Commit | Line | Data |
---|---|---|
16edf865 WD |
1 | /* |
2 | * Extended Attribute support for rsync. | |
3 | * Written by Jay Fenlason, vaguely based on the ACLs patch. | |
4 | * | |
5 | * Copyright (C) 2004 Red Hat, Inc. | |
445640e8 | 6 | * Copyright (C) 2006-2009 Wayne Davison |
16edf865 WD |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
8e41b68e WD |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 3 of the License, or | |
11 | * (at your option) any later version. | |
16edf865 WD |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
4fd842f9 | 19 | * with this program; if not, visit the http://fsf.org website. |
16edf865 WD |
20 | */ |
21 | ||
22 | #include "rsync.h" | |
1b42f628 | 23 | #include "ifuncs.h" |
16edf865 WD |
24 | #include "lib/sysxattrs.h" |
25 | ||
26 | #ifdef SUPPORT_XATTRS | |
27 | ||
28 | extern int dry_run; | |
29 | extern int am_root; | |
30 | extern int am_sender; | |
31 | extern int am_generator; | |
32 | extern int read_only; | |
33 | extern int list_only; | |
524eaa82 | 34 | extern int preserve_xattrs; |
16edf865 WD |
35 | extern int checksum_seed; |
36 | ||
37 | #define RSYNC_XAL_INITIAL 5 | |
38 | #define RSYNC_XAL_LIST_INITIAL 100 | |
39 | ||
40 | #define MAX_FULL_DATUM 32 | |
41 | ||
42 | #define HAS_PREFIX(str, prfx) (*(str) == *(prfx) \ | |
43 | && strncmp(str, prfx, sizeof (prfx) - 1) == 0) | |
44 | ||
45 | #define XATTR_ABBREV(x) ((size_t)((x).name - (x).datum) < (x).datum_len) | |
46 | ||
6283e9ef WD |
47 | #define XSTATE_ABBREV 1 |
48 | #define XSTATE_DONE 2 | |
49 | #define XSTATE_TODO 3 | |
16edf865 WD |
50 | |
51 | #define USER_PREFIX "user." | |
52 | #define UPRE_LEN ((int)sizeof USER_PREFIX - 1) | |
53 | #define SYSTEM_PREFIX "system." | |
54 | #define SPRE_LEN ((int)sizeof SYSTEM_PREFIX - 1) | |
55 | ||
56 | #ifdef HAVE_LINUX_XATTRS | |
9439c0cb WD |
57 | #define MIGHT_NEED_RPRE (am_root < 0) |
58 | #define RSYNC_PREFIX USER_PREFIX "rsync." | |
16edf865 | 59 | #else |
9439c0cb | 60 | #define MIGHT_NEED_RPRE am_root |
16edf865 | 61 | #define RSYNC_PREFIX "rsync." |
16edf865 | 62 | #endif |
9439c0cb WD |
63 | #define RPRE_LEN ((int)sizeof RSYNC_PREFIX - 1) |
64 | ||
d724dd18 WD |
65 | #define XSTAT_SUFFIX "stat" |
66 | #define XSTAT_ATTR RSYNC_PREFIX "%" XSTAT_SUFFIX | |
67 | #define XACC_ACL_SUFFIX "aacl" | |
68 | #define XACC_ACL_ATTR RSYNC_PREFIX "%" XACC_ACL_SUFFIX | |
69 | #define XDEF_ACL_SUFFIX "dacl" | |
70 | #define XDEF_ACL_ATTR RSYNC_PREFIX "%" XDEF_ACL_SUFFIX | |
16edf865 WD |
71 | |
72 | typedef struct { | |
73 | char *datum, *name; | |
74 | size_t datum_len, name_len; | |
68ddbaf6 | 75 | int num; |
16edf865 WD |
76 | } rsync_xa; |
77 | ||
78 | static size_t namebuf_len = 0; | |
79 | static char *namebuf = NULL; | |
80 | ||
81 | static item_list empty_xattr = EMPTY_ITEM_LIST; | |
82 | static item_list rsync_xal_l = EMPTY_ITEM_LIST; | |
83 | ||
ea53d161 WD |
84 | static size_t prior_xattr_count = (size_t)-1; |
85 | ||
16edf865 WD |
86 | /* ------------------------------------------------------------------------- */ |
87 | ||
88 | static void rsync_xal_free(item_list *xalp) | |
89 | { | |
90 | size_t i; | |
91 | rsync_xa *rxas = xalp->items; | |
92 | ||
93 | for (i = 0; i < xalp->count; i++) { | |
94 | free(rxas[i].datum); | |
95 | /*free(rxas[i].name);*/ | |
96 | } | |
97 | xalp->count = 0; | |
98 | } | |
99 | ||
13710874 | 100 | void free_xattr(stat_x *sxp) |
16edf865 WD |
101 | { |
102 | if (!sxp->xattr) | |
103 | return; | |
104 | rsync_xal_free(sxp->xattr); | |
105 | free(sxp->xattr); | |
106 | sxp->xattr = NULL; | |
107 | } | |
108 | ||
109 | static int rsync_xal_compare_names(const void *x1, const void *x2) | |
110 | { | |
111 | const rsync_xa *xa1 = x1; | |
112 | const rsync_xa *xa2 = x2; | |
113 | return strcmp(xa1->name, xa2->name); | |
114 | } | |
115 | ||
116 | static ssize_t get_xattr_names(const char *fname) | |
117 | { | |
118 | ssize_t list_len; | |
71daa07f | 119 | double arg; |
16edf865 WD |
120 | |
121 | if (!namebuf) { | |
122 | namebuf_len = 1024; | |
123 | namebuf = new_array(char, namebuf_len); | |
124 | if (!namebuf) | |
125 | out_of_memory("get_xattr_names"); | |
126 | } | |
127 | ||
71daa07f WD |
128 | while (1) { |
129 | /* The length returned includes all the '\0' terminators. */ | |
130 | list_len = sys_llistxattr(fname, namebuf, namebuf_len); | |
131 | if (list_len >= 0) { | |
132 | if ((size_t)list_len <= namebuf_len) | |
133 | break; | |
134 | } else if (errno == ENOTSUP) | |
135 | return 0; | |
136 | else if (errno != ERANGE) { | |
137 | arg = (double)namebuf_len; | |
138 | got_error: | |
3f0211b6 | 139 | rsyserr(FERROR_XFER, errno, |
71daa07f WD |
140 | "get_xattr_names: llistxattr(\"%s\",%.0f) failed", |
141 | fname, arg); | |
16edf865 WD |
142 | return -1; |
143 | } | |
71daa07f WD |
