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Fix bug #6330 - DFS doesn't work on AIX. Jeremy.
[Samba.git] / source3 / smbd / filename.c
blob774ab27a74b958ba0834ff8fe2f9ce312539adf8
1 /*
2 Unix SMB/CIFS implementation.
3 filename handling routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1999-2007
6 Copyright (C) Ying Chen 2000
7 Copyright (C) Volker Lendecke 2007
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 /*
24 * New hash table stat cache code added by Ying Chen.
25 */
26
27 #include "includes.h"
28
29 static NTSTATUS build_stream_path(TALLOC_CTX *mem_ctx,
30 connection_struct *conn,
31 const char *orig_path,
32 const char *basepath,
33 const char *streamname,
34 SMB_STRUCT_STAT *pst,
35 char **path);
36
37 /****************************************************************************
38 Mangle the 2nd name and check if it is then equal to the first name.
39 ****************************************************************************/
40
41 static bool mangled_equal(const char *name1,
42 const char *name2,
43 const struct share_params *p)
44 {
45 char mname[13];
46
47 if (!name_to_8_3(name2, mname, False, p)) {
48 return False;
49 }
50 return strequal(name1, mname);
51 }
52
53 /****************************************************************************
54 Cope with the differing wildcard and non-wildcard error cases.
55 ****************************************************************************/
56
57 static NTSTATUS determine_path_error(const char *name,
58 bool allow_wcard_last_component)
59 {
60 const char *p;
61
62 if (!allow_wcard_last_component) {
63 /* Error code within a pathname. */
64 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
65 }
66
67 /* We're terminating here so we
68 * can be a little slower and get
69 * the error code right. Windows
70 * treats the last part of the pathname
71 * separately I think, so if the last
72 * component is a wildcard then we treat
73 * this ./ as "end of component" */
74
75 p = strchr(name, '/');
76
77 if (!p && (ms_has_wild(name) || ISDOT(name))) {
78 /* Error code at the end of a pathname. */
79 return NT_STATUS_OBJECT_NAME_INVALID;
80 } else {
81 /* Error code within a pathname. */
82 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
83 }
84 }
85
86 /****************************************************************************
87 This routine is called to convert names from the dos namespace to unix
88 namespace. It needs to handle any case conversions, mangling, format
89 changes etc.
90
91 We assume that we have already done a chdir() to the right "root" directory
92 for this service.
93
94 The function will return an NTSTATUS error if some part of the name except for
95 the last part cannot be resolved, else NT_STATUS_OK.
96
97 Note NT_STATUS_OK doesn't mean the name exists or is valid, just that we didn't
98 get any fatal errors that should immediately terminate the calling
99 SMB processing whilst resolving.
100
101 If the saved_last_component != 0, then the unmodified last component
102 of the pathname is returned there. If saved_last_component == 0 then nothing
103 is returned there.
104
105 If last_component_wcard is true then a MS wildcard was detected and
106 should be allowed in the last component of the path only.
107
108 On exit from unix_convert, if *pst was not null, then the file stat
109 struct will be returned if the file exists and was found, if not this
110 stat struct will be filled with zeros (and this can be detected by checking
111 for nlinks = 0, which can never be true for any file).
112 ****************************************************************************/
113
114 NTSTATUS unix_convert(TALLOC_CTX *ctx,
115 connection_struct *conn,
116 const char *orig_path,
117 bool allow_wcard_last_component,
118 char **pp_conv_path,
119 char **pp_saved_last_component,
120 SMB_STRUCT_STAT *pst)
121 {
122 SMB_STRUCT_STAT st;
123 char *start, *end;
124 char *dirpath = NULL;
125 char *name = NULL;
126 char *stream = NULL;
127 bool component_was_mangled = False;
128 bool name_has_wildcard = False;
129 bool posix_pathnames = false;
130 NTSTATUS result;
131 int ret = -1;
132
133 SET_STAT_INVALID(*pst);
134 *pp_conv_path = NULL;
135 if(pp_saved_last_component) {
136 *pp_saved_last_component = NULL;
137 }
138
139 if (conn->printer) {
140 /* we don't ever use the filenames on a printer share as a
141 filename - so don't convert them */
142 if (!(*pp_conv_path = talloc_strdup(ctx,orig_path))) {
143 return NT_STATUS_NO_MEMORY;
144 }
145 return NT_STATUS_OK;
146 }
147
148 DEBUG(5, ("unix_convert called on file \"%s\"\n", orig_path));
149
150 /*
151 * Conversion to basic unix format is already done in
152 * check_path_syntax().
