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/*
Unix SMB/CIFS implementation.
Name mapping code
Copyright (C) Jeremy Allison 1998
Copyright (C) Andrew Tridgell 2002
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* ************************************************************************** **
* Used only in do_fwd_mangled_map(), below.
* ************************************************************************** **
*/
static char *map_filename( char *s, /* This is null terminated */
const char *pattern, /* This isn't. */
int len ) /* This is the length of pattern. */
{
static pstring matching_bit; /* The bit of the string which matches */
/* a * in pattern if indeed there is a * */
char *sp; /* Pointer into s. */
char *pp; /* Pointer into p. */
char *match_start; /* Where the matching bit starts. */
pstring pat;
StrnCpy( pat, pattern, len ); /* Get pattern into a proper string! */
pstrcpy( matching_bit, "" ); /* Match but no star gets this. */
pp = pat; /* Initialize the pointers. */
sp = s;
if( strequal(s, ".") || strequal(s, ".."))
{
return NULL; /* Do not map '.' and '..' */
}
if( (len == 1) && (*pattern == '*') )
{
return NULL; /* Impossible, too ambiguous for */
} /* words! */
while( (*sp) /* Not the end of the string. */
&& (*pp) /* Not the end of the pattern. */
&& (*sp == *pp) /* The two match. */
&& (*pp != '*') ) /* No wildcard. */
{
sp++; /* Keep looking. */
pp++;
}
if( !*sp && !*pp ) /* End of pattern. */
return( matching_bit ); /* Simple match. Return empty string. */
if( *pp == '*' )
{
pp++; /* Always interrested in the chacter */
/* after the '*' */
if( !*pp ) /* It is at the end of the pattern. */
{
StrnCpy( matching_bit, s, sp-s );
return( matching_bit );
}
else
{
/* The next character in pattern must match a character further */
/* along s than sp so look for that character. */
match_start = sp;
while( (*sp) /* Not the end of s. */
&& (*sp != *pp) ) /* Not the same */
sp++; /* Keep looking. */
if( !*sp ) /* Got to the end without a match. */
{
return( NULL );
} /* Still hope for a match. */
else
{
/* Now sp should point to a matching character. */
StrnCpy(matching_bit, match_start, sp-match_start);
/* Back to needing a stright match again. */
while( (*sp) /* Not the end of the string. */
&& (*pp) /* Not the end of the pattern. */
&& (*sp == *pp) ) /* The two match. */
{
sp++; /* Keep looking. */
pp++;
}
if( !*sp && !*pp ) /* Both at end so it matched */
return( matching_bit );
else
return( NULL );
}
}
}
return( NULL ); /* No match. */
} /* map_filename */
/* ************************************************************************** **
* MangledMap is a series of name pairs in () separated by spaces.
* If s matches the first of the pair then the name given is the
* second of the pair. A * means any number of any character and if
* present in the second of the pair as well as the first the
* matching part of the first string takes the place of the * in the
* second.
*
* I wanted this so that we could have RCS files which can be used
* by UNIX and DOS programs. My mapping string is (RCS rcs) which
* converts the UNIX RCS file subdirectory to lowercase thus
* preventing mangling.
*
* See 'mangled map' in smb.conf(5).
*
* ************************************************************************** **
*/
static void mangled_map(char *s, const char *MangledMap)
{
const char *start=MangledMap; /* Use this to search for mappings. */
const char *end; /* Used to find the end of strings. */
char *match_string;
pstring new_string; /* Make up the result here. */
char *np; /* Points into new_string. */
DEBUG( 5, ("Mangled Mapping '%s' map '%s'\n", s, MangledMap) );
while( *start ) {
while( (*start) && (*start != '(') )
start++;
if( !*start )
continue; /* Always check for the end. */
start++; /* Skip the ( */
end = start; /* Search for the ' ' or a ')' */
DEBUG( 5, ("Start of first in pair '%s'\n", start) );
while( (*end) && !((*end == ' ') || (*end == ')')) )
end++;
if( !*end ) {
start = end;
continue; /* Always check for the end. */
}
DEBUG( 5, ("End of first in pair '%s'\n", end) );
if( (match_string = map_filename( s, start, end-start )) ) {
int size_left = sizeof(new_string) - 1;
DEBUG( 5, ("Found a match\n") );
/* Found a match. */
start = end + 1; /* Point to start of what it is to become. */
DEBUG( 5, ("Start of second in pair '%s'\n", start) );
end = start;
np = new_string;
while( (*end && size_left > 0) /* Not the end of string. */
&& (*end != ')') /* Not the end of the pattern. */
&& (*end != '*') ) { /* Not a wildcard. */
*np++ = *end++;
size_left--;
}
if( !*end ) {
start = end;
continue; /* Always check for the end. */
}
if( *end == '*' ) {
if (size_left > 0 )
safe_strcpy( np, match_string, size_left );
np += strlen( match_string );
size_left -= strlen( match_string );
end++; /* Skip the '*' */
while ((*end && size_left > 0) /* Not the end of string. */
&& (*end != ')') /* Not the end of the pattern. */
&& (*end != '*')) { /* Not a wildcard. */
*np++ = *end++;
size_left--;
}
}
if (!*end) {
start = end;
continue; /* Always check for the end. */
}
if (size_left > 0)
*np++ = '\0'; /* NULL terminate it. */
DEBUG(5,("End of second in pair '%s'\n", end));
new_string[sizeof(new_string)-1] = '\0';
pstrcpy( s, new_string ); /* Substitute with the new name. */
DEBUG( 5, ("s is now '%s'\n", s) );
}
start = end; /* Skip a bit which cannot be wanted anymore. */
start++;
}
}
/*
front end routine to the mangled map code
personally I think that the whole idea of "mangled map" is completely bogus
*/
void mangle_map_filename(fstring fname, int snum)
{
char *map;
map = lp_mangled_map(snum);
if (!map || !*map) return;
mangled_map(fname, map);
}
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