2 Unix SMB/CIFS implementation.
3 Directory handling routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2007
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.
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.
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/>.
22 #include "smbd/globals.h"
25 This module implements directory related functions for Samba.
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)
33 /* Make directory handle internals available. */
35 struct name_cache_entry {
41 connection_struct *conn;
45 size_t name_cache_size;
46 struct name_cache_entry *name_cache;
47 unsigned int name_cache_index;
48 unsigned int file_number;
52 struct dptr_struct *next, *prev;
55 struct connection_struct *conn;
56 struct smb_Dir *dir_hnd;
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. */
66 #define INVALID_DPTR_KEY (-3)
68 /****************************************************************************
70 ****************************************************************************/
72 bool make_dir_struct(TALLOC_CTX *ctx,
82 char *mask2 = talloc_strdup(ctx, mask);
88 if ((mode & aDIR) != 0) {
93 if ((p = strchr_m(mask2,'.')) != NULL) {
95 push_ascii(buf+1,mask2,8, 0);
96 push_ascii(buf+9,p+1,3, 0);
99 push_ascii(buf+1,mask2,11, 0);
102 memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
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));
114 /****************************************************************************
115 Initialise the dir bitmap.
116 ****************************************************************************/
118 void init_dptrs(void)
123 dptr_bmap = bitmap_allocate(MAX_DIRECTORY_HANDLES);
126 exit_server("out of memory in init_dptrs");
129 /****************************************************************************
130 Idle a dptr - the directory is closed but the control info is kept.
131 ****************************************************************************/
133 static void dptr_idle(struct dptr_struct *dptr)
136 DEBUG(4,("Idling dptr dnum %d\n",dptr->dnum));
137 TALLOC_FREE(dptr->dir_hnd);
141 /****************************************************************************
142 Idle the oldest dptr.
143 ****************************************************************************/
145 static void dptr_idleoldest(void)
147 struct dptr_struct *dptr;
150 * Go to the end of the list.
152 for(dptr = dirptrs; dptr && dptr->next; dptr = dptr->next)
156 DEBUG(0,("No dptrs available to idle ?\n"));
161 * Idle the oldest pointer.
164 for(; dptr; dptr = dptr->prev) {
172 /****************************************************************************
173 Get the struct dptr_struct for a dir index.
174 ****************************************************************************/
176 static struct dptr_struct *dptr_get(int key, bool forclose)
178 struct dptr_struct *dptr;
180 for(dptr = dirptrs; dptr; dptr = dptr->next) {
181 if(dptr->dnum == key) {
182 if (!forclose && !dptr->dir_hnd) {
183 if (dirhandles_open >= MAX_OPEN_DIRECTORIES)
185 DEBUG(4,("dptr_get: Reopening dptr key %d\n",key));
186 if (!(dptr->dir_hnd = OpenDir(
187 NULL, dptr->conn, dptr->path,
188 dptr->wcard, dptr->attr))) {
189 DEBUG(4,("dptr_get: Failed to open %s (%s)\n",dptr->path,
194 DLIST_PROMOTE(dirptrs,dptr);
201 /****************************************************************************
202 Get the dir path for a dir index.
203 ****************************************************************************/
205 char *dptr_path(int key)
207 struct dptr_struct *dptr = dptr_get(key, False);
213 /****************************************************************************
214 Get the dir wcard for a dir index.
215 ****************************************************************************/
217 char *dptr_wcard(int key)
219 struct dptr_struct *dptr = dptr_get(key, False);
225 /****************************************************************************
226 Get the dir attrib for a dir index.
227 ****************************************************************************/
229 uint16 dptr_attr(int key)
231 struct dptr_struct *dptr = dptr_get(key, False);
237 /****************************************************************************
238 Close a dptr (internal func).
239 ****************************************************************************/
241 static void dptr_close_internal(struct dptr_struct *dptr)
243 DEBUG(4,("closing dptr key %d\n",dptr->dnum));
245 DLIST_REMOVE(dirptrs, dptr);
248 * Free the dnum in the bitmap. Remember the dnum value is always
249 * biased by one with respect to the bitmap.
