msdos/int21.c

   1 /*
   2  * DOS interrupt 21h handler
   3  *
   4  * Copyright 1993, 1994 Erik Bos
   5  * Copyright 1996 Alexandre Julliard
   6  * Copyright 1997 Andreas Mohr
   7  * Copyright 1998 Uwe Bonnes
   8  * Copyright 1998, 1999 Ove Kaaven
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <time.h>
  29 #include <fcntl.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #ifdef HAVE_SYS_FILE_H
  33 # include <sys/file.h>
  34 #endif
  35 #include <string.h>
  36 #ifdef HAVE_SYS_TIME_H
  37 # include <sys/time.h>
  38 #endif
  39 #include <sys/types.h>
  40 #ifdef HAVE_UNISTD_H
  41 # include <unistd.h>
  42 #endif
  43 #ifdef HAVE_UTIME_H
  44 # include <utime.h>
  45 #endif
  46 #include <ctype.h>
  47 #include "windef.h"
  48 #include "winbase.h"
  49 #include "winternl.h"
  50 #include "wingdi.h"
  51 #include "winuser.h" /* SW_NORMAL */
  52 #include "wine/winbase16.h"
  53 #include "winerror.h"
  54 #include "drive.h"
  55 #include "file.h"
  56 #include "callback.h"
  57 #include "msdos.h"
  58 #include "miscemu.h"
  59 #include "task.h"
  60 #include "wine/unicode.h"
  61 #include "wine/debug.h"
  62
  63 WINE_DEFAULT_DEBUG_CHANNEL(int21);
  64 #if defined(__svr4__) || defined(_SCO_DS)
  65 /* SVR4 DOESNT do locking the same way must implement properly */
  66 #define LOCK_EX 0
  67 #define LOCK_SH  1
  68 #define LOCK_NB  8
  69 #endif
  70
  71
  72 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
  73
  74 /* Define the drive parameter block, as used by int21/1F
  75  * and int21/32.  This table can be accessed through the
  76  * global 'dpb' pointer, which points into the local dos
  77  * heap.
  78  */
  79 struct DPB
  80 {
  81     BYTE drive_num;         /* 0=A, etc. */
  82     BYTE unit_num;          /* Drive's unit number (?) */
  83     WORD sector_size;       /* Sector size in bytes */
  84     BYTE high_sector;       /* Highest sector in a cluster */
  85     BYTE shift;             /* Shift count (?) */
  86     WORD reserved;          /* Number of reserved sectors at start */
  87     BYTE num_FAT;           /* Number of FATs */
  88     WORD dir_entries;       /* Number of root dir entries */
  89     WORD first_data;        /* First data sector */
  90     WORD high_cluster;      /* Highest cluster number */
  91     WORD sectors_in_FAT;    /* Number of sectors per FAT */
  92     WORD start_dir;         /* Starting sector of first dir */
  93     DWORD driver_head;      /* Address of device driver header (?) */
  94     BYTE media_ID;          /* Media ID */
  95     BYTE access_flag;       /* Prev. accessed flag (0=yes,0xFF=no) */
  96     DWORD next;             /* Pointer to next DPB in list */
  97     WORD free_search;       /* Free cluster search start */
  98     WORD free_clusters;     /* Number of free clusters (0xFFFF=unknown) */
  99 };
 100
 101 struct EDPB                     /* FAT32 extended Drive Parameter Block */
 102 {                               /* from Ralf Brown's Interrupt List */
 103         struct DPB dpb;         /* first 24 bytes = original DPB */
 104
 105         BYTE edpb_flags;        /* undocumented/unknown flags */
 106         DWORD next_edpb;        /* pointer to next EDPB */
 107         WORD free_cluster;      /* cluster to start search for free space on write, typically
 108                                    the last cluster allocated */
 109         WORD clusters_free;     /* number of free clusters on drive or FFFF = unknown */
 110         WORD clusters_free_hi;  /* hiword of clusters_free */
 111         WORD mirroring_flags;   /* mirroring flags: bit 7 set = do not mirror active FAT */
 112                                 /* bits 0-3 = 0-based number of the active FAT */
 113         WORD info_sector;       /* sector number of file system info sector, or FFFF for none */
 114         WORD spare_boot_sector; /* sector number of backup boot sector, or FFFF for none */
 115         DWORD first_cluster;    /* sector number of the first cluster */
 116         DWORD max_cluster;      /* sector number of the last cluster */
 117         DWORD fat_clusters;     /* number of clusters occupied by FAT */
 118         DWORD root_cluster;     /* cluster number of start of root directory */
 119         DWORD free_cluster2;    /* same as free_cluster: cluster at which to start
 120                                    search for free space when writing */
 121
 122 };
 123
 124 DWORD dpbsegptr;
 125
 126 struct DosHeap {
 127         BYTE mediaID;
 128         BYTE biosdate[8];
 129         struct DPB dpb;
 130 };
 131 static struct DosHeap *heap;
 132 static WORD DosHeapHandle;
 133
 134 extern char TempDirectory[];
 135
 136 static void INT21_ReadConfigSys(void)
 137 {
 138     static int done;
 139     if (!done) DOSCONF_ReadConfig();
 140     done = 1;
 141 }
 142
 143 static BOOL INT21_CreateHeap(void)
 144 {
 145     if (!(DosHeapHandle = GlobalAlloc16(GMEM_FIXED,sizeof(struct DosHeap))))
 146     {
 147         WARN("Out of memory\n");
 148         return FALSE;
 149     }
 150     heap = (struct DosHeap *) GlobalLock16(DosHeapHandle);
 151     dpbsegptr = MAKESEGPTR(DosHeapHandle,(int)&heap->dpb-(int)heap);
 152     strcpy(heap->biosdate, "01/01/80");
 153     return TRUE;
 154 }
 155
 156 static BYTE *GetCurrentDTA( CONTEXT86 *context )
 157 {
 158     TDB *pTask = TASK_GetCurrent();
 159
 160     /* FIXME: This assumes DTA was set correctly! */
 161     return (BYTE *)CTX_SEG_OFF_TO_LIN( context, SELECTOROF(pTask->dta),
 162                                                 (DWORD)OFFSETOF(pTask->dta) );
 163 }
 164
 165
 166 void CreateBPB(int drive, BYTE *data, BOOL16 limited)
 167 /* limited == TRUE is used with INT 0x21/0x440d */
 168 {
 169         if (drive > 1) {
 170                 setword(data, 512);
 171                 data[2] = 2;
 172                 setword(&data[3], 0);
 173                 data[5] = 2;
 174                 setword(&data[6], 240);
 175                 setword(&data[8], 64000);
 176                 data[0x0a] = 0xf8;
 177                 setword(&data[0x0b], 40);
 178                 setword(&data[0x0d], 56);
 179                 setword(&data[0x0f], 2);
 180                 setword(&data[0x11], 0);
 181                 if (!limited) {
 182                     setword(&data[0x1f], 800);
 183                     data[0x21] = 5;
 184                     setword(&data[0x22], 1);
 185                 }
 186         } else { /* 1.44mb */
 187                 setword(data, 512);
 188                 data[2] = 2;
 189                 setword(&data[3], 0);
 190                 data[5] = 2;
 191                 setword(&data[6], 240);
 192                 setword(&data[8], 2880);
 193                 data[0x0a] = 0xf8;
 194                 setword(&data[0x0b], 6);
 195                 setword(&data[0x0d], 18);
 196                 setword(&data[0x0f], 2);
 197                 setword(&data[0x11], 0);
 198                 if (!limited) {
 199                     setword(&data[0x1f], 80);
 200                     data[0x21] = 7;
