dlls/kernel32/volume.c

   1 /*
   2  * Volume management functions
   3  *
   4  * Copyright 1993 Erik Bos
   5  * Copyright 1996, 2004 Alexandre Julliard
   6  * Copyright 1999 Petr Tomasek
   7  * Copyright 2000 Andreas Mohr
   8  * Copyright 2003 Eric Pouech
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <stdarg.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31
  32 #include "ntstatus.h"
  33 #define WIN32_NO_STATUS
  34 #include "windef.h"
  35 #include "winbase.h"
  36 #include "winnls.h"
  37 #include "winternl.h"
  38 #include "winioctl.h"
  39 #include "ntddcdrm.h"
  40 #define WINE_MOUNTMGR_EXTENSIONS
  41 #include "ddk/mountmgr.h"
  42 #include "kernel_private.h"
  43 #include "wine/library.h"
  44 #include "wine/unicode.h"
  45 #include "wine/debug.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(volume);
  48
  49 #define BLOCK_SIZE 2048
  50 #define SUPERBLOCK_SIZE BLOCK_SIZE
  51 #define SYMBOLIC_LINK_QUERY 0x0001
  52
  53 #define CDFRAMES_PERSEC         75
  54 #define CDFRAMES_PERMIN         (CDFRAMES_PERSEC * 60)
  55 #define FRAME_OF_ADDR(a)        ((a)[1] * CDFRAMES_PERMIN + (a)[2] * CDFRAMES_PERSEC + (a)[3])
  56 #define FRAME_OF_TOC(toc, idx)  FRAME_OF_ADDR((toc)->TrackData[(idx) - (toc)->FirstTrack].Address)
  57
  58 #define GETWORD(buf,off)  MAKEWORD(buf[(off)],buf[(off+1)])
  59 #define GETLONG(buf,off)  MAKELONG(GETWORD(buf,off),GETWORD(buf,off+2))
  60
  61 enum fs_type
  62 {
  63     FS_ERROR,    /* error accessing the device */
  64     FS_UNKNOWN,  /* unknown file system */
  65     FS_FAT1216,
  66     FS_FAT32,
  67     FS_ISO9660,
  68     FS_UDF       /* For reference [E] = Ecma-167.pdf, [U] = udf260.pdf */
  69 };
  70
  71 /* read a Unix symlink; returned buffer must be freed by caller */
  72 static char *read_symlink( const char *path )
  73 {
  74     char *buffer;
  75     int ret, size = 128;
  76
  77     for (;;)
  78     {
  79         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
  80         {
  81             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
  82             return 0;
  83         }
  84         ret = readlink( path, buffer, size );
  85         if (ret == -1)
  86         {
  87             FILE_SetDosError();
  88             HeapFree( GetProcessHeap(), 0, buffer );
  89             return 0;
  90         }
  91         if (ret != size)
  92         {
  93             buffer[ret] = 0;
  94             return buffer;
  95         }
  96         HeapFree( GetProcessHeap(), 0, buffer );
  97         size *= 2;
  98     }
  99 }
 100
 101 /* get the path of a dos device symlink in the $WINEPREFIX/dosdevices directory */
 102 static char *get_dos_device_path( LPCWSTR name )
 103 {
 104     const char *config_dir = wine_get_config_dir();
 105     char *buffer, *dev;
 106     int i;
 107
 108     if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
 109                               strlen(config_dir) + sizeof("/dosdevices/") + 5 )))
 110     {
 111         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 112         return NULL;
 113     }
 114     strcpy( buffer, config_dir );
 115     strcat( buffer, "/dosdevices/" );
 116     dev = buffer + strlen(buffer);
 117     /* no codepage conversion, DOS device names are ASCII anyway */
 118     for (i = 0; i < 5; i++)
 119         if (!(dev[i] = (char)tolowerW(name[i]))) break;
 120     dev[5] = 0;
 121     return buffer;
 122 }
 123
 124 /* read the contents of an NT symlink object */
 125 static NTSTATUS read_nt_symlink( const WCHAR *name, WCHAR *target, DWORD size )
 126 {
 127     NTSTATUS status;
 128     OBJECT_ATTRIBUTES attr;
 129     UNICODE_STRING nameW;
 130     HANDLE handle;
 131
 132     attr.Length = sizeof(attr);
 133     attr.RootDirectory = 0;
 134     attr.Attributes = OBJ_CASE_INSENSITIVE;
 135     attr.ObjectName = &nameW;
 136     attr.SecurityDescriptor = NULL;
 137     attr.SecurityQualityOfService = NULL;
 138     RtlInitUnicodeString( &nameW, name );
 139
 140     if (!(status = NtOpenSymbolicLinkObject( &handle, SYMBOLIC_LINK_QUERY, &attr )))
 141     {
 142         UNICODE_STRING targetW;
 143         targetW.Buffer = target;
 144         targetW.MaximumLength = (size - 1) * sizeof(WCHAR);
 145         status = NtQuerySymbolicLinkObject( handle, &targetW, NULL );
 146         if (!status) target[targetW.Length / sizeof(WCHAR)] = 0;
 147         NtClose( handle );
 148     }
 149     return status;
 150 }
 151
 152 /* open a handle to a device root */
 153 static BOOL open_device_root( LPCWSTR root, HANDLE *handle )
 154 {
 155     static const WCHAR default_rootW[] = {'\\',0};
 156     UNICODE_STRING nt_name;
 157     OBJECT_ATTRIBUTES attr;
 158     IO_STATUS_BLOCK io;
 159     NTSTATUS status;
 160
 161     if (!root) root = default_rootW;
 162     if (!RtlDosPathNameToNtPathName_U( root, &nt_name, NULL, NULL ))
 163     {
 164         SetLastError( ERROR_PATH_NOT_FOUND );
 165         return FALSE;
 166     }
 167     attr.Length = sizeof(attr);
 168     attr.RootDirectory = 0;
 169     attr.Attributes = OBJ_CASE_INSENSITIVE;
 170     attr.ObjectName = &nt_name;
 171     attr.SecurityDescriptor = NULL;
 172     attr.SecurityQualityOfService = NULL;
 173
 174     status = NtOpenFile( handle, 0, &attr, &io, 0,
 175                          FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 176     RtlFreeUnicodeString( &nt_name );
 177     if (status != STATUS_SUCCESS)
 178     {
 179         SetLastError( RtlNtStatusToDosError(status) );
 180         return FALSE;
 181     }
 182     return TRUE;
 183 }
 184
 185 /* query the type of a drive from the mount manager */
 186 static DWORD get_mountmgr_drive_type( LPCWSTR root )
 187 {
 188     HANDLE mgr;
 189     struct mountmgr_unix_drive data;
 190
 191     memset( &data, 0, sizeof(data) );
 192     if (root) data.letter = root[0];
 193     else
 194     {
 195         WCHAR curdir[MAX_PATH];
 196         GetCurrentDirectoryW( MAX_PATH, curdir );
 197         if (curdir[1] != ':' || curdir[2] != '\\') return DRIVE_UNKNOWN;
 198         data.letter = curdir[0];
 199     }
 200
 201     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, GENERIC_READ,
 202                        FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
 203     if (mgr == INVALID_HANDLE_VALUE) return DRIVE_UNKNOWN;
 204
 205     if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_UNIX_DRIVE, &data, sizeof(data), &data,
 206                           sizeof(data), NULL, NULL ) && GetLastError() != ERROR_MORE_DATA)
 207         data.type = DRIVE_UNKNOWN;
 208
 209     CloseHandle( mgr );
 210     return data.type;
 211 }
 212
 213 /* get the label by reading it from a file at the root of the filesystem */
 214 static void get_filesystem_label( const UNICODE_STRING *device, WCHAR *label, DWORD len )
 215 {
 216     static const WCHAR labelW[] = {'.','w','i','n','d','o','w','s','-','l','a','b','e','l',0};
 217     HANDLE handle;
 218     UNICODE_STRING name;
 219     IO_STATUS_BLOCK io;
 220     OBJECT_ATTRIBUTES attr;
 221
 222     label[0] = 0;
 223
 224     attr.Length = sizeof(attr);
 225     attr.RootDirectory = 0;
 226     attr.Attributes = OBJ_CASE_INSENSITIVE;
 227     attr.ObjectName = &name;
 228     attr.SecurityDescriptor = NULL;
 229     attr.SecurityQualityOfService = NULL;
 230
 231     name.MaximumLength = device->Length + sizeof(labelW);
 232     name.Length = name.MaximumLength - sizeof(WCHAR);
 233     if (!(name.Buffer = HeapAlloc( GetProcessHeap(), 0, name.MaximumLength ))) return;
 234
 235     memcpy( name.Buffer, device->Buffer, device->Length );
 236     memcpy( name.Buffer + device->Length / sizeof(WCHAR), labelW, sizeof(labelW) );
 237     if (!NtOpenFile( &handle, GENERIC_READ, &attr, &io, FILE_SHARE_READ|FILE_SHARE_WRITE,
 238                      FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT ))
 239     {
 240         char buffer[256], *p;
 241         DWORD size;
 242
 243         if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
 244         CloseHandle( handle );
 245         p = buffer + size;
 246         while (p > buffer && (p[-1] == ' ' || p[-1] == '\r' || p[-1] == '\n')) p--;
 247         *p = 0;
 248         if (!MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, label, len ))
 249             label[len-1] = 0;
 250     }
 251     RtlFreeUnicodeString( &name );
 252 }
 253
 254 /* get the serial number by reading it from a file at the root of the filesystem */
 255 static DWORD get_filesystem_serial( const UNICODE_STRING *device )
 256 {
 257     static const WCHAR serialW[] = {'.','w','i','n','d','o','w','s','-','s','e','r','i','a','l',0};
 258     HANDLE handle;
 259     UNICODE_STRING name;
 260     IO_STATUS_BLOCK io;
 261     OBJECT_ATTRIBUTES attr;
 262     DWORD ret = 0;
 263
 264     attr.Length = sizeof(attr);
 265     attr.RootDirectory = 0;
 266     attr.Attributes = OBJ_CASE_INSENSITIVE;
 267     attr.ObjectName = &name;
 268     attr.SecurityDescriptor = NULL;
 269     attr.SecurityQualityOfService = NULL;
 270
 271     name.MaximumLength = device->Length + sizeof(serialW);
 272     name.Length = name.MaximumLength - sizeof(WCHAR);
 273     if (!(name.Buffer = HeapAlloc( GetProcessHeap(), 0, name.MaximumLength ))) return 0;
 274
 275     memcpy( name.Buffer, device->Buffer, device->Length );
 276     memcpy( name.Buffer + device->Length / sizeof(WCHAR), serialW, sizeof(serialW) );
 277     if (!NtOpenFile( &handle, GENERIC_READ, &attr, &io, FILE_SHARE_READ|FILE_SHARE_WRITE,
 278                      FILE_SYNCHRONOUS_IO_NONALERT ))
 279     {
 280         char buffer[32];
 281         DWORD size;
 282
 283         if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
 284         CloseHandle( handle );
 285         buffer[size] = 0;
 286         ret = strtoul( buffer, NULL, 16 );
 287     }
 288     RtlFreeUnicodeString( &name );
 289     return ret;
 290 }
 291
 292
 293 /******************************************************************
 294  *              VOLUME_FindCdRomDataBestVoldesc
 295  */
 296 static DWORD VOLUME_FindCdRomDataBestVoldesc( HANDLE handle )
 297 {
 298     BYTE cur_vd_type, max_vd_type = 0;