252 if(bitmap_query( dptr_bmap, dptr->dnum - 1) != True) {
253 DEBUG(0,("dptr_close_internal : Error - closing dnum = %d and bitmap not set !\n",
257 bitmap_clear(dptr_bmap, dptr->dnum - 1);
259 TALLOC_FREE(dptr->dir_hnd);
261 /* Lanman 2 specific code */
262 SAFE_FREE(dptr->wcard);
263 string_set(&dptr->path,"");
267 /****************************************************************************
268 Close a dptr given a key.
269 ****************************************************************************/
271 void dptr_close(int *key)
273 struct dptr_struct *dptr;
275 if(*key == INVALID_DPTR_KEY)
278 /* OS/2 seems to use -1 to indicate "close all directories" */
280 struct dptr_struct *next;
281 for(dptr = dirptrs; dptr; dptr = next) {
283 dptr_close_internal(dptr);
285 *key = INVALID_DPTR_KEY;
289 dptr = dptr_get(*key, True);
292 DEBUG(0,("Invalid key %d given to dptr_close\n", *key));
296 dptr_close_internal(dptr);
298 *key = INVALID_DPTR_KEY;
301 /****************************************************************************
302 Close all dptrs for a cnum.
303 ****************************************************************************/
305 void dptr_closecnum(connection_struct *conn)
307 struct dptr_struct *dptr, *next;
308 for(dptr = dirptrs; dptr; dptr = next) {
310 if (dptr->conn == conn)
311 dptr_close_internal(dptr);
315 /****************************************************************************
316 Idle all dptrs for a cnum.
317 ****************************************************************************/
319 void dptr_idlecnum(connection_struct *conn)
321 struct dptr_struct *dptr;
322 for(dptr = dirptrs; dptr; dptr = dptr->next) {
323 if (dptr->conn == conn && dptr->dir_hnd)
328 /****************************************************************************
329 Close a dptr that matches a given path, only if it matches the spid also.
330 ****************************************************************************/
332 void dptr_closepath(char *path,uint16 spid)
334 struct dptr_struct *dptr, *next;
335 for(dptr = dirptrs; dptr; dptr = next) {
337 if (spid == dptr->spid && strequal(dptr->path,path))
338 dptr_close_internal(dptr);
342 /****************************************************************************
343 Try and close the oldest handle not marked for
344 expect close in the hope that the client has
345 finished with that one.
346 ****************************************************************************/
348 static void dptr_close_oldest(bool old)
350 struct dptr_struct *dptr;
353 * Go to the end of the list.
355 for(dptr = dirptrs; dptr && dptr->next; dptr = dptr->next)
359 DEBUG(0,("No old dptrs available to close oldest ?\n"));
364 * If 'old' is true, close the oldest oldhandle dnum (ie. 1 < dnum < 256) that
365 * does not have expect_close set. If 'old' is false, close
366 * one of the new dnum handles.
369 for(; dptr; dptr = dptr->prev) {
370 if ((old && (dptr->dnum < 256) && !dptr->expect_close) ||
371 (!old && (dptr->dnum > 255))) {
372 dptr_close_internal(dptr);
378 /****************************************************************************
379 Create a new dir ptr. If the flag old_handle is true then we must allocate
380 from the bitmap range 0 - 255 as old SMBsearch directory handles are only
381 one byte long. If old_handle is false we allocate from the range
382 256 - MAX_DIRECTORY_HANDLES. We bias the number we return by 1 to ensure
383 a directory handle is never zero.
384 wcard must not be zero.
385 ****************************************************************************/
387 NTSTATUS dptr_create(connection_struct *conn, const char *path, bool old_handle, bool expect_close,uint16 spid,
388 const char *wcard, bool wcard_has_wild, uint32 attr, struct dptr_struct **dptr_ret)
390 struct dptr_struct *dptr = NULL;
391 struct smb_Dir *dir_hnd;
394 DEBUG(5,("dptr_create dir=%s\n", path));
397 return NT_STATUS_INVALID_PARAMETER;
400 status = check_name(conn,path);
401 if (!NT_STATUS_IS_OK(status)) {
405 dir_hnd = OpenDir(NULL, conn, path, wcard, attr);
407 return map_nt_error_from_unix(errno);
410 string_set(&conn->dirpath,path);
412 if (dirhandles_open >= MAX_OPEN_DIRECTORIES) {
416 dptr = SMB_MALLOC_P(struct dptr_struct);
418 DEBUG(0,("malloc fail in dptr_create.\n"));
419 TALLOC_FREE(dir_hnd);
420 return NT_STATUS_NO_MEMORY;
428 * This is an old-style SMBsearch request. Ensure the
429 * value we return will fit in the range 1-255.