144 | list_len = sys_llistxattr(fname, NULL, 0); |
145 | if (list_len < 0) { | |
146 | arg = 0; | |
147 | goto got_error; | |
148 | } | |
16edf865 WD |
149 | if (namebuf_len) |
150 | free(namebuf); | |
151 | namebuf_len = list_len + 1024; | |
152 | namebuf = new_array(char, namebuf_len); | |
153 | if (!namebuf) | |
154 | out_of_memory("get_xattr_names"); | |
16edf865 WD |
155 | } |
156 | ||
71daa07f | 157 | return list_len; |
16edf865 WD |
158 | } |
159 | ||
160 | /* On entry, the *len_ptr parameter contains the size of the extra space we | |
161 | * should allocate when we create a buffer for the data. On exit, it contains | |
162 | * the length of the datum. */ | |
163 | static char *get_xattr_data(const char *fname, const char *name, size_t *len_ptr, | |
164 | int no_missing_error) | |
165 | { | |
166 | size_t datum_len = sys_lgetxattr(fname, name, NULL, 0); | |
41979f25 | 167 | size_t extra_len = *len_ptr; |
16edf865 WD |
168 | char *ptr; |
169 | ||
41979f25 WD |
170 | *len_ptr = datum_len; |
171 | ||
16edf865 WD |
172 | if (datum_len == (size_t)-1) { |
173 | if (errno == ENOTSUP || no_missing_error) | |
174 | return NULL; | |
3f0211b6 | 175 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
176 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",0) failed", |
177 | fname, name); | |
178 | return NULL; | |
179 | } | |
180 | ||
41979f25 WD |
181 | if (!datum_len && !extra_len) |
182 | extra_len = 1; /* request non-zero amount of memory */ | |
774d1c36 WD |
183 | if (datum_len + extra_len < datum_len) |
184 | overflow_exit("get_xattr_data"); | |
185 | if (!(ptr = new_array(char, datum_len + extra_len))) | |
16edf865 WD |
186 | out_of_memory("get_xattr_data"); |
187 | ||
16edf865 WD |
188 | if (datum_len) { |
189 | size_t len = sys_lgetxattr(fname, name, ptr, datum_len); | |
190 | if (len != datum_len) { | |
191 | if (len == (size_t)-1) { | |
3f0211b6 | 192 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
193 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)" |
194 | " failed", fname, name, (long)datum_len); | |
195 | } else { | |
3f0211b6 | 196 | rprintf(FERROR_XFER, |
16edf865 WD |
197 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)" |
198 | " returned %ld\n", fname, name, | |
199 | (long)datum_len, (long)len); | |
200 | } | |
201 | free(ptr); | |
202 | return NULL; | |
203 | } | |
204 | } | |
205 | ||
206 | return ptr; | |
207 | } | |
208 | ||
209 | static int rsync_xal_get(const char *fname, item_list *xalp) | |
210 | { | |
211 | ssize_t list_len, name_len; | |
212 | size_t datum_len, name_offset; | |
213 | char *name, *ptr; | |
214 | #ifdef HAVE_LINUX_XATTRS | |
f8722dba | 215 | int user_only = am_sender ? 0 : am_root <= 0; |
16edf865 | 216 | #endif |
68ddbaf6 WD |
217 | rsync_xa *rxa; |
218 | int count; | |
16edf865 WD |
219 | |
220 | /* This puts the name list into the "namebuf" buffer. */ | |
221 | if ((list_len = get_xattr_names(fname)) < 0) | |
222 | return -1; | |
223 | ||
224 | for (name = namebuf; list_len > 0; name += name_len) { | |
16edf865 WD |
225 | name_len = strlen(name) + 1; |
226 | list_len -= name_len; | |
227 | ||
228 | #ifdef HAVE_LINUX_XATTRS | |
229 | /* We always ignore the system namespace, and non-root | |
230 | * ignores everything but the user namespace. */ | |
231 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) | |
232 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
233 | continue; | |
234 | #endif | |
235 | ||
524eaa82 | 236 | /* No rsync.%FOO attributes are copied w/o 2 -X options. */ |
a685271d WD |
237 | if (name_len > RPRE_LEN && name[RPRE_LEN] == '%' |
238 | && HAS_PREFIX(name, RSYNC_PREFIX)) { | |
239 | if ((am_sender && preserve_xattrs < 2) | |
d724dd18 WD |
240 | || (am_root < 0 |
241 | && (strcmp(name+RPRE_LEN+1, XSTAT_SUFFIX) == 0 | |
242 | || strcmp(name+RPRE_LEN+1, XACC_ACL_SUFFIX) == 0 | |
243 | || strcmp(name+RPRE_LEN+1, XDEF_ACL_SUFFIX) == 0))) | |
a685271d WD |
244 | continue; |
245 | } | |
9439c0cb | 246 | |
16edf865 WD |
247 | datum_len = name_len; /* Pass extra size to get_xattr_data() */ |
248 | if (!(ptr = get_xattr_data(fname, name, &datum_len, 0))) | |
249 | return -1; | |
250 | ||
251 | if (datum_len > MAX_FULL_DATUM) { | |
252 | /* For large datums, we store a flag and a checksum. */ | |
253 | name_offset = 1 + MAX_DIGEST_LEN; | |
254 | sum_init(checksum_seed); | |
255 | sum_update(ptr, datum_len); | |
256 | free(ptr); | |
257 | ||
258 | if (!(ptr = new_array(char, name_offset + name_len))) | |
259 | out_of_memory("rsync_xal_get"); | |
260 | *ptr = XSTATE_ABBREV; | |
261 | sum_end(ptr + 1); | |
262 | } else | |
263 | name_offset = datum_len; | |
264 | ||
a685271d WD |
265 | rxa = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL); |
266 | rxa->name = ptr + name_offset; | |
267 | memcpy(rxa->name, name, name_len); | |
