2 Unix SMB/Netbios implementation.
5 Copyright (C) Andrew Tridgell 1992-1995
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.
25 extern int DEBUGLEVEL;
26 extern int case_default;
27 extern BOOL case_mangle;
29 /****************************************************************************
30 provide a checksum on a string
31 ****************************************************************************/
32 int str_checksum(char *s)
40 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
46 /****************************************************************************
47 return True if a name is a special msdos reserved name
48 ****************************************************************************/
49 static BOOL is_reserved_msdos(char *fname)
54 StrnCpy (upperFname, fname, 12);
56 /* lpt1.txt and con.txt etc are also illegal */
57 p=strchr(upperFname,'.');
60 strupper (upperFname);
61 if ((strcmp(upperFname,"CLOCK$") == 0) ||
62 (strcmp(upperFname,"CON") == 0) ||
63 (strcmp(upperFname,"AUX") == 0) ||
64 (strcmp(upperFname,"COM1") == 0) ||
65 (strcmp(upperFname,"COM2") == 0) ||
66 (strcmp(upperFname,"COM3") == 0) ||
67 (strcmp(upperFname,"COM4") == 0) ||
68 (strcmp(upperFname,"LPT1") == 0) ||
69 (strcmp(upperFname,"LPT2") == 0) ||
70 (strcmp(upperFname,"LPT3") == 0) ||
71 (strcmp(upperFname,"NUL") == 0) ||
72 (strcmp(upperFname,"PRN") == 0))
80 /****************************************************************************
81 return True if a name is in 8.3 dos format
82 ****************************************************************************/
83 BOOL is_8_3(char *fname)
87 char *slash_pos = strrchr(fname,'/');
90 if (slash_pos) fname = slash_pos+1;
93 dot_pos = strchr(fname,'.');
95 DEBUG(5,("checking %s for 8.3\n",fname));
101 if (strhasupper(fname)) return(False);
104 if (strhaslower(fname)) return(False);
108 /* can't be longer than 12 chars */
109 if (len == 0 || len > 12)
112 /* can't be an MS-DOS Special file such as lpt1 or even lpt1.txt */
113 if (is_reserved_msdos(fname))
116 /* can't contain invalid dos chars */
117 /* Windows use the ANSI charset.
118 But filenames are translated in the PC charset.
119 This Translation may be more or less relaxed depending
120 the Windows application. */
122 /* %%% A nice improvment to name mangling would be to translate
123 filename to ANSI charset on the smb server host */
131 if (is_shift_jis (*p)) {
133 } else if (is_kana (*p)) {
136 if (*p == '.' && !dot_pos)
137 dot_pos = (char *) p;
153 /* no dot and less than 9 means OK */
157 l = PTR_DIFF(dot_pos,fname);
159 /* base must be at least 1 char except special cases . and .. */
161 return(strcmp(fname,".") == 0 || strcmp(fname,"..") == 0);
163 /* base can't be greater than 8 */
167 if (lp_strip_dot() &&
169 !strchr(dot_pos+1,'.'))
175 /* extension must be between 1 and 3 */
176 if ( (len - l < 2 ) || (len - l > 4) )
179 /* extension can't have a dot */
180 if (strchr(dot_pos+1,'.'))
183 /* must be in 8.3 format */
190 keep a stack of name mangling results - just
191 so file moves and copies have a chance of working
193 fstring *mangled_stack = NULL;
194 int mangled_stack_size = 0;
195 int mangled_stack_len = 0;
197 /****************************************************************************
198 create the mangled stack
199 ****************************************************************************/
200 void create_mangled_stack(int size)
205 mangled_stack_size = 0;
206 mangled_stack_len = 0;
209 mangled_stack = (fstring *)malloc(sizeof(fstring)*size);
210 if (mangled_stack) mangled_stack_size = size;
213 /****************************************************************************
214 push a mangled name onto the stack
215 ****************************************************************************/
216 static void push_mangled_name(char *s)
224 for (i=0;i<mangled_stack_len;i++)
225 if (strcmp(s,mangled_stack[i]) == 0)
227 array_promote(mangled_stack[0],sizeof(fstring),i);
231 memmove(mangled_stack[1],mangled_stack[0],
232 sizeof(fstring)*MIN(mangled_stack_len,mangled_stack_size-1));
233 strcpy(mangled_stack[0],s);
234 p = strrchr(mangled_stack[0],'.');
235 if (p && (!strhasupper(p+1)) && (strlen(p+1) < 4))
237 mangled_stack_len = MIN(mangled_stack_size,mangled_stack_len+1);
240 /****************************************************************************
241 check for a name on the mangled name stack
242 ****************************************************************************/
243 BOOL check_mangled_stack(char *s)
248 char *p = strrchr(s,'.');
249 BOOL check_extension = False;
253 if (!mangled_stack) return(False);
257 check_extension = True;
258 StrnCpy(extension,p,4);
259 strlower(extension); /* XXXXXXX */
262 for (i=0;i<mangled_stack_len;i++)
264 strcpy(tmpname,mangled_stack[i]);
265 mangle_name_83(tmpname);
266 if (strequal(tmpname,s))
268 strcpy(s,mangled_stack[i]);
271 if (check_extension && !strchr(mangled_stack[i],'.'))