432 dptr->dnum = bitmap_find(dptr_bmap, 0);
434 if(dptr->dnum == -1 || dptr->dnum > 254) {
437 * Try and close the oldest handle not marked for
438 * expect close in the hope that the client has
439 * finished with that one.
442 dptr_close_oldest(True);
444 /* Now try again... */
445 dptr->dnum = bitmap_find(dptr_bmap, 0);
446 if(dptr->dnum == -1 || dptr->dnum > 254) {
447 DEBUG(0,("dptr_create: returned %d: Error - all old dirptrs in use ?\n", dptr->dnum));
449 TALLOC_FREE(dir_hnd);
450 return NT_STATUS_TOO_MANY_OPENED_FILES;
456 * This is a new-style trans2 request. Allocate from
457 * a range that will return 256 - MAX_DIRECTORY_HANDLES.
460 dptr->dnum = bitmap_find(dptr_bmap, 255);
462 if(dptr->dnum == -1 || dptr->dnum < 255) {
465 * Try and close the oldest handle close in the hope that
466 * the client has finished with that one. This will only
467 * happen in the case of the Win98 client bug where it leaks
471 dptr_close_oldest(False);
473 /* Now try again... */
474 dptr->dnum = bitmap_find(dptr_bmap, 255);
476 if(dptr->dnum == -1 || dptr->dnum < 255) {
477 DEBUG(0,("dptr_create: returned %d: Error - all new dirptrs in use ?\n", dptr->dnum));
479 TALLOC_FREE(dir_hnd);
480 return NT_STATUS_TOO_MANY_OPENED_FILES;
485 bitmap_set(dptr_bmap, dptr->dnum);
487 dptr->dnum += 1; /* Always bias the dnum by one - no zero dnums allowed. */
489 string_set(&dptr->path,path);
491 dptr->dir_hnd = dir_hnd;
493 dptr->expect_close = expect_close;
494 dptr->wcard = SMB_STRDUP(wcard);
496 bitmap_clear(dptr_bmap, dptr->dnum - 1);
498 TALLOC_FREE(dir_hnd);
499 return NT_STATUS_NO_MEMORY;
501 if (lp_posix_pathnames() || (wcard[0] == '.' && wcard[1] == 0)) {
502 dptr->has_wild = True;
504 dptr->has_wild = wcard_has_wild;
509 DLIST_ADD(dirptrs, dptr);
511 DEBUG(3,("creating new dirptr %d for path %s, expect_close = %d\n",
512 dptr->dnum,path,expect_close));
520 /****************************************************************************
521 Wrapper functions to access the lower level directory handles.
522 ****************************************************************************/
524 int dptr_CloseDir(struct dptr_struct *dptr)
526 DLIST_REMOVE(dirptrs, dptr);
527 TALLOC_FREE(dptr->dir_hnd);
531 void dptr_SeekDir(struct dptr_struct *dptr, long offset)
533 SeekDir(dptr->dir_hnd, offset);
536 long dptr_TellDir(struct dptr_struct *dptr)
538 return TellDir(dptr->dir_hnd);
541 bool dptr_has_wild(struct dptr_struct *dptr)
543 return dptr->has_wild;
546 int dptr_dnum(struct dptr_struct *dptr)
551 /****************************************************************************
552 Return the next visible file name, skipping veto'd and invisible files.
553 ****************************************************************************/
555 static const char *dptr_normal_ReadDirName(struct dptr_struct *dptr,
556 long *poffset, SMB_STRUCT_STAT *pst)
558 /* Normal search for the next file. */
560 while ((name = ReadDirName(dptr->dir_hnd, poffset, pst)) != NULL) {
561 if (is_visible_file(dptr->conn, dptr->path, name, pst, True)) {
568 /****************************************************************************
569 Return the next visible file name, skipping veto'd and invisible files.
570 ****************************************************************************/
572 char *dptr_ReadDirName(TALLOC_CTX *ctx,
573 struct dptr_struct *dptr,
575 SMB_STRUCT_STAT *pst)
577 struct smb_filename *smb_fname_base = NULL;
579 char *pathreal = NULL;
580 char *found_name = NULL;
582 const char *name_temp = NULL;
585 SET_STAT_INVALID(*pst);
587 if (dptr->has_wild || dptr->did_stat) {
588 name_temp = dptr_normal_ReadDirName(dptr, poffset, pst);
589 name = talloc_strdup(ctx, name_temp);
593 /* If poffset is -1 then we know we returned this name before and we
594 * have no wildcards. We're at the end of the directory. */
595 if (*poffset == END_OF_DIRECTORY_OFFSET) {
599 /* We know the stored wcard contains no wildcard characters.