 299     BYTE buffer[0x800];
 300     DWORD size, offs, best_offs = 0, extra_offs = 0;
 301
 302     for (offs = 0x8000; offs <= 0x9800; offs += 0x800)
 303     {
 304         /* if 'CDROM' occurs at position 8, this is a pre-iso9660 cd, and
 305          * the volume label is displaced forward by 8
 306          */
 307         if (SetFilePointer( handle, offs, NULL, FILE_BEGIN ) != offs) break;
 308         if (!ReadFile( handle, buffer, sizeof(buffer), &size, NULL )) break;
 309         if (size != sizeof(buffer)) break;
 310         /* check for non-ISO9660 signature */
 311         if (!memcmp( buffer + 11, "ROM", 3 )) extra_offs = 8;
 312         cur_vd_type = buffer[extra_offs];
 313         if (cur_vd_type == 0xff) /* voldesc set terminator */
 314             break;
 315         if (cur_vd_type > max_vd_type)
 316         {
 317             max_vd_type = cur_vd_type;
 318             best_offs = offs + extra_offs;
 319         }
 320     }
 321     return best_offs;
 322 }
 323
 324
 325 /***********************************************************************
 326  *           VOLUME_ReadFATSuperblock
 327  */
 328 static enum fs_type VOLUME_ReadFATSuperblock( HANDLE handle, BYTE *buff )
 329 {
 330     DWORD size;
 331
 332     /* try a fixed disk, with a FAT partition */
 333     if (SetFilePointer( handle, 0, NULL, FILE_BEGIN ) != 0 ||
 334         !ReadFile( handle, buff, SUPERBLOCK_SIZE, &size, NULL ))
 335     {
 336         if (GetLastError() == ERROR_BAD_DEV_TYPE) return FS_UNKNOWN;  /* not a real device */
 337         return FS_ERROR;
 338     }
 339
 340     if (size < SUPERBLOCK_SIZE) return FS_UNKNOWN;
 341
 342     /* FIXME: do really all FAT have their name beginning with
 343      * "FAT" ? (At least FAT12, FAT16 and FAT32 have :)
 344      */
 345     if (!memcmp(buff+0x36, "FAT", 3) || !memcmp(buff+0x52, "FAT", 3))
 346     {
 347         /* guess which type of FAT we have */
 348         int reasonable;
 349         unsigned int sectors,
 350                      sect_per_fat,
 351                      total_sectors,
 352                      num_boot_sectors,
 353                      num_fats,
 354                      num_root_dir_ents,
 355                      bytes_per_sector,
 356                      sectors_per_cluster,
 357                      nclust;
 358         sect_per_fat = GETWORD(buff, 0x16);
 359         if (!sect_per_fat) sect_per_fat = GETLONG(buff, 0x24);
 360         total_sectors = GETWORD(buff, 0x13);
 361         if (!total_sectors)
 362             total_sectors = GETLONG(buff, 0x20);
 363         num_boot_sectors = GETWORD(buff, 0x0e);
 364         num_fats =  buff[0x10];
 365         num_root_dir_ents = GETWORD(buff, 0x11);
 366         bytes_per_sector = GETWORD(buff, 0x0b);
 367         sectors_per_cluster = buff[0x0d];
 368         /* check if the parameters are reasonable and will not cause
 369          * arithmetic errors in the calculation */
 370         reasonable = num_boot_sectors < total_sectors &&
 371                      num_fats < 16 &&
 372                      bytes_per_sector >= 512 && bytes_per_sector % 512 == 0 &&
 373                      sectors_per_cluster >= 1;
 374         if (!reasonable) return FS_UNKNOWN;
 375         sectors =  total_sectors - num_boot_sectors - num_fats * sect_per_fat -
 376             (num_root_dir_ents * 32 + bytes_per_sector - 1) / bytes_per_sector;
 377         nclust = sectors / sectors_per_cluster;
 378         if ((buff[0x42] == 0x28 || buff[0x42] == 0x29) &&
 379                 !memcmp(buff+0x52, "FAT", 3)) return FS_FAT32;
 380         if (nclust < 65525)
 381         {
 382             if ((buff[0x26] == 0x28 || buff[0x26] == 0x29) &&
 383                     !memcmp(buff+0x36, "FAT", 3))
 384                 return FS_FAT1216;
 385         }
 386     }
 387     return FS_UNKNOWN;
 388 }
 389
 390
 391 /***********************************************************************
 392  *           VOLUME_ReadCDBlock
 393  */
 394 static BOOL VOLUME_ReadCDBlock( HANDLE handle, BYTE *buff, INT offs )
 395 {
 396     DWORD size, whence = offs >= 0 ? FILE_BEGIN : FILE_END;
 397
 398     if (SetFilePointer( handle, offs, NULL, whence ) != offs ||
 399         !ReadFile( handle, buff, SUPERBLOCK_SIZE, &size, NULL ) ||
 400         size != SUPERBLOCK_SIZE)
 401         return FALSE;
 402
 403     return TRUE;
 404 }
 405
 406
 407 /***********************************************************************
 408  *           VOLUME_ReadCDSuperblock
 409  */
 410 static enum fs_type VOLUME_ReadCDSuperblock( HANDLE handle, BYTE *buff )
 411 {
 412     int i;
 413     DWORD offs;
 414
 415     /* Check UDF first as UDF and ISO9660 structures can coexist on the same medium
 416      *  Starting from sector 16, we may find :
 417      *  - a CD-ROM Volume Descriptor Set (ISO9660) containing one or more Volume Descriptors
 418      *  - an Extented Area (UDF) -- [E] 2/8.3.1 and [U] 2.1.7
 419      *  There is no explicit end so read 16 sectors and then give up */
 420     for( i=16; i<16+16; i++)
 421     {
 422         if (!VOLUME_ReadCDBlock(handle, buff, i*BLOCK_SIZE))
 423             continue;
 424
 425         /* We are supposed to check "BEA01", "NSR0x" and "TEA01" IDs + verify tag checksum
 426          *  but we assume the volume is well-formatted */
 427         if (!memcmp(&buff[1], "BEA01", 5)) return FS_UDF;
 428     }
 429
 430     offs = VOLUME_FindCdRomDataBestVoldesc( handle );
 431     if (!offs) return FS_UNKNOWN;
 432
 433     if (!VOLUME_ReadCDBlock(handle, buff, offs))
 434         return FS_ERROR;
 435
 436     /* check for the iso9660 identifier */
 437     if (!memcmp(&buff[1], "CD001", 5)) return FS_ISO9660;
 438     return FS_UNKNOWN;
 439 }
 440
 441
 442 /**************************************************************************
 443  *                        UDF_Find_PVD
 444  * Find the Primary Volume Descriptor
 445  */
 446 static BOOL UDF_Find_PVD( HANDLE handle, BYTE pvd[] )
 447 {
 448     unsigned int i;
 449     DWORD offset;
 450     INT locations[] = { 256, -1, -257, 512 };
 451
 452     for(i=0; i<sizeof(locations)/sizeof(locations[0]); i++)
 453     {
 454         if (!VOLUME_ReadCDBlock(handle, pvd, locations[i]*BLOCK_SIZE))
 455             return FALSE;
 456
 457         /* Tag Identifier of Anchor Volume Descriptor Pointer is 2 -- [E] 3/10.2.1 */
 458         if (pvd[0]==2 && pvd[1]==0)
 459         {
 460             /* Tag location (Uint32) at offset 12, little-endian */
 461             offset  = pvd[20 + 0];
 462             offset |= pvd[20 + 1] << 8;
 463             offset |= pvd[20 + 2] << 16;
 464             offset |= pvd[20 + 3] << 24;
 465             offset *= BLOCK_SIZE;
 466
 467             if (!VOLUME_ReadCDBlock(handle, pvd, offset))
 468                 return FALSE;
 469
 470             /* Check for the Primary Volume Descriptor Tag Id -- [E] 3/10.1.1 */
 471             if (pvd[0]!=1 || pvd[1]!=0)
 472                 return FALSE;
 473
 474             /* 8 or 16 bits per character -- [U] 2.1.1 */
 475             if (!(pvd[24]==8 || pvd[24]==16))
 476                 return FALSE;
 477
 478             return TRUE;
 479         }
 480     }
 481
 482     return FALSE;
 483 }
 484
 485
 486 /**************************************************************************
 487  *                              VOLUME_GetSuperblockLabel
 488  */
 489 static void VOLUME_GetSuperblockLabel( const UNICODE_STRING *device, HANDLE handle,
 490                                        enum fs_type type, const BYTE *superblock,
 491                                        WCHAR *label, DWORD len )
 492 {
 493     const BYTE *label_ptr = NULL;
 494     DWORD label_len;
 495
 496     switch(type)
 497     {
 498     case FS_ERROR:
 499         label_len = 0;
 500         break;
 501     case FS_UNKNOWN:
 502         get_filesystem_label( device, label, len );
 503         return;
 504     case FS_FAT1216:
 505         label_ptr = superblock + 0x2b;
 506         label_len = 11;
 507         break;
 508     case FS_FAT32:
 509         label_ptr = superblock + 0x47;
 510         label_len = 11;
 511         break;
 512     case FS_ISO9660:
 513         {
 514             BYTE ver = superblock[0x5a];
 515
 516             if (superblock[0x58] == 0x25 && superblock[0x59] == 0x2f &&  /* Unicode ID */
 517                 ((ver == 0x40) || (ver == 0x43) || (ver == 0x45)))
 518             { /* yippee, unicode */
 519                 unsigned int i;
 520
 521                 if (len > 17) len = 17;
 522                 for (i = 0; i < len-1; i++)
 523                     label[i] = (superblock[40+2*i] << 8) | superblock[41+2*i];
 524                 label[i] = 0;
 525                 while (i && label[i-1] == ' ') label[--i] = 0;
 526                 return;
 527             }
 528             label_ptr = superblock + 40;
 529             label_len = 32;
 530             break;
 531         }
 532     case FS_UDF:
 533         {
 534             BYTE pvd[BLOCK_SIZE];
 535
 536             if(!UDF_Find_PVD(handle, pvd))
 537             {
 538                 label_len = 0;
 539                 break;
 540             }
 541
 542             /* [E] 3/10.1.4 and [U] 2.1.1 */
 543             if(pvd[24]==8)
 544             {
 545                 label_ptr = pvd + 24 + 1;
 546                 label_len = pvd[24+32-1];
 547                 break;
 548             }
 549             else
 550             {
 551                 unsigned int i;
 552
 553                 label_len = 1 + pvd[24+32-1];
 554                 for(i=0; i<label_len && i<len; i+=2)
 555                     label[i/2]  = (pvd[24+1 +i] << 8) | pvd[24+1 +i+1];
 556                 label[label_len] = 0;
 557                 return;
 558             }
 559         }
 560     }
 561     if (label_len) RtlMultiByteToUnicodeN( label, (len-1) * sizeof(WCHAR),
 562                                            &label_len, (LPCSTR)label_ptr, label_len );
 563     label_len /= sizeof(WCHAR);
 564     label[label_len] = 0;
 565     while (label_len && label[label_len-1] == ' ') label[--label_len] = 0;
 566 }
 567
 568
