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 "xmalloc.h"
  28 #include "stddebug.h"
  29 #include "debug.h"
  30 #if defined(__svr4__) || defined(_SCO_DS)
  31 /* SVR4 DOESNT do locking the same way must implement properly */
  32 #define LOCK_EX 0
  33 #define LOCK_SH  1
  34 #define LOCK_NB  8
  35 #endif
  36
  37
  38 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
  39
  40 /* Define the drive parameter block, as used by int21/1F
  41  * and int21/32.  This table can be accessed through the
  42  * global 'dpb' pointer, which points into the local dos
  43  * heap.
  44  */
  45 struct DPB
  46 {
  47     BYTE drive_num;         /* 0=A, etc. */
  48     BYTE unit_num;          /* Drive's unit number (?) */
  49     WORD sector_size;       /* Sector size in bytes */
  50     BYTE high_sector;       /* Highest sector in a cluster */
  51     BYTE shift;             /* Shift count (?) */
  52     WORD reserved;          /* Number of reserved sectors at start */
  53     BYTE num_FAT;           /* Number of FATs */
  54     WORD dir_entries;       /* Number of root dir entries */
  55     WORD first_data;        /* First data sector */
  56     WORD high_cluster;      /* Highest cluster number */
  57     WORD sectors_in_FAT;    /* Number of sectors per FAT */
  58     WORD start_dir;         /* Starting sector of first dir */
  59     DWORD driver_head;      /* Address of device driver header (?) */
  60     BYTE media_ID;          /* Media ID */
  61     BYTE access_flag;       /* Prev. accessed flag (0=yes,0xFF=no) */
  62     DWORD next;             /* Pointer to next DPB in list */
  63     WORD free_search;       /* Free cluster search start */
  64     WORD free_clusters;     /* Number of free clusters (0xFFFF=unknown) */
  65 };
  66
  67 WORD CodePage = 437;
  68 DWORD dpbsegptr;
  69
  70 struct DosHeap {
  71         BYTE InDosFlag;
  72         BYTE mediaID;
  73         BYTE biosdate[8];
  74         struct DPB dpb;
  75 };
  76 static struct DosHeap *heap;
  77 static WORD DosHeapHandle;
  78
  79 WORD sharing_retries = 3;      /* number of retries at sharing violation */
  80 WORD sharing_pause = 1;        /* pause between retries */
  81
  82 extern char TempDirectory[];
  83
  84 static BOOL32 INT21_CreateHeap(void)
  85 {
  86     if (!(DosHeapHandle = GlobalAlloc16(GMEM_FIXED,sizeof(struct DosHeap))))
  87     {
  88         fprintf( stderr, "INT21_Init: Out of memory\n");
  89         return FALSE;
  90     }
  91     heap = (struct DosHeap *) GlobalLock16(DosHeapHandle);
  92     dpbsegptr = PTR_SEG_OFF_TO_SEGPTR(DosHeapHandle,(int)&heap->dpb-(int)heap);
  93     heap->InDosFlag = 0;
  94     strcpy(heap->biosdate, "01/01/80");
  95     return TRUE;
  96 }
  97
  98 BYTE *GetCurrentDTA(void)
  99 {
 100     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 101     return (BYTE *)PTR_SEG_TO_LIN( pTask->dta );
 102 }
 103
 104
 105 void ChopOffWhiteSpace(char *string)
 106 {
 107         int length;
 108
 109         for (length = strlen(string) ; length ; length--)
 110                 if (string[length] == ' ')
 111                         string[length] = '\0';
 112 }
 113
 114 void CreateBPB(int drive, BYTE *data)
 115 {
 116         if (drive > 1) {
 117                 setword(data, 512);
 118                 data[2] = 2;
 119                 setword(&data[3], 0);
 120                 data[5] = 2;
 121                 setword(&data[6], 240);
 122                 setword(&data[8], 64000);
 123                 data[0x0a] = 0xf8;
 124                 setword(&data[0x0b], 40);
 125                 setword(&data[0x0d], 56);
 126                 setword(&data[0x0f], 2);
 127                 setword(&data[0x11], 0);
 128                 setword(&data[0x1f], 800);
 129                 data[0x21] = 5;
 130                 setword(&data[0x22], 1);
 131         } else { /* 1.44mb */
 132                 setword(data, 512);
 133                 data[2] = 2;
 134                 setword(&data[3], 0);
 135                 data[5] = 2;
 136                 setword(&data[6], 240);
 137                 setword(&data[8], 2880);
 138                 data[0x0a] = 0xf8;
 139                 setword(&data[0x0b], 6);
 140                 setword(&data[0x0d], 18);
 141                 setword(&data[0x0f], 2);
 142                 setword(&data[0x11], 0);
 143                 setword(&data[0x1f], 80);
 144                 data[0x21] = 7;
 145                 setword(&data[0x22], 2);
 146         }
 147 }
 148
 149 static int INT21_GetFreeDiskSpace( CONTEXT *context )
 150 {
 151     DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
 152     char root[] = "A:\\";
 153
 154     *root += DOS_GET_DRIVE( DL_reg(context) );
 155     if (!GetDiskFreeSpace32A( root, &cluster_sectors, &sector_bytes,
 156                               &free_clusters, &total_clusters )) return 0;
 157     AX_reg(context) = cluster_sectors;
 158     BX_reg(context) = free_clusters;
 159     CX_reg(context) = sector_bytes;
 160     DX_reg(context) = total_clusters;
 161     return 1;
 162 }
 163
 164 static int INT21_GetDriveAllocInfo( CONTEXT *context )
 165 {
 166     if (!INT21_GetFreeDiskSpace( context )) return 0;
 167     if (!heap && !INT21_CreateHeap()) return 0;
 168     heap->mediaID = 0xf0;
 169     DS_reg(context) = DosHeapHandle;
 170     BX_reg(context) = (int)&heap->mediaID - (int)heap;
 171     return 1;
 172 }
 173
 174 static void GetDrivePB( CONTEXT *context, int drive )
 175 {
 176         if(!DRIVE_IsValid(drive))
 177         {
 178             DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
 179             AX_reg(context) = 0x00ff;
 180         }
 181         else if (heap || INT21_CreateHeap())
 182         {
 183                 dprintf_int(stddeb, "int21: GetDrivePB not fully implemented.\n");
 184
 185                 /* FIXME: I have no idea what a lot of this information should
 186                  * say or whether it even really matters since we're not allowing
 187                  * direct block access.  However, some programs seem to depend on
 188                  * getting at least _something_ back from here.  The 'next' pointer
 189                  * does worry me, though.  Should we have a complete table of
 190                  * separate DPBs per drive?  Probably, but I'm lazy. :-)  -CH
 191                  */
 192                 heap->dpb.drive_num = heap->dpb.unit_num = drive; /*The same?*/
 193                 heap->dpb.sector_size = 512;
 194                 heap->dpb.high_sector = 1;
 195                 heap->dpb.shift = drive < 2 ? 0 : 6; /*6 for HD, 0 for floppy*/
 196                 heap->dpb.reserved = 0;
 197                 heap->dpb.num_FAT = 1;
 198                 heap->dpb.dir_entries = 2;
 199                 heap->dpb.first_data = 2;
 200                 heap->dpb.high_cluster = 64000;
 201                 heap->dpb.sectors_in_FAT = 1;
 202                 heap->dpb.start_dir = 1;
 203                 heap->dpb.driver_head = 0;
 204                 heap->dpb.media_ID = (drive > 1) ? 0xF8 : 0xF0;
 205                 heap->dpb.access_flag = 0;
 206                 heap->dpb.next = 0;
 207                 heap->dpb.free_search = 0;
 208                 heap->dpb.free_clusters = 0xFFFF;    /* unknown */
 209
 210                 AL_reg(context) = 0x00;
 211                 DS_reg(context) = SELECTOROF(dpbsegptr);
 212                 BX_reg(context) = OFFSETOF(dpbsegptr);
 213         }
 214 }
 215
 216
 217 static void ioctlGetDeviceInfo( CONTEXT *context )
 218 {
 219     dprintf_int (stddeb, "int21: ioctl (%d, GetDeviceInfo)\n", BX_reg(context));
 220
 221     DX_reg(context) = 0x0942;
 222     /* bits 0-5 are current drive
 223      * bit 6 - file has NOT been written..FIXME: correct?
