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 /* get the path of a dos device symlink in the $WINEPREFIX/dosdevices directory */
  72 static char *get_dos_device_path( LPCWSTR name )
  73 {
  74     const char *config_dir = wine_get_config_dir();
  75     char *buffer, *dev;
  76     int i;
  77
  78     if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
  79                               strlen(config_dir) + sizeof("/dosdevices/") + 5 )))
  80     {
  81         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
  82         return NULL;
  83     }
  84     strcpy( buffer, config_dir );
  85     strcat( buffer, "/dosdevices/" );
  86     dev = buffer + strlen(buffer);
  87     /* no codepage conversion, DOS device names are ASCII anyway */
  88     for (i = 0; i < 5; i++)
  89         if (!(dev[i] = (char)tolowerW(name[i]))) break;
  90     dev[5] = 0;
  91     return buffer;
  92 }
  93
  94 /* read the contents of an NT symlink object */
  95 static NTSTATUS read_nt_symlink( const WCHAR *name, WCHAR *target, DWORD size )
  96 {
  97     NTSTATUS status;
  98     OBJECT_ATTRIBUTES attr;
  99     UNICODE_STRING nameW;
 100     HANDLE handle;
 101
 102     attr.Length = sizeof(attr);
 103     attr.RootDirectory = 0;
 104     attr.Attributes = OBJ_CASE_INSENSITIVE;
 105     attr.ObjectName = &nameW;
 106     attr.SecurityDescriptor = NULL;
 107     attr.SecurityQualityOfService = NULL;
 108     RtlInitUnicodeString( &nameW, name );
 109
 110     if (!(status = NtOpenSymbolicLinkObject( &handle, SYMBOLIC_LINK_QUERY, &attr )))
 111     {
 112         UNICODE_STRING targetW;
 113         targetW.Buffer = target;
 114         targetW.MaximumLength = (size - 1) * sizeof(WCHAR);
 115         status = NtQuerySymbolicLinkObject( handle, &targetW, NULL );
 116         if (!status) target[targetW.Length / sizeof(WCHAR)] = 0;
 117         NtClose( handle );
 118     }
 119     return status;
 120 }
 121
 122 /* open a handle to a device root */
 123 static BOOL open_device_root( LPCWSTR root, HANDLE *handle )
 124 {
 125     static const WCHAR default_rootW[] = {'\\',0};
 126     UNICODE_STRING nt_name;
 127     OBJECT_ATTRIBUTES attr;
 128     IO_STATUS_BLOCK io;
 129     NTSTATUS status;
 130
 131     if (!root) root = default_rootW;
 132     if (!RtlDosPathNameToNtPathName_U( root, &nt_name, NULL, NULL ))
 133     {
 134         SetLastError( ERROR_PATH_NOT_FOUND );
 135         return FALSE;
 136     }
 137     attr.Length = sizeof(attr);
 138     attr.RootDirectory = 0;
 139     attr.Attributes = OBJ_CASE_INSENSITIVE;
 140     attr.ObjectName = &nt_name;
 141     attr.SecurityDescriptor = NULL;
 142     attr.SecurityQualityOfService = NULL;
 143
 144     status = NtOpenFile( handle, SYNCHRONIZE, &attr, &io, 0,
 145                          FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 146     RtlFreeUnicodeString( &nt_name );
 147     if (status != STATUS_SUCCESS)
 148     {
 149         SetLastError( RtlNtStatusToDosError(status) );
 150         return FALSE;
 151     }
 152     return TRUE;
 153 }
 154
 155 /* query the type of a drive from the mount manager */
 156 static DWORD get_mountmgr_drive_type( LPCWSTR root )
 157 {
 158     HANDLE mgr;
 159     struct mountmgr_unix_drive data;
 160     DWORD br;
 161
 162     memset( &data, 0, sizeof(data) );
 163     if (root) data.letter = root[0];
 164     else
 165     {
 166         WCHAR curdir[MAX_PATH];
 167         GetCurrentDirectoryW( MAX_PATH, curdir );
 168         if (curdir[1] != ':' || curdir[2] != '\\') return DRIVE_UNKNOWN;
 169         data.letter = curdir[0];
 170     }
 171
 172     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, GENERIC_READ,
 173                        FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
 174     if (mgr == INVALID_HANDLE_VALUE) return DRIVE_UNKNOWN;
 175
 176     if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_UNIX_DRIVE, &data, sizeof(data), &data,
 177                           sizeof(data), &br, NULL ) && GetLastError() != ERROR_MORE_DATA)
 178         data.type = DRIVE_UNKNOWN;
 179
 180     CloseHandle( mgr );
 181     return data.type;
 182 }
 183
 184 /* get the label by reading it from a file at the root of the filesystem */
 185 static void get_filesystem_label( const UNICODE_STRING *device, WCHAR *label, DWORD len )
 186 {
 187     static const WCHAR labelW[] = {'.','w','i','n','d','o','w','s','-','l','a','b','e','l',0};
 188     HANDLE handle;
 189     UNICODE_STRING name;
 190     IO_STATUS_BLOCK io;
 191     OBJECT_ATTRIBUTES attr;
 192
 193     label[0] = 0;
 194
 195     attr.Length = sizeof(attr);
 196     attr.RootDirectory = 0;
 197     attr.Attributes = OBJ_CASE_INSENSITIVE;
 198     attr.ObjectName = &name;
 199     attr.SecurityDescriptor = NULL;
 200     attr.SecurityQualityOfService = NULL;
 201
 202     name.MaximumLength = device->Length + sizeof(labelW);
 203     name.Length = name.MaximumLength - sizeof(WCHAR);
 204     if (!(name.Buffer = HeapAlloc( GetProcessHeap(), 0, name.MaximumLength ))) return;
 205
 206     memcpy( name.Buffer, device->Buffer, device->Length );
 207     memcpy( name.Buffer + device->Length / sizeof(WCHAR), labelW, sizeof(labelW) );
 208     if (!NtOpenFile( &handle, GENERIC_READ | SYNCHRONIZE, &attr, &io, FILE_SHARE_READ|FILE_SHARE_WRITE,
 209                      FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT ))
 210     {
 211         char buffer[256], *p;
 212         DWORD size;
 213
 214         if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
 215         CloseHandle( handle );
 216         p = buffer + size;
 217         while (p > buffer && (p[-1] == ' ' || p[-1] == '\r' || p[-1] == '\n')) p--;
 218         *p = 0;
 219         if (!MultiByteToWideChar( CP_UNIXCP, 0, buffer, -1, label, len ))
 220             label[len-1] = 0;
 221     }
 222     RtlFreeUnicodeString( &name );
 223 }
 224
 225 /* get the serial number by reading it from a file at the root of the filesystem */
 226 static DWORD get_filesystem_serial( const UNICODE_STRING *device )
 227 {
 228     static const WCHAR serialW[] = {'.','w','i','n','d','o','w','s','-','s','e','r','i','a','l',0};
 229     HANDLE handle;
 230     UNICODE_STRING name;
 231     IO_STATUS_BLOCK io;
 232     OBJECT_ATTRIBUTES attr;
 233     DWORD ret = 0;
 234
 235     attr.Length = sizeof(attr);
 236     attr.RootDirectory = 0;
 237     attr.Attributes = OBJ_CASE_INSENSITIVE;
 238     attr.ObjectName = &name;
 239     attr.SecurityDescriptor = NULL;
 240     attr.SecurityQualityOfService = NULL;
 241
 242     name.MaximumLength = device->Length + sizeof(serialW);
 243     name.Length = name.MaximumLength - sizeof(WCHAR);
 244     if (!(name.Buffer = HeapAlloc( GetProcessHeap(), 0, name.MaximumLength ))) return 0;
 245
 246     memcpy( name.Buffer, device->Buffer, device->Length );
 247     memcpy( name.Buffer + device->Length / sizeof(WCHAR), serialW, sizeof(serialW) );
 248     if (!NtOpenFile( &handle, GENERIC_READ | SYNCHRONIZE, &attr, &io, FILE_SHARE_READ|FILE_SHARE_WRITE,
 249                      FILE_SYNCHRONOUS_IO_NONALERT ))
 250     {
 251         char buffer[32];
 252         DWORD size;
 253
 254         if (!ReadFile( handle, buffer, sizeof(buffer)-1, &size, NULL )) size = 0;
 255         CloseHandle( handle );
 256         buffer[size] = 0;
 257         ret = strtoul( buffer, NULL, 16 );
 258     }
 259     RtlFreeUnicodeString( &name );
 260     return ret;
 261 }
 262
 263
 264 /******************************************************************
 265  *              VOLUME_FindCdRomDataBestVoldesc
 266  */
 267 static DWORD VOLUME_FindCdRomDataBestVoldesc( HANDLE handle )
 268 {
 269     BYTE cur_vd_type, max_vd_type = 0;
 270     BYTE buffer[0x800];
 271     DWORD size, offs, best_offs = 0, extra_offs = 0;
 272
 273     for (offs = 0x8000; offs <= 0x9800; offs += 0x800)
 274     {
 275         /* if 'CDROM' occurs at position 8, this is a pre-iso9660 cd, and
 276          * the volume label is displaced forward by 8
 277          */
 278         if (SetFilePointer( handle, offs, NULL, FILE_BEGIN ) != offs) break;
 279         if (!ReadFile( handle, buffer, sizeof(buffer), &size, NULL )) break;
 280         if (size != sizeof(buffer)) break;
 281         /* check for non-ISO9660 signature */
 282         if (!memcmp( buffer + 11, "ROM", 3 )) extra_offs = 8;
 283         cur_vd_type = buffer[extra_offs];
 284         if (cur_vd_type == 0xff) /* voldesc set terminator */
 285             break;
 286         if (cur_vd_type > max_vd_type)
 287         {
 288             max_vd_type = cur_vd_type;
 289             best_offs = offs + extra_offs;
 290         }
 291     }
 292     return best_offs;
 293 }
 294
 295
 296 /***********************************************************************
 297  *           VOLUME_ReadFATSuperblock
 298  */
 299 static enum fs_type VOLUME_ReadFATSuperblock( HANDLE handle, BYTE *buff )
 300 {
 301     DWORD size;
 302
 303     /* try a fixed disk, with a FAT partition */
 304     if (SetFilePointer( handle, 0, NULL, FILE_BEGIN ) != 0 ||
 305         !ReadFile( handle, buff, SUPERBLOCK_SIZE, &size, NULL ))
 306     {
 307         if (GetLastError() == ERROR_BAD_DEV_TYPE) return FS_UNKNOWN;  /* not a real device */
 308         return FS_ERROR;
 309     }
 310
 311     if (size < SUPERBLOCK_SIZE) return FS_UNKNOWN;
 312
 313     /* FIXME: do really all FAT have their name beginning with
 314      * "FAT" ? (At least FAT12, FAT16 and FAT32 have :)
 315      */
 316     if (!memcmp(buff+0x36, "FAT", 3) || !memcmp(buff+0x52, "FAT", 3))
 317     {
 318         /* guess which type of FAT we have */
 319         int reasonable;
 320         unsigned int sectors,
 321                      sect_per_fat,
 322                      total_sectors,
 323                      num_boot_sectors,
 324                      num_fats,
 325                      num_root_dir_ents,
 326                      bytes_per_sector,
 327                      sectors_per_cluster,
 328                      nclust;
 329         sect_per_fat = GETWORD(buff, 0x16);
 330         if (!sect_per_fat) sect_per_fat = GETLONG(buff, 0x24);
 331         total_sectors = GETWORD(buff, 0x13);
 332         if (!total_sectors)
 333             total_sectors = GETLONG(buff, 0x20);
 334         num_boot_sectors = GETWORD(buff, 0x0e);
 335         num_fats =  buff[0x10];
 336         num_root_dir_ents = GETWORD(buff, 0x11);
 337         bytes_per_sector = GETWORD(buff, 0x0b);
 338         sectors_per_cluster = buff[0x0d];
 339         /* check if the parameters are reasonable and will not cause
 340          * arithmetic errors in the calculation */
 341         reasonable = num_boot_sectors < total_sectors &&
 342                      num_fats < 16 &&
