files/directory.c

   1 /*
   2  * DOS directories functions
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #include <ctype.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <sys/types.h>
  11 #include <sys/stat.h>
  12 #include <unistd.h>
  13 #include <errno.h>
  14 #include <sys/errno.h>
  15
  16 #include "winbase.h"
  17 #include "wine/winbase16.h"
  18 #include "wine/winestring.h"
  19 #include "winerror.h"
  20 #include "process.h"
  21 #include "drive.h"
  22 #include "file.h"
  23 #include "heap.h"
  24 #include "msdos.h"
  25 #include "options.h"
  26 #include "debug.h"
  27
  28 static DOS_FULL_NAME DIR_Windows;
  29 static DOS_FULL_NAME DIR_System;
  30
  31
  32 /***********************************************************************
  33  *           DIR_GetPath
  34  *
  35  * Get a path name from the wine.ini file and make sure it is valid.
  36  */
  37 static int DIR_GetPath( const char *keyname, const char *defval,
  38                         DOS_FULL_NAME *full_name )
  39 {
  40     char path[MAX_PATHNAME_LEN];
  41     BY_HANDLE_FILE_INFORMATION info;
  42
  43     PROFILE_GetWineIniString( "wine", keyname, defval, path, sizeof(path) );
  44     if (!DOSFS_GetFullName( path, TRUE, full_name ) ||
  45         !FILE_Stat( full_name->long_name, &info ) ||
  46         !(info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
  47     {
  48         MSG("Invalid path '%s' for %s directory\n", path, keyname);
  49         return 0;
  50     }
  51     return 1;
  52 }
  53
  54
  55 /***********************************************************************
  56  *           DIR_Init
  57  */
  58 int DIR_Init(void)
  59 {
  60     char path[MAX_PATHNAME_LEN];
  61     DOS_FULL_NAME tmp_dir;
  62     int drive;
  63     const char *cwd;
  64
  65     if (!getcwd( path, MAX_PATHNAME_LEN ))
  66     {
  67         perror( "Could not get current directory" );
  68         return 0;
  69     }
  70     cwd = path;
  71     if ((drive = DRIVE_FindDriveRoot( &cwd )) == -1)
  72     {
  73         MSG("Warning: could not find wine.conf [Drive x] entry "
  74             "for current working directory %s; "
  75             "starting in windows directory.\n", cwd );
  76     }
  77     else
  78     {
  79         DRIVE_SetCurrentDrive( drive );
  80         DRIVE_Chdir( drive, cwd );
  81     }
  82
  83     if (!(DIR_GetPath( "windows", "c:\\windows", &DIR_Windows )) ||
  84         !(DIR_GetPath( "system", "c:\\windows\\system", &DIR_System )) ||
  85         !(DIR_GetPath( "temp", "c:\\windows", &tmp_dir )))
  86     {
  87         PROFILE_UsageWineIni();
  88         return 0;
  89     }
  90     if (-1 == access( tmp_dir.long_name, W_OK ))
  91     {
  92         if (errno==EACCES)
  93         {
  94                 MSG("Warning: The Temporary Directory (as specified in your configuration file) is NOT writeable.\n");
  95                 PROFILE_UsageWineIni();
  96         }
  97         else
  98                 MSG("Warning: Access to Temporary Directory failed (%s).\n",
  99                     strerror(errno));
 100     }
 101
 102     if (drive == -1)
 103     {
 104         drive = DIR_Windows.drive;
 105         DRIVE_SetCurrentDrive( drive );
 106         DRIVE_Chdir( drive, DIR_Windows.short_name + 2 );
 107     }
 108
 109     PROFILE_GetWineIniString("wine", "path", "c:\\windows;c:\\windows\\system",
 110                              path, sizeof(path) );
 111
 112     /* Set the environment variables */
 113
 114     SetEnvironmentVariableA( "PATH", path );
 115     SetEnvironmentVariableA( "COMSPEC", "c:\\command.com" );
 116     SetEnvironmentVariableA( "TEMP", tmp_dir.short_name );
