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source: branches/samba-3.0/source/smbd/dir.c@ 635

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Last change on this file since 635 was 71, checked in by Paul Smedley, 18 years ago
Update source to 3.0.26a
File size: 37.2 KB

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1	/*
2	Unix SMB/CIFS implementation.
3	Directory handling routines
4	Copyright (C) Andrew Tridgell 1992-1998
5
6	This program is free software; you can redistribute it and/or modify
7	it under the terms of the GNU General Public License as published by
8	the Free Software Foundation; either version 2 of the License, or
9	(at your option) any later version.
10
11	This program is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.
15
16	You should have received a copy of the GNU General Public License
17	along with this program; if not, write to the Free Software
18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19	*/
20
21	#include "includes.h"
22
23	/*
24	This module implements directory related functions for Samba.
25	*/
26
27	extern struct current_user current_user;
28
29	/* "Special" directory offsets. */
30	#define END_OF_DIRECTORY_OFFSET ((long)-1)
31	#define START_OF_DIRECTORY_OFFSET ((long)0)
32	#define DOT_DOT_DIRECTORY_OFFSET ((long)0x80000000)
33
34	/* Make directory handle internals available. */
35
36	struct name_cache_entry {
37	char *name;
38	long offset;
39	};
40
41	struct smb_Dir {
42	connection_struct *conn;
43	SMB_STRUCT_DIR *dir;
44	long offset;
45	char *dir_path;
46	size_t name_cache_size;
47	struct name_cache_entry *name_cache;
48	unsigned int name_cache_index;
49	unsigned int file_number;
50	};
51
52	struct dptr_struct {
53	struct dptr_struct next, prev;
54	int dnum;
55	uint16 spid;
56	struct connection_struct *conn;
57	struct smb_Dir *dir_hnd;
58	BOOL expect_close;
59	char *wcard;
60	uint32 attr;
61	char *path;
62	BOOL has_wild; /* Set to true if the wcard entry has MS wildcard characters in it. */
63	BOOL did_stat; /* Optimisation for non-wcard searches. */
64	};
65
66	static struct bitmap *dptr_bmap;
67	static struct dptr_struct *dirptrs;
68	static int dirhandles_open = 0;
69
70	#define INVALID_DPTR_KEY (-3)
71
72	/****************************************************************************
73	Make a dir struct.
74	****************************************************************************/
75
76	void make_dir_struct(char buf, const char mask, const char *fname,SMB_OFF_T size,uint32 mode,time_t date, BOOL uc)
77	{
78	char *p;
79	pstring mask2;
80
81	pstrcpy(mask2,mask);
82
83	if ((mode & aDIR) != 0)
84	size = 0;
85
86	memset(buf+1,' ',11);
87	if ((p = strchr_m(mask2,'.')) != NULL) {
88	*p = 0;
89	push_ascii(buf+1,mask2,8, 0);
90	push_ascii(buf+9,p+1,3, 0);
91	*p = '.';
92	} else
93	push_ascii(buf+1,mask2,11, 0);
94
95	memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
96	SCVAL(buf,21,mode);
97	srv_put_dos_date(buf,22,date);
98	SSVAL(buf,26,size & 0xFFFF);
99	SSVAL(buf,28,(size >> 16)&0xFFFF);
100	/* We only uppercase if FLAGS2_LONG_PATH_COMPONENTS is zero in the input buf.
101	Strange, but verified on W2K3. Needed for OS/2. JRA. */
102	push_ascii(buf+30,fname,12, uc ? STR_UPPER : 0);
103	DEBUG(8,("put name [%s] from [%s] into dir struct\n",buf+30, fname));
104	}
105
106	/****************************************************************************
107	Initialise the dir bitmap.
108	****************************************************************************/
109
110	void init_dptrs(void)
111	{
112	static BOOL dptrs_init=False;
113
114	if (dptrs_init)
115	return;
116
117	dptr_bmap = bitmap_allocate(MAX_DIRECTORY_HANDLES);
118
119	if (!dptr_bmap)
120	exit_server("out of memory in init_dptrs");
121
122	dptrs_init = True;
123	}
124
125	/****************************************************************************
126	Idle a dptr - the directory is closed but the control info is kept.
127	****************************************************************************/
128
129	static void dptr_idle(struct dptr_struct *dptr)
130	{
131	if (dptr->dir_hnd) {
132	DEBUG(4,("Idling dptr dnum %d\n",dptr->dnum));
133	CloseDir(dptr->dir_hnd);
134	dptr->dir_hnd = NULL;
135	}
136	}
137
138	/****************************************************************************
139	Idle the oldest dptr.
140	****************************************************************************/
141
142	static void dptr_idleoldest(void)
143	{
144	struct dptr_struct *dptr;
145
146	/*
147	* Go to the end of the list.
148	*/
149	for(dptr = dirptrs; dptr && dptr->next; dptr = dptr->next)
150	;
151
152	if(!dptr) {
153	DEBUG(0,("No dptrs available to idle ?\n"));
154	return;
155	}
156
157	/*
158	* Idle the oldest pointer.
