2 * Copyright (c) 1999 Adrian Sun (asun@u.washington.edu)
3 * Copyright (c) 1990,1991 Regents of The University of Michigan.
4 * Copyright (c) 2010 Frank Lahm
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
30 * Part of Netatalk's AppleDouble implementatation
31 * @sa include/atalk/adouble.h
36 #endif /* HAVE_CONFIG_H */
39 #include <sys/param.h>
43 #include <arpa/inet.h>
45 #include <atalk/logger.h>
46 #include <atalk/adouble.h>
47 #include <atalk/util.h>
49 #include <atalk/bstrlib.h>
50 #include <atalk/bstradd.h>
51 #include <atalk/compat.h>
52 #include <atalk/errchk.h>
53 #include <atalk/volume.h>
57 #define ADEDOFF_MAGIC (0)
58 #define ADEDOFF_VERSION (ADEDOFF_MAGIC + ADEDLEN_MAGIC)
59 #define ADEDOFF_FILLER (ADEDOFF_VERSION + ADEDLEN_VERSION)
60 #define ADEDOFF_NENTRIES (ADEDOFF_FILLER + ADEDLEN_FILLER)
62 /* initial lengths of some of the fields */
63 #define ADEDLEN_INIT 0
65 /* i stick things in a slightly different order than their eid order in
66 * case i ever want to separate RootInfo behaviour from the rest of the
70 #define ADEDOFF_NAME_V2 (AD_HEADER_LEN + ADEID_NUM_V2*AD_ENTRY_LEN)
71 #define ADEDOFF_COMMENT_V2 (ADEDOFF_NAME_V2 + ADEDLEN_NAME)
72 #define ADEDOFF_FILEDATESI (ADEDOFF_COMMENT_V2 + ADEDLEN_COMMENT)
73 #define ADEDOFF_FINDERI_V2 (ADEDOFF_FILEDATESI + ADEDLEN_FILEDATESI)
74 #define ADEDOFF_DID (ADEDOFF_FINDERI_V2 + ADEDLEN_FINDERI)
75 #define ADEDOFF_AFPFILEI (ADEDOFF_DID + ADEDLEN_DID)
76 #define ADEDOFF_SHORTNAME (ADEDOFF_AFPFILEI + ADEDLEN_AFPFILEI)
77 #define ADEDOFF_PRODOSFILEI (ADEDOFF_SHORTNAME + ADEDLEN_SHORTNAME)
78 #define ADEDOFF_PRIVDEV (ADEDOFF_PRODOSFILEI + ADEDLEN_PRODOSFILEI)
79 #define ADEDOFF_PRIVINO (ADEDOFF_PRIVDEV + ADEDLEN_PRIVDEV)
80 #define ADEDOFF_PRIVSYN (ADEDOFF_PRIVINO + ADEDLEN_PRIVINO)
81 #define ADEDOFF_PRIVID (ADEDOFF_PRIVSYN + ADEDLEN_PRIVSYN)
82 #define ADEDOFF_RFORK_V2 (ADEDOFF_PRIVID + ADEDLEN_PRIVID)
85 #define ADEDOFF_FINDERI_EA (AD_HEADER_LEN + ADEID_NUM_EA * AD_ENTRY_LEN)
86 #define ADEDOFF_COMMENT_EA (ADEDOFF_FINDERI_EA + ADEDLEN_FINDERI)
87 #define ADEDOFF_FILEDATESI_EA (ADEDOFF_COMMENT_EA + ADEDLEN_COMMENT)
88 #define ADEDOFF_AFPFILEI_EA (ADEDOFF_FILEDATESI_EA + ADEDLEN_FILEDATESI)
89 #define ADEDOFF_PRIVDEV_EA (ADEDOFF_AFPFILEI_EA + ADEDLEN_AFPFILEI)
90 #define ADEDOFF_PRIVINO_EA (ADEDOFF_PRIVDEV_EA + ADEDLEN_PRIVDEV)
91 #define ADEDOFF_PRIVSYN_EA (ADEDOFF_PRIVINO_EA + ADEDLEN_PRIVINO)
92 #define ADEDOFF_PRIVID_EA (ADEDOFF_PRIVSYN_EA + ADEDLEN_PRIVSYN)
94 /* this is to prevent changing timezones from causing problems with
95 localtime volumes. the screw-up is 30 years. we use a delta of 5 years */
96 #define TIMEWARP_DELTA 157680000
99 uint32_t id, offset, len;
102 /* --------------------------- */
103 static uid_t default_uid = -1;
105 /* Forward declarations */
106 static int ad_mkrf(const char *path);
107 static int ad_header_read(const char *path, struct adouble *ad, struct stat *hst);
108 static int ad_header_upgrade(struct adouble *ad, const char *name);
110 static int ad_mkrf_ea(const char *path);
111 static int ad_header_read_ea(const char *path, struct adouble *ad, struct stat *hst);
112 static int ad_header_upgrade_ea(struct adouble *ad, const char *name);
113 static int ad_reso_size(const char *path, int adflags, struct adouble *ad);
114 static int ad_mkrf_osx(const char *path);
117 static struct adouble_fops ad_adouble = {
120 &ad_rebuild_adouble_header,
125 static struct adouble_fops ad_adouble_ea = {
133 &ad_rebuild_adouble_header,
135 &ad_header_upgrade_ea,
138 static struct adouble_fops ad_osx = {
141 &ad_rebuild_adouble_header,
146 static const struct entry entry_order2[ADEID_NUM_V2 + 1] = {
147 {ADEID_NAME, ADEDOFF_NAME_V2, ADEDLEN_INIT},
148 {ADEID_COMMENT, ADEDOFF_COMMENT_V2, ADEDLEN_INIT},
149 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI, ADEDLEN_FILEDATESI},
150 {ADEID_FINDERI, ADEDOFF_FINDERI_V2, ADEDLEN_FINDERI},
151 {ADEID_DID, ADEDOFF_DID, ADEDLEN_DID},
152 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI, ADEDLEN_AFPFILEI},
153 {ADEID_SHORTNAME, ADEDOFF_SHORTNAME, ADEDLEN_INIT},
154 {ADEID_PRODOSFILEI, ADEDOFF_PRODOSFILEI, ADEDLEN_PRODOSFILEI},
155 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV, ADEDLEN_INIT},
156 {ADEID_PRIVINO, ADEDOFF_PRIVINO, ADEDLEN_INIT},
157 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN, ADEDLEN_INIT},
158 {ADEID_PRIVID, ADEDOFF_PRIVID, ADEDLEN_INIT},
159 {ADEID_RFORK, ADEDOFF_RFORK_V2, ADEDLEN_INIT},
163 /* Using Extended Attributes */
164 static const struct entry entry_order_ea[ADEID_NUM_EA + 1] = {
165 {ADEID_FINDERI, ADEDOFF_FINDERI_EA, ADEDLEN_FINDERI},
166 {ADEID_COMMENT, ADEDOFF_COMMENT_EA, ADEDLEN_INIT},
167 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI_EA, ADEDLEN_FILEDATESI},
168 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI_EA, ADEDLEN_AFPFILEI},
169 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV_EA, ADEDLEN_INIT},
170 {ADEID_PRIVINO, ADEDOFF_PRIVINO_EA, ADEDLEN_INIT},
171 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN_EA, ADEDLEN_INIT},
172 {ADEID_PRIVID, ADEDOFF_PRIVID_EA, ADEDLEN_INIT},
176 /* fallback for EAs */
177 static const struct entry entry_order_osx[ADEID_NUM_OSX +1] = {
178 {ADEID_FINDERI, ADEDOFF_FINDERI_OSX, ADEDLEN_FINDERI},
179 {ADEID_RFORK, ADEDOFF_RFORK_OSX, ADEDLEN_INIT},
183 #define ADFLAGS2LOGSTRBUFSIZ 128
184 const char *adflags2logstr(int adflags)
187 static char buf[ADFLAGS2LOGSTRBUFSIZ];
