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source: branches/samba-3.5.x/source3/smbd/filename.c@ 717

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Last change on this file since 717 was 599, checked in by Herwig Bauernfeind, 14 years ago
Samba 3.5: Update trunk to 3.5.9
File size: 32.3 KB

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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	struct smb_filename *smb_fname);
33
34	/****************************************************************************
35	Mangle the 2nd name and check if it is then equal to the first name.
36	****************************************************************************/
37
38	static bool mangled_equal(const char *name1,
39	const char *name2,
40	const struct share_params *p)
41	{
42	char mname[13];
43
44	if (!name_to_8_3(name2, mname, False, p)) {
45	return False;
46	}
47	return strequal(name1, mname);
48	}
49
50	/****************************************************************************
51	Cope with the differing wildcard and non-wildcard error cases.
52	****************************************************************************/
53
54	static NTSTATUS determine_path_error(const char *name,
55	bool allow_wcard_last_component)
56	{
57	const char *p;
58
59	if (!allow_wcard_last_component) {
60	/* Error code within a pathname. */
61	return NT_STATUS_OBJECT_PATH_NOT_FOUND;
62	}
63
64	/* We're terminating here so we
65	* can be a little slower and get
66	* the error code right. Windows
67	* treats the last part of the pathname
68	* separately I think, so if the last
69	* component is a wildcard then we treat
70	* this ./ as "end of component" */
71
72	p = strchr(name, '/');
73
74	if (!p && (ms_has_wild(name) \|\| ISDOT(name))) {
75	/* Error code at the end of a pathname. */
76	return NT_STATUS_OBJECT_NAME_INVALID;
77	} else {
78	/* Error code within a pathname. */
79	return NT_STATUS_OBJECT_PATH_NOT_FOUND;
80	}
81	}
82
83	static NTSTATUS check_for_dot_component(const struct smb_filename *smb_fname)
84	{
85	/* Ensure we catch all names with in "/."
86	this is disallowed under Windows and
87	in POSIX they've already been removed. */
88	const char p = strstr(smb_fname->base_name, "/."); /mb safe*/
89	if (p) {
90	if (p[2] == '/') {
91	/* Error code within a pathname. */
92	return NT_STATUS_OBJECT_PATH_NOT_FOUND;
93	} else if (p[2] == '\0') {
94	/* Error code at the end of a pathname. */
95	return NT_STATUS_OBJECT_NAME_INVALID;
96	}
97	}
98	return NT_STATUS_OK;
99	}
100
101	/****************************************************************************
102	This routine is called to convert names from the dos namespace to unix
103	namespace. It needs to handle any case conversions, mangling, format changes,
104	streams etc.
105
106	We assume that we have already done a chdir() to the right "root" directory
107	for this service.
108
109	The function will return an NTSTATUS error if some part of the name except for
110	the last part cannot be resolved, else NT_STATUS_OK.
111
112	Note NT_STATUS_OK doesn't mean the name exists or is valid, just that we
113	didn't get any fatal errors that should immediately terminate the calling SMB
114	processing whilst resolving.
115
116	If the UCF_SAVE_LCOMP flag is passed in, then the unmodified last component
117	of the pathname is set in smb_filename->original_lcomp.
118
119	If UCF_ALWAYS_ALLOW_WCARD_LCOMP is passed in, then a MS wildcard was detected
120	and should be allowed in the last component of the path only.
121
122	If the orig_path was a stream, smb_filename->base_name will point to the base
123	filename, and smb_filename->stream_name will point to the stream name. If
124	orig_path was not a stream, then smb_filename->stream_name will be NULL.
125
126	On exit from unix_convert, the smb_filename->st stat struct will be populated
127	if the file exists and was found, if not this stat struct will be filled with
128	zeros (and this can be detected by checking for nlinks = 0, which can never be
129	true for any file).
130	****************************************************************************/
131
132	NTSTATUS unix_convert(TALLOC_CTX *ctx,
133	connection_struct *conn,
134	const char *orig_path,
135	struct smb_filename **smb_fname_out,
136	uint32_t ucf_flags)
137	{
138	struct smb_filename *smb_fname = NULL;
139	char start, end;
140	char *dirpath = NULL;
141	char *stream = NULL;
142	bool component_was_mangled = False;
143	bool name_has_wildcard = False;
144	bool posix_pathnames = false;
145	bool allow_wcard_last_component =
146	(ucf_flags & UCF_ALWAYS_ALLOW_WCARD_LCOMP);
147	bool save_last_component = ucf_flags & UCF_SAVE_LCOMP;
148	NTSTATUS status;
149	int ret = -1;
150
151	*smb_fname_out = NULL;
152
153	smb_fname = talloc_zero(ctx, struct smb_filename);
154	if (smb_fname == NULL) {
155	return NT_STATUS_NO_MEMORY;
156	}
157
158	if (conn->printer) {
159	/* we don't ever use the filenames on a printer share as a
160	filename - so don't convert them */
161	if (!(smb_fname->base_name = talloc_strdup(smb_fname,
162	orig_path))) {
163	status = NT_STATUS_NO_MEMORY;
164	goto err;
165	}
166	goto done;
167	}
168
169	DEBUG(5, ("unix_convert called on file \"%s\"\n", orig_path));
170
171	/*
172	* Conversion to basic unix format is already done in
173	* check_path_syntax().
