files/drive.c

   1 /*
   2  * DOS drives handling functions
   3  *
   4  * Copyright 1993 Erik Bos
   5  * Copyright 1996 Alexandre Julliard
   6  */
   7
   8 #include "config.h"
   9
  10 #include <assert.h>
  11 #include <ctype.h>
  12 #include <string.h>
  13 #include <stdlib.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16 #include <fcntl.h>
  17 #include <errno.h>
  18 #include <unistd.h>
  19
  20 #ifdef HAVE_SYS_PARAM_H
  21 # include <sys/param.h>
  22 #endif
  23 #ifdef STATFS_DEFINED_BY_SYS_VFS
  24 # include <sys/vfs.h>
  25 #else
  26 # ifdef STATFS_DEFINED_BY_SYS_MOUNT
  27 #  include <sys/mount.h>
  28 # else
  29 #  ifdef STATFS_DEFINED_BY_SYS_STATFS
  30 #   include <sys/statfs.h>
  31 #  endif
  32 # endif
  33 #endif
  34
  35 #include "winbase.h"
  36 #include "wine/winbase16.h"   /* for GetCurrentTask */
  37 #include "wine/winestring.h"  /* for lstrcpyAtoW */
  38 #include "winerror.h"
  39 #include "drive.h"
  40 #include "file.h"
  41 #include "heap.h"
  42 #include "msdos.h"
  43 #include "options.h"
  44 #include "task.h"
  45 #include "debugtools.h"
  46
  47 DECLARE_DEBUG_CHANNEL(dosfs)
  48 DECLARE_DEBUG_CHANNEL(file)
  49
  50 typedef struct
  51 {
  52     char     *root;      /* root dir in Unix format without trailing / */
  53     char     *dos_cwd;   /* cwd in DOS format without leading or trailing \ */
  54     char     *unix_cwd;  /* cwd in Unix format without leading or trailing / */
  55     char     *device;    /* raw device path */
  56     char      label[12]; /* drive label */
  57     DWORD     serial;    /* drive serial number */
  58     DRIVETYPE type;      /* drive type */
  59     UINT    flags;     /* drive flags */
  60     dev_t     dev;       /* unix device number */
  61     ino_t     ino;       /* unix inode number */
  62 } DOSDRIVE;
  63
  64
  65 static const char * const DRIVE_Types[] =
  66 {
  67     "floppy",   /* TYPE_FLOPPY */
  68     "hd",       /* TYPE_HD */
  69     "cdrom",    /* TYPE_CDROM */
  70     "network"   /* TYPE_NETWORK */
  71 };
  72
  73
  74 /* Known filesystem types */
  75
  76 typedef struct
  77 {
  78     const char *name;
  79     UINT      flags;
  80 } FS_DESCR;
  81
  82 static const FS_DESCR DRIVE_Filesystems[] =
  83 {
  84     { "unix",   DRIVE_CASE_SENSITIVE | DRIVE_CASE_PRESERVING },
  85     { "msdos",  DRIVE_SHORT_NAMES },
  86     { "dos",    DRIVE_SHORT_NAMES },
  87     { "fat",    DRIVE_SHORT_NAMES },
  88     { "vfat",   DRIVE_CASE_PRESERVING },
  89     { "win95",  DRIVE_CASE_PRESERVING },
  90     { NULL, 0 }
  91 };
  92
  93
  94 static DOSDRIVE DOSDrives[MAX_DOS_DRIVES];
  95 static int DRIVE_CurDrive = -1;
  96
  97 static HTASK16 DRIVE_LastTask = 0;
  98
  99
 100 /***********************************************************************
 101  *           DRIVE_GetDriveType
 102  */
 103 static DRIVETYPE DRIVE_GetDriveType( const char *name )
 104 {
 105     char buffer[20];
 106     int i;
 107
 108     PROFILE_GetWineIniString( name, "Type", "hd", buffer, sizeof(buffer) );
 109     for (i = 0; i < sizeof(DRIVE_Types)/sizeof(DRIVE_Types[0]); i++)
 110     {
 111         if (!strcasecmp( buffer, DRIVE_Types[i] )) return (DRIVETYPE)i;
 112     }
 113     MESSAGE("%s: unknown type '%s', defaulting to 'hd'.\n", name, buffer );
 114     return TYPE_HD;
 115 }
 116
 117
 118 /***********************************************************************
 119  *           DRIVE_GetFSFlags
 120  */
 121 static UINT DRIVE_GetFSFlags( const char *name, const char *value )
 122 {
 123     const FS_DESCR *descr;
 124
 125     for (descr = DRIVE_Filesystems; descr->name; descr++)
 126         if (!strcasecmp( value, descr->name )) return descr->flags;
 127     MESSAGE("%s: unknown filesystem type '%s', defaulting to 'win95'.\n",
 128         name, value );
 129     return DRIVE_CASE_PRESERVING;
 130 }
 131
 132
 133 /***********************************************************************
 134  *           DRIVE_Init
 135  */
 136 int DRIVE_Init(void)
 137 {
 138     int i, len, count = 0;
 139     char name[] = "Drive A";
 140     char path[MAX_PATHNAME_LEN];
 141     char buffer[80];
 142     struct stat drive_stat_buffer;
 143     char *p;
 144     DOSDRIVE *drive;
 145
 146     for (i = 0, drive = DOSDrives; i < MAX_DOS_DRIVES; i++, name[6]++, drive++)
 147     {
 148         PROFILE_GetWineIniString( name, "Path", "", path, sizeof(path)-1 );
 149         if (path[0])
 150         {
 151             p = path + strlen(path) - 1;
 152             while ((p > path) && ((*p == '/') || (*p == '\\'))) *p-- = '\0';
 153             if (!path[0]) strcpy( path, "/" );
 154
 155             if (stat( path, &drive_stat_buffer ))
 156             {
 157                 MESSAGE("Could not stat %s, ignoring drive %c:\n", path, 'A' + i );
 158                 continue;
 159             }
 160             if (!S_ISDIR(drive_stat_buffer.st_mode))
 161             {
 162                 MESSAGE("%s is not a directory, ignoring drive %c:\n",
 163                     path, 'A' + i );
 164                 continue;
 165             }
 166
 167             drive->root = HEAP_strdupA( SystemHeap, 0, path );
 168             drive->dos_cwd  = HEAP_strdupA( SystemHeap, 0, "" );