159	*/
160
161	for(; dptr; dptr = dptr->prev) {
162	if (dptr->dir_hnd) {
163	dptr_idle(dptr);
164	return;
165	}
166	}
167	}
168
169	/****************************************************************************
170	Get the struct dptr_struct for a dir index.
171	****************************************************************************/
172
173	static struct dptr_struct *dptr_get(int key, BOOL forclose)
174	{
175	struct dptr_struct *dptr;
176
177	for(dptr = dirptrs; dptr; dptr = dptr->next) {
178	if(dptr->dnum == key) {
179	if (!forclose && !dptr->dir_hnd) {
180	if (dirhandles_open >= MAX_OPEN_DIRECTORIES)
181	dptr_idleoldest();
182	DEBUG(4,("dptr_get: Reopening dptr key %d\n",key));
183	if (!(dptr->dir_hnd = OpenDir(dptr->conn, dptr->path, dptr->wcard, dptr->attr))) {
184	DEBUG(4,("dptr_get: Failed to open %s (%s)\n",dptr->path,
185	strerror(errno)));
186	return False;
187	}
188	}
189	DLIST_PROMOTE(dirptrs,dptr);
190	return dptr;
191	}
192	}
193	return(NULL);
194	}
195
196	/****************************************************************************
197	Get the dir path for a dir index.
198	****************************************************************************/
199
200	char *dptr_path(int key)
201	{
202	struct dptr_struct *dptr = dptr_get(key, False);
203	if (dptr)
204	return(dptr->path);
205	return(NULL);
206	}
207
208	/****************************************************************************
209	Get the dir wcard for a dir index.
210	****************************************************************************/
211
212	char *dptr_wcard(int key)
213	{
214	struct dptr_struct *dptr = dptr_get(key, False);
215	if (dptr)
216	return(dptr->wcard);
217	return(NULL);
218	}
219
220	/****************************************************************************
221	Get the dir attrib for a dir index.
222	****************************************************************************/
223
224	uint16 dptr_attr(int key)
225	{
226	struct dptr_struct *dptr = dptr_get(key, False);
227	if (dptr)
228	return(dptr->attr);
229	return(0);
230	}
231
232	/****************************************************************************
233	Close a dptr (internal func).
234	****************************************************************************/
235
236	static void dptr_close_internal(struct dptr_struct *dptr)
237	{
238	DEBUG(4,("closing dptr key %d\n",dptr->dnum));
239
240	DLIST_REMOVE(dirptrs, dptr);
241
242	/*
243	* Free the dnum in the bitmap. Remember the dnum value is always
244	* biased by one with respect to the bitmap.
245	*/
246
247	if(bitmap_query( dptr_bmap, dptr->dnum - 1) != True) {
248	DEBUG(0,("dptr_close_internal : Error - closing dnum = %d and bitmap not set !\n",
249	dptr->dnum ));
250	}
251
252	bitmap_clear(dptr_bmap, dptr->dnum - 1);
253
254	if (dptr->dir_hnd) {
255	CloseDir(dptr->dir_hnd);
256	}
257
258	/* Lanman 2 specific code */
259	SAFE_FREE(dptr->wcard);
260	string_set(&dptr->path,"");
261	SAFE_FREE(dptr);
262	}
263
264	/****************************************************************************
265	Close a dptr given a key.
266	****************************************************************************/
267
268	void dptr_close(int *key)
269	{
270	struct dptr_struct *dptr;
271
272	if(*key == INVALID_DPTR_KEY)
273	return;
274
275	/* OS/2 seems to use -1 to indicate "close all directories" */
276	if (*key == -1) {
277	struct dptr_struct *next;
278	for(dptr = dirptrs; dptr; dptr = next) {
279	next = dptr->next;
280	dptr_close_internal(dptr);
281	}
282	*key = INVALID_DPTR_KEY;
283	return;
284	}
285
286	dptr = dptr_get(*key, True);
287
288	if (!dptr) {
289	DEBUG(0,("Invalid key %d given to dptr_close\n", *key));
290	return;
291	}
292
293	dptr_close_internal(dptr);
294
295	*key = INVALID_DPTR_KEY;
296	}
297
298	/****************************************************************************
299	Close all dptrs for a cnum.
300	****************************************************************************/
301
302	void dptr_closecnum(connection_struct *conn)
303	{
304	struct dptr_struct dptr, next;
305	for(dptr = dirptrs; dptr; dptr = next) {
306	next = dptr->next;
307	if (dptr->conn == conn)
308	dptr_close_internal(dptr);
309	}
310	}
311
312	/****************************************************************************
313	Idle all dptrs for a cnum.
314	****************************************************************************/
315
316	void dptr_idlecnum(connection_struct *conn)
317	{
318	struct dptr_struct *dptr;
319	for(dptr = dirptrs; dptr; dptr = dptr->next) {
320	if (dptr->conn == conn && dptr->dir_hnd)
321	dptr_idle(dptr);
322	}
323	}
324
325	/****************************************************************************
326	Close a dptr that matches a given path, only if it matches the spid also.
327	****************************************************************************/
328
329	void dptr_closepath(char *path,uint16 spid)
330	{
331	struct dptr_struct dptr, next;
332	for(dptr = dirptrs; dptr; dptr = next) {
333	next = dptr->next;
334	if (spid == dptr->spid && strequal(dptr->path,path))
335	dptr_close_internal(dptr);
336	}
337	}
338
339	/****************************************************************************
340	Try and close the oldest handle not marked for
341	expect close in the hope that the client has
342	finished with that one.
343	****************************************************************************/
344
345	static void dptr_close_oldest(BOOL old)
346	{
347	struct dptr_struct *dptr;
348
349	/*
350	* Go to the end of the list.
351	*/
352	for(dptr = dirptrs; dptr && dptr->next; dptr = dptr->next)
353	;
354
355	if(!dptr) {
356	DEBUG(0,("No old dptrs available to close oldest ?\n"));
357	return;
358	}
359
360	/*
361	* If 'old' is true, close the oldest oldhandle dnum (ie. 1 < dnum < 256) that
362	* does not have expect_close set. If 'old' is false, close
363	* one of the new dnum handles.
