2 * $Id: ad_open.c,v 1.30.6.14 2004-05-11 08:28:33 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 /* Bits in the finderinfo data.
123 * see etc/afpd/{directory.c,file.c} for the finderinfo structure
125 #define FINDERINFO_CUSTOMICON 0x4
126 #define FINDERINFO_CLOSEDVIEW 0x100
128 /* offsets in finderinfo */
129 #define FINDERINFO_FRTYPEOFF 0
130 #define FINDERINFO_FRCREATOFF 4
131 #define FINDERINFO_FRFLAGOFF 8
132 #define FINDERINFO_FRVIEWOFF 14
134 /* invisible bit for dot files */
135 #define ATTRBIT_INVISIBLE (1 << 0)
136 #define FINDERINFO_INVISIBLE (1 << 14)
138 /* this is to prevent changing timezones from causing problems with
139 localtime volumes. the screw-up is 30 years. we use a delta of 5
141 #define TIMEWARP_DELTA 157680000
145 u_int32_t id, offset, len;
148 static const struct entry entry_order1[ADEID_NUM_V1 +1] = {
149 {ADEID_NAME, ADEDOFF_NAME_V1, ADEDLEN_INIT}, /* 3 */
150 {ADEID_COMMENT, ADEDOFF_COMMENT_V1, ADEDLEN_INIT}, /* 4 */
151 {ADEID_FILEI, ADEDOFF_FILEI, ADEDLEN_FILEI}, /* 7 */
152 {ADEID_FINDERI, ADEDOFF_FINDERI_V1, ADEDLEN_FINDERI}, /* 9 */
153 {ADEID_RFORK, ADEDOFF_RFORK_V1, ADEDLEN_INIT}, /* 2 */
157 #if AD_VERSION == AD_VERSION1
158 #define DISK_EID(ad, a) (a)
160 #else /* AD_VERSION == AD_VERSION2 */
162 static u_int32_t get_eid(struct adouble *ad, u_int32_t eid)
166 if (ad->ad_version == AD_VERSION1)
169 return ADEID_PRIVDEV;
171 return ADEID_PRIVINO;
173 return ADEID_PRIVSYN;
180 #define DISK_EID(ad, a) get_eid(ad, a)
182 static const struct entry entry_order2[ADEID_NUM_V2 +1] = {
183 {ADEID_NAME, ADEDOFF_NAME_V2, ADEDLEN_INIT},
184 {ADEID_COMMENT, ADEDOFF_COMMENT_V2, ADEDLEN_INIT},
185 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI, ADEDLEN_FILEDATESI},
186 {ADEID_FINDERI, ADEDOFF_FINDERI_V2, ADEDLEN_FINDERI},
187 {ADEID_DID, ADEDOFF_DID, ADEDLEN_DID},
188 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI, ADEDLEN_AFPFILEI},
189 {ADEID_SHORTNAME, ADEDOFF_SHORTNAME, ADEDLEN_INIT},
190 {ADEID_PRODOSFILEI, ADEDOFF_PRODOSFILEI, ADEDLEN_PRODOSFILEI},
191 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV, ADEDLEN_INIT},
192 {ADEID_PRIVINO, ADEDOFF_PRIVINO, ADEDLEN_INIT},
193 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN, ADEDLEN_INIT},
194 {ADEID_PRIVID, ADEDOFF_PRIVID, ADEDLEN_INIT},
195 {ADEID_RFORK, ADEDOFF_RFORK_V2, ADEDLEN_INIT},
200 /* OS X adouble finder info and resource fork only
202 static const struct entry entry_order_osx[ADEID_NUM_OSX +1] = {
203 {ADEID_FINDERI, ADEDOFF_FINDERI_OSX, ADEDLEN_FINDERI},
204 {ADEID_RFORK, ADEDOFF_RFORK_OSX, ADEDLEN_INIT},
209 #endif /* AD_VERSION == AD_VERSION2 */
211 #if AD_VERSION == AD_VERSION2
213 static int ad_update(struct adouble *ad, const char *path)
216 u_int16_t nentries = 0;
217 off_t off, shiftdata=0;
218 const struct entry *eid;
219 static off_t entry_len[ADEID_MAX];
220 static char databuf[ADEID_MAX][256], *buf;
