2 Unix SMB/CIFS implementation.
3 filename handling routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1999-2007
6 Copyright (C) Ying Chen 2000
7 Copyright (C) Volker Lendecke 2007
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * New hash table stat cache code added by Ying Chen.
28 #include "system/filesys.h"
29 #include "fake_file.h"
30 #include "smbd/smbd.h"
31 #include "smbd/globals.h"
33 static NTSTATUS
build_stream_path(TALLOC_CTX
*mem_ctx
,
34 connection_struct
*conn
,
35 const char *orig_path
,
36 struct smb_filename
*smb_fname
);
38 /****************************************************************************
39 Mangle the 2nd name and check if it is then equal to the first name.
40 ****************************************************************************/
42 static bool mangled_equal(const char *name1
,
44 const struct share_params
*p
)
48 if (!name_to_8_3(name2
, mname
, False
, p
)) {
51 return strequal(name1
, mname
);
54 /****************************************************************************
55 Cope with the differing wildcard and non-wildcard error cases.
56 ****************************************************************************/
58 static NTSTATUS
determine_path_error(const char *name
,
59 bool allow_wcard_last_component
)
63 if (!allow_wcard_last_component
) {
64 /* Error code within a pathname. */
65 return NT_STATUS_OBJECT_PATH_NOT_FOUND
;
68 /* We're terminating here so we
69 * can be a little slower and get
70 * the error code right. Windows
71 * treats the last part of the pathname
72 * separately I think, so if the last
73 * component is a wildcard then we treat
74 * this ./ as "end of component" */
76 p
= strchr(name
, '/');
78 if (!p
&& (ms_has_wild(name
) || ISDOT(name
))) {
79 /* Error code at the end of a pathname. */
80 return NT_STATUS_OBJECT_NAME_INVALID
;
82 /* Error code within a pathname. */
83 return NT_STATUS_OBJECT_PATH_NOT_FOUND
;
87 static NTSTATUS
check_for_dot_component(const struct smb_filename
*smb_fname
)
89 /* Ensure we catch all names with in "/."
90 this is disallowed under Windows and
91 in POSIX they've already been removed. */
92 const char *p
= strstr(smb_fname
->base_name
, "/."); /*mb safe*/
95 /* Error code within a pathname. */
96 return NT_STATUS_OBJECT_PATH_NOT_FOUND
;
97 } else if (p
[2] == '\0') {
98 /* Error code at the end of a pathname. */
99 return NT_STATUS_OBJECT_NAME_INVALID
;
105 /****************************************************************************
106 Optimization for common case where the missing part
107 is in the last component and the client already
108 sent the correct case.
109 Returns NT_STATUS_OK to mean continue the tree walk
110 (possibly with modified start pointer).
111 Any other NT_STATUS_XXX error means terminate the path
113 ****************************************************************************/
115 static NTSTATUS
check_parent_exists(TALLOC_CTX
*ctx
,
116 connection_struct
*conn
,
117 bool posix_pathnames
,
118 const struct smb_filename
*smb_fname
,
122 struct smb_filename parent_fname
;
123 const char *last_component
= NULL
;
127 ZERO_STRUCT(parent_fname
);
128 if (!parent_dirname(ctx
, smb_fname
->base_name
,
129 &parent_fname
.base_name
,
131 return NT_STATUS_NO_MEMORY
;
135 * If there was no parent component in
136 * smb_fname->base_name of the parent name
137 * contained a wildcard then don't do this
140 if ((smb_fname
->base_name
== last_component
) ||
141 ms_has_wild(parent_fname
.base_name
)) {
145 if (posix_pathnames
) {
146 ret
= SMB_VFS_LSTAT(conn
, &parent_fname
);
148 ret
= SMB_VFS_STAT(conn
, &parent_fname
);
151 /* If the parent stat failed, just continue
152 with the normal tree walk. */
158 status
= check_for_dot_component(&parent_fname
);
159 if (!NT_STATUS_IS_OK(status
)) {
163 /* Parent exists - set "start" to be the
164 * last compnent to shorten the tree walk. */
167 * Safe to use discard_const_p
168 * here as last_component points
169 * into our smb_fname->base_name.
171 *pp_start
= discard_const_p(char, last_component
);
173 /* Update dirpath. */
174 TALLOC_FREE(*pp_dirpath
);
175 *pp_dirpath
= talloc_strdup(ctx
, parent_fname
.base_name
);
177 return NT_STATUS_NO_MEMORY
;
180 DEBUG(5,("check_parent_exists: name "
181 "= %s, dirpath = %s, "
183 smb_fname
->base_name
,
190 /****************************************************************************
191 This routine is called to convert names from the dos namespace to unix
192 namespace. It needs to handle any case conversions, mangling, format changes,
195 We assume that we have already done a chdir() to the right "root" directory
198 The function will return an NTSTATUS error if some part of the name except for
199 the last part cannot be resolved, else NT_STATUS_OK.
