msdos/int21.c

   1 /*
   2  * DOS interrupt 21h handler
   3  *
   4  * Copyright 1993, 1994 Erik Bos
   5  * Copyright 1996 Alexandre Julliard
   6  * Copyright 1997 Andreas Mohr
   7  * Copyright 1998 Uwe Bonnes
   8  * Copyright 1998, 1999 Ove Kaaven
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <time.h>
  29 #include <fcntl.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #ifdef HAVE_SYS_FILE_H
  33 # include <sys/file.h>
  34 #endif
  35 #include <string.h>
  36 #ifdef HAVE_SYS_TIME_H
  37 # include <sys/time.h>
  38 #endif
  39 #include <sys/types.h>
  40 #ifdef HAVE_UNISTD_H
  41 # include <unistd.h>
  42 #endif
  43 #ifdef HAVE_UTIME_H
  44 # include <utime.h>
  45 #endif
  46 #include <ctype.h>
  47 #include "windef.h"
  48 #include "winbase.h"
  49 #include "winternl.h"
  50 #include "wingdi.h"
  51 #include "winuser.h" /* SW_NORMAL */
  52 #include "wine/winbase16.h"
  53 #include "winerror.h"
  54 #include "drive.h"
  55 #include "file.h"
  56 #include "callback.h"
  57 #include "msdos.h"
  58 #include "miscemu.h"
  59 #include "task.h"
  60 #include "wine/unicode.h"
  61 #include "wine/debug.h"
  62
  63 WINE_DEFAULT_DEBUG_CHANNEL(int21);
  64 #if defined(__svr4__) || defined(_SCO_DS)
  65 /* SVR4 DOESNT do locking the same way must implement properly */
  66 #define LOCK_EX 0
  67 #define LOCK_SH  1
  68 #define LOCK_NB  8
  69 #endif
  70
  71
  72 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
  73
  74 /* Define the drive parameter block, as used by int21/1F
  75  * and int21/32.  This table can be accessed through the
  76  * global 'dpb' pointer, which points into the local dos
  77  * heap.
  78  */
  79 struct DPB
  80 {
  81     BYTE drive_num;         /* 0=A, etc. */
  82     BYTE unit_num;          /* Drive's unit number (?) */
  83     WORD sector_size;       /* Sector size in bytes */
  84     BYTE high_sector;       /* Highest sector in a cluster */
  85     BYTE shift;             /* Shift count (?) */
  86     WORD reserved;          /* Number of reserved sectors at start */
  87     BYTE num_FAT;           /* Number of FATs */
  88     WORD dir_entries;       /* Number of root dir entries */
  89     WORD first_data;        /* First data sector */
  90     WORD high_cluster;      /* Highest cluster number */
  91     WORD sectors_in_FAT;    /* Number of sectors per FAT */
  92     WORD start_dir;         /* Starting sector of first dir */
  93     DWORD driver_head;      /* Address of device driver header (?) */
  94     BYTE media_ID;          /* Media ID */
  95     BYTE access_flag;       /* Prev. accessed flag (0=yes,0xFF=no) */
  96     DWORD next;             /* Pointer to next DPB in list */
  97     WORD free_search;       /* Free cluster search start */
  98     WORD free_clusters;     /* Number of free clusters (0xFFFF=unknown) */
  99 };
 100
 101 struct EDPB                     /* FAT32 extended Drive Parameter Block */
 102 {                               /* from Ralf Brown's Interrupt List */
 103         struct DPB dpb;         /* first 24 bytes = original DPB */
 104
 105         BYTE edpb_flags;        /* undocumented/unknown flags */
 106         DWORD next_edpb;        /* pointer to next EDPB */
 107         WORD free_cluster;      /* cluster to start search for free space on write, typically
 108                                    the last cluster allocated */
 109         WORD clusters_free;     /* number of free clusters on drive or FFFF = unknown */
 110         WORD clusters_free_hi;  /* hiword of clusters_free */
 111         WORD mirroring_flags;   /* mirroring flags: bit 7 set = do not mirror active FAT */
 112                                 /* bits 0-3 = 0-based number of the active FAT */
 113         WORD info_sector;       /* sector number of file system info sector, or FFFF for none */
 114         WORD spare_boot_sector; /* sector number of backup boot sector, or FFFF for none */
 115         DWORD first_cluster;    /* sector number of the first cluster */
 116         DWORD max_cluster;      /* sector number of the last cluster */
 117         DWORD fat_clusters;     /* number of clusters occupied by FAT */
 118         DWORD root_cluster;     /* cluster number of start of root directory */
 119         DWORD free_cluster2;    /* same as free_cluster: cluster at which to start
