1 /*
2 * Copyright (c) 1999 Adrian Sun (asun@u.washington.edu)
3 * Copyright (c) 1990,1991 Regents of The University of Michigan.
4 * Copyright (c) 2010 Frank Lahm
5 *
6 * All Rights Reserved.
7 *
8 * Permission to use, copy, modify, and distribute this software and
9 * its documentation for any purpose and without fee is hereby granted,
10 * provided that the above copyright notice appears in all copies and
11 * that both that copyright notice and this permission notice appear
12 * in supporting documentation, and that the name of The University
13 * of Michigan not be used in advertising or publicity pertaining to
14 * distribution of the software without specific, written prior
15 * permission. This software is supplied as is without expressed or
16 * implied warranties of any kind.
17 *
18 * Research Systems Unix Group
19 * The University of Michigan
20 * c/o Mike Clark
21 * 535 W. William Street
22 * Ann Arbor, Michigan
23 * +1-313-763-0525
24 * netatalk@itd.umich.edu
25 *
26 */
27
28 /*!
29 * @file
30 * Part of Netatalk's AppleDouble implementatation
31 * @sa include/atalk/adouble.h
32 */
33
34 #ifdef HAVE_CONFIG_H
35 #include "config.h"
36 #endif /* HAVE_CONFIG_H */
37
38 #include <errno.h>
39 #include <sys/param.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <stdarg.h>
43 #include <arpa/inet.h>
44
45 #include <atalk/logger.h>
46 #include <atalk/adouble.h>
47 #include <atalk/util.h>
48 #include <atalk/unix.h>
49 #include <atalk/ea.h>
50 #include <atalk/bstrlib.h>
51 #include <atalk/bstradd.h>
52 #include <atalk/compat.h>
53 #include <atalk/errchk.h>
54 #include <atalk/volume.h>
55
56 #include "ad_lock.h"
57
58 #define ADEDOFF_MAGIC (0)
59 #define ADEDOFF_VERSION (ADEDOFF_MAGIC + ADEDLEN_MAGIC)
60 #define ADEDOFF_FILLER (ADEDOFF_VERSION + ADEDLEN_VERSION)
61 #define ADEDOFF_NENTRIES (ADEDOFF_FILLER + ADEDLEN_FILLER)
62
63 /* initial lengths of some of the fields */
64 #define ADEDLEN_INIT 0
65
66 /* i stick things in a slightly different order than their eid order in
67 * case i ever want to separate RootInfo behaviour from the rest of the
68 * stuff. */
69
70 /* ad:v2 */
71 #define ADEDOFF_NAME_V2 (AD_HEADER_LEN + ADEID_NUM_V2*AD_ENTRY_LEN)
72 #define ADEDOFF_COMMENT_V2 (ADEDOFF_NAME_V2 + ADEDLEN_NAME)
73 #define ADEDOFF_FILEDATESI (ADEDOFF_COMMENT_V2 + ADEDLEN_COMMENT)
74 #define ADEDOFF_FINDERI_V2 (ADEDOFF_FILEDATESI + ADEDLEN_FILEDATESI)
75 #define ADEDOFF_DID (ADEDOFF_FINDERI_V2 + ADEDLEN_FINDERI)
76 #define ADEDOFF_AFPFILEI (ADEDOFF_DID + ADEDLEN_DID)
77 #define ADEDOFF_SHORTNAME (ADEDOFF_AFPFILEI + ADEDLEN_AFPFILEI)
78 #define ADEDOFF_PRODOSFILEI (ADEDOFF_SHORTNAME + ADEDLEN_SHORTNAME)
79 #define ADEDOFF_PRIVDEV (ADEDOFF_PRODOSFILEI + ADEDLEN_PRODOSFILEI)
80 #define ADEDOFF_PRIVINO (ADEDOFF_PRIVDEV + ADEDLEN_PRIVDEV)
81 #define ADEDOFF_PRIVSYN (ADEDOFF_PRIVINO + ADEDLEN_PRIVINO)
82 #define ADEDOFF_PRIVID (ADEDOFF_PRIVSYN + ADEDLEN_PRIVSYN)
83 #define ADEDOFF_RFORK_V2 (ADEDOFF_PRIVID + ADEDLEN_PRIVID)
84
85 /* ad:ea */
86 #define ADEDOFF_FINDERI_EA (AD_HEADER_LEN + ADEID_NUM_EA * AD_ENTRY_LEN)
87 #define ADEDOFF_COMMENT_EA (ADEDOFF_FINDERI_EA + ADEDLEN_FINDERI)
88 #define ADEDOFF_FILEDATESI_EA (ADEDOFF_COMMENT_EA + ADEDLEN_COMMENT)
89 #define ADEDOFF_AFPFILEI_EA (ADEDOFF_FILEDATESI_EA + ADEDLEN_FILEDATESI)
90 #define ADEDOFF_PRIVDEV_EA (ADEDOFF_AFPFILEI_EA + ADEDLEN_AFPFILEI)
91 #define ADEDOFF_PRIVINO_EA (ADEDOFF_PRIVDEV_EA + ADEDLEN_PRIVDEV)
92 #define ADEDOFF_PRIVSYN_EA (ADEDOFF_PRIVINO_EA + ADEDLEN_PRIVINO)
93 #define ADEDOFF_PRIVID_EA (ADEDOFF_PRIVSYN_EA + ADEDLEN_PRIVSYN)
94
95 /* this is to prevent changing timezones from causing problems with
96 localtime volumes. the screw-up is 30 years. we use a delta of 5 years */
97 #define TIMEWARP_DELTA 157680000
98
99 struct entry {
100 uint32_t id, offset, len;
101 };
102
103 /* --------------------------- */
104 static uid_t default_uid = -1;
105
106 /* Forward declarations */
107 static int ad_mkrf(const char *path);
108 static int ad_header_read(const char *path, struct adouble *ad, const struct stat *hst);
109 static int ad_header_upgrade(struct adouble *ad, const char *name);
110
111 #ifdef HAVE_EAFD
112 static int ad_mkrf_ea(const char *path);
113 #endif
114 static int ad_header_read_ea(const char *path, struct adouble *ad, const struct stat *hst);
115 static int ad_header_upgrade_ea(struct adouble *ad, const char *name);
116 off_t ad_reso_size(const char *path, int adflags, struct adouble *ad);
117 static int ad_mkrf_osx(const char *path);
118
119
120 static struct adouble_fops ad_adouble = {
121 &ad_path,
122 &ad_mkrf,
123 &ad_rebuild_adouble_header_v2,
124 &ad_header_read,
125 &ad_header_upgrade,
126 };
127
128 static struct adouble_fops ad_adouble_ea = {
129 #ifdef HAVE_EAFD
130 &ad_path_ea,
131 &ad_mkrf_ea,
132 #else
133 &ad_path_osx,
134 &ad_mkrf_osx,
135 #endif
136 &ad_rebuild_adouble_header_ea,
137 &ad_header_read_ea,
138 &ad_header_upgrade_ea,
139 };
140
141 static const struct entry entry_order2[ADEID_NUM_V2 + 1] = {
142 {ADEID_NAME, ADEDOFF_NAME_V2, ADEDLEN_INIT},
143 {ADEID_COMMENT, ADEDOFF_COMMENT_V2, ADEDLEN_INIT},
144 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI, ADEDLEN_FILEDATESI},
145 {ADEID_FINDERI, ADEDOFF_FINDERI_V2, ADEDLEN_FINDERI},
146 {ADEID_DID, ADEDOFF_DID, ADEDLEN_DID},
147 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI, ADEDLEN_AFPFILEI},
148 {ADEID_SHORTNAME, ADEDOFF_SHORTNAME, ADEDLEN_INIT},
149 {ADEID_PRODOSFILEI, ADEDOFF_PRODOSFILEI, ADEDLEN_PRODOSFILEI},
150 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV, ADEDLEN_INIT},
151 {ADEID_PRIVINO, ADEDOFF_PRIVINO, ADEDLEN_INIT},
152 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN, ADEDLEN_INIT},
153 {ADEID_PRIVID, ADEDOFF_PRIVID, ADEDLEN_INIT},
154 {ADEID_RFORK, ADEDOFF_RFORK_V2, ADEDLEN_INIT},
155 {0, 0, 0}
156 };
157
158 /* Using Extended Attributes */
159 static const struct entry entry_order_ea[ADEID_NUM_EA + 1] = {
160 {ADEID_FINDERI, ADEDOFF_FINDERI_EA, ADEDLEN_FINDERI},
161 {ADEID_COMMENT, ADEDOFF_COMMENT_EA, ADEDLEN_INIT},
162 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI_EA, ADEDLEN_FILEDATESI},
163 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI_EA, ADEDLEN_AFPFILEI},
164 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV_EA, ADEDLEN_INIT},
165 {ADEID_PRIVINO, ADEDOFF_PRIVINO_EA, ADEDLEN_INIT},
166 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN_EA, ADEDLEN_INIT},
167 {ADEID_PRIVID, ADEDOFF_PRIVID_EA, ADEDLEN_INIT},
168 {0, 0, 0}
169 };
170
171 #define ADFLAGS2LOGSTRBUFSIZ 128
adflags2logstr(int adflags)172 const char *adflags2logstr(int adflags)
173 {
174 int first = 1;
175 static char buf[ADFLAGS2LOGSTRBUFSIZ];
176
177 buf[0] = 0;
178
179 if (adflags & ADFLAGS_DF) {
180 strlcat(buf, "DF", ADFLAGS2LOGSTRBUFSIZ);
181 first = 0;
182 }
183 if (adflags & ADFLAGS_RF) {
184 if (!first)
185 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
186 strlcat(buf, "RF", ADFLAGS2LOGSTRBUFSIZ);
187 first = 0;
188 }
189 if (adflags & ADFLAGS_NORF) {
190 if (!first)
191 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
192 strlcat(buf, "NORF", ADFLAGS2LOGSTRBUFSIZ);
193 first = 0;
194 }
195 if (adflags & ADFLAGS_HF) {
196 if (!first)
197 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
198 strlcat(buf, "HF", ADFLAGS2LOGSTRBUFSIZ);
199 first = 0;
200 }
201 if (adflags & ADFLAGS_NOHF) {
202 if (!first)
203 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
204 strlcat(buf, "NOHF", ADFLAGS2LOGSTRBUFSIZ);
205 first = 0;
206 }
207 if (adflags & ADFLAGS_DIR) {
208 if (!first)
209 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
210 strlcat(buf, "DIR", ADFLAGS2LOGSTRBUFSIZ);
211 first = 0;
212 }
213 if (adflags & ADFLAGS_CHECK_OF) {
214 if (!first)
215 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
216 strlcat(buf, "OF", ADFLAGS2LOGSTRBUFSIZ);
217 first = 0;
218 }
219 if (adflags & ADFLAGS_SETSHRMD) {
220 if (!first)
221 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
222 strlcat(buf, "SHRMD", ADFLAGS2LOGSTRBUFSIZ);
223 first = 0;
224 }
225 if (adflags & ADFLAGS_RDWR) {
226 if (!first)
227 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
228 strlcat(buf, "O_RDWR", ADFLAGS2LOGSTRBUFSIZ);
229 first = 0;
230 }
231 if (adflags & ADFLAGS_RDONLY) {
232 if (!first)
233 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
234 strlcat(buf, "O_RDONLY", ADFLAGS2LOGSTRBUFSIZ);
235 first = 0;
236 }
237 if (adflags & ADFLAGS_CREATE) {
238 if (!first)
239 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
240 strlcat(buf, "O_CREAT", ADFLAGS2LOGSTRBUFSIZ);
241 first = 0;
242 }
243 if (adflags & ADFLAGS_EXCL) {
244 if (!first)
245 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
246 strlcat(buf, "O_EXCL", ADFLAGS2LOGSTRBUFSIZ);
247 first = 0;
248 }
249 if (adflags & ADFLAGS_TRUNC) {
250 if (!first)
251 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
252 strlcat(buf, "O_TRUNC", ADFLAGS2LOGSTRBUFSIZ);
253 first = 0;
