2 * $Id: ad_open.c,v 1.30.6.1 2003-09-09 16:42:21 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 */
37 #endif /* HAVE_FCNTL_H */
40 #endif /* HAVE_UNISTD_H */
42 #include <atalk/logger.h>
45 #include <sys/types.h>
47 #include <sys/param.h>
50 #include <netatalk/endian.h>
51 #include <atalk/adouble.h>
53 #include "ad_private.h"
56 #define MAX(a, b) ((a) < (b) ? (b) : (a))
60 * AppleDouble entry default offsets.
61 * The layout looks like this:
63 * this is the v1 layout:
65 * | NAME | COMMENT | FILEI | FINDERI | RFORK |
67 * we need to change it to look like this:
70 * field length (in bytes)
73 * FILEDATESI 16 replaces FILEI
77 * SHORTNAME 12 8.3 new
80 * so, all we need to do is replace FILEI with FILEDATESI, move RFORK,
81 * and add in the new fields.
83 * NOTE: the HFS module will need similar modifications to interact with
87 #define ADEDOFF_MAGIC (0)
88 #define ADEDOFF_VERSION (ADEDOFF_MAGIC + ADEDLEN_MAGIC)
89 #define ADEDOFF_FILLER (ADEDOFF_VERSION + ADEDLEN_VERSION)
90 #define ADEDOFF_NENTRIES (ADEDOFF_FILLER + ADEDLEN_FILLER)
92 /* initial lengths of some of the fields */
93 #define ADEDLEN_INIT 0
95 /* make sure we don't redefine ADEDOFF_FILEI */
98 #endif /* ADEDOFF_FILEI */
100 #define ADEDOFF_NAME_V1 (AD_HEADER_LEN + ADEID_NUM_V1*AD_ENTRY_LEN)
101 #define ADEDOFF_COMMENT_V1 (ADEDOFF_NAME_V1 + ADEDLEN_NAME)
102 #define ADEDOFF_FILEI (ADEDOFF_COMMENT_V1 + ADEDLEN_COMMENT)
103 #define ADEDOFF_FINDERI_V1 (ADEDOFF_FILEI + ADEDLEN_FILEI)
104 #define ADEDOFF_RFORK_V1 (ADEDOFF_FINDERI_V1 + ADEDLEN_FINDERI)
106 /* i stick things in a slightly different order than their eid order in
107 * case i ever want to separate RootInfo behaviour from the rest of the
109 #define ADEDOFF_NAME_V2 (AD_HEADER_LEN + ADEID_NUM_V2*AD_ENTRY_LEN)
110 #define ADEDOFF_COMMENT_V2 (ADEDOFF_NAME_V2 + ADEDLEN_NAME)
111 #define ADEDOFF_FILEDATESI (ADEDOFF_COMMENT_V2 + ADEDLEN_COMMENT)
112 #define ADEDOFF_FINDERI_V2 (ADEDOFF_FILEDATESI + ADEDLEN_FILEDATESI)
113 #define ADEDOFF_DID (ADEDOFF_FINDERI_V2 + ADEDLEN_FINDERI)
114 #define ADEDOFF_AFPFILEI (ADEDOFF_DID + ADEDLEN_DID)
115 #define ADEDOFF_SHORTNAME (ADEDOFF_AFPFILEI + ADEDLEN_AFPFILEI)
116 #define ADEDOFF_PRODOSFILEI (ADEDOFF_SHORTNAME + ADEDLEN_SHORTNAME)
117 #define ADEDOFF_PRIVDEV (ADEDOFF_PRODOSFILEI + ADEDLEN_PRODOSFILEI)
118 #define ADEDOFF_PRIVINO (ADEDOFF_PRIVDEV + ADEDLEN_PRIVDEV)
119 #define ADEDOFF_PRIVSYN (ADEDOFF_PRIVINO + ADEDLEN_PRIVINO)
121 #define ADEDOFF_RFORK_V2 (ADEDOFF_PRIVSYN + ADEDLEN_PRIVSYN)
123 /* we keep local copies of a bunch of stuff so that we can initialize things
126 /* Bits in the finderinfo data.