 343                      bytes_per_sector >= 512 && bytes_per_sector % 512 == 0 &&
 344                      sectors_per_cluster >= 1;
 345         if (!reasonable) return FS_UNKNOWN;
 346         sectors =  total_sectors - num_boot_sectors - num_fats * sect_per_fat -
 347             (num_root_dir_ents * 32 + bytes_per_sector - 1) / bytes_per_sector;
 348         nclust = sectors / sectors_per_cluster;
 349         if ((buff[0x42] == 0x28 || buff[0x42] == 0x29) &&
 350                 !memcmp(buff+0x52, "FAT", 3)) return FS_FAT32;
 351         if (nclust < 65525)
 352         {
 353             if ((buff[0x26] == 0x28 || buff[0x26] == 0x29) &&
 354                     !memcmp(buff+0x36, "FAT", 3))
 355                 return FS_FAT1216;
 356         }
 357     }
 358     return FS_UNKNOWN;
 359 }
 360
 361
 362 /***********************************************************************
 363  *           VOLUME_ReadCDBlock
 364  */
 365 static BOOL VOLUME_ReadCDBlock( HANDLE handle, BYTE *buff, INT offs )
 366 {
 367     DWORD size, whence = offs >= 0 ? FILE_BEGIN : FILE_END;
 368
 369     if (SetFilePointer( handle, offs, NULL, whence ) != offs ||
 370         !ReadFile( handle, buff, SUPERBLOCK_SIZE, &size, NULL ) ||
 371         size != SUPERBLOCK_SIZE)
 372         return FALSE;
 373
 374     return TRUE;
 375 }
 376
 377
 378 /***********************************************************************
 379  *           VOLUME_ReadCDSuperblock
 380  */
 381 static enum fs_type VOLUME_ReadCDSuperblock( HANDLE handle, BYTE *buff )
 382 {
 383     int i;
 384     DWORD offs;
 385
 386     /* Check UDF first as UDF and ISO9660 structures can coexist on the same medium
 387      *  Starting from sector 16, we may find :
 388      *  - a CD-ROM Volume Descriptor Set (ISO9660) containing one or more Volume Descriptors
 389      *  - an Extended Area (UDF) -- [E] 2/8.3.1 and [U] 2.1.7
 390      *  There is no explicit end so read 16 sectors and then give up */
 391     for( i=16; i<16+16; i++)
 392     {
 393         if (!VOLUME_ReadCDBlock(handle, buff, i*BLOCK_SIZE))
 394             continue;
 395
 396         /* We are supposed to check "BEA01", "NSR0x" and "TEA01" IDs + verify tag checksum
 397          *  but we assume the volume is well-formatted */
 398         if (!memcmp(&buff[1], "BEA01", 5)) return FS_UDF;
 399     }
 400
 401     offs = VOLUME_FindCdRomDataBestVoldesc( handle );
 402     if (!offs) return FS_UNKNOWN;
 403
 404     if (!VOLUME_ReadCDBlock(handle, buff, offs))
 405         return FS_ERROR;
 406
 407     /* check for the iso9660 identifier */
 408     if (!memcmp(&buff[1], "CD001", 5)) return FS_ISO9660;
 409     return FS_UNKNOWN;
 410 }
 411
 412
 413 /**************************************************************************
 414  *                        UDF_Find_PVD
 415  * Find the Primary Volume Descriptor
 416  */
 417 static BOOL UDF_Find_PVD( HANDLE handle, BYTE pvd[] )
 418 {
 419     unsigned int i;
 420     DWORD offset;
 421     INT locations[] = { 256, -1, -257, 512 };
 422
 423     for(i=0; i<sizeof(locations)/sizeof(locations[0]); i++)
 424     {
 425         if (!VOLUME_ReadCDBlock(handle, pvd, locations[i]*BLOCK_SIZE))
 426             return FALSE;
 427
 428         /* Tag Identifier of Anchor Volume Descriptor Pointer is 2 -- [E] 3/10.2.1 */
 429         if (pvd[0]==2 && pvd[1]==0)
 430         {
 431             /* Tag location (Uint32) at offset 12, little-endian */
 432             offset  = pvd[20 + 0];
 433             offset |= pvd[20 + 1] << 8;
 434             offset |= pvd[20 + 2] << 16;
 435             offset |= pvd[20 + 3] << 24;
 436             offset *= BLOCK_SIZE;
 437
 438             if (!VOLUME_ReadCDBlock(handle, pvd, offset))
 439                 return FALSE;
 440
 441             /* Check for the Primary Volume Descriptor Tag Id -- [E] 3/10.1.1 */
 442             if (pvd[0]!=1 || pvd[1]!=0)
 443                 return FALSE;
 444
 445             /* 8 or 16 bits per character -- [U] 2.1.1 */
 446             if (!(pvd[24]==8 || pvd[24]==16))
 447                 return FALSE;
 448
 449             return TRUE;
 450         }
 451     }
 452
 453     return FALSE;
 454 }
 455
 456
 457 /**************************************************************************
 458  *                              VOLUME_GetSuperblockLabel
 459  */
 460 static void VOLUME_GetSuperblockLabel( const UNICODE_STRING *device, HANDLE handle,
 461                                        enum fs_type type, const BYTE *superblock,
 462                                        WCHAR *label, DWORD len )
 463 {
 464     const BYTE *label_ptr = NULL;
 465     DWORD label_len;
 466
 467     switch(type)
 468     {
 469     case FS_ERROR:
 470         label_len = 0;
 471         break;
 472     case FS_UNKNOWN:
 473         get_filesystem_label( device, label, len );
 474         return;
 475     case FS_FAT1216:
 476         label_ptr = superblock + 0x2b;
 477         label_len = 11;
 478         break;
 479     case FS_FAT32:
 480         label_ptr = superblock + 0x47;
 481         label_len = 11;
 482         break;
 483     case FS_ISO9660:
 484         {
 485             BYTE ver = superblock[0x5a];
 486
 487             if (superblock[0x58] == 0x25 && superblock[0x59] == 0x2f &&  /* Unicode ID */
 488                 ((ver == 0x40) || (ver == 0x43) || (ver == 0x45)))
 489             { /* yippee, unicode */
 490                 unsigned int i;
 491
 492                 if (len > 17) len = 17;
 493                 for (i = 0; i < len-1; i++)
 494                     label[i] = (superblock[40+2*i] << 8) | superblock[41+2*i];
 495                 label[i] = 0;
 496                 while (i && label[i-1] == ' ') label[--i] = 0;
 497                 return;
 498             }
 499             label_ptr = superblock + 40;
 500             label_len = 32;
 501             break;
 502         }
 503     case FS_UDF:
 504         {
 505             BYTE pvd[BLOCK_SIZE];
 506
 507             if(!UDF_Find_PVD(handle, pvd))
 508             {
 509                 label_len = 0;
 510                 break;
 511             }
 512
 513             /* [E] 3/10.1.4 and [U] 2.1.1 */
 514             if(pvd[24]==8)
 515             {
 516                 label_ptr = pvd + 24 + 1;
 517                 label_len = pvd[24+32-1];
 518                 break;
 519             }
 520             else
 521             {
 522                 unsigned int i;
 523
 524                 label_len = 1 + pvd[24+32-1];
 525                 for(i=0; i<label_len && i<len; i+=2)
 526                     label[i/2]  = (pvd[24+1 +i] << 8) | pvd[24+1 +i+1];
 527                 label[label_len] = 0;
 528                 return;
 529             }
 530         }
 531     }
 532     if (label_len) RtlMultiByteToUnicodeN( label, (len-1) * sizeof(WCHAR),
 533                                            &label_len, (LPCSTR)label_ptr, label_len );
 534     label_len /= sizeof(WCHAR);
 535     label[label_len] = 0;
 536     while (label_len && label[label_len-1] == ' ') label[--label_len] = 0;
 537 }
 538
 539
 540 /**************************************************************************
 541  *                              UDF_Find_FSD_Sector
 542  * Find the File Set Descriptor used to compute the serial of a UDF volume
 543  */
 544 static int UDF_Find_FSD_Sector( HANDLE handle, BYTE block[] )
 545 {
 546     int i, PVD_sector, PD_sector, PD_length;
 547
 548     if(!UDF_Find_PVD(handle,block))
 549         goto default_sector;
 550
 551     /* Retrieve the tag location of the PVD -- [E] 3/7.2 */
 552     PVD_sector  = block[12 + 0];
 553     PVD_sector |= block[12 + 1] << 8;
 554     PVD_sector |= block[12 + 2] << 16;
 555     PVD_sector |= block[12 + 3] << 24;
 556
 557     /* Find the Partition Descriptor */
 558     for(i=PVD_sector+1; ; i++)
 559     {
 560         if(!VOLUME_ReadCDBlock(handle, block, i*BLOCK_SIZE))
 561             goto default_sector;
 562
 563         /* Partition Descriptor Tag Id -- [E] 3/10.5.1 */
 564         if(block[0]==5 && block[1]==0)
 565             break;
 566
 567         /* Terminating Descriptor Tag Id -- [E] 3/10.9.1 */
 568         if(block[0]==8 && block[1]==0)
 569             goto default_sector;
 570     }
 571
 572     /* Find the partition starting location -- [E] 3/10.5.8 */
 573     PD_sector  = block[188 + 0];
 574     PD_sector |= block[188 + 1] << 8;
 575     PD_sector |= block[188 + 2] << 16;
 576     PD_sector |= block[188 + 3] << 24;
 577
 578     /* Find the partition length -- [E] 3/10.5.9 */
 579     PD_length  = block[192 + 0];
 580     PD_length |= block[192 + 1] << 8;
 581     PD_length |= block[192 + 2] << 16;
 582     PD_length |= block[192 + 3] << 24;
 583
 584     for(i=PD_sector; i<PD_sector+PD_length; i++)
 585     {
 586         if(!VOLUME_ReadCDBlock(handle, block, i*BLOCK_SIZE))
 587             goto default_sector;
 588
 589         /* File Set Descriptor Tag Id -- [E] 3/14.1.1 */
 590         if(block[0]==0 && block[1]==1)
 591             return i;
 592     }
 593
 594 default_sector:
 595     WARN("FSD sector not found, serial may be incorrect\n");
 596     return 257;
 597 }
 598
 599
 600 /**************************************************************************
 601  *                              VOLUME_GetSuperblockSerial
 602  */
 603 static DWORD VOLUME_GetSuperblockSerial( const UNICODE_STRING *device, HANDLE handle,
 604                                          enum fs_type type, const BYTE *superblock )
 605 {
 606     int FSD_sector;
 607     BYTE block[BLOCK_SIZE];
 608
 609     switch(type)
 610     {
 611     case FS_ERROR:
 612         break;
 613     case FS_UNKNOWN:
 614         return get_filesystem_serial( device );
 615     case FS_FAT1216:
 616         return GETLONG( superblock, 0x27 );
 617     case FS_FAT32:
 618         return GETLONG( superblock, 0x33 );
 619     case FS_UDF:
 620         FSD_sector = UDF_Find_FSD_Sector(handle, block);
 621         if (!VOLUME_ReadCDBlock(handle, block, FSD_sector*BLOCK_SIZE))
 622             break;
 623         superblock = block;
 624         /* fallthrough */
 625     case FS_ISO9660:
 626         {
 627             BYTE sum[4];
 628             int i;
 629
 630             sum[0] = sum[1] = sum[2] = sum[3] = 0;
 631             for (i = 0; i < 2048; i += 4)
 632             {
 633                 /* DON'T optimize this into DWORD !! (breaks overflow) */
 634                 sum[0] += superblock[i+0];
 635                 sum[1] += superblock[i+1];
 636                 sum[2] += superblock[i+2];
 637                 sum[3] += superblock[i+3];
 638             }
 639             /*
 640              * OK, another braindead one... argh. Just believe it.