223 /* check to see if we should convert this header. */
224 if (!path || (ad->ad_flags != AD_VERSION2))
227 if (!(ad->ad_hf.adf_flags & ( O_RDWR | O_WRONLY))) {
228 /* we were unable to open the file read write the last time
233 if (ad->ad_eid[ADEID_RFORK].ade_off)
234 shiftdata = ADEDOFF_RFORK_V2 -ad->ad_eid[ADEID_RFORK].ade_off;
236 memcpy(&nentries, ad->ad_data + ADEDOFF_NENTRIES, sizeof( nentries ));
237 nentries = ntohs( nentries );
239 if ( shiftdata == 0 && nentries == ADEID_NUM_V2)
242 memset(entry_len, 0, sizeof(entry_len));
243 memset(databuf, 0, sizeof(databuf));
245 /* bail if we can't get a lock */
246 if (ad_tmplock(ad, ADEID_RFORK, ADLOCK_WR, 0, 0, 0) < 0)
249 if ((fd = open(path, O_RDWR)) < 0)
252 if (fstat(fd, &st) ||
253 sys_ftruncate(fd, st.st_size + shiftdata) < 0) {
256 if (st.st_size > 0x7fffffff) {
257 LOG(log_debug, logtype_default, "ad_update: file '%s' too big for update.", path);
260 /* last place for failure. */
261 if ((void *) (buf = (char *)
262 mmap(NULL, st.st_size + shiftdata,
263 PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
268 off = ad->ad_eid[ADEID_RFORK].ade_off;
270 /* move the RFORK. this assumes that the RFORK is at the end */
272 memmove(buf + ADEDOFF_RFORK_V2, buf + off, ad->ad_eid[ADEID_RFORK].ade_len);
275 munmap(buf, st.st_size + shiftdata);
278 /* now, fix up our copy of the header */
279 memset(ad->ad_filler, 0, sizeof(ad->ad_filler));
281 /* save the header entries */
284 if( ad->ad_eid[eid->id].ade_off != 0) {
285 if ( eid->id > 2 && ad->ad_eid[eid->id].ade_len < 256)
286 memcpy( databuf[eid->id], ad->ad_data +ad->ad_eid[eid->id].ade_off, ad->ad_eid[eid->id].ade_len);
287 entry_len[eid->id] = ad->ad_eid[eid->id].ade_len;
292 memset(ad->ad_data + AD_HEADER_LEN, 0, AD_DATASZ - AD_HEADER_LEN);
294 /* copy the saved entries to the new header */
297 if ( eid->id > 2 && entry_len[eid->id] > 0) {
298 memcpy(ad->ad_data+eid->offset, databuf[eid->id], entry_len[eid->id]);
300 ad->ad_eid[eid->id].ade_off = eid->offset;
301 ad->ad_eid[eid->id].ade_len = entry_len[eid->id];
305 /* rebuild the header and cleanup */
306 ad_flush(ad, ADFLAGS_HF );
307 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
309 LOG(log_debug, logtype_default, "updated AD2 header %s", path);
314 sys_ftruncate(fd, st.st_size);
318 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
324 /* FIXME work only if < 2GB */
325 static int ad_v1tov2(struct adouble *ad, const char *path)
331 /* use resource fork offset from file */
334 /* check to see if we should convert this header. */
335 if (!path || (ad->ad_version != AD_VERSION1))
338 /* we want version1 anyway */
339 if (ad->ad_flags != AD_VERSION2)
342 if (!(ad->ad_hf.adf_flags & ( O_RDWR | O_WRONLY))) {
343 /* we were unable to open the file read write the last time
349 /* we don't really know what we want */
350 ad->ad_flags = ad->ad_version;
354 /* convert from v1 to v2. what does this mean?
