2 * $Id: ad_open.c,v 1.30.6.18.2.6 2006-09-19 02:24:06 didg Exp $
4 * Copyright (c) 1999 Adrian Sun (asun@u.washington.edu)
5 * Copyright (c) 1990,1991 Regents of The University of Michigan.
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.
18 * Research Systems Unix Group
19 * The University of Michigan
21 * 535 W. William Street
24 * netatalk@itd.umich.edu
26 * NOTE: I don't use inline because a good compiler should be
27 * able to optimize all the static below. Didier
32 #endif /* HAVE_CONFIG_H */
36 #include <atalk/adouble.h>
37 #include <sys/param.h>
38 #include <atalk/logger.h>
40 #include <atalk/util.h>
43 #include "ad_private.h"
47 #define MAX(a, b) ((a) < (b) ? (b) : (a))
51 * AppleDouble entry default offsets.
52 * The layout looks like this:
54 * this is the v1 layout:
56 * | NAME | COMMENT | FILEI | FINDERI | RFORK |
58 * we need to change it to look like this:
61 * field length (in bytes)
64 * FILEDATESI 16 replaces FILEI
68 * SHORTNAME 12 8.3 new
71 * so, all we need to do is replace FILEI with FILEDATESI, move RFORK,
72 * and add in the new fields.
74 * NOTE: the HFS module will need similar modifications to interact with
78 #define ADEDOFF_MAGIC (0)
79 #define ADEDOFF_VERSION (ADEDOFF_MAGIC + ADEDLEN_MAGIC)
80 #define ADEDOFF_FILLER (ADEDOFF_VERSION + ADEDLEN_VERSION)
81 #define ADEDOFF_NENTRIES (ADEDOFF_FILLER + ADEDLEN_FILLER)
83 /* initial lengths of some of the fields */
84 #define ADEDLEN_INIT 0
86 /* make sure we don't redefine ADEDOFF_FILEI */
89 #endif /* ADEDOFF_FILEI */
91 #define ADEDOFF_NAME_V1 (AD_HEADER_LEN + ADEID_NUM_V1*AD_ENTRY_LEN)
92 #define ADEDOFF_COMMENT_V1 (ADEDOFF_NAME_V1 + ADEDLEN_NAME)
93 #define ADEDOFF_FILEI (ADEDOFF_COMMENT_V1 + ADEDLEN_COMMENT)
94 #define ADEDOFF_FINDERI_V1 (ADEDOFF_FILEI + ADEDLEN_FILEI)
95 #define ADEDOFF_RFORK_V1 (ADEDOFF_FINDERI_V1 + ADEDLEN_FINDERI)
97 /* i stick things in a slightly different order than their eid order in
98 * case i ever want to separate RootInfo behaviour from the rest of the
100 #define ADEDOFF_NAME_V2 (AD_HEADER_LEN + ADEID_NUM_V2*AD_ENTRY_LEN)
101 #define ADEDOFF_COMMENT_V2 (ADEDOFF_NAME_V2 + ADEDLEN_NAME)
102 #define ADEDOFF_FILEDATESI (ADEDOFF_COMMENT_V2 + ADEDLEN_COMMENT)
103 #define ADEDOFF_FINDERI_V2 (ADEDOFF_FILEDATESI + ADEDLEN_FILEDATESI)
104 #define ADEDOFF_DID (ADEDOFF_FINDERI_V2 + ADEDLEN_FINDERI)
105 #define ADEDOFF_AFPFILEI (ADEDOFF_DID + ADEDLEN_DID)
106 #define ADEDOFF_SHORTNAME (ADEDOFF_AFPFILEI + ADEDLEN_AFPFILEI)
107 #define ADEDOFF_PRODOSFILEI (ADEDOFF_SHORTNAME + ADEDLEN_SHORTNAME)
108 #define ADEDOFF_PRIVDEV (ADEDOFF_PRODOSFILEI + ADEDLEN_PRODOSFILEI)
109 #define ADEDOFF_PRIVINO (ADEDOFF_PRIVDEV + ADEDLEN_PRIVDEV)
110 #define ADEDOFF_PRIVSYN (ADEDOFF_PRIVINO + ADEDLEN_PRIVINO)
111 #define ADEDOFF_PRIVID (ADEDOFF_PRIVSYN + ADEDLEN_PRIVSYN)
113 #define ADEDOFF_RFORK_V2 (ADEDOFF_PRIVID + ADEDLEN_PRIVID)
115 #define ADEID_NUM_OSX 2
116 #define ADEDOFF_FINDERI_OSX (AD_HEADER_LEN + ADEID_NUM_OSX*AD_ENTRY_LEN)