 641              * Me$$ysoft chose to reverse the serial number in NT4/W2K.
 642              * It's true and nobody will ever be able to change it.
 643              */
 644             if ((GetVersion() & 0x80000000) || type == FS_UDF)
 645                 return (sum[3] << 24) | (sum[2] << 16) | (sum[1] << 8) | sum[0];
 646             else
 647                 return (sum[0] << 24) | (sum[1] << 16) | (sum[2] << 8) | sum[3];
 648         }
 649     }
 650     return 0;
 651 }
 652
 653
 654 /**************************************************************************
 655  *                              VOLUME_GetAudioCDSerial
 656  */
 657 static DWORD VOLUME_GetAudioCDSerial( const CDROM_TOC *toc )
 658 {
 659     DWORD serial = 0;
 660     int i;
 661
 662     for (i = 0; i <= toc->LastTrack - toc->FirstTrack; i++)
 663         serial += ((toc->TrackData[i].Address[1] << 16) |
 664                    (toc->TrackData[i].Address[2] << 8) |
 665                    toc->TrackData[i].Address[3]);
 666
 667     /*
 668      * dwStart, dwEnd collect the beginning and end of the disc respectively, in
 669      * frames.
 670      * There it is collected for correcting the serial when there are less than
 671      * 3 tracks.
 672      */
 673     if (toc->LastTrack - toc->FirstTrack + 1 < 3)
 674     {
 675         DWORD dwStart = FRAME_OF_TOC(toc, toc->FirstTrack);
 676         DWORD dwEnd = FRAME_OF_TOC(toc, toc->LastTrack + 1);
 677         serial += dwEnd - dwStart;
 678     }
 679     return serial;
 680 }
 681
 682
 683 /***********************************************************************
 684  *           GetVolumeInformationW   (KERNEL32.@)
 685  */
 686 BOOL WINAPI GetVolumeInformationW( LPCWSTR root, LPWSTR label, DWORD label_len,
 687                                    DWORD *serial, DWORD *filename_len, DWORD *flags,
 688                                    LPWSTR fsname, DWORD fsname_len )
 689 {
 690     static const WCHAR audiocdW[] = {'A','u','d','i','o',' ','C','D',0};
 691     static const WCHAR fatW[] = {'F','A','T',0};
 692     static const WCHAR fat32W[] = {'F','A','T','3','2',0};
 693     static const WCHAR ntfsW[] = {'N','T','F','S',0};
 694     static const WCHAR cdfsW[] = {'C','D','F','S',0};
 695     static const WCHAR udfW[] = {'U','D','F',0};
 696     static const WCHAR default_rootW[] = {'\\',0};
 697
 698     HANDLE handle;
 699     NTSTATUS status;
 700     UNICODE_STRING nt_name;
 701     IO_STATUS_BLOCK io;
 702     OBJECT_ATTRIBUTES attr;
 703     FILE_FS_DEVICE_INFORMATION info;
 704     WCHAR *p;
 705     enum fs_type type = FS_UNKNOWN;
 706     BOOL ret = FALSE;
 707
 708     if (!root) root = default_rootW;
 709     if (!RtlDosPathNameToNtPathName_U( root, &nt_name, NULL, NULL ))
 710     {
 711         SetLastError( ERROR_PATH_NOT_FOUND );
 712         return FALSE;
 713     }
 714     /* there must be exactly one backslash in the name, at the end */
 715     p = memchrW( nt_name.Buffer + 4, '\\', (nt_name.Length - 4) / sizeof(WCHAR) );
 716     if (p != nt_name.Buffer + nt_name.Length / sizeof(WCHAR) - 1)
 717     {
 718         /* check if root contains an explicit subdir */
 719         if (root[0] && root[1] == ':') root += 2;
 720         while (*root == '\\') root++;
 721         if (strchrW( root, '\\' ))
 722             SetLastError( ERROR_DIR_NOT_ROOT );
 723         else
 724             SetLastError( ERROR_INVALID_NAME );
 725         goto done;
 726     }
 727
 728     /* try to open the device */
 729
 730     attr.Length = sizeof(attr);
 731     attr.RootDirectory = 0;
 732     attr.Attributes = OBJ_CASE_INSENSITIVE;
 733     attr.ObjectName = &nt_name;
 734     attr.SecurityDescriptor = NULL;
 735     attr.SecurityQualityOfService = NULL;
 736
 737     nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
 738     status = NtOpenFile( &handle, GENERIC_READ | SYNCHRONIZE, &attr, &io, FILE_SHARE_READ | FILE_SHARE_WRITE,
 739                          FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 740     nt_name.Length += sizeof(WCHAR);
 741
 742     if (status == STATUS_SUCCESS)
 743     {
 744         BYTE superblock[SUPERBLOCK_SIZE];
 745         CDROM_TOC toc;
 746         DWORD br;
 747
 748         /* check for audio CD */
 749         /* FIXME: we only check the first track for now */
 750         if (DeviceIoControl( handle, IOCTL_CDROM_READ_TOC, NULL, 0, &toc, sizeof(toc), &br, 0 ))
 751         {
 752             if (!(toc.TrackData[0].Control & 0x04))  /* audio track */
 753             {
 754                 TRACE( "%s: found audio CD\n", debugstr_w(nt_name.Buffer) );
 755                 if (label) lstrcpynW( label, audiocdW, label_len );
 756                 if (serial) *serial = VOLUME_GetAudioCDSerial( &toc );
 757                 CloseHandle( handle );
 758                 type = FS_ISO9660;
 759                 goto fill_fs_info;
 760             }
 761             type = VOLUME_ReadCDSuperblock( handle, superblock );
 762         }
 763         else
 764         {
 765             type = VOLUME_ReadFATSuperblock( handle, superblock );
 766             if (type == FS_UNKNOWN) type = VOLUME_ReadCDSuperblock( handle, superblock );
 767         }
 768         TRACE( "%s: found fs type %d\n", debugstr_w(nt_name.Buffer), type );
 769         if (type == FS_ERROR)
 770         {
 771             CloseHandle( handle );
 772             goto done;
 773         }
 774
 775         if (label && label_len) VOLUME_GetSuperblockLabel( &nt_name, handle, type, superblock, label, label_len );
 776         if (serial) *serial = VOLUME_GetSuperblockSerial( &nt_name, handle, type, superblock );
 777         CloseHandle( handle );
 778         goto fill_fs_info;
 779     }
 780     else TRACE( "cannot open device %s: %x\n", debugstr_w(nt_name.Buffer), status );
 781
 782     /* we couldn't open the device, fallback to default strategy */
 783
 784     status = NtOpenFile( &handle, SYNCHRONIZE, &attr, &io, 0, FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
 785     if (status != STATUS_SUCCESS)
 786     {
 787         SetLastError( RtlNtStatusToDosError(status) );
 788         goto done;
 789     }
 790     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsDeviceInformation );
 791     NtClose( handle );
 792     if (status != STATUS_SUCCESS)
 793     {
 794         SetLastError( RtlNtStatusToDosError(status) );
 795         goto done;
 796     }
 797     if (info.DeviceType == FILE_DEVICE_CD_ROM_FILE_SYSTEM) type = FS_ISO9660;
 798
 799     if (label && label_len) get_filesystem_label( &nt_name, label, label_len );
 800     if (serial) *serial = get_filesystem_serial( &nt_name );
 801
 802 fill_fs_info:  /* now fill in the information that depends on the file system type */
 803
 804     switch(type)
 805     {
 806     case FS_ISO9660:
 807         if (fsname) lstrcpynW( fsname, cdfsW, fsname_len );
 808         if (filename_len) *filename_len = 221;
 809         if (flags) *flags = FILE_READ_ONLY_VOLUME;
 810         break;
 811     case FS_UDF:
 812         if (fsname) lstrcpynW( fsname, udfW, fsname_len );
 813         if (filename_len) *filename_len = 255;
 814         if (flags)
 815             *flags = FILE_READ_ONLY_VOLUME | FILE_UNICODE_ON_DISK | FILE_CASE_SENSITIVE_SEARCH;
 816         break;
 817     case FS_FAT1216:
 818         if (fsname) lstrcpynW( fsname, fatW, fsname_len );
 819     case FS_FAT32:
 820         if (type == FS_FAT32 && fsname) lstrcpynW( fsname, fat32W, fsname_len );
 821         if (filename_len) *filename_len = 255;
 822         if (flags) *flags = FILE_CASE_PRESERVED_NAMES;  /* FIXME */
 823         break;
 824     default:
 825         if (fsname) lstrcpynW( fsname, ntfsW, fsname_len );
 826         if (filename_len) *filename_len = 255;
 827         if (flags) *flags = FILE_CASE_PRESERVED_NAMES | FILE_PERSISTENT_ACLS;
 828         break;
 829     }
 830     ret = TRUE;
 831
 832 done:
 833     RtlFreeUnicodeString( &nt_name );
 834     return ret;
 835 }
 836
 837
 838 /***********************************************************************
 839  *           GetVolumeInformationA   (KERNEL32.@)
 840  */
 841 BOOL WINAPI GetVolumeInformationA( LPCSTR root, LPSTR label,
 842                                    DWORD label_len, DWORD *serial,
 843                                    DWORD *filename_len, DWORD *flags,
 844                                    LPSTR fsname, DWORD fsname_len )
 845 {
 846     WCHAR *rootW = NULL;
 847     LPWSTR labelW, fsnameW;
 848     BOOL ret;
 849
 850     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
 851
 852     labelW = label ? HeapAlloc(GetProcessHeap(), 0, label_len * sizeof(WCHAR)) : NULL;
 853     fsnameW = fsname ? HeapAlloc(GetProcessHeap(), 0, fsname_len * sizeof(WCHAR)) : NULL;
 854
 855     if ((ret = GetVolumeInformationW(rootW, labelW, label_len, serial,
 856                                     filename_len, flags, fsnameW, fsname_len)))
 857     {
 858         if (label) FILE_name_WtoA( labelW, -1, label, label_len );
 859         if (fsname) FILE_name_WtoA( fsnameW, -1, fsname, fsname_len );
 860     }
 861
 862     HeapFree( GetProcessHeap(), 0, labelW );
 863     HeapFree( GetProcessHeap(), 0, fsnameW );
 864     return ret;
 865 }
 866
 867
 868
 869 /***********************************************************************
 870  *           SetVolumeLabelW   (KERNEL32.@)
 871  */
 872 BOOL WINAPI SetVolumeLabelW( LPCWSTR root, LPCWSTR label )
 873 {
 874     WCHAR device[] = {'\\','\\','.','\\','A',':',0};
 875     HANDLE handle;
 876     enum fs_type type = FS_UNKNOWN;
 877
 878     if (!root)
 879     {
 880         WCHAR path[MAX_PATH];
 881         GetCurrentDirectoryW( MAX_PATH, path );
 882         device[4] = path[0];
 883     }
 884     else
 885     {
 886         if (!root[0] || root[1] != ':')
 887         {
 888             SetLastError( ERROR_INVALID_NAME );
 889             return FALSE;
 890         }
 891         device[4] = root[0];
 892     }
 893
 894     /* try to open the device */
 895