174	*/
175
176	/*
177	* Names must be relative to the root of the service - any leading /.
178	* and trailing /'s should have been trimmed by check_path_syntax().
179	*/
180
181	#ifdef DEVELOPER
182	SMB_ASSERT(*orig_path != '/');
183	#endif
184
185	/*
186	* If we trimmed down to a single '\0' character
187	* then we should use the "." directory to avoid
188	* searching the cache, but not if we are in a
189	* printing share.
190	* As we know this is valid we can return true here.
191	*/
192
193	if (!*orig_path) {
194	if (!(smb_fname->base_name = talloc_strdup(smb_fname, "."))) {
195	status = NT_STATUS_NO_MEMORY;
196	goto err;
197	}
198	if (SMB_VFS_STAT(conn, smb_fname) != 0) {
199	status = map_nt_error_from_unix(errno);
200	goto err;
201	}
202	DEBUG(5, ("conversion finished \"\" -> %s\n",
203	smb_fname->base_name));
204	goto done;
205	}
206
207	if (orig_path[0] == '.' && (orig_path[1] == '/' \|\|
208	orig_path[1] == '\0')) {
209	/* Start of pathname can't be "." only. */
210	if (orig_path[1] == '\0' \|\| orig_path[2] == '\0') {
211	status = NT_STATUS_OBJECT_NAME_INVALID;
212	} else {
213	status =determine_path_error(&orig_path[2],
214	allow_wcard_last_component);
215	}
216	goto err;
217	}
218
219	/* Start with the full orig_path as given by the caller. */
220	if (!(smb_fname->base_name = talloc_strdup(smb_fname, orig_path))) {
221	DEBUG(0, ("talloc_strdup failed\n"));
222	status = NT_STATUS_NO_MEMORY;
223	goto err;
224	}
225
226	/*
227	* Large directory fix normalization. If we're case sensitive, and
228	* the case preserving parameters are set to "no", normalize the case of
229	* the incoming filename from the client WHETHER IT EXISTS OR NOT !
230	* This is in conflict with the current (3.0.20) man page, but is
231	* what people expect from the "large directory howto". I'll update
232	* the man page. Thanks to jht@samba.org for finding this. JRA.
233	*/
234
235	if (conn->case_sensitive && !conn->case_preserve &&
236	!conn->short_case_preserve) {
237	strnorm(smb_fname->base_name, lp_defaultcase(SNUM(conn)));
238	}
239
240	/*
241	* Ensure saved_last_component is valid even if file exists.
242	*/
243
244	if(save_last_component) {
245	end = strrchr_m(smb_fname->base_name, '/');
246	if (end) {
247	smb_fname->original_lcomp = talloc_strdup(smb_fname,
248	end + 1);
249	} else {
250	smb_fname->original_lcomp =
251	talloc_strdup(smb_fname, smb_fname->base_name);
252	}
253	if (smb_fname->original_lcomp == NULL) {
254	status = NT_STATUS_NO_MEMORY;
255	goto err;
256	}
257	}
258
259	posix_pathnames = (lp_posix_pathnames() \|\|
260	(ucf_flags & UCF_POSIX_PATHNAMES));
261
262	/*
263	* Strip off the stream, and add it back when we're done with the
264	* base_name.
265	*/
266	if (!posix_pathnames) {
267	stream = strchr_m(smb_fname->base_name, ':');
268
269	if (stream != NULL) {
270	char *tmp = talloc_strdup(smb_fname, stream);
271	if (tmp == NULL) {
272	status = NT_STATUS_NO_MEMORY;
273	goto err;
274	}
275	/*
276	* Since this is actually pointing into
277	* smb_fname->base_name this truncates base_name.
278	*/
279	*stream = '\0';
280	stream = tmp;
281	}
282	}
283
284	start = smb_fname->base_name;
285
286	/*
287	* If we're providing case insentive semantics or
288	* the underlying filesystem is case insensitive,
289	* then a case-normalized hit in the stat-cache is
290	* authoratitive. JRA.
291	*
292	* Note: We're only checking base_name. The stream_name will be
293	* added and verified in build_stream_path().
294	*/
295
296	if((!conn->case_sensitive \|\| !(conn->fs_capabilities &
297	FILE_CASE_SENSITIVE_SEARCH)) &&
298	stat_cache_lookup(conn, &smb_fname->base_name, &dirpath, &start,
299	&smb_fname->st)) {
300	goto done;
301	}
302
303	/*
304	* Make sure "dirpath" is an allocated string, we use this for
305	* building the directories with asprintf and free it.