201 Note NT_STATUS_OK doesn't mean the name exists or is valid, just that we
202 didn't get any fatal errors that should immediately terminate the calling SMB
203 processing whilst resolving.
205 If the UCF_SAVE_LCOMP flag is passed in, then the unmodified last component
206 of the pathname is set in smb_filename->original_lcomp.
208 If UCF_ALWAYS_ALLOW_WCARD_LCOMP is passed in, then a MS wildcard was detected
209 and should be allowed in the last component of the path only.
211 If the orig_path was a stream, smb_filename->base_name will point to the base
212 filename, and smb_filename->stream_name will point to the stream name. If
213 orig_path was not a stream, then smb_filename->stream_name will be NULL.
215 On exit from unix_convert, the smb_filename->st stat struct will be populated
216 if the file exists and was found, if not this stat struct will be filled with
217 zeros (and this can be detected by checking for nlinks = 0, which can never be
219 ****************************************************************************/
221 NTSTATUS
unix_convert(TALLOC_CTX
*ctx
,
222 connection_struct
*conn
,
223 const char *orig_path
,
224 struct smb_filename
**smb_fname_out
,
227 struct smb_filename
*smb_fname
= NULL
;
229 char *dirpath
= NULL
;
231 bool component_was_mangled
= False
;
232 bool name_has_wildcard
= False
;
233 bool posix_pathnames
= false;
234 bool allow_wcard_last_component
=
235 (ucf_flags
& UCF_ALWAYS_ALLOW_WCARD_LCOMP
);
236 bool save_last_component
= ucf_flags
& UCF_SAVE_LCOMP
;
240 *smb_fname_out
= NULL
;
242 smb_fname
= talloc_zero(ctx
, struct smb_filename
);
243 if (smb_fname
== NULL
) {
244 return NT_STATUS_NO_MEMORY
;
248 /* we don't ever use the filenames on a printer share as a
249 filename - so don't convert them */
250 if (!(smb_fname
->base_name
= talloc_strdup(smb_fname
,
252 status
= NT_STATUS_NO_MEMORY
;
258 DEBUG(5, ("unix_convert called on file \"%s\"\n", orig_path
));
261 * Conversion to basic unix format is already done in
262 * check_path_syntax().
266 * Names must be relative to the root of the service - any leading /.
267 * and trailing /'s should have been trimmed by check_path_syntax().
271 SMB_ASSERT(*orig_path
!= '/');
275 * If we trimmed down to a single '\0' character
276 * then we should use the "." directory to avoid
277 * searching the cache, but not if we are in a
279 * As we know this is valid we can return true here.
283 if (!(smb_fname
->base_name
= talloc_strdup(smb_fname
, "."))) {
284 status
= NT_STATUS_NO_MEMORY
;
287 if (SMB_VFS_STAT(conn
, smb_fname
) != 0) {
288 status
= map_nt_error_from_unix(errno
);
291 DEBUG(5, ("conversion finished \"\" -> %s\n",
292 smb_fname
->base_name
));
296 if (orig_path
[0] == '.' && (orig_path
[1] == '/' ||
297 orig_path
[1] == '\0')) {
298 /* Start of pathname can't be "." only. */
299 if (orig_path
[1] == '\0' || orig_path
[2] == '\0') {
300 status
= NT_STATUS_OBJECT_NAME_INVALID
;
302 status
=determine_path_error(&orig_path
[2],
303 allow_wcard_last_component
);
308 /* Start with the full orig_path as given by the caller. */
309 if (!(smb_fname
->base_name
= talloc_strdup(smb_fname
, orig_path
))) {
310 DEBUG(0, ("talloc_strdup failed\n"));
311 status
= NT_STATUS_NO_MEMORY
;
316 * Large directory fix normalization. If we're case sensitive, and
317 * the case preserving parameters are set to "no", normalize the case of
318 * the incoming filename from the client WHETHER IT EXISTS OR NOT !
319 * This is in conflict with the current (3.0.20) man page, but is
320 * what people expect from the "large directory howto". I'll update
321 * the man page. Thanks to jht@samba.org for finding this. JRA.
324 if (conn
->case_sensitive
&& !conn
->case_preserve
&&
325 !conn
->short_case_preserve
) {
326 strnorm(smb_fname
->base_name
, lp_defaultcase(SNUM(conn
)));
330 * Ensure saved_last_component is valid even if file exists.