 169             drive->unix_cwd = HEAP_strdupA( SystemHeap, 0, "" );
 170             drive->type     = DRIVE_GetDriveType( name );
 171             drive->device   = NULL;
 172             drive->flags    = 0;
 173             drive->dev      = drive_stat_buffer.st_dev;
 174             drive->ino      = drive_stat_buffer.st_ino;
 175
 176             /* Get the drive label */
 177             PROFILE_GetWineIniString( name, "Label", name, drive->label, 12 );
 178             if ((len = strlen(drive->label)) < 11)
 179             {
 180                 /* Pad label with spaces */
 181                 memset( drive->label + len, ' ', 11 - len );
 182                 drive->label[12] = '\0';
 183             }
 184
 185             /* Get the serial number */
 186             PROFILE_GetWineIniString( name, "Serial", "12345678",
 187                                       buffer, sizeof(buffer) );
 188             drive->serial = strtoul( buffer, NULL, 16 );
 189
 190             /* Get the filesystem type */
 191             PROFILE_GetWineIniString( name, "Filesystem", "win95",
 192                                       buffer, sizeof(buffer) );
 193             drive->flags = DRIVE_GetFSFlags( name, buffer );
 194
 195             /* Get the device */
 196             PROFILE_GetWineIniString( name, "Device", "",
 197                                       buffer, sizeof(buffer) );
 198             if (buffer[0])
 199                 drive->device = HEAP_strdupA( SystemHeap, 0, buffer );
 200
 201             /* Make the first hard disk the current drive */
 202             if ((DRIVE_CurDrive == -1) && (drive->type == TYPE_HD))
 203                 DRIVE_CurDrive = i;
 204
 205             count++;
 206             TRACE_(dosfs)("%s: path=%s type=%s label='%s' serial=%08lx flags=%08x dev=%x ino=%x\n",
 207                            name, path, DRIVE_Types[drive->type],
 208                            drive->label, drive->serial, drive->flags,
 209                            (int)drive->dev, (int)drive->ino );
 210         }
 211         else WARN_(dosfs)("%s: not defined\n", name );
 212     }
 213
 214     if (!count)
 215     {
 216         MESSAGE("Warning: no valid DOS drive found, check your configuration file.\n" );
 217         /* Create a C drive pointing to Unix root dir */
 218         DOSDrives[2].root     = HEAP_strdupA( SystemHeap, 0, "/" );
 219         DOSDrives[2].dos_cwd  = HEAP_strdupA( SystemHeap, 0, "" );
 220         DOSDrives[2].unix_cwd = HEAP_strdupA( SystemHeap, 0, "" );
 221         strcpy( DOSDrives[2].label, "Drive C    " );
 222         DOSDrives[2].serial   = 0x12345678;
 223         DOSDrives[2].type     = TYPE_HD;
 224         DOSDrives[2].flags    = 0;
 225         DRIVE_CurDrive = 2;
 226     }
 227
 228     /* Make sure the current drive is valid */
 229     if (DRIVE_CurDrive == -1)
 230     {
 231         for (i = 0, drive = DOSDrives; i < MAX_DOS_DRIVES; i++, drive++)
 232         {
 233             if (drive->root && !(drive->flags & DRIVE_DISABLED))
 234             {
 235                 DRIVE_CurDrive = i;
 236                 break;
 237             }
 238         }
 239     }
 240
 241     return 1;
 242 }
 243
 244
 245 /***********************************************************************
 246  *           DRIVE_IsValid
 247  */
 248 int DRIVE_IsValid( int drive )
 249 {
 250     if ((drive < 0) || (drive >= MAX_DOS_DRIVES)) return 0;
 251     return (DOSDrives[drive].root &&
 252             !(DOSDrives[drive].flags & DRIVE_DISABLED));
 253 }
 254
 255
 256 /***********************************************************************
 257  *           DRIVE_GetCurrentDrive
 258  */
 259 int DRIVE_GetCurrentDrive(void)
 260 {
 261     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 262     if (pTask && (pTask->curdrive & 0x80)) return pTask->curdrive & ~0x80;
 263     return DRIVE_CurDrive;
 264 }
 265
 266
 267 /***********************************************************************
 268  *           DRIVE_SetCurrentDrive
 269  */
 270 int DRIVE_SetCurrentDrive( int drive )
 271 {
 272     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 273     if (!DRIVE_IsValid( drive ))
 274     {
 275         SetLastError( ERROR_INVALID_DRIVE );
 276         return 0;
 277     }
 278     TRACE_(dosfs)("%c:\n", 'A' + drive );
 279     DRIVE_CurDrive = drive;
 280     if (pTask) pTask->curdrive = drive | 0x80;
 281     return 1;
 282 }
 283
 284
 285 /***********************************************************************
 286  *           DRIVE_FindDriveRoot
 287  *
 288  * Find a drive for which the root matches the begginning of the given path.
 289  * This can be used to translate a Unix path into a drive + DOS path.
 290  * Return value is the drive, or -1 on error. On success, path is modified
 291  * to point to the beginning of the DOS path.
 292  */
 293 int DRIVE_FindDriveRoot( const char **path )
 294 {
 295     /* idea: check at all '/' positions.
 296      * If the device and inode of that path is identical with the
 297      * device and inode of the current drive then we found a solution.
 298      * If there is another drive pointing to a deeper position in
 299      * the file tree, we want to find that one, not the earlier solution.
