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 int DEBUGLEVEL;
31 extern BOOL case_sensitive;
32 extern BOOL case_preserve;
33 extern BOOL short_case_preserve;
34 extern fstring remote_machine;
35 extern BOOL use_mangled_map;
37 static BOOL scan_directory(char *path, char *name,connection_struct *conn,BOOL docache);
39 /****************************************************************************
40 Check if two filenames are equal.
41 This needs to be careful about whether we are case sensitive.
42 ****************************************************************************/
43 static BOOL fname_equal(char *name1, char *name2)
45 int l1 = strlen(name1);
46 int l2 = strlen(name2);
48 /* handle filenames ending in a single dot */
49 if (l1-l2 == 1 && name1[l1-1] == '.' && lp_strip_dot())
53 ret = fname_equal(name1,name2);
58 if (l2-l1 == 1 && name2[l2-1] == '.' && lp_strip_dot())
62 ret = fname_equal(name1,name2);
67 /* now normal filename handling */
69 return(strcmp(name1,name2) == 0);
71 return(strequal(name1,name2));
75 /****************************************************************************
76 Mangle the 2nd name and check if it is then equal to the first name.
77 ****************************************************************************/
78 static BOOL mangled_equal(char *name1, char *name2)
82 if (is_8_3(name2, True))
85 pstrcpy(tmpname,name2);
86 mangle_name_83(tmpname);
88 return(strequal(name1,tmpname));
92 /****************************************************************************
93 This routine is called to convert names from the dos namespace to unix
94 namespace. It needs to handle any case conversions, mangling, format
97 We assume that we have already done a chdir() to the right "root" directory
100 The function will return False if some part of the name except for the last
101 part cannot be resolved
103 If the saved_last_component != 0, then the unmodified last component
104 of the pathname is returned there. This is used in an exceptional
105 case in reply_mv (so far). If saved_last_component == 0 then nothing
108 The bad_path arg is set to True if the filename walk failed. This is
109 used to pick the correct error code to return between ENOENT and ENOTDIR
110 as Windows applications depend on ERRbadpath being returned if a component
111 of a pathname does not exist.
113 On exit from unix_convert, if *pst was not null, then the file stat
114 struct will be returned if the file exists and was found, if not this
115 stat struct will be filled with zeros (and this can be detected by checking
116 for nlinks = 0, which can never be true for any file).
117 ****************************************************************************/
119 BOOL unix_convert(char *name,connection_struct *conn,char *saved_last_component,
120 BOOL *bad_path, SMB_STRUCT_STAT *pst)
126 BOOL component_was_mangled = False;
127 BOOL name_has_wildcard = False;
129 /* Andrew's conservative code... JRA. */
130 extern char magic_char;
137 if(saved_last_component)
138 *saved_last_component = 0;
141 /* we don't ever use the filenames on a printer share as a
142 filename - so don't convert them */
146 DEBUG(5, ("unix_convert called on file \"%s\"\n", name));
149 * Convert to basic unix format - removing \ chars and cleaning it up.
153 unix_clean_name(name);
156 * Names must be relative to the root of the service - trim any leading /.
157 * also trim trailing /'s.
160 trim_string(name,"/","/");
163 * If we trimmed down to a single '\0' character
164 * then we should use the "." directory to avoid
165 * searching the cache, but not if we are in a
175 * Ensure saved_last_component is valid even if file exists.
178 if(saved_last_component) {
179 end = strrchr(name, '/');
181 pstrcpy(saved_last_component, end + 1);
183 pstrcpy(saved_last_component, name);
186 if (!case_sensitive &&
187 (!case_preserve || (is_8_3(name, False) && !short_case_preserve)))
191 * If we trimmed down to a single '\0' character
192 * then we will be using the "." directory.
193 * As we know this is valid we can return true here.
200 while (strncmp(start,"./",2) == 0)
203 pstrcpy(orig_path, name);
205 if(stat_cache_lookup(conn, name, dirpath, &start, &st)) {
211 * stat the name - if it exists then we are all done!
214 if (vfs_stat(conn,name,&st) == 0) {
215 stat_cache_add(orig_path, name);
216 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
221 DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
222 name, dirpath, start));
225 * A special case - if we don't have any mangling chars and are case
226 * sensitive then searching won't help.
229 if (case_sensitive && !is_mangled(name) &&
230 !lp_strip_dot() && !use_mangled_map)
233 name_has_wildcard = ms_has_wild(start);
236 * is_mangled() was changed to look at an entire pathname, not
237 * just a component. JRA.
240 if(is_mangled(start))
241 component_was_mangled = True;
244 /* Keep Andrew's conservative code around, just in case. JRA. */
245 /* this is an extremely conservative test for mangled names. */
246 if (strchr(start,magic_char))
247 component_was_mangled = True;
251 * Now we need to recursively match the name against the real
252 * directory structure.
256 * Match each part of the path name separately, trying the names
257 * as is first, then trying to scan the directory for matching names.
260 for (; start ; start = (end?end+1:(char *)NULL)) {
262 * Pinpoint the end of this section of the filename.