 201                     setword(&data[0x22], 2);
 202                 }
 203         }
 204 }
 205
 206 static int INT21_GetFreeDiskSpace( CONTEXT86 *context )
 207 {
 208     DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
 209     char root[] = "A:\\";
 210
 211     *root += DOS_GET_DRIVE( DL_reg(context) );
 212     if (!GetDiskFreeSpaceA( root, &cluster_sectors, &sector_bytes,
 213                               &free_clusters, &total_clusters )) return 0;
 214     SET_AX( context, cluster_sectors );
 215     SET_BX( context, free_clusters );
 216     SET_CX( context, sector_bytes );
 217     SET_DX( context, total_clusters );
 218     return 1;
 219 }
 220
 221 static int INT21_GetDriveAllocInfo( CONTEXT86 *context )
 222 {
 223     if (!INT21_GetFreeDiskSpace( context )) return 0;
 224     if (!heap && !INT21_CreateHeap()) return 0;
 225     heap->mediaID = 0xf0;
 226     context->SegDs = DosHeapHandle;
 227     SET_BX( context, (int)&heap->mediaID - (int)heap );
 228     return 1;
 229 }
 230
 231 static int FillInDrivePB( int drive )
 232 {
 233         if(!DRIVE_IsValid(drive))
 234         {
 235             SetLastError( ERROR_INVALID_DRIVE );
 236                         return 0;
 237         }
 238         else if (heap || INT21_CreateHeap())
 239         {
 240                 /* FIXME: I have no idea what a lot of this information should
 241                  * say or whether it even really matters since we're not allowing
 242                  * direct block access.  However, some programs seem to depend on
 243                  * getting at least _something_ back from here.  The 'next' pointer
 244                  * does worry me, though.  Should we have a complete table of
 245                  * separate DPBs per drive?  Probably, but I'm lazy. :-)  -CH
 246                  */
 247                 heap->dpb.drive_num = heap->dpb.unit_num = drive; /*The same?*/
 248                 heap->dpb.sector_size = 512;
 249                 heap->dpb.high_sector = 1;
 250                 heap->dpb.shift = drive < 2 ? 0 : 6; /*6 for HD, 0 for floppy*/
 251                 heap->dpb.reserved = 0;
 252                 heap->dpb.num_FAT = 1;
 253                 heap->dpb.dir_entries = 2;
 254                 heap->dpb.first_data = 2;
 255                 heap->dpb.high_cluster = 64000;
 256                 heap->dpb.sectors_in_FAT = 1;
 257                 heap->dpb.start_dir = 1;
 258                 heap->dpb.driver_head = 0;
 259                 heap->dpb.media_ID = (drive > 1) ? 0xF8 : 0xF0;
 260                 heap->dpb.access_flag = 0;
 261                 heap->dpb.next = 0;
 262                 heap->dpb.free_search = 0;
 263                 heap->dpb.free_clusters = 0xFFFF;    /* unknown */
 264                                 return 1;
 265                 }
 266
 267                 return 0;
 268 }
 269
 270 static void GetDrivePB( CONTEXT86 *context, int drive )
 271 {
 272         if (FillInDrivePB( drive ))
 273         {
 274                 SET_AL( context, 0x00 );
 275                 context->SegDs = SELECTOROF(dpbsegptr);
 276                 SET_BX( context, OFFSETOF(dpbsegptr) );
 277         }
 278         else
 279         {
 280         SET_AX( context, 0x00ff );
 281         }
 282 }
 283
 284
 285 static void ioctlGetDeviceInfo( CONTEXT86 *context )
 286 {
 287     int curr_drive;
 288     const DOS_DEVICE *dev;
 289
 290     TRACE("(%d)\n", BX_reg(context));
 291
 292     RESET_CFLAG(context);
 293
 294     /* DOS device ? */
 295     if ((dev = DOSFS_GetDeviceByHandle( DosFileHandleToWin32Handle(BX_reg(context)) )))
 296     {
 297         SET_DX( context, dev->flags );
 298         return;
 299     }
 300
 301     /* it seems to be a file */
 302     curr_drive = DRIVE_GetCurrentDrive();
 303     SET_DX( context, 0x0140 + curr_drive + ((curr_drive > 1) ? 0x0800 : 0) );
 304     /* no floppy */
 305     /* bits 0-5 are current drive
 306      * bit 6 - file has NOT been written..FIXME: correct?
 307      * bit 8 - generate int24 if no diskspace on write/ read past end of file
 308      * bit 11 - media not removable
 309      * bit 14 - don't set file date/time on closing
 310      * bit 15 - file is remote
 311      */
 312 }
 313
 314 static BOOL ioctlGenericBlkDevReq( CONTEXT86 *context )
 315 {
 316         BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 317         int drive = DOS_GET_DRIVE( BL_reg(context) );
 318
 319         if (!DRIVE_IsValid(drive))
 320         {
 321             SetLastError( ERROR_FILE_NOT_FOUND );
 322             return TRUE;
 323         }
 324
 325         if (CH_reg(context) != 0x08)
 326         {
 327             INT_BARF( context, 0x21 );
 328             return FALSE;
 329         }
 330
 331         switch (CL_reg(context))
 332         {
 333                 case 0x4a: /* lock logical volume */
 334                         TRACE("lock logical volume (%d) level %d mode %d\n",drive,BH_reg(context),DX_reg(context));
 335                         break;
 336
 337                 case 0x60: /* get device parameters */
 338                            /* used by w4wgrp's winfile */
 339                         memset(dataptr, 0, 0x20); /* DOS 6.22 uses 0x20 bytes */
 340                         dataptr[0] = 0x04;
 341                         dataptr[6] = 0; /* media type */
 342                         if (drive > 1)
 343                         {
 344                                 dataptr[1] = 0x05; /* fixed disk */
 345                                 setword(&dataptr[2], 0x01); /* non removable */
 346                                 setword(&dataptr[4], 0x300); /* # of cylinders */
 347                         }
 348                         else
 349                         {
 350                                 dataptr[1] = 0x07; /* block dev, floppy */
 351                                 setword(&dataptr[2], 0x02); /* removable */
 352                                 setword(&dataptr[4], 80); /* # of cylinders */
 353                         }
 354                         CreateBPB(drive, &dataptr[7], TRUE);
 355                         RESET_CFLAG(context);
 356                         break;
 357
 358                 case 0x41: /* write logical device track */
 359                 case 0x61: /* read logical device track */
 360                         {
 361                                 BYTE drive = BL_reg(context) ?
 362                                                 BL_reg(context) : DRIVE_GetCurrentDrive();
 363                                 WORD head   = *(WORD *)dataptr+1;
 364                                 WORD cyl    = *(WORD *)dataptr+3;
 365                                 WORD sect   = *(WORD *)dataptr+5;
 366                                 WORD nrsect = *(WORD *)dataptr+7;
 367                                 BYTE *data  =  (BYTE *)dataptr+9;
 368                                 int (*raw_func)(BYTE, DWORD, DWORD, BYTE *, BOOL);
 369
 370                                 raw_func = (CL_reg(context) == 0x41) ?