127 * see etc/afpd/{directory.c,file.c} for the finderinfo structure
129 #define FINDERINFO_CUSTOMICON 0x4
130 #define FINDERINFO_CLOSEDVIEW 0x100
132 /* offsets in finderinfo */
133 #define FINDERINFO_FRTYPEOFF 0
134 #define FINDERINFO_FRCREATOFF 4
135 #define FINDERINFO_FRFLAGOFF 8
136 #define FINDERINFO_FRVIEWOFF 14
138 /* invisible bit for dot files */
139 #define ATTRBIT_INVISIBLE (1 << 0)
140 #define FINDERINFO_INVISIBLE (1 << 14)
142 /* this is to prevent changing timezones from causing problems with
143 localtime volumes. the screw-up is 30 years. we use a delta of 5
145 #define TIMEWARP_DELTA 157680000
149 u_int32_t id, offset, len;
152 static const struct entry entry_order1[ADEID_NUM_V1 +1] = {
153 {ADEID_NAME, ADEDOFF_NAME_V1, ADEDLEN_INIT}, /* 3 */
154 {ADEID_COMMENT, ADEDOFF_COMMENT_V1, ADEDLEN_INIT}, /* 4 */
155 {ADEID_FILEI, ADEDOFF_FILEI, ADEDLEN_FILEI}, /* 7 */
156 {ADEID_FINDERI, ADEDOFF_FINDERI_V1, ADEDLEN_FINDERI}, /* 9 */
157 {ADEID_RFORK, ADEDOFF_RFORK_V1, ADEDLEN_INIT}, /* 2 */
161 #if AD_VERSION == AD_VERSION1
162 #define DISK_EID(ad, a) (a)
164 #else /* AD_VERSION == AD_VERSION2 */
166 static u_int32_t get_eid(struct adouble *ad, u_int32_t eid)
170 if (ad->ad_version == AD_VERSION1)
173 return ADEID_PRIVDEV;
175 return ADEID_PRIVINO;
177 return ADEID_PRIVSYN;
182 #define DISK_EID(ad, a) get_eid(ad, a)
184 static const struct entry entry_order2[ADEID_NUM_V2 +1] = {
185 {ADEID_NAME, ADEDOFF_NAME_V2, ADEDLEN_INIT},
186 {ADEID_COMMENT, ADEDOFF_COMMENT_V2, ADEDLEN_INIT},
187 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI, ADEDLEN_FILEDATESI},
188 {ADEID_FINDERI, ADEDOFF_FINDERI_V2, ADEDLEN_FINDERI},
189 {ADEID_DID, ADEDOFF_DID, ADEDLEN_DID},
190 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI, ADEDLEN_AFPFILEI},
191 {ADEID_SHORTNAME, ADEDOFF_SHORTNAME, ADEDLEN_INIT},
192 {ADEID_PRODOSFILEI, ADEDOFF_PRODOSFILEI, ADEDLEN_PRODOSFILEI},
193 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV, ADEDLEN_INIT},
194 {ADEID_PRIVINO, ADEDOFF_PRIVINO, ADEDLEN_INIT},
195 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN, ADEDLEN_INIT},
196 {ADEID_RFORK, ADEDOFF_RFORK_V2, ADEDLEN_INIT},
200 #endif /* AD_VERSION == AD_VERSION2 */
202 #if AD_VERSION == AD_VERSION2
204 /* FIXME work only if < 2GB */
205 static int ad_v1tov2(struct adouble *ad, const char *path)
212 /* check to see if we should convert this header. */
213 if (!path || (ad->ad_version != AD_VERSION1))
216 /* we want version1 anyway */
217 if (ad->ad_flags == AD_VERSION1)
222 /* we don't really know what we want */
223 ad->ad_flags = ad->ad_version;
227 /* convert from v1 to v2. what does this mean?
228 * 1) change FILEI into FILEDATESI
229 * 2) create space for SHORTNAME, AFPFILEI, DID, and PRODOSI
230 * 3) move FILEI attributes into AFPFILEI
231 * 4) initialize ACCESS field of FILEDATESI.