355 * 1) change FILEI into FILEDATESI
356 * 2) create space for SHORTNAME, AFPFILEI, DID, and PRODOSI
357 * 3) move FILEI attributes into AFPFILEI
358 * 4) initialize ACCESS field of FILEDATESI.
359 * 5) move the resource fork
362 /* bail if we can't get a lock */
363 if (ad_tmplock(ad, ADEID_RFORK, ADLOCK_WR, 0, 0, 0) < 0)
366 if ((fd = open(path, O_RDWR)) < 0)
369 if (ad->ad_eid[ADEID_RFORK].ade_off) {
370 shiftdata = ADEDOFF_RFORK_V2 -ad->ad_eid[ADEID_RFORK].ade_off;
373 shiftdata = ADEDOFF_RFORK_V2 -ADEDOFF_RFORK_V1; /* 136 */
376 if (fstat(fd, &st) ||
377 sys_ftruncate(fd, st.st_size + shiftdata) < 0) {
380 if (st.st_size > 0x7fffffff) {
381 LOG(log_debug, logtype_default, "ad_v1tov2: file too big.");
385 /* last place for failure. */
386 if ((void *) (buf = (char *)
387 mmap(NULL, st.st_size + shiftdata,
388 PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
393 off = ad->ad_eid[ADEID_RFORK].ade_off;
395 /* move the RFORK. this assumes that the RFORK is at the end */
397 memmove(buf + ADEDOFF_RFORK_V2, buf + off, ad->ad_eid[ADEID_RFORK].ade_len);
400 munmap(buf, st.st_size + shiftdata);
403 /* now, fix up our copy of the header */
404 memset(ad->ad_filler, 0, sizeof(ad->ad_filler));
406 /* replace FILEI with FILEDATESI */
407 ad_getattr(ad, &attr);
408 ad->ad_eid[ADEID_FILEDATESI].ade_off = ADEDOFF_FILEDATESI;
409 ad->ad_eid[ADEID_FILEDATESI].ade_len = ADEDLEN_FILEDATESI;
410 ad->ad_eid[ADEID_FILEI].ade_off = 0;
411 ad->ad_eid[ADEID_FILEI].ade_len = 0;
413 /* add in the new entries */
414 ad->ad_eid[ADEID_DID].ade_off = ADEDOFF_DID;
415 ad->ad_eid[ADEID_DID].ade_len = ADEDLEN_DID;
416 ad->ad_eid[ADEID_AFPFILEI].ade_off = ADEDOFF_AFPFILEI;
417 ad->ad_eid[ADEID_AFPFILEI].ade_len = ADEDLEN_AFPFILEI;
418 ad->ad_eid[ADEID_SHORTNAME].ade_off = ADEDOFF_SHORTNAME;
419 ad->ad_eid[ADEID_SHORTNAME].ade_len = ADEDLEN_INIT;
420 ad->ad_eid[ADEID_PRODOSFILEI].ade_off = ADEDOFF_PRODOSFILEI;
421 ad->ad_eid[ADEID_PRODOSFILEI].ade_len = ADEDLEN_PRODOSFILEI;
423 ad->ad_eid[ADEID_PRIVDEV].ade_off = ADEDOFF_PRIVDEV;
424 ad->ad_eid[ADEID_PRIVDEV].ade_len = ADEDLEN_INIT;
425 ad->ad_eid[ADEID_PRIVINO].ade_off = ADEDOFF_PRIVINO;
426 ad->ad_eid[ADEID_PRIVINO].ade_len = ADEDLEN_INIT;
427 ad->ad_eid[ADEID_PRIVSYN].ade_off = ADEDOFF_PRIVSYN;
428 ad->ad_eid[ADEID_PRIVSYN].ade_len = ADEDLEN_INIT;
429 ad->ad_eid[ADEID_PRIVID].ade_off = ADEDOFF_PRIVID;
430 ad->ad_eid[ADEID_PRIVID].ade_len = ADEDLEN_INIT;
432 /* shift the old entries (NAME, COMMENT, FINDERI, RFORK) */
433 ad->ad_eid[ADEID_NAME].ade_off = ADEDOFF_NAME_V2;
434 ad->ad_eid[ADEID_COMMENT].ade_off = ADEDOFF_COMMENT_V2;
435 ad->ad_eid[ADEID_FINDERI].ade_off = ADEDOFF_FINDERI_V2;
436 ad->ad_eid[ADEID_RFORK].ade_off = ADEDOFF_RFORK_V2;
439 ad->ad_version = AD_VERSION2;
