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/*
* DOS file system functions
*
* Copyright 1993 Erik Bos
* Copyright 1996 Alexandre Julliard
*/
#include <ctype.h>
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/stat.h>
#include <time.h>
#include <sys/statfs.h>
#endif
#include "windows.h"
#include "dos_fs.h"
#include "drive.h"
#include "file.h"
#include "msdos.h"
#include "stddebug.h"
#include "debug.h"
/* Chars we don't want to see in DOS file names */
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static const char *DOSFS_Devices[][2] =
{
{ "CON", "" },
{ "PRN", "" },
{ "NUL", "/dev/null" },
{ "AUX", "" },
{ "LPT1", "" },
{ "LPT2", "" },
{ "LPT3", "" },
{ "LPT4", "" },
{ "COM1", "" },
{ "COM2", "" },
{ "COM3", "" },
{ "COM4", "" }
};
#define GET_DRIVE(path) \
(((path)[1] == ':') ? toupper((path)[0]) - 'A' : DOSFS_CurDrive)
/* DOS extended error status */
WORD DOS_ExtendedError;
BYTE DOS_ErrorClass;
BYTE DOS_ErrorAction;
BYTE DOS_ErrorLocus;
/***********************************************************************
* DOSFS_ValidDOSName
*
* Return 1 if Unix file 'name' is also a valid MS-DOS name
* (i.e. contains only valid DOS chars, lower-case only, fits in 8.3 format).
* File name can be terminated by '\0', '\\' or '/'.
*/
static int DOSFS_ValidDOSName( const char *name, int ignore_case )
static const char invalid_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" INVALID_DOS_CHARS;
const char *invalid = ignore_case ? (invalid_chars + 26) : invalid_chars;
int len = 0;
if (*p == '.')
{
/* Check for "." and ".." */
p++;
if (*p == '.') p++;
/* All other names beginning with '.' are invalid */
return (IS_END_OF_NAME(*p));
}
while (!IS_END_OF_NAME(*p))
{
if (strchr( invalid, *p )) return 0; /* Invalid char */
if (*p == '.') break; /* Start of the extension */
if (++len > 8) return 0; /* Name too long */
p++;
}
if (*p != '.') return 1; /* End of name */
p++;
if (IS_END_OF_NAME(*p)) return 0; /* Empty extension not allowed */
len = 0;
while (!IS_END_OF_NAME(*p))
{
if (strchr( invalid, *p )) return 0; /* Invalid char */
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if (*p == '.') return 0; /* Second extension not allowed */
if (++len > 3) return 0; /* Extension too long */
p++;
}
return 1;
}
/***********************************************************************
* DOSFS_CheckDotDot
*
* Remove all '.' and '..' at the beginning of 'name'.
*/
static const char * DOSFS_CheckDotDot( const char *name, char *buffer,
char sep , int *len )
{
char *p = buffer + strlen(buffer);
while (*name == '.')
{
if (IS_END_OF_NAME(name[1]))
{
name++;
while ((*name == '\\') || (*name == '/')) name++;
}
else if ((name[1] == '.') && IS_END_OF_NAME(name[2]))
{
name += 2;
while ((*name == '\\') || (*name == '/')) name++;
while ((p > buffer) && (*p != sep)) { p--; (*len)++; }
*p = '\0'; /* Remove trailing separator */
}
else break;
}
return name;
}
/***********************************************************************
* DOSFS_ToDosFCBFormat
*
* Convert a file name to DOS FCB format (8+3 chars, padded with blanks),
* expanding wild cards and converting to upper-case in the process.
* File name can be terminated by '\0', '\\' or '/'.
* Return NULL if the name is not a valid DOS name.
*/
const char *DOSFS_ToDosFCBFormat( const char *name )
{
static const char invalid_chars[] = INVALID_DOS_CHARS;
static char buffer[12];
const char *p = name;
int i;
/* Check for "." and ".." */
if (*p == '.')