 569 /**************************************************************************
 570  *                              UDF_Find_FSD_Sector
 571  * Find the File Set Descriptor used to compute the serial of a UDF volume
 572  */
 573 static int UDF_Find_FSD_Sector( HANDLE handle, BYTE block[] )
 574 {
 575     int i, PVD_sector, PD_sector, PD_length;
 576
 577     if(!UDF_Find_PVD(handle,block))
 578         goto default_sector;
 579
 580     /* Retrieve the tag location of the PVD -- [E] 3/7.2 */
 581     PVD_sector  = block[12 + 0];
 582     PVD_sector |= block[12 + 1] << 8;
 583     PVD_sector |= block[12 + 2] << 16;
 584     PVD_sector |= block[12 + 3] << 24;
 585
 586     /* Find the Partition Descriptor */
 587     for(i=PVD_sector+1; ; i++)
 588     {
 589         if(!VOLUME_ReadCDBlock(handle, block, i*BLOCK_SIZE))
 590             goto default_sector;
 591
 592         /* Partition Descriptor Tag Id -- [E] 3/10.5.1 */
 593         if(block[0]==5 && block[1]==0)
 594             break;
 595
 596         /* Terminating Descriptor Tag Id -- [E] 3/10.9.1 */
 597         if(block[0]==8 && block[1]==0)
 598             goto default_sector;
 599     }
 600
 601     /* Find the partition starting location -- [E] 3/10.5.8 */
 602     PD_sector  = block[188 + 0];
 603     PD_sector |= block[188 + 1] << 8;
 604     PD_sector |= block[188 + 2] << 16;
 605     PD_sector |= block[188 + 3] << 24;
 606
 607     /* Find the partition length -- [E] 3/10.5.9 */
 608     PD_length  = block[192 + 0];
 609     PD_length |= block[192 + 1] << 8;
 610     PD_length |= block[192 + 2] << 16;
 611     PD_length |= block[192 + 3] << 24;
 612
 613     for(i=PD_sector; i<PD_sector+PD_length; i++)
 614     {
 615         if(!VOLUME_ReadCDBlock(handle, block, i*BLOCK_SIZE))
 616             goto default_sector;
 617
 618         /* File Set Descriptor Tag Id -- [E] 3/14.1.1 */
 619         if(block[0]==0 && block[1]==1)
 620             return i;
 621     }
 622
 623 default_sector:
 624     WARN("FSD sector not found, serial may be incorrect\n");
 625     return 257;
 626 }
 627
 628
 629 /**************************************************************************
 630  *                              VOLUME_GetSuperblockSerial
 631  */
 632 static DWORD VOLUME_GetSuperblockSerial( const UNICODE_STRING *device, HANDLE handle,
 633                                          enum fs_type type, const BYTE *superblock )
 634 {
 635     int FSD_sector;
 636     BYTE block[BLOCK_SIZE];
 637
 638     switch(type)
 639     {
 640     case FS_ERROR:
 641         break;
 642     case FS_UNKNOWN:
 643         return get_filesystem_serial( device );
 644     case FS_FAT1216:
 645         return GETLONG( superblock, 0x27 );
 646     case FS_FAT32:
 647         return GETLONG( superblock, 0x33 );
 648     case FS_UDF:
 649         FSD_sector = UDF_Find_FSD_Sector(handle, block);
 650         if (!VOLUME_ReadCDBlock(handle, block, FSD_sector*BLOCK_SIZE))
 651             break;
 652         superblock = block;
 653         /* fallthrough */
 654     case FS_ISO9660:
 655         {
 656             BYTE sum[4];
 657             int i;
 658
 659             sum[0] = sum[1] = sum[2] = sum[3] = 0;
 660             for (i = 0; i < 2048; i += 4)
 661             {
 662                 /* DON'T optimize this into DWORD !! (breaks overflow) */
 663                 sum[0] += superblock[i+0];
 664                 sum[1] += superblock[i+1];
 665                 sum[2] += superblock[i+2];
 666                 sum[3] += superblock[i+3];
 667             }
 668             /*
 669              * OK, another braindead one... argh. Just believe it.
 670              * Me$$ysoft chose to reverse the serial number in NT4/W2K.
 671              * It's true and nobody will ever be able to change it.
 672              */
 673             if ((GetVersion() & 0x80000000) || type == FS_UDF)
 674                 return (sum[3] << 24) | (sum[2] << 16) | (sum[1] << 8) | sum[0];
 675             else
 676                 return (sum[0] << 24) | (sum[1] << 16) | (sum[2] << 8) | sum[3];
 677         }
 678     }
 679     return 0;
 680 }
 681
 682
 683 /**************************************************************************
 684  *                              VOLUME_GetAudioCDSerial
 685  */
 686 static DWORD VOLUME_GetAudioCDSerial( const CDROM_TOC *toc )
 687 {
 688     DWORD serial = 0;
 689     int i;
 690
 691     for (i = 0; i <= toc->LastTrack - toc->FirstTrack; i++)
 692         serial += ((toc->TrackData[i].Address[1] << 16) |
 693                    (toc->TrackData[i].Address[2] << 8) |
 694                    toc->TrackData[i].Address[3]);
 695
 696     /*
 697      * dwStart, dwEnd collect the beginning and end of the disc respectively, in
 698      * frames.
 699      * There it is collected for correcting the serial when there are less than
 700      * 3 tracks.
 701      */
 702     if (toc->LastTrack - toc->FirstTrack + 1 < 3)
 703     {
 704         DWORD dwStart = FRAME_OF_TOC(toc, toc->FirstTrack);
 705         DWORD dwEnd = FRAME_OF_TOC(toc, toc->LastTrack + 1);
 706         serial += dwEnd - dwStart;
 707     }
 708     return serial;
 709 }
 710
 711
 712 /***********************************************************************
 713  *           GetVolumeInformationW   (KERNEL32.@)
 714  */
 715 BOOL WINAPI GetVolumeInformationW( LPCWSTR root, LPWSTR label, DWORD label_len,
 716                                    DWORD *serial, DWORD *filename_len, DWORD *flags,
 717                                    LPWSTR fsname, DWORD fsname_len )
 718 {
 719     static const WCHAR audiocdW[] = {'A','u','d','i','o',' ','C','D',0};
 720     static const WCHAR fatW[] = {'F','A','T',0};
 721     static const WCHAR fat32W[] = {'F','A','T','3','2',0};
 722     static const WCHAR ntfsW[] = {'N','T','F','S',0};
 723     static const WCHAR cdfsW[] = {'C','D','F','S',0};
 724     static const WCHAR udfW[] = {'U','D','F',0};
 725     static const WCHAR default_rootW[] = {'\\',0};
 726
 727     HANDLE handle;
 728     NTSTATUS status;
 729     UNICODE_STRING nt_name;
 730     IO_STATUS_BLOCK io;
 731     OBJECT_ATTRIBUTES attr;
 732     FILE_FS_DEVICE_INFORMATION info;
 733     WCHAR *p;
 734     enum fs_type type = FS_UNKNOWN;
 735     BOOL ret = FALSE;
 736
 737     if (!root) root = default_rootW;
 738     if (!RtlDosPathNameToNtPathName_U( root, &nt_name, NULL, NULL ))
 739     {
 740         SetLastError( ERROR_PATH_NOT_FOUND );
 741         return FALSE;
 742     }
 743     /* there must be exactly one backslash in the name, at the end */
 744     p = memchrW( nt_name.Buffer + 4, '\\', (nt_name.Length - 4) / sizeof(WCHAR) );
 745     if (p != nt_name.Buffer + nt_name.Length / sizeof(WCHAR) - 1)
 746     {
 747         /* check if root contains an explicit subdir */
 748         if (root[0] && root[1] == ':') root += 2;
 749         while (*root == '\\') root++;
 750         if (strchrW( root, '\\' ))
 751             SetLastError( ERROR_DIR_NOT_ROOT );
 752         else
 753             SetLastError( ERROR_INVALID_NAME );
 754         goto done;
 755     }
 756
 757     /* try to open the device */
 758
 759     attr.Length = sizeof(attr);
 760     attr.RootDirectory = 0;
 761     attr.Attributes = OBJ_CASE_INSENSITIVE;
 762     attr.ObjectName = &nt_name;
 763     attr.SecurityDescriptor = NULL;
 764     attr.SecurityQualityOfService = NULL;
 765
 766     nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
 767     status = NtOpenFile( &handle, GENERIC_READ, &attr, &io, FILE_SHARE_READ | FILE_SHARE_WRITE,
 768                          FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 769     nt_name.Length += sizeof(WCHAR);
 770
 771     if (status == STATUS_SUCCESS)
 772     {
 773         BYTE superblock[SUPERBLOCK_SIZE];
 774         CDROM_TOC toc;
 775         DWORD br;
 776
 777         /* check for audio CD */
 778         /* FIXME: we only check the first track for now */
 779         if (DeviceIoControl( handle, IOCTL_CDROM_READ_TOC, NULL, 0, &toc, sizeof(toc), &br, 0 ))
 780         {
 781             if (!(toc.TrackData[0].Control & 0x04))  /* audio track */
 782             {
 783                 TRACE( "%s: found audio CD\n", debugstr_w(nt_name.Buffer) );
 784                 if (label) lstrcpynW( label, audiocdW, label_len );
 785                 if (serial) *serial = VOLUME_GetAudioCDSerial( &toc );
 786                 CloseHandle( handle );
 787                 type = FS_ISO9660;
 788                 goto fill_fs_info;
 789             }
 790             type = VOLUME_ReadCDSuperblock( handle, superblock );
 791         }
 792         else
 793         {
 794             type = VOLUME_ReadFATSuperblock( handle, superblock );
 795             if (type == FS_UNKNOWN) type = VOLUME_ReadCDSuperblock( handle, superblock );
 796         }
 797         TRACE( "%s: found fs type %d\n", debugstr_w(nt_name.Buffer), type );
 798         if (type == FS_ERROR)
 799         {
 800             CloseHandle( handle );
 801             goto done;
 802         }
 803
 804         if (label && label_len) VOLUME_GetSuperblockLabel( &nt_name, handle, type, superblock, label, label_len );
 805         if (serial) *serial = VOLUME_GetSuperblockSerial( &nt_name, handle, type, superblock );
 806         CloseHandle( handle );
 807         goto fill_fs_info;
 808     }
 809     else TRACE( "cannot open device %s: %x\n", debugstr_w(nt_name.Buffer), status );
 810
 811     /* we couldn't open the device, fallback to default strategy */
 812
 813     status = NtOpenFile( &handle, 0, &attr, &io, 0, FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 814     if (status != STATUS_SUCCESS)
 815     {
 816         SetLastError( RtlNtStatusToDosError(status) );
 817         goto done;
 818     }
 819     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsDeviceInformation );
 820     NtClose( handle );
 821     if (status != STATUS_SUCCESS)
 822     {
 823         SetLastError( RtlNtStatusToDosError(status) );
 824         goto done;
 825     }
 826     if (info.DeviceType == FILE_DEVICE_CD_ROM_FILE_SYSTEM) type = FS_ISO9660;
 827
 828     if (label && label_len) get_filesystem_label( &nt_name, label, label_len );