306	*/
307
308	if ((dirpath == NULL) && (!(dirpath = talloc_strdup(ctx,"")))) {
309	DEBUG(0, ("talloc_strdup failed\n"));
310	status = NT_STATUS_NO_MEMORY;
311	goto err;
312	}
313
314	/*
315	* If we have a wildcard we must walk the path to
316	* find where the error is, even if case sensitive
317	* is true.
318	*/
319
320	name_has_wildcard = ms_has_wild(smb_fname->base_name);
321	if (name_has_wildcard && !allow_wcard_last_component) {
322	/* Wildcard not valid anywhere. */
323	status = NT_STATUS_OBJECT_NAME_INVALID;
324	goto fail;
325	}
326
327	DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
328	smb_fname->base_name, dirpath, start));
329
330	if (!name_has_wildcard) {
331	/*
332	* stat the name - if it exists then we can add the stream back (if
333	* there was one) and be done!
334	*/
335
336	if (posix_pathnames) {
337	ret = SMB_VFS_LSTAT(conn, smb_fname);
338	} else {
339	ret = SMB_VFS_STAT(conn, smb_fname);
340	}
341
342	if (ret == 0) {
343	status = check_for_dot_component(smb_fname);
344	if (!NT_STATUS_IS_OK(status)) {
345	goto fail;
346	}
347	/* Add the path (not including the stream) to the cache. */
348	stat_cache_add(orig_path, smb_fname->base_name,
349	conn->case_sensitive);
350	DEBUG(5,("conversion of base_name finished %s -> %s\n",
351	orig_path, smb_fname->base_name));
352	goto done;
353	}
354
355	/* Stat failed - ensure we don't use it. */
356	SET_STAT_INVALID(smb_fname->st);
357
358	/*
359	* A special case - if we don't have any wildcards or mangling chars and are case
360	* sensitive or the underlying filesystem is case insentive then searching
361	* won't help.
362	*/
363
364	if ((conn->case_sensitive \|\| !(conn->fs_capabilities &
365	FILE_CASE_SENSITIVE_SEARCH)) &&
366	!mangle_is_mangled(smb_fname->base_name, conn->params)) {
367
368	status = check_for_dot_component(smb_fname);
369	if (!NT_STATUS_IS_OK(status)) {
370	goto fail;
371	}
372
373	/*
374	* The stat failed. Could be ok as it could be
375	* a new file.
376	*/
377
378	if (errno == ENOTDIR \|\| errno == ELOOP) {
379	status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
380	goto fail;
381	} else if (errno == ENOENT) {
382	/*
383	* Was it a missing last component ?
384	* or a missing intermediate component ?
385	*/
386	struct smb_filename parent_fname;
387	ZERO_STRUCT(parent_fname);
388	if (!parent_dirname(ctx, smb_fname->base_name,
389	&parent_fname.base_name,
390	NULL)) {
391	status = NT_STATUS_NO_MEMORY;
392	goto fail;
393	}
394	if (posix_pathnames) {
395	ret = SMB_VFS_LSTAT(conn, &parent_fname);
396	} else {
397	ret = SMB_VFS_STAT(conn, &parent_fname);
398	}
399	if (ret == -1) {
400	if (errno == ENOTDIR \|\|
401	errno == ENOENT \|\|
402	errno == ELOOP) {
403	status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
404	goto fail;
405	}
406	}
407	/*
408	* Missing last component is ok - new file.
409	* Also deal with permission denied elsewhere.
410	* Just drop out to done.
411	*/
412	goto done;
413	}
414	}
415	}
416
417	/*
418	* is_mangled() was changed to look at an entire pathname, not
419	* just a component. JRA.
420	*/
421
422	if (mangle_is_mangled(start, conn->params)) {
423	component_was_mangled = True;
424	}
425
426	/*
427	* Now we need to recursively match the name against the real
428	* directory structure.
429	*/
430
431	/*
432	* Match each part of the path name separately, trying the names
433	* as is first, then trying to scan the directory for matching names.
434	*/
435
436	for (; start ; start = (end?end+1:(char *)NULL)) {
437	/*
438	* Pinpoint the end of this section of the filename.
439	*/
440	/* mb safe. '/' can't be in any encoded char. */
441	end = strchr(start, '/');
442
443	/*
444	* Chop the name at this point.
