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

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Last change on this file since 717 was 480, checked in by Silvan Scherrer, 15 years ago
Samba Server 3.5: trunk update to 3.5.4
File size: 42.0 KB

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1	/*
2	Unix SMB/CIFS implementation.
3	Directory handling routines
4	Copyright (C) Andrew Tridgell 1992-1998
5	Copyright (C) Jeremy Allison 2007
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 3 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program. If not, see <http://www.gnu.org/licenses/>.
19	*/
20
21	#include "includes.h"
22	#include "smbd/globals.h"
23
24	/*
25	This module implements directory related functions for Samba.
26	*/
27
28	/* "Special" directory offsets. */
29	#define END_OF_DIRECTORY_OFFSET ((long)-1)
30	#define START_OF_DIRECTORY_OFFSET ((long)0)
31	#define DOT_DOT_DIRECTORY_OFFSET ((long)0x80000000)
32
33	/* Make directory handle internals available. */
34
35	struct name_cache_entry {
36	char *name;
37	long offset;
38	};
39
40	struct smb_Dir {
41	connection_struct *conn;
42	SMB_STRUCT_DIR *dir;
43	long offset;
44	char *dir_path;
45	size_t name_cache_size;
46	struct name_cache_entry *name_cache;
47	unsigned int name_cache_index;
48	unsigned int file_number;
49	};
50
51	struct dptr_struct {
52	struct dptr_struct next, prev;
53	int dnum;
54	uint16 spid;
55	struct connection_struct *conn;
56	struct smb_Dir *dir_hnd;
57	bool expect_close;
58	char *wcard;
59	uint32 attr;
60	char *path;
61	bool has_wild; /* Set to true if the wcard entry has MS wildcard characters in it. */
62	bool did_stat; /* Optimisation for non-wcard searches. */
63	};
64
65
66	#define INVALID_DPTR_KEY (-3)
67
68	/****************************************************************************
69	Make a dir struct.
70	****************************************************************************/
71
72	bool make_dir_struct(TALLOC_CTX *ctx,
73	char *buf,
74	const char *mask,
75	const char *fname,
76	SMB_OFF_T size,
77	uint32 mode,
78	time_t date,
79	bool uc)
80	{
81	char *p;
82	char *mask2 = talloc_strdup(ctx, mask);
83
84	if (!mask2) {
85	return False;
86	}
87
88	if ((mode & aDIR) != 0) {
89	size = 0;
90	}
91
92	memset(buf+1,' ',11);
93	if ((p = strchr_m(mask2,'.')) != NULL) {
94	*p = 0;
95	push_ascii(buf+1,mask2,8, 0);
96	push_ascii(buf+9,p+1,3, 0);
97	*p = '.';
98	} else {
99	push_ascii(buf+1,mask2,11, 0);
100	}
101
102	memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
103	SCVAL(buf,21,mode);
104	srv_put_dos_date(buf,22,date);
105	SSVAL(buf,26,size & 0xFFFF);
106	SSVAL(buf,28,(size >> 16)&0xFFFF);
107	/* We only uppercase if FLAGS2_LONG_PATH_COMPONENTS is zero in the input buf.
108	Strange, but verified on W2K3. Needed for OS/2. JRA. */
109	push_ascii(buf+30,fname,12, uc ? STR_UPPER : 0);
110	DEBUG(8,("put name [%s] from [%s] into dir struct\n",buf+30, fname));
111	return True;
112	}
113
114	/****************************************************************************
115	Initialise the dir bitmap.
116	****************************************************************************/
117
118	bool init_dptrs(struct smbd_server_connection *sconn)
119	{
120	if (sconn->smb1.searches.dptr_bmap) {
121	return true;
122	}
123
124	sconn->smb1.searches.dptr_bmap = bitmap_allocate(MAX_DIRECTORY_HANDLES);
125
126	if (sconn->smb1.searches.dptr_bmap == NULL) {
127	return false;
128	}
129
130	return true;
131	}
132
133	/****************************************************************************
134	Idle a dptr - the directory is closed but the control info is kept.
135	****************************************************************************/
136
137	static void dptr_idle(struct dptr_struct *dptr)
138	{
139	if (dptr->dir_hnd) {
140	DEBUG(4,("Idling dptr dnum %d\n",dptr->dnum));
141	TALLOC_FREE(dptr->dir_hnd);
142	}
143	}
144
145	/****************************************************************************
146	Idle the oldest dptr.
147	****************************************************************************/
148
149	static void dptr_idleoldest(struct smbd_server_connection *sconn)
150	{
151	struct dptr_struct *dptr;
152
153	/*
154	* Go to the end of the list.
155	*/
156	for(dptr = sconn->smb1.searches.dirptrs; dptr && dptr->next; dptr = dptr->next)
157	;
158
159	if(!dptr) {
160	DEBUG(0,("No dptrs available to idle ?\n"));
161	return;
162	}
163
164	/*
165	* Idle the oldest pointer.
166	*/
167
168	for(; dptr; dptr = dptr->prev) {
169	if (dptr->dir_hnd) {
170	dptr_idle(dptr);
171	return;
172	}
173	}
174	}
175
176	/****************************************************************************
177	Get the struct dptr_struct for a dir index.
178	****************************************************************************/
179
180	static struct dptr_struct dptr_get(struct smbd_server_connection sconn,
181	int key, bool forclose)
182	{
183	struct dptr_struct *dptr;
184
185	for(dptr = sconn->smb1.searches.dirptrs; dptr; dptr = dptr->next) {
186	if(dptr->dnum == key) {
187	if (!forclose && !dptr->dir_hnd) {
188	if (sconn->smb1.searches.dirhandles_open >= MAX_OPEN_DIRECTORIES)
189	dptr_idleoldest(sconn);
190	DEBUG(4,("dptr_get: Reopening dptr key %d\n",key));
191	if (!(dptr->dir_hnd = OpenDir(
192	NULL, dptr->conn, dptr->path,
193	dptr->wcard, dptr->attr))) {
194	DEBUG(4,("dptr_get: Failed to open %s (%s)\n",dptr->path,
195	strerror(errno)));
196	return False;
197	}
198	}
199	DLIST_PROMOTE(sconn->smb1.searches.dirptrs,dptr);
200	return dptr;
201	}
202	}
203	return(NULL);
204	}
205
206	/****************************************************************************
207	Get the dir path for a dir index.
208	****************************************************************************/
209
210	char dptr_path(struct smbd_server_connection sconn, int key)
211	{
212	struct dptr_struct *dptr = dptr_get(sconn, key, false);
213	if (dptr)
214	return(dptr->path);
215	return(NULL);
216	}
217
218	/****************************************************************************