333 if(save_last_component
) {
334 end
= strrchr_m(smb_fname
->base_name
, '/');
336 smb_fname
->original_lcomp
= talloc_strdup(smb_fname
,
339 smb_fname
->original_lcomp
=
340 talloc_strdup(smb_fname
, smb_fname
->base_name
);
342 if (smb_fname
->original_lcomp
== NULL
) {
343 status
= NT_STATUS_NO_MEMORY
;
348 posix_pathnames
= (lp_posix_pathnames() ||
349 (ucf_flags
& UCF_POSIX_PATHNAMES
));
352 * Strip off the stream, and add it back when we're done with the
355 if (!posix_pathnames
) {
356 stream
= strchr_m(smb_fname
->base_name
, ':');
358 if (stream
!= NULL
) {
359 char *tmp
= talloc_strdup(smb_fname
, stream
);
361 status
= NT_STATUS_NO_MEMORY
;
365 * Since this is actually pointing into
366 * smb_fname->base_name this truncates base_name.
373 start
= smb_fname
->base_name
;
376 * If we're providing case insensitive semantics or
377 * the underlying filesystem is case insensitive,
378 * then a case-normalized hit in the stat-cache is
379 * authoratitive. JRA.
381 * Note: We're only checking base_name. The stream_name will be
382 * added and verified in build_stream_path().
385 if((!conn
->case_sensitive
|| !(conn
->fs_capabilities
&
386 FILE_CASE_SENSITIVE_SEARCH
)) &&
387 stat_cache_lookup(conn
, posix_pathnames
, &smb_fname
->base_name
, &dirpath
, &start
,
393 * Make sure "dirpath" is an allocated string, we use this for
394 * building the directories with talloc_asprintf and free it.
397 if ((dirpath
== NULL
) && (!(dirpath
= talloc_strdup(ctx
,"")))) {
398 DEBUG(0, ("talloc_strdup failed\n"));
399 status
= NT_STATUS_NO_MEMORY
;
404 * If we have a wildcard we must walk the path to
405 * find where the error is, even if case sensitive
409 name_has_wildcard
= ms_has_wild(smb_fname
->base_name
);
410 if (name_has_wildcard
&& !allow_wcard_last_component
) {
411 /* Wildcard not valid anywhere. */
412 status
= NT_STATUS_OBJECT_NAME_INVALID
;
416 DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
417 smb_fname
->base_name
, dirpath
, start
));
419 if (!name_has_wildcard
) {
421 * stat the name - if it exists then we can add the stream back (if
422 * there was one) and be done!
425 if (posix_pathnames
) {
426 ret
= SMB_VFS_LSTAT(conn
, smb_fname
);
428 ret
= SMB_VFS_STAT(conn
, smb_fname
);
432 status
= check_for_dot_component(smb_fname
);
433 if (!NT_STATUS_IS_OK(status
)) {
436 /* Add the path (not including the stream) to the cache. */
437 stat_cache_add(orig_path
, smb_fname
->base_name
,
438 conn
->case_sensitive
);
439 DEBUG(5,("conversion of base_name finished %s -> %s\n",
440 orig_path
, smb_fname
->base_name
));
444 /* Stat failed - ensure we don't use it. */
445 SET_STAT_INVALID(smb_fname
->st
);
447 if (errno
== ENOENT
) {
448 /* Optimization when creating a new file - only
449 the last component doesn't exist. */
450 status
= check_parent_exists(ctx
,
456 if (!NT_STATUS_IS_OK(status
)) {
462 * A special case - if we don't have any wildcards or mangling chars and are case
463 * sensitive or the underlying filesystem is case insensitive then searching
467 if ((conn
->case_sensitive
|| !(conn
->fs_capabilities
&
468 FILE_CASE_SENSITIVE_SEARCH
)) &&
469 !mangle_is_mangled(smb_fname
->base_name
, conn
->params
)) {
471 status
= check_for_dot_component(smb_fname
);
472 if (!NT_STATUS_IS_OK(status
)) {
477 * The stat failed. Could be ok as it could be
481 if (errno
== ENOTDIR
|| errno
== ELOOP
) {
482 status
= NT_STATUS_OBJECT_PATH_NOT_FOUND
;
484 } else if (errno
== ENOENT
) {
486 * Was it a missing last component ?
487 * or a missing intermediate component ?
489 struct smb_filename parent_fname
;
490 const char *last_component
= NULL
;
492 ZERO_STRUCT(parent_fname
);
493 if (!parent_dirname(ctx
, smb_fname
->base_name
,
494 &parent_fname
.base_name
,
496 status
= NT_STATUS_NO_MEMORY
;
499 if (posix_pathnames
) {
500 ret
= SMB_VFS_LSTAT(conn
, &parent_fname
);
502 ret
= SMB_VFS_STAT(conn
, &parent_fname
);
505 if (errno
== ENOTDIR
||
508 status
= NT_STATUS_OBJECT_PATH_NOT_FOUND
;
514 * Missing last component is ok - new file.
515 * Also deal with permission denied elsewhere.
516 * Just drop out to done.
523 * We have a wildcard in the pathname.
525 * Optimization for common case where the wildcard
526 * is in the last component and the client already
527 * sent the correct case.