600 * See if we can match with a stat call. If we can't, then set
601 * did_stat to true to ensure we only do this once and keep
604 dptr->did_stat = true;
606 /* First check if it should be visible. */
607 if (!is_visible_file(dptr->conn, dptr->path, dptr->wcard,
610 /* This only returns false if the file was found, but
611 is explicitly not visible. Set us to end of
612 directory, but return NULL as we know we can't ever
617 if (VALID_STAT(*pst)) {
618 name = talloc_strdup(ctx, dptr->wcard);
622 pathreal = talloc_asprintf(ctx,
629 /* Create an smb_filename with stream_name == NULL. */
630 status = create_synthetic_smb_fname(ctx, pathreal, NULL, NULL,
632 if (!NT_STATUS_IS_OK(status)) {
636 if (SMB_VFS_STAT(dptr->conn, smb_fname_base) == 0) {
637 *pst = smb_fname_base->st;
638 TALLOC_FREE(smb_fname_base);
639 name = talloc_strdup(ctx, dptr->wcard);
642 TALLOC_FREE(smb_fname_base);
643 /* If we get any other error than ENOENT or ENOTDIR
644 then the file exists we just can't stat it. */
645 if (errno != ENOENT && errno != ENOTDIR) {
646 name = talloc_strdup(ctx, dptr->wcard);
651 /* Stat failed. We know this is authoratiative if we are
652 * providing case sensitive semantics or the underlying
653 * filesystem is case sensitive.
655 if (dptr->conn->case_sensitive ||
656 !(dptr->conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH))
662 * Try case-insensitive stat if the fs has the ability. This avoids
663 * scanning the whole directory.
665 ret = SMB_VFS_GET_REAL_FILENAME(dptr->conn, dptr->path, dptr->wcard,
670 } else if (errno == ENOENT) {
671 /* The case-insensitive lookup was authoritative. */
675 TALLOC_FREE(pathreal);
677 name_temp = dptr_normal_ReadDirName(dptr, poffset, pst);
678 name = talloc_strdup(ctx, name_temp);
682 TALLOC_FREE(pathreal);
684 /* We need to set the underlying dir_hnd offset to -1
685 * also as this function is usually called with the
686 * output from TellDir. */
687 dptr->dir_hnd->offset = *poffset = END_OF_DIRECTORY_OFFSET;
691 /****************************************************************************
692 Search for a file by name, skipping veto'ed and not visible files.
693 ****************************************************************************/
695 bool dptr_SearchDir(struct dptr_struct *dptr, const char *name, long *poffset, SMB_STRUCT_STAT *pst)
697 SET_STAT_INVALID(*pst);
699 if (!dptr->has_wild && (dptr->dir_hnd->offset == END_OF_DIRECTORY_OFFSET)) {
700 /* This is a singleton directory and we're already at the end. */
701 *poffset = END_OF_DIRECTORY_OFFSET;
705 return SearchDir(dptr->dir_hnd, name, poffset);
708 /****************************************************************************
709 Add the name we're returning into the underlying cache.
710 ****************************************************************************/
712 void dptr_DirCacheAdd(struct dptr_struct *dptr, const char *name, long offset)
714 DirCacheAdd(dptr->dir_hnd, name, offset);
717 /****************************************************************************
718 Initialize variables & state data at the beginning of all search SMB requests.
719 ****************************************************************************/
720 void dptr_init_search_op(struct dptr_struct *dptr)
722 SMB_VFS_INIT_SEARCH_OP(dptr->conn, dptr->dir_hnd->dir);
725 /****************************************************************************
726 Fill the 5 byte server reserved dptr field.
727 ****************************************************************************/
729 bool dptr_fill(char *buf1,unsigned int key)
731 unsigned char *buf = (unsigned char *)buf1;
732 struct dptr_struct *dptr = dptr_get(key, False);
735 DEBUG(1,("filling null dirptr %d\n",key));
738 offset = (uint32)TellDir(dptr->dir_hnd);
739 DEBUG(6,("fill on key %u dirptr 0x%lx now at %d\n",key,
740 (long)dptr->dir_hnd,(int)offset));
746 /****************************************************************************