191 if (adflags & ADFLAGS_DF) {
192 strlcat(buf, "DF", ADFLAGS2LOGSTRBUFSIZ);
195 if (adflags & ADFLAGS_RF) {
197 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
198 strlcat(buf, "RF", ADFLAGS2LOGSTRBUFSIZ);
201 if (adflags & ADFLAGS_NORF) {
203 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
204 strlcat(buf, "NORF", ADFLAGS2LOGSTRBUFSIZ);
207 if (adflags & ADFLAGS_HF) {
209 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
210 strlcat(buf, "HF", ADFLAGS2LOGSTRBUFSIZ);
213 if (adflags & ADFLAGS_NOHF) {
215 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
216 strlcat(buf, "NOHF", ADFLAGS2LOGSTRBUFSIZ);
219 if (adflags & ADFLAGS_DIR) {
221 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
222 strlcat(buf, "DIR", ADFLAGS2LOGSTRBUFSIZ);
225 if (adflags & ADFLAGS_CHECK_OF) {
227 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
228 strlcat(buf, "OF", ADFLAGS2LOGSTRBUFSIZ);
231 if (adflags & ADFLAGS_SETSHRMD) {
233 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
234 strlcat(buf, "SHRMD", ADFLAGS2LOGSTRBUFSIZ);
237 if (adflags & ADFLAGS_RDWR) {
239 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
240 strlcat(buf, "O_RDWR", ADFLAGS2LOGSTRBUFSIZ);
243 if (adflags & ADFLAGS_RDONLY) {
245 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
246 strlcat(buf, "O_RDONLY", ADFLAGS2LOGSTRBUFSIZ);
249 if (adflags & ADFLAGS_CREATE) {
251 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
252 strlcat(buf, "O_CREAT", ADFLAGS2LOGSTRBUFSIZ);
255 if (adflags & ADFLAGS_EXCL) {
257 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
258 strlcat(buf, "O_EXCL", ADFLAGS2LOGSTRBUFSIZ);
261 if (adflags & ADFLAGS_TRUNC) {
263 strlcat(buf, "|", ADFLAGS2LOGSTRBUFSIZ);
264 strlcat(buf, "O_TRUNC", ADFLAGS2LOGSTRBUFSIZ);
271 #define OPENFLAGS2LOGSTRBUFSIZ 128
272 const char *openflags2logstr(int oflags)
275 static char buf[OPENFLAGS2LOGSTRBUFSIZ];
279 if ((oflags & O_RDONLY) || (oflags == O_RDONLY)) {
280 strlcat(buf, "O_RDONLY", OPENFLAGS2LOGSTRBUFSIZ);
283 if (oflags & O_RDWR) {
285 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
286 strlcat(buf, "O_RDWR", OPENFLAGS2LOGSTRBUFSIZ);
289 if (oflags & O_CREAT) {
291 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
292 strlcat(buf, "O_CREAT", OPENFLAGS2LOGSTRBUFSIZ);
295 if (oflags & O_TRUNC) {
297 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
298 strlcat(buf, "O_TRUNC", OPENFLAGS2LOGSTRBUFSIZ);
301 if (oflags & O_EXCL) {
303 strlcat(buf, "|", OPENFLAGS2LOGSTRBUFSIZ);
304 strlcat(buf, "O_EXCL", OPENFLAGS2LOGSTRBUFSIZ);
310 static uint32_t get_eid(uint32_t eid)
315 return ADEID_PRIVDEV;
317 return ADEID_PRIVINO;
319 return ADEID_PRIVSYN;
326 /* ----------------------------------- */
327 static int new_ad_header(struct adouble *ad, const char *path, struct stat *stp, int adflags)
329 const struct entry *eid;
333 LOG(log_debug, logtype_default, "new_ad_header(\"%s\")", path);
337 if (lstat(path, &st) != 0)
341 ad->ad_magic = AD_MAGIC;
342 ad->ad_version = ad->ad_vers & 0x0f0000;
343 if (!ad->ad_version) {
344 ad->ad_version = AD_VERSION;
347 memset(ad->ad_data, 0, sizeof(ad->ad_data));
349 if (ad->ad_vers == AD_VERSION2)
351 else if (ad->ad_vers == AD_VERSION_EA)
352 eid = entry_order_ea;
353 else if (ad->ad_vers == AD_VERSION2_OSX)
354 eid = entry_order_osx;
360 ad->ad_eid[eid->id].ade_off = eid->offset;
361 ad->ad_eid[eid->id].ade_len = eid->len;
365 /* put something sane in the directory finderinfo */
366 if (ad->ad_vers != AD_VERSION2_OSX) {
367 if ((adflags & ADFLAGS_DIR)) {
368 /* set default view */
369 ashort = htons(FINDERINFO_CLOSEDVIEW);
370 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRVIEWOFF, &ashort, sizeof(ashort));
372 /* set default creator/type fields */
373 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRTYPEOFF,"\0\0\0\0", 4);
374 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRCREATOFF,"\0\0\0\0", 4);
377 /* make things invisible */
378 if ((ad->ad_options & ADVOL_INVDOTS)
380 && !((adflags & ADFLAGS_DIR) && (path[1] == 0))
382 ashort = htons(ATTRBIT_INVISIBLE);
383 ad_setattr(ad, ashort);
384 ashort = htons(FINDERINFO_INVISIBLE);
385 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRFLAGOFF, &ashort, sizeof(ashort));
388 /* put something sane in the date fields */
389 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, stp->st_mtime);
390 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, stp->st_mtime);
391 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, stp->st_mtime);
392 ad_setdate(ad, AD_DATE_BACKUP, AD_DATE_START);
397 /* -------------------------------------
400 static void parse_entries(struct adouble *ad, char *buf, uint16_t nentries)
402 uint32_t eid, len, off;
405 /* now, read in the entry bits */
406 for (; nentries > 0; nentries-- ) {
407 memcpy(&eid, buf, sizeof( eid ));
408 eid = get_eid(ntohl(eid));
409 buf += sizeof( eid );
410 memcpy(&off, buf, sizeof( off ));
412 buf += sizeof( off );
413 memcpy(&len, buf, sizeof( len ));
415 buf += sizeof( len );
419 && off < sizeof(ad->ad_data)
420 && (off + len <= sizeof(ad->ad_data) || eid == ADEID_RFORK)) {
421 ad->ad_eid[ eid ].ade_off = off;
422 ad->ad_eid[ eid ].ade_len = len;
423 } else if (!warning) {
425 LOG(log_warning, logtype_default, "parse_entries: bogus eid: %d", eid);
430 /* this reads enough of the header so that we can figure out all of
431 * the entry lengths and offsets. once that's done, we just read/mmap
432 * the rest of the header in.