219	Get the dir wcard for a dir index.
220	****************************************************************************/
221
222	char dptr_wcard(struct smbd_server_connection sconn, int key)
223	{
224	struct dptr_struct *dptr = dptr_get(sconn, key, false);
225	if (dptr)
226	return(dptr->wcard);
227	return(NULL);
228	}
229
230	/****************************************************************************
231	Get the dir attrib for a dir index.
232	****************************************************************************/
233
234	uint16 dptr_attr(struct smbd_server_connection *sconn, int key)
235	{
236	struct dptr_struct *dptr = dptr_get(sconn, key, false);
237	if (dptr)
238	return(dptr->attr);
239	return(0);
240	}
241
242	/****************************************************************************
243	Close a dptr (internal func).
244	****************************************************************************/
245
246	static void dptr_close_internal(struct dptr_struct *dptr)
247	{
248	struct smbd_server_connection *sconn = dptr->conn->sconn;
249
250	DEBUG(4,("closing dptr key %d\n",dptr->dnum));
251
252	if (sconn == NULL) {
253	goto done;
254	}
255
256	DLIST_REMOVE(sconn->smb1.searches.dirptrs, dptr);
257
258	/*
259	* Free the dnum in the bitmap. Remember the dnum value is always
260	* biased by one with respect to the bitmap.
261	*/
262
263	if(bitmap_query(sconn->smb1.searches.dptr_bmap, dptr->dnum - 1) != true) {
264	DEBUG(0,("dptr_close_internal : Error - closing dnum = %d and bitmap not set !\n",
265	dptr->dnum ));
266	}
267
268	bitmap_clear(sconn->smb1.searches.dptr_bmap, dptr->dnum - 1);
269
270	done:
271	TALLOC_FREE(dptr->dir_hnd);
272
273	/* Lanman 2 specific code */
274	SAFE_FREE(dptr->wcard);
275	string_set(&dptr->path,"");
276	SAFE_FREE(dptr);
277	}
278
279	/****************************************************************************
280	Close a dptr given a key.
281	****************************************************************************/
282
283	void dptr_close(struct smbd_server_connection sconn, int key)
284	{
285	struct dptr_struct *dptr;
286
287	if(*key == INVALID_DPTR_KEY)
288	return;
289
290	/* OS/2 seems to use -1 to indicate "close all directories" */
291	if (*key == -1) {
292	struct dptr_struct *next;
293	for(dptr = sconn->smb1.searches.dirptrs; dptr; dptr = next) {
294	next = dptr->next;
295	dptr_close_internal(dptr);
296	}
297	*key = INVALID_DPTR_KEY;
298	return;
299	}
300
301	dptr = dptr_get(sconn, *key, true);
302
303	if (!dptr) {
304	DEBUG(0,("Invalid key %d given to dptr_close\n", *key));
305	return;
306	}
307
308	dptr_close_internal(dptr);
309
310	*key = INVALID_DPTR_KEY;
311	}
312
313	/****************************************************************************
314	Close all dptrs for a cnum.
315	****************************************************************************/
316
317	void dptr_closecnum(connection_struct *conn)
318	{
319	struct dptr_struct dptr, next;
320	struct smbd_server_connection *sconn = conn->sconn;
321
322	if (sconn == NULL) {
323	return;
324	}
325
326	for(dptr = sconn->smb1.searches.dirptrs; dptr; dptr = next) {
327	next = dptr->next;
328	if (dptr->conn == conn) {
329	dptr_close_internal(dptr);
330	}
331	}
332	}
333
334	/****************************************************************************
335	Idle all dptrs for a cnum.
336	****************************************************************************/
337
338	void dptr_idlecnum(connection_struct *conn)
339	{
340	struct dptr_struct *dptr;
341	struct smbd_server_connection *sconn = conn->sconn;
342
343	if (sconn == NULL) {
344	return;
345	}
346
347	for(dptr = sconn->smb1.searches.dirptrs; dptr; dptr = dptr->next) {
348	if (dptr->conn == conn && dptr->dir_hnd) {
349	dptr_idle(dptr);
350	}
351	}
352	}
353
354	/****************************************************************************
355	Close a dptr that matches a given path, only if it matches the spid also.
356	****************************************************************************/
357
358	void dptr_closepath(struct smbd_server_connection *sconn,
359	char *path,uint16 spid)
360	{
361	struct dptr_struct dptr, next;
362	for(dptr = sconn->smb1.searches.dirptrs; dptr; dptr = next) {
363	next = dptr->next;
364	if (spid == dptr->spid && strequal(dptr->path,path))
365	dptr_close_internal(dptr);
366	}
367	}
368
369	/****************************************************************************
370	Try and close the oldest handle not marked for
371	expect close in the hope that the client has
372	finished with that one.
373	****************************************************************************/
374
375	static void dptr_close_oldest(struct smbd_server_connection *sconn,
376	bool old)
377	{
378	struct dptr_struct *dptr;
379
380	/*
381	* Go to the end of the list.
382	*/
383	for(dptr = sconn->smb1.searches.dirptrs; dptr && dptr->next; dptr = dptr->next)
384	;
385
386	if(!dptr) {
387	DEBUG(0,("No old dptrs available to close oldest ?\n"));
388	return;
389	}
390
391	/*
392	* If 'old' is true, close the oldest oldhandle dnum (ie. 1 < dnum < 256) that
393	* does not have expect_close set. If 'old' is false, close
394	* one of the new dnum handles.
395	*/
396
397	for(; dptr; dptr = dptr->prev) {
398	if ((old && (dptr->dnum < 256) && !dptr->expect_close) \|\|
399	(!old && (dptr->dnum > 255))) {
400	dptr_close_internal(dptr);
401	return;
402	}
403	}
404	}
405
406	/****************************************************************************
407	Create a new dir ptr. If the flag old_handle is true then we must allocate
408	from the bitmap range 0 - 255 as old SMBsearch directory handles are only
409	one byte long. If old_handle is false we allocate from the range
410	256 - MAX_DIRECTORY_HANDLES. We bias the number we return by 1 to ensure
411	a directory handle is never zero.
412	wcard must not be zero.