 224      * bit 8 - generate int24 if no diskspace on write/ read past end of file
 225      * bit 11 - media not removable
 226      */
 227     RESET_CFLAG(context);
 228 }
 229
 230 static void ioctlGenericBlkDevReq( CONTEXT *context )
 231 {
 232         BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 233         int drive = DOS_GET_DRIVE( BL_reg(context) );
 234
 235         if (!DRIVE_IsValid(drive))
 236         {
 237             DOS_ERROR( ER_FileNotFound, EC_NotFound, SA_Abort, EL_Disk );
 238             AX_reg(context) = DOS_ExtendedError;
 239             SET_CFLAG(context);
 240             return;
 241         }
 242
 243         if (CH_reg(context) != 0x08)
 244         {
 245             INT_BARF( context, 0x21 );
 246             return;
 247         }
 248         switch (CL_reg(context)) {
 249                 case 0x4a: /* lock logical volume */
 250                         dprintf_int(stddeb,"int21: lock logical volume (%d) level %d mode %d\n",drive,BH_reg(context),DX_reg(context));
 251                         return;
 252                 case 0x60: /* get device parameters */
 253                            /* used by w4wgrp's winfile */
 254                         memset(dataptr, 0, 0x26);
 255                         dataptr[0] = 0x04;
 256                         dataptr[6] = 0; /* media type */
 257                         if (drive > 1)
 258                         {
 259                                 dataptr[1] = 0x05; /* fixed disk */
 260                                 setword(&dataptr[2], 0x01); /* non removable */
 261                                 setword(&dataptr[4], 0x300); /* # of cylinders */
 262                         }
 263                         else
 264                         {
 265                                 dataptr[1] = 0x07; /* block dev, floppy */
 266                                 setword(&dataptr[2], 0x02); /* removable */
 267                                 setword(&dataptr[4], 80); /* # of cylinders */
 268                         }
 269                         CreateBPB(drive, &dataptr[7]);
 270                         RESET_CFLAG(context);
 271                         return;
 272                 case 0x66:/*  get disk serial number */
 273                         {       char    label[12],fsname[9],path[4];
 274                                 DWORD   serial;
 275
 276                                 strcpy(path,"x:\\");path[0]=drive+'A';
 277                                 GetVolumeInformation32A(
 278                                         path,label,12,&serial,NULL,NULL,fsname,9
 279                                 );
 280                                 *(WORD*)dataptr         = 0;
 281                                 memcpy(dataptr+2,&serial,4);
 282                                 memcpy(dataptr+6,label  ,11);
 283                                 memcpy(dataptr+17,fsname,8);
 284                                 return;
 285                         }
 286                 case 0x6a:
 287                         dprintf_int(stddeb,"int21: logical volume %d unlocked.\n",drive);
 288                         return;
 289                 default:
 290                         INT_BARF( context, 0x21 );
 291         }
 292 }
 293
 294 static void INT21_GetSystemDate( CONTEXT *context )
 295 {
 296     SYSTEMTIME systime;
 297     GetLocalTime( &systime );
 298     CX_reg(context) = systime.wYear;
 299     DX_reg(context) = (systime.wMonth << 8) | systime.wDay;
 300     AX_reg(context) = systime.wDayOfWeek;
 301 }
 302
 303 static void INT21_GetSystemTime( CONTEXT *context )
 304 {
 305     SYSTEMTIME systime;
 306     GetLocalTime( &systime );
 307     CX_reg(context) = (systime.wHour << 8) | systime.wMinute;
 308     DX_reg(context) = (systime.wSecond << 8) | (systime.wMilliseconds / 10);
 309 }
 310
 311 static void INT21_CreateFile( CONTEXT *context )
 312 {
 313     AX_reg(context) = _lcreat16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
 314                                           DX_reg(context) ), CX_reg(context) );
 315     if (AX_reg(context) == (WORD)HFILE_ERROR16)
 316     {
 317         AX_reg(context) = DOS_ExtendedError;
 318         SET_CFLAG(context);
 319     }
 320 }
 321
 322
 323 void OpenExistingFile( CONTEXT *context )
 324 {
 325     AX_reg(context) = _lopen16( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
 326                               AL_reg(context) );
 327     if (AX_reg(context) == (WORD)HFILE_ERROR16)
 328     {
 329         AX_reg(context) = DOS_ExtendedError;
 330         SET_CFLAG(context);
 331     }
 332 #if 0
 333         int handle;
 334         int mode;
 335         int lock;
 336
 337         switch (AX_reg(context) & 0x0070)
 338         {
 339           case 0x00:    /* compatability mode */
 340           case 0x40:    /* DENYNONE */
 341             lock = -1;
 342             break;
 343
 344           case 0x30:    /* DENYREAD */
 345             dprintf_int(stddeb,
 346               "OpenExistingFile (%s): DENYREAD changed to DENYALL\n",
 347               (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)));
 348           case 0x10:    /* DENYALL */
 349             lock = LOCK_EX;
 350             break;
 351
 352           case 0x20:    /* DENYWRITE */
 353             lock = LOCK_SH;
 354             break;
 355
 356           default:
 357             lock = -1;
 358         }
 359
 360         if (lock != -1)
 361         {
 362
 363           int result,retries=sharing_retries;
 364           {
 365 #if defined(__svr4__) || defined(_SCO_DS)
 366               printf("Should call flock and needs porting to lockf\n");
 367               result = 0;
 368               retries = 0;
 369 #else
 370             result = flock(handle, lock | LOCK_NB);
 371 #endif
 372             if ( retries && (!result) )
 373             {
 374               int i;
 375               for(i=0;i<32768*((int)sharing_pause);i++)
 376                   result++;                          /* stop the optimizer */
 377               for(i=0;i<32768*((int)sharing_pause);i++)
 378                   result--;
 379             }
 380           }
 381           while( (!result) && (!(retries--)) );
 382
 383           if(result)
 384           {
 385             errno_to_doserr();
 386             AX_reg(context) = ExtendedError;
 387             close(handle);
 388             SET_CFLAG(context);
 389             return;
 390           }
 391
 392         }
 393
 394         Error (0,0,0);
 395         AX_reg(context) = handle;
 396         RESET_CFLAG(context);
 397 #endif
 398 }
 399
 400 static void CloseFile( CONTEXT *context )
 401 {
 402     if ((AX_reg(context) = _lclose16( BX_reg(context) )) != 0)
 403     {
 404         AX_reg(context) = DOS_ExtendedError;
 405         SET_CFLAG(context);
 406     }
 407 }
 408
 409 void ExtendedOpenCreateFile(CONTEXT *context )
 410 {
 411   BYTE action=DL_reg(context);
 412   /* Shuffle arguments to call OpenExistingFile */
 413   AL_reg(context) = BL_reg(context);
 414   DX_reg(context) = SI_reg(context);
 415   /* BX,CX and DX should be preserved */
 416   OpenExistingFile(context);
 417   if ((EFL_reg(context) & 0x0001)==0)
 418     { /* It exists */
 419       /* Now decide what do do */
 420       if ((action & 0x07)== 0)
 421         {
 422           BX_reg(context) = AX_reg(context);
 423           CloseFile(context);
 424           AX_reg(context) = 0x0050;/*File exists*/
 425           CX_reg(context) = 0;
 426           SET_CFLAG(context);
 427           dprintf_int(stddeb, "int21: extended open/create: failed because file exixts \n");
 428           return;
 429         }
 430       if ((action & 0x07)== 2) {
 431         /* Truncate it, but first check if opened for write */
 432         if ((BL_reg(context) & 0x0007)== 0) {
 433           BX_reg(context) = AX_reg(context);
 434           CloseFile(context);
 435           dprintf_int(stddeb, "int21: extended open/create: failed, trunc on ro file");
 436           AX_reg(context) = 0x000C;/*Access code invalid*/
 437           CX_reg(context) = 0;
 438           SET_CFLAG(context);
 439           return;
 440         }
 441         /* Shuffle arguments to call CloseFile */
