2
* $Id: ad_open.c,v 1.19.2.1 2003/04/10 23:34:57 didg Exp $
4
* Copyright (c) 1999 Adrian Sun (asun@u.washington.edu)
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* Copyright (c) 1990,1991 Regents of The University of Michigan.
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies and
11
* that both that copyright notice and this permission notice appear
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* 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
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* implied warranties of any kind.
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* Research Systems Unix Group
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* The University of Michigan
21
* 535 W. William Street
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* netatalk@itd.umich.edu
29
#endif /* HAVE_CONFIG_H */
34
#endif /* HAVE_FCNTL_H */
37
#endif /* HAVE_UNISTD_H */
39
#include <atalk/logger.h>
42
#include <sys/types.h>
44
#include <sys/param.h>
47
#include <netatalk/endian.h>
48
#include <atalk/adouble.h>
50
#include "ad_private.h"
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#define MAX(a, b) ((a) < (b) ? (b) : (a))
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* AppleDouble entry default offsets.
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* The layout looks like this:
60
* this is the v1 layout:
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* | NAME | COMMENT | FILEI | FINDERI | RFORK |
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* we need to change it to look like this:
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* field length (in bytes)
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* FILEDATESI 16 replaces FILEI
74
* SHORTNAME 12 8.3 new
77
* so, all we need to do is replace FILEI with FILEDATESI, move RFORK,
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* and add in the new fields.
80
* NOTE: the HFS module will need similar modifications to interact with
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#define ADEDOFF_MAGIC (0)
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#define ADEDOFF_VERSION (ADEDOFF_MAGIC + ADEDLEN_MAGIC)
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#define ADEDOFF_FILLER (ADEDOFF_VERSION + ADEDLEN_VERSION)
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#define ADEDOFF_NENTRIES (ADEDOFF_FILLER + ADEDLEN_FILLER)
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/* initial lengths of some of the fields */
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#define ADEDLEN_INIT 0
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/* make sure we don't redefine ADEDOFF_FILEI */
95
#endif /* ADEDOFF_FILEI */
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#define ADEID_NUM_V1 5
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#define ADEDOFF_NAME_V1 (AD_HEADER_LEN + ADEID_NUM_V1*AD_ENTRY_LEN)
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#define ADEDOFF_COMMENT_V1 (ADEDOFF_NAME_V1 + ADEDLEN_NAME)
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#define ADEDOFF_FILEI (ADEDOFF_COMMENT_V1 + ADEDLEN_COMMENT)
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#define ADEDOFF_FINDERI_V1 (ADEDOFF_FILEI + ADEDLEN_FILEI)
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#define ADEDOFF_RFORK_V1 (ADEDOFF_FINDERI_V1 + ADEDLEN_FINDERI)
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/* i stick things in a slightly different order than their eid order in
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* case i ever want to separate RootInfo behaviour from the rest of the
107
#define ADEID_NUM_V2 9
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#define ADEDOFF_NAME_V2 (AD_HEADER_LEN + ADEID_NUM_V2*AD_ENTRY_LEN)
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#define ADEDOFF_COMMENT_V2 (ADEDOFF_NAME_V2 + ADEDLEN_NAME)
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#define ADEDOFF_FILEDATESI (ADEDOFF_COMMENT_V2 + ADEDLEN_COMMENT)
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#define ADEDOFF_FINDERI_V2 (ADEDOFF_FILEDATESI + ADEDLEN_FILEDATESI)
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#define ADEDOFF_DID (ADEDOFF_FINDERI_V2 + ADEDLEN_FINDERI)
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#define ADEDOFF_AFPFILEI (ADEDOFF_DID + ADEDLEN_DID)
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#define ADEDOFF_SHORTNAME (ADEDOFF_AFPFILEI + ADEDLEN_AFPFILEI)
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#define ADEDOFF_PRODOSFILEI (ADEDOFF_SHORTNAME + ADEDLEN_SHORTNAME)
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#define ADEDOFF_RFORK_V2 (ADEDOFF_PRODOSFILEI + ADEDLEN_PRODOSFILEI)
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/* we keep local copies of a bunch of stuff so that we can initialize things
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/* Bits in the finderinfo data.