117 #define ADEDOFF_RFORK_OSX (ADEDOFF_FINDERI_OSX + ADEDLEN_FINDERI)
119 /* we keep local copies of a bunch of stuff so that we can initialize things
122 /* invisible bit for dot files */
123 #define ATTRBIT_INVISIBLE (1 << 0)
125 /* this is to prevent changing timezones from causing problems with
126 localtime volumes. the screw-up is 30 years. we use a delta of 5
128 #define TIMEWARP_DELTA 157680000
132 u_int32_t id, offset, len;
135 static const struct entry entry_order1[ADEID_NUM_V1 +1] = {
136 {ADEID_NAME, ADEDOFF_NAME_V1, ADEDLEN_INIT}, /* 3 */
137 {ADEID_COMMENT, ADEDOFF_COMMENT_V1, ADEDLEN_INIT}, /* 4 */
138 {ADEID_FILEI, ADEDOFF_FILEI, ADEDLEN_FILEI}, /* 7 */
139 {ADEID_FINDERI, ADEDOFF_FINDERI_V1, ADEDLEN_FINDERI}, /* 9 */
140 {ADEID_RFORK, ADEDOFF_RFORK_V1, ADEDLEN_INIT}, /* 2 */
144 #if AD_VERSION == AD_VERSION1
145 #define DISK_EID(ad, a) (a)
147 #else /* AD_VERSION == AD_VERSION2 */
149 static u_int32_t get_eid(struct adouble *ad, u_int32_t eid)
153 if (ad->ad_version == AD_VERSION1)
156 return ADEID_PRIVDEV;
158 return ADEID_PRIVINO;
160 return ADEID_PRIVSYN;
167 #define DISK_EID(ad, a) get_eid(ad, a)
169 static const struct entry entry_order2[ADEID_NUM_V2 +1] = {
170 {ADEID_NAME, ADEDOFF_NAME_V2, ADEDLEN_INIT},
171 {ADEID_COMMENT, ADEDOFF_COMMENT_V2, ADEDLEN_INIT},
172 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI, ADEDLEN_FILEDATESI},
173 {ADEID_FINDERI, ADEDOFF_FINDERI_V2, ADEDLEN_FINDERI},
174 {ADEID_DID, ADEDOFF_DID, ADEDLEN_DID},
175 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI, ADEDLEN_AFPFILEI},
176 {ADEID_SHORTNAME, ADEDOFF_SHORTNAME, ADEDLEN_INIT},
177 {ADEID_PRODOSFILEI, ADEDOFF_PRODOSFILEI, ADEDLEN_PRODOSFILEI},
178 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV, ADEDLEN_INIT},
179 {ADEID_PRIVINO, ADEDOFF_PRIVINO, ADEDLEN_INIT},
180 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN, ADEDLEN_INIT},
181 {ADEID_PRIVID, ADEDOFF_PRIVID, ADEDLEN_INIT},
182 {ADEID_RFORK, ADEDOFF_RFORK_V2, ADEDLEN_INIT},
187 /* OS X adouble finder info and resource fork only
189 static const struct entry entry_order_osx[ADEID_NUM_OSX +1] = {
190 {ADEID_FINDERI, ADEDOFF_FINDERI_OSX, ADEDLEN_FINDERI},
191 {ADEID_RFORK, ADEDOFF_RFORK_OSX, ADEDLEN_INIT},
196 #endif /* AD_VERSION == AD_VERSION2 */
198 #if AD_VERSION == AD_VERSION2
200 /* update a version 2 adouble resource fork with our private entries */
201 static int ad_update(struct adouble *ad, const char *path)
204 u_int16_t nentries = 0;
205 off_t off, shiftdata=0;
206 const struct entry *eid;
207 static off_t entry_len[ADEID_MAX];
208 static char databuf[ADEID_MAX][256], *buf;
212 /* check to see if we should convert this header. */
213 if (!path || ad->ad_flags != AD_VERSION2)
216 if (!(ad->ad_hf.adf_flags & O_RDWR)) {
217 /* we were unable to open the file read write the last time */
221 if (ad->ad_eid[ADEID_RFORK].ade_off) {
222 shiftdata = ADEDOFF_RFORK_V2 -ad->ad_eid[ADEID_RFORK].ade_off;