268 | rxa->datum = ptr; | |
269 | rxa->name_len = name_len; | |
270 | rxa->datum_len = datum_len; | |
16edf865 | 271 | } |
68ddbaf6 WD |
272 | count = xalp->count; |
273 | rxa = xalp->items; | |
274 | if (count > 1) | |
275 | qsort(rxa, count, sizeof (rsync_xa), rsync_xal_compare_names); | |
276 | for (rxa += count-1; count; count--, rxa--) | |
277 | rxa->num = count; | |
16edf865 WD |
278 | return 0; |
279 | } | |
280 | ||
281 | /* Read the xattr(s) for this filename. */ | |
13710874 | 282 | int get_xattr(const char *fname, stat_x *sxp) |
16edf865 WD |
283 | { |
284 | sxp->xattr = new(item_list); | |
285 | *sxp->xattr = empty_xattr; | |
286 | if (rsync_xal_get(fname, sxp->xattr) < 0) { | |
287 | free_xattr(sxp); | |
288 | return -1; | |
289 | } | |
290 | return 0; | |
291 | } | |
292 | ||
e9489cd6 WD |
293 | int copy_xattrs(const char *source, const char *dest) |
294 | { | |
295 | ssize_t list_len, name_len; | |
296 | size_t datum_len; | |
297 | char *name, *ptr; | |
298 | #ifdef HAVE_LINUX_XATTRS | |
f8722dba | 299 | int user_only = am_root <= 0; |
e9489cd6 WD |
300 | #endif |
301 | ||
302 | /* This puts the name list into the "namebuf" buffer. */ | |
303 | if ((list_len = get_xattr_names(source)) < 0) | |
304 | return -1; | |
305 | ||
306 | for (name = namebuf; list_len > 0; name += name_len) { | |
307 | name_len = strlen(name) + 1; | |
308 | list_len -= name_len; | |
309 | ||
310 | #ifdef HAVE_LINUX_XATTRS | |
311 | /* We always ignore the system namespace, and non-root | |
312 | * ignores everything but the user namespace. */ | |
313 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) | |
314 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
315 | continue; | |
316 | #endif | |
317 | ||
318 | datum_len = 0; | |
319 | if (!(ptr = get_xattr_data(source, name, &datum_len, 0))) | |
320 | return -1; | |
321 | if (sys_lsetxattr(dest, name, ptr, datum_len) < 0) { | |
322 | int save_errno = errno ? errno : EINVAL; | |
323 | rsyserr(FERROR_XFER, errno, | |
324 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", | |
325 | dest, name); | |
326 | errno = save_errno; | |
327 | return -1; | |
328 | } | |
329 | free(ptr); | |
330 | } | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
16edf865 WD |
335 | static int find_matching_xattr(item_list *xalp) |
336 | { | |
337 | size_t i, j; | |
338 | item_list *lst = rsync_xal_l.items; | |
339 | ||
340 | for (i = 0; i < rsync_xal_l.count; i++) { | |
341 | rsync_xa *rxas1 = lst[i].items; | |
342 | rsync_xa *rxas2 = xalp->items; | |
343 | ||
344 | /* Wrong number of elements? */ | |
345 | if (lst[i].count != xalp->count) | |
346 | continue; | |
347 | /* any elements different? */ | |
348 | for (j = 0; j < xalp->count; j++) { | |
349 | if (rxas1[j].name_len != rxas2[j].name_len | |
350 | || rxas1[j].datum_len != rxas2[j].datum_len | |
351 | || strcmp(rxas1[j].name, rxas2[j].name)) | |
352 | break; | |
353 | if (rxas1[j].datum_len > MAX_FULL_DATUM) { | |
354 | if (memcmp(rxas1[j].datum + 1, | |
355 | rxas2[j].datum + 1, | |
356 | MAX_DIGEST_LEN) != 0) | |
357 | break; | |
358 | } else { | |
359 | if (memcmp(rxas1[j].datum, rxas2[j].datum, | |
360 | rxas2[j].datum_len)) | |
361 | break; | |
362 | } | |
363 | } | |
364 | /* no differences found. This is The One! */ | |
365 | if (j == xalp->count) | |
366 | return i; | |
367 | } | |
368 | ||
369 | return -1; | |
370 | } | |
371 | ||
372 | /* Store *xalp on the end of rsync_xal_l */ | |
373 | static void rsync_xal_store(item_list *xalp) | |
374 | { | |
375 | item_list *new_lst = EXPAND_ITEM_LIST(&rsync_xal_l, item_list, RSYNC_XAL_LIST_INITIAL); | |
376 | /* Since the following call starts a new list, we know it will hold the | |
377 | * entire initial-count, not just enough space for one new item. */ | |
378 | *new_lst = empty_xattr; | |
379 | (void)EXPAND_ITEM_LIST(new_lst, rsync_xa, xalp->count); | |
380 | memcpy(new_lst->items, xalp->items, xalp->count * sizeof (rsync_xa)); | |
381 | new_lst->count = xalp->count; | |
382 | xalp->count = 0; | |
383 | } | |
384 | ||
385 | /* Send the make_xattr()-generated xattr list for this flist entry. */ | |
13710874 | 386 | int send_xattr(stat_x *sxp, int f) |
16edf865 WD |
387 | { |
388 | int ndx = find_matching_xattr(sxp->xattr); | |
389 | ||
390 | /* Send 0 (-1 + 1) to indicate that literal xattr data follows. */ | |
f31514ad | 391 | write_varint(f, ndx + 1); |
16edf865 WD |
392 | |
393 | if (ndx < 0) { | |
394 | rsync_xa *rxa; | |
395 | int count = sxp->xattr->count; | |
f31514ad | 396 | write_varint(f, count); |
16edf865 | 397 | for (rxa = sxp->xattr->items; count--; rxa++) { |
b4e6aac9 | 398 | size_t name_len = rxa->name_len; |
d724dd18 WD |
399 | const char *name = rxa->name; |
400 | /* Strip the rsync prefix from disguised namespaces. */ | |
b4e6aac9 | 401 | if (name_len > RPRE_LEN |