529 status
= check_parent_exists(ctx
,
535 if (!NT_STATUS_IS_OK(status
)) {
541 * is_mangled() was changed to look at an entire pathname, not
542 * just a component. JRA.
545 if (mangle_is_mangled(start
, conn
->params
)) {
546 component_was_mangled
= True
;
550 * Now we need to recursively match the name against the real
551 * directory structure.
555 * Match each part of the path name separately, trying the names
556 * as is first, then trying to scan the directory for matching names.
559 for (; start
; start
= (end
?end
+1:(char *)NULL
)) {
561 * Pinpoint the end of this section of the filename.
563 /* mb safe. '/' can't be in any encoded char. */
564 end
= strchr(start
, '/');
567 * Chop the name at this point.
573 if (save_last_component
) {
574 TALLOC_FREE(smb_fname
->original_lcomp
);
575 smb_fname
->original_lcomp
= talloc_strdup(smb_fname
,
576 end
? end
+ 1 : start
);
577 if (!smb_fname
->original_lcomp
) {
578 DEBUG(0, ("talloc failed\n"));
579 status
= NT_STATUS_NO_MEMORY
;
584 /* The name cannot have a component of "." */
588 /* Error code at the end of a pathname. */
589 status
= NT_STATUS_OBJECT_NAME_INVALID
;
591 status
= determine_path_error(end
+1,
592 allow_wcard_last_component
);
597 /* The name cannot have a wildcard if it's not
598 the last component. */
600 name_has_wildcard
= ms_has_wild(start
);
602 /* Wildcards never valid within a pathname. */
603 if (name_has_wildcard
&& end
) {
604 status
= NT_STATUS_OBJECT_NAME_INVALID
;
608 /* Skip the stat call if it's a wildcard end. */
609 if (name_has_wildcard
) {
610 DEBUG(5,("Wildcard %s\n",start
));
615 * Check if the name exists up to this point.
618 if (posix_pathnames
) {
619 ret
= SMB_VFS_LSTAT(conn
, smb_fname
);
621 ret
= SMB_VFS_STAT(conn
, smb_fname
);
626 * It exists. it must either be a directory or this must
627 * be the last part of the path for it to be OK.
629 if (end
&& !S_ISDIR(smb_fname
->st
.st_ex_mode
)) {
631 * An intermediate part of the name isn't
634 DEBUG(5,("Not a dir %s\n",start
));
637 * We need to return the fact that the
638 * intermediate name resolution failed. This
639 * is used to return an error of ERRbadpath
640 * rather than ERRbadfile. Some Windows
641 * applications depend on the difference between
644 status
= NT_STATUS_OBJECT_PATH_NOT_FOUND
;
649 char *found_name
= NULL
;
651 /* Stat failed - ensure we don't use it. */
652 SET_STAT_INVALID(smb_fname
->st
);
655 * Reset errno so we can detect
656 * directory open errors.
661 * Try to find this part of the path in the directory.
664 if (name_has_wildcard
||
665 (get_real_filename(conn
, dirpath
, start
,
667 &found_name
) == -1)) {
672 * An intermediate part of the name
675 DEBUG(5,("Intermediate not found %s\n",
680 * We need to return the fact that the
681 * intermediate name resolution failed.
682 * This is used to return an error of
683 * ERRbadpath rather than ERRbadfile.
684 * Some Windows applications depend on
685 * the difference between these two
690 * ENOENT, ENOTDIR and ELOOP all map
691 * to NT_STATUS_OBJECT_PATH_NOT_FOUND
692 * in the filename walk.
695 if (errno
== ENOENT
||
699 NT_STATUS_OBJECT_PATH_NOT_FOUND
;
703 map_nt_error_from_unix(errno
);
709 * ENOENT/EACCESS are the only valid errors
710 * here. EACCESS needs handling here for
711 * "dropboxes", i.e. directories where users
712 * can only put stuff with permission -wx.
714 if ((errno
!= 0) && (errno
!= ENOENT
)
715 && (errno
!= EACCES
)) {
717 * ENOTDIR and ELOOP both map to
718 * NT_STATUS_OBJECT_PATH_NOT_FOUND
719 * in the filename walk.
721 if (errno
== ENOTDIR
||
724 NT_STATUS_OBJECT_PATH_NOT_FOUND
;
727 map_nt_error_from_unix(errno
);
733 * Just the last part of the name doesn't exist.
734 * We need to strupper() or strlower() it as
735 * this conversion may be used for file creation
736 * purposes. Fix inspired by
737 * Thomas Neumann <t.neumann@iku-ag.de>.
739 if (!conn
->case_preserve
||
740 (mangle_is_8_3(start
, False
,
742 !conn
->short_case_preserve
)) {
744 lp_defaultcase(SNUM(conn
)));
748 * check on the mangled stack to see if we can
749 * recover the base of the filename.