364	*/
365
366	for(; dptr; dptr = dptr->prev) {
367	if ((old && (dptr->dnum < 256) && !dptr->expect_close) \|\|
368	(!old && (dptr->dnum > 255))) {
369	dptr_close_internal(dptr);
370	return;
371	}
372	}
373	}
374
375	/****************************************************************************
376	Create a new dir ptr. If the flag old_handle is true then we must allocate
377	from the bitmap range 0 - 255 as old SMBsearch directory handles are only
378	one byte long. If old_handle is false we allocate from the range
379	256 - MAX_DIRECTORY_HANDLES. We bias the number we return by 1 to ensure
380	a directory handle is never zero.
381	wcard must not be zero.
382	****************************************************************************/
383
384	NTSTATUS dptr_create(connection_struct *conn, pstring path, BOOL old_handle, BOOL expect_close,uint16 spid,
385	const char wcard, BOOL wcard_has_wild, uint32 attr, struct dptr_struct *dptr_ret)
386	{
387	struct dptr_struct *dptr = NULL;
388	struct smb_Dir *dir_hnd;
389	const char *dir2;
390	NTSTATUS status;
391
392	DEBUG(5,("dptr_create dir=%s\n", path));
393
394	if (!wcard) {
395	return NT_STATUS_INVALID_PARAMETER;
396	}
397
398	status = check_name(conn,path);
399	if (!NT_STATUS_IS_OK(status)) {
400	return status;
401	}
402
403	/* use a const pointer from here on */
404	dir2 = path;
405	if (!*dir2)
406	dir2 = ".";
407
408	dir_hnd = OpenDir(conn, dir2, wcard, attr);
409	if (!dir_hnd) {
410	return map_nt_error_from_unix(errno);
411	}
412
413	string_set(&conn->dirpath,dir2);
414
415	if (dirhandles_open >= MAX_OPEN_DIRECTORIES) {
416	dptr_idleoldest();
417	}
418
419	dptr = SMB_MALLOC_P(struct dptr_struct);
420	if(!dptr) {
421	DEBUG(0,("malloc fail in dptr_create.\n"));
422	CloseDir(dir_hnd);
423	return NT_STATUS_NO_MEMORY;
424	}
425
426	ZERO_STRUCTP(dptr);
427
428	if(old_handle) {
429
430	/*
431	* This is an old-style SMBsearch request. Ensure the
432	* value we return will fit in the range 1-255.
433	*/
434
435	dptr->dnum = bitmap_find(dptr_bmap, 0);
436
437	if(dptr->dnum == -1 \|\| dptr->dnum > 254) {
438
439	/*
440	* Try and close the oldest handle not marked for
441	* expect close in the hope that the client has
442	* finished with that one.
443	*/
444
445	dptr_close_oldest(True);
446
447	/* Now try again... */
448	dptr->dnum = bitmap_find(dptr_bmap, 0);
449	if(dptr->dnum == -1 \|\| dptr->dnum > 254) {
450	DEBUG(0,("dptr_create: returned %d: Error - all old dirptrs in use ?\n", dptr->dnum));
451	SAFE_FREE(dptr);
452	CloseDir(dir_hnd);
453	return NT_STATUS_TOO_MANY_OPENED_FILES;
454	}
455	}
456	} else {
457
458	/*
459	* This is a new-style trans2 request. Allocate from
460	* a range that will return 256 - MAX_DIRECTORY_HANDLES.
461	*/
462
463	dptr->dnum = bitmap_find(dptr_bmap, 255);
464
465	if(dptr->dnum == -1 \|\| dptr->dnum < 255) {
466
467	/*
468	* Try and close the oldest handle close in the hope that
469	* the client has finished with that one. This will only
470	* happen in the case of the Win98 client bug where it leaks
471	* directory handles.
472	*/
473
474	dptr_close_oldest(False);
475
476	/* Now try again... */
477	dptr->dnum = bitmap_find(dptr_bmap, 255);
478
479	if(dptr->dnum == -1 \|\| dptr->dnum < 255) {
480	DEBUG(0,("dptr_create: returned %d: Error - all new dirptrs in use ?\n", dptr->dnum));
481	SAFE_FREE(dptr);
482	CloseDir(dir_hnd);
483	return NT_STATUS_TOO_MANY_OPENED_FILES;
484	}
485	}
486	}
487
488	bitmap_set(dptr_bmap, dptr->dnum);
489
490	dptr->dnum += 1; /* Always bias the dnum by one - no zero dnums allowed. */
491
492	string_set(&dptr->path,dir2);
493	dptr->conn = conn;
494	dptr->dir_hnd = dir_hnd;
495	dptr->spid = spid;
496	dptr->expect_close = expect_close;
497	dptr->wcard = SMB_STRDUP(wcard);
498	if (!dptr->wcard) {
499	bitmap_clear(dptr_bmap, dptr->dnum - 1);
500	SAFE_FREE(dptr);
501	CloseDir(dir_hnd);
502	return NT_STATUS_NO_MEMORY;
503	}
504	if (lp_posix_pathnames() \|\| (wcard[0] == '.' && wcard[1] == 0)) {
505	dptr->has_wild = True;
506	} else {
507	dptr->has_wild = wcard_has_wild;
508	}
509
510	dptr->attr = attr;
511
512	DLIST_ADD(dirptrs, dptr);
513
514	DEBUG(3,("creating new dirptr %d for path %s, expect_close = %d\n",
515	dptr->dnum,path,expect_close));
516
517	*dptr_ret = dptr;
518
519	return NT_STATUS_OK;
520	}
521
522
523	/****************************************************************************