16edf865 | 402 | #ifdef HAVE_LINUX_XATTRS |
b4e6aac9 | 403 | && am_root < 0 |
d724dd18 | 404 | #endif |
b4e6aac9 | 405 | && name[RPRE_LEN] != '%' && HAS_PREFIX(name, RSYNC_PREFIX)) { |
d724dd18 WD |
406 | name += RPRE_LEN; |
407 | name_len -= RPRE_LEN; | |
408 | } | |
409 | #ifndef HAVE_LINUX_XATTRS | |
410 | else { | |
411 | /* Put everything else in the user namespace. */ | |
412 | name_len += UPRE_LEN; | |
413 | } | |
414 | #endif | |
415 | write_varint(f, name_len); | |
f31514ad | 416 | write_varint(f, rxa->datum_len); |
d724dd18 WD |
417 | #ifndef HAVE_LINUX_XATTRS |
418 | if (name_len > rxa->name_len) { | |
16edf865 | 419 | write_buf(f, USER_PREFIX, UPRE_LEN); |
d724dd18 | 420 | name_len -= UPRE_LEN; |
16edf865 WD |
421 | } |
422 | #endif | |
d724dd18 | 423 | write_buf(f, name, name_len); |
16edf865 WD |
424 | if (rxa->datum_len > MAX_FULL_DATUM) |
425 | write_buf(f, rxa->datum + 1, MAX_DIGEST_LEN); | |
426 | else | |
427 | write_buf(f, rxa->datum, rxa->datum_len); | |
428 | } | |
429 | ndx = rsync_xal_l.count; /* pre-incremented count */ | |
430 | rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */ | |
431 | } | |
432 | ||
433 | return ndx; | |
434 | } | |
435 | ||
436 | /* Return a flag indicating if we need to change a file's xattrs. If | |
437 | * "find_all" is specified, also mark any abbreviated xattrs that we | |
438 | * need so that send_xattr_request() can tell the sender about them. */ | |
13710874 | 439 | int xattr_diff(struct file_struct *file, stat_x *sxp, int find_all) |
16edf865 WD |
440 | { |
441 | item_list *lst = rsync_xal_l.items; | |
442 | rsync_xa *snd_rxa, *rec_rxa; | |
443 | int snd_cnt, rec_cnt; | |
444 | int cmp, same, xattrs_equal = 1; | |
445 | ||
446 | if (sxp && XATTR_READY(*sxp)) { | |
447 | rec_rxa = sxp->xattr->items; | |
448 | rec_cnt = sxp->xattr->count; | |
449 | } else { | |
450 | rec_rxa = NULL; | |
451 | rec_cnt = 0; | |
452 | } | |
453 | ||
454 | if (F_XATTR(file) >= 0) | |
455 | lst += F_XATTR(file); | |
456 | else | |
457 | lst = &empty_xattr; | |
458 | ||
459 | snd_rxa = lst->items; | |
460 | snd_cnt = lst->count; | |
461 | ||
462 | /* If the count of the sender's xattrs is different from our | |
463 | * (receiver's) xattrs, the lists are not the same. */ | |
464 | if (snd_cnt != rec_cnt) { | |
465 | if (!find_all) | |
466 | return 1; | |
467 | xattrs_equal = 0; | |
468 | } | |
469 | ||
470 | while (snd_cnt) { | |
471 | cmp = rec_cnt ? strcmp(snd_rxa->name, rec_rxa->name) : -1; | |
472 | if (cmp > 0) | |
473 | same = 0; | |
474 | else if (snd_rxa->datum_len > MAX_FULL_DATUM) { | |
475 | same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len | |
476 | && memcmp(snd_rxa->datum + 1, rec_rxa->datum + 1, | |
477 | MAX_DIGEST_LEN) == 0; | |
478 | /* Flag unrequested items that we need. */ | |
479 | if (!same && find_all && snd_rxa->datum[0] == XSTATE_ABBREV) | |
480 | snd_rxa->datum[0] = XSTATE_TODO; | |
481 | } else { | |
482 | same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len | |
483 | && memcmp(snd_rxa->datum, rec_rxa->datum, | |
484 | snd_rxa->datum_len) == 0; | |
485 | } | |
486 | if (!same) { | |
487 | if (!find_all) | |
488 | return 1; | |
489 | xattrs_equal = 0; | |
490 | } | |
491 | ||
492 | if (cmp <= 0) { | |
493 | snd_rxa++; | |
494 | snd_cnt--; | |
495 | } | |
496 | if (cmp >= 0) { | |
497 | rec_rxa++; | |
498 | rec_cnt--; | |
499 | } | |
500 | } | |
501 | ||
502 | if (rec_cnt) | |
503 | xattrs_equal = 0; | |
504 | ||
505 | return !xattrs_equal; | |
506 | } | |
507 | ||
7462c6ac WD |
508 | /* When called by the generator (with a NULL fname), this tells the sender |
509 | * all the abbreviated xattr values we need. When called by the sender | |
510 | * (with a non-NULL fname), we send all the extra xattr data it needs. | |
511 | * The generator may also call with f_out < 0 to just change all the | |
512 | * XSTATE_ABBREV states into XSTATE_DONE. */ | |
16edf865 WD |
513 | void send_xattr_request(const char *fname, struct file_struct *file, int f_out) |
514 | { | |
515 | item_list *lst = rsync_xal_l.items; | |
68ddbaf6 | 516 | int cnt, prior_req = 0; |
16edf865 WD |
517 | rsync_xa *rxa; |
518 | ||
519 | lst += F_XATTR(file); | |
68ddbaf6 | 520 | for (rxa = lst->items, cnt = lst->count; cnt--; rxa++) { |
16edf865 WD |
521 | if (rxa->datum_len <= MAX_FULL_DATUM) |
522 | continue; | |
523 | switch (rxa->datum[0]) { | |
b769ad6a WD |
524 | case XSTATE_ABBREV: |
525 | /* Items left abbreviated matched the sender's checksum, so | |
526 | * the receiver will cache the local data for future use. */ | |
527 | if (am_generator) | |
528 | rxa->datum[0] = XSTATE_DONE; | |
16edf865 WD |
529 | continue; |
530 | case XSTATE_TODO: | |
7462c6ac | 531 | assert(f_out >= 0); |
16edf865 WD |
532 | break; |
533 | default: | |
534 | continue; | |