413	****************************************************************************/
414
415	NTSTATUS dptr_create(connection_struct conn, const char path, bool old_handle, bool expect_close,uint16 spid,
416	const char wcard, bool wcard_has_wild, uint32 attr, struct dptr_struct *dptr_ret)
417	{
418	struct smbd_server_connection *sconn = conn->sconn;
419	struct dptr_struct *dptr = NULL;
420	struct smb_Dir *dir_hnd;
421	NTSTATUS status;
422
423	DEBUG(5,("dptr_create dir=%s\n", path));
424
425	if (sconn == NULL) {
426	DEBUG(0,("dptr_create: called with fake connection_struct\n"));
427	return NT_STATUS_INTERNAL_ERROR;
428	}
429
430	if (!wcard) {
431	return NT_STATUS_INVALID_PARAMETER;
432	}
433
434	status = check_name(conn,path);
435	if (!NT_STATUS_IS_OK(status)) {
436	return status;
437	}
438
439	dir_hnd = OpenDir(NULL, conn, path, wcard, attr);
440	if (!dir_hnd) {
441	return map_nt_error_from_unix(errno);
442	}
443
444	if (sconn->smb1.searches.dirhandles_open >= MAX_OPEN_DIRECTORIES) {
445	dptr_idleoldest(sconn);
446	}
447
448	dptr = SMB_MALLOC_P(struct dptr_struct);
449	if(!dptr) {
450	DEBUG(0,("malloc fail in dptr_create.\n"));
451	TALLOC_FREE(dir_hnd);
452	return NT_STATUS_NO_MEMORY;
453	}
454
455	ZERO_STRUCTP(dptr);
456
457	if(old_handle) {
458
459	/*
460	* This is an old-style SMBsearch request. Ensure the
461	* value we return will fit in the range 1-255.
462	*/
463
464	dptr->dnum = bitmap_find(sconn->smb1.searches.dptr_bmap, 0);
465
466	if(dptr->dnum == -1 \|\| dptr->dnum > 254) {
467
468	/*
469	* Try and close the oldest handle not marked for
470	* expect close in the hope that the client has
471	* finished with that one.
472	*/
473
474	dptr_close_oldest(sconn, true);
475
476	/* Now try again... */
477	dptr->dnum = bitmap_find(sconn->smb1.searches.dptr_bmap, 0);
478	if(dptr->dnum == -1 \|\| dptr->dnum > 254) {
479	DEBUG(0,("dptr_create: returned %d: Error - all old dirptrs in use ?\n", dptr->dnum));
480	SAFE_FREE(dptr);
481	TALLOC_FREE(dir_hnd);
482	return NT_STATUS_TOO_MANY_OPENED_FILES;
483	}
484	}
485	} else {
486
487	/*
488	* This is a new-style trans2 request. Allocate from
489	* a range that will return 256 - MAX_DIRECTORY_HANDLES.
490	*/
491
492	dptr->dnum = bitmap_find(sconn->smb1.searches.dptr_bmap, 255);
493
494	if(dptr->dnum == -1 \|\| dptr->dnum < 255) {
495
496	/*
497	* Try and close the oldest handle close in the hope that
498	* the client has finished with that one. This will only
499	* happen in the case of the Win98 client bug where it leaks
500	* directory handles.
501	*/
502
503	dptr_close_oldest(sconn, false);
504
505	/* Now try again... */
506	dptr->dnum = bitmap_find(sconn->smb1.searches.dptr_bmap, 255);
507
508	if(dptr->dnum == -1 \|\| dptr->dnum < 255) {
509	DEBUG(0,("dptr_create: returned %d: Error - all new dirptrs in use ?\n", dptr->dnum));
510	SAFE_FREE(dptr);
511	TALLOC_FREE(dir_hnd);
512	return NT_STATUS_TOO_MANY_OPENED_FILES;
513	}
514	}
515	}
516
517	bitmap_set(sconn->smb1.searches.dptr_bmap, dptr->dnum);
518
519	dptr->dnum += 1; /* Always bias the dnum by one - no zero dnums allowed. */
520
521	string_set(&dptr->path,path);
522	dptr->conn = conn;
523	dptr->dir_hnd = dir_hnd;
524	dptr->spid = spid;
525	dptr->expect_close = expect_close;
526	dptr->wcard = SMB_STRDUP(wcard);
527	if (!dptr->wcard) {
528	bitmap_clear(sconn->smb1.searches.dptr_bmap, dptr->dnum - 1);
529	SAFE_FREE(dptr);
530	TALLOC_FREE(dir_hnd);
531	return NT_STATUS_NO_MEMORY;
532	}
533	if (lp_posix_pathnames() \|\| (wcard[0] == '.' && wcard[1] == 0)) {
534	dptr->has_wild = True;
535	} else {
536	dptr->has_wild = wcard_has_wild;
537	}
538
539	dptr->attr = attr;
540
541	DLIST_ADD(sconn->smb1.searches.dirptrs, dptr);
542
543	DEBUG(3,("creating new dirptr %d for path %s, expect_close = %d\n",
544	dptr->dnum,path,expect_close));
545
546	*dptr_ret = dptr;
547
548	return NT_STATUS_OK;
549	}
550
551
552	/****************************************************************************
553	Wrapper functions to access the lower level directory handles.
554	****************************************************************************/
555
556	int dptr_CloseDir(struct dptr_struct *dptr)
557	{
558	dptr_close_internal(dptr);
559	return 0;
560	}
561
562	void dptr_SeekDir(struct dptr_struct *dptr, long offset)
563	{
564	SeekDir(dptr->dir_hnd, offset);
565	}
566
567	long dptr_TellDir(struct dptr_struct *dptr)
568	{
569	return TellDir(dptr->dir_hnd);
570	}
571
572	bool dptr_has_wild(struct dptr_struct *dptr)
573	{
574	return dptr->has_wild;
575	}
576
577	int dptr_dnum(struct dptr_struct *dptr)
578	{
579	return dptr->dnum;
580	}
581
582	/****************************************************************************
583	Return the next visible file name, skipping veto'd and invisible files.
584	****************************************************************************/
585
586	static const char dptr_normal_ReadDirName(struct dptr_struct dptr,
587	long poffset, SMB_STRUCT_STAT pst,
588	char **ptalloced)
589	{
590	/* Normal search for the next file. */
591	const char *name;
592	char *talloced = NULL;
593
594	while ((name = ReadDirName(dptr->dir_hnd, poffset, pst, &talloced))
595	!= NULL) {
596	if (is_visible_file(dptr->conn, dptr->path, name, pst, True)) {
597	*ptalloced = talloced;
598	return name;
599	}
600	TALLOC_FREE(talloced);
601	}
602	return NULL;
603	}
604
605	/****************************************************************************
