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Merge pull request #11827 from keszybz/pkgconfig-variables
[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>
52b32b2a 15#include <sys/file.h>
505ef0e3 16#include <sys/stat.h>
ebf4e801 17#include <sys/xattr.h>
d9daae55 18#include <sysexits.h>
3f6fd1ba
LP		 19#include <time.h>
20#include <unistd.h>
5008d581 21
5a8575ef
ZJS		 22#include "sd-path.h"
23
3f6fd1ba 24#include "acl-util.h"
b5efdb8a 25#include "alloc-util.h"
3f6fd1ba 26#include "btrfs-util.h"
430f0182 27#include "capability-util.h"
c8b3094d 28#include "chattr-util.h"
3f6fd1ba
LP		 29#include "conf-files.h"
30#include "copy.h"
a0f29c76 31#include "def.h"
8fb3f009 32#include "dirent-util.h"
4f5dd394 33#include "escape.h"
3ffd4af2 34#include "fd-util.h"
0d39fa9c 35#include "fileio.h"
f97b34a6 36#include "format-util.h"
f4f15635 37#include "fs-util.h"
7d50b32a 38#include "glob-util.h"
c004493c 39#include "io-util.h"
3f6fd1ba 40#include "label.h"
5008d581 41#include "log.h"
54693d9b 42#include "macro.h"
87938c3b 43#include "main-func.h"
d39efe74 44#include "missing.h"
49e942b2 45#include "mkdir.h"
049af8ad 46#include "mountpoint-util.h"
dcd5c891 47#include "pager.h"
6bedfcbb 48#include "parse-util.h"
f2b5ca0e 49#include "path-lookup.h"
9eb977db 50#include "path-util.h"
294bf0c3 51#include "pretty-print.h"
e5358401 52#include "rlimit-util.h"
c6878637 53#include "rm-rf.h"
d7b8eec7 54#include "selinux-util.h"
3f6fd1ba
LP		 55#include "set.h"
56#include "specifier.h"
8fcde012 57#include "stat-util.h"
15a5e950 58#include "stdio-util.h"
8b43440b 59#include "string-table.h"
07630cea 60#include "string-util.h"
3f6fd1ba 61#include "strv.h"
affb60b1 62#include "umask-util.h"
b1d4f8e1 63#include "user-util.h"
3f6fd1ba 64#include "util.h"
5008d581 65
01000479 66/* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
5008d581 67 * them in the file system. This is intended to be used to create
db019b8d
KS		 68 * properly owned directories beneath /tmp, /var/tmp, /run, which are
69 * volatile and hence need to be recreated on bootup. */
5008d581 70
1a967b6b
LP		 71typedef enum OperationMask {
72 OPERATION_CREATE = 1 << 0,
73 OPERATION_REMOVE = 1 << 1,
74 OPERATION_CLEAN = 1 << 2,
75} OperationMask;
76
66ccd038 77typedef enum ItemType {
b8bb3e8f 78 /* These ones take file names */
3b63d2d3
LP		 79 CREATE_FILE = 'f',
80 TRUNCATE_FILE = 'F',
81 CREATE_DIRECTORY = 'd',
82 TRUNCATE_DIRECTORY = 'D',
d7b8eec7 83 CREATE_SUBVOLUME = 'v',
5fb13eb5
LP		 84 CREATE_SUBVOLUME_INHERIT_QUOTA = 'q',
85 CREATE_SUBVOLUME_NEW_QUOTA = 'Q',
ee17ee7c 86 CREATE_FIFO = 'p',
468d726b
LP		 87 CREATE_SYMLINK = 'L',
88 CREATE_CHAR_DEVICE = 'c',
89 CREATE_BLOCK_DEVICE = 'b',
849958d1 90 COPY_FILES = 'C',
b8bb3e8f
LP		 91
92 /* These ones take globs */
17493fa5 93 WRITE_FILE = 'w',
df8dee85 94 EMPTY_DIRECTORY = 'e',
b705ab6a
ZJS		 95 SET_XATTR = 't',
96 RECURSIVE_SET_XATTR = 'T',
97 SET_ACL = 'a',
98 RECURSIVE_SET_ACL = 'A',
17493fa5
LP		 99 SET_ATTRIBUTE = 'h',
100 RECURSIVE_SET_ATTRIBUTE = 'H',
3b63d2d3 101 IGNORE_PATH = 'x',
78a92a5a 102 IGNORE_DIRECTORY_PATH = 'X',
3b63d2d3 103 REMOVE_PATH = 'r',
a8d88783 104 RECURSIVE_REMOVE_PATH = 'R',
777b87e7 105 RELABEL_PATH = 'z',
e73a03e0 106 RECURSIVE_RELABEL_PATH = 'Z',
17493fa5 107 ADJUST_MODE = 'm', /* legacy, 'z' is identical to this */
66ccd038 108} ItemType;
3b63d2d3
LP		 109
110typedef struct Item {
66ccd038 111 ItemType type;
3b63d2d3
LP		 112
113 char *path;
468d726b 114 char *argument;
ebf4e801 115 char **xattrs;
349cc4a5 116#if HAVE_ACL
f8eeeaf9
ZJS		 117 acl_t acl_access;
118 acl_t acl_default;
119#endif
5008d581
LP		 120 uid_t uid;
121 gid_t gid;
3b63d2d3
LP		 122 mode_t mode;
123 usec_t age;
124
468d726b 125 dev_t major_minor;
88ec4dfa
LP		 126 unsigned attribute_value;
127 unsigned attribute_mask;
468d726b 128
3b63d2d3
LP		 129 bool uid_set:1;
130 bool gid_set:1;
131 bool mode_set:1;
132 bool age_set:1;
abef3f91 133 bool mask_perms:1;
88ec4dfa 134 bool attribute_set:1;
24f3a374
LP		 135
136 bool keep_first_level:1;
1910cd0e 137
2e78fa79
LP		 138 bool force:1;
139
6d7b5433
WD		 140 bool allow_failure:1;
141
811a1587 142 OperationMask done;
3b63d2d3
LP		 143} Item;
144
3f93da98
ZJS		 145typedef struct ItemArray {
146 Item *items;
96d10d78 147 size_t n_items;
64768714 148 size_t allocated;
811a1587
LP		 149
150 struct ItemArray *parent;
151 Set *children;
3f93da98
ZJS		 152} ItemArray;
153
5a8575ef 154typedef enum DirectoryType {
133bbca4 155 DIRECTORY_RUNTIME,
5a8575ef
ZJS		 156 DIRECTORY_STATE,
157 DIRECTORY_CACHE,
158 DIRECTORY_LOGS,
159 _DIRECTORY_TYPE_MAX,
160} DirectoryType;
161
ceaaeb9b 162static bool arg_cat_config = false;
f2b5ca0e 163static bool arg_user = false;
1a967b6b 164static OperationMask arg_operation = 0;
81815651 165static bool arg_boot = false;
0221d68a 166static PagerFlags arg_pager_flags = 0;
3b63d2d3 167
7bc040fa
LP		 168static char **arg_include_prefixes = NULL;
169static char **arg_exclude_prefixes = NULL;
cf9a4abd 170static char *arg_root = NULL;
a6d8474f 171static char *arg_replace = NULL;
fba6e687 172
3b63d2d3
LP		 173#define MAX_DEPTH 256
174
ef43a391 175static OrderedHashmap *items = NULL, *globs = NULL;
7bc040fa
LP		 176static Set *unix_sockets = NULL;
177
87938c3b
YW		 178STATIC_DESTRUCTOR_REGISTER(items, ordered_hashmap_freep);
179STATIC_DESTRUCTOR_REGISTER(globs, ordered_hashmap_freep);
180STATIC_DESTRUCTOR_REGISTER(unix_sockets, set_free_freep);
181STATIC_DESTRUCTOR_REGISTER(arg_include_prefixes, freep);
182STATIC_DESTRUCTOR_REGISTER(arg_exclude_prefixes, freep);
183STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
184
303ee601
ZJS		 185static int specifier_machine_id_safe(char specifier, const void *data, const void *userdata, char **ret);
186static int specifier_directory(char specifier, const void *data, const void *userdata, char **ret);
4cef1923 187
bd550f78 188static const Specifier specifier_table[] = {
4cef1923 189 { 'm', specifier_machine_id_safe, NULL },
5a8575ef
ZJS		 190 { 'b', specifier_boot_id, NULL },
191 { 'H', specifier_host_name, NULL },
192 { 'v', specifier_kernel_release, NULL },
193
b75f0c69
DC		 194 { 'g', specifier_group_name, NULL },
195 { 'G', specifier_group_id, NULL },
5a8575ef
ZJS		 196 { 'U', specifier_user_id, NULL },
197 { 'u', specifier_user_name, NULL },
198 { 'h', specifier_user_home, NULL },
b294e594 199
5a8575ef
ZJS		 200 { 't', specifier_directory, UINT_TO_PTR(DIRECTORY_RUNTIME) },
201 { 'S', specifier_directory, UINT_TO_PTR(DIRECTORY_STATE) },
202 { 'C', specifier_directory, UINT_TO_PTR(DIRECTORY_CACHE) },
203 { 'L', specifier_directory, UINT_TO_PTR(DIRECTORY_LOGS) },
b294e594
LP		 204 { 'T', specifier_tmp_dir, NULL },
205 { 'V', specifier_var_tmp_dir, NULL },
bd550f78
LP		 206 {}
207};
208
303ee601 209static int specifier_machine_id_safe(char specifier, const void *data, const void *userdata, char **ret) {
4cef1923
FB		 210 int r;
211
d8dab757
FB		 212 /* If /etc/machine_id is missing or empty (e.g. in a chroot environment)
213 * return a recognizable error so that the caller can skip the rule
4cef1923
FB		 214 * gracefully. */
215
216 r = specifier_machine_id(specifier, data, userdata, ret);
d8dab757 217 if (IN_SET(r, -ENOENT, -ENOMEDIUM))
5a8575ef 218 return -ENXIO;
4cef1923
FB		 219
220 return r;
221}
222
303ee601 223static int specifier_directory(char specifier, const void *data, const void *userdata, char **ret) {
5a8575ef
ZJS		 224 struct table_entry {
225 uint64_t type;
226 const char *suffix;
227 };
228
229 static const struct table_entry paths_system[] = {
230 [DIRECTORY_RUNTIME] = { SD_PATH_SYSTEM_RUNTIME },
231 [DIRECTORY_STATE] = { SD_PATH_SYSTEM_STATE_PRIVATE },
232 [DIRECTORY_CACHE] = { SD_PATH_SYSTEM_STATE_CACHE },
233 [DIRECTORY_LOGS] = { SD_PATH_SYSTEM_STATE_LOGS },
234 };
235
236 static const struct table_entry paths_user[] = {
237 [DIRECTORY_RUNTIME] = { SD_PATH_USER_RUNTIME },
238 [DIRECTORY_STATE] = { SD_PATH_USER_CONFIGURATION },
239 [DIRECTORY_CACHE] = { SD_PATH_USER_STATE_CACHE },
240 [DIRECTORY_LOGS] = { SD_PATH_USER_CONFIGURATION, "log" },
241 };
242
243 unsigned i;
244 const struct table_entry *paths;
245
246 assert_cc(ELEMENTSOF(paths_system) == ELEMENTSOF(paths_user));
247 paths = arg_user ? paths_user : paths_system;
248
249 i = PTR_TO_UINT(data);
250 assert(i < ELEMENTSOF(paths_system));
251
252 return sd_path_home(paths[i].type, paths[i].suffix, ret);
253}
254
4cef1923
FB		 255static int log_unresolvable_specifier(const char *filename, unsigned line) {
256 static bool notified = false;
257
5a8575ef
ZJS		 258 /* In system mode, this is called when /etc is not fully initialized (e.g.