524	Wrapper functions to access the lower level directory handles.
525	****************************************************************************/
526
527	int dptr_CloseDir(struct dptr_struct *dptr)
528	{
529	DLIST_REMOVE(dirptrs, dptr);
530	return CloseDir(dptr->dir_hnd);
531	}
532
533	void dptr_SeekDir(struct dptr_struct *dptr, long offset)
534	{
535	SeekDir(dptr->dir_hnd, offset);
536	}
537
538	long dptr_TellDir(struct dptr_struct *dptr)
539	{
540	return TellDir(dptr->dir_hnd);
541	}
542
543	BOOL dptr_has_wild(struct dptr_struct *dptr)
544	{
545	return dptr->has_wild;
546	}
547
548	int dptr_dnum(struct dptr_struct *dptr)
549	{
550	return dptr->dnum;
551	}
552
553	/****************************************************************************
554	Return the next visible file name, skipping veto'd and invisible files.
555	****************************************************************************/
556
557	static const char dptr_normal_ReadDirName(struct dptr_struct dptr, long poffset, SMB_STRUCT_STAT pst)
558	{
559	/* Normal search for the next file. */
560	const char *name;
561	while ((name = ReadDirName(dptr->dir_hnd, poffset)) != NULL) {
562	if (is_visible_file(dptr->conn, dptr->path, name, pst, True)) {
563	return name;
564	}
565	}
566	return NULL;
567	}
568
569	/****************************************************************************
570	Return the next visible file name, skipping veto'd and invisible files.
571	****************************************************************************/
572
573	const char dptr_ReadDirName(struct dptr_struct dptr, long poffset, SMB_STRUCT_STAT pst)
574	{
575	SET_STAT_INVALID(*pst);
576
577	if (dptr->has_wild) {
578	return dptr_normal_ReadDirName(dptr, poffset, pst);
579	}
580
581	/* If poffset is -1 then we know we returned this name before and we have
582	no wildcards. We're at the end of the directory. */
583	if (*poffset == END_OF_DIRECTORY_OFFSET) {
584	return NULL;
585	}
586
587	if (!dptr->did_stat) {
588	pstring pathreal;
589
590	/* We know the stored wcard contains no wildcard characters. See if we can match
591	with a stat call. If we can't, then set did_stat to true to
592	ensure we only do this once and keep searching. */
593
594	dptr->did_stat = True;
595
596	/* First check if it should be visible. */
597	if (!is_visible_file(dptr->conn, dptr->path, dptr->wcard, pst, True)) {
598	/* This only returns False if the file was found, but
599	is explicitly not visible. Set us to end of directory,
600	but return NULL as we know we can't ever find it. */
601	dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
602	return NULL;
603	}
604
605	if (VALID_STAT(*pst)) {
606	/* We need to set the underlying dir_hnd offset to -1 also as
607	this function is usually called with the output from TellDir. */
608	dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
609	return dptr->wcard;
610	}
611
612	pstrcpy(pathreal,dptr->path);
613	pstrcat(pathreal,"/");
614	pstrcat(pathreal,dptr->wcard);
615
616	if (SMB_VFS_STAT(dptr->conn,pathreal,pst) == 0) {
617	/* We need to set the underlying dir_hnd offset to -1 also as
618	this function is usually called with the output from TellDir. */
619	dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
620	return dptr->wcard;
621	} else {
622	/* If we get any other error than ENOENT or ENOTDIR
623	then the file exists we just can't stat it. */
624	if (errno != ENOENT && errno != ENOTDIR) {
625	/* We need to set the underlying dir_hdn offset to -1 also as
626	this function is usually called with the output from TellDir. */
627	dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
628	return dptr->wcard;
629	}
630	}
631
632	/* In case sensitive mode we don't search - we know if it doesn't exist
633	with a stat we will fail. */
634
635	if (dptr->conn->case_sensitive) {
636	/* We need to set the underlying dir_hnd offset to -1 also as
637	this function is usually called with the output from TellDir. */
638	dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
639	return NULL;
640	}
641	}
642	return dptr_normal_ReadDirName(dptr, poffset, pst);
643	}
644
645	/****************************************************************************
646	Search for a file by name, skipping veto'ed and not visible files.
647	****************************************************************************/
648
649	BOOL dptr_SearchDir(struct dptr_struct dptr, const char name, long poffset, SMB_STRUCT_STAT pst)
650	{
651	SET_STAT_INVALID(*pst);
652
653	if (!dptr->has_wild && (dptr->dir_hnd->offset == END_OF_DIRECTORY_OFFSET)) {
654	/* This is a singleton directory and we're already at the end. */
655	*poffset = END_OF_DIRECTORY_OFFSET;
656	return False;
657	}
658
659	return SearchDir(dptr->dir_hnd, name, poffset);
660	}
661
662	/****************************************************************************
663	Add the name we're returning into the underlying cache.
664	****************************************************************************/
665
666	void dptr_DirCacheAdd(struct dptr_struct dptr, const char name, long offset)
667	{
668	DirCacheAdd(dptr->dir_hnd, name, offset);
669	}
670
671	/****************************************************************************
672	Fill the 5 byte server reserved dptr field.
673	****************************************************************************/
674
675	BOOL dptr_fill(char *buf1,unsigned int key)
676	{
677	unsigned char buf = (unsigned char )buf1;
678	struct dptr_struct *dptr = dptr_get(key, False);
679	uint32 offset;
680	if (!dptr) {
681	DEBUG(1,("filling null dirptr %d\n",key));
682	return(False);
683	}
684	offset = (uint32)TellDir(dptr->dir_hnd);
685	DEBUG(6,("fill on key %u dirptr 0x%lx now at %d\n",key,
686	(long)dptr->dir_hnd,(int)offset));
687	buf[0] = key;
688	SIVAL(buf,1,offset);
689	return(True);
690	}
691
692	/****************************************************************************