 896     handle = CreateFileW( device, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE,
 897                           NULL, OPEN_EXISTING, 0, 0 );
 898     if (handle != INVALID_HANDLE_VALUE)
 899     {
 900         BYTE superblock[SUPERBLOCK_SIZE];
 901
 902         type = VOLUME_ReadFATSuperblock( handle, superblock );
 903         if (type == FS_UNKNOWN) type = VOLUME_ReadCDSuperblock( handle, superblock );
 904         CloseHandle( handle );
 905         if (type != FS_UNKNOWN)
 906         {
 907             /* we can't set the label on FAT or CDROM file systems */
 908             TRACE( "cannot set label on device %s type %d\n", debugstr_w(device), type );
 909             SetLastError( ERROR_ACCESS_DENIED );
 910             return FALSE;
 911         }
 912     }
 913     else
 914     {
 915         TRACE( "cannot open device %s: err %d\n", debugstr_w(device), GetLastError() );
 916         if (GetLastError() == ERROR_ACCESS_DENIED) return FALSE;
 917     }
 918
 919     /* we couldn't open the device, fallback to default strategy */
 920
 921     switch(GetDriveTypeW( root ))
 922     {
 923     case DRIVE_UNKNOWN:
 924     case DRIVE_NO_ROOT_DIR:
 925         SetLastError( ERROR_NOT_READY );
 926         break;
 927     case DRIVE_REMOVABLE:
 928     case DRIVE_FIXED:
 929         {
 930             WCHAR labelW[] = {'A',':','\\','.','w','i','n','d','o','w','s','-','l','a','b','e','l',0};
 931
 932             labelW[0] = device[4];
 933
 934             if (!label[0])  /* delete label file when setting an empty label */
 935                 return DeleteFileW( labelW ) || GetLastError() == ERROR_FILE_NOT_FOUND;
 936
 937             handle = CreateFileW( labelW, GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
 938                                   CREATE_ALWAYS, 0, 0 );
 939             if (handle != INVALID_HANDLE_VALUE)
 940             {
 941                 char buffer[64];
 942                 DWORD size;
 943
 944                 if (!WideCharToMultiByte( CP_UNIXCP, 0, label, -1, buffer, sizeof(buffer)-1, NULL, NULL ))
 945                     buffer[sizeof(buffer)-2] = 0;
 946                 strcat( buffer, "\n" );
 947                 WriteFile( handle, buffer, strlen(buffer), &size, NULL );
 948                 CloseHandle( handle );
 949                 return TRUE;
 950             }
 951             break;
 952         }
 953     case DRIVE_REMOTE:
 954     case DRIVE_RAMDISK:
 955     case DRIVE_CDROM:
 956         SetLastError( ERROR_ACCESS_DENIED );
 957         break;
 958     }
 959     return FALSE;
 960 }
 961
 962 /***********************************************************************
 963  *           SetVolumeLabelA   (KERNEL32.@)
 964  */
 965 BOOL WINAPI SetVolumeLabelA(LPCSTR root, LPCSTR volname)
 966 {
 967     WCHAR *rootW = NULL, *volnameW = NULL;
 968     BOOL ret;
 969
 970     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
 971     if (volname && !(volnameW = FILE_name_AtoW( volname, TRUE ))) return FALSE;
 972     ret = SetVolumeLabelW( rootW, volnameW );
 973     HeapFree( GetProcessHeap(), 0, volnameW );
 974     return ret;
 975 }
 976
 977
 978 /***********************************************************************
 979  *           GetVolumeNameForVolumeMountPointA   (KERNEL32.@)
 980  */
 981 BOOL WINAPI GetVolumeNameForVolumeMountPointA( LPCSTR path, LPSTR volume, DWORD size )
 982 {
 983     BOOL ret;
 984     WCHAR volumeW[50], *pathW = NULL;
 985     DWORD len = min( sizeof(volumeW) / sizeof(WCHAR), size );
 986
 987     TRACE("(%s, %p, %x)\n", debugstr_a(path), volume, size);
 988
 989     if (!path || !(pathW = FILE_name_AtoW( path, TRUE )))
 990         return FALSE;
 991
 992     if ((ret = GetVolumeNameForVolumeMountPointW( pathW, volumeW, len )))
 993         FILE_name_WtoA( volumeW, -1, volume, len );
 994
 995     HeapFree( GetProcessHeap(), 0, pathW );
 996     return ret;
 997 }
 998
 999 /***********************************************************************
1000  *           GetVolumeNameForVolumeMountPointW   (KERNEL32.@)
1001  */
1002 BOOL WINAPI GetVolumeNameForVolumeMountPointW( LPCWSTR path, LPWSTR volume, DWORD size )
1003 {
1004     static const WCHAR prefixW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\',0};
1005     static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{'};
1006     static const WCHAR trailingW[] = {'\\',0};
1007
1008     MOUNTMGR_MOUNT_POINT *input = NULL, *o1;
1009     MOUNTMGR_MOUNT_POINTS *output = NULL;
1010     WCHAR *p;
1011     char *r;
1012     DWORD i, i_size = 1024, o_size = 1024;
1013     WCHAR *nonpersist_name;
1014     WCHAR symlink_name[MAX_PATH];
1015     NTSTATUS status;
1016     HANDLE mgr = INVALID_HANDLE_VALUE;
1017     BOOL ret = FALSE;
1018     DWORD br;
1019
1020     TRACE("(%s, %p, %x)\n", debugstr_w(path), volume, size);
1021     if (path[lstrlenW(path)-1] != '\\')
1022     {
1023         SetLastError( ERROR_INVALID_NAME );
1024         return FALSE;
1025     }
1026
1027     if (size < 50)
1028     {
1029         SetLastError( ERROR_FILENAME_EXCED_RANGE );
1030         return FALSE;
1031     }
1032     /* if length of input is > 3 then it must be a mounted folder */
1033     if (lstrlenW(path) > 3)
1034     {
1035         FIXME("Mounted Folders are not yet supported\n");
1036         SetLastError( ERROR_NOT_A_REPARSE_POINT );
1037         return FALSE;
1038     }
1039
1040     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ,
1041                         NULL, OPEN_EXISTING, 0, 0 );
1042     if (mgr == INVALID_HANDLE_VALUE) return FALSE;
1043
1044     if (!(input = HeapAlloc( GetProcessHeap(), 0, i_size )))
1045     {
1046         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1047         goto err_ret;
1048     }
1049
1050     if (!(output = HeapAlloc( GetProcessHeap(), 0, o_size )))
1051     {
1052         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1053         goto err_ret;
1054     }
1055
1056     /* construct the symlink name as "\DosDevices\C:" */
1057     lstrcpyW( symlink_name, prefixW );
1058     lstrcatW( symlink_name, path );
1059     symlink_name[lstrlenW(symlink_name)-1] = 0;
1060
1061     /* Take the mount point and get the "nonpersistent name" */
1062     /* We will then take that and get the volume name        */
1063     nonpersist_name = (WCHAR *)(input + 1);
1064     status = read_nt_symlink( symlink_name, nonpersist_name, i_size - sizeof(*input) );
1065     TRACE("read_nt_symlink got stat=%x, for %s, got <%s>\n", status,
1066             debugstr_w(symlink_name), debugstr_w(nonpersist_name));
1067     if (status != STATUS_SUCCESS)
1068     {
1069         SetLastError( ERROR_FILE_NOT_FOUND );
1070         goto err_ret;
1071     }
1072
1073     /* Now take the "nonpersistent name" and ask the mountmgr  */
1074     /* to give us all the mount points.  One of them will be   */
1075     /* the volume name  (format of \??\Volume{).               */
1076     memset( input, 0, sizeof(*input) );  /* clear all input parameters */
1077     input->DeviceNameOffset = sizeof(*input);
1078     input->DeviceNameLength = lstrlenW( nonpersist_name) * sizeof(WCHAR);
1079     i_size = input->DeviceNameOffset + input->DeviceNameLength;
1080
1081     output->Size = o_size;
1082
1083     /* now get the true volume name from the mountmgr   */
1084     if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, input, i_size,
1085                         output, o_size, &br, NULL ))
1086         goto err_ret;
1087
1088     /* Verify and return the data, note string is not null terminated  */
1089     TRACE("found %d matching mount points\n", output->NumberOfMountPoints);
1090     if (output->NumberOfMountPoints < 1)
1091     {
1092         SetLastError( ERROR_NO_VOLUME_ID );
1093         goto err_ret;
1094     }
1095     o1 = &output->MountPoints[0];
1096
1097     /* look for the volume name in returned values  */
1098     for(i=0;i<output->NumberOfMountPoints;i++)
1099     {
1100         p = (WCHAR*)((char *)output + o1->SymbolicLinkNameOffset);
1101         r = (char *)output + o1->UniqueIdOffset;
1102         TRACE("found symlink=%s, unique=%s, devname=%s\n",
1103             debugstr_wn(p, o1->SymbolicLinkNameLength/sizeof(WCHAR)),
1104             debugstr_an(r, o1->UniqueIdLength),
1105             debugstr_wn((WCHAR*)((char *)output + o1->DeviceNameOffset),
1106                             o1->DeviceNameLength/sizeof(WCHAR)));
1107
1108         if (!strncmpW( p, volumeW, sizeof(volumeW)/sizeof(WCHAR) ))
1109         {
1110             /* is there space in the return variable ?? */
1111             if ((o1->SymbolicLinkNameLength/sizeof(WCHAR))+2 > size)
1112             {
1113                 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1114                 goto err_ret;
1115             }
1116             memcpy( volume, p, o1->SymbolicLinkNameLength );
1117             volume[o1->SymbolicLinkNameLength / sizeof(WCHAR)] = 0;
1118             lstrcatW( volume, trailingW );
1119             /* change second char from '?' to '\'  */
1120             volume[1] = '\\';
1121             ret = TRUE;
1122             break;
1123         }
1124         o1++;
1125     }
1126
1127 err_ret:
1128     HeapFree( GetProcessHeap(), 0, input );
1129     HeapFree( GetProcessHeap(), 0, output );
1130     CloseHandle( mgr );
1131     return ret;
1132 }
1133
1134 /***********************************************************************
1135  *           DefineDosDeviceW       (KERNEL32.@)
1136  */
1137 BOOL WINAPI DefineDosDeviceW( DWORD flags, LPCWSTR devname, LPCWSTR targetpath )
1138 {
1139     DWORD len, dosdev;
1140     BOOL ret = FALSE;
1141     char *path = NULL, *target, *p;
1142
1143     TRACE("%x, %s, %s\n", flags, debugstr_w(devname), debugstr_w(targetpath));
1144
1145     if (!(flags & DDD_REMOVE_DEFINITION))
1146     {
1147         if (!(flags & DDD_RAW_TARGET_PATH))
1148         {
1149             FIXME( "(0x%08x,%s,%s) DDD_RAW_TARGET_PATH flag not set, not supported yet\n",