273 strcpy(tmpname,mangled_stack[i]);
274 strcat(tmpname,extension);
275 mangle_name_83(tmpname);
276 if (strequal(tmpname,s))
278 strcpy(s,mangled_stack[i]);
285 if (i < mangled_stack_len)
287 DEBUG(3,("Found %s on mangled stack as %s\n",s,mangled_stack[i]));
288 array_promote(mangled_stack[0],sizeof(fstring),i);
295 static char *map_filename(char *s, /* This is null terminated */
296 char *pattern, /* This isn't. */
297 int len) /* This is the length of pattern. */
299 static pstring matching_bit; /* The bit of the string which matches */
300 /* a * in pattern if indeed there is a * */
301 char *sp; /* Pointer into s. */
302 char *pp; /* Pointer into p. */
303 char *match_start; /* Where the matching bit starts. */
306 StrnCpy(pat, pattern, len); /* Get pattern into a proper string! */
307 strcpy(matching_bit,""); /* Match but no star gets this. */
308 pp = pat; /* Initialise the pointers. */
310 if ((len == 1) && (*pattern == '*')) {
311 return NULL; /* Impossible, too ambiguous for */
315 while ((*sp) /* Not the end of the string. */
316 && (*pp) /* Not the end of the pattern. */
317 && (*sp == *pp) /* The two match. */
318 && (*pp != '*')) { /* No wildcard. */
319 sp++; /* Keep looking. */
322 if (!*sp && !*pp) /* End of pattern. */
323 return matching_bit; /* Simple match. Return empty string. */
325 pp++; /* Always interrested in the chacter */
327 if (!*pp) { /* It is at the end of the pattern. */
328 StrnCpy(matching_bit, s, sp-s);
331 /* The next character in pattern must match a character further */
332 /* along s than sp so look for that character. */
334 while ((*sp) /* Not the end of s. */
335 && (*sp != *pp)) /* Not the same */
336 sp++; /* Keep looking. */
337 if (!*sp) { /* Got to the end without a match. */
339 } else { /* Still hope for a match. */
340 /* Now sp should point to a matching character. */
341 StrnCpy(matching_bit, match_start, sp-match_start);
342 /* Back to needing a stright match again. */
343 while ((*sp) /* Not the end of the string. */
344 && (*pp) /* Not the end of the pattern. */
345 && (*sp == *pp)) { /* The two match. */
346 sp++; /* Keep looking. */
349 if (!*sp && !*pp) /* Both at end so it matched */
356 return NULL; /* No match. */
360 /* this is the magic char used for mangling */
361 char magic_char = '~';
364 /****************************************************************************
365 determine whther is name could be a mangled name
366 ****************************************************************************/
367 BOOL is_mangled(char *s)
369 char *m = strchr(s,magic_char);
370 if (!m) return(False);
372 /* we use two base 36 chars efore the extension */
373 if (m[1] == '.' || m[1] == 0 ||
374 m[2] == '.' || m[2] == 0 ||
375 (m[3] != '.' && m[3] != 0))
376 return(is_mangled(m+1));
384 /****************************************************************************
385 return a base 36 character. v must be from 0 to 35.
386 ****************************************************************************/
387 static char base36(int v)
392 else /* needed to work around a DEC C compiler bug */
393 return('A' + (v-10));
397 static void do_fwd_mangled_map(char *s, char *MangledMap)
399 /* MangledMap is a series of name pairs in () separated by spaces.