434 * NOTE: we're assuming that the resource fork is kept at the end of
435 * the file. also, mmapping won't work for the hfs fs until it
436 * understands how to mmap header files. */
437 static int ad_header_read(const char *path _U_, struct adouble *ad, struct stat *hst)
439 char *buf = ad->ad_data;
445 /* read the header */
446 if ((header_len = adf_pread( ad->ad_mdp, buf, AD_DATASZ, 0)) < 0) {
449 if (header_len < AD_HEADER_LEN) {
454 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
455 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
456 ad->ad_magic = ntohl( ad->ad_magic );
457 ad->ad_version = ntohl( ad->ad_version );
459 if ((ad->ad_magic != AD_MAGIC) || (ad->ad_version != AD_VERSION2)) {
460 LOG(log_error, logtype_default, "ad_open: can't parse AppleDouble header.");
465 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
466 nentries = ntohs( nentries );
468 /* read in all the entry headers. if we have more than the
469 * maximum, just hope that the rfork is specified early on. */
470 len = nentries*AD_ENTRY_LEN;
472 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
473 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
475 buf += AD_HEADER_LEN;
476 if (len > header_len - AD_HEADER_LEN) {
477 LOG(log_error, logtype_default, "ad_header_read: can't read entry info.");
482 /* figure out all of the entry offsets and lengths. if we aren't
483 * able to read a resource fork entry, bail. */
484 nentries = len / AD_ENTRY_LEN;
485 parse_entries(ad, buf, nentries);
486 if (!ad_getentryoff(ad, ADEID_RFORK)
487 || (ad_getentryoff(ad, ADEID_RFORK) > sizeof(ad->ad_data))
489 LOG(log_error, logtype_default, "ad_header_read: problem with rfork entry offset.");
494 if (ad_getentryoff(ad, ADEID_RFORK) > header_len) {
495 LOG(log_error, logtype_default, "ad_header_read: can't read in entries.");
502 if (fstat(ad->ad_mdp->adf_fd, &st) < 0) {
503 return 1; /* fail silently */
507 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
512 /* Read an ._ file, only uses the resofork, finderinfo is taken from EA */
513 static int ad_header_read_osx(const char *path _U_, struct adouble *ad, struct stat *hst)
516 struct adouble adosx;
517 char *buf = &adosx.ad_data[0];
523 memset(buf, 0, sizeof(adosx.ad_data));
525 /* read the header */
526 EC_NEG1( header_len = adf_pread(ad->ad_rfp, buf, AD_DATASZ_OSX, 0) );
528 if (header_len < AD_HEADER_LEN) {
533 memcpy(&adosx.ad_magic, buf, sizeof(adosx.ad_magic));
534 memcpy(&adosx.ad_version, buf + ADEDOFF_VERSION, sizeof(adosx.ad_version));
535 adosx.ad_magic = ntohl(adosx.ad_magic);
536 adosx.ad_version = ntohl(adosx.ad_version);
538 if ((adosx.ad_magic != AD_MAGIC) || (adosx.ad_version != AD_VERSION2)) {
539 LOG(log_error, logtype_afpd, "ad_header_read_osx: can't parse AppleDouble header");
544 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
545 nentries = ntohs(nentries);
546 len = nentries * AD_ENTRY_LEN;
548 if (len + AD_HEADER_LEN > sizeof(adosx.ad_data))
549 len = sizeof(adosx.ad_data) - AD_HEADER_LEN;
551 buf += AD_HEADER_LEN;
552 if (len > header_len - AD_HEADER_LEN) {
553 LOG(log_error, logtype_afpd, "ad_header_read_osx: can't read entry info.");
558 nentries = len / AD_ENTRY_LEN;
559 parse_entries(&adosx, buf, nentries);
561 if (ad_getentryoff(&adosx, ADEID_RFORK) == 0
562 || ad_getentryoff(&adosx, ADEID_RFORK) > sizeof(ad->ad_data)
563 || ad_getentryoff(&adosx, ADEID_RFORK) > header_len
565 LOG(log_error, logtype_afpd, "ad_header_read_osx: problem with rfork entry offset.");
572 EC_NEG1( fstat(ad_reso_fileno(ad), &st) );
575 ad_setentryoff(ad, ADEID_RFORK, ad_getentryoff(&adosx, ADEID_RFORK));
576 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
582 static int ad_header_read_ea(const char *path, struct adouble *ad, struct stat *hst _U_)
587 char *buf = ad->ad_data;
589 if (ad_meta_fileno(ad) != -1)
590 header_len = sys_fgetxattr(ad_meta_fileno(ad), AD_EA_META, ad->ad_data, AD_DATASZ_EA);
592 header_len = sys_lgetxattr(path, AD_EA_META, ad->ad_data, AD_DATASZ_EA);
593 if (header_len < 1) {
594 LOG(log_debug, logtype_default, "ad_header_read_ea: %s", strerror(errno));
598 if (header_len < AD_HEADER_LEN) {
599 LOG(log_error, logtype_default, "ad_header_read_ea: bogus AppleDouble header.");
604 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
605 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
607 ad->ad_magic = ntohl( ad->ad_magic );
608 ad->ad_version = ntohl( ad->ad_version );
610 if ((ad->ad_magic != AD_MAGIC) || (ad->ad_version != AD_VERSION2)) {
611 LOG(log_error, logtype_default, "ad_header_read_ea: wrong magic or version");
616 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
617 nentries = ntohs( nentries );
619 /* Protect against bogus nentries */
620 len = nentries * AD_ENTRY_LEN;
621 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
622 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
623 if (len > header_len - AD_HEADER_LEN) {
624 LOG(log_error, logtype_default, "ad_header_read_ea: can't read entry info.");
628 nentries = len / AD_ENTRY_LEN;
630 /* Now parse entries */
631 parse_entries(ad, buf + AD_HEADER_LEN, nentries);
637 * Takes a path to an AppleDouble file and creates the parrent .AppleDouble directory
640 * path: "/path/.AppleDouble/file"
641 * => mkdir("/path/.AppleDouble/") (in ad_mkdir())
643 static int ad_mkrf(const char *path)
647 * Probably .AppleDouble doesn't exist, try to mkdir it.
