source: trunk/samba-3.0.25pre1/source/smbd/dir.c@ 7

Last change on this file since 7 was 1, checked in by Paul Smedley, 18 years ago

Initial code import
File size: 35.7 KB
Line 
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
27extern 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#define NAME_CACHE_SIZE 100
37
38struct name_cache_entry {
39 char *name;
40 long offset;
41};
42
43struct smb_Dir {
44 connection_struct *conn;
45 SMB_STRUCT_DIR *dir;
46 long offset;
47 char *dir_path;
48 struct name_cache_entry *name_cache;
49 unsigned int name_cache_index;
50 unsigned int file_number;
51};
52
53struct dptr_struct {
54 struct dptr_struct *next, *prev;
55 int dnum;
56 uint16 spid;
57 struct connection_struct *conn;
58 struct smb_Dir *dir_hnd;
59 BOOL expect_close;
60 char *wcard;
61 uint32 attr;
62 char *path;
63 BOOL has_wild; /* Set to true if the wcard entry has MS wildcard characters in it. */
64 BOOL did_stat; /* Optimisation for non-wcard searches. */
65};
66
67static struct bitmap *dptr_bmap;
68static struct dptr_struct *dirptrs;
69static int dirhandles_open = 0;
70
71#define INVALID_DPTR_KEY (-3)
72
73/****************************************************************************
74 Make a dir struct.
75****************************************************************************/
76
77void make_dir_struct(char *buf, const char *mask, const char *fname,SMB_OFF_T size,uint32 mode,time_t date, BOOL uc)
78{
79 char *p;
80 pstring mask2;
81
82 pstrcpy(mask2,mask);
83
84 if ((mode & aDIR) != 0)
85 size = 0;
86
87 memset(buf+1,' ',11);
88 if ((p = strchr_m(mask2,'.')) != NULL) {
89 *p = 0;
90 push_ascii(buf+1,mask2,8, 0);
91 push_ascii(buf+9,p+1,3, 0);
92 *p = '.';
93 } else
94 push_ascii(buf+1,mask2,11, 0);
95
96 memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
97 SCVAL(buf,21,mode);
98 srv_put_dos_date(buf,22,date);
99 SSVAL(buf,26,size & 0xFFFF);
100 SSVAL(buf,28,(size >> 16)&0xFFFF);
101 /* We only uppercase if FLAGS2_LONG_PATH_COMPONENTS is zero in the input buf.
102 Strange, but verified on W2K3. Needed for OS/2. JRA. */
103 push_ascii(buf+30,fname,12, uc ? STR_UPPER : 0);
104 DEBUG(8,("put name [%s] from [%s] into dir struct\n",buf+30, fname));
105}
106
107/****************************************************************************
108 Initialise the dir bitmap.
109****************************************************************************/
110
111void init_dptrs(void)
112{
113 static BOOL dptrs_init=False;
114
115 if (dptrs_init)
116 return;
117
118 dptr_bmap = bitmap_allocate(MAX_DIRECTORY_HANDLES);
119
120 if (!dptr_bmap)
121 exit_server("out of memory in init_dptrs");
122
123 dptrs_init = True;
124}
125
126/****************************************************************************
127 Idle a dptr - the directory is closed but the control info is kept.
128****************************************************************************/
129
130static void dptr_idle(struct dptr_struct *dptr)
131{
132 if (dptr->dir_hnd) {
133 DEBUG(4,("Idling dptr dnum %d\n",dptr->dnum));
134 CloseDir(dptr->dir_hnd);
135 dptr->dir_hnd = NULL;
136 }
137}
138
139/****************************************************************************
140 Idle the oldest dptr.
141****************************************************************************/
142
143static void dptr_idleoldest(void)
144{
145 struct dptr_struct *dptr;
146
147 /*
148 * Go to the end of the list.
149 */
150 for(dptr = dirptrs; dptr && dptr->next; dptr = dptr->next)
151 ;
152
153 if(!dptr) {
154 DEBUG(0,("No dptrs available to idle ?\n"));
155 return;
156 }
157
158 /*
159 * Idle the oldest pointer.
160 */
161
162 for(; dptr; dptr = dptr->prev) {
163 if (dptr->dir_hnd) {
164 dptr_idle(dptr);
165 return;
166 }
167 }
168}
169
170/****************************************************************************
171 Get the struct dptr_struct for a dir index.
172****************************************************************************/
173
174static struct dptr_struct *dptr_get(int key, BOOL forclose)
175{
176 struct dptr_struct *dptr;
177
178 for(dptr = dirptrs; dptr; dptr = dptr->next) {
179 if(dptr->dnum == key) {
180 if (!forclose && !dptr->dir_hnd) {
181 if (dirhandles_open >= MAX_OPEN_DIRECTORIES)
182 dptr_idleoldest();
183 DEBUG(4,("dptr_get: Reopening dptr key %d\n",key));
184 if (!(dptr->dir_hnd = OpenDir(dptr->conn, dptr->path, dptr->wcard, dptr->attr))) {
185 DEBUG(4,("dptr_get: Failed to open %s (%s)\n",dptr->path,
186 strerror(errno)));
187 return False;
188 }
189 }
190 DLIST_PROMOTE(dirptrs,dptr);
191 return dptr;
192 }
193 }
194 return(NULL);