254 }
255
256 return buf;
257 }
258
259 #define OPENFLAGS2LOGSTRBUFSIZ 128
openflags2logstr(int oflags)260 const char *openflags2logstr(int oflags)
261 {
262 int first = 1;
263 static char buf[OPENFLAGS2LOGSTRBUFSIZ];
264
265 buf[0] = 0;
266
267 if ((oflags & O_RDONLY) || (oflags == O_RDONLY)) {
268 strlcat(buf, "O_RDONLY", OPENFLAGS2LOGSTRBUFSIZ);
269 first = 0;
270 }
271 if (oflags & O_RDWR) {
272 if (!first)
273 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
274 strlcat(buf, "O_RDWR", OPENFLAGS2LOGSTRBUFSIZ);
275 first = 0;
276 }
277 if (oflags & O_CREAT) {
278 if (!first)
279 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
280 strlcat(buf, "O_CREAT", OPENFLAGS2LOGSTRBUFSIZ);
281 first = 0;
282 }
283 if (oflags & O_TRUNC) {
284 if (!first)
285 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
286 strlcat(buf, "O_TRUNC", OPENFLAGS2LOGSTRBUFSIZ);
287 first = 0;
288 }
289 if (oflags & O_EXCL) {
290 if (!first)
291 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
292 strlcat(buf, "O_EXCL", OPENFLAGS2LOGSTRBUFSIZ);
293 first = 0;
294 }
295 return buf;
296 }
297
get_eid(uint32_t eid)298 static uint32_t get_eid(uint32_t eid)
299 {
300 if (eid <= 15)
301 return eid;
302 if (eid == AD_DEV)
303 return ADEID_PRIVDEV;
304 if (eid == AD_INO)
305 return ADEID_PRIVINO;
306 if (eid == AD_SYN)
307 return ADEID_PRIVSYN;
308 if (eid == AD_ID)
309 return ADEID_PRIVID;
310
311 return 0;
312 }
313
314
315 /**
316 * Initialize offset pointers
317 */
ad_init_offsets(struct adouble * ad)318 int ad_init_offsets(struct adouble *ad)
319 {
320 const struct entry *eid;
321
322 if (ad->ad_magic == AD_MAGIC)
323 return 0;
324
325 ad->ad_magic = AD_MAGIC;
326 ad->ad_version = ad->ad_vers & 0x0f0000;
327 if (!ad->ad_version) {
328 ad->ad_version = AD_VERSION;
329 }
330
331 memset(ad->ad_data, 0, sizeof(ad->ad_data));
332
333 if (ad->ad_vers == AD_VERSION2)
334 eid = entry_order2;
335 else if (ad->ad_vers == AD_VERSION_EA)
336 eid = entry_order_ea;
337 else
338 return -1;
339
340 while (eid->id) {
341 ad->ad_eid[eid->id].ade_off = eid->offset;
342 ad->ad_eid[eid->id].ade_len = eid->len;
343 eid++;
344 }
345
346 /*
347 * Ensure the resource fork offset is always set
348 */
349 #ifndef HAVE_EAFD
350 if (ad->ad_vers == AD_VERSION_EA)
351 ad_setentryoff(ad, ADEID_RFORK, ADEDOFF_RFORK_OSX);
352 #endif
353
354 return 0;
355 }
356
357 /* ----------------------------------- */
new_ad_header(struct adouble * ad,const char * path,struct stat * stp,int adflags)358 static int new_ad_header(struct adouble *ad, const char *path, struct stat *stp, int adflags)
359 {
360 const struct entry *eid;
361 uint16_t ashort;
362 struct stat st;
363
364 LOG(log_debug, logtype_ad, "new_ad_header(\"%s\")", path);
365
366 if (ad_init_offsets(ad) != 0)
367 return -1;
368
369 /* set default creator/type fields */
370 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRTYPEOFF,"\0\0\0\0", 4);
371 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRCREATOFF,"\0\0\0\0", 4);
372
373 /* make things invisible */
374 if ((ad->ad_options & ADVOL_INVDOTS)
375 && (*path == '.')
376 && !((adflags & ADFLAGS_DIR) && (path[1] == 0))
377 ) {
378 ashort = htons(ATTRBIT_INVISIBLE);
379 ad_setattr(ad, ashort);
380 ashort = htons(FINDERINFO_INVISIBLE);
381 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRFLAGOFF, &ashort, sizeof(ashort));
382 }
383
384 /* put something sane in the date fields */
385 if (stp == NULL) {
386 stp = &st;
387 if (lstat(path, &st) != 0)
388 return -1;
389 }
390 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, stp->st_mtime);
391 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, stp->st_mtime);
392 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, stp->st_mtime);
393 ad_setdate(ad, AD_DATE_BACKUP, AD_DATE_START);
394
395 return 0;
396 }
397
398 /**
399 * Read an AppleDouble buffer, returns 0 on success, -1 if an entry was malformatted
400 **/
parse_entries(struct adouble * ad,char * buf,uint16_t nentries)401 static int parse_entries(struct adouble *ad, char *buf, uint16_t nentries)
402 {
403 uint32_t eid, len, off;
404 int ret = 0;
405
406 /* now, read in the entry bits */
407 for (; nentries > 0; nentries-- ) {
408 memcpy(&eid, buf, sizeof( eid ));
409 eid = get_eid(ntohl(eid));
410 buf += sizeof( eid );
411 memcpy(&off, buf, sizeof( off ));
412 off = ntohl( off );
413 buf += sizeof( off );
414 memcpy(&len, buf, sizeof( len ));
415 len = ntohl( len );
416 buf += sizeof( len );
417
418 ad->ad_eid[eid].ade_off = off;
419 ad->ad_eid[eid].ade_len = len;
420
421 if (!eid
422 || eid > ADEID_MAX
423 || off >= sizeof(ad->ad_data)
424 || ((eid != ADEID_RFORK) && (off + len > sizeof(ad->ad_data))))
425 {
426 ret = -1;
427 LOG(log_warning, logtype_ad, "parse_entries: bogus eid: %u, off: %u, len: %u",
428 (uint)eid, (uint)off, (uint)len);
429 }
430 }
431
432 return ret;
433 }
434
435 /* this reads enough of the header so that we can figure out all of
436 * the entry lengths and offsets. once that's done, we just read/mmap
437 * the rest of the header in.
438 *
439 * NOTE: we're assuming that the resource fork is kept at the end of
440 * the file. also, mmapping won't work for the hfs fs until it
441 * understands how to mmap header files. */
ad_header_read(const char * path,struct adouble * ad,const struct stat * hst)442 static int ad_header_read(const char *path, struct adouble *ad, const struct stat *hst)
443 {
444 char *buf = ad->ad_data;
445 uint16_t nentries;
446 int len;
447 ssize_t header_len;
448 struct stat st;
449
450 /* read the header */
451 if ((header_len = adf_pread( ad->ad_mdp, buf, AD_DATASZ2, 0)) < 0) {
452 return -1;
453 }
454 if (header_len < AD_HEADER_LEN) {
455 errno = EIO;
456 return -1;
457 }
458
459 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
460 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
461 ad->ad_magic = ntohl( ad->ad_magic );
462 ad->ad_version = ntohl( ad->ad_version );
463
464 if ((ad->ad_magic != AD_MAGIC) || (ad->ad_version != AD_VERSION2)) {
465 LOG(log_error, logtype_ad, "ad_open: can't parse AppleDouble header.");
466 errno = EIO;
467 return -1;
468 }
469
470 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
471 nentries = ntohs( nentries );
472
473 /* read in all the entry headers. if we have more than the
474 * maximum, just hope that the rfork is specified early on. */
475 len = nentries*AD_ENTRY_LEN;
476
477 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
478 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
479
480 buf += AD_HEADER_LEN;
481 if (len > header_len - AD_HEADER_LEN) {
482 LOG(log_error, logtype_ad, "ad_header_read: can't read entry info.");
483 errno = EIO;
484 return -1;
485 }
486
487 /* figure out all of the entry offsets and lengths. if we aren't
488 * able to read a resource fork entry, bail. */
489 nentries = len / AD_ENTRY_LEN;
490 if (parse_entries(ad, buf, nentries) != 0) {
491 LOG(log_warning, logtype_ad, "ad_header_read(%s): malformed AppleDouble",
492 path ? fullpathname(path) : "");
493 errno = EIO;
494 return -1;
495 }
496 if (!ad_getentryoff(ad, ADEID_RFORK)
497 || (ad_getentryoff(ad, ADEID_RFORK) > sizeof(ad->ad_data))
498 ) {
499 LOG(log_error, logtype_ad, "ad_header_read: problem with rfork entry offset.");
500 errno = EIO;
501 return -1;
502 }
503
504 if (ad_getentryoff(ad, ADEID_RFORK) > header_len) {
505 LOG(log_error, logtype_ad, "ad_header_read: can't read in entries.");
506 errno = EIO;
507 return -1;
508 }
509
510 if (hst == NULL) {
511 hst = &st;
512 if (fstat(ad->ad_mdp->adf_fd, &st) < 0) {
513 return 1; /* fail silently */
514 }
515 }
516
517 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
518
519 return 0;
520 }
521
522 /* error here means it's not ad ._ adouble:osx file and thus we return 1 */
ad_valid_header_osx(const char * path)523 int ad_valid_header_osx(const char *path)
524 {
525 EC_INIT;
526 int fd = -1;
527 struct adouble adosx;
528 char *buf = &adosx.ad_data[0];
529 ssize_t header_len;
530
531 LOG(log_debug, logtype_ad, "ad_valid_header_osx(\"%s\"): BEGIN", fullpathname(path));
532
533 EC_NEG1( fd = open(path, O_RDONLY) );
534
535 /* read the header */
536 EC_NEG1( header_len = read(fd, buf, AD_DATASZ_OSX) );
537
538 if (header_len < AD_HEADER_LEN)
539 EC_FAIL;
540
541 memcpy(&adosx.ad_magic, buf, sizeof(adosx.ad_magic));
542 memcpy(&adosx.ad_version, buf + ADEDOFF_VERSION, sizeof(adosx.ad_version));
543 adosx.ad_magic = ntohl(adosx.ad_magic);
544 adosx.ad_version = ntohl(adosx.ad_version);
545
546 if ((adosx.ad_magic != AD_MAGIC) || (adosx.ad_version != AD_VERSION2)) {
547 LOG(log_warning, logtype_ad, "ad_valid_header_osx(\"%s\"): not an adouble:osx file", fullpathname(path));
548 EC_FAIL;
549 }
550
551 if (strncmp(buf + ADEDOFF_FILLER,
552 AD_FILLER_NETATALK,
553 strlen(AD_FILLER_NETATALK)) != 0)
554 /*
555 * It's a split fork created by OS X, it's not our "own" ._ file
556 * and thus not a valid header in this context.