 442         dprintf_int(stddeb, "int21: extended open/create: Closing before truncate\n");
 443         BX_reg(context) = AX_reg(context);
 444         /* BX and DX should be preserved */
 445         CloseFile(context);
 446         if (EFL_reg(context) & 0x0001) {
 447           dprintf_int(stddeb, "int21: extended open/create: close before trunc failed");
 448           AX_reg(context) = 0x0019;/*Seek Error*/
 449           CX_reg(context) = 0;
 450           SET_CFLAG(context);
 451         }
 452         /* Shuffle arguments to call CreateFile */
 453         dprintf_int(stddeb, "int21: extended open/create: Truncating\n");
 454         AL_reg(context) = BL_reg(context);
 455         /* CX is still the same */
 456         DX_reg(context) = SI_reg(context);
 457         INT21_CreateFile(context);
 458         if (EFL_reg(context) & 0x0001) { /*no file open, flags set */
 459           dprintf_int(stddeb, "int21: extended open/create: trunc failed");
 460           return;
 461         }
 462         CX_reg(context) = 3;
 463         return;
 464       }
 465       CX_reg(context) = 1;
 466       return;
 467     }
 468   else /* file does not exist */
 469     {
 470       RESET_CFLAG(context); /* was set by OpenExistingFile(context) */
 471       if ((action & 0xF0)== 0)
 472       {
 473         CX_reg(context) = 0;
 474         SET_CFLAG(context);
 475         dprintf_int(stddeb, "int21: extended open/create: failed, file dosen't exist\n");
 476         return;
 477       }
 478       /* Shuffle arguments to call CreateFile */
 479       dprintf_int(stddeb, "int21: extended open/create: Creating\n");
 480       AL_reg(context) = BL_reg(context);
 481       /* CX should still be the same */
 482       DX_reg(context) = SI_reg(context);
 483       INT21_CreateFile(context);
 484       if (EFL_reg(context) & 0x0001) { /*no file open, flags set */
 485         dprintf_int(stddeb, "int21: extended open/create: create failed\n");
 486         return;
 487       }
 488       CX_reg(context) = 2;
 489       return;
 490     }
 491 }
 492
 493
 494 static void INT21_ChangeDir( CONTEXT *context )
 495 {
 496     int drive;
 497     char *dirname = PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context));
 498
 499     dprintf_int(stddeb,"int21: changedir %s\n", dirname);
 500     if (dirname[0] && (dirname[1] == ':'))
 501     {
 502         drive = toupper(dirname[0]) - 'A';
 503         dirname += 2;
 504     }
 505     else drive = DRIVE_GetCurrentDrive();
 506     if (!DRIVE_Chdir( drive, dirname ))
 507     {
 508         AX_reg(context) = DOS_ExtendedError;
 509         SET_CFLAG(context);
 510     }
 511 }
 512
 513
 514 static int INT21_FindFirst( CONTEXT *context )
 515 {
 516     char *p;
 517     const char *path;
 518     DOS_FULL_NAME full_name;
 519     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA();
 520
 521     path = (const char *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 522     dta->unixPath = NULL;
 523     if (!DOSFS_GetFullName( path, FALSE, &full_name ))
 524     {
 525         AX_reg(context) = DOS_ExtendedError;
 526         SET_CFLAG(context);
 527         return 0;
 528     }
 529     dta->unixPath = xstrdup( full_name.long_name );
 530     p = strrchr( dta->unixPath, '/' );
 531     *p = '\0';
 532
 533     /* Note: terminating NULL in dta->mask overwrites dta->search_attr
 534      *       (doesn't matter as it is set below anyway)
 535      */
 536     if (!DOSFS_ToDosFCBFormat( p + 1, dta->mask ))
 537     {
 538         free( dta->unixPath );
 539         dta->unixPath = NULL;
 540         DOS_ERROR( ER_FileNotFound, EC_NotFound, SA_Abort, EL_Disk );
 541         AX_reg(context) = ER_FileNotFound;
 542         SET_CFLAG(context);
 543         return 0;
 544     }
 545     dta->drive = (path[0] && (path[1] == ':')) ? toupper(path[0]) - 'A'
 546                                                : DRIVE_GetCurrentDrive();
 547     dta->count = 0;
 548     dta->search_attr = CL_reg(context);
 549     return 1;
 550 }
 551
 552
 553 static int INT21_FindNext( CONTEXT *context )
 554 {
 555     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA();
 556     WIN32_FIND_DATA32A entry;
 557     int count;
 558
 559     if (!dta->unixPath) return 0;
 560     if (!(count = DOSFS_FindNext( dta->unixPath, dta->mask, NULL, dta->drive,
 561                                   dta->search_attr, dta->count, &entry )))
 562     {
 563         free( dta->unixPath );
 564         dta->unixPath = NULL;
 565         return 0;
 566     }
 567     if ((int)dta->count + count > 0xffff)
 568     {
 569         fprintf( stderr, "Too many directory entries in %s\n", dta->unixPath );
 570         free( dta->unixPath );
 571         dta->unixPath = NULL;
 572         return 0;
 573     }
 574     dta->count += count;
 575     dta->fileattr = entry.dwFileAttributes;
 576     dta->filesize = entry.nFileSizeLow;
 577     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 578                            &dta->filedate, &dta->filetime );
 579     strcpy( dta->filename, entry.cAlternateFileName );
 580     return 1;
 581 }
 582
 583
 584 static int INT21_CreateTempFile( CONTEXT *context )
 585 {
 586     static int counter = 0;
 587     char *name = PTR_SEG_OFF_TO_LIN( DS_reg(context), DX_reg(context) );
 588     char *p = name + strlen(name);
 589
 590     for (;;)
 591     {
 592         sprintf( p, "wine%04x.%03d", (int)getpid(), counter );
 593         counter = (counter + 1) % 1000;
 594
 595         if ((AX_reg(context) = _lcreat_uniq( name, 0 )) != (WORD)HFILE_ERROR16)
 596         {
 597             dprintf_int( stddeb, "INT21_CreateTempFile: created %s\n", name );
 598             return 1;
 599         }
 600         if (DOS_ExtendedError != ER_FileExists) return 0;
 601     }
 602 }
 603
 604
 605 static int INT21_GetCurrentDirectory( CONTEXT *context )
 606 {
 607     int drive = DOS_GET_DRIVE( DL_reg(context) );
 608     char *ptr = (char *)PTR_SEG_OFF_TO_LIN( DS_reg(context), SI_reg(context) );
 609
 610     if (!DRIVE_IsValid(drive))
 611     {
 612         DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
 613         return 0;
 614     }
 615
 616     lstrcpyn32A( ptr, DRIVE_GetDosCwd(drive), 64 );
 617     return 1;
 618 }
 619
 620
 621 static int INT21_GetDiskSerialNumber( CONTEXT *context )
 622 {
 623     BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 624     int drive = DOS_GET_DRIVE( BL_reg(context) );
 625
 626     if (!DRIVE_IsValid(drive))
 627     {
 628         DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
 629         return 0;
 630     }
 631
 632     *(WORD *)dataptr = 0;
 633     *(DWORD *)(dataptr + 2) = DRIVE_GetSerialNumber( drive );
 634     memcpy( dataptr + 6, DRIVE_GetLabel( drive ), 11 );
 635     strncpy(dataptr + 0x11, "FAT16   ", 8);
 636     return 1;
 637 }
 638
 639
 640 static int INT21_SetDiskSerialNumber( CONTEXT *context )
 641 {
 642     BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 643     int drive = DOS_GET_DRIVE( BL_reg(context) );
 644
 645     if (!DRIVE_IsValid(drive))
 646     {
 647         DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
 648         return 0;
 649     }
 650
 651     DRIVE_SetSerialNumber( drive, *(DWORD *)(dataptr + 2) );
 652     return 1;
 653 }
 654
 655
 656 /* microsoft's programmers should be shot for using CP/M style int21
 657    calls in Windows for Workgroup's winfile.exe */
 658
 659 static int INT21_FindFirstFCB( CONTEXT *context )
 660 {
 661     BYTE *fcb = (BYTE *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 662     FINDFILE_FCB *pFCB;
 663     LPCSTR root, cwd;
 664     int drive;
 665
 666     if (*fcb == 0xff) pFCB = (FINDFILE_FCB *)(fcb + 7);
 667     else pFCB = (FINDFILE_FCB *)fcb;
 668     drive = DOS_GET_DRIVE( pFCB->drive );
 669     root = DRIVE_GetRoot( drive );
 670     cwd  = DRIVE_GetUnixCwd( drive );
 671     pFCB->unixPath = HeapAlloc( SystemHeap, 0, strlen(root)+strlen(cwd)+2 );
 672     if (!pFCB->unixPath) return 0;
 673     strcpy( pFCB->unixPath, root );
 674     strcat( pFCB->unixPath, "/" );
 675     strcat( pFCB->unixPath, cwd );
 676     pFCB->count = 0;
 677     return 1;
 678 }
 679
 680
 681 static int INT21_FindNextFCB( CONTEXT *context )