535 | } | |
536 | ||
537 | /* Flag that we handled this abbreviated item. */ | |
538 | rxa->datum[0] = XSTATE_DONE; | |
539 | ||
68ddbaf6 WD |
540 | write_varint(f_out, rxa->num - prior_req); |
541 | prior_req = rxa->num; | |
16edf865 WD |
542 | |
543 | if (fname) { | |
544 | size_t len = 0; | |
545 | char *ptr; | |
546 | ||
547 | /* Re-read the long datum. */ | |
a685271d WD |
548 | if (!(ptr = get_xattr_data(fname, rxa->name, &len, 0))) { |
549 | rprintf(FERROR_XFER, "failed to re-read xattr %s for %s\n", rxa->name, fname); | |
550 | write_varint(f_out, 0); | |
16edf865 | 551 | continue; |
a685271d | 552 | } |
16edf865 | 553 | |
f31514ad | 554 | write_varint(f_out, len); /* length might have changed! */ |
16edf865 WD |
555 | write_buf(f_out, ptr, len); |
556 | free(ptr); | |
557 | } | |
558 | } | |
559 | ||
7462c6ac WD |
560 | if (f_out >= 0) |
561 | write_byte(f_out, 0); /* end the list */ | |
16edf865 WD |
562 | } |
563 | ||
16edf865 WD |
564 | /* When called by the sender, read the request from the generator and mark |
565 | * any needed xattrs with a flag that lets us know they need to be sent to | |
566 | * the receiver. When called by the receiver, reads the sent data and | |
567 | * stores it in place of its checksum. */ | |
e107b6b1 | 568 | int recv_xattr_request(struct file_struct *file, int f_in) |
16edf865 WD |
569 | { |
570 | item_list *lst = rsync_xal_l.items; | |
571 | char *old_datum, *name; | |
572 | rsync_xa *rxa; | |
68ddbaf6 | 573 | int rel_pos, cnt, num, got_xattr_data = 0; |
16edf865 WD |
574 | |
575 | if (F_XATTR(file) < 0) { | |
576 | rprintf(FERROR, "recv_xattr_request: internal data error!\n"); | |
577 | exit_cleanup(RERR_STREAMIO); | |
578 | } | |
579 | lst += F_XATTR(file); | |
580 | ||
581 | cnt = lst->count; | |
582 | rxa = lst->items; | |
68ddbaf6 | 583 | num = 0; |
f31514ad | 584 | while ((rel_pos = read_varint(f_in)) != 0) { |
68ddbaf6 WD |
585 | num += rel_pos; |
586 | while (cnt && rxa->num < num) { | |
587 | rxa++; | |
588 | cnt--; | |
589 | } | |
590 | if (!cnt || rxa->num != num) { | |
591 | rprintf(FERROR, "[%s] could not find xattr #%d for %s\n", | |
592 | who_am_i(), num, f_name(file, NULL)); | |
593 | exit_cleanup(RERR_STREAMIO); | |
594 | } | |
6283e9ef | 595 | if (!XATTR_ABBREV(*rxa) || rxa->datum[0] != XSTATE_ABBREV) { |
e424e261 WD |
596 | rprintf(FERROR, "[%s] internal abbrev error on %s (%s, len=%ld)!\n", |
597 | who_am_i(), f_name(file, NULL), rxa->name, (long)rxa->datum_len); | |
16edf865 WD |
598 | exit_cleanup(RERR_STREAMIO); |
599 | } | |
600 | ||
601 | if (am_sender) { | |
602 | rxa->datum[0] = XSTATE_TODO; | |
603 | continue; | |
604 | } | |
605 | ||
606 | old_datum = rxa->datum; | |
f31514ad | 607 | rxa->datum_len = read_varint(f_in); |
16edf865 WD |
608 | |
609 | if (rxa->name_len + rxa->datum_len < rxa->name_len) | |
774d1c36 | 610 | overflow_exit("recv_xattr_request"); |
16edf865 WD |
611 | rxa->datum = new_array(char, rxa->datum_len + rxa->name_len); |
612 | if (!rxa->datum) | |
613 | out_of_memory("recv_xattr_request"); | |
614 | name = rxa->datum + rxa->datum_len; | |
615 | memcpy(name, rxa->name, rxa->name_len); | |
616 | rxa->name = name; | |
617 | free(old_datum); | |
618 | read_buf(f_in, rxa->datum, rxa->datum_len); | |
e107b6b1 | 619 | got_xattr_data = 1; |
16edf865 | 620 | } |
e107b6b1 WD |
621 | |
622 | return got_xattr_data; | |
16edf865 WD |
623 | } |
624 | ||
625 | /* ------------------------------------------------------------------------- */ | |
626 | ||
627 | /* receive and build the rsync_xattr_lists */ | |
628 | void receive_xattr(struct file_struct *file, int f) | |
629 | { | |
630 | static item_list temp_xattr = EMPTY_ITEM_LIST; | |
68ddbaf6 | 631 | int count, num; |
d724dd18 WD |
632 | #ifdef HAVE_LINUX_XATTRS |
633 | int need_sort = 0; | |
634 | #else | |
635 | int need_sort = 1; | |
636 | #endif | |
f31514ad | 637 | int ndx = read_varint(f); |
16edf865 WD |
638 | |
639 | if (ndx < 0 || (size_t)ndx > rsync_xal_l.count) { | |
640 | rprintf(FERROR, "receive_xattr: xa index %d out of" | |
641 | " range for %s\n", ndx, f_name(file, NULL)); | |
642 | exit_cleanup(RERR_STREAMIO); | |
643 | } | |
644 | ||
645 | if (ndx != 0) { | |
646 | F_XATTR(file) = ndx - 1; | |
647 | return; | |
648 | } | |
649 | ||
f31514ad | 650 | if ((count = read_varint(f)) != 0) { |
16edf865 WD |
651 | (void)EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count); |
652 | temp_xattr.count = 0; | |
653 | } | |
654 | ||
68ddbaf6 | 655 | for (num = 1; num <= count; num++) { |
16edf865 WD |
656 | char *ptr, *name; |
657 | rsync_xa *rxa; | |
f31514ad WD |
658 | size_t name_len = read_varint(f); |
659 | size_t datum_len = read_varint(f); | |
16edf865 | 660 | size_t dget_len = datum_len > MAX_FULL_DATUM ? 1 + MAX_DIGEST_LEN : datum_len; |