 829     if (serial) *serial = get_filesystem_serial( &nt_name );
 830
 831 fill_fs_info:  /* now fill in the information that depends on the file system type */
 832
 833     switch(type)
 834     {
 835     case FS_ISO9660:
 836         if (fsname) lstrcpynW( fsname, cdfsW, fsname_len );
 837         if (filename_len) *filename_len = 221;
 838         if (flags) *flags = FILE_READ_ONLY_VOLUME;
 839         break;
 840     case FS_UDF:
 841         if (fsname) lstrcpynW( fsname, udfW, fsname_len );
 842         if (filename_len) *filename_len = 255;
 843         if (flags)
 844             *flags = FILE_READ_ONLY_VOLUME | FILE_UNICODE_ON_DISK | FILE_CASE_SENSITIVE_SEARCH;
 845         break;
 846     case FS_FAT1216:
 847         if (fsname) lstrcpynW( fsname, fatW, fsname_len );
 848     case FS_FAT32:
 849         if (type == FS_FAT32 && fsname) lstrcpynW( fsname, fat32W, fsname_len );
 850         if (filename_len) *filename_len = 255;
 851         if (flags) *flags = FILE_CASE_PRESERVED_NAMES;  /* FIXME */
 852         break;
 853     default:
 854         if (fsname) lstrcpynW( fsname, ntfsW, fsname_len );
 855         if (filename_len) *filename_len = 255;
 856         if (flags) *flags = FILE_CASE_PRESERVED_NAMES | FILE_PERSISTENT_ACLS;
 857         break;
 858     }
 859     ret = TRUE;
 860
 861 done:
 862     RtlFreeUnicodeString( &nt_name );
 863     return ret;
 864 }
 865
 866
 867 /***********************************************************************
 868  *           GetVolumeInformationA   (KERNEL32.@)
 869  */
 870 BOOL WINAPI GetVolumeInformationA( LPCSTR root, LPSTR label,
 871                                    DWORD label_len, DWORD *serial,
 872                                    DWORD *filename_len, DWORD *flags,
 873                                    LPSTR fsname, DWORD fsname_len )
 874 {
 875     WCHAR *rootW = NULL;
 876     LPWSTR labelW, fsnameW;
 877     BOOL ret;
 878
 879     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
 880
 881     labelW = label ? HeapAlloc(GetProcessHeap(), 0, label_len * sizeof(WCHAR)) : NULL;
 882     fsnameW = fsname ? HeapAlloc(GetProcessHeap(), 0, fsname_len * sizeof(WCHAR)) : NULL;
 883
 884     if ((ret = GetVolumeInformationW(rootW, labelW, label_len, serial,
 885                                     filename_len, flags, fsnameW, fsname_len)))
 886     {
 887         if (label) FILE_name_WtoA( labelW, -1, label, label_len );
 888         if (fsname) FILE_name_WtoA( fsnameW, -1, fsname, fsname_len );
 889     }
 890
 891     HeapFree( GetProcessHeap(), 0, labelW );
 892     HeapFree( GetProcessHeap(), 0, fsnameW );
 893     return ret;
 894 }
 895
 896
 897
 898 /***********************************************************************
 899  *           SetVolumeLabelW   (KERNEL32.@)
 900  */
 901 BOOL WINAPI SetVolumeLabelW( LPCWSTR root, LPCWSTR label )
 902 {
 903     WCHAR device[] = {'\\','\\','.','\\','A',':',0};
 904     HANDLE handle;
 905     enum fs_type type = FS_UNKNOWN;
 906
 907     if (!root)
 908     {
 909         WCHAR path[MAX_PATH];
 910         GetCurrentDirectoryW( MAX_PATH, path );
 911         device[4] = path[0];
 912     }
 913     else
 914     {
 915         if (!root[0] || root[1] != ':')
 916         {
 917             SetLastError( ERROR_INVALID_NAME );
 918             return FALSE;
 919         }
 920         device[4] = root[0];
 921     }
 922
 923     /* try to open the device */
 924
 925     handle = CreateFileW( device, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE,
 926                           NULL, OPEN_EXISTING, 0, 0 );
 927     if (handle != INVALID_HANDLE_VALUE)
 928     {
 929         BYTE superblock[SUPERBLOCK_SIZE];
 930
 931         type = VOLUME_ReadFATSuperblock( handle, superblock );
 932         if (type == FS_UNKNOWN) type = VOLUME_ReadCDSuperblock( handle, superblock );
 933         CloseHandle( handle );
 934         if (type != FS_UNKNOWN)
 935         {
 936             /* we can't set the label on FAT or CDROM file systems */
 937             TRACE( "cannot set label on device %s type %d\n", debugstr_w(device), type );
 938             SetLastError( ERROR_ACCESS_DENIED );
 939             return FALSE;
 940         }
 941     }
 942     else
 943     {
 944         TRACE( "cannot open device %s: err %d\n", debugstr_w(device), GetLastError() );
 945         if (GetLastError() == ERROR_ACCESS_DENIED) return FALSE;
 946     }
 947
 948     /* we couldn't open the device, fallback to default strategy */
 949
 950     switch(GetDriveTypeW( root ))
 951     {
 952     case DRIVE_UNKNOWN:
 953     case DRIVE_NO_ROOT_DIR:
 954         SetLastError( ERROR_NOT_READY );
 955         break;
 956     case DRIVE_REMOVABLE:
 957     case DRIVE_FIXED:
 958         {
 959             WCHAR labelW[] = {'A',':','\\','.','w','i','n','d','o','w','s','-','l','a','b','e','l',0};
 960
 961             labelW[0] = device[4];
 962
 963             if (!label[0])  /* delete label file when setting an empty label */
 964                 return DeleteFileW( labelW ) || GetLastError() == ERROR_FILE_NOT_FOUND;
 965
 966             handle = CreateFileW( labelW, GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
 967                                   CREATE_ALWAYS, 0, 0 );
 968             if (handle != INVALID_HANDLE_VALUE)
 969             {
 970                 char buffer[64];
 971                 DWORD size;
 972
 973                 if (!WideCharToMultiByte( CP_UNIXCP, 0, label, -1, buffer, sizeof(buffer)-1, NULL, NULL ))
 974                     buffer[sizeof(buffer)-2] = 0;
 975                 strcat( buffer, "\n" );
 976                 WriteFile( handle, buffer, strlen(buffer), &size, NULL );
 977                 CloseHandle( handle );
 978                 return TRUE;
 979             }
 980             break;
 981         }
 982     case DRIVE_REMOTE:
 983     case DRIVE_RAMDISK:
 984     case DRIVE_CDROM:
 985         SetLastError( ERROR_ACCESS_DENIED );
 986         break;
 987     }
 988     return FALSE;
 989 }
 990
 991 /***********************************************************************
 992  *           SetVolumeLabelA   (KERNEL32.@)
 993  */
 994 BOOL WINAPI SetVolumeLabelA(LPCSTR root, LPCSTR volname)
 995 {
 996     WCHAR *rootW = NULL, *volnameW = NULL;
 997     BOOL ret;
 998
 999     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
1000     if (volname && !(volnameW = FILE_name_AtoW( volname, TRUE ))) return FALSE;
1001     ret = SetVolumeLabelW( rootW, volnameW );
1002     HeapFree( GetProcessHeap(), 0, volnameW );
1003     return ret;
1004 }
1005
1006
1007 /***********************************************************************
1008  *           GetVolumeNameForVolumeMountPointA   (KERNEL32.@)
1009  */
1010 BOOL WINAPI GetVolumeNameForVolumeMountPointA( LPCSTR path, LPSTR volume, DWORD size )
1011 {
1012     BOOL ret;
1013     WCHAR volumeW[50], *pathW = NULL;
1014     DWORD len = min( sizeof(volumeW) / sizeof(WCHAR), size );
1015
1016     TRACE("(%s, %p, %x)\n", debugstr_a(path), volume, size);
1017
1018     if (!path || !(pathW = FILE_name_AtoW( path, TRUE )))
1019         return FALSE;
1020
1021     if ((ret = GetVolumeNameForVolumeMountPointW( pathW, volumeW, len )))
1022         FILE_name_WtoA( volumeW, -1, volume, len );
1023
1024     HeapFree( GetProcessHeap(), 0, pathW );
1025     return ret;
1026 }
1027
1028 /***********************************************************************
1029  *           GetVolumeNameForVolumeMountPointW   (KERNEL32.@)
1030  */
1031 BOOL WINAPI GetVolumeNameForVolumeMountPointW( LPCWSTR path, LPWSTR volume, DWORD size )
1032 {
1033     static const WCHAR prefixW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\',0};
1034     static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{'};
1035     static const WCHAR trailingW[] = {'\\',0};
1036
1037     MOUNTMGR_MOUNT_POINT *input = NULL, *o1;
1038     MOUNTMGR_MOUNT_POINTS *output = NULL;
1039     WCHAR *p;
1040     char *r;
1041     DWORD i, i_size = 1024, o_size = 1024;
1042     WCHAR *nonpersist_name;
1043     WCHAR symlink_name[MAX_PATH];
1044     NTSTATUS status;
1045     HANDLE mgr = INVALID_HANDLE_VALUE;
1046     BOOL ret = FALSE;
1047
1048     TRACE("(%s, %p, %x)\n", debugstr_w(path), volume, size);
1049     if (path[lstrlenW(path)-1] != '\\')
1050     {
1051         SetLastError( ERROR_INVALID_NAME );
1052         return FALSE;
1053     }
1054
1055     if (size < 50)
1056     {
1057         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1058         return FALSE;
1059     }
1060     /* if length of input is > 3 then it must be a mounted folder */
1061     if (lstrlenW(path) > 3)
1062     {
1063         FIXME("Mounted Folders are not yet supported\n");
1064         SetLastError( ERROR_NOT_A_REPARSE_POINT );
1065         return FALSE;
1066     }
1067
1068     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ,
1069                         NULL, OPEN_EXISTING, 0, 0 );
1070     if (mgr == INVALID_HANDLE_VALUE) return FALSE;
1071
1072     if (!(input = HeapAlloc( GetProcessHeap(), 0, i_size )))
1073     {
1074         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1075         goto err_ret;
1076     }
1077
1078     if (!(output = HeapAlloc( GetProcessHeap(), 0, o_size )))
1079     {
1080         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1081         goto err_ret;
1082     }
1083
1084     /* construct the symlink name as "\DosDevices\C:" */
1085     lstrcpyW( symlink_name, prefixW );
1086     lstrcatW( symlink_name, path );
1087     symlink_name[lstrlenW(symlink_name)-1] = 0;
1088
1089     /* Take the mount point and get the "nonpersistent name" */
1090     /* We will then take that and get the volume name        */
1091     nonpersist_name = (WCHAR *)(input + 1);
1092     status = read_nt_symlink( symlink_name, nonpersist_name, i_size - sizeof(*input) );
1093     TRACE("read_nt_symlink got stat=%x, for %s, got <%s>\n", status,
1094             debugstr_w(symlink_name), debugstr_w(nonpersist_name));
1095     if (status != STATUS_SUCCESS)
1096     {
1097         SetLastError( ERROR_FILE_NOT_FOUND );
1098         goto err_ret;