557 * We allow enumeration and access.
558 */
559 EC_FAIL;
560
561 EC_CLEANUP:
562 LOG(log_debug, logtype_ad, "ad_valid_header_osx(\"%s\"): END: %d", fullpathname(path), ret);
563 if (fd != -1)
564 close(fd);
565 if (ret != 0)
566 return 1;
567 return 0;
568 }
569
570 /**
571 * Convert from Apple's ._ file to Netatalk
572 *
573 * Apple's AppleDouble may contain a FinderInfo entry longer then 32 bytes
574 * containing packed xattrs. Netatalk can't deal with that, so we
575 * simply discard the packed xattrs.
576 *
577 * As we call ad_open() which might result in a recursion, just to be sure
578 * use static variable in_conversion to check for that.
579 *
580 * Returns -1 in case an error occured, 0 if no conversion was done, 1 otherwise
581 **/
ad_convert_osx(const char * path,struct adouble * ad)582 static int ad_convert_osx(const char *path, struct adouble *ad)
583 {
584 EC_INIT;
585 static bool in_conversion = false;
586 char *map;
587 int finderlen = ad_getentrylen(ad, ADEID_FINDERI);
588 ssize_t origlen;
589
590 if (in_conversion || finderlen == ADEDLEN_FINDERI)
591 return 0;
592 in_conversion = true;
593
594 LOG(log_debug, logtype_ad, "Converting OS X AppleDouble %s, FinderInfo length: %d",
595 fullpathname(path), finderlen);
596
597 origlen = ad_getentryoff(ad, ADEID_RFORK) + ad_getentrylen(ad, ADEID_RFORK);
598
599 map = mmap(NULL, origlen, PROT_READ | PROT_WRITE, MAP_SHARED, ad_reso_fileno(ad), 0);
600 if (map == MAP_FAILED) {
601 LOG(log_error, logtype_ad, "mmap AppleDouble: %s\n", strerror(errno));
602 EC_FAIL;
603 }
604
605 memmove(map + ad_getentryoff(ad, ADEID_FINDERI) + ADEDLEN_FINDERI,
606 map + ad_getentryoff(ad, ADEID_RFORK),
607 ad_getentrylen(ad, ADEID_RFORK));
608
609 ad_setentrylen(ad, ADEID_FINDERI, ADEDLEN_FINDERI);
610 ad->ad_rlen = ad_getentrylen(ad, ADEID_RFORK);
611 ad_setentryoff(ad, ADEID_RFORK, ad_getentryoff(ad, ADEID_FINDERI) + ADEDLEN_FINDERI);
612
613 EC_ZERO_LOG( ftruncate(ad_reso_fileno(ad),
614 ad_getentryoff(ad, ADEID_RFORK)
615 + ad_getentrylen(ad, ADEID_RFORK)) );
616
617 (void)ad_rebuild_adouble_header_osx(ad, map);
618 munmap(map, origlen);
619
620 /* Create a metadata EA if one doesn't exit */
621 if (strlen(path) < 3)
622 EC_EXIT_STATUS(0);
623 struct adouble adea;
624 ad_init_old(&adea, AD_VERSION_EA, ad->ad_options);
625
626 if (ad_open(&adea, path + 2, ADFLAGS_HF | ADFLAGS_RDWR | ADFLAGS_CREATE, 0666) < 0) {
627 LOG(log_error, logtype_ad, "create metadata: %s\n", strerror(errno));
628 EC_FAIL;
629 }
630 if (adea.ad_mdp->adf_flags & O_CREAT) {
631 memcpy(ad_entry(&adea, ADEID_FINDERI),
632 ad_entry(ad, ADEID_FINDERI),
633 ADEDLEN_FINDERI);
634 ad_flush(&adea);
635 }
636 ad_close(&adea, ADFLAGS_HF);
637
638 EC_CLEANUP:
639 in_conversion = false;
640 if (ret != 0)
641 return -1;
642 return 1;
643 }
644
645 /* Read an ._ file, only uses the resofork, finderinfo is taken from EA */
ad_header_read_osx(const char * path,struct adouble * ad,const struct stat * hst)646 static int ad_header_read_osx(const char *path, struct adouble *ad, const struct stat *hst)
647 {
648 EC_INIT;
649 struct adouble adosx;
650 char *buf;
651 uint16_t nentries;
652 int len;
653 ssize_t header_len;
654 struct stat st;
655 int retry_read = 0;
656
657 reread:
658 LOG(log_debug, logtype_ad, "ad_header_read_osx: %s", path ? fullpathname(path) : "");
659 ad_init_old(&adosx, AD_VERSION_EA, ad->ad_options);
660 buf = &adosx.ad_data[0];
661 memset(buf, 0, sizeof(adosx.ad_data));
662 adosx.ad_rfp->adf_fd = ad_reso_fileno(ad);
663
664 /* read the header */
665 EC_NEG1( header_len = adf_pread(ad->ad_rfp, buf, AD_DATASZ_OSX, 0) );
666
667 if (header_len < AD_HEADER_LEN) {
668 errno = EIO;
669 return -1;
670 }
671
672 memcpy(&adosx.ad_magic, buf, sizeof(adosx.ad_magic));
673 memcpy(&adosx.ad_version, buf + ADEDOFF_VERSION, sizeof(adosx.ad_version));
674 adosx.ad_magic = ntohl(adosx.ad_magic);
675 adosx.ad_version = ntohl(adosx.ad_version);
676
677 if ((adosx.ad_magic != AD_MAGIC) || (adosx.ad_version != AD_VERSION2)) {
678 LOG(log_error, logtype_ad, "ad_header_read_osx: can't parse AppleDouble header");
679 errno = EIO;
680 return -1;
681 }
682
683 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
684 nentries = ntohs(nentries);
685 len = nentries * AD_ENTRY_LEN;
686
687 if (len + AD_HEADER_LEN > sizeof(adosx.ad_data))
688 len = sizeof(adosx.ad_data) - AD_HEADER_LEN;
689
690 buf += AD_HEADER_LEN;
691 if (len > header_len - AD_HEADER_LEN) {
692 LOG(log_error, logtype_ad, "ad_header_read_osx: can't read entry info.");
693 errno = EIO;
694 return -1;
695 }
696
697 nentries = len / AD_ENTRY_LEN;
698 if (parse_entries(&adosx, buf, nentries) != 0) {
699 LOG(log_warning, logtype_ad, "ad_header_read(%s): malformed AppleDouble",
700 path ? fullpathname(path) : "");
701 }
702
703 if (ad_getentrylen(&adosx, ADEID_FINDERI) != ADEDLEN_FINDERI) {
704 LOG(log_warning, logtype_ad, "Convert OS X to Netatalk AppleDouble: %s",
705 path ? fullpathname(path) : "");
706
707 if (retry_read > 0) {
708 LOG(log_error, logtype_ad, "ad_header_read_osx: %s, giving up", path ? fullpathname(path) : "");
709 errno = EIO;
710 EC_FAIL;
711 }
712 retry_read++;
713 if (ad_convert_osx(path, &adosx) == 1) {
714 goto reread;
715 }
716 errno = EIO;
717 EC_FAIL;
718 }
719
720 if (ad_getentryoff(&adosx, ADEID_RFORK) == 0
721 || ad_getentryoff(&adosx, ADEID_RFORK) > sizeof(ad->ad_data)
722 || ad_getentryoff(&adosx, ADEID_RFORK) > header_len
723 ) {
724 LOG(log_error, logtype_ad, "ad_header_read_osx: problem with rfork entry offset.");
725 errno = EIO;
726 return -1;
727 }
728
729 if (hst == NULL) {
730 hst = &st;
731 EC_NEG1( fstat(ad_reso_fileno(ad), &st) );
732 }
733
734 ad_setentryoff(ad, ADEID_RFORK, ad_getentryoff(&adosx, ADEID_RFORK));
735 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
736
737 EC_CLEANUP:
738 EC_EXIT;
739 }
740
ad_header_read_ea(const char * path,struct adouble * ad,const struct stat * hst _U_)741 static int ad_header_read_ea(const char *path, struct adouble *ad, const struct stat *hst _U_)
742 {
743 EC_INIT;
744 uint16_t nentries;
745 int len;
746 ssize_t header_len;
747 char *buf = ad->ad_data;
748
749 if (ad_meta_fileno(ad) != -1)
750 header_len = sys_fgetxattr(ad_meta_fileno(ad), AD_EA_META, ad->ad_data, AD_DATASZ_EA);
751 else
752 header_len = sys_getxattr(path, AD_EA_META, ad->ad_data, AD_DATASZ_EA);
753 if (header_len < 1) {
754 LOG(log_debug, logtype_ad, "ad_header_read_ea: %s", strerror(errno));
755 EC_FAIL;
756 }
757
758 if (header_len < AD_DATASZ_EA) {
759 LOG(log_error, logtype_ad, "ad_header_read_ea(\"%s\"): short metadata EA", fullpathname(path));
760 errno = EINVAL;
761 EC_FAIL;
762 }
763
764 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
765 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
766
767 ad->ad_magic = ntohl( ad->ad_magic );
768 ad->ad_version = ntohl( ad->ad_version );
769
770 if ((ad->ad_magic != AD_MAGIC) || (ad->ad_version != AD_VERSION2)) {
771 LOG(log_error, logtype_ad, "ad_header_read_ea(\"%s\"): wrong magic or version", fullpathname(path));
772 errno = EINVAL;
773 EC_FAIL;
774 }
775
776 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
777 nentries = ntohs( nentries );
778 if (nentries != ADEID_NUM_EA) {
779 LOG(log_error, logtype_ad, "ad_header_read_ea(\"%s\"): invalid number of entries: %d", fullpathname(path), nentries);
780 errno = EINVAL;
781 EC_FAIL;
782 }
783
784 /* Now parse entries */
785 if (parse_entries(ad, buf + AD_HEADER_LEN, nentries)) {
786 LOG(log_warning, logtype_ad, "ad_header_read(%s): malformed AppleDouble",
787 path ? fullpathname(path) : "");
788 errno = EINVAL;
789 EC_FAIL;
790 }
791
792 if (nentries != ADEID_NUM_EA
793 || !ad_entry(ad, ADEID_FINDERI)
794 || !ad_entry(ad, ADEID_COMMENT)
795 || !ad_entry(ad, ADEID_FILEDATESI)
796 || !ad_entry(ad, ADEID_AFPFILEI)
797 || !ad_entry(ad, ADEID_PRIVDEV)
798 || !ad_entry(ad, ADEID_PRIVINO)
799 || !ad_entry(ad, ADEID_PRIVSYN)
800 || !ad_entry(ad, ADEID_PRIVID)) {
801 LOG(log_error, logtype_ad, "ad_header_read_ea(\"%s\"): invalid metadata EA", fullpathname(path));
802 errno = EINVAL;
803 EC_FAIL;
804 }
805
806 /*
807 * Ensure the resource fork offset is always set
808 */
809 #ifndef HAVE_EAFD
810 if (ad->ad_vers == AD_VERSION_EA)
811 ad_setentryoff(ad, ADEID_RFORK, ADEDOFF_RFORK_OSX);
812 #endif
813
814 EC_CLEANUP:
815 if (ret != 0 && errno == EINVAL) {
816 become_root();
817 (void)sys_removexattr(path, AD_EA_META);
818 unbecome_root();
819 LOG(log_error, logtype_ad, "ad_header_read_ea(\"%s\"): deleted invalid metadata EA", fullpathname(path), nentries);
820 errno = ENOENT;
821 }
822 EC_EXIT;
823 }
824
825 /*!