649 if (NULL == ( slash = strrchr( path, '/' )) ) {
654 if ( ad_mkdir( path, 0777 ) < 0 ) {
661 static int ad_mkrf_ea(const char *path _U_)
663 AFP_PANIC("ad_mkrf_ea: dont use");
667 static int ad_mkrf_osx(const char *path _U_)
673 if we are root change path user/ group
674 It can be a native function for BSD cf. FAQ.Q10
675 path: pathname to chown
676 stbuf: parent directory inode
678 use fstat and fchown or lchown with linux?
680 #define EMULATE_SUIDDIR
682 static int ad_chown(const char *path, struct stat *stbuf)
685 #ifdef EMULATE_SUIDDIR
688 if (default_uid != (uid_t)-1) {
689 /* we are root (admin) */
690 id = (default_uid)?default_uid:stbuf->st_uid;
691 ret = lchown( path, id, stbuf->st_gid );
697 #define DEFMASK 07700 /* be conservative */
700 return access right and inode of path parent directory
702 static int ad_mode_st(const char *path, mode_t *mode, struct stat *stbuf)
707 if (ad_stat(path, stbuf) != 0) {
711 *mode &= stbuf->st_mode;
715 /* --------------------------- */
716 static int ad_header_upgrade(struct adouble *ad _U_, const char *name _U_)
721 static int ad_header_upgrade_ea(struct adouble *ad _U_, const char *name _U_)
723 AFP_PANIC("ad_header_upgrade_ea: dont use");
728 * Error handling for adouble header(=metadata) file open error
730 * We're called because opening ADFLAGS_HF caused an error.
731 * 1. In case ad_open is called with ADFLAGS_NOHF the error is suppressed.
732 * 2. If ad_open was called with ADFLAGS_DF we may have opened the datafork and thus
733 * ought to close it before returning with an error condition.
735 static int ad_error(struct adouble *ad, int adflags)
738 if (adflags & ADFLAGS_NOHF) { /* 1 */
741 if (adflags & (ADFLAGS_DF | ADFLAGS_SETSHRMD | ADFLAGS_CHECK_OF)) { /* 2 */
742 ad_close( ad, ADFLAGS_DF );
749 * Map ADFLAGS to open() flags
751 * @param adfile (r) the file you really want to open: ADFLAGS_DF or ADFLAGS_HF
752 * @param adflags (r) flags from ad_open(..., adflags, ...)
753 * @returns mapped flags suitable for calling open()
755 static int ad2openflags(const struct adouble *ad, int adfile, int adflags)
759 if (adflags & ADFLAGS_RDWR)
761 if (adflags & ADFLAGS_RDONLY) {
762 if (((adfile == ADFLAGS_DF || adfile == ADFLAGS_RF) && (adflags & ADFLAGS_SETSHRMD))
763 /* need rw access for locks */
764 || ((adfile == ADFLAGS_HF) && (ad->ad_vers == AD_VERSION2)))
765 /* need rw access for adouble file for the case:
766 1) openfork(data+meta:O_RDONLY), 2) openfork(reso(=meta):O_RDWR) */
771 if (adflags & ADFLAGS_CREATE)
773 if (adflags & ADFLAGS_EXCL)
775 if (adflags & ADFLAGS_TRUNC)
781 static int ad_open_df(const char *path, int adflags, mode_t mode, struct adouble *ad)
790 LOG(log_debug, logtype_default,
791 "ad_open_df(\"%s\", %s): BEGIN [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
792 fullpathname(path), adflags2logstr(adflags),
793 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
794 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
795 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
797 if (ad_data_fileno(ad) != -1) {
798 /* the file is already open, but we want write access: */
799 if ((adflags & ADFLAGS_RDWR)
800 /* and it was denied the first time: */
801 && (ad->ad_data_fork.adf_flags & O_RDONLY)) {
805 /* it's not new anymore */
806 ad->ad_data_fork.adf_flags &= ~( O_TRUNC | O_CREAT );
807 ad->ad_data_fork.adf_refcount++;
811 oflags = O_NOFOLLOW | ad2openflags(ad, ADFLAGS_DF, adflags);
814 if ((adflags & ADFLAGS_CREATE)) {
815 st_invalid = ad_mode_st(path, &admode, &st_dir);
816 if ((ad->ad_options & ADVOL_UNIXPRIV))
820 ad->ad_data_fork.adf_fd = open(path, oflags, admode);
822 if (ad->ad_data_fork.adf_fd == -1) {
827 if ((adflags & ADFLAGS_SETSHRMD) && (adflags & ADFLAGS_RDONLY)) {
830 EC_NEG1( ad->ad_data_fork.adf_fd = open(path, oflags, admode) );
834 case OPEN_NOFOLLOW_ERRNO:
835 ad->ad_data_fork.adf_syml = malloc(MAXPATHLEN+1);
836 if ((lsz = readlink(path, ad->ad_data_fork.adf_syml, MAXPATHLEN)) <= 0) {
837 free(ad->ad_data_fork.adf_syml);
840 ad->ad_data_fork.adf_syml[lsz] = 0;
841 ad->ad_data_fork.adf_fd = -2; /* -2 means its a symlink */
849 ad_chown(path, &st_dir); /* just created, set owner if admin (root) */
851 ad->ad_data_fork.adf_flags = oflags;
852 adf_lock_init(&ad->ad_data_fork);
853 ad->ad_data_fork.adf_refcount++;
856 LOG(log_debug, logtype_default,
857 "ad_open_df(\"%s\", %s): END: %d [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
858 fullpathname(path), adflags2logstr(adflags), ret,
859 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
860 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
861 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
865 static int ad_open_hf_v2(const char *path, int adflags, mode_t mode, struct adouble *ad)
870 struct stat *pst = NULL;
872 int oflags, nocreatflags, opened = 0;
876 LOG(log_debug, logtype_default,
877 "ad_open_hf_v2(\"%s\", %s): BEGIN [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
878 fullpathname(path), adflags2logstr(adflags),