153 */
154
155 /*
156 * Names must be relative to the root of the service - any leading /.
157 * and trailing /'s should have been trimmed by check_path_syntax().
158 */
159
160 #ifdef DEVELOPER
161 SMB_ASSERT(*orig_path != '/');
162 #endif
163
164 /*
165 * If we trimmed down to a single '\0' character
166 * then we should use the "." directory to avoid
167 * searching the cache, but not if we are in a
168 * printing share.
169 * As we know this is valid we can return true here.
170 */
171
172 if (!*orig_path) {
173 if (!(name = talloc_strdup(ctx,"."))) {
174 return NT_STATUS_NO_MEMORY;
175 }
176 if (SMB_VFS_STAT(conn,name,&st) == 0) {
177 *pst = st;
178 } else {
179 return map_nt_error_from_unix(errno);
180 }
181 DEBUG(5,("conversion finished \"\" -> %s\n",name));
182 goto done;
183 }
184
185 if (orig_path[0] == '.' && (orig_path[1] == '/' ||
186 orig_path[1] == '\0')) {
187 /* Start of pathname can't be "." only. */
188 if (orig_path[1] == '\0' || orig_path[2] == '\0') {
189 result = NT_STATUS_OBJECT_NAME_INVALID;
190 } else {
191 result =determine_path_error(
192 &orig_path[2], allow_wcard_last_component);
193 }
194 return result;
195 }
196
197 if (!(name = talloc_strdup(ctx, orig_path))) {
198 DEBUG(0, ("talloc_strdup failed\n"));
199 return NT_STATUS_NO_MEMORY;
200 }
201
202 /*
203 * Large directory fix normalization. If we're case sensitive, and
204 * the case preserving parameters are set to "no", normalize the case of
205 * the incoming filename from the client WHETHER IT EXISTS OR NOT !
206 * This is in conflict with the current (3.0.20) man page, but is
207 * what people expect from the "large directory howto". I'll update
208 * the man page. Thanks to jht@samba.org for finding this. JRA.
209 */
210
211 if (conn->case_sensitive && !conn->case_preserve &&
212 !conn->short_case_preserve) {
213 strnorm(name, lp_defaultcase(SNUM(conn)));
214 }
215
216 /*
217 * Ensure saved_last_component is valid even if file exists.
218 */
219
220 if(pp_saved_last_component) {
221 end = strrchr_m(name, '/');
222 if (end) {
223 *pp_saved_last_component = talloc_strdup(ctx, end + 1);
224 } else {
225 *pp_saved_last_component = talloc_strdup(ctx,
226 name);
227 }
228 }
229
230 posix_pathnames = lp_posix_pathnames();
231
232 if (!posix_pathnames) {
233 stream = strchr_m(name, ':');
234
235 if (stream != NULL) {
236 char *tmp = talloc_strdup(ctx, stream);
237 if (tmp == NULL) {
238 TALLOC_FREE(name);
239 return NT_STATUS_NO_MEMORY;
240 }
241 *stream = '\0';
242 stream = tmp;
243 }
244 }
245
246 start = name;
247
248 /* If we're providing case insentive semantics or
249 * the underlying filesystem is case insensitive,
250 * then a case-normalized hit in the stat-cache is
251 * authoratitive. JRA.
252 */
253
254 if((!conn->case_sensitive || !(conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH)) &&
255 stat_cache_lookup(conn, &name, &dirpath, &start, &st)) {
256 *pst = st;
257 goto done;
258 }
259
260 /*
261 * Make sure "dirpath" is an allocated string, we use this for
262 * building the directories with asprintf and free it.
263 */
264
265 if ((dirpath == NULL) && (!(dirpath = talloc_strdup(ctx,"")))) {
266 DEBUG(0, ("talloc_strdup failed\n"));
267 TALLOC_FREE(name);
268 return NT_STATUS_NO_MEMORY;
269 }
270
271 /*
272 * stat the name - if it exists then we are all done!
273 */
274
275 if (posix_pathnames) {
276 ret = SMB_VFS_LSTAT(conn,name,&st);
277 } else {
278 ret = SMB_VFS_STAT(conn,name,&st);
279 }
280
281 if (ret == 0) {
282 /* Ensure we catch all names with in "/."