747 Fetch the dir ptr and seek it given the 5 byte server field.
748 ****************************************************************************/
750 struct dptr_struct *dptr_fetch(char *buf,int *num)
752 unsigned int key = *(unsigned char *)buf;
753 struct dptr_struct *dptr = dptr_get(key, False);
758 DEBUG(3,("fetched null dirptr %d\n",key));
762 offset = IVAL(buf,1);
763 if (offset == (uint32)-1) {
764 seekoff = END_OF_DIRECTORY_OFFSET;
766 seekoff = (long)offset;
768 SeekDir(dptr->dir_hnd,seekoff);
769 DEBUG(3,("fetching dirptr %d for path %s at offset %d\n",
770 key,dptr_path(key),(int)seekoff));
774 /****************************************************************************
776 ****************************************************************************/
778 struct dptr_struct *dptr_fetch_lanman2(int dptr_num)
780 struct dptr_struct *dptr = dptr_get(dptr_num, False);
783 DEBUG(3,("fetched null dirptr %d\n",dptr_num));
786 DEBUG(3,("fetching dirptr %d for path %s\n",dptr_num,dptr_path(dptr_num)));
790 /****************************************************************************
791 Check that a file matches a particular file type.
792 ****************************************************************************/
794 bool dir_check_ftype(connection_struct *conn, uint32 mode, uint32 dirtype)
798 /* Check the "may have" search bits. */
799 if (((mode & ~dirtype) & (aHIDDEN | aSYSTEM | aDIR)) != 0)
802 /* Check the "must have" bits, which are the may have bits shifted eight */
803 /* If must have bit is set, the file/dir can not be returned in search unless the matching
804 file attribute is set */
805 mask = ((dirtype >> 8) & (aDIR|aARCH|aRONLY|aHIDDEN|aSYSTEM)); /* & 0x37 */
807 if((mask & (mode & (aDIR|aARCH|aRONLY|aHIDDEN|aSYSTEM))) == mask) /* check if matching attribute present */
816 static bool mangle_mask_match(connection_struct *conn,
817 const char *filename,
822 if (!name_to_8_3(filename,mname,False,conn->params)) {
825 return mask_match_search(mname,mask,False);
828 /****************************************************************************
829 Get an 8.3 directory entry.
830 ****************************************************************************/
832 bool get_dir_entry(TALLOC_CTX *ctx,
833 connection_struct *conn,
839 struct timespec *date,
845 SMB_STRUCT_STAT sbuf;
846 char *pathreal = NULL;
847 char *filename = NULL;
850 *pp_fname_out = NULL;
852 needslash = ( conn->dirpath[strlen(conn->dirpath) -1] != '/');
859 long curoff = dptr_TellDir(conn->dirptr);
860 dname = dptr_ReadDirName(ctx, conn->dirptr, &curoff, &sbuf);
862 DEBUG(6,("readdir on dirptr 0x%lx now at offset %ld\n",
863 (long)conn->dirptr,TellDir(conn->dirptr->dir_hnd)));
871 /* notice the special *.* handling. This appears to be the only difference
872 between the wildcard handling in this routine and in the trans2 routines.
