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>
57 #define MAX(a, b) ((a) < (b) ? (b) : (a))
60 #define ADEDOFF_MAGIC (0)
61 #define ADEDOFF_VERSION (ADEDOFF_MAGIC + ADEDLEN_MAGIC)
62 #define ADEDOFF_FILLER (ADEDOFF_VERSION + ADEDLEN_VERSION)
63 #define ADEDOFF_NENTRIES (ADEDOFF_FILLER + ADEDLEN_FILLER)
65 /* initial lengths of some of the fields */
66 #define ADEDLEN_INIT 0
68 /* i stick things in a slightly different order than their eid order in
69 * case i ever want to separate RootInfo behaviour from the rest of the
73 #define ADEDOFF_NAME_V2 (AD_HEADER_LEN + ADEID_NUM_V2*AD_ENTRY_LEN)
74 #define ADEDOFF_COMMENT_V2 (ADEDOFF_NAME_V2 + ADEDLEN_NAME)
75 #define ADEDOFF_FILEDATESI (ADEDOFF_COMMENT_V2 + ADEDLEN_COMMENT)
76 #define ADEDOFF_FINDERI_V2 (ADEDOFF_FILEDATESI + ADEDLEN_FILEDATESI)
77 #define ADEDOFF_DID (ADEDOFF_FINDERI_V2 + ADEDLEN_FINDERI)
78 #define ADEDOFF_AFPFILEI (ADEDOFF_DID + ADEDLEN_DID)
79 #define ADEDOFF_SHORTNAME (ADEDOFF_AFPFILEI + ADEDLEN_AFPFILEI)
80 #define ADEDOFF_PRODOSFILEI (ADEDOFF_SHORTNAME + ADEDLEN_SHORTNAME)
81 #define ADEDOFF_PRIVDEV (ADEDOFF_PRODOSFILEI + ADEDLEN_PRODOSFILEI)
82 #define ADEDOFF_PRIVINO (ADEDOFF_PRIVDEV + ADEDLEN_PRIVDEV)
83 #define ADEDOFF_PRIVSYN (ADEDOFF_PRIVINO + ADEDLEN_PRIVINO)
84 #define ADEDOFF_PRIVID (ADEDOFF_PRIVSYN + ADEDLEN_PRIVSYN)
85 #define ADEDOFF_RFORK_V2 (ADEDOFF_PRIVID + ADEDLEN_PRIVID)
88 #define ADEDOFF_FINDERI_EA (AD_HEADER_LEN + ADEID_NUM_EA * AD_ENTRY_LEN)
89 #define ADEDOFF_COMMENT_EA (ADEDOFF_FINDERI_EA + ADEDLEN_FINDERI)
90 #define ADEDOFF_FILEDATESI_EA (ADEDOFF_COMMENT_EA + ADEDLEN_COMMENT)
91 #define ADEDOFF_AFPFILEI_EA (ADEDOFF_FILEDATESI_EA + ADEDLEN_FILEDATESI)
93 /* this is to prevent changing timezones from causing problems with
94 localtime volumes. the screw-up is 30 years. we use a delta of 5 years */
95 #define TIMEWARP_DELTA 157680000
98 uint32_t id, offset, len;
101 /* --------------------------- */
102 static uid_t default_uid = -1;
104 /* Forward declarations */
105 static int ad_mkrf(const char *path);
106 static int ad_header_read(struct adouble *ad, struct stat *hst);
107 static int ad_header_upgrade(struct adouble *ad, const char *name);
109 static int ad_mkrf_ea(const char *path);
110 static int ad_header_read_ea(struct adouble *ad, struct stat *hst);
111 static int ad_header_upgrade_ea(struct adouble *ad, const char *name);
113 static struct adouble_fops ad_adouble = {
116 &ad_rebuild_adouble_header,
121 static struct adouble_fops ad_adouble_ea = {
124 &ad_rebuild_adouble_header,
126 &ad_header_upgrade_ea,
129 static const struct entry entry_order2[ADEID_NUM_V2 + 1] = {
130 {ADEID_NAME, ADEDOFF_NAME_V2, ADEDLEN_INIT},
131 {ADEID_COMMENT, ADEDOFF_COMMENT_V2, ADEDLEN_INIT},
132 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI, ADEDLEN_FILEDATESI},
133 {ADEID_FINDERI, ADEDOFF_FINDERI_V2, ADEDLEN_FINDERI},
134 {ADEID_DID, ADEDOFF_DID, ADEDLEN_DID},
135 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI, ADEDLEN_AFPFILEI},
136 {ADEID_SHORTNAME, ADEDOFF_SHORTNAME, ADEDLEN_INIT},
137 {ADEID_PRODOSFILEI, ADEDOFF_PRODOSFILEI, ADEDLEN_PRODOSFILEI},
138 {ADEID_PRIVDEV, ADEDOFF_PRIVDEV, ADEDLEN_INIT},
139 {ADEID_PRIVINO, ADEDOFF_PRIVINO, ADEDLEN_INIT},
140 {ADEID_PRIVSYN, ADEDOFF_PRIVSYN, ADEDLEN_INIT},
141 {ADEID_PRIVID, ADEDOFF_PRIVID, ADEDLEN_INIT},
142 {ADEID_RFORK, ADEDOFF_RFORK_V2, ADEDLEN_INIT},
146 /* Using Extended Attributes */
147 static const struct entry entry_order_ea[ADEID_NUM_EA + 1] = {