195}
196
197/****************************************************************************
198 Get the dir path for a dir index.
199****************************************************************************/
200
201char *dptr_path(int key)
202{
203 struct dptr_struct *dptr = dptr_get(key, False);
204 if (dptr)
205 return(dptr->path);
206 return(NULL);
207}
208
209/****************************************************************************
210 Get the dir wcard for a dir index.
211****************************************************************************/
212
213char *dptr_wcard(int key)
214{
215 struct dptr_struct *dptr = dptr_get(key, False);
216 if (dptr)
217 return(dptr->wcard);
218 return(NULL);
219}
220
221/****************************************************************************
222 Get the dir attrib for a dir index.
223****************************************************************************/
224
225uint16 dptr_attr(int key)
226{
227 struct dptr_struct *dptr = dptr_get(key, False);
228 if (dptr)
229 return(dptr->attr);
230 return(0);
231}
232
233/****************************************************************************
234 Close a dptr (internal func).
235****************************************************************************/
236
237static void dptr_close_internal(struct dptr_struct *dptr)
238{
239 DEBUG(4,("closing dptr key %d\n",dptr->dnum));
240
241 DLIST_REMOVE(dirptrs, dptr);
242
243 /*
244 * Free the dnum in the bitmap. Remember the dnum value is always
245 * biased by one with respect to the bitmap.
246 */
247
248 if(bitmap_query( dptr_bmap, dptr->dnum - 1) != True) {
249 DEBUG(0,("dptr_close_internal : Error - closing dnum = %d and bitmap not set !\n",
250 dptr->dnum ));
251 }
252
253 bitmap_clear(dptr_bmap, dptr->dnum - 1);
254
255 if (dptr->dir_hnd) {
256 CloseDir(dptr->dir_hnd);
257 }
258
259 /* Lanman 2 specific code */
260 SAFE_FREE(dptr->wcard);
261 string_set(&dptr->path,"");
262 SAFE_FREE(dptr);
263}
264
265/****************************************************************************
266 Close a dptr given a key.
267****************************************************************************/
268
269void dptr_close(int *key)
270{
271 struct dptr_struct *dptr;
272
273 if(*key == INVALID_DPTR_KEY)
274 return;
275
276 /* OS/2 seems to use -1 to indicate "close all directories" */
277 if (*key == -1) {
278 struct dptr_struct *next;
279 for(dptr = dirptrs; dptr; dptr = next) {
280 next = dptr->next;
281 dptr_close_internal(dptr);
282 }
283 *key = INVALID_DPTR_KEY;
284 return;
285 }
286
287 dptr = dptr_get(*key, True);
288
289 if (!dptr) {
290 DEBUG(0,("Invalid key %d given to dptr_close\n", *key));
291 return;
292 }
293
294 dptr_close_internal(dptr);
295
296 *key = INVALID_DPTR_KEY;
297}
298
299/****************************************************************************
300 Close all dptrs for a cnum.
301****************************************************************************/
302
303void dptr_closecnum(connection_struct *conn)
304{
305 struct dptr_struct *dptr, *next;
306 for(dptr = dirptrs; dptr; dptr = next) {
307 next = dptr->next;
308 if (dptr->conn == conn)
309 dptr_close_internal(dptr);
310 }
311}
312
313/****************************************************************************
314 Idle all dptrs for a cnum.
315****************************************************************************/
316
317void dptr_idlecnum(connection_struct *conn)
318{
319 struct dptr_struct *dptr;
320 for(dptr = dirptrs; dptr; dptr = dptr->next) {
321 if (dptr->conn == conn && dptr->dir_hnd)
322 dptr_idle(dptr);
323 }
324}
325
326/****************************************************************************
327 Close a dptr that matches a given path, only if it matches the spid also.
328****************************************************************************/
329
330void dptr_closepath(char *path,uint16 spid)
331{
332 struct dptr_struct *dptr, *next;
333 for(dptr = dirptrs; dptr; dptr = next) {
334 next = dptr->next;
335 if (spid == dptr->spid && strequal(dptr->path,path))
336 dptr_close_internal(dptr);
337 }
338}
339
340/****************************************************************************
341 Try and close the oldest handle not marked for
342 expect close in the hope that the client has
343 finished with that one.
344****************************************************************************/
345
346static void dptr_close_oldest(BOOL old)
347{
348 struct dptr_struct *dptr;
349
350 /*
351 * Go to the end of the list.
352 */
353 for(dptr = dirptrs; dptr && dptr->next; dptr = dptr->next)
354 ;
355
356 if(!dptr) {
357 DEBUG(0,("No old dptrs available to close oldest ?\n"));
358 return;
359 }
360
361 /*
362 * If 'old' is true, close the oldest oldhandle dnum (ie. 1 < dnum < 256) that
363 * does not have expect_close set. If 'old' is false, close
364 * one of the new dnum handles.
365 */
366
367 for(; dptr; dptr = dptr->prev) {
368 if ((old && (dptr->dnum < 256) && !dptr->expect_close) ||
369 (!old && (dptr->dnum > 255))) {
370 dptr_close_internal(dptr);
371 return;
372 }
373 }
374}
375
376/****************************************************************************
377 Create a new dir ptr. If the flag old_handle is true then we must allocate
378 from the bitmap range 0 - 255 as old SMBsearch directory handles are only
379 one byte long. If old_handle is false we allocate from the range
380 256 - MAX_DIRECTORY_HANDLES. We bias the number we return by 1 to ensure
381 a directory handle is never zero.
382 wcard must not be zero.