 117     SetEnvironmentVariableA( "windir", DIR_Windows.short_name );
 118     SetEnvironmentVariableA( "winsysdir", DIR_System.short_name );
 119
 120     TRACE(dosfs, "WindowsDir = %s (%s)\n",
 121           DIR_Windows.short_name, DIR_Windows.long_name );
 122     TRACE(dosfs, "SystemDir  = %s (%s)\n",
 123           DIR_System.short_name, DIR_System.long_name );
 124     TRACE(dosfs, "TempDir    = %s (%s)\n",
 125           tmp_dir.short_name, tmp_dir.long_name );
 126     TRACE(dosfs, "Path       = %s\n", path );
 127     TRACE(dosfs, "Cwd        = %c:\\%s\n",
 128           'A' + drive, DRIVE_GetDosCwd( drive ) );
 129
 130     return 1;
 131 }
 132
 133
 134 /***********************************************************************
 135  *           GetTempPath32A   (KERNEL32.292)
 136  */
 137 UINT WINAPI GetTempPathA( UINT count, LPSTR path )
 138 {
 139     UINT ret;
 140     if (!(ret = GetEnvironmentVariableA( "TMP", path, count )))
 141         if (!(ret = GetEnvironmentVariableA( "TEMP", path, count )))
 142             if (!(ret = GetCurrentDirectoryA( count, path )))
 143                 return 0;
 144     if (count && (ret < count - 1) && (path[ret-1] != '\\'))
 145     {
 146         path[ret++] = '\\';
 147         path[ret]   = '\0';
 148     }
 149     return ret;
 150 }
 151
 152
 153 /***********************************************************************
 154  *           GetTempPath32W   (KERNEL32.293)
 155  */
 156 UINT WINAPI GetTempPathW( UINT count, LPWSTR path )
 157 {
 158     static const WCHAR tmp[]  = { 'T', 'M', 'P', 0 };
 159     static const WCHAR temp[] = { 'T', 'E', 'M', 'P', 0 };
 160     UINT ret;
 161     if (!(ret = GetEnvironmentVariableW( tmp, path, count )))
 162         if (!(ret = GetEnvironmentVariableW( temp, path, count )))
 163             if (!(ret = GetCurrentDirectoryW( count, path )))
 164                 return 0;
 165     if (count && (ret < count - 1) && (path[ret-1] != '\\'))
 166     {
 167         path[ret++] = '\\';
 168         path[ret]   = '\0';
 169     }
 170     return ret;
 171 }
 172
 173
 174 /***********************************************************************
 175  *           DIR_GetWindowsUnixDir
 176  */
 177 UINT DIR_GetWindowsUnixDir( LPSTR path, UINT count )
 178 {
 179     if (path) lstrcpynA( path, DIR_Windows.long_name, count );
 180     return strlen( DIR_Windows.long_name );
 181 }
 182
 183
 184 /***********************************************************************
 185  *           DIR_GetSystemUnixDir
 186  */
 187 UINT DIR_GetSystemUnixDir( LPSTR path, UINT count )
 188 {
 189     if (path) lstrcpynA( path, DIR_System.long_name, count );
 190     return strlen( DIR_System.long_name );
 191 }
 192
 193
 194 /***********************************************************************
 195  *           GetTempDrive   (KERNEL.92)
 196  */
 197 BYTE WINAPI GetTempDrive( BYTE ignored )
 198 {
 199     char *buffer;
 200     BYTE ret;
 201     UINT len = GetTempPathA( 0, NULL );
 202
 203     if (!(buffer = HeapAlloc( GetProcessHeap(), 0, len + 1 )) )
 204       return DRIVE_GetCurrentDrive() + 'A';
 205
 206     /* FIXME: apparently Windows does something with the ignored byte */
 207     if (!GetTempPathA( len, buffer )) buffer[0] = 'C';
 208     ret = buffer[0];
 209     HeapFree( GetProcessHeap(), 0, buffer );
 210     return toupper(ret);
 211 }
 212
 213
 214 UINT WINAPI WIN16_GetTempDrive( BYTE ignored )
 215 {
 216     /* A closer look at krnl386.exe shows what the SDK doesn't mention:
 217      *
 218      * returns:
 219      *   AL: driveletter
 220      *   AH: ':'                - yes, some kernel code even does stosw with
 221      *                            the returned AX.