873 see masktest for a demo
875 if ((strcmp(mask,"*.*") == 0) ||
876 mask_match_search(filename,mask,False) ||
877 mangle_mask_match(conn,filename,mask)) {
879 struct smb_filename *smb_fname = NULL;
882 if (!mangle_is_8_3(filename, False, conn->params)) {
883 if (!name_to_8_3(filename,mname,False,
885 TALLOC_FREE(filename);
888 filename = talloc_strdup(ctx, mname);
895 pathreal = talloc_asprintf(ctx,
900 pathreal = talloc_asprintf(ctx,
906 TALLOC_FREE(filename);
910 /* Create smb_fname with NULL stream_name. */
911 status = create_synthetic_smb_fname(ctx, pathreal,
915 TALLOC_FREE(pathreal);
916 if (!NT_STATUS_IS_OK(status)) {
917 TALLOC_FREE(filename);
921 if (!VALID_STAT(smb_fname->st)) {
922 if ((SMB_VFS_STAT(conn, smb_fname)) != 0) {
923 DEBUG(5,("Couldn't stat 1 [%s]. Error "
925 smb_fname_str_dbg(smb_fname),
927 TALLOC_FREE(smb_fname);
928 TALLOC_FREE(filename);
933 *mode = dos_mode(conn, smb_fname);
935 if (!dir_check_ftype(conn,*mode,dirtype)) {
936 DEBUG(5,("[%s] attribs 0x%x didn't match 0x%x\n",filename,(unsigned int)*mode,(unsigned int)dirtype));
937 TALLOC_FREE(smb_fname);
938 TALLOC_FREE(filename);
942 *size = smb_fname->st.st_ex_size;
943 *date = smb_fname->st.st_ex_mtime;
946 struct timespec write_time_ts;
947 struct file_id fileid;
949 fileid = vfs_file_id_from_sbuf(conn,
951 get_file_infos(fileid, NULL, &write_time_ts);
952 if (!null_timespec(write_time_ts)) {
953 *date = write_time_ts;
957 DEBUG(3,("get_dir_entry mask=[%s] found %s "
960 smb_fname_str_dbg(smb_fname),
966 SMB_ASSERT(filename != NULL);
967 *pp_fname_out = filename;
969 DirCacheAdd(conn->dirptr->dir_hnd, dname, curoff);
970 TALLOC_FREE(smb_fname);
974 TALLOC_FREE(filename);
980 /*******************************************************************
981 Check to see if a user can read a file. This is only approximate,
982 it is used as part of the "hide unreadable" option. Don't
983 use it for anything security sensitive.
984 ********************************************************************/
986 static bool user_can_read_file(connection_struct *conn,
987 struct smb_filename *smb_fname)
990 * If user is a member of the Admin group
991 * we never hide files from them.
994 if (conn->admin_user) {
998 return can_access_file_acl(conn, smb_fname, FILE_READ_DATA);
1001 /*******************************************************************
1002 Check to see if a user can write a file (and only files, we do not
1003 check dirs on this one). This is only approximate,
1004 it is used as part of the "hide unwriteable" option. Don't
1005 use it for anything security sensitive.
1006 ********************************************************************/
1008 static bool user_can_write_file(connection_struct *conn,
1009 const struct smb_filename *smb_fname)
1012 * If user is a member of the Admin group
1013 * we never hide files from them.
1016 if (conn->admin_user) {
1020 SMB_ASSERT(VALID_STAT(smb_fname->st));
1022 /* Pseudo-open the file */
1024 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
1028 return can_write_to_file(conn, smb_fname);
1031 /*******************************************************************
1032 Is a file a "special" type ?
1033 ********************************************************************/
1035 static bool file_is_special(connection_struct *conn,
1036 const struct smb_filename *smb_fname)
1039 * If user is a member of the Admin group
1040 * we never hide files from them.
1043 if (conn->admin_user)
1046 SMB_ASSERT(VALID_STAT(smb_fname->st));
1048 if (S_ISREG(smb_fname->st.st_ex_mode) ||
1049 S_ISDIR(smb_fname->st.st_ex_mode) ||
1050 S_ISLNK(smb_fname->st.st_ex_mode))
1056 /*******************************************************************
1057 Should the file be seen by the client?
1058 NOTE: A successful return is no guarantee of the file's existence.
1059 ********************************************************************/
1061 bool is_visible_file(connection_struct *conn, const char *dir_path,
1062 const char *name, SMB_STRUCT_STAT *pst, bool use_veto)
1064 bool hide_unreadable = lp_hideunreadable(SNUM(conn));
1065 bool hide_unwriteable = lp_hideunwriteable_files(SNUM(conn));
1066 bool hide_special = lp_hide_special_files(SNUM(conn));
1068 struct smb_filename *smb_fname_base = NULL;
1072 if ((strcmp(".",name) == 0) || (strcmp("..",name) == 0)) {
1073 return True; /* . and .. are always visible. */
1076 /* If it's a vetoed file, pretend it doesn't even exist */
1077 if (use_veto && IS_VETO_PATH(conn, name)) {
1078 DEBUG(10,("is_visible_file: file %s is vetoed.\n", name ));
1082 if (hide_unreadable || hide_unwriteable || hide_special) {
1083 entry = talloc_asprintf(talloc_tos(), "%s/%s", dir_path, name);
1089 /* If it's a dfs symlink, ignore _hide xxxx_ options */
1090 if (lp_host_msdfs() &&
1091 lp_msdfs_root(SNUM(conn)) &&
1092 is_msdfs_link(conn, entry, NULL)) {
1097 /* Create an smb_filename with stream_name == NULL. */
1098 status = create_synthetic_smb_fname(talloc_tos(), entry, NULL,
1099 pst, &smb_fname_base);
1100 if (!NT_STATUS_IS_OK(status)) {
1105 /* If the file name does not exist, there's no point checking
1106 * the configuration options. We succeed, on the basis that the
1107 * checks *might* have passed if the file was present.
