2 Unix SMB/Netbios implementation.
4 filename handling routines
5 Copyright (C) Andrew Tridgell 1992-1998
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 2 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, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 extern int DEBUGLEVEL;
25 extern BOOL case_sensitive;
26 extern BOOL case_preserve;
27 extern BOOL short_case_preserve;
28 extern fstring remote_machine;
29 extern BOOL use_mangled_map;
31 static BOOL scan_directory(char *path, char *name,connection_struct *conn,BOOL docache);
33 /****************************************************************************
34 Check if two filenames are equal.
35 This needs to be careful about whether we are case sensitive.
36 ****************************************************************************/
37 static BOOL fname_equal(char *name1, char *name2)
39 int l1 = strlen(name1);
40 int l2 = strlen(name2);
42 /* handle filenames ending in a single dot */
43 if (l1-l2 == 1 && name1[l1-1] == '.' && lp_strip_dot())
47 ret = fname_equal(name1,name2);
52 if (l2-l1 == 1 && name2[l2-1] == '.' && lp_strip_dot())
56 ret = fname_equal(name1,name2);
61 /* now normal filename handling */
63 return(strcmp(name1,name2) == 0);
65 return(strequal(name1,name2));
69 /****************************************************************************
70 Mangle the 2nd name and check if it is then equal to the first name.
71 ****************************************************************************/
72 static BOOL mangled_equal(char *name1, char *name2)
76 if (is_8_3(name2, True))
79 pstrcpy(tmpname,name2);
80 mangle_name_83(tmpname);
82 return(strequal(name1,tmpname));
85 /****************************************************************************
86 Stat cache code used in unix_convert.
87 *****************************************************************************/
89 static int global_stat_cache_lookups;
90 static int global_stat_cache_misses;
91 static int global_stat_cache_hits;
93 /****************************************************************************
94 Stat cache statistics code.
95 *****************************************************************************/
97 void print_stat_cache_statistics(void)
99 double eff = (100.0* (double)global_stat_cache_hits)/(double)global_stat_cache_lookups;
101 DEBUG(0,("stat cache stats: lookups = %d, hits = %d, misses = %d, \
102 stat cache was %f%% effective.\n", global_stat_cache_lookups,
103 global_stat_cache_hits, global_stat_cache_misses, eff ));
110 pstring translated_name;
113 #define MAX_STAT_CACHE_SIZE 50
115 static ubi_dlList stat_cache = { NULL, (ubi_dlNodePtr)&stat_cache, 0};
117 /****************************************************************************
118 Compare a pathname to a name in the stat cache - of a given length.
119 Note - this code always checks that the next character in the pathname
120 is either a '/' character, or a '\0' character - to ensure we only
121 match *full* pathname components. Note we don't need to handle case
122 here, if we're case insensitive the stat cache orig names are all upper
124 *****************************************************************************/
126 static BOOL stat_name_equal_len( char *stat_name, char *orig_name, int len)
128 BOOL matched = (memcmp( stat_name, orig_name, len) == 0);
129 if(orig_name[len] != '/' && orig_name[len] != '\0')
135 /****************************************************************************
136 Add an entry into the stat cache.
137 *****************************************************************************/
139 static void stat_cache_add( char *full_orig_name, char *orig_translated_path)
141 stat_cache_entry *scp;
143 pstring translated_path;
146 if (!lp_stat_cache()) return;
148 namelen = strlen(orig_translated_path);
151 * Don't cache trivial valid directory entries.
153 if((*full_orig_name == '\0') || (strcmp(full_orig_name, ".") == 0) ||
154 (strcmp(full_orig_name, "..") == 0))
158 * If we are in case insentive mode, we need to
159 * store names that need no translation - else, it
163 if(case_sensitive && (strcmp(full_orig_name, orig_translated_path) == 0))
167 * Remove any trailing '/' characters from the
171 pstrcpy(translated_path, orig_translated_path);
172 if(translated_path[namelen-1] == '/') {
173 translated_path[namelen-1] = '\0';
178 * We will only replace namelen characters
180 * StrnCpy always null terminates.