1099     }
1100
1101     /* Now take the "nonpersistent name" and ask the mountmgr  */
1102     /* to give us all the mount points.  One of them will be   */
1103     /* the volume name  (format of \??\Volume{).               */
1104     memset( input, 0, sizeof(*input) );  /* clear all input parameters */
1105     input->DeviceNameOffset = sizeof(*input);
1106     input->DeviceNameLength = lstrlenW( nonpersist_name) * sizeof(WCHAR);
1107     i_size = input->DeviceNameOffset + input->DeviceNameLength;
1108
1109     output->Size = o_size;
1110
1111     /* now get the true volume name from the mountmgr   */
1112     if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, input, i_size,
1113                         output, o_size, NULL, NULL ))
1114         goto err_ret;
1115
1116     /* Verify and return the data, note string is not null terminated  */
1117     TRACE("found %d matching mount points\n", output->NumberOfMountPoints);
1118     if (output->NumberOfMountPoints < 1)
1119     {
1120         SetLastError( ERROR_NO_VOLUME_ID );
1121         goto err_ret;
1122     }
1123     o1 = &output->MountPoints[0];
1124
1125     /* look for the volume name in returned values  */
1126     for(i=0;i<output->NumberOfMountPoints;i++)
1127     {
1128         p = (WCHAR*)((char *)output + o1->SymbolicLinkNameOffset);
1129         r = (char *)output + o1->UniqueIdOffset;
1130         TRACE("found symlink=%s, unique=%s, devname=%s\n",
1131             debugstr_wn(p, o1->SymbolicLinkNameLength/sizeof(WCHAR)),
1132             debugstr_an(r, o1->UniqueIdLength),
1133             debugstr_wn((WCHAR*)((char *)output + o1->DeviceNameOffset),
1134                             o1->DeviceNameLength/sizeof(WCHAR)));
1135
1136         if (!strncmpW( p, volumeW, sizeof(volumeW)/sizeof(WCHAR) ))
1137         {
1138             /* is there space in the return variable ?? */
1139             if ((o1->SymbolicLinkNameLength/sizeof(WCHAR))+2 > size)
1140             {
1141                 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1142                 goto err_ret;
1143             }
1144             memcpy( volume, p, o1->SymbolicLinkNameLength );
1145             volume[o1->SymbolicLinkNameLength / sizeof(WCHAR)] = 0;
1146             lstrcatW( volume, trailingW );
1147             /* change second char from '?' to '\'  */
1148             volume[1] = '\\';
1149             ret = TRUE;
1150             break;
1151         }
1152         o1++;
1153     }
1154
1155 err_ret:
1156     HeapFree( GetProcessHeap(), 0, input );
1157     HeapFree( GetProcessHeap(), 0, output );
1158     CloseHandle( mgr );
1159     return ret;
1160 }
1161
1162 /***********************************************************************
1163  *           DefineDosDeviceW       (KERNEL32.@)
1164  */
1165 BOOL WINAPI DefineDosDeviceW( DWORD flags, LPCWSTR devname, LPCWSTR targetpath )
1166 {
1167     DWORD len, dosdev;
1168     BOOL ret = FALSE;
1169     char *path = NULL, *target, *p;
1170
1171     TRACE("%x, %s, %s\n", flags, debugstr_w(devname), debugstr_w(targetpath));
1172
1173     if (!(flags & DDD_REMOVE_DEFINITION))
1174     {
1175         if (!(flags & DDD_RAW_TARGET_PATH))
1176         {
1177             FIXME( "(0x%08x,%s,%s) DDD_RAW_TARGET_PATH flag not set, not supported yet\n",
1178                    flags, debugstr_w(devname), debugstr_w(targetpath) );
1179             SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1180             return FALSE;
1181         }
1182
1183         len = WideCharToMultiByte( CP_UNIXCP, 0, targetpath, -1, NULL, 0, NULL, NULL );
1184         if ((target = HeapAlloc( GetProcessHeap(), 0, len )))
1185         {
1186             WideCharToMultiByte( CP_UNIXCP, 0, targetpath, -1, target, len, NULL, NULL );
1187             for (p = target; *p; p++) if (*p == '\\') *p = '/';
1188         }
1189         else
1190         {
1191             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1192             return FALSE;
1193         }
1194     }
1195     else target = NULL;
1196
1197     /* first check for a DOS device */
1198
1199     if ((dosdev = RtlIsDosDeviceName_U( devname )))
1200     {
1201         WCHAR name[5];
1202
1203         memcpy( name, devname + HIWORD(dosdev)/sizeof(WCHAR), LOWORD(dosdev) );
1204         name[LOWORD(dosdev)/sizeof(WCHAR)] = 0;
1205         path = get_dos_device_path( name );
1206     }
1207     else if (isalphaW(devname[0]) && devname[1] == ':' && !devname[2])  /* drive mapping */
1208     {
1209         path = get_dos_device_path( devname );
1210     }
1211     else SetLastError( ERROR_FILE_NOT_FOUND );
1212
1213     if (path)
1214     {
1215         if (target)
1216         {
1217             TRACE( "creating symlink %s -> %s\n", path, target );
1218             unlink( path );
1219             if (!symlink( target, path )) ret = TRUE;
1220             else FILE_SetDosError();
1221         }
1222         else
1223         {
1224             TRACE( "removing symlink %s\n", path );
1225             if (!unlink( path )) ret = TRUE;
1226             else FILE_SetDosError();
1227         }
1228         HeapFree( GetProcessHeap(), 0, path );
1229     }
1230     HeapFree( GetProcessHeap(), 0, target );
1231     return ret;
1232 }
1233
1234
1235 /***********************************************************************
1236  *           DefineDosDeviceA       (KERNEL32.@)
1237  */
1238 BOOL WINAPI DefineDosDeviceA(DWORD flags, LPCSTR devname, LPCSTR targetpath)
1239 {
1240     WCHAR *devW, *targetW = NULL;
1241     BOOL ret;
1242
1243     if (!(devW = FILE_name_AtoW( devname, FALSE ))) return FALSE;
1244     if (targetpath && !(targetW = FILE_name_AtoW( targetpath, TRUE ))) return FALSE;
1245     ret = DefineDosDeviceW(flags, devW, targetW);
1246     HeapFree( GetProcessHeap(), 0, targetW );
1247     return ret;
1248 }
1249
1250
1251 /***********************************************************************
1252  *           QueryDosDeviceW   (KERNEL32.@)
1253  *
1254  * returns array of strings terminated by \0, terminated by \0
1255  */
1256 DWORD WINAPI QueryDosDeviceW( LPCWSTR devname, LPWSTR target, DWORD bufsize )
1257 {
1258     static const WCHAR auxW[] = {'A','U','X',0};
1259     static const WCHAR nulW[] = {'N','U','L',0};
1260     static const WCHAR prnW[] = {'P','R','N',0};
1261     static const WCHAR comW[] = {'C','O','M',0};
1262     static const WCHAR lptW[] = {'L','P','T',0};
1263     static const WCHAR com0W[] = {'\\','?','?','\\','C','O','M','0',0};
1264     static const WCHAR com1W[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','C','O','M','1',0,0};
1265     static const WCHAR lpt1W[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','L','P','T','1',0,0};
1266     static const WCHAR dosdevW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\',0};
1267
1268     UNICODE_STRING nt_name;
1269     ANSI_STRING unix_name;
1270     WCHAR nt_buffer[10];
1271     NTSTATUS status;
1272
1273     if (!bufsize)
1274     {
1275         SetLastError( ERROR_INSUFFICIENT_BUFFER );
1276         return 0;
1277     }
1278
1279     if (devname)
1280     {
1281         WCHAR *p, name[5];
1282         char *path, *link;
1283         DWORD dosdev, ret = 0;
1284
1285         if ((dosdev = RtlIsDosDeviceName_U( devname )))
1286         {
1287             memcpy( name, devname + HIWORD(dosdev)/sizeof(WCHAR), LOWORD(dosdev) );
1288             name[LOWORD(dosdev)/sizeof(WCHAR)] = 0;
1289         }
1290         else
1291         {
1292             WCHAR *buffer;
1293
1294             if (!(buffer = HeapAlloc( GetProcessHeap(), 0, sizeof(dosdevW) + strlenW(devname)*sizeof(WCHAR) )))
1295             {
1296                 SetLastError( ERROR_OUTOFMEMORY );
1297                 return 0;
1298             }
1299             memcpy( buffer, dosdevW, sizeof(dosdevW) );
1300             strcatW( buffer, devname );
1301             status = read_nt_symlink( buffer, target, bufsize );
1302             HeapFree( GetProcessHeap(), 0, buffer );
1303             if (status)
1304             {
1305                 SetLastError( RtlNtStatusToDosError(status) );
1306                 return 0;
1307             }
1308             ret = strlenW( target ) + 1;
1309             goto done;
1310         }
1311
1312         /* FIXME: should read NT symlink for all devices */
1313
1314         if (!(path = get_dos_device_path( name ))) return 0;
1315         link = read_symlink( path );
1316         HeapFree( GetProcessHeap(), 0, path );
1317
1318         if (link)
1319         {
1320             ret = MultiByteToWideChar( CP_UNIXCP, 0, link, -1, target, bufsize );
1321             HeapFree( GetProcessHeap(), 0, link );
1322         }
1323         else if (dosdev)  /* look for device defaults */
1324         {
1325             if (!strcmpiW( name, auxW ))
1326             {
1327                 if (bufsize >= sizeof(com1W)/sizeof(WCHAR))
1328                 {
1329                     memcpy( target, com1W, sizeof(com1W) );
1330                     ret = sizeof(com1W)/sizeof(WCHAR);
1331                 }
1332                 else SetLastError( ERROR_INSUFFICIENT_BUFFER );
1333                 return ret;
1334             }
1335             if (!strcmpiW( name, prnW ))
1336             {
1337                 if (bufsize >= sizeof(lpt1W)/sizeof(WCHAR))
1338                 {
1339                     memcpy( target, lpt1W, sizeof(lpt1W) );
1340                     ret = sizeof(lpt1W)/sizeof(WCHAR);
1341                 }
1342                 else SetLastError( ERROR_INSUFFICIENT_BUFFER );
1343                 return ret;
1344             }
1345
1346             nt_buffer[0] = '\\';
1347             nt_buffer[1] = '?';
1348             nt_buffer[2] = '?';
1349             nt_buffer[3] = '\\';
1350             strcpyW( nt_buffer + 4, name );
1351             RtlInitUnicodeString( &nt_name, nt_buffer );
1352             status = wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, TRUE );
1353             if (status) SetLastError( RtlNtStatusToDosError(status) );
1354             else
1355             {
1356                 ret = MultiByteToWideChar( CP_UNIXCP, 0, unix_name.Buffer, -1, target, bufsize );
