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)
335 char *start, *end, *orig_start;
339 BOOL component_was_mangled = False;
340 BOOL name_has_wildcard = False;
342 /* Andrew's conservative code... JRA. */
343 extern char magic_char;
352 if(saved_last_component)
353 *saved_last_component = 0;
356 * Convert to basic unix format - removing \ chars and cleaning it up.
360 unix_clean_name(name);
363 * Names must be relative to the root of the service - trim any leading /.
364 * also trim trailing /'s.
367 trim_string(name,"/","/");
370 * If we trimmed down to a single '\0' character
371 * then we should use the "." directory to avoid
372 * searching the cache.
381 * Ensure saved_last_component is valid even if file exists.
384 if(saved_last_component) {
385 end = strrchr(name, '/');
387 pstrcpy(saved_last_component, end + 1);
389 pstrcpy(saved_last_component, name);
392 if (!case_sensitive &&
393 (!case_preserve || (is_8_3(name, False) && !short_case_preserve)))
397 * Check if it's a printer file.
400 if ((! *name) || strchr(name,'/') || !is_8_3(name, True)) {
403 slprintf(name2,sizeof(name2)-1,"%.6s.XXXXXX",remote_machine);
409 for (s=name2 ; *s ; s++)
410 if (!issafe(*s)) *s = '_';
411 pstrcpy(name,(char *)mktemp(name2));
417 while (strncmp(start,"./",2) == 0)
420 pstrcpy(orig_path, name);
422 if(stat_cache_lookup( name, dirpath, &start, &st)) {
429 * stat the name - if it exists then we are all done!
432 if (dos_stat(name,&st) == 0) {
433 stat_cache_add(orig_path, name);
434 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
442 DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
443 name, dirpath, start));
446 * A special case - if we don't have any mangling chars and are case
447 * sensitive then searching won't help.
450 if (case_sensitive && !is_mangled(name) &&
451 !lp_strip_dot() && !use_mangled_map && (saved_errno != ENOENT))
454 if(strchr(start,'?') || strchr(start,'*'))
455 name_has_wildcard = True;
458 * is_mangled() was changed to look at an entire pathname, not
459 * just a component. JRA.
462 if(is_mangled(start))
463 component_was_mangled = True;
466 /* Keep Andrew's conservative code around, just in case. JRA. */
467 /* this is an extremely conservative test for mangled names. */
468 if (strchr(start,magic_char))
469 component_was_mangled = True;
473 * Now we need to recursively match the name against the real
474 * directory structure.
478 * Match each part of the path name separately, trying the names
479 * as is first, then trying to scan the directory for matching names.
482 for (orig_start = start; start ; start = (end?end+1:(char *)NULL)) {
484 * Pinpoint the end of this section of the filename.
486 end = strchr(start, '/');
489 * Chop the name at this point.
494 if(saved_last_component != 0)
495 pstrcpy(saved_last_component, end ? end + 1 : start);
498 * Check if the name exists up to this point.
500 if (dos_stat(name, &st) == 0) {
502 * It exists. it must either be a directory or this must be
503 * the last part of the path for it to be OK.
505 if (end && !(st.st_mode & S_IFDIR)) {
507 * An intermediate part of the name isn't a directory.
509 DEBUG(5,("Not a dir %s\n",start));
520 * Remember the rest of the pathname so it can be restored
528 * Try to find this part of the path in the directory.
531 if (strchr(start,'?') || strchr(start,'*') ||
532 !scan_directory(dirpath, start, conn, end?True:False)) {
535 * An intermediate part of the name can't be found.
537 DEBUG(5,("Intermediate not found %s\n",start));
541 * We need to return the fact that the intermediate
542 * name resolution failed. This is used to return an
543 * error of ERRbadpath rather than ERRbadfile. Some
544 * Windows applications depend on the difference between
552 * Just the last part of the name doesn't exist.
553 * We may need to strupper() or strlower() it in case
554 * this conversion is being used for file creation
555 * purposes. If the filename is of mixed case then
556 * don't normalise it.
559 if (!case_preserve && (!strhasupper(start) || !strhaslower(start)))
563 * check on the mangled stack to see if we can recover the
564 * base of the filename.
567 if (is_mangled(start)) {
568 check_mangled_cache( start );
571 DEBUG(5,("New file %s\n",start));
576 * Restore the rest of the string.
579 pstrcpy(start+strlen(start)+1,rest);
580 end = start + strlen(start);
585 * Add to the dirpath that we have resolved so far.
588 pstrcat(dirpath,"/");
590 pstrcat(dirpath,start);
593 * Don't cache a name with mangled or wildcard components
594 * as this can change the size.
597 if(!component_was_mangled && !name_has_wildcard)
598 stat_cache_add(orig_path, dirpath);
601 * Restore the / that we wiped out earlier.
608 * Don't cache a name with mangled or wildcard components
609 * as this can change the size.
612 if(!component_was_mangled && !name_has_wildcard)
613 stat_cache_add(orig_path, name);
616 * The name has been resolved.
619 DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
624 /****************************************************************************
625 check a filename - possibly caling reducename
627 This is called by every routine before it allows an operation on a filename.
628 It does any final confirmation necessary to ensure that the filename is
629 a valid one for the user to access.
630 ****************************************************************************/
631 BOOL check_name(char *name,connection_struct *conn)
637 if (IS_VETO_PATH(conn, name)) {
638 DEBUG(5,("file path name %s vetoed\n",name));
642 ret = reduce_name(name,conn->connectpath,lp_widelinks(SNUM(conn)));
644 /* Check if we are allowing users to follow symlinks */
645 /* Patch from David Clerc <David.Clerc@cui.unige.ch>
646 University of Geneva */
649 if (!lp_symlinks(SNUM(conn)))
651 SMB_STRUCT_STAT statbuf;
652 if ( (dos_lstat(name,&statbuf) != -1) &&
653 (S_ISLNK(statbuf.st_mode)) )
655 DEBUG(3,("check_name: denied: file path name %s is a symlink\n",name));
662 DEBUG(5,("check_name on %s failed\n",name));
668 /****************************************************************************
669 scan a directory to find a filename, matching without case sensitivity
671 If the name looks like a mangled name then try via the mangling functions
672 ****************************************************************************/
673 static BOOL scan_directory(char *path, char *name,connection_struct *conn,BOOL docache)
680 mangled = is_mangled(name);
682 /* handle null paths */
686 if (docache && (dname = DirCacheCheck(path,name,SNUM(conn)))) {
687 pstrcpy(name, dname);
692 * The incoming name can be mangled, and if we de-mangle it
693 * here it will not compare correctly against the filename (name2)
694 * read from the directory and then mangled by the name_map_mangle()
695 * call. We need to mangle both names or neither.
699 mangled = !check_mangled_cache( name );
701 /* open the directory */
702 if (!(cur_dir = OpenDir(conn, path, True)))
704 DEBUG(3,("scan dir didn't open dir [%s]\n",path));
708 /* now scan for matching names */
709 while ((dname = ReadDirName(cur_dir)))
712 (strequal(dname,".") || strequal(dname,"..")))
715 pstrcpy(name2,dname);
716 if (!name_map_mangle(name2,False,SNUM(conn))) continue;
718 if ((mangled && mangled_equal(name,name2))
719 || fname_equal(name, name2))
721 /* we've found the file, change it's name and return */
722 if (docache) DirCacheAdd(path,name,dname,SNUM(conn));
723 pstrcpy(name, dname);