879 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
880 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
881 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
883 if (ad_meta_fileno(ad) != -1) {
884 /* the file is already open, but we want write access: */
885 if ((adflags & ADFLAGS_RDWR) &&
886 /* and it was already denied: */
887 (ad->ad_mdp->adf_flags & O_RDONLY)) {
891 ad_refresh(path, ad);
892 /* it's not new anymore */
893 ad->ad_mdp->adf_flags &= ~( O_TRUNC | O_CREAT );
894 ad->ad_mdp->adf_refcount++;
898 ad_p = ad->ad_ops->ad_path(path, adflags);
899 oflags = O_NOFOLLOW | ad2openflags(ad, ADFLAGS_HF, adflags);
900 LOG(log_debug, logtype_default,"ad_open_hf_v2(\"%s\"): open flags: %s",
901 fullpathname(path), openflags2logstr(oflags));
902 nocreatflags = oflags & ~(O_CREAT | O_EXCL);
904 ad_meta_fileno(ad) = open(ad_p, nocreatflags);
906 if (ad_meta_fileno(ad) != -1) {
907 ad->ad_mdp->adf_flags = nocreatflags;
913 if ((adflags & ADFLAGS_RDONLY) && (adflags & ADFLAGS_SETSHRMD)) {
914 nocreatflags &= ~O_RDWR;
915 nocreatflags |= O_RDONLY;
916 EC_NEG1( ad_meta_fileno(ad) = open(ad_p, nocreatflags) );
917 ad->ad_mdp->adf_flags = nocreatflags;
922 if (!(oflags & O_CREAT))
925 * We're expecting to create a new adouble header file here
927 LOG(log_debug, logtype_default, "ad_open(\"%s\"): creating adouble file",
931 st_invalid = ad_mode_st(ad_p, &admode, &st_dir);
932 if ((ad->ad_options & ADVOL_UNIXPRIV))
934 admode = ad_hf_mode(admode);
935 if (errno == ENOENT) {
936 EC_NEG1_LOG( ad->ad_ops->ad_mkrf(ad_p) );
938 st_invalid = ad_mode_st(ad_p, &admode, &st_dir);
939 if ((ad->ad_options & ADVOL_UNIXPRIV))
941 admode = ad_hf_mode(admode);
944 /* retry with O_CREAT */
945 EC_NEG1( ad_meta_fileno(ad) = open(ad_p, oflags, admode) );
946 ad->ad_mdp->adf_flags = oflags;
947 /* just created, set owner if admin owner (root) */
949 ad_chown(ad_p, &st_dir);
956 /* Now we've got a new opened fd, we need to check that in the error case */
959 if (!(ad->ad_mdp->adf_flags & O_CREAT)) {
960 /* check for 0 length files, treat them as new. */
961 if (fstat(ad->ad_mdp->adf_fd, &st_meta) == 0) {
962 if (st_meta.st_size == 0)
963 ad->ad_mdp->adf_flags |= O_TRUNC;
965 /* we have valid data in st_meta stat structure, reused it in ad_header_read */
970 adf_lock_init(ad->ad_mdp);
971 ad->ad_mdp->adf_refcount = 1;
973 if ((ad->ad_mdp->adf_flags & ( O_TRUNC | O_CREAT ))) {
974 /* This is a new adouble header file, create it */
975 EC_NEG1_LOG( new_ad_header(ad, path, pst, adflags) );
978 /* Read the adouble header in and parse it.*/
979 EC_NEG1_LOG( ad->ad_ops->ad_header_read(path, ad, pst) );
983 if (ret != 0 && opened && ad_meta_fileno(ad) != -1) {
984 close(ad_meta_fileno(ad));
985 ad_meta_fileno(ad) = -1;
986 ad->ad_mdp->adf_refcount = 0;
988 LOG(log_debug, logtype_default,
989 "ad_open_hf_v2(\"%s\", %s): END: %d [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
990 fullpathname(path), adflags2logstr(adflags), ret,
991 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
992 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
993 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
997 static int ad_open_hf_ea(const char *path, int adflags, int mode, struct adouble *ad)
1004 LOG(log_debug, logtype_default,
1005 "ad_open_hf_ea(\"%s\", %s): BEGIN [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1006 fullpathname(path), adflags2logstr(adflags),
1007 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1008 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1009 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1011 oflags = O_NOFOLLOW | (ad2openflags(ad, ADFLAGS_DF, adflags) & ~(O_CREAT | O_TRUNC));
1013 if (ad_meta_fileno(ad) == -2)
1017 if (ad_meta_fileno(ad) != -1) {
1018 /* the file is already open, but we want write access: */
1019 if ((oflags & O_RDWR) &&
1020 /* and it was already denied: */
1021 (ad->ad_mdp->adf_flags & O_RDONLY)) {
1022 LOG(log_error, logtype_default, "ad_open_hf_ea(%s): rw request for ro file: %s",
1023 fullpathname(path), strerror(errno));
1027 /* it's not new anymore */
1028 ad->ad_mdp->adf_flags &= ~( O_TRUNC | O_CREAT );
1030 if (oflags & O_RDWR) {
1031 /* Fo a RDONLY adouble we just use sys_lgetxattr instead if sys_fgetxattr */
1032 if (adflags & ADFLAGS_DIR)
1033 /* For directories we open the directory RDONYL so we can later fchdir() */
1034 oflags = (oflags & ~O_RDWR) | O_RDONLY;
1035 LOG(log_debug, logtype_default, "ad_open_hf_ea(\"%s\"): opening base file for meta adouble EA", path);
1036 EC_NEG1(ad_meta_fileno(ad) = open(path, oflags));
1038 ad->ad_mdp->adf_flags = oflags;
1042 /* Read the adouble header in and parse it.*/
1043 if (ad->ad_ops->ad_header_read(path, ad, NULL) != 0) {
1044 if (!(adflags & ADFLAGS_CREATE)) {
1045 LOG(log_debug, logtype_default, "ad_open_hf_ea(\"%s\"): can't read metadata EA", path);
1050 LOG(log_debug, logtype_default, "ad_open_hf_ea(\"%s\"): creating metadata EA", path);
1052 /* It doesnt exist, EPERM or another error */