148 {ADEID_FINDERI, ADEDOFF_FINDERI_EA, ADEDLEN_FINDERI},
149 {ADEID_COMMENT, ADEDOFF_COMMENT_EA, ADEDLEN_INIT},
150 {ADEID_FILEDATESI, ADEDOFF_FILEDATESI_EA, ADEDLEN_FILEDATESI},
151 {ADEID_AFPFILEI, ADEDOFF_AFPFILEI_EA, ADEDLEN_AFPFILEI},
155 const char *adflags2logstr(int adflags)
162 if (adflags & ADFLAGS_DF) {
163 strlcat(buf, "DF", 64);
166 if (adflags & ADFLAGS_RF) {
168 strlcat(buf, "|", 64);
169 strlcat(buf, "RF", 64);
172 if (adflags & ADFLAGS_HF) {
174 strlcat(buf, "|", 64);
175 strlcat(buf, "HF", 64);
178 if (adflags & ADFLAGS_NOHF) {
180 strlcat(buf, "|", 64);
181 strlcat(buf, "NOHF", 64);
184 if (adflags & ADFLAGS_DIR) {
186 strlcat(buf, "|", 64);
187 strlcat(buf, "DIR", 64);
190 if (adflags & ADFLAGS_CHECK_OF) {
192 strlcat(buf, "|", 64);
193 strlcat(buf, "OF", 64);
199 static uint32_t get_eid(uint32_t eid)
204 return ADEID_PRIVDEV;
206 return ADEID_PRIVINO;
208 return ADEID_PRIVSYN;
215 /* ----------------------------------- */
216 static int new_ad_header(const char *path, struct adouble *ad, int adflags)
218 const struct entry *eid;
222 ad->ad_magic = AD_MAGIC;
223 ad->ad_version = ad->ad_flags & 0x0f0000;
224 if (!ad->ad_version) {
225 ad->ad_version = AD_VERSION;
229 memset(ad->ad_data, 0, sizeof(ad->ad_data));
231 if (ad->ad_flags == AD_VERSION2)
233 else if (ad->ad_flags == AD_VERSION_EA)
234 eid = entry_order_ea;
240 ad->ad_eid[eid->id].ade_off = eid->offset;
241 ad->ad_eid[eid->id].ade_len = eid->len;
245 /* put something sane in the directory finderinfo */
246 if ((adflags & ADFLAGS_DIR)) {
247 /* set default view */
248 ashort = htons(FINDERINFO_CLOSEDVIEW);
249 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRVIEWOFF, &ashort, sizeof(ashort));
251 /* set default creator/type fields */
252 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRTYPEOFF,"\0\0\0\0", 4);
253 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRCREATOFF,"\0\0\0\0", 4);
256 /* make things invisible */
257 if ((ad->ad_options & ADVOL_INVDOTS) && (*path == '.')) {
258 ashort = htons(ATTRBIT_INVISIBLE);
259 ad_setattr(ad, ashort);
260 ashort = htons(FINDERINFO_INVISIBLE);
261 memcpy(ad_entry(ad, ADEID_FINDERI) + FINDERINFO_FRFLAGOFF, &ashort, sizeof(ashort));
264 if (lstat(path, &st) < 0)
267 /* put something sane in the date fields */
268 ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX, st.st_mtime);
269 ad_setdate(ad, AD_DATE_MODIFY | AD_DATE_UNIX, st.st_mtime);
270 ad_setdate(ad, AD_DATE_ACCESS | AD_DATE_UNIX, st.st_mtime);
271 ad_setdate(ad, AD_DATE_BACKUP, AD_DATE_START);
275 /* -------------------------------------
278 static void parse_entries(struct adouble *ad, char *buf, uint16_t nentries)
280 uint32_t eid, len, off;
283 /* now, read in the entry bits */
284 for (; nentries > 0; nentries-- ) {
285 memcpy(&eid, buf, sizeof( eid ));
286 eid = get_eid(ntohl(eid));
287 buf += sizeof( eid );
288 memcpy(&off, buf, sizeof( off ));
290 buf += sizeof( off );
291 memcpy(&len, buf, sizeof( len ));
293 buf += sizeof( len );
295 if (eid && eid < ADEID_MAX && off < sizeof(ad->ad_data) &&
296 (off + len <= sizeof(ad->ad_data) || eid == ADEID_RFORK)) {
297 ad->ad_eid[ eid ].ade_off = off;
298 ad->ad_eid[ eid ].ade_len = len;
299 } else if (!warning) {
301 LOG(log_warning, logtype_default, "parse_entries: bogus eid: %d", eid);
306 /* this reads enough of the header so that we can figure out all of
307 * the entry lengths and offsets. once that's done, we just read/mmap