826 * Takes a path to an AppleDouble file and creates the parrent .AppleDouble directory
827 *
828 * Example:
829 * path: "/path/.AppleDouble/file"
830 * => mkdir("/path/.AppleDouble/") (in ad_mkdir())
831 */
ad_mkrf(const char * path)832 static int ad_mkrf(const char *path)
833 {
834 char *slash;
835 /*
836 * Probably .AppleDouble doesn't exist, try to mkdir it.
837 */
838 if (NULL == ( slash = strrchr( path, '/' )) ) {
839 return -1;
840 }
841 *slash = '\0';
842 errno = 0;
843 if ( ad_mkdir( path, 0777 ) < 0 ) {
844 return -1;
845 }
846 *slash = '/';
847 return 0;
848 }
849
850 #ifdef HAVE_EAFD
ad_mkrf_ea(const char * path _U_)851 static int ad_mkrf_ea(const char *path _U_)
852 {
853 AFP_PANIC("ad_mkrf_ea: don't use");
854 return 0;
855 }
856 #endif
857
ad_mkrf_osx(const char * path _U_)858 static int ad_mkrf_osx(const char *path _U_)
859 {
860 return 0;
861 }
862
863 /* ----------------
864 if we are root change path user/ group
865 It can be a native function for BSD cf. FAQ.Q10
866 path: pathname to chown
867 stbuf: parent directory inode
868
869 use fstat and fchown or lchown with linux?
870 */
871 #define EMULATE_SUIDDIR
872
ad_chown(const char * path,struct stat * stbuf)873 static int ad_chown(const char *path, struct stat *stbuf)
874 {
875 int ret = 0;
876 #ifdef EMULATE_SUIDDIR
877 uid_t id;
878
879 if (default_uid != (uid_t)-1) {
880 /* we are root (admin) */
881 id = (default_uid)?default_uid:stbuf->st_uid;
882 ret = lchown( path, id, stbuf->st_gid );
883 }
884 #endif
885 return ret;
886 }
887
888 #define DEFMASK 07700 /* be conservative */
889
890 /* ----------------
891 return access right and inode of path parent directory
892 */
ad_mode_st(const char * path,mode_t * mode,struct stat * stbuf)893 static int ad_mode_st(const char *path, mode_t *mode, struct stat *stbuf)
894 {
895 if (*mode == 0) {
896 return -1;
897 }
898 if (ad_stat(path, stbuf) != 0) {
899 *mode &= DEFMASK;
900 return -1;
901 }
902 *mode &= stbuf->st_mode;
903 return 0;
904 }
905
906 /* --------------------------- */
ad_header_upgrade(struct adouble * ad _U_,const char * name _U_)907 static int ad_header_upgrade(struct adouble *ad _U_, const char *name _U_)
908 {
909 return 0;
910 }
911
ad_header_upgrade_ea(struct adouble * ad _U_,const char * name _U_)912 static int ad_header_upgrade_ea(struct adouble *ad _U_, const char *name _U_)
913 {
914 AFP_PANIC("ad_header_upgrade_ea: don't use");
915 return 0;
916 }
917
918 /*!
919 * Error handling for adouble header(=metadata) file open error
920 *
921 * We're called because opening ADFLAGS_HF caused an error.
922 * 1. In case ad_open is called with ADFLAGS_NOHF the error is suppressed.
923 * 2. Open non-existent ressource fork, this will just result in first read return EOF
924 * 3. If ad_open was called with ADFLAGS_DF we may have opened the datafork and thus
925 * ought to close it before returning with an error condition.
926 */
ad_error(struct adouble * ad,int adflags)927 static int ad_error(struct adouble *ad, int adflags)
928 {
929 int err = errno;
930 if (adflags & ADFLAGS_NOHF) { /* 1 */
931 return 0;
932 }
933 if ((adflags & ADFLAGS_RDONLY) && (adflags & ADFLAGS_RF) && (errno == ENOENT)) /* 2 */
934 return 0;
935 if (adflags & (ADFLAGS_DF | ADFLAGS_SETSHRMD | ADFLAGS_CHECK_OF)) { /* 3 */
936 ad_close( ad, ADFLAGS_DF );
937 err = errno;
938 }
939 return -1 ;
940 }
941
942 /*!
943 * Map ADFLAGS to open() flags
944 *
945 * @param adfile (r) the file you really want to open: ADFLAGS_DF or ADFLAGS_HF
946 * @param adflags (r) flags from ad_open(..., adflags, ...)
947 * @returns mapped flags suitable for calling open()
948 */
ad2openflags(const struct adouble * ad,int adfile,int adflags)949 static int ad2openflags(const struct adouble *ad, int adfile, int adflags)
950 {
951 int oflags = 0;
952
953 if (adflags & ADFLAGS_RDWR)
954 oflags |= O_RDWR;
955 if (adflags & ADFLAGS_RDONLY) {
956 if (((adfile == ADFLAGS_DF || adfile == ADFLAGS_RF) && (adflags & ADFLAGS_SETSHRMD))
957 /* need rw access for locks */
958 || ((adfile == ADFLAGS_HF) && (ad->ad_vers == AD_VERSION2)))
959 /* need rw access for adouble file for the case:
960 1) openfork(data+meta:O_RDONLY), 2) openfork(reso(=meta):O_RDWR) */
961 oflags |= O_RDWR;
962 else
963 oflags |= O_RDONLY;
964 }
965 if (adflags & ADFLAGS_CREATE)
966 oflags |= O_CREAT;
967 if (adflags & ADFLAGS_EXCL)
968 oflags |= O_EXCL;
969 if (adflags & ADFLAGS_TRUNC)
970 oflags |= O_TRUNC;
971
972 if (!(ad->ad_options & ADVOL_FOLLO_SYML))
973 oflags |= O_NOFOLLOW;
974
975 return oflags;
976 }
977
ad_open_df(const char * path,int adflags,mode_t mode,struct adouble * ad)978 static int ad_open_df(const char *path, int adflags, mode_t mode, struct adouble *ad)
979 {
980 EC_INIT;
981 struct stat st_dir;
982 int oflags;
983 mode_t admode;
984 int st_invalid = -1;
985 ssize_t lsz;
986
987 LOG(log_debug, logtype_ad,
988 "ad_open_df(\"%s\", %s): BEGIN [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
989 fullpathname(path), adflags2logstr(adflags),
990 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
991 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
992 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
993
994 if (ad_data_fileno(ad) != -1) {
995 /* the file is already open, but we want write access: */
996 if ((adflags & ADFLAGS_RDWR)
997 /* and it was denied the first time: */
998 && (ad->ad_data_fork.adf_flags & O_RDONLY)) {
999 errno = EACCES;
1000 return -1;
1001 }
1002 /* it's not new anymore */
1003 ad->ad_data_fork.adf_flags &= ~( O_TRUNC | O_CREAT );
1004 ad->ad_data_fork.adf_refcount++;
1005 goto EC_CLEANUP;
1006 }
1007
1008 oflags = ad2openflags(ad, ADFLAGS_DF, adflags);
1009
1010 admode = mode;
1011 if ((adflags & ADFLAGS_CREATE)) {
1012 st_invalid = ad_mode_st(path, &admode, &st_dir);
1013 if ((ad->ad_options & ADVOL_UNIXPRIV))
1014 admode = mode;
1015 }
1016
1017 ad->ad_data_fork.adf_fd = open(path, oflags, admode);
1018
1019 if (ad->ad_data_fork.adf_fd == -1) {
1020 switch (errno) {
1021 case EACCES:
1022 case EPERM:
1023 case EROFS:
1024 if ((adflags & ADFLAGS_SETSHRMD) && (adflags & ADFLAGS_RDONLY)) {
1025 oflags &= ~O_RDWR;
1026 oflags |= O_RDONLY;
1027 EC_NEG1( ad->ad_data_fork.adf_fd = open(path, oflags, admode) );
1028 break;
1029 }
1030 return -1;
1031 case OPEN_NOFOLLOW_ERRNO:
1032 ad->ad_data_fork.adf_syml = malloc(MAXPATHLEN+1);
1033 if ((lsz = readlink(path, ad->ad_data_fork.adf_syml, MAXPATHLEN)) <= 0) {
1034 free(ad->ad_data_fork.adf_syml);
1035 EC_FAIL;
1036 }
1037 ad->ad_data_fork.adf_syml[lsz] = 0;
1038 ad->ad_data_fork.adf_fd = AD_SYMLINK;
1039 break;
1040 default:
1041 EC_FAIL;
1042 }
1043 }
1044
1045 if (!st_invalid)
1046 ad_chown(path, &st_dir); /* just created, set owner if admin (root) */
1047
1048 ad->ad_data_fork.adf_flags = oflags;
1049 adf_lock_init(&ad->ad_data_fork);
1050 ad->ad_data_fork.adf_refcount++;
1051
1052 EC_CLEANUP:
1053 LOG(log_debug, logtype_ad,
1054 "ad_open_df(\"%s\", %s): END: %d [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1055 fullpathname(path), adflags2logstr(adflags), ret,
1056 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1057 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1058 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1059 EC_EXIT;
1060 }
1061
ad_open_hf_v2(const char * path,int adflags,mode_t mode,struct adouble * ad)1062 static int ad_open_hf_v2(const char *path, int adflags, mode_t mode, struct adouble *ad)
1063 {
1064 EC_INIT;
1065 struct stat st_dir;
1066 struct stat st_meta;
1067 struct stat *pst = NULL;
1068 const char *ad_p;
1069 int oflags, nocreatflags, opened = 0;
1070 mode_t admode;
1071 int st_invalid = -1;
1072
1073 LOG(log_debug, logtype_ad,
1074 "ad_open_hf_v2(\"%s\", %s): BEGIN [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1075 fullpathname(path), adflags2logstr(adflags),