1109 if (!VALID_STAT(*pst)) {
1110 if (SMB_VFS_STAT(conn, smb_fname_base) != 0) {
1114 *pst = smb_fname_base->st;
1118 /* Honour _hide unreadable_ option */
1119 if (hide_unreadable &&
1120 !user_can_read_file(conn, smb_fname_base)) {
1121 DEBUG(10,("is_visible_file: file %s is unreadable.\n",
1126 /* Honour _hide unwriteable_ option */
1127 if (hide_unwriteable && !user_can_write_file(conn,
1129 DEBUG(10,("is_visible_file: file %s is unwritable.\n",
1134 /* Honour _hide_special_ option */
1135 if (hide_special && file_is_special(conn, smb_fname_base)) {
1136 DEBUG(10,("is_visible_file: file %s is special.\n",
1145 TALLOC_FREE(smb_fname_base);
1150 static int smb_Dir_destructor(struct smb_Dir *dirp)
1153 SMB_VFS_CLOSEDIR(dirp->conn,dirp->dir);
1159 /*******************************************************************
1161 ********************************************************************/
1163 struct smb_Dir *OpenDir(TALLOC_CTX *mem_ctx, connection_struct *conn,
1164 const char *name, const char *mask, uint32 attr)
1166 struct smb_Dir *dirp = TALLOC_ZERO_P(mem_ctx, struct smb_Dir);
1173 dirp->name_cache_size = lp_directory_name_cache_size(SNUM(conn));
1175 dirp->dir_path = talloc_strdup(dirp, name);
1176 if (!dirp->dir_path) {
1182 talloc_set_destructor(dirp, smb_Dir_destructor);
1184 dirp->dir = SMB_VFS_OPENDIR(conn, dirp->dir_path, mask, attr);
1186 DEBUG(5,("OpenDir: Can't open %s. %s\n", dirp->dir_path,
1198 /*******************************************************************
1199 Read from a directory.
1200 Return directory entry, current offset, and optional stat information.
1201 Don't check for veto or invisible files.
1202 ********************************************************************/
1204 const char *ReadDirName(struct smb_Dir *dirp, long *poffset,
1205 SMB_STRUCT_STAT *sbuf)
1208 connection_struct *conn = dirp->conn;
1210 /* Cheat to allow . and .. to be the first entries returned. */
1211 if (((*poffset == START_OF_DIRECTORY_OFFSET) ||
1212 (*poffset == DOT_DOT_DIRECTORY_OFFSET)) && (dirp->file_number < 2))
1214 if (dirp->file_number == 0) {
1216 *poffset = dirp->offset = START_OF_DIRECTORY_OFFSET;
1218 *poffset = dirp->offset = DOT_DOT_DIRECTORY_OFFSET;
1221 dirp->file_number++;
1223 } else if (*poffset == END_OF_DIRECTORY_OFFSET) {
1224 *poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1227 /* A real offset, seek to it. */
1228 SeekDir(dirp, *poffset);
1231 while ((n = vfs_readdirname(conn, dirp->dir, sbuf))) {
1232 /* Ignore . and .. - we've already returned them. */
1234 if ((n[1] == '\0') || (n[1] == '.' && n[2] == '\0')) {
1238 *poffset = dirp->offset = SMB_VFS_TELLDIR(conn, dirp->dir);
1239 dirp->file_number++;
1242 *poffset = dirp->offset = END_OF_DIRECTORY_OFFSET;
1246 /*******************************************************************
1247 Rewind to the start.
1248 ********************************************************************/
1250 void RewindDir(struct smb_Dir *dirp, long *poffset)
1252 SMB_VFS_REWINDDIR(dirp->conn, dirp->dir);
1253 dirp->file_number = 0;
1254 dirp->offset = START_OF_DIRECTORY_OFFSET;
1255 *poffset = START_OF_DIRECTORY_OFFSET;
1258 /*******************************************************************
1260 ********************************************************************/
1262 void SeekDir(struct smb_Dir *dirp, long offset)
1264 if (offset != dirp->offset) {
1265 if (offset == START_OF_DIRECTORY_OFFSET) {
1266 RewindDir(dirp, &offset);
1268 * Ok we should really set the file number here
1269 * to 1 to enable ".." to be returned next. Trouble
1270 * is I'm worried about callers using SeekDir(dirp,0)
1271 * as equivalent to RewindDir(). So leave this alone
1274 } else if (offset == DOT_DOT_DIRECTORY_OFFSET) {
1275 RewindDir(dirp, &offset);
1277 * Set the file number to 2 - we want to get the first
1278 * real file entry (the one we return after "..")
