msdos/int21.c

   1 /*
   2  * DOS interrupt 21h handler
   3  */
   4
   5 #include <time.h>
   6 #include <fcntl.h>
   7 #include <errno.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <sys/file.h>
  11 #include <string.h>
  12 #include <sys/stat.h>
  13 #include <sys/time.h>
  14 #include <sys/types.h>
  15 #include <unistd.h>
  16 #include <utime.h>
  17 #include <ctype.h>
  18 #include "windows.h"
  19 #include "drive.h"
  20 #include "file.h"
  21 #include "heap.h"
  22 #include "msdos.h"
  23 #include "ldt.h"
  24 #include "task.h"
  25 #include "options.h"
  26 #include "miscemu.h"
  27 #include "stddebug.h"
  28 #include "debug.h"
  29 #if defined(__svr4__) || defined(_SCO_DS)
  30 /* SVR4 DOESNT do locking the same way must implement properly */
  31 #define LOCK_EX 0
  32 #define LOCK_SH  1
  33 #define LOCK_NB  8
  34 #endif
  35
  36
  37 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
  38
  39 /* Define the drive parameter block, as used by int21/1F
  40  * and int21/32.  This table can be accessed through the
  41  * global 'dpb' pointer, which points into the local dos
  42  * heap.
  43  */
  44 struct DPB
  45 {
  46     BYTE drive_num;         /* 0=A, etc. */
  47     BYTE unit_num;          /* Drive's unit number (?) */
  48     WORD sector_size;       /* Sector size in bytes */
  49     BYTE high_sector;       /* Highest sector in a cluster */
  50     BYTE shift;             /* Shift count (?) */
  51     WORD reserved;          /* Number of reserved sectors at start */
  52     BYTE num_FAT;           /* Number of FATs */
  53     WORD dir_entries;       /* Number of root dir entries */
  54     WORD first_data;        /* First data sector */
  55     WORD high_cluster;      /* Highest cluster number */
  56     WORD sectors_in_FAT;    /* Number of sectors per FAT */
  57     WORD start_dir;         /* Starting sector of first dir */
  58     DWORD driver_head;      /* Address of device driver header (?) */
  59     BYTE media_ID;          /* Media ID */
  60     BYTE access_flag;       /* Prev. accessed flag (0=yes,0xFF=no) */
  61     DWORD next;             /* Pointer to next DPB in list */
  62     WORD free_search;       /* Free cluster search start */
  63     WORD free_clusters;     /* Number of free clusters (0xFFFF=unknown) */
  64 };
  65
  66 WORD CodePage = 437;
  67 DWORD dpbsegptr;
  68
  69 struct DosHeap {
  70         BYTE InDosFlag;
  71         BYTE mediaID;
  72         BYTE biosdate[8];
  73         struct DPB dpb;
  74 };
  75 static struct DosHeap *heap;
  76 static WORD DosHeapHandle;
  77
  78 WORD sharing_retries = 3;      /* number of retries at sharing violation */
  79 WORD sharing_pause = 1;        /* pause between retries */
  80
  81 extern char TempDirectory[];
  82
  83 static BOOL32 INT21_CreateHeap(void)
  84 {
  85     if (!(DosHeapHandle = GlobalAlloc16(GMEM_FIXED,sizeof(struct DosHeap))))
  86     {
  87         fprintf( stderr, "INT21_Init: Out of memory\n");
  88         return FALSE;
  89     }
  90     heap = (struct DosHeap *) GlobalLock16(DosHeapHandle);
  91     dpbsegptr = PTR_SEG_OFF_TO_SEGPTR(DosHeapHandle,(int)&heap->dpb-(int)heap);
  92     heap->InDosFlag = 0;
  93     strcpy(heap->biosdate, "01/01/80");
  94     return TRUE;
  95 }
  96
  97 static BYTE *GetCurrentDTA(void)
  98 {
  99     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 100     return (BYTE *)PTR_SEG_TO_LIN( pTask->dta );
 101 }
 102
 103
 104 void CreateBPB(int drive, BYTE *data)
 105 {
 106         if (drive > 1) {
 107                 setword(data, 512);
 108                 data[2] = 2;
 109                 setword(&data[3], 0);
 110                 data[5] = 2;
 111                 setword(&data[6], 240);
 112                 setword(&data[8], 64000);
 113                 data[0x0a] = 0xf8;
 114                 setword(&data[0x0b], 40);
 115                 setword(&data[0x0d], 56);
 116                 setword(&data[0x0f], 2);
 117                 setword(&data[0x11], 0);
 118                 setword(&data[0x1f], 800);
 119                 data[0x21] = 5;
 120                 setword(&data[0x22], 1);
 121         } else { /* 1.44mb */
 122                 setword(data, 512);
 123                 data[2] = 2;
 124                 setword(&data[3], 0);
 125                 data[5] = 2;
 126                 setword(&data[6], 240);
 127                 setword(&data[8], 2880);
 128                 data[0x0a] = 0xf8;
 129                 setword(&data[0x0b], 6);
 130                 setword(&data[0x0d], 18);
 131                 setword(&data[0x0f], 2);
 132                 setword(&data[0x11], 0);
 133                 setword(&data[0x1f], 80);
 134                 data[0x21] = 7;
 135                 setword(&data[0x22], 2);
 136         }
 137 }
 138
 139 static int INT21_GetFreeDiskSpace( CONTEXT *context )
 140 {
 141     DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
 142     char root[] = "A:\\";
 143
 144     *root += DOS_GET_DRIVE( DL_reg(context) );
 145     if (!GetDiskFreeSpace32A( root, &cluster_sectors, &sector_bytes,
 146                               &free_clusters, &total_clusters )) return 0;
 147     AX_reg(context) = cluster_sectors;
 148     BX_reg(context) = free_clusters;
 149     CX_reg(context) = sector_bytes;
 150     DX_reg(context) = total_clusters;
 151     return 1;
 152 }
 153
 154 static int INT21_GetDriveAllocInfo( CONTEXT *context )
 155 {
 156     if (!INT21_GetFreeDiskSpace( context )) return 0;
 157     if (!heap && !INT21_CreateHeap()) return 0;
 158     heap->mediaID = 0xf0;
 159     DS_reg(context) = DosHeapHandle;
 160     BX_reg(context) = (int)&heap->mediaID - (int)heap;
 161     return 1;
 162 }
 163
 164 static void GetDrivePB( CONTEXT *context, int drive )
 165 {
 166         if(!DRIVE_IsValid(drive))
 167         {
 168             DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
 169             AX_reg(context) = 0x00ff;
 170         }
 171         else if (heap || INT21_CreateHeap())
 172         {
 173                 dprintf_int(stddeb, "int21: GetDrivePB not fully implemented.\n");
 174
 175                 /* FIXME: I have no idea what a lot of this information should
 176                  * say or whether it even really matters since we're not allowing
 177                  * direct block access.  However, some programs seem to depend on
 178                  * getting at least _something_ back from here.  The 'next' pointer
 179                  * does worry me, though.  Should we have a complete table of
 180                  * separate DPBs per drive?  Probably, but I'm lazy. :-)  -CH
 181                  */
 182                 heap->dpb.drive_num = heap->dpb.unit_num = drive; /*The same?*/
 183                 heap->dpb.sector_size = 512;
 184                 heap->dpb.high_sector = 1;
 185                 heap->dpb.shift = drive < 2 ? 0 : 6; /*6 for HD, 0 for floppy*/
 186                 heap->dpb.reserved = 0;
 187                 heap->dpb.num_FAT = 1;
 188                 heap->dpb.dir_entries = 2;
 189                 heap->dpb.first_data = 2;
 190                 heap->dpb.high_cluster = 64000;
 191                 heap->dpb.sectors_in_FAT = 1;
 192                 heap->dpb.start_dir = 1;
 193                 heap->dpb.driver_head = 0;
 194                 heap->dpb.media_ID = (drive > 1) ? 0xF8 : 0xF0;
 195                 heap->dpb.access_flag = 0;
 196                 heap->dpb.next = 0;
 197                 heap->dpb.free_search = 0;
 198                 heap->dpb.free_clusters = 0xFFFF;    /* unknown */
 199
 200                 AL_reg(context) = 0x00;
 201                 DS_reg(context) = SELECTOROF(dpbsegptr);
 202                 BX_reg(context) = OFFSETOF(dpbsegptr);
 203         }
 204 }
 205
 206
 207 static void ioctlGetDeviceInfo( CONTEXT *context )
 208 {
 209     int curr_drive;
 210     dprintf_int (stddeb, "int21: ioctl (%d, GetDeviceInfo)\n", BX_reg(context));
 211
 212     curr_drive = DRIVE_GetCurrentDrive();
 213     DX_reg(context) = 0x0140 + curr_drive + ((curr_drive > 1) ? 0x0800 : 0); /* no floppy */
 214     /* bits 0-5 are current drive
 215      * bit 6 - file has NOT been written..FIXME: correct?