183 StrnCpy(orig_name, full_orig_name, namelen);
185 strupper( orig_name );
188 * Check this name doesn't exist in the cache before we
192 for( scp = (stat_cache_entry *)ubi_dlFirst( &stat_cache); scp;
193 scp = (stat_cache_entry *)ubi_dlNext( scp )) {
194 if((strcmp( scp->orig_name, orig_name) == 0) &&
195 (strcmp( scp->translated_name, translated_path) == 0)) {
197 * Name does exist - promote it.
199 if( (stat_cache_entry *)ubi_dlFirst( &stat_cache) != scp ) {
200 ubi_dlRemThis( &stat_cache, scp);
201 ubi_dlAddHead( &stat_cache, scp);
207 if((scp = (stat_cache_entry *)malloc(sizeof(stat_cache_entry))) == NULL) {
208 DEBUG(0,("stat_cache_add: Out of memory !\n"));
212 pstrcpy(scp->orig_name, orig_name);
213 pstrcpy(scp->translated_name, translated_path);
214 scp->name_len = namelen;
216 ubi_dlAddHead( &stat_cache, scp);
218 DEBUG(10,("stat_cache_add: Added entry %s -> %s\n", scp->orig_name, scp->translated_name ));
220 if(ubi_dlCount(&stat_cache) > lp_stat_cache_size()) {
221 scp = (stat_cache_entry *)ubi_dlRemTail( &stat_cache );
227 /****************************************************************************
228 Look through the stat cache for an entry - promote it to the top if found.
229 Return True if we translated (and did a scuccessful stat on) the entire name.
230 *****************************************************************************/
232 static BOOL stat_cache_lookup( char *name, char *dirpath, char **start, SMB_STRUCT_STAT *pst)
234 stat_cache_entry *scp;
235 stat_cache_entry *longest_hit = NULL;
239 if (!lp_stat_cache()) return False;
241 namelen = strlen(name);
244 global_stat_cache_lookups++;
247 * Don't lookup trivial valid directory entries.
249 if((*name == '\0') || (strcmp(name, ".") == 0) || (strcmp(name, "..") == 0)) {
250 global_stat_cache_misses++;
254 pstrcpy(chk_name, name);
256 strupper( chk_name );
258 for( scp = (stat_cache_entry *)ubi_dlFirst( &stat_cache); scp;
259 scp = (stat_cache_entry *)ubi_dlNext( scp )) {
260 if(scp->name_len <= namelen) {
261 if(stat_name_equal_len(scp->orig_name, chk_name, scp->name_len)) {
262 if((longest_hit == NULL) || (longest_hit->name_len <= scp->name_len))
268 if(longest_hit == NULL) {
269 DEBUG(10,("stat_cache_lookup: cache miss on %s\n", name));
270 global_stat_cache_misses++;
274 global_stat_cache_hits++;
276 DEBUG(10,("stat_cache_lookup: cache hit for name %s. %s -> %s\n",
277 name, longest_hit->orig_name, longest_hit->translated_name ));
280 * longest_hit is the longest match we got in the list.
281 * Check it exists - if so, overwrite the original name
282 * and then promote it to the top.
285 if(dos_stat( longest_hit->translated_name, pst) != 0) {
287 * Discard this entry.
289 ubi_dlRemThis( &stat_cache, longest_hit);
290 free((char *)longest_hit);
294 memcpy(name, longest_hit->translated_name, longest_hit->name_len);
295 if( (stat_cache_entry *)ubi_dlFirst( &stat_cache) != longest_hit ) {
296 ubi_dlRemThis( &stat_cache, longest_hit);
297 ubi_dlAddHead( &stat_cache, longest_hit);
300 *start = &name[longest_hit->name_len];
304 StrnCpy( dirpath, longest_hit->translated_name, name - (*start));
306 return (namelen == longest_hit->name_len);
309 /****************************************************************************
310 This routine is called to convert names from the dos namespace to unix
311 namespace. It needs to handle any case conversions, mangling, format
314 We assume that we have already done a chdir() to the right "root" directory
317 The function will return False if some part of the name except for the last
318 part cannot be resolved
320 If the saved_last_component != 0, then the unmodified last component
321 of the pathname is returned there. This is used in an exceptional
322 case in reply_mv (so far). If saved_last_component == 0 then nothing
325 The bad_path arg is set to True if the filename walk failed. This is
326 used to pick the correct error code to return between ENOENT and ENOTDIR
327 as Windows applications depend on ERRbadpath being returned if a component
328 of a pathname does not exist.