233 * so, we need 4*12 (entry ids) + 12 (shortname) + 4 (afpfilei) +
234 * 4 (did) + 8 (prodosi) = 76 more bytes. */
236 #define SHIFTDATA (AD_DATASZ2 - AD_DATASZ1)
238 /* bail if we can't get a lock */
239 if (ad_tmplock(ad, ADEID_RFORK, ADLOCK_WR, 0, 0, 0) < 0)
242 if ((fd = open(path, O_RDWR)) < 0)
245 if (fstat(fd, &st) ||
246 ftruncate(fd, st.st_size + SHIFTDATA) < 0) {
249 if (st.st_size > 0x7fffffff) {
250 LOG(log_debug, logtype_default, "ad_v1tov2: file too big.");
254 /* last place for failure. */
255 if ((void *) (buf = (char *)
256 mmap(NULL, st.st_size + SHIFTDATA,
257 PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
262 off = ad->ad_eid[ADEID_RFORK].ade_off;
264 /* move the RFORK. this assumes that the RFORK is at the end */
265 memmove(buf + off + SHIFTDATA, buf + off,
266 ad->ad_eid[ADEID_RFORK].ade_len);
268 munmap(buf, st.st_size + SHIFTDATA);
271 /* now, fix up our copy of the header */
272 memset(ad->ad_filler, 0, sizeof(ad->ad_filler));
274 /* replace FILEI with FILEDATESI */
275 ad_getattr(ad, &attr);
276 ad->ad_eid[ADEID_FILEDATESI].ade_off = ADEDOFF_FILEDATESI;
277 ad->ad_eid[ADEID_FILEDATESI].ade_len = ADEDLEN_FILEDATESI;
278 ad->ad_eid[ADEID_FILEI].ade_off = 0;
279 ad->ad_eid[ADEID_FILEI].ade_len = 0;
281 /* add in the new entries */
282 ad->ad_eid[ADEID_DID].ade_off = ADEDOFF_DID;
283 ad->ad_eid[ADEID_DID].ade_len = ADEDLEN_DID;
284 ad->ad_eid[ADEID_AFPFILEI].ade_off = ADEDOFF_AFPFILEI;
285 ad->ad_eid[ADEID_AFPFILEI].ade_len = ADEDLEN_AFPFILEI;
286 ad->ad_eid[ADEID_SHORTNAME].ade_off = ADEDOFF_SHORTNAME;
287 ad->ad_eid[ADEID_SHORTNAME].ade_len = ADEDLEN_INIT;
288 ad->ad_eid[ADEID_PRODOSFILEI].ade_off = ADEDOFF_PRODOSFILEI;
289 ad->ad_eid[ADEID_PRODOSFILEI].ade_len = ADEDLEN_PRODOSFILEI;
291 ad->ad_eid[ADEID_PRIVDEV].ade_off = ADEDOFF_PRIVDEV;
292 ad->ad_eid[ADEID_PRIVDEV].ade_len = ADEDLEN_INIT;
293 ad->ad_eid[ADEID_PRIVINO].ade_off = ADEDOFF_PRIVINO;
294 ad->ad_eid[ADEID_PRIVINO].ade_len = ADEDLEN_INIT;
295 ad->ad_eid[ADEID_PRIVSYN].ade_off = ADEDOFF_PRIVSYN;
296 ad->ad_eid[ADEID_PRIVSYN].ade_len = ADEDLEN_INIT;
298 /* shift the old entries (NAME, COMMENT, FINDERI, RFORK) */
299 ad->ad_eid[ADEID_NAME].ade_off = ADEDOFF_NAME_V2;
300 ad->ad_eid[ADEID_COMMENT].ade_off = ADEDOFF_COMMENT_V2;
301 ad->ad_eid[ADEID_FINDERI].ade_off = ADEDOFF_FINDERI_V2;
302 ad->ad_eid[ADEID_RFORK].ade_off = ADEDOFF_RFORK_V2;
305 ad->ad_version = AD_VERSION2;
307 /* move our data buffer to make space for the new entries. */
308 memmove(ad->ad_data + ADEDOFF_NAME_V2, ad->ad_data + ADEDOFF_NAME_V1,
309 ADEDOFF_RFORK_V1 - ADEDOFF_NAME_V1);
311 /* now, fill in the space with appropriate stuff. we're
312 operating as a v2 file now. */
313 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, st.st_mtime);
314 memset(ad_entry(ad, ADEID_DID), 0, ADEDLEN_DID);
315 memset(ad_entry(ad, ADEID_AFPFILEI), 0, ADEDLEN_AFPFILEI);
316 ad_setattr(ad, attr);
317 memset(ad_entry(ad, ADEID_SHORTNAME), 0, ADEDLEN_SHORTNAME);
318 memset(ad_entry(ad, ADEID_PRODOSFILEI), 0, ADEDLEN_PRODOSFILEI);
320 /* rebuild the header and cleanup */
321 ad_flush(ad, ADFLAGS_HF );
322 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
327 ftruncate(fd, st.st_size);
331 ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0, 0);
335 #endif /* AD_VERSION == AD_VERSION2 */