 216      * bit 8 - generate int24 if no diskspace on write/ read past end of file
 217      * bit 11 - media not removable
 218      */
 219     RESET_CFLAG(context);
 220 }
 221
 222 static BOOL32 ioctlGenericBlkDevReq( CONTEXT *context )
 223 {
 224         BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 225         int drive = DOS_GET_DRIVE( BL_reg(context) );
 226
 227         if (!DRIVE_IsValid(drive))
 228         {
 229             DOS_ERROR( ER_FileNotFound, EC_NotFound, SA_Abort, EL_Disk );
 230             return TRUE;
 231         }
 232
 233         if (CH_reg(context) != 0x08)
 234         {
 235             INT_BARF( context, 0x21 );
 236             return FALSE;
 237         }
 238
 239         switch (CL_reg(context))
 240         {
 241                 case 0x4a: /* lock logical volume */
 242                         dprintf_int(stddeb,"int21: lock logical volume (%d) level %d mode %d\n",drive,BH_reg(context),DX_reg(context));
 243                         break;
 244
 245                 case 0x60: /* get device parameters */
 246                            /* used by w4wgrp's winfile */
 247                         memset(dataptr, 0, 0x26);
 248                         dataptr[0] = 0x04;
 249                         dataptr[6] = 0; /* media type */
 250                         if (drive > 1)
 251                         {
 252                                 dataptr[1] = 0x05; /* fixed disk */
 253                                 setword(&dataptr[2], 0x01); /* non removable */
 254                                 setword(&dataptr[4], 0x300); /* # of cylinders */
 255                         }
 256                         else
 257                         {
 258                                 dataptr[1] = 0x07; /* block dev, floppy */
 259                                 setword(&dataptr[2], 0x02); /* removable */
 260                                 setword(&dataptr[4], 80); /* # of cylinders */
 261                         }
 262                         CreateBPB(drive, &dataptr[7]);
 263                         RESET_CFLAG(context);
 264                         break;
 265
 266                 case 0x66:/*  get disk serial number */
 267                         {
 268                                 char    label[12],fsname[9],path[4];
 269                                 DWORD   serial;
 270
 271                                 strcpy(path,"x:\\");path[0]=drive+'A';
 272                                 GetVolumeInformation32A(
 273                                         path,label,12,&serial,NULL,NULL,fsname,9
 274                                 );
 275                                 *(WORD*)dataptr         = 0;
 276                                 memcpy(dataptr+2,&serial,4);
 277                                 memcpy(dataptr+6,label  ,11);
 278                                 memcpy(dataptr+17,fsname,8);
 279                         }
 280                         break;
 281
 282                 case 0x6a:
 283                         dprintf_int(stddeb,"int21: logical volume %d unlocked.\n",drive);
 284                         break;
 285
 286                 default:
 287                         INT_BARF( context, 0x21 );
 288         }
 289         return FALSE;
 290 }
 291
 292 static void INT21_GetSystemDate( CONTEXT *context )
 293 {
 294     SYSTEMTIME systime;
 295     GetLocalTime( &systime );
 296     CX_reg(context) = systime.wYear;
 297     DX_reg(context) = (systime.wMonth << 8) | systime.wDay;
 298     AX_reg(context) = systime.wDayOfWeek;
 299 }
 300
 301 static void INT21_GetSystemTime( CONTEXT *context )
 302 {
 303     SYSTEMTIME systime;
 304     GetLocalTime( &systime );
 305     CX_reg(context) = (systime.wHour << 8) | systime.wMinute;
 306     DX_reg(context) = (systime.wSecond << 8) | (systime.wMilliseconds / 10);
 307 }
 308
 309 static BOOL32 INT21_CreateFile( CONTEXT *context )
 310 {
 311     AX_reg(context) = _lcreat16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
 312                                           DX_reg(context) ), CX_reg(context) );
 313     return (AX_reg(context) == (WORD)HFILE_ERROR16);
 314 }
 315
 316
 317 static void OpenExistingFile( CONTEXT *context )
 318 {
 319     AX_reg(context) = _lopen16( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
 320                               AL_reg(context) );
 321     if (AX_reg(context) == (WORD)HFILE_ERROR16)
 322     {
 323         AX_reg(context) = DOS_ExtendedError;
 324         SET_CFLAG(context);
 325     }
 326 #if 0
 327     {
 328         int handle;
 329         int mode;
 330         int lock;
 331
 332         switch (AX_reg(context) & 0x0070)
 333         {
 334           case 0x00:    /* compatability mode */
 335           case 0x40:    /* DENYNONE */
 336             lock = -1;
 337             break;
 338
 339           case 0x30:    /* DENYREAD */
 340             dprintf_int(stddeb,
 341               "OpenExistingFile (%s): DENYREAD changed to DENYALL\n",
 342               (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)));
 343           case 0x10:    /* DENYALL */
 344             lock = LOCK_EX;
 345             break;
 346
 347           case 0x20:    /* DENYWRITE */
 348             lock = LOCK_SH;
 349             break;
 350
 351           default:
 352             lock = -1;
 353         }
 354
 355         if (lock != -1)
 356         {
 357
 358           int result,retries=sharing_retries;
 359           {
 360 #if defined(__svr4__) || defined(_SCO_DS)
 361               printf("Should call flock and needs porting to lockf\n");
 362               result = 0;
 363               retries = 0;
 364 #else
 365             result = flock(handle, lock | LOCK_NB);
 366 #endif
 367             if ( retries && (!result) )
 368             {
 369               int i;
 370               for(i=0;i<32768*((int)sharing_pause);i++)
 371                   result++;                          /* stop the optimizer */
 372               for(i=0;i<32768*((int)sharing_pause);i++)
 373                   result--;
 374             }
 375           }
 376           while( (!result) && (!(retries--)) );
 377
 378           if(result)
 379           {
 380             errno_to_doserr();
 381             AX_reg(context) = DOS_ExtendedError;
 382             close(handle);
 383             SET_CFLAG(context);
 384             return;
 385           }
 386
 387         }
 388
 389         Error (0,0,0);
 390         AX_reg(context) = handle;
 391         RESET_CFLAG(context);
 392     }
 393 #endif
 394 }
 395
 396 static void CloseFile( CONTEXT *context )
 397 {
 398     if ((AX_reg(context) = _lclose16( BX_reg(context) )) != 0)
 399     {
 400         AX_reg(context) = DOS_ExtendedError;
 401         SET_CFLAG(context);
 402     }
 403 }
 404
 405 static BOOL32 INT21_ExtendedOpenCreateFile(CONTEXT *context )
 406 {
 407   BOOL32 bExtendedError = FALSE;
 408   BYTE action = DL_reg(context);
 409
 410   /* Shuffle arguments to call OpenExistingFile */
 411   AL_reg(context) = BL_reg(context);
 412   DX_reg(context) = SI_reg(context);
 413   /* BX,CX and DX should be preserved */
 414   OpenExistingFile(context);
 415
 416   if ((EFL_reg(context) & 0x0001) == 0) /* File exists */
 417   {
 418       UINT16    uReturnCX = 0;
 419
 420       /* Now decide what do do */
 421
 422       if ((action & 0x07) == 0)
 423       {
 424           BX_reg(context) = AX_reg(context);
 425           CloseFile(context);
 426           AX_reg(context) = 0x0050;     /*File exists*/
 427           SET_CFLAG(context);
 428           dprintf_int(stddeb, "int21: extended open/create: failed because file exists \n");
 429       }
 430       else if ((action & 0x07) == 2)
 431       {