445	*/
446	if (end) {
447	*end = 0;
448	}
449
450	if (save_last_component) {
451	TALLOC_FREE(smb_fname->original_lcomp);
452	smb_fname->original_lcomp = talloc_strdup(smb_fname,
453	end ? end + 1 : start);
454	if (!smb_fname->original_lcomp) {
455	DEBUG(0, ("talloc failed\n"));
456	status = NT_STATUS_NO_MEMORY;
457	goto err;
458	}
459	}
460
461	/* The name cannot have a component of "." */
462
463	if (ISDOT(start)) {
464	if (!end) {
465	/* Error code at the end of a pathname. */
466	status = NT_STATUS_OBJECT_NAME_INVALID;
467	} else {
468	status = determine_path_error(end+1,
469	allow_wcard_last_component);
470	}
471	goto fail;
472	}
473
474	/* The name cannot have a wildcard if it's not
475	the last component. */
476
477	name_has_wildcard = ms_has_wild(start);
478
479	/* Wildcards never valid within a pathname. */
480	if (name_has_wildcard && end) {
481	status = NT_STATUS_OBJECT_NAME_INVALID;
482	goto fail;
483	}
484
485	/*
486	* Check if the name exists up to this point.
487	*/
488
489	if (posix_pathnames) {
490	ret = SMB_VFS_LSTAT(conn, smb_fname);
491	} else {
492	ret = SMB_VFS_STAT(conn, smb_fname);
493	}
494
495	if (ret == 0) {
496	/*
497	* It exists. it must either be a directory or this must
498	* be the last part of the path for it to be OK.
499	*/
500	if (end && !S_ISDIR(smb_fname->st.st_ex_mode)) {
501	/*
502	* An intermediate part of the name isn't
503	* a directory.
504	*/
505	DEBUG(5,("Not a dir %s\n",start));
506	*end = '/';
507	/*
508	* We need to return the fact that the
509	* intermediate name resolution failed. This
510	* is used to return an error of ERRbadpath
511	* rather than ERRbadfile. Some Windows
512	* applications depend on the difference between
513	* these two errors.
514	*/
515	status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
516	goto fail;
517	}
518
519	} else {
520	char *found_name = NULL;
521
522	/* Stat failed - ensure we don't use it. */
523	SET_STAT_INVALID(smb_fname->st);
524
525	/*
526	* Reset errno so we can detect
527	* directory open errors.
528	*/
529	errno = 0;
530
531	/*
532	* Try to find this part of the path in the directory.
533	*/
534
535	if (name_has_wildcard \|\|
536	(get_real_filename(conn, dirpath, start,
537	talloc_tos(),
538	&found_name) == -1)) {
539	char *unmangled;
540
541	if (end) {
542	/*
543	* An intermediate part of the name
544	* can't be found.
545	*/
546	DEBUG(5,("Intermediate not found %s\n",
547	start));
548	*end = '/';
549
550	/*
551	* We need to return the fact that the
552	* intermediate name resolution failed.
553	* This is used to return an error of
554	* ERRbadpath rather than ERRbadfile.
555	* Some Windows applications depend on
556	* the difference between these two
557	* errors.
558	*/
559
560	/*
561	* ENOENT, ENOTDIR and ELOOP all map
562	* to NT_STATUS_OBJECT_PATH_NOT_FOUND
563	* in the filename walk.
564	*/
565
566	if (errno == ENOENT \|\|
567	errno == ENOTDIR \|\|
568	errno == ELOOP) {
569	status =
570	NT_STATUS_OBJECT_PATH_NOT_FOUND;
571	}
572	else {
573	status =
574	map_nt_error_from_unix(errno);
575	}
576	goto fail;
577	}
578
579	/*
580	* ENOENT/EACCESS are the only valid errors
581	* here. EACCESS needs handling here for
582	* "dropboxes", i.e. directories where users
583	* can only put stuff with permission -wx.
584	*/
585	if ((errno != 0) && (errno != ENOENT)
586	&& (errno != EACCES)) {
587	/*
588	* ENOTDIR and ELOOP both map to
589	* NT_STATUS_OBJECT_PATH_NOT_FOUND
590	* in the filename walk.
591	*/
592	if (errno == ENOTDIR \|\|
593	errno == ELOOP) {
594	status =
595	NT_STATUS_OBJECT_PATH_NOT_FOUND;
596	} else {
597	status =
598	map_nt_error_from_unix(errno);
599	}
600	goto fail;
601	}
602
603	/*
604	* Just the last part of the name doesn't exist.
605	* We need to strupper() or strlower() it as
606	* this conversion may be used for file creation
607	* purposes. Fix inspired by
608	* Thomas Neumann <t.neumann@iku-ag.de>.
609	*/
610	if (!conn->case_preserve \|\|
611	(mangle_is_8_3(start, False,
612	conn->params) &&
613	!conn->short_case_preserve)) {
614	strnorm(start,
615	lp_defaultcase(SNUM(conn)));
616	}
617
618	/*
619	* check on the mangled stack to see if we can
620	* recover the base of the filename.