383****************************************************************************/
384
385NTSTATUS dptr_create(connection_struct *conn, pstring path, BOOL old_handle, BOOL expect_close,uint16 spid,
386 const char *wcard, BOOL wcard_has_wild, uint32 attr, struct dptr_struct **dptr_ret)
387{
388 struct dptr_struct *dptr = NULL;
389 struct smb_Dir *dir_hnd;
390 const char *dir2;
391 NTSTATUS status;
392
393 DEBUG(5,("dptr_create dir=%s\n", path));
394
395 if (!wcard) {
396 return NT_STATUS_INVALID_PARAMETER;
397 }
398
399 status = check_name(conn,path);
400 if (!NT_STATUS_IS_OK(status)) {
401 return status;
402 }
403
404 /* use a const pointer from here on */
405 dir2 = path;
406 if (!*dir2)
407 dir2 = ".";
408
409 dir_hnd = OpenDir(conn, dir2, wcard, attr);
410 if (!dir_hnd) {
411 return map_nt_error_from_unix(errno);
412 }
413
414 string_set(&conn->dirpath,dir2);
415
416 if (dirhandles_open >= MAX_OPEN_DIRECTORIES) {
417 dptr_idleoldest();
418 }
419
420 dptr = SMB_MALLOC_P(struct dptr_struct);
421 if(!dptr) {
422 DEBUG(0,("malloc fail in dptr_create.\n"));
423 CloseDir(dir_hnd);
424 return NT_STATUS_NO_MEMORY;
425 }
426
427 ZERO_STRUCTP(dptr);
428
429 if(old_handle) {
430
431 /*
432 * This is an old-style SMBsearch request. Ensure the
433 * value we return will fit in the range 1-255.
434 */
435
436 dptr->dnum = bitmap_find(dptr_bmap, 0);
437
438 if(dptr->dnum == -1 || dptr->dnum > 254) {
439
440 /*
441 * Try and close the oldest handle not marked for
442 * expect close in the hope that the client has
443 * finished with that one.
444 */
445
446 dptr_close_oldest(True);
447
448 /* Now try again... */
449 dptr->dnum = bitmap_find(dptr_bmap, 0);
450 if(dptr->dnum == -1 || dptr->dnum > 254) {
451 DEBUG(0,("dptr_create: returned %d: Error - all old dirptrs in use ?\n", dptr->dnum));
452 SAFE_FREE(dptr);
453 CloseDir(dir_hnd);
454 return NT_STATUS_TOO_MANY_OPENED_FILES;
455 }
456 }
457 } else {
458
459 /*
460 * This is a new-style trans2 request. Allocate from
461 * a range that will return 256 - MAX_DIRECTORY_HANDLES.
462 */
463
464 dptr->dnum = bitmap_find(dptr_bmap, 255);
465
466 if(dptr->dnum == -1 || dptr->dnum < 255) {
467
468 /*
469 * Try and close the oldest handle close in the hope that
470 * the client has finished with that one. This will only
471 * happen in the case of the Win98 client bug where it leaks
472 * directory handles.
473 */
474
475 dptr_close_oldest(False);
476
477 /* Now try again... */
478 dptr->dnum = bitmap_find(dptr_bmap, 255);
479
480 if(dptr->dnum == -1 || dptr->dnum < 255) {
481 DEBUG(0,("dptr_create: returned %d: Error - all new dirptrs in use ?\n", dptr->dnum));
482 SAFE_FREE(dptr);
483 CloseDir(dir_hnd);
484 return NT_STATUS_TOO_MANY_OPENED_FILES;
485 }
486 }
487 }
488
489 bitmap_set(dptr_bmap, dptr->dnum);
490
491 dptr->dnum += 1; /* Always bias the dnum by one - no zero dnums allowed. */
492
493 string_set(&dptr->path,dir2);
494 dptr->conn = conn;
495 dptr->dir_hnd = dir_hnd;
496 dptr->spid = spid;
497 dptr->expect_close = expect_close;
498 dptr->wcard = SMB_STRDUP(wcard);
499 if (!dptr->wcard) {
500 bitmap_clear(dptr_bmap, dptr->dnum - 1);
501 SAFE_FREE(dptr);
502 CloseDir(dir_hnd);
503 return NT_STATUS_NO_MEMORY;
504 }
505 if (lp_posix_pathnames() || (wcard[0] == '.' && wcard[1] == 0)) {
506 dptr->has_wild = True;
507 } else {
508 dptr->has_wild = wcard_has_wild;
509 }
510
511 dptr->attr = attr;
512
513 DLIST_ADD(dirptrs, dptr);
514
515 DEBUG(3,("creating new dirptr %d for path %s, expect_close = %d\n",
516 dptr->dnum,path,expect_close));
517
518 *dptr_ret = dptr;
519
520 return NT_STATUS_OK;
521}
522
523
524/****************************************************************************
525 Wrapper functions to access the lower level directory handles.
526****************************************************************************/
527
528int dptr_CloseDir(struct dptr_struct *dptr)
529{
530 DLIST_REMOVE(dirptrs, dptr);
531 return CloseDir(dptr->dir_hnd);
532}
533
534void dptr_SeekDir(struct dptr_struct *dptr, long offset)
535{
536 SeekDir(dptr->dir_hnd, offset);
537}
538
539long dptr_TellDir(struct dptr_struct *dptr)
540{
541 return TellDir(dptr->dir_hnd);
542}
543
544BOOL dptr_has_wild(struct dptr_struct *dptr)
545{
546 return dptr->has_wild;
547}
548
549int dptr_dnum(struct dptr_struct *dptr)
550{
551 return dptr->dnum;
