Context Navigation

source: branches/samba-3.3.x/source/smbd/filename.c@ 246

Visit:

Last change on this file since 246 was 224, checked in by Herwig Bauernfeind, 16 years ago
Update Samba 3.3 branch to 3.3.4
File size: 25.5 KB

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

Note: See TracBrowser for help on using the repository browser.

Download in other formats: