475 lines
12 KiB
C
475 lines
12 KiB
C
/*****************************************************************************
|
|
*
|
|
* $Id$
|
|
* Purpose ...............: Mangle a unix name to DOS 8.3 filename
|
|
*
|
|
*****************************************************************************
|
|
* Copyright (C) 1997-2004
|
|
*
|
|
* Michiel Broek FIDO: 2:280/2802
|
|
* Beekmansbos 10
|
|
* 1971 BV IJmuiden
|
|
* the Netherlands
|
|
*
|
|
* This file is part of MBSE BBS.
|
|
*
|
|
* This BBS 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, or (at your option) any
|
|
* later version.
|
|
*
|
|
* MBSE BBS 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 MBSE BBS; see the file COPYING. If not, write to the Free
|
|
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
*****************************************************************************
|
|
* Ideas taken from Samba, Copyright (C) Andrew Tridgell 1992-1998
|
|
*****************************************************************************/
|
|
|
|
#include "../config.h"
|
|
#include "libs.h"
|
|
#include "structs.h"
|
|
#include "clcomm.h"
|
|
#include "common.h"
|
|
|
|
|
|
/*
|
|
* Prototype functions
|
|
*/
|
|
int strhaslower(const char *);
|
|
char *safe_strcpy(char *, const char *, size_t);
|
|
static void init_chartest(void);
|
|
static int is_reserved_msdos(char *);
|
|
int is_8_3(char *);
|
|
|
|
|
|
#define PTR_DIFF(p1,p2) ((int)(((const char *)(p1)) - (const char *)(p2)))
|
|
|
|
/* -------------------------------------------------------------------------- **
|
|
* Other stuff...
|
|
*
|
|
* magic_char - This is the magic char used for mangling. It's global.
|
|
*
|
|
* MANGLE_BASE - This is the number of characters we use for name mangling.
|
|
*
|
|
* basechars - The set characters used for name mangling. This
|
|
* is static (scope is this file only).
|
|
*
|
|
* mangle() - Macro used to select a character from basechars (i.e.,
|
|
* mangle(n) will return the nth digit, modulo MANGLE_BASE).
|
|
*
|
|
* chartest - array 0..255. The index range is the set of all possible
|
|
* values of a byte. For each byte value, the content is a
|
|
* two nibble pair. See BASECHAR_MASK and ILLEGAL_MASK,
|
|
* below.
|
|
*
|
|
* ct_initialized - False until the chartest array has been initialized via
|
|
* a call to init_chartest().
|
|
*
|
|
* BASECHAR_MASK - Masks the upper nibble of a one-byte value.
|
|
*
|
|
* ILLEGAL_MASK - Masks the lower nibble of a one-byte value.
|
|
*
|
|
* isillegal() - Given a character, check the chartest array to see
|
|
* if that character is in the illegal characters set.
|
|
* This is faster than using strchr().
|
|
*
|
|
*/
|
|
|
|
char magic_char = '~';
|
|
|
|
static char basechars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_-!@#$%";
|
|
#define MANGLE_BASE (sizeof(basechars)/sizeof(char)-1)
|
|
|
|
static unsigned char chartest[256] = { 0 };
|
|
static int ct_initialized = FALSE;
|
|
|
|
#define mangle(V) ((char)(basechars[(V) % MANGLE_BASE]))
|
|
#define BASECHAR_MASK 0xf0
|
|
#define ILLEGAL_MASK 0x0f
|
|
#define isillegal(C) ( (chartest[ ((C) & 0xff) ]) & ILLEGAL_MASK )
|
|
|
|
|
|
/****************************************************************************
|
|
does a string have any lowercase chars in it?
|
|
****************************************************************************/
|
|
int strhaslower(const char *s)
|
|
{
|
|
while (*s) {
|
|
if (islower(*s))
|
|
return TRUE;
|
|
s++;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*******************************************************************
|
|
safe string copy into a known length string. maxlength does not
|
|
include the terminating zero.
|
|
********************************************************************/
|
|
|
|
char *safe_strcpy(char *dest,const char *src, size_t maxlength)
|
|
{
|
|
size_t len;
|
|
|
|
if (!dest) {
|
|
Syslog('+', "ERROR: NULL dest in safe_strcpy");
|
|
return NULL;
|
|
}
|
|
|
|
if (!src) {
|
|
*dest = 0;
|
|
return dest;
|
|
}
|
|
|
|
len = strlen(src);
|
|
|
|
if (len > maxlength) {
|
|
WriteError("ERROR: string overflow by %d in safe_strcpy [%.50s]", (int)(len-maxlength), src);
|
|
len = maxlength;
|
|
}
|
|
|
|
memcpy(dest, src, len);
|
|
dest[len] = 0;
|
|
return dest;
|
|
}
|
|
|
|
|
|
|
|
/* ************************************************************************** **
|
|
* Initialize the static character test array.
|
|
*
|
|
* Input: none
|
|
*
|
|
* Output: none
|
|
*
|
|
* Notes: This function changes (loads) the contents of the <chartest>
|
|
* array. The scope of <chartest> is this file.