 222      *   DX: 1 for success
 223      */
 224     return MAKELONG( GetTempDrive(ignored) | (':' << 8), 1 );
 225 }
 226
 227
 228 /***********************************************************************
 229  *           GetWindowsDirectory16   (KERNEL.134)
 230  */
 231 UINT16 WINAPI GetWindowsDirectory16( LPSTR path, UINT16 count )
 232 {
 233     return (UINT16)GetWindowsDirectoryA( path, count );
 234 }
 235
 236
 237 /***********************************************************************
 238  *           GetWindowsDirectory32A   (KERNEL32.311)
 239  */
 240 UINT WINAPI GetWindowsDirectoryA( LPSTR path, UINT count )
 241 {
 242     if (path) lstrcpynA( path, DIR_Windows.short_name, count );
 243     return strlen( DIR_Windows.short_name );
 244 }
 245
 246
 247 /***********************************************************************
 248  *           GetWindowsDirectory32W   (KERNEL32.312)
 249  */
 250 UINT WINAPI GetWindowsDirectoryW( LPWSTR path, UINT count )
 251 {
 252     if (path) lstrcpynAtoW( path, DIR_Windows.short_name, count );
 253     return strlen( DIR_Windows.short_name );
 254 }
 255
 256
 257 /***********************************************************************
 258  *           GetSystemDirectory16   (KERNEL.135)
 259  */
 260 UINT16 WINAPI GetSystemDirectory16( LPSTR path, UINT16 count )
 261 {
 262     return (UINT16)GetSystemDirectoryA( path, count );
 263 }
 264
 265
 266 /***********************************************************************
 267  *           GetSystemDirectory32A   (KERNEL32.282)
 268  */
 269 UINT WINAPI GetSystemDirectoryA( LPSTR path, UINT count )
 270 {
 271     if (path) lstrcpynA( path, DIR_System.short_name, count );
 272     return strlen( DIR_System.short_name );
 273 }
 274
 275
 276 /***********************************************************************
 277  *           GetSystemDirectory32W   (KERNEL32.283)
 278  */
 279 UINT WINAPI GetSystemDirectoryW( LPWSTR path, UINT count )
 280 {
 281     if (path) lstrcpynAtoW( path, DIR_System.short_name, count );
 282     return strlen( DIR_System.short_name );
 283 }
 284
 285
 286 /***********************************************************************
 287  *           CreateDirectory16   (KERNEL.144)
 288  */
 289 BOOL16 WINAPI CreateDirectory16( LPCSTR path, LPVOID dummy )
 290 {
 291     TRACE(file,"(%s,%p)\n", path, dummy );
 292     return (BOOL16)CreateDirectoryA( path, NULL );
 293 }
 294
 295
 296 /***********************************************************************
 297  *           CreateDirectory32A   (KERNEL32.39)
 298  * RETURNS:
 299  *      TRUE : success
 300  *      FALSE : failure
 301  *              ERROR_DISK_FULL:        on full disk
 302  *              ERROR_ALREADY_EXISTS:   if directory name exists (even as file)
 303  *              ERROR_ACCESS_DENIED:    on permission problems
 304  *              ERROR_FILENAME_EXCED_RANGE: too long filename(s)
 305  */
 306 BOOL WINAPI CreateDirectoryA( LPCSTR path,
 307                                   LPSECURITY_ATTRIBUTES lpsecattribs )
 308 {
 309     DOS_FULL_NAME full_name;
 310
 311     TRACE(file, "(%s,%p)\n", path, lpsecattribs );
 312     if (DOSFS_GetDevice( path ))
 313     {
 314         TRACE(file, "cannot use device '%s'!\n",path);
 315         SetLastError( ERROR_ACCESS_DENIED );
 316         return FALSE;
 317     }
 318     if (!DOSFS_GetFullName( path, FALSE, &full_name )) return 0;
 319     if (mkdir( full_name.long_name, 0777 ) == -1) {
 320         WARN (file, "Errno %i trying to create directory %s.\n", errno, full_name.long_name);
 321         /* the FILE_SetDosError() generated error codes don't match the
 322          * CreateDirectory ones for some errnos */
 323         switch (errno) {
 324         case EEXIST: SetLastError(ERROR_ALREADY_EXISTS); break;
 325         case ENOSPC: SetLastError(ERROR_DISK_FULL); break;
 326         default: FILE_SetDosError();break;
 327         }
 328         return FALSE;