 120                                    search for free space when writing */
 121
 122 };
 123
 124 DWORD dpbsegptr;
 125
 126 struct DosHeap {
 127         BYTE mediaID;
 128         BYTE biosdate[8];
 129         struct DPB dpb;
 130 };
 131 static struct DosHeap *heap;
 132 static WORD DosHeapHandle;
 133
 134 extern char TempDirectory[];
 135
 136 static BOOL INT21_CreateHeap(void)
 137 {
 138     if (!(DosHeapHandle = GlobalAlloc16(GMEM_FIXED,sizeof(struct DosHeap))))
 139     {
 140         WARN("Out of memory\n");
 141         return FALSE;
 142     }
 143     heap = (struct DosHeap *) GlobalLock16(DosHeapHandle);
 144     dpbsegptr = MAKESEGPTR(DosHeapHandle,(int)&heap->dpb-(int)heap);
 145     strcpy(heap->biosdate, "01/01/80");
 146     return TRUE;
 147 }
 148
 149 static BYTE *GetCurrentDTA( CONTEXT86 *context )
 150 {
 151     TDB *pTask = TASK_GetCurrent();
 152
 153     /* FIXME: This assumes DTA was set correctly! */
 154     return (BYTE *)CTX_SEG_OFF_TO_LIN( context, SELECTOROF(pTask->dta),
 155                                                 (DWORD)OFFSETOF(pTask->dta) );
 156 }
 157
 158
 159 void CreateBPB(int drive, BYTE *data, BOOL16 limited)
 160 /* limited == TRUE is used with INT 0x21/0x440d */
 161 {
 162         if (drive > 1) {
 163                 setword(data, 512);
 164                 data[2] = 2;
 165                 setword(&data[3], 0);
 166                 data[5] = 2;
 167                 setword(&data[6], 240);
 168                 setword(&data[8], 64000);
 169                 data[0x0a] = 0xf8;
 170                 setword(&data[0x0b], 40);
 171                 setword(&data[0x0d], 56);
 172                 setword(&data[0x0f], 2);
 173                 setword(&data[0x11], 0);
 174                 if (!limited) {
 175                     setword(&data[0x1f], 800);
 176                     data[0x21] = 5;
 177                     setword(&data[0x22], 1);
 178                 }
 179         } else { /* 1.44mb */
 180                 setword(data, 512);
 181                 data[2] = 2;
 182                 setword(&data[3], 0);
 183                 data[5] = 2;
 184                 setword(&data[6], 240);
 185                 setword(&data[8], 2880);
 186                 data[0x0a] = 0xf8;
 187                 setword(&data[0x0b], 6);
 188                 setword(&data[0x0d], 18);
 189                 setword(&data[0x0f], 2);
 190                 setword(&data[0x11], 0);
 191                 if (!limited) {
 192                     setword(&data[0x1f], 80);
 193                     data[0x21] = 7;
 194                     setword(&data[0x22], 2);
 195                 }
 196         }
 197 }
 198
 199 static int INT21_GetFreeDiskSpace( CONTEXT86 *context )
 200 {
 201     DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
 202     char root[] = "A:\\";
 203
 204     *root += DOS_GET_DRIVE( DL_reg(context) );
 205     if (!GetDiskFreeSpaceA( root, &cluster_sectors, &sector_bytes,
 206                               &free_clusters, &total_clusters )) return 0;
 207     SET_AX( context, cluster_sectors );
 208     SET_BX( context, free_clusters );
 209     SET_CX( context, sector_bytes );
 210     SET_DX( context, total_clusters );
 211     return 1;
 212 }
 213
 214 static int INT21_GetDriveAllocInfo( CONTEXT86 *context )
 215 {
 216     if (!INT21_GetFreeDiskSpace( context )) return 0;
 217     if (!heap && !INT21_CreateHeap()) return 0;
 218     heap->mediaID = 0xf0;
 219     context->SegDs = DosHeapHandle;
 220     SET_BX( context, (int)&heap->mediaID - (int)heap );
 221     return 1;
 222 }
 223
 224 static int FillInDrivePB( int drive )
 225 {
 226         if(!DRIVE_IsValid(drive))
 227         {
 228             SetLastError( ERROR_INVALID_DRIVE );
 229                         return 0;
 230         }
 231         else if (heap || INT21_CreateHeap())
 232         {
 233                 /* FIXME: I have no idea what a lot of this information should
 234                  * say or whether it even really matters since we're not allowing
 235                  * direct block access.  However, some programs seem to depend on
 236                  * getting at least _something_ back from here.  The 'next' pointer
 237                  * does worry me, though.  Should we have a complete table of
 238                  * separate DPBs per drive?  Probably, but I'm lazy. :-)  -CH
 239                  */