 300      */
 301     int drive, rootdrive = -1;
 302     char buffer[MAX_PATHNAME_LEN];
 303     char *next = buffer;
 304     const char *p = *path;
 305     struct stat st;
 306
 307     strcpy( buffer, "/" );
 308     for (;;)
 309     {
 310         if (stat( buffer, &st ) || !S_ISDIR( st.st_mode )) break;
 311
 312         /* Find the drive */
 313
 314         for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
 315         {
 316            if (!DOSDrives[drive].root ||
 317                (DOSDrives[drive].flags & DRIVE_DISABLED)) continue;
 318
 319            if ((DOSDrives[drive].dev == st.st_dev) &&
 320                (DOSDrives[drive].ino == st.st_ino))
 321            {
 322                rootdrive = drive;
 323                *path = p;
 324            }
 325         }
 326
 327         /* Get the next path component */
 328
 329         *next++ = '/';
 330         while ((*p == '/') || (*p == '\\')) p++;
 331         if (!*p) break;
 332         while (!IS_END_OF_NAME(*p)) *next++ = *p++;
 333         *next = 0;
 334     }
 335     *next = 0;
 336
 337     if (rootdrive != -1)
 338         TRACE_(dosfs)("%s -> drive %c:, root='%s', name='%s'\n",
 339                        buffer, 'A' + rootdrive,
 340                        DOSDrives[rootdrive].root, *path );
 341     return rootdrive;
 342 }
 343
 344
 345 /***********************************************************************
 346  *           DRIVE_GetRoot
 347  */
 348 const char * DRIVE_GetRoot( int drive )
 349 {
 350     if (!DRIVE_IsValid( drive )) return NULL;
 351     return DOSDrives[drive].root;
 352 }
 353
 354
 355 /***********************************************************************
 356  *           DRIVE_GetDosCwd
 357  */
 358 const char * DRIVE_GetDosCwd( int drive )
 359 {
 360     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 361     if (!DRIVE_IsValid( drive )) return NULL;
 362
 363     /* Check if we need to change the directory to the new task. */
 364     if (pTask && (pTask->curdrive & 0x80) &&    /* The task drive is valid */
 365         ((pTask->curdrive & ~0x80) == drive) && /* and it's the one we want */
 366         (DRIVE_LastTask != GetCurrentTask()))   /* and the task changed */
 367     {
 368         /* Perform the task-switch */
 369         if (!DRIVE_Chdir( drive, pTask->curdir )) DRIVE_Chdir( drive, "\\" );
 370         DRIVE_LastTask = GetCurrentTask();
 371     }
 372     return DOSDrives[drive].dos_cwd;
 373 }
 374
 375
 376 /***********************************************************************
 377  *           DRIVE_GetUnixCwd
 378  */
 379 const char * DRIVE_GetUnixCwd( int drive )
 380 {
 381     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 382     if (!DRIVE_IsValid( drive )) return NULL;
 383
 384     /* Check if we need to change the directory to the new task. */
 385     if (pTask && (pTask->curdrive & 0x80) &&    /* The task drive is valid */
 386         ((pTask->curdrive & ~0x80) == drive) && /* and it's the one we want */
 387         (DRIVE_LastTask != GetCurrentTask()))   /* and the task changed */
 388     {
 389         /* Perform the task-switch */
 390         if (!DRIVE_Chdir( drive, pTask->curdir )) DRIVE_Chdir( drive, "\\" );
 391         DRIVE_LastTask = GetCurrentTask();
 392     }
 393     return DOSDrives[drive].unix_cwd;
 394 }
 395
 396
 397 /***********************************************************************
 398  *           DRIVE_GetLabel
 399  */
 400 const char * DRIVE_GetLabel( int drive )
 401 {
 402     if (!DRIVE_IsValid( drive )) return NULL;
 403     return DOSDrives[drive].label;
 404 }
 405
 406
 407 /***********************************************************************
 408  *           DRIVE_GetSerialNumber
 409  */
 410 DWORD DRIVE_GetSerialNumber( int drive )
 411 {
 412     if (!DRIVE_IsValid( drive )) return 0;
 413     return DOSDrives[drive].serial;
 414 }
 415
 416
 417 /***********************************************************************
 418  *           DRIVE_SetSerialNumber
 419  */
 420 int DRIVE_SetSerialNumber( int drive, DWORD serial )
 421 {
 422     if (!DRIVE_IsValid( drive )) return 0;
 423     DOSDrives[drive].serial = serial;
 424     return 1;
 425 }
 426
 427
 428 /***********************************************************************
 429  *           DRIVE_GetType
 430  */
 431 DRIVETYPE DRIVE_GetType( int drive )
 432 {
 433     if (!DRIVE_IsValid( drive )) return TYPE_INVALID;
 434     return DOSDrives[drive].type;
 435 }
 436
 437
 438 /***********************************************************************
 439  *           DRIVE_GetFlags
 440  */
 441 UINT DRIVE_GetFlags( int drive )
 442 {
 443     if ((drive < 0) || (drive >= MAX_DOS_DRIVES)) return 0;