283 this is disallowed under Windows. */
284 const char *p = strstr(name, "/."); /* mb safe. */
285 if (p) {
286 if (p[2] == '/') {
287 /* Error code within a pathname. */
288 result = NT_STATUS_OBJECT_PATH_NOT_FOUND;
289 goto fail;
290 } else if (p[2] == '\0') {
291 /* Error code at the end of a pathname. */
292 result = NT_STATUS_OBJECT_NAME_INVALID;
293 goto fail;
294 }
295 }
296 stat_cache_add(orig_path, name, conn->case_sensitive);
297 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
298 *pst = st;
299 goto done;
300 }
301
302 DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
303 name, dirpath, start));
304
305 /*
306 * A special case - if we don't have any mangling chars and are case
307 * sensitive or the underlying filesystem is case insentive then searching
308 * won't help.
309 */
310
311 if ((conn->case_sensitive || !(conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH)) &&
312 !mangle_is_mangled(name, conn->params)) {
313 goto done;
314 }
315
316 /*
317 * is_mangled() was changed to look at an entire pathname, not
318 * just a component. JRA.
319 */
320
321 if (mangle_is_mangled(start, conn->params)) {
322 component_was_mangled = True;
323 }
324
325 /*
326 * Now we need to recursively match the name against the real
327 * directory structure.
328 */
329
330 /*
331 * Match each part of the path name separately, trying the names
332 * as is first, then trying to scan the directory for matching names.
333 */
334
335 for (; start ; start = (end?end+1:(char *)NULL)) {
336 /*
337 * Pinpoint the end of this section of the filename.
338 */
339 /* mb safe. '/' can't be in any encoded char. */
340 end = strchr(start, '/');
341
342 /*
343 * Chop the name at this point.
344 */
345 if (end) {
346 *end = 0;
347 }
348
349 if (pp_saved_last_component) {
350 TALLOC_FREE(*pp_saved_last_component);
351 *pp_saved_last_component = talloc_strdup(ctx,
352 end ? end + 1 : start);
353 if (!*pp_saved_last_component) {
354 DEBUG(0, ("talloc failed\n"));
355 return NT_STATUS_NO_MEMORY;
356 }
357 }
358
359 /* The name cannot have a component of "." */
360
361 if (ISDOT(start)) {
362 if (!end) {
363 /* Error code at the end of a pathname. */
364 result = NT_STATUS_OBJECT_NAME_INVALID;
365 } else {
366 result = determine_path_error(end+1,
367 allow_wcard_last_component);
368 }
369 goto fail;
370 }
371
372 /* The name cannot have a wildcard if it's not
373 the last component. */
374
375 name_has_wildcard = ms_has_wild(start);
376
377 /* Wildcard not valid anywhere. */
378 if (name_has_wildcard && !allow_wcard_last_component) {
379 result = NT_STATUS_OBJECT_NAME_INVALID;
380 goto fail;
381 }
382
383 /* Wildcards never valid within a pathname. */
384 if (name_has_wildcard && end) {
385 result = NT_STATUS_OBJECT_NAME_INVALID;
386 goto fail;
387 }
388
389 /*
390 * Check if the name exists up to this point.
391 */
392
393 if (posix_pathnames) {
394 ret = SMB_VFS_LSTAT(conn,name, &st);
395 } else {
396 ret = SMB_VFS_STAT(conn,name, &st);
397 }
398
399 if (ret == 0) {
400 /*
401 * It exists. it must either be a directory or this must
402 * be the last part of the path for it to be OK.
403 */
404 if (end && !(st.st_mode & S_IFDIR)) {
405 /*
406 * An intermediate part of the name isn't
407 * a directory.
408 */
409 DEBUG(5,("Not a dir %s\n",start));
410 *end = '/';
411 /*
412 * We need to return the fact that the
413 * intermediate name resolution failed. This
414 * is used to return an error of ERRbadpath
415 * rather than ERRbadfile. Some Windows
416 * applications depend on the difference between
417 * these two errors.
418 */
419 result = NT_STATUS_OBJECT_PATH_NOT_FOUND;
420 goto fail;
421 }
422
423 if (!end) {
424 /*
425 * We just scanned for, and found the end of
426 * the path. We must return the valid stat
427 * struct. JRA.