441 /* move our data buffer to make space for the new entries. */
442 memmove(ad->ad_data + ADEDOFF_NAME_V2, ad->ad_data + ADEDOFF_NAME_V1,
443 ADEDOFF_RFORK_V1 - ADEDOFF_NAME_V1);
445 /* now, fill in the space with appropriate stuff. we're
446 operating as a v2 file now. */
447 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, st.st_mtime);
448 memset(ad_entry(ad, ADEID_DID), 0, ADEDLEN_DID);
449 memset(ad_entry(ad, ADEID_AFPFILEI), 0, ADEDLEN_AFPFILEI);
450 ad_setattr(ad, attr);
451 memset(ad_entry(ad, ADEID_SHORTNAME), 0, ADEDLEN_SHORTNAME);
452 memset(ad_entry(ad, ADEID_PRODOSFILEI), 0, ADEDLEN_PRODOSFILEI);
454 /* rebuild the header and cleanup */
455 ad_flush(ad, ADFLAGS_HF );
456 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
461 sys_ftruncate(fd, st.st_size);
465 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
469 #endif /* AD_VERSION == AD_VERSION2 */
472 mode_t ad_hf_mode (mode_t mode)
474 /* we always need RW mode for file owner */
478 /* fnctl lock need write access */
479 if ((mode & S_IRUSR))
481 if ((mode & S_IRGRP))
483 if ((mode & S_IROTH))
485 /* if write mode set add read mode */
486 if ((mode & S_IWUSR))
488 if ((mode & S_IWGRP))
490 if ((mode & S_IWOTH))
498 /* -------------------------------------
501 static void parse_entries(struct adouble *ad, char *buf,
504 u_int32_t eid, len, off;
507 /* now, read in the entry bits */
508 for (; nentries > 0; nentries-- ) {
509 memcpy(&eid, buf, sizeof( eid ));
510 eid = DISK_EID(ad, ntohl( eid ));
511 buf += sizeof( eid );
512 memcpy(&off, buf, sizeof( off ));
514 buf += sizeof( off );
515 memcpy(&len, buf, sizeof( len ));
517 buf += sizeof( len );
519 if ( 0 < eid && eid < ADEID_MAX ) {
520 ad->ad_eid[ eid ].ade_off = off;
521 ad->ad_eid[ eid ].ade_len = len;
522 } else if (!warning) {
524 LOG(log_debug, logtype_default, "ad_refresh: nentries %hd eid %d",
531 /* this reads enough of the header so that we can figure out all of
532 * the entry lengths and offsets. once that's done, we just read/mmap
533 * the rest of the header in.
535 * NOTE: we're assuming that the resource fork is kept at the end of
536 * the file. also, mmapping won't work for the hfs fs until it
537 * understands how to mmap header files. */
538 static int ad_header_read(struct adouble *ad, struct stat *hst)
540 char *buf = ad->ad_data;
544 static int warning = 0;
547 /* read the header */
548 if ((header_len = adf_pread( &ad->ad_hf, buf, sizeof(ad->ad_data), 0)) < 0) {
551 if (header_len < AD_HEADER_LEN) {
556 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
557 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
559 /* tag broken v1 headers. just assume they're all right.
560 * we detect two cases: null magic/version
561 * byte swapped magic/version
562 * XXX: in the future, you'll need the v1compat flag.