 371                                                                 DRIVE_RawWrite : DRIVE_RawRead;
 372
 373                                 if (raw_func(drive, head*cyl*sect, nrsect, data, FALSE))
 374                                         RESET_CFLAG(context);
 375                                 else
 376                                 {
 377                                         SET_AX( context, 0x1e ); /* read fault */
 378                                         SET_CFLAG(context);
 379                                 }
 380                         }
 381                         break;
 382                 case 0x66:/*  get disk serial number */
 383                         {
 384                                 char    label[12],fsname[9],path[4];
 385                                 DWORD   serial;
 386
 387                                 strcpy(path,"x:\\");path[0]=drive+'A';
 388                                 GetVolumeInformationA(
 389                                         path,label,12,&serial,NULL,NULL,fsname,9
 390                                 );
 391                                 *(WORD*)dataptr         = 0;
 392                                 memcpy(dataptr+2,&serial,4);
 393                                 memcpy(dataptr+6,label  ,11);
 394                                 memcpy(dataptr+17,fsname,8);
 395                         }
 396                         break;
 397
 398                 case 0x6a:
 399                         TRACE("logical volume %d unlocked.\n",drive);
 400                         break;
 401
 402                 case 0x6f:
 403                         memset(dataptr+1, '\0', dataptr[0]-1);
 404                         dataptr[1] = dataptr[0];
 405                         dataptr[2] = 0x07; /* protected mode driver; no eject; no notification */
 406                         dataptr[3] = 0xFF; /* no physical drive */
 407                         break;
 408
 409                 case 0x72:
 410                         /* Trail on error implementation */
 411                         SET_AX( context, GetDriveType16(BL_reg(context)) == DRIVE_UNKNOWN ? 0x0f : 0x01 );
 412                         SET_CFLAG(context);     /* Seems to be set all the time */
 413                         break;
 414
 415                 default:
 416                         INT_BARF( context, 0x21 );
 417         }
 418         return FALSE;
 419 }
 420
 421 static void INT21_ParseFileNameIntoFCB( CONTEXT86 *context )
 422 {
 423     char *filename =
 424         CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Esi );
 425     char *fcb =
 426         CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Edi );
 427     char *s;
 428     WCHAR *buffer;
 429     WCHAR fcbW[12];
 430     INT buffer_len, len;
 431
 432     SET_AL( context, 0xff ); /* failed */
 433
 434     TRACE("filename: '%s'\n", filename);
 435
 436     s = filename;
 437     len = 0;
 438     while (*s)
 439     {
 440         if ((*s != ' ') && (*s != '\r') && (*s != '\n'))
 441         {
 442             s++;
 443             len++;
 444         }
 445         else
 446             break;
 447     }
 448
 449     buffer_len = MultiByteToWideChar(CP_OEMCP, 0, filename, len, NULL, 0);
 450     buffer = HeapAlloc( GetProcessHeap(), 0, (buffer_len + 1) * sizeof(WCHAR));
 451     len = MultiByteToWideChar(CP_OEMCP, 0, filename, len, buffer, buffer_len);
 452     buffer[len] = 0;
 453     DOSFS_ToDosFCBFormat(buffer, fcbW);
 454     HeapFree(GetProcessHeap(), 0, buffer);
 455     WideCharToMultiByte(CP_OEMCP, 0, fcbW, 12, fcb + 1, 12, NULL, NULL);
 456     *fcb = 0;
 457     TRACE("FCB: '%s'\n", fcb + 1);
 458
 459     SET_AL( context, ((strchr(filename, '*')) || (strchr(filename, '$'))) != 0 );
 460
 461     /* point DS:SI to first unparsed character */
 462     SET_SI( context, context->Esi + (int)s - (int)filename );
 463 }
 464
 465
 466 /* Many calls translate a drive argument like this:
 467    drive number (00h = default, 01h = A:, etc)
 468    */
 469 static char drivestring[]="default";
 470
 471 char *INT21_DriveName(int drive)
 472 {
 473
 474     if(drive >0)
 475       {
 476         drivestring[0]= (unsigned char)drive + '@';
 477         drivestring[1]=':';
 478         drivestring[2]=0;
 479       }
 480     return drivestring;
 481 }
 482 static BOOL INT21_CreateFile( CONTEXT86 *context )
 483 {
 484     SET_AX( context, _lcreat16( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
 485                                                    context->Edx ), CX_reg(context) ) );
 486     return (AX_reg(context) == (WORD)HFILE_ERROR16);
 487 }
 488
 489 static HFILE16 _lcreat16_uniq( LPCSTR path, INT attr )
 490 {
 491     /* Mask off all flags not explicitly allowed by the doc */
 492     attr &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
 493     return Win32HandleToDosFileHandle( CreateFileA( path, GENERIC_READ | GENERIC_WRITE,
 494                                              FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
 495                                              CREATE_NEW, attr, 0 ));
 496 }
 497
 498 static void OpenExistingFile( CONTEXT86 *context )
 499 {
 500     SET_AX( context, _lopen16( CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx),
 501                                AL_reg(context) ));
 502     if (AX_reg(context) == (WORD)HFILE_ERROR16)
 503     {
 504         SET_AX( context, GetLastError() );
 505         SET_CFLAG(context);
 506     }
 507 }
 508
 509 static BOOL INT21_ExtendedOpenCreateFile(CONTEXT86 *context )
 510 {
 511   BOOL bExtendedError = FALSE;
 512   BYTE action = DL_reg(context);
 513
 514   /* Shuffle arguments to call OpenExistingFile */
 515   SET_AL( context, BL_reg(context) );
 516   SET_DX( context, SI_reg(context) );
 517   /* BX,CX and DX should be preserved */
 518   OpenExistingFile(context);
 519
 520   if ((context->EFlags & 0x0001) == 0) /* File exists */
 521   {
 522       UINT16    uReturnCX = 0;
 523
 524       /* Now decide what do do */
 525
 526       if ((action & 0x07) == 0)
 527       {
 528           _lclose16( AX_reg(context) );
 529           SET_AX( context, 0x0050 );    /*File exists*/
 530           SET_CFLAG(context);
 531           WARN("extended open/create: failed because file exists \n");
 532       }
 533       else if ((action & 0x07) == 2)
 534       {
 535         /* Truncate it, but first check if opened for write */
 536         if ((BL_reg(context) & 0x0007)== 0)
 537         {
 538             _lclose16( AX_reg(context) );
 539             WARN("extended open/create: failed, trunc on ro file\n");
 540             SET_AX( context, 0x000C );  /*Access code invalid*/
 541             SET_CFLAG(context);
 542         }
 543         else
 544         {
 545                 TRACE("extended open/create: Closing before truncate\n");
 546                 if (_lclose16( AX_reg(context) ))
 547                 {
 548                    WARN("extended open/create: close before trunc failed\n");
 549                    SET_AX( context, 0x0019 );   /*Seek Error*/
 550                    SET_CX( context, 0 );
 551                    SET_CFLAG(context);
 552                 }
 553                 /* Shuffle arguments to call CreateFile */
 554
 555                 TRACE("extended open/create: Truncating\n");
 556                 SET_AL( context, BL_reg(context) );
