2 Unix SMB/Netbios implementation.
4 filename handling routines
5 Copyright (C) Andrew Tridgell 1992-1998
6 Copyright (C) Jeremy Allison 1999-200
7 Copyright (C) Ying Chen 2000
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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 * New hash table stat cache code added by Ying Chen.
30 extern BOOL case_sensitive;
31 extern BOOL case_preserve;
32 extern BOOL short_case_preserve;
33 extern fstring remote_machine;
34 extern BOOL use_mangled_map;
36 static BOOL scan_directory(char *path, char *name,connection_struct *conn,BOOL docache);
38 /****************************************************************************
39 Check if two filenames are equal.
40 This needs to be careful about whether we are case sensitive.
41 ****************************************************************************/
42 static BOOL fname_equal(char *name1, char *name2)
44 int l1 = strlen(name1);
45 int l2 = strlen(name2);
47 /* handle filenames ending in a single dot */
48 if (l1-l2 == 1 && name1[l1-1] == '.' && lp_strip_dot())
52 ret = fname_equal(name1,name2);
57 if (l2-l1 == 1 && name2[l2-1] == '.' && lp_strip_dot())
61 ret = fname_equal(name1,name2);
66 /* now normal filename handling */
68 return(strcmp(name1,name2) == 0);
70 return(strequal(name1,name2));
74 /****************************************************************************
75 Mangle the 2nd name and check if it is then equal to the first name.
76 ****************************************************************************/
77 static BOOL mangled_equal(char *name1, char *name2)
82 if (is_8_3(name2, True))
84 tmpname = dos_mangle(name2);
86 ret = strequal(name1,tmpname);
93 /****************************************************************************
94 This routine is called to convert names from the dos namespace to unix
95 namespace. It needs to handle any case conversions, mangling, format
98 We assume that we have already done a chdir() to the right "root" directory
101 The function will return False if some part of the name except for the last
102 part cannot be resolved
104 If the saved_last_component != 0, then the unmodified last component
105 of the pathname is returned there. This is used in an exceptional
106 case in reply_mv (so far). If saved_last_component == 0 then nothing
109 The bad_path arg is set to True if the filename walk failed. This is
110 used to pick the correct error code to return between ENOENT and ENOTDIR
111 as Windows applications depend on ERRbadpath being returned if a component
112 of a pathname does not exist.
114 On exit from unix_convert, if *pst was not null, then the file stat
115 struct will be returned if the file exists and was found, if not this
116 stat struct will be filled with zeros (and this can be detected by checking
117 for nlinks = 0, which can never be true for any file).
118 ****************************************************************************/
120 BOOL unix_convert(char *name,connection_struct *conn,char *saved_last_component,
121 BOOL *bad_path, SMB_STRUCT_STAT *pst)
127 BOOL component_was_mangled = False;
128 BOOL name_has_wildcard = False;
134 if(saved_last_component)
135 *saved_last_component = 0;
138 /* we don't ever use the filenames on a printer share as a
139 filename - so don't convert them */
143 DEBUG(5, ("unix_convert called on file \"%s\"\n", name));
146 * Convert to basic unix format - removing \ chars and cleaning it up.
150 unix_clean_name(name);
153 * Names must be relative to the root of the service - trim any leading /.
154 * also trim trailing /'s.
157 trim_string(name,"/","/");
160 * If we trimmed down to a single '\0' character
161 * then we should use the "." directory to avoid
162 * searching the cache, but not if we are in a
172 * Ensure saved_last_component is valid even if file exists.
175 if(saved_last_component) {
176 end = strrchr_m(name, '/');
178 pstrcpy(saved_last_component, end + 1);
180 pstrcpy(saved_last_component, name);
183 if (!case_sensitive &&
184 (!case_preserve || (is_8_3(name, False) && !short_case_preserve)))
188 * If we trimmed down to a single '\0' character
189 * then we will be using the "." directory.
190 * As we know this is valid we can return true here.
197 while (strncmp(start,"./",2) == 0)
200 pstrcpy(orig_path, name);
202 if(stat_cache_lookup(conn, name, dirpath, &start, &st)) {
208 * stat the name - if it exists then we are all done!
211 if (vfs_stat(conn,name,&st) == 0) {
212 stat_cache_add(orig_path, name);
213 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
218 DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
219 name, dirpath, start));
222 * A special case - if we don't have any mangling chars and are case
223 * sensitive then searching won't help.
226 if (case_sensitive && !is_mangled(name) &&
227 !lp_strip_dot() && !use_mangled_map)
230 name_has_wildcard = ms_has_wild(start);
233 * is_mangled() was changed to look at an entire pathname, not
234 * just a component. JRA.
237 if(is_mangled(start))
238 component_was_mangled = True;
241 * Now we need to recursively match the name against the real
242 * directory structure.
246 * Match each part of the path name separately, trying the names
247 * as is first, then trying to scan the directory for matching names.
250 for (; start ; start = (end?end+1:(char *)NULL)) {
252 * Pinpoint the end of this section of the filename.