308 * the rest of the header in.
310 * NOTE: we're assuming that the resource fork is kept at the end of
311 * the file. also, mmapping won't work for the hfs fs until it
312 * understands how to mmap header files. */
313 static int ad_header_read(struct adouble *ad, struct stat *hst)
315 char *buf = ad->ad_data;
321 /* read the header */
322 if ((header_len = adf_pread( ad->ad_mdp, buf, sizeof(ad->ad_data), 0)) < 0) {
325 if (header_len < AD_HEADER_LEN) {
330 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
331 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
332 ad->ad_magic = ntohl( ad->ad_magic );
333 ad->ad_version = ntohl( ad->ad_version );
335 if ((ad->ad_magic != AD_MAGIC) || (ad->ad_version != AD_VERSION2)) {
336 LOG(log_error, logtype_default, "ad_open: can't parse AppleDouble header.");
341 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
342 nentries = ntohs( nentries );
344 /* read in all the entry headers. if we have more than the
345 * maximum, just hope that the rfork is specified early on. */
346 len = nentries*AD_ENTRY_LEN;
348 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
349 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
351 buf += AD_HEADER_LEN;
352 if (len > header_len - AD_HEADER_LEN) {
353 LOG(log_error, logtype_default, "ad_header_read: can't read entry info.");
358 /* figure out all of the entry offsets and lengths. if we aren't
359 * able to read a resource fork entry, bail. */
360 nentries = len / AD_ENTRY_LEN;
361 parse_entries(ad, buf, nentries);
362 if (!ad_getentryoff(ad, ADEID_RFORK)
363 || (ad_getentryoff(ad, ADEID_RFORK) > sizeof(ad->ad_data))
365 LOG(log_error, logtype_default, "ad_header_read: problem with rfork entry offset.");
370 if (ad_getentryoff(ad, ADEID_RFORK) > header_len) {
371 LOG(log_error, logtype_default, "ad_header_read: can't read in entries.");
378 if (fstat(ad->ad_mdp->adf_fd, &st) < 0) {
379 return 1; /* fail silently */
383 ad->ad_rlen = hst->st_size - ad_getentryoff(ad, ADEID_RFORK);
388 static int ad_header_read_ea(struct adouble *ad, struct stat *hst _U_)
393 char *buf = ad->ad_data;
395 /* read the header */
396 if ((header_len = sys_fgetxattr(ad_data_fileno(ad), AD_EA_META, ad->ad_data, AD_DATASZ_EA)) < 1) {
397 LOG(log_debug, logtype_default, "ad_header_read_ea: %s (%u)", strerror(errno), errno);
401 if (header_len < AD_HEADER_LEN) {
402 LOG(log_error, logtype_default, "ad_header_read_ea: bogus AppleDouble header.");
407 memcpy(&ad->ad_magic, buf, sizeof( ad->ad_magic ));
408 memcpy(&ad->ad_version, buf + ADEDOFF_VERSION, sizeof( ad->ad_version ));
410 ad->ad_magic = ntohl( ad->ad_magic );
411 ad->ad_version = ntohl( ad->ad_version );
413 if ((ad->ad_magic != AD_MAGIC) || (ad->ad_version != AD_VERSION2)) {
414 LOG(log_error, logtype_default, "ad_header_read_ea: wrong magic or version");
419 memcpy(&nentries, buf + ADEDOFF_NENTRIES, sizeof( nentries ));
420 nentries = ntohs( nentries );
422 /* Protect against bogus nentries */
423 len = nentries * AD_ENTRY_LEN;
424 if (len + AD_HEADER_LEN > sizeof(ad->ad_data))
425 len = sizeof(ad->ad_data) - AD_HEADER_LEN;
426 if (len > header_len - AD_HEADER_LEN) {
427 LOG(log_error, logtype_default, "ad_header_read_ea: can't read entry info.");
431 nentries = len / AD_ENTRY_LEN;
433 /* Now parse entries */
434 parse_entries(ad, buf + AD_HEADER_LEN, nentries);
438 static int ad_mkrf(const char *path)
442 * Probably .AppleDouble doesn't exist, try to mkdir it.