1150                    flags, debugstr_w(devname), debugstr_w(targetpath) );
1151             SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1152             return FALSE;
1153         }
1154
1155         len = WideCharToMultiByte( CP_UNIXCP, 0, targetpath, -1, NULL, 0, NULL, NULL );
1156         if ((target = HeapAlloc( GetProcessHeap(), 0, len )))
1157         {
1158             WideCharToMultiByte( CP_UNIXCP, 0, targetpath, -1, target, len, NULL, NULL );
1159             for (p = target; *p; p++) if (*p == '\\') *p = '/';
1160         }
1161         else
1162         {
1163             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1164             return FALSE;
1165         }
1166     }
1167     else target = NULL;
1168
1169     /* first check for a DOS device */
1170
1171     if ((dosdev = RtlIsDosDeviceName_U( devname )))
1172     {
1173         WCHAR name[5];
1174
1175         memcpy( name, devname + HIWORD(dosdev)/sizeof(WCHAR), LOWORD(dosdev) );
1176         name[LOWORD(dosdev)/sizeof(WCHAR)] = 0;
1177         path = get_dos_device_path( name );
1178     }
1179     else if (isalphaW(devname[0]) && devname[1] == ':' && !devname[2])  /* drive mapping */
1180     {
1181         path = get_dos_device_path( devname );
1182     }
1183     else SetLastError( ERROR_FILE_NOT_FOUND );
1184
1185     if (path)
1186     {
1187         if (target)
1188         {
1189             TRACE( "creating symlink %s -> %s\n", path, target );
1190             unlink( path );
1191             if (!symlink( target, path )) ret = TRUE;
1192             else FILE_SetDosError();
1193         }
1194         else
1195         {
1196             TRACE( "removing symlink %s\n", path );
1197             if (!unlink( path )) ret = TRUE;
1198             else FILE_SetDosError();
1199         }
1200         HeapFree( GetProcessHeap(), 0, path );
1201     }
1202     HeapFree( GetProcessHeap(), 0, target );
1203     return ret;
1204 }
1205
1206
1207 /***********************************************************************
1208  *           DefineDosDeviceA       (KERNEL32.@)
1209  */
1210 BOOL WINAPI DefineDosDeviceA(DWORD flags, LPCSTR devname, LPCSTR targetpath)
1211 {
1212     WCHAR *devW, *targetW = NULL;
1213     BOOL ret;
1214
1215     if (!(devW = FILE_name_AtoW( devname, FALSE ))) return FALSE;
1216     if (targetpath && !(targetW = FILE_name_AtoW( targetpath, TRUE ))) return FALSE;
1217     ret = DefineDosDeviceW(flags, devW, targetW);
1218     HeapFree( GetProcessHeap(), 0, targetW );
1219     return ret;
1220 }
1221
1222
1223 /***********************************************************************
1224  *           QueryDosDeviceW   (KERNEL32.@)
1225  *
1226  * returns array of strings terminated by \0, terminated by \0
1227  */
1228 DWORD WINAPI QueryDosDeviceW( LPCWSTR devname, LPWSTR target, DWORD bufsize )
1229 {
1230     static const WCHAR dosdevW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\',0};
1231
1232     UNICODE_STRING nt_name;
1233     NTSTATUS status;
1234
1235     if (!bufsize)
1236     {
1237         SetLastError( ERROR_INSUFFICIENT_BUFFER );
1238         return 0;
1239     }
1240
1241     if (devname)
1242     {
1243         WCHAR name[8];
1244         WCHAR *buffer;
1245         DWORD dosdev, ret = 0;
1246
1247         if ((dosdev = RtlIsDosDeviceName_U( devname )))
1248         {
1249             memcpy( name, devname + HIWORD(dosdev)/sizeof(WCHAR), LOWORD(dosdev) );
1250             name[LOWORD(dosdev)/sizeof(WCHAR)] = 0;
1251             devname = name;
1252         }
1253
1254         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, sizeof(dosdevW) + strlenW(devname)*sizeof(WCHAR) )))
1255         {
1256             SetLastError( ERROR_OUTOFMEMORY );
1257             return 0;
1258         }
1259         memcpy( buffer, dosdevW, sizeof(dosdevW) );
1260         strcatW( buffer, devname );
1261         status = read_nt_symlink( buffer, target, bufsize );
1262         HeapFree( GetProcessHeap(), 0, buffer );
1263         if (status)
1264         {
1265             SetLastError( RtlNtStatusToDosError(status) );
1266             return 0;
1267         }
1268         ret = strlenW( target ) + 1;
1269         if (ret < bufsize) target[ret++] = 0;  /* add an extra null */
1270         return ret;
1271     }
1272     else  /* return a list of all devices */
1273     {
1274         OBJECT_ATTRIBUTES attr;
1275         HANDLE handle;
1276         WCHAR *p = target;
1277
1278         RtlInitUnicodeString( &nt_name, dosdevW );
1279         nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
1280         attr.Length = sizeof(attr);
1281         attr.RootDirectory = 0;
1282         attr.ObjectName = &nt_name;
1283         attr.Attributes = OBJ_CASE_INSENSITIVE;
1284         attr.SecurityDescriptor = NULL;
1285         attr.SecurityQualityOfService = NULL;
1286         status = NtOpenDirectoryObject( &handle, FILE_LIST_DIRECTORY, &attr );
1287         if (!status)
1288         {
1289             char data[1024];
1290             DIRECTORY_BASIC_INFORMATION *info = (DIRECTORY_BASIC_INFORMATION *)data;
1291             ULONG ctx = 0, len;
1292
1293             while (!NtQueryDirectoryObject( handle, info, sizeof(data), 1, 0, &ctx, &len ))
1294             {
1295                 if (p + info->ObjectName.Length/sizeof(WCHAR) + 1 >= target + bufsize)
1296                 {
1297                     SetLastError( ERROR_INSUFFICIENT_BUFFER );
1298                     NtClose( handle );
1299                     return 0;
1300                 }
1301                 memcpy( p, info->ObjectName.Buffer, info->ObjectName.Length );
1302                 p += info->ObjectName.Length/sizeof(WCHAR);
1303                 *p++ = 0;
1304             }
1305             NtClose( handle );
1306         }
1307
1308         *p++ = 0;  /* terminating null */
1309         return p - target;
1310     }
1311 }
1312
1313
1314 /***********************************************************************
1315  *           QueryDosDeviceA   (KERNEL32.@)
1316  *
1317  * returns array of strings terminated by \0, terminated by \0
1318  */
1319 DWORD WINAPI QueryDosDeviceA( LPCSTR devname, LPSTR target, DWORD bufsize )
1320 {
1321     DWORD ret = 0, retW;
1322     WCHAR *devnameW = NULL;
1323     LPWSTR targetW;
1324
1325     if (devname && !(devnameW = FILE_name_AtoW( devname, FALSE ))) return 0;
1326
1327     targetW = HeapAlloc( GetProcessHeap(),0, bufsize * sizeof(WCHAR) );
1328     if (!targetW)
1329     {
1330         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1331         return 0;
1332     }
1333
1334     retW = QueryDosDeviceW(devnameW, targetW, bufsize);
1335
1336     ret = FILE_name_WtoA( targetW, retW, target, bufsize );
1337
1338     HeapFree(GetProcessHeap(), 0, targetW);
1339     return ret;
1340 }
1341
1342
1343 /***********************************************************************
1344  *           GetLogicalDrives   (KERNEL32.@)
1345  */
1346 DWORD WINAPI GetLogicalDrives(void)
1347 {
1348     static const WCHAR dosdevW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\',0};
1349     OBJECT_ATTRIBUTES attr;
1350     UNICODE_STRING nt_name;
1351     DWORD bitmask = 0;
1352     NTSTATUS status;
1353     HANDLE handle;
1354
1355     RtlInitUnicodeString( &nt_name, dosdevW );
1356     nt_name.Length -= sizeof(WCHAR);  /* without trailing slash */
1357     attr.Length = sizeof(attr);
1358     attr.RootDirectory = 0;
1359     attr.ObjectName = &nt_name;
1360     attr.Attributes = OBJ_CASE_INSENSITIVE;
1361     attr.SecurityDescriptor = NULL;
1362     attr.SecurityQualityOfService = NULL;
1363     status = NtOpenDirectoryObject( &handle, FILE_LIST_DIRECTORY, &attr );
1364     if (!status)
1365     {
1366         char data[1024];
1367         DIRECTORY_BASIC_INFORMATION *info = (DIRECTORY_BASIC_INFORMATION *)data;
1368         ULONG ctx = 0, len;
1369
1370         while (!NtQueryDirectoryObject( handle, info, sizeof(data), 1, 0, &ctx, &len ))
1371             if(info->ObjectName.Length == 2*sizeof(WCHAR) && info->ObjectName.Buffer[1] == ':')
1372                 bitmask |= 1 << (info->ObjectName.Buffer[0] - 'A');
1373
1374         NtClose( handle );
1375     }
1376
1377     return bitmask;
1378 }
1379
1380
1381 /***********************************************************************
1382  *           GetLogicalDriveStringsA   (KERNEL32.@)
1383  */
1384 UINT WINAPI GetLogicalDriveStringsA( UINT len, LPSTR buffer )
1385 {
1386     DWORD drives = GetLogicalDrives();
1387     UINT drive, count;
1388
1389     for (drive = count = 0; drive < 26; drive++) if (drives & (1 << drive)) count++;
1390     if ((count * 4) + 1 > len) return count * 4 + 1;
1391
1392     for (drive = 0; drive < 26; drive++)
1393     {
1394         if (drives & (1 << drive))
1395         {
1396             *buffer++ = 'A' + drive;
1397             *buffer++ = ':';
1398             *buffer++ = '\\';
1399             *buffer++ = 0;
1400         }
1401     }
1402     *buffer = 0;
1403     return count * 4;
1404 }
1405
1406
1407 /***********************************************************************
1408  *           GetLogicalDriveStringsW   (KERNEL32.@)
1409  */
1410 UINT WINAPI GetLogicalDriveStringsW( UINT len, LPWSTR buffer )
1411 {
1412     DWORD drives = GetLogicalDrives();
1413     UINT drive, count;
1414
1415     for (drive = count = 0; drive < 26; drive++) if (drives & (1 << drive)) count++;
1416     if ((count * 4) + 1 > len) return count * 4 + 1;
1417
1418     for (drive = 0; drive < 26; drive++)
1419     {
1420         if (drives & (1 << drive))
1421         {
1422             *buffer++ = 'A' + drive;
1423             *buffer++ = ':';
1424             *buffer++ = '\\';
1425             *buffer++ = 0;
1426         }
1427     }
1428     *buffer = 0;
1429     return count * 4;
1430 }
1431
1432
1433 /***********************************************************************
1434  *           GetDriveTypeW   (KERNEL32.@)
1435  *
1436  * Returns the type of the disk drive specified. If root is NULL the
1437  * root of the current directory is used.