621	*/
622
623	if (mangle_is_mangled(start, conn->params)
624	&& mangle_lookup_name_from_8_3(ctx,
625	start,
626	&unmangled,
627	conn->params)) {
628	char *tmp;
629	size_t start_ofs =
630	start - smb_fname->base_name;
631
632	if (*dirpath != '\0') {
633	tmp = talloc_asprintf(
634	smb_fname, "%s/%s",
635	dirpath, unmangled);
636	TALLOC_FREE(unmangled);
637	}
638	else {
639	tmp = unmangled;
640	}
641	if (tmp == NULL) {
642	DEBUG(0, ("talloc failed\n"));
643	status = NT_STATUS_NO_MEMORY;
644	goto err;
645	}
646	TALLOC_FREE(smb_fname->base_name);
647	smb_fname->base_name = tmp;
648	start =
649	smb_fname->base_name + start_ofs;
650	end = start + strlen(start);
651	}
652
653	DEBUG(5,("New file %s\n",start));
654	goto done;
655	}
656
657
658	/*
659	* Restore the rest of the string. If the string was
660	* mangled the size may have changed.
661	*/
662	if (end) {
663	char *tmp;
664	size_t start_ofs =
665	start - smb_fname->base_name;
666
667	if (*dirpath != '\0') {
668	tmp = talloc_asprintf(smb_fname,
669	"%s/%s/%s", dirpath,
670	found_name, end+1);
671	}
672	else {
673	tmp = talloc_asprintf(smb_fname,
674	"%s/%s", found_name,
675	end+1);
676	}
677	if (tmp == NULL) {
678	DEBUG(0, ("talloc_asprintf failed\n"));
679	status = NT_STATUS_NO_MEMORY;
680	goto err;
681	}
682	TALLOC_FREE(smb_fname->base_name);
683	smb_fname->base_name = tmp;
684	start = smb_fname->base_name + start_ofs;
685	end = start + strlen(found_name);
686	*end = '\0';
687	} else {
688	char *tmp;
689	size_t start_ofs =
690	start - smb_fname->base_name;
691
692	if (*dirpath != '\0') {
693	tmp = talloc_asprintf(smb_fname,
694	"%s/%s", dirpath,
695	found_name);
696	} else {
697	tmp = talloc_strdup(smb_fname,
698	found_name);
699	}
700	if (tmp == NULL) {
701	DEBUG(0, ("talloc failed\n"));
702	status = NT_STATUS_NO_MEMORY;
703	goto err;
704	}
705	TALLOC_FREE(smb_fname->base_name);
706	smb_fname->base_name = tmp;
707	start = smb_fname->base_name + start_ofs;
708
709	/*
710	* We just scanned for, and found the end of
711	* the path. We must return a valid stat struct
712	* if it exists. JRA.
713	*/
714
715	if (posix_pathnames) {
716	ret = SMB_VFS_LSTAT(conn, smb_fname);
717	} else {
718	ret = SMB_VFS_STAT(conn, smb_fname);
719	}
720
721	if (ret != 0) {
722	SET_STAT_INVALID(smb_fname->st);
723	}
724	}
725
726	TALLOC_FREE(found_name);
727	} /* end else */
728
729	#ifdef DEVELOPER
730	/*
731	* This sucks!
732	* We should never provide different behaviors
733	* depending on DEVELOPER!!!
734	*/
735	if (VALID_STAT(smb_fname->st)) {
736	bool delete_pending;
737	get_file_infos(vfs_file_id_from_sbuf(conn,
738	&smb_fname->st),
739	&delete_pending, NULL);
740	if (delete_pending) {
741	status = NT_STATUS_DELETE_PENDING;
742	goto fail;
743	}
744	}
745	#endif
746
747	/*
748	* Add to the dirpath that we have resolved so far.
749	*/
750
751	if (*dirpath != '\0') {
752	char *tmp = talloc_asprintf(ctx,
753	"%s/%s", dirpath, start);
754	if (!tmp) {
755	DEBUG(0, ("talloc_asprintf failed\n"));
756	status = NT_STATUS_NO_MEMORY;
757	goto err;
758	}
759	TALLOC_FREE(dirpath);
760	dirpath = tmp;
761	}
762	else {
763	TALLOC_FREE(dirpath);
764	if (!(dirpath = talloc_strdup(ctx,start))) {
765	DEBUG(0, ("talloc_strdup failed\n"));
766	status = NT_STATUS_NO_MEMORY;
767	goto err;
768	}
769	}
770
771	/*
772	* Cache the dirpath thus far. Don't cache a name with mangled
773	* or wildcard components as this can change the size.
774	*/
775	if(!component_was_mangled && !name_has_wildcard) {
776	stat_cache_add(orig_path, dirpath,
777	conn->case_sensitive);
778	}
779
780	/*
781	* Restore the / that we wiped out earlier.
782	*/
783	if (end) {
784	*end = '/';
785	}
786	}
787
788	/*
789	* Cache the full path. Don't cache a name with mangled or wildcard
790	* components as this can change the size.