552}
553
554/****************************************************************************
555 Return the next visible file name, skipping veto'd and invisible files.
556****************************************************************************/
557
558static const char *dptr_normal_ReadDirName(struct dptr_struct *dptr, long *poffset, SMB_STRUCT_STAT *pst)
559{
560 /* Normal search for the next file. */
561 const char *name;
562 while ((name = ReadDirName(dptr->dir_hnd, poffset)) != NULL) {
563 if (is_visible_file(dptr->conn, dptr->path, name, pst, True)) {
564 return name;
565 }
566 }
567 return NULL;
568}
569
570/****************************************************************************
571 Return the next visible file name, skipping veto'd and invisible files.
572****************************************************************************/
573
574const char *dptr_ReadDirName(struct dptr_struct *dptr, long *poffset, SMB_STRUCT_STAT *pst)
575{
576 SET_STAT_INVALID(*pst);
577
578 if (dptr->has_wild) {
579 return dptr_normal_ReadDirName(dptr, poffset, pst);
580 }
581
582 /* If poffset is -1 then we know we returned this name before and we have
583 no wildcards. We're at the end of the directory. */
584 if (*poffset == END_OF_DIRECTORY_OFFSET) {
585 return NULL;
586 }
587
588 if (!dptr->did_stat) {
589 pstring pathreal;
590
591 /* We know the stored wcard contains no wildcard characters. See if we can match
592 with a stat call. If we can't, then set did_stat to true to
593 ensure we only do this once and keep searching. */
594
595 dptr->did_stat = True;
596
597 /* First check if it should be visible. */
598 if (!is_visible_file(dptr->conn, dptr->path, dptr->wcard, pst, True)) {
599 /* This only returns False if the file was found, but
600 is explicitly not visible. Set us to end of directory,
601 but return NULL as we know we can't ever find it. */
602 dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
603 return NULL;
604 }
605
606 if (VALID_STAT(*pst)) {
607 /* We need to set the underlying dir_hnd offset to -1 also as
608 this function is usually called with the output from TellDir. */
609 dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
610 return dptr->wcard;
611 }
612
613 pstrcpy(pathreal,dptr->path);
614 pstrcat(pathreal,"/");
615 pstrcat(pathreal,dptr->wcard);
616
617 if (SMB_VFS_STAT(dptr->conn,pathreal,pst) == 0) {
618 /* We need to set the underlying dir_hnd offset to -1 also as
619 this function is usually called with the output from TellDir. */
620 dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
621 return dptr->wcard;
622 } else {
623 /* If we get any other error than ENOENT or ENOTDIR
624 then the file exists we just can't stat it. */
625 if (errno != ENOENT && errno != ENOTDIR) {
626 /* We need to set the underlying dir_hdn offset to -1 also as
627 this function is usually called with the output from TellDir. */
628 dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
629 return dptr->wcard;
630 }
631 }
632
633 /* In case sensitive mode we don't search - we know if it doesn't exist
634 with a stat we will fail. */
635
636 if (dptr->conn->case_sensitive) {
637 /* We need to set the underlying dir_hnd offset to -1 also as
638 this function is usually called with the output from TellDir. */
639 dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
640 return NULL;
641 }
642 }
643 return dptr_normal_ReadDirName(dptr, poffset, pst);
644}
645
646/****************************************************************************
647 Search for a file by name, skipping veto'ed and not visible files.
648****************************************************************************/
649
650BOOL dptr_SearchDir(struct dptr_struct *dptr, const char *name, long *poffset, SMB_STRUCT_STAT *pst)
651{
652 SET_STAT_INVALID(*pst);
653
654 if (!dptr->has_wild && (dptr->dir_hnd->offset == END_OF_DIRECTORY_OFFSET)) {
655 /* This is a singleton directory and we're already at the end. */
656 *poffset = END_OF_DIRECTORY_OFFSET;
657 return False;
658 }
659
660 return SearchDir(dptr->dir_hnd, name, poffset);
661}
662
663/****************************************************************************
664 Add the name we're returning into the underlying cache.
665****************************************************************************/
666
667void dptr_DirCacheAdd(struct dptr_struct *dptr, const char *name, long offset)
668{
669 DirCacheAdd(dptr->dir_hnd, name, offset);
670}
671
672/****************************************************************************
673 Fill the 5 byte server reserved dptr field.
674****************************************************************************/
675
676BOOL dptr_fill(char *buf1,unsigned int key)
677{
678 unsigned char *buf = (unsigned char *)buf1;
679 struct dptr_struct *dptr = dptr_get(key, False);
680 uint32 offset;
681 if (!dptr) {
682 DEBUG(1,("filling null dirptr %d\n",key));
683 return(False);
684 }
685 offset = (uint32)TellDir(dptr->dir_hnd);
686 DEBUG(6,("fill on key %u dirptr 0x%lx now at %d\n",key,
687 (long)dptr->dir_hnd,(int)offset));
688 buf[0] = key;
689 SIVAL(buf,1,offset);
690 return(True);