 240                 heap->dpb.drive_num = heap->dpb.unit_num = drive; /*The same?*/
 241                 heap->dpb.sector_size = 512;
 242                 heap->dpb.high_sector = 1;
 243                 heap->dpb.shift = drive < 2 ? 0 : 6; /*6 for HD, 0 for floppy*/
 244                 heap->dpb.reserved = 0;
 245                 heap->dpb.num_FAT = 1;
 246                 heap->dpb.dir_entries = 2;
 247                 heap->dpb.first_data = 2;
 248                 heap->dpb.high_cluster = 64000;
 249                 heap->dpb.sectors_in_FAT = 1;
 250                 heap->dpb.start_dir = 1;
 251                 heap->dpb.driver_head = 0;
 252                 heap->dpb.media_ID = (drive > 1) ? 0xF8 : 0xF0;
 253                 heap->dpb.access_flag = 0;
 254                 heap->dpb.next = 0;
 255                 heap->dpb.free_search = 0;
 256                 heap->dpb.free_clusters = 0xFFFF;    /* unknown */
 257                                 return 1;
 258                 }
 259
 260                 return 0;
 261 }
 262
 263 static void GetDrivePB( CONTEXT86 *context, int drive )
 264 {
 265         if (FillInDrivePB( drive ))
 266         {
 267                 SET_AL( context, 0x00 );
 268                 context->SegDs = SELECTOROF(dpbsegptr);
 269                 SET_BX( context, OFFSETOF(dpbsegptr) );
 270         }
 271         else
 272         {
 273         SET_AX( context, 0x00ff );
 274         }
 275 }
 276
 277
 278 static void ioctlGetDeviceInfo( CONTEXT86 *context )
 279 {
 280     int curr_drive;
 281     const DOS_DEVICE *dev;
 282
 283     TRACE("(%d)\n", BX_reg(context));
 284
 285     RESET_CFLAG(context);
 286
 287     /* DOS device ? */
 288     if ((dev = DOSFS_GetDeviceByHandle( DosFileHandleToWin32Handle(BX_reg(context)) )))
 289     {
 290         SET_DX( context, dev->flags );
 291         return;
 292     }
 293
 294     /* it seems to be a file */
 295     curr_drive = DRIVE_GetCurrentDrive();
 296     SET_DX( context, 0x0140 + curr_drive + ((curr_drive > 1) ? 0x0800 : 0) );
 297     /* no floppy */
 298     /* bits 0-5 are current drive
 299      * bit 6 - file has NOT been written..FIXME: correct?
 300      * bit 8 - generate int24 if no diskspace on write/ read past end of file
 301      * bit 11 - media not removable
 302      * bit 14 - don't set file date/time on closing
 303      * bit 15 - file is remote
 304      */
 305 }
 306
 307 static BOOL ioctlGenericBlkDevReq( CONTEXT86 *context )
 308 {
 309         BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 310         int drive = DOS_GET_DRIVE( BL_reg(context) );
 311
 312         if (!DRIVE_IsValid(drive))
 313         {
 314             SetLastError( ERROR_FILE_NOT_FOUND );
 315             return TRUE;
 316         }
 317
 318         if (CH_reg(context) != 0x08)
 319         {
 320             INT_BARF( context, 0x21 );
 321             return FALSE;
 322         }
 323
 324         switch (CL_reg(context))
 325         {
 326                 case 0x4a: /* lock logical volume */
 327                         TRACE("lock logical volume (%d) level %d mode %d\n",drive,BH_reg(context),DX_reg(context));
 328                         break;
 329
 330                 case 0x60: /* get device parameters */
 331                            /* used by w4wgrp's winfile */
 332                         memset(dataptr, 0, 0x20); /* DOS 6.22 uses 0x20 bytes */
 333                         dataptr[0] = 0x04;
 334                         dataptr[6] = 0; /* media type */
 335                         if (drive > 1)
 336                         {
 337                                 dataptr[1] = 0x05; /* fixed disk */
 338                                 setword(&dataptr[2], 0x01); /* non removable */
 339                                 setword(&dataptr[4], 0x300); /* # of cylinders */
 340                         }
 341                         else
 342                         {
 343                                 dataptr[1] = 0x07; /* block dev, floppy */
 344                                 setword(&dataptr[2], 0x02); /* removable */
 345                                 setword(&dataptr[4], 80); /* # of cylinders */
 346                         }
 347                         CreateBPB(drive, &dataptr[7], TRUE);
 348                         RESET_CFLAG(context);
 349                         break;