 432         /* Truncate it, but first check if opened for write */
 433         if ((BL_reg(context) & 0x0007)== 0)
 434         {
 435                   BX_reg(context) = AX_reg(context);
 436                   CloseFile(context);
 437                   dprintf_int(stddeb, "int21: extended open/create: failed, trunc on ro file");
 438                   AX_reg(context) = 0x000C;     /*Access code invalid*/
 439                   SET_CFLAG(context);
 440         }
 441         else
 442         {
 443                 /* Shuffle arguments to call CloseFile while
 444                  * preserving BX and DX */
 445
 446                 dprintf_int(stddeb, "int21: extended open/create: Closing before truncate\n");
 447                 BX_reg(context) = AX_reg(context);
 448                 CloseFile(context);
 449                 if (EFL_reg(context) & 0x0001)
 450                 {
 451                    dprintf_int(stddeb, "int21: extended open/create: close before trunc failed");
 452                    AX_reg(context) = 0x0019;    /*Seek Error*/
 453                    CX_reg(context) = 0;
 454                    SET_CFLAG(context);
 455                 }
 456                 /* Shuffle arguments to call CreateFile */
 457
 458                 dprintf_int(stddeb, "int21: extended open/create: Truncating\n");
 459                 AL_reg(context) = BL_reg(context);
 460                 /* CX is still the same */
 461                 DX_reg(context) = SI_reg(context);
 462                 bExtendedError = INT21_CreateFile(context);
 463
 464                 if (EFL_reg(context) & 0x0001)  /*no file open, flags set */
 465                 {
 466                     dprintf_int(stddeb, "int21: extended open/create: trunc failed");
 467                     return bExtendedError;
 468                 }
 469                 uReturnCX = 0x3;
 470         }
 471       }
 472       else uReturnCX = 0x1;
 473
 474       CX_reg(context) = uReturnCX;
 475   }
 476   else /* file does not exist */
 477   {
 478       RESET_CFLAG(context); /* was set by OpenExistingFile(context) */
 479       if ((action & 0xF0)== 0)
 480       {
 481         CX_reg(context) = 0;
 482         SET_CFLAG(context);
 483         dprintf_int(stddeb, "int21: extended open/create: failed, file dosen't exist\n");
 484       }
 485       else
 486       {
 487         /* Shuffle arguments to call CreateFile */
 488         dprintf_int(stddeb, "int21: extended open/create: Creating\n");
 489         AL_reg(context) = BL_reg(context);
 490         /* CX should still be the same */
 491         DX_reg(context) = SI_reg(context);
 492         bExtendedError = INT21_CreateFile(context);
 493         if (EFL_reg(context) & 0x0001)  /*no file open, flags set */
 494         {
 495             dprintf_int(stddeb, "int21: extended open/create: create failed\n");
 496             return bExtendedError;
 497         }
 498         CX_reg(context) = 2;
 499       }
 500   }
 501
 502   return bExtendedError;
 503 }
 504
 505
 506 static BOOL32 INT21_ChangeDir( CONTEXT *context )
 507 {
 508     int drive;
 509     char *dirname = PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context));
 510
 511     dprintf_int(stddeb,"int21: changedir %s\n", dirname);
 512     if (dirname[0] && (dirname[1] == ':'))
 513     {
 514         drive = toupper(dirname[0]) - 'A';
 515         dirname += 2;
 516     }
 517     else drive = DRIVE_GetCurrentDrive();
 518     return DRIVE_Chdir( drive, dirname );
 519 }
 520
 521
 522 static int INT21_FindFirst( CONTEXT *context )
 523 {
 524     char *p;
 525     const char *path;
 526     DOS_FULL_NAME full_name;
 527     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA();
 528
 529     path = (const char *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 530     dta->unixPath = NULL;
 531     if (!DOSFS_GetFullName( path, FALSE, &full_name ))
 532     {
 533         AX_reg(context) = DOS_ExtendedError;
 534         SET_CFLAG(context);
 535         return 0;
 536     }
 537     dta->unixPath = HEAP_strdupA( GetProcessHeap(), 0, full_name.long_name );
 538     p = strrchr( dta->unixPath, '/' );
 539     *p = '\0';
 540
 541     /* Note: terminating NULL in dta->mask overwrites dta->search_attr
 542      *       (doesn't matter as it is set below anyway)
 543      */
 544     if (!DOSFS_ToDosFCBFormat( p + 1, dta->mask ))
 545     {
 546         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 547         dta->unixPath = NULL;
 548         DOS_ERROR( ER_FileNotFound, EC_NotFound, SA_Abort, EL_Disk );
 549         AX_reg(context) = ER_FileNotFound;
 550         SET_CFLAG(context);
 551         return 0;
 552     }
 553     dta->drive = (path[0] && (path[1] == ':')) ? toupper(path[0]) - 'A'
 554                                                : DRIVE_GetCurrentDrive();
 555     dta->count = 0;
 556     dta->search_attr = CL_reg(context);
 557     return 1;
 558 }
 559
 560
 561 static int INT21_FindNext( CONTEXT *context )
 562 {
 563     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA();
 564     WIN32_FIND_DATA32A entry;
 565     int count;
 566
 567     if (!dta->unixPath) return 0;
 568     if (!(count = DOSFS_FindNext( dta->unixPath, dta->mask, NULL, dta->drive,
 569                                   dta->search_attr, dta->count, &entry )))
 570     {
 571         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 572         dta->unixPath = NULL;
 573         return 0;
 574     }
 575     if ((int)dta->count + count > 0xffff)
 576     {
 577         fprintf( stderr, "Too many directory entries in %s\n", dta->unixPath );
 578         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 579         dta->unixPath = NULL;
 580         return 0;
 581     }
 582     dta->count += count;
 583     dta->fileattr = entry.dwFileAttributes;
 584     dta->filesize = entry.nFileSizeLow;
 585     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 586                            &dta->filedate, &dta->filetime );
 587     strcpy( dta->filename, entry.cAlternateFileName );
 588     return 1;
 589 }
 590
 591
 592 static BOOL32 INT21_CreateTempFile( CONTEXT *context )
 593 {
 594     static int counter = 0;
 595     char *name = PTR_SEG_OFF_TO_LIN( DS_reg(context), DX_reg(context) );
 596     char *p = name + strlen(name);
 597
 598     /* despite what Ralf Brown says, some programs seem to call without
 599      * ending backslash (DOS accepts that, so we accept it too) */
 600     if ((p == name) || (p[-1] != '\\')) *p++ = '\\';
 601
 602     for (;;)
 603     {
 604         sprintf( p, "wine%04x.%03d", (int)getpid(), counter );
 605         counter = (counter + 1) % 1000;
 606
 607         if ((AX_reg(context) = _lcreat_uniq( name, 0 )) != (WORD)HFILE_ERROR16)
 608         {
 609             dprintf_int( stddeb, "INT21_CreateTempFile: created %s\n", name );
 610             return TRUE;
 611         }
 612         if (DOS_ExtendedError != ER_FileExists) return FALSE;
 613     }
 614 }
 615
 616
 617 static BOOL32 INT21_GetCurrentDirectory( CONTEXT *context )
 618 {
 619     int drive = DOS_GET_DRIVE( DL_reg(context) );
 620     char *ptr = (char *)PTR_SEG_OFF_TO_LIN( DS_reg(context), SI_reg(context) );
 621
 622     if (!DRIVE_IsValid(drive))
 623     {
 624         DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
 625         return FALSE;
 626     }
 627     lstrcpyn32A( ptr, DRIVE_GetDosCwd(drive), 64 );
 628     AX_reg(context) = 0x0100;                        /* success return code */
 629     return TRUE;
 630 }
 631
 632
 633 static int INT21_GetDiskSerialNumber( CONTEXT *context )
 634 {
 635     BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 636     int drive = DOS_GET_DRIVE( BL_reg(context) );
 637
 638     if (!DRIVE_IsValid(drive))
 639     {