752 if (mangle_is_mangled(start
, conn
->params
)
753 && mangle_lookup_name_from_8_3(ctx
,
759 start
- smb_fname
->base_name
;
761 if (*dirpath
!= '\0') {
762 tmp
= talloc_asprintf(
765 TALLOC_FREE(unmangled
);
771 DEBUG(0, ("talloc failed\n"));
772 status
= NT_STATUS_NO_MEMORY
;
775 TALLOC_FREE(smb_fname
->base_name
);
776 smb_fname
->base_name
= tmp
;
778 smb_fname
->base_name
+ start_ofs
;
779 end
= start
+ strlen(start
);
782 DEBUG(5,("New file %s\n",start
));
788 * Restore the rest of the string. If the string was
789 * mangled the size may have changed.
794 start
- smb_fname
->base_name
;
796 if (*dirpath
!= '\0') {
797 tmp
= talloc_asprintf(smb_fname
,
802 tmp
= talloc_asprintf(smb_fname
,
807 DEBUG(0, ("talloc_asprintf failed\n"));
808 status
= NT_STATUS_NO_MEMORY
;
811 TALLOC_FREE(smb_fname
->base_name
);
812 smb_fname
->base_name
= tmp
;
813 start
= smb_fname
->base_name
+ start_ofs
;
814 end
= start
+ strlen(found_name
);
819 start
- smb_fname
->base_name
;
821 if (*dirpath
!= '\0') {
822 tmp
= talloc_asprintf(smb_fname
,
826 tmp
= talloc_strdup(smb_fname
,
830 DEBUG(0, ("talloc failed\n"));
831 status
= NT_STATUS_NO_MEMORY
;
834 TALLOC_FREE(smb_fname
->base_name
);
835 smb_fname
->base_name
= tmp
;
836 start
= smb_fname
->base_name
+ start_ofs
;
839 * We just scanned for, and found the end of
840 * the path. We must return a valid stat struct
844 if (posix_pathnames
) {
845 ret
= SMB_VFS_LSTAT(conn
, smb_fname
);
847 ret
= SMB_VFS_STAT(conn
, smb_fname
);
851 SET_STAT_INVALID(smb_fname
->st
);
855 TALLOC_FREE(found_name
);
861 * We should never provide different behaviors
862 * depending on DEVELOPER!!!
864 if (VALID_STAT(smb_fname
->st
)) {
868 status
= file_name_hash(conn
,
869 smb_fname_str_dbg(smb_fname
),
871 if (!NT_STATUS_IS_OK(status
)) {
875 get_file_infos(vfs_file_id_from_sbuf(conn
,
878 &delete_pending
, NULL
);
879 if (delete_pending
) {
880 status
= NT_STATUS_DELETE_PENDING
;
887 * Add to the dirpath that we have resolved so far.
890 if (*dirpath
!= '\0') {
891 char *tmp
= talloc_asprintf(ctx
,
892 "%s/%s", dirpath
, start
);
894 DEBUG(0, ("talloc_asprintf failed\n"));
895 status
= NT_STATUS_NO_MEMORY
;
898 TALLOC_FREE(dirpath
);
902 TALLOC_FREE(dirpath
);
903 if (!(dirpath
= talloc_strdup(ctx
,start
))) {
904 DEBUG(0, ("talloc_strdup failed\n"));
905 status
= NT_STATUS_NO_MEMORY
;
911 * Cache the dirpath thus far. Don't cache a name with mangled
912 * or wildcard components as this can change the size.
914 if(!component_was_mangled
&& !name_has_wildcard
) {
915 stat_cache_add(orig_path
, dirpath
,
916 conn
->case_sensitive
);
920 * Restore the / that we wiped out earlier.
928 * Cache the full path. Don't cache a name with mangled or wildcard
929 * components as this can change the size.
932 if(!component_was_mangled
&& !name_has_wildcard
) {
933 stat_cache_add(orig_path
, smb_fname
->base_name
,
934 conn
->case_sensitive
);
938 * The name has been resolved.
941 DEBUG(5,("conversion finished %s -> %s\n", orig_path
,
942 smb_fname
->base_name
));
945 /* Add back the stream if one was stripped off originally. */
946 if (stream
!= NULL
) {
947 smb_fname
->stream_name
= stream
;
949 /* Check path now that the base_name has been converted. */
950 status
= build_stream_path(ctx
, conn
, orig_path
, smb_fname
);
951 if (!NT_STATUS_IS_OK(status
)) {
955 TALLOC_FREE(dirpath
);
956 *smb_fname_out
= smb_fname
;
959 DEBUG(10, ("dirpath = [%s] start = [%s]\n", dirpath
, start
));
960 if (*dirpath
!= '\0') {
961 smb_fname
->base_name
= talloc_asprintf(smb_fname
, "%s/%s",
964 smb_fname
->base_name
= talloc_strdup(smb_fname
, start
);
966 if (!smb_fname
->base_name
) {
967 DEBUG(0, ("talloc_asprintf failed\n"));
968 status
= NT_STATUS_NO_MEMORY
;
972 *smb_fname_out
= smb_fname
;
973 TALLOC_FREE(dirpath
);
976 TALLOC_FREE(smb_fname
);
980 /****************************************************************************