1076 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1077 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1078 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1079
1080 if (ad_meta_fileno(ad) != -1) {
1081 /* the file is already open, but we want write access: */
1082 if ((adflags & ADFLAGS_RDWR) &&
1083 /* and it was already denied: */
1084 (ad->ad_mdp->adf_flags & O_RDONLY)) {
1085 errno = EACCES;
1086 EC_FAIL;
1087 }
1088 ad_refresh(path, ad);
1089 /* it's not new anymore */
1090 ad->ad_mdp->adf_flags &= ~( O_TRUNC | O_CREAT );
1091 ad->ad_mdp->adf_refcount++;
1092 goto EC_CLEANUP;
1093 }
1094
1095 ad_p = ad->ad_ops->ad_path(path, adflags);
1096 oflags = ad2openflags(ad, ADFLAGS_HF, adflags);
1097 LOG(log_debug, logtype_ad,"ad_open_hf_v2(\"%s\"): open flags: %s",
1098 fullpathname(path), openflags2logstr(oflags));
1099 nocreatflags = oflags & ~(O_CREAT | O_EXCL);
1100
1101 ad_meta_fileno(ad) = open(ad_p, nocreatflags);
1102
1103 if (ad_meta_fileno(ad) != -1) {
1104 ad->ad_mdp->adf_flags = nocreatflags;
1105 } else {
1106 switch (errno) {
1107 case EACCES:
1108 case EPERM:
1109 case EROFS:
1110 if ((adflags & ADFLAGS_RDONLY) && (adflags & ADFLAGS_SETSHRMD)) {
1111 nocreatflags &= ~O_RDWR;
1112 nocreatflags |= O_RDONLY;
1113 EC_NEG1( ad_meta_fileno(ad) = open(ad_p, nocreatflags) );
1114 ad->ad_mdp->adf_flags = nocreatflags;
1115 break;
1116 }
1117 EC_FAIL;
1118 case ENOENT:
1119 if (!(oflags & O_CREAT))
1120 EC_FAIL;
1121 /*
1122 * We're expecting to create a new adouble header file here
1123 */
1124 LOG(log_debug, logtype_ad, "ad_open(\"%s\"): creating adouble file",
1125 fullpathname(path));
1126 admode = mode;
1127 errno = 0;
1128 st_invalid = ad_mode_st(ad_p, &admode, &st_dir);
1129 if ((ad->ad_options & ADVOL_UNIXPRIV))
1130 admode = mode;
1131 admode = ad_hf_mode(admode);
1132 if (errno == ENOENT) {
1133 EC_NEG1_LOG( ad->ad_ops->ad_mkrf(ad_p) );
1134 admode = mode;
1135 st_invalid = ad_mode_st(ad_p, &admode, &st_dir);
1136 if ((ad->ad_options & ADVOL_UNIXPRIV))
1137 admode = mode;
1138 admode = ad_hf_mode(admode);
1139 }
1140
1141 /* retry with O_CREAT */
1142 EC_NEG1( ad_meta_fileno(ad) = open(ad_p, oflags, admode) );
1143 ad->ad_mdp->adf_flags = oflags;
1144 /* just created, set owner if admin owner (root) */
1145 if (!st_invalid)
1146 ad_chown(ad_p, &st_dir);
1147 break;
1148 default:
1149 EC_FAIL;
1150 }
1151 }
1152
1153 /* Now we've got a new opened fd, we need to check that in the error case */
1154 opened = 1;
1155
1156 if (!(ad->ad_mdp->adf_flags & O_CREAT)) {
1157 /* check for 0 length files, treat them as new. */
1158 if (fstat(ad->ad_mdp->adf_fd, &st_meta) == 0) {
1159 if (st_meta.st_size == 0)
1160 ad->ad_mdp->adf_flags |= O_TRUNC;
1161 else
1162 /* we have valid data in st_meta stat structure, reused it in ad_header_read */
1163 pst = &st_meta;
1164 }
1165 }
1166
1167 adf_lock_init(ad->ad_mdp);
1168 ad->ad_mdp->adf_refcount = 1;
1169
1170 if ((ad->ad_mdp->adf_flags & ( O_TRUNC | O_CREAT ))) {
1171 /* This is a new adouble header file, create it */
1172 EC_NEG1_LOG( new_ad_header(ad, path, pst, adflags) );
1173 ad_flush(ad);
1174 } else {
1175 /* Read the adouble header in and parse it.*/
1176 EC_NEG1_LOG( ad->ad_ops->ad_header_read(path, ad, pst) );
1177 }
1178
1179 EC_CLEANUP:
1180 if (ret != 0 && opened && ad_meta_fileno(ad) != -1) {
1181 close(ad_meta_fileno(ad));
1182 ad_meta_fileno(ad) = -1;
1183 ad->ad_mdp->adf_refcount = 0;
1184 }
1185 LOG(log_debug, logtype_ad,
1186 "ad_open_hf_v2(\"%s\", %s): END: %d [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1187 fullpathname(path), adflags2logstr(adflags), ret,
1188 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1189 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1190 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1191 EC_EXIT;
1192 }
1193
ad_open_hf_ea(const char * path,int adflags,int mode,struct adouble * ad)1194 static int ad_open_hf_ea(const char *path, int adflags, int mode, struct adouble *ad)
1195 {
1196 EC_INIT;
1197 int oflags;
1198 int opened = 0;
1199
1200 LOG(log_debug, logtype_ad,
1201 "ad_open_hf_ea(\"%s\", %s): BEGIN [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1202 fullpathname(path), adflags2logstr(adflags),
1203 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1204 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1205 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1206
1207 oflags = ad2openflags(ad, ADFLAGS_DF, adflags) & ~(O_CREAT | O_TRUNC);
1208
1209 if (ad_meta_fileno(ad) == AD_SYMLINK)
1210 goto EC_CLEANUP;
1211
1212 if (ad_meta_fileno(ad) != -1) {
1213 /* the file is already open, but we want write access: */
1214 if ((oflags & O_RDWR) &&
1215 /* and it was already denied: */
1216 (ad->ad_mdp->adf_flags & O_RDONLY)) {
1217 LOG(log_error, logtype_ad, "ad_open_hf_ea(%s): rw request for ro file: %s",
1218 fullpathname(path), strerror(errno));
1219 errno = EACCES;
1220 EC_FAIL;
1221 }
1222 /* it's not new anymore */
1223 ad->ad_mdp->adf_flags &= ~( O_TRUNC | O_CREAT );
1224 } else {
1225 if (oflags & O_RDWR) {
1226 /* Fo a RDONLY adouble we just use sys_lgetxattr instead if sys_fgetxattr */
1227 if (adflags & ADFLAGS_DIR)
1228 /* For directories we open the directory RDONYL so we can later fchdir() */
1229 oflags = (oflags & ~O_RDWR) | O_RDONLY;
1230 LOG(log_debug, logtype_ad, "ad_open_hf_ea(\"%s\"): opening base file for meta adouble EA", path);
1231 EC_NEG1(ad_meta_fileno(ad) = open(path, oflags));
1232 opened = 1;
1233 ad->ad_mdp->adf_flags = oflags;
1234 }
1235 }
1236
1237 /* Read the adouble header in and parse it.*/
1238 if (ad->ad_ops->ad_header_read(path, ad, NULL) != 0) {
1239 if (!(adflags & ADFLAGS_CREATE)) {
1240 LOG(log_debug, logtype_ad, "ad_open_hf_ea(\"%s\"): can't read metadata EA", path);
1241 errno = ENOENT;
1242 EC_FAIL;
1243 }
1244 if ((adflags & ADFLAGS_CREATE) && (ad->ad_options & ADVOL_RO)) {
1245 errno = EROFS;
1246 EC_FAIL;
1247 }
1248
1249 LOG(log_debug, logtype_ad, "ad_open_hf_ea(\"%s\"): creating metadata EA", path);
1250
1251 /* It doesnt exist, EPERM or another error */
1252 if (!(errno == ENOATTR || errno == ENOENT)) {
1253 LOG(log_error, logtype_ad, "ad_open_hf_ea: unexpected: %s", strerror(errno));
1254 EC_FAIL;
1255 }
1256
1257 /* Create one */
1258 EC_NEG1_LOG(new_ad_header(ad, path, NULL, adflags));
1259 ad->ad_mdp->adf_flags |= O_CREAT; /* mark as just created */
1260 ad_flush(ad);
1261 LOG(log_debug, logtype_ad, "ad_open_hf_ea(\"%s\"): created metadata EA", path);
1262 }
1263
1264 if (ad_meta_fileno(ad) != -1)
1265 ad->ad_mdp->adf_refcount++;
1266 ad->ad_rlen = ad_reso_size(path, adflags, ad);
1267
1268 EC_CLEANUP:
1269 if (ret != 0 && opened && ad_meta_fileno(ad) != -1) {
1270 close(ad_meta_fileno(ad));
1271 ad_meta_fileno(ad) = -1;
1272 ad->ad_mdp->adf_refcount = 0;
1273 }
1274 LOG(log_debug, logtype_ad,
1275 "ad_open_hf_ea(\"%s\", %s): END: %d [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1276 fullpathname(path), adflags2logstr(adflags), ret,
1277 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1278 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1279 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1280
1281 EC_EXIT;
1282 }
1283
ad_open_hf(const char * path,int adflags,int mode,struct adouble * ad)1284 static int ad_open_hf(const char *path, int adflags, int mode, struct adouble *ad)
1285 {
1286 int ret = 0;
1287
1288 ad->ad_meta_refcount++;
1289
1290 switch (ad->ad_vers) {
1291 case AD_VERSION2:
1292 ret = ad_open_hf_v2(path, adflags, mode, ad);
1293 break;
1294 case AD_VERSION_EA:
1295 ret = ad_open_hf_ea(path, adflags, mode, ad);
1296 break;
1297 default:
1298 ret = -1;
1299 break;
1300 }
1301
1302 if (ret != 0) {
1303 ad->ad_meta_refcount--;
1304 ret = ad_error(ad, adflags);
1305 }
1306
1307 return ret;
1308 }
1309
1310 /*!