338 mode_t ad_hf_mode (mode_t mode)
340 /* fnctl lock need write access */
341 if ((mode & S_IRUSR))
343 if ((mode & S_IRGRP))
345 if ((mode & S_IROTH))
347 /* if write mode set add read mode */
348 if ((mode & S_IWUSR))
350 if ((mode & S_IWGRP))
352 if ((mode & S_IWOTH))
360 /* -------------------------------------
363 static void parse_entries(struct adouble *ad, char *buf,
366 u_int32_t eid, len, off;
369 /* now, read in the entry bits */
370 for (; nentries > 0; nentries-- ) {
371 memcpy(&eid, buf, sizeof( eid ));
372 eid = DISK_EID(ad, ntohl( eid ));
373 buf += sizeof( eid );
374 memcpy(&off, buf, sizeof( off ));
376 buf += sizeof( off );
377 memcpy(&len, buf, sizeof( len ));
379 buf += sizeof( len );
381 if ( 0 < eid && eid < ADEID_MAX ) {
382 ad->ad_eid[ eid ].ade_off = off;
383 ad->ad_eid[ eid ].ade_len = len;
384 } else if (!warning) {
386 LOG(log_debug, logtype_default, "ad_refresh: nentries %hd eid %d\n",
393 /* this reads enough of the header so that we can figure out all of
394 * the entry lengths and offsets. once that's done, we just read/mmap
395 * the rest of the header in.
397 * NOTE: we're assuming that the resource fork is kept at the end of
398 * the file. also, mmapping won't work for the hfs fs until it
399 * understands how to mmap header files. */
400 static int ad_header_read(struct adouble *ad, struct stat *hst)
402 char *buf = ad->ad_data;
406 static int warning = 0;
409 /* read the header */
410 if ((header_len = adf_pread( &ad->ad_hf, buf, sizeof(ad->ad_data), 0)) < 0) {
413 if (header_len < AD_HEADER_LEN) {
418 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
419 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
421 /* tag broken v1 headers. just assume they're all right.
422 * we detect two cases: null magic/version
423 * byte swapped magic/version
424 * XXX: in the future, you'll need the v1compat flag.
425 * (ad->ad_flags & ADFLAGS_V1COMPAT) */
426 if (!ad->ad_magic && !ad->ad_version) {
428 LOG(log_debug, logtype_default, "notice: fixing up null v1 magic/version.");
431 ad->ad_magic = AD_MAGIC;
432 ad->ad_version = AD_VERSION1;
434 } else if (ad->ad_magic == AD_MAGIC && ad->ad_version == AD_VERSION1) {
436 LOG(log_debug, logtype_default, "notice: fixing up byte-swapped v1 magic/version.");
441 ad->ad_magic = ntohl( ad->ad_magic );
442 ad->ad_version = ntohl( ad->ad_version );
445 if ((ad->ad_magic != AD_MAGIC) || ((ad->ad_version != AD_VERSION1)
446 #if AD_VERSION == AD_VERSION2
447 && (ad->ad_version != AD_VERSION2)
448 #endif /* AD_VERSION == AD_VERSION2 */
451 LOG(log_debug, logtype_default, "ad_open: can't parse AppleDouble header.");
455 memcpy(ad->ad_filler, buf + ADEDOFF_FILLER, sizeof( ad->ad_filler ));
456 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
457 nentries = ntohs( nentries );
459 /* read in all the entry headers. if we have more than the
460 * maximum, just hope that the rfork is specified early on. */
461 len = nentries*AD_ENTRY_LEN;
463 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
464 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
466 buf += AD_HEADER_LEN;
467 if (len > header_len - AD_HEADER_LEN) {
469 LOG(log_debug, logtype_default, "ad_header_read: can't read entry info.");
473 /* figure out all of the entry offsets and lengths. if we aren't
474 * able to read a resource fork entry, bail. */