981 Ensure a path is not vetod.
982 ****************************************************************************/
984 NTSTATUS
check_veto_path(connection_struct
*conn
, const char *name
)
986 if (IS_VETO_PATH(conn
, name
)) {
987 /* Is it not dot or dot dot. */
988 if (!(ISDOT(name
) || ISDOTDOT(name
))) {
989 DEBUG(5,("check_veto_path: file path name %s vetoed\n",
991 return map_nt_error_from_unix(ENOENT
);
997 /****************************************************************************
998 Check a filename - possibly calling check_reduced_name.
999 This is called by every routine before it allows an operation on a filename.
1000 It does any final confirmation necessary to ensure that the filename is
1001 a valid one for the user to access.
1002 ****************************************************************************/
1004 NTSTATUS
check_name(connection_struct
*conn
, const char *name
)
1006 NTSTATUS status
= check_veto_path(conn
, name
);
1008 if (!NT_STATUS_IS_OK(status
)) {
1012 if (!lp_widelinks(SNUM(conn
)) || !lp_symlinks(SNUM(conn
))) {
1013 status
= check_reduced_name(conn
,name
);
1014 if (!NT_STATUS_IS_OK(status
)) {
1015 DEBUG(5,("check_name: name %s failed with %s\n",name
,
1016 nt_errstr(status
)));
1021 return NT_STATUS_OK
;
1024 /****************************************************************************
1025 Must be called as root. Creates the struct privilege_paths
1026 attached to the struct smb_request if this call is successful.
1027 ****************************************************************************/
1029 static NTSTATUS
check_name_with_privilege(connection_struct
*conn
,
1030 struct smb_request
*smbreq
,
1033 NTSTATUS status
= check_veto_path(conn
, name
);
1035 if (!NT_STATUS_IS_OK(status
)) {
1038 return check_reduced_name_with_privilege(conn
,
1043 /****************************************************************************
1044 Check if two filenames are equal.
1045 This needs to be careful about whether we are case sensitive.
1046 ****************************************************************************/
1048 static bool fname_equal(const char *name1
, const char *name2
,
1049 bool case_sensitive
)
1051 /* Normal filename handling */
1052 if (case_sensitive
) {
1053 return(strcmp(name1
,name2
) == 0);
1056 return(strequal(name1
,name2
));
1059 /****************************************************************************
1060 Scan a directory to find a filename, matching without case sensitivity.
1061 If the name looks like a mangled name then try via the mangling functions
1062 ****************************************************************************/
1064 static int get_real_filename_full_scan(connection_struct
*conn
,
1065 const char *path
, const char *name
,
1067 TALLOC_CTX
*mem_ctx
, char **found_name
)
1069 struct smb_Dir
*cur_dir
;
1070 const char *dname
= NULL
;
1071 char *talloced
= NULL
;
1072 char *unmangled_name
= NULL
;
1075 /* handle null paths */
1076 if ((path
== NULL
) || (*path
== 0)) {
1080 /* If we have a case-sensitive filesystem, it doesn't do us any
1081 * good to search for a name. If a case variation of the name was
1082 * there, then the original stat(2) would have found it.
1084 if (!mangled
&& !(conn
->fs_capabilities
& FILE_CASE_SENSITIVE_SEARCH
)) {
1090 * The incoming name can be mangled, and if we de-mangle it
1091 * here it will not compare correctly against the filename (name2)
1092 * read from the directory and then mangled by the name_to_8_3()
1093 * call. We need to mangle both names or neither.
1096 * Fix for bug found by Dina Fine. If in case sensitive mode then
1097 * the mangle cache is no good (3 letter extension could be wrong
1098 * case - so don't demangle in this case - leave as mangled and
1099 * allow the mangling of the directory entry read (which is done
1100 * case insensitively) to match instead. This will lead to more
1101 * false positive matches but we fail completely without it. JRA.
1104 if (mangled
&& !conn
->case_sensitive
) {
1105 mangled
= !mangle_lookup_name_from_8_3(talloc_tos(), name
,
1109 /* Name is now unmangled. */
1110 name
= unmangled_name
;
1114 /* open the directory */
1115 if (!(cur_dir
= OpenDir(talloc_tos(), conn
, path
, NULL
, 0))) {
1116 DEBUG(3,("scan dir didn't open dir [%s]\n",path
));
1117 TALLOC_FREE(unmangled_name
);
1121 /* now scan for matching names */
1123 while ((dname
= ReadDirName(cur_dir
, &curpos
, NULL
, &talloced
))) {
1125 /* Is it dot or dot dot. */
1126 if (ISDOT(dname
) || ISDOTDOT(dname
)) {
1127 TALLOC_FREE(talloced
);
1132 * At this point dname is the unmangled name.