693	Fetch the dir ptr and seek it given the 5 byte server field.
694	****************************************************************************/
695
696	struct dptr_struct dptr_fetch(char buf,int *num)
697	{
698	unsigned int key = (unsigned char )buf;
699	struct dptr_struct *dptr = dptr_get(key, False);
700	uint32 offset;
701	long seekoff;
702
703	if (!dptr) {
704	DEBUG(3,("fetched null dirptr %d\n",key));
705	return(NULL);
706	}
707	*num = key;
708	offset = IVAL(buf,1);
709	if (offset == (uint32)-1) {
710	seekoff = END_OF_DIRECTORY_OFFSET;
711	} else {
712	seekoff = (long)offset;
713	}
714	SeekDir(dptr->dir_hnd,seekoff);
715	DEBUG(3,("fetching dirptr %d for path %s at offset %d\n",
716	key,dptr_path(key),(int)seekoff));
717	return(dptr);
718	}
719
720	/****************************************************************************
721	Fetch the dir ptr.
722	****************************************************************************/
723
724	struct dptr_struct *dptr_fetch_lanman2(int dptr_num)
725	{
726	struct dptr_struct *dptr = dptr_get(dptr_num, False);
727
728	if (!dptr) {
729	DEBUG(3,("fetched null dirptr %d\n",dptr_num));
730	return(NULL);
731	}
732	DEBUG(3,("fetching dirptr %d for path %s\n",dptr_num,dptr_path(dptr_num)));
733	return(dptr);
734	}
735
736	/****************************************************************************
737	Check that a file matches a particular file type.
738	****************************************************************************/
739
740	BOOL dir_check_ftype(connection_struct *conn, uint32 mode, uint32 dirtype)
741	{
742	uint32 mask;
743
744	/* Check the "may have" search bits. */
745	if (((mode & ~dirtype) & (aHIDDEN \| aSYSTEM \| aDIR)) != 0)
746	return False;
747
748	/* Check the "must have" bits, which are the may have bits shifted eight */
749	/* If must have bit is set, the file/dir can not be returned in search unless the matching
750	file attribute is set */
751	mask = ((dirtype >> 8) & (aDIR\|aARCH\|aRONLY\|aHIDDEN\|aSYSTEM)); /* & 0x37 */
752	if(mask) {
753	if((mask & (mode & (aDIR\|aARCH\|aRONLY\|aHIDDEN\|aSYSTEM))) == mask) /* check if matching attribute present */
754	return True;
755	else
756	return False;
757	}
758
759	return True;
760	}
761
762	static BOOL mangle_mask_match(connection_struct conn, fstring filename, char mask)
763	{
764	mangle_map(filename,True,False,conn->params);
765	return mask_match_search(filename,mask,False);
766	}
767
768	/****************************************************************************
769	Get an 8.3 directory entry.
770	****************************************************************************/
771
772	BOOL get_dir_entry(connection_struct conn,char mask,uint32 dirtype, pstring fname,
773	SMB_OFF_T size,uint32 mode,time_t *date,BOOL check_descend)
774	{
775	const char *dname;
776	BOOL found = False;
777	SMB_STRUCT_STAT sbuf;
778	pstring path;
779	pstring pathreal;
780	pstring filename;
781	BOOL needslash;
782
783	path = pathreal = *filename = 0;
784
785	needslash = ( conn->dirpath[strlen(conn->dirpath) -1] != '/');
786
787	if (!conn->dirptr)
788	return(False);
789
790	while (!found) {
791	long curoff = dptr_TellDir(conn->dirptr);
792	dname = dptr_ReadDirName(conn->dirptr, &curoff, &sbuf);
793
794	DEBUG(6,("readdir on dirptr 0x%lx now at offset %ld\n",
795	(long)conn->dirptr,TellDir(conn->dirptr->dir_hnd)));
796
797	if (dname == NULL)
798	return(False);
799
800	pstrcpy(filename,dname);
801
802	/* notice the special . handling. This appears to be the only difference
803	between the wildcard handling in this routine and in the trans2 routines.
804	see masktest for a demo
805	*/
806	if ((strcmp(mask,".") == 0) \|\|
807	mask_match_search(filename,mask,False) \|\|
808	mangle_mask_match(conn,filename,mask)) {
809
810	if (!mangle_is_8_3(filename, False, conn->params))
811	mangle_map(filename,True,False,
812	conn->params);
813
814	pstrcpy(fname,filename);
815	*path = 0;
816	pstrcpy(path,conn->dirpath);
817	if(needslash)
818	pstrcat(path,"/");
819	pstrcpy(pathreal,path);
820	pstrcat(path,fname);
821	pstrcat(pathreal,dname);
822	if (!VALID_STAT(sbuf) && (SMB_VFS_STAT(conn, pathreal, &sbuf)) != 0) {
823	DEBUG(5,("Couldn't stat 1 [%s]. Error = %s\n",path, strerror(errno) ));
824	continue;
825	}
826
827	*mode = dos_mode(conn,pathreal,&sbuf);
828
829	if (!dir_check_ftype(conn,*mode,dirtype)) {
830	DEBUG(5,("[%s] attribs 0x%x didn't match 0x%x\n",filename,(unsigned int)*mode,(unsigned int)dirtype));
831	continue;
832	}
833
834	*size = sbuf.st_size;
835	*date = sbuf.st_mtime;
836
837	DEBUG(3,("get_dir_entry mask=[%s] found %s fname=%s\n",mask, pathreal,fname));
838
839	found = True;
840
841	DirCacheAdd(conn->dirptr->dir_hnd, dname, curoff);
842	}
843	}
844
845	return(found);
846	}
847
848	/*******************************************************************
849	Check to see if a user can read a file. This is only approximate,
850	it is used as part of the "hide unreadable" option. Don't
851	use it for anything security sensitive.