 444     return DOSDrives[drive].flags;
 445 }
 446
 447
 448 /***********************************************************************
 449  *           DRIVE_Chdir
 450  */
 451 int DRIVE_Chdir( int drive, const char *path )
 452 {
 453     DOS_FULL_NAME full_name;
 454     char buffer[MAX_PATHNAME_LEN];
 455     LPSTR unix_cwd;
 456     BY_HANDLE_FILE_INFORMATION info;
 457     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 458
 459     strcpy( buffer, "A:" );
 460     buffer[0] += drive;
 461     TRACE_(dosfs)("(%c:,%s)\n", buffer[0], path );
 462     lstrcpynA( buffer + 2, path, sizeof(buffer) - 2 );
 463
 464     if (!DOSFS_GetFullName( buffer, TRUE, &full_name )) return 0;
 465     if (!FILE_Stat( full_name.long_name, &info )) return 0;
 466     if (!(info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
 467     {
 468         SetLastError( ERROR_FILE_NOT_FOUND );
 469         return 0;
 470     }
 471     unix_cwd = full_name.long_name + strlen( DOSDrives[drive].root );
 472     while (*unix_cwd == '/') unix_cwd++;
 473
 474     TRACE_(dosfs)("(%c:): unix_cwd=%s dos_cwd=%s\n",
 475                    'A' + drive, unix_cwd, full_name.short_name + 3 );
 476
 477     HeapFree( SystemHeap, 0, DOSDrives[drive].dos_cwd );
 478     HeapFree( SystemHeap, 0, DOSDrives[drive].unix_cwd );
 479     DOSDrives[drive].dos_cwd  = HEAP_strdupA( SystemHeap, 0,
 480                                               full_name.short_name + 3 );
 481     DOSDrives[drive].unix_cwd = HEAP_strdupA( SystemHeap, 0, unix_cwd );
 482
 483     if (pTask && (pTask->curdrive & 0x80) &&
 484         ((pTask->curdrive & ~0x80) == drive))
 485     {
 486         lstrcpynA( pTask->curdir, full_name.short_name + 2,
 487                      sizeof(pTask->curdir) );
 488         DRIVE_LastTask = GetCurrentTask();
 489     }
 490     return 1;
 491 }
 492
 493
 494 /***********************************************************************
 495  *           DRIVE_Disable
 496  */
 497 int DRIVE_Disable( int drive  )
 498 {
 499     if ((drive < 0) || (drive >= MAX_DOS_DRIVES) || !DOSDrives[drive].root)
 500     {
 501         SetLastError( ERROR_INVALID_DRIVE );
 502         return 0;
 503     }
 504     DOSDrives[drive].flags |= DRIVE_DISABLED;
 505     return 1;
 506 }
 507
 508
 509 /***********************************************************************
 510  *           DRIVE_Enable
 511  */
 512 int DRIVE_Enable( int drive  )
 513 {
 514     if ((drive < 0) || (drive >= MAX_DOS_DRIVES) || !DOSDrives[drive].root)
 515     {
 516         SetLastError( ERROR_INVALID_DRIVE );
 517         return 0;
 518     }
 519     DOSDrives[drive].flags &= ~DRIVE_DISABLED;
 520     return 1;
 521 }
 522
 523
 524 /***********************************************************************
 525  *           DRIVE_SetLogicalMapping
 526  */
 527 int DRIVE_SetLogicalMapping ( int existing_drive, int new_drive )
 528 {
 529  /* If new_drive is already valid, do nothing and return 0
 530     otherwise, copy DOSDrives[existing_drive] to DOSDrives[new_drive] */
 531
 532     DOSDRIVE *old, *new;
 533
 534     old = DOSDrives + existing_drive;
 535     new = DOSDrives + new_drive;
 536
 537     if ((existing_drive < 0) || (existing_drive >= MAX_DOS_DRIVES) ||
 538         !old->root ||
 539         (new_drive < 0) || (new_drive >= MAX_DOS_DRIVES))
 540     {
 541         SetLastError( ERROR_INVALID_DRIVE );
 542         return 0;
 543     }
 544
 545     if ( new->root )
 546     {
 547         TRACE_(dosfs)("Can\'t map drive %c to drive %c - "
 548                                 "drive %c already exists\n",
 549                         'A' + existing_drive, 'A' + new_drive,
 550                         'A' + new_drive );
 551         /* it is already mapped there, so return success */
 552         if (!strcmp(old->root,new->root))
 553             return 1;
 554         return 0;
 555     }
 556
 557     new->root = HEAP_strdupA( SystemHeap, 0, old->root );
 558     new->dos_cwd = HEAP_strdupA( SystemHeap, 0, old->dos_cwd );
 559     new->unix_cwd = HEAP_strdupA( SystemHeap, 0, old->unix_cwd );
 560     memcpy ( new->label, old->label, 12 );
 561     new->serial = old->serial;
 562     new->type = old->type;
 563     new->flags = old->flags;
 564     new->dev = old->dev;
 565     new->ino = old->ino;
 566
 567     TRACE_(dosfs)("Drive %c is now equal to drive %c\n",
 568                     'A' + new_drive, 'A' + existing_drive );
 569
 570     return 1;
 571 }
 572
 573
 574 /***********************************************************************
 575  *           DRIVE_OpenDevice
 576  *
 577  * Open the drive raw device and return a Unix fd (or -1 on error).