|
|
*
|
|
* ************************************************************************** **
|
|
*/
|
|
static void init_chartest( void )
|
|
{
|
|
char *illegalchars = (char *)"*\\/?<>|\":";
|
|
unsigned char *s;
|
|
|
|
memset( (char *)chartest, '\0', 256 );
|
|
|
|
for( s = (unsigned char *)illegalchars; *s; s++ )
|
|
chartest[*s] = ILLEGAL_MASK;
|
|
|
|
for( s = (unsigned char *)basechars; *s; s++ )
|
|
chartest[*s] |= BASECHAR_MASK;
|
|
|
|
ct_initialized = TRUE;
|
|
} /* init_chartest */
|
|
|
|
|
|
/* ************************************************************************** **
|
|
* Return True if a name is a special msdos reserved name.
|
|
*
|
|
* Input: fname - String containing the name to be tested.
|
|
*
|
|
* Output: True, if the name matches one of the list of reserved names.
|
|
*
|
|
* Notes: This is a static function called by is_8_3(), below.
|
|
*
|
|
* ************************************************************************** **
|
|
*/
|
|
static int is_reserved_msdos( char *fname )
|
|
{
|
|
char upperFname[13];
|
|
char *p;
|
|
|
|
strncpy (upperFname, fname, 12);
|
|
|
|
/* lpt1.txt and con.txt etc are also illegal */
|
|
p = strchr(upperFname,'.');
|
|
if (p)
|
|
*p = '\0';
|
|
|
|
tu(upperFname);
|
|
p = upperFname + 1;
|
|
switch (upperFname[0]) {
|
|
case 'A':
|
|
if( 0 == strcmp( p, "UX" ) )
|
|
return TRUE;
|
|
break;
|
|
case 'C':
|
|
if ((0 == strcmp( p, "LOCK$" )) || (0 == strcmp( p, "ON" )) || (0 == strcmp( p, "OM1" ))
|
|
|| (0 == strcmp( p, "OM2" )) || (0 == strcmp( p, "OM3" )) || (0 == strcmp( p, "OM4" )))
|
|
return TRUE;
|
|
break;
|
|
case 'L':
|
|
if( (0 == strcmp( p, "PT1" )) || (0 == strcmp( p, "PT2" )) || (0 == strcmp( p, "PT3" )))
|
|
return TRUE;
|
|
break;
|
|
case 'N':
|
|
if( 0 == strcmp( p, "UL" ) )
|
|
return TRUE;
|
|
break;
|
|
case 'P':
|
|
if( 0 == strcmp( p, "RN" ) )
|
|
return TRUE;
|
|
break;
|
|
}
|
|
|
|
return FALSE;
|
|
} /* is_reserved_msdos */
|
|
|
|
|
|
|
|
|
|
/* ************************************************************************** **
|
|
* Return True if the name is a valid DOS name in 8.3 DOS format.
|
|
*
|
|
* Input: fname - File name to be checked.
|
|
* check_case - If True, then the
|
|
* name will be checked to see if all characters
|
|
* are the correct case.
|
|
*
|
|
* Output: True if the name is a valid DOS name, else FALSE.
|
|
*
|
|
* ************************************************************************** **
|
|
*/
|
|
int is_8_3( char *fname)
|
|
{
|
|
int len;
|
|
int l, i;
|
|
char *p;
|
|
char *dot_pos;
|
|
char *slash_pos = strrchr( fname, '/' );
|
|
|
|
/* If there is a directory path, skip it. */
|
|
if (slash_pos)
|
|
fname = slash_pos + 1;
|
|
len = strlen(fname);
|
|
|
|
/* Can't be 0 chars or longer than 12 chars */
|
|
if ((len == 0) || (len > 12))
|
|
return FALSE;
|
|
|
|
/* Mustn't be an MS-DOS Special file such as lpt1 or even lpt1.txt */
|
|
if (is_reserved_msdos(fname))
|
|
return FALSE;
|
|
|
|
init_chartest();
|
|
for (i = 0; i < strlen(fname); i++) {
|
|
if (isillegal(fname[i])) {
|
|
Syslog('+', "Illegal character in filename");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Can't contain invalid dos chars */
|
|
p = fname;
|
|
dot_pos = NULL;
|
|
while (*p) {
|
|
if (*p == '.' && !dot_pos)
|
|
dot_pos = (char *)p;
|
|
p++;
|
|
}
|
|
|
|
/* no dot and less than 9 means OK */
|
|
if (!dot_pos)
|
|
return (len <= 8);
|
|
|
|
l = PTR_DIFF(dot_pos, fname);
|
|
|
|
/* base must be at least 1 char except special cases . and .. */
|
|
if (l == 0)
|
|
return(0 == strcmp( fname, "." ) || 0 == strcmp( fname, ".." ));
|
|
|
|
/* base can't be greater than 8 */
|
|
if (l > 8)
|
|
return FALSE;
|
|
|
|
if (len - l == 1 && !strchr( dot_pos + 1, '.' )) {
|
|
*dot_pos = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
/* extension must be between 1 and 3 */
|
|
if ((len - l < 2 ) || (len - l > 4))
|
|
return FALSE;
|
|
|
|
/* extensions may not have a dot */
|
|
if (strchr( dot_pos+1, '.' ))
|
|
return FALSE;
|
|
|
|
/* must be in 8.3 format */
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* do the actual mangling to 8.3 format
|
|
* the buffer must be able to hold 13 characters (including the null)
|
|
*****************************************************************************
|
|
*/
|
|
void mangle_name_83(char *s)
|
|
{
|
|
int crc16, i;
|
|
char *p, *q;
|
|
char extension[4];
|
|
char base[9];
|
|
int baselen = 0;
|
|
int extlen = 0;
|
|
|
|
extension[0] = 0;
|
|
base[0] = 0;
|
|
|
|
/*
|
|
* First, convert some common Unix extensions to extensions of 3
|
|
* characters. If none fits, don't change anything now.