791	*/
792
793	if(!component_was_mangled && !name_has_wildcard) {
794	stat_cache_add(orig_path, smb_fname->base_name,
795	conn->case_sensitive);
796	}
797
798	/*
799	* The name has been resolved.
800	*/
801
802	DEBUG(5,("conversion finished %s -> %s\n", orig_path,
803	smb_fname->base_name));
804
805	done:
806	/* Add back the stream if one was stripped off originally. */
807	if (stream != NULL) {
808	smb_fname->stream_name = stream;
809
810	/* Check path now that the base_name has been converted. */
811	status = build_stream_path(ctx, conn, orig_path, smb_fname);
812	if (!NT_STATUS_IS_OK(status)) {
813	goto fail;
814	}
815	}
816	TALLOC_FREE(dirpath);
817	*smb_fname_out = smb_fname;
818	return NT_STATUS_OK;
819	fail:
820	DEBUG(10, ("dirpath = [%s] start = [%s]\n", dirpath, start));
821	if (*dirpath != '\0') {
822	smb_fname->base_name = talloc_asprintf(smb_fname, "%s/%s",
823	dirpath, start);
824	} else {
825	smb_fname->base_name = talloc_strdup(smb_fname, start);
826	}
827	if (!smb_fname->base_name) {
828	DEBUG(0, ("talloc_asprintf failed\n"));
829	status = NT_STATUS_NO_MEMORY;
830	goto err;
831	}
832
833	*smb_fname_out = smb_fname;
834	TALLOC_FREE(dirpath);
835	return status;
836	err:
837	TALLOC_FREE(smb_fname);
838	return status;
839	}
840
841	/****************************************************************************
842	Check a filename - possibly calling check_reduced_name.
843	This is called by every routine before it allows an operation on a filename.
844	It does any final confirmation necessary to ensure that the filename is
845	a valid one for the user to access.
846	****************************************************************************/
847
848	NTSTATUS check_name(connection_struct conn, const char name)
849	{
850	if (IS_VETO_PATH(conn, name)) {
851	/* Is it not dot or dot dot. */
852	if (!((name[0] == '.') && (!name[1] \|\|
853	(name[1] == '.' && !name[2])))) {
854	DEBUG(5,("check_name: file path name %s vetoed\n",
855	name));
856	return map_nt_error_from_unix(ENOENT);
857	}
858	}
859
860	if (!lp_widelinks(SNUM(conn)) \|\| !lp_symlinks(SNUM(conn))) {
861	NTSTATUS status = check_reduced_name(conn,name);
862	if (!NT_STATUS_IS_OK(status)) {
863	DEBUG(5,("check_name: name %s failed with %s\n",name,
864	nt_errstr(status)));
865	return status;
866	}
867	}
868
869	return NT_STATUS_OK;
870	}
871
872	/****************************************************************************
873	Check if two filenames are equal.
874	This needs to be careful about whether we are case sensitive.
875	****************************************************************************/
876
877	static bool fname_equal(const char name1, const char name2,
878	bool case_sensitive)
879	{
880	/* Normal filename handling */
881	if (case_sensitive) {
882	return(strcmp(name1,name2) == 0);
883	}
884
885	return(strequal(name1,name2));
886	}
887
888	/****************************************************************************
889	Scan a directory to find a filename, matching without case sensitivity.
890	If the name looks like a mangled name then try via the mangling functions
891	****************************************************************************/
892
893	static int get_real_filename_full_scan(connection_struct *conn,
894	const char path, const char name,
895	bool mangled,
896	TALLOC_CTX mem_ctx, char *found_name)
897	{
898	struct smb_Dir *cur_dir;
899	const char *dname = NULL;
900	char *talloced = NULL;
901	char *unmangled_name = NULL;
902	long curpos;
903
904	/* handle null paths */
905	if ((path == NULL) \|\| (*path == 0)) {
906	path = ".";
907	}
908
909	/* If we have a case-sensitive filesystem, it doesn't do us any
910	* good to search for a name. If a case variation of the name was
911	* there, then the original stat(2) would have found it.
912	*/
913	if (!mangled && !(conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH)) {
914	errno = ENOENT;
915	return -1;
916	}
917
918	/*
919	* The incoming name can be mangled, and if we de-mangle it
920	* here it will not compare correctly against the filename (name2)
921	* read from the directory and then mangled by the name_to_8_3()
922	* call. We need to mangle both names or neither.
923	* (JRA).
924	*
925	* Fix for bug found by Dina Fine. If in case sensitive mode then
926	* the mangle cache is no good (3 letter extension could be wrong
927	* case - so don't demangle in this case - leave as mangled and
928	* allow the mangling of the directory entry read (which is done
929	* case insensitively) to match instead. This will lead to more
930	* false positive matches but we fail completely without it. JRA.