1279 * on the next ReadDir.
1281 dirp->file_number = 2;
1282 } else if (offset == END_OF_DIRECTORY_OFFSET) {
1283 ; /* Don't seek in this case. */
1285 SMB_VFS_SEEKDIR(dirp->conn, dirp->dir, offset);
1287 dirp->offset = offset;
1291 /*******************************************************************
1292 Tell a dir position.
1293 ********************************************************************/
1295 long TellDir(struct smb_Dir *dirp)
1297 return(dirp->offset);
1300 /*******************************************************************
1301 Add an entry into the dcache.
1302 ********************************************************************/
1304 void DirCacheAdd(struct smb_Dir *dirp, const char *name, long offset)
1306 struct name_cache_entry *e;
1308 if (dirp->name_cache_size == 0) {
1312 if (dirp->name_cache == NULL) {
1313 dirp->name_cache = TALLOC_ZERO_ARRAY(
1314 dirp, struct name_cache_entry, dirp->name_cache_size);
1316 if (dirp->name_cache == NULL) {
1321 dirp->name_cache_index = (dirp->name_cache_index+1) %
1322 dirp->name_cache_size;
1323 e = &dirp->name_cache[dirp->name_cache_index];
1324 TALLOC_FREE(e->name);
1325 e->name = talloc_strdup(dirp, name);
1329 /*******************************************************************
1330 Find an entry by name. Leave us at the offset after it.
1331 Don't check for veto or invisible files.
1332 ********************************************************************/
1334 bool SearchDir(struct smb_Dir *dirp, const char *name, long *poffset)
1338 connection_struct *conn = dirp->conn;
1340 /* Search back in the name cache. */
1341 if (dirp->name_cache_size && dirp->name_cache) {
1342 for (i = dirp->name_cache_index; i >= 0; i--) {
1343 struct name_cache_entry *e = &dirp->name_cache[i];
1344 if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1345 *poffset = e->offset;
1346 SeekDir(dirp, e->offset);
1350 for (i = dirp->name_cache_size - 1; i > dirp->name_cache_index; i--) {
1351 struct name_cache_entry *e = &dirp->name_cache[i];
1352 if (e->name && (conn->case_sensitive ? (strcmp(e->name, name) == 0) : strequal(e->name, name))) {
1353 *poffset = e->offset;
1354 SeekDir(dirp, e->offset);
1360 /* Not found in the name cache. Rewind directory and start from scratch. */
1361 SMB_VFS_REWINDDIR(conn, dirp->dir);
1362 dirp->file_number = 0;
1363 *poffset = START_OF_DIRECTORY_OFFSET;
1364 while ((entry = ReadDirName(dirp, poffset, NULL))) {
1365 if (conn->case_sensitive ? (strcmp(entry, name) == 0) : strequal(entry, name)) {
1372 /*****************************************************************
1373 Is this directory empty ?
1374 *****************************************************************/
1376 NTSTATUS can_delete_directory(struct connection_struct *conn,
1377 const char *dirname)
1379 NTSTATUS status = NT_STATUS_OK;
1383 struct smb_Dir *dir_hnd = OpenDir(talloc_tos(), conn, dirname,
1387 return map_nt_error_from_unix(errno);
1390 while ((dname = ReadDirName(dir_hnd, &dirpos, &st))) {
1391 /* Quick check for "." and ".." */
1392 if (dname[0] == '.') {
1393 if (!dname[1] || (dname[1] == '.' && !dname[2])) {
1398 if (!is_visible_file(conn, dirname, dname, &st, True)) {
1402 DEBUG(10,("can_delete_directory: got name %s - can't delete\n",
1404 status = NT_STATUS_DIRECTORY_NOT_EMPTY;
1407 TALLOC_FREE(dir_hnd);