225 memcpy(&nentries, ad->ad_data + ADEDOFF_NENTRIES, sizeof( nentries ));
226 nentries = ntohs( nentries );
228 if ( shiftdata == 0 && nentries == ADEID_NUM_V2)
231 memset(entry_len, 0, sizeof(entry_len));
232 memset(databuf, 0, sizeof(databuf));
234 /* bail if we can't get a lock */
235 if (ad_tmplock(ad, ADEID_RFORK, ADLOCK_WR, 0, 0, 0) < 0)
238 fd = ad->ad_hf.adf_fd;
240 if (fstat(fd, &st)) {
244 if (st.st_size > 0x7fffffff) {
245 LOG(log_debug, logtype_default, "ad_update: file '%s' too big for update.", path);
250 off = ad->ad_eid[ADEID_RFORK].ade_off;
251 if (off > st.st_size) {
252 LOG(log_error, logtype_default, "ad_update: invalid resource fork offset. (off: %u)", off);
257 if (ad->ad_eid[ADEID_RFORK].ade_len > st.st_size - off) {
258 LOG(log_error, logtype_default, "ad_update: invalid resource fork length. (rfork len: %u)", ad->ad_eid[ADEID_RFORK].ade_len);
263 if ((void *) (buf = (char *)
264 mmap(NULL, st.st_size + shiftdata,
265 PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
270 /* last place for failure. */
271 if (sys_ftruncate(fd, st.st_size + shiftdata) < 0) {
275 /* move the RFORK. this assumes that the RFORK is at the end */
277 memmove(buf + ADEDOFF_RFORK_V2, buf + off, ad->ad_eid[ADEID_RFORK].ade_len);
280 munmap(buf, st.st_size + shiftdata);
282 /* now, fix up our copy of the header */
283 memset(ad->ad_filler, 0, sizeof(ad->ad_filler));
285 /* save the header entries */
288 if( ad->ad_eid[eid->id].ade_off != 0) {
289 if ( eid->id > 2 && ad->ad_eid[eid->id].ade_len < 256)
290 memcpy( databuf[eid->id], ad->ad_data +ad->ad_eid[eid->id].ade_off, ad->ad_eid[eid->id].ade_len);
291 entry_len[eid->id] = ad->ad_eid[eid->id].ade_len;
296 memset(ad->ad_data + AD_HEADER_LEN, 0, AD_DATASZ - AD_HEADER_LEN);
298 /* copy the saved entries to the new header */
301 if ( eid->id > 2 && entry_len[eid->id] > 0) {
302 memcpy(ad->ad_data+eid->offset, databuf[eid->id], entry_len[eid->id]);
304 ad->ad_eid[eid->id].ade_off = eid->offset;
305 ad->ad_eid[eid->id].ade_len = entry_len[eid->id];
309 /* rebuild the header and cleanup */
310 LOG(log_debug, logtype_default, "updated AD2 header %s", path);
311 ad_flush(ad, ADFLAGS_HF );
315 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
320 /* ------------------------------------------
321 FIXME work only if < 2GB
323 static int ad_convert(struct adouble *ad, const char *path)
330 /* use resource fork offset from file */
339 if (!(ad->ad_hf.adf_flags & ( O_RDWR))) {
340 /* we were unable to open the file read write the last time */
344 /* check to see if we should convert this header. */
345 toV2 = ad->ad_version == AD_VERSION1 && ad->ad_flags == AD_VERSION2;
346 toV1 = ad->ad_version == AD_VERSION2 && ad->ad_flags == AD_VERSION1;
351 /* convert from v1 to v2. what does this mean?
352 * 1) change FILEI into FILEDATESI
353 * 2) create space for SHORTNAME, AFPFILEI, DID, and PRODOSI
354 * 3) move FILEI attributes into AFPFILEI
355 * 4) initialize ACCESS field of FILEDATESI.