444 if (NULL == ( slash = strrchr( path, '/' )) ) {
449 if ( ad_mkdir( path, 0777 ) < 0 ) {
456 static int ad_mkrf_ea(const char *path _U_)
458 AFP_PANIC("ad_mkrf_ea: dont use");
463 if we are root change path user/ group
464 It can be a native function for BSD cf. FAQ.Q10
465 path: pathname to chown
466 stbuf: parent directory inode
468 use fstat and fchown or lchown with linux?
470 #define EMULATE_SUIDDIR
472 static int ad_chown(const char *path, struct stat *stbuf)
475 #ifdef EMULATE_SUIDDIR
478 if (default_uid != (uid_t)-1) {
479 /* we are root (admin) */
480 id = (default_uid)?default_uid:stbuf->st_uid;
481 ret = lchown( path, id, stbuf->st_gid );
487 #define DEFMASK 07700 /* be conservative */
490 return access right and inode of path parent directory
492 static int ad_mode_st(const char *path, int *mode, struct stat *stbuf)
497 if (ad_stat(path, stbuf) != 0) {
501 *mode &= stbuf->st_mode;
505 /* --------------------------- */
506 static int ad_header_upgrade(struct adouble *ad _U_, const char *name _U_)
511 static int ad_header_upgrade_ea(struct adouble *ad _U_, const char *name _U_)
513 AFP_PANIC("ad_header_upgrade_ea: dont use");
518 * Error handling for adouble header(=metadata) file open error
520 * We're called because opening ADFLAGS_HF caused an error.
521 * 1. In case ad_open is called with ADFLAGS_NOHF the error is suppressed.
522 * 2. If ad_open was called with ADFLAGS_DF we may have opened the datafork and thus
523 * ought to close it before returning with an error condition.
525 static int ad_error(struct adouble *ad, int adflags)
528 if ((adflags & ADFLAGS_NOHF)) { /* 1 */
529 /* FIXME double check : set header offset ?*/
532 if ((adflags & ADFLAGS_DF)) { /* 2 */
533 ad_close( ad, ADFLAGS_DF );
539 /* Map ADFLAGS to open() flags */
540 static int ad2openflags(int adflags)
544 if (adflags & ADFLAGS_RDWR)
546 if (adflags & ADFLAGS_RDONLY)
548 if (adflags & ADFLAGS_CREATE)
550 if (adflags & ADFLAGS_EXCL)
552 if (adflags & ADFLAGS_TRUNC)
558 static int ad_open_df(const char *path, int adflags, mode_t mode, struct adouble *ad)
566 LOG(log_debug, logtype_default, "ad_open_df(\"%s\", %s, %04o)",
567 fullpathname(path), mode);
570 if (ad_data_fileno(ad) != -1) {
571 /* the file is already open, but we want write access: */
572 if ((adflags & ADFLAGS_RDWR)
573 /* and it was denied the first time: */
574 && (ad->ad_data_fork.adf_flags & O_RDONLY)) {
578 /* it's not new anymore */
579 ad->ad_mdp->adf_flags &= ~( O_TRUNC | O_CREAT );
580 ad->ad_data_fork.adf_refcount++;
584 oflags = O_NOFOLLOW | ad2openflags(adflags);
587 if ((adflags & ADFLAGS_CREATE)) {
588 st_invalid = ad_mode_st(path, &admode, &st_dir);
589 if ((ad->ad_options & ADVOL_UNIXPRIV))
593 ad->ad_data_fork.adf_fd = open(path, oflags, admode);
595 if (ad->ad_data_fork.adf_fd == -1) {
596 if (errno != OPEN_NOFOLLOW_ERRNO)
599 ad->ad_data_fork.adf_syml = malloc(MAXPATHLEN+1);
600 if ((lsz = readlink(path, ad->ad_data_fork.adf_syml, MAXPATHLEN)) <= 0) {
601 free(ad->ad_data_fork.adf_syml);
604 ad->ad_data_fork.adf_syml[lsz] = 0;
605 ad->ad_data_fork.adf_fd = -2; /* -2 means its a symlink */
609 ad_chown(path, &st_dir); /* just created, set owner if admin (root) */