400 * If s matches the first of the pair then the name given is the
401 * second of the pair. A * means any number of any character and if
402 * present in the second of the pair as well as the first the
403 * matching part of the first string takes the place of the * in the
406 * I wanted this so that we could have RCS files which can be used
407 * by UNIX and DOS programs. My mapping string is (RCS rcs) which
408 * converts the UNIX RCS file subdirectory to lowercase thus
409 * preventing mangling.
411 char *start=MangledMap; /* Use this to search for mappings. */
412 char *end; /* Used to find the end of strings. */
414 pstring new_string; /* Make up the result here. */
415 char *np; /* Points into new_string. */
417 DEBUG(5,("Mangled Mapping '%s' map '%s'\n", s, MangledMap));
419 while ((*start) && (*start != '('))
421 start++; /* Skip the ( */
423 continue; /* Always check for the end. */
424 end = start; /* Search for the ' ' or a ')' */
425 DEBUG(5,("Start of first in pair '%s'\n", start));
426 while ((*end) && !((*end == ' ') || (*end == ')')))
430 continue; /* Always check for the end. */
432 DEBUG(5,("End of first in pair '%s'\n", end));
433 if ((match_string = map_filename(s, start, end-start))) {
434 DEBUG(5,("Found a match\n"));
436 start = end+1; /* Point to start of what it is to become. */
437 DEBUG(5,("Start of second in pair '%s'\n", start));
440 while ((*end) /* Not the end of string. */
441 && (*end != ')') /* Not the end of the pattern. */
442 && (*end != '*')) /* Not a wildcard. */
446 continue; /* Always check for the end. */
449 strcpy(np, match_string);
450 np += strlen(match_string);
451 end++; /* Skip the '*' */
452 while ((*end) /* Not the end of string. */
453 && (*end != ')') /* Not the end of the pattern. */
454 && (*end != '*')) /* Not a wildcard. */
459 continue; /* Always check for the end. */
461 *np++ = '\0'; /* NULL terminate it. */
462 DEBUG(5,("End of second in pair '%s'\n", end));
463 strcpy(s, new_string); /* Substitute with the new name. */
464 DEBUG(5,("s is now '%s'\n", s));
466 start = end; /* Skip a bit which cannot be wanted */
472 /****************************************************************************
473 do the actual mangling to 8.3 format
474 ****************************************************************************/
475 void mangle_name_83(char *s)
477 int csum = str_checksum(s);
488 if (p && (strlen(p+1)<4) )
490 BOOL all_normal = (strisnormal(p+1)); /* XXXXXXXXX */
491 if (all_normal && p[1] != 0)
494 csum = str_checksum(s);
502 DEBUG(5,("Mangling name %s to ",s));
507 strcpy(extension,"___");
511 while (*p && extlen < 3)
513 if (isdoschar(*p) && *p != '.')
514 extension[extlen++] = *p;
517 extension[extlen] = 0;
523 while (*p && baselen < 5)
525 if (isdoschar(*p) && *p != '.')
526 base[baselen++] = *p;
531 csum = csum % (36*36);
533 sprintf(s,"%s%c%c%c",base,magic_char,base36(csum/36),base36(csum%36));
545 /*******************************************************************
546 work out if a name is illegal, even for long names
547 ******************************************************************/
548 static BOOL illegal_name(char *name)
550 static unsigned char illegal[256];
551 static BOOL initialised=False;
555 char *ill = "*\\/?<>|\":{}";
558 bzero((char *)illegal,256);
559 for (s = (unsigned char *)ill; *s; s++)
564 for (s = (unsigned char *)name; *s;) {
565 if (is_shift_jis (*s)) {
567 } else if (illegal[*s]) {
574 for (s = (unsigned char *)name;*s;s++)
575 if (illegal[*s]) return(True);
583 /****************************************************************************
584 convert a filename to DOS format. return True if successful.
585 ****************************************************************************/
586 BOOL name_map_mangle(char *OutName,BOOL need83,int snum)
588 #ifdef MANGLE_LONG_FILENAMES
589 if (!need83 && illegal_name(OutName)) need83 = True;
592 /* apply any name mappings */
594 char *map = lp_mangled_map(snum);
596 do_fwd_mangled_map(OutName,map);
599 /* check if it's already in 8.3 format */
600 if (need83 && !is_8_3(OutName)) {
601 if (!lp_manglednames(snum)) return(False);
603 /* mangle it into 8.3 */
604 push_mangled_name(OutName);
605 mangle_name_83(OutName);