 350
 351                 case 0x41: /* write logical device track */
 352                 case 0x61: /* read logical device track */
 353                         {
 354                                 BYTE drive = BL_reg(context) ?
 355                                                 BL_reg(context) : DRIVE_GetCurrentDrive();
 356                                 WORD head   = *(WORD *)dataptr+1;
 357                                 WORD cyl    = *(WORD *)dataptr+3;
 358                                 WORD sect   = *(WORD *)dataptr+5;
 359                                 WORD nrsect = *(WORD *)dataptr+7;
 360                                 BYTE *data  =  (BYTE *)dataptr+9;
 361                                 int (*raw_func)(BYTE, DWORD, DWORD, BYTE *, BOOL);
 362
 363                                 raw_func = (CL_reg(context) == 0x41) ?
 364                                                                 DRIVE_RawWrite : DRIVE_RawRead;
 365
 366                                 if (raw_func(drive, head*cyl*sect, nrsect, data, FALSE))
 367                                         RESET_CFLAG(context);
 368                                 else
 369                                 {
 370                                         SET_AX( context, 0x1e ); /* read fault */
 371                                         SET_CFLAG(context);
 372                                 }
 373                         }
 374                         break;
 375                 case 0x66:/*  get disk serial number */
 376                         {
 377                                 char    label[12],fsname[9],path[4];
 378                                 DWORD   serial;
 379
 380                                 strcpy(path,"x:\\");path[0]=drive+'A';
 381                                 GetVolumeInformationA(
 382                                         path,label,12,&serial,NULL,NULL,fsname,9
 383                                 );
 384                                 *(WORD*)dataptr         = 0;
 385                                 memcpy(dataptr+2,&serial,4);
 386                                 memcpy(dataptr+6,label  ,11);
 387                                 memcpy(dataptr+17,fsname,8);
 388                         }
 389                         break;
 390
 391                 case 0x6a:
 392                         TRACE("logical volume %d unlocked.\n",drive);
 393                         break;
 394
 395                 case 0x6f:
 396                         memset(dataptr+1, '\0', dataptr[0]-1);
 397                         dataptr[1] = dataptr[0];
 398                         dataptr[2] = 0x07; /* protected mode driver; no eject; no notification */
 399                         dataptr[3] = 0xFF; /* no physical drive */
 400                         break;
 401
 402                 case 0x72:
 403                         /* Trail on error implementation */
 404                         SET_AX( context, GetDriveType16(BL_reg(context)) == DRIVE_UNKNOWN ? 0x0f : 0x01 );
 405                         SET_CFLAG(context);     /* Seems to be set all the time */
 406                         break;
 407
 408                 default:
 409                         INT_BARF( context, 0x21 );
 410         }
 411         return FALSE;
 412 }
 413
 414 static void INT21_ParseFileNameIntoFCB( CONTEXT86 *context )
 415 {
 416     char *filename =
 417         CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Esi );
 418     char *fcb =
 419         CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Edi );
 420     char *s;
 421     WCHAR *buffer;
 422     WCHAR fcbW[12];
 423     INT buffer_len, len;
 424
 425     SET_AL( context, 0xff ); /* failed */
 426
 427     TRACE("filename: '%s'\n", filename);
 428
 429     s = filename;
 430     len = 0;
 431     while (*s)
 432     {
 433         if ((*s != ' ') && (*s != '\r') && (*s != '\n'))
 434         {
 435             s++;
 436             len++;
 437         }
 438         else
 439             break;
 440     }
 441
 442     buffer_len = MultiByteToWideChar(CP_OEMCP, 0, filename, len, NULL, 0);
 443     buffer = HeapAlloc( GetProcessHeap(), 0, (buffer_len + 1) * sizeof(WCHAR));
 444     len = MultiByteToWideChar(CP_OEMCP, 0, filename, len, buffer, buffer_len);
 445     buffer[len] = 0;
 446     DOSFS_ToDosFCBFormat(buffer, fcbW);
 447     HeapFree(GetProcessHeap(), 0, buffer);
 448     WideCharToMultiByte(CP_OEMCP, 0, fcbW, 12, fcb + 1, 12, NULL, NULL);