 682 {
 683     BYTE *fcb = (BYTE *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 684     FINDFILE_FCB *pFCB;
 685     DOS_DIRENTRY_LAYOUT *pResult = (DOS_DIRENTRY_LAYOUT *)GetCurrentDTA();
 686     WIN32_FIND_DATA32A entry;
 687     BYTE attr;
 688     int count;
 689
 690     if (*fcb == 0xff)
 691     {
 692         attr = fcb[6];
 693         pFCB = (FINDFILE_FCB *)(fcb + 7);
 694     }
 695     else
 696     {
 697         attr = 0;
 698         pFCB = (FINDFILE_FCB *)fcb;
 699     }
 700
 701     if (!pFCB->unixPath) return 0;
 702     if (!(count = DOSFS_FindNext( pFCB->unixPath, pFCB->filename, NULL,
 703                                   DOS_GET_DRIVE( pFCB->drive ), attr,
 704                                   pFCB->count, &entry )))
 705     {
 706         HeapFree( SystemHeap, 0, pFCB->unixPath );
 707         pFCB->unixPath = NULL;
 708         return 0;
 709     }
 710     pFCB->count += count;
 711
 712     pResult->fileattr = entry.dwFileAttributes;
 713     pResult->cluster  = 0;  /* what else? */
 714     pResult->filesize = entry.nFileSizeLow;
 715     memset( pResult->reserved, 0, sizeof(pResult->reserved) );
 716     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 717                            &pResult->filedate, &pResult->filetime );
 718
 719     /* Convert file name to FCB format */
 720
 721     memset( pResult->filename, ' ', sizeof(pResult->filename) );
 722     if (!strcmp( entry.cAlternateFileName, "." )) pResult->filename[0] = '.';
 723     else if (!strcmp( entry.cAlternateFileName, ".." ))
 724         pResult->filename[0] = pResult->filename[1] = '.';
 725     else
 726     {
 727         char *p = strrchr( entry.cAlternateFileName, '.' );
 728         if (p && p[1] && (p != entry.cAlternateFileName))
 729         {
 730             memcpy( pResult->filename, entry.cAlternateFileName,
 731                     MIN( (p - entry.cAlternateFileName), 8 ) );
 732             memcpy( pResult->filename + 8, p + 1, MIN( strlen(p), 3 ) );
 733         }
 734         else
 735             memcpy( pResult->filename, entry.cAlternateFileName,
 736                     MIN( strlen(entry.cAlternateFileName), 8 ) );
 737     }
 738     return 1;
 739 }
 740
 741
 742 static void DeleteFileFCB( CONTEXT *context )
 743 {
 744     fprintf( stderr, "DeleteFileFCB: not implemented yet\n" );
 745 #if 0
 746         BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 747         struct dosdirent *dp;
 748         char temp[256], *ptr;
 749         int drive = DOS_GET_DRIVE( *fcb );
 750
 751         DumpFCB( fcb );
 752
 753         temp[0] = '\\';
 754         strcpy(temp+1, DRIVE_GetDosCwd(drive));
 755         strcat(temp, "\\");
 756         strncat(temp, fcb + 1, 8);
 757         ChopOffWhiteSpace(temp);
 758         strncat(temp, fcb + 9, 3);
 759         ChopOffWhiteSpace(temp);
 760
 761         if ((dp = DOS_opendir(temp)) == NULL) {
 762                 Error(InvalidDrive, EC_MediaError , EL_Disk);
 763                 AX_reg(context) = 0xff;
 764                 return;
 765         }
 766
 767         temp[0] = '\\';
 768         strcpy(temp+1, DRIVE_GetDosCwd(drive) );
 769         strcat(temp, "\\");
 770
 771         ptr = temp + strlen(temp);
 772
 773         while (DOS_readdir(dp) != NULL)
 774         {
 775                 strcpy(ptr, dp->filename);
 776                 dprintf_int(stddeb, "int21: delete file %s\n", temp);
 777                 /* unlink(DOS_GetUnixFileName(temp)); */
 778         }
 779         DOS_closedir(dp);
 780         AX_reg(context) = 0;
 781 #endif
 782 }
 783
 784 static void RenameFileFCB( CONTEXT *context )
 785 {
 786     fprintf( stderr, "RenameFileFCB: not implemented yet\n" );
 787 #if 0
 788         BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
 789         struct dosdirent *dp;
 790         char temp[256], oldname[256], newname[256], *oldnameptr, *newnameptr;
 791         int drive = DOS_GET_DRIVE( *fcb );
 792
 793         DumpFCB( fcb );
 794
 795         temp[0] = '\\';
 796         strcpy(temp+1, DRIVE_GetDosCwd(drive) );
 797         strcat(temp, "\\");
 798         strncat(temp, fcb + 1, 8);
 799         ChopOffWhiteSpace(temp);
 800         strncat(temp, fcb + 9, 3);
 801         ChopOffWhiteSpace(temp);
 802
 803         if ((dp = DOS_opendir(temp)) == NULL) {
 804                 Error(InvalidDrive, EC_MediaError , EL_Disk);
 805                 AX_reg(context) = 0xff;
 806                 return;
 807         }
 808
 809         oldname[0] = '\\';
 810         strcpy(oldname+1, DRIVE_GetDosCwd(drive) );
 811         strcat(oldname, "\\");
 812         strcpy( newname, oldname );
 813         oldnameptr = oldname + strlen(oldname);
 814         newnameptr = newname + strlen(newname);
 815
 816         while (DOS_readdir(dp) != NULL)
 817         {
 818                 strcpy(oldnameptr, dp->filename);
 819                 strcpy(newnameptr, fcb + 1);
 820                 dprintf_int(stddeb, "int21: renamefile %s -> %s\n",
 821                         oldname, newname);
 822         }
 823         DOS_closedir(dp);
 824         AX_reg(context) = 0;
 825 #endif
 826 }
 827
 828
 829
 830 static void fLock( CONTEXT * context )
 831 {
 832 #if 0
 833     struct flock f;
 834     int result,retries=sharing_retries;
 835
 836     f.l_start = MAKELONG(DX_reg(context),CX_reg(context));
 837     f.l_len   = MAKELONG(DI_reg(context),SI_reg(context));
 838     f.l_whence = 0;
 839     f.l_pid = 0;
 840
 841     switch ( AX_reg(context) & 0xff )
 842     {
 843         case 0x00: /* LOCK */
 844           f.l_type = F_WRLCK;
 845           break;
 846
 847         case 0x01: /* UNLOCK */
 848           f.l_type = F_UNLCK;
 849           break;
 850
 851         default:
 852           AX_reg(context) = 0x0001;
 853           SET_CFLAG(context);
 854           return;
 855      }
 856
 857      {
 858           result = fcntl(BX_reg(context),F_SETLK,&f);
 859           if ( retries && (!result) )
 860           {
 861               int i;
 862               for(i=0;i<32768*((int)sharing_pause);i++)
 863                   result++;                          /* stop the optimizer */
 864               for(i=0;i<32768*((int)sharing_pause);i++)
 865                   result--;
 866           }
 867       }
 868       while( (!result) && (!(retries--)) );
 869
 870       if(result)
 871       {
 872           FILE_SetDosError();
 873           AX_reg(context) = DOS_ExtendedError;
 874           SET_CFLAG(context);
 875           return;
 876       }
 877 #endif
 878 }
 879
 880
 881 extern void LOCAL_PrintHeap (WORD ds);
 882
 883 /***********************************************************************
 884  *           DOS3Call  (KERNEL.102)
 885  */
 886 void DOS3Call( CONTEXT *context )
 887 {
 888     dprintf_int( stddeb, "int21: AX=%04x BX=%04x CX=%04x DX=%04x "
 889                  "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
 890                  AX_reg(context), BX_reg(context), CX_reg(context),
 891                  DX_reg(context), SI_reg(context), DI_reg(context),
 892                  (WORD)DS_reg(context), (WORD)ES_reg(context),
 893                  EFL_reg(context) );
 894
 895     if (AH_reg(context) == 0x59)  /* Get extended error info */
 896     {
 897         AX_reg(context) = DOS_ExtendedError;
 898         BH_reg(context) = DOS_ErrorClass;
 899         BL_reg(context) = DOS_ErrorAction;
 900         CH_reg(context) = DOS_ErrorLocus;
 901         return;
 902     }
 903
 904     DOS_ERROR( 0, 0, 0, 0 );
 905     RESET_CFLAG(context);  /* Not sure if this is a good idea */
 906
 907     switch(AH_reg(context))
 908     {
 909     case 0x00: /* TERMINATE PROGRAM */
 910         TASK_KillCurrentTask( 0 );
 911         break;
 912
 913     case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
 914     case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
 915     case 0x03: /* READ CHARACTER FROM STDAUX  */
 916     case 0x04: /* WRITE CHARACTER TO STDAUX */
 917     case 0x05: /* WRITE CHARACTER TO PRINTER */
 918     case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
 919     case 0x07: /* DIRECT CHARACTER INPUT, WITHOUT ECHO */
 920     case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