931	*/
932
933	if (mangled && !conn->case_sensitive) {
934	mangled = !mangle_lookup_name_from_8_3(talloc_tos(), name,
935	&unmangled_name,
936	conn->params);
937	if (!mangled) {
938	/* Name is now unmangled. */
939	name = unmangled_name;
940	}
941	}
942
943	/* open the directory */
944	if (!(cur_dir = OpenDir(talloc_tos(), conn, path, NULL, 0))) {
945	DEBUG(3,("scan dir didn't open dir [%s]\n",path));
946	TALLOC_FREE(unmangled_name);
947	return -1;
948	}
949
950	/* now scan for matching names */
951	curpos = 0;
952	while ((dname = ReadDirName(cur_dir, &curpos, NULL, &talloced))) {
953
954	/* Is it dot or dot dot. */
955	if (ISDOT(dname) \|\| ISDOTDOT(dname)) {
956	TALLOC_FREE(talloced);
957	continue;
958	}
959
960	/*
961	* At this point dname is the unmangled name.
962	* name is either mangled or not, depending on the state
963	* of the "mangled" variable. JRA.
964	*/
965
966	/*
967	* Check mangled name against mangled name, or unmangled name
968	* against unmangled name.
969	*/
970
971	if ((mangled && mangled_equal(name,dname,conn->params)) \|\|
972	fname_equal(name, dname, conn->case_sensitive)) {
973	/* we've found the file, change it's name and return */
974	*found_name = talloc_strdup(mem_ctx, dname);
975	TALLOC_FREE(unmangled_name);
976	TALLOC_FREE(cur_dir);
977	if (!*found_name) {
978	errno = ENOMEM;
979	TALLOC_FREE(talloced);
980	return -1;
981	}
982	TALLOC_FREE(talloced);
983	return 0;
984	}
985	TALLOC_FREE(talloced);
986	}
987
988	TALLOC_FREE(unmangled_name);
989	TALLOC_FREE(cur_dir);
990	errno = ENOENT;
991	return -1;
992	}
993
994	/****************************************************************************
995	Wrapper around the vfs get_real_filename and the full directory scan
996	fallback.
997	****************************************************************************/
998
999	int get_real_filename(connection_struct conn, const char path,
1000	const char name, TALLOC_CTX mem_ctx,
1001	char **found_name)
1002	{
1003	int ret;
1004	bool mangled;
1005
1006	mangled = mangle_is_mangled(name, conn->params);
1007
1008	if (mangled) {
1009	return get_real_filename_full_scan(conn, path, name, mangled,
1010	mem_ctx, found_name);
1011	}
1012
1013	/* Try the vfs first to take advantage of case-insensitive stat. */
1014	ret = SMB_VFS_GET_REAL_FILENAME(conn, path, name, mem_ctx, found_name);
1015
1016	/*
1017	* If the case-insensitive stat was successful, or returned an error
1018	* other than EOPNOTSUPP then there is no need to fall back on the
1019	* full directory scan.
1020	*/
1021	if (ret == 0 \|\| (ret == -1 && errno != EOPNOTSUPP)) {
1022	return ret;
1023	}
1024
1025	return get_real_filename_full_scan(conn, path, name, mangled, mem_ctx,
1026	found_name);
1027	}
1028
1029	static NTSTATUS build_stream_path(TALLOC_CTX *mem_ctx,
1030	connection_struct *conn,
1031	const char *orig_path,
1032	struct smb_filename *smb_fname)
1033	{
1034	NTSTATUS status;
1035	unsigned int i, num_streams;
1036	struct stream_struct *streams = NULL;
1037
1038	if (SMB_VFS_STAT(conn, smb_fname) == 0) {
1039	DEBUG(10, ("'%s' exists\n", smb_fname_str_dbg(smb_fname)));
1040	return NT_STATUS_OK;
1041	}
1042
1043	if (errno != ENOENT) {
1044	DEBUG(10, ("vfs_stat failed: %s\n", strerror(errno)));
1045	status = map_nt_error_from_unix(errno);
1046	goto fail;
1047	}
1048
1049	/* Fall back to a case-insensitive scan of all streams on the file. */
1050	status = SMB_VFS_STREAMINFO(conn, NULL, smb_fname->base_name, mem_ctx,
1051	&num_streams, &streams);
1052
1053	if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1054	SET_STAT_INVALID(smb_fname->st);
1055	return NT_STATUS_OK;
1056	}
1057
1058	if (!NT_STATUS_IS_OK(status)) {
1059	DEBUG(10, ("vfs_streaminfo failed: %s\n", nt_errstr(status)));
1060	goto fail;
1061	}
1062
1063	for (i=0; i<num_streams; i++) {
1064	DEBUG(10, ("comparing [%s] and [%s]: ",
1065	smb_fname->stream_name, streams[i].name));
1066	if (fname_equal(smb_fname->stream_name, streams[i].name,
1067	conn->case_sensitive)) {
1068	DEBUGADD(10, ("equal\n"));
1069	break;
1070	}
1071	DEBUGADD(10, ("not equal\n"));
1072	}
1073
1074	/* Couldn't find the stream. */
1075	if (i == num_streams) {
1076	SET_STAT_INVALID(smb_fname->st);
1077	TALLOC_FREE(streams);
1078	return NT_STATUS_OK;
1079	}
1080
1081	DEBUG(10, ("case insensitive stream. requested: %s, actual: %s\n",
1082	smb_fname->stream_name, streams[i].name));
1083
1084
1085	TALLOC_FREE(smb_fname->stream_name);
1086	smb_fname->stream_name = talloc_strdup(smb_fname, streams[i].name);
1087	if (smb_fname->stream_name == NULL) {
1088	status = NT_STATUS_NO_MEMORY;
1089	goto fail;
1090	}
1091
1092	SET_STAT_INVALID(smb_fname->st);
1093
1094	if (SMB_VFS_STAT(conn, smb_fname) == 0) {
1095	DEBUG(10, ("'%s' exists\n", smb_fname_str_dbg(smb_fname)));
1096	}
1097	status = NT_STATUS_OK;
1098	fail:
1099	TALLOC_FREE(streams);
1100	return status;
1101	}
1102
1103	/**
1104	* Go through all the steps to validate a filename.