9439c0cb | 661 | size_t extra_len = MIGHT_NEED_RPRE ? RPRE_LEN : 0; |
774d1c36 WD |
662 | if ((dget_len + extra_len < dget_len) |
663 | || (dget_len + extra_len + name_len < dget_len)) | |
664 | overflow_exit("receive_xattr"); | |
16edf865 WD |
665 | ptr = new_array(char, dget_len + extra_len + name_len); |
666 | if (!ptr) | |
667 | out_of_memory("receive_xattr"); | |
668 | name = ptr + dget_len + extra_len; | |
669 | read_buf(f, name, name_len); | |
670 | if (dget_len == datum_len) | |
671 | read_buf(f, ptr, dget_len); | |
672 | else { | |
673 | *ptr = XSTATE_ABBREV; | |
674 | read_buf(f, ptr + 1, MAX_DIGEST_LEN); | |
675 | } | |
676 | #ifdef HAVE_LINUX_XATTRS | |
677 | /* Non-root can only save the user namespace. */ | |
68ddbaf6 WD |
678 | if (am_root <= 0 && !HAS_PREFIX(name, USER_PREFIX)) { |
679 | if (!am_root) { | |
680 | free(ptr); | |
681 | continue; | |
682 | } | |
683 | name -= RPRE_LEN; | |
684 | name_len += RPRE_LEN; | |
685 | memcpy(name, RSYNC_PREFIX, RPRE_LEN); | |
d724dd18 | 686 | need_sort = 1; |
16edf865 WD |
687 | } |
688 | #else | |
689 | /* This OS only has a user namespace, so we either | |
690 | * strip the user prefix, or we put a non-user | |
691 | * namespace inside our rsync hierarchy. */ | |
692 | if (HAS_PREFIX(name, USER_PREFIX)) { | |
693 | name += UPRE_LEN; | |
694 | name_len -= UPRE_LEN; | |
695 | } else if (am_root) { | |
696 | name -= RPRE_LEN; | |
697 | name_len += RPRE_LEN; | |
698 | memcpy(name, RSYNC_PREFIX, RPRE_LEN); | |
699 | } else { | |
700 | free(ptr); | |
701 | continue; | |
702 | } | |
703 | #endif | |
524eaa82 WD |
704 | /* No rsync.%FOO attributes are copied w/o 2 -X options. */ |
705 | if (preserve_xattrs < 2 && name_len > RPRE_LEN | |
706 | && name[RPRE_LEN] == '%' && HAS_PREFIX(name, RSYNC_PREFIX)) { | |
9439c0cb WD |
707 | free(ptr); |
708 | continue; | |
709 | } | |
16edf865 WD |
710 | rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, 1); |
711 | rxa->name = name; | |
712 | rxa->datum = ptr; | |
713 | rxa->name_len = name_len; | |
714 | rxa->datum_len = datum_len; | |
68ddbaf6 | 715 | rxa->num = num; |
16edf865 WD |
716 | } |
717 | ||
d724dd18 WD |
718 | if (need_sort && count > 1) |
719 | qsort(temp_xattr.items, count, sizeof (rsync_xa), rsync_xal_compare_names); | |
720 | ||
16edf865 WD |
721 | ndx = rsync_xal_l.count; /* pre-incremented count */ |
722 | rsync_xal_store(&temp_xattr); /* adds item to rsync_xal_l */ | |
723 | ||
724 | F_XATTR(file) = ndx; | |
725 | } | |
726 | ||
13710874 | 727 | /* Turn the xattr data in stat_x into cached xattr data, setting the index |
16edf865 | 728 | * values in the file struct. */ |
ea53d161 | 729 | void cache_tmp_xattr(struct file_struct *file, stat_x *sxp) |
16edf865 WD |
730 | { |
731 | int ndx; | |
732 | ||
733 | if (!sxp->xattr) | |
734 | return; | |
735 | ||
ea53d161 WD |
736 | if (prior_xattr_count == (size_t)-1) |
737 | prior_xattr_count = rsync_xal_l.count; | |
16edf865 WD |
738 | ndx = find_matching_xattr(sxp->xattr); |
739 | if (ndx < 0) | |
740 | rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */ | |
741 | ||
742 | F_XATTR(file) = ndx; | |
743 | } | |
744 | ||
ea53d161 WD |
745 | void uncache_tmp_xattrs(void) |
746 | { | |
747 | if (prior_xattr_count != (size_t)-1) { | |
748 | item_list *xattr_item = rsync_xal_l.items; | |
749 | item_list *xattr_start = xattr_item + prior_xattr_count; | |
750 | xattr_item += rsync_xal_l.count; | |
751 | rsync_xal_l.count = prior_xattr_count; | |
752 | while (xattr_item-- > xattr_start) { | |
753 | rsync_xal_free(xattr_item); | |
754 | free(xattr_item); | |
755 | } | |
756 | prior_xattr_count = (size_t)-1; | |
757 | } | |
758 | } | |
759 | ||
16edf865 | 760 | static int rsync_xal_set(const char *fname, item_list *xalp, |
13710874 | 761 | const char *fnamecmp, stat_x *sxp) |
16edf865 WD |
762 | { |
763 | rsync_xa *rxas = xalp->items; | |
764 | ssize_t list_len; | |
765 | size_t i, len; | |
766 | char *name, *ptr, sum[MAX_DIGEST_LEN]; | |
581c830c WD |
767 | #ifdef HAVE_LINUX_XATTRS |
768 | int user_only = am_root <= 0; | |
769 | #endif | |
b4e6aac9 WD |
770 | size_t name_len; |
771 | int ret = 0; | |
16edf865 WD |
772 | |
773 | /* This puts the current name list into the "namebuf" buffer. */ | |
774 | if ((list_len = get_xattr_names(fname)) < 0) | |
775 | return -1; | |
776 | ||
777 | for (i = 0; i < xalp->count; i++) { | |
778 | name = rxas[i].name; | |
779 | ||
780 | if (XATTR_ABBREV(rxas[i])) { | |
781 | /* See if the fnamecmp version is identical. */ | |
782 | len = name_len = rxas[i].name_len; | |
783 | if ((ptr = get_xattr_data(fnamecmp, name, &len, 1)) == NULL) { | |
784 | still_abbrev: | |
785 | if (am_generator) | |
786 | continue; | |
787 | rprintf(FERROR, "Missing abbreviated xattr value, %s, for %s\n", | |
788 | rxas[i].name, full_fname(fname)); | |
789 | ret = -1; | |
790 | continue; | |
791 | } | |
792 | if (len != rxas[i].datum_len) { | |
793 | free(ptr); | |
794 | goto still_abbrev; | |
795 | } | |
796 | ||
797 | sum_init(checksum_seed); | |
798 | sum_update(ptr, len); | |
799 | sum_end(sum); | |
800 | if (memcmp(sum, rxas[i].datum + 1, MAX_DIGEST_LEN) != 0) { | |
801 | free(ptr); | |
802 | goto still_abbrev; | |
803 | } | |
804 | ||
805 | if (fname == fnamecmp) | |
806 | ; /* Value is already set when identical */ | |
807 | else if (sys_lsetxattr(fname, name, ptr, len) < 0) { | |
3f0211b6 | 808 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
809 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", |
810 | fname, name); | |
811 | ret = -1; | |
812 | } else /* make sure caller sets mtime */ | |
813 | sxp->st.st_mtime = (time_t)-1; | |
814 | ||
815 | if (am_generator) { /* generator items stay abbreviated */ | |
16edf865 WD |
816 | free(ptr); |
817 | continue; | |
818 | } | |
819 | ||
820 | memcpy(ptr + len, name, name_len); | |
821 | free(rxas[i].datum); | |
822 | ||
823 | rxas[i].name = name = ptr + len; | |
824 | rxas[i].datum = ptr; | |
825 | continue; | |
826 | } | |
827 | ||
828 | if (sys_lsetxattr(fname, name, rxas[i].datum, rxas[i].datum_len) < 0) { | |
3f0211b6 | 829 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
830 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", |
831 | fname, name); | |
832 | ret = -1; | |
833 | } else /* make sure caller sets mtime */ | |
834 | sxp->st.st_mtime = (time_t)-1; | |
835 | } | |
836 | ||
837 | /* Remove any extraneous names. */ | |
838 | for (name = namebuf; list_len > 0; name += name_len) { | |
839 | name_len = strlen(name) + 1; | |
840 | list_len -= name_len; | |
841 | ||
842 | #ifdef HAVE_LINUX_XATTRS | |
843 | /* We always ignore the system namespace, and non-root | |
844 | * ignores everything but the user namespace. */ | |
581c830c WD |
845 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) |
846 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
16edf865 WD |
847 | continue; |
848 | #endif | |
e107b6b1 WD |
849 | if (am_root < 0 && name_len > RPRE_LEN |
850 | && name[RPRE_LEN] == '%' && strcmp(name, XSTAT_ATTR) == 0) | |
851 | continue; | |
16edf865 WD |
852 | |
853 | for (i = 0; i < xalp->count; i++) { | |
854 | if (strcmp(name, rxas[i].name) == 0) | |
855 | break; | |
856 | } | |
857 | if (i == xalp->count) { | |
858 | if (sys_lremovexattr(fname, name) < 0) { | |
3f0211b6 | 859 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
860 | "rsync_xal_clear: lremovexattr(\"%s\",\"%s\") failed", |
861 | fname, name); | |
862 | ret = -1; | |
863 | } else /* make sure caller sets mtime */ | |
864 | sxp->st.st_mtime = (time_t)-1; | |
865 | } | |
866 | } | |
867 | ||
868 | return ret; | |
869 | } | |
870 | ||
871 | /* Set extended attributes on indicated filename. */ | |
872 | int set_xattr(const char *fname, const struct file_struct *file, | |
13710874 | 873 | const char *fnamecmp, stat_x *sxp) |
16edf865 WD |
874 | { |
875 | int ndx; | |
876 | item_list *lst = rsync_xal_l.items; | |
877 | ||
878 | if (dry_run) | |
879 | return 1; /* FIXME: --dry-run needs to compute this value */ | |
880 | ||
881 | if (read_only || list_only) { | |
882 | errno = EROFS; | |
883 | return -1; | |
884 | } | |
885 | ||
886 | ndx = F_XATTR(file); | |
887 | return rsync_xal_set(fname, lst + ndx, fnamecmp, sxp); | |
888 | } | |
889 | ||
7ed6bc53 WD |
890 | #ifdef SUPPORT_ACLS |
891 | char *get_xattr_acl(const char *fname, int is_access_acl, size_t *len_p) | |
892 | { | |
893 | const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR; | |
e516b69e | 894 | *len_p = 0; /* no extra data alloc needed from get_xattr_data() */ |
7ed6bc53 WD |
895 | return get_xattr_data(fname, name, len_p, 1); |
896 | } | |
897 | ||
898 | int set_xattr_acl(const char *fname, int is_access_acl, const char *buf, size_t buf_len) | |
899 | { | |
900 | const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR; | |
901 | if (sys_lsetxattr(fname, name, buf, buf_len) < 0) { | |
3f0211b6 | 902 | rsyserr(FERROR_XFER, errno, |
7ed6bc53 WD |
903 | "set_xattr_acl: lsetxattr(\"%s\",\"%s\") failed", |
904 | fname, name); | |
905 | return -1; | |
906 | } | |
907 | return 0; | |
908 | } | |
909 | ||
910 | int del_def_xattr_acl(const char *fname) | |
911 | { | |
912 | return sys_lremovexattr(fname, XDEF_ACL_ATTR); | |
913 | } | |
914 | #endif | |
915 | ||
9439c0cb WD |
916 | int get_stat_xattr(const char *fname, int fd, STRUCT_STAT *fst, STRUCT_STAT *xst) |
917 | { | |
918 | int mode, rdev_major, rdev_minor, uid, gid, len; | |
919 | char buf[256]; | |
920 | ||
921 | if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode)) | |
922 | return -1; | |
923 | ||
924 | if (xst) | |
925 | *xst = *fst; | |
926 | else | |
927 | xst = fst; | |
928 | if (fname) { | |