 557                 /* CX is still the same */
 558                 SET_DX( context, SI_reg(context) );
 559                 bExtendedError = INT21_CreateFile(context);
 560
 561                 if (context->EFlags & 0x0001)   /*no file open, flags set */
 562                 {
 563                     WARN("extended open/create: trunc failed\n");
 564                     return bExtendedError;
 565                 }
 566                 uReturnCX = 0x3;
 567         }
 568       }
 569       else uReturnCX = 0x1;
 570
 571       SET_CX( context, uReturnCX );
 572   }
 573   else /* file does not exist */
 574   {
 575       RESET_CFLAG(context); /* was set by OpenExistingFile(context) */
 576       if ((action & 0xF0)== 0)
 577       {
 578         SET_CX( context, 0 );
 579         SET_CFLAG(context);
 580         WARN("extended open/create: failed, file dosen't exist\n");
 581       }
 582       else
 583       {
 584         /* Shuffle arguments to call CreateFile */
 585         TRACE("extended open/create: Creating\n");
 586         SET_AL( context, BL_reg(context) );
 587         /* CX should still be the same */
 588         SET_DX( context, SI_reg(context) );
 589         bExtendedError = INT21_CreateFile(context);
 590         if (context->EFlags & 0x0001)  /*no file open, flags set */
 591         {
 592             WARN("extended open/create: create failed\n");
 593             return bExtendedError;
 594         }
 595         SET_CX( context, 2 );
 596       }
 597   }
 598
 599   return bExtendedError;
 600 }
 601
 602
 603 static BOOL INT21_ChangeDir( CONTEXT86 *context )
 604 {
 605     int drive;
 606     char *dirname = CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx);
 607     WCHAR dirnameW[MAX_PATH];
 608
 609     TRACE("changedir %s\n", dirname);
 610     if (dirname[0] && (dirname[1] == ':'))
 611     {
 612         drive = toupper(dirname[0]) - 'A';
 613         dirname += 2;
 614     }
 615     else drive = DRIVE_GetCurrentDrive();
 616     MultiByteToWideChar(CP_OEMCP, 0, dirname, -1, dirnameW, MAX_PATH);
 617     return DRIVE_Chdir( drive, dirnameW );
 618 }
 619
 620
 621 static int INT21_FindFirst( CONTEXT86 *context )
 622 {
 623     char *p;
 624     const char *path;
 625     DOS_FULL_NAME full_name;
 626     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA(context);
 627     WCHAR pathW[MAX_PATH];
 628     WCHAR maskW[12];
 629
 630     path = (const char *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 631     MultiByteToWideChar(CP_OEMCP, 0, path, -1, pathW, MAX_PATH);
 632
 633     dta->unixPath = NULL;
 634     if (!DOSFS_GetFullName( pathW, FALSE, &full_name ))
 635     {
 636         SET_AX( context, GetLastError() );
 637         SET_CFLAG(context);
 638         return 0;
 639     }
 640     dta->unixPath = HeapAlloc( GetProcessHeap(), 0, strlen(full_name.long_name)+1 );
 641     strcpy( dta->unixPath, full_name.long_name );
 642     p = strrchr( dta->unixPath, '/' );
 643     *p = '\0';
 644
 645     MultiByteToWideChar(CP_OEMCP, 0, p + 1, -1, pathW, MAX_PATH);
 646
 647     /* Note: terminating NULL in dta->mask overwrites dta->search_attr
 648      *       (doesn't matter as it is set below anyway)
 649      */
 650     if (!DOSFS_ToDosFCBFormat( pathW, maskW ))
 651     {
 652         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 653         dta->unixPath = NULL;
 654         SetLastError( ERROR_FILE_NOT_FOUND );
 655         SET_AX( context, ERROR_FILE_NOT_FOUND );
 656         SET_CFLAG(context);
 657         return 0;
 658     }
 659     WideCharToMultiByte(CP_OEMCP, 0, maskW, 12, dta->mask, sizeof(dta->mask), NULL, NULL);
 660     dta->drive = (path[0] && (path[1] == ':')) ? toupper(path[0]) - 'A'
 661                                                : DRIVE_GetCurrentDrive();
 662     dta->count = 0;
 663     dta->search_attr = CL_reg(context);
 664     return 1;
 665 }
 666
 667
 668 static int INT21_FindNext( CONTEXT86 *context )
 669 {
 670     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA(context);
 671     WIN32_FIND_DATAA entry;
 672     int count;
 673
 674     if (!dta->unixPath) return 0;
 675     if (!(count = DOSFS_FindNext( dta->unixPath, dta->mask, NULL, dta->drive,
 676                                   dta->search_attr, dta->count, &entry )))
 677     {
 678         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 679         dta->unixPath = NULL;
 680         return 0;
 681     }
 682     if ((int)dta->count + count > 0xffff)
 683     {
 684         WARN("Too many directory entries in %s\n", dta->unixPath );
 685         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 686         dta->unixPath = NULL;
 687         return 0;
 688     }
 689     dta->count += count;
 690     dta->fileattr = entry.dwFileAttributes;
 691     dta->filesize = entry.nFileSizeLow;
 692     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 693                            &dta->filedate, &dta->filetime );
 694     strcpy( dta->filename, entry.cAlternateFileName );
 695     if (!memchr(dta->mask,'?',11)) {
 696         /* wildcardless search, release resources in case no findnext will
 697          * be issued, and as a workaround in case file creation messes up
 698          * findnext, as sometimes happens with pkunzip */
 699         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 700         dta->unixPath = NULL;
 701     }
 702     return 1;
 703 }
 704
 705
 706 static BOOL INT21_CreateTempFile( CONTEXT86 *context )
 707 {
 708     static int counter = 0;
 709     char *name = CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx );
 710     char *p = name + strlen(name);
 711
 712     /* despite what Ralf Brown says, some programs seem to call without
 713      * ending backslash (DOS accepts that, so we accept it too) */
 714     if ((p == name) || (p[-1] != '\\')) *p++ = '\\';
 715
 716     for (;;)
 717     {
 718         sprintf( p, "wine%04x.%03d", (int)getpid(), counter );
 719         counter = (counter + 1) % 1000;
 720
 721         SET_AX( context, _lcreat16_uniq( name, 0 ) );
 722         if (AX_reg(context) != HFILE_ERROR16)
 723         {
 724             TRACE("created %s\n", name );
 725             return TRUE;
 726         }
 727         if (GetLastError() != ERROR_FILE_EXISTS) return FALSE;
 728     }
 729 }
 730
 731
 732 static BOOL INT21_GetCurrentDirectory( CONTEXT86 *context )
 733 {
 734     int drive = DOS_GET_DRIVE( DL_reg(context) );
 735     char *ptr = (char *)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Esi );
 736
 737     if (!DRIVE_IsValid(drive))
 738     {
 739         SetLastError( ERROR_INVALID_DRIVE );
 740         return FALSE;
 741     }
 742     WideCharToMultiByte(CP_OEMCP, 0, DRIVE_GetDosCwd(drive), -1, ptr, 64, NULL, NULL);
 743     ptr[63] = 0; /* ensure 0 termination */
 744     SET_AX( context, 0x0100 );                       /* success return code */
 745     return TRUE;
 746 }
 747
 748
 749 static int INT21_GetDiskSerialNumber( CONTEXT86 *context )
 750 {
 751     BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 752     int drive = DOS_GET_DRIVE( BL_reg(context) );
 753
 754     if (!DRIVE_IsValid(drive))
 755     {
 756         SetLastError( ERROR_INVALID_DRIVE );
 757         return 0;
 758     }
 759
 760     *(WORD *)dataptr = 0;
 761     *(DWORD *)(dataptr + 2) = DRIVE_GetSerialNumber( drive );