{
p++;
strcpy( buffer, ". " );
if (*p == '.') p++;
return (!*p || (*p == '/') || (*p == '\\')) ? buffer : NULL;
}
for (i = 0; i < 8; i++)
{
switch(*p)
{
case '\0':
case '\\':
case '/':
case '.':
buffer[i] = ' ';
break;
case '?':
p++;
/* fall through */
case '*':
buffer[i] = '?';
break;
default:
if (strchr( invalid_chars, *p )) return NULL;
buffer[i] = toupper(*p);
p++;
break;
}
}
if (*p == '*')
{
/* Skip all chars after wildcard up to first dot */
while (*p && (*p != '/') && (*p != '\\') && (*p != '.')) p++;
}
else
{
/* Check if name too long */
if (*p && (*p != '/') && (*p != '\\') && (*p != '.')) return NULL;
}
if (*p == '.') p++; /* Skip dot */
for (i = 8; i < 11; i++)
{
switch(*p)
{
case '\0':
case '\\':
case '/':
buffer[i] = ' ';
break;
case '.':
return NULL; /* Second extension not allowed */
case '?':
p++;
/* fall through */
case '*':
buffer[i] = '?';
break;
default:
if (strchr( invalid_chars, *p )) return NULL;
buffer[i] = toupper(*p);
p++;
break;
}
}
buffer[11] = '\0';
return buffer;
}
/***********************************************************************
* DOSFS_ToDosDTAFormat
*
* Convert a file name from FCB to DTA format (name.ext, null-terminated)
* converting to upper-case in the process.
* File name can be terminated by '\0', '\\' or '/'.
* Return NULL if the name is not a valid DOS name.
*/
const char *DOSFS_ToDosDTAFormat( const char *name )
{
static char buffer[13];
char *p;
memcpy( buffer, name, 8 );
for (p = buffer + 8; (p > buffer) && (p[-1] == ' '); p--);
*p++ = '.';
memcpy( p, name + 8, 3 );
for (p += 3; p[-1] == ' '; p--);
if (p[-1] == '.') p--;
*p = '\0';
return buffer;
}
/***********************************************************************
*
* Check a DOS file name against a mask (both in FCB format).
*/
static int DOSFS_MatchShort( const char *mask, const char *name )
{
int i;
for (i = 11; i > 0; i--, mask++, name++)
if ((*mask != '?') && (*mask != *name)) return 0;
return 1;
}
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/***********************************************************************
* DOSFS_MatchLong
*
* Check a long file name against a mask.
*/
static int DOSFS_MatchLong( const char *mask, const char *name,
int case_sensitive )
{
while (*name && *mask)
{
if (*mask == '*')
{
mask++;
while (*mask == '*') mask++; /* Skip consecutive '*' */
if (!*mask) return 1;
if (case_sensitive) while (*name && (*name != *mask)) name++;
else while (*name && (toupper(*name) != toupper(*mask))) name++;
if (!*name) return 0;
}
else if (*mask != '?')
{
if (case_sensitive)
{
if (*mask != *name) return 0;
}
else if (toupper(*mask) != toupper(*name)) return 0;
}
mask++;
name++;
}
return (!*name && !*mask);
}
/***********************************************************************
* DOSFS_ToDosDateTime
*
* Convert a Unix time in the DOS date/time format.
*/
void DOSFS_ToDosDateTime( time_t unixtime, WORD *pDate, WORD *pTime )
if (pTime)
*pTime = (tm->tm_hour << 11) + (tm->tm_min << 5) + (tm->tm_sec / 2);
if (pDate)
*pDate = ((tm->tm_year - 80) << 9) + ((tm->tm_mon + 1) << 5)
+ tm->tm_mday;
/***********************************************************************
* DOSFS_UnixTimeToFileTime
*
* Convert a Unix time to FILETIME format.
*/
void DOSFS_UnixTimeToFileTime( time_t unixtime, FILETIME *filetime )
{
/* FIXME :-) */
filetime->dwLowDateTime = unixtime;
filetime->dwHighDateTime = 0;
}
/***********************************************************************
* DOSFS_FileTimeToUnixTime
*
* Convert a FILETIME format to Unix time.
*/
time_t DOSFS_FileTimeToUnixTime( FILETIME *filetime )
{
/* FIXME :-) */
return filetime->dwLowDateTime;
}
/***********************************************************************
* DOSFS_Hash
*
* Transform a Unix file name into a hashed DOS name. If the name is a valid
* DOS name, it is converted to upper-case; otherwise it is replaced by a
* hashed version that fits in 8.3 format.