356 * 5) move the resource fork
359 /* bail if we can't get a lock */
360 if (ad_tmplock(ad, ADEID_RFORK, ADLOCK_WR, 0, 0, 0) < 0)
363 /* we reuse fd from the resource fork */
364 fd = ad->ad_hf.adf_fd;
366 if (ad->ad_eid[ADEID_RFORK].ade_off) {
367 shiftdata = ADEDOFF_RFORK_V2 -ad->ad_eid[ADEID_RFORK].ade_off;
370 shiftdata = ADEDOFF_RFORK_V2 -ADEDOFF_RFORK_V1; /* 136 */
373 if (fstat(fd, &st)) {
377 if (st.st_size > 0x7fffffff -shiftdata) {
378 LOG(log_debug, logtype_default, "ad_v1tov2: file too big.");
383 off = ad->ad_eid[ADEID_RFORK].ade_off;
385 if (off > st.st_size) {
386 LOG(log_error, logtype_default, "ad_v1tov2: invalid resource fork offset. (off: %u)", off);
391 if (ad->ad_eid[ADEID_RFORK].ade_len > st.st_size - off) {
392 LOG(log_error, logtype_default, "ad_v1tov2: invalid resource fork length. (rfork len: %u)", ad->ad_eid[ADEID_RFORK].ade_len);
397 if ((void *) (buf = (char *)
398 mmap(NULL, st.st_size + shiftdata,
399 PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
404 /* last place for failure. */
406 if (sys_ftruncate(fd, st.st_size + shiftdata) < 0) {
410 /* move the RFORK. this assumes that the RFORK is at the end */
412 memmove(buf + ADEDOFF_RFORK_V2, buf + off, ad->ad_eid[ADEID_RFORK].ade_len);
415 munmap(buf, st.st_size + shiftdata);
417 /* now, fix up our copy of the header */
418 memset(ad->ad_filler, 0, sizeof(ad->ad_filler));
420 /* replace FILEI with FILEDATESI */
421 ad_getattr(ad, &attr);
422 ad->ad_eid[ADEID_FILEDATESI].ade_off = ADEDOFF_FILEDATESI;
423 ad->ad_eid[ADEID_FILEDATESI].ade_len = ADEDLEN_FILEDATESI;
424 ad->ad_eid[ADEID_FILEI].ade_off = 0;
425 ad->ad_eid[ADEID_FILEI].ade_len = 0;
427 /* add in the new entries */
428 ad->ad_eid[ADEID_DID].ade_off = ADEDOFF_DID;
429 ad->ad_eid[ADEID_DID].ade_len = ADEDLEN_DID;
430 ad->ad_eid[ADEID_AFPFILEI].ade_off = ADEDOFF_AFPFILEI;
431 ad->ad_eid[ADEID_AFPFILEI].ade_len = ADEDLEN_AFPFILEI;
432 ad->ad_eid[ADEID_SHORTNAME].ade_off = ADEDOFF_SHORTNAME;
433 ad->ad_eid[ADEID_SHORTNAME].ade_len = ADEDLEN_INIT;
434 ad->ad_eid[ADEID_PRODOSFILEI].ade_off = ADEDOFF_PRODOSFILEI;
435 ad->ad_eid[ADEID_PRODOSFILEI].ade_len = ADEDLEN_PRODOSFILEI;
437 ad->ad_eid[ADEID_PRIVDEV].ade_off = ADEDOFF_PRIVDEV;
438 ad->ad_eid[ADEID_PRIVDEV].ade_len = ADEDLEN_INIT;
439 ad->ad_eid[ADEID_PRIVINO].ade_off = ADEDOFF_PRIVINO;
440 ad->ad_eid[ADEID_PRIVINO].ade_len = ADEDLEN_INIT;
441 ad->ad_eid[ADEID_PRIVSYN].ade_off = ADEDOFF_PRIVSYN;
442 ad->ad_eid[ADEID_PRIVSYN].ade_len = ADEDLEN_INIT;
443 ad->ad_eid[ADEID_PRIVID].ade_off = ADEDOFF_PRIVID;
444 ad->ad_eid[ADEID_PRIVID].ade_len = ADEDLEN_INIT;
446 /* shift the old entries (NAME, COMMENT, FINDERI, RFORK) */
447 ad->ad_eid[ADEID_NAME].ade_off = ADEDOFF_NAME_V2;
448 ad->ad_eid[ADEID_COMMENT].ade_off = ADEDOFF_COMMENT_V2;
449 ad->ad_eid[ADEID_FINDERI].ade_off = ADEDOFF_FINDERI_V2;
450 ad->ad_eid[ADEID_RFORK].ade_off = ADEDOFF_RFORK_V2;
452 /* switch to dest version */
453 ad->ad_version = (toV2)?AD_VERSION2:AD_VERSION1;
455 /* move our data buffer to make space for the new entries. */
456 memmove(ad->ad_data + ADEDOFF_NAME_V2, ad->ad_data + ADEDOFF_NAME_V1,
457 ADEDOFF_RFORK_V1 - ADEDOFF_NAME_V1);
459 /* now, fill in the space with appropriate stuff. we're
460 operating as a v2 file now. */
461 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, st.st_mtime);
462 memset(ad_entry(ad, ADEID_DID), 0, ADEDLEN_DID);
463 memset(ad_entry(ad, ADEID_AFPFILEI), 0, ADEDLEN_AFPFILEI);
464 ad_setattr(ad, attr);
465 memset(ad_entry(ad, ADEID_SHORTNAME), 0, ADEDLEN_SHORTNAME);
466 memset(ad_entry(ad, ADEID_PRODOSFILEI), 0, ADEDLEN_PRODOSFILEI);
468 /* rebuild the header and cleanup */
469 ad_flush(ad, ADFLAGS_HF );
473 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
477 #endif /* AD_VERSION == AD_VERSION2 */
479 /* --------------------------- */
481 mode_t ad_hf_mode (mode_t mode)
483 /* we always need RW mode for file owner */
487 mode &= ~(S_IXUSR | S_IXGRP | S_IXOTH);