1438  *
1439  * RETURNS
1440  *
1441  *  Type of drive (from Win32 SDK):
1442  *
1443  *   DRIVE_UNKNOWN     unable to find out anything about the drive
1444  *   DRIVE_NO_ROOT_DIR nonexistent root dir
1445  *   DRIVE_REMOVABLE   the disk can be removed from the machine
1446  *   DRIVE_FIXED       the disk cannot be removed from the machine
1447  *   DRIVE_REMOTE      network disk
1448  *   DRIVE_CDROM       CDROM drive
1449  *   DRIVE_RAMDISK     virtual disk in RAM
1450  */
1451 UINT WINAPI GetDriveTypeW(LPCWSTR root) /* [in] String describing drive */
1452 {
1453     FILE_FS_DEVICE_INFORMATION info;
1454     IO_STATUS_BLOCK io;
1455     NTSTATUS status;
1456     HANDLE handle;
1457     UINT ret;
1458
1459     if (!open_device_root( root, &handle ))
1460     {
1461         /* CD ROM devices do not necessarily have a volume, but a drive type */
1462         ret = get_mountmgr_drive_type( root );
1463         if (ret == DRIVE_CDROM || ret == DRIVE_REMOVABLE)
1464             return ret;
1465
1466         return DRIVE_NO_ROOT_DIR;
1467     }
1468
1469     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsDeviceInformation );
1470     NtClose( handle );
1471     if (status != STATUS_SUCCESS)
1472     {
1473         SetLastError( RtlNtStatusToDosError(status) );
1474         ret = DRIVE_UNKNOWN;
1475     }
1476     else
1477     {
1478         switch (info.DeviceType)
1479         {
1480         case FILE_DEVICE_CD_ROM_FILE_SYSTEM:  ret = DRIVE_CDROM; break;
1481         case FILE_DEVICE_VIRTUAL_DISK:        ret = DRIVE_RAMDISK; break;
1482         case FILE_DEVICE_NETWORK_FILE_SYSTEM: ret = DRIVE_REMOTE; break;
1483         case FILE_DEVICE_DISK_FILE_SYSTEM:
1484             if (info.Characteristics & FILE_REMOTE_DEVICE) ret = DRIVE_REMOTE;
1485             else if (info.Characteristics & FILE_REMOVABLE_MEDIA) ret = DRIVE_REMOVABLE;
1486             else if ((ret = get_mountmgr_drive_type( root )) == DRIVE_UNKNOWN) ret = DRIVE_FIXED;
1487             break;
1488         default:
1489             ret = DRIVE_UNKNOWN;
1490             break;
1491         }
1492     }
1493     TRACE( "%s -> %d\n", debugstr_w(root), ret );
1494     return ret;
1495 }
1496
1497
1498 /***********************************************************************
1499  *           GetDriveTypeA   (KERNEL32.@)
1500  *
1501  * See GetDriveTypeW.
1502  */
1503 UINT WINAPI GetDriveTypeA( LPCSTR root )
1504 {
1505     WCHAR *rootW = NULL;
1506
1507     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return DRIVE_NO_ROOT_DIR;
1508     return GetDriveTypeW( rootW );
1509 }
1510
1511
1512 /***********************************************************************
1513  *           GetDiskFreeSpaceExW   (KERNEL32.@)
1514  *
1515  *  This function is used to acquire the size of the available and
1516  *  total space on a logical volume.
1517  *
1518  * RETURNS
1519  *
1520  *  Zero on failure, nonzero upon success. Use GetLastError to obtain
1521  *  detailed error information.
1522  *
1523  */
1524 BOOL WINAPI GetDiskFreeSpaceExW( LPCWSTR root, PULARGE_INTEGER avail,
1525                                  PULARGE_INTEGER total, PULARGE_INTEGER totalfree )
1526 {
1527     FILE_FS_SIZE_INFORMATION info;
1528     IO_STATUS_BLOCK io;
1529     NTSTATUS status;
1530     HANDLE handle;
1531     UINT units;
1532
1533     TRACE( "%s,%p,%p,%p\n", debugstr_w(root), avail, total, totalfree );
1534
1535     if (!open_device_root( root, &handle )) return FALSE;
1536
1537     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsSizeInformation );
1538     NtClose( handle );
1539     if (status != STATUS_SUCCESS)
1540     {
1541         SetLastError( RtlNtStatusToDosError(status) );
1542         return FALSE;
1543     }
1544
1545     units = info.SectorsPerAllocationUnit * info.BytesPerSector;
1546     if (total) total->QuadPart = info.TotalAllocationUnits.QuadPart * units;
1547     if (totalfree) totalfree->QuadPart = info.AvailableAllocationUnits.QuadPart * units;
1548     /* FIXME: this one should take quotas into account */
1549     if (avail) avail->QuadPart = info.AvailableAllocationUnits.QuadPart * units;
1550     return TRUE;
1551 }
1552
1553
1554 /***********************************************************************
1555  *           GetDiskFreeSpaceExA   (KERNEL32.@)
1556  *
1557  * See GetDiskFreeSpaceExW.
1558  */
1559 BOOL WINAPI GetDiskFreeSpaceExA( LPCSTR root, PULARGE_INTEGER avail,
1560                                  PULARGE_INTEGER total, PULARGE_INTEGER totalfree )
1561 {
1562     WCHAR *rootW = NULL;
1563
1564     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
1565     return GetDiskFreeSpaceExW( rootW, avail, total, totalfree );
1566 }
1567
1568
1569 /***********************************************************************
1570  *           GetDiskFreeSpaceW   (KERNEL32.@)
1571  */
1572 BOOL WINAPI GetDiskFreeSpaceW( LPCWSTR root, LPDWORD cluster_sectors,
1573                                LPDWORD sector_bytes, LPDWORD free_clusters,
1574                                LPDWORD total_clusters )
1575 {
1576     FILE_FS_SIZE_INFORMATION info;
1577     IO_STATUS_BLOCK io;
1578     NTSTATUS status;
1579     HANDLE handle;
1580     UINT units;
1581
1582     TRACE( "%s,%p,%p,%p,%p\n", debugstr_w(root),
1583            cluster_sectors, sector_bytes, free_clusters, total_clusters );
1584
1585     if (!open_device_root( root, &handle )) return FALSE;
1586
1587     status = NtQueryVolumeInformationFile( handle, &io, &info, sizeof(info), FileFsSizeInformation );
1588     NtClose( handle );
1589     if (status != STATUS_SUCCESS)
1590     {
1591         SetLastError( RtlNtStatusToDosError(status) );
1592         return FALSE;
1593     }
1594
1595     units = info.SectorsPerAllocationUnit * info.BytesPerSector;
1596
1597     if( GetVersion() & 0x80000000) {    /* win3.x, 9x, ME */
1598         /* cap the size and available at 2GB as per specs */
1599         if (info.TotalAllocationUnits.QuadPart * units > 0x7fffffff) {
1600             info.TotalAllocationUnits.QuadPart = 0x7fffffff / units;
1601             if (info.AvailableAllocationUnits.QuadPart * units > 0x7fffffff)
1602                 info.AvailableAllocationUnits.QuadPart = 0x7fffffff / units;
1603         }
1604         /* nr. of clusters is always <= 65335 */
1605         while( info.TotalAllocationUnits.QuadPart > 65535 ) {
1606             info.TotalAllocationUnits.QuadPart /= 2;
1607             info.AvailableAllocationUnits.QuadPart /= 2;
1608             info.SectorsPerAllocationUnit *= 2;
1609         }
1610     }
1611
1612     if (cluster_sectors) *cluster_sectors = info.SectorsPerAllocationUnit;
1613     if (sector_bytes) *sector_bytes = info.BytesPerSector;
1614     if (free_clusters) *free_clusters = info.AvailableAllocationUnits.u.LowPart;
1615     if (total_clusters) *total_clusters = info.TotalAllocationUnits.u.LowPart;
1616     TRACE("%#08x, %#08x, %#08x, %#08x\n", info.SectorsPerAllocationUnit, info.BytesPerSector,
1617           info.AvailableAllocationUnits.u.LowPart, info.TotalAllocationUnits.u.LowPart);
1618     return TRUE;
1619 }
1620
1621
1622 /***********************************************************************
1623  *           GetDiskFreeSpaceA   (KERNEL32.@)
1624  */
1625 BOOL WINAPI GetDiskFreeSpaceA( LPCSTR root, LPDWORD cluster_sectors,
1626                                LPDWORD sector_bytes, LPDWORD free_clusters,
1627                                LPDWORD total_clusters )
1628 {
1629     WCHAR *rootW = NULL;
1630
1631     if (root && !(rootW = FILE_name_AtoW( root, FALSE ))) return FALSE;
1632     return GetDiskFreeSpaceW( rootW, cluster_sectors, sector_bytes, free_clusters, total_clusters );
1633 }
1634
1635 /***********************************************************************
1636  *           GetVolumePathNameA   (KERNEL32.@)
1637  */
1638 BOOL WINAPI GetVolumePathNameA(LPCSTR filename, LPSTR volumepathname, DWORD buflen)
1639 {
1640     BOOL ret;
1641     WCHAR *filenameW = NULL, *volumeW = NULL;
1642
1643     TRACE("(%s, %p, %d)\n", debugstr_a(filename), volumepathname, buflen);
1644
1645     if (filename && !(filenameW = FILE_name_AtoW( filename, FALSE )))
1646         return FALSE;
1647     if (volumepathname && !(volumeW = HeapAlloc( GetProcessHeap(), 0, buflen * sizeof(WCHAR) )))
1648         return FALSE;
1649
1650     if ((ret = GetVolumePathNameW( filenameW, volumeW, buflen )))
1651         FILE_name_WtoA( volumeW, -1, volumepathname, buflen );
1652
1653     HeapFree( GetProcessHeap(), 0, volumeW );
1654     return ret;
1655 }
1656
1657 /***********************************************************************
1658  *           GetVolumePathNameW   (KERNEL32.@)
1659  *
1660  * This routine is intended to find the most basic path on the same filesystem
1661  * for any particular path name.  Since we can have very complicated drive/path
1662  * relationships on Unix systems, due to symbolic links, the safest way to
1663  * handle this is to start with the full path and work our way back folder by
1664  * folder unil we find a folder on a different drive (or run out of folders).