1357                 RtlFreeAnsiString( &unix_name );
1358             }
1359         }
1360     done:
1361         if (ret)
1362         {
1363             if (ret < bufsize) target[ret++] = 0;  /* add an extra null */
1364             for (p = target; *p; p++) if (*p == '/') *p = '\\';
1365         }
1366
1367         return ret;
1368     }
1369     else  /* return a list of all devices */
1370     {
1371         OBJECT_ATTRIBUTES attr;
1372         HANDLE handle;
1373         WCHAR *p = target;
1374         int i;
1375
1376         if (bufsize <= (sizeof(auxW)+sizeof(nulW)+sizeof(prnW))/sizeof(WCHAR))
1377         {
1378             SetLastError( ERROR_INSUFFICIENT_BUFFER );
1379             return 0;
1380         }
1381
1382         /* FIXME: these should be NT symlinks too */
1383
1384         memcpy( p, auxW, sizeof(auxW) );
1385         p += sizeof(auxW) / sizeof(WCHAR);
1386         memcpy( p, nulW, sizeof(nulW) );
1387         p += sizeof(nulW) / sizeof(WCHAR);
1388         memcpy( p, prnW, sizeof(prnW) );
1389         p += sizeof(prnW) / sizeof(WCHAR);
1390
1391         strcpyW( nt_buffer, com0W );
1392         RtlInitUnicodeString( &nt_name, nt_buffer );
1393
1394         for (i = 1; i <= 9; i++)
1395         {
1396             nt_buffer[7] = '0' + i;
1397             if (!wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, TRUE ))
1398             {
1399                 RtlFreeAnsiString( &unix_name );
1400                 if (p + 5 >= target + bufsize)
1401                 {
1402                     SetLastError( ERROR_INSUFFICIENT_BUFFER );
1403                     return 0;
1404                 }
1405                 strcpyW( p, comW );
1406                 p[3] = '0' + i;
1407                 p[4] = 0;
1408                 p += 5;
1409             }
1410         }
1411         strcpyW( nt_buffer + 4, lptW );
1412         for (i = 1; i <= 9; i++)
1413         {
1414             nt_buffer[7] = '0' + i;
1415             if (!wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, TRUE ))
1416             {
1417                 RtlFreeAnsiString( &unix_name );
1418                 if (p + 5 >= target + bufsize)
1419                 {
1420                     SetLastError( ERROR_INSUFFICIENT_BUFFER );
1421                     return 0;
1422                 }
1423                 strcpyW( p, lptW );
1424                 p[3] = '0' + i;
1425                 p[4] = 0;
1426                 p += 5;
1427             }
1428         }
1429
1430         RtlInitUnicodeString( &nt_name, dosdevW );
1431         nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
1432         attr.Length = sizeof(attr);
1433         attr.RootDirectory = 0;
1434         attr.ObjectName = &nt_name;
1435         attr.Attributes = OBJ_CASE_INSENSITIVE;
1436         attr.SecurityDescriptor = NULL;
1437         attr.SecurityQualityOfService = NULL;
1438         status = NtOpenDirectoryObject( &handle, FILE_LIST_DIRECTORY, &attr );
1439         if (!status)
1440         {
1441             char data[1024];
1442             DIRECTORY_BASIC_INFORMATION *info = (DIRECTORY_BASIC_INFORMATION *)data;
1443             ULONG ctx = 0, len;
1444
1445             while (!NtQueryDirectoryObject( handle, info, sizeof(data), 1, 0, &ctx, &len ))
1446             {
1447                 if (p + info->ObjectName.Length/sizeof(WCHAR) + 1 >= target + bufsize)
1448                 {
1449                     SetLastError( ERROR_INSUFFICIENT_BUFFER );
1450                     NtClose( handle );
1451                     return 0;
1452                 }
1453                 memcpy( p, info->ObjectName.Buffer, info->ObjectName.Length );
1454                 p += info->ObjectName.Length/sizeof(WCHAR);
1455                 *p++ = 0;
1456             }
1457             NtClose( handle );
1458         }
1459
1460         *p++ = 0;  /* terminating null */
1461         return p - target;
1462     }
1463 }
1464
1465
1466 /***********************************************************************
1467  *           QueryDosDeviceA   (KERNEL32.@)
1468  *
1469  * returns array of strings terminated by \0, terminated by \0
1470  */
1471 DWORD WINAPI QueryDosDeviceA( LPCSTR devname, LPSTR target, DWORD bufsize )
1472 {
1473     DWORD ret = 0, retW;
1474     WCHAR *devnameW = NULL;
1475     LPWSTR targetW;
1476
1477     if (devname && !(devnameW = FILE_name_AtoW( devname, FALSE ))) return 0;
1478
1479     targetW = HeapAlloc( GetProcessHeap(),0, bufsize * sizeof(WCHAR) );
1480     if (!targetW)
1481     {
1482         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1483         return 0;
1484     }
1485
1486     retW = QueryDosDeviceW(devnameW, targetW, bufsize);
1487
1488     ret = FILE_name_WtoA( targetW, retW, target, bufsize );
1489
1490     HeapFree(GetProcessHeap(), 0, targetW);
1491     return ret;
1492 }
1493
1494
1495 /***********************************************************************
1496  *           GetLogicalDrives   (KERNEL32.@)
1497  */
1498 DWORD WINAPI GetLogicalDrives(void)
1499 {
1500     static const WCHAR dosdevW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\',0};
1501     OBJECT_ATTRIBUTES attr;
1502     UNICODE_STRING nt_name;
1503     DWORD bitmask = 0;
1504     NTSTATUS status;
1505     HANDLE handle;
1506
1507     RtlInitUnicodeString( &nt_name, dosdevW );
1508     nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
1509     attr.Length = sizeof(attr);
1510     attr.RootDirectory = 0;
1511     attr.ObjectName = &nt_name;
1512     attr.Attributes = OBJ_CASE_INSENSITIVE;
1513     attr.SecurityDescriptor = NULL;
1514     attr.SecurityQualityOfService = NULL;
1515     status = NtOpenDirectoryObject( &handle, FILE_LIST_DIRECTORY, &attr );
1516     if (!status)
1517     {
1518         char data[1024];
1519         DIRECTORY_BASIC_INFORMATION *info = (DIRECTORY_BASIC_INFORMATION *)data;
1520         ULONG ctx = 0, len;
1521
1522         while (!NtQueryDirectoryObject( handle, info, sizeof(data), 1, 0, &ctx, &len ))
1523             if(info->ObjectName.Length == 2*sizeof(WCHAR) && info->ObjectName.Buffer[1] == ':')
1524                 bitmask |= 1 << (info->ObjectName.Buffer[0] - 'A');
1525
1526         NtClose( handle );
1527     }
1528
1529     return bitmask;
1530 }
1531
1532
1533 /***********************************************************************
1534  *           GetLogicalDriveStringsA   (KERNEL32.@)
1535  */
1536 UINT WINAPI GetLogicalDriveStringsA( UINT len, LPSTR buffer )
1537 {
1538     DWORD drives = GetLogicalDrives();
1539     UINT drive, count;
1540
1541     for (drive = count = 0; drive < 26; drive++) if (drives & (1 << drive)) count++;
1542     if ((count * 4) + 1 > len) return count * 4 + 1;
1543
1544     for (drive = 0; drive < 26; drive++)
1545     {
1546         if (drives & (1 << drive))
1547         {
1548             *buffer++ = 'A' + drive;
1549             *buffer++ = ':';
1550             *buffer++ = '\\';
1551             *buffer++ = 0;
1552         }
1553     }
1554     *buffer = 0;
1555     return count * 4;
1556 }
1557
1558
1559 /***********************************************************************
1560  *           GetLogicalDriveStringsW   (KERNEL32.@)
1561  */
1562 UINT WINAPI GetLogicalDriveStringsW( UINT len, LPWSTR buffer )
1563 {
1564     DWORD drives = GetLogicalDrives();
1565     UINT drive, count;
1566
1567     for (drive = count = 0; drive < 26; drive++) if (drives & (1 << drive)) count++;
1568     if ((count * 4) + 1 > len) return count * 4 + 1;
1569
1570     for (drive = 0; drive < 26; drive++)
1571     {
1572         if (drives & (1 << drive))
1573         {
1574             *buffer++ = 'A' + drive;
1575             *buffer++ = ':';
1576             *buffer++ = '\\';
1577             *buffer++ = 0;
1578         }
1579     }
1580     *buffer = 0;
1581     return count * 4;
1582 }
1583
1584
1585 /***********************************************************************
1586  *           GetDriveTypeW   (KERNEL32.@)
1587  *
1588  * Returns the type of the disk drive specified. If root is NULL the
1589  * root of the current directory is used.
1590  *
1591  * RETURNS
1592  *
1593  *  Type of drive (from Win32 SDK):
1594  *
1595  *   DRIVE_UNKNOWN     unable to find out anything about the drive
1596  *   DRIVE_NO_ROOT_DIR nonexistent root dir
1597  *   DRIVE_REMOVABLE   the disk can be removed from the machine
1598  *   DRIVE_FIXED       the disk cannot be removed from the machine
1599  *   DRIVE_REMOTE      network disk
1600  *   DRIVE_CDROM       CDROM drive
1601  *   DRIVE_RAMDISK     virtual disk in RAM
1602  */
1603 UINT WINAPI GetDriveTypeW(LPCWSTR root) /* [in] String describing drive */
1604 {
1605     FILE_FS_DEVICE_INFORMATION info;
1606     IO_STATUS_BLOCK io;
1607     NTSTATUS status;
1608     HANDLE handle;
1609     UINT ret;
1610
1611     if (!open_device_root( root, &handle )) return DRIVE_NO_ROOT_DIR;
1612
1613     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsDeviceInformation );
1614     NtClose( handle );
1615     if (status != STATUS_SUCCESS)
1616     {
1617         SetLastError( RtlNtStatusToDosError(status) );
1618         ret = DRIVE_UNKNOWN;
1619     }
1620     else
1621     {
1622         switch (info.DeviceType)
1623         {
1624         case FILE_DEVICE_CD_ROM_FILE_SYSTEM:  ret = DRIVE_CDROM; break;
1625         case FILE_DEVICE_VIRTUAL_DISK:        ret = DRIVE_RAMDISK; break;
1626         case FILE_DEVICE_NETWORK_FILE_SYSTEM: ret = DRIVE_REMOTE; break;
1627         case FILE_DEVICE_DISK_FILE_SYSTEM:
1628             if (info.Characteristics & FILE_REMOTE_DEVICE) ret = DRIVE_REMOTE;
1629             else if (info.Characteristics & FILE_REMOVABLE_MEDIA) ret = DRIVE_REMOVABLE;
1630             else if ((ret = get_mountmgr_drive_type( root )) == DRIVE_UNKNOWN) ret = DRIVE_FIXED;
1631             break;
1632         default:
1633             ret = DRIVE_UNKNOWN;
1634             break;
1635         }
1636     }
1637     TRACE( "%s -> %d\n", debugstr_w(root), ret );
1638     return ret;
1639 }
1640
1641
1642 /***********************************************************************
1643  *           GetDriveTypeA   (KERNEL32.@)
1644  *
1645  * See GetDriveTypeW.