 762     memcpy( dataptr + 6, DRIVE_GetLabel( drive ), 11 );
 763     strncpy(dataptr + 0x11, "FAT16   ", 8);
 764     return 1;
 765 }
 766
 767
 768 static int INT21_SetDiskSerialNumber( CONTEXT86 *context )
 769 {
 770     BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 771     int drive = DOS_GET_DRIVE( BL_reg(context) );
 772
 773     if (!DRIVE_IsValid(drive))
 774     {
 775         SetLastError( ERROR_INVALID_DRIVE );
 776         return 0;
 777     }
 778
 779     DRIVE_SetSerialNumber( drive, *(DWORD *)(dataptr + 2) );
 780     return 1;
 781 }
 782
 783
 784 /* microsoft's programmers should be shot for using CP/M style int21
 785    calls in Windows for Workgroup's winfile.exe */
 786
 787 static int INT21_FindFirstFCB( CONTEXT86 *context )
 788 {
 789     BYTE *fcb = (BYTE *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 790     FINDFILE_FCB *pFCB;
 791     LPCSTR root, cwd;
 792     int drive;
 793
 794     if (*fcb == 0xff) pFCB = (FINDFILE_FCB *)(fcb + 7);
 795     else pFCB = (FINDFILE_FCB *)fcb;
 796     drive = DOS_GET_DRIVE( pFCB->drive );
 797     if (!DRIVE_IsValid( drive )) return 0;
 798     root = DRIVE_GetRoot( drive );
 799     cwd  = DRIVE_GetUnixCwd( drive );
 800     pFCB->unixPath = HeapAlloc( GetProcessHeap(), 0,
 801                                 strlen(root)+strlen(cwd)+2 );
 802     if (!pFCB->unixPath) return 0;
 803     strcpy( pFCB->unixPath, root );
 804     strcat( pFCB->unixPath, "/" );
 805     strcat( pFCB->unixPath, cwd );
 806     pFCB->count = 0;
 807     return 1;
 808 }
 809
 810
 811 static int INT21_FindNextFCB( CONTEXT86 *context )
 812 {
 813     BYTE *fcb = (BYTE *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 814     FINDFILE_FCB *pFCB;
 815     DOS_DIRENTRY_LAYOUT *pResult = (DOS_DIRENTRY_LAYOUT *)GetCurrentDTA(context);
 816     WIN32_FIND_DATAA entry;
 817     BYTE attr;
 818     int count;
 819
 820     if (*fcb == 0xff) /* extended FCB ? */
 821     {
 822         attr = fcb[6];
 823         pFCB = (FINDFILE_FCB *)(fcb + 7);
 824     }
 825     else
 826     {
 827         attr = 0;
 828         pFCB = (FINDFILE_FCB *)fcb;
 829     }
 830
 831     if (!pFCB->unixPath) return 0;
 832     if (!(count = DOSFS_FindNext( pFCB->unixPath, pFCB->filename, NULL,
 833                                   DOS_GET_DRIVE( pFCB->drive ), attr,
 834                                   pFCB->count, &entry )))
 835     {
 836         HeapFree( GetProcessHeap(), 0, pFCB->unixPath );
 837         pFCB->unixPath = NULL;
 838         return 0;
 839     }
 840     pFCB->count += count;
 841
 842     if (*fcb == 0xff) { /* place extended FCB header before pResult if called with extended FCB */
 843         *(BYTE *)pResult = 0xff;
 844         (BYTE *)pResult +=6; /* leave reserved field behind */
 845         *(BYTE *)pResult = entry.dwFileAttributes;
 846         ((BYTE *)pResult)++;
 847     }
 848     *(BYTE *)pResult = DOS_GET_DRIVE( pFCB->drive ); /* DOS_DIRENTRY_LAYOUT after current drive number */
 849     ((BYTE *)pResult)++;
 850     pResult->fileattr = entry.dwFileAttributes;
 851     pResult->cluster  = 0;  /* what else? */
 852     pResult->filesize = entry.nFileSizeLow;
 853     memset( pResult->reserved, 0, sizeof(pResult->reserved) );
 854     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 855                            &pResult->filedate, &pResult->filetime );
 856
 857     /* Convert file name to FCB format */
 858
 859     memset( pResult->filename, ' ', sizeof(pResult->filename) );
 860     if (!strcmp( entry.cAlternateFileName, "." )) pResult->filename[0] = '.';
 861     else if (!strcmp( entry.cAlternateFileName, ".." ))
 862         pResult->filename[0] = pResult->filename[1] = '.';
 863     else
 864     {
 865         char *p = strrchr( entry.cAlternateFileName, '.' );
 866         if (p && p[1] && (p != entry.cAlternateFileName))
 867         {
 868             memcpy( pResult->filename, entry.cAlternateFileName,
 869                     min( (p - entry.cAlternateFileName), 8 ) );
 870             memcpy( pResult->filename + 8, p + 1, min( strlen(p), 3 ) );
 871         }
 872         else
 873             memcpy( pResult->filename, entry.cAlternateFileName,
 874                     min( strlen(entry.cAlternateFileName), 8 ) );
 875     }
 876     return 1;
 877 }
 878
 879
 880 static BOOL
 881 INT21_networkfunc (CONTEXT86 *context)
 882 {
 883      switch (AL_reg(context)) {
 884      case 0x00: /* Get machine name. */
 885      {
 886           char *dst = CTX_SEG_OFF_TO_LIN (context,context->SegDs,context->Edx);
 887           TRACE("getting machine name to %p\n", dst);
 888           if (gethostname (dst, 15))
 889           {
 890                WARN("failed!\n");
 891                SetLastError( ER_NoNetwork );
 892                return TRUE;
 893           } else {
 894                int len = strlen (dst);
 895                while (len < 15)
 896                     dst[len++] = ' ';
 897                dst[15] = 0;
 898                SET_CH( context, 1 ); /* Valid */
 899                SET_CL( context, 1 ); /* NETbios number??? */
 900                TRACE("returning %s\n", debugstr_an (dst, 16));
 901                return FALSE;
 902           }
 903      }
 904
 905      default:
 906           SetLastError( ER_NoNetwork );
 907           return TRUE;
 908      }
 909 }
 910
 911
 912 /***********************************************************************
 913  *           INT_Int21Handler
 914  */
 915 void WINAPI INT_Int21Handler( CONTEXT86 *context )
 916 {
 917     BOOL        bSetDOSExtendedError = FALSE;
 918
 919     switch(AH_reg(context))
 920     {
 921     case 0x0e: /* SELECT DEFAULT DRIVE */
 922         TRACE("SELECT DEFAULT DRIVE %d\n", DL_reg(context));
 923         DRIVE_SetCurrentDrive( DL_reg(context) );
 924         SET_AL( context, MAX_DOS_DRIVES );
 925         break;
 926
 927     case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
 928         TRACE("FIND FIRST MATCHING FILE USING FCB %p\n",
 929               CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx));
 930         if (!INT21_FindFirstFCB(context))
 931         {
 932             SET_AL( context, 0xff );
 933             break;
 934         }
 935         /* else fall through */
 936
 937     case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
 938         SET_AL( context, INT21_FindNextFCB(context) ? 0x00 : 0xff );
 939         break;
 940
 941     case 0x19: /* GET CURRENT DEFAULT DRIVE */
 942         SET_AL( context, DRIVE_GetCurrentDrive() );
 943         break;
 944
 945     case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
 946         SET_DL( context, 0 );
 947         if (!INT21_GetDriveAllocInfo(context)) SET_AX( context, 0xffff );
 948         break;
 949
 950     case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
 951         if (!INT21_GetDriveAllocInfo(context)) SET_AX( context, 0xffff );
 952         break;
 953
 954     case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
 955         GetDrivePB(context, DRIVE_GetCurrentDrive());
 956         break;
 957
 958     case 0x29: /* PARSE FILENAME INTO FCB */
 959         INT21_ParseFileNameIntoFCB(context);
 960         break;
 961
 962     case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
 963         TRACE("GET DOS DRIVE PARAMETER BLOCK FOR DRIVE %s\n",