 921     case 0x09: /* WRITE STRING TO STANDARD OUTPUT */
 922     case 0x0a: /* BUFFERED INPUT */
 923     case 0x0b: /* GET STDIN STATUS */
 924     case 0x0c: /* FLUSH BUFFER AND READ STANDARD INPUT */
 925     case 0x0f: /* OPEN FILE USING FCB */
 926     case 0x10: /* CLOSE FILE USING FCB */
 927     case 0x14: /* SEQUENTIAL READ FROM FCB FILE */
 928     case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */
 929     case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */
 930     case 0x21: /* READ RANDOM RECORD FROM FCB FILE */
 931     case 0x22: /* WRITE RANDOM RECORD TO FCB FILE */
 932     case 0x23: /* GET FILE SIZE FOR FCB */
 933     case 0x24: /* SET RANDOM RECORD NUMBER FOR FCB */
 934     case 0x26: /* CREATE NEW PROGRAM SEGMENT PREFIX */
 935     case 0x27: /* RANDOM BLOCK READ FROM FCB FILE */
 936     case 0x28: /* RANDOM BLOCK WRITE TO FCB FILE */
 937     case 0x29: /* PARSE FILENAME INTO FCB */
 938     case 0x2e: /* SET VERIFY FLAG */
 939     case 0x37: /* "SWITCHAR" - GET SWITCH CHARACTER
 940                   "SWITCHAR" - SET SWITCH CHARACTER
 941                   "AVAILDEV" - SPECIFY \DEV\ PREFIX USE */
 942     case 0x54: /* GET VERIFY FLAG */
 943         INT_BARF( context, 0x21 );
 944         break;
 945
 946     case 0x18: /* NULL FUNCTIONS FOR CP/M COMPATIBILITY */
 947     case 0x1d:
 948     case 0x1e:
 949     case 0x20:
 950     case 0x6b: /* NULL FUNCTION */
 951         AL_reg(context) = 0;
 952         break;
 953
 954     case 0x5c: /* "FLOCK" - RECORD LOCKING */
 955         fLock(context);
 956         break;
 957
 958     case 0x0d: /* DISK BUFFER FLUSH */
 959         RESET_CFLAG(context); /* dos 6+ only */
 960         break;
 961
 962     case 0x0e: /* SELECT DEFAULT DRIVE */
 963         DRIVE_SetCurrentDrive( DL_reg(context) );
 964         AL_reg(context) = MAX_DOS_DRIVES;
 965         break;
 966
 967     case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
 968         if (!INT21_FindFirstFCB(context))
 969         {
 970             AL_reg(context) = 0xff;
 971             break;
 972         }
 973         /* else fall through */
 974
 975     case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
 976         AL_reg(context) = INT21_FindNextFCB(context) ? 0x00 : 0xff;
 977         break;
 978
 979     case 0x13: /* DELETE FILE USING FCB */
 980         DeleteFileFCB(context);
 981         break;
 982
 983     case 0x17: /* RENAME FILE USING FCB */
 984         RenameFileFCB(context);
 985         break;
 986
 987     case 0x19: /* GET CURRENT DEFAULT DRIVE */
 988         AL_reg(context) = DRIVE_GetCurrentDrive();
 989         break;
 990
 991     case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
 992         {
 993             TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 994             pTask->dta = PTR_SEG_OFF_TO_SEGPTR(DS_reg(context),DX_reg(context));
 995             dprintf_int(stddeb, "int21: Set DTA: %08lx\n", pTask->dta);
 996         }
 997         break;
 998
 999     case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
1000         DL_reg(context) = 0;
1001         if (!INT21_GetDriveAllocInfo(context)) AX_reg(context) = 0xffff;
1002         break;
1003
1004     case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
1005         if (!INT21_GetDriveAllocInfo(context)) AX_reg(context) = 0xffff;
1006         break;
1007
1008     case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
1009         GetDrivePB(context, DRIVE_GetCurrentDrive());
1010         break;
1011
1012     case 0x25: /* SET INTERRUPT VECTOR */
1013         INT_SetHandler( AL_reg(context),
1014                         (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( DS_reg(context),
1015                                                           DX_reg(context)));
1016         break;
1017
1018     case 0x2a: /* GET SYSTEM DATE */
1019         INT21_GetSystemDate(context);
1020         break;
1021
1022     case 0x2b: /* SET SYSTEM DATE */
1023         fprintf( stdnimp, "SetSystemDate(%02d/%02d/%04d): not allowed\n",
1024                  DL_reg(context), DH_reg(context), CX_reg(context) );
1025         AL_reg(context) = 0;  /* Let's pretend we succeeded */
1026         break;
1027
1028     case 0x2c: /* GET SYSTEM TIME */
1029         INT21_GetSystemTime(context);
1030         break;
1031
1032     case 0x2d: /* SET SYSTEM TIME */
1033         fprintf( stdnimp, "SetSystemTime(%02d:%02d:%02d.%02d): not allowed\n",
1034                  CH_reg(context), CL_reg(context),
1035                  DH_reg(context), DL_reg(context) );
1036         AL_reg(context) = 0;  /* Let's pretend we succeeded */
1037         break;
1038
1039     case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */
1040         {
1041             TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
1042             ES_reg(context) = SELECTOROF( pTask->dta );
1043             BX_reg(context) = OFFSETOF( pTask->dta );
1044         }
1045         break;
1046
1047     case 0x30: /* GET DOS VERSION */
1048         AX_reg(context) = DOSVERSION;
1049         BX_reg(context) = 0x0012;     /* 0x123456 is Wine's serial # */
1050         CX_reg(context) = 0x3456;
1051         break;
1052
1053     case 0x31: /* TERMINATE AND STAY RESIDENT */
1054         INT_BARF( context, 0x21 );
1055         break;
1056
1057     case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
1058         GetDrivePB(context, DOS_GET_DRIVE( DL_reg(context) ) );
1059         break;
1060
1061     case 0x33: /* MULTIPLEXED */
1062         switch (AL_reg(context))
1063         {
1064               case 0x00: /* GET CURRENT EXTENDED BREAK STATE */
1065                 DL_reg(context) = 0;
1066                 break;
1067
1068               case 0x01: /* SET EXTENDED BREAK STATE */
1069                 break;
1070
1071               case 0x02: /* GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE*/
1072                 DL_reg(context) = 0;
1073                 break;
1074
1075               case 0x05: /* GET BOOT DRIVE */
1076                 DL_reg(context) = 3;
1077                 /* c: is Wine's bootdrive (a: is 1)*/
1078                 break;
1079
1080               case 0x06: /* GET TRUE VERSION NUMBER */
1081                 BX_reg(context) = DOSVERSION;
1082                 DX_reg(context) = 0x00;
1083                 break;
1084
1085               default:
1086                 INT_BARF( context, 0x21 );
1087                 break;
1088         }
1089         break;
1090
1091     case 0x34: /* GET ADDRESS OF INDOS FLAG */
1092         if (!heap) INT21_CreateHeap();
1093         ES_reg(context) = DosHeapHandle;
1094         BX_reg(context) = (int)&heap->InDosFlag - (int)heap;
1095         break;
1096
1097     case 0x35: /* GET INTERRUPT VECTOR */
1098         {
1099             FARPROC16 addr = INT_GetHandler( AL_reg(context) );
1100             ES_reg(context) = SELECTOROF(addr);
1101             BX_reg(context) = OFFSETOF(addr);
1102         }
1103         break;
1104
1105     case 0x36: /* GET FREE DISK SPACE */
1106         if (!INT21_GetFreeDiskSpace(context)) AX_reg(context) = 0xffff;
1107         break;
1108
1109     case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
1110         AX_reg(context) = 0x02; /* no country support available */
1111         SET_CFLAG(context);
1112         break;
1113
1114     case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */
1115         if (!CreateDirectory16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1116                                                     DX_reg(context) ), NULL))
1117         {
1118             AX_reg(context) = DOS_ExtendedError;
1119             SET_CFLAG(context);
1120         }
1121         break;
1122
1123     case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */
1124         if (!RemoveDirectory16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1125                                                     DX_reg(context) )))
1126         {
1127             AX_reg(context) = DOS_ExtendedError;
1128             SET_CFLAG(context);
1129         }
1130         break;
1131
1132     case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
1133         INT21_ChangeDir(context);