259 * in a chroot environment) where some specifiers are unresolvable. In user
260 * mode, this is called when some variables are not defined. These cases are
261 * not considered as an error so log at LOG_NOTICE only for the first time
262 * and then downgrade this to LOG_DEBUG for the rest. */
4cef1923
FB		 263
264 log_full(notified ? LOG_DEBUG : LOG_NOTICE,
5a8575ef
ZJS		 265 "[%s:%u] Failed to resolve specifier: %s, skipping",
266 filename, line,
267 arg_user ? "Required $XDG_... variable not defined" : "uninitialized /etc detected");
4cef1923
FB		 268
269 if (!notified)
270 log_notice("All rules containing unresolvable specifiers will be skipped.");
271
272 notified = true;
273 return 0;
274}
275
f2b5ca0e
ZJS		 276static int user_config_paths(char*** ret) {
277 _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
278 _cleanup_free_ char *persistent_config = NULL, *runtime_config = NULL, *data_home = NULL;
279 _cleanup_strv_free_ char **res = NULL;
280 int r;
281
282 r = xdg_user_dirs(&config_dirs, &data_dirs);
283 if (r < 0)
284 return r;
285
286 r = xdg_user_config_dir(&persistent_config, "/user-tmpfiles.d");
287 if (r < 0 && r != -ENXIO)
288 return r;
289
290 r = xdg_user_runtime_dir(&runtime_config, "/user-tmpfiles.d");
291 if (r < 0 && r != -ENXIO)
292 return r;
293
294 r = xdg_user_data_dir(&data_home, "/user-tmpfiles.d");
295 if (r < 0 && r != -ENXIO)
296 return r;
297
298 r = strv_extend_strv_concat(&res, config_dirs, "/user-tmpfiles.d");
299 if (r < 0)
300 return r;
301
302 r = strv_extend(&res, persistent_config);
303 if (r < 0)
304 return r;
305
306 r = strv_extend(&res, runtime_config);
307 if (r < 0)
308 return r;
309
310 r = strv_extend(&res, data_home);
311 if (r < 0)
312 return r;
313
314 r = strv_extend_strv_concat(&res, data_dirs, "/user-tmpfiles.d");
315 if (r < 0)
316 return r;
317
318 r = path_strv_make_absolute_cwd(res);
319 if (r < 0)
320 return r;
321
ae2a15bc 322 *ret = TAKE_PTR(res);
f2b5ca0e
ZJS		 323 return 0;
324}
325
66ccd038 326static bool needs_glob(ItemType t) {
cde684a2
LP		 327 return IN_SET(t,
328 WRITE_FILE,
329 IGNORE_PATH,
330 IGNORE_DIRECTORY_PATH,
331 REMOVE_PATH,
332 RECURSIVE_REMOVE_PATH,
df8dee85 333 EMPTY_DIRECTORY,
e73a03e0 334 ADJUST_MODE,
cde684a2 335 RELABEL_PATH,
b705ab6a
ZJS		 336 RECURSIVE_RELABEL_PATH,
337 SET_XATTR,
338 RECURSIVE_SET_XATTR,
339 SET_ACL,
34f64536
LP		 340 RECURSIVE_SET_ACL,
341 SET_ATTRIBUTE,
342 RECURSIVE_SET_ATTRIBUTE);
b8bb3e8f
LP		 343}
344
3f93da98
ZJS		 345static bool takes_ownership(ItemType t) {
346 return IN_SET(t,
347 CREATE_FILE,
348 TRUNCATE_FILE,
349 CREATE_DIRECTORY,
df8dee85 350 EMPTY_DIRECTORY,
3f93da98
ZJS		 351 TRUNCATE_DIRECTORY,
352 CREATE_SUBVOLUME,
5fb13eb5
LP		 353 CREATE_SUBVOLUME_INHERIT_QUOTA,
354 CREATE_SUBVOLUME_NEW_QUOTA,
3f93da98
ZJS		 355 CREATE_FIFO,
356 CREATE_SYMLINK,
357 CREATE_CHAR_DEVICE,
358 CREATE_BLOCK_DEVICE,
359 COPY_FILES,
3f93da98
ZJS		 360 WRITE_FILE,
361 IGNORE_PATH,
362 IGNORE_DIRECTORY_PATH,
363 REMOVE_PATH,
364 RECURSIVE_REMOVE_PATH);
365}
366
ef43a391 367static struct Item* find_glob(OrderedHashmap *h, const char *match) {
3f93da98 368 ItemArray *j;
b8bb3e8f
LP		 369 Iterator i;
370
ef43a391 371 ORDERED_HASHMAP_FOREACH(j, h, i) {
96d10d78 372 size_t n;
3f93da98 373
96d10d78 374 for (n = 0; n < j->n_items; n++) {
3f93da98
ZJS		 375 Item *item = j->items + n;
376
377 if (fnmatch(item->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
378 return item;
379 }
380 }
b8bb3e8f
LP		 381
382 return NULL;
383}
384
71a0be76
YW		 385static int load_unix_sockets(void) {
386 _cleanup_set_free_free_ Set *sockets = NULL;
7fd1b19b 387 _cleanup_fclose_ FILE *f = NULL;
f1ff734f 388 int r;
17b90525
LP		 389
390 if (unix_sockets)
71a0be76 391 return 0;
17b90525 392
f1ff734f 393 /* We maintain a cache of the sockets we found in /proc/net/unix to speed things up a little. */
17b90525 394
71a0be76
YW		 395 sockets = set_new(&path_hash_ops);
396 if (!sockets)
397 return log_oom();
17b90525 398
fdcad0c2 399 f = fopen("/proc/net/unix", "re");
71a0be76
YW		 400 if (!f)
401 return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno,
402 "Failed to open /proc/net/unix, ignoring: %m");
17b90525 403
fdcad0c2 404 /* Skip header */
f1ff734f 405 r = read_line(f, LONG_LINE_MAX, NULL);
71a0be76
YW		 406 if (r < 0)
407 return log_warning_errno(r, "Failed to skip /proc/net/unix header line: %m");
408 if (r == 0)
409 return log_warning_errno(SYNTHETIC_ERRNO(EIO), "Premature end of file reading /proc/net/unix.");
17b90525
LP		 410
411 for (;;) {
71a0be76
YW		 412 _cleanup_free_ char *line = NULL, *s = NULL;
413 char *p;
17b90525 414
f1ff734f 415 r = read_line(f, LONG_LINE_MAX, &line);
71a0be76
YW		 416 if (r < 0)
417 return log_warning_errno(r, "Failed to read /proc/net/unix line, ignoring: %m");
f1ff734f 418 if (r == 0) /* EOF */
17b90525
LP		 419 break;
420
fdcad0c2
LP		 421 p = strchr(line, ':');
422 if (!p)
423 continue;
424
425 if (strlen(p) < 37)
17b90525
LP		 426 continue;
427
fdcad0c2 428 p += 37;
17b90525 429 p += strspn(p, WHITESPACE);
fdcad0c2 430 p += strcspn(p, WHITESPACE); /* skip one more word */
17b90525
LP		 431 p += strspn(p, WHITESPACE);
432
433 if (*p != '/')
434 continue;
435
fdcad0c2 436 s = strdup(p);
71a0be76
YW		 437 if (!s)
438 return log_oom();
17b90525 439
858d36c1 440 path_simplify(s, false);
4ff21d85 441
71a0be76
YW		 442 r = set_consume(sockets, s);
443 if (r == -EEXIST)
444 continue;
445 if (r < 0)
446 return log_warning_errno(r, "Failed to add AF_UNIX socket to set, ignoring: %m");
17b90525 447
71a0be76
YW		 448 TAKE_PTR(s);
449 }
17b90525 450
71a0be76
YW		 451 unix_sockets = TAKE_PTR(sockets);
452 return 1;
17b90525
LP		 453}
454
455static bool unix_socket_alive(const char *fn) {
456 assert(fn);
457
71a0be76
YW		 458 if (load_unix_sockets() < 0)
459 return true; /* We don't know, so assume yes */
17b90525 460
71a0be76 461 return !!set_get(unix_sockets, (char*) fn);
17b90525
LP		 462}
463
99d680ac 464static int dir_is_mount_point(DIR *d, const char *subdir) {
cde684a2 465
99d680ac
KS		 466 int mount_id_parent, mount_id;
467 int r_p, r;
468
cbfb8679 469 r_p = name_to_handle_at_loop(dirfd(d), ".", NULL, &mount_id_parent, 0);
99d680ac
KS		 470 if (r_p < 0)
471 r_p = -errno;
472
cbfb8679 473 r = name_to_handle_at_loop(dirfd(d), subdir, NULL, &mount_id, 0);
99d680ac
KS		 474 if (r < 0)
475 r = -errno;
476
477 /* got no handle; make no assumptions, return error */
478 if (r_p < 0 && r < 0)
479 return r_p;
480
481 /* got both handles; if they differ, it is a mount point */
482 if (r_p >= 0 && r >= 0)
483 return mount_id_parent != mount_id;
484
485 /* got only one handle; assume different mount points if one
486 * of both queries was not supported by the filesystem */
4c701096 487 if (IN_SET(r_p, -ENOSYS, -EOPNOTSUPP) || IN_SET(r, -ENOSYS, -EOPNOTSUPP))
99d680ac
KS		 488 return true;
489
490 /* return error */
491 if (r_p < 0)
492 return r_p;
493 return r;
494}
495
df99a9ef
ZJS		 496static DIR* xopendirat_nomod(int dirfd, const char *path) {
497 DIR *dir;
498
499 dir = xopendirat(dirfd, path, O_NOFOLLOW|O_NOATIME);
1532227a
LP		 500 if (dir)
501 return dir;
502
503 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
504 if (errno != EPERM)
505 return NULL;
506
507 dir = xopendirat(dirfd, path, O_NOFOLLOW);
508 if (!dir)
509 log_debug_errno(errno, "Cannot open %sdirectory \"%s\": %m", dirfd == AT_FDCWD ? "" : "sub", path);
df99a9ef
ZJS		 510
511 return dir;
512}
513
514static DIR* opendir_nomod(const char *path) {
515 return xopendirat_nomod(AT_FDCWD, path);
516}
517
3b63d2d3 518static int dir_cleanup(
78a92a5a 519 Item *i,
3b63d2d3
LP		 520 const char *p,
521 DIR *d,
522 const struct stat *ds,
523 usec_t cutoff,
524 dev_t rootdev,
525 bool mountpoint,
24f3a374 526 int maxdepth,
265ffa1e
LP		 527 bool keep_this_level) {
528
3b63d2d3 529 struct dirent *dent;
3b63d2d3 530 bool deleted = false;
3b63d2d3
LP		 531 int r = 0;
532
8fb3f009 533 FOREACH_DIRENT_ALL(dent, d, break) {
3b63d2d3
LP		 534 struct stat s;
535 usec_t age;
7fd1b19b 536 _cleanup_free_ char *sub_path = NULL;
3b63d2d3 537
49bfc877 538 if (dot_or_dot_dot(dent->d_name))
3b63d2d3 539 continue;
5008d581 540
3b63d2d3 541 if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
ca2f4176
KS		 542 if (errno == ENOENT)
543 continue;
5008d581 544
ca2f4176 545 /* FUSE, NFS mounts, SELinux might return EACCES */
ecc1709c
LP		 546 r = log_full_errno(errno == EACCES ? LOG_DEBUG : LOG_ERR, errno,
547 "stat(%s/%s) failed: %m", p, dent->d_name);