488 /* fnctl lock need write access */
489 if ((mode & S_IRUSR))
491 if ((mode & S_IRGRP))
493 if ((mode & S_IROTH))
495 /* if write mode set add read mode */
496 if ((mode & S_IWUSR))
498 if ((mode & S_IWGRP))
500 if ((mode & S_IWOTH))
508 /* -------------------------------------
511 static void parse_entries(struct adouble *ad, char *buf,
514 u_int32_t eid, len, off;
517 /* now, read in the entry bits */
518 for (; nentries > 0; nentries-- ) {
519 memcpy(&eid, buf, sizeof( eid ));
520 eid = DISK_EID(ad, ntohl( eid ));
521 buf += sizeof( eid );
522 memcpy(&off, buf, sizeof( off ));
524 buf += sizeof( off );
525 memcpy(&len, buf, sizeof( len ));
527 buf += sizeof( len );
529 if (eid && eid < ADEID_MAX && ( (off < sizeof(ad->ad_data) &&
530 off +len <= sizeof(ad->ad_data)) || eid == ADEID_RFORK)) {
531 ad->ad_eid[ eid ].ade_off = off;
532 ad->ad_eid[ eid ].ade_len = len;
533 } else if (!warning) {
535 LOG(log_debug, logtype_default, "ad_refresh: nentries %hd eid %d",
542 /* this reads enough of the header so that we can figure out all of
543 * the entry lengths and offsets. once that's done, we just read/mmap
544 * the rest of the header in.
546 * NOTE: we're assuming that the resource fork is kept at the end of
547 * the file. also, mmapping won't work for the hfs fs until it
548 * understands how to mmap header files. */
549 static int ad_header_read(struct adouble *ad, struct stat *hst)
551 char *buf = ad->ad_data;
555 static int warning = 0;
558 /* read the header */
559 if ((header_len = adf_pread( &ad->ad_hf, buf, sizeof(ad->ad_data), 0)) < 0) {
562 if (header_len < AD_HEADER_LEN) {
567 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
568 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
570 /* tag broken v1 headers. just assume they're all right.
571 * we detect two cases: null magic/version
572 * byte swapped magic/version
573 * XXX: in the future, you'll need the v1compat flag.
574 * (ad->ad_flags & ADFLAGS_V1COMPAT) */
575 if (!ad->ad_magic && !ad->ad_version) {
577 LOG(log_debug, logtype_default, "notice: fixing up null v1 magic/version.");
580 ad->ad_magic = AD_MAGIC;
581 ad->ad_version = AD_VERSION1;
583 } else if (ad->ad_magic == AD_MAGIC && ad->ad_version == AD_VERSION1) {
585 LOG(log_debug, logtype_default, "notice: fixing up byte-swapped v1 magic/version.");
590 ad->ad_magic = ntohl( ad->ad_magic );
591 ad->ad_version = ntohl( ad->ad_version );
594 if ((ad->ad_magic != AD_MAGIC) || ((ad->ad_version != AD_VERSION1)
595 #if AD_VERSION == AD_VERSION2
596 && (ad->ad_version != AD_VERSION2)
597 #endif /* AD_VERSION == AD_VERSION2 */
600 LOG(log_debug, logtype_default, "ad_open: can't parse AppleDouble header.");
604 memcpy(ad->ad_filler, buf + ADEDOFF_FILLER, sizeof( ad->ad_filler ));
605 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
606 nentries = ntohs( nentries );
608 /* read in all the entry headers. if we have more than the
609 * maximum, just hope that the rfork is specified early on. */
610 len = nentries*AD_ENTRY_LEN;
612 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
613 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
615 buf += AD_HEADER_LEN;
616 if (len > header_len - AD_HEADER_LEN) {
618 LOG(log_debug, logtype_default, "ad_header_read: can't read entry info.");
622 /* figure out all of the entry offsets and lengths. if we aren't
623 * able to read a resource fork entry, bail. */
624 nentries = len / AD_ENTRY_LEN;
625 parse_entries(ad, buf, nentries);
626 if (!ad_getentryoff(ad, ADEID_RFORK)
627 || (ad_getentryoff(ad, ADEID_RFORK) > sizeof(ad->ad_data))
630 LOG(log_debug, logtype_default, "ad_header_read: problem with rfork entry offset.");
634 if (ad_getentryoff(ad, ADEID_RFORK) > header_len) {
636 LOG(log_debug, logtype_default, "ad_header_read: can't read in entries.");
642 if (fstat(ad->ad_hf.adf_fd, &st) < 0) {
643 return 1; /* fail silently */
646 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