691}
692
693/****************************************************************************
694 Fetch the dir ptr and seek it given the 5 byte server field.
695****************************************************************************/
696
697struct dptr_struct *dptr_fetch(char *buf,int *num)
698{
699 unsigned int key = *(unsigned char *)buf;
700 struct dptr_struct *dptr = dptr_get(key, False);
701 uint32 offset;
702 long seekoff;
703
704 if (!dptr) {
705 DEBUG(3,("fetched null dirptr %d\n",key));
706 return(NULL);
707 }
708 *num = key;
709 offset = IVAL(buf,1);
710 if (offset == (uint32)-1) {
711 seekoff = END_OF_DIRECTORY_OFFSET;
712 } else {
713 seekoff = (long)offset;
714 }
715 SeekDir(dptr->dir_hnd,seekoff);
716 DEBUG(3,("fetching dirptr %d for path %s at offset %d\n",
717 key,dptr_path(key),(int)seekoff));
718 return(dptr);
719}
720
721/****************************************************************************
722 Fetch the dir ptr.
723****************************************************************************/
724
725struct dptr_struct *dptr_fetch_lanman2(int dptr_num)
726{
727 struct dptr_struct *dptr = dptr_get(dptr_num, False);
728
729 if (!dptr) {
730 DEBUG(3,("fetched null dirptr %d\n",dptr_num));
731 return(NULL);
732 }
733 DEBUG(3,("fetching dirptr %d for path %s\n",dptr_num,dptr_path(dptr_num)));
734 return(dptr);
735}
736
737/****************************************************************************
738 Check that a file matches a particular file type.
739****************************************************************************/
740
741BOOL dir_check_ftype(connection_struct *conn, uint32 mode, uint32 dirtype)
742{
743 uint32 mask;
744
745 /* Check the "may have" search bits. */
746 if (((mode & ~dirtype) & (aHIDDEN | aSYSTEM | aDIR)) != 0)
747 return False;
748
749 /* Check the "must have" bits, which are the may have bits shifted eight */
750 /* If must have bit is set, the file/dir can not be returned in search unless the matching
751 file attribute is set */
752 mask = ((dirtype >> 8) & (aDIR|aARCH|aRONLY|aHIDDEN|aSYSTEM)); /* & 0x37 */
753 if(mask) {
754 if((mask & (mode & (aDIR|aARCH|aRONLY|aHIDDEN|aSYSTEM))) == mask) /* check if matching attribute present */
755 return True;
756 else
757 return False;
758 }
759
760 return True;
761}
762
763static BOOL mangle_mask_match(connection_struct *conn, fstring filename, char *mask)
764{
765 mangle_map(filename,True,False,conn->params);
766 return mask_match_search(filename,mask,False);
767}
768
769/****************************************************************************
770 Get an 8.3 directory entry.
771****************************************************************************/
772
773BOOL get_dir_entry(connection_struct *conn,char *mask,uint32 dirtype, pstring fname,
774 SMB_OFF_T *size,uint32 *mode,time_t *date,BOOL check_descend)
775{
776 const char *dname;
777 BOOL found = False;
778 SMB_STRUCT_STAT sbuf;
779 pstring path;
780 pstring pathreal;
781 pstring filename;
782 BOOL needslash;
783
784 *path = *pathreal = *filename = 0;
785
786 needslash = ( conn->dirpath[strlen(conn->dirpath) -1] != '/');
787
788 if (!conn->dirptr)
789 return(False);
790
791 while (!found) {
792 long curoff = dptr_TellDir(conn->dirptr);
793 dname = dptr_ReadDirName(conn->dirptr, &curoff, &sbuf);
794
795 DEBUG(6,("readdir on dirptr 0x%lx now at offset %ld\n",
796 (long)conn->dirptr,TellDir(conn->dirptr->dir_hnd)));
797
798 if (dname == NULL)
799 return(False);
800
801 pstrcpy(filename,dname);
802
803 /* notice the special *.* handling. This appears to be the only difference
804 between the wildcard handling in this routine and in the trans2 routines.
805 see masktest for a demo
806 */
807 if ((strcmp(mask,"*.*") == 0) ||
808 mask_match_search(filename,mask,False) ||
809 mangle_mask_match(conn,filename,mask)) {
810
811 if (!mangle_is_8_3(filename, False, conn->params))
812 mangle_map(filename,True,False,
813 conn->params);
814
815 pstrcpy(fname,filename);
816 *path = 0;
817 pstrcpy(path,conn->dirpath);
818 if(needslash)
819 pstrcat(path,"/");
820 pstrcpy(pathreal,path);
821 pstrcat(path,fname);
822 pstrcat(pathreal,dname);
823 if (!VALID_STAT(sbuf) && (SMB_VFS_STAT(conn, pathreal, &sbuf)) != 0) {
824 DEBUG(5,("Couldn't stat 1 [%s]. Error = %s\n",path, strerror(errno) ));
825 continue;
826 }
827
828 *mode = dos_mode(conn,pathreal,&sbuf);
829
830 if (!dir_check_ftype(conn,*mode,dirtype)) {
831 DEBUG(5,("[%s] attribs 0x%x didn't match 0x%x\n",filename,(unsigned int)*mode,(unsigned int)dirtype));
832 continue;
833 }
834
835 *size = sbuf.st_size;
836 *date = sbuf.st_mtime;
837
838 DEBUG(3,("get_dir_entry mask=[%s] found %s fname=%s\n",mask, pathreal,fname));
839
840 found = True;
841
842 DirCacheAdd(conn->dirptr->dir_hnd, dname, curoff);
843 }
844 }
845
846 return(found);
847}
848
849/*******************************************************************
850 Check to see if a user can read a file. This is only approximate,
851 it is used as part of the "hide unreadable" option. Don't
852 use it for anything security sensitive.