|
|
* FIXME: should be in an external file.
|
|
*/
|
|
if (strcmp(q = s + strlen(s) - strlen(".tar.gz"), ".tar.gz") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"tgz";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".tar.z"), ".tar.z") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"tgz";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".tar.Z"), ".tar.Z") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"taz";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".html"), ".html") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"htm";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".shtml"), ".shtml") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"stm";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".conf"), ".conf") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"cnf";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".mpeg"), ".mpeg") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"mpg";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".smil"), ".smil") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"smi";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".perl"), ".perl") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"pl";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".jpeg"), ".jpeg") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"jpg";
|
|
} else if (strcmp(q = s + strlen(s) - strlen(".tiff"), ".tiff") == 0) {
|
|
*q = '\0';
|
|
q = (char *)"tif";
|
|
} else {
|
|
q = NULL;
|
|
}
|
|
|
|
if (q) {
|
|
/*
|
|
* Extension is modified, apply changes
|
|
*/
|
|
p = s + strlen(s);
|
|
*p++ = '.';
|
|
for (i = 0; i < strlen(q); i++)
|
|
*p++ = q[i];
|
|
*p++ = '\0';
|
|
}
|
|
|
|
/*
|
|
* Now start name mangling
|
|
*/
|
|
p = strrchr(s,'.');
|
|
if (p && (strlen(p+1) < (size_t)4)) {
|
|
int all_normal = (!strhaslower(p+1)); /* XXXXXXXXX */
|
|
|
|
if (all_normal && p[1] != 0) {
|
|
*p = 0;
|
|
crc16 = crc16xmodem(s, strlen(s));
|
|
*p = '.';
|
|
} else {
|
|
crc16 = crc16xmodem(s, strlen(s));
|
|
}
|
|
} else {
|
|
crc16 = crc16xmodem(s, strlen(s));
|
|
}
|
|
|
|
tu(s);
|
|
|
|
if (p) {
|
|
if (p == s)
|
|
safe_strcpy(extension, "___", 3);
|
|
else {
|
|
*p++ = 0;
|
|
while (*p && extlen < 3) {
|
|
if (*p != '.' )
|
|
extension[extlen++] = p[0];
|
|
p++;
|
|
}
|
|
extension[extlen] = 0;
|
|
}
|
|
}
|
|
|
|
p = s;
|
|
|
|
/*
|
|
* Changed to baselen 4, original this is 5.
|
|
* 24-11-2002 MB.
|
|
*/
|
|
while (*p && baselen < 4) {
|
|
if (*p != '.' )
|
|
base[baselen++] = p[0];
|
|
p++;
|
|
}
|
|
base[baselen] = 0;
|
|
|
|
if (crc16 > (MANGLE_BASE * MANGLE_BASE * MANGLE_BASE))
|
|
Syslog('!', "WARNING: mangle_name_83() crc16 overflow");
|
|
crc16 = crc16 % (MANGLE_BASE * MANGLE_BASE * MANGLE_BASE);
|
|
sprintf(s, "%s%c%c%c%c", base, magic_char,
|
|
mangle(crc16 / (MANGLE_BASE * MANGLE_BASE)), mangle(crc16 / MANGLE_BASE), mangle(crc16));
|
|
if ( *extension ) {
|
|
(void)strcat(s, ".");
|
|
(void)strcat(s, extension);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* Convert a filename to DOS format.
|
|
*
|
|
* Input: OutName - Source *and* destination buffer.
|
|
*
|
|
* NOTE that OutName must point to a memory space that
|
|
* is at least 13 bytes in size! That should always be
|
|
* the case of course.
|
|
*
|
|
* ****************************************************************************
|
|
*/
|
|
void name_mangle(char *OutName)
|
|
{
|
|
char *p;
|
|
|
|
p = xstrcpy(OutName);
|
|
/*
|
|
* check if it's already in 8.3 format
|
|
*/
|
|
if (!is_8_3(OutName)) {
|
|
mangle_name_83(OutName);
|
|
} else {
|
|
/*
|
|
* No mangling needed, convert to uppercase
|
|
*/
|
|
tu(OutName);
|
|
}
|
|
|
|
free(p);
|
|
}
|
|
|
|
|