329 ****************************************************************************/
331 BOOL unix_convert(char *name,connection_struct *conn,char *saved_last_component,
332 BOOL *bad_path, SMB_STRUCT_STAT *pst)
339 BOOL component_was_mangled = False;
340 BOOL name_has_wildcard = False;
342 /* Andrew's conservative code... JRA. */
343 extern char magic_char;
346 DEBUG(5, ("unix_convert called on file \"%s\"\n", name));
354 if(saved_last_component)
355 *saved_last_component = 0;
358 * Convert to basic unix format - removing \ chars and cleaning it up.
362 unix_clean_name(name);
365 * Names must be relative to the root of the service - trim any leading /.
366 * also trim trailing /'s.
369 trim_string(name,"/","/");
372 * If we trimmed down to a single '\0' character
373 * then we should use the "." directory to avoid
374 * searching the cache, but not if we are in a
378 if (!*name && (!conn -> printer)) {
384 * Ensure saved_last_component is valid even if file exists.
387 if(saved_last_component) {
388 end = strrchr(name, '/');
390 pstrcpy(saved_last_component, end + 1);
392 pstrcpy(saved_last_component, name);
395 if (!case_sensitive &&
396 (!case_preserve || (is_8_3(name, False) && !short_case_preserve)))
400 * Check if it's a printer file.
403 if ((! *name) || strchr(name,'/') || !is_8_3(name, True)) {
406 slprintf(name2,sizeof(name2)-1,"%.6s.XXXXXX",remote_machine);
412 for (s=name2 ; *s ; s++)
413 if (!issafe(*s)) *s = '_';
414 pstrcpy(name,(char *)mktemp(name2));
420 * If we trimmed down to a single '\0' character
421 * then we will be using the "." directory.
422 * As we know this is valid we can return true here.
429 while (strncmp(start,"./",2) == 0)
432 pstrcpy(orig_path, name);
434 if(stat_cache_lookup( name, dirpath, &start, &st)) {
441 * stat the name - if it exists then we are all done!
444 if (conn->vfs_ops.stat(name,&st) == 0) {
445 stat_cache_add(orig_path, name);
446 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
454 DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
455 name, dirpath, start));
458 * A special case - if we don't have any mangling chars and are case
459 * sensitive then searching won't help.
462 if (case_sensitive && !is_mangled(name) &&
463 !lp_strip_dot() && !use_mangled_map && (saved_errno != ENOENT))
466 if(strchr(start,'?') || strchr(start,'*'))
467 name_has_wildcard = True;
470 * is_mangled() was changed to look at an entire pathname, not
471 * just a component. JRA.
474 if(is_mangled(start))
475 component_was_mangled = True;
478 /* Keep Andrew's conservative code around, just in case. JRA. */
479 /* this is an extremely conservative test for mangled names. */
480 if (strchr(start,magic_char))
481 component_was_mangled = True;
485 * Now we need to recursively match the name against the real
486 * directory structure.
490 * Match each part of the path name separately, trying the names
491 * as is first, then trying to scan the directory for matching names.
494 for (; start ; start = (end?end+1:(char *)NULL)) {
496 * Pinpoint the end of this section of the filename.
498 end = strchr(start, '/');
501 * Chop the name at this point.
506 if(saved_last_component != 0)
507 pstrcpy(saved_last_component, end ? end + 1 : start);
510 * Check if the name exists up to this point.
513 if (conn->vfs_ops.stat(name, &st) == 0) {
515 * It exists. it must either be a directory or this must be
516 * the last part of the path for it to be OK.
518 if (end && !(st.st_mode & S_IFDIR)) {
520 * An intermediate part of the name isn't a directory.
522 DEBUG(5,("Not a dir %s\n",start));
533 * Remember the rest of the pathname so it can be restored
541 * Try to find this part of the path in the directory.