611 ad->ad_data_fork.adf_flags = oflags;
612 adf_lock_init(&ad->ad_data_fork);
613 ad->ad_data_fork.adf_refcount++;
618 static int ad_open_hf_v2(const char *path, int adflags, mode_t mode, struct adouble *ad)
622 struct stat *pst = NULL;
624 int oflags, nocreatflags;
628 if (ad_meta_fileno(ad) != -1) {
629 /* the file is already open, but we want write access: */
630 if (!(adflags & ADFLAGS_RDONLY) &&
631 /* and it was already denied: */
632 !(ad->ad_mdp->adf_flags & O_RDWR)) {
637 /* it's not new anymore */
638 ad->ad_mdp->adf_flags &= ~( O_TRUNC | O_CREAT );
639 ad->ad_mdp->adf_refcount++;
643 ad_p = ad->ad_ops->ad_path(path, adflags);
644 oflags = O_NOFOLLOW | ad2openflags(adflags);
645 nocreatflags = oflags & ~(O_CREAT | O_EXCL);
646 ad->ad_mdp->adf_fd = open(ad_p, nocreatflags);
648 if ( ad->ad_mdp->adf_fd < 0 ) {
649 if (!(errno == ENOENT && (oflags & O_CREAT)))
650 return ad_error(ad, adflags);
652 * We're expecting to create a new adouble header file here
653 * if ((oflags & O_CREAT) ==> (oflags & O_RDWR)
655 LOG(log_debug, logtype_default, "ad_open(\"%s\"): creating adouble file",
659 st_invalid = ad_mode_st(ad_p, &admode, &st_dir);
660 if ((ad->ad_options & ADVOL_UNIXPRIV))
662 admode = ad_hf_mode(admode);
663 if (errno == ENOENT) {
664 if (ad->ad_ops->ad_mkrf( ad_p) < 0) {
665 return ad_error(ad, adflags);
668 st_invalid = ad_mode_st(ad_p, &admode, &st_dir);
669 if ((ad->ad_options & ADVOL_UNIXPRIV))
671 admode = ad_hf_mode(admode);
674 /* retry with O_CREAT */
675 ad->ad_mdp->adf_fd = open(ad_p, oflags, admode);
676 if ( ad->ad_mdp->adf_fd < 0 )
677 return ad_error(ad, adflags);
679 ad->ad_mdp->adf_flags = oflags;
680 /* just created, set owner if admin owner (root) */
682 ad_chown(ad_p, &st_dir);
684 ad->ad_mdp->adf_flags = nocreatflags;
685 if (fstat(ad->ad_mdp->adf_fd, &st_meta) == 0 && st_meta.st_size == 0) {
686 /* for 0 length files, treat them as new. */
687 ad->ad_mdp->adf_flags |= O_TRUNC;
689 /* we have valid data in st_meta stat structure, reused it in ad_header_read */
694 ad->ad_mdp->adf_refcount = 1;
695 adf_lock_init(ad->ad_mdp);
697 if ((ad->ad_mdp->adf_flags & ( O_TRUNC | O_CREAT ))) {
698 /* This is a new adouble header file, create it */
699 if (new_ad_header(path, ad, adflags) < 0) {
701 /* the file is already deleted, perm, whatever, so return an error */
702 ad_close(ad, adflags);
708 /* Read the adouble header in and parse it.*/
709 if (ad->ad_ops->ad_header_read( ad , pst) < 0
710 || ad->ad_ops->ad_header_upgrade(ad, ad_p) < 0) {
712 ad_close(ad, adflags);
721 static int ad_open_hf_ea(const char *path, int adflags, int mode, struct adouble *ad)
724 int oflags = O_NOFOLLOW;
726 oflags = ad2openflags(adflags) & ~(O_CREAT | O_TRUNC);
728 if (ad_meta_fileno(ad) == -1) {
729 if ((ad_meta_fileno(ad) = open(path, oflags)) == -1)
731 ad->ad_mdp->adf_flags = oflags;
732 ad->ad_mdp->adf_refcount = 1;
733 adf_lock_init(ad->ad_mdp);
736 /* Read the adouble header in and parse it.*/
737 if (ad->ad_ops->ad_header_read(ad, NULL) != 0) {
738 if (!(adflags & ADFLAGS_CREATE))
741 /* It doesnt exist, EPERM or another error */
742 if (!(errno == ENOATTR || errno == ENOENT)) {