* File name can be terminated by '\0', '\\' or '/'.
*/
const char *DOSFS_Hash( const char *name, int dir_format, int ignore_case )
{
static const char invalid_chars[] = INVALID_DOS_CHARS "~.";
static const char hash_chars[32] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ012345";
static char buffer[13];
const char *p, *ext;
char *dst;
unsigned short hash;
int i;
if (dir_format) strcpy( buffer, " " );
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{
/* Check for '.' and '..' */
if (*name == '.')
{
buffer[0] = '.';
if (!dir_format) buffer[1] = buffer[2] = '\0';
if (name[1] == '.') buffer[1] = '.';
return buffer;
}
/* Simply copy the name, converting to uppercase */
for (dst = buffer; !IS_END_OF_NAME(*name) && (*name != '.'); name++)
*dst++ = toupper(*name);
if (*name == '.')
{
if (dir_format) dst = buffer + 8;
else *dst++ = '.';
for (name++; !IS_END_OF_NAME(*name); name++)
*dst++ = toupper(*name);
}
if (!dir_format) *dst = '\0';
}
else
{
/* Compute the hash code of the file name */
/* If you know something about hash functions, feel free to */
/* insert a better algorithm here... */
if (ignore_case)
{
for (p = name, hash = 0xbeef; !IS_END_OF_NAME(p[1]); p++)
hash = (hash << 3) ^ (hash >> 5) ^ tolower(*p) ^ (tolower(p[1]) << 8);
hash = (hash << 3) ^ (hash >> 5) ^ tolower(*p); /* Last character*/
}
else
{
for (p = name, hash = 0xbeef; !IS_END_OF_NAME(p[1]); p++)
hash = (hash << 3) ^ (hash >> 5) ^ *p ^ (p[1] << 8);
hash = (hash << 3) ^ (hash >> 5) ^ *p; /* Last character */
}
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/* Find last dot for start of the extension */
for (p = name+1, ext = NULL; !IS_END_OF_NAME(*p); p++)
if (*p == '.') ext = p;
if (ext && IS_END_OF_NAME(ext[1]))
ext = NULL; /* Empty extension ignored */
/* Copy first 4 chars, replacing invalid chars with '_' */
for (i = 4, p = name, dst = buffer; i > 0; i--, p++)
{
if (IS_END_OF_NAME(*p) || (p == ext)) break;
*dst++ = strchr( invalid_chars, *p ) ? '_' : toupper(*p);
}
/* Pad to 5 chars with '~' */
while (i-- >= 0) *dst++ = '~';
/* Insert hash code converted to 3 ASCII chars */
*dst++ = hash_chars[(hash >> 10) & 0x1f];
*dst++ = hash_chars[(hash >> 5) & 0x1f];
*dst++ = hash_chars[hash & 0x1f];
/* Copy the first 3 chars of the extension (if any) */
if (ext)
{
if (!dir_format) *dst++ = '.';
for (i = 3, ext++; (i > 0) && !IS_END_OF_NAME(*ext); i--, ext++)
*dst++ = toupper(*ext);
}
if (!dir_format) *dst = '\0';
}
return buffer;
}
/***********************************************************************
* DOSFS_FindUnixName
*
* Find the Unix file name in a given directory that corresponds to
* a file name (either in Unix or DOS format).
* File name can be terminated by '\0', '\\' or '/'.
* Return 1 if OK, 0 if no file name matches.