853********************************************************************/
854
855static BOOL user_can_read_file(connection_struct *conn, char *name, SMB_STRUCT_STAT *pst)
856{
857 SEC_DESC *psd = NULL;
858 size_t sd_size;
859 files_struct *fsp;
860 NTSTATUS status;
861 uint32 access_granted;
862
863 /*
864 * If user is a member of the Admin group
865 * we never hide files from them.
866 */
867
868 if (conn->admin_user) {
869 return True;
870 }
871
872 /* If we can't stat it does not show it */
873 if (!VALID_STAT(*pst) && (SMB_VFS_STAT(conn, name, pst) != 0)) {
874 DEBUG(10,("user_can_read_file: SMB_VFS_STAT failed for file %s with error %s\n",
875 name, strerror(errno) ));
876 return False;
877 }
878
879 /* Pseudo-open the file (note - no fd's created). */
880
881 if(S_ISDIR(pst->st_mode)) {
882 status = open_directory(conn, name, pst,
883 READ_CONTROL_ACCESS,
884 FILE_SHARE_READ|FILE_SHARE_WRITE,
885 FILE_OPEN,
886 0, /* no create options. */
887 FILE_ATTRIBUTE_DIRECTORY,
888 NULL, &fsp);
889 } else {
890 status = open_file_stat(conn, name, pst, &fsp);
891 }
892
893 if (!NT_STATUS_IS_OK(status)) {
894 return False;
895 }
896
897 /* Get NT ACL -allocated in main loop talloc context. No free needed here. */
898 sd_size = SMB_VFS_FGET_NT_ACL(fsp, fsp->fh->fd,
899 (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION|DACL_SECURITY_INFORMATION), &psd);
900 close_file(fsp, NORMAL_CLOSE);
901
902 /* No access if SD get failed. */
903 if (!sd_size) {
904 return False;
905 }
906
907 return se_access_check(psd, current_user.nt_user_token, FILE_READ_DATA,
908 &access_granted, &status);
909}
910
911/*******************************************************************
912 Check to see if a user can write a file (and only files, we do not
913 check dirs on this one). This is only approximate,
914 it is used as part of the "hide unwriteable" option. Don't
915 use it for anything security sensitive.
916********************************************************************/
917
918static BOOL user_can_write_file(connection_struct *conn, char *name, SMB_STRUCT_STAT *pst)
919{
920 SEC_DESC *psd = NULL;
921 size_t sd_size;
922 files_struct *fsp;
923 int info;
924 NTSTATUS status;
925 uint32 access_granted;
926
927 /*
928 * If user is a member of the Admin group
929 * we never hide files from them.
930 */
931
932 if (conn->admin_user) {
933 return True;
934 }
935
936 /* If we can't stat it does not show it */
937 if (!VALID_STAT(*pst) && (SMB_VFS_STAT(conn, name, pst) != 0)) {
938 return False;
939 }
940
941 /* Pseudo-open the file */
942
943 if(S_ISDIR(pst->st_mode)) {
944 return True;
945 } else {
946 status = open_file_ntcreate(conn, name, pst,
947 FILE_WRITE_ATTRIBUTES,
948 FILE_SHARE_READ|FILE_SHARE_WRITE,
949 FILE_OPEN,
950 0,
951 FILE_ATTRIBUTE_NORMAL,
952 INTERNAL_OPEN_ONLY,
953 &info, &fsp);
954 }
955
956 if (!NT_STATUS_IS_OK(status)) {
957 return False;
958 }
959
960 /* Get NT ACL -allocated in main loop talloc context. No free needed here. */
961 sd_size = SMB_VFS_FGET_NT_ACL(fsp, fsp->fh->fd,
962 (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION|DACL_SECURITY_INFORMATION), &psd);
963 close_file(fsp, NORMAL_CLOSE);
964
965 /* No access if SD get failed. */
966 if (!sd_size)
967 return False;
968
969 return se_access_check(psd, current_user.nt_user_token, FILE_WRITE_DATA,
970 &access_granted, &status);
971}
972
973/*******************************************************************
974 Is a file a "special" type ?
975********************************************************************/
976
977static BOOL file_is_special(connection_struct *conn, char *name, SMB_STRUCT_STAT *pst)
978{
979 /*
980 * If user is a member of the Admin group
981 * we never hide files from them.
982 */
983
984 if (conn->admin_user)
985 return False;
986
987 /* If we can't stat it does not show it */
988 if (!VALID_STAT(*pst) && (SMB_VFS_STAT(conn, name, pst) != 0))
989 return True;
990
991 if (S_ISREG(pst->st_mode) || S_ISDIR(pst->st_mode) || S_ISLNK(pst->st_mode))
992 return False;
993
994 return True;