563 * (ad->ad_flags & ADFLAGS_V1COMPAT) */
564 if (!ad->ad_magic && !ad->ad_version) {
566 LOG(log_debug, logtype_default, "notice: fixing up null v1 magic/version.");
569 ad->ad_magic = AD_MAGIC;
570 ad->ad_version = AD_VERSION1;
572 } else if (ad->ad_magic == AD_MAGIC && ad->ad_version == AD_VERSION1) {
574 LOG(log_debug, logtype_default, "notice: fixing up byte-swapped v1 magic/version.");
579 ad->ad_magic = ntohl( ad->ad_magic );
580 ad->ad_version = ntohl( ad->ad_version );
583 if ((ad->ad_magic != AD_MAGIC) || ((ad->ad_version != AD_VERSION1)
584 #if AD_VERSION == AD_VERSION2
585 && (ad->ad_version != AD_VERSION2)
586 #endif /* AD_VERSION == AD_VERSION2 */
589 LOG(log_debug, logtype_default, "ad_open: can't parse AppleDouble header.");
593 memcpy(ad->ad_filler, buf + ADEDOFF_FILLER, sizeof( ad->ad_filler ));
594 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
595 nentries = ntohs( nentries );
597 /* read in all the entry headers. if we have more than the
598 * maximum, just hope that the rfork is specified early on. */
599 len = nentries*AD_ENTRY_LEN;
601 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
602 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
604 buf += AD_HEADER_LEN;
605 if (len > header_len - AD_HEADER_LEN) {
607 LOG(log_debug, logtype_default, "ad_header_read: can't read entry info.");
611 /* figure out all of the entry offsets and lengths. if we aren't
612 * able to read a resource fork entry, bail. */
613 nentries = len / AD_ENTRY_LEN;
614 parse_entries(ad, buf, nentries);
615 if (!ad_getentryoff(ad, ADEID_RFORK)
616 || (ad_getentryoff(ad, ADEID_RFORK) > sizeof(ad->ad_data))
619 LOG(log_debug, logtype_default, "ad_header_read: problem with rfork entry offset.");
623 if (ad_getentryoff(ad, ADEID_RFORK) > header_len) {
625 LOG(log_debug, logtype_default, "ad_header_read: can't read in entries.");
631 if (fstat(ad->ad_hf.adf_fd, &st) < 0) {
632 return 1; /* fail silently */
635 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
637 /* fix up broken dates */
638 if (ad->ad_version == AD_VERSION1) {
641 /* check to see if the ad date is wrong. just see if we have
642 * a modification date in the future. */
643 if (((ad_getdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, &aint)) == 0) &&
644 (aint > TIMEWARP_DELTA + hst->st_mtime)) {
645 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, aint - AD_DATE_DELTA);
646 ad_getdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, &aint);
647 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, aint - AD_DATE_DELTA);
648 ad_getdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, &aint);
649 ad_setdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, aint - AD_DATE_DELTA);
656 /* ---------------------------------------
657 * Put the .AppleDouble where it needs to be:
661 * \ b/.AppleDouble/.Parent
663 * FIXME: should do something for pathname > MAXPATHLEN
666 ad_path( path, adflags )
670 static char pathbuf[ MAXPATHLEN + 1];
671 char c, *slash, buf[MAXPATHLEN + 1];
674 l = strlcpy(buf, path, MAXPATHLEN +1);
675 if ( adflags & ADFLAGS_DIR ) {
676 strcpy( pathbuf, buf);
677 if ( *buf != '\0' && l < MAXPATHLEN) {
683 if (NULL != ( slash = strrchr( buf, '/' )) ) {
686 strcpy( pathbuf, buf);
693 strlcat( pathbuf, ".AppleDouble/", MAXPATHLEN +1);
694 strlcat( pathbuf, slash, MAXPATHLEN +1);
699 /* ---------------------------------------
700 * Put the resource fork where it needs to be:
704 ad_path_osx( path, adflags )
708 static char pathbuf[ MAXPATHLEN + 1];
709 char c, *slash, buf[MAXPATHLEN + 1];
711 if (!strcmp(path,".")) {
713 getcwd(buf, MAXPATHLEN);
716 strlcpy(buf, path, MAXPATHLEN +1);
718 if (NULL != ( slash = strrchr( buf, '/' )) ) {
721 strlcpy( pathbuf, buf, MAXPATHLEN +1);
727 strlcat( pathbuf, "._", MAXPATHLEN +1);
728 strlcat( pathbuf, slash, MAXPATHLEN +1);
733 * Support inherited protection modes for AppleDouble files. The supplied
734 * mode is ANDed with the parent directory's mask value in lieu of "umask",
735 * and that value is returned.