 329     }
 330     return TRUE;
 331 }
 332
 333
 334 /***********************************************************************
 335  *           CreateDirectory32W   (KERNEL32.42)
 336  */
 337 BOOL WINAPI CreateDirectoryW( LPCWSTR path,
 338                                   LPSECURITY_ATTRIBUTES lpsecattribs )
 339 {
 340     LPSTR xpath = HEAP_strdupWtoA( GetProcessHeap(), 0, path );
 341     BOOL ret = CreateDirectoryA( xpath, lpsecattribs );
 342     HeapFree( GetProcessHeap(), 0, xpath );
 343     return ret;
 344 }
 345
 346
 347 /***********************************************************************
 348  *           CreateDirectoryEx32A   (KERNEL32.40)
 349  */
 350 BOOL WINAPI CreateDirectoryExA( LPCSTR template, LPCSTR path,
 351                                     LPSECURITY_ATTRIBUTES lpsecattribs)
 352 {
 353     return CreateDirectoryA(path,lpsecattribs);
 354 }
 355
 356
 357 /***********************************************************************
 358  *           CreateDirectoryEx32W   (KERNEL32.41)
 359  */
 360 BOOL WINAPI CreateDirectoryExW( LPCWSTR template, LPCWSTR path,
 361                                     LPSECURITY_ATTRIBUTES lpsecattribs)
 362 {
 363     return CreateDirectoryW(path,lpsecattribs);
 364 }
 365
 366
 367 /***********************************************************************
 368  *           RemoveDirectory16   (KERNEL)
 369  */
 370 BOOL16 WINAPI RemoveDirectory16( LPCSTR path )
 371 {
 372     return (BOOL16)RemoveDirectoryA( path );
 373 }
 374
 375
 376 /***********************************************************************
 377  *           RemoveDirectory32A   (KERNEL32.437)
 378  */
 379 BOOL WINAPI RemoveDirectoryA( LPCSTR path )
 380 {
 381     DOS_FULL_NAME full_name;
 382
 383     TRACE(file, "'%s'\n", path );
 384
 385     if (DOSFS_GetDevice( path ))
 386     {
 387         TRACE(file, "cannot remove device '%s'!\n", path);
 388         SetLastError( ERROR_FILE_NOT_FOUND );
 389         return FALSE;
 390     }
 391     if (!DOSFS_GetFullName( path, TRUE, &full_name )) return FALSE;
 392     if (rmdir( full_name.long_name ) == -1)
 393     {
 394         FILE_SetDosError();
 395         return FALSE;
 396     }
 397     return TRUE;
 398 }
 399
 400
 401 /***********************************************************************
 402  *           RemoveDirectory32W   (KERNEL32.438)
 403  */
 404 BOOL WINAPI RemoveDirectoryW( LPCWSTR path )
 405 {
 406     LPSTR xpath = HEAP_strdupWtoA( GetProcessHeap(), 0, path );
 407     BOOL ret = RemoveDirectoryA( xpath );
 408     HeapFree( GetProcessHeap(), 0, xpath );
 409     return ret;
 410 }
 411
 412
 413 /***********************************************************************
 414  *           DIR_TryPath
 415  *
 416  * Helper function for DIR_SearchPath.
 417  */
 418 static BOOL DIR_TryPath( const DOS_FULL_NAME *dir, LPCSTR name,
 419                            DOS_FULL_NAME *full_name )
 420 {
 421     LPSTR p_l = full_name->long_name + strlen(dir->long_name) + 1;
 422     LPSTR p_s = full_name->short_name + strlen(dir->short_name) + 1;
 423
 424     if ((p_s >= full_name->short_name + sizeof(full_name->short_name) - 14) ||
 425         (p_l >= full_name->long_name + sizeof(full_name->long_name) - 1))
 426     {
 427         SetLastError( ERROR_PATH_NOT_FOUND );
 428         return FALSE;
 429     }
 430     if (!DOSFS_FindUnixName( dir->long_name, name, p_l,
 431                    sizeof(full_name->long_name) - (p_l - full_name->long_name),
 432                    p_s, DRIVE_GetFlags( dir->drive ) ))
 433         return FALSE;
 434     strcpy( full_name->long_name, dir->long_name );
 435     p_l[-1] = '/';
 436     strcpy( full_name->short_name, dir->short_name );
 437     p_s[-1] = '\\';
 438     return TRUE;
 439 }
 440
 441
 442 /***********************************************************************
 443  *           DIR_TryEnvironmentPath
 444  *
 445  * Helper function for DIR_SearchPath.