1133 * name is either mangled or not, depending on the state
1134 * of the "mangled" variable. JRA.
1138 * Check mangled name against mangled name, or unmangled name
1139 * against unmangled name.
1142 if ((mangled
&& mangled_equal(name
,dname
,conn
->params
)) ||
1143 fname_equal(name
, dname
, conn
->case_sensitive
)) {
1144 /* we've found the file, change it's name and return */
1145 *found_name
= talloc_strdup(mem_ctx
, dname
);
1146 TALLOC_FREE(unmangled_name
);
1147 TALLOC_FREE(cur_dir
);
1150 TALLOC_FREE(talloced
);
1153 TALLOC_FREE(talloced
);
1156 TALLOC_FREE(talloced
);
1159 TALLOC_FREE(unmangled_name
);
1160 TALLOC_FREE(cur_dir
);
1165 /****************************************************************************
1166 Wrapper around the vfs get_real_filename and the full directory scan
1168 ****************************************************************************/
1170 int get_real_filename(connection_struct
*conn
, const char *path
,
1171 const char *name
, TALLOC_CTX
*mem_ctx
,
1177 mangled
= mangle_is_mangled(name
, conn
->params
);
1180 return get_real_filename_full_scan(conn
, path
, name
, mangled
,
1181 mem_ctx
, found_name
);
1184 /* Try the vfs first to take advantage of case-insensitive stat. */
1185 ret
= SMB_VFS_GET_REAL_FILENAME(conn
, path
, name
, mem_ctx
, found_name
);
1188 * If the case-insensitive stat was successful, or returned an error
1189 * other than EOPNOTSUPP then there is no need to fall back on the
1190 * full directory scan.
1192 if (ret
== 0 || (ret
== -1 && errno
!= EOPNOTSUPP
)) {
1196 return get_real_filename_full_scan(conn
, path
, name
, mangled
, mem_ctx
,
1200 static NTSTATUS
build_stream_path(TALLOC_CTX
*mem_ctx
,
1201 connection_struct
*conn
,
1202 const char *orig_path
,
1203 struct smb_filename
*smb_fname
)
1206 unsigned int i
, num_streams
= 0;
1207 struct stream_struct
*streams
= NULL
;
1209 if (SMB_VFS_STAT(conn
, smb_fname
) == 0) {
1210 DEBUG(10, ("'%s' exists\n", smb_fname_str_dbg(smb_fname
)));
1211 return NT_STATUS_OK
;
1214 if (errno
!= ENOENT
) {
1215 DEBUG(10, ("vfs_stat failed: %s\n", strerror(errno
)));
1216 status
= map_nt_error_from_unix(errno
);
1220 /* Fall back to a case-insensitive scan of all streams on the file. */
1221 status
= vfs_streaminfo(conn
, NULL
, smb_fname
->base_name
, mem_ctx
,
1222 &num_streams
, &streams
);
1224 if (NT_STATUS_EQUAL(status
, NT_STATUS_OBJECT_NAME_NOT_FOUND
)) {
1225 SET_STAT_INVALID(smb_fname
->st
);
1226 return NT_STATUS_OK
;
1229 if (!NT_STATUS_IS_OK(status
)) {
1230 DEBUG(10, ("vfs_streaminfo failed: %s\n", nt_errstr(status
)));
1234 for (i
=0; i
<num_streams
; i
++) {
1235 DEBUG(10, ("comparing [%s] and [%s]: ",
1236 smb_fname
->stream_name
, streams
[i
].name
));
1237 if (fname_equal(smb_fname
->stream_name
, streams
[i
].name
,
1238 conn
->case_sensitive
)) {
1239 DEBUGADD(10, ("equal\n"));
1242 DEBUGADD(10, ("not equal\n"));
1245 /* Couldn't find the stream. */
1246 if (i
== num_streams
) {
1247 SET_STAT_INVALID(smb_fname
->st
);
1248 TALLOC_FREE(streams
);
1249 return NT_STATUS_OK
;
1252 DEBUG(10, ("case insensitive stream. requested: %s, actual: %s\n",
1253 smb_fname
->stream_name
, streams
[i
].name
));
1256 TALLOC_FREE(smb_fname
->stream_name
);
1257 smb_fname
->stream_name
= talloc_strdup(smb_fname
, streams
[i
].name
);
1258 if (smb_fname
->stream_name
== NULL
) {
1259 status
= NT_STATUS_NO_MEMORY
;
1263 SET_STAT_INVALID(smb_fname
->st
);
1265 if (SMB_VFS_STAT(conn
, smb_fname
) == 0) {
1266 DEBUG(10, ("'%s' exists\n", smb_fname_str_dbg(smb_fname
)));
1268 status
= NT_STATUS_OK
;
1270 TALLOC_FREE(streams
);
1275 * Go through all the steps to validate a filename.