264 end = strchr(start, '/');
267 * Chop the name at this point.
272 if(saved_last_component != 0)
273 pstrcpy(saved_last_component, end ? end + 1 : start);
276 * Check if the name exists up to this point.
279 if (vfs_stat(conn,name, &st) == 0) {
281 * It exists. it must either be a directory or this must be
282 * the last part of the path for it to be OK.
284 if (end && !(st.st_mode & S_IFDIR)) {
286 * An intermediate part of the name isn't a directory.
288 DEBUG(5,("Not a dir %s\n",start));
296 /* Stat failed - ensure we don't use it. */
301 * Remember the rest of the pathname so it can be restored
309 * Try to find this part of the path in the directory.
312 if (ms_has_wild(start) || !scan_directory(dirpath, start, conn, end?True:False)) {
315 * An intermediate part of the name can't be found.
317 DEBUG(5,("Intermediate not found %s\n",start));
321 * We need to return the fact that the intermediate
322 * name resolution failed. This is used to return an
323 * error of ERRbadpath rather than ERRbadfile. Some
324 * Windows applications depend on the difference between
332 * Just the last part of the name doesn't exist.
333 * We may need to strupper() or strlower() it in case
334 * this conversion is being used for file creation
335 * purposes. If the filename is of mixed case then
336 * don't normalise it.
339 if (!case_preserve && (!strhasupper(start) || !strhaslower(start)))
343 * check on the mangled stack to see if we can recover the
344 * base of the filename.
347 if (is_mangled(start)) {
348 check_mangled_cache( start );
351 DEBUG(5,("New file %s\n",start));
356 * Restore the rest of the string.
359 pstrcpy(start+strlen(start)+1,rest);
360 end = start + strlen(start);
365 * Add to the dirpath that we have resolved so far.
368 pstrcat(dirpath,"/");
370 pstrcat(dirpath,start);
373 * Don't cache a name with mangled or wildcard components
374 * as this can change the size.
377 if(!component_was_mangled && !name_has_wildcard)
378 stat_cache_add(orig_path, dirpath);
381 * Restore the / that we wiped out earlier.
388 * Don't cache a name with mangled or wildcard components
389 * as this can change the size.
392 if(!component_was_mangled && !name_has_wildcard)
393 stat_cache_add(orig_path, name);
396 * If we ended up resolving the entire path then return a valid
397 * stat struct if we got one.
400 if (VALID_STAT(st) && (strlen(orig_path) == strlen(name)))
404 * The name has been resolved.
407 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
412 /****************************************************************************
413 check a filename - possibly caling reducename
415 This is called by every routine before it allows an operation on a filename.
416 It does any final confirmation necessary to ensure that the filename is
417 a valid one for the user to access.
418 ****************************************************************************/
419 BOOL check_name(char *name,connection_struct *conn)
425 if (IS_VETO_PATH(conn, name)) {
426 DEBUG(5,("file path name %s vetoed\n",name));
430 ret = reduce_name(conn,name,conn->connectpath,lp_widelinks(SNUM(conn)));
432 /* Check if we are allowing users to follow symlinks */
433 /* Patch from David Clerc <David.Clerc@cui.unige.ch>
434 University of Geneva */
437 if (!lp_symlinks(SNUM(conn))) {
438 SMB_STRUCT_STAT statbuf;
439 if ( (conn->vfs_ops.lstat(conn,name,&statbuf) != -1) &&
440 (S_ISLNK(statbuf.st_mode)) ) {
441 DEBUG(3,("check_name: denied: file path name %s is a symlink\n",name));
448 DEBUG(5,("check_name on %s failed\n",name));
454 /****************************************************************************
455 scan a directory to find a filename, matching without case sensitivity
457 If the name looks like a mangled name then try via the mangling functions
458 ****************************************************************************/
459 static BOOL scan_directory(char *path, char *name,connection_struct *conn,BOOL docache)
466 mangled = is_mangled(name);
468 /* handle null paths */
472 if (docache && (dname = DirCacheCheck(path,name,SNUM(conn)))) {
473 pstrcpy(name, dname);
478 * The incoming name can be mangled, and if we de-mangle it
479 * here it will not compare correctly against the filename (name2)
480 * read from the directory and then mangled by the name_map_mangle()
481 * call. We need to mangle both names or neither.
485 mangled = !check_mangled_cache( name );
487 /* open the directory */
488 if (!(cur_dir = OpenDir(conn, path, True))) {
489 DEBUG(3,("scan dir didn't open dir [%s]\n",path));
493 /* now scan for matching names */
494 while ((dname = ReadDirName(cur_dir))) {
495 if (*dname == '.' && (strequal(dname,".") || strequal(dname,"..")))
498 pstrcpy(name2,dname);
499 if (!name_map_mangle(name2,False,True,SNUM(conn)))
502 if ((mangled && mangled_equal(name,name2)) || fname_equal(name, name2)) {
503 /* we've found the file, change it's name and return */
505 DirCacheAdd(path,name,dname,SNUM(conn));
506 pstrcpy(name, dname);