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* see etc/afpd/{directory.c,file.c} for the finderinfo structure
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#define FINDERINFO_CUSTOMICON 0x4
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#define FINDERINFO_CLOSEDVIEW 0x100
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/* offsets in finderinfo */
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#define FINDERINFO_FRTYPEOFF 0
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#define FINDERINFO_FRCREATOFF 4
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#define FINDERINFO_FRFLAGOFF 8
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#define FINDERINFO_FRVIEWOFF 14
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/* invisible bit for dot files */
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#define ATTRBIT_INVISIBLE (1 << 0)
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#define FINDERINFO_INVISIBLE (1 << 14)
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/* this is to prevent changing timezones from causing problems with
140
localtime volumes. the screw-up is 30 years. we use a delta of 5
142
#define TIMEWARP_DELTA 157680000
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u_int32_t id, offset, len;
149
#if AD_VERSION == AD_VERSION1
150
static const struct entry entry_order[] = {
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{ADEID_NAME, ADEDOFF_NAME_V1, ADEDLEN_INIT},
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{ADEID_COMMENT, ADEDOFF_COMMENT_V1, ADEDLEN_INIT},
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{ADEID_FILEI, ADEDOFF_FILEI, ADEDLEN_FILEI},
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{ADEID_FINDERI, ADEDOFF_FINDERI_V1, ADEDLEN_FINDERI},
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{ADEID_RFORK, ADEDOFF_RFORK_V1, ADEDLEN_INIT},
158
#else /* AD_VERSION == AD_VERSION2 */
159
static const struct entry entry_order[] = {
160
{ADEID_NAME, ADEDOFF_NAME_V2, ADEDLEN_INIT},
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{ADEID_COMMENT, ADEDOFF_COMMENT_V2, ADEDLEN_INIT},
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{ADEID_FILEDATESI, ADEDOFF_FILEDATESI, ADEDLEN_FILEDATESI},
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{ADEID_FINDERI, ADEDOFF_FINDERI_V2, ADEDLEN_FINDERI},
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{ADEID_DID, ADEDOFF_DID, ADEDLEN_DID},
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{ADEID_AFPFILEI, ADEDOFF_AFPFILEI, ADEDLEN_AFPFILEI},
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{ADEID_SHORTNAME, ADEDOFF_SHORTNAME, ADEDLEN_INIT},
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{ADEID_PRODOSFILEI, ADEDOFF_PRODOSFILEI, ADEDLEN_PRODOSFILEI},
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{ADEID_RFORK, ADEDOFF_RFORK_V2, ADEDLEN_INIT},
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#endif /* AD_VERSION == AD_VERSION2 */
173
#if AD_VERSION == AD_VERSION2
176
static __inline__ int ad_v1tov2(struct adouble *ad, const char *path)
184
/* check to see if we should convert this header. */
185
if (!path || (ad->ad_version != AD_VERSION1))
188
/* convert from v1 to v2. what does this mean?
189
* 1) change FILEI into FILEDATESI
190
* 2) create space for SHORTNAME, AFPFILEI, DID, and PRODOSI
191
* 3) move FILEI attributes into AFPFILEI
192
* 4) initialize ACCESS field of FILEDATESI.