995}
996
997/*******************************************************************
998 Should the file be seen by the client ?
999********************************************************************/
1000
1001BOOL is_visible_file(connection_struct *conn, const char *dir_path, const char *name, SMB_STRUCT_STAT *pst, BOOL use_veto)
1002{
1003 BOOL hide_unreadable = lp_hideunreadable(SNUM(conn));
1004 BOOL hide_unwriteable = lp_hideunwriteable_files(SNUM(conn));
1005 BOOL hide_special = lp_hide_special_files(SNUM(conn));
1006
1007 SET_STAT_INVALID(*pst);
1008
1009 if ((strcmp(".",name) == 0) || (strcmp("..",name) == 0)) {
1010 return True; /* . and .. are always visible. */
1011 }
1012
1013 /* If it's a vetoed file, pretend it doesn't even exist */
1014 if (use_veto && IS_VETO_PATH(conn, name)) {
1015 DEBUG(10,("is_visible_file: file %s is vetoed.\n", name ));
1016 return False;
1017 }
1018
1019 if (hide_unreadable || hide_unwriteable || hide_special) {
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 /* We get away with NULL talloc ctx here as
1030 we're not interested in the link contents
1031 so we have nothing to free. */
1032 is_msdfs_link(NULL, conn, entry, NULL, NULL, NULL)) {
1033 SAFE_FREE(entry);
1034 return True;
1035 }
1036
1037 /* Honour _hide unreadable_ option */
1038 if (hide_unreadable && !user_can_read_file(conn, entry, pst)) {
1039 DEBUG(10,("is_visible_file: file %s is unreadable.\n", entry ));
1040 SAFE_FREE(entry);
1041 return False;
1042 }
1043 /* Honour _hide unwriteable_ option */
1044 if (hide_unwriteable && !user_can_write_file(conn, entry, pst)) {
1045 DEBUG(10,("is_visible_file: file %s is unwritable.\n", entry ));
1046 SAFE_FREE(entry);
1047 return False;
1048 }
1049 /* Honour _hide_special_ option */
1050 if (hide_special && file_is_special(conn, entry, pst)) {
1051 DEBUG(10,("is_visible_file: file %s is special.\n", entry ));
1052 SAFE_FREE(entry);
1053 return False;
1054 }
1055 SAFE_FREE(entry);
1056 }
1057 return True;
1058}
1059
1060/*******************************************************************
1061 Open a directory.
1062********************************************************************/
1063
1064struct smb_Dir *OpenDir(connection_struct *conn, const char *name, const char *mask, uint32 attr)
1065{
1066 struct smb_Dir *dirp = SMB_MALLOC_P(struct smb_Dir);
1067 if (!dirp) {
1068 return NULL;
1069 }
1070 ZERO_STRUCTP(dirp);
1071
1072 dirp->conn = conn;
1073
1074 dirp->dir_path = SMB_STRDUP(name);
1075 if (!dirp->dir_path) {
1076 goto fail;
1077 }
1078 dirp->dir = SMB_VFS_OPENDIR(conn, dirp->dir_path, mask, attr);
1079 if (!dirp->dir) {
1080 DEBUG(5,("OpenDir: Can't open %s. %s\n", dirp->dir_path, strerror(errno) ));
1081 goto fail;
1082 }
1083
1084 dirp->name_cache = SMB_CALLOC_ARRAY(struct name_cache_entry, NAME_CACHE_SIZE);
1085 if (!dirp->name_cache) {
1086 goto fail;
1087 }
1088
1089 dirhandles_open++;
1090 return dirp;
1091
1092 fail:
1093
1094 if (dirp) {
1095 if (dirp->dir) {
1096 SMB_VFS_CLOSEDIR(conn,dirp->dir);
1097 }
1098 SAFE_FREE(dirp->dir_path);
1099 SAFE_FREE(dirp->name_cache);
1100 SAFE_FREE(dirp);
1101 }
1102 return NULL;
1103}
1104
1105
1106/*******************************************************************
1107 Close a directory.
1108********************************************************************/
1109
1110int CloseDir(struct smb_Dir *dirp)
1111{
1112 int i, ret = 0;
1113
1114 if (dirp->dir) {
1115 ret = SMB_VFS_CLOSEDIR(dirp->conn,dirp->dir);
1116 }
1117 SAFE_FREE(dirp->dir_path);
1118 if (dirp->name_cache) {
1119 for (i = 0; i < NAME_CACHE_SIZE; i++) {
1120 SAFE_FREE(dirp->name_cache[i].name);
1121 }
1122 }
1123 SAFE_FREE(dirp->name_cache);
1124 SAFE_FREE(dirp);
1125 dirhandles_open--;
1126 return ret;
1127}
1128
1129/*******************************************************************
1130 Read from a directory. Also return current offset.
1131 Don't check for veto or invisible files.
1132********************************************************************/
1133
1134const char *ReadDirName(struct smb_Dir *dirp, long *poffset)
1135{
1136 const char *n;
1137 connection_struct *conn = dirp->conn;
1138
1139 /* Cheat to allow . and .. to be the first entries returned. */
1140 if (((*poffset == START_OF_DIRECTORY_OFFSET) || (*poffset == DOT_DOT_DIRECTORY_OFFSET)) && (dirp->file_number < 2)) {
1141 if (dirp->file_number == 0) {
1142 n = ".";
1143 *poffset = dirp->offset = START_OF_DIRECTORY_OFFSET;
1144 } else {
1145 *poffset = dirp->offset = DOT_DOT_DIRECTORY_OFFSET;
1146 n = "..";
1147 }
1148 dirp->file_number++;
1149 return n;
1150 } else if (*poffset == END_OF_DIRECTORY_OFFSET) {
1151 *poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1152 return NULL;
1153 } else {
1154 /* A real offset, seek to it. */
1155 SeekDir(dirp, *poffset);
1156 }
1157
1158 while ((n = vfs_readdirname(conn, dirp->dir))) {
1159 /* Ignore . and .. - we've already returned them. */
1160 if (*n == '.') {
1161 if ((n[1] == '\0') || (n[1] == '.' && n[2] == '\0')) {
1162 continue;
1163 }
1164 }
1165 *poffset = dirp->offset = SMB_VFS_TELLDIR(conn, dirp->dir);
1166 dirp->file_number++;
1167 return n;
1168 }
1169 *poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1170 return NULL;