*/
static int DOSFS_FindUnixName( const char *path, const char *name,
{
DIR *dir;
struct dirent *dirent;
const char *dos_name = DOSFS_ToDosFCBFormat( name );
const char *p = strchr( name, '/' );
int len = p ? (int)(p - name) : strlen(name);
dprintf_dosfs( stddeb, "DOSFS_FindUnixName: %s %s\n", path, name );
if ((p = strchr( name, '\\' ))) len = MIN( (int)(p - name), len );
if (!(dir = opendir( path )))
{
dprintf_dosfs( stddeb, "DOSFS_FindUnixName(%s,%s): can't open dir\n",
path, name );
return 0;
}
while ((dirent = readdir( dir )) != NULL)
{
/* Check against Unix name */
if (len == strlen(dirent->d_name))
{
if (drive_flags & DRIVE_CASE_SENSITIVE)
{
if (!lstrncmp32A( dirent->d_name, name, len )) break;
}
else
{
if (!lstrncmpi32A( dirent->d_name, name, len )) break;
}
}
if (dos_name)
{
/* Check against hashed DOS name */
const char *hash_name = DOSFS_Hash( dirent->d_name, TRUE,
!(drive_flags & DRIVE_CASE_SENSITIVE) );
if (!strcmp( dos_name, hash_name )) break;
}
}
if (dirent) lstrcpyn32A( buffer, dirent->d_name, maxlen );
closedir( dir );
dprintf_dosfs( stddeb, "DOSFS_FindUnixName(%s,%s) -> %s\n",
path, name, dirent ? buffer : "** Not found **" );
return (dirent != NULL);
}
/***********************************************************************
* DOSFS_IsDevice
*
* Check if a DOS file name represents a DOS device. Returns the name
* of the associated Unix device, or NULL if not found.
*/
const char *DOSFS_IsDevice( const char *name )
{
int i;
const char *p;
if ((p = strrchr( name, '/' ))) name = p + 1;
if ((p = strrchr( name, '\\' ))) name = p + 1;
for (i = 0; i < sizeof(DOSFS_Devices)/sizeof(DOSFS_Devices[0]); i++)
{
const char *dev = DOSFS_Devices[i][0];
{
p = name + strlen( dev );
if (!*p || (*p == '.')) return DOSFS_Devices[i][1];
}
}
return NULL;
}
/***********************************************************************
* DOSFS_GetUnixFileName
*
* Convert a file name (DOS or mixed DOS/Unix format) to a valid Unix name.
* Return NULL if one of the path components does not exist. The last path
* component is only checked if 'check_last' is non-zero.
*/
const char * DOSFS_GetUnixFileName( const char * name, int check_last )
{
static char buffer[MAX_PATHNAME_LEN];
int drive, len, found;
char *p, *root;
dprintf_dosfs( stddeb, "DOSFS_GetUnixFileName: %s\n", name );
{
drive = toupper(name[0]) - 'A';
name += 2;
}
else if (name[0] == '/') /* Absolute Unix path? */
{
if ((drive = DRIVE_FindDriveRoot( &name )) == -1)
{
fprintf( stderr, "Warning: %s not accessible from a DOS drive\n",
name );
/* Assume it really was a DOS name */
drive = DRIVE_GetCurrentDrive();
}
}
else drive = DRIVE_GetCurrentDrive();
if (!DRIVE_IsValid(drive))
{
DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
return NULL;
}
lstrcpyn32A( buffer, DRIVE_GetRoot(drive), MAX_PATHNAME_LEN );
if (buffer[1]) root = buffer + strlen(buffer);
else root = buffer; /* root directory */
if ((*name == '\\') || (*name == '/'))
{
while ((*name == '\\') || (*name == '/')) name++;
}
else
{
lstrcpyn32A( root + 1, DRIVE_GetUnixCwd(drive),
MAX_PATHNAME_LEN - (int)(root - buffer) - 1 );
if (root[1]) *root = '/';
}
p = buffer[1] ? buffer + strlen(buffer) : buffer;
len = MAX_PATHNAME_LEN - strlen(buffer);
found = 1;
while (*name && found)
{
const char *newname = DOSFS_CheckDotDot( name, root, '/', &len );
if (newname != name)
{
p = root + strlen(root);
name = newname;
continue;
}
if (len <= 1)
{
DOS_ERROR( ER_PathNotFound, EC_NotFound, SA_Abort, EL_Disk );
return NULL;
}
if ((found = DOSFS_FindUnixName( buffer, name, p+1, len-1, flags )))
{
*p = '/';
len -= strlen(p);
p += strlen(p);
while (!IS_END_OF_NAME(*name)) name++;
}
{
*p++ = '/';
for (len--; !IS_END_OF_NAME(*name) && (len > 1); name++, len--)
*p++ = tolower(*name);
*p = '\0';
}
while ((*name == '\\') || (*name == '/')) name++;
}
if (!found)
{
DOS_ERROR( ER_FileNotFound, EC_NotFound, SA_Abort, EL_Disk );
DOS_ERROR( ER_PathNotFound, EC_NotFound, SA_Abort, EL_Disk );
return NULL;
}
}
if (!buffer[0]) strcpy( buffer, "/" );
dprintf_dosfs( stddeb, "DOSFS_GetUnixFileName: returning %s\n", buffer );
return buffer;
}
/***********************************************************************
* DOSFS_GetDosTrueName
*
* Convert a file name (DOS or Unix format) to a complete DOS name.