544 if (strchr(start,'?') || strchr(start,'*') ||
545 !scan_directory(dirpath, start, conn, end?True:False)) {
548 * An intermediate part of the name can't be found.
550 DEBUG(5,("Intermediate not found %s\n",start));
554 * We need to return the fact that the intermediate
555 * name resolution failed. This is used to return an
556 * error of ERRbadpath rather than ERRbadfile. Some
557 * Windows applications depend on the difference between
565 * Just the last part of the name doesn't exist.
566 * We may need to strupper() or strlower() it in case
567 * this conversion is being used for file creation
568 * purposes. If the filename is of mixed case then
569 * don't normalise it.
572 if (!case_preserve && (!strhasupper(start) || !strhaslower(start)))
576 * check on the mangled stack to see if we can recover the
577 * base of the filename.
580 if (is_mangled(start)) {
581 check_mangled_cache( start );
584 DEBUG(5,("New file %s\n",start));
589 * Restore the rest of the string.
592 pstrcpy(start+strlen(start)+1,rest);
593 end = start + strlen(start);
598 * Add to the dirpath that we have resolved so far.
601 pstrcat(dirpath,"/");
603 pstrcat(dirpath,start);
606 * Don't cache a name with mangled or wildcard components
607 * as this can change the size.
610 if(!component_was_mangled && !name_has_wildcard)
611 stat_cache_add(orig_path, dirpath);
614 * Restore the / that we wiped out earlier.
621 * Don't cache a name with mangled or wildcard components
622 * as this can change the size.
625 if(!component_was_mangled && !name_has_wildcard)
626 stat_cache_add(orig_path, name);
629 * The name has been resolved.
632 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
637 /****************************************************************************
638 check a filename - possibly caling reducename
640 This is called by every routine before it allows an operation on a filename.
641 It does any final confirmation necessary to ensure that the filename is
642 a valid one for the user to access.
643 ****************************************************************************/
644 BOOL check_name(char *name,connection_struct *conn)
650 if (IS_VETO_PATH(conn, name)) {
651 DEBUG(5,("file path name %s vetoed\n",name));
655 ret = reduce_name(name,conn->connectpath,lp_widelinks(SNUM(conn)));
657 /* Check if we are allowing users to follow symlinks */
658 /* Patch from David Clerc <David.Clerc@cui.unige.ch>
659 University of Geneva */
662 if (!lp_symlinks(SNUM(conn)))
664 SMB_STRUCT_STAT statbuf;
665 if ( (conn->vfs_ops.lstat(dos_to_unix(name,False),&statbuf) != -1) &&
666 (S_ISLNK(statbuf.st_mode)) )
668 DEBUG(3,("check_name: denied: file path name %s is a symlink\n",name));
675 DEBUG(5,("check_name on %s failed\n",name));
681 /****************************************************************************
682 scan a directory to find a filename, matching without case sensitivity
684 If the name looks like a mangled name then try via the mangling functions
685 ****************************************************************************/
686 static BOOL scan_directory(char *path, char *name,connection_struct *conn,BOOL docache)
693 mangled = is_mangled(name);
695 /* handle null paths */
699 if (docache && (dname = DirCacheCheck(path,name,SNUM(conn)))) {
700 pstrcpy(name, dname);
705 * The incoming name can be mangled, and if we de-mangle it
706 * here it will not compare correctly against the filename (name2)
707 * read from the directory and then mangled by the name_map_mangle()
708 * call. We need to mangle both names or neither.
712 mangled = !check_mangled_cache( name );
714 /* open the directory */
715 if (!(cur_dir = OpenDir(conn, path, True)))
717 DEBUG(3,("scan dir didn't open dir [%s]\n",path));
721 /* now scan for matching names */
722 while ((dname = ReadDirName(cur_dir)))
725 (strequal(dname,".") || strequal(dname,"..")))
728 pstrcpy(name2,dname);
729 if (!name_map_mangle(name2,False,SNUM(conn))) continue;
731 if ((mangled && mangled_equal(name,name2))
732 || fname_equal(name, name2))
734 /* we've found the file, change it's name and return */
735 if (docache) DirCacheAdd(path,name,dname,SNUM(conn));
736 pstrcpy(name, dname);