 640         DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
 641         return 0;
 642     }
 643
 644     *(WORD *)dataptr = 0;
 645     *(DWORD *)(dataptr + 2) = DRIVE_GetSerialNumber( drive );
 646     memcpy( dataptr + 6, DRIVE_GetLabel( drive ), 11 );
 647     strncpy(dataptr + 0x11, "FAT16   ", 8);
 648     return 1;
 649 }
 650
 651
 652 static int INT21_SetDiskSerialNumber( CONTEXT *context )
 653 {
 654     BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 655     int drive = DOS_GET_DRIVE( BL_reg(context) );
 656
 657     if (!DRIVE_IsValid(drive))
 658     {
 659         DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
 660         return 0;
 661     }
 662
 663     DRIVE_SetSerialNumber( drive, *(DWORD *)(dataptr + 2) );
 664     return 1;
 665 }
 666
 667
 668 /* microsoft's programmers should be shot for using CP/M style int21
 669    calls in Windows for Workgroup's winfile.exe */
 670
 671 static int INT21_FindFirstFCB( CONTEXT *context )
 672 {
 673     BYTE *fcb = (BYTE *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 674     FINDFILE_FCB *pFCB;
 675     LPCSTR root, cwd;
 676     int drive;
 677
 678     if (*fcb == 0xff) pFCB = (FINDFILE_FCB *)(fcb + 7);
 679     else pFCB = (FINDFILE_FCB *)fcb;
 680     drive = DOS_GET_DRIVE( pFCB->drive );
 681     root = DRIVE_GetRoot( drive );
 682     cwd  = DRIVE_GetUnixCwd( drive );
 683     pFCB->unixPath = HeapAlloc( GetProcessHeap(), 0,
 684                                 strlen(root)+strlen(cwd)+2 );
 685     if (!pFCB->unixPath) return 0;
 686     strcpy( pFCB->unixPath, root );
 687     strcat( pFCB->unixPath, "/" );
 688     strcat( pFCB->unixPath, cwd );
 689     pFCB->count = 0;
 690     return 1;
 691 }
 692
 693
 694 static int INT21_FindNextFCB( CONTEXT *context )
 695 {
 696     BYTE *fcb = (BYTE *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 697     FINDFILE_FCB *pFCB;
 698     DOS_DIRENTRY_LAYOUT *pResult = (DOS_DIRENTRY_LAYOUT *)GetCurrentDTA();
 699     WIN32_FIND_DATA32A entry;
 700     BYTE attr;
 701     int count;
 702
 703     if (*fcb == 0xff) /* extended FCB ? */
 704     {
 705         attr = fcb[6];
 706         pFCB = (FINDFILE_FCB *)(fcb + 7);
 707     }
 708     else
 709     {
 710         attr = 0;
 711         pFCB = (FINDFILE_FCB *)fcb;
 712     }
 713
 714     if (!pFCB->unixPath) return 0;
 715     if (!(count = DOSFS_FindNext( pFCB->unixPath, pFCB->filename, NULL,
 716                                   DOS_GET_DRIVE( pFCB->drive ), attr,
 717                                   pFCB->count, &entry )))
 718     {
 719         HeapFree( GetProcessHeap(), 0, pFCB->unixPath );
 720         pFCB->unixPath = NULL;
 721         return 0;
 722     }
 723     pFCB->count += count;
 724
 725     if (*fcb == 0xff) { /* place extended FCB header before pResult if called with extended FCB */
 726         *(BYTE *)pResult = 0xff;
 727         (BYTE *)pResult +=6; /* leave reserved field behind */
 728         *(BYTE *)pResult = entry.dwFileAttributes;
 729         ((BYTE *)pResult)++;
 730     }
 731     *(BYTE *)pResult = DOS_GET_DRIVE( pFCB->drive ); /* DOS_DIRENTRY_LAYOUT after current drive number */
 732     ((BYTE *)pResult)++;
 733     pResult->fileattr = entry.dwFileAttributes;
 734     pResult->cluster  = 0;  /* what else? */
 735     pResult->filesize = entry.nFileSizeLow;
 736     memset( pResult->reserved, 0, sizeof(pResult->reserved) );
 737     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 738                            &pResult->filedate, &pResult->filetime );
 739
 740     /* Convert file name to FCB format */
 741
 742     memset( pResult->filename, ' ', sizeof(pResult->filename) );
 743     if (!strcmp( entry.cAlternateFileName, "." )) pResult->filename[0] = '.';
 744     else if (!strcmp( entry.cAlternateFileName, ".." ))
 745         pResult->filename[0] = pResult->filename[1] = '.';
 746     else
 747     {
 748         char *p = strrchr( entry.cAlternateFileName, '.' );
 749         if (p && p[1] && (p != entry.cAlternateFileName))
 750         {
 751             memcpy( pResult->filename, entry.cAlternateFileName,
 752                     MIN( (p - entry.cAlternateFileName), 8 ) );
 753             memcpy( pResult->filename + 8, p + 1, MIN( strlen(p), 3 ) );
 754         }
 755         else
 756             memcpy( pResult->filename, entry.cAlternateFileName,
 757                     MIN( strlen(entry.cAlternateFileName), 8 ) );
 758     }
 759     return 1;
 760 }
 761
 762
 763 static void DeleteFileFCB( CONTEXT *context )
 764 {
 765     fprintf( stderr, "DeleteFileFCB: not implemented yet\n" );
 766 }
 767
 768 static void RenameFileFCB( CONTEXT *context )
 769 {
 770     fprintf( stderr, "RenameFileFCB: not implemented yet\n" );
 771 }
 772
 773
 774
 775 static void fLock( CONTEXT * context )
 776 {
 777
 778     switch ( AX_reg(context) & 0xff )
 779     {
 780         case 0x00: /* LOCK */
 781           if (!LockFile(BX_reg(context),
 782                         MAKELONG(DX_reg(context),CX_reg(context)), 0,
 783                         MAKELONG(DI_reg(context),SI_reg(context)), 0)) {
 784             AX_reg(context) = DOS_ExtendedError;
 785             SET_CFLAG(context);
 786           }
 787           break;
 788
 789         case 0x01: /* UNLOCK */
 790           if (!UnlockFile(BX_reg(context),
 791                           MAKELONG(DX_reg(context),CX_reg(context)), 0,
 792                           MAKELONG(DI_reg(context),SI_reg(context)), 0)) {
 793             AX_reg(context) = DOS_ExtendedError;
 794             SET_CFLAG(context);
 795           }
 796           return;
 797         default:
 798           AX_reg(context) = 0x0001;
 799           SET_CFLAG(context);
 800           return;
 801      }
 802 }
 803
 804
 805 extern void LOCAL_PrintHeap (WORD ds);
 806
 807 /***********************************************************************
 808  *           DOS3Call  (KERNEL.102)
 809  */
 810 void WINAPI DOS3Call( CONTEXT *context )
 811 {
 812     BOOL32      bSetDOSExtendedError = FALSE;
 813
 814     dprintf_int( stddeb, "int21: AX=%04x BX=%04x CX=%04x DX=%04x "
 815                  "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
 816                  AX_reg(context), BX_reg(context), CX_reg(context),
 817                  DX_reg(context), SI_reg(context), DI_reg(context),
 818                  (WORD)DS_reg(context), (WORD)ES_reg(context),
 819                  EFL_reg(context) );
 820
 821     if (AH_reg(context) == 0x59)  /* Get extended error info */
 822     {
 823         AX_reg(context) = DOS_ExtendedError;
 824         BH_reg(context) = DOS_ErrorClass;
 825         BL_reg(context) = DOS_ErrorAction;
 826         CH_reg(context) = DOS_ErrorLocus;
 827         return;
 828     }
 829
 830     DOS_ERROR( 0, 0, 0, 0 );
 831     RESET_CFLAG(context);  /* Not sure if this is a good idea */
 832
 833     switch(AH_reg(context))
 834     {
 835     case 0x00: /* TERMINATE PROGRAM */
 836         TASK_KillCurrentTask( 0 );
 837         break;
 838
 839     case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
 840     case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
 841     case 0x03: /* READ CHARACTER FROM STDAUX  */
 842     case 0x04: /* WRITE CHARACTER TO STDAUX */
 843     case 0x05: /* WRITE CHARACTER TO PRINTER */
 844     case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
 845     case 0x07: /* DIRECT CHARACTER INPUT, WITHOUT ECHO */
 846     case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
 847     case 0x09: /* WRITE STRING TO STANDARD OUTPUT */
 848     case 0x0a: /* BUFFERED INPUT */
 849     case 0x0b: /* GET STDIN STATUS */
 850     case 0x0c: /* FLUSH BUFFER AND READ STANDARD INPUT */
 851     case 0x0f: /* OPEN FILE USING FCB */