1134         break;
1135
1136     case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
1137         AX_reg(context) = _lcreat16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1138                                     DX_reg(context) ), CX_reg(context) );
1139         if (AX_reg(context) == (WORD)HFILE_ERROR16)
1140         {
1141             AX_reg(context) = DOS_ExtendedError;
1142             SET_CFLAG(context);
1143         }
1144         break;
1145
1146     case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
1147         OpenExistingFile(context);
1148         break;
1149
1150     case 0x3e: /* "CLOSE" - CLOSE FILE */
1151         if ((AX_reg(context) = _lclose16( BX_reg(context) )) != 0)
1152         {
1153             AX_reg(context) = DOS_ExtendedError;
1154             SET_CFLAG(context);
1155         }
1156         break;
1157
1158     case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */
1159         {
1160             LONG result = WIN16_hread( BX_reg(context),
1161                                        PTR_SEG_OFF_TO_SEGPTR( DS_reg(context),
1162                                                               DX_reg(context) ),
1163                                        CX_reg(context) );
1164             if (result == -1)
1165             {
1166                 AX_reg(context) = DOS_ExtendedError;
1167                 SET_CFLAG(context);
1168             }
1169             else AX_reg(context) = (WORD)result;
1170         }
1171         break;
1172
1173     case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */
1174         {
1175             LONG result = _hwrite16( BX_reg(context),
1176                                      PTR_SEG_OFF_TO_LIN( DS_reg(context),
1177                                                          DX_reg(context) ),
1178                                      CX_reg(context) );
1179             if (result == -1)
1180             {
1181                 AX_reg(context) = DOS_ExtendedError;
1182                 SET_CFLAG(context);
1183             }
1184             else AX_reg(context) = (WORD)result;
1185         }
1186         break;
1187
1188     case 0x41: /* "UNLINK" - DELETE FILE */
1189         if (!DeleteFile32A( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1190                                                 DX_reg(context) )))
1191         {
1192             AX_reg(context) = DOS_ExtendedError;
1193             SET_CFLAG(context);
1194         }
1195         break;
1196
1197     case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
1198         {
1199             LONG status = _llseek16( BX_reg(context),
1200                                      MAKELONG(DX_reg(context),CX_reg(context)),
1201                                      AL_reg(context) );
1202             if (status == -1)
1203             {
1204                 AX_reg(context) = DOS_ExtendedError;
1205                 SET_CFLAG(context);
1206                 break;
1207             }
1208             AX_reg(context) = LOWORD(status);
1209             DX_reg(context) = HIWORD(status);
1210         }
1211         break;
1212
1213     case 0x43: /* FILE ATTRIBUTES */
1214         switch (AL_reg(context))
1215         {
1216         case 0x00:
1217             AX_reg(context) = (WORD)GetFileAttributes32A(
1218                                           PTR_SEG_OFF_TO_LIN(DS_reg(context),
1219                                                              DX_reg(context)));
1220             if (AX_reg(context) == 0xffff)
1221             {
1222                 AX_reg(context) = DOS_ExtendedError;
1223                 SET_CFLAG(context);
1224             }
1225             else CX_reg(context) = AX_reg(context);
1226             break;
1227         case 0x01:
1228             if (!SetFileAttributes32A( PTR_SEG_OFF_TO_LIN(DS_reg(context),
1229                                                           DX_reg(context)),
1230                                        CX_reg(context) ))
1231             {
1232                 AX_reg(context) = DOS_ExtendedError;
1233                 SET_CFLAG(context);
1234             }
1235             break;
1236         }
1237         break;
1238
1239     case 0x44: /* IOCTL */
1240         switch (AL_reg(context))
1241         {
1242         case 0x00:
1243             ioctlGetDeviceInfo(context);
1244             break;
1245
1246         case 0x01:
1247             break;
1248         case 0x05:{     /* IOCTL - WRITE TO BLOCK DEVICE CONTROL CHANNEL */
1249             BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context));
1250             int i;
1251             int drive = DOS_GET_DRIVE(BL_reg(context));
1252
1253             fprintf(stdnimp,"int21: program tried to write to block device control channel of drive %d:\n",drive);
1254             for (i=0;i<CX_reg(context);i++)
1255                 fprintf(stdnimp,"%02x ",dataptr[i]);
1256             fprintf(stdnimp,"\n");
1257             AX_reg(context)=CX_reg(context);
1258             break;
1259         }
1260         case 0x08:   /* Check if drive is removable. */
1261             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1262             {
1263             case DRIVE_CANNOTDETERMINE:
1264                 DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
1265                 AX_reg(context) = ER_InvalidDrive;
1266                 SET_CFLAG(context);
1267                 break;
1268             case DRIVE_REMOVABLE:
1269                 AX_reg(context) = 0;      /* removable */
1270                 break;
1271             default:
1272                 AX_reg(context) = 1;   /* not removable */
1273                 break;
1274             }
1275             break;
1276
1277         case 0x09:   /* CHECK IF BLOCK DEVICE REMOTE */
1278             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1279             {
1280             case DRIVE_CANNOTDETERMINE:
1281                 DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
1282                 AX_reg(context) = ER_InvalidDrive;
1283                 SET_CFLAG(context);
1284                 break;
1285             case DRIVE_REMOTE:
1286                 DX_reg(context) = (1<<9) | (1<<12);  /* remote */
1287                 break;
1288             default:
1289                 DX_reg(context) = 0;  /* FIXME: use driver attr here */
1290                 break;
1291             }
1292             break;
1293
1294         case 0x0a: /* check if handle (BX) is remote */
1295             /* returns DX, bit 15 set if remote, bit 14 set if date/time
1296              * not set on close
1297              */
1298             DX_reg(context) = 0;
1299             break;
1300
1301         case 0x0b:   /* SET SHARING RETRY COUNT */
1302             if (!CX_reg(context))
1303             {
1304                 AX_reg(context) = 1;
1305                 SET_CFLAG(context);
1306                 break;
1307             }
1308             sharing_pause = CX_reg(context);
1309             if (!DX_reg(context))
1310                 sharing_retries = DX_reg(context);
1311             RESET_CFLAG(context);
1312             break;
1313
1314         case 0x0d:
1315             ioctlGenericBlkDevReq(context);
1316             break;
1317         case 0x0e: /* get logical drive mapping */
1318             AL_reg(context) = 0; /* drive has no mapping */
1319             break;
1320
1321         case 0x0F:   /* Set logical drive mapping */
1322             /* FIXME: Not implemented at the moment, always returns error
1323              */
1324             INT_BARF( context, 0x21 );
1325             AX_reg(context) = 0x0001; /* invalid function */
1326             SET_CFLAG(context);
1327             break;
1328
1329         default:
1330             INT_BARF( context, 0x21 );
1331             break;
1332         }
1333         break;
1334
1335     case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */
1336         if ((AX_reg(context) = FILE_Dup(BX_reg(context))) == (WORD)HFILE_ERROR16)
1337         {
1338             AX_reg(context) = DOS_ExtendedError;
1339             SET_CFLAG(context);
1340         }
1341         break;
1342
1343     case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