475 nentries = len / AD_ENTRY_LEN;
476 parse_entries(ad, buf, nentries);
477 if (!ad_getentryoff(ad, ADEID_RFORK)
478 || (ad_getentryoff(ad, ADEID_RFORK) > sizeof(ad->ad_data))
480 LOG(log_debug, logtype_default, "ad_header_read: problem with rfork entry offset.");
484 if (ad_getentryoff(ad, ADEID_RFORK) > header_len) {
486 LOG(log_debug, logtype_default, "ad_header_read: can't read in entries.");
492 if (fstat(ad->ad_hf.adf_fd, &st) < 0) {
493 return 1; /* fail silently */
496 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
498 /* fix up broken dates */
499 if (ad->ad_version == AD_VERSION1) {
502 /* check to see if the ad date is wrong. just see if we have
503 * a modification date in the future. */
504 if (((ad_getdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, &aint)) == 0) &&
505 (aint > TIMEWARP_DELTA + hst->st_mtime)) {
506 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, aint - AD_DATE_DELTA);
507 ad_getdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, &aint);
508 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, aint - AD_DATE_DELTA);
509 ad_getdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, &aint);
510 ad_setdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, aint - AD_DATE_DELTA);
519 * Put the .AppleDouble where it needs to be:
523 * \ b/.AppleDouble/.Parent
526 ad_path( path, adflags )
530 static char pathbuf[ MAXPATHLEN + 1];
531 char c, *slash, buf[MAXPATHLEN + 1];
533 strncpy(buf, path, MAXPATHLEN);
534 if ( adflags & ADFLAGS_DIR ) {
535 strncpy( pathbuf, buf, MAXPATHLEN );
536 if ( *buf != '\0' ) {
537 strcat( pathbuf, "/" );
541 if (NULL != ( slash = strrchr( buf, '/' )) ) {
544 strncpy( pathbuf, buf, MAXPATHLEN);
551 strncat( pathbuf, ".AppleDouble/", MAXPATHLEN - strlen(pathbuf));
552 strncat( pathbuf, slash, MAXPATHLEN - strlen(pathbuf));
558 * Support inherited protection modes for AppleDouble files. The supplied
559 * mode is ANDed with the parent directory's mask value in lieu of "umask",
560 * and that value is returned.
563 #define DEFMASK 07700 /* be conservative */
569 static char modebuf[ MAXPATHLEN + 1];
573 if ( (len = strlen( path )) >= MAXPATHLEN ) {
574 errno = ENAMETOOLONG;
575 return NULL; /* can't do it */
579 * For a path with directories in it, remove the final component
580 * (path or subdirectory name) to get the name we want to stat.
581 * For a path which is just a filename, use "." instead.
583 strcpy( modebuf, path );
584 slash = strrchr( modebuf, '/' );
585 /* is last char a '/' */
586 if (slash && slash[1] == 0) {
587 while (modebuf < slash && slash[-1] == '/') {
590 if (modebuf < slash) {
591 *slash = '\0'; /* remove pathname component */
592 slash = strrchr( modebuf, '/' );
596 *slash = '\0'; /* remove pathname component */
598 modebuf[0] = '.'; /* use current directory */
604 /* ---------------- */
605 static uid_t default_uid = -1;
607 int ad_setfuid(const uid_t id)
613 /* ---------------- */
614 uid_t ad_getfuid(void)
620 return inode of path parent directory
622 int ad_stat(const char *path, struct stat *stbuf)
631 return stat( p, stbuf );
635 if we are root change path user/ group
636 It can be a native function for BSD cf. FAQ.Q10
637 path: pathname to chown
638 stbuf: parent directory inode
640 use fstat and fchown or lchown with linux?