648 /* fix up broken dates */
649 if (ad->ad_version == AD_VERSION1) {
652 /* check to see if the ad date is wrong. just see if we have
653 * a modification date in the future. */
654 if (((ad_getdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, &aint)) == 0) &&
655 (aint > TIMEWARP_DELTA + hst->st_mtime)) {
656 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, aint - AD_DATE_DELTA);
657 ad_getdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, &aint);
658 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, aint - AD_DATE_DELTA);
659 ad_getdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, &aint);
660 ad_setdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, aint - AD_DATE_DELTA);
667 /* ---------------------------------------
668 * Put the .AppleDouble where it needs to be:
672 * \ b/.AppleDouble/.Parent
674 * FIXME: should do something for pathname > MAXPATHLEN
677 ad_path( path, adflags )
681 static char pathbuf[ MAXPATHLEN + 1];
682 char c, *slash, buf[MAXPATHLEN + 1];
685 l = strlcpy(buf, path, MAXPATHLEN +1);
686 if ( adflags & ADFLAGS_DIR ) {
687 strcpy( pathbuf, buf);
688 if ( *buf != '\0' && l < MAXPATHLEN) {
694 if (NULL != ( slash = strrchr( buf, '/' )) ) {
697 strcpy( pathbuf, buf);
704 strlcat( pathbuf, ".AppleDouble/", MAXPATHLEN +1);
705 strlcat( pathbuf, slash, MAXPATHLEN +1);
710 /* ---------------------------------------
711 * Put the resource fork where it needs to be:
715 ad_path_osx( path, adflags )
719 static char pathbuf[ MAXPATHLEN + 1];
720 char c, *slash, buf[MAXPATHLEN + 1];
722 if (!strcmp(path,".")) {
724 getcwd(buf, MAXPATHLEN);
727 strlcpy(buf, path, MAXPATHLEN +1);
729 if (NULL != ( slash = strrchr( buf, '/' )) ) {
732 strlcpy( pathbuf, buf, MAXPATHLEN +1);
738 strlcat( pathbuf, "._", MAXPATHLEN +1);
739 strlcat( pathbuf, slash, MAXPATHLEN +1);
744 * Support inherited protection modes for AppleDouble files. The supplied
745 * mode is ANDed with the parent directory's mask value in lieu of "umask",
746 * and that value is returned.
749 #define DEFMASK 07700 /* be conservative */
755 static char modebuf[ MAXPATHLEN + 1];
759 if ( (len = strlen( path )) >= MAXPATHLEN ) {
760 errno = ENAMETOOLONG;
761 return NULL; /* can't do it */
765 * For a path with directories in it, remove the final component
766 * (path or subdirectory name) to get the name we want to stat.
767 * For a path which is just a filename, use "." instead.
769 strcpy( modebuf, path );
770 slash = strrchr( modebuf, '/' );
771 /* is last char a '/' */
772 if (slash && slash[1] == 0) {
773 while (modebuf < slash && slash[-1] == '/') {
776 if (modebuf < slash) {
777 *slash = '\0'; /* remove pathname component */
778 slash = strrchr( modebuf, '/' );
782 *slash = '\0'; /* remove pathname component */
784 modebuf[0] = '.'; /* use current directory */
790 /* ---------------- */
791 static uid_t default_uid = -1;
793 int ad_setfuid(const uid_t id)
799 /* ---------------- */
800 uid_t ad_getfuid(void)
806 return inode of path parent directory
808 int ad_stat(const char *path, struct stat *stbuf)
817 return stat( p, stbuf );
821 if we are root change path user/ group
822 It can be a native function for BSD cf. FAQ.Q10
823 path: pathname to chown
824 stbuf: parent directory inode
826 use fstat and fchown or lchown with linux?
828 #define EMULATE_SUIDDIR
830 static int ad_chown(const char *path, struct stat *stbuf)
833 #ifdef EMULATE_SUIDDIR
836 if (default_uid != -1) {
837 /* we are root (admin) */
838 id = (default_uid)?default_uid:stbuf->st_uid;
839 ret = chown( path, id, stbuf->st_gid );
846 return access right and inode of path parent directory
848 static int ad_mode_st(const char *path, int *mode, struct stat *stbuf)
853 if (ad_stat(path, stbuf) != 0) {
857 *mode &= stbuf->st_mode;
862 return access right of path parent directory
865 ad_mode( path, mode )
870 ad_mode_st(path, &mode, &stbuf);
875 * Use mkdir() with mode bits taken from ad_mode().