* Return NULL if the path name is invalid or too long.
* The unix_format flag is a hint that the file name is in Unix format.
*/
const char * DOSFS_GetDosTrueName( const char *name, int unix_format )
{
static char buffer[MAX_PATHNAME_LEN];
int drive, len;
char *p;
dprintf_dosfs( stddeb, "DOSFS_GetDosTrueName(%s,%d)\n", name, unix_format);
{
drive = toupper(name[0]) - 'A';
name += 2;
}
else if (name[0] == '/') /* Absolute Unix path? */
{
if ((drive = DRIVE_FindDriveRoot( &name )) == -1)
{
fprintf( stderr, "Warning: %s not accessible from a DOS drive\n",
name );
/* Assume it really was a DOS name */
drive = DRIVE_GetCurrentDrive();
}
}
else drive = DRIVE_GetCurrentDrive();
if (!DRIVE_IsValid(drive))
{
DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
return NULL;
}
p = buffer;
*p++ = 'A' + drive;
*p++ = ':';
if (IS_END_OF_NAME(*name))
{
while ((*name == '\\') || (*name == '/')) name++;
}
else
{
lstrcpyn32A( p, DRIVE_GetDosCwd(drive), sizeof(buffer) - 3 );
while (*name)
{
const char *newname = DOSFS_CheckDotDot( name, buffer+2, '\\', &len );
if (newname != name)
{
p = buffer + strlen(buffer);
name = newname;
continue;
}
if (len <= 1)
{
DOS_ERROR( ER_PathNotFound, EC_NotFound, SA_Abort, EL_Disk );
return NULL;
}
*p++ = '\\';
if (unix_format) /* Hash it into a DOS name */
{
lstrcpyn32A( p, DOSFS_Hash( name, FALSE,
!(flags & DRIVE_CASE_SENSITIVE) ),
len );
len -= strlen(p);
p += strlen(p);
while (!IS_END_OF_NAME(*name)) name++;
}
else /* Already DOS format, simply upper-case it */
{
while (!IS_END_OF_NAME(*name) && (len > 1))
{
*p++ = toupper(*name);
name++;
len--;
}
}
while ((*name == '\\') || (*name == '/')) name++;
}
if (!buffer[2])
{
buffer[2] = '\\';
buffer[3] = '\0';
}
dprintf_dosfs( stddeb, "DOSFS_GetDosTrueName: returning %s\n", buffer );
return buffer;
}
/***********************************************************************
* DOSFS_FindNext
*
* Find the next matching file. Return the number of entries read to find
* the matching one, or 0 if no more entries.
* 'short_mask' is the 8.3 mask (in FCB format), 'long_mask' is the long
* file name mask. Either or both can be NULL.