743 LOG(log_error, logtype_default, "ad_open_hf_ea: unexpected: %s", strerror(errno));
748 if (new_ad_header(path, ad, adflags) < 0) {
749 LOG(log_error, logtype_default, "ad_open_hf_ea: can't create new header: %s",
753 ad->ad_mdp->adf_flags |= O_CREAT; /* mark as just created */
755 LOG(log_debug, logtype_default, "ad_open_hf_ea(\"%s\"): created metadata EA", path);
758 ad->ad_mdp->adf_refcount++;
760 if ((rforklen = sys_fgetxattr(ad_meta_fileno(ad), AD_EA_RESO, NULL, 0)) > 0)
761 ad->ad_rlen = rforklen;
766 if (ad_meta_fileno(ad) != -1) {
767 close(ad_meta_fileno(ad));
768 ad_meta_fileno(ad) = -1;
770 return ad_error(ad, adflags);
773 static int ad_open_hf(const char *path, int adflags, int mode, struct adouble *ad)
777 LOG(log_debug, logtype_default, "ad_open_hf(\"%s\", %04o)", path, mode);
779 memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
782 switch (ad->ad_flags) {
784 ret = ad_open_hf_v2(path, adflags, mode, ad);
787 ret = ad_open_hf_ea(path, adflags, mode, ad);
798 * Open ressource fork
800 * Only for adouble:ea, a nullop otherwise because adouble:v2 has the ressource fork as part
801 * of the adouble file which is openend by ADFLAGS_HF.
803 static int ad_open_rf(const char *path, int adflags, int mode, struct adouble *ad)
807 if (ad->ad_flags != AD_VERSION_EA)
810 LOG(log_debug, logtype_default, "ad_open_rf(\"%s\", %04o)",
813 if ((ad->ad_rlen = sys_fgetxattr(ad_meta_fileno(ad), AD_EA_RESO, NULL, 0)) <= 0) {
819 LOG(log_warning, logtype_default, "ad_open_rf(\"%s\"): %s",
820 fullpathname(path), strerror(errno));
826 /* Round up and allocate buffer */
827 size_t roundup = ((ad->ad_rlen / RFORK_EA_ALLOCSIZE) + 1) * RFORK_EA_ALLOCSIZE;
828 if ((ad->ad_resforkbuf = malloc(roundup)) == NULL) {
833 ad->ad_resforkbufsize = roundup;
835 /* Read the EA into the buffer */
836 if (ad->ad_rlen > 0) {
837 if (sys_fgetxattr(ad_meta_fileno(ad), AD_EA_RESO, ad->ad_resforkbuf, ad->ad_rlen) == -1) {
845 free(ad->ad_resforkbuf);
846 ad->ad_resforkbuf = NULL;
848 ad->ad_resforkbufsize = 0;
854 /***********************************************************************************
856 ********************************************************************************* */
858 const char *ad_path_ea( const char *path, int adflags _U_)
864 * Put the .AppleDouble where it needs to be:
868 * \ b/.AppleDouble/.Parent
870 * FIXME: should do something for pathname > MAXPATHLEN
872 const char *ad_path( const char *path, int adflags)
874 static char pathbuf[ MAXPATHLEN + 1];
878 if ( adflags & ADFLAGS_DIR ) {
879 l = strlcpy( pathbuf, path, sizeof(pathbuf));
881 if ( l && l < MAXPATHLEN) {
884 strlcpy(pathbuf +l, ".AppleDouble/.Parent", sizeof(pathbuf) -l);
886 if (NULL != ( slash = strrchr( path, '/' )) ) {
889 /* XXX we must return NULL here and test in the caller */
892 memcpy( pathbuf, path, l);
897 l += strlcpy( pathbuf +l, ".AppleDouble/", sizeof(pathbuf) -l);
898 strlcpy( pathbuf + l, slash, sizeof(pathbuf) -l);
904 /* -------------------------
905 * Support inherited protection modes for AppleDouble files. The supplied
906 * mode is ANDed with the parent directory's mask value in lieu of "umask",
907 * and that value is returned.