878 ad_mkdir( path, mode )
887 LOG(log_info, logtype_default, "ad_mkdir: Creating directory with mode %d", mode);
890 st_invalid = ad_mode_st(path, &mode, &stbuf);
891 ret = mkdir( path, mode );
892 if (ret || st_invalid)
894 ad_chown(path, &stbuf);
899 /* ----------------- */
900 static int ad_error(struct adouble *ad, int adflags)
903 if ((adflags & ADFLAGS_NOHF)) {
904 /* FIXME double check : set header offset ?*/
907 if ((adflags & ADFLAGS_DF)) {
908 ad_close( ad, ADFLAGS_DF );
914 static int new_rfork(const char *path, struct adouble *ad, int adflags);
919 #define AD_SET(a) a = 0
922 void ad_init(struct adouble *ad, int flags, int options)
924 memset( ad, 0, sizeof( struct adouble ) );
925 ad->ad_flags = flags;
926 if (flags == AD_VERSION2_OSX) {
927 ad->ad_path = ad_path_osx;
930 ad->ad_path = ad_path;
932 ad->ad_options = options;
935 /* -------------------
936 * It's not possible to open the header file O_RDONLY -- the read
937 * will fail and return an error. this refcounts things now.
939 int ad_open( path, adflags, oflags, mode, ad )
941 int adflags, oflags, mode;
950 if (ad->ad_inited != AD_INITED) {
953 adf_lock_init(&ad->ad_df);
954 adf_lock_init(&ad->ad_hf);
955 ad->ad_inited = AD_INITED;
959 if ((adflags & ADFLAGS_DF)) {
960 if (ad_dfileno(ad) == -1) {
961 hoflags = (oflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
963 if ((oflags & O_CREAT)) {
964 st_invalid = ad_mode_st(path, &admode, &st);
965 if ((ad->ad_options & ADVOL_UNIXPRIV)) {
969 ad->ad_df.adf_fd =open( path, hoflags, admode );
970 if (ad->ad_df.adf_fd < 0 ) {
971 if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
973 ad->ad_df.adf_fd = open( path, hoflags, admode );
976 if ( ad->ad_df.adf_fd < 0)
979 AD_SET(ad->ad_df.adf_off);
980 ad->ad_df.adf_flags = hoflags;
982 /* just created, set owner if admin (root) */
987 /* the file is already open... but */
988 if ((oflags & ( O_RDWR | O_WRONLY)) && /* we want write access */
989 !(ad->ad_df.adf_flags & ( O_RDWR | O_WRONLY))) /* and it was denied the first time */
995 * for now ad_open is never called with O_TRUNC or O_EXCL if the file is
996 * already open. Should we check for it? ie
998 * O_TRUNC --> truncate the fork.
999 * idem for ressource fork.
1002 open_df = ADFLAGS_DF;
1003 ad->ad_df.adf_refcount++;
1006 if (!(adflags & ADFLAGS_HF))
1009 if (ad_hfileno(ad) != -1) { /* the file is already open */
1010 if ((oflags & ( O_RDWR | O_WRONLY)) &&
1011 !(ad->ad_hf.adf_flags & ( O_RDWR | O_WRONLY))) {
1013 /* don't call with ADFLAGS_HF because we didn't open ressource fork */
1014 ad_close( ad, open_df );
1020 ad->ad_hf.adf_refcount++;
1024 ad_p = ad->ad_path( path, adflags );
1026 hoflags = oflags & ~O_CREAT;
1027 if (!(adflags & ADFLAGS_RDONLY)) {
1028 hoflags = (hoflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
1030 ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 );
1031 if (ad->ad_hf.adf_fd < 0 ) {
1032 if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
1033 hoflags = oflags & ~O_CREAT;
1034 ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 );
1038 if ( ad->ad_hf.adf_fd < 0 ) {
1039 if (errno == ENOENT && (oflags & O_CREAT) ) {
1041 * We're expecting to create a new adouble header file,
1043 * if ((oflags & O_CREAT) ==> (oflags & O_RDWR)
1047 st_invalid = ad_mode_st(ad_p, &admode, &st);
1048 if ((ad->ad_options & ADVOL_UNIXPRIV)) {
1051 admode = ad_hf_mode(admode);
1052 if ( errno == ENOENT && !(adflags & ADFLAGS_NOADOUBLE) && ad->ad_flags != AD_VERSION2_OSX) {
1054 * Probably .AppleDouble doesn't exist, try to
1057 if (NULL == ( slash = strrchr( ad_p, '/' )) ) {
1058 return ad_error(ad, adflags);
1062 if ( ad_mkdir( ad_p, 0777 ) < 0 ) {
1063 return ad_error(ad, adflags);
1067 st_invalid = ad_mode_st(ad_p, &admode, &st);
1068 if ((ad->ad_options & ADVOL_UNIXPRIV)) {
1071 admode = ad_hf_mode(admode);
1073 /* retry with O_CREAT */
1074 ad->ad_hf.adf_fd = open( ad_p, oflags,admode );
1075 if ( ad->ad_hf.adf_fd < 0 ) {
1076 return ad_error(ad, adflags);
1078 ad->ad_hf.adf_flags = oflags;
1079 /* just created, set owner if admin owner (root) */
1081 ad_chown(ad_p, &st);
1085 return ad_error(ad, adflags);
1087 } else if (fstat(ad->ad_hf.adf_fd, &st) == 0 && st.st_size == 0) {
1088 /* for 0 length files, treat them as new. */
1089 ad->ad_hf.adf_flags = hoflags| O_TRUNC;
1091 ad->ad_hf.adf_flags = hoflags;
1093 AD_SET(ad->ad_hf.adf_off);
1095 memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
1096 ad->ad_hf.adf_refcount++;
1097 if ((ad->ad_hf.adf_flags & ( O_TRUNC | O_CREAT ))) {
1099 * This is a new adouble header file. Initialize the structure,
1100 * instead of reading it.