 578  */
 579 int DRIVE_OpenDevice( int drive, int flags )
 580 {
 581     if (!DRIVE_IsValid( drive )) return -1;
 582     return open( DOSDrives[drive].device, flags );
 583 }
 584
 585
 586 /***********************************************************************
 587  *           DRIVE_RawRead
 588  *
 589  * Read raw sectors from a device
 590  */
 591 int DRIVE_RawRead(BYTE drive, DWORD begin, DWORD nr_sect, BYTE *dataptr, BOOL fake_success)
 592 {
 593     int fd;
 594
 595     if ((fd = DRIVE_OpenDevice( drive, O_RDONLY )) != -1)
 596     {
 597         lseek( fd, begin * 512, SEEK_SET );
 598         /* FIXME: check errors */
 599         read( fd, dataptr, nr_sect * 512 );
 600         close( fd );
 601     }
 602     else
 603     {
 604         memset(dataptr, 0, nr_sect * 512);
 605                 if (fake_success)
 606         {
 607                         if (begin == 0 && nr_sect > 1) *(dataptr + 512) = 0xf8;
 608                         if (begin == 1) *dataptr = 0xf8;
 609                 }
 610                 else
 611                 return 0;
 612     }
 613         return 1;
 614 }
 615
 616
 617 /***********************************************************************
 618  *           DRIVE_RawWrite
 619  *
 620  * Write raw sectors to a device
 621  */
 622 int DRIVE_RawWrite(BYTE drive, DWORD begin, DWORD nr_sect, BYTE *dataptr, BOOL fake_success)
 623 {
 624         int fd;
 625
 626     if ((fd = DRIVE_OpenDevice( drive, O_RDONLY )) != -1)
 627     {
 628         lseek( fd, begin * 512, SEEK_SET );
 629         /* FIXME: check errors */
 630         write( fd, dataptr, nr_sect * 512 );
 631         close( fd );
 632     }
 633     else
 634         if (!(fake_success))
 635                 return 0;
 636
 637         return 1;
 638 }
 639
 640
 641 /***********************************************************************
 642  *           DRIVE_GetFreeSpace
 643  */
 644 static int DRIVE_GetFreeSpace( int drive, PULARGE_INTEGER size,
 645                                PULARGE_INTEGER available )
 646 {
 647     struct statfs info;
 648     unsigned long long  bigsize,bigavail=0;
 649
 650     if (!DRIVE_IsValid(drive))
 651     {
 652         SetLastError( ERROR_INVALID_DRIVE );
 653         return 0;
 654     }
 655
 656 /* FIXME: add autoconf check for this */
 657 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
 658     if (statfs( DOSDrives[drive].root, &info, 0, 0) < 0)
 659 #else
 660     if (statfs( DOSDrives[drive].root, &info) < 0)
 661 #endif
 662     {
 663         FILE_SetDosError();
 664         WARN_(dosfs)("cannot do statfs(%s)\n", DOSDrives[drive].root);
 665         return 0;
 666     }
 667
 668     bigsize = (unsigned long long)info.f_bsize
 669       * (unsigned long long)info.f_blocks;
 670 #ifdef STATFS_HAS_BAVAIL
 671     bigavail = (unsigned long long)info.f_bavail
 672       * (unsigned long long)info.f_bsize;
 673 #else
 674 # ifdef STATFS_HAS_BFREE
 675     bigavail = (unsigned long long)info.f_bfree
 676       * (unsigned long long)info.f_bsize;
 677 # else
 678 #  error "statfs has no bfree/bavail member!"
 679 # endif
 680 #endif
 681     size->LowPart = (DWORD)bigsize;
 682     size->HighPart = (DWORD)(bigsize>>32);
 683     available->LowPart = (DWORD)bigavail;
 684     available->HighPart = (DWORD)(bigavail>>32);
 685     return 1;
 686 }
 687
 688
 689 /***********************************************************************
 690  *           GetDiskFreeSpace16   (KERNEL.422)
 691  */
 692 BOOL16 WINAPI GetDiskFreeSpace16( LPCSTR root, LPDWORD cluster_sectors,
 693                                   LPDWORD sector_bytes, LPDWORD free_clusters,
 694                                   LPDWORD total_clusters )
 695 {
 696     return GetDiskFreeSpaceA( root, cluster_sectors, sector_bytes,
 697                                 free_clusters, total_clusters );
 698 }
 699
 700
 701 /***********************************************************************
 702  *           GetDiskFreeSpace32A   (KERNEL32.206)
 703  *
 704  * Fails if expression resulting from current drive's dir and "root"
 705  * is not a root dir of the target drive.
 706  *
 707  * UNDOC: setting some LPDWORDs to NULL is perfectly possible
 708  * if the corresponding info is unneeded.
 709  *
 710  * FIXME: needs to support UNC names from Win95 OSR2 on.
 711  *
 712  * Behaviour under Win95a:
 713  * CurrDir     root   result
 714  * "E:\\TEST"  "E:"   FALSE
 715  * "E:\\"      "E:"   TRUE
 716  * "E:\\"      "E"    FALSE
 717  * "E:\\"      "\\"   TRUE
 718  * "E:\\TEST"  "\\"   TRUE
 719  * "E:\\TEST"  ":\\"  FALSE
 720  * "E:\\TEST"  "E:\\" TRUE
 721  * "E:\\TEST"  ""     FALSE
 722  * "E:\\"      ""     FALSE (!)
 723  * "E:\\"      0x0    TRUE
 724  * "E:\\TEST"  0x0    TRUE  (!)
 725  * "E:\\TEST"  "C:"   TRUE  (when CurrDir of "C:" set to "\\")
 726  * "E:\\TEST"  "C:"   FALSE (when CurrDir of "C:" set to "\\TEST")
 727  */
 728 BOOL WINAPI GetDiskFreeSpaceA( LPCSTR root, LPDWORD cluster_sectors,
 729                                    LPDWORD sector_bytes, LPDWORD free_clusters,
 730                                    LPDWORD total_clusters )
 731 {
 732     int drive;
 733     ULARGE_INTEGER size,available;
 734     LPCSTR path;
 735     DWORD cluster_sec;
 736
 737     if ((!root) || (root == "\\"))
 738         drive = DRIVE_GetCurrentDrive();
 739     else
 740     if ( (strlen(root) >= 2) && (root[1] == ':')) /* root contains drive tag */
 741     {
 742         drive = toupper(root[0]) - 'A';
 743         path = &root[2];
 744         if (path[0] == '\0')
 745             path = DRIVE_GetDosCwd(drive);
 746         else
 747         if (path[0] == '\\')
 748             path++;
 749         if (strlen(path)) /* oops, we are in a subdir */
 750             return FALSE;
 751     }
 752     else
 753         return FALSE;
 754
 755     if (!DRIVE_GetFreeSpace(drive, &size, &available)) return FALSE;