254 end = strchr_m(start, '/');
257 * Chop the name at this point.
262 if(saved_last_component != 0)
263 pstrcpy(saved_last_component, end ? end + 1 : start);
266 * Check if the name exists up to this point.
269 if (vfs_stat(conn,name, &st) == 0) {
271 * It exists. it must either be a directory or this must be
272 * the last part of the path for it to be OK.
274 if (end && !(st.st_mode & S_IFDIR)) {
276 * An intermediate part of the name isn't a directory.
278 DEBUG(5,("Not a dir %s\n",start));
286 /* Stat failed - ensure we don't use it. */
291 * Remember the rest of the pathname so it can be restored
299 * Try to find this part of the path in the directory.
302 if (ms_has_wild(start) || !scan_directory(dirpath, start, conn, end?True:False)) {
305 * An intermediate part of the name can't be found.
307 DEBUG(5,("Intermediate not found %s\n",start));
311 * We need to return the fact that the intermediate
312 * name resolution failed. This is used to return an
313 * error of ERRbadpath rather than ERRbadfile. Some
314 * Windows applications depend on the difference between
322 * Just the last part of the name doesn't exist.
323 * We may need to strupper() or strlower() it in case
324 * this conversion is being used for file creation
325 * purposes. If the filename is of mixed case then
326 * don't normalise it.
329 if (!case_preserve && (!strhasupper(start) || !strhaslower(start)))
333 * check on the mangled stack to see if we can recover the
334 * base of the filename.
337 if (is_mangled(start)) {
338 check_mangled_cache( start );
341 DEBUG(5,("New file %s\n",start));
346 * Restore the rest of the string.
349 pstrcpy(start+strlen(start)+1,rest);
350 end = start + strlen(start);
355 * Add to the dirpath that we have resolved so far.
358 pstrcat(dirpath,"/");
360 pstrcat(dirpath,start);
363 * Don't cache a name with mangled or wildcard components
364 * as this can change the size.
367 if(!component_was_mangled && !name_has_wildcard)
368 stat_cache_add(orig_path, dirpath);
371 * Restore the / that we wiped out earlier.
378 * Don't cache a name with mangled or wildcard components
379 * as this can change the size.
382 if(!component_was_mangled && !name_has_wildcard)
383 stat_cache_add(orig_path, name);
386 * If we ended up resolving the entire path then return a valid
387 * stat struct if we got one.
390 if (VALID_STAT(st) && (strlen(orig_path) == strlen(name)))
394 * The name has been resolved.
397 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
402 /****************************************************************************
403 check a filename - possibly caling reducename
405 This is called by every routine before it allows an operation on a filename.
406 It does any final confirmation necessary to ensure that the filename is
407 a valid one for the user to access.
408 ****************************************************************************/
409 BOOL check_name(char *name,connection_struct *conn)
415 if (IS_VETO_PATH(conn, name)) {
416 DEBUG(5,("file path name %s vetoed\n",name));
420 ret = reduce_name(conn,name,conn->connectpath,lp_widelinks(SNUM(conn)));
422 /* Check if we are allowing users to follow symlinks */
423 /* Patch from David Clerc <David.Clerc@cui.unige.ch>
424 University of Geneva */
427 if (!lp_symlinks(SNUM(conn))) {
428 SMB_STRUCT_STAT statbuf;
429 if ( (conn->vfs_ops.lstat(conn,name,&statbuf) != -1) &&
430 (S_ISLNK(statbuf.st_mode)) ) {
431 DEBUG(3,("check_name: denied: file path name %s is a symlink\n",name));
438 DEBUG(5,("check_name on %s failed\n",name));
444 /****************************************************************************
445 scan a directory to find a filename, matching without case sensitivity
447 If the name looks like a mangled name then try via the mangling functions
448 ****************************************************************************/
449 static BOOL scan_directory(char *path, char *name,connection_struct *conn,BOOL docache)
456 mangled = is_mangled(name);
458 /* handle null paths */
462 if (docache && (dname = DirCacheCheck(path,name,SNUM(conn)))) {
463 pstrcpy(name, dname);
468 * The incoming name can be mangled, and if we de-mangle it
469 * here it will not compare correctly against the filename (name2)
470 * read from the directory and then mangled by the name_map_mangle()
471 * call. We need to mangle both names or neither.
475 mangled = !check_mangled_cache( name );
477 /* open the directory */
478 if (!(cur_dir = OpenDir(conn, path, True))) {
479 DEBUG(3,("scan dir didn't open dir [%s]\n",path));
483 /* now scan for matching names */
484 while ((dname = ReadDirName(cur_dir))) {
485 if (*dname == '.' && (strequal(dname,".") || strequal(dname,"..")))
488 pstrcpy(name2,dname);
489 if (!name_map_mangle(name2,False,True,SNUM(conn)))
492 if ((mangled && mangled_equal(name,name2)) || fname_equal(name, name2)) {
493 /* we've found the file, change it's name and return */
495 DirCacheAdd(path,name,dname,SNUM(conn));
496 pstrcpy(name, dname);