606	Return the next visible file name, skipping veto'd and invisible files.
607	****************************************************************************/
608
609	char dptr_ReadDirName(TALLOC_CTX ctx,
610	struct dptr_struct *dptr,
611	long *poffset,
612	SMB_STRUCT_STAT *pst)
613	{
614	struct smb_filename smb_fname_base;
615	char *name = NULL;
616	const char *name_temp = NULL;
617	char *talloced = NULL;
618	char *pathreal = NULL;
619	char *found_name = NULL;
620	int ret;
621
622	SET_STAT_INVALID(*pst);
623
624	if (dptr->has_wild \|\| dptr->did_stat) {
625	name_temp = dptr_normal_ReadDirName(dptr, poffset, pst,
626	&talloced);
627	if (name_temp == NULL) {
628	return NULL;
629	}
630	if (talloced != NULL) {
631	return talloc_move(ctx, &talloced);
632	}
633	return talloc_strdup(ctx, name_temp);
634	}
635
636	/* If poffset is -1 then we know we returned this name before and we
637	* have no wildcards. We're at the end of the directory. */
638	if (*poffset == END_OF_DIRECTORY_OFFSET) {
639	return NULL;
640	}
641
642	/* We know the stored wcard contains no wildcard characters.
643	* See if we can match with a stat call. If we can't, then set
644	* did_stat to true to ensure we only do this once and keep
645	* searching. */
646
647	dptr->did_stat = true;
648
649	/* First check if it should be visible. */
650	if (!is_visible_file(dptr->conn, dptr->path, dptr->wcard,
651	pst, true))
652	{
653	/* This only returns false if the file was found, but
654	is explicitly not visible. Set us to end of
655	directory, but return NULL as we know we can't ever
656	find it. */
657	goto ret;
658	}
659
660	if (VALID_STAT(*pst)) {
661	name = talloc_strdup(ctx, dptr->wcard);
662	goto ret;
663	}
664
665	pathreal = talloc_asprintf(ctx,
666	"%s/%s",
667	dptr->path,
668	dptr->wcard);
669	if (!pathreal)
670	return NULL;
671
672	/* Create an smb_filename with stream_name == NULL. */
673	ZERO_STRUCT(smb_fname_base);
674	smb_fname_base.base_name = pathreal;
675
676	if (SMB_VFS_STAT(dptr->conn, &smb_fname_base) == 0) {
677	*pst = smb_fname_base.st;
678	name = talloc_strdup(ctx, dptr->wcard);
679	goto clean;
680	} else {
681	/* If we get any other error than ENOENT or ENOTDIR
682	then the file exists we just can't stat it. */
683	if (errno != ENOENT && errno != ENOTDIR) {
684	name = talloc_strdup(ctx, dptr->wcard);
685	goto clean;
686	}
687	}
688
689	/* Stat failed. We know this is authoratiative if we are
690	* providing case sensitive semantics or the underlying
691	* filesystem is case sensitive.
692	*/
693	if (dptr->conn->case_sensitive \|\|
694	!(dptr->conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH))
695	{
696	goto clean;
697	}
698
699	/*
700	* Try case-insensitive stat if the fs has the ability. This avoids
701	* scanning the whole directory.
702	*/
703	ret = SMB_VFS_GET_REAL_FILENAME(dptr->conn, dptr->path, dptr->wcard,
704	ctx, &found_name);
705	if (ret == 0) {
706	name = found_name;
707	goto clean;
708	} else if (errno == ENOENT) {
709	/* The case-insensitive lookup was authoritative. */
710	goto clean;
711	}
712
713	TALLOC_FREE(pathreal);
714
715	name_temp = dptr_normal_ReadDirName(dptr, poffset, pst, &talloced);
716	if (name_temp == NULL) {
717	return NULL;
718	}
719	if (talloced != NULL) {
720	return talloc_move(ctx, &talloced);
721	}
722	return talloc_strdup(ctx, name_temp);
723
724	clean:
725	TALLOC_FREE(pathreal);
726	ret:
727	/* We need to set the underlying dir_hnd offset to -1
728	* also as this function is usually called with the
729	* output from TellDir. */
730	dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
731	return name;
732	}
733
734	/****************************************************************************
735	Search for a file by name, skipping veto'ed and not visible files.
736	****************************************************************************/
737
738	bool dptr_SearchDir(struct dptr_struct dptr, const char name, long poffset, SMB_STRUCT_STAT pst)
739	{
740	SET_STAT_INVALID(*pst);
741
742	if (!dptr->has_wild && (dptr->dir_hnd->offset == END_OF_DIRECTORY_OFFSET)) {
743	/* This is a singleton directory and we're already at the end. */
744	*poffset = END_OF_DIRECTORY_OFFSET;
745	return False;
746	}
747
748	return SearchDir(dptr->dir_hnd, name, poffset);
749	}
750
751	/****************************************************************************
752	Add the name we're returning into the underlying cache.
753	****************************************************************************/
754
755	void dptr_DirCacheAdd(struct dptr_struct dptr, const char name, long offset)
756	{
757	DirCacheAdd(dptr->dir_hnd, name, offset);
758	}
759
760	/****************************************************************************
761	Initialize variables & state data at the beginning of all search SMB requests.
762	****************************************************************************/
763	void dptr_init_search_op(struct dptr_struct *dptr)
764	{
765	SMB_VFS_INIT_SEARCH_OP(dptr->conn, dptr->dir_hnd->dir);
766	}
767
768	/****************************************************************************
769	Fill the 5 byte server reserved dptr field.
770	****************************************************************************/
771
772	bool dptr_fill(struct smbd_server_connection *sconn,
773	char *buf1,unsigned int key)
774	{
775	unsigned char buf = (unsigned char )buf1;
776	struct dptr_struct *dptr = dptr_get(sconn, key, false);
777	uint32 offset;
778	if (!dptr) {
779	DEBUG(1,("filling null dirptr %d\n",key));
780	return(False);
781	}
782	offset = (uint32)TellDir(dptr->dir_hnd);
783	DEBUG(6,("fill on key %u dirptr 0x%lx now at %d\n",key,
784	(long)dptr->dir_hnd,(int)offset));
785	buf[0] = key;
786	SIVAL(buf,1,offset);
787	return(True);
788	}
789
790	/****************************************************************************