1311 * Get resofork length for adouble:ea, parameter 'ad' may be NULL
1312 */
ad_reso_size(const char * path,int adflags,struct adouble * ad)1313 off_t ad_reso_size(const char *path, int adflags, struct adouble *ad)
1314 {
1315 EC_INIT;
1316 struct stat st;
1317 off_t rlen;
1318
1319 if (adflags & ADFLAGS_DIR)
1320 EC_FAIL;
1321
1322 LOG(log_debug, logtype_ad, "ad_reso_size(\"%s\"): BEGIN", path);
1323
1324 #ifdef HAVE_EAFD
1325 ssize_t easz;
1326
1327 if (ad && ad_reso_fileno(ad) != -1) {
1328 EC_NEG1( fstat(ad_reso_fileno(ad), &st) );
1329 rlen = st.st_size;
1330 } else if (ad && ad_meta_fileno(ad) != -1) {
1331 EC_NEG1( (rlen = sys_fgetxattr(ad_meta_fileno(ad), AD_EA_RESO, NULL, 0)) );
1332 } else {
1333 EC_NEG1( (rlen = sys_lgetxattr(path, AD_EA_RESO, NULL, 0)) );
1334 }
1335
1336 #else
1337 const char *rfpath;
1338 EC_NULL_LOG( rfpath = ad_path_osx(path, adflags));
1339 EC_ZERO( lstat(rfpath, &st));
1340 if (st.st_size > ADEDOFF_RFORK_OSX)
1341 rlen = st.st_size - ADEDOFF_RFORK_OSX;
1342 else
1343 rlen = 0;
1344 #endif
1345
1346 LOG(log_debug, logtype_ad, "ad_reso_size(\"%s\"): size: %zd", path, rlen);
1347
1348 EC_CLEANUP:
1349 if (ret != 0)
1350 rlen = 0;
1351 return rlen;
1352 }
1353
ad_open_rf_v2(const char * path,int adflags,int mode,struct adouble * ad)1354 static int ad_open_rf_v2(const char *path, int adflags, int mode, struct adouble *ad)
1355 {
1356 EC_INIT;
1357
1358 /*
1359 * ad_open_hf_v2() does the work, but if it failed and adflags are ADFLAGS_NOHF | ADFLAGS_RF
1360 * ad_open_hf_v2() didn't give an error, but we're supposed to return a reso fork fd
1361 */
1362
1363 LOG(log_debug, logtype_ad, "ad_open_rf_v2(\"%s\"): BEGIN", fullpathname(path));
1364
1365 if (!AD_META_OPEN(ad) && !(adflags & (ADFLAGS_NORF | ADFLAGS_RDONLY)))
1366 EC_FAIL;
1367 if (AD_META_OPEN(ad))
1368 ad->ad_reso_refcount++;
1369
1370 EC_CLEANUP:
1371 LOG(log_debug, logtype_ad, "ad_open_rf_v2(\"%s\"): END: %d", fullpathname(path), ret);
1372 EC_EXIT;
1373 }
1374
ad_open_rf_ea(const char * path,int adflags,int mode,struct adouble * ad)1375 static int ad_open_rf_ea(const char *path, int adflags, int mode, struct adouble *ad)
1376 {
1377 EC_INIT;
1378 int oflags;
1379 int opened = 0;
1380 int closeflags = adflags & (ADFLAGS_DF | ADFLAGS_HF);
1381 #ifndef HAVE_EAFD
1382 const char *rfpath;
1383 struct stat st;
1384 #endif
1385
1386 LOG(log_debug, logtype_ad, "ad_open_rf(\"%s\"): BEGIN", fullpathname(path));
1387
1388 oflags = ad2openflags(ad, ADFLAGS_RF, adflags) & ~O_CREAT;
1389
1390 if (ad_reso_fileno(ad) != -1) {
1391 /* the file is already open, but we want write access: */
1392 if ((oflags & O_RDWR)
1393 /* and it was already denied: */
1394 && (ad->ad_rfp->adf_flags & O_RDONLY)) {
1395 errno = EACCES;
1396 EC_FAIL;
1397 }
1398 ad->ad_rfp->adf_flags &= ~( O_TRUNC | O_CREAT );
1399 ad->ad_reso_refcount++;
1400 ad->ad_rfp->adf_refcount++;
1401 EC_NEG1_LOG( ad->ad_rlen = ad_reso_size(path, adflags, ad));
1402 goto EC_CLEANUP;
1403 }
1404 #ifdef HAVE_EAFD
1405 if (ad_meta_fileno(ad) < 0)
1406 EC_FAIL;
1407 if ((ad_reso_fileno(ad) = sys_getxattrfd(ad_meta_fileno(ad), AD_EA_RESO, oflags)) == -1) {
1408 if (!(adflags & ADFLAGS_CREATE)) {
1409 switch (errno) {
1410 case EACCES:
1411 case EPERM:
1412 case EROFS:
1413 if (!(adflags & ADFLAGS_RDONLY)) {
1414 LOG(log_error, logtype_ad, "ad_open_rf_ea(\"%s\"): \"%s\"", fullpathname(path), strerror(errno));
1415 EC_FAIL;
1416 }
1417 oflags &= ~O_RDWR;
1418 oflags |= O_RDONLY;
1419 if ((ad_reso_fileno(ad) = sys_getxattrfd(ad_meta_fileno(ad), AD_EA_RESO, oflags)) == -1) {
1420 LOG(log_error, logtype_ad, "ad_open_rf_ea(\"%s\"): \"%s\"", fullpathname(path), strerror(errno));
1421 EC_FAIL;
1422 }
1423 break;
1424 case ENOENT:
1425 EC_EXIT_STATUS(0);
1426 default:
1427 LOG(log_error, logtype_ad, "ad_open_rf_ea(\"%s\"): \"%s\"", fullpathname(path), strerror(errno));
1428 EC_FAIL;
1429 }
1430 } else {
1431 oflags |= O_CREAT;
1432 EC_NEG1_LOG( ad_reso_fileno(ad) = sys_getxattrfd(ad_meta_fileno(ad),
1433 AD_EA_RESO, oflags, 0666) );
1434 }
1435 }
1436 #else
1437 EC_NULL_LOG( rfpath = ad->ad_ops->ad_path(path, adflags) );
1438 if ((ad_reso_fileno(ad) = open(rfpath, oflags)) == -1) {
1439 if (!(adflags & ADFLAGS_CREATE)) {
1440 switch (errno) {
1441 case EACCES:
1442 case EPERM:
1443 case EROFS:
1444 if (!(adflags & ADFLAGS_RDONLY)) {
1445 LOG(log_error, logtype_ad, "ad_open_rf_ea(\"%s\"): \"%s\"", fullpathname(rfpath), strerror(errno));
1446 EC_FAIL;
1447 }
1448 oflags &= ~O_RDWR;
1449 oflags |= O_RDONLY;
1450 if ((ad_reso_fileno(ad) = open(rfpath, oflags)) == -1) {
1451 LOG(log_error, logtype_ad, "ad_open_rf_ea(\"%s\"): \"%s\"", fullpathname(rfpath), strerror(errno));
1452 EC_FAIL;
1453 }
1454 break;
1455 case ENOENT:
1456 EC_EXIT_STATUS(0);
1457 default:
1458 LOG(log_error, logtype_ad, "ad_open_rf_ea(\"%s\"): \"%s\"", fullpathname(rfpath), strerror(errno));
1459 EC_FAIL;
1460 }
1461 } else {
1462 oflags |= O_CREAT;
1463 EC_NEG1_LOG( ad_reso_fileno(ad) = open(rfpath, oflags, mode) );
1464 LOG(log_debug, logtype_ad, "ad_open_rf(\"%s\"): created adouble rfork: \"%s\"",
1465 path, rfpath);
1466 }
1467 }
1468 #endif
1469 opened = 1;
1470 ad->ad_rfp->adf_refcount = 1;
1471 ad->ad_rfp->adf_flags = oflags;
1472 ad->ad_reso_refcount++;
1473
1474 #ifndef HAVE_EAFD
1475 EC_ZERO_LOG( fstat(ad_reso_fileno(ad), &st) );
1476 if (ad->ad_rfp->adf_flags & O_CREAT) {
1477 /* This is a new adouble header file, create it */
1478 LOG(log_debug, logtype_ad, "ad_open_rf(\"%s\"): created adouble rfork, initializing: \"%s\"",
1479 path, rfpath);
1480 EC_NEG1_LOG( new_ad_header(ad, path, NULL, adflags) );
1481 LOG(log_debug, logtype_ad, "ad_open_rf(\"%s\"): created adouble rfork, flushing: \"%s\"",
1482 path, rfpath);
1483 ad_flush(ad);
1484 } else {
1485 /* Read the adouble header */
1486 LOG(log_debug, logtype_ad, "ad_open_rf(\"%s\"): reading adouble rfork: \"%s\"",
1487 path, rfpath);
1488 EC_NEG1_LOG( ad_header_read_osx(rfpath, ad, &st) );
1489 }
1490 #endif
1491
1492 ad->ad_rlen = ad_reso_size(path, adflags, ad);
1493
1494 EC_CLEANUP:
1495 if (ret != 0) {
1496 if (opened && (ad_reso_fileno(ad) != -1)) {
1497 close(ad_reso_fileno(ad));
1498 ad_reso_fileno(ad) = -1;
1499 ad->ad_reso_refcount--;
1500 ad->ad_rfp->adf_refcount = 0;
1501 }
1502 if (adflags & ADFLAGS_NORF) {
1503 ret = 0;
1504 } else {
1505 int err = errno;
1506 (void)ad_close(ad, closeflags);
1507 errno = err;
1508 }
1509 ad->ad_rlen = 0;
1510 }
1511
1512 LOG(log_debug, logtype_ad, "ad_open_rf(\"%s\"): END: %d", fullpathname(path), ret);
1513
1514 EC_EXIT;
1515 }
1516
1517 /*!