194
* so, we need 4*12 (entry ids) + 12 (shortname) + 4 (afpfilei) +
195
* 4 (did) + 8 (prodosi) = 76 more bytes. */
197
#define SHIFTDATA (AD_DATASZ2 - AD_DATASZ1)
199
/* bail if we can't get a lock */
200
if (ad_tmplock(ad, ADEID_RFORK, ADLOCK_WR, 0, 0) < 0)
203
if ((fd = open(path, O_RDWR)) < 0)
206
if (gettimeofday(&tv, NULL) < 0)
209
if (fstat(fd, &st) ||
210
ftruncate(fd, st.st_size + SHIFTDATA) < 0) {
214
/* last place for failure. */
215
if ((void *) (buf = (char *)
216
mmap(NULL, st.st_size + SHIFTDATA,
217
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
222
off = ad->ad_eid[ADEID_RFORK].ade_off;
224
#ifdef USE_MMAPPED_HEADERS
225
/* okay, unmap our old ad header and point it to our local copy */
226
munmap(ad->ad_data, off);
228
#endif /* USER_MMAPPED_HEADERS */
230
/* move the RFORK. this assumes that the RFORK is at the end */
231
memmove(buf + off + SHIFTDATA, buf + off,
232
ad->ad_eid[ADEID_RFORK].ade_len);
234
/* now, fix up our copy of the header */
235
memset(ad->ad_filler, 0, sizeof(ad->ad_filler));
237
/* replace FILEI with FILEDATESI */
238
ad_getattr(ad, &attr);
239
ad->ad_eid[ADEID_FILEDATESI].ade_off = ADEDOFF_FILEDATESI;
240
ad->ad_eid[ADEID_FILEDATESI].ade_len = ADEDLEN_FILEDATESI;
241
ad->ad_eid[ADEID_FILEI].ade_off = 0;
242
ad->ad_eid[ADEID_FILEI].ade_len = 0;
244
/* add in the new entries */
245
ad->ad_eid[ADEID_DID].ade_off = ADEDOFF_DID;
246
ad->ad_eid[ADEID_DID].ade_len = ADEDLEN_DID;
247
ad->ad_eid[ADEID_AFPFILEI].ade_off = ADEDOFF_AFPFILEI;
248
ad->ad_eid[ADEID_AFPFILEI].ade_len = ADEDLEN_AFPFILEI;
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ad->ad_eid[ADEID_SHORTNAME].ade_off = ADEDOFF_SHORTNAME;
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ad->ad_eid[ADEID_SHORTNAME].ade_len = ADEDLEN_INIT;
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ad->ad_eid[ADEID_PRODOSFILEI].ade_off = ADEDOFF_PRODOSFILEI;
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ad->ad_eid[ADEID_PRODOSFILEI].ade_len = ADEDLEN_PRODOSFILEI;
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/* shift the old entries (NAME, COMMENT, FINDERI, RFORK) */
255
ad->ad_eid[ADEID_NAME].ade_off = ADEDOFF_NAME_V2;
256
ad->ad_eid[ADEID_COMMENT].ade_off = ADEDOFF_COMMENT_V2;
257
ad->ad_eid[ADEID_FINDERI].ade_off = ADEDOFF_FINDERI_V2;
258
ad->ad_eid[ADEID_RFORK].ade_off = ADEDOFF_RFORK_V2;
261
ad->ad_version = AD_VERSION2;
263
/* move our data buffer to make space for the new entries. */
264
memmove(buf + ADEDOFF_NAME_V2, buf + ADEDOFF_NAME_V1,
265
ADEDOFF_RFORK_V1 - ADEDOFF_NAME_V1);
267
/* now, fill in the space with appropriate stuff. we're
268
operating as a v2 file now. */
269
ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, tv.tv_sec);
270
memset(ad_entry(ad, ADEID_DID), 0, ADEDLEN_DID);
271
memset(ad_entry(ad, ADEID_AFPFILEI), 0, ADEDLEN_AFPFILEI);
272
ad_setattr(ad, attr);
273
memset(ad_entry(ad, ADEID_SHORTNAME), 0, ADEDLEN_SHORTNAME);
274
memset(ad_entry(ad, ADEID_PRODOSFILEI), 0, ADEDLEN_PRODOSFILEI);
276
/* rebuild the header and cleanup */
277
ad_rebuild_header(ad);
278
munmap(buf, st.st_size + SHIFTDATA);
280
ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0);
282
#ifdef USE_MMAPPED_HEADERS
283
/* now remap our header */
284
ad->ad_data = mmap(NULL, ADEDOFF_RFORK_V2, PROT_READ | PROT_WRITE,
285
(ad_getoflags(ad, ADFLAGS_HF) & O_RDWR) ? MAP_SHARED :
286
MAP_PRIVATE, ad->ad_hf.adf_fd, 0);
287
if (ad->ad_data == MAP_FAILED)
289
#endif /* USE_MMAPPED_HEADERS */
294
ftruncate(fd, st.st_size);
298
ad_tmplock(ad, ADEID_RFORK, ADLOCK_CLR, 0, 0);
302
#endif /* AD_VERSION == AD_VERSION2 */
305
/* read in the entries */
306
static __inline__ void parse_entries(struct adouble *ad, char *buf,
309
u_int32_t eid, len, off;
311
/* now, read in the entry bits */
312
for (; nentries > 0; nentries-- ) {
313
memcpy(&eid, buf, sizeof( eid ));
315
buf += sizeof( eid );
316
memcpy(&off, buf, sizeof( off ));
318
buf += sizeof( off );
319
memcpy(&len, buf, sizeof( len ));
321
buf += sizeof( len );
323
if ( 0 < eid && eid < ADEID_MAX ) {
324
ad->ad_eid[ eid ].ade_off = off;
325
ad->ad_eid[ eid ].ade_len = len;
327
LOG(log_debug, logtype_default, "ad_refresh: nentries %hd eid %d\n",
334
/* this reads enough of the header so that we can figure out all of
335
* the entry lengths and offsets. once that's done, we just read/mmap
336
* the rest of the header in.