791	Fetch the dir ptr and seek it given the 5 byte server field.
792	****************************************************************************/
793
794	struct dptr_struct dptr_fetch(struct smbd_server_connection sconn,
795	char buf, int num)
796	{
797	unsigned int key = (unsigned char )buf;
798	struct dptr_struct *dptr = dptr_get(sconn, key, false);
799	uint32 offset;
800	long seekoff;
801
802	if (!dptr) {
803	DEBUG(3,("fetched null dirptr %d\n",key));
804	return(NULL);
805	}
806	*num = key;
807	offset = IVAL(buf,1);
808	if (offset == (uint32)-1) {
809	seekoff = END_OF_DIRECTORY_OFFSET;
810	} else {
811	seekoff = (long)offset;
812	}
813	SeekDir(dptr->dir_hnd,seekoff);
814	DEBUG(3,("fetching dirptr %d for path %s at offset %d\n",
815	key, dptr->path, (int)seekoff));
816	return(dptr);
817	}
818
819	/****************************************************************************
820	Fetch the dir ptr.
821	****************************************************************************/
822
823	struct dptr_struct dptr_fetch_lanman2(struct smbd_server_connection sconn,
824	int dptr_num)
825	{
826	struct dptr_struct *dptr = dptr_get(sconn, dptr_num, false);
827
828	if (!dptr) {
829	DEBUG(3,("fetched null dirptr %d\n",dptr_num));
830	return(NULL);
831	}
832	DEBUG(3,("fetching dirptr %d for path %s\n",dptr_num,dptr->path));
833	return(dptr);
834	}
835
836	/****************************************************************************
837	Check that a file matches a particular file type.
838	****************************************************************************/
839
840	bool dir_check_ftype(connection_struct *conn, uint32 mode, uint32 dirtype)
841	{
842	uint32 mask;
843
844	/* Check the "may have" search bits. */
845	if (((mode & ~dirtype) & (aHIDDEN \| aSYSTEM \| aDIR)) != 0)
846	return False;
847
848	/* Check the "must have" bits, which are the may have bits shifted eight */
849	/* If must have bit is set, the file/dir can not be returned in search unless the matching
850	file attribute is set */
851	mask = ((dirtype >> 8) & (aDIR\|aARCH\|aRONLY\|aHIDDEN\|aSYSTEM)); /* & 0x37 */
852	if(mask) {
853	if((mask & (mode & (aDIR\|aARCH\|aRONLY\|aHIDDEN\|aSYSTEM))) == mask) /* check if matching attribute present */
854	return True;
855	else
856	return False;
857	}
858
859	return True;
860	}
861
862	static bool mangle_mask_match(connection_struct *conn,
863	const char *filename,
864	const char *mask)
865	{
866	char mname[13];
867
868	if (!name_to_8_3(filename,mname,False,conn->params)) {
869	return False;
870	}
871	return mask_match_search(mname,mask,False);
872	}
873
874	bool smbd_dirptr_get_entry(TALLOC_CTX *ctx,
875	struct dptr_struct *dirptr,
876	const char *mask,
877	uint32_t dirtype,
878	bool dont_descend,
879	bool ask_sharemode,
880	bool (match_fn)(TALLOC_CTX ctx,
881	void *private_data,
882	const char *dname,
883	const char *mask,
884	char **_fname),
885	bool (mode_fn)(TALLOC_CTX ctx,
886	void *private_data,
887	struct smb_filename *smb_fname,
888	uint32_t *_mode),
889	void *private_data,
890	char **_fname,
891	struct smb_filename **_smb_fname,
892	uint32_t *_mode,
893	long *_prev_offset)
894	{
895	connection_struct *conn = dirptr->conn;
896	bool needslash;
897
898	*_smb_fname = NULL;
899	*_mode = 0;
900
901	needslash = ( dirptr->path[strlen(dirptr->path) -1] != '/');
902
903	while (true) {
904	long cur_offset;
905	long prev_offset;
906	SMB_STRUCT_STAT sbuf;
907	char *dname = NULL;
908	bool isdots;
909	char *fname = NULL;
910	char *pathreal = NULL;
911	struct smb_filename smb_fname;
912	uint32_t mode = 0;
913	bool ok;
914	NTSTATUS status;
915
916	cur_offset = dptr_TellDir(dirptr);
917	prev_offset = cur_offset;
918	dname = dptr_ReadDirName(ctx, dirptr, &cur_offset, &sbuf);
919
920	DEBUG(6,("smbd_dirptr_get_entry: dirptr 0x%lx now at offset %ld\n",
921	(long)dirptr, cur_offset));
922
923	if (dname == NULL) {
924	return false;
925	}
926
927	isdots = (ISDOT(dname) \|\| ISDOTDOT(dname));
928	if (dont_descend && !isdots) {
929	TALLOC_FREE(dname);
930	continue;
931	}
932
933	/*
934	* fname may get mangled, dname is never mangled.
935	* Whenever we're accessing the filesystem we use
936	* pathreal which is composed from dname.
937	*/
938
939	ok = match_fn(ctx, private_data, dname, mask, &fname);
940	if (!ok) {
941	TALLOC_FREE(dname);
942	continue;
943	}
944
945	pathreal = talloc_asprintf(ctx, "%s%s%s",
946	dirptr->path,
947	needslash?"/":"",
948	dname);
949	if (!pathreal) {
950	TALLOC_FREE(dname);
951	TALLOC_FREE(fname);
952	return false;
953	}
954
955	/* Create smb_fname with NULL stream_name. */
956	ZERO_STRUCT(smb_fname);
957	smb_fname.base_name = pathreal;
958	smb_fname.st = sbuf;
959
960	ok = mode_fn(ctx, private_data, &smb_fname, &mode);
961	if (!ok) {
962	TALLOC_FREE(dname);
963	TALLOC_FREE(fname);
964	TALLOC_FREE(pathreal);
965	continue;
966	}
967
968	if (!dir_check_ftype(conn, mode, dirtype)) {
969	DEBUG(5,("[%s] attribs 0x%x didn't match 0x%x\n",
970	fname, (unsigned int)mode, (unsigned int)dirtype));
971	TALLOC_FREE(dname);
972	TALLOC_FREE(fname);
973	TALLOC_FREE(pathreal);
974	continue;
975	}
976
977	if (ask_sharemode) {
978	struct timespec write_time_ts;
979	struct file_id fileid;
980
981	fileid = vfs_file_id_from_sbuf(conn,
982	&smb_fname.st);
983	get_file_infos(fileid, NULL, &write_time_ts);
984	if (!null_timespec(write_time_ts)) {
985	update_stat_ex_mtime(&smb_fname.st,
986	write_time_ts);
987	}
988	}
989
990	DEBUG(3,("smbd_dirptr_get_entry mask=[%s] found %s "
991	"fname=%s (%s)\n",
992	mask, smb_fname_str_dbg(&smb_fname),
993	dname, fname));
994
995	DirCacheAdd(dirptr->dir_hnd, dname, cur_offset);
996
997	TALLOC_FREE(dname);
998
999	status = copy_smb_filename(ctx, &smb_fname, _smb_fname);
1000	TALLOC_FREE(pathreal);
1001	if (!NT_STATUS_IS_OK(status)) {
1002	return false;
1003	}
1004	*_fname = fname;
1005	*_mode = mode;
1006	*_prev_offset = prev_offset;
1007
1008	return true;
1009	}
1010
1011	return false;
1012	}
1013
1014	/****************************************************************************