852	********************************************************************/
853
854	static BOOL user_can_read_file(connection_struct conn, char name, SMB_STRUCT_STAT *pst)
855	{
856	SEC_DESC *psd = NULL;
857	size_t sd_size;
858	files_struct *fsp;
859	NTSTATUS status;
860	uint32 access_granted;
861
862	/*
863	* If user is a member of the Admin group
864	* we never hide files from them.
865	*/
866
867	if (conn->admin_user) {
868	return True;
869	}
870
871	/* If we can't stat it does not show it */
872	if (!VALID_STAT(*pst) && (SMB_VFS_STAT(conn, name, pst) != 0)) {
873	DEBUG(10,("user_can_read_file: SMB_VFS_STAT failed for file %s with error %s\n",
874	name, strerror(errno) ));
875	return False;
876	}
877
878	/* Pseudo-open the file (note - no fd's created). */
879
880	if(S_ISDIR(pst->st_mode)) {
881	status = open_directory(conn, name, pst,
882	READ_CONTROL_ACCESS,
883	FILE_SHARE_READ\|FILE_SHARE_WRITE,
884	FILE_OPEN,
885	0, /* no create options. */
886	FILE_ATTRIBUTE_DIRECTORY,
887	NULL, &fsp);
888	} else {
889	status = open_file_stat(conn, name, pst, &fsp);
890	}
891
892	if (!NT_STATUS_IS_OK(status)) {
893	return False;
894	}
895
896	/* Get NT ACL -allocated in main loop talloc context. No free needed here. */
897	sd_size = SMB_VFS_FGET_NT_ACL(fsp, fsp->fh->fd,
898	(OWNER_SECURITY_INFORMATION\|GROUP_SECURITY_INFORMATION\|DACL_SECURITY_INFORMATION), &psd);
899	close_file(fsp, NORMAL_CLOSE);
900
901	/* No access if SD get failed. */
902	if (!sd_size) {
903	return False;
904	}
905
906	return se_access_check(psd, current_user.nt_user_token, FILE_READ_DATA,
907	&access_granted, &status);
908	}
909
910	/*******************************************************************
911	Check to see if a user can write a file (and only files, we do not
912	check dirs on this one). This is only approximate,
913	it is used as part of the "hide unwriteable" option. Don't
914	use it for anything security sensitive.
915	********************************************************************/
916
917	static BOOL user_can_write_file(connection_struct conn, char name, SMB_STRUCT_STAT *pst)
918	{
919	SEC_DESC *psd = NULL;
920	size_t sd_size;
921	files_struct *fsp;
922	int info;
923	NTSTATUS status;
924	uint32 access_granted;
925
926	/*
927	* If user is a member of the Admin group
928	* we never hide files from them.
929	*/
930
931	if (conn->admin_user) {
932	return True;
933	}
934
935	/* If we can't stat it does not show it */
936	if (!VALID_STAT(*pst) && (SMB_VFS_STAT(conn, name, pst) != 0)) {
937	return False;
938	}
939
940	/* Pseudo-open the file */
941
942	if(S_ISDIR(pst->st_mode)) {
943	return True;
944	} else {
945	status = open_file_ntcreate(conn, name, pst,
946	FILE_WRITE_ATTRIBUTES,
947	FILE_SHARE_READ\|FILE_SHARE_WRITE,
948	FILE_OPEN,
949	0,
950	FILE_ATTRIBUTE_NORMAL,
951	INTERNAL_OPEN_ONLY,
952	&info, &fsp);
953	}
954
955	if (!NT_STATUS_IS_OK(status)) {
956	return False;
957	}
958
959	/* Get NT ACL -allocated in main loop talloc context. No free needed here. */
960	sd_size = SMB_VFS_FGET_NT_ACL(fsp, fsp->fh->fd,
961	(OWNER_SECURITY_INFORMATION\|GROUP_SECURITY_INFORMATION\|DACL_SECURITY_INFORMATION), &psd);
962	close_file(fsp, NORMAL_CLOSE);
963
964	/* No access if SD get failed. */
965	if (!sd_size)
966	return False;
967
968	return se_access_check(psd, current_user.nt_user_token, FILE_WRITE_DATA,
969	&access_granted, &status);
970	}
971
972	/*******************************************************************
973	Is a file a "special" type ?
974	********************************************************************/
975
976	static BOOL file_is_special(connection_struct conn, char name, SMB_STRUCT_STAT *pst)
977	{
978	/*
979	* If user is a member of the Admin group
980	* we never hide files from them.
981	*/
982
983	if (conn->admin_user)
984	return False;
985
986	/* If we can't stat it does not show it */
987	if (!VALID_STAT(*pst) && (SMB_VFS_STAT(conn, name, pst) != 0))
988	return True;
989
990	if (S_ISREG(pst->st_mode) \|\| S_ISDIR(pst->st_mode) \|\| S_ISLNK(pst->st_mode))
991	return False;
992
993	return True;