929 | fd = -1; | |
930 | len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1); | |
931 | } else { | |
932 | fname = "fd"; | |
933 | len = sys_fgetxattr(fd, XSTAT_ATTR, buf, sizeof buf - 1); | |
934 | } | |
935 | if (len >= (int)sizeof buf) { | |
936 | len = -1; | |
937 | errno = ERANGE; | |
938 | } | |
939 | if (len < 0) { | |
940 | if (errno == ENOTSUP || errno == ENOATTR) | |
941 | return -1; | |
942 | if (errno == EPERM && S_ISLNK(fst->st_mode)) { | |
943 | xst->st_uid = 0; | |
944 | xst->st_gid = 0; | |
945 | return 0; | |
946 | } | |
3f0211b6 | 947 | rsyserr(FERROR_XFER, errno, "failed to read xattr %s for %s", |
9439c0cb WD |
948 | XSTAT_ATTR, full_fname(fname)); |
949 | return -1; | |
950 | } | |
951 | buf[len] = '\0'; | |
952 | ||
953 | if (sscanf(buf, "%o %d,%d %d:%d", | |
954 | &mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) { | |
955 | rprintf(FERROR, "Corrupt %s xattr attached to %s: \"%s\"\n", | |
956 | XSTAT_ATTR, full_fname(fname), buf); | |
957 | exit_cleanup(RERR_FILEIO); | |
958 | } | |
959 | ||
960 | xst->st_mode = from_wire_mode(mode); | |
961 | xst->st_rdev = MAKEDEV(rdev_major, rdev_minor); | |
962 | xst->st_uid = uid; | |
963 | xst->st_gid = gid; | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
e107b6b1 | 968 | int set_stat_xattr(const char *fname, struct file_struct *file, mode_t new_mode) |
9439c0cb WD |
969 | { |
970 | STRUCT_STAT fst, xst; | |
971 | dev_t rdev; | |
972 | mode_t mode, fmode; | |
973 | ||
974 | if (dry_run) | |
975 | return 0; | |
976 | ||
977 | if (read_only || list_only) { | |
3f0211b6 | 978 | rsyserr(FERROR_XFER, EROFS, "failed to write xattr %s for %s", |
9439c0cb WD |
979 | XSTAT_ATTR, full_fname(fname)); |
980 | return -1; | |
981 | } | |
982 | ||
983 | if (x_lstat(fname, &fst, &xst) < 0) { | |
3f0211b6 | 984 | rsyserr(FERROR_XFER, errno, "failed to re-stat %s", |
9439c0cb WD |
985 | full_fname(fname)); |
986 | return -1; | |
987 | } | |
988 | ||
989 | fst.st_mode &= (_S_IFMT | CHMOD_BITS); | |
e107b6b1 | 990 | fmode = new_mode & (_S_IFMT | CHMOD_BITS); |
9439c0cb | 991 | |
4640ae85 | 992 | if (IS_DEVICE(fmode)) { |
9439c0cb WD |
993 | uint32 *devp = F_RDEV_P(file); |
994 | rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)); | |
995 | } else | |
996 | rdev = 0; | |
997 | ||
998 | /* Dump the special permissions and enable full owner access. */ | |
999 | mode = (fst.st_mode & _S_IFMT) | (fmode & ACCESSPERMS) | |
1000 | | (S_ISDIR(fst.st_mode) ? 0700 : 0600); | |
1001 | if (fst.st_mode != mode) | |
1002 | do_chmod(fname, mode); | |
4640ae85 | 1003 | if (!IS_DEVICE(fst.st_mode)) |
9439c0cb WD |
1004 | fst.st_rdev = 0; /* just in case */ |
1005 | ||
1006 | if (mode == fmode && fst.st_rdev == rdev | |
fb7b9ddc | 1007 | && fst.st_uid == F_OWNER(file) && fst.st_gid == F_GROUP(file)) { |
9439c0cb WD |
1008 | /* xst.st_mode will be 0 if there's no current stat xattr */ |
1009 | if (xst.st_mode && sys_lremovexattr(fname, XSTAT_ATTR) < 0) { | |
3f0211b6 | 1010 | rsyserr(FERROR_XFER, errno, |
9439c0cb WD |
1011 | "delete of stat xattr failed for %s", |
1012 | full_fname(fname)); | |
1013 | return -1; | |
1014 | } | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | if (xst.st_mode != fmode || xst.st_rdev != rdev | |
fb7b9ddc | 1019 | || xst.st_uid != F_OWNER(file) || xst.st_gid != F_GROUP(file)) { |
9439c0cb WD |
1020 | char buf[256]; |
1021 | int len = snprintf(buf, sizeof buf, "%o %u,%u %u:%u", | |
1022 | to_wire_mode(fmode), | |
1023 | (int)major(rdev), (int)minor(rdev), | |
fb7b9ddc | 1024 | F_OWNER(file), F_GROUP(file)); |
9439c0cb WD |
1025 | if (sys_lsetxattr(fname, XSTAT_ATTR, buf, len) < 0) { |
1026 | if (errno == EPERM && S_ISLNK(fst.st_mode)) | |
1027 | return 0; | |
3f0211b6 | 1028 | rsyserr(FERROR_XFER, errno, |
9439c0cb WD |
1029 | "failed to write xattr %s for %s", |
1030 | XSTAT_ATTR, full_fname(fname)); | |
1031 | return -1; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | int x_stat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1039 | { | |
1040 | int ret = do_stat(fname, fst); | |
1041 | if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst) | |
1042 | xst->st_mode = 0; | |
1043 | return ret; | |
1044 | } | |
1045 | ||
1046 | int x_lstat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1047 | { | |
1048 | int ret = do_lstat(fname, fst); | |
1049 | if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst) | |
1050 | xst->st_mode = 0; | |
1051 | return ret; | |
1052 | } | |
1053 | ||
1054 | int x_fstat(int fd, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1055 | { | |
1056 | int ret = do_fstat(fd, fst); | |
1057 | if ((ret < 0 || get_stat_xattr(NULL, fd, fst, xst) < 0) && xst) | |
1058 | xst->st_mode = 0; | |
1059 | return ret; | |
1060 | } | |
1061 | ||
16edf865 | 1062 | #endif /* SUPPORT_XATTRS */ |