1518 * Open ressource fork
1519 */
ad_open_rf(const char * path,int adflags,int mode,struct adouble * ad)1520 static int ad_open_rf(const char *path, int adflags, int mode, struct adouble *ad)
1521 {
1522 int ret = 0;
1523
1524 switch (ad->ad_vers) {
1525 case AD_VERSION2:
1526 ret = ad_open_rf_v2(path, adflags, mode, ad);
1527 break;
1528 case AD_VERSION_EA:
1529 ret = ad_open_rf_ea(path, adflags, mode, ad);
1530 break;
1531 default:
1532 ret = -1;
1533 break;
1534 }
1535
1536 return ret;
1537 }
1538
1539 /***********************************************************************************
1540 * API functions
1541 ********************************************************************************* */
1542
ad_getentryoff(const struct adouble * ad,int eid)1543 off_t ad_getentryoff(const struct adouble *ad, int eid)
1544 {
1545 if (ad->ad_vers == AD_VERSION2)
1546 return ad->ad_eid[eid].ade_off;
1547
1548 switch (eid) {
1549 case ADEID_DFORK:
1550 return 0;
1551 case ADEID_RFORK:
1552 #ifdef HAVE_EAFD
1553 return 0;
1554 #else
1555 return ad->ad_eid[eid].ade_off;
1556 #endif
1557 default:
1558 return ad->ad_eid[eid].ade_off;
1559 }
1560 /* deadc0de */
1561 AFP_PANIC("What am I doing here?");
1562 }
1563
ad_path_ea(const char * path,int adflags _U_)1564 const char *ad_path_ea( const char *path, int adflags _U_)
1565 {
1566 return path;
1567 }
1568
ad_path_osx(const char * path,int adflags _U_)1569 const char *ad_path_osx(const char *path, int adflags _U_)
1570 {
1571 static char pathbuf[ MAXPATHLEN + 1];
1572 char c, *slash, buf[MAXPATHLEN + 1];
1573
1574 if (!strcmp(path,".")) {
1575 /* fixme */
1576 getcwd(buf, MAXPATHLEN);
1577 }
1578 else {
1579 strlcpy(buf, path, MAXPATHLEN +1);
1580 }
1581 if (NULL != ( slash = strrchr( buf, '/' )) ) {
1582 c = *++slash;
1583 *slash = '\0';
1584 strlcpy( pathbuf, buf, MAXPATHLEN +1);
1585 *slash = c;
1586 } else {
1587 pathbuf[ 0 ] = '\0';
1588 slash = buf;
1589 }
1590 strlcat( pathbuf, "._", MAXPATHLEN +1);
1591 strlcat( pathbuf, slash, MAXPATHLEN +1);
1592 return pathbuf;
1593 }
1594
1595 /*
1596 * Put the .AppleDouble where it needs to be:
1597 *
1598 * / a/.AppleDouble/b
1599 * a/b
1600 * \ b/.AppleDouble/.Parent
1601 *
1602 * FIXME: should do something for pathname > MAXPATHLEN
1603 */
ad_path(const char * path,int adflags)1604 const char *ad_path( const char *path, int adflags)
1605 {
1606 static char pathbuf[ MAXPATHLEN + 1];
1607 const char *slash;
1608 size_t l ;
1609
1610 if ( adflags & ADFLAGS_DIR ) {
1611 l = strlcpy( pathbuf, path, sizeof(pathbuf));
1612
1613 if ( l && l < MAXPATHLEN) {
1614 pathbuf[l++] = '/';
1615 }
1616 strlcpy(pathbuf +l, ".AppleDouble/.Parent", sizeof(pathbuf) -l);
1617 } else {
1618 if (NULL != ( slash = strrchr( path, '/' )) ) {
1619 slash++;
1620 l = slash - path;
1621 /* XXX we must return NULL here and test in the caller */
1622 if (l > MAXPATHLEN)
1623 l = MAXPATHLEN;
1624 memcpy( pathbuf, path, l);
1625 } else {
1626 l = 0;
1627 slash = path;
1628 }
1629 l += strlcpy( pathbuf +l, ".AppleDouble/", sizeof(pathbuf) -l);
1630 strlcpy( pathbuf + l, slash, sizeof(pathbuf) -l);
1631 }
1632
1633 return( pathbuf );
1634 }
1635
1636 /* -------------------------
1637 * Support inherited protection modes for AppleDouble files. The supplied
1638 * mode is ANDed with the parent directory's mask value in lieu of "umask",
1639 * and that value is returned.
1640 */
ad_dir(const char * path)1641 char *ad_dir(const char *path)
1642 {
1643 static char modebuf[ MAXPATHLEN + 1];
1644 char *slash;
1645 /*
1646 * For a path with directories in it, remove the final component
1647 * (path or subdirectory name) to get the name we want to stat.
1648 * For a path which is just a filename, use "." instead.
1649 */
1650 slash = strrchr( path, '/' );
1651 if (slash) {
1652 size_t len;
1653
1654 len = slash - path;
1655 if (len >= MAXPATHLEN) {
1656 errno = ENAMETOOLONG;
1657 return NULL; /* can't do it */
1658 }
1659 memcpy( modebuf, path, len );
1660 modebuf[len] = '\0';
1661 /* is last char a '/' ? */
1662 if (slash[1] == 0) {
1663 slash = modebuf+ len;
1664 /* remove them */
1665 while (modebuf < slash && slash[-1] == '/') {
1666 --slash;
1667 }
1668 if (modebuf == slash) {
1669 goto use_cur;
1670 }
1671 *slash = '\0';
1672 while (modebuf < slash && *slash != '/') {
1673 --slash;
1674 }
1675 if (modebuf == slash) {
1676 goto use_cur;
1677 }
1678 *slash = '\0'; /* remove pathname component */
1679 }
1680 return modebuf;
1681 }
1682 use_cur:
1683 modebuf[0] = '.'; /* use current directory */
1684 modebuf[1] = '\0';
1685 return modebuf;
1686 }
1687
ad_setfuid(const uid_t id)1688 int ad_setfuid(const uid_t id)
1689 {
1690 default_uid = id;
1691 return 0;
1692 }
1693
1694 /* ---------------- */
ad_getfuid(void)1695 uid_t ad_getfuid(void)
1696 {
1697 return default_uid;
1698 }
1699
1700 /* ----------------
1701 stat path parent directory
1702 */
ad_stat(const char * path,struct stat * stbuf)1703 int ad_stat(const char *path, struct stat *stbuf)
1704 {
1705 char *p;
1706
1707 p = ad_dir(path);
1708 if (!p)
1709 return -1;
1710 return stat( p, stbuf );
1711 }
1712
1713 /* ----------------
1714 return access right of path parent directory
1715 */
ad_mode(const char * path,mode_t mode)1716 int ad_mode( const char *path, mode_t mode)
1717 {
1718 struct stat stbuf;
1719 ad_mode_st(path, &mode, &stbuf);
1720 return mode;
1721 }
1722
1723 /*
1724 * Use mkdir() with mode bits taken from ad_mode().
1725 */
ad_mkdir(const char * path,mode_t mode)1726 int ad_mkdir( const char *path, mode_t mode)
1727 {
1728 int ret;
1729 int st_invalid;
1730 struct stat stbuf;
1731
1732 LOG(log_debug, logtype_ad, "ad_mkdir(\"%s\", %04o) {cwd: \"%s\"}",
1733 path, mode, getcwdpath());
1734
1735 st_invalid = ad_mode_st(path, &mode, &stbuf);
1736 ret = mkdir( path, mode );
1737 if (ret || st_invalid)
1738 return ret;
1739 ad_chown(path, &stbuf);
1740
1741 return ret;
1742 }
1743
ad_init_func(struct adouble * ad)1744 static void ad_init_func(struct adouble *ad)
1745 {
1746 switch (ad->ad_vers) {
1747 case AD_VERSION2:
1748 ad->ad_ops = &ad_adouble;
1749 ad->ad_rfp = &ad->ad_resource_fork;
1750 ad->ad_mdp = &ad->ad_resource_fork;
1751 break;
1752 case AD_VERSION_EA:
1753 ad->ad_ops = &ad_adouble_ea;
1754 ad->ad_rfp = &ad->ad_resource_fork;
1755 ad->ad_mdp = &ad->ad_data_fork;
1756 break;
1757 default:
1758 AFP_PANIC("ad_init: unknown AD version");
1759 }
1760
1761
1762 ad_data_fileno(ad) = -1;
1763 ad_reso_fileno(ad) = -1;
1764 ad_meta_fileno(ad) = -1;
1765 ad->ad_refcount = 1;
1766 ad->ad_rlen = 0;
1767 return;
1768 }
1769
ad_init_old(struct adouble * ad,int flags,int options)1770 void ad_init_old(struct adouble *ad, int flags, int options)
1771 {
1772 memset(ad, 0, sizeof(struct adouble));
1773 ad->ad_vers = flags;
1774 ad->ad_options = options;
1775 ad_init_func(ad);
1776 }
1777
ad_init(struct adouble * ad,const struct vol * restrict vol)1778 void ad_init(struct adouble *ad, const struct vol * restrict vol)
1779 {
1780 memset(ad, 0, sizeof(struct adouble));
1781 ad->ad_vers = vol->v_adouble;
1782 ad->ad_options = vol->v_ad_options;
1783 ad_init_func(ad);
1784 }
1785
1786 /*!
1787 * Open data-, metadata(header)- or ressource fork
1788 *
1789 * ad_open(struct adouble *ad, const char *path, int adflags, int flags)
1790 * ad_open(struct adouble *ad, const char *path, int adflags, int flags, mode_t mode)
1791 *
1792 * You must call ad_init() before ad_open, usually you'll just call it like this: \n
1793 * @code
1794 * struct adoube ad;
1795 * ad_init(&ad, vol->v_adouble, vol->v_ad_options);
1796 * @endcode
1797 *
1798 * Open a files data fork, metadata fork or ressource fork.