428 */
429
430 *pst = st;
431 }
432
433 } else {
434 char *found_name = NULL;
435
436 /* Stat failed - ensure we don't use it. */
437 SET_STAT_INVALID(st);
438
439 /*
440 * Reset errno so we can detect
441 * directory open errors.
442 */
443 errno = 0;
444
445 /*
446 * Try to find this part of the path in the directory.
447 */
448
449 if (name_has_wildcard ||
450 (get_real_filename(conn, dirpath, start,
451 talloc_tos(),
452 &found_name) == -1)) {
453 char *unmangled;
454
455 if (end) {
456 /*
457 * An intermediate part of the name
458 * can't be found.
459 */
460 DEBUG(5,("Intermediate not found %s\n",
461 start));
462 *end = '/';
463
464 /*
465 * We need to return the fact that the
466 * intermediate name resolution failed.
467 * This is used to return an error of
468 * ERRbadpath rather than ERRbadfile.
469 * Some Windows applications depend on
470 * the difference between these two
471 * errors.
472 */
473
474 /*
475 * ENOENT, ENOTDIR and ELOOP all map
476 * to NT_STATUS_OBJECT_PATH_NOT_FOUND
477 * in the filename walk.
478 */
479
480 if (errno == ENOENT ||
481 errno == ENOTDIR ||
482 errno == ELOOP) {
483 result =
484 NT_STATUS_OBJECT_PATH_NOT_FOUND;
485 }
486 else {
487 result =
488 map_nt_error_from_unix(errno);
489 }
490 goto fail;
491 }
492
493 /* ENOENT is the only valid error here. */
494 if ((errno != 0) && (errno != ENOENT)) {
495 /*
496 * ENOTDIR and ELOOP both map to
497 * NT_STATUS_OBJECT_PATH_NOT_FOUND
498 * in the filename walk.
499 */
500 if (errno == ENOTDIR ||
501 errno == ELOOP) {
502 result =
503 NT_STATUS_OBJECT_PATH_NOT_FOUND;
504 }
505 else {
506 result =
507 map_nt_error_from_unix(errno);
508 }
509 goto fail;
510 }
511
512 /*
513 * Just the last part of the name doesn't exist.
514 * We need to strupper() or strlower() it as
515 * this conversion may be used for file creation
516 * purposes. Fix inspired by
517 * Thomas Neumann <t.neumann@iku-ag.de>.
518 */
519 if (!conn->case_preserve ||
520 (mangle_is_8_3(start, False,
521 conn->params) &&
522 !conn->short_case_preserve)) {
523 strnorm(start,
524 lp_defaultcase(SNUM(conn)));
525 }
526
527 /*
528 * check on the mangled stack to see if we can
529 * recover the base of the filename.
530 */
531
532 if (mangle_is_mangled(start, conn->params)
533 && mangle_lookup_name_from_8_3(ctx,
534 start,
535 &unmangled,
536 conn->params)) {
537 char *tmp;
538 size_t start_ofs = start - name;
539
540 if (*dirpath != '\0') {
541 tmp = talloc_asprintf(ctx,
542 "%s/%s", dirpath,
543 unmangled);
544 TALLOC_FREE(unmangled);
545 }
546 else {
547 tmp = unmangled;
548 }
549 if (tmp == NULL) {
550 DEBUG(0, ("talloc failed\n"));
551 return NT_STATUS_NO_MEMORY;
552 }
553 TALLOC_FREE(name);
554 name = tmp;
555 start = name + start_ofs;
556 end = start + strlen(start);
557 }
558
559 DEBUG(5,("New file %s\n",start));
560 goto done;
561 }
562
563
564 /*
565 * Restore the rest of the string. If the string was
566 * mangled the size may have changed.
