parse_arguments(char **config_dirs, char **args, bool *invalid_config) {
3067 char **arg;
3068 int r;
3069
3070 STRV_FOREACH(arg, args) {
3071 r = read_config_file(config_dirs, *arg, false, invalid_config);
3072 if (r < 0)
3073 return r;
3074 }
3075
3076 return 0;
3077}
3078
3079static int read_config_files(char **config_dirs, char **args, bool *invalid_config) {
3080 _cleanup_strv_free_ char **files = NULL;
3081 _cleanup_free_ char *p = NULL;
3082 char **f;
3083 int r;
3084
ceaaeb9b 3085 r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, &p);
a6d8474f 3086 if (r < 0)
ceaaeb9b 3087 return r;
a6d8474f
ZJS		 3088
3089 STRV_FOREACH(f, files)
3090 if (p && path_equal(*f, p)) {
3091 log_debug("Parsing arguments at position \"%s\"…", *f);
3092
3093 r = parse_arguments(config_dirs, args, invalid_config);
3094 if (r < 0)
3095 return r;
3096 } else
3097 /* Just warn, ignore result otherwise.
3098 * read_config_file() has some debug output, so no need to print anything. */
3099 (void) read_config_file(config_dirs, *f, true, invalid_config);
3100
3101 return 0;
3102}
3103
5008d581 3104int main(int argc, char *argv[]) {
bb9947be 3105 int r, k, r_process = 0;
3f93da98 3106 ItemArray *a;
3b63d2d3 3107 Iterator iterator;
f2b5ca0e 3108 _cleanup_strv_free_ char **config_dirs = NULL;
d9daae55 3109 bool invalid_config = false;
3b63d2d3 3110
fdcad0c2
LP		 3111 r = parse_argv(argc, argv);
3112 if (r <= 0)
753615e8 3113 goto finish;
5008d581 3114
eb0ca9eb 3115 log_set_target(LOG_TARGET_AUTO);
5008d581
LP		 3116 log_parse_environment();
3117 log_open();
3118
f2b5ca0e
ZJS		 3119 if (arg_user) {
3120 r = user_config_paths(&config_dirs);
3121 if (r < 0) {
3122 log_error_errno(r, "Failed to initialize configuration directory list: %m");
3123 goto finish;
3124 }
3125 } else {
3126 config_dirs = strv_split_nulstr(CONF_PATHS_NULSTR("tmpfiles.d"));
3127 if (!config_dirs) {
3128 r = log_oom();
3129 goto finish;
3130 }
3131 }
3132
79c91cec 3133 if (DEBUG_LOGGING) {
f2b5ca0e
ZJS		 3134 _cleanup_free_ char *t = NULL;
3135
3136 t = strv_join(config_dirs, "\n\t");
3137 if (t)
bb9947be 3138 log_debug("Looking for configuration files in (higher priority first):\n\t%s", t);
f2b5ca0e
ZJS		 3139 }
3140
ceaaeb9b 3141 if (arg_cat_config) {
dcd5c891
LP		 3142 (void) pager_open(arg_no_pager, false);
3143
ceaaeb9b
ZJS		 3144 r = cat_config(config_dirs, argv + optind);
3145 goto finish;
3146 }
3147
3148 umask(0022);
3149
3150 mac_selinux_init();
3151
3152 items = ordered_hashmap_new(&string_hash_ops);
3153 globs = ordered_hashmap_new(&string_hash_ops);
3154
3155 if (!items || !globs) {
3156 r = log_oom();
3157 goto finish;
3158 }
3159
a6d8474f
ZJS		 3160 /* If command line arguments are specified along with --replace, read all
3161 * configuration files and insert the positional arguments at the specified
3162 * place. Otherwise, if command line arguments are specified, execute just
3163 * them, and finally, without --replace= or any positional arguments, just
3164 * read configuration and execute it.
3165 */
3166 if (arg_replace || optind >= argc)
3167 r = read_config_files(config_dirs, argv + optind, &invalid_config);
3168 else
3169 r = parse_arguments(config_dirs, argv + optind, &invalid_config);
3170 if (r < 0)
3171 goto finish;
5008d581 3172
17493fa5
LP		 3173 /* The non-globbing ones usually create things, hence we apply
3174 * them first */
ef43a391 3175 ORDERED_HASHMAP_FOREACH(a, items, iterator) {
3f93da98 3176 k = process_item_array(a);
bb9947be
ZJS		 3177 if (k < 0 && r_process == 0)
3178 r_process = k;
1db50423 3179 }
b8bb3e8f 3180
17493fa5
LP		 3181 /* The globbing ones usually alter things, hence we apply them
3182 * second. */
ef43a391 3183 ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
3f93da98 3184 k = process_item_array(a);
bb9947be
ZJS		 3185 if (k < 0 && r_process == 0)
3186 r_process = k;
1db50423 3187 }
3b63d2d3 3188
5008d581 3189finish:
dcd5c891
LP		 3190 pager_close();
3191
224b0e7a
ZJS		 3192 ordered_hashmap_free_with_destructor(items, item_array_free);
3193 ordered_hashmap_free_with_destructor(globs, item_array_free);
5008d581 3194
7bc040fa
LP		 3195 free(arg_include_prefixes);
3196 free(arg_exclude_prefixes);
cf9a4abd 3197 free(arg_root);
a2aced4a 3198
17b90525
LP		 3199 set_free_free(unix_sockets);
3200
cc56fafe 3201 mac_selinux_finish();
29003cff 3202
bb9947be 3203 if (r < 0 || ERRNO_IS_RESOURCE(-r_process))
d9daae55
ZJS		 3204 return EXIT_FAILURE;
3205 else if (invalid_config)
3206 return EX_DATAERR;
bb9947be
ZJS		 3207 else if (r_process < 0)
3208 return EX_CANTCREAT;
d9daae55
ZJS		 3209 else
3210 return EXIT_SUCCESS;
5008d581 3211}
Unnamed repository; edit this file 'description' to name the repository.