 852     case 0x10: /* CLOSE FILE USING FCB */
 853     case 0x14: /* SEQUENTIAL READ FROM FCB FILE */
 854     case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */
 855     case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */
 856     case 0x21: /* READ RANDOM RECORD FROM FCB FILE */
 857     case 0x22: /* WRITE RANDOM RECORD TO FCB FILE */
 858     case 0x23: /* GET FILE SIZE FOR FCB */
 859     case 0x24: /* SET RANDOM RECORD NUMBER FOR FCB */
 860     case 0x26: /* CREATE NEW PROGRAM SEGMENT PREFIX */
 861     case 0x27: /* RANDOM BLOCK READ FROM FCB FILE */
 862     case 0x28: /* RANDOM BLOCK WRITE TO FCB FILE */
 863     case 0x29: /* PARSE FILENAME INTO FCB */
 864     case 0x37: /* "SWITCHAR" - GET SWITCH CHARACTER
 865                   "SWITCHAR" - SET SWITCH CHARACTER
 866                   "AVAILDEV" - SPECIFY \DEV\ PREFIX USE */
 867     case 0x54: /* GET VERIFY FLAG */
 868         INT_BARF( context, 0x21 );
 869         break;
 870     case 0x2e: /* SET VERIFY FLAG */
 871         /* we cannot change the behaviour anyway, so just ignore it */
 872         break;
 873
 874     case 0x18: /* NULL FUNCTIONS FOR CP/M COMPATIBILITY */
 875     case 0x1d:
 876     case 0x1e:
 877     case 0x20:
 878     case 0x6b: /* NULL FUNCTION */
 879         AL_reg(context) = 0;
 880         break;
 881
 882     case 0x5c: /* "FLOCK" - RECORD LOCKING */
 883         fLock(context);
 884         break;
 885
 886     case 0x0d: /* DISK BUFFER FLUSH */
 887         RESET_CFLAG(context); /* dos 6+ only */
 888         break;
 889
 890     case 0x0e: /* SELECT DEFAULT DRIVE */
 891         DRIVE_SetCurrentDrive( DL_reg(context) );
 892         AL_reg(context) = MAX_DOS_DRIVES;
 893         break;
 894
 895     case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
 896         if (!INT21_FindFirstFCB(context))
 897         {
 898             AL_reg(context) = 0xff;
 899             break;
 900         }
 901         /* else fall through */
 902
 903     case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
 904         AL_reg(context) = INT21_FindNextFCB(context) ? 0x00 : 0xff;
 905         break;
 906
 907     case 0x13: /* DELETE FILE USING FCB */
 908         DeleteFileFCB(context);
 909         break;
 910
 911     case 0x17: /* RENAME FILE USING FCB */
 912         RenameFileFCB(context);
 913         break;
 914
 915     case 0x19: /* GET CURRENT DEFAULT DRIVE */
 916         AL_reg(context) = DRIVE_GetCurrentDrive();
 917         break;
 918
 919     case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
 920         {
 921             TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 922             pTask->dta = PTR_SEG_OFF_TO_SEGPTR(DS_reg(context),DX_reg(context));
 923             dprintf_int(stddeb, "int21: Set DTA: %08lx\n", pTask->dta);
 924         }
 925         break;
 926
 927     case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
 928         DL_reg(context) = 0;
 929         if (!INT21_GetDriveAllocInfo(context)) AX_reg(context) = 0xffff;
 930         break;
 931
 932     case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
 933         if (!INT21_GetDriveAllocInfo(context)) AX_reg(context) = 0xffff;
 934         break;
 935
 936     case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
 937         GetDrivePB(context, DRIVE_GetCurrentDrive());
 938         break;
 939
 940     case 0x25: /* SET INTERRUPT VECTOR */
 941         INT_SetHandler( AL_reg(context),
 942                         (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( DS_reg(context),
 943                                                           DX_reg(context)));
 944         break;
 945
 946     case 0x2a: /* GET SYSTEM DATE */
 947         INT21_GetSystemDate(context);
 948         break;
 949
 950     case 0x2b: /* SET SYSTEM DATE */
 951         fprintf( stdnimp, "SetSystemDate(%02d/%02d/%04d): not allowed\n",
 952                  DL_reg(context), DH_reg(context), CX_reg(context) );
 953         AL_reg(context) = 0;  /* Let's pretend we succeeded */
 954         break;
 955
 956     case 0x2c: /* GET SYSTEM TIME */
 957         INT21_GetSystemTime(context);
 958         break;
 959
 960     case 0x2d: /* SET SYSTEM TIME */
 961         fprintf( stdnimp, "SetSystemTime(%02d:%02d:%02d.%02d): not allowed\n",
 962                  CH_reg(context), CL_reg(context),
 963                  DH_reg(context), DL_reg(context) );
 964         AL_reg(context) = 0;  /* Let's pretend we succeeded */
 965         break;
 966
 967     case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */
 968         {
 969             TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 970             ES_reg(context) = SELECTOROF( pTask->dta );
 971             BX_reg(context) = OFFSETOF( pTask->dta );
 972         }
 973         break;
 974
 975     case 0x30: /* GET DOS VERSION */
 976         AX_reg(context) = (HIWORD(GetVersion16()) >> 8) |
 977                           (HIWORD(GetVersion16()) << 8);
 978         BX_reg(context) = 0x0012;     /* 0x123456 is Wine's serial # */
 979         CX_reg(context) = 0x3456;
 980         break;
 981
 982     case 0x31: /* TERMINATE AND STAY RESIDENT */
 983         INT_BARF( context, 0x21 );
 984         break;
 985
 986     case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
 987         GetDrivePB(context, DOS_GET_DRIVE( DL_reg(context) ) );
 988         break;
 989
 990     case 0x33: /* MULTIPLEXED */
 991         switch (AL_reg(context))
 992         {
 993               case 0x00: /* GET CURRENT EXTENDED BREAK STATE */
 994                 DL_reg(context) = 0;
 995                 break;
 996
 997               case 0x01: /* SET EXTENDED BREAK STATE */
 998                 break;
 999
1000               case 0x02: /* GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE*/
1001                 DL_reg(context) = 0;
1002                 break;
1003
1004               case 0x05: /* GET BOOT DRIVE */
1005                 DL_reg(context) = 3;
1006                 /* c: is Wine's bootdrive (a: is 1)*/
1007                 break;
1008
1009               case 0x06: /* GET TRUE VERSION NUMBER */
1010                 BX_reg(context) = (HIWORD(GetVersion16() >> 8)) |
1011                                   (HIWORD(GetVersion16() << 8));
1012                 DX_reg(context) = 0x00;
1013                 break;
1014
1015               default:
1016                 INT_BARF( context, 0x21 );
1017                 break;
1018         }
1019         break;
1020
1021     case 0x34: /* GET ADDRESS OF INDOS FLAG */
1022         if (!heap) INT21_CreateHeap();
1023         ES_reg(context) = DosHeapHandle;
1024         BX_reg(context) = (int)&heap->InDosFlag - (int)heap;
1025         break;
1026
1027     case 0x35: /* GET INTERRUPT VECTOR */
1028         {
1029             FARPROC16 addr = INT_GetHandler( AL_reg(context) );
1030             ES_reg(context) = SELECTOROF(addr);
1031             BX_reg(context) = OFFSETOF(addr);
1032         }
1033         break;
1034
1035     case 0x36: /* GET FREE DISK SPACE */
1036         if (!INT21_GetFreeDiskSpace(context)) AX_reg(context) = 0xffff;
1037         break;
1038
1039     case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
1040         AX_reg(context) = 0x02; /* no country support available */
1041         SET_CFLAG(context);
1042         break;
1043
1044     case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */
1045         bSetDOSExtendedError = (!CreateDirectory16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1046                                                            DX_reg(context) ), NULL));
1047         break;
1048
1049     case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */
1050         bSetDOSExtendedError = (!RemoveDirectory16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1051                                                                  DX_reg(context) )));
1052         break;
1053
1054     case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
1055         bSetDOSExtendedError = !INT21_ChangeDir(context);
1056         break;
1057
1058     case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
1059         AX_reg(context) = _lcreat16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1060                                     DX_reg(context) ), CX_reg(context) );
1061         bSetDOSExtendedError = (AX_reg(context) == (WORD)HFILE_ERROR16);
1062         break;
1063
1064     case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
1065         OpenExistingFile(context);
1066         break;
1067
1068     case 0x3e: /* "CLOSE" - CLOSE FILE */
1069         bSetDOSExtendedError = ((AX_reg(context) = _lclose16( BX_reg(context) )) != 0);
1070         break;
1071
1072     case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */
1073         {
1074             LONG result = WIN16_hread( BX_reg(context),
1075                                        PTR_SEG_OFF_TO_SEGPTR( DS_reg(context),
1076                                                               DX_reg(context) ),
1077                                        CX_reg(context) );
1078             if (result == -1) bSetDOSExtendedError = TRUE;
1079             else AX_reg(context) = (WORD)result;
1080         }
1081         break;
1082
1083     case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */
1084         {
1085             LONG result = _hwrite16( BX_reg(context),
1086                                      PTR_SEG_OFF_TO_LIN( DS_reg(context),
1087                                                          DX_reg(context) ),
1088                                      CX_reg(context) );
1089             if (result == -1) bSetDOSExtendedError = TRUE;
1090             else AX_reg(context) = (WORD)result;
1091         }
1092         break;
1093
1094     case 0x41: /* "UNLINK" - DELETE FILE */
1095         bSetDOSExtendedError = (!DeleteFile32A( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1096                                                              DX_reg(context) )));
1097         break;
1098
1099     case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
1100         {
1101             LONG status = _llseek16( BX_reg(context),
1102                                      MAKELONG(DX_reg(context),CX_reg(context)),
1103                                      AL_reg(context) );
1104             if (status == -1) bSetDOSExtendedError = TRUE;
1105             else
1106             {
1107                 AX_reg(context) = LOWORD(status);
1108                 DX_reg(context) = HIWORD(status);
1109             }
1110         }
1111         break;
1112
1113     case 0x43: /* FILE ATTRIBUTES */
1114         switch (AL_reg(context))
1115         {
1116         case 0x00:
1117             AX_reg(context) = (WORD)GetFileAttributes32A(
1118                                           PTR_SEG_OFF_TO_LIN(DS_reg(context),
1119                                                              DX_reg(context)));
1120             if (AX_reg(context) == 0xffff) bSetDOSExtendedError = TRUE;
1121             else CX_reg(context) = AX_reg(context);
1122             break;
1123
1124         case 0x01:
1125             bSetDOSExtendedError =
1126                 (!SetFileAttributes32A( PTR_SEG_OFF_TO_LIN(DS_reg(context),
1127                                                            DX_reg(context)),
1128                                                            CX_reg(context) ));
1129             break;
1130         }
1131         break;
1132
1133     case 0x44: /* IOCTL */
1134         switch (AL_reg(context))
1135         {
1136         case 0x00:
1137             ioctlGetDeviceInfo(context);
1138             break;
1139
1140         case 0x01:
1141             break;
1142         case 0x05:{     /* IOCTL - WRITE TO BLOCK DEVICE CONTROL CHANNEL */
1143             BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context));
1144             int i;
1145             int drive = DOS_GET_DRIVE(BL_reg(context));
1146
1147             fprintf(stdnimp,"int21: program tried to write to block device control channel of drive %d:\n",drive);
1148             for (i=0;i<CX_reg(context);i++)
1149                 fprintf(stdnimp,"%02x ",dataptr[i]);
1150             fprintf(stdnimp,"\n");
1151             AX_reg(context)=CX_reg(context);
1152             break;
1153         }
1154         case 0x08:   /* Check if drive is removable. */
1155             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1156             {
1157             case DRIVE_CANNOTDETERMINE:
1158                 DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
1159                 AX_reg(context) = ER_InvalidDrive;
1160                 SET_CFLAG(context);
1161                 break;
1162             case DRIVE_REMOVABLE:
1163                 AX_reg(context) = 0;      /* removable */
1164                 break;
1165             default:
1166                 AX_reg(context) = 1;   /* not removable */
1167                 break;
1168             }
1169             break;
1170
1171         case 0x09:   /* CHECK IF BLOCK DEVICE REMOTE */
1172             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1173             {
1174             case DRIVE_CANNOTDETERMINE:
1175                 DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
1176                 AX_reg(context) = ER_InvalidDrive;
1177                 SET_CFLAG(context);
1178                 break;
1179             case DRIVE_REMOTE:
1180                 DX_reg(context) = (1<<9) | (1<<12);  /* remote */
1181                 break;
1182             default:
1183                 DX_reg(context) = 0;  /* FIXME: use driver attr here */
1184                 break;
1185             }
1186             break;
1187
1188         case 0x0a: /* check if handle (BX) is remote */
1189             /* returns DX, bit 15 set if remote, bit 14 set if date/time
1190              * not set on close
1191              */
1192             DX_reg(context) = 0;
1193             break;
1194
1195         case 0x0b:   /* SET SHARING RETRY COUNT */
1196             if (!CX_reg(context))
1197             {
1198                 AX_reg(context) = 1;
1199                 SET_CFLAG(context);
1200                 break;
1201             }
1202             sharing_pause = CX_reg(context);
1203             if (!DX_reg(context))
1204                 sharing_retries = DX_reg(context);
1205             RESET_CFLAG(context);
1206             break;
1207
1208         case 0x0d:
1209             bSetDOSExtendedError = ioctlGenericBlkDevReq(context);
1210             break;
1211
1212         case 0x0e: /* get logical drive mapping */
1213             AL_reg(context) = 0; /* drive has no mapping - FIXME: may be wrong*/
1214             break;
1215
1216         case 0x0F:   /* Set logical drive mapping */
1217             {
1218             int drive;
1219             drive = DOS_GET_DRIVE ( BL_reg(context) );
1220             if ( ! DRIVE_SetLogicalMapping ( drive, drive+1 ) )
1221             {
1222                 SET_CFLAG(context);
1223                 AX_reg(context) = 0x000F;  /* invalid drive */
1224             }
1225             break;
1226             }
1227
1228         default:
1229             INT_BARF( context, 0x21 );
1230             break;
1231         }
1232         break;
1233
1234     case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */
1235         bSetDOSExtendedError = ((AX_reg(context) = FILE_Dup(BX_reg(context))) == (WORD)HFILE_ERROR16);
1236         break;