1053 if (!(errno == ENOATTR || errno == ENOENT)) {
1054 LOG(log_error, logtype_default, "ad_open_hf_ea: unexpected: %s", strerror(errno));
1059 EC_NEG1_LOG(new_ad_header(ad, path, NULL, adflags));
1060 ad->ad_mdp->adf_flags |= O_CREAT; /* mark as just created */
1062 LOG(log_debug, logtype_default, "ad_open_hf_ea(\"%s\"): created metadata EA", path);
1065 ad->ad_mdp->adf_refcount++;
1066 (void)ad_reso_size(path, adflags, ad);
1069 if (ret != 0 && opened && ad_meta_fileno(ad) != -1) {
1070 close(ad_meta_fileno(ad));
1071 ad_meta_fileno(ad) = -1;
1072 ad->ad_mdp->adf_refcount = 0;
1074 LOG(log_debug, logtype_default,
1075 "ad_open_hf_ea(\"%s\", %s): END: %d [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1076 fullpathname(path), adflags2logstr(adflags), ret,
1077 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1078 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1079 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1084 static int ad_open_hf(const char *path, int adflags, int mode, struct adouble *ad)
1088 memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
1091 switch (ad->ad_vers) {
1093 ret = ad_open_hf_v2(path, adflags, mode, ad);
1096 ret = ad_open_hf_ea(path, adflags, mode, ad);
1104 ret = ad_error(ad, adflags);
1110 * Get resofork length for adouble:ea
1112 static int ad_reso_size(const char *path, int adflags, struct adouble *ad)
1117 LOG(log_debug, logtype_default, "ad_reso_size(\"%s\")", path);
1122 if (ad_reso_fileno(ad) != -1) {
1123 EC_NEG1( fstat(ad_reso_fileno(ad), &st) );
1124 ad->ad_rlen = st.st_size;
1125 } else if (ad_meta_fileno(ad) != -1) {
1126 EC_NEG1( easz = sys_fgetxattr(ad_meta_fileno(ad), AD_EA_RESO, NULL, 0) );
1134 EC_NULL_LOG( rfpath = ad->ad_ops->ad_path(path, adflags));
1135 EC_ZERO( lstat(rfpath, &st));
1136 if (st.st_size > ADEDOFF_RFORK_OSX)
1137 ad->ad_rlen = st.st_size - ADEDOFF_RFORK_OSX;
1142 LOG(log_debug, logtype_default, "ad_reso_size(\"%s\"): size: %zd", path, ad->ad_rlen);
1151 * Open ressource fork
1153 * Only for adouble:ea, a nullop otherwise because adouble:v2 has the ressource fork as part
1154 * of the adouble file which is openend by ADFLAGS_HF.
1156 static int ad_open_rf(const char *path, int adflags, int mode, struct adouble *ad)
1161 int closeflags = adflags & (ADFLAGS_DF | ADFLAGS_HF);
1168 if (ad->ad_vers != AD_VERSION_EA)
1171 LOG(log_debug, logtype_default, "ad_open_rf(\"%s\"): BEGIN", fullpathname(path));
1173 oflags = O_NOFOLLOW | (ad2openflags(ad, ADFLAGS_RF, adflags) & ~O_CREAT);
1175 if (ad_reso_fileno(ad) != -1) {
1176 /* the file is already open, but we want write access: */
1177 if ((oflags & O_RDWR)
1178 /* and it was already denied: */
1179 && (ad->ad_rfp->adf_flags & O_RDONLY)) {
1183 ad->ad_rfp->adf_flags &= ~( O_TRUNC | O_CREAT );
1184 ad->ad_rfp->adf_refcount++;
1185 EC_NEG1_LOG( ad_reso_size(path, adflags, ad));
1189 if (ad_meta_fileno(ad) == -1)
1191 if ((ad_reso_fileno(ad) = sys_getxattrfd(ad_meta_fileno(ad), AD_EA_RESO, oflags)) == -1) {
1192 if (!(adflags & ADFLAGS_CREATE)) {
1197 EC_NEG1_LOG( ad_reso_fileno(ad) = sys_getxattrfd(ad_meta_fileno(ad),
1198 AD_EA_RESO, oflags, 0666) );
1201 EC_NULL_LOG( rfpath = ad->ad_ops->ad_path(path, adflags) );
1202 if ((ad_reso_fileno(ad) = open(rfpath, oflags)) == -1) {
1203 if (!(adflags & ADFLAGS_CREATE))
1206 EC_NEG1_LOG( ad_reso_fileno(ad) = open(rfpath, oflags, mode) );
1207 LOG(log_debug, logtype_default, "ad_open_rf(\"%s\"): created adouble rfork: \"%s\"",
1212 ad->ad_rfp->adf_refcount = 1;
1213 ad->ad_rfp->adf_flags = oflags;
1216 EC_ZERO_LOG( fstat(ad_reso_fileno(ad), &st) );
1217 if (ad->ad_rfp->adf_flags & O_CREAT) {
1218 /* This is a new adouble header file, create it */
1219 LOG(log_debug, logtype_default, "ad_open_rf(\"%s\"): created adouble rfork, initializing: \"%s\"",
1221 LOG(log_debug, logtype_default, "ad_open_rf(\"%s\"): created adouble rfork, flushing: \"%s\"",
1225 /* Read the adouble header */
1226 LOG(log_debug, logtype_default, "ad_open_rf(\"%s\"): reading adouble rfork: \"%s\"",
1228 EC_NEG1_LOG( ad_header_read_osx(NULL, ad, &st) );
1232 (void)ad_reso_size(path, adflags, ad);
1236 if (opened && (ad_reso_fileno(ad) != -1)) {
1237 close(ad_reso_fileno(ad));
1238 ad_reso_fileno(ad) = -1;
1239 ad->ad_rfp->adf_refcount = 0;
1241 if (adflags & ADFLAGS_NORF) {
1245 (void)ad_close(ad, closeflags);
1251 LOG(log_debug, logtype_default, "ad_open_rf(\"%s\"): END: %d", fullpathname(path), ret);
1256 /***********************************************************************************
1258 ********************************************************************************* */
1260 off_t ad_getentryoff(const struct adouble *ad, int eid)
1262 if (ad->ad_vers == AD_VERSION2)
1263 return ad->ad_eid[eid].ade_off;
1272 return ADEDOFF_RFORK_OSX;
1275 return ad->ad_eid[eid].ade_off;
1278 AFP_PANIC("What am I doing here?");
1281 const char *ad_path_ea( const char *path, int adflags _U_)
1286 const char *ad_path_osx(const char *path, int adflags _U_)