567 */
568 if (end) {
569 char *tmp;
570 size_t start_ofs = start - name;
571
572 if (*dirpath != '\0') {
573 tmp = talloc_asprintf(ctx,
574 "%s/%s/%s", dirpath,
575 found_name, end+1);
576 }
577 else {
578 tmp = talloc_asprintf(ctx,
579 "%s/%s", found_name,
580 end+1);
581 }
582 if (tmp == NULL) {
583 DEBUG(0, ("talloc_asprintf failed\n"));
584 return NT_STATUS_NO_MEMORY;
585 }
586 TALLOC_FREE(name);
587 name = tmp;
588 start = name + start_ofs;
589 end = start + strlen(found_name);
590 *end = '\0';
591 } else {
592 char *tmp;
593 size_t start_ofs = start - name;
594
595 if (*dirpath != '\0') {
596 tmp = talloc_asprintf(ctx,
597 "%s/%s", dirpath,
598 found_name);
599 } else {
600 tmp = talloc_strdup(ctx,
601 found_name);
602 }
603 if (tmp == NULL) {
604 DEBUG(0, ("talloc failed\n"));
605 return NT_STATUS_NO_MEMORY;
606 }
607 TALLOC_FREE(name);
608 name = tmp;
609 start = name + start_ofs;
610
611 /*
612 * We just scanned for, and found the end of
613 * the path. We must return a valid stat struct
614 * if it exists. JRA.
615 */
616
617 if (posix_pathnames) {
618 ret = SMB_VFS_LSTAT(conn,name, &st);
619 } else {
620 ret = SMB_VFS_STAT(conn,name, &st);
621 }
622
623 if (ret == 0) {
624 *pst = st;
625 } else {
626 SET_STAT_INVALID(st);
627 }
628 }
629
630 TALLOC_FREE(found_name);
631 } /* end else */
632
633 #ifdef DEVELOPER
634 /*
635 * This sucks!
636 * We should never provide different behaviors
637 * depending on DEVELOPER!!!
638 */
639 if (VALID_STAT(st)) {
640 bool delete_pending;
641 get_file_infos(vfs_file_id_from_sbuf(conn, &st),
642 &delete_pending, NULL);
643 if (delete_pending) {
644 result = NT_STATUS_DELETE_PENDING;
645 goto fail;
646 }
647 }
648 #endif
649
650 /*
651 * Add to the dirpath that we have resolved so far.
652 */
653
654 if (*dirpath != '\0') {
655 char *tmp = talloc_asprintf(ctx,
656 "%s/%s", dirpath, start);
657 if (!tmp) {
658 DEBUG(0, ("talloc_asprintf failed\n"));
659 return NT_STATUS_NO_MEMORY;
660 }
661 TALLOC_FREE(dirpath);
662 dirpath = tmp;
663 }
664 else {
665 TALLOC_FREE(dirpath);
666 if (!(dirpath = talloc_strdup(ctx,start))) {
667 DEBUG(0, ("talloc_strdup failed\n"));
668 return NT_STATUS_NO_MEMORY;
669 }
670 }
671
672 /*
673 * Don't cache a name with mangled or wildcard components
674 * as this can change the size.
675 */
676
677 if(!component_was_mangled && !name_has_wildcard) {
678 stat_cache_add(orig_path, dirpath,
679 conn->case_sensitive);
680 }
681
682 /*
683 * Restore the / that we wiped out earlier.
684 */
685 if (end) {
686 *end = '/';
687 }
688 }
689
690 /*
691 * Don't cache a name with mangled or wildcard components
692 * as this can change the size.
693 */
694
695 if(!component_was_mangled && !name_has_wildcard) {
696 stat_cache_add(orig_path, name, conn->case_sensitive);
697 }
698
699 /*
700 * The name has been resolved.
701 */
702
703 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
704
705 done:
706 if (stream != NULL) {
707 char *tmp = NULL;
708
709 result = build_stream_path(ctx, conn, orig_path, name, stream,
710 pst, &tmp);
711 if (!NT_STATUS_IS_OK(result)) {
712 goto fail;
713 }
714
715 DEBUG(10, ("build_stream_path returned %s\n", tmp));
716
717 TALLOC_FREE(name);
718 name = tmp;
719 }
720 *pp_conv_path = name;
721 TALLOC_FREE(dirpath);
722 return NT_STATUS_OK;
723 fail:
724 DEBUG(10, ("dirpath = [%s] start = [%s]\n", dirpath, start));
725 if (*dirpath != '\0') {
726 *pp_conv_path = talloc_asprintf(ctx,
727 "%s/%s", dirpath, start);
728 } else {
729 *pp_conv_path = talloc_strdup(ctx, start);
730 }
731 if (!*pp_conv_path) {
732 DEBUG(0, ("talloc_asprintf failed\n"));
733 return NT_STATUS_NO_MEMORY;
734 }
735 TALLOC_FREE(name);
736 TALLOC_FREE(dirpath);
737 return result;
738 }
739
740 /****************************************************************************
741 Check a filename - possibly calling check_reduced_name.
742 This is called by every routine before it allows an operation on a filename.
743 It does any final confirmation necessary to ensure that the filename is
744 a valid one for the user to access.