1015	Get an 8.3 directory entry.
1016	****************************************************************************/
1017
1018	static bool smbd_dirptr_8_3_match_fn(TALLOC_CTX *ctx,
1019	void *private_data,
1020	const char *dname,
1021	const char *mask,
1022	char **_fname)
1023	{
1024	connection_struct conn = (connection_struct )private_data;
1025
1026	if ((strcmp(mask,".") == 0) \|\|
1027	mask_match_search(dname, mask, false) \|\|
1028	mangle_mask_match(conn, dname, mask)) {
1029	char mname[13];
1030	const char *fname;
1031
1032	if (!mangle_is_8_3(dname, false, conn->params)) {
1033	bool ok = name_to_8_3(dname, mname, false,
1034	conn->params);
1035	if (!ok) {
1036	return false;
1037	}
1038	fname = mname;
1039	} else {
1040	fname = dname;
1041	}
1042
1043	*_fname = talloc_strdup(ctx, fname);
1044	if (*_fname == NULL) {
1045	return false;
1046	}
1047
1048	return true;
1049	}
1050
1051	return false;
1052	}
1053
1054	static bool smbd_dirptr_8_3_mode_fn(TALLOC_CTX *ctx,
1055	void *private_data,
1056	struct smb_filename *smb_fname,
1057	uint32_t *_mode)
1058	{
1059	connection_struct conn = (connection_struct )private_data;
1060
1061	if (!VALID_STAT(smb_fname->st)) {
1062	if ((SMB_VFS_STAT(conn, smb_fname)) != 0) {
1063	DEBUG(5,("smbd_dirptr_8_3_mode_fn: "
1064	"Couldn't stat [%s]. Error "
1065	"= %s\n",
1066	smb_fname_str_dbg(smb_fname),
1067	strerror(errno)));
1068	return false;
1069	}
1070	}
1071
1072	*_mode = dos_mode(conn, smb_fname);
1073	return true;
1074	}
1075
1076	bool get_dir_entry(TALLOC_CTX *ctx,
1077	struct dptr_struct *dirptr,
1078	const char *mask,
1079	uint32_t dirtype,
1080	char **_fname,
1081	SMB_OFF_T *_size,
1082	uint32_t *_mode,
1083	struct timespec *_date,
1084	bool check_descend,
1085	bool ask_sharemode)
1086	{
1087	connection_struct *conn = dirptr->conn;
1088	char *fname = NULL;
1089	struct smb_filename *smb_fname = NULL;
1090	uint32_t mode = 0;
1091	long prev_offset;
1092	bool ok;
1093
1094	ok = smbd_dirptr_get_entry(ctx,
1095	dirptr,
1096	mask,
1097	dirtype,
1098	check_descend,
1099	ask_sharemode,
1100	smbd_dirptr_8_3_match_fn,
1101	smbd_dirptr_8_3_mode_fn,
1102	conn,
1103	&fname,
1104	&smb_fname,
1105	&mode,
1106	&prev_offset);
1107	if (!ok) {
1108	return false;
1109	}
1110
1111	*_fname = talloc_move(ctx, &fname);
1112	*_size = smb_fname->st.st_ex_size;
1113	*_mode = mode;
1114	*_date = smb_fname->st.st_ex_mtime;
1115	TALLOC_FREE(smb_fname);
1116	return true;
1117	}
1118
1119	/*******************************************************************
1120	Check to see if a user can read a file. This is only approximate,
1121	it is used as part of the "hide unreadable" option. Don't
1122	use it for anything security sensitive.
1123	********************************************************************/
1124
1125	static bool user_can_read_file(connection_struct *conn,
1126	struct smb_filename *smb_fname)
1127	{
1128	/*
1129	* If user is a member of the Admin group
1130	* we never hide files from them.
1131	*/
1132
1133	if (conn->admin_user) {
1134	return True;
1135	}
1136
1137	return can_access_file_acl(conn, smb_fname, FILE_READ_DATA);
1138	}
1139
1140	/*******************************************************************
1141	Check to see if a user can write a file (and only files, we do not
1142	check dirs on this one). This is only approximate,
1143	it is used as part of the "hide unwriteable" option. Don't
1144	use it for anything security sensitive.
1145	********************************************************************/
1146
1147	static bool user_can_write_file(connection_struct *conn,
1148	const struct smb_filename *smb_fname)
1149	{
1150	/*
1151	* If user is a member of the Admin group
1152	* we never hide files from them.
1153	*/
1154
1155	if (conn->admin_user) {
1156	return True;
1157	}
1158
1159	SMB_ASSERT(VALID_STAT(smb_fname->st));
1160
1161	/* Pseudo-open the file */
1162
1163	if(S_ISDIR(smb_fname->st.st_ex_mode)) {
1164	return True;
1165	}
1166
1167	return can_write_to_file(conn, smb_fname);
1168	}
1169
1170	/*******************************************************************
1171	Is a file a "special" type ?
1172	********************************************************************/
1173
1174	static bool file_is_special(connection_struct *conn,
1175	const struct smb_filename *smb_fname)
1176	{
1177	/*
1178	* If user is a member of the Admin group
1179	* we never hide files from them.
1180	*/
1181
1182	if (conn->admin_user)
1183	return False;
1184
1185	SMB_ASSERT(VALID_STAT(smb_fname->st));
1186
1187	if (S_ISREG(smb_fname->st.st_ex_mode) \|\|
1188	S_ISDIR(smb_fname->st.st_ex_mode) \|\|
1189	S_ISLNK(smb_fname->st.st_ex_mode))
1190	return False;
1191
1192	return True;
