2 Unix SMB/CIFS implementation.
3 filename handling routines
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1999-2004
6 Copyright (C) Ying Chen 2000
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 * New hash table stat cache code added by Ying Chen.
29 static BOOL scan_directory(connection_struct *conn, const char *path, char *name,size_t maxlength);
31 /****************************************************************************
32 Check if two filenames are equal.
33 This needs to be careful about whether we are case sensitive.
34 ****************************************************************************/
36 static BOOL fname_equal(const char *name1, const char *name2, BOOL case_sensitive)
38 /* Normal filename handling */
40 return(strcmp(name1,name2) == 0);
42 return(strequal(name1,name2));
45 /****************************************************************************
46 Mangle the 2nd name and check if it is then equal to the first name.
47 ****************************************************************************/
49 static BOOL mangled_equal(const char *name1, const char *name2, int snum)
53 pstrcpy(tmpname, name2);
54 mangle_map(tmpname, True, False, snum);
55 return strequal(name1, tmpname);
58 /****************************************************************************
59 This routine is called to convert names from the dos namespace to unix
60 namespace. It needs to handle any case conversions, mangling, format
63 We assume that we have already done a chdir() to the right "root" directory
66 The function will return False if some part of the name except for the last
67 part cannot be resolved
69 If the saved_last_component != 0, then the unmodified last component
70 of the pathname is returned there. This is used in an exceptional
71 case in reply_mv (so far). If saved_last_component == 0 then nothing
74 The bad_path arg is set to True if the filename walk failed. This is
75 used to pick the correct error code to return between ENOENT and ENOTDIR
76 as Windows applications depend on ERRbadpath being returned if a component
77 of a pathname does not exist.
79 On exit from unix_convert, if *pst was not null, then the file stat
80 struct will be returned if the file exists and was found, if not this
81 stat struct will be filled with zeros (and this can be detected by checking
82 for nlinks = 0, which can never be true for any file).
83 ****************************************************************************/
85 BOOL unix_convert(pstring name,connection_struct *conn,char *saved_last_component,
86 BOOL *bad_path, SMB_STRUCT_STAT *pst)
92 BOOL component_was_mangled = False;
93 BOOL name_has_wildcard = False;
95 SET_STAT_INVALID(*pst);
99 if(saved_last_component)
100 *saved_last_component = 0;
103 /* we don't ever use the filenames on a printer share as a
104 filename - so don't convert them */
108 DEBUG(5, ("unix_convert called on file \"%s\"\n", name));
111 * Conversion to basic unix format is already done in check_path_syntax().
115 * Names must be relative to the root of the service - any leading /.
116 * and trailing /'s should have been trimmed by check_path_syntax().
120 SMB_ASSERT(*name != '/');
124 * If we trimmed down to a single '\0' character
125 * then we should use the "." directory to avoid
126 * searching the cache, but not if we are in a
128 * As we know this is valid we can return true here.
134 if (SMB_VFS_STAT(conn,name,&st) == 0) {
137 DEBUG(5,("conversion finished \"\" -> %s\n",name));
142 * Ensure saved_last_component is valid even if file exists.
145 if(saved_last_component) {
146 end = strrchr_m(name, '/');
148 pstrcpy(saved_last_component, end + 1);
150 pstrcpy(saved_last_component, name);
154 pstrcpy(orig_path, name);
156 if(!conn->case_sensitive && stat_cache_lookup(conn, name, dirpath, &start, &st)) {
162 * stat the name - if it exists then we are all done!
165 if (SMB_VFS_STAT(conn,name,&st) == 0) {
166 stat_cache_add(orig_path, name, conn->case_sensitive);
167 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
172 DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n", name, dirpath, start));
175 * A special case - if we don't have any mangling chars and are case
176 * sensitive then searching won't help.
179 if (conn->case_sensitive && !mangle_is_mangled(name, SNUM(conn)) && !*lp_mangled_map(SNUM(conn)))
182 name_has_wildcard = ms_has_wild(start);
185 * is_mangled() was changed to look at an entire pathname, not
186 * just a component. JRA.
189 if (mangle_is_mangled(start, SNUM(conn)))
190 component_was_mangled = True;
193 * Now we need to recursively match the name against the real
194 * directory structure.
198 * Match each part of the path name separately, trying the names
199 * as is first, then trying to scan the directory for matching names.
202 for (; start ; start = (end?end+1:(char *)NULL)) {
204 * Pinpoint the end of this section of the filename.
206 end = strchr_m(start, '/');
209 * Chop the name at this point.
214 if(saved_last_component != 0)
215 pstrcpy(saved_last_component, end ? end + 1 : start);
218 * Check if the name exists up to this point.
221 if (SMB_VFS_STAT(conn,name, &st) == 0) {
223 * It exists. it must either be a directory or this must be
224 * the last part of the path for it to be OK.
226 if (end && !(st.st_mode & S_IFDIR)) {
228 * An intermediate part of the name isn't a directory.
230 DEBUG(5,("Not a dir %s\n",start));
233 * We need to return the fact that the intermediate
234 * name resolution failed. This is used to return an
235 * error of ERRbadpath rather than ERRbadfile. Some
236 * Windows applications depend on the difference between
246 * We just scanned for, and found the end of the path.
247 * We must return the valid stat struct.