1288 static char pathbuf[ MAXPATHLEN + 1];
1289 char c, *slash, buf[MAXPATHLEN + 1];
1291 if (!strcmp(path,".")) {
1293 getcwd(buf, MAXPATHLEN);
1296 strlcpy(buf, path, MAXPATHLEN +1);
1298 if (NULL != ( slash = strrchr( buf, '/' )) ) {
1301 strlcpy( pathbuf, buf, MAXPATHLEN +1);
1304 pathbuf[ 0 ] = '\0';
1307 strlcat( pathbuf, "._", MAXPATHLEN +1);
1308 strlcat( pathbuf, slash, MAXPATHLEN +1);
1313 * Put the .AppleDouble where it needs to be:
1315 * / a/.AppleDouble/b
1317 * \ b/.AppleDouble/.Parent
1319 * FIXME: should do something for pathname > MAXPATHLEN
1321 const char *ad_path( const char *path, int adflags)
1323 static char pathbuf[ MAXPATHLEN + 1];
1327 if ( adflags & ADFLAGS_DIR ) {
1328 l = strlcpy( pathbuf, path, sizeof(pathbuf));
1330 if ( l && l < MAXPATHLEN) {
1333 strlcpy(pathbuf +l, ".AppleDouble/.Parent", sizeof(pathbuf) -l);
1335 if (NULL != ( slash = strrchr( path, '/' )) ) {
1338 /* XXX we must return NULL here and test in the caller */
1341 memcpy( pathbuf, path, l);
1346 l += strlcpy( pathbuf +l, ".AppleDouble/", sizeof(pathbuf) -l);
1347 strlcpy( pathbuf + l, slash, sizeof(pathbuf) -l);
1353 /* -------------------------
1354 * Support inherited protection modes for AppleDouble files. The supplied
1355 * mode is ANDed with the parent directory's mask value in lieu of "umask",
1356 * and that value is returned.
1358 char *ad_dir(const char *path)
1360 static char modebuf[ MAXPATHLEN + 1];
1363 * For a path with directories in it, remove the final component
1364 * (path or subdirectory name) to get the name we want to stat.
1365 * For a path which is just a filename, use "." instead.
1367 slash = strrchr( path, '/' );
1372 if (len >= MAXPATHLEN) {
1373 errno = ENAMETOOLONG;
1374 return NULL; /* can't do it */
1376 memcpy( modebuf, path, len );
1377 modebuf[len] = '\0';
1378 /* is last char a '/' ? */
1379 if (slash[1] == 0) {
1380 slash = modebuf+ len;
1382 while (modebuf < slash && slash[-1] == '/') {
1385 if (modebuf == slash) {
1389 while (modebuf < slash && *slash != '/') {
1392 if (modebuf == slash) {
1395 *slash = '\0'; /* remove pathname component */
1400 modebuf[0] = '.'; /* use current directory */
1405 int ad_setfuid(const uid_t id)
1411 /* ---------------- */
1412 uid_t ad_getfuid(void)
1418 stat path parent directory
1420 int ad_stat(const char *path, struct stat *stbuf)
1427 return lstat( p, stbuf );
1431 return access right of path parent directory
1433 int ad_mode( const char *path, mode_t mode)
1436 ad_mode_st(path, &mode, &stbuf);
1441 * Use mkdir() with mode bits taken from ad_mode().
1443 int ad_mkdir( const char *path, mode_t mode)
1449 LOG(log_debug, logtype_default, "ad_mkdir(\"%s\", %04o) {cwd: \"%s\"}",
1450 path, mode, getcwdpath());
1452 st_invalid = ad_mode_st(path, &mode, &stbuf);
1453 ret = mkdir( path, mode );
1454 if (ret || st_invalid)
1456 ad_chown(path, &stbuf);
1461 static void ad_init_func(struct adouble *ad)
1463 switch (ad->ad_vers) {
1465 ad->ad_ops = &ad_adouble;
1466 ad->ad_rfp = &ad->ad_resource_fork;
1467 ad->ad_mdp = &ad->ad_resource_fork;
1470 ad->ad_ops = &ad_adouble_ea;
1471 ad->ad_rfp = &ad->ad_resource_fork;
1472 ad->ad_mdp = &ad->ad_data_fork;
1475 AFP_PANIC("ad_init: unknown AD version");
1479 ad_data_fileno(ad) = -1;
1480 ad_reso_fileno(ad) = -1;
1481 ad_meta_fileno(ad) = -1;
1482 ad->ad_refcount = 1;
1486 void ad_init_old(struct adouble *ad, int flags, int options)
1488 memset(ad, 0, sizeof(struct adouble));
1489 ad->ad_vers = flags;
1490 ad->ad_options = options;
1494 void ad_init(struct adouble *ad, const struct vol * restrict vol)
1496 memset(ad, 0, sizeof(struct adouble));
1497 ad->ad_vers = vol->v_adouble;
1498 ad->ad_options = vol->v_ad_options;
1503 * Open data-, metadata(header)- or ressource fork
1505 * ad_open(struct adouble *ad, const char *path, int adflags, int flags)
1506 * ad_open(struct adouble *ad, const char *path, int adflags, int flags, mode_t mode)
1508 * You must call ad_init() before ad_open, usually you'll just call it like this: \n
1511 * ad_init(&ad, vol->v_adouble, vol->v_ad_options);
1514 * Open a files data fork, metadata fork or ressource fork.
1516 * @param ad (rw) pointer to struct adouble
1517 * @param path (r) Path to file or directory
1518 * @param adflags (r) Flags specifying which fork to open, can be or'd:
1519 * ADFLAGS_DF: open data fork
1520 * ADFLAGS_RF: open ressource fork
1521 * ADFLAGS_HF: open header (metadata) file
1522 * ADFLAGS_NOHF: it's not an error if header file couldn't be opened
1523 * ADFLAGS_NORF: it's not an error if reso fork couldn't be opened
1524 * ADFLAGS_DIR: if path is a directory you MUST or ADFLAGS_DIR to adflags
1526 * Access mode for the forks:
1527 * ADFLAGS_RDONLY: open read only
1528 * ADFLAGS_RDWR: open read write
1531 * ADFLAGS_CREATE: create if not existing
1532 * ADFLAGS_TRUNC: truncate
1535 * ADFLAGS_CHECK_OF: check for open forks from us and other afpd's
1536 * ADFLAGS_SETSHRMD: this adouble struct will be used to set sharemode locks.