3b63d2d3
LP		 548 continue;
549 }
550
551 /* Stay on the same filesystem */
582deb84
ZJS		 552 if (s.st_dev != rootdev) {
553 log_debug("Ignoring \"%s/%s\": different filesystem.", p, dent->d_name);
3b63d2d3 554 continue;
582deb84 555 }
3b63d2d3 556
99d680ac
KS		 557 /* Try to detect bind mounts of the same filesystem instance; they
558 * do not differ in device major/minors. This type of query is not
559 * supported on all kernels or filesystem types though. */
582deb84
ZJS		 560 if (S_ISDIR(s.st_mode) && dir_is_mount_point(d, dent->d_name) > 0) {
561 log_debug("Ignoring \"%s/%s\": different mount of the same filesystem.",
562 p, dent->d_name);
99d680ac 563 continue;
582deb84 564 }
99d680ac 565
605405c6 566 sub_path = strjoin(p, "/", dent->d_name);
cde684a2 567 if (!sub_path) {
0d0f0c50 568 r = log_oom();
3b63d2d3
LP		 569 goto finish;
570 }
571
572 /* Is there an item configured for this path? */
ef43a391 573 if (ordered_hashmap_get(items, sub_path)) {
582deb84 574 log_debug("Ignoring \"%s\": a separate entry exists.", sub_path);
3b63d2d3 575 continue;
582deb84 576 }
3b63d2d3 577
582deb84
ZJS		 578 if (find_glob(globs, sub_path)) {
579 log_debug("Ignoring \"%s\": a separate glob exists.", sub_path);
b8bb3e8f 580 continue;
582deb84 581 }
b8bb3e8f 582
3b63d2d3 583 if (S_ISDIR(s.st_mode)) {
52b32b2a 584 _cleanup_closedir_ DIR *sub_dir = NULL;
3b63d2d3
LP		 585
586 if (mountpoint &&
587 streq(dent->d_name, "lost+found") &&
582deb84 588 s.st_uid == 0) {
781bc44e 589 log_debug("Ignoring directory \"%s\".", sub_path);
3b63d2d3 590 continue;
582deb84 591 }
3b63d2d3
LP		 592
593 if (maxdepth <= 0)
582deb84 594 log_warning("Reached max depth on \"%s\".", sub_path);
3b63d2d3 595 else {
3b63d2d3
LP		 596 int q;
597
df99a9ef 598 sub_dir = xopendirat_nomod(dirfd(d), dent->d_name);
cde684a2 599 if (!sub_dir) {
582deb84 600 if (errno != ENOENT)
781bc44e 601 r = log_warning_errno(errno, "Opening directory \"%s\" failed, ignoring: %m", sub_path);
3b63d2d3
LP		 602
603 continue;
604 }
605
52b32b2a
LP		 606 if (flock(dirfd(sub_dir), LOCK_EX|LOCK_NB) < 0) {
607 log_debug_errno(errno, "Couldn't acquire shared BSD lock on directory \"%s\", skipping: %m", p);
608 continue;
609 }
610
78a92a5a 611 q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);
3b63d2d3
LP		 612 if (q < 0)
613 r = q;
614 }
615
a23fabc6
LP		 616 /* Note: if you are wondering why we don't support the sticky bit for excluding
617 * directories from cleaning like we do it for other file system objects: well, the
618 * sticky bit already has a meaning for directories, so we don't want to overload
619 * that. */
24f3a374 620
582deb84 621 if (keep_this_level) {
781bc44e 622 log_debug("Keeping directory \"%s\".", sub_path);
24f3a374 623 continue;
582deb84 624 }
24f3a374 625
3b63d2d3 626 /* Ignore ctime, we change it when deleting */
582deb84
ZJS		 627 age = timespec_load(&s.st_mtim);
628 if (age >= cutoff) {
629 char a[FORMAT_TIMESTAMP_MAX];
630 /* Follows spelling in stat(1). */
631 log_debug("Directory \"%s\": modify time %s is too new.",
632 sub_path,
633 format_timestamp_us(a, sizeof(a), age));
3b63d2d3 634 continue;
582deb84
ZJS		 635 }
636
637 age = timespec_load(&s.st_atim);
638 if (age >= cutoff) {
639 char a[FORMAT_TIMESTAMP_MAX];
640 log_debug("Directory \"%s\": access time %s is too new.",
641 sub_path,
642 format_timestamp_us(a, sizeof(a), age));
643 continue;
644 }
3b63d2d3 645
61253220
ZJS		 646 log_debug("Removing directory \"%s\".", sub_path);
647 if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0)
920ce828 648 if (!IN_SET(errno, ENOENT, ENOTEMPTY))
781bc44e 649 r = log_warning_errno(errno, "Failed to remove directory \"%s\", ignoring: %m", sub_path);
3b63d2d3
LP		 650
651 } else {
a23fabc6
LP		 652 /* Skip files for which the sticky bit is set. These are semantics we define, and are
653 * unknown elsewhere. See XDG_RUNTIME_DIR specification for details. */
582deb84
ZJS		 654 if (s.st_mode & S_ISVTX) {
655 log_debug("Skipping \"%s\": sticky bit set.", sub_path);
9c73736d 656 continue;
582deb84 657 }
9c73736d 658
582deb84 659 if (mountpoint && S_ISREG(s.st_mode))
1542c01b
ZJS		 660 if (s.st_uid == 0 && STR_IN_SET(dent->d_name,
661 ".journal",
662 "aquota.user",
663 "aquota.group")) {
582deb84 664 log_debug("Skipping \"%s\".", sub_path);
3b63d2d3 665 continue;
582deb84 666 }
3b63d2d3 667
17b90525 668 /* Ignore sockets that are listed in /proc/net/unix */
582deb84
ZJS		 669 if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) {
670 log_debug("Skipping \"%s\": live socket.", sub_path);
17b90525 671 continue;
582deb84 672 }
17b90525 673
78ab08eb 674 /* Ignore device nodes */
582deb84
ZJS		 675 if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) {
676 log_debug("Skipping \"%s\": a device.", sub_path);
78ab08eb 677 continue;
582deb84 678 }
78ab08eb 679
a23fabc6 680 /* Keep files on this level around if this is requested */
582deb84
ZJS		 681 if (keep_this_level) {
682 log_debug("Keeping \"%s\".", sub_path);
24f3a374 683 continue;
582deb84 684 }
24f3a374 685
582deb84
ZJS		 686 age = timespec_load(&s.st_mtim);
687 if (age >= cutoff) {
688 char a[FORMAT_TIMESTAMP_MAX];
689 /* Follows spelling in stat(1). */
690 log_debug("File \"%s\": modify time %s is too new.",
691 sub_path,
692 format_timestamp_us(a, sizeof(a), age));
3b63d2d3 693 continue;
582deb84 694 }
3b63d2d3 695
582deb84
ZJS		 696 age = timespec_load(&s.st_atim);
697 if (age >= cutoff) {
698 char a[FORMAT_TIMESTAMP_MAX];
699 log_debug("File \"%s\": access time %s is too new.",
700 sub_path,
701 format_timestamp_us(a, sizeof(a), age));
702 continue;
703 }
3b63d2d3 704
582deb84
ZJS		 705 age = timespec_load(&s.st_ctim);
706 if (age >= cutoff) {
707 char a[FORMAT_TIMESTAMP_MAX];
708 log_debug("File \"%s\": change time %s is too new.",
709 sub_path,
710 format_timestamp_us(a, sizeof(a), age));
711 continue;
3b63d2d3
LP		 712 }
713
781bc44e 714 log_debug("Removing \"%s\".", sub_path);
582deb84
ZJS		 715 if (unlinkat(dirfd(d), dent->d_name, 0) < 0)
716 if (errno != ENOENT)
781bc44e 717 r = log_warning_errno(errno, "Failed to remove \"%s\", ignoring: %m", sub_path);
582deb84 718
3b63d2d3
LP		 719 deleted = true;
720 }
721 }
722
723finish:
724 if (deleted) {
582deb84 725 char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX];
76e15a9c 726 usec_t age1, age2;
3b63d2d3 727
582deb84
ZJS		 728 age1 = timespec_load(&ds->st_atim);
729 age2 = timespec_load(&ds->st_mtim);
76e15a9c 730
582deb84
ZJS		 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));
76e15a9c
LP		 735
736 /* Restore original directory timestamps */
737 if (futimens(dirfd(d), (struct timespec[]) {
738 ds->st_atim,
739 ds->st_mtim }) < 0)
740 log_warning_errno(errno, "Failed to revert timestamps of '%s', ignoring: %m", p);
3b63d2d3
LP		 741 }
742
3b63d2d3
LP		 743 return r;
744}
745
5579f856
LP		 746static bool dangerous_hardlinks(void) {
747 _cleanup_free_ char *value = NULL;
748 static int cached = -1;
749 int r;
750
751 /* Check whether the fs.protected_hardlinks sysctl is on. If we can't determine it we assume its off, as that's
752 * what the upstream default is. */
753
754 if (cached >= 0)
755 return cached;
756
757 r = read_one_line_file("/proc/sys/fs/protected_hardlinks", &value);
758 if (r < 0) {
759 log_debug_errno(r, "Failed to read fs.protected_hardlinks sysctl: %m");
760 return true;
761 }
762
763 r = parse_boolean(value);
764 if (r < 0) {
765 log_debug_errno(r, "Failed to parse fs.protected_hardlinks sysctl: %m");
766 return true;
767 }
768
769 cached = r == 0;
770 return cached;
771}
772
774f79b5 773static bool hardlink_vulnerable(const struct stat *st) {
5579f856
LP		 774 assert(st);
775
776 return !S_ISDIR(st->st_mode) && st->st_nlink > 1 && dangerous_hardlinks();
777}
778
9d874aec 779static int fd_set_perms(Item *i, int fd, const char *path, const struct stat *st) {
b206ac8e 780 struct stat stbuf;
1924a97d 781
cde684a2 782 assert(i);
936f6bdb 783 assert(fd);
4dc7bfdf 784 assert(path);
48b8aaa8 785
936f6bdb
FB		 786 if (!i->mode_set && !i->uid_set && !i->gid_set)
787 goto shortcut;
1924a97d 788
b206ac8e
FB		 789 if (!st) {
790 if (fstat(fd, &stbuf) < 0)
791 return log_error_errno(errno, "fstat(%s) failed: %m", path);
792 st = &stbuf;
793 }
794
baaa35ad
ZJS		 795 if (hardlink_vulnerable(st))
796 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
797 "Refusing to set permissions on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.",
798 path);
5579f856 799
51207ca1 800 if (i->mode_set) {