1799 *
1800 * @param ad (rw) pointer to struct adouble
1801 * @param path (r) Path to file or directory
1802 * @param adflags (r) Flags specifying which fork to open, can be or'd:
1803 * ADFLAGS_DF: open data fork
1804 * ADFLAGS_RF: open ressource fork
1805 * ADFLAGS_HF: open header (metadata) file
1806 * ADFLAGS_NOHF: it's not an error if header file couldn't be opened
1807 * ADFLAGS_NORF: it's not an error if reso fork couldn't be opened
1808 * ADFLAGS_DIR: if path is a directory you MUST or ADFLAGS_DIR to adflags
1809 *
1810 * Access mode for the forks:
1811 * ADFLAGS_RDONLY: open read only
1812 * ADFLAGS_RDWR: open read write
1813 *
1814 * Creation flags:
1815 * ADFLAGS_CREATE: create if not existing
1816 * ADFLAGS_TRUNC: truncate
1817 *
1818 * Special flags:
1819 * ADFLAGS_CHECK_OF: check for open forks from us and other afpd's
1820 * ADFLAGS_SETSHRMD: this adouble struct will be used to set sharemode locks.
1821 * This basically results in the files being opened RW instead of RDONLY.
1822 * @param mode (r) mode used with O_CREATE
1823 *
1824 * The open mode flags (rw vs ro) have to take into account all the following requirements:
1825 * - we remember open fds for files because me must avoid a single close releasing fcntl locks for other
1826 * fds of the same file
1827 *
1828 * BUGS:
1829 *
1830 * * on Solaris (HAVE_EAFD) ADFLAGS_RF doesn't work without
1831 * ADFLAGS_HF, because it checks whether ad_meta_fileno() is already
1832 * openend. As a workaround pass ADFLAGS_SETSHRMD.
1833 *
1834 * @returns 0 on success, any other value indicates an error
1835 */
ad_open(struct adouble * ad,const char * path,int adflags,...)1836 int ad_open(struct adouble *ad, const char *path, int adflags, ...)
1837 {
1838 EC_INIT;
1839 va_list args;
1840 mode_t mode = 0;
1841
1842 LOG(log_debug, logtype_ad,
1843 "ad_open(\"%s\", %s): BEGIN {d: %d, m: %d, r: %d}"
1844 "[dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1845 fullpathname(path), adflags2logstr(adflags),
1846 ad->ad_data_refcount, ad->ad_meta_refcount, ad->ad_reso_refcount,
1847 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1848 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1849 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1850
1851 if (adflags & ADFLAGS_CHECK_OF)
1852 /* Checking for open forks requires sharemode lock support (ie RDWR instead of RDONLY) */
1853 adflags |= ADFLAGS_SETSHRMD;
1854
1855 if (adflags & ADFLAGS_SETSHRMD)
1856 /* sharemode locks are stored in the data fork */
1857 adflags |= ADFLAGS_DF;
1858
1859 if (ad->ad_vers == AD_VERSION2) {
1860 if (adflags & ADFLAGS_RF)
1861 adflags |= ADFLAGS_HF;
1862 if (adflags & ADFLAGS_NORF)
1863 adflags |= ADFLAGS_NOHF;
1864 }
1865
1866 if (ad->ad_inited != AD_INITED) {
1867 ad->ad_adflags = adflags;
1868 ad->ad_inited = AD_INITED;
1869 } else {
1870 ad->ad_open_forks = ((ad->ad_data_fork.adf_refcount > 0) ? ATTRBIT_DOPEN : 0);
1871 if (ad->ad_resource_fork.adf_refcount > 0)
1872 ad->ad_open_forks |= ATTRBIT_ROPEN;
1873 }
1874
1875 va_start(args, adflags);
1876 if (adflags & ADFLAGS_CREATE)
1877 mode = (sizeof(mode_t) < sizeof(int) ? va_arg (args, int) : va_arg (args, mode_t));
1878 va_end(args);
1879
1880 if (adflags & ADFLAGS_DF) {
1881 ad->ad_data_refcount++;
1882 if (ad_open_df(path, adflags, mode, ad) != 0) {
1883 ad->ad_data_refcount--;
1884 EC_FAIL;
1885 }
1886 }
1887
1888 if (adflags & ADFLAGS_HF) {
1889 if (ad_open_hf(path, adflags, mode, ad) != 0) {
1890 EC_FAIL;
1891 }
1892 }
1893
1894 if (adflags & ADFLAGS_RF) {
1895 if (ad_open_rf(path, adflags, mode, ad) != 0) {
1896 EC_FAIL;
1897 }
1898 }
1899
1900 if (adflags & ADFLAGS_CHECK_OF) {
1901 ad->ad_open_forks |= ad_openforks(ad, ad->ad_open_forks);
1902 }
1903
1904 EC_CLEANUP:
1905 LOG(log_debug, logtype_ad,
1906 "ad_open(\"%s\"): END: %d {d: %d, m: %d, r: %d}"
1907 "[dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1908 fullpathname(path), ret,
1909 ad->ad_data_refcount, ad->ad_meta_refcount, ad->ad_reso_refcount,
1910 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1911 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1912 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1913
1914 EC_EXIT;
1915 }
1916
1917 /*!
1918 * @brief open metadata, possibly as root
1919 *
1920 * Return only metadata but try very hard ie at first try as user, then try as root.
1921 *
1922 * @param name name of file/dir
1923 * @param flags ADFLAGS_DIR: name is a directory \n
1924 * ADFLAGS_CHECK_OF: test if name is open by us or another afpd process
1925 *
1926 * @param adp pointer to struct adouble
1927 */
ad_metadata(const char * name,int flags,struct adouble * adp)1928 int ad_metadata(const char *name, int flags, struct adouble *adp)
1929 {
1930 int ret, err, oflags;
1931
1932 /* Sanitize flags */
1933 oflags = (flags & (ADFLAGS_CHECK_OF | ADFLAGS_DIR)) | ADFLAGS_HF | ADFLAGS_RDONLY;
1934
1935 if ((ret = ad_open(adp, name, oflags)) < 0 && errno == EACCES) {
1936 become_root();
1937 ret = ad_open(adp, name, oflags);
1938 unbecome_root();
1939 err = errno;
1940 errno = err;
1941 }
1942
1943 return ret;
1944 }
1945
1946 /*
1947 * @brief openat like wrapper for ad_metadata
1948 */
ad_metadataat(int dirfd,const char * name,int flags,struct adouble * adp)1949 int ad_metadataat(int dirfd, const char *name, int flags, struct adouble *adp)
1950 {
1951 int ret = 0;
1952 int cwdfd = -1;
1953
1954 if (dirfd != -1) {
1955 if (((cwdfd = open(".", O_RDONLY)) == -1) || (fchdir(dirfd) != 0)) {
1956 ret = -1;
1957 goto exit;
1958 }
1959 }
1960
1961 if (ad_metadata(name, flags, adp) < 0) {
1962 ret = -1;
1963 goto exit;
1964 }
1965
1966 if (dirfd != -1) {
1967
1968 if (fchdir(cwdfd) != 0) {
1969 LOG(log_error, logtype_ad, "ad_openat: cant chdir back, exiting");
1970 exit(EXITERR_SYS);
1971 }
1972 }
1973
1974 exit:
1975 if (cwdfd != -1)
1976 close(cwdfd);
1977
1978 return ret;
1979
1980 }
1981
ad_refresh(const char * path,struct adouble * ad)1982 int ad_refresh(const char *path, struct adouble *ad)
1983 {
1984 switch (ad->ad_vers) {
1985 case AD_VERSION2:
1986 if (ad_meta_fileno(ad) == -1)
1987 return -1;
1988 return ad->ad_ops->ad_header_read(NULL, ad, NULL);
1989 break;
1990 case AD_VERSION_EA:
1991 #ifdef HAVE_EAFD
1992 if (AD_META_OPEN(ad)) {
1993 if (ad_data_fileno(ad) == -1)
1994 return -1;
1995 // TODO: read meta EA
1996 }
1997
1998 if (AD_RSRC_OPEN(ad)) {
1999 if (ad_reso_fileno(ad) == -1)
2000 return -1;
2001 struct stat st;
2002 if (fstat(ad_reso_fileno(ad), &st) == -1)
2003 return -1;
2004 ad->ad_rlen = st.st_size;
2005 }
2006 #else
2007 if (AD_META_OPEN(ad)) {
2008 if (ad_data_fileno(ad) == -1)
2009 return -1;
2010 // TODO: read meta EA
2011 }
2012 if (AD_RSRC_OPEN(ad)) {
2013 if (ad_reso_fileno(ad) == -1)
2014 return -1;
2015 if (ad_header_read_osx(path, ad, NULL) < 0)
2016 return -1;
2017 }
2018 #endif
2019 return ad->ad_ops->ad_header_read(path, ad, NULL);
2020 break;
2021 default:
2022 return -1;
2023 break;
2024 }
2025
2026 }
2027
ad_openat(struct adouble * ad,int dirfd,const char * path,int adflags,...)2028 int ad_openat(struct adouble *ad,
2029 int dirfd, /* dir fd openat like */
2030 const char *path,
2031 int adflags, ...)
2032 {
2033 EC_INIT;
2034 int cwdfd = -1;
2035 va_list args;
2036 mode_t mode = 0;
2037
2038 if (dirfd != -1) {
2039 if (((cwdfd = open(".", O_RDONLY)) == -1) || (fchdir(dirfd) != 0))
2040 EC_FAIL;
2041 }
2042
2043 va_start(args, adflags);
2044 if (adflags & ADFLAGS_CREATE)
2045 mode = (sizeof(mode_t) < sizeof(int) ? va_arg (args, int) : va_arg (args, mode_t));
2046 va_end(args);
2047
2048 EC_NEG1( ad_open(ad, path, adflags, mode) );
2049
2050 if (dirfd != -1) {
2051 if (fchdir(cwdfd) != 0) {
2052 AFP_PANIC("ad_openat: cant chdir back");
2053 }
2054 }
2055
2056 EC_CLEANUP:
2057 if (cwdfd != -1)
2058 close(cwdfd);
2059
2060 return ret;
2061 }
2062
2063 /* build a resource fork mode from the data fork mode:
2064 * remove X mode and extend header to RW if R or W (W if R for locking),
2065 */
ad_hf_mode(mode_t mode)2066 mode_t ad_hf_mode(mode_t mode)
2067 {
2068 mode &= ~(S_IXUSR | S_IXGRP | S_IXOTH);
2069 /* fnctl lock need write access */
2070 if ((mode & S_IRUSR))
2071 mode |= S_IWUSR;
2072 if ((mode & S_IRGRP))
2073 mode |= S_IWGRP;
2074 if ((mode & S_IROTH))
2075 mode |= S_IWOTH;
2076
2077 /* if write mode set add read mode */
2078 if ((mode & S_IWUSR))
2079 mode |= S_IRUSR;
2080 if ((mode & S_IWGRP))
2081 mode |= S_IRGRP;
2082 if ((mode & S_IWOTH))
2083 mode |= S_IROTH;
2084
2085 return mode;
2086 }
2087