338
* NOTE: we're assuming that the resource fork is kept at the end of
339
* the file. also, mmapping won't work for the hfs fs until it
340
* understands how to mmap header files. */
341
static __inline__ int ad_header_read(struct adouble *ad)
343
#ifdef USE_MMAPPED_HEADERS
344
char buf[AD_ENTRY_LEN*ADEID_MAX];
345
#else /* USE_MMAPPED_HEADERS */
346
char *buf = ad->ad_data;
347
#endif /* USE_MMAPPED_HEADERS */
350
static int warning = 0;
352
/* read the header */
353
if ( ad->ad_hf.adf_off != 0 ) {
354
if ( lseek( ad->ad_hf.adf_fd, 0L, SEEK_SET ) < 0L ) {
357
ad->ad_hf.adf_off = 0;
360
if (read( ad->ad_hf.adf_fd, buf, AD_HEADER_LEN) != AD_HEADER_LEN) {
366
ad->ad_hf.adf_off = AD_HEADER_LEN;
368
memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
369
memcpy(&ad->ad_version, buf + ADEDOFF_VERSION,
370
sizeof( ad->ad_version ));
372
/* tag broken v1 headers. just assume they're all right.
373
* we detect two cases: null magic/version
374
* byte swapped magic/version
375
* XXX: in the future, you'll need the v1compat flag.
376
* (ad->ad_flags & ADFLAGS_V1COMPAT) */
377
if (!ad->ad_magic && !ad->ad_version) {
379
LOG(log_debug, logtype_default, "notice: fixing up null v1 magic/version.");
382
ad->ad_magic = AD_MAGIC;
383
ad->ad_version = AD_VERSION1;
385
} else if ((ad->ad_magic == AD_MAGIC) &&
386
(ad->ad_version == AD_VERSION1)) {
388
LOG(log_debug, logtype_default, "notice: fixing up byte-swapped v1 magic/version.");
393
ad->ad_magic = ntohl( ad->ad_magic );
394
ad->ad_version = ntohl( ad->ad_version );
397
if ((ad->ad_magic != AD_MAGIC) || ((ad->ad_version != AD_VERSION1)
398
#if AD_VERSION == AD_VERSION2
399
&& (ad->ad_version != AD_VERSION2)
400
#endif /* AD_VERSION == AD_VERSION2 */
403
LOG(log_debug, logtype_default, "ad_open: can't parse AppleDouble header.");
407
memcpy(ad->ad_filler, buf + ADEDOFF_FILLER, sizeof( ad->ad_filler ));
408
memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
409
nentries = ntohs( nentries );
411
/* read in all the entry headers. if we have more than the
412
* maximum, just hope that the rfork is specified early on. */
413
len = nentries*AD_ENTRY_LEN;
414
#ifdef USE_MMAPPED_HEADERS
415
if (len > sizeof(buf))
417
#else /* USE_MMAPPED_HEADERS */
418
if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
419
len = sizeof(ad->ad_data) - AD_HEADER_LEN;
420
buf += AD_HEADER_LEN;
421
#endif /* USE_MMAPPED_HEADERS */
422
if (read(ad->ad_hf.adf_fd, buf, len) != len) {
425
LOG(log_debug, logtype_default, "ad_header_read: can't read entry info.");
428
ad->ad_hf.adf_off += len;
430
/* figure out all of the entry offsets and lengths. if we aren't
431
* able to read a resource fork entry, bail. */
432
parse_entries(ad, buf, nentries);
433
if (!ad_getentryoff(ad, ADEID_RFORK)
434
#ifndef USE_MMAPPED_HEADERS
435
|| (ad_getentryoff(ad, ADEID_RFORK) > sizeof(ad->ad_data))
436
#endif /* ! USE_MMAPPED_HEADERS */
438
LOG(log_debug, logtype_default, "ad_header_read: problem with rfork entry offset.");