738 #define DEFMASK 07700 /* be conservative */
744 static char modebuf[ MAXPATHLEN + 1];
748 if ( (len = strlen( path )) >= MAXPATHLEN ) {
749 errno = ENAMETOOLONG;
750 return NULL; /* can't do it */
754 * For a path with directories in it, remove the final component
755 * (path or subdirectory name) to get the name we want to stat.
756 * For a path which is just a filename, use "." instead.
758 strcpy( modebuf, path );
759 slash = strrchr( modebuf, '/' );
760 /* is last char a '/' */
761 if (slash && slash[1] == 0) {
762 while (modebuf < slash && slash[-1] == '/') {
765 if (modebuf < slash) {
766 *slash = '\0'; /* remove pathname component */
767 slash = strrchr( modebuf, '/' );
771 *slash = '\0'; /* remove pathname component */
773 modebuf[0] = '.'; /* use current directory */
779 /* ---------------- */
780 static uid_t default_uid = -1;
782 int ad_setfuid(const uid_t id)
788 /* ---------------- */
789 uid_t ad_getfuid(void)
795 return inode of path parent directory
797 int ad_stat(const char *path, struct stat *stbuf)
806 return stat( p, stbuf );
810 if we are root change path user/ group
811 It can be a native function for BSD cf. FAQ.Q10
812 path: pathname to chown
813 stbuf: parent directory inode
815 use fstat and fchown or lchown with linux?
817 #define EMULATE_SUIDDIR
819 static int ad_chown(const char *path, struct stat *stbuf)
822 #ifdef EMULATE_SUIDDIR
825 if (default_uid != -1) {
826 /* we are root (admin) */
827 id = (default_uid)?default_uid:stbuf->st_uid;
828 ret = chown( path, id, stbuf->st_gid );
835 return access right and inode of path parent directory
837 static int ad_mode_st(const char *path, int *mode, struct stat *stbuf)
842 if (ad_stat(path, stbuf) != 0) {
846 *mode &= stbuf->st_mode;
851 return access right of path parent directory
854 ad_mode( path, mode )
859 ad_mode_st(path, &mode, &stbuf);
864 * Use mkdir() with mode bits taken from ad_mode().
867 ad_mkdir( path, mode )
876 LOG(log_info, logtype_default, "ad_mkdir: Creating directory with mode %d", mode);
879 st_invalid = ad_mode_st(path, &mode, &stbuf);
880 ret = mkdir( path, mode );
881 if (ret || st_invalid)
883 ad_chown(path, &stbuf);
888 /* ----------------- */
889 static int ad_error(struct adouble *ad, int adflags)
892 if ((adflags & ADFLAGS_NOHF)) {
893 /* FIXME double check : set header offset ?*/
896 if ((adflags & ADFLAGS_DF)) {
897 ad_close( ad, ADFLAGS_DF );
903 static int new_rfork(const char *path, struct adouble *ad, int adflags);
908 #define AD_SET(a) a = 0
911 void ad_init(struct adouble *ad, int flags)
913 memset( ad, 0, sizeof( struct adouble ) );
914 ad->ad_flags = flags;
915 if (flags == AD_VERSION2_OSX) {
916 ad->ad_path = ad_path_osx;
919 ad->ad_path = ad_path;
923 /* -------------------
924 * It's not possible to open the header file O_RDONLY -- the read
925 * will fail and return an error. this refcounts things now.