1193	}
1194
1195	/*******************************************************************
1196	Should the file be seen by the client?
1197	NOTE: A successful return is no guarantee of the file's existence.
1198	********************************************************************/
1199
1200	bool is_visible_file(connection_struct conn, const char dir_path,
1201	const char name, SMB_STRUCT_STAT pst, bool use_veto)
1202	{
1203	bool hide_unreadable = lp_hideunreadable(SNUM(conn));
1204	bool hide_unwriteable = lp_hideunwriteable_files(SNUM(conn));
1205	bool hide_special = lp_hide_special_files(SNUM(conn));
1206	char *entry = NULL;
1207	struct smb_filename *smb_fname_base = NULL;
1208	NTSTATUS status;
1209	bool ret = false;
1210
1211	if ((strcmp(".",name) == 0) \|\| (strcmp("..",name) == 0)) {
1212	return True; /* . and .. are always visible. */
1213	}
1214
1215	/* If it's a vetoed file, pretend it doesn't even exist */
1216	if (use_veto && IS_VETO_PATH(conn, name)) {
1217	DEBUG(10,("is_visible_file: file %s is vetoed.\n", name ));
1218	return False;
1219	}
1220
1221	if (hide_unreadable \|\| hide_unwriteable \|\| hide_special) {
1222	entry = talloc_asprintf(talloc_tos(), "%s/%s", dir_path, name);
1223	if (!entry) {
1224	ret = false;
1225	goto out;
1226	}
1227
1228	/* If it's a dfs symlink, ignore _hide xxxx_ options */
1229	if (lp_host_msdfs() &&
1230	lp_msdfs_root(SNUM(conn)) &&
1231	is_msdfs_link(conn, entry, NULL)) {
1232	ret = true;
1233	goto out;
1234	}
1235
1236	/* Create an smb_filename with stream_name == NULL. */
1237	status = create_synthetic_smb_fname(talloc_tos(), entry, NULL,
1238	pst, &smb_fname_base);
1239	if (!NT_STATUS_IS_OK(status)) {
1240	ret = false;
1241	goto out;
1242	}
1243
1244	/* If the file name does not exist, there's no point checking
1245	* the configuration options. We succeed, on the basis that the
1246	* checks might have passed if the file was present.
1247	*/
1248	if (!VALID_STAT(*pst)) {
1249	if (SMB_VFS_STAT(conn, smb_fname_base) != 0) {
1250	ret = true;
1251	goto out;
1252	} else {
1253	*pst = smb_fname_base->st;
1254	}
1255	}
1256
1257	/* Honour _hide unreadable_ option */
1258	if (hide_unreadable &&
1259	!user_can_read_file(conn, smb_fname_base)) {
1260	DEBUG(10,("is_visible_file: file %s is unreadable.\n",
1261	entry ));
1262	ret = false;
1263	goto out;
1264	}
1265	/* Honour _hide unwriteable_ option */
1266	if (hide_unwriteable && !user_can_write_file(conn,
1267	smb_fname_base)) {
1268	DEBUG(10,("is_visible_file: file %s is unwritable.\n",
1269	entry ));
1270	ret = false;
1271	goto out;
1272	}
1273	/* Honour _hide_special_ option */
1274	if (hide_special && file_is_special(conn, smb_fname_base)) {
1275	DEBUG(10,("is_visible_file: file %s is special.\n",
1276	entry ));
1277	ret = false;
1278	goto out;
1279	}
1280	}
1281
1282	ret = true;
1283	out:
1284	TALLOC_FREE(smb_fname_base);
1285	TALLOC_FREE(entry);
1286	return ret;
1287	}
1288
1289	static int smb_Dir_destructor(struct smb_Dir *dirp)
1290	{
1291	if (dirp->dir) {
1292	SMB_VFS_CLOSEDIR(dirp->conn,dirp->dir);
1293	}
1294	if (dirp->conn->sconn) {
1295	dirp->conn->sconn->smb1.searches.dirhandles_open--;
1296	}
1297	return 0;
1298	}
1299
1300	/*******************************************************************
1301	Open a directory.
1302	********************************************************************/
1303
1304	struct smb_Dir OpenDir(TALLOC_CTX mem_ctx, connection_struct *conn,
1305	const char name, const char mask, uint32 attr)
1306	{
1307	struct smb_Dir *dirp = TALLOC_ZERO_P(mem_ctx, struct smb_Dir);
1308	struct smbd_server_connection *sconn = conn->sconn;
1309
1310	if (!dirp) {
1311	return NULL;
1312	}
1313
1314	dirp->conn = conn;
1315	dirp->name_cache_size = lp_directory_name_cache_size(SNUM(conn));
1316
1317	dirp->dir_path = talloc_strdup(dirp, name);
1318	if (!dirp->dir_path) {
1319	errno = ENOMEM;
1320	goto fail;
1321	}
1322
1323	if (sconn) {
1324	sconn->smb1.searches.dirhandles_open++;
1325	}
1326	talloc_set_destructor(dirp, smb_Dir_destructor);
1327
1328	dirp->dir = SMB_VFS_OPENDIR(conn, dirp->dir_path, mask, attr);
1329	if (!dirp->dir) {
1330	DEBUG(5,("OpenDir: Can't open %s. %s\n", dirp->dir_path,
1331	strerror(errno) ));
1332	goto fail;
1333	}
1334
1335	return dirp;
1336
1337	fail:
1338	TALLOC_FREE(dirp);
1339	return NULL;
1340	}
1341
1342	/*******************************************************************
1343	Read from a directory.
1344	Return directory entry, current offset, and optional stat information.
1345	Don't check for veto or invisible files.
1346	********************************************************************/
1347
1348	const char ReadDirName(struct smb_Dir dirp, long *poffset,
1349	SMB_STRUCT_STAT sbuf, char *ptalloced)
1350	{
1351	const char *n;
1352	char *talloced = NULL;
1353	connection_struct *conn = dirp->conn;
1354
1355	/* Cheat to allow . and .. to be the first entries returned. */
1356	if (((*poffset == START_OF_DIRECTORY_OFFSET) \|\|
1357	(*poffset == DOT_DOT_DIRECTORY_OFFSET)) && (dirp->file_number < 2))
1358	{
1359	if (dirp->file_number == 0) {
1360	n = ".";
1361	*poffset = dirp->offset = START_OF_DIRECTORY_OFFSET;
1362	} else {
1363	n = "..";
1364	*poffset = dirp->offset = DOT_DOT_DIRECTORY_OFFSET;
1365	}
1366	dirp->file_number++;
1367	*ptalloced = NULL;
1368	return n;
1369	} else if (*poffset == END_OF_DIRECTORY_OFFSET) {
1370	*poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1371	return NULL;
1372	} else {
1373	/* A real offset, seek to it. */
1374	SeekDir(dirp, *poffset);
1375	}
1376
1377	while ((n = vfs_readdirname(conn, dirp->dir, sbuf, &talloced))) {
1378	/* Ignore . and .. - we've already returned them. */
1379	if (*n == '.') {
1380	if ((n[1] == '\0') \|\| (n[1] == '.' && n[2] == '\0')) {
1381	TALLOC_FREE(talloced);
1382	continue;
1383	}
1384	}
1385	*poffset = dirp->offset = SMB_VFS_TELLDIR(conn, dirp->dir);
1386	*ptalloced = talloced;
1387	dirp->file_number++;
1388	return n;
1389	}
1390	*poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1391	*ptalloced = NULL;
1392	return NULL;