1102 if (new_rfork(path, ad, adflags) < 0) {
1104 /* the file is already deleted, perm, whatever, so return an error*/
1105 ad_close(ad, adflags);
1110 /* Read the adouble header in and parse it.*/
1111 if ((ad_header_read( ad , &st) < 0)
1112 #if AD_VERSION == AD_VERSION2
1113 || (ad_convert(ad, ad_p) < 0) || (ad_update(ad, ad_p) < 0)
1114 #endif /* AD_VERSION == AD_VERSION2 */
1118 ad_close( ad, adflags );
1126 /* -----------------------------------
1127 * return only metadata but try very hard
1129 int ad_metadata(const char *name, int flags, struct adouble *adp)
1134 if ((ret = ad_open(name, ADFLAGS_HF | (flags), O_RDONLY, 0, adp)) < 0 && errno == EACCES) {
1137 LOG(log_error, logtype_default, "ad_metadata(%s): seteuid failed %s", name, strerror(errno));
1141 /* we are root open read only */
1142 ret = ad_open(name, ADFLAGS_HF|ADFLAGS_RDONLY|(flags), O_RDONLY, 0, adp);
1144 if ( seteuid(uid) < 0) {
1145 LOG(log_error, logtype_default, "ad_metadata: can't seteuid back");
1153 /* ----------------------------------- */
1154 static int new_rfork(const char *path, struct adouble *ad, int adflags)
1156 const struct entry *eid;
1160 ad->ad_magic = AD_MAGIC;
1161 ad->ad_version = ad->ad_flags & 0x0f0000;
1162 if (!ad->ad_version) {
1163 ad->ad_version = AD_VERSION;
1166 memset(ad->ad_filler, 0, sizeof( ad->ad_filler ));
1167 memset(ad->ad_data, 0, sizeof(ad->ad_data));
1169 #if AD_VERSION == AD_VERSION2
1170 if (ad->ad_flags == AD_VERSION2)
1172 else if (ad->ad_flags == AD_VERSION2_OSX)
1173 eid = entry_order_osx;
1179 ad->ad_eid[eid->id].ade_off = eid->offset;
1180 ad->ad_eid[eid->id].ade_len = eid->len;
1184 /* put something sane in the directory finderinfo */
1185 if ((adflags & ADFLAGS_DIR)) {
1186 /* set default view */
1187 ashort = htons(FINDERINFO_CLOSEDVIEW);
1188 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRVIEWOFF,
1189 &ashort, sizeof(ashort));
1191 /* set default creator/type fields */
1192 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRTYPEOFF,"\0\0\0\0", 4);
1193 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRCREATOFF,"\0\0\0\0", 4);
1196 /* make things invisible */
1197 if ((ad->ad_options & ADVOL_INVDOTS) && (*path == '.') && strcmp(path, ".") && strcmp(path, "..")) {
1198 ashort = htons(ATTRBIT_INVISIBLE);
1199 ad_setattr(ad, ashort);
1200 ashort = htons(FINDERINFO_INVISIBLE);
1201 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRFLAGOFF, &ashort, sizeof(ashort));
1204 if (stat(path, &st) < 0) {
1208 /* put something sane in the date fields */
1209 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, st.st_mtime);
1210 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, st.st_mtime);
1211 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, st.st_mtime);
1212 ad_setdate(ad, AD_DATE_BACKUP, AD_DATE_START);
1216 /* to do this with mmap, we need the hfs fs to understand how to mmap
1218 int ad_refresh(struct adouble *ad)
1221 if (ad->ad_hf.adf_fd < 0)
1224 return ad_header_read(ad, NULL);