 756
 757     /* Cap the size and available at 2GB as per specs.  */
 758     if ((size.HighPart) ||(size.LowPart > 0x7fffffff))
 759         {
 760           size.HighPart = 0;
 761           size.LowPart = 0x7fffffff;
 762         }
 763     if ((available.HighPart) ||(available.LowPart > 0x7fffffff))
 764       {
 765         available.HighPart =0;
 766         available.LowPart = 0x7fffffff;
 767       }
 768     if (DRIVE_GetType(drive)==TYPE_CDROM) {
 769         if (sector_bytes)
 770         *sector_bytes    = 2048;
 771         size.LowPart            /= 2048;
 772         available.LowPart       /= 2048;
 773     } else {
 774         if (sector_bytes)
 775         *sector_bytes    = 512;
 776         size.LowPart            /= 512;
 777         available.LowPart       /= 512;
 778     }
 779     /* fixme: probably have to adjust those variables too for CDFS */
 780     cluster_sec = 1;
 781     while (cluster_sec * 65536 < size.LowPart) cluster_sec *= 2;
 782
 783     if (cluster_sectors)
 784         *cluster_sectors = cluster_sec;
 785     if (free_clusters)
 786         *free_clusters   = available.LowPart / cluster_sec;
 787     if (total_clusters)
 788         *total_clusters  = size.LowPart / cluster_sec;
 789     return TRUE;
 790 }
 791
 792
 793 /***********************************************************************
 794  *           GetDiskFreeSpace32W   (KERNEL32.207)
 795  */
 796 BOOL WINAPI GetDiskFreeSpaceW( LPCWSTR root, LPDWORD cluster_sectors,
 797                                    LPDWORD sector_bytes, LPDWORD free_clusters,
 798                                    LPDWORD total_clusters )
 799 {
 800     LPSTR xroot;
 801     BOOL ret;
 802
 803     xroot = HEAP_strdupWtoA( GetProcessHeap(), 0, root);
 804     ret = GetDiskFreeSpaceA( xroot,cluster_sectors, sector_bytes,
 805                                free_clusters, total_clusters );
 806     HeapFree( GetProcessHeap(), 0, xroot );
 807     return ret;
 808 }
 809
 810
 811 /***********************************************************************
 812  *           GetDiskFreeSpaceEx32A   (KERNEL32.871)
 813  */
 814 BOOL WINAPI GetDiskFreeSpaceExA( LPCSTR root,
 815                                      PULARGE_INTEGER avail,
 816                                      PULARGE_INTEGER total,
 817                                      PULARGE_INTEGER totalfree)
 818 {
 819     int drive;
 820     ULARGE_INTEGER size,available;
 821
 822     if (!root) drive = DRIVE_GetCurrentDrive();
 823     else
 824     {
 825         if ((root[1]) && ((root[1] != ':') || (root[2] != '\\')))
 826         {
 827             WARN_(dosfs)("invalid root '%s'\n", root );
 828             return FALSE;
 829         }
 830         drive = toupper(root[0]) - 'A';
 831     }
 832     if (!DRIVE_GetFreeSpace(drive, &size, &available)) return FALSE;
 833     /*FIXME: Do we have the number of bytes available to the user? */
 834     if (totalfree) {
 835         totalfree->HighPart = size.HighPart;
 836         totalfree->LowPart = size.LowPart ;
 837     }
 838     if (avail) {
 839         avail->HighPart = available.HighPart;
 840         avail->LowPart = available.LowPart ;
 841     }
 842     return TRUE;
 843 }
 844
 845 /***********************************************************************
 846  *           GetDiskFreeSpaceEx32W   (KERNEL32.873)
 847  */
 848 BOOL WINAPI GetDiskFreeSpaceExW( LPCWSTR root, PULARGE_INTEGER avail,
 849                                      PULARGE_INTEGER total,
 850                                      PULARGE_INTEGER  totalfree)
 851 {
 852     LPSTR xroot;
 853     BOOL ret;
 854
 855     xroot = HEAP_strdupWtoA( GetProcessHeap(), 0, root);
 856     ret = GetDiskFreeSpaceExA( xroot, avail, total, totalfree);
 857     HeapFree( GetProcessHeap(), 0, xroot );
 858     return ret;
 859 }
 860
 861 /***********************************************************************
 862  *           GetDriveType16   (KERNEL.136)
 863  * This functions returns the drivetype of a drive in Win16.
 864  * Note that it returns DRIVE_REMOTE for CD-ROMs, since MSCDEX uses the
 865  * remote drive API. The returnvalue DRIVE_REMOTE for CD-ROMs has been
 866  * verified on Win3.11 and Windows 95. Some programs rely on it, so don't
 867  * do any pseudo-clever changes.
 868  *
 869  * RETURNS
 870  *      drivetype DRIVE_xxx
 871  */
 872 UINT16 WINAPI GetDriveType16(
 873         UINT16 drive    /* [in] number (NOT letter) of drive */
 874 ) {
 875     TRACE_(dosfs)("(%c:)\n", 'A' + drive );
 876     switch(DRIVE_GetType(drive))
 877     {
 878     case TYPE_FLOPPY:  return DRIVE_REMOVABLE;
 879     case TYPE_HD:      return DRIVE_FIXED;
 880     case TYPE_CDROM:   return DRIVE_REMOTE;
 881     case TYPE_NETWORK: return DRIVE_REMOTE;
 882     case TYPE_INVALID:
 883     default:           return DRIVE_CANNOTDETERMINE;
 884     }
 885 }
 886
 887
 888 /***********************************************************************
 889  *           GetDriveType32A   (KERNEL32.208)
 890  *
 891  * Returns the type of the disk drive specified.  If root is NULL the
 892  * root of the current directory is used.
 893  *
 894  * RETURNS
 895  *
 896  *  Type of drive (from Win32 SDK):
 897  *
 898  *   DRIVE_UNKNOWN     unable to find out anything about the drive
 899  *   DRIVE_NO_ROOT_DIR nonexistand root dir
 900  *   DRIVE_REMOVABLE   the disk can be removed from the machine
 901  *   DRIVE_FIXED       the disk can not be removed from the machine
 902  *   DRIVE_REMOTE      network disk
 903  *   DRIVE_CDROM       CDROM drive
 904  *   DRIVE_RAMDISK     virtual disk in ram
 905  *
 906  *   DRIVE_DOESNOTEXIST    XXX Not valid return value
 907  *   DRIVE_CANNOTDETERMINE XXX Not valid return value
 908  *
 909  * BUGS
 910  *
 911  *  Currently returns DRIVE_DOESNOTEXIST and DRIVE_CANNOTDETERMINE
 912  *  when it really should return DRIVE_NO_ROOT_DIR and DRIVE_UNKNOWN.