1344         if (FILE_Dup2( BX_reg(context), CX_reg(context) ) == HFILE_ERROR32)
1345         {
1346             AX_reg(context) = DOS_ExtendedError;
1347             SET_CFLAG(context);
1348         }
1349        else AX_reg(context) = 0x0100;
1350         /* intlist: many Microsoft products for Windows rely on this */
1351         break;
1352
1353     case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
1354         if (!INT21_GetCurrentDirectory(context))
1355         {
1356             AX_reg(context) = DOS_ExtendedError;
1357             SET_CFLAG(context);
1358         }
1359         break;
1360
1361     case 0x48: /* ALLOCATE MEMORY */
1362     case 0x49: /* FREE MEMORY */
1363     case 0x4a: /* RESIZE MEMORY BLOCK */
1364         INT_BARF( context, 0x21 );
1365         break;
1366
1367     case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
1368         AX_reg(context) = WinExec16( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1369                                                          DX_reg(context) ),
1370                                      SW_NORMAL );
1371         if (AX_reg(context) < 32) SET_CFLAG(context);
1372         break;
1373
1374     case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
1375         TASK_KillCurrentTask( AL_reg(context) );
1376         break;
1377
1378     case 0x4d: /* GET RETURN CODE */
1379         AX_reg(context) = 0; /* normal exit */
1380         break;
1381
1382     case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
1383         if (!INT21_FindFirst(context)) break;
1384         /* fall through */
1385
1386     case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
1387         if (!INT21_FindNext(context))
1388         {
1389             DOS_ERROR( ER_NoMoreFiles, EC_MediaError, SA_Abort, EL_Disk );
1390             AX_reg(context) = ER_NoMoreFiles;
1391             SET_CFLAG(context);
1392         }
1393         break;
1394
1395     case 0x51: /* GET PSP ADDRESS */
1396     case 0x62: /* GET PSP ADDRESS */
1397         /* FIXME: should we return the original DOS PSP upon */
1398         /*        Windows startup ? */
1399         BX_reg(context) = GetCurrentPDB();
1400         break;
1401
1402     case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
1403         ES_reg(context) = 0x0;
1404         BX_reg(context) = 0x0;
1405         INT_BARF( context, 0x21 );
1406         break;
1407
1408     case 0x56: /* "RENAME" - RENAME FILE */
1409         if (!MoveFile32A( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
1410                           PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context))))
1411         {
1412             AX_reg(context) = DOS_ExtendedError;
1413             SET_CFLAG(context);
1414         }
1415         break;
1416
1417     case 0x57: /* FILE DATE AND TIME */
1418         switch (AL_reg(context))
1419         {
1420         case 0x00:  /* Get */
1421             {
1422                 FILETIME filetime;
1423                 if (!GetFileTime( BX_reg(context), NULL, NULL, &filetime ))
1424                 {
1425                     AX_reg(context) = DOS_ExtendedError;
1426                     SET_CFLAG(context);
1427                 }
1428                 else FileTimeToDosDateTime( &filetime, &DX_reg(context),
1429                                             &CX_reg(context) );
1430             }
1431             break;
1432
1433         case 0x01:  /* Set */
1434             {
1435                 FILETIME filetime;
1436                 DosDateTimeToFileTime( DX_reg(context), CX_reg(context),
1437                                        &filetime );
1438                 if (!SetFileTime( BX_reg(context), NULL, NULL, &filetime ))
1439                 {
1440                     AX_reg(context) = DOS_ExtendedError;
1441                     SET_CFLAG(context);
1442                 }
1443             }
1444             break;
1445         }
1446         break;
1447
1448     case 0x58: /* GET OR SET MEMORY/UMB ALLOCATION STRATEGY */
1449         switch (AL_reg(context))
1450         {
1451         case 0x00:
1452             AX_reg(context) = 1;
1453             break;
1454         case 0x02:
1455             AX_reg(context) = 0;
1456             break;
1457         case 0x01:
1458         case 0x03:
1459             break;
1460         }
1461         RESET_CFLAG(context);
1462         break;
1463
1464     case 0x5a: /* CREATE TEMPORARY FILE */
1465         if (!INT21_CreateTempFile(context))
1466         {
1467             AX_reg(context) = DOS_ExtendedError;
1468             SET_CFLAG(context);
1469         }
1470         break;
1471
1472     case 0x5b: /* CREATE NEW FILE */
1473         if ((AX_reg(context) = _lcreat_uniq( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)), 0 )) == (WORD)HFILE_ERROR16)
1474         {
1475             AX_reg(context) = DOS_ExtendedError;
1476             SET_CFLAG(context);
1477         }
1478         break;
1479
1480     case 0x5d: /* NETWORK */
1481     case 0x5e:
1482         /* network software not installed */
1483         DOS_ERROR( ER_NoNetwork, EC_NotFound, SA_Abort, EL_Network );
1484         AX_reg(context) = DOS_ExtendedError;
1485         SET_CFLAG(context);
1486         break;
1487
1488     case 0x5f: /* NETWORK */
1489         switch (AL_reg(context))
1490         {
1491         case 0x07: /* ENABLE DRIVE */
1492             if (!DRIVE_Enable( DL_reg(context) ))
1493             {
1494                 DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
1495                 AX_reg(context) = DOS_ExtendedError;
1496                 SET_CFLAG(context);
1497             }
1498             break;
1499
1500         case 0x08: /* DISABLE DRIVE */
1501             if (!DRIVE_Disable( DL_reg(context) ))
1502             {
1503                 DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
1504                 AX_reg(context) = DOS_ExtendedError;
1505                 SET_CFLAG(context);
1506             }
1507             break;
1508
1509         default:
1510             /* network software not installed */
1511             DOS_ERROR( ER_NoNetwork, EC_NotFound, SA_Abort, EL_Network );
1512             AX_reg(context) = DOS_ExtendedError;
1513             SET_CFLAG(context);
1514             break;
1515         }
1516         break;
1517
1518     case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
1519         {
1520             if (!GetFullPathName32A( PTR_SEG_OFF_TO_LIN(DS_reg(context),
1521                                                         SI_reg(context)), 128,
1522                                      PTR_SEG_OFF_TO_LIN(ES_reg(context),
1523                                                         DI_reg(context)),NULL))
1524             {
1525                 AX_reg(context) = DOS_ExtendedError;
1526                 SET_CFLAG(context);
1527             }
1528             else AX_reg(context) = 0;
1529         }
1530         break;
1531
1532     case 0x61: /* UNUSED */
1533     case 0x63: /* UNUSED */
1534     case 0x64: /* OS/2 DOS BOX */
1535         INT_BARF( context, 0x21 );
1536         SET_CFLAG(context);
1537         break;
1538     case 0x65:{/* GET EXTENDED COUNTRY INFORMATION */
1539         extern WORD WINE_LanguageId;
1540         BYTE    *dataptr=PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context));;
1541         switch (AL_reg(context)) {
1542         case 0x01:
1543             dataptr[0] = 0x1;
1544             *(WORD*)(dataptr+1) = 41;
1545             *(WORD*)(dataptr+3) = WINE_LanguageId;
1546             *(WORD*)(dataptr+5) = CodePage;
1547             break;
1548         case 0x06:
1549             dataptr[0] = 0x06;
1550             *(DWORD*)(dataptr+1) = MAKELONG(DOSMEM_CollateTable & 0xFFFF,DOSMEM_AllocSelector(DOSMEM_CollateTable>>16));
1551             CX_reg(context)         = 258;/*FIXME: size of table?*/
1552             break;
1553         default:
1554             INT_BARF( context, 0x21 );
1555             SET_CFLAG(context);
1556             break;
1557         }
1558         break;
1559     }
1560     case 0x66: /* GLOBAL CODE PAGE TABLE */
1561         switch (AL_reg(context))
1562         {
1563         case 0x01:
1564             DX_reg(context) = BX_reg(context) = CodePage;
1565             RESET_CFLAG(context);