 446  */
 447 static BOOL DIR_TryEnvironmentPath( LPCSTR name, DOS_FULL_NAME *full_name )
 448 {
 449     LPSTR path, next, buffer;
 450     BOOL ret = FALSE;
 451     INT len = strlen(name);
 452     DWORD size = GetEnvironmentVariableA( "PATH", NULL, 0 );
 453
 454     if (!size) return FALSE;
 455     if (!(path = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
 456     if (!GetEnvironmentVariableA( "PATH", path, size )) goto done;
 457     next = path;
 458     while (!ret && next)
 459     {
 460         LPSTR cur = next;
 461         while (*cur == ';') cur++;
 462         if (!*cur) break;
 463         next = strchr( cur, ';' );
 464         if (next) *next++ = '\0';
 465         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, strlen(cur) + len + 2)))
 466             goto done;
 467         strcpy( buffer, cur );
 468         strcat( buffer, "\\" );
 469         strcat( buffer, name );
 470         ret = DOSFS_GetFullName( buffer, TRUE, full_name );
 471         HeapFree( GetProcessHeap(), 0, buffer );
 472     }
 473
 474 done:
 475     HeapFree( GetProcessHeap(), 0, path );
 476     return ret;
 477 }
 478
 479
 480 /***********************************************************************
 481  *           DIR_TryModulePath
 482  *
 483  * Helper function for DIR_SearchPath.
 484  */
 485 static BOOL DIR_TryModulePath( LPCSTR name, DOS_FULL_NAME *full_name )
 486 {
 487     PDB *pdb = PROCESS_Current();
 488
 489     /* FIXME: for now, GetModuleFileName32A can't return more */
 490     /* than OFS_MAXPATHNAME. This may change with Win32. */
 491
 492     char buffer[OFS_MAXPATHNAME];
 493     LPSTR p;
 494
 495     if (pdb->flags & PDB32_WIN16_PROC) {
 496         if (!GetCurrentTask()) return FALSE;
 497         if (!GetModuleFileName16( GetCurrentTask(), buffer, sizeof(buffer) ))
 498                 buffer[0]='\0';
 499     } else {
 500         if (!GetModuleFileNameA( 0, buffer, sizeof(buffer) ))
 501                 buffer[0]='\0';
 502     }
 503     if (!(p = strrchr( buffer, '\\' ))) return FALSE;
 504     if (sizeof(buffer) - (++p - buffer) <= strlen(name)) return FALSE;
 505     strcpy( p, name );
 506     return DOSFS_GetFullName( buffer, TRUE, full_name );
 507 }
 508
 509
 510 /***********************************************************************
 511  *           DIR_SearchPath
 512  *
 513  * Implementation of SearchPath32A. 'win32' specifies whether the search
 514  * order is Win16 (module path last) or Win32 (module path first).
 515  *
 516  * FIXME: should return long path names.
 517  */
 518 DWORD DIR_SearchPath( LPCSTR path, LPCSTR name, LPCSTR ext,
 519                       DOS_FULL_NAME *full_name, BOOL win32 )
 520 {
 521     DWORD len;
 522     LPCSTR p;
 523     LPSTR tmp = NULL;
 524     BOOL ret = TRUE;
 525
 526     /* First check the supplied parameters */
 527
 528     p = strrchr( name, '.' );
 529     if (p && !strchr( p, '/' ) && !strchr( p, '\\' ))
 530         ext = NULL;  /* Ignore the specified extension */
 531     if ((*name && (name[1] == ':')) ||
 532         strchr( name, '/' ) || strchr( name, '\\' ))
 533         path = NULL;  /* Ignore path if name already contains a path */
 534     if (path && !*path) path = NULL;  /* Ignore empty path */
 535
 536     len = strlen(name);
 537     if (ext) len += strlen(ext);
 538     if (path) len += strlen(path) + 1;
 539
 540     /* Allocate a buffer for the file name and extension */
 541
 542     if (path || ext)
 543     {
 544         if (!(tmp = HeapAlloc( GetProcessHeap(), 0, len + 1 )))
 545         {
 546             SetLastError( ERROR_OUTOFMEMORY );
 547             return 0;
 548         }
 549         if (path)
 550         {
 551             strcpy( tmp, path );
 552             strcat( tmp, "\\" );
 553             strcat( tmp, name );
 554         }
 555         else strcpy( tmp, name );
 556         if (ext) strcat( tmp, ext );
 557         name = tmp;
 558     }
 559
 560     /* If we have an explicit path, everything's easy */
 561
 562     if (path || (*name && (name[1] == ':')) ||
 563         strchr( name, '/' ) || strchr( name, '\\' ))
 564     {
 565         ret = DOSFS_GetFullName( name, TRUE, full_name );
 566         goto done;
 567     }
 568
 569     /* Try the path of the current executable (for Win32 search order) */
 570
 571     if (win32 && DIR_TryModulePath( name, full_name )) goto done;
 572
 573     /* Try the current directory */
 574
 575     if (DOSFS_GetFullName( name, TRUE, full_name )) goto done;
 576
 577     /* Try the Windows directory */
 578
 579     if (DIR_TryPath( &DIR_Windows, name, full_name ))
 580         goto done;
 581
 582     /* Try the Windows system directory */
 583
 584     if (DIR_TryPath( &DIR_System, name, full_name ))
 585         goto done;
 586
 587     /* Try the path of the current executable (for Win16 search order) */
 588
 589     if (!win32 && DIR_TryModulePath( name, full_name )) goto done;
 590
 591     /* Try all directories in path */
 592
 593     ret = DIR_TryEnvironmentPath( name, full_name );
 594
 595 done:
 596     if (tmp) HeapFree( GetProcessHeap(), 0, tmp );
 597     return ret;
 598 }
 599
 600
 601 /***********************************************************************
 602  * SearchPath32A [KERNEL32.447]
 603  *
 604  * Searches for a specified file in the search path.