 913  *  Why where the former defines used?
 914  *
 915  *  DRIVE_RAMDISK is unsupported.
 916  */
 917 UINT WINAPI GetDriveTypeA(LPCSTR root /* String describing drive */)
 918 {
 919     int drive;
 920     TRACE_(dosfs)("(%s)\n", debugstr_a(root));
 921
 922     if (NULL == root) drive = DRIVE_GetCurrentDrive();
 923     else
 924     {
 925         if ((root[1]) && (root[1] != ':'))
 926         {
 927             WARN_(dosfs)("invalid root '%s'\n", debugstr_a(root));
 928             return DRIVE_DOESNOTEXIST;
 929         }
 930         drive = toupper(root[0]) - 'A';
 931     }
 932     switch(DRIVE_GetType(drive))
 933     {
 934     case TYPE_FLOPPY:  return DRIVE_REMOVABLE;
 935     case TYPE_HD:      return DRIVE_FIXED;
 936     case TYPE_CDROM:   return DRIVE_CDROM;
 937     case TYPE_NETWORK: return DRIVE_REMOTE;
 938     case TYPE_INVALID: return DRIVE_DOESNOTEXIST;
 939     default:           return DRIVE_CANNOTDETERMINE;
 940     }
 941 }
 942
 943
 944 /***********************************************************************
 945  *           GetDriveType32W   (KERNEL32.209)
 946  */
 947 UINT WINAPI GetDriveTypeW( LPCWSTR root )
 948 {
 949     LPSTR xpath = HEAP_strdupWtoA( GetProcessHeap(), 0, root );
 950     UINT ret = GetDriveTypeA( xpath );
 951     HeapFree( GetProcessHeap(), 0, xpath );
 952     return ret;
 953 }
 954
 955
 956 /***********************************************************************
 957  *           GetCurrentDirectory16   (KERNEL.411)
 958  */
 959 UINT16 WINAPI GetCurrentDirectory16( UINT16 buflen, LPSTR buf )
 960 {
 961     return (UINT16)GetCurrentDirectoryA( buflen, buf );
 962 }
 963
 964
 965 /***********************************************************************
 966  *           GetCurrentDirectory32A   (KERNEL32.196)
 967  *
 968  * Returns "X:\\path\\etc\\".
 969  *
 970  * Despite the API description, return required length including the
 971  * terminating null when buffer too small. This is the real behaviour.
 972  */
 973 UINT WINAPI GetCurrentDirectoryA( UINT buflen, LPSTR buf )
 974 {
 975     UINT ret;
 976     const char *s = DRIVE_GetDosCwd( DRIVE_GetCurrentDrive() );
 977
 978     assert(s);
 979     ret = strlen(s) + 3; /* length of WHOLE current directory */
 980     if (ret >= buflen) return ret + 1;
 981     lstrcpynA( buf, "A:\\", MIN( 4, buflen ) );
 982     if (buflen) buf[0] += DRIVE_GetCurrentDrive();
 983     if (buflen > 3) lstrcpynA( buf + 3, s, buflen - 3 );
 984     return ret;
 985 }
 986
 987
 988 /***********************************************************************
 989  *           GetCurrentDirectory32W   (KERNEL32.197)
 990  */
 991 UINT WINAPI GetCurrentDirectoryW( UINT buflen, LPWSTR buf )
 992 {
 993     LPSTR xpath = HeapAlloc( GetProcessHeap(), 0, buflen+1 );
 994     UINT ret = GetCurrentDirectoryA( buflen, xpath );
 995     lstrcpyAtoW( buf, xpath );
 996     HeapFree( GetProcessHeap(), 0, xpath );
 997     return ret;
 998 }
 999
1000
1001 /***********************************************************************
1002  *           SetCurrentDirectory   (KERNEL.412)
1003  */
1004 BOOL16 WINAPI SetCurrentDirectory16( LPCSTR dir )
1005 {
1006     return SetCurrentDirectoryA( dir );
1007 }
1008
1009
1010 /***********************************************************************
1011  *           SetCurrentDirectory32A   (KERNEL32.479)
1012  */
1013 BOOL WINAPI SetCurrentDirectoryA( LPCSTR dir )
1014 {
1015     int olddrive, drive = DRIVE_GetCurrentDrive();
1016
1017     if (!dir) {
1018         ERR_(file)("(NULL)!\n");
1019         return FALSE;
1020     }
1021     if (dir[0] && (dir[1]==':'))
1022     {
1023         drive = tolower( *dir ) - 'a';
1024         dir += 2;
1025     }
1026
1027     /* WARNING: we need to set the drive before the dir, as DRIVE_Chdir
1028        sets pTask->curdir only if pTask->curdrive is drive */
1029     olddrive = drive; /* in case DRIVE_Chdir fails */
1030     if (!(DRIVE_SetCurrentDrive( drive )))
1031         return FALSE;
1032     /* FIXME: what about empty strings? Add a \\ ? */
1033     if (!DRIVE_Chdir( drive, dir )) {
1034         DRIVE_SetCurrentDrive(olddrive);
1035         return FALSE;
1036     }
1037     return TRUE;
1038 }
1039
1040
1041 /***********************************************************************
1042  *           SetCurrentDirectory32W   (KERNEL32.480)
1043  */
1044 BOOL WINAPI SetCurrentDirectoryW( LPCWSTR dirW )
1045 {
1046     LPSTR dir = HEAP_strdupWtoA( GetProcessHeap(), 0, dirW );
1047     BOOL res = SetCurrentDirectoryA( dir );
1048     HeapFree( GetProcessHeap(), 0, dir );
1049     return res;
1050 }
1051
1052
1053 /***********************************************************************
1054  *           GetLogicalDriveStrings32A   (KERNEL32.231)
1055  */
1056 UINT WINAPI GetLogicalDriveStringsA( UINT len, LPSTR buffer )
1057 {
1058     int drive, count;
1059
1060     for (drive = count = 0; drive < MAX_DOS_DRIVES; drive++)
1061         if (DRIVE_IsValid(drive)) count++;
1062     if (count * 4 * sizeof(char) <= len)
1063     {
1064         LPSTR p = buffer;