1646  */
1647 UINT WINAPI GetDriveTypeA( LPCSTR root )
1648 {
1649     WCHAR *rootW = NULL;
1650
1651     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return DRIVE_NO_ROOT_DIR;
1652     return GetDriveTypeW( rootW );
1653 }
1654
1655
1656 /***********************************************************************
1657  *           GetDiskFreeSpaceExW   (KERNEL32.@)
1658  *
1659  *  This function is used to acquire the size of the available and
1660  *  total space on a logical volume.
1661  *
1662  * RETURNS
1663  *
1664  *  Zero on failure, nonzero upon success. Use GetLastError to obtain
1665  *  detailed error information.
1666  *
1667  */
1668 BOOL WINAPI GetDiskFreeSpaceExW( LPCWSTR root, PULARGE_INTEGER avail,
1669                                  PULARGE_INTEGER total, PULARGE_INTEGER totalfree )
1670 {
1671     FILE_FS_SIZE_INFORMATION info;
1672     IO_STATUS_BLOCK io;
1673     NTSTATUS status;
1674     HANDLE handle;
1675     UINT units;
1676
1677     TRACE( "%s,%p,%p,%p\n", debugstr_w(root), avail, total, totalfree );
1678
1679     if (!open_device_root( root, &handle )) return FALSE;
1680
1681     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsSizeInformation );
1682     NtClose( handle );
1683     if (status != STATUS_SUCCESS)
1684     {
1685         SetLastError( RtlNtStatusToDosError(status) );
1686         return FALSE;
1687     }
1688
1689     units = info.SectorsPerAllocationUnit * info.BytesPerSector;
1690     if (total) total->QuadPart = info.TotalAllocationUnits.QuadPart * units;
1691     if (totalfree) totalfree->QuadPart = info.AvailableAllocationUnits.QuadPart * units;
1692     /* FIXME: this one should take quotas into account */
1693     if (avail) avail->QuadPart = info.AvailableAllocationUnits.QuadPart * units;
1694     return TRUE;
1695 }
1696
1697
1698 /***********************************************************************
1699  *           GetDiskFreeSpaceExA   (KERNEL32.@)
1700  *
1701  * See GetDiskFreeSpaceExW.
1702  */
1703 BOOL WINAPI GetDiskFreeSpaceExA( LPCSTR root, PULARGE_INTEGER avail,
1704                                  PULARGE_INTEGER total, PULARGE_INTEGER totalfree )
1705 {
1706     WCHAR *rootW = NULL;
1707
1708     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
1709     return GetDiskFreeSpaceExW( rootW, avail, total, totalfree );
1710 }
1711
1712
1713 /***********************************************************************
1714  *           GetDiskFreeSpaceW   (KERNEL32.@)
1715  */
1716 BOOL WINAPI GetDiskFreeSpaceW( LPCWSTR root, LPDWORD cluster_sectors,
1717                                LPDWORD sector_bytes, LPDWORD free_clusters,
1718                                LPDWORD total_clusters )
1719 {
1720     FILE_FS_SIZE_INFORMATION info;
1721     IO_STATUS_BLOCK io;
1722     NTSTATUS status;
1723     HANDLE handle;
1724     UINT units;
1725
1726     TRACE( "%s,%p,%p,%p,%p\n", debugstr_w(root),
1727            cluster_sectors, sector_bytes, free_clusters, total_clusters );
1728
1729     if (!open_device_root( root, &handle )) return FALSE;
1730
1731     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsSizeInformation );
1732     NtClose( handle );
1733     if (status != STATUS_SUCCESS)
1734     {
1735         SetLastError( RtlNtStatusToDosError(status) );
1736         return FALSE;
1737     }
1738
1739     units = info.SectorsPerAllocationUnit * info.BytesPerSector;
1740
1741     if( GetVersion() & 0x80000000) {    /* win3.x, 9x, ME */
1742         /* cap the size and available at 2GB as per specs */
1743         if (info.TotalAllocationUnits.QuadPart * units > 0x7fffffff) {
1744             info.TotalAllocationUnits.QuadPart = 0x7fffffff / units;
1745             if (info.AvailableAllocationUnits.QuadPart * units > 0x7fffffff)
1746                 info.AvailableAllocationUnits.QuadPart = 0x7fffffff / units;
1747         }
1748         /* nr. of clusters is always <= 65335 */
1749         while( info.TotalAllocationUnits.QuadPart > 65535 ) {
1750             info.TotalAllocationUnits.QuadPart /= 2;
1751             info.AvailableAllocationUnits.QuadPart /= 2;
1752             info.SectorsPerAllocationUnit *= 2;
1753         }
1754     }
1755
1756     if (cluster_sectors) *cluster_sectors = info.SectorsPerAllocationUnit;
1757     if (sector_bytes) *sector_bytes = info.BytesPerSector;
1758     if (free_clusters) *free_clusters = info.AvailableAllocationUnits.u.LowPart;
1759     if (total_clusters) *total_clusters = info.TotalAllocationUnits.u.LowPart;
1760     TRACE("%#08x, %#08x, %#08x, %#08x\n", info.SectorsPerAllocationUnit, info.BytesPerSector,
1761           info.AvailableAllocationUnits.u.LowPart, info.TotalAllocationUnits.u.LowPart);
1762     return TRUE;
1763 }
1764
1765
1766 /***********************************************************************
1767  *           GetDiskFreeSpaceA   (KERNEL32.@)
1768  */
1769 BOOL WINAPI GetDiskFreeSpaceA( LPCSTR root, LPDWORD cluster_sectors,
1770                                LPDWORD sector_bytes, LPDWORD free_clusters,
1771                                LPDWORD total_clusters )
1772 {
1773     WCHAR *rootW = NULL;
1774
1775     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
1776     return GetDiskFreeSpaceW( rootW, cluster_sectors, sector_bytes, free_clusters, total_clusters );
1777 }
1778
1779 /***********************************************************************
1780  *           GetVolumePathNameA   (KERNEL32.@)
1781  */
1782 BOOL WINAPI GetVolumePathNameA(LPCSTR filename, LPSTR volumepathname, DWORD buflen)
1783 {
1784     BOOL ret;
1785     WCHAR *filenameW = NULL, *volumeW = NULL;
1786
1787     FIXME("(%s, %p, %d), stub!\n", debugstr_a(filename), volumepathname, buflen);
1788
1789     if (filename && !(filenameW = FILE_name_AtoW( filename, FALSE )))
1790         return FALSE;
1791     if (volumepathname && !(volumeW = HeapAlloc( GetProcessHeap(), 0, buflen * sizeof(WCHAR) )))
1792         return FALSE;
1793
1794     if ((ret = GetVolumePathNameW( filenameW, volumeW, buflen )))
1795         FILE_name_WtoA( volumeW, -1, volumepathname, buflen );
1796
1797     HeapFree( GetProcessHeap(), 0, volumeW );
1798     return ret;
1799 }
1800
1801 /***********************************************************************
1802  *           GetVolumePathNameW   (KERNEL32.@)
1803  */
1804 BOOL WINAPI GetVolumePathNameW(LPCWSTR filename, LPWSTR volumepathname, DWORD buflen)
1805 {
1806     const WCHAR *p = filename;
1807
1808     FIXME("(%s, %p, %d), stub!\n", debugstr_w(filename), volumepathname, buflen);
1809
1810     if (!filename || !volumepathname || !buflen)
1811     {
1812         SetLastError(ERROR_INVALID_PARAMETER);
1813         return FALSE;
1814     }
1815
1816     if (p && tolowerW(p[0]) >= 'a' && tolowerW(p[0]) <= 'z' && p[1] ==':' && p[2] == '\\')
1817     {
1818         if (buflen < 4)
1819         {
1820             SetLastError(ERROR_FILENAME_EXCED_RANGE);
1821             return FALSE;
1822         }
1823         volumepathname[0] = p[0];
1824         volumepathname[1] = ':';
1825         volumepathname[2] = '\\';
1826         volumepathname[3] = 0;
1827         return TRUE;
1828     }
1829
1830     SetLastError(ERROR_INVALID_NAME);
1831     return FALSE;
1832 }
1833
1834 /***********************************************************************
1835  *           GetVolumePathNamesForVolumeNameA   (KERNEL32.@)
1836  */
1837 BOOL WINAPI GetVolumePathNamesForVolumeNameA(LPCSTR volumename, LPSTR volumepathname, DWORD buflen, PDWORD returnlen)
1838 {
1839     BOOL ret;
1840     WCHAR *volumenameW = NULL, *volumepathnameW;
1841
1842     if (volumename && !(volumenameW = FILE_name_AtoW( volumename, TRUE ))) return FALSE;
1843     if (!(volumepathnameW = HeapAlloc( GetProcessHeap(), 0, buflen * sizeof(WCHAR) )))
1844     {
1845         HeapFree( GetProcessHeap(), 0, volumenameW );
1846         return FALSE;
1847     }
1848     if ((ret = GetVolumePathNamesForVolumeNameW( volumenameW, volumepathnameW, buflen, returnlen )))
1849     {
1850         char *path = volumepathname;
1851         const WCHAR *pathW = volumepathnameW;
1852
1853         while (*pathW)
1854         {
1855             int len = strlenW( pathW ) + 1;
1856             FILE_name_WtoA( pathW, len, path, buflen );
1857             buflen -= len;
1858             pathW += len;
1859             path += len;
1860         }
1861         path[0] = 0;
1862     }
1863     HeapFree( GetProcessHeap(), 0, volumenameW );
1864     HeapFree( GetProcessHeap(), 0, volumepathnameW );
1865     return ret;
1866 }
1867
1868 static MOUNTMGR_MOUNT_POINTS *query_mount_points( HANDLE mgr, MOUNTMGR_MOUNT_POINT *input, DWORD insize )
1869 {
1870     MOUNTMGR_MOUNT_POINTS *output;
1871     DWORD outsize = 1024;
1872
1873     for (;;)
1874     {
1875         if (!(output = HeapAlloc( GetProcessHeap(), 0, outsize )))
1876         {
1877             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1878             return NULL;
1879         }
1880         if (DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, input, insize, output, outsize, NULL, NULL )) break;
1881         outsize = output->Size;
1882         HeapFree( GetProcessHeap(), 0, output );
1883         if (GetLastError() != ERROR_MORE_DATA) return NULL;
1884     }
1885     return output;
1886 }
1887 /***********************************************************************
1888  *           GetVolumePathNamesForVolumeNameW   (KERNEL32.@)
1889  */
1890 BOOL WINAPI GetVolumePathNamesForVolumeNameW(LPCWSTR volumename, LPWSTR volumepathname, DWORD buflen, PDWORD returnlen)
1891 {
1892     static const WCHAR dosdevicesW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\'};
1893     HANDLE mgr;
1894     DWORD len, size;
1895     MOUNTMGR_MOUNT_POINT *spec;
1896     MOUNTMGR_MOUNT_POINTS *link, *target = NULL;
1897     WCHAR *name, *path;
1898     BOOL ret = FALSE;
1899     UINT i, j;
1900
1901     TRACE("%s, %p, %u, %p\n", debugstr_w(volumename), volumepathname, buflen, returnlen);
1902
1903     if (!volumename || (len = strlenW( volumename )) != 49)
1904     {
1905         SetLastError( ERROR_INVALID_NAME );
1906         return FALSE;
1907     }