936f6bdb 801 if (S_ISLNK(st->st_mode))
51207ca1
LP		 802 log_debug("Skipping mode fix for symlink %s.", path);
803 else {
48b8aaa8
LP		 804 mode_t m = i->mode;
805
806 if (i->mask_perms) {
936f6bdb 807 if (!(st->st_mode & 0111))
48b8aaa8 808 m &= ~0111;
936f6bdb 809 if (!(st->st_mode & 0222))
7d6884b6 810 m &= ~0222;
936f6bdb 811 if (!(st->st_mode & 0444))
48b8aaa8 812 m &= ~0444;
936f6bdb 813 if (!S_ISDIR(st->st_mode))
48b8aaa8
LP		 814 m &= ~07000; /* remove sticky/sgid/suid bit, unless directory */
815 }
abef3f91 816
936f6bdb
FB		 817 if (m == (st->st_mode & 07777))
818 log_debug("\"%s\" has correct mode %o already.", path, st->st_mode);
48b8aaa8 819 else {
51207ca1 820 log_debug("Changing \"%s\" to mode %o.", path, m);
4dfaa528
FB		 821 if (fchmod_opath(fd, m) < 0)
822 return log_error_errno(errno, "fchmod() of %s failed: %m", path);
48b8aaa8 823 }
062e01bb 824 }
51207ca1 825 }
062e01bb 826
936f6bdb
FB		 827 if ((i->uid_set && i->uid != st->st_uid) ||
828 (i->gid_set && i->gid != st->st_gid)) {
51207ca1
LP		 829 log_debug("Changing \"%s\" to owner "UID_FMT":"GID_FMT,
830 path,
831 i->uid_set ? i->uid : UID_INVALID,
832 i->gid_set ? i->gid : GID_INVALID);
833
936f6bdb
FB		 834 if (fchownat(fd,
835 "",
836 i->uid_set ? i->uid : UID_INVALID,
837 i->gid_set ? i->gid : GID_INVALID,
838 AT_EMPTY_PATH) < 0)
839 return log_error_errno(errno, "fchownat() of %s failed: %m", path);
582deb84 840 }
062e01bb 841
59793c8f 842shortcut:
08c84981 843 return label_fix(path, 0);
062e01bb
MS		 844}
845
5ec9d065
FB		 846static int path_open_parent_safe(const char *path) {
847 _cleanup_free_ char *dn = NULL;
848 int fd;
849
baaa35ad
ZJS		 850 if (path_equal(path, "/") || !path_is_normalized(path))
851 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
852 "Failed to open parent of '%s': invalid path.",
853 path);
5ec9d065
FB		 854
855 dn = dirname_malloc(path);
856 if (!dn)
857 return log_oom();
858
7f0704da
FB		 859 fd = chase_symlinks(dn, NULL, CHASE_OPEN|CHASE_SAFE|CHASE_WARN, NULL);
860 if (fd < 0 && fd != -ENOLINK)
5ec9d065
FB		 861 return log_error_errno(fd, "Failed to validate path %s: %m", path);
862
863 return fd;
864}
865
addc3e30
FB		 866static int path_open_safe(const char *path) {
867 int fd;
868
869 /* path_open_safe() returns a file descriptor opened with O_PATH after
870 * verifying that the path doesn't contain unsafe transitions, except
871 * for its final component as the function does not follow symlink. */
872
873 assert(path);
874
baaa35ad
ZJS		 875 if (!path_is_normalized(path))
876 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
877 "Failed to open invalid path '%s'.",
878 path);
addc3e30 879
7f0704da
FB		 880 fd = chase_symlinks(path, NULL, CHASE_OPEN|CHASE_SAFE|CHASE_WARN|CHASE_NOFOLLOW, NULL);
881 if (fd < 0 && fd != -ENOLINK)
addc3e30
FB		 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 982#else
886cf317 983 log_warning_errno(SYNTHETIC_ERRNO(ENOSYS), "ACLs are not supported. Ignoring");
f8eeeaf9
ZJS		 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
baaa35ad
ZJS		 1051 if (hardlink_vulnerable(st))
1052 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
1053 "Refusing to set ACLs on hardlinked file %s while the fs.protected_hardlinks sysctl is turned off.",
1054 path);
5579f856 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
baaa35ad
ZJS		 1162 if (isempty(p) && mode != MODE_SET)
1163 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1164 "Setting file attribute on '%s' needs an attribute specification.",
1165 item->path);
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
baaa35ad
ZJS		 1174 if (i >= ELEMENTSOF(attributes))
1175 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1176 "Unknown file attribute '%c' on '%s'.",
1177 *p, item->path);
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. */
baaa35ad
ZJS		 1220 if (!S_ISREG(st->st_mode) && !S_ISDIR(st->st_mode))
1221 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1222 "Setting file flags is only supported on regular files and directories, cannot set on '%s'.",
1223 path);
88ec4dfa
LP		 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,
a6f44645 1467 COPY_REFLINK | COPY_MERGE_EMPTY);
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);
baaa35ad
ZJS		 1651 if (r == 0)
1652 return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
1653 "'%s' already exists and is not a directory.",
1654 path);
54946021
FB		 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
62a85ee0 1838 de_path = path_join(path, de->d_name);
4dc7bfdf
FB		 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
3b63d2d3 2132 case RECURSIVE_REMOVE_PATH:
2c575977 2133 /* FIXME: we probably should use dir_cleanup() here instead of rm_rf() so that 'x' is honoured. */
582deb84 2134 log_debug("rm -rf \"%s\"", instance);
2c575977 2135 r = rm_rf(instance, REMOVE_ROOT|REMOVE_SUBVOLUME|REMOVE_PHYSICAL);
f647962d
MS		 2136 if (r < 0 && r != -ENOENT)
2137 return log_error_errno(r, "rm_rf(%s): %m", instance);
3b63d2d3
LP		 2138
2139 break;
7fcb4b9b
ZJS		 2140
2141 default:
2142 assert_not_reached("wut?");
3b63d2d3
LP		 2143 }
2144
2145 return 0;
2146}
2147
a0896123 2148static int remove_item(Item *i) {
2c575977
LP		 2149 int r;
2150
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 2157 case TRUNCATE_DIRECTORY:
2c575977
LP		 2158 /* FIXME: we probably should use dir_cleanup() here instead of rm_rf() so that 'x' is honoured. */
2159 log_debug("rm -rf \"%s\"", i->path);
2160 r = rm_rf(i->path, REMOVE_PHYSICAL);
2161 if (r < 0 && r != -ENOENT)
2162 return log_error_errno(r, "rm_rf(%s): %m", i->path);
2163
2164 return 0;
2165
2166 case REMOVE_PATH:
99e68c0b 2167 case RECURSIVE_REMOVE_PATH:
936f6bdb 2168 return glob_item(i, remove_item_instance);
b8bb3e8f 2169
df8dee85
ZJS		 2170 default:
2171 return 0;
2172 }
b8bb3e8f
LP		 2173}
2174
78a92a5a 2175static int clean_item_instance(Item *i, const char* instance) {
7fd1b19b 2176 _cleanup_closedir_ DIR *d = NULL;
78a92a5a
MS		 2177 struct stat s, ps;
2178 bool mountpoint;
78a92a5a 2179 usec_t cutoff, n;
582deb84 2180 char timestamp[FORMAT_TIMESTAMP_MAX];
78a92a5a
MS		 2181
2182 assert(i);
2183
2184 if (!i->age_set)
2185 return 0;
2186
2187 n = now(CLOCK_REALTIME);
2188 if (n < i->age)
2189 return 0;
2190
2191 cutoff = n - i->age;
2192
df99a9ef 2193 d = opendir_nomod(instance);
78a92a5a 2194 if (!d) {
d710aaf7 2195 if (IN_SET(errno, ENOENT, ENOTDIR)) {
582deb84 2196 log_debug_errno(errno, "Directory \"%s\": %m", instance);
78a92a5a 2197 return 0;
582deb84 2198 }
78a92a5a 2199
d710aaf7 2200 return log_error_errno(errno, "Failed to open directory %s: %m", instance);
78a92a5a
MS		 2201 }
2202
4a62c710
MS		 2203 if (fstat(dirfd(d), &s) < 0)
2204 return log_error_errno(errno, "stat(%s) failed: %m", i->path);
78a92a5a 2205
baaa35ad
ZJS		 2206 if (!S_ISDIR(s.st_mode))
2207 return log_error_errno(SYNTHETIC_ERRNO(ENOTDIR),
2208 "%s is not a directory.", i->path);
78a92a5a 2209
4a62c710
MS		 2210 if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0)
2211 return log_error_errno(errno, "stat(%s/..) failed: %m", i->path);
78a92a5a 2212
2bb158c1 2213 mountpoint = s.st_dev != ps.st_dev || s.st_ino == ps.st_ino;
78a92a5a 2214
582deb84
ZJS		 2215 log_debug("Cleanup threshold for %s \"%s\" is %s",
2216 mountpoint ? "mount point" : "directory",
2217 instance,
2218 format_timestamp_us(timestamp, sizeof(timestamp), cutoff));
2219
2220 return dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint,
2221 MAX_DEPTH, i->keep_first_level);
78a92a5a
MS		 2222}
2223
2224static int clean_item(Item *i) {
78a92a5a
MS		 2225 assert(i);
2226
582deb84
ZJS		 2227 log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
2228
78a92a5a
MS		 2229 switch (i->type) {
2230 case CREATE_DIRECTORY:
d7b8eec7 2231 case CREATE_SUBVOLUME:
5fb13eb5
LP		 2232 case CREATE_SUBVOLUME_INHERIT_QUOTA:
2233 case CREATE_SUBVOLUME_NEW_QUOTA:
78a92a5a
MS		 2234 case TRUNCATE_DIRECTORY:
2235 case IGNORE_PATH:
849958d1 2236 case COPY_FILES:
78a92a5a 2237 clean_item_instance(i, i->path);
df8dee85 2238 return 0;
65241c14 2239 case EMPTY_DIRECTORY:
78a92a5a 2240 case IGNORE_DIRECTORY_PATH:
936f6bdb 2241 return glob_item(i, clean_item_instance);
78a92a5a 2242 default:
df8dee85 2243 return 0;
78a92a5a 2244 }
78a92a5a
MS		 2245}
2246
599ebe29 2247static int process_item(Item *i, OperationMask operation) {
811a1587
LP		 2248 OperationMask todo;
2249 int r, q, p;
3b63d2d3
LP		 2250
2251 assert(i);
2252
811a1587
LP		 2253 todo = operation & ~i->done;