745 ****************************************************************************/
746
747 NTSTATUS check_name(connection_struct *conn, const char *name)
748 {
749 if (IS_VETO_PATH(conn, name)) {
750 /* Is it not dot or dot dot. */
751 if (!((name[0] == '.') && (!name[1] ||
752 (name[1] == '.' && !name[2])))) {
753 DEBUG(5,("check_name: file path name %s vetoed\n",
754 name));
755 return map_nt_error_from_unix(ENOENT);
756 }
757 }
758
759 if (!lp_widelinks(SNUM(conn)) || !lp_symlinks(SNUM(conn))) {
760 NTSTATUS status = check_reduced_name(conn,name);
761 if (!NT_STATUS_IS_OK(status)) {
762 DEBUG(5,("check_name: name %s failed with %s\n",name,
763 nt_errstr(status)));
764 return status;
765 }
766 }
767
768 return NT_STATUS_OK;
769 }
770
771 /****************************************************************************
772 Check if two filenames are equal.
773 This needs to be careful about whether we are case sensitive.
774 ****************************************************************************/
775
776 static bool fname_equal(const char *name1, const char *name2,
777 bool case_sensitive)
778 {
779 /* Normal filename handling */
780 if (case_sensitive) {
781 return(strcmp(name1,name2) == 0);
782 }
783
784 return(strequal(name1,name2));
785 }
786
787 /****************************************************************************
788 Scan a directory to find a filename, matching without case sensitivity.
789 If the name looks like a mangled name then try via the mangling functions
790 ****************************************************************************/
791
792 static int get_real_filename_full_scan(connection_struct *conn,
793 const char *path, const char *name,
794 TALLOC_CTX *mem_ctx, char **found_name)
795 {
796 struct smb_Dir *cur_dir;
797 const char *dname;
798 bool mangled;
799 char *unmangled_name = NULL;
800 long curpos;
801
802 mangled = mangle_is_mangled(name, conn->params);
803
804 /* handle null paths */
805 if ((path == NULL) || (*path == 0)) {
806 path = ".";
807 }
808
809 /* If we have a case-sensitive filesystem, it doesn't do us any
810 * good to search for a name. If a case variation of the name was
811 * there, then the original stat(2) would have found it.
812 */
813 if (!mangled && !(conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH)) {
814 errno = ENOENT;
815 return -1;
816 }
817
818 /*
819 * The incoming name can be mangled, and if we de-mangle it
820 * here it will not compare correctly against the filename (name2)
821 * read from the directory and then mangled by the name_to_8_3()
822 * call. We need to mangle both names or neither.
823 * (JRA).
824 *
825 * Fix for bug found by Dina Fine. If in case sensitive mode then
826 * the mangle cache is no good (3 letter extension could be wrong
827 * case - so don't demangle in this case - leave as mangled and
828 * allow the mangling of the directory entry read (which is done
829 * case insensitively) to match instead. This will lead to more
830 * false positive matches but we fail completely without it. JRA.
831 */
832
833 if (mangled && !conn->case_sensitive) {
834 mangled = !mangle_lookup_name_from_8_3(talloc_tos(), name,
835 &unmangled_name,
836 conn->params);
837 if (!mangled) {
838 /* Name is now unmangled. */
839 name = unmangled_name;
840 }
841 }
842
843 /* open the directory */
844 if (!(cur_dir = OpenDir(talloc_tos(), conn, path, NULL, 0))) {
845 DEBUG(3,("scan dir didn't open dir [%s]\n",path));
846 TALLOC_FREE(unmangled_name);
847 return -1;
848 }
849
850 /* now scan for matching names */
851 curpos = 0;
852 while ((dname = ReadDirName(cur_dir, &curpos, NULL))) {
853
854 /* Is it dot or dot dot. */
855 if (ISDOT(dname) || ISDOTDOT(dname)) {
856 continue;
857 }
858
859 /*
860 * At this point dname is the unmangled name.
861 * name is either mangled or not, depending on the state
862 * of the "mangled" variable. JRA.
863 */
864
865 /*
866 * Check mangled name against mangled name, or unmangled name
867 * against unmangled name.