 605  *
 606  * PARAMS
 607  *    path      [I] Path to search
 608  *    name      [I] Filename to search for.
 609  *    ext       [I] File extension to append to file name. The first
 610  *                  character must be a period. This parameter is
 611  *                  specified only if the filename given does not
 612  *                  contain an extension.
 613  *    buflen    [I] size of buffer, in characters
 614  *    buffer    [O] buffer for found filename
 615  *    lastpart  [O] address of pointer to last used character in
 616  *                  buffer (the final '\')
 617  *
 618  * RETURNS
 619  *    Success: length of string copied into buffer, not including
 620  *             terminating null character. If the filename found is
 621  *             longer than the length of the buffer, the length of the
 622  *             filename is returned.
 623  *    Failure: Zero
 624  *
 625  * NOTES
 626  *    Should call SetLastError(but currently doesn't).
 627  */
 628 DWORD WINAPI SearchPathA( LPCSTR path, LPCSTR name, LPCSTR ext, DWORD buflen,
 629                             LPSTR buffer, LPSTR *lastpart )
 630 {
 631     LPSTR p, res;
 632     DOS_FULL_NAME full_name;
 633
 634     if (!DIR_SearchPath( path, name, ext, &full_name, TRUE )) return 0;
 635     lstrcpynA( buffer, full_name.short_name, buflen );
 636     res = full_name.long_name +
 637               strlen(DRIVE_GetRoot( full_name.short_name[0] - 'A' ));
 638     while (*res == '/') res++;
 639     if (buflen)
 640     {
 641         if (buflen > 3) lstrcpynA( buffer + 3, res, buflen - 3 );
 642         for (p = buffer; *p; p++) if (*p == '/') *p = '\\';
 643         if (lastpart) *lastpart = strrchr( buffer, '\\' ) + 1;
 644     }
 645     TRACE(dosfs, "Returning %d\n", strlen(res) + 3 );
 646     return strlen(res) + 3;
 647 }
 648
 649
 650 /***********************************************************************
 651  *           SearchPath32W   (KERNEL32.448)
 652  */
 653 DWORD WINAPI SearchPathW( LPCWSTR path, LPCWSTR name, LPCWSTR ext,
 654                             DWORD buflen, LPWSTR buffer, LPWSTR *lastpart )
 655 {
 656     LPWSTR p;
 657     LPSTR res;
 658     DOS_FULL_NAME full_name;
 659
 660     LPSTR pathA = HEAP_strdupWtoA( GetProcessHeap(), 0, path );
 661     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
 662     LPSTR extA  = HEAP_strdupWtoA( GetProcessHeap(), 0, ext );
 663     DWORD ret = DIR_SearchPath( pathA, nameA, extA, &full_name, TRUE );
 664     HeapFree( GetProcessHeap(), 0, extA );
 665     HeapFree( GetProcessHeap(), 0, nameA );
 666     HeapFree( GetProcessHeap(), 0, pathA );
 667     if (!ret) return 0;
 668
 669     lstrcpynAtoW( buffer, full_name.short_name, buflen );
 670     res = full_name.long_name +
 671               strlen(DRIVE_GetRoot( full_name.short_name[0] - 'A' ));
 672     while (*res == '/') res++;
 673     if (buflen)
 674     {
 675         if (buflen > 3) lstrcpynAtoW( buffer + 3, res, buflen - 3 );
 676         for (p = buffer; *p; p++) if (*p == '/') *p = '\\';
 677         if (lastpart)
 678         {
 679             for (p = *lastpart = buffer; *p; p++)
 680                 if (*p == '\\') *lastpart = p + 1;
 681         }
 682     }
 683     return strlen(res) + 3;
 684 }
 685
 686