 964               INT21_DriveName( DL_reg(context)));
 965         GetDrivePB(context, DOS_GET_DRIVE( DL_reg(context) ) );
 966         break;
 967
 968     case 0x33: /* MULTIPLEXED */
 969         switch (AL_reg(context))
 970         {
 971               case 0x00: /* GET CURRENT EXTENDED BREAK STATE */
 972                 TRACE("GET CURRENT EXTENDED BREAK STATE\n");
 973                 INT21_ReadConfigSys();
 974                 SET_DL( context, DOSCONF_config.brk_flag );
 975                 break;
 976
 977               case 0x01: /* SET EXTENDED BREAK STATE */
 978                 TRACE("SET CURRENT EXTENDED BREAK STATE\n");
 979                 INT21_ReadConfigSys();
 980                 DOSCONF_config.brk_flag = (DL_reg(context) > 0);
 981                 break;
 982
 983               case 0x02: /* GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE*/
 984                 TRACE("GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE\n");
 985                 INT21_ReadConfigSys();
 986                 /* ugly coding in order to stay reentrant */
 987                 if (DL_reg(context))
 988                 {
 989                     SET_DL( context, DOSCONF_config.brk_flag );
 990                     DOSCONF_config.brk_flag = 1;
 991                 }
 992                 else
 993                 {
 994                     SET_DL( context, DOSCONF_config.brk_flag );
 995                     DOSCONF_config.brk_flag = 0;
 996                 }
 997                 break;
 998
 999               case 0x05: /* GET BOOT DRIVE */
1000                 TRACE("GET BOOT DRIVE\n");
1001                 SET_DL( context, 3 );
1002                 /* c: is Wine's bootdrive (a: is 1)*/
1003                 break;
1004
1005               case 0x06: /* GET TRUE VERSION NUMBER */
1006                 TRACE("GET TRUE VERSION NUMBER\n");
1007                 SET_BX( context, (HIWORD(GetVersion16() >> 8)) | (HIWORD(GetVersion16() << 8)) );
1008                 SET_DX( context, 0x00 );
1009                 break;
1010
1011               default:
1012                 INT_BARF( context, 0x21 );
1013                 break;
1014         }
1015         break;
1016
1017     case 0x36: /* GET FREE DISK SPACE */
1018         TRACE("GET FREE DISK SPACE FOR DRIVE %s\n",
1019               INT21_DriveName( DL_reg(context)));
1020         if (!INT21_GetFreeDiskSpace(context)) SET_AX( context, 0xffff );
1021         break;
1022
1023     case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
1024         TRACE("CHDIR %s\n",
1025               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1026         bSetDOSExtendedError = !INT21_ChangeDir(context);
1027         break;
1028
1029     case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
1030         TRACE("CREAT flag 0x%02x %s\n",CX_reg(context),
1031               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1032         bSetDOSExtendedError = INT21_CreateFile( context );
1033         break;
1034
1035     case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
1036         TRACE("OPEN mode 0x%02x %s\n",AL_reg(context),
1037               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1038         OpenExistingFile(context);
1039         break;
1040
1041     case 0x44: /* IOCTL */
1042         switch (AL_reg(context))
1043         {
1044         case 0x00:
1045             ioctlGetDeviceInfo(context);
1046             break;
1047
1048         case 0x01:
1049             break;
1050
1051         case 0x05:{     /* IOCTL - WRITE TO BLOCK DEVICE CONTROL CHANNEL */
1052             /*BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx);*/
1053             int drive = DOS_GET_DRIVE(BL_reg(context));
1054
1055             FIXME("program tried to write to block device control channel of drive %d:\n",drive);
1056             /* for (i=0;i<CX_reg(context);i++)
1057                 fprintf(stdnimp,"%02x ",dataptr[i]);
1058             fprintf(stdnimp,"\n");*/
1059             SET_AX( context, context->Ecx );
1060             break;
1061         }
1062         case 0x08:   /* Check if drive is removable. */
1063             TRACE("IOCTL - CHECK IF BLOCK DEVICE REMOVABLE for drive %s\n",
1064                  INT21_DriveName( BL_reg(context)));
1065             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1066             {
1067             case DRIVE_UNKNOWN:
1068                 SetLastError( ERROR_INVALID_DRIVE );
1069                 SET_AX( context, ERROR_INVALID_DRIVE );
1070                 SET_CFLAG(context);
1071                 break;
1072             case DRIVE_REMOVABLE:
1073                 SET_AX( context, 0 );      /* removable */
1074                 break;
1075             default:
1076                 SET_AX( context, 1 );   /* not removable */
1077                 break;
1078             }
1079             break;
1080
1081         case 0x09:   /* CHECK IF BLOCK DEVICE REMOTE */
1082             TRACE("IOCTL - CHECK IF BLOCK DEVICE REMOTE for drive %s\n",
1083                  INT21_DriveName( BL_reg(context)));
1084             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1085             {
1086             case DRIVE_UNKNOWN:
1087                 SetLastError( ERROR_INVALID_DRIVE );
1088                 SET_AX( context, ERROR_INVALID_DRIVE );
1089                 SET_CFLAG(context);
1090                 break;
1091             case DRIVE_REMOTE:
1092                 SET_DX( context, (1<<9) | (1<<12) );  /* remote */
1093                 break;
1094             default:
1095                 SET_DX( context, 0 );  /* FIXME: use driver attr here */
1096                 break;
1097             }
1098             break;
1099
1100         case 0x0a: /* check if handle (BX) is remote */
1101             TRACE("IOCTL - CHECK IF HANDLE %d IS REMOTE\n",BX_reg(context));
1102             /* returns DX, bit 15 set if remote, bit 14 set if date/time
1103              * not set on close
1104              */
1105             SET_DX( context, 0 );
1106             break;
1107
1108         case 0x0d:
1109             TRACE("IOCTL - GENERIC BLOCK DEVICE REQUEST %s\n",
1110                   INT21_DriveName( BL_reg(context)));
1111             bSetDOSExtendedError = ioctlGenericBlkDevReq(context);
1112             break;
1113
1114         case 0x0e: /* get logical drive mapping */
1115             TRACE("IOCTL - GET LOGICAL DRIVE MAP for drive %s\n",
1116                   INT21_DriveName( BL_reg(context)));
1117             SET_AL( context, 0 ); /* drive has no mapping - FIXME: may be wrong*/
1118             break;
1119
1120         case 0x0F:   /* Set logical drive mapping */
1121             {
1122             int drive;
1123             TRACE("IOCTL - SET LOGICAL DRIVE MAP for drive %s\n",
1124                   INT21_DriveName( BL_reg(context)));
1125             drive = DOS_GET_DRIVE ( BL_reg(context) );
1126             if ( ! DRIVE_SetLogicalMapping ( drive, drive+1 ) )
1127             {
1128                 SET_CFLAG(context);
1129                 SET_AX( context, 0x000F );  /* invalid drive */
1130             }
1131             break;
1132             }
1133
1134         default:
1135             INT_BARF( context, 0x21 );
1136             break;
1137         }
1138         break;
1139
1140     case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
1141         TRACE("CWD - GET CURRENT DIRECTORY for drive %s\n",