2254 if (todo == 0) /* Everything already done? */
1910cd0e
LP		 2255 return 0;
2256
811a1587 2257 i->done |= operation;
1910cd0e 2258
145b8d0f 2259 r = chase_symlinks(i->path, NULL, CHASE_NO_AUTOFS|CHASE_WARN, NULL);
21af3386 2260 if (r == -EREMOTE) {
145b8d0f 2261 log_notice_errno(r, "Skipping %s", i->path);
811a1587 2262 return 0;
145b8d0f
FB		 2263 }
2264 if (r < 0)
48d96904 2265 log_debug_errno(r, "Failed to determine whether '%s' is below autofs, ignoring: %m", i->path);
655f2da0 2266
599ebe29 2267 r = FLAGS_SET(operation, OPERATION_CREATE) ? create_item(i) : 0;
6d7b5433
WD		 2268 /* Failure can only be tolerated for create */
2269 if (i->allow_failure)
2270 r = 0;
3b63d2d3 2271
599ebe29
LP		 2272 q = FLAGS_SET(operation, OPERATION_REMOVE) ? remove_item(i) : 0;
2273 p = FLAGS_SET(operation, OPERATION_CLEAN) ? clean_item(i) : 0;
1a967b6b 2274
811a1587 2275 return r < 0 ? r :
1db50423
ZJS		 2276 q < 0 ? q :
2277 p;
3b63d2d3
LP		 2278}
2279
599ebe29 2280static int process_item_array(ItemArray *array, OperationMask operation) {
96d10d78
LP		 2281 int r = 0;
2282 size_t n;
753615e8 2283
3f93da98
ZJS		 2284 assert(array);
2285
811a1587
LP		 2286 /* Create any parent first. */
2287 if (FLAGS_SET(operation, OPERATION_CREATE) && array->parent)
2288 r = process_item_array(array->parent, operation & OPERATION_CREATE);
2289
2290 /* Clean up all children first */
2291 if ((operation & (OPERATION_REMOVE|OPERATION_CLEAN)) && !set_isempty(array->children)) {
2292 Iterator i;
2293 ItemArray *c;
2294
2295 SET_FOREACH(c, array->children, i) {
2296 int k;
2297
2298 k = process_item_array(c, operation & (OPERATION_REMOVE|OPERATION_CLEAN));
2299 if (k < 0 && r == 0)
2300 r = k;
2301 }
2302 }
2303
96d10d78
LP		 2304 for (n = 0; n < array->n_items; n++) {
2305 int k;
2306
599ebe29 2307 k = process_item(array->items + n, operation);
3f93da98
ZJS		 2308 if (k < 0 && r == 0)
2309 r = k;
2310 }
2311
2312 return r;
2313}
3b63d2d3 2314
3f93da98
ZJS		 2315static void item_free_contents(Item *i) {
2316 assert(i);
3b63d2d3 2317 free(i->path);
468d726b 2318 free(i->argument);
ebf4e801 2319 strv_free(i->xattrs);
f8eeeaf9 2320
349cc4a5 2321#if HAVE_ACL
f8eeeaf9
ZJS		 2322 acl_free(i->acl_access);
2323 acl_free(i->acl_default);
2324#endif
3b63d2d3
LP		 2325}
2326
87938c3b 2327static ItemArray* item_array_free(ItemArray *a) {
96d10d78 2328 size_t n;
3f93da98
ZJS		 2329
2330 if (!a)
87938c3b 2331 return NULL;
3f93da98 2332
96d10d78 2333 for (n = 0; n < a->n_items; n++)
3f93da98 2334 item_free_contents(a->items + n);
96d10d78 2335
811a1587 2336 set_free(a->children);
3f93da98 2337 free(a->items);
87938c3b 2338 return mfree(a);
3f93da98 2339}
e2f2fb78 2340
93bab288 2341static int item_compare(const Item *a, const Item *b) {
17493fa5
LP		 2342 /* Make sure that the ownership taking item is put first, so
2343 * that we first create the node, and then can adjust it */
2344
93bab288 2345 if (takes_ownership(a->type) && !takes_ownership(b->type))
17493fa5 2346 return -1;
93bab288 2347 if (!takes_ownership(a->type) && takes_ownership(b->type))
17493fa5
LP		 2348 return 1;
2349
93bab288 2350 return CMP(a->type, b->type);
17493fa5
LP		 2351}
2352
3f93da98 2353static bool item_compatible(Item *a, Item *b) {
bfe95f35
LP		 2354 assert(a);
2355 assert(b);
3f93da98 2356 assert(streq(a->path, b->path));
bfe95f35 2357
3f93da98
ZJS		 2358 if (takes_ownership(a->type) && takes_ownership(b->type))
2359 /* check if the items are the same */
2360 return streq_ptr(a->argument, b->argument) &&
bfe95f35 2361
3f93da98
ZJS		 2362 a->uid_set == b->uid_set &&
2363 a->uid == b->uid &&
bfe95f35 2364
3f93da98
ZJS		 2365 a->gid_set == b->gid_set &&
2366 a->gid == b->gid &&
bfe95f35 2367
3f93da98
ZJS		 2368 a->mode_set == b->mode_set &&
2369 a->mode == b->mode &&
bfe95f35 2370
3f93da98
ZJS		 2371 a->age_set == b->age_set &&
2372 a->age == b->age &&
bfe95f35 2373
3f93da98 2374 a->mask_perms == b->mask_perms &&
bfe95f35 2375
3f93da98 2376 a->keep_first_level == b->keep_first_level &&
468d726b 2377
3f93da98 2378 a->major_minor == b->major_minor;
468d726b 2379
bfe95f35
LP		 2380 return true;
2381}
2382
a2aced4a
DR		 2383static bool should_include_path(const char *path) {
2384 char **prefix;
2385
abef3f91 2386 STRV_FOREACH(prefix, arg_exclude_prefixes)
582deb84
ZJS		 2387 if (path_startswith(path, *prefix)) {
2388 log_debug("Entry \"%s\" matches exclude prefix \"%s\", skipping.",
2389 path, *prefix);
5c795114 2390 return false;
582deb84 2391 }
a2aced4a 2392
abef3f91 2393 STRV_FOREACH(prefix, arg_include_prefixes)
582deb84
ZJS		 2394 if (path_startswith(path, *prefix)) {
2395 log_debug("Entry \"%s\" matches include prefix \"%s\".", path, *prefix);
a2aced4a 2396 return true;
582deb84 2397 }
a2aced4a 2398
5c795114
DR		 2399 /* no matches, so we should include this path only if we
2400 * have no whitelist at all */
7b943bb7 2401 if (strv_isempty(arg_include_prefixes))
582deb84
ZJS		 2402 return true;
2403
2404 log_debug("Entry \"%s\" does not match any include prefix, skipping.", path);
2405 return false;
a2aced4a
DR		 2406}
2407
4cef1923
FB		 2408static int specifier_expansion_from_arg(Item *i) {
2409 _cleanup_free_ char *unescaped = NULL, *resolved = NULL;
2410 char **xattr;
2411 int r;
2412
2413 assert(i);
2414
2415 if (i->argument == NULL)
2416 return 0;
2417
2418 switch (i->type) {
2419 case COPY_FILES:
2420 case CREATE_SYMLINK:
2421 case CREATE_FILE:
2422 case TRUNCATE_FILE:
2423 case WRITE_FILE:
2424 r = cunescape(i->argument, 0, &unescaped);
2425 if (r < 0)
2426 return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);
2427
2428 r = specifier_printf(unescaped, specifier_table, NULL, &resolved);
2429 if (r < 0)
2430 return r;
2431
2432 free_and_replace(i->argument, resolved);
2433 break;
2434
2435 case SET_XATTR:
2436 case RECURSIVE_SET_XATTR:
2437 assert(i->xattrs);
2438
2439 STRV_FOREACH (xattr, i->xattrs) {
2440 r = specifier_printf(*xattr, specifier_table, NULL, &resolved);
2441 if (r < 0)
2442 return r;
2443
2444 free_and_replace(*xattr, resolved);
2445 }
2446 break;
2447
2448 default:
2449 break;
2450 }
2451 return 0;
2452}
2453
a2d1fb88
LP		 2454static int patch_var_run(const char *fname, unsigned line, char **path) {
2455 const char *k;
2456 char *n;
2457
2458 assert(path);
2459 assert(*path);
2460
2461 /* Optionally rewrites lines referencing /var/run/, to use /run/ instead. Why bother? tmpfiles merges lines in
2462 * some cases and detects conflicts in others. If files/directories are specified through two equivalent lines
2463 * this is problematic as neither case will be detected. Ideally we'd detect these cases by resolving symlinks
2464 * early, but that's precisely not what we can do here as this code very likely is running very early on, at a
2465 * time where the paths in question are not available yet, or even more importantly, our own tmpfiles rules
2466 * might create the paths that are intermediary to the listed paths. We can't really cover the generic case,
2467 * but the least we can do is cover the specific case of /var/run vs. /run, as /var/run is a legacy name for
2468 * /run only, and we explicitly document that and require that on systemd systems the former is a symlink to
2469 * the latter. Moreover files below this path are by far the primary usecase for tmpfiles.d/. */
2470
2471 k = path_startswith(*path, "/var/run/");
2472 if (isempty(k)) /* Don't complain about other paths than /var/run, and not about /var/run itself either. */
2473 return 0;
2474
2475 n = strjoin("/run/", k);
2476 if (!n)
2477 return log_oom();
2478
2479 /* Also log about this briefly. We do so at LOG_NOTICE level, as we fixed up the situation automatically, hence
2480 * there's no immediate need for action by the user. However, in the interest of making things less confusing
2481 * to the user, let's still inform the user that these snippets should really be updated. */
2482
2483 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);
2484
81fa4479 2485 free_and_replace(*path, n);
a2d1fb88
LP		 2486
2487 return 0;
2488}
2489
d9daae55 2490static int parse_line(const char *fname, unsigned line, const char *buffer, bool *invalid_config) {
1731e34a 2491
cde684a2 2492 _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
3f93da98
ZJS		 2493 _cleanup_(item_free_contents) Item i = {};
2494 ItemArray *existing;
ef43a391 2495 OrderedHashmap *h;
657cf7f4 2496 int r, pos;
6d7b5433 2497 bool force = false, boot = false, allow_failure = false;
3b63d2d3
LP		 2498
2499 assert(fname);
2500 assert(line >= 1);