909 char *ad_dir(const char *path)
911 static char modebuf[ MAXPATHLEN + 1];
914 * For a path with directories in it, remove the final component
915 * (path or subdirectory name) to get the name we want to stat.
916 * For a path which is just a filename, use "." instead.
918 slash = strrchr( path, '/' );
923 if (len >= MAXPATHLEN) {
924 errno = ENAMETOOLONG;
925 return NULL; /* can't do it */
927 memcpy( modebuf, path, len );
929 /* is last char a '/' ? */
931 slash = modebuf+ len;
933 while (modebuf < slash && slash[-1] == '/') {
936 if (modebuf == slash) {
940 while (modebuf < slash && *slash != '/') {
943 if (modebuf == slash) {
946 *slash = '\0'; /* remove pathname component */
951 modebuf[0] = '.'; /* use current directory */
956 int ad_setfuid(const uid_t id)
962 /* ---------------- */
963 uid_t ad_getfuid(void)
969 stat path parent directory
971 int ad_stat(const char *path, struct stat *stbuf)
978 return lstat( p, stbuf );
982 return access right of path parent directory
984 int ad_mode( const char *path, int mode)
987 ad_mode_st(path, &mode, &stbuf);
992 * Use mkdir() with mode bits taken from ad_mode().
994 int ad_mkdir( const char *path, int mode)
1000 LOG(log_debug, logtype_default, "ad_mkdir(\"%s\", %04o) {cwd: \"%s\"}",
1001 path, mode, getcwdpath());
1003 st_invalid = ad_mode_st(path, &mode, &stbuf);
1004 ret = mkdir( path, mode );
1005 if (ret || st_invalid)
1007 ad_chown(path, &stbuf);
1012 void ad_init(struct adouble *ad, int flags, int options)
1016 ad->ad_ops = &ad_adouble;
1017 ad->ad_rfp = &ad->ad_resource_fork;
1018 ad->ad_mdp = &ad->ad_resource_fork;
1021 ad->ad_ops = &ad_adouble_ea;
1022 ad->ad_rfp = &ad->ad_data_fork;
1023 ad->ad_mdp = &ad->ad_data_fork;
1026 LOG(log_error, logtype_default, "ad_init: unknown AD version");
1031 ad->ad_flags = flags;
1032 ad->ad_options = options;
1033 ad_data_fileno(ad) = -1;
1034 ad_reso_fileno(ad) = -1;
1035 ad_meta_fileno(ad) = -1;
1036 memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
1038 ad->ad_refcount = 1;
1039 ad->ad_open_forks = 0;
1040 ad->ad_resource_fork.adf_refcount = 0;
1041 ad->ad_data_fork.adf_refcount = 0;
1042 ad->ad_data_fork.adf_syml=0;
1047 * Open data-, metadata(header)- or ressource fork
1049 * ad_open(struct adouble *ad, const char *path, int adflags, int flags)
1050 * ad_open(struct adouble *ad, const char *path, int adflags, int flags, mode_t mode)
1052 * You must call ad_init() before ad_open, usually you'll just call it like this: \n
1055 * ad_init(&ad, vol->v_adouble, vol->v_ad_options);
1058 * Open a files data fork, metadata fork or ressource fork.
1060 * @param ad (rw) pointer to struct adouble
1061 * @param path (r) Path to file or directory
1062 * @param adflags (r) ADFLAGS_DF: open data fork \n
1063 * ADFLAGS_RF: open ressource fork \n
1064 * ADFLAGS_HF: open header (metadata) file \n
1065 * ADFLAGS_NOHF: it's not an error if header file couldn't be created \n
1066 * ADFLAGS_DIR: if path is a directory you MUST or ADFLAGS_DIR to adflags \n
1067 * The open mode flags (rw vs ro) have to take into account all the following requirements:
1068 * - we remember open fds for files because me must avoid a single close releasing fcntl locks for other
1069 * fds of the same file
1070 * - a file may be opened first ro, then rw and theres no way to upgrade this -> fork.c always opens rw
1071 * ADFLAGS_CHECK_OF: check for open forks from us and other afpd's
1072 * @param mode (r) mode used with O_CREATE
1074 * @returns 0 on success, any other value indicates an error
1076 int ad_open(struct adouble *ad, const char *path, int adflags, ...)