1537 * This basically results in the files being opened RW instead of RDONLY.
1538 * @param mode (r) mode used with O_CREATE
1540 * The open mode flags (rw vs ro) have to take into account all the following requirements:
1541 * - we remember open fds for files because me must avoid a single close releasing fcntl locks for other
1542 * fds of the same file
1544 * @returns 0 on success, any other value indicates an error
1546 int ad_open(struct adouble *ad, const char *path, int adflags, ...)
1552 LOG(log_debug, logtype_default,
1553 "ad_open(\"%s\", %s): BEGIN [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1554 fullpathname(path), adflags2logstr(adflags),
1555 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1556 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1557 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1559 if (adflags & ADFLAGS_CHECK_OF)
1560 /* Checking for open forks requires sharemode lock support (ie RDWR instead of RDONLY) */
1561 adflags |= ADFLAGS_SETSHRMD;
1563 if (ad->ad_vers == AD_VERSION2) {
1564 if (adflags & ADFLAGS_SETSHRMD)
1565 /* sharemode locks are stored in the data fork, adouble:v2 needs this extra handling here */
1566 adflags |= ADFLAGS_DF;
1567 if (adflags & ADFLAGS_RF)
1568 adflags |= ADFLAGS_HF;
1569 if (adflags & ADFLAGS_NORF)
1570 adflags |= ADFLAGS_NOHF;
1573 if (ad->ad_inited != AD_INITED) {
1574 ad->ad_adflags = adflags;
1575 ad->ad_inited = AD_INITED;
1577 ad->ad_open_forks = ((ad->ad_data_fork.adf_refcount > 0) ? ATTRBIT_DOPEN : 0);
1578 if (ad->ad_resource_fork.adf_refcount > 0)
1579 ad->ad_open_forks |= ATTRBIT_ROPEN;
1582 va_start(args, adflags);
1583 if (adflags & ADFLAGS_CREATE)
1584 mode = va_arg(args, mode_t);
1587 if (adflags & ADFLAGS_DF) {
1588 EC_ZERO( ad_open_df(path, adflags, mode, ad) );
1591 if (adflags & ADFLAGS_HF) {
1592 EC_ZERO( ad_open_hf(path, adflags, mode, ad) );
1595 if (adflags & ADFLAGS_RF) {
1596 EC_ZERO( ad_open_rf(path, adflags, mode, ad) );
1599 if (adflags & ADFLAGS_CHECK_OF) {
1600 ad->ad_open_forks |= ad_openforks(ad, ad->ad_open_forks);
1604 LOG(log_debug, logtype_default,
1605 "ad_open(\"%s\"): END: %d [dfd: %d (ref: %d), mfd: %d (ref: %d), rfd: %d (ref: %d)]",
1606 fullpathname(path), ret,
1607 ad_data_fileno(ad), ad->ad_data_fork.adf_refcount,
1608 ad_meta_fileno(ad), ad->ad_mdp->adf_refcount,
1609 ad_reso_fileno(ad), ad->ad_rfp->adf_refcount);
1615 * @brief open metadata, possibly as root
1617 * Return only metadata but try very hard ie at first try as user, then try as root.
1619 * @param name name of file/dir
1620 * @param flags ADFLAGS_DIR: name is a directory \n
1621 * ADFLAGS_CHECK_OF: test if name is open by us or another afpd process
1623 * @param adp pointer to struct adouble
1625 int ad_metadata(const char *name, int flags, struct adouble *adp)
1628 int ret, err, oflags;
1630 /* Sanitize flags */
1631 oflags = (flags & (ADFLAGS_CHECK_OF | ADFLAGS_DIR)) | ADFLAGS_HF | ADFLAGS_RDONLY;
1633 if ((ret = ad_open(adp, name, oflags)) < 0 && errno == EACCES) {
1636 LOG(log_error, logtype_default, "ad_metadata(%s): seteuid failed %s", name, strerror(errno));
1640 /* we are root open read only */
1641 ret = ad_open(adp, name, oflags);
1643 if ( seteuid(uid) < 0) {
1644 LOG(log_error, logtype_default, "ad_metadata: can't seteuid back");
1654 * @brief openat like wrapper for ad_metadata
1656 int ad_metadataat(int dirfd, const char *name, int flags, struct adouble *adp)
1662 if ((cwdfd = open(".", O_RDONLY) == -1) || (fchdir(dirfd) != 0)) {
1668 if (ad_metadata(name, flags, adp) < 0) {
1675 if (fchdir(cwdfd) != 0) {
1676 LOG(log_error, logtype_afpd, "ad_openat: cant chdir back, exiting");
1689 int ad_refresh(const char *path, struct adouble *ad)
1691 switch (ad->ad_vers) {
1693 if (ad_meta_fileno(ad) == -1)
1695 return ad->ad_ops->ad_header_read(NULL, ad, NULL);
1699 if (AD_META_OPEN(ad)) {
1700 if (ad_data_fileno(ad) == -1)
1702 // TODO: read meta EA
1705 if (AD_RSRC_OPEN(ad)) {
1706 if (ad_reso_fileno(ad) == -1)
1709 if (fstat(ad_reso_fileno(ad), &st) == -1)
1711 ad->ad_rlen = st.st_size;
1714 if (AD_META_OPEN(ad)) {
1715 if (ad_data_fileno(ad) == -1)
1717 // TODO: read meta EA
1719 if (AD_RSRC_OPEN(ad)) {
1720 if (ad_reso_fileno(ad) == -1)
1722 if (ad_header_read_osx(path, ad, NULL) < 0)
1726 return ad->ad_ops->ad_header_read(path, ad, NULL);
1735 int ad_openat(struct adouble *ad,
1736 int dirfd, /* dir fd openat like */
1746 if ((cwdfd = open(".", O_RDONLY) == -1) || (fchdir(dirfd) != 0))
1750 va_start(args, adflags);
1751 if (adflags & ADFLAGS_CREATE)
1752 mode = va_arg(args, mode_t);
1755 EC_NEG1( ad_open(ad, path, adflags, mode) );
1758 if (fchdir(cwdfd) != 0) {
1759 AFP_PANIC("ad_openat: cant chdir back");