994	}
995
996	/*******************************************************************
997	Should the file be seen by the client ?
998	********************************************************************/
999
1000	BOOL is_visible_file(connection_struct conn, const char dir_path, const char name, SMB_STRUCT_STAT pst, BOOL use_veto)
1001	{
1002	BOOL hide_unreadable = lp_hideunreadable(SNUM(conn));
1003	BOOL hide_unwriteable = lp_hideunwriteable_files(SNUM(conn));
1004	BOOL hide_special = lp_hide_special_files(SNUM(conn));
1005
1006	SET_STAT_INVALID(*pst);
1007
1008	if ((strcmp(".",name) == 0) \|\| (strcmp("..",name) == 0)) {
1009	return True; /* . and .. are always visible. */
1010	}
1011
1012	/* If it's a vetoed file, pretend it doesn't even exist */
1013	if (use_veto && IS_VETO_PATH(conn, name)) {
1014	DEBUG(10,("is_visible_file: file %s is vetoed.\n", name ));
1015	return False;
1016	}
1017
1018	if (hide_unreadable \|\| hide_unwriteable \|\| hide_special) {
1019	pstring link_target;
1020	char *entry = NULL;
1021
1022	if (asprintf(&entry, "%s/%s", dir_path, name) == -1) {
1023	return False;
1024	}
1025
1026	/* If it's a dfs symlink, ignore _hide xxxx_ options */
1027	if (lp_host_msdfs() &&
1028	lp_msdfs_root(SNUM(conn)) &&
1029	is_msdfs_link(conn, entry, link_target, NULL)) {
1030	SAFE_FREE(entry);
1031	return True;
1032	}
1033
1034	/* Honour _hide unreadable_ option */
1035	if (hide_unreadable && !user_can_read_file(conn, entry, pst)) {
1036	DEBUG(10,("is_visible_file: file %s is unreadable.\n", entry ));
1037	SAFE_FREE(entry);
1038	return False;
1039	}
1040	/* Honour _hide unwriteable_ option */
1041	if (hide_unwriteable && !user_can_write_file(conn, entry, pst)) {
1042	DEBUG(10,("is_visible_file: file %s is unwritable.\n", entry ));
1043	SAFE_FREE(entry);
1044	return False;
1045	}
1046	/* Honour _hide_special_ option */
1047	if (hide_special && file_is_special(conn, entry, pst)) {
1048	DEBUG(10,("is_visible_file: file %s is special.\n", entry ));
1049	SAFE_FREE(entry);
1050	return False;
1051	}
1052	SAFE_FREE(entry);
1053	}
1054	return True;
1055	}
1056
1057	/*******************************************************************
1058	Open a directory.
1059	********************************************************************/
1060
1061	struct smb_Dir OpenDir(connection_struct conn, const char name, const char mask, uint32 attr)
1062	{
1063	struct smb_Dir *dirp = SMB_MALLOC_P(struct smb_Dir);
1064
1065	if (!dirp) {
1066	return NULL;
1067	}
1068	ZERO_STRUCTP(dirp);
1069
1070	dirp->conn = conn;
1071	dirp->name_cache_size = lp_directory_name_cache_size(SNUM(conn));
1072
1073	dirp->dir_path = SMB_STRDUP(name);
1074	if (!dirp->dir_path) {
1075	goto fail;
1076	}
1077	dirp->dir = SMB_VFS_OPENDIR(conn, dirp->dir_path, mask, attr);
1078	if (!dirp->dir) {
1079	DEBUG(5,("OpenDir: Can't open %s. %s\n", dirp->dir_path, strerror(errno) ));
1080	goto fail;
1081	}
1082
1083	if (dirp->name_cache_size) {
1084	dirp->name_cache = SMB_CALLOC_ARRAY(struct name_cache_entry,
1085	dirp->name_cache_size);
1086	if (!dirp->name_cache) {
1087	goto fail;
1088	}
1089	} else {
1090	dirp->name_cache = NULL;
1091	}
1092
1093	dirhandles_open++;
1094	return dirp;
1095
1096	fail:
1097
1098	if (dirp) {
1099	if (dirp->dir) {
1100	SMB_VFS_CLOSEDIR(conn,dirp->dir);
1101	}
1102	SAFE_FREE(dirp->dir_path);
1103	SAFE_FREE(dirp->name_cache);
1104	SAFE_FREE(dirp);
1105	}
1106	return NULL;
1107	}
1108
1109
1110	/*******************************************************************
1111	Close a directory.
1112	********************************************************************/
1113
1114	int CloseDir(struct smb_Dir *dirp)
1115	{
1116	int i, ret = 0;
1117
1118	if (dirp->dir) {
1119	ret = SMB_VFS_CLOSEDIR(dirp->conn,dirp->dir);
1120	}
1121	SAFE_FREE(dirp->dir_path);
1122	if (dirp->name_cache) {
1123	for (i = 0; i < dirp->name_cache_size; i++) {
1124	SAFE_FREE(dirp->name_cache[i].name);
1125	}
1126	}
1127	SAFE_FREE(dirp->name_cache);
1128	SAFE_FREE(dirp);
1129	dirhandles_open--;
1130	return ret;
1131	}
1132
1133	/*******************************************************************
1134	Read from a directory. Also return current offset.
1135	Don't check for veto or invisible files.
1136	********************************************************************/
1137
1138	const char ReadDirName(struct smb_Dir dirp, long *poffset)
1139	{
1140	const char *n;
1141	connection_struct *conn = dirp->conn;
1142
1143	/* Cheat to allow . and .. to be the first entries returned. */
1144	if (((poffset == START_OF_DIRECTORY_OFFSET) \|\| (poffset == DOT_DOT_DIRECTORY_OFFSET)) && (dirp->file_number < 2)) {
1145	if (dirp->file_number == 0) {
1146	n = ".";
1147	*poffset = dirp->offset = START_OF_DIRECTORY_OFFSET;
1148	} else {
1149	*poffset = dirp->offset = DOT_DOT_DIRECTORY_OFFSET;
1150	n = "..";
1151	}
1152	dirp->file_number++;
1153	return n;
1154	} else if (*poffset == END_OF_DIRECTORY_OFFSET) {
1155	*poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1156	return NULL;
1157	} else {
1158	/* A real offset, seek to it. */
1159	SeekDir(dirp, *poffset);
1160	}
1161
1162	while ((n = vfs_readdirname(conn, dirp->dir))) {
1163	/* Ignore . and .. - we've already returned them. */
1164	if (*n == '.') {
1165	if ((n[1] == '\0') \|\| (n[1] == '.' && n[2] == '\0')) {
1166	continue;
1167	}
1168	}
1169	*poffset = dirp->offset = SMB_VFS_TELLDIR(conn, dirp->dir);
1170	dirp->file_number++;
1171	return n;
1172	}
1173	*poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1174	return NULL;