1566             break;
1567         case 0x02:
1568             CodePage = BX_reg(context);
1569             RESET_CFLAG(context);
1570             break;
1571         }
1572         break;
1573
1574     case 0x67: /* SET HANDLE COUNT */
1575         SetHandleCount16( BX_reg(context) );
1576         if (DOS_ExtendedError)
1577         {
1578             AX_reg(context) = DOS_ExtendedError;
1579             SET_CFLAG(context);
1580         }
1581         break;
1582
1583     case 0x68: /* "FFLUSH" - COMMIT FILE */
1584     case 0x6a: /* COMMIT FILE */
1585         if (!FlushFileBuffers( BX_reg(context) ))
1586         {
1587             AX_reg(context) = DOS_ExtendedError;
1588             SET_CFLAG(context);
1589         }
1590         break;
1591
1592     case 0x69: /* DISK SERIAL NUMBER */
1593         switch (AL_reg(context))
1594         {
1595         case 0x00:
1596             if (!INT21_GetDiskSerialNumber(context))
1597             {
1598                 AX_reg(context) = DOS_ExtendedError;
1599                 SET_CFLAG(context);
1600             }
1601             else AX_reg(context) = 0;
1602             break;
1603         case 0x01:
1604             if (!INT21_SetDiskSerialNumber(context))
1605             {
1606                 AX_reg(context) = DOS_ExtendedError;
1607                 SET_CFLAG(context);
1608             }
1609             else AX_reg(context) = 1;
1610             break;
1611         }
1612         break;
1613
1614     case 0x6C: /* Extended Open/Create*/
1615         ExtendedOpenCreateFile(context);
1616         break;
1617
1618     case 0x71: /* MS-DOS 7 (Windows95) - LONG FILENAME FUNCTIONS */
1619         switch(AL_reg(context))
1620         {
1621         case 0x39:  /* Create directory */
1622             if (!CreateDirectory32A( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1623                                                      DX_reg(context) ), NULL))
1624             {
1625                 AX_reg(context) = DOS_ExtendedError;
1626                 SET_CFLAG(context);
1627             }
1628             break;
1629         case 0x3a:  /* Remove directory */
1630             if (!RemoveDirectory32A( PTR_SEG_OFF_TO_LIN( DS_reg(context),
1631                                                          DX_reg(context) )))
1632             {
1633                 AX_reg(context) = DOS_ExtendedError;
1634                 SET_CFLAG(context);
1635             }
1636             break;
1637         case 0x43:  /* Get/Set file attributes */
1638         switch (BL_reg(context))
1639         {
1640         case 0x00: /* Get file attributes */
1641             CX_reg(context) = (WORD)GetFileAttributes32A(
1642                                           PTR_SEG_OFF_TO_LIN(DS_reg(context),
1643                                                              DX_reg(context)));
1644             if (CX_reg(context) == 0xffff)
1645             {
1646                 AX_reg(context) = DOS_ExtendedError;
1647                 SET_CFLAG(context);
1648             }
1649             break;
1650         case 0x01:
1651             if (!SetFileAttributes32A( PTR_SEG_OFF_TO_LIN(DS_reg(context),
1652                                                           DX_reg(context)),
1653                                        CX_reg(context) ))
1654             {
1655                 AX_reg(context) = DOS_ExtendedError;
1656                 SET_CFLAG(context);
1657             }
1658             break;
1659         default:
1660           fprintf( stderr,
1661                    "Unimplemented int21 long file name function:\n");
1662           INT_BARF( context, 0x21 );
1663           SET_CFLAG(context);
1664           AL_reg(context) = 0;
1665           break;
1666         }
1667         break;
1668         case 0x47:  /* Get current directory */
1669           if (!INT21_GetCurrentDirectory(context))
1670             {
1671               AX_reg(context) = DOS_ExtendedError;
1672               SET_CFLAG(context);
1673             }
1674           else AX_reg(context) = 0x0100;
1675         /* intlist: many Microsoft products for Windows rely on this */
1676         break;
1677         case 0x4e:  /* Find first file */
1678             /* FIXME: use attributes in CX */
1679             if ((AX_reg(context) = FindFirstFile16(
1680                    PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
1681                    (WIN32_FIND_DATA32A *)PTR_SEG_OFF_TO_LIN(ES_reg(context),
1682                                                             DI_reg(context))))
1683                 == INVALID_HANDLE_VALUE16)
1684             {
1685                 AX_reg(context) = DOS_ExtendedError;
1686                 SET_CFLAG(context);
1687             }
1688             break;
1689         case 0x4f:  /* Find next file */
1690             if (!FindNextFile16( BX_reg(context),
1691                     (WIN32_FIND_DATA32A *)PTR_SEG_OFF_TO_LIN(ES_reg(context),
1692                                                              DI_reg(context))))
1693             {
1694                 AX_reg(context) = DOS_ExtendedError;
1695                 SET_CFLAG(context);
1696             }
1697             break;
1698         case 0xa1:  /* Find close */
1699             if (!FindClose16( BX_reg(context) ))
1700             {
1701                 AX_reg(context) = DOS_ExtendedError;
1702                 SET_CFLAG(context);
1703             }
1704             break;
1705         case 0xa0:
1706             break;
1707         case 0x60:
1708           switch(CL_reg(context))
1709             {
1710             case 0x02:  /*Get canonical long filename or path */
1711               if (!GetFullPathName32A
1712                   ( PTR_SEG_OFF_TO_LIN(DS_reg(context),
1713                                        SI_reg(context)), 128,
1714                     PTR_SEG_OFF_TO_LIN(ES_reg(context),
1715                                        DI_reg(context)),NULL))
1716                 {
1717                   AX_reg(context) = DOS_ExtendedError;
1718                   SET_CFLAG(context);
1719                 }
1720               else AX_reg(context) = 0;
1721               break;
1722             default:
1723               fprintf( stderr,
1724                        "Unimplemented int21 long file name function:\n");
1725               INT_BARF( context, 0x21 );
1726               SET_CFLAG(context);
1727               AL_reg(context) = 0;
1728               break;
1729             }
1730             break;
1731         case 0x6c:  /* Create or open file */
1732           /* translate Dos 7 action to Dos 6 action */
1733             ExtendedOpenCreateFile(context);
1734             break;
1735         case 0x3b:  /* Change directory */
1736         case 0x41:  /* Delete file */
1737         case 0x56:  /* Move (rename) file */
1738         default:
1739             fprintf( stderr, "Unimplemented int21 long file name function:\n");
1740             INT_BARF( context, 0x21 );
1741             SET_CFLAG(context);
1742             AL_reg(context) = 0;
1743             break;
1744         }
1745         break;
1746
1747     case 0x70: /* MS-DOS 7 (Windows95) - ??? (country-specific?)*/
1748     case 0x72: /* MS-DOS 7 (Windows95) - ??? */
1749     case 0x73: /* MS-DOS 7 (Windows95) - DRIVE LOCKING ??? */
1750         dprintf_int(stddeb,"int21: windows95 function AX %04x\n",
1751                     AX_reg(context));
1752         dprintf_int(stddeb, "        returning unimplemented\n");
1753         SET_CFLAG(context);
1754         AL_reg(context) = 0;
1755         break;
1756
1757     case 0xdc: /* CONNECTION SERVICES - GET CONNECTION NUMBER */
1758     case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */
1759         break;
1760
1761     default:
1762         INT_BARF( context, 0x21 );
1763         break;
1764     }
1765     dprintf_int( stddeb, "ret21: AX=%04x BX=%04x CX=%04x DX=%04x "
1766                  "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
1767                  AX_reg(context), BX_reg(context), CX_reg(context),
1768                  DX_reg(context), SI_reg(context), DI_reg(context),
1769                  (WORD)DS_reg(context), (WORD)ES_reg(context),
1770                  EFL_reg(context));
1771 }