2501 assert(buffer);
2502
68685607 2503 r = extract_many_words(
4034a06d 2504 &buffer,
68685607 2505 NULL,
12ba2c44 2506 EXTRACT_QUOTES,
4034a06d
LP		 2507 &action,
2508 &path,
2509 &mode,
2510 &user,
2511 &group,
2512 &age,
2513 NULL);
d9daae55 2514 if (r < 0) {
751223fe
ZJS		 2515 if (IN_SET(r, -EINVAL, -EBADSLT))
2516 /* invalid quoting and such or an unknown specifier */
d9daae55 2517 *invalid_config = true;
657cf7f4 2518 return log_error_errno(r, "[%s:%u] Failed to parse line: %m", fname, line);
4b93699d 2519 } else if (r < 2) {
d9daae55 2520 *invalid_config = true;
3b63d2d3 2521 log_error("[%s:%u] Syntax error.", fname, line);
7f2c1f4d 2522 return -EIO;
5008d581
LP		 2523 }
2524
aa5f6817 2525 if (!isempty(buffer) && !streq(buffer, "-")) {
4034a06d
LP		 2526 i.argument = strdup(buffer);
2527 if (!i.argument)
2528 return log_oom();
2529 }
2530
2e78fa79 2531 if (isempty(action)) {
d9daae55 2532 *invalid_config = true;
2e78fa79 2533 log_error("[%s:%u] Command too short '%s'.", fname, line, action);
c4708f13 2534 return -EINVAL;
2e78fa79
LP		 2535 }
2536
5f255144
ZJS		 2537 for (pos = 1; action[pos]; pos++) {
2538 if (action[pos] == '!' && !boot)
2539 boot = true;
2540 else if (action[pos] == '+' && !force)
2541 force = true;
6d7b5433
WD		 2542 else if (action[pos] == '-' && !allow_failure)
2543 allow_failure = true;
5f255144 2544 else {
d9daae55 2545 *invalid_config = true;
5f255144
ZJS		 2546 log_error("[%s:%u] Unknown modifiers in command '%s'",
2547 fname, line, action);
2548 return -EINVAL;
2549 }
2e78fa79
LP		 2550 }
2551
582deb84
ZJS		 2552 if (boot && !arg_boot) {
2553 log_debug("Ignoring entry %s \"%s\" because --boot is not specified.",
2554 action, path);
c4708f13 2555 return 0;
582deb84 2556 }
c4708f13 2557
3f93da98
ZJS		 2558 i.type = action[0];
2559 i.force = force;
6d7b5433 2560 i.allow_failure = allow_failure;
2e78fa79 2561
3f93da98 2562 r = specifier_printf(path, specifier_table, NULL, &i.path);
5a8575ef 2563 if (r == -ENXIO)
4cef1923 2564 return log_unresolvable_specifier(fname, line);
d9daae55 2565 if (r < 0) {
751223fe
ZJS		 2566 if (IN_SET(r, -EINVAL, -EBADSLT))
2567 *invalid_config = true;
4cef1923 2568 return log_error_errno(r, "[%s:%u] Failed to replace specifiers: %s", fname, line, path);
d9daae55 2569 }
1731e34a 2570
a2d1fb88
LP		 2571 r = patch_var_run(fname, line, &i.path);
2572 if (r < 0)
2573 return r;
2574
3f93da98 2575 switch (i.type) {
468d726b 2576
777b87e7 2577 case CREATE_DIRECTORY:
d7b8eec7 2578 case CREATE_SUBVOLUME:
5fb13eb5
LP		 2579 case CREATE_SUBVOLUME_INHERIT_QUOTA:
2580 case CREATE_SUBVOLUME_NEW_QUOTA:
df8dee85 2581 case EMPTY_DIRECTORY:
777b87e7
MS		 2582 case TRUNCATE_DIRECTORY:
2583 case CREATE_FIFO:
2584 case IGNORE_PATH:
78a92a5a 2585 case IGNORE_DIRECTORY_PATH:
777b87e7
MS		 2586 case REMOVE_PATH:
2587 case RECURSIVE_REMOVE_PATH:
e73a03e0 2588 case ADJUST_MODE:
777b87e7
MS		 2589 case RELABEL_PATH:
2590 case RECURSIVE_RELABEL_PATH:
c82500c6 2591 if (i.argument)
bd550f78 2592 log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
c82500c6
LP		 2593
2594 break;
2595
2596 case CREATE_FILE:
2597 case TRUNCATE_FILE:
777b87e7 2598 break;
468d726b
LP		 2599
2600 case CREATE_SYMLINK:
3f93da98
ZJS		 2601 if (!i.argument) {
2602 i.argument = strappend("/usr/share/factory/", i.path);
2603 if (!i.argument)
2f3b873a 2604 return log_oom();
468d726b
LP		 2605 }
2606 break;
2607
31ed59c5 2608 case WRITE_FILE:
3f93da98 2609 if (!i.argument) {
d9daae55 2610 *invalid_config = true;
31ed59c5 2611 log_error("[%s:%u] Write file requires argument.", fname, line);
7f2c1f4d 2612 return -EBADMSG;
31ed59c5
LP		 2613 }
2614 break;
2615
849958d1 2616 case COPY_FILES:
3f93da98
ZJS		 2617 if (!i.argument) {
2618 i.argument = strappend("/usr/share/factory/", i.path);
2619 if (!i.argument)
2f3b873a 2620 return log_oom();
3f93da98 2621 } else if (!path_is_absolute(i.argument)) {
d9daae55 2622 *invalid_config = true;
849958d1
LP		 2623 log_error("[%s:%u] Source path is not absolute.", fname, line);
2624 return -EBADMSG;
2625 }
2626
858d36c1 2627 path_simplify(i.argument, false);
849958d1
LP		 2628 break;
2629
468d726b 2630 case CREATE_CHAR_DEVICE:
3a47c40d 2631 case CREATE_BLOCK_DEVICE:
3f93da98 2632 if (!i.argument) {
d9daae55 2633 *invalid_config = true;
468d726b 2634 log_error("[%s:%u] Device file requires argument.", fname, line);
7f2c1f4d 2635 return -EBADMSG;
468d726b
LP		 2636 }
2637
3a47c40d
LP		 2638 r = parse_dev(i.argument, &i.major_minor);
2639 if (r < 0) {
d9daae55 2640 *invalid_config = true;
3a47c40d 2641 log_error_errno(r, "[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i.argument);
7f2c1f4d 2642 return -EBADMSG;
468d726b
LP		 2643 }
2644
468d726b 2645 break;
468d726b 2646
ebf4e801 2647 case SET_XATTR:
b705ab6a 2648 case RECURSIVE_SET_XATTR:
3f93da98 2649 if (!i.argument) {
d9daae55 2650 *invalid_config = true;
ebf4e801
MW		 2651 log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
2652 return -EBADMSG;
2653 }
bd550f78 2654 r = parse_xattrs_from_arg(&i);
ebf4e801
MW		 2655 if (r < 0)
2656 return r;
2657 break;
2658
f8eeeaf9 2659 case SET_ACL:
b705ab6a 2660 case RECURSIVE_SET_ACL:
f8eeeaf9 2661 if (!i.argument) {
d9daae55 2662 *invalid_config = true;
f8eeeaf9
ZJS		 2663 log_error("[%s:%u] Set ACLs requires argument.", fname, line);
2664 return -EBADMSG;
2665 }
bd550f78 2666 r = parse_acls_from_arg(&i);
f8eeeaf9
ZJS		 2667 if (r < 0)
2668 return r;
2669 break;
2670
88ec4dfa
LP		 2671 case SET_ATTRIBUTE:
2672 case RECURSIVE_SET_ATTRIBUTE:
22c3a6ca 2673 if (!i.argument) {
d9daae55 2674 *invalid_config = true;
88ec4dfa 2675 log_error("[%s:%u] Set file attribute requires argument.", fname, line);
22c3a6ca
GB		 2676 return -EBADMSG;
2677 }
bd550f78 2678 r = parse_attribute_from_arg(&i);
751223fe 2679 if (IN_SET(r, -EINVAL, -EBADSLT))
d9daae55 2680 *invalid_config = true;
22c3a6ca
GB		 2681 if (r < 0)
2682 return r;
2683 break;
2684
777b87e7 2685 default:
582deb84 2686 log_error("[%s:%u] Unknown command type '%c'.", fname, line, (char) i.type);
d9daae55 2687 *invalid_config = true;
7f2c1f4d 2688 return -EBADMSG;
3b63d2d3 2689 }
468d726b 2690
3f93da98
ZJS		 2691 if (!path_is_absolute(i.path)) {
2692 log_error("[%s:%u] Path '%s' not absolute.", fname, line, i.path);
d9daae55 2693 *invalid_config = true;
7f2c1f4d 2694 return -EBADMSG;
3b63d2d3
LP		 2695 }
2696
858d36c1 2697 path_simplify(i.path, false);
3b63d2d3 2698
3f93da98 2699 if (!should_include_path(i.path))
7f2c1f4d 2700 return 0;
5008d581 2701
4cef1923 2702 r = specifier_expansion_from_arg(&i);
5a8575ef 2703 if (r == -ENXIO)
4cef1923 2704 return log_unresolvable_specifier(fname, line);
751223fe
ZJS		 2705 if (r < 0) {
2706 if (IN_SET(r, -EINVAL, -EBADSLT))
2707 *invalid_config = true;
4cef1923
FB		 2708 return log_error_errno(r, "[%s:%u] Failed to substitute specifiers in argument: %m",
2709 fname, line);
751223fe 2710 }
4cef1923 2711
cf9a4abd 2712 if (arg_root) {
cde684a2
LP		 2713 char *p;
2714
1d13f648 2715 p = prefix_root(arg_root, i.path);
cf9a4abd
MM		 2716 if (!p)
2717 return log_oom();
2718
81fa4479 2719 free_and_replace(i.path, p);
cf9a4abd
MM		 2720 }
2721
90937fe3 2722 if (!isempty(user) && !streq(user, "-")) {
4b67834e
LP		 2723 const char *u = user;
2724
fafff8f1 2725 r = get_user_creds(&u, &i.uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING);
4b67834e 2726 if (r < 0) {
d9daae55
ZJS		 2727 *invalid_config = true;
2728 return log_error_errno(r, "[%s:%u] Unknown user '%s'.", fname, line, user);
3b63d2d3
LP		 2729 }
2730
3f93da98 2731 i.uid_set = true;
3b63d2d3
LP		 2732 }
2733
90937fe3 2734 if (!isempty(group) && !streq(group, "-")) {
4b67834e
LP		 2735 const char *g = group;
2736
fafff8f1 2737 r = get_group_creds(&g, &i.gid, USER_CREDS_ALLOW_MISSING);
4b67834e 2738 if (r < 0) {
d9daae55 2739 *invalid_config = true;
3b63d2d3 2740 log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
7f2c1f4d 2741 return r;
3b63d2d3
LP		 2742 }
2743
3f93da98 2744 i.gid_set = true;
3b63d2d3
LP		 2745 }
2746
90937fe3 2747 if (!isempty(mode) && !streq(mode, "-")) {
abef3f91 2748 const char *mm = mode;
3b63d2d3
LP		 2749 unsigned m;
2750
abef3f91 2751 if (*mm == '~') {
3f93da98 2752 i.mask_perms = true;
abef3f91
LP		 2753 mm++;
2754 }
2755
2ff7b0a5 2756 if (parse_mode(mm, &m) < 0) {
d9daae55 2757 *invalid_config = true;
3b63d2d3 2758 log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode);
2ff7b0a5 2759 return -EBADMSG;
3b63d2d3
LP		 2760 }
2761
3f93da98
ZJS		 2762 i.mode = m;
2763 i.mode_set = true;