1237
1238     case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
1239         bSetDOSExtendedError = (FILE_Dup2( BX_reg(context), CX_reg(context) ) == HFILE_ERROR32);
1240         break;
1241
1242     case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
1243         bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
1244         break;
1245
1246     case 0x48: /* ALLOCATE MEMORY */
1247     case 0x49: /* FREE MEMORY */
1248     case 0x4a: /* RESIZE MEMORY BLOCK */
1249         INT_BARF( context, 0x21 );
1250         break;
1251
1252     case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
1253         AX_reg(context) = WinExec16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1254                                                          DX_reg(context) ),
1255                                      SW_NORMAL );
1256         if (AX_reg(context) < 32) SET_CFLAG(context);
1257         break;
1258
1259     case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
1260         TASK_KillCurrentTask( AL_reg(context) );
1261         break;
1262
1263     case 0x4d: /* GET RETURN CODE */
1264         AX_reg(context) = 0; /* normal exit */
1265         break;
1266
1267     case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
1268         if (!INT21_FindFirst(context)) break;
1269         /* fall through */
1270
1271     case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
1272         if (!INT21_FindNext(context))
1273         {
1274             DOS_ERROR( ER_NoMoreFiles, EC_MediaError, SA_Abort, EL_Disk );
1275             AX_reg(context) = ER_NoMoreFiles;
1276             SET_CFLAG(context);
1277         }
1278         else AX_reg(context) = 0;  /* OK */
1279         break;
1280
1281     case 0x51: /* GET PSP ADDRESS */
1282     case 0x62: /* GET PSP ADDRESS */
1283         /* FIXME: should we return the original DOS PSP upon */
1284         /*        Windows startup ? */
1285         BX_reg(context) = GetCurrentPDB();
1286         break;
1287
1288     case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
1289         ES_reg(context) = 0x0;
1290         BX_reg(context) = 0x0;
1291         INT_BARF( context, 0x21 );
1292         break;
1293
1294     case 0x56: /* "RENAME" - RENAME FILE */
1295         bSetDOSExtendedError =
1296                 (!MoveFile32A( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
1297                                PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context))));
1298         break;
1299
1300     case 0x57: /* FILE DATE AND TIME */
1301         switch (AL_reg(context))
1302         {
1303         case 0x00:  /* Get */
1304             {
1305                 FILETIME filetime;
1306                 if (!GetFileTime( BX_reg(context), NULL, NULL, &filetime ))
1307                      bSetDOSExtendedError = TRUE;
1308                 else FileTimeToDosDateTime( &filetime, &DX_reg(context),
1309                                             &CX_reg(context) );
1310             }
1311             break;
1312
1313         case 0x01:  /* Set */
1314             {
1315                 FILETIME filetime;
1316                 DosDateTimeToFileTime( DX_reg(context), CX_reg(context),
1317                                        &filetime );
1318                 bSetDOSExtendedError =
1319                         (!SetFileTime( BX_reg(context), NULL, NULL, &filetime ));
1320             }
1321             break;
1322         }
1323         break;
1324
1325     case 0x58: /* GET OR SET MEMORY/UMB ALLOCATION STRATEGY */
1326         switch (AL_reg(context))
1327         {
1328         case 0x00:
1329             AX_reg(context) = 1;
1330             break;
1331         case 0x02:
1332             AX_reg(context) = 0;
1333             break;
1334         case 0x01:
1335         case 0x03:
1336             break;
1337         }
1338         RESET_CFLAG(context);
1339         break;
1340
1341     case 0x5a: /* CREATE TEMPORARY FILE */
1342         bSetDOSExtendedError = !INT21_CreateTempFile(context);
1343         break;
1344
1345     case 0x5b: /* CREATE NEW FILE */
1346         bSetDOSExtendedError = ((AX_reg(context) =
1347                 _lcreat_uniq( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)), 0 ))
1348                                                                 == (WORD)HFILE_ERROR16);
1349         break;
1350
1351     case 0x5d: /* NETWORK */
1352     case 0x5e:
1353         /* network software not installed */
1354         DOS_ERROR( ER_NoNetwork, EC_NotFound, SA_Abort, EL_Network );
1355         bSetDOSExtendedError = TRUE;
1356         break;
1357
1358     case 0x5f: /* NETWORK */
1359         switch (AL_reg(context))
1360         {
1361         case 0x07: /* ENABLE DRIVE */
1362             if (!DRIVE_Enable( DL_reg(context) ))
1363             {
1364                 DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
1365                 bSetDOSExtendedError = TRUE;
1366             }
1367             break;
1368
1369         case 0x08: /* DISABLE DRIVE */
1370             if (!DRIVE_Disable( DL_reg(context) ))
1371             {
1372                 DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
1373                 bSetDOSExtendedError = TRUE;
1374             }
1375             break;
1376
1377         default:
1378             /* network software not installed */
1379             DOS_ERROR( ER_NoNetwork, EC_NotFound, SA_Abort, EL_Network );
1380             bSetDOSExtendedError = TRUE;
1381             break;
1382         }
1383         break;
1384
1385     case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
1386         {
1387             if (!GetFullPathName32A( PTR_SEG_OFF_TO_LIN(DS_reg(context),
1388                                                         SI_reg(context)), 128,
1389                                      PTR_SEG_OFF_TO_LIN(ES_reg(context),
1390                                                         DI_reg(context)),NULL))
1391                 bSetDOSExtendedError = TRUE;
1392             else AX_reg(context) = 0;
1393         }
1394         break;
1395
1396     case 0x61: /* UNUSED */
1397     case 0x63: /* UNUSED */
1398     case 0x64: /* OS/2 DOS BOX */
1399         INT_BARF( context, 0x21 );
1400         SET_CFLAG(context);
1401         break;
1402
1403     case 0x65:{/* GET EXTENDED COUNTRY INFORMATION */
1404         extern WORD WINE_LanguageId;
1405         BYTE    *dataptr=PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context));;
1406         switch (AL_reg(context)) {
1407         case 0x01:
1408             dataptr[0] = 0x1;
1409             *(WORD*)(dataptr+1) = 41;
1410             *(WORD*)(dataptr+3) = WINE_LanguageId;
1411             *(WORD*)(dataptr+5) = CodePage;
1412             break;
1413         case 0x06:
1414             dataptr[0] = 0x06;
1415             *(DWORD*)(dataptr+1) = MAKELONG(DOSMEM_CollateTable & 0xFFFF,DOSMEM_AllocSelector(DOSMEM_CollateTable>>16));
1416             CX_reg(context)         = 258;/*FIXME: size of table?*/
1417             break;
1418         default:
1419             INT_BARF( context, 0x21 );
1420             SET_CFLAG(context);
1421             break;
1422         }
1423         break;
1424     }
1425     case 0x66: /* GLOBAL CODE PAGE TABLE */
1426         switch (AL_reg(context))
1427         {
1428         case 0x01:
1429             DX_reg(context) = BX_reg(context) = CodePage;
1430             RESET_CFLAG(context);
1431             break;
1432         case 0x02:
1433             CodePage = BX_reg(context);
1434             RESET_CFLAG(context);
1435             break;
1436         }
1437         break;
1438
1439     case 0x67: /* SET HANDLE COUNT */
1440         SetHandleCount16( BX_reg(context) );
1441         if (DOS_ExtendedError) bSetDOSExtendedError = TRUE;