1171}
1172
1173/*******************************************************************
1174 Rewind to the start.
1175********************************************************************/
1176
1177void RewindDir(struct smb_Dir *dirp, long *poffset)
1178{
1179 SMB_VFS_REWINDDIR(dirp->conn, dirp->dir);
1180 dirp->file_number = 0;
1181 dirp->offset = START_OF_DIRECTORY_OFFSET;
1182 *poffset = START_OF_DIRECTORY_OFFSET;
1183}
1184
1185/*******************************************************************
1186 Seek a dir.
1187********************************************************************/
1188
1189void SeekDir(struct smb_Dir *dirp, long offset)
1190{
1191 if (offset != dirp->offset) {
1192 if (offset == START_OF_DIRECTORY_OFFSET) {
1193 RewindDir(dirp, &offset);
1194 /*
1195 * Ok we should really set the file number here
1196 * to 1 to enable ".." to be returned next. Trouble
1197 * is I'm worried about callers using SeekDir(dirp,0)
1198 * as equivalent to RewindDir(). So leave this alone
1199 * for now.
1200 */
1201 } else if (offset == DOT_DOT_DIRECTORY_OFFSET) {
1202 RewindDir(dirp, &offset);
1203 /*
1204 * Set the file number to 2 - we want to get the first
1205 * real file entry (the one we return after "..")
1206 * on the next ReadDir.
1207 */
1208 dirp->file_number = 2;
1209 } else if (offset == END_OF_DIRECTORY_OFFSET) {
1210 ; /* Don't seek in this case. */
1211 } else {
1212 SMB_VFS_SEEKDIR(dirp->conn, dirp->dir, offset);
1213 }
1214 dirp->offset = offset;
1215 }
1216}
1217
1218/*******************************************************************
1219 Tell a dir position.
1220********************************************************************/
1221
1222long TellDir(struct smb_Dir *dirp)
1223{
1224 return(dirp->offset);
1225}
1226
1227/*******************************************************************
1228 Add an entry into the dcache.
1229********************************************************************/
1230
1231void DirCacheAdd(struct smb_Dir *dirp, const char *name, long offset)
1232{
1233 struct name_cache_entry *e;
1234
1235 dirp->name_cache_index = (dirp->name_cache_index+1) % NAME_CACHE_SIZE;
1236 e = &dirp->name_cache[dirp->name_cache_index];
1237 SAFE_FREE(e->name);
1238 e->name = SMB_STRDUP(name);
1239 e->offset = offset;
1240}
1241
1242/*******************************************************************
1243 Find an entry by name. Leave us at the offset after it.
1244 Don't check for veto or invisible files.
1245********************************************************************/
1246
1247BOOL SearchDir(struct smb_Dir *dirp, const char *name, long *poffset)
1248{
1249 int i;
1250 const char *entry;
1251 connection_struct *conn = dirp->conn;
1252
1253 /* Search back in the name cache. */
1254 for (i = dirp->name_cache_index; i >= 0; i--) {
1255 struct name_cache_entry *e = &dirp->name_cache[i];
1256 if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1257 *poffset = e->offset;
1258 SeekDir(dirp, e->offset);
1259 return True;
1260 }
1261 }
1262 for (i = NAME_CACHE_SIZE-1; i > dirp->name_cache_index; i--) {
1263 struct name_cache_entry *e = &dirp->name_cache[i];
1264 if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1265 *poffset = e->offset;
1266 SeekDir(dirp, e->offset);
1267 return True;
1268 }
1269 }
1270
1271 /* Not found in the name cache. Rewind directory and start from scratch. */
1272 SMB_VFS_REWINDDIR(conn, dirp->dir);
1273 dirp->file_number = 0;
1274 *poffset = START_OF_DIRECTORY_OFFSET;
1275 while ((entry = ReadDirName(dirp, poffset))) {
1276 if (conn->case_sensitive ? (strcmp(entry, name) == 0) : strequal(entry, name)) {
1277 return True;
1278 }
1279 }
1280 return False;
1281}
1282
1283/*****************************************************************
1284 Is this directory empty ?
1285*****************************************************************/
1286
1287NTSTATUS can_delete_directory(struct connection_struct *conn,
1288 const char *dirname)
1289{
1290 NTSTATUS status = NT_STATUS_OK;
1291 long dirpos = 0;
1292 const char *dname;
1293 struct smb_Dir *dir_hnd = OpenDir(conn, dirname, NULL, 0);
1294
1295 if (!dir_hnd) {
1296 return map_nt_error_from_unix(errno);
1297 }
1298
1299 while ((dname = ReadDirName(dir_hnd,&dirpos))) {
1300 SMB_STRUCT_STAT st;
1301
1302 /* Quick check for "." and ".." */
1303 if (dname[0] == '.') {
1304 if (!dname[1] || (dname[1] == '.' && !dname[2])) {
1305 continue;
1306 }
1307 }
1308
1309 if (!is_visible_file(conn, dirname, dname, &st, True)) {
1310 continue;
1311 }
1312
1313 DEBUG(10,("can_delete_directory: got name %s - can't delete\n", dname ));
1314 status = NT_STATUS_DIRECTORY_NOT_EMPTY;
1315 break;
1316 }
1317 CloseDir(dir_hnd);
1318
1319 return status;
1320}
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