1065         for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
1066             if (DRIVE_IsValid(drive))
1067             {
1068                 *p++ = 'a' + drive;
1069                 *p++ = ':';
1070                 *p++ = '\\';
1071                 *p++ = '\0';
1072             }
1073         *p = '\0';
1074     }
1075     return count * 4 * sizeof(char);
1076 }
1077
1078
1079 /***********************************************************************
1080  *           GetLogicalDriveStrings32W   (KERNEL32.232)
1081  */
1082 UINT WINAPI GetLogicalDriveStringsW( UINT len, LPWSTR buffer )
1083 {
1084     int drive, count;
1085
1086     for (drive = count = 0; drive < MAX_DOS_DRIVES; drive++)
1087         if (DRIVE_IsValid(drive)) count++;
1088     if (count * 4 * sizeof(WCHAR) <= len)
1089     {
1090         LPWSTR p = buffer;
1091         for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
1092             if (DRIVE_IsValid(drive))
1093             {
1094                 *p++ = (WCHAR)('a' + drive);
1095                 *p++ = (WCHAR)':';
1096                 *p++ = (WCHAR)'\\';
1097                 *p++ = (WCHAR)'\0';
1098             }
1099         *p = (WCHAR)'\0';
1100     }
1101     return count * 4 * sizeof(WCHAR);
1102 }
1103
1104
1105 /***********************************************************************
1106  *           GetLogicalDrives   (KERNEL32.233)
1107  */
1108 DWORD WINAPI GetLogicalDrives(void)
1109 {
1110     DWORD ret = 0;
1111     int drive;
1112
1113     for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
1114         if (DRIVE_IsValid(drive)) ret |= (1 << drive);
1115     return ret;
1116 }
1117
1118
1119 /***********************************************************************
1120  *           GetVolumeInformation32A   (KERNEL32.309)
1121  */
1122 BOOL WINAPI GetVolumeInformationA( LPCSTR root, LPSTR label,
1123                                        DWORD label_len, DWORD *serial,
1124                                        DWORD *filename_len, DWORD *flags,
1125                                        LPSTR fsname, DWORD fsname_len )
1126 {
1127     int drive;
1128     char *cp;
1129
1130     /* FIXME, SetLastErrors missing */
1131
1132     if (!root) drive = DRIVE_GetCurrentDrive();
1133     else
1134     {
1135         if ((root[1]) && (root[1] != ':'))
1136         {
1137             WARN_(dosfs)("invalid root '%s'\n",root);
1138             return FALSE;
1139         }
1140         drive = toupper(root[0]) - 'A';
1141     }
1142     if (!DRIVE_IsValid( drive )) return FALSE;
1143     if (label)
1144     {
1145        lstrcpynA( label, DRIVE_GetLabel(drive), label_len );
1146        for (cp = label; *cp; cp++);
1147        while (cp != label && *(cp-1) == ' ') cp--;
1148        *cp = '\0';
1149     }
1150     if (serial) *serial = DRIVE_GetSerialNumber(drive);
1151
1152     /* Set the filesystem information */
1153     /* Note: we only emulate a FAT fs at the present */
1154
1155     if (filename_len) {
1156         if (DOSDrives[drive].flags & DRIVE_SHORT_NAMES)
1157             *filename_len = 12;
1158         else
1159             *filename_len = 255;
1160     }
1161     if (flags)
1162       {
1163        *flags=0;
1164        if (DOSDrives[drive].flags & DRIVE_CASE_SENSITIVE)
1165          *flags|=FS_CASE_SENSITIVE;
1166        if (DOSDrives[drive].flags & DRIVE_CASE_PRESERVING)
1167          *flags|=FS_CASE_IS_PRESERVED ;
1168       }
1169     if (fsname) {
1170         /* Diablo checks that return code ... */
1171         if (DRIVE_GetType(drive)==TYPE_CDROM)
1172             lstrcpynA( fsname, "CDFS", fsname_len );
1173         else
1174             lstrcpynA( fsname, "FAT", fsname_len );
1175     }
1176     return TRUE;
1177 }
1178
1179
1180 /***********************************************************************
1181  *           GetVolumeInformation32W   (KERNEL32.310)
1182  */
1183 BOOL WINAPI GetVolumeInformationW( LPCWSTR root, LPWSTR label,
1184                                        DWORD label_len, DWORD *serial,
1185                                        DWORD *filename_len, DWORD *flags,
1186                                        LPWSTR fsname, DWORD fsname_len )
1187 {
1188     LPSTR xroot    = HEAP_strdupWtoA( GetProcessHeap(), 0, root );
1189     LPSTR xvolname = label ? HeapAlloc(GetProcessHeap(),0,label_len) : NULL;
1190     LPSTR xfsname  = fsname ? HeapAlloc(GetProcessHeap(),0,fsname_len) : NULL;
1191     BOOL ret = GetVolumeInformationA( xroot, xvolname, label_len, serial,
1192                                           filename_len, flags, xfsname,
1193                                           fsname_len );
1194     if (ret)
1195     {
1196         if (label) lstrcpyAtoW( label, xvolname );
1197         if (fsname) lstrcpyAtoW( fsname, xfsname );
1198     }
1199     HeapFree( GetProcessHeap(), 0, xroot );
1200     HeapFree( GetProcessHeap(), 0, xvolname );
1201     HeapFree( GetProcessHeap(), 0, xfsname );
1202     return ret;
1203 }
1204
1205 BOOL WINAPI SetVolumeLabelA(LPCSTR rootpath,LPCSTR volname) {
1206         FIXME_(dosfs)("(%s,%s),stub!\n",rootpath,volname);
1207         return TRUE;
1208 }