442
/* read/mmap up to the beginning of the resource fork. */
443
#ifdef USE_MMAPPED_HEADERS
444
ad->ad_data = mmap(NULL, ad_getentryoff(ad, ADEID_RFORK),
445
PROT_READ | PROT_WRITE,
446
(ad_getoflags(ad, ADFLAGS_HF) & O_RDWR) ? MAP_SHARED :
447
MAP_PRIVATE, ad->ad_hf.adf_fd, 0);
448
if (ad->ad_data == MAP_FAILED)
450
#else /* USE_MMAPPED_HEADERS */
452
len = ad_getentryoff(ad, ADEID_RFORK) - ad->ad_hf.adf_off;
453
if (read(ad->ad_hf.adf_fd, buf, len) != len) {
456
LOG(log_debug, logtype_default, "ad_header_read: can't read in entries.");
459
#endif /* USE_MMAPPED_HEADERS */
461
/* fix up broken dates */
462
if (ad->ad_version == AD_VERSION1) {
466
if (fstat(ad->ad_hf.adf_fd, &st) < 0) {
467
return 1; /* fail silently */
470
/* check to see if the ad date is wrong. just see if we have
471
* a modification date in the future. */
472
if (((ad_getdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, &aint)) == 0) &&
473
(aint > TIMEWARP_DELTA + st.st_mtime)) {
474
ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, aint - AD_DATE_DELTA);
475
ad_getdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, &aint);
476
ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, aint - AD_DATE_DELTA);
477
ad_getdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, &aint);
478
ad_setdate(ad, AD_DATE_BACKUP | AD_DATE_UNIX, aint - AD_DATE_DELTA);
487
* Put the .AppleDouble where it needs to be:
491
* \ b/.AppleDouble/.Parent
494
ad_path( path, adflags )
498
static char pathbuf[ MAXPATHLEN + 1];
499
char c, *slash, buf[MAXPATHLEN + 1];
501
strncpy(buf, path, MAXPATHLEN);
502
if ( adflags & ADFLAGS_DIR ) {
503
strncpy( pathbuf, buf, MAXPATHLEN );
504
if ( *buf != '\0' ) {
505
strcat( pathbuf, "/" );
509
if (( slash = strrchr( buf, '/' )) != NULL ) {
512
strncpy( pathbuf, buf, MAXPATHLEN);
519
strncat( pathbuf, ".AppleDouble/", MAXPATHLEN - strlen(pathbuf));
520
strncat( pathbuf, slash, MAXPATHLEN - strlen(pathbuf));
526
* Support inherited protection modes for AppleDouble files. The supplied
527
* mode is ANDed with the parent directory's mask value in lieu of "umask",
528
* and that value is returned.
531
#define DEFMASK 07700 /* be conservative */
537
static char modebuf[ MAXPATHLEN + 1];
540
if ( strlen( path ) >= MAXPATHLEN ) {
541
return NULL; /* can't do it */
545
* For a path with directories in it, remove the final component
546
* (path or subdirectory name) to get the name we want to stat.
547
* For a path which is just a filename, use "." instead.
549
strcpy( modebuf, path );
550
if (( slash = strrchr( modebuf, '/' )) != NULL ) {
551
*slash = '\0'; /* remove pathname component */
553
modebuf[0] = '.'; /* use current directory */
560
ad_mode( path, mode )
568
return( mode ); /* save on syscalls */
572
return( mode & DEFMASK ); /* can't do it */
575
if ( stat( p, &stbuf ) != 0 ) {
576
return( mode & DEFMASK ); /* bail out... can't stat dir? */
579
return( mode & stbuf.st_mode );
583
* Use mkdir() with mode bits taken from ad_mode().