3b63d2d3 2764 } else
5fb13eb5 2765 i.mode = IN_SET(i.type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA) ? 0755 : 0644;
3b63d2d3 2766
90937fe3 2767 if (!isempty(age) && !streq(age, "-")) {
24f3a374
LP		 2768 const char *a = age;
2769
2770 if (*a == '~') {
3f93da98 2771 i.keep_first_level = true;
24f3a374
LP		 2772 a++;
2773 }
2774
3f93da98 2775 if (parse_sec(a, &i.age) < 0) {
d9daae55 2776 *invalid_config = true;
3b63d2d3 2777 log_error("[%s:%u] Invalid age '%s'.", fname, line, age);
7f2c1f4d 2778 return -EBADMSG;
3b63d2d3
LP		 2779 }
2780
3f93da98 2781 i.age_set = true;
3b63d2d3
LP		 2782 }
2783
3f93da98 2784 h = needs_glob(i.type) ? globs : items;
bfe95f35 2785
ef43a391 2786 existing = ordered_hashmap_get(h, i.path);
468d726b 2787 if (existing) {
96d10d78 2788 size_t n;
3f93da98 2789
96d10d78 2790 for (n = 0; n < existing->n_items; n++) {
6487ada8 2791 if (!item_compatible(existing->items + n, &i)) {
e286dbaf
ZJS		 2792 log_notice("[%s:%u] Duplicate line for path \"%s\", ignoring.",
2793 fname, line, i.path);
6487ada8
MP		 2794 return 0;
2795 }
ebf4e801
MW		 2796 }
2797 } else {
3f93da98 2798 existing = new0(ItemArray, 1);
07982ed1
LP		 2799 if (!existing)
2800 return log_oom();
2801
ef43a391 2802 r = ordered_hashmap_put(h, i.path, existing);
ccd114f0
LP		 2803 if (r < 0) {
2804 free(existing);
3f93da98 2805 return log_oom();
ccd114f0 2806 }
bfe95f35
LP		 2807 }
2808
96d10d78 2809 if (!GREEDY_REALLOC(existing->items, existing->allocated, existing->n_items + 1))
3f93da98 2810 return log_oom();
5008d581 2811
7ab7529d
LP		 2812 existing->items[existing->n_items++] = i;
2813 i = (struct Item) {};
dd449aca
ZJS		 2814
2815 /* Sort item array, to enforce stable ordering of application */
96d10d78 2816 typesafe_qsort(existing->items, existing->n_items, item_compare);
17493fa5 2817
7f2c1f4d 2818 return 0;
5008d581
LP		 2819}
2820
ceaaeb9b
ZJS		 2821static int cat_config(char **config_dirs, char **args) {
2822 _cleanup_strv_free_ char **files = NULL;
2823 int r;
2824
2825 r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, NULL);
2826 if (r < 0)
2827 return r;
2828
2829 return cat_files(NULL, files, 0);
2830}
2831
37ec0fdd
LP		 2832static int help(void) {
2833 _cleanup_free_ char *link = NULL;
2834 int r;
2835
2836 r = terminal_urlify_man("systemd-tmpfiles", "8", &link);
2837 if (r < 0)
2838 return log_oom();
2839
522d4a49
LP		 2840 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
2841 "Creates, deletes and cleans up volatile and temporary files and directories.\n\n"
5c795114 2842 " -h --help Show this help\n"
f2b5ca0e 2843 " --user Execute user configuration\n"
eb9da376 2844 " --version Show package version\n"
ceaaeb9b 2845 " --cat-config Show configuration files\n"
5c795114
DR		 2846 " --create Create marked files/directories\n"
2847 " --clean Clean up marked directories\n"
2848 " --remove Remove marked files/directories\n"
81815651 2849 " --boot Execute actions only safe at boot\n"
79ca888f
ZJS		 2850 " --prefix=PATH Only apply rules with the specified prefix\n"
2851 " --exclude-prefix=PATH Ignore rules with the specified prefix\n"
d9daae55 2852 " --root=PATH Operate on an alternate filesystem root\n"
a6d8474f 2853 " --replace=PATH Treat arguments as replacement for PATH\n"
dcd5c891 2854 " --no-pager Do not pipe output into a pager\n"
37ec0fdd
LP		 2855 "\nSee the %s for details.\n"
2856 , program_invocation_short_name
2857 , link
2858 );
2859
2860 return 0;
3b63d2d3
LP		 2861}
2862
2863static int parse_argv(int argc, char *argv[]) {
2864
2865 enum {
eb9da376 2866 ARG_VERSION = 0x100,
ceaaeb9b 2867 ARG_CAT_CONFIG,
f2b5ca0e 2868 ARG_USER,
3b63d2d3
LP		 2869 ARG_CREATE,
2870 ARG_CLEAN,
fba6e687 2871 ARG_REMOVE,
81815651 2872 ARG_BOOT,
5c795114
DR		 2873 ARG_PREFIX,
2874 ARG_EXCLUDE_PREFIX,
cf9a4abd 2875 ARG_ROOT,
a6d8474f 2876 ARG_REPLACE,
dcd5c891 2877 ARG_NO_PAGER,
3b63d2d3
LP		 2878 };
2879
2880 static const struct option options[] = {
5c795114 2881 { "help", no_argument, NULL, 'h' },
f2b5ca0e 2882 { "user", no_argument, NULL, ARG_USER },
eb9da376 2883 { "version", no_argument, NULL, ARG_VERSION },
ceaaeb9b 2884 { "cat-config", no_argument, NULL, ARG_CAT_CONFIG },
5c795114
DR		 2885 { "create", no_argument, NULL, ARG_CREATE },
2886 { "clean", no_argument, NULL, ARG_CLEAN },
2887 { "remove", no_argument, NULL, ARG_REMOVE },
81815651 2888 { "boot", no_argument, NULL, ARG_BOOT },
5c795114
DR		 2889 { "prefix", required_argument, NULL, ARG_PREFIX },
2890 { "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
cf9a4abd 2891 { "root", required_argument, NULL, ARG_ROOT },
a6d8474f 2892 { "replace", required_argument, NULL, ARG_REPLACE },
dcd5c891 2893 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
eb9da376 2894 {}
3b63d2d3
LP		 2895 };
2896
0f474365 2897 int c, r;
3b63d2d3
LP		 2898
2899 assert(argc >= 0);
2900 assert(argv);
2901
601185b4 2902 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
3b63d2d3
LP		 2903
2904 switch (c) {
2905
2906 case 'h':
37ec0fdd 2907 return help();
eb9da376
LP		 2908
2909 case ARG_VERSION:
3f6fd1ba 2910 return version();
3b63d2d3 2911
ceaaeb9b
ZJS		 2912 case ARG_CAT_CONFIG:
2913 arg_cat_config = true;
2914 break;
2915
f2b5ca0e
ZJS		 2916 case ARG_USER:
2917 arg_user = true;
2918 break;
2919
3b63d2d3 2920 case ARG_CREATE:
1a967b6b 2921 arg_operation |= OPERATION_CREATE;
3b63d2d3
LP		 2922 break;
2923
2924 case ARG_CLEAN:
1a967b6b 2925 arg_operation |= OPERATION_CLEAN;
3b63d2d3
LP		 2926 break;
2927
2928 case ARG_REMOVE:
1a967b6b 2929 arg_operation |= OPERATION_REMOVE;
3b63d2d3
LP		 2930 break;
2931
81815651
ZJS		 2932 case ARG_BOOT:
2933 arg_boot = true;
c4708f13
ZJS		 2934 break;
2935
fba6e687 2936 case ARG_PREFIX:
7bc040fa 2937 if (strv_push(&arg_include_prefixes, optarg) < 0)
a2aced4a 2938 return log_oom();
fba6e687
LP		 2939 break;
2940
5c795114 2941 case ARG_EXCLUDE_PREFIX:
7bc040fa 2942 if (strv_push(&arg_exclude_prefixes, optarg) < 0)
5c795114
DR		 2943 return log_oom();
2944 break;
2945
cf9a4abd 2946 case ARG_ROOT:
0f03c2a4 2947 r = parse_path_argument_and_warn(optarg, true, &arg_root);
0f474365 2948 if (r < 0)
0f03c2a4 2949 return r;
cf9a4abd
MM		 2950 break;
2951
a6d8474f
ZJS		 2952 case ARG_REPLACE:
2953 if (!path_is_absolute(optarg) ||
baaa35ad
ZJS		 2954 !endswith(optarg, ".conf"))
2955 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2956 "The argument to --replace= must an absolute path to a config file");
a6d8474f
ZJS		 2957
2958 arg_replace = optarg;
2959 break;
2960
dcd5c891 2961 case ARG_NO_PAGER:
0221d68a 2962 arg_pager_flags |= PAGER_DISABLE;
dcd5c891
LP		 2963 break;
2964
3b63d2d3
LP		 2965 case '?':
2966 return -EINVAL;
2967
2968 default:
eb9da376 2969 assert_not_reached("Unhandled option");
3b63d2d3 2970 }
3b63d2d3 2971
baaa35ad
ZJS		 2972 if (arg_operation == 0 && !arg_cat_config)
2973 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2974 "You need to specify at least one of --clean, --create or --remove.");
3b63d2d3 2975
baaa35ad
ZJS		 2976 if (arg_replace && arg_cat_config)
2977 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2978 "Option --replace= is not supported with --cat-config");
ceaaeb9b 2979
baaa35ad
ZJS		 2980 if (arg_replace && optind >= argc)
2981 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
2982 "When --replace= is given, some configuration items must be specified");
a6d8474f 2983
3b63d2d3
LP		 2984 return 1;
2985}
2986
a6d8474f 2987static int read_config_file(char **config_dirs, const char *fn, bool ignore_enoent, bool *invalid_config) {
f7ac1ed2 2988 _cleanup_fclose_ FILE *_f = NULL;
78a92a5a 2989 Iterator iterator;
1731e34a 2990 unsigned v = 0;
2a98ae4a 2991 FILE *f;
78a92a5a 2992 Item *i;
4e68ec18 2993 int r = 0;
fba6e687
LP		 2994
2995 assert(fn);
2996
f7ac1ed2 2997 if (streq(fn, "-")) {
a6d8474f 2998 log_debug("Reading config from stdin…");
f7ac1ed2
ZJS		 2999 fn = "<stdin>";
3000 f = stdin;
3001 } else {
a6d8474f 3002 r = search_and_fopen(fn, "re", arg_root, (const char**) config_dirs, &_f);
f7ac1ed2
ZJS		 3003 if (r < 0) {
3004 if (ignore_enoent && r == -ENOENT) {
3005 log_debug_errno(r, "Failed to open \"%s\", ignoring: %m", fn);
3006 return 0;
3007 }
fba6e687 3008
f7ac1ed2
ZJS		 3009 return log_error_errno(r, "Failed to open '%s': %m", fn);
3010 }
a6d8474f 3011 log_debug("Reading config file \"%s\"…", fn);
f7ac1ed2 3012 f = _f;
fba6e687
LP		 3013 }
3014
2a98ae4a
LP		 3015 for (;;) {
3016 _cleanup_free_ char *line = NULL;
3017 bool invalid_line = false;
1731e34a 3018 char *l;
fba6e687 3019 int k;