642 #define EMULATE_SUIDDIR
644 static int ad_chown(const char *path, struct stat *stbuf)
647 #ifdef EMULATE_SUIDDIR
650 if (default_uid != -1) {
651 /* we are root (admin) */
652 id = (default_uid)?default_uid:stbuf->st_uid;
653 ret = chown( path, id, stbuf->st_gid );
660 return access right and inode of path parent directory
662 static int ad_mode_st(const char *path, int *mode, struct stat *stbuf)
667 if (ad_stat(path, stbuf) != 0) {
671 *mode &= stbuf->st_mode;
676 return access right of path parent directory
679 ad_mode( path, mode )
684 ad_mode_st(path, &mode, &stbuf);
689 * Use mkdir() with mode bits taken from ad_mode().
692 ad_mkdir( path, mode )
701 LOG(log_info, logtype_default, "ad_mkdir: Creating directory with mode %d", mode);
704 st_invalid = ad_mode_st(path, &mode, &stbuf);
705 ret = mkdir( path, mode );
706 if (ret || st_invalid)
708 ad_chown(path, &stbuf);
713 /* ----------------- */
714 static int ad_error(struct adouble *ad, int adflags)
716 if ((adflags & ADFLAGS_NOHF)) {
717 /* FIXME double check : set header offset ?*/
720 if ((adflags & ADFLAGS_DF)) {
721 ad_close( ad, ADFLAGS_DF );
726 static int new_rfork(const char *path, struct adouble *ad, int adflags);
731 #define AD_SET(a) a = 0
734 void ad_init(struct adouble *ad, int flags)
736 memset( ad, 0, sizeof( struct adouble ) );
737 ad->ad_flags = flags;
740 /* -------------------
741 * It's not possible to open the header file O_RDONLY -- the read
742 * will fail and return an error. this refcounts things now.
744 int ad_open( path, adflags, oflags, mode, ad )
746 int adflags, oflags, mode;
755 if (ad->ad_inited != AD_INITED) {
758 adf_lock_init(&ad->ad_df);
759 adf_lock_init(&ad->ad_hf);
760 ad->ad_inited = AD_INITED;
764 if ((adflags & ADFLAGS_DF)) {
765 if (ad_dfileno(ad) == -1) {
766 hoflags = (oflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
768 st_invalid = ad_mode_st(path, &admode, &st);
769 ad->ad_df.adf_fd =open( path, hoflags, admode );
770 if (ad->ad_df.adf_fd < 0 ) {
771 if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
773 ad->ad_df.adf_fd =open( path, hoflags, admode );
776 if ( ad->ad_df.adf_fd < 0)
779 AD_SET(ad->ad_df.adf_off);
780 ad->ad_df.adf_flags = hoflags;
781 if ((oflags & O_CREAT) && !st_invalid) {
782 /* just created, set owner if admin (root) */
787 /* the file is already open... but */
788 if ((oflags & ( O_RDWR | O_WRONLY)) && /* we want write access */
789 !(ad->ad_df.adf_flags & ( O_RDWR | O_WRONLY))) /* and it was denied the first time */
795 * for now ad_open is never called with O_TRUNC or O_EXCL if the file is
796 * already open. Should we check for it? ie
798 * O_TRUNC --> truncate the fork.
799 * idem for ressource fork.