1665  */
1666 BOOL WINAPI GetVolumePathNameW(LPCWSTR filename, LPWSTR volumepathname, DWORD buflen)
1667 {
1668     static const WCHAR deviceprefixW[] = { '\\','?','?','\\',0 };
1669     static const WCHAR ntprefixW[] = { '\\','\\','?','\\',0 };
1670     WCHAR fallbackpathW[] = { 'C',':','\\',0 };
1671     NTSTATUS status = STATUS_SUCCESS;
1672     WCHAR *volumenameW = NULL, *c;
1673     int pos, last_pos, stop_pos;
1674     UNICODE_STRING nt_name;
1675     ANSI_STRING unix_name;
1676     BOOL first_run = TRUE;
1677     dev_t search_dev = 0;
1678     struct stat st;
1679
1680     TRACE("(%s, %p, %d)\n", debugstr_w(filename), volumepathname, buflen);
1681
1682     if (!filename || !volumepathname || !buflen)
1683     {
1684         SetLastError(ERROR_INVALID_PARAMETER);
1685         return FALSE;
1686     }
1687
1688     last_pos = pos = strlenW( filename );
1689     /* allocate enough memory for searching the path (need room for a slash and a NULL terminator) */
1690     if (!(volumenameW = HeapAlloc( GetProcessHeap(), 0, (pos + 2) * sizeof(WCHAR) )))
1691     {
1692         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1693         return FALSE;
1694     }
1695     strcpyW( volumenameW, filename );
1696     stop_pos = 0;
1697     /* stop searching slashes early for NT-type and nearly NT-type paths */
1698     if (strncmpW(ntprefixW, filename, strlenW(ntprefixW)) == 0)
1699         stop_pos = strlenW(ntprefixW)-1;
1700     else if (strncmpW(ntprefixW, filename, 2) == 0)
1701         stop_pos = 2;
1702
1703     do
1704     {
1705         volumenameW[pos+0] = '\\';
1706         volumenameW[pos+1] = '\0';
1707         if (!RtlDosPathNameToNtPathName_U( volumenameW, &nt_name, NULL, NULL ))
1708             goto cleanup;
1709         volumenameW[pos] = '\0';
1710         status = wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, FALSE );
1711         RtlFreeUnicodeString( &nt_name );
1712         if (status == STATUS_SUCCESS)
1713         {
1714             if (stat( unix_name.Buffer, &st ) != 0)
1715             {
1716                 RtlFreeAnsiString( &unix_name );
1717                 status = STATUS_OBJECT_NAME_INVALID;
1718                 goto cleanup;
1719             }
1720             if (first_run)
1721             {
1722                 first_run = FALSE;
1723                 search_dev = st.st_dev;
1724             }
1725             else if (st.st_dev != search_dev)
1726             {
1727                 /* folder is on a new filesystem, return the last folder */
1728                 RtlFreeAnsiString( &unix_name );
1729                 break;
1730             }
1731         }
1732         RtlFreeAnsiString( &unix_name );
1733         last_pos = pos;
1734         c = strrchrW( volumenameW, '\\' );
1735         if (c != NULL)
1736             pos = c-volumenameW;
1737     } while (c != NULL && pos > stop_pos);
1738
1739     if (status != STATUS_SUCCESS)
1740     {
1741         WCHAR cwdW[MAX_PATH];
1742
1743         /* the path was completely invalid */
1744         if (filename[0] == '\\' && strncmpW(deviceprefixW, filename, strlenW(deviceprefixW)) != 0)
1745         {
1746             /* NT-style paths (that are not device paths) fail */
1747             status = STATUS_OBJECT_NAME_INVALID;
1748             goto cleanup;
1749         }
1750
1751         /* DOS-style paths (anything not beginning with a slash) have fallback replies */
1752         if (filename[1] == ':')
1753         {
1754             /* if the path is semi-sane (X:) then use the given drive letter (if it is mounted) */
1755             fallbackpathW[0] = filename[0];
1756             if (!isalphaW(filename[0]) || GetDriveTypeW( fallbackpathW ) == DRIVE_NO_ROOT_DIR)
1757             {
1758                 status = STATUS_OBJECT_NAME_NOT_FOUND;
1759                 goto cleanup;
1760             }
1761         }
1762         else if (GetCurrentDirectoryW( sizeof(cwdW)/sizeof(cwdW[0]), cwdW ))
1763         {
1764             /* if the path is completely bogus then revert to the drive of the working directory */
1765             fallbackpathW[0] = cwdW[0];
1766         }
1767         else
1768         {
1769             status = STATUS_OBJECT_NAME_INVALID;
1770             goto cleanup;
1771         }
1772         last_pos = strlenW(fallbackpathW) - 1; /* points to \\ */
1773         filename = fallbackpathW;
1774         status = STATUS_SUCCESS;
1775     }
1776
1777     if (last_pos + 1 <= buflen)
1778     {
1779         WCHAR *p;
1780         memcpy(volumepathname, filename, last_pos * sizeof(WCHAR));
1781         if (last_pos + 2 <= buflen) volumepathname[last_pos++] = '\\';
1782         volumepathname[last_pos] = '\0';
1783
1784         /* Normalize path */
1785         for (p = volumepathname; *p; p++) if (*p == '/') *p = '\\';
1786
1787         /* DOS-style paths always return upper-case drive letters */
1788         if (volumepathname[1] == ':')
1789             volumepathname[0] = toupperW(volumepathname[0]);
1790
1791         TRACE("Successfully translated path %s to mount-point %s\n",
1792               debugstr_w(filename), debugstr_w(volumepathname));
1793     }
1794     else
1795         status = STATUS_NAME_TOO_LONG;
1796
1797 cleanup:
1798     HeapFree( GetProcessHeap(), 0, volumenameW );
1799
1800     if (status != STATUS_SUCCESS)
1801         SetLastError( RtlNtStatusToDosError(status) );
1802     return (status == STATUS_SUCCESS);
1803 }
1804
1805
1806 /***********************************************************************
1807  *           GetVolumePathNamesForVolumeNameA   (KERNEL32.@)
1808  */
1809 BOOL WINAPI GetVolumePathNamesForVolumeNameA(LPCSTR volumename, LPSTR volumepathname, DWORD buflen, PDWORD returnlen)
1810 {
1811     BOOL ret;
1812     WCHAR *volumenameW = NULL, *volumepathnameW;
1813
1814     if (volumename && !(volumenameW = FILE_name_AtoW( volumename, TRUE ))) return FALSE;
1815     if (!(volumepathnameW = HeapAlloc( GetProcessHeap(), 0, buflen * sizeof(WCHAR) )))
1816     {
1817         HeapFree( GetProcessHeap(), 0, volumenameW );
1818         return FALSE;
1819     }
1820     if ((ret = GetVolumePathNamesForVolumeNameW( volumenameW, volumepathnameW, buflen, returnlen )))
1821     {
1822         char *path = volumepathname;
1823         const WCHAR *pathW = volumepathnameW;
1824
1825         while (*pathW)
1826         {
1827             int len = strlenW( pathW ) + 1;
1828             FILE_name_WtoA( pathW, len, path, buflen );
1829             buflen -= len;
1830             pathW += len;
1831             path += len;
1832         }
1833         path[0] = 0;
1834     }
1835     HeapFree( GetProcessHeap(), 0, volumenameW );
1836     HeapFree( GetProcessHeap(), 0, volumepathnameW );
1837     return ret;
1838 }
1839
1840 static MOUNTMGR_MOUNT_POINTS *query_mount_points( HANDLE mgr, MOUNTMGR_MOUNT_POINT *input, DWORD insize )
1841 {
1842     MOUNTMGR_MOUNT_POINTS *output;
1843     DWORD outsize = 1024;
1844     DWORD br;
1845
1846     for (;;)
1847     {
1848         if (!(output = HeapAlloc( GetProcessHeap(), 0, outsize )))
1849         {
1850             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
1851             return NULL;
1852         }
1853         if (DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, input, insize, output, outsize, &br, NULL )) break;
1854         outsize = output->Size;
1855         HeapFree( GetProcessHeap(), 0, output );
1856         if (GetLastError() != ERROR_MORE_DATA) return NULL;
1857     }
1858     return output;
1859 }
1860 /***********************************************************************
1861  *           GetVolumePathNamesForVolumeNameW   (KERNEL32.@)
1862  */
1863 BOOL WINAPI GetVolumePathNamesForVolumeNameW(LPCWSTR volumename, LPWSTR volumepathname, DWORD buflen, PDWORD returnlen)
1864 {
1865     static const WCHAR dosdevicesW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\'};
1866     HANDLE mgr;
1867     DWORD len, size;
1868     MOUNTMGR_MOUNT_POINT *spec;
1869     MOUNTMGR_MOUNT_POINTS *link, *target = NULL;
1870     WCHAR *name, *path;
1871     BOOL ret = FALSE;
1872     UINT i, j;
1873
1874     TRACE("%s, %p, %u, %p\n", debugstr_w(volumename), volumepathname, buflen, returnlen);
1875
1876     if (!volumename || (len = strlenW( volumename )) != 49)
1877     {
1878         SetLastError( ERROR_INVALID_NAME );
1879         return FALSE;
1880     }
1881     mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 );
1882     if (mgr == INVALID_HANDLE_VALUE) return FALSE;
1883
1884     size = sizeof(*spec) + sizeof(WCHAR) * (len - 1); /* remove trailing backslash */
1885     if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
1886     spec->SymbolicLinkNameOffset = sizeof(*spec);
1887     spec->SymbolicLinkNameLength = size - sizeof(*spec);
1888     name = (WCHAR *)((char *)spec + spec->SymbolicLinkNameOffset);
1889     memcpy( name, volumename, size - sizeof(*spec) );
1890     name[1] = '?'; /* map \\?\ to \??\ */
1891
1892     target = query_mount_points( mgr, spec, size );
1893     HeapFree( GetProcessHeap(), 0, spec );
1894     if (!target)
1895     {
1896         goto done;
1897     }
1898     if (!target->NumberOfMountPoints)
1899     {
1900         SetLastError( ERROR_FILE_NOT_FOUND );
1901         goto done;
1902     }
1903     len = 0;
1904     path = volumepathname;
1905     for (i = 0; i < target->NumberOfMountPoints; i++)
1906     {
1907         link = NULL;
1908         if (target->MountPoints[i].DeviceNameOffset)
1909         {
1910             const WCHAR *device = (const WCHAR *)((const char *)target + target->MountPoints[i].DeviceNameOffset);
1911             USHORT device_len = target->MountPoints[i].DeviceNameLength;
1912
1913             size = sizeof(*spec) + device_len;
1914             if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
1915             spec->DeviceNameOffset = sizeof(*spec);
1916             spec->DeviceNameLength = device_len;
1917             memcpy( (char *)spec + spec->DeviceNameOffset, device, device_len );
1918
1919             link = query_mount_points( mgr, spec, size );
1920             HeapFree( GetProcessHeap(), 0, spec );