2a98ae4a
LP		 3020
3021 k = read_line(f, LONG_LINE_MAX, &line);
3022 if (k < 0)
3023 return log_error_errno(k, "Failed to read '%s': %m", fn);
3024 if (k == 0)
3025 break;
fba6e687 3026
fba6e687
LP		 3027 v++;
3028
3029 l = strstrip(line);
4c701096 3030 if (IN_SET(*l, 0, '#'))
fba6e687
LP		 3031 continue;
3032
d9daae55
ZJS		 3033 k = parse_line(fn, v, l, &invalid_line);
3034 if (k < 0) {
3035 if (invalid_line)
3036 /* Allow reporting with a special code if the caller requested this */
3037 *invalid_config = true;
3038 else if (r == 0)
3039 /* The first error becomes our return value */
3040 r = k;
3041 }
fba6e687
LP		 3042 }
3043
78a92a5a 3044 /* we have to determine age parameter for each entry of type X */
ef43a391 3045 ORDERED_HASHMAP_FOREACH(i, globs, iterator) {
78a92a5a
MS		 3046 Iterator iter;
3047 Item *j, *candidate_item = NULL;
3048
3049 if (i->type != IGNORE_DIRECTORY_PATH)
3050 continue;
3051
ef43a391 3052 ORDERED_HASHMAP_FOREACH(j, items, iter) {
5fb13eb5 3053 if (!IN_SET(j->type, CREATE_DIRECTORY, TRUNCATE_DIRECTORY, CREATE_SUBVOLUME, CREATE_SUBVOLUME_INHERIT_QUOTA, CREATE_SUBVOLUME_NEW_QUOTA))
78a92a5a
MS		 3054 continue;
3055
3056 if (path_equal(j->path, i->path)) {
3057 candidate_item = j;
3058 break;
3059 }
3060
3061 if ((!candidate_item && path_startswith(i->path, j->path)) ||
3062 (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
3063 candidate_item = j;
3064 }
3065
9ed2a35e 3066 if (candidate_item && candidate_item->age_set) {
78a92a5a
MS		 3067 i->age = candidate_item->age;
3068 i->age_set = true;
3069 }
3070 }
3071
fba6e687 3072 if (ferror(f)) {
56f64d95 3073 log_error_errno(errno, "Failed to read from file %s: %m", fn);
fba6e687
LP		 3074 if (r == 0)
3075 r = -EIO;
3076 }
3077
fba6e687
LP		 3078 return r;
3079}
3080
a6d8474f
ZJS		 3081static int parse_arguments(char **config_dirs, char **args, bool *invalid_config) {
3082 char **arg;
3083 int r;
3084
3085 STRV_FOREACH(arg, args) {
3086 r = read_config_file(config_dirs, *arg, false, invalid_config);
3087 if (r < 0)
3088 return r;
3089 }
3090
3091 return 0;
3092}
3093
3094static int read_config_files(char **config_dirs, char **args, bool *invalid_config) {
3095 _cleanup_strv_free_ char **files = NULL;
3096 _cleanup_free_ char *p = NULL;
3097 char **f;
3098 int r;
3099
ceaaeb9b 3100 r = conf_files_list_with_replacement(arg_root, config_dirs, arg_replace, &files, &p);
a6d8474f 3101 if (r < 0)
ceaaeb9b 3102 return r;
a6d8474f
ZJS		 3103
3104 STRV_FOREACH(f, files)
3105 if (p && path_equal(*f, p)) {
3106 log_debug("Parsing arguments at position \"%s\"…", *f);
3107
3108 r = parse_arguments(config_dirs, args, invalid_config);
3109 if (r < 0)
3110 return r;
3111 } else
3112 /* Just warn, ignore result otherwise.
3113 * read_config_file() has some debug output, so no need to print anything. */
3114 (void) read_config_file(config_dirs, *f, true, invalid_config);
3115
3116 return 0;
3117}
3118
811a1587
LP		 3119static int link_parent(ItemArray *a) {
3120 const char *path;
3121 char *prefix;
3122 int r;
3123
3124 assert(a);
3125
09f467ac 3126 /* Finds the closest "parent" item array for the specified item array. Then registers the specified item array
811a1587
LP		 3127 * as child of it, and fills the parent in, linking them both ways. This allows us to later create parents
3128 * before their children, and clean up/remove children before their parents. */
3129
3130 if (a->n_items <= 0)
3131 return 0;
3132
3133 path = a->items[0].path;
6e9417f5 3134 prefix = newa(char, strlen(path) + 1);
811a1587
LP		 3135 PATH_FOREACH_PREFIX(prefix, path) {
3136 ItemArray *j;
3137
3138 j = ordered_hashmap_get(items, prefix);
bd0ce244
LP		 3139 if (!j)
3140 j = ordered_hashmap_get(globs, prefix);
811a1587
LP		 3141 if (j) {
3142 r = set_ensure_allocated(&j->children, NULL);
3143 if (r < 0)
3144 return log_oom();
3145
3146 r = set_put(j->children, a);
3147 if (r < 0)
3148 return log_oom();
3149
3150 a->parent = j;
3151 return 1;
3152 }
3153 }
3154
3155 return 0;
3156}
3157
87938c3b
YW		 3158DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_array_hash_ops, char, string_hash_func, string_compare_func,
3159 ItemArray, item_array_free);
3160
3161static int run(int argc, char *argv[]) {
f2b5ca0e 3162 _cleanup_strv_free_ char **config_dirs = NULL;
d9daae55 3163 bool invalid_config = false;
64adb379
LP		 3164 Iterator iterator;
3165 ItemArray *a;
44ac4f88
LP		 3166 enum {
3167 PHASE_REMOVE_AND_CLEAN,
3168 PHASE_CREATE,
3169 _PHASE_MAX
3170 } phase;
87938c3b 3171 int r, k;
3b63d2d3 3172
fdcad0c2
LP		 3173 r = parse_argv(argc, argv);
3174 if (r <= 0)
87938c3b 3175 return r;
5008d581 3176
6bf3c61c 3177 log_setup_service();
5008d581 3178
e5358401
LP		 3179 /* Descending down file system trees might take a lot of fds */
3180 (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE);
3181
f2b5ca0e
ZJS		 3182 if (arg_user) {
3183 r = user_config_paths(&config_dirs);
87938c3b
YW		 3184 if (r < 0)
3185 return log_error_errno(r, "Failed to initialize configuration directory list: %m");
f2b5ca0e
ZJS		 3186 } else {
3187 config_dirs = strv_split_nulstr(CONF_PATHS_NULSTR("tmpfiles.d"));
87938c3b
YW		 3188 if (!config_dirs)
3189 return log_oom();
f2b5ca0e
ZJS		 3190 }
3191
79c91cec 3192 if (DEBUG_LOGGING) {
f2b5ca0e
ZJS		 3193 _cleanup_free_ char *t = NULL;
3194
3195 t = strv_join(config_dirs, "\n\t");
3196 if (t)
bb9947be 3197 log_debug("Looking for configuration files in (higher priority first):\n\t%s", t);
f2b5ca0e
ZJS		 3198 }
3199
ceaaeb9b 3200 if (arg_cat_config) {
0221d68a 3201 (void) pager_open(arg_pager_flags);
dcd5c891 3202
87938c3b 3203 return cat_config(config_dirs, argv + optind);
ceaaeb9b
ZJS		 3204 }
3205
3206 umask(0022);
3207
3208 mac_selinux_init();
3209
87938c3b
YW		 3210 items = ordered_hashmap_new(&item_array_hash_ops);
3211 globs = ordered_hashmap_new(&item_array_hash_ops);
3212 if (!items || !globs)
3213 return log_oom();
ceaaeb9b 3214
a6d8474f
ZJS		 3215 /* If command line arguments are specified along with --replace, read all
3216 * configuration files and insert the positional arguments at the specified
3217 * place. Otherwise, if command line arguments are specified, execute just
3218 * them, and finally, without --replace= or any positional arguments, just
3219 * read configuration and execute it.
3220 */
3221 if (arg_replace || optind >= argc)
3222 r = read_config_files(config_dirs, argv + optind, &invalid_config);
3223 else
3224 r = parse_arguments(config_dirs, argv + optind, &invalid_config);
3225 if (r < 0)
87938c3b 3226 return r;
5008d581 3227
811a1587 3228 /* Let's now link up all child/parent relationships */
ef43a391 3229 ORDERED_HASHMAP_FOREACH(a, items, iterator) {
811a1587
LP		 3230 r = link_parent(a);
3231 if (r < 0)
87938c3b 3232 return r;
1db50423 3233 }
ef43a391 3234 ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
811a1587
LP		 3235 r = link_parent(a);
3236 if (r < 0)
87938c3b 3237 return r;
811a1587
LP		 3238 }
3239
64adb379
LP		 3240 /* If multiple operations are requested, let's first run the remove/clean operations, and only then the create
3241 * operations. i.e. that we first clean out the platform we then build on. */
44ac4f88 3242 for (phase = 0; phase < _PHASE_MAX; phase++) {
64adb379 3243 OperationMask op;
b8bb3e8f 3244
44ac4f88 3245 if (phase == PHASE_REMOVE_AND_CLEAN)
64adb379 3246 op = arg_operation & (OPERATION_REMOVE|OPERATION_CLEAN);
44ac4f88 3247 else if (phase == PHASE_CREATE)
64adb379
LP		 3248 op = arg_operation & OPERATION_CREATE;
3249 else
3250 assert_not_reached("unexpected phase");
3251
3252 if (op == 0) /* Nothing requested in this phase */
3253 continue;
3254
3255 /* The non-globbing ones usually create things, hence we apply them first */
3256 ORDERED_HASHMAP_FOREACH(a, items, iterator) {
3257 k = process_item_array(a, op);
87938c3b
YW		 3258 if (k < 0 && r >= 0)
3259 r = k;
64adb379
LP		 3260 }
3261
3262 /* The globbing ones usually alter things, hence we apply them second. */
3263 ORDERED_HASHMAP_FOREACH(a, globs, iterator) {
3264 k = process_item_array(a, op);
87938c3b
YW		 3265 if (k < 0 && r >= 0)
3266 r = k;
64adb379 3267 }
1db50423 3268 }
3b63d2d3 3269
87938c3b
YW		 3270 if (ERRNO_IS_RESOURCE(-r))
3271 return r;
3272 if (invalid_config)
d9daae55 3273 return EX_DATAERR;
87938c3b 3274 if (r < 0)
bb9947be 3275 return EX_CANTCREAT;
87938c3b 3276 return 0;
5008d581 3277}
87938c3b
YW		 3278
3279DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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