802 open_df = ADFLAGS_DF;
803 ad->ad_df.adf_refcount++;
806 if (!(adflags & ADFLAGS_HF))
809 if (ad_hfileno(ad) != -1) { /* the file is already open */
810 if ((oflags & ( O_RDWR | O_WRONLY)) &&
811 !(ad->ad_hf.adf_flags & ( O_RDWR | O_WRONLY))) {
813 /* don't call with ADFLAGS_HF because we didn't open ressource fork */
814 ad_close( ad, open_df );
820 ad->ad_hf.adf_refcount++;
824 ad_p = ad_path( path, adflags );
826 hoflags = oflags & ~O_CREAT;
827 hoflags = (hoflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
828 ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 );
829 if (ad->ad_hf.adf_fd < 0 ) {
830 if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
831 hoflags = oflags & ~O_CREAT;
832 ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 );
836 if ( ad->ad_hf.adf_fd < 0 ) {
837 if (errno == ENOENT && (oflags & O_CREAT) ) {
839 * We're expecting to create a new adouble header file,
841 * if ((oflags & O_CREAT) ==> (oflags & O_RDWR)
844 st_invalid = ad_mode_st(ad_p, &admode, &st);
845 admode = ad_hf_mode(admode);
847 ad->ad_hf.adf_fd = open( ad_p, oflags,admode );
848 if ( ad->ad_hf.adf_fd < 0 ) {
850 * Probably .AppleDouble doesn't exist, try to
853 if (errno == ENOENT && (adflags & ADFLAGS_NOADOUBLE) == 0) {
854 if (NULL == ( slash = strrchr( ad_p, '/' )) ) {
855 return ad_error(ad, adflags);
859 if ( ad_mkdir( ad_p, 0777 ) < 0 ) {
860 return ad_error(ad, adflags);
864 st_invalid = ad_mode_st(ad_p, &admode, &st);
865 admode = ad_hf_mode(admode);
866 ad->ad_hf.adf_fd = open( ad_p, oflags, admode);
867 if ( ad->ad_hf.adf_fd < 0 ) {
868 return ad_error(ad, adflags);
871 return ad_error(ad, adflags);
874 ad->ad_hf.adf_flags = oflags;
875 /* just created, set owner if admin owner (root) */
881 return ad_error(ad, adflags);
883 } else if (fstat(ad->ad_hf.adf_fd, &st) == 0 && st.st_size == 0) {
884 /* for 0 length files, treat them as new. */
885 ad->ad_hf.adf_flags = (oflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR | O_TRUNC;
887 ad->ad_hf.adf_flags = hoflags;
889 AD_SET(ad->ad_hf.adf_off);
891 memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
892 ad->ad_hf.adf_refcount++;
893 if ((ad->ad_hf.adf_flags & ( O_TRUNC | O_CREAT ))) {
895 * This is a new adouble header file. Initialize the structure,
896 * instead of reading it.
898 if (new_rfork(path, ad, adflags) < 0) {
899 /* the file is already deleted, perm, whatever, so return an error*/
900 ad_close(ad, adflags);
904 /* Read the adouble header in and parse it.*/
905 if ((ad_header_read( ad , &st) < 0)
906 #if AD_VERSION == AD_VERSION2
907 || (ad_v1tov2(ad, ad_p) < 0)
908 #endif /* AD_VERSION == AD_VERSION2 */
910 ad_close( ad, adflags );
917 /* ----------------------------------- */
918 static int new_rfork(const char *path, struct adouble *ad, int adflags)
923 const struct entry *eid;
927 ad->ad_magic = AD_MAGIC;
928 ad->ad_version = ad->ad_flags;
930 ad->ad_version = AD_VERSION;
932 memset(ad->ad_filler, 0, sizeof( ad->ad_filler ));
933 memset(ad->ad_data, 0, sizeof(ad->ad_data));
935 #if AD_VERSION == AD_VERSION2
936 if (ad->ad_version == AD_VERSION2)
943 ad->ad_eid[eid->id].ade_off = eid->offset;
944 ad->ad_eid[eid->id].ade_len = eid->len;
948 /* put something sane in the directory finderinfo */
949 if ((adflags & ADFLAGS_DIR)) {
950 /* set default view */
951 ashort = htons(FINDERINFO_CLOSEDVIEW);
952 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRVIEWOFF,
953 &ashort, sizeof(ashort));
955 /* set default creator/type fields */
956 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRTYPEOFF,"TEXT", 4);
957 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRCREATOFF,"UNIX", 4);
960 /* make things invisible */
961 if ((*path == '.') && strcmp(path, ".") && strcmp(path, "..")) {
962 ashort = htons(ATTRBIT_INVISIBLE);
963 ad_setattr(ad, ashort);
964 ashort = htons(FINDERINFO_INVISIBLE);
965 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRFLAGOFF,
966 &ashort, sizeof(ashort));
970 if (gettimeofday(&tv, NULL) < 0) {
975 if (stat(path, &st) < 0) {
979 /* put something sane in the date fields */
980 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, st.st_mtime);
981 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, st.st_mtime);
982 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, st.st_mtime);
983 ad_setdate(ad, AD_DATE_BACKUP, AD_DATE_START);
987 /* to do this with mmap, we need the hfs fs to understand how to mmap
989 int ad_refresh(struct adouble *ad)
992 if (ad->ad_hf.adf_fd < -1)
995 return ad_header_read(ad, NULL);