1908     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
1909     if (mgr == INVALID_HANDLE_VALUE) return FALSE;
1910
1911     size = sizeof(*spec) + sizeof(WCHAR) * (len - 1); /* remove trailing backslash */
1912     if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
1913     spec->SymbolicLinkNameOffset = sizeof(*spec);
1914     spec->SymbolicLinkNameLength = size - sizeof(*spec);
1915     name = (WCHAR *)((char *)spec + spec->SymbolicLinkNameOffset);
1916     memcpy( name, volumename, size - sizeof(*spec) );
1917     name[1] = '?'; /* map \\?\ to \??\ */
1918
1919     target = query_mount_points( mgr, spec, size );
1920     HeapFree( GetProcessHeap(), 0, spec );
1921     if (!target)
1922     {
1923         goto done;
1924     }
1925     if (!target->NumberOfMountPoints)
1926     {
1927         SetLastError( ERROR_FILE_NOT_FOUND );
1928         goto done;
1929     }
1930     len = 0;
1931     path = volumepathname;
1932     for (i = 0; i < target->NumberOfMountPoints; i++)
1933     {
1934         link = NULL;
1935         if (target->MountPoints[i].DeviceNameOffset)
1936         {
1937             const WCHAR *device = (const WCHAR *)((const char *)target + target->MountPoints[i].DeviceNameOffset);
1938             USHORT device_len = target->MountPoints[i].DeviceNameLength;
1939
1940             size = sizeof(*spec) + device_len;
1941             if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
1942             spec->DeviceNameOffset = sizeof(*spec);
1943             spec->DeviceNameLength = device_len;
1944             memcpy( (char *)spec + spec->DeviceNameOffset, device, device_len );
1945
1946             link = query_mount_points( mgr, spec, size );
1947             HeapFree( GetProcessHeap(), 0, spec );
1948         }
1949         else if (target->MountPoints[i].UniqueIdOffset)
1950         {
1951             const WCHAR *id = (const WCHAR *)((const char *)target + target->MountPoints[i].UniqueIdOffset);
1952             USHORT id_len = target->MountPoints[i].UniqueIdLength;
1953
1954             size = sizeof(*spec) + id_len;
1955             if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
1956             spec->UniqueIdOffset = sizeof(*spec);
1957             spec->UniqueIdLength = id_len;
1958             memcpy( (char *)spec + spec->UniqueIdOffset, id, id_len );
1959
1960             link = query_mount_points( mgr, spec, size );
1961             HeapFree( GetProcessHeap(), 0, spec );
1962         }
1963         if (!link) continue;
1964         for (j = 0; j < link->NumberOfMountPoints; j++)
1965         {
1966             const WCHAR *linkname;
1967
1968             if (!link->MountPoints[j].SymbolicLinkNameOffset) continue;
1969             linkname = (const WCHAR *)((const char *)link + link->MountPoints[j].SymbolicLinkNameOffset);
1970
1971             if (link->MountPoints[j].SymbolicLinkNameLength == sizeof(dosdevicesW) + 2 * sizeof(WCHAR) &&
1972                 !memicmpW( linkname, dosdevicesW, sizeof(dosdevicesW) / sizeof(WCHAR) ))
1973             {
1974                 len += 4;
1975                 if (volumepathname && len < buflen)
1976                 {
1977                     path[0] = linkname[sizeof(dosdevicesW) / sizeof(WCHAR)];
1978                     path[1] = ':';
1979                     path[2] = '\\';
1980                     path[3] = 0;
1981                     path += 4;
1982                 }
1983             }
1984         }
1985         HeapFree( GetProcessHeap(), 0, link );
1986     }
1987     if (buflen <= len) SetLastError( ERROR_MORE_DATA );
1988     else if (volumepathname)
1989     {
1990         volumepathname[len] = 0;
1991         ret = TRUE;
1992     }
1993     if (returnlen) *returnlen = len + 1;
1994
1995 done:
1996     HeapFree( GetProcessHeap(), 0, target );
1997     CloseHandle( mgr );
1998     return ret;
1999 }
2000
2001 /***********************************************************************
2002  *           FindFirstVolumeA   (KERNEL32.@)
2003  */
2004 HANDLE WINAPI FindFirstVolumeA(LPSTR volume, DWORD len)
2005 {
2006     WCHAR *buffer = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
2007     HANDLE handle = FindFirstVolumeW( buffer, len );
2008
2009     if (handle != INVALID_HANDLE_VALUE)
2010     {
2011         if (!WideCharToMultiByte( CP_ACP, 0, buffer, -1, volume, len, NULL, NULL ))
2012         {
2013             FindVolumeClose( handle );
2014             handle = INVALID_HANDLE_VALUE;
2015         }
2016     }
2017     HeapFree( GetProcessHeap(), 0, buffer );
2018     return handle;
2019 }
2020
2021 /***********************************************************************
2022  *           FindFirstVolumeW   (KERNEL32.@)
2023  */
2024 HANDLE WINAPI FindFirstVolumeW( LPWSTR volume, DWORD len )
2025 {
2026     DWORD size = 1024;
2027     HANDLE mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE,
2028                               NULL, OPEN_EXISTING, 0, 0 );
2029     if (mgr == INVALID_HANDLE_VALUE) return INVALID_HANDLE_VALUE;
2030
2031     for (;;)
2032     {
2033         MOUNTMGR_MOUNT_POINT input;
2034         MOUNTMGR_MOUNT_POINTS *output;
2035
2036         if (!(output = HeapAlloc( GetProcessHeap(), 0, size )))
2037         {
2038             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
2039             break;
2040         }
2041         memset( &input, 0, sizeof(input) );
2042
2043         if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, &input, sizeof(input),
2044                               output, size, NULL, NULL ))
2045         {
2046             if (GetLastError() != ERROR_MORE_DATA) break;
2047             size = output->Size;
2048             HeapFree( GetProcessHeap(), 0, output );
2049             continue;
2050         }
2051         CloseHandle( mgr );
2052         /* abuse the Size field to store the current index */
2053         output->Size = 0;
2054         if (!FindNextVolumeW( output, volume, len ))
2055         {
2056             HeapFree( GetProcessHeap(), 0, output );
2057             return INVALID_HANDLE_VALUE;
2058         }
2059         return output;
2060     }
2061     CloseHandle( mgr );
2062     return INVALID_HANDLE_VALUE;
2063 }
2064
2065 /***********************************************************************
2066  *           FindNextVolumeA   (KERNEL32.@)
2067  */
2068 BOOL WINAPI FindNextVolumeA( HANDLE handle, LPSTR volume, DWORD len )
2069 {
2070     WCHAR *buffer = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
2071     BOOL ret;
2072
2073     if ((ret = FindNextVolumeW( handle, buffer, len )))
2074     {
2075         if (!WideCharToMultiByte( CP_ACP, 0, buffer, -1, volume, len, NULL, NULL )) ret = FALSE;
2076     }
2077     HeapFree( GetProcessHeap(), 0, buffer );
2078     return ret;
2079 }
2080
2081 /***********************************************************************
2082  *           FindNextVolumeW   (KERNEL32.@)
2083  */
2084 BOOL WINAPI FindNextVolumeW( HANDLE handle, LPWSTR volume, DWORD len )
2085 {
2086     MOUNTMGR_MOUNT_POINTS *data = handle;
2087
2088     while (data->Size < data->NumberOfMountPoints)
2089     {
2090         static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{',};
2091         WCHAR *link = (WCHAR *)((char *)data + data->MountPoints[data->Size].SymbolicLinkNameOffset);
2092         DWORD size = data->MountPoints[data->Size].SymbolicLinkNameLength;
2093         data->Size++;
2094         /* skip non-volumes */
2095         if (size < sizeof(volumeW) || memcmp( link, volumeW, sizeof(volumeW) )) continue;
2096         if (size + sizeof(WCHAR) >= len * sizeof(WCHAR))
2097         {
2098             SetLastError( ERROR_FILENAME_EXCED_RANGE );
2099             return FALSE;
2100         }
2101         memcpy( volume, link, size );
2102         volume[1] = '\\';  /* map \??\ to \\?\ */
2103         volume[size / sizeof(WCHAR)] = '\\';  /* Windows appends a backslash */
2104         volume[size / sizeof(WCHAR) + 1] = 0;
2105         TRACE( "returning entry %u %s\n", data->Size - 1, debugstr_w(volume) );
2106         return TRUE;
2107     }
2108     SetLastError( ERROR_NO_MORE_FILES );
2109     return FALSE;
2110 }
2111
2112 /***********************************************************************
2113  *           FindVolumeClose   (KERNEL32.@)
2114  */
2115 BOOL WINAPI FindVolumeClose(HANDLE handle)
2116 {
2117     return HeapFree( GetProcessHeap(), 0, handle );
2118 }
2119
2120 /***********************************************************************
2121  *           FindFirstVolumeMountPointA   (KERNEL32.@)
2122  */
2123 HANDLE WINAPI FindFirstVolumeMountPointA(LPCSTR root, LPSTR mount_point, DWORD len)
2124 {
2125     FIXME("(%s, %p, %d), stub!\n", debugstr_a(root), mount_point, len);
2126     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2127     return INVALID_HANDLE_VALUE;
2128 }
2129
2130 /***********************************************************************
2131  *           FindFirstVolumeMountPointW   (KERNEL32.@)
2132  */
2133 HANDLE WINAPI FindFirstVolumeMountPointW(LPCWSTR root, LPWSTR mount_point, DWORD len)
2134 {
2135     FIXME("(%s, %p, %d), stub!\n", debugstr_w(root), mount_point, len);
2136     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2137     return INVALID_HANDLE_VALUE;
2138 }
2139
2140 /***********************************************************************
2141  *           FindVolumeMountPointClose   (KERNEL32.@)
2142  */
2143 BOOL WINAPI FindVolumeMountPointClose(HANDLE h)
2144 {
2145     FIXME("(%p), stub!\n", h);
2146     return FALSE;
2147 }
2148
2149 /***********************************************************************
2150  *           DeleteVolumeMountPointA   (KERNEL32.@)
2151  */
2152 BOOL WINAPI DeleteVolumeMountPointA(LPCSTR mountpoint)
2153 {
2154     FIXME("(%s), stub!\n", debugstr_a(mountpoint));
2155     return FALSE;
2156 }
2157
2158 /***********************************************************************
2159  *           DeleteVolumeMountPointW (KERNEL32.@)
2160  */
2161 BOOL WINAPI DeleteVolumeMountPointW(LPCWSTR mountpoint)
2162 {
2163     FIXME("(%s), stub!\n", debugstr_w(mountpoint));
2164     return FALSE;
2165 }