1082 LOG(log_debug, logtype_default, "ad_open(\"%s\", %s, %s)",
1083 fullpathname(path), adflags2logstr(adflags));
1085 if (ad->ad_inited != AD_INITED) {
1086 ad->ad_adflags = adflags;
1088 ad->ad_open_forks = ((ad->ad_data_fork.adf_refcount > 0) ? ATTRBIT_DOPEN : 0);
1089 if (ad->ad_resource_fork.adf_refcount > 0)
1090 ad->ad_open_forks |= ATTRBIT_ROPEN;
1093 va_start(args, adflags);
1094 if (adflags & ADFLAGS_CREATE)
1095 mode = va_arg(args, mode_t);
1098 if ((adflags & ADFLAGS_DF) && !(ad->ad_adflags & ADFLAGS_DF)) { /* 3 */
1099 EC_ZERO( ad_open_df(path, adflags, mode, ad) );
1100 ad->ad_adflags |= ADFLAGS_DF;
1103 if ((adflags & ADFLAGS_HF) && !(ad->ad_adflags & ADFLAGS_HF)) { /* 3 */
1104 EC_ZERO( ad_open_hf(path, adflags, mode, ad) );
1105 ad->ad_adflags |= ADFLAGS_HF;
1108 if ((adflags & ADFLAGS_RF) && !(ad->ad_adflags & ADFLAGS_RF)) { /* 3 */
1109 EC_ZERO( ad_open_rf(path, adflags, mode, ad) );
1110 ad->ad_adflags |= ADFLAGS_RF;
1118 * @brief open metadata, possibly as root
1120 * Return only metadata but try very hard ie at first try as user, then try as root.
1122 * @param name name of file/dir
1123 * @param flags ADFLAGS_DIR: name is a directory \n
1124 * ADFLAGS_CHECK_OF: test if name is open by us or another afpd process
1126 * @param adp pointer to struct adouble
1128 int ad_metadata(const char *name, int flags, struct adouble *adp)
1131 int ret, err, oflags;
1133 oflags = (flags & ADFLAGS_DIR) | ADFLAGS_HF | ADFLAGS_RDONLY;
1135 // if ((ret = ad_open(adp, name, oflags)) < 0 && errno == EACCES) {
1136 if ((ret = ad_open(adp, name, oflags, 0)) < 0 && errno == EACCES) {
1139 LOG(log_error, logtype_default, "ad_metadata(%s): seteuid failed %s", name, strerror(errno));
1143 /* we are root open read only */
1144 // ret = ad_open(adp, name, oflags);
1145 ret = ad_open(adp, name, oflags, 0);
1147 if ( seteuid(uid) < 0) {
1148 LOG(log_error, logtype_default, "ad_metadata: can't seteuid back");
1154 if ((ret == 0) && (ADFLAGS_CHECK_OF & flags)) {
1156 we need to check if the file is open by another process.
1157 it's slow so we only do it if we have to:
1159 - we don't already have the answer!
1161 adp->ad_open_forks |= ad_openforks(adp, adp->ad_open_forks);
1167 * @brief openat like wrapper for ad_metadata
1169 int ad_metadataat(int dirfd, const char *name, int flags, struct adouble *adp)
1175 if ((cwdfd = open(".", O_RDONLY) == -1) || (fchdir(dirfd) != 0)) {
1181 if (ad_metadata(name, flags, adp) < 0) {
1187 if (fchdir(cwdfd) != 0) {
1188 LOG(log_error, logtype_afpd, "ad_openat: cant chdir back, exiting");
1201 int ad_refresh(struct adouble *ad)
1204 if (ad_meta_fileno(ad) == -1)
1207 return ad->ad_ops->ad_header_read(ad, NULL);
1210 int ad_openat(struct adouble *ad,
1211 int dirfd, /* dir fd openat like */
1221 if ((cwdfd = open(".", O_RDONLY) == -1) || (fchdir(dirfd) != 0))
1225 va_start(args, adflags);
1226 if (adflags & ADFLAGS_CREATE)
1227 mode = va_arg(args, mode_t);
1230 EC_NEG1( ad_open(ad, path, adflags, mode) );
1233 if (fchdir(cwdfd) != 0) {
1234 AFP_PANIC("ad_openat: cant chdir back");