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Diffstat (limited to 'source3/smbd/mangle_map.c')
| -rw-r--r-- | source3/smbd/mangle_map.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/source3/smbd/mangle_map.c b/source3/smbd/mangle_map.c new file mode 100644 index 00000000000..71d93407181 --- /dev/null +++ b/source3/smbd/mangle_map.c @@ -0,0 +1,203 @@ +/* + 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) +{ + char *start=MangledMap; /* Use this to search for mappings. */ + 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 )) ) { + 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) /* Not the end of string. */ + && (*end != ')') /* Not the end of the pattern. */ + && (*end != '*') ) /* Not a wildcard. */ + *np++ = *end++; + + if( !*end ) { + start = end; + continue; /* Always check for the end. */ + } + if( *end == '*' ) { + pstrcpy( np, match_string ); + np += strlen( match_string ); + end++; /* Skip the '*' */ + while ((*end) /* Not the end of string. */ + && (*end != ')') /* Not the end of the pattern. */ + && (*end != '*'))/* Not a wildcard. */ + *np++ = *end++; + } + if (!*end) { + start = end; + continue; /* Always check for the end. */ + } + *np++ = '\0'; /* NULL terminate it. */ + DEBUG(5,("End of second in pair '%s'\n", end)); + 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(char *fname, int snum) +{ + char *map; + + map = lp_mangled_map(snum); + if (!map || !*map) return; + + mangled_map(fname, map); +} |