1142               INT21_DriveName( DL_reg(context)));
1143         bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
1144         break;
1145
1146     case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
1147         TRACE("FINDFIRST mask 0x%04x spec %s\n",CX_reg(context),
1148               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1149         if (!INT21_FindFirst(context)) break;
1150         /* fall through */
1151
1152     case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
1153         TRACE("FINDNEXT\n");
1154         if (!INT21_FindNext(context))
1155         {
1156             SetLastError( ERROR_NO_MORE_FILES );
1157             SET_AX( context, ERROR_NO_MORE_FILES );
1158             SET_CFLAG(context);
1159         }
1160         else SET_AX( context, 0 );  /* OK */
1161         break;
1162
1163     case 0x5a: /* CREATE TEMPORARY FILE */
1164         TRACE("CREATE TEMPORARY FILE\n");
1165         bSetDOSExtendedError = !INT21_CreateTempFile(context);
1166         break;
1167
1168     case 0x5b: /* CREATE NEW FILE */
1169         TRACE("CREATE NEW FILE 0x%02x for %s\n", CX_reg(context),
1170               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1171         SET_AX( context,
1172                _lcreat16_uniq( CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx),
1173                                CX_reg(context) ));
1174         bSetDOSExtendedError = (AX_reg(context) != 0);
1175         break;
1176
1177     case 0x5e:
1178         bSetDOSExtendedError = INT21_networkfunc (context);
1179         break;
1180
1181     case 0x5f: /* NETWORK */
1182         switch (AL_reg(context))
1183         {
1184         case 0x07: /* ENABLE DRIVE */
1185             TRACE("ENABLE DRIVE %c:\n",(DL_reg(context)+'A'));
1186             if (!DRIVE_Enable( DL_reg(context) ))
1187             {
1188                 SetLastError( ERROR_INVALID_DRIVE );
1189                 bSetDOSExtendedError = TRUE;
1190             }
1191             break;
1192
1193         case 0x08: /* DISABLE DRIVE */
1194             TRACE("DISABLE DRIVE %c:\n",(DL_reg(context)+'A'));
1195             if (!DRIVE_Disable( DL_reg(context) ))
1196             {
1197                 SetLastError( ERROR_INVALID_DRIVE );
1198                 bSetDOSExtendedError = TRUE;
1199             }
1200             break;
1201
1202         default:
1203             /* network software not installed */
1204             TRACE("NETWORK function AX=%04x not implemented\n",AX_reg(context));
1205             SetLastError( ER_NoNetwork );
1206             bSetDOSExtendedError = TRUE;
1207             break;
1208         }
1209         break;
1210
1211     case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
1212         TRACE("TRUENAME %s\n",
1213               (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Esi));
1214         {
1215             if (!GetFullPathNameA( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
1216                                                         context->Esi), 128,
1217                                      CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1218                                                         context->Edi),NULL))
1219                 bSetDOSExtendedError = TRUE;
1220             else SET_AX( context, 0 );
1221         }
1222         break;
1223
1224     case 0x69: /* DISK SERIAL NUMBER */
1225         switch (AL_reg(context))
1226         {
1227         case 0x00:
1228             TRACE("GET DISK SERIAL NUMBER for drive %s\n",
1229                   INT21_DriveName(BL_reg(context)));
1230             if (!INT21_GetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
1231             else SET_AX( context, 0 );
1232             break;
1233
1234         case 0x01:
1235             TRACE("SET DISK SERIAL NUMBER for drive %s\n",
1236                   INT21_DriveName(BL_reg(context)));
1237             if (!INT21_SetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
1238             else SET_AX( context, 1 );
1239             break;
1240         }
1241         break;
1242
1243     case 0x6C: /* Extended Open/Create*/
1244         TRACE("EXTENDED OPEN/CREATE %s\n",
1245               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edi));
1246         bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
1247         break;
1248
1249     case 0x71: /* MS-DOS 7 (Windows95) - LONG FILENAME FUNCTIONS */
1250         switch(AL_reg(context))
1251         {
1252         case 0x47:  /* Get current directory */
1253             TRACE(" LONG FILENAME - GET CURRENT DIRECTORY for drive %s\n",
1254                   INT21_DriveName(DL_reg(context)));
1255             bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
1256             break;
1257
1258         case 0x4e:  /* Find first file */
1259             TRACE(" LONG FILENAME - FIND FIRST MATCHING FILE for %s\n",
1260                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx));
1261             /* FIXME: use attributes in CX */
1262             SET_AX( context, FindFirstFile16(
1263                         CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx),
1264                         (WIN32_FIND_DATAA *)CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1265                                                                context->Edi)));
1266             if (AX_reg(context) == INVALID_HANDLE_VALUE16)
1267                 bSetDOSExtendedError = TRUE;
1268             break;
1269         case 0x4f:  /* Find next file */
1270             TRACE("LONG FILENAME - FIND NEXT MATCHING FILE for handle %d\n",
1271                   BX_reg(context));
1272             if (!FindNextFile16( BX_reg(context),
1273                     (WIN32_FIND_DATAA *)CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1274                                                              context->Edi)))
1275                 bSetDOSExtendedError = TRUE;
1276             break;
1277         case 0xa0:
1278             {
1279                 LPCSTR driveroot = (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs,context->Edx);
1280                 LPSTR buffer = (LPSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegEs,context->Edi);
1281                 DWORD filename_len, flags;
1282
1283                 TRACE("LONG FILENAME - GET VOLUME INFORMATION for drive having root dir '%s'.\n", driveroot);
1284                 SET_AX( context, 0 );
1285                 if (!GetVolumeInformationA( driveroot, NULL, 0, NULL, &filename_len,
1286                                             &flags, buffer, 8 ))
1287                 {
1288                     INT_BARF( context, 0x21 );
1289                     SET_CFLAG(context);
1290                     break;
1291                 }
1292                 SET_BX( context, flags | 0x4000 ); /* support for LFN functions */
1293                 SET_CX( context, filename_len );
1294                 SET_DX( context, MAX_PATH ); /* FIXME: which len if DRIVE_SHORT_NAMES ? */
1295             }
1296             break;
1297         case 0xa1:  /* Find close */
1298             TRACE("LONG FILENAME - FINDCLOSE for handle %d\n",
1299                   BX_reg(context));
1300             bSetDOSExtendedError = (!FindClose16( BX_reg(context) ));
1301             break;
1302         case 0x60:
1303           switch(CL_reg(context))