927 int ad_open( path, adflags, oflags, mode, ad )
929 int adflags, oflags, mode;
938 if (ad->ad_inited != AD_INITED) {
941 adf_lock_init(&ad->ad_df);
942 adf_lock_init(&ad->ad_hf);
943 ad->ad_inited = AD_INITED;
947 if ((adflags & ADFLAGS_DF)) {
948 if (ad_dfileno(ad) == -1) {
949 hoflags = (oflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
951 st_invalid = ad_mode_st(path, &admode, &st);
952 ad->ad_df.adf_fd =open( path, hoflags, admode );
953 if (ad->ad_df.adf_fd < 0 ) {
954 if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
956 ad->ad_df.adf_fd =open( path, hoflags, admode );
959 if ( ad->ad_df.adf_fd < 0)
962 AD_SET(ad->ad_df.adf_off);
963 ad->ad_df.adf_flags = hoflags;
964 if ((oflags & O_CREAT) && !st_invalid) {
965 /* just created, set owner if admin (root) */
970 /* the file is already open... but */
971 if ((oflags & ( O_RDWR | O_WRONLY)) && /* we want write access */
972 !(ad->ad_df.adf_flags & ( O_RDWR | O_WRONLY))) /* and it was denied the first time */
978 * for now ad_open is never called with O_TRUNC or O_EXCL if the file is
979 * already open. Should we check for it? ie
981 * O_TRUNC --> truncate the fork.
982 * idem for ressource fork.
985 open_df = ADFLAGS_DF;
986 ad->ad_df.adf_refcount++;
989 if (!(adflags & ADFLAGS_HF))
992 if (ad_hfileno(ad) != -1) { /* the file is already open */
993 if ((oflags & ( O_RDWR | O_WRONLY)) &&
994 !(ad->ad_hf.adf_flags & ( O_RDWR | O_WRONLY))) {
996 /* don't call with ADFLAGS_HF because we didn't open ressource fork */
997 ad_close( ad, open_df );
1003 ad->ad_hf.adf_refcount++;
1007 ad_p = ad->ad_path( path, adflags );
1009 hoflags = oflags & ~O_CREAT;
1010 if (!(adflags & ADFLAGS_RDONLY)) {
1011 hoflags = (hoflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
1013 ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 );
1014 if (ad->ad_hf.adf_fd < 0 ) {
1015 if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
1016 hoflags = oflags & ~O_CREAT;
1017 ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 );
1021 if ( ad->ad_hf.adf_fd < 0 ) {
1022 if (errno == ENOENT && (oflags & O_CREAT) ) {
1024 * We're expecting to create a new adouble header file,
1026 * if ((oflags & O_CREAT) ==> (oflags & O_RDWR)
1030 st_invalid = ad_mode_st(ad_p, &admode, &st);
1031 admode = ad_hf_mode(admode);
1032 if ( errno == ENOENT && !(adflags & ADFLAGS_NOADOUBLE) && ad->ad_flags != AD_VERSION2_OSX) {
1034 * Probably .AppleDouble doesn't exist, try to
1037 if (NULL == ( slash = strrchr( ad_p, '/' )) ) {
1038 return ad_error(ad, adflags);
1042 if ( ad_mkdir( ad_p, 0777 ) < 0 ) {
1043 return ad_error(ad, adflags);
1047 st_invalid = ad_mode_st(ad_p, &admode, &st);
1048 admode = ad_hf_mode(admode);
1050 /* retry with O_CREAT */
1051 ad->ad_hf.adf_fd = open( ad_p, oflags,admode );
1052 if ( ad->ad_hf.adf_fd < 0 ) {
1053 return ad_error(ad, adflags);
1055 ad->ad_hf.adf_flags = oflags;
1056 /* just created, set owner if admin owner (root) */
1058 ad_chown(ad_p, &st);
1062 return ad_error(ad, adflags);
1064 } else if (fstat(ad->ad_hf.adf_fd, &st) == 0 && st.st_size == 0) {
1065 /* for 0 length files, treat them as new. */
1066 ad->ad_hf.adf_flags = hoflags| O_TRUNC;
1068 ad->ad_hf.adf_flags = hoflags;
1070 AD_SET(ad->ad_hf.adf_off);
1072 memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
1073 ad->ad_hf.adf_refcount++;
1074 if ((ad->ad_hf.adf_flags & ( O_TRUNC | O_CREAT ))) {
1076 * This is a new adouble header file. Initialize the structure,
1077 * instead of reading it.