int DOSFS_FindNext( const char *path, const char *short_mask,
const char *long_mask, int drive, BYTE attr,
int skip, DOS_DIRENT *entry )
static char buffer[MAX_PATHNAME_LEN];
static int cur_pos = 0;
if ((attr & ~(FA_UNUSED | FA_ARCHIVE | FA_RDONLY)) == FA_LABEL)
{
if (skip) return 0;
strcpy( entry->name, DRIVE_GetLabel( drive ) );
entry->attr = FA_LABEL;
entry->size = 0;
DOSFS_ToDosDateTime( time(NULL), &entry->date, &entry->time );
/* Check the cached directory */
if (dir && !strcmp( buffer, path ) && (cur_pos <= skip)) skip -= cur_pos;
else /* Not in the cache, open it anew */
{
dprintf_dosfs( stddeb, "DOSFS_FindNext: cache miss, path=%s skip=%d buf=%s cur=%d\n",
path, skip, buffer, cur_pos );
cur_pos = skip;
if (dir) closedir(dir);
if (!(dir = opendir( path ))) return 0;
drive_path = path;
drive_root = 0;
if (DRIVE_FindDriveRoot( &drive_path ) != -1)
{
while ((*drive_path == '/') || (*drive_path == '\\')) drive_path++;
if (!*drive_path) drive_root = 1;
}
dprintf_dosfs(stddeb, "DOSFS_FindNext: drive_root = %d\n", drive_root);
strcat( buffer, "/" );
p = buffer + strlen(buffer);
attr |= FA_UNUSED | FA_ARCHIVE | FA_RDONLY;
while ((dirent = readdir( dir )) != NULL)
{
if (skip-- > 0) continue;
count++;
/* Don't return '.' and '..' in the root of the drive */
if (drive_root && (dirent->d_name[0] == '.') &&
(!dirent->d_name[1] ||
((dirent->d_name[1] == '.') && !dirent->d_name[2]))) continue;
/* Check the long mask */
if (long_mask)
{
if (!DOSFS_MatchLong( long_mask, dirent->d_name,
flags & DRIVE_CASE_SENSITIVE )) continue;
}
/* Check the short mask */
if (short_mask)
{
hash_name = DOSFS_Hash( dirent->d_name, TRUE,
!(flags & DRIVE_CASE_SENSITIVE) );
if (!DOSFS_MatchShort( short_mask, hash_name )) continue;
}
/* Check the file attributes */
lstrcpyn32A( p, dirent->d_name, sizeof(buffer) - (int)(p - buffer) );
if (!FILE_Stat( buffer, &entry->attr, &entry->size,
&entry->date, &entry->time ))
{
fprintf( stderr, "DOSFS_FindNext: can't stat %s\n", buffer );
continue;
}
if (entry->attr & ~attr) continue;
/* We now have a matching entry; fill the result and return */
if (!hash_name)
hash_name = DOSFS_Hash( dirent->d_name, TRUE,
!(flags & DRIVE_CASE_SENSITIVE) );
lstrcpyn32A( entry->unixname, dirent->d_name, sizeof(entry->unixname));
if (!(flags & DRIVE_CASE_PRESERVING)) AnsiLower( entry->unixname );
dprintf_dosfs( stddeb, "DOSFS_FindNext: returning %s %02x %ld\n",
entry->name, entry->attr, entry->size );
cur_pos += count;
p[-1] = '\0'; /* Remove trailing slash in buffer */
/***********************************************************************
* GetShortPathNameA (KERNEL32.271)
*/
DWORD GetShortPathName32A( LPCSTR longpath, LPSTR shortpath, DWORD shortlen )
{
LPCSTR dostruename;
dprintf_dosfs( stddeb, "GetShortPathName32A(%s,%p,%ld)\n",
longpath, shortpath, shortlen );
dostruename = DOSFS_GetDosTrueName( longpath, TRUE );
lstrcpyn32A( shortpath, dostruename, shortlen );
return strlen(dostruename);
}
/***********************************************************************
* GetShortPathNameW (KERNEL32.272)
*/
DWORD GetShortPathName32W( LPCWSTR longpath, LPWSTR shortpath, DWORD shortlen )
{
LPSTR longpatha = STRING32_DupUniToAnsi( longpath );
LPCSTR dostruename = DOSFS_GetDosTrueName( longpatha, TRUE );
free( longpatha );
lstrcpynAtoW( shortpath, dostruename, shortlen );
return strlen(dostruename);
}
/***********************************************************************
* GetFullPathNameA (KERNEL32.272)
*/
DWORD GetFullPathName32A( LPCSTR fn, DWORD buflen, LPSTR buf, LPSTR *lastpart) {
dprintf_file(stddeb,"GetFullPathNameA(%s)\n",fn);
/* FIXME */
lstrcpyn32A(buf,fn,buflen);
if (lastpart)
*lastpart=strrchr(buf,'\\');
return strlen(fn);
}