1393	}
1394
1395	/*******************************************************************
1396	Rewind to the start.
1397	********************************************************************/
1398
1399	void RewindDir(struct smb_Dir dirp, long poffset)
1400	{
1401	SMB_VFS_REWINDDIR(dirp->conn, dirp->dir);
1402	dirp->file_number = 0;
1403	dirp->offset = START_OF_DIRECTORY_OFFSET;
1404	*poffset = START_OF_DIRECTORY_OFFSET;
1405	}
1406
1407	/*******************************************************************
1408	Seek a dir.
1409	********************************************************************/
1410
1411	void SeekDir(struct smb_Dir *dirp, long offset)
1412	{
1413	if (offset != dirp->offset) {
1414	if (offset == START_OF_DIRECTORY_OFFSET) {
1415	RewindDir(dirp, &offset);
1416	/*
1417	* Ok we should really set the file number here
1418	* to 1 to enable ".." to be returned next. Trouble
1419	* is I'm worried about callers using SeekDir(dirp,0)
1420	* as equivalent to RewindDir(). So leave this alone
1421	* for now.
1422	*/
1423	} else if (offset == DOT_DOT_DIRECTORY_OFFSET) {
1424	RewindDir(dirp, &offset);
1425	/*
1426	* Set the file number to 2 - we want to get the first
1427	* real file entry (the one we return after "..")
1428	* on the next ReadDir.
1429	*/
1430	dirp->file_number = 2;
1431	} else if (offset == END_OF_DIRECTORY_OFFSET) {
1432	; /* Don't seek in this case. */
1433	} else {
1434	SMB_VFS_SEEKDIR(dirp->conn, dirp->dir, offset);
1435	}
1436	dirp->offset = offset;
1437	}
1438	}
1439
1440	/*******************************************************************
1441	Tell a dir position.
1442	********************************************************************/
1443
1444	long TellDir(struct smb_Dir *dirp)
1445	{
1446	return(dirp->offset);
1447	}
1448
1449	/*******************************************************************
1450	Add an entry into the dcache.
1451	********************************************************************/
1452
1453	void DirCacheAdd(struct smb_Dir dirp, const char name, long offset)
1454	{
1455	struct name_cache_entry *e;
1456
1457	if (dirp->name_cache_size == 0) {
1458	return;
1459	}
1460
1461	if (dirp->name_cache == NULL) {
1462	dirp->name_cache = TALLOC_ZERO_ARRAY(
1463	dirp, struct name_cache_entry, dirp->name_cache_size);
1464
1465	if (dirp->name_cache == NULL) {
1466	return;
1467	}
1468	}
1469
1470	dirp->name_cache_index = (dirp->name_cache_index+1) %
1471	dirp->name_cache_size;
1472	e = &dirp->name_cache[dirp->name_cache_index];
1473	TALLOC_FREE(e->name);
1474	e->name = talloc_strdup(dirp, name);
1475	e->offset = offset;
1476	}
1477
1478	/*******************************************************************
1479	Find an entry by name. Leave us at the offset after it.
1480	Don't check for veto or invisible files.
1481	********************************************************************/
1482
1483	bool SearchDir(struct smb_Dir dirp, const char name, long *poffset)
1484	{
1485	int i;
1486	const char *entry = NULL;
1487	char *talloced = NULL;
1488	connection_struct *conn = dirp->conn;
1489
1490	/* Search back in the name cache. */
1491	if (dirp->name_cache_size && dirp->name_cache) {
1492	for (i = dirp->name_cache_index; i >= 0; i--) {
1493	struct name_cache_entry *e = &dirp->name_cache[i];
1494	if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1495	*poffset = e->offset;
1496	SeekDir(dirp, e->offset);
1497	return True;
1498	}
1499	}
1500	for (i = dirp->name_cache_size - 1; i > dirp->name_cache_index; i--) {
1501	struct name_cache_entry *e = &dirp->name_cache[i];
1502	if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1503	*poffset = e->offset;
1504	SeekDir(dirp, e->offset);
1505	return True;
1506	}
1507	}
1508	}
1509
1510	/* Not found in the name cache. Rewind directory and start from scratch. */
1511	SMB_VFS_REWINDDIR(conn, dirp->dir);
1512	dirp->file_number = 0;
1513	*poffset = START_OF_DIRECTORY_OFFSET;
1514	while ((entry = ReadDirName(dirp, poffset, NULL, &talloced))) {
1515	if (conn->case_sensitive ? (strcmp(entry, name) == 0) : strequal(entry, name)) {
1516	TALLOC_FREE(talloced);
1517	return True;
1518	}
1519	TALLOC_FREE(talloced);
1520	}
1521	return False;
1522	}
1523
1524	/*****************************************************************
1525	Is this directory empty ?
1526	*****************************************************************/
1527
1528	NTSTATUS can_delete_directory(struct connection_struct *conn,
1529	const char *dirname)
1530	{
1531	NTSTATUS status = NT_STATUS_OK;
1532	long dirpos = 0;
1533	const char *dname = NULL;
1534	char *talloced = NULL;
1535	SMB_STRUCT_STAT st;
1536	struct smb_Dir *dir_hnd = OpenDir(talloc_tos(), conn, dirname,
1537	NULL, 0);
1538
1539	if (!dir_hnd) {
1540	return map_nt_error_from_unix(errno);
1541	}
1542
1543	while ((dname = ReadDirName(dir_hnd, &dirpos, &st, &talloced))) {
1544	/* Quick check for "." and ".." */
1545	if (dname[0] == '.') {
1546	if (!dname[1] \|\| (dname[1] == '.' && !dname[2])) {
1547	TALLOC_FREE(talloced);
1548	continue;
1549	}
1550	}
1551
1552	if (!is_visible_file(conn, dirname, dname, &st, True)) {
1553	TALLOC_FREE(talloced);
1554	continue;
1555	}
1556
1557	DEBUG(10,("can_delete_directory: got name %s - can't delete\n",
1558	dname ));
1559	status = NT_STATUS_DIRECTORY_NOT_EMPTY;
1560	break;
1561	}
1562	TALLOC_FREE(talloced);
1563	TALLOC_FREE(dir_hnd);
1564
1565	return status;
1566	}

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