1921         }
1922         else if (target->MountPoints[i].UniqueIdOffset)
1923         {
1924             const WCHAR *id = (const WCHAR *)((const char *)target + target->MountPoints[i].UniqueIdOffset);
1925             USHORT id_len = target->MountPoints[i].UniqueIdLength;
1926
1927             size = sizeof(*spec) + id_len;
1928             if (!(spec = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size ))) goto done;
1929             spec->UniqueIdOffset = sizeof(*spec);
1930             spec->UniqueIdLength = id_len;
1931             memcpy( (char *)spec + spec->UniqueIdOffset, id, id_len );
1932
1933             link = query_mount_points( mgr, spec, size );
1934             HeapFree( GetProcessHeap(), 0, spec );
1935         }
1936         if (!link) continue;
1937         for (j = 0; j < link->NumberOfMountPoints; j++)
1938         {
1939             const WCHAR *linkname;
1940
1941             if (!link->MountPoints[j].SymbolicLinkNameOffset) continue;
1942             linkname = (const WCHAR *)((const char *)link + link->MountPoints[j].SymbolicLinkNameOffset);
1943
1944             if (link->MountPoints[j].SymbolicLinkNameLength == sizeof(dosdevicesW) + 2 * sizeof(WCHAR) &&
1945                 !memicmpW( linkname, dosdevicesW, sizeof(dosdevicesW) / sizeof(WCHAR) ))
1946             {
1947                 len += 4;
1948                 if (volumepathname && len < buflen)
1949                 {
1950                     path[0] = linkname[sizeof(dosdevicesW) / sizeof(WCHAR)];
1951                     path[1] = ':';
1952                     path[2] = '\\';
1953                     path[3] = 0;
1954                     path += 4;
1955                 }
1956             }
1957         }
1958         HeapFree( GetProcessHeap(), 0, link );
1959     }
1960     if (buflen <= len) SetLastError( ERROR_MORE_DATA );
1961     else if (volumepathname)
1962     {
1963         volumepathname[len] = 0;
1964         ret = TRUE;
1965     }
1966     if (returnlen) *returnlen = len + 1;
1967
1968 done:
1969     HeapFree( GetProcessHeap(), 0, target );
1970     CloseHandle( mgr );
1971     return ret;
1972 }
1973
1974 /***********************************************************************
1975  *           FindFirstVolumeA   (KERNEL32.@)
1976  */
1977 HANDLE WINAPI FindFirstVolumeA(LPSTR volume, DWORD len)
1978 {
1979     WCHAR *buffer = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
1980     HANDLE handle = FindFirstVolumeW( buffer, len );
1981
1982     if (handle != INVALID_HANDLE_VALUE)
1983     {
1984         if (!WideCharToMultiByte( CP_ACP, 0, buffer, -1, volume, len, NULL, NULL ))
1985         {
1986             FindVolumeClose( handle );
1987             handle = INVALID_HANDLE_VALUE;
1988         }
1989     }
1990     HeapFree( GetProcessHeap(), 0, buffer );
1991     return handle;
1992 }
1993
1994 /***********************************************************************
1995  *           FindFirstVolumeW   (KERNEL32.@)
1996  */
1997 HANDLE WINAPI FindFirstVolumeW( LPWSTR volume, DWORD len )
1998 {
1999     DWORD size = 1024;
2000     DWORD br;
2001     HANDLE mgr = CreateFileW( MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE,
2002                               NULL, OPEN_EXISTING, 0, 0 );
2003     if (mgr == INVALID_HANDLE_VALUE) return INVALID_HANDLE_VALUE;
2004
2005     for (;;)
2006     {
2007         MOUNTMGR_MOUNT_POINT input;
2008         MOUNTMGR_MOUNT_POINTS *output;
2009
2010         if (!(output = HeapAlloc( GetProcessHeap(), 0, size )))
2011         {
2012             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
2013             break;
2014         }
2015         memset( &input, 0, sizeof(input) );
2016
2017         if (!DeviceIoControl( mgr, IOCTL_MOUNTMGR_QUERY_POINTS, &input, sizeof(input),
2018                               output, size, &br, NULL ))
2019         {
2020             if (GetLastError() != ERROR_MORE_DATA) break;
2021             size = output->Size;
2022             HeapFree( GetProcessHeap(), 0, output );
2023             continue;
2024         }
2025         CloseHandle( mgr );
2026         /* abuse the Size field to store the current index */
2027         output->Size = 0;
2028         if (!FindNextVolumeW( output, volume, len ))
2029         {
2030             HeapFree( GetProcessHeap(), 0, output );
2031             return INVALID_HANDLE_VALUE;
2032         }
2033         return output;
2034     }
2035     CloseHandle( mgr );
2036     return INVALID_HANDLE_VALUE;
2037 }
2038
2039 /***********************************************************************
2040  *           FindNextVolumeA   (KERNEL32.@)
2041  */
2042 BOOL WINAPI FindNextVolumeA( HANDLE handle, LPSTR volume, DWORD len )
2043 {
2044     WCHAR *buffer = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
2045     BOOL ret;
2046
2047     if ((ret = FindNextVolumeW( handle, buffer, len )))
2048     {
2049         if (!WideCharToMultiByte( CP_ACP, 0, buffer, -1, volume, len, NULL, NULL )) ret = FALSE;
2050     }
2051     HeapFree( GetProcessHeap(), 0, buffer );
2052     return ret;
2053 }
2054
2055 /***********************************************************************
2056  *           FindNextVolumeW   (KERNEL32.@)
2057  */
2058 BOOL WINAPI FindNextVolumeW( HANDLE handle, LPWSTR volume, DWORD len )
2059 {
2060     MOUNTMGR_MOUNT_POINTS *data = handle;
2061
2062     while (data->Size < data->NumberOfMountPoints)
2063     {
2064         static const WCHAR volumeW[] = {'\\','?','?','\\','V','o','l','u','m','e','{',};
2065         WCHAR *link = (WCHAR *)((char *)data + data->MountPoints[data->Size].SymbolicLinkNameOffset);
2066         DWORD size = data->MountPoints[data->Size].SymbolicLinkNameLength;
2067         data->Size++;
2068         /* skip non-volumes */
2069         if (size < sizeof(volumeW) || memcmp( link, volumeW, sizeof(volumeW) )) continue;
2070         if (size + sizeof(WCHAR) >= len * sizeof(WCHAR))
2071         {
2072             SetLastError( ERROR_FILENAME_EXCED_RANGE );
2073             return FALSE;
2074         }
2075         memcpy( volume, link, size );
2076         volume[1] = '\\';  /* map \??\ to \\?\ */
2077         volume[size / sizeof(WCHAR)] = '\\';  /* Windows appends a backslash */
2078         volume[size / sizeof(WCHAR) + 1] = 0;
2079         TRACE( "returning entry %u %s\n", data->Size - 1, debugstr_w(volume) );
2080         return TRUE;
2081     }
2082     SetLastError( ERROR_NO_MORE_FILES );
2083     return FALSE;
2084 }
2085
2086 /***********************************************************************
2087  *           FindVolumeClose   (KERNEL32.@)
2088  */
2089 BOOL WINAPI FindVolumeClose(HANDLE handle)
2090 {
2091     return HeapFree( GetProcessHeap(), 0, handle );
2092 }
2093
2094 /***********************************************************************
2095  *           FindFirstVolumeMountPointA   (KERNEL32.@)
2096  */
2097 HANDLE WINAPI FindFirstVolumeMountPointA(LPCSTR root, LPSTR mount_point, DWORD len)
2098 {
2099     FIXME("(%s, %p, %d), stub!\n", debugstr_a(root), mount_point, len);
2100     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2101     return INVALID_HANDLE_VALUE;
2102 }
2103
2104 /***********************************************************************
2105  *           FindFirstVolumeMountPointW   (KERNEL32.@)
2106  */
2107 HANDLE WINAPI FindFirstVolumeMountPointW(LPCWSTR root, LPWSTR mount_point, DWORD len)
2108 {
2109     FIXME("(%s, %p, %d), stub!\n", debugstr_w(root), mount_point, len);
2110     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2111     return INVALID_HANDLE_VALUE;
2112 }
2113
2114 /***********************************************************************
2115  *           FindVolumeMountPointClose   (KERNEL32.@)
2116  */
2117 BOOL WINAPI FindVolumeMountPointClose(HANDLE h)
2118 {
2119     FIXME("(%p), stub!\n", h);
2120     return FALSE;
2121 }
2122
2123 /***********************************************************************
2124  *           DeleteVolumeMountPointA   (KERNEL32.@)
2125  */
2126 BOOL WINAPI DeleteVolumeMountPointA(LPCSTR mountpoint)
2127 {
2128     FIXME("(%s), stub!\n", debugstr_a(mountpoint));
2129     return FALSE;
2130 }
2131
2132 /***********************************************************************
2133  *           DeleteVolumeMountPointW (KERNEL32.@)
2134  */
2135 BOOL WINAPI DeleteVolumeMountPointW(LPCWSTR mountpoint)
2136 {
2137     FIXME("(%s), stub!\n", debugstr_w(mountpoint));
2138     return FALSE;
2139 }
2140
2141 /***********************************************************************
2142  *           SetVolumeMountPointA (KERNEL32.@)
2143  */
2144 BOOL WINAPI SetVolumeMountPointA(LPCSTR path, LPCSTR volume)
2145 {
2146     FIXME("(%s, %s), stub!\n", debugstr_a(path), debugstr_a(volume));
2147     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2148     return FALSE;
2149 }
2150
2151 /***********************************************************************
2152  *           SetVolumeMountPointW (KERNEL32.@)
2153  */
2154 BOOL WINAPI SetVolumeMountPointW(LPCWSTR path, LPCWSTR volume)
2155 {
2156     FIXME("(%s, %s), stub!\n", debugstr_w(path), debugstr_w(volume));
2157     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2158     return FALSE;
2159 }
2160
2161 /***********************************************************************
2162  *           GetVolumeInformationByHandleW (KERNEL32.@)
2163  */
2164 BOOL WINAPI GetVolumeInformationByHandleW(HANDLE handle, WCHAR *volnamebuf, DWORD volnamesize, DWORD *volserial, DWORD *maxlength, DWORD *flags, WCHAR *fsnamebuf, DWORD fsnamesize)
2165 {
2166     FIXME("%p %p %d %p %p %p %p %d\n", handle, volnamebuf, volnamesize, volserial, maxlength, flags, fsnamebuf, fsnamesize);
2167
2168     if(volnamebuf && volnamesize)
2169         *volnamebuf = 0;
2170     if(volserial)
2171         *volserial = 0;
2172     if(maxlength)
2173         *maxlength = 0;
2174     if(flags)
2175         *flags = 0;
2176     if(fsnamebuf && fsnamesize)
2177         *fsnamebuf = 0;
2178
2179     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2180     return FALSE;
2181 }