586
ad_mkdir( path, mode )
591
LOG(log_info, logtype_default, "ad_mkdir: Creating directory with mode %d", mode);
593
return mkdir( path, ad_mode( path, mode ) );
598
* It's not possible to open the header file O_RDONLY -- the read
599
* will fail and return an error. this refcounts things now.
601
int ad_open( path, adflags, oflags, mode, ad )
603
int adflags, oflags, mode;
606
const struct entry *eid;
612
if (ad->ad_inited != AD_INITED) {
615
adf_lock_init(&ad->ad_df);
616
adf_lock_init(&ad->ad_hf);
617
#ifdef USE_MMAPPED_HEADERS
618
ad->ad_data = MAP_FAILED;
619
#endif /* USE_MMAPPED_HEADERS */
620
ad->ad_inited = AD_INITED;
624
if (adflags & ADFLAGS_DF) {
625
if (ad_dfileno(ad) == -1) {
626
hoflags = (oflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
627
admode = ad_mode( path, mode );
628
if (( ad->ad_df.adf_fd = open( path, hoflags, admode )) < 0 ) {
629
if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
631
ad->ad_df.adf_fd =open( path, hoflags, admode );
634
if ( ad->ad_df.adf_fd < 0)
636
ad->ad_df.adf_off = 0;
637
ad->ad_df.adf_flags = hoflags;
640
/* the file is already open... but */
641
if ((oflags & ( O_RDWR | O_WRONLY)) && /* we want write access */
642
!(ad->ad_df.adf_flags & ( O_RDWR | O_WRONLY))) /* and it was denied the first time */
648
ad->ad_df.adf_refcount++;
651
if (adflags & ADFLAGS_HF) {
652
if (ad_hfileno(ad) == -1) {
653
ad_p = ad_path( path, adflags );
655
hoflags = oflags & ~O_CREAT;
656
hoflags = (hoflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
657
if (( ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 )) < 0 ) {
658
if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
659
hoflags = oflags & ~O_CREAT;
660
ad->ad_hf.adf_fd = open( ad_p, hoflags, 0 );
663
if ( ad->ad_hf.adf_fd < 0 ) {
664
if (errno == ENOENT && (oflags & O_CREAT) ) {
666
* We're expecting to create a new adouble header file,
668
* if ((oflags & O_CREAT) ==> (oflags & O_RDWR)
670
admode = ad_hf_mode(ad_mode( ad_p, mode ));
672
if (( ad->ad_hf.adf_fd = open( ad_p, oflags,
675
* Probably .AppleDouble doesn't exist, try to
678
if ((errno == ENOENT) &&
679
((adflags & ADFLAGS_NOADOUBLE) == 0)) {
680
if (( slash = strrchr( ad_p, '/' )) == NULL ) {
681
ad_close( ad, adflags );
686
if ( ad_mkdir( ad_p, 0777 ) < 0 ) {
687
ad_close( ad, adflags );
691
if (( ad->ad_hf.adf_fd =
692
open( ad_p, oflags, ad_mode( ad_p, mode) )) < 0 ) {
693
ad_close( ad, adflags );
697
ad_close( ad, adflags );
701
ad->ad_hf.adf_flags = oflags;
703
ad_close( ad, adflags );
706
} else if ((fstat(ad->ad_hf.adf_fd, &st) == 0) &&
708
/* for 0 length files, treat them as new. */
709
ad->ad_hf.adf_flags = (oflags & ~O_RDONLY) | O_RDWR;
711
ad->ad_hf.adf_flags = hoflags;
713
ad->ad_hf.adf_off = 0;
716
* This is a new adouble header file. Initialize the structure,
717
* instead of reading it.