1277 * @param ctx talloc_ctx to allocate memory with.
1278 * @param conn connection struct for vfs calls.
1279 * @param dfs_path Whether this path requires dfs resolution.
1280 * @param smbreq SMB request if we're using privileges.
1281 * @param name_in The unconverted name.
1282 * @param ucf_flags flags to pass through to unix_convert().
1283 * UCF_ALWAYS_ALLOW_WCARD_LCOMP will be OR'd in if
1284 * p_cont_wcard != NULL and is true and
1285 * UCF_COND_ALLOW_WCARD_LCOMP.
1286 * @param p_cont_wcard If not NULL, will be set to true if the dfs path
1287 * resolution detects a wildcard.
1288 * @param pp_smb_fname The final converted name will be allocated if the
1289 * return is NT_STATUS_OK.
1291 * @return NT_STATUS_OK if all operations completed succesfully, appropriate
1294 static NTSTATUS
filename_convert_internal(TALLOC_CTX
*ctx
,
1295 connection_struct
*conn
,
1297 struct smb_request
*smbreq
,
1298 const char *name_in
,
1300 bool *ppath_contains_wcard
,
1301 struct smb_filename
**pp_smb_fname
)
1304 bool allow_wcards
= (ucf_flags
& (UCF_COND_ALLOW_WCARD_LCOMP
|UCF_ALWAYS_ALLOW_WCARD_LCOMP
));
1307 *pp_smb_fname
= NULL
;
1309 status
= resolve_dfspath_wcard(ctx
, conn
,
1313 !conn
->sconn
->using_smb2
,
1315 ppath_contains_wcard
);
1316 if (!NT_STATUS_IS_OK(status
)) {
1317 DEBUG(10,("filename_convert_internal: resolve_dfspath failed "
1318 "for name %s with %s\n",
1320 nt_errstr(status
) ));
1324 if (is_fake_file_path(name_in
)) {
1328 status
= create_synthetic_smb_fname_split(ctx
,
1336 * If the caller conditionally allows wildcard lookups, only add the
1337 * always allow if the path actually does contain a wildcard.
1339 if (ucf_flags
& UCF_COND_ALLOW_WCARD_LCOMP
&&
1340 ppath_contains_wcard
!= NULL
&& *ppath_contains_wcard
) {
1341 ucf_flags
|= UCF_ALWAYS_ALLOW_WCARD_LCOMP
;
1344 status
= unix_convert(ctx
, conn
, fname
, pp_smb_fname
, ucf_flags
);
1345 if (!NT_STATUS_IS_OK(status
)) {
1346 DEBUG(10,("filename_convert_internal: unix_convert failed "
1347 "for name %s with %s\n",
1349 nt_errstr(status
) ));
1353 if ((ucf_flags
& UCF_UNIX_NAME_LOOKUP
) &&
1354 VALID_STAT((*pp_smb_fname
)->st
) &&
1355 S_ISLNK((*pp_smb_fname
)->st
.st_ex_mode
)) {
1356 return check_veto_path(conn
, (*pp_smb_fname
)->base_name
);
1360 status
= check_name(conn
, (*pp_smb_fname
)->base_name
);
1362 status
= check_name_with_privilege(conn
, smbreq
, (*pp_smb_fname
)->base_name
);
1364 if (!NT_STATUS_IS_OK(status
)) {
1365 DEBUG(3,("filename_convert_internal: check_name failed "
1366 "for name %s with %s\n",
1367 smb_fname_str_dbg(*pp_smb_fname
),
1368 nt_errstr(status
) ));
1369 TALLOC_FREE(*pp_smb_fname
);
1377 * Go through all the steps to validate a filename.
1381 NTSTATUS
filename_convert(TALLOC_CTX
*ctx
,
1382 connection_struct
*conn
,
1384 const char *name_in
,
1386 bool *ppath_contains_wcard
,
1387 struct smb_filename
**pp_smb_fname
)
1389 return filename_convert_internal(ctx
,
1395 ppath_contains_wcard
,
1400 * Go through all the steps to validate a filename.
1401 * root (privileged) version.
1404 NTSTATUS
filename_convert_with_privilege(TALLOC_CTX
*ctx
,
1405 connection_struct
*conn
,
1406 struct smb_request
*smbreq
,
1407 const char *name_in
,
1409 bool *ppath_contains_wcard
,
1410 struct smb_filename
**pp_smb_fname
)
1412 return filename_convert_internal(ctx
,
1414 smbreq
->flags2
& FLAGS2_DFS_PATHNAMES
,
1418 ppath_contains_wcard
,