868 */
869
870 if ((mangled && mangled_equal(name,dname,conn->params)) ||
871 fname_equal(name, dname, conn->case_sensitive)) {
872 /* we've found the file, change it's name and return */
873 *found_name = talloc_strdup(mem_ctx, dname);
874 TALLOC_FREE(unmangled_name);
875 TALLOC_FREE(cur_dir);
876 if (!*found_name) {
877 errno = ENOMEM;
878 return -1;
879 }
880 return 0;
881 }
882 }
883
884 TALLOC_FREE(unmangled_name);
885 TALLOC_FREE(cur_dir);
886 errno = ENOENT;
887 return -1;
888 }
889
890 /****************************************************************************
891 Wrapper around the vfs get_real_filename and the full directory scan
892 fallback.
893 ****************************************************************************/
894
895 int get_real_filename(connection_struct *conn, const char *path,
896 const char *name, TALLOC_CTX *mem_ctx,
897 char **found_name)
898 {
899 int ret;
900
901 /* Try the vfs first to take advantage of case-insensitive stat. */
902 ret = SMB_VFS_GET_REAL_FILENAME(conn, path, name, mem_ctx, found_name);
903
904 /*
905 * If the case-insensitive stat was successful, or returned an error
906 * other than EOPNOTSUPP then there is no need to fall back on the
907 * full directory scan.
908 */
909 if (ret == 0 || (ret == -1 && errno != EOPNOTSUPP)) {
910 return ret;
911 }
912
913 ret = get_real_filename_full_scan(conn, path, name, mem_ctx,
914 found_name);
915 return ret;
916 }
917
918 static NTSTATUS build_stream_path(TALLOC_CTX *mem_ctx,
919 connection_struct *conn,
920 const char *orig_path,
921 const char *basepath,
922 const char *streamname,
923 SMB_STRUCT_STAT *pst,
924 char **path)
925 {
926 SMB_STRUCT_STAT st;
927 char *result = NULL;
928 NTSTATUS status;
929 unsigned int i, num_streams;
930 struct stream_struct *streams = NULL;
931
932 result = talloc_asprintf(mem_ctx, "%s%s", basepath, streamname);
933 if (result == NULL) {
934 return NT_STATUS_NO_MEMORY;
935 }
936
937 if (SMB_VFS_STAT(conn, result, &st) == 0) {
938 *pst = st;
939 *path = result;
940 return NT_STATUS_OK;
941 }
942
943 if (errno != ENOENT) {
944 status = map_nt_error_from_unix(errno);
945 DEBUG(10, ("vfs_stat failed: %s\n", nt_errstr(status)));
946 goto fail;
947 }
948
949 status = SMB_VFS_STREAMINFO(conn, NULL, basepath, mem_ctx,
950 &num_streams, &streams);
951
952 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
953 SET_STAT_INVALID(*pst);
954 *path = result;
955 return NT_STATUS_OK;
956 }
957
958 if (!NT_STATUS_IS_OK(status)) {
959 DEBUG(10, ("vfs_streaminfo failed: %s\n", nt_errstr(status)));
960 goto fail;
961 }
962
963 for (i=0; i<num_streams; i++) {
964 DEBUG(10, ("comparing [%s] and [%s]: ",
965 streamname, streams[i].name));
966 if (fname_equal(streamname, streams[i].name,
967 conn->case_sensitive)) {
968 DEBUGADD(10, ("equal\n"));
969 break;
970 }
971 DEBUGADD(10, ("not equal\n"));
972 }
973
974 if (i == num_streams) {
975 SET_STAT_INVALID(*pst);
976 *path = result;
977 TALLOC_FREE(streams);
978 return NT_STATUS_OK;
979 }
980
981 TALLOC_FREE(result);
982
983 result = talloc_asprintf(mem_ctx, "%s%s", basepath, streams[i].name);
984 if (result == NULL) {
985 status = NT_STATUS_NO_MEMORY;
986 goto fail;
987 }
988
989 SET_STAT_INVALID(*pst);
990
991 if (SMB_VFS_STAT(conn, result, pst) == 0) {
992 stat_cache_add(orig_path, result, conn->case_sensitive);
993 }
994
995 *path = result;
996 TALLOC_FREE(streams);
997 return NT_STATUS_OK;
998
999 fail:
1000 TALLOC_FREE(result);
1001 TALLOC_FREE(streams);
1002 return status;
1003 }
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