1175	}
1176
1177	/*******************************************************************
1178	Rewind to the start.
1179	********************************************************************/
1180
1181	void RewindDir(struct smb_Dir dirp, long poffset)
1182	{
1183	SMB_VFS_REWINDDIR(dirp->conn, dirp->dir);
1184	dirp->file_number = 0;
1185	dirp->offset = START_OF_DIRECTORY_OFFSET;
1186	*poffset = START_OF_DIRECTORY_OFFSET;
1187	}
1188
1189	/*******************************************************************
1190	Seek a dir.
1191	********************************************************************/
1192
1193	void SeekDir(struct smb_Dir *dirp, long offset)
1194	{
1195	if (offset != dirp->offset) {
1196	if (offset == START_OF_DIRECTORY_OFFSET) {
1197	RewindDir(dirp, &offset);
1198	/*
1199	* Ok we should really set the file number here
1200	* to 1 to enable ".." to be returned next. Trouble
1201	* is I'm worried about callers using SeekDir(dirp,0)
1202	* as equivalent to RewindDir(). So leave this alone
1203	* for now.
1204	*/
1205	} else if (offset == DOT_DOT_DIRECTORY_OFFSET) {
1206	RewindDir(dirp, &offset);
1207	/*
1208	* Set the file number to 2 - we want to get the first
1209	* real file entry (the one we return after "..")
1210	* on the next ReadDir.
1211	*/
1212	dirp->file_number = 2;
1213	} else if (offset == END_OF_DIRECTORY_OFFSET) {
1214	; /* Don't seek in this case. */
1215	} else {
1216	SMB_VFS_SEEKDIR(dirp->conn, dirp->dir, offset);
1217	}
1218	dirp->offset = offset;
1219	}
1220	}
1221
1222	/*******************************************************************
1223	Tell a dir position.
1224	********************************************************************/
1225
1226	long TellDir(struct smb_Dir *dirp)
1227	{
1228	return(dirp->offset);
1229	}
1230
1231	/*******************************************************************
1232	Add an entry into the dcache.
1233	********************************************************************/
1234
1235	void DirCacheAdd(struct smb_Dir dirp, const char name, long offset)
1236	{
1237	struct name_cache_entry *e;
1238
1239	if (!dirp->name_cache_size \|\| !dirp->name_cache) {
1240	return;
1241	}
1242
1243	dirp->name_cache_index = (dirp->name_cache_index+1) %
1244	dirp->name_cache_size;
1245	e = &dirp->name_cache[dirp->name_cache_index];
1246	SAFE_FREE(e->name);
1247	e->name = SMB_STRDUP(name);
1248	e->offset = offset;
1249	}
1250
1251	/*******************************************************************
1252	Find an entry by name. Leave us at the offset after it.
1253	Don't check for veto or invisible files.
1254	********************************************************************/
1255
1256	BOOL SearchDir(struct smb_Dir dirp, const char name, long *poffset)
1257	{
1258	int i;
1259	const char *entry;
1260	connection_struct *conn = dirp->conn;
1261
1262	/* Search back in the name cache. */
1263	if (dirp->name_cache_size && dirp->name_cache) {
1264	for (i = dirp->name_cache_index; i >= 0; i--) {
1265	struct name_cache_entry *e = &dirp->name_cache[i];
1266	if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1267	*poffset = e->offset;
1268	SeekDir(dirp, e->offset);
1269	return True;
1270	}
1271	}
1272	for (i = dirp->name_cache_size - 1; i > dirp->name_cache_index; i--) {
1273	struct name_cache_entry *e = &dirp->name_cache[i];
1274	if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1275	*poffset = e->offset;
1276	SeekDir(dirp, e->offset);
1277	return True;
1278	}
1279	}
1280	}
1281
1282	/* Not found in the name cache. Rewind directory and start from scratch. */
1283	SMB_VFS_REWINDDIR(conn, dirp->dir);
1284	dirp->file_number = 0;
1285	*poffset = START_OF_DIRECTORY_OFFSET;
1286	while ((entry = ReadDirName(dirp, poffset))) {
1287	if (conn->case_sensitive ? (strcmp(entry, name) == 0) : strequal(entry, name)) {
1288	return True;
1289	}
1290	}
1291	return False;
1292	}
1293
1294	/*****************************************************************
1295	Is this directory empty ?
1296	*****************************************************************/
1297
1298	NTSTATUS can_delete_directory(struct connection_struct *conn,
1299	const char *dirname)
1300	{
1301	NTSTATUS status = NT_STATUS_OK;
1302	long dirpos = 0;
1303	const char *dname;
1304	struct smb_Dir *dir_hnd = OpenDir(conn, dirname, NULL, 0);
1305
1306	if (!dir_hnd) {
1307	return map_nt_error_from_unix(errno);
1308	}
1309
1310	while ((dname = ReadDirName(dir_hnd,&dirpos))) {
1311	SMB_STRUCT_STAT st;
1312
1313	/* Quick check for "." and ".." */
1314	if (dname[0] == '.') {
1315	if (!dname[1] \|\| (dname[1] == '.' && !dname[2])) {
1316	continue;
1317	}
1318	}
1319
1320	if (!is_visible_file(conn, dirname, dname, &st, True)) {
1321	continue;
1322	}
1323
1324	DEBUG(10,("can_delete_directory: got name %s - can't delete\n", dname ));
1325	status = NT_STATUS_DIRECTORY_NOT_EMPTY;
1326	break;
1327	}
1328	CloseDir(dir_hnd);
1329
1330	return status;
1331	}

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