1079 if (new_rfork(path, ad, adflags) < 0) {
1081 /* the file is already deleted, perm, whatever, so return an error*/
1082 ad_close(ad, adflags);
1087 /* Read the adouble header in and parse it.*/
1088 if ((ad_header_read( ad , &st) < 0)
1089 #if AD_VERSION == AD_VERSION2
1090 || (ad_v1tov2(ad, ad_p) < 0) || (ad_update(ad, ad_p) < 0)
1091 #endif /* AD_VERSION == AD_VERSION2 */
1095 ad_close( ad, adflags );
1103 /* -----------------------------------
1104 * return only metadata but try very hard
1106 int ad_metadata(const char *name, int flags, struct adouble *adp)
1111 if ((ret = ad_open(name, ADFLAGS_HF | (flags), O_RDONLY, 0, adp)) < 0 && errno == EACCES) {
1114 LOG(log_error, logtype_default, "ad_metadata(%s): seteuid failed %s", name, strerror(errno));
1118 /* we are root open read only */
1119 ret = ad_open(name, ADFLAGS_HF|ADFLAGS_RDONLY|(flags), O_RDONLY, 0, adp);
1121 if ( seteuid(uid) < 0) {
1122 LOG(log_error, logtype_default, "ad_metadata: can't seteuid back");
1130 /* ----------------------------------- */
1131 static int new_rfork(const char *path, struct adouble *ad, int adflags)
1133 const struct entry *eid;
1137 ad->ad_magic = AD_MAGIC;
1138 ad->ad_version = ad->ad_flags & 0x0f0000;
1139 if (!ad->ad_version) {
1140 ad->ad_version = AD_VERSION;
1143 memset(ad->ad_filler, 0, sizeof( ad->ad_filler ));
1144 memset(ad->ad_data, 0, sizeof(ad->ad_data));
1146 #if AD_VERSION == AD_VERSION2
1147 if (ad->ad_flags == AD_VERSION2)
1149 else if (ad->ad_flags == AD_VERSION2_OSX)
1150 eid = entry_order_osx;
1156 ad->ad_eid[eid->id].ade_off = eid->offset;
1157 ad->ad_eid[eid->id].ade_len = eid->len;
1161 /* put something sane in the directory finderinfo */
1162 if ((adflags & ADFLAGS_DIR)) {
1163 /* set default view */
1164 ashort = htons(FINDERINFO_CLOSEDVIEW);
1165 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRVIEWOFF,
1166 &ashort, sizeof(ashort));
1168 /* set default creator/type fields */
1169 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRTYPEOFF,"TEXT", 4);
1170 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRCREATOFF,"UNIX", 4);
1173 /* make things invisible */
1174 if ((*path == '.') && strcmp(path, ".") && strcmp(path, "..")) {
1175 ashort = htons(ATTRBIT_INVISIBLE);
1176 ad_setattr(ad, ashort);
1177 ashort = htons(FINDERINFO_INVISIBLE);
1178 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRFLAGOFF,
1179 &ashort, sizeof(ashort));
1182 if (stat(path, &st) < 0) {
1186 /* put something sane in the date fields */
1187 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, st.st_mtime);
1188 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, st.st_mtime);
1189 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, st.st_mtime);
1190 ad_setdate(ad, AD_DATE_BACKUP, AD_DATE_START);
1194 /* to do this with mmap, we need the hfs fs to understand how to mmap
1196 int ad_refresh(struct adouble *ad)
1199 if (ad->ad_hf.adf_fd < 0)
1202 return ad_header_read(ad, NULL);