1442         break;
1443
1444     case 0x68: /* "FFLUSH" - COMMIT FILE */
1445     case 0x6a: /* COMMIT FILE */
1446         bSetDOSExtendedError = (!FlushFileBuffers( BX_reg(context) ));
1447         break;
1448
1449     case 0x69: /* DISK SERIAL NUMBER */
1450         switch (AL_reg(context))
1451         {
1452         case 0x00:
1453             if (!INT21_GetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
1454             else AX_reg(context) = 0;
1455             break;
1456
1457         case 0x01:
1458             if (!INT21_SetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
1459             else AX_reg(context) = 1;
1460             break;
1461         }
1462         break;
1463
1464     case 0x6C: /* Extended Open/Create*/
1465         bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
1466         break;
1467
1468     case 0x71: /* MS-DOS 7 (Windows95) - LONG FILENAME FUNCTIONS */
1469         switch(AL_reg(context))
1470         {
1471         case 0x39:  /* Create directory */
1472             bSetDOSExtendedError = (!CreateDirectory32A(
1473                                         PTR_SEG_OFF_TO_LIN( DS_reg(context),
1474                                                   DX_reg(context) ), NULL));
1475             break;
1476         case 0x3a:  /* Remove directory */
1477             bSetDOSExtendedError = (!RemoveDirectory32A(
1478                                         PTR_SEG_OFF_TO_LIN( DS_reg(context),
1479                                                         DX_reg(context) )));
1480             break;
1481         case 0x43:  /* Get/Set file attributes */
1482         switch (BL_reg(context))
1483         {
1484         case 0x00: /* Get file attributes */
1485             CX_reg(context) = (WORD)GetFileAttributes32A(
1486                                           PTR_SEG_OFF_TO_LIN(DS_reg(context),
1487                                                              DX_reg(context)));
1488             if (CX_reg(context) == 0xffff) bSetDOSExtendedError = TRUE;
1489             break;
1490         case 0x01:
1491             bSetDOSExtendedError = (!SetFileAttributes32A(
1492                                         PTR_SEG_OFF_TO_LIN(DS_reg(context),
1493                                                            DX_reg(context)),
1494                                         CX_reg(context)  ) );
1495             break;
1496         default:
1497           fprintf( stderr,
1498                    "Unimplemented int21 long file name function:\n");
1499           INT_BARF( context, 0x21 );
1500           SET_CFLAG(context);
1501           AL_reg(context) = 0;
1502           break;
1503         }
1504         break;
1505         case 0x47:  /* Get current directory */
1506             bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
1507             break;
1508
1509         case 0x4e:  /* Find first file */
1510             /* FIXME: use attributes in CX */
1511             if ((AX_reg(context) = FindFirstFile16(
1512                    PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
1513                    (WIN32_FIND_DATA32A *)PTR_SEG_OFF_TO_LIN(ES_reg(context),
1514                                                             DI_reg(context))))
1515                 == INVALID_HANDLE_VALUE16)
1516                 bSetDOSExtendedError = TRUE;
1517             break;
1518         case 0x4f:  /* Find next file */
1519             if (!FindNextFile16( BX_reg(context),
1520                     (WIN32_FIND_DATA32A *)PTR_SEG_OFF_TO_LIN(ES_reg(context),
1521                                                              DI_reg(context))))
1522                 bSetDOSExtendedError = TRUE;
1523             break;
1524         case 0xa1:  /* Find close */
1525             bSetDOSExtendedError = (!FindClose16( BX_reg(context) ));
1526             break;
1527         case 0xa0:
1528             break;
1529         case 0x60:
1530           switch(CL_reg(context))
1531           {
1532             case 0x02:  /*Get canonical long filename or path */
1533               if (!GetFullPathName32A
1534                   ( PTR_SEG_OFF_TO_LIN(DS_reg(context),
1535                                        SI_reg(context)), 128,
1536                     PTR_SEG_OFF_TO_LIN(ES_reg(context),
1537                                        DI_reg(context)),NULL))
1538                 bSetDOSExtendedError = TRUE;
1539               else AX_reg(context) = 0;
1540               break;
1541             default:
1542               fprintf( stderr,
1543                        "Unimplemented int21 long file name function:\n");
1544               INT_BARF( context, 0x21 );
1545               SET_CFLAG(context);
1546               AL_reg(context) = 0;
1547               break;
1548           }
1549             break;
1550         case 0x6c:  /* Create or open file */
1551           /* translate Dos 7 action to Dos 6 action */
1552             bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
1553             break;
1554
1555         case 0x3b:  /* Change directory */
1556             if (!SetCurrentDirectory32A(PTR_SEG_OFF_TO_LIN(
1557                                                 DS_reg(context),
1558                                                 DX_reg(context)
1559                                         ))
1560             ) {
1561                 SET_CFLAG(context);
1562                 AL_reg(context) = DOS_ExtendedError;
1563             }
1564             break;
1565         case 0x41:  /* Delete file */
1566             if (!DeleteFile32A(PTR_SEG_OFF_TO_LIN(
1567                                         DS_reg(context),
1568                                         DX_reg(context))
1569             )) {
1570                 SET_CFLAG(context);
1571                 AL_reg(context) = DOS_ExtendedError;
1572             }
1573             break;
1574         case 0x56:  /* Move (rename) file */
1575         default:
1576             fprintf( stderr, "Unimplemented int21 long file name function:\n");
1577             INT_BARF( context, 0x21 );
1578             SET_CFLAG(context);
1579             AL_reg(context) = 0;
1580             break;
1581         }
1582         break;
1583
1584     case 0x70: /* MS-DOS 7 (Windows95) - ??? (country-specific?)*/
1585     case 0x72: /* MS-DOS 7 (Windows95) - ??? */
1586     case 0x73: /* MS-DOS 7 (Windows95) - DRIVE LOCKING ??? */
1587         dprintf_int(stddeb,"int21: windows95 function AX %04x\n",
1588                     AX_reg(context));
1589         dprintf_int(stddeb, "        returning unimplemented\n");
1590         SET_CFLAG(context);
1591         AL_reg(context) = 0;
1592         break;
1593
1594     case 0xdc: /* CONNECTION SERVICES - GET CONNECTION NUMBER */
1595     case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */
1596         break;
1597
1598     default:
1599         INT_BARF( context, 0x21 );
1600         break;
1601
1602     } /* END OF SWITCH */
1603
1604     if( bSetDOSExtendedError )          /* set general error condition */
1605     {
1606         AX_reg(context) = DOS_ExtendedError;
1607         SET_CFLAG(context);
1608     }
1609
1610     dprintf_int( stddeb, "ret21: AX=%04x BX=%04x CX=%04x DX=%04x "
1611                  "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
1612                  AX_reg(context), BX_reg(context), CX_reg(context),
1613                  DX_reg(context), SI_reg(context), DI_reg(context),
1614                  (WORD)DS_reg(context), (WORD)ES_reg(context),
1615                  EFL_reg(context));
1616 }
1617
1618 FARPROC16 WINAPI GetSetKernelDOSProc(FARPROC16 DosProc)
1619 {
1620         fprintf(stderr, "GetSetKernelDOSProc(DosProc: %08x);\n", (UINT32)DosProc);
1621         return NULL;
1622 }