1105	*
1106	* @param ctx talloc_ctx to allocate memory with.
1107	* @param conn connection struct for vfs calls.
1108	* @param dfs_path Whether this path requires dfs resolution.
1109	* @param name_in The unconverted name.
1110	* @param ucf_flags flags to pass through to unix_convert().
1111	* UCF_ALWAYS_ALLOW_WCARD_LCOMP will be OR'd in if
1112	* p_cont_wcard != NULL and is true and
1113	* UCF_COND_ALLOW_WCARD_LCOMP.
1114	* @param p_cont_wcard If not NULL, will be set to true if the dfs path
1115	* resolution detects a wildcard.
1116	* @param pp_smb_fname The final converted name will be allocated if the
1117	* return is NT_STATUS_OK.
1118	*
1119	* @return NT_STATUS_OK if all operations completed succesfully, appropriate
1120	* error otherwise.
1121	*/
1122	NTSTATUS filename_convert(TALLOC_CTX *ctx,
1123	connection_struct *conn,
1124	bool dfs_path,
1125	const char *name_in,
1126	uint32_t ucf_flags,
1127	bool *ppath_contains_wcard,
1128	struct smb_filename **pp_smb_fname)
1129	{
1130	NTSTATUS status;
1131	bool allow_wcards = (ucf_flags & (UCF_COND_ALLOW_WCARD_LCOMP\|UCF_ALWAYS_ALLOW_WCARD_LCOMP));
1132	char *fname = NULL;
1133
1134	*pp_smb_fname = NULL;
1135
1136	status = resolve_dfspath_wcard(ctx, conn,
1137	dfs_path,
1138	name_in,
1139	allow_wcards,
1140	&fname,
1141	ppath_contains_wcard);
1142	if (!NT_STATUS_IS_OK(status)) {
1143	DEBUG(10,("filename_convert: resolve_dfspath failed "
1144	"for name %s with %s\n",
1145	name_in,
1146	nt_errstr(status) ));
1147	return status;
1148	}
1149
1150	if (is_fake_file_path(name_in)) {
1151	SMB_STRUCT_STAT st;
1152	ZERO_STRUCT(st);
1153	st.st_ex_nlink = 1;
1154	status = create_synthetic_smb_fname_split(ctx,
1155	name_in,
1156	&st,
1157	pp_smb_fname);
1158	return status;
1159	}
1160
1161	/*
1162	* If the caller conditionally allows wildcard lookups, only add the
1163	* always allow if the path actually does contain a wildcard.
1164	*/
1165	if (ucf_flags & UCF_COND_ALLOW_WCARD_LCOMP &&
1166	ppath_contains_wcard != NULL && *ppath_contains_wcard) {
1167	ucf_flags \|= UCF_ALWAYS_ALLOW_WCARD_LCOMP;
1168	}
1169
1170	status = unix_convert(ctx, conn, fname, pp_smb_fname, ucf_flags);
1171	if (!NT_STATUS_IS_OK(status)) {
1172	DEBUG(10,("filename_convert: unix_convert failed "
1173	"for name %s with %s\n",
1174	fname,
1175	nt_errstr(status) ));
1176	return status;
1177	}
1178
1179	status = check_name(conn, (*pp_smb_fname)->base_name);
1180	if (!NT_STATUS_IS_OK(status)) {
1181	DEBUG(3,("filename_convert: check_name failed "
1182	"for name %s with %s\n",
1183	smb_fname_str_dbg(*pp_smb_fname),
1184	nt_errstr(status) ));
1185	TALLOC_FREE(*pp_smb_fname);
1186	return status;
1187	}
1188
1189	return status;
1190	}

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