719
memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
720
if ( ad->ad_hf.adf_flags & ( O_TRUNC | O_CREAT )) {
723
ad->ad_magic = AD_MAGIC;
724
ad->ad_version = AD_VERSION;
725
memset(ad->ad_filler, 0, sizeof( ad->ad_filler ));
727
#ifdef USE_MMAPPED_HEADERS
728
/* truncate the header file and mmap it. */
729
ftruncate(ad->ad_hf.adf_fd, AD_DATASZ);
730
ad->ad_data = mmap(NULL, AD_DATASZ, PROT_READ | PROT_WRITE,
731
MAP_SHARED, ad->ad_hf.adf_fd, 0);
732
if (ad->ad_data == MAP_FAILED) {
733
ad_close(ad, adflags);
736
#else /* USE_MMAPPED_HEADERS */
737
memset(ad->ad_data, 0, sizeof(ad->ad_data));
738
#endif /* USE_MMAPPED_HEADERS */
742
ad->ad_eid[eid->id].ade_off = eid->offset;
743
ad->ad_eid[eid->id].ade_len = eid->len;
747
/* put something sane in the directory finderinfo */
748
if (adflags & ADFLAGS_DIR) {
749
/* set default view */
750
ashort = htons(FINDERINFO_CLOSEDVIEW);
751
memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRVIEWOFF,
752
&ashort, sizeof(ashort));
754
/* set default creator/type fields */
755
memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRTYPEOFF,
757
memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRCREATOFF,
761
/* make things invisible */
762
if ((*path == '.') && strcmp(path, ".") && strcmp(path, "..")) {
763
ashort = htons(ATTRBIT_INVISIBLE);
764
ad_setattr(ad, ashort);
765
ashort = htons(FINDERINFO_INVISIBLE);
766
memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRFLAGOFF,
767
&ashort, sizeof(ashort));
770
if (gettimeofday(&tv, NULL) < 0) {
771
ad_close(ad, adflags);
775
/* put something sane in the date fields */
776
ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, tv.tv_sec);
777
ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, tv.tv_sec);
778
ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, tv.tv_sec);
779
ad_setdate(ad, AD_DATE_BACKUP, AD_DATE_START);
783
* Read the adouble header in and parse it.
785
if ((ad_header_read( ad ) < 0)
786
#if AD_VERSION == AD_VERSION2
787
|| (ad_v1tov2(ad, ad_p) < 0)
788
#endif /* AD_VERSION == AD_VERSION2 */
790
ad_close( ad, adflags );
795
else { /* already open */
796
if ((oflags & ( O_RDWR | O_WRONLY)) &&
797
!(ad->ad_hf.adf_flags & ( O_RDWR | O_WRONLY))) {
798
if (adflags & ADFLAGS_DF) {
799
/* don't call with ADFLAGS_HF because we didn't open ressource fork */
800
ad_close( ad, ADFLAGS_DF );
806
ad->ad_hf.adf_refcount++;
812
/* to do this with mmap, we need the hfs fs to understand how to mmap
814
int ad_refresh(struct adouble *ad)
816
#ifdef USE_MMAPPED_HEADERS
818
#endif /* USE_MMAPPED_HEADERS */
820
if (ad->ad_hf.adf_fd < -1)
823
#ifdef USE_MMAPPED_HEADERS
824
if (ad->ad_data == MAP_FAILED)
827
/* re-read the header */
828
off = ad_getentryoff(ad, ADEID_RFORK);
829
memcpy(&nentries, ad->ad_data + ADEDOFF_NENTRIES, sizeof(nentries));
830
nentries = ntohs(nentries);
831
parse_entries(ad, ad->ad_data + AD_HEADER_LEN, nentries);
833
/* check to see if something screwy happened */
834
if (!ad_getentryoff(ad, ADEID_RFORK))
837
/* if there's a length discrepancy, remap the header. this shouldn't
838
* really ever happen. */
839
if (off != ad_getentryoff(ad, ADEID_RFORK)) {
840
char *buf = ad->ad_data;
842
ad->ad_data = mmap(NULL, ad_getentryoff(ad, ADEID_RFORK),
843
PROT_READ | PROT_WRITE,
844
(ad_getoflags(ad, ADFLAGS_HF) & O_RDWR) ?
845
MAP_SHARED : MAP_PRIVATE, ad->ad_hf.adf_fd, 0);
846
if (ad->ad_data == MAP_FAILED) {
854
#else /* USE_MMAPPED_HEADERS */
855
return ad_header_read(ad);
856
#endif /* USE_MMAPPED_HEADERS */
added
removed
libatalk/adouble/ad_open.c