257 /* Stat failed - ensure we don't use it. */
258 SET_STAT_INVALID(st);
262 * Remember the rest of the pathname so it can be restored
269 /* Reset errno so we can detect directory open errors. */
273 * Try to find this part of the path in the directory.
276 if (ms_has_wild(start) ||
277 !scan_directory(conn, dirpath, start, sizeof(pstring) - 1 - (start - name))) {
280 * An intermediate part of the name can't be found.
282 DEBUG(5,("Intermediate not found %s\n",start));
286 * We need to return the fact that the intermediate
287 * name resolution failed. This is used to return an
288 * error of ERRbadpath rather than ERRbadfile. Some
289 * Windows applications depend on the difference between
296 if (errno == ENOTDIR) {
302 * Just the last part of the name doesn't exist.
303 * We need to strupper() or strlower() it as
304 * this conversion may be used for file creation
305 * purposes. Fix inspired by Thomas Neumann <t.neumann@iku-ag.de>.
307 if (!conn->case_preserve ||
308 (mangle_is_8_3(start, False, SNUM(conn)) &&
309 !conn->short_case_preserve)) {
310 strnorm(start, lp_defaultcase(SNUM(conn)));
314 * check on the mangled stack to see if we can recover the
315 * base of the filename.
318 if (mangle_is_mangled(start, SNUM(conn))) {
319 mangle_check_cache( start, sizeof(pstring) - 1 - (start - name), SNUM(conn));
322 DEBUG(5,("New file %s\n",start));
327 * Restore the rest of the string. If the string was mangled the size
331 end = start + strlen(start);
332 if (!safe_strcat(start, "/", sizeof(pstring) - 1 - (start - name)) ||
333 !safe_strcat(start, rest, sizeof(pstring) - 1 - (start - name))) {
339 * We just scanned for, and found the end of the path.
340 * We must return a valid stat struct if it exists.
344 if (SMB_VFS_STAT(conn,name, &st) == 0) {
347 SET_STAT_INVALID(st);
353 * Add to the dirpath that we have resolved so far.
356 pstrcat(dirpath,"/");
358 pstrcat(dirpath,start);
361 * Don't cache a name with mangled or wildcard components
362 * as this can change the size.
365 if(!component_was_mangled && !name_has_wildcard)
366 stat_cache_add(orig_path, dirpath, conn->case_sensitive);
369 * Restore the / that we wiped out earlier.
376 * Don't cache a name with mangled or wildcard components
377 * as this can change the size.
380 if(!component_was_mangled && !name_has_wildcard)
381 stat_cache_add(orig_path, name, conn->case_sensitive);
384 * The name has been resolved.
387 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
391 /****************************************************************************
392 Check a filename - possibly caling reducename.
393 This is called by every routine before it allows an operation on a filename.
394 It does any final confirmation necessary to ensure that the filename is
395 a valid one for the user to access.
396 ****************************************************************************/
398 BOOL check_name(const pstring name,connection_struct *conn)
402 if (IS_VETO_PATH(conn, name)) {
403 /* Is it not dot or dot dot. */
404 if (!((name[0] == '.') && (!name[1] || (name[1] == '.' && !name[2])))) {
405 DEBUG(5,("file path name %s vetoed\n",name));
411 if (!lp_widelinks(SNUM(conn)) || !lp_symlinks(SNUM(conn))) {
412 ret = reduce_name(conn,name);
416 DEBUG(5,("check_name on %s failed\n",name));
422 /****************************************************************************
423 Scan a directory to find a filename, matching without case sensitivity.
424 If the name looks like a mangled name then try via the mangling functions
425 ****************************************************************************/
427 static BOOL scan_directory(connection_struct *conn, const char *path, char *name, size_t maxlength)
429 struct smb_Dir *cur_dir;
434 mangled = mangle_is_mangled(name, SNUM(conn));
436 /* handle null paths */
441 * The incoming name can be mangled, and if we de-mangle it
442 * here it will not compare correctly against the filename (name2)
443 * read from the directory and then mangled by the mangle_map()
444 * call. We need to mangle both names or neither.
447 * Fix for bug found by Dina Fine. If in case sensitive mode then
448 * the mangle cache is no good (3 letter extension could be wrong
449 * case - so don't demangle in this case - leave as mangled and
450 * allow the mangling of the directory entry read (which is done
451 * case insensitively) to match instead. This will lead to more
452 * false positive matches but we fail completely without it. JRA.
455 if (mangled && !conn->case_sensitive) {
456 mangled = !mangle_check_cache( name, maxlength, SNUM(conn));
459 /* open the directory */
460 if (!(cur_dir = OpenDir(conn, path, NULL, 0))) {
461 DEBUG(3,("scan dir didn't open dir [%s]\n",path));
465 /* now scan for matching names */
467 while ((dname = ReadDirName(cur_dir, &curpos))) {
469 /* Is it dot or dot dot. */
470 if ((dname[0] == '.') && (!dname[1] || (dname[1] == '.' && !dname[2]))) {
475 * At this point dname is the unmangled name.
476 * name is either mangled or not, depending on the state of the "mangled"
481 * Check mangled name against mangled name, or unmangled name
482 * against unmangled name.
485 if ((mangled && mangled_equal(name,dname,SNUM(conn))) || fname_equal(name, dname, conn->case_sensitive)) {
486 /* we've found the file, change it's name and return */
487 safe_strcpy(name, dname, maxlength);