1304           {
1305             case 0x01:  /* Get short filename or path */
1306               if (!GetShortPathNameA
1307                   ( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
1308                                        context->Esi),
1309                     CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1310                                        context->Edi), 67))
1311                 bSetDOSExtendedError = TRUE;
1312               else SET_AX( context, 0 );
1313               break;
1314             case 0x02:  /* Get canonical long filename or path */
1315               if (!GetFullPathNameA
1316                   ( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
1317                                        context->Esi), 128,
1318                     CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1319                                        context->Edi),NULL))
1320                 bSetDOSExtendedError = TRUE;
1321               else SET_AX( context, 0 );
1322               break;
1323             default:
1324               FIXME("Unimplemented long file name function:\n");
1325               INT_BARF( context, 0x21 );
1326               SET_CFLAG(context);
1327               SET_AL( context, 0 );
1328               break;
1329           }
1330           break;
1331         case 0x6c:  /* Create or open file */
1332             TRACE("LONG FILENAME - CREATE OR OPEN FILE %s\n",
1333                  (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Esi));
1334           /* translate Dos 7 action to Dos 6 action */
1335             bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
1336             break;
1337
1338         case 0x3b:  /* Change directory */
1339             TRACE("LONG FILENAME - CHANGE DIRECTORY %s\n",
1340                  (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1341             if (!SetCurrentDirectoryA(CTX_SEG_OFF_TO_LIN(context,
1342                                                 context->SegDs,
1343                                                 context->Edx
1344                                         ))
1345             ) {
1346                 SET_CFLAG(context);
1347                 SET_AL( context, GetLastError() );
1348             }
1349             break;
1350
1351         default:
1352             FIXME("Unimplemented long file name function:\n");
1353             INT_BARF( context, 0x21 );
1354             SET_CFLAG(context);
1355             SET_AL( context, 0 );
1356             break;
1357         }
1358         break;
1359
1360
1361     case 0x73: /* MULTIPLEXED: Win95 OSR2/Win98 FAT32 calls */
1362         TRACE("windows95 function AX %04x\n",
1363                     AX_reg(context));
1364
1365         switch (AL_reg(context))
1366                 {
1367                 case 0x02:      /* Get Extended Drive Parameter Block for specific drive */
1368                                 /* ES:DI points to word with length of data (should be 0x3d) */
1369                         {
1370                                 WORD *buffer;
1371                                 struct EDPB *edpb;
1372                             DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
1373                             char root[] = "A:\\";
1374
1375                                 buffer = (WORD *)CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Edi);
1376
1377                                 TRACE("Get Extended DPB: linear buffer address is %p\n", buffer);
1378
1379                                 /* validate passed-in buffer lengths */
1380                                 if ((*buffer != 0x3d) || (context->Ecx != 0x3f))
1381                                 {
1382                                         WARN("Get Extended DPB: buffer lengths incorrect\n");
1383                                         WARN("CX = %lx, buffer[0] = %x\n", context->Ecx, *buffer);
1384                                         SET_CFLAG(context);
1385                                         SET_AL( context, 0x18 );                /* bad buffer length */
1386                                 }
1387
1388                                 /* buffer checks out */
1389                                 buffer++;               /* skip over length word now */
1390                                 if (FillInDrivePB( DX_reg(context) ) )
1391                                 {
1392                                         edpb = (struct EDPB *)buffer;
1393
1394                                         /* copy down the old-style DPB portion first */
1395                                         memcpy(&edpb->dpb, &heap->dpb, sizeof(struct DPB));
1396
1397                                         /* now fill in the extended entries */
1398                                         edpb->edpb_flags = 0;
1399                                         edpb->next_edpb = 0;
1400                                         edpb->free_cluster = edpb->free_cluster2 = 0;
1401
1402                                         /* determine free disk space */
1403                                     *root += DOS_GET_DRIVE( DX_reg(context) );
1404                                     GetDiskFreeSpaceA( root, &cluster_sectors, &sector_bytes,
1405                               &free_clusters, &total_clusters );
1406
1407                                         edpb->clusters_free = (free_clusters&0xffff);
1408
1409                                         edpb->clusters_free_hi = free_clusters >> 16;
1410                                         edpb->mirroring_flags = 0;
1411                                         edpb->info_sector = 0xffff;
1412                                         edpb->spare_boot_sector = 0xffff;
1413                                         edpb->first_cluster = 0;
1414                                         edpb->max_cluster = total_clusters;
1415                                         edpb->fat_clusters = 32;        /* made-up value */
1416                                         edpb->root_cluster = 0;
1417
1418                                         RESET_CFLAG(context);   /* clear carry */
1419                                         SET_AX( context, 0 );
1420                                 }
1421                                 else
1422                                 {
1423                                     SET_AX( context, 0x00ff );
1424                                     SET_CFLAG(context);
1425                                 }
1426                         }
1427                         break;
1428
1429                 case 0x03:      /* Get Extended free space on drive */
1430                 case 0x04:  /* Set DPB for formatting */
1431                 case 0x05:  /* extended absolute disk read/write */
1432                         FIXME("Unimplemented FAT32 int32 function %04x\n", AX_reg(context));
1433                         SET_CFLAG(context);
1434                         SET_AL( context, 0 );
1435                         break;
1436                 }
1437
1438                 break;
1439
1440     default:
1441         INT_BARF( context, 0x21 );
1442         break;
1443
1444     } /* END OF SWITCH */
1445
1446     if( bSetDOSExtendedError )          /* set general error condition */
1447     {
1448         SET_AX( context, GetLastError() );
1449         SET_CFLAG(context);
1450     }
1451 }