 449     *fcb = 0;
 450     TRACE("FCB: '%s'\n", fcb + 1);
 451
 452     SET_AL( context, ((strchr(filename, '*')) || (strchr(filename, '$'))) != 0 );
 453
 454     /* point DS:SI to first unparsed character */
 455     SET_SI( context, context->Esi + (int)s - (int)filename );
 456 }
 457
 458
 459 /* Many calls translate a drive argument like this:
 460    drive number (00h = default, 01h = A:, etc)
 461    */
 462 static char drivestring[]="default";
 463
 464 char *INT21_DriveName(int drive)
 465 {
 466
 467     if(drive >0)
 468       {
 469         drivestring[0]= (unsigned char)drive + '@';
 470         drivestring[1]=':';
 471         drivestring[2]=0;
 472       }
 473     return drivestring;
 474 }
 475 static BOOL INT21_CreateFile( CONTEXT86 *context )
 476 {
 477     SET_AX( context, _lcreat16( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
 478                                                    context->Edx ), CX_reg(context) ) );
 479     return (AX_reg(context) == (WORD)HFILE_ERROR16);
 480 }
 481
 482 static HFILE16 _lcreat16_uniq( LPCSTR path, INT attr )
 483 {
 484     /* Mask off all flags not explicitly allowed by the doc */
 485     attr &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
 486     return Win32HandleToDosFileHandle( CreateFileA( path, GENERIC_READ | GENERIC_WRITE,
 487                                              FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
 488                                              CREATE_NEW, attr, 0 ));
 489 }
 490
 491 static void OpenExistingFile( CONTEXT86 *context )
 492 {
 493     SET_AX( context, _lopen16( CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx),
 494                                AL_reg(context) ));
 495     if (AX_reg(context) == (WORD)HFILE_ERROR16)
 496     {
 497         SET_AX( context, GetLastError() );
 498         SET_CFLAG(context);
 499     }
 500 }
 501
 502 static BOOL INT21_ExtendedOpenCreateFile(CONTEXT86 *context )
 503 {
 504   BOOL bExtendedError = FALSE;
 505   BYTE action = DL_reg(context);
 506
 507   /* Shuffle arguments to call OpenExistingFile */
 508   SET_AL( context, BL_reg(context) );
 509   SET_DX( context, SI_reg(context) );
 510   /* BX,CX and DX should be preserved */
 511   OpenExistingFile(context);
 512
 513   if ((context->EFlags & 0x0001) == 0) /* File exists */
 514   {
 515       UINT16    uReturnCX = 0;
 516
 517       /* Now decide what do do */
 518
 519       if ((action & 0x07) == 0)
 520       {
 521           _lclose16( AX_reg(context) );
 522           SET_AX( context, 0x0050 );    /*File exists*/
 523           SET_CFLAG(context);
 524           WARN("extended open/create: failed because file exists \n");
 525       }
 526       else if ((action & 0x07) == 2)
 527       {
 528         /* Truncate it, but first check if opened for write */
 529         if ((BL_reg(context) & 0x0007)== 0)
 530         {
 531             _lclose16( AX_reg(context) );
 532             WARN("extended open/create: failed, trunc on ro file\n");
 533             SET_AX( context, 0x000C );  /*Access code invalid*/
 534             SET_CFLAG(context);
 535         }
 536         else
 537         {
 538                 TRACE("extended open/create: Closing before truncate\n");
 539                 if (_lclose16( AX_reg(context) ))
 540                 {
 541                    WARN("extended open/create: close before trunc failed\n");
 542                    SET_AX( context, 0x0019 );   /*Seek Error*/
 543                    SET_CX( context, 0 );
 544                    SET_CFLAG(context);
 545                 }
 546                 /* Shuffle arguments to call CreateFile */
 547
 548                 TRACE("extended open/create: Truncating\n");
 549                 SET_AL( context, BL_reg(context) );
 550                 /* CX is still the same */
 551                 SET_DX( context, SI_reg(context) );
 552                 bExtendedError = INT21_CreateFile(context);
 553
 554                 if (context->EFlags & 0x0001)   /*no file open, flags set */
 555                 {
 556                     WARN("extended open/create: trunc failed\n");
 557                     return bExtendedError;
 558                 }
 559                 uReturnCX = 0x3;
 560         }
 561       }
 562       else uReturnCX = 0x1;
 563
 564       SET_CX( context, uReturnCX );
 565   }
 566   else /* file does not exist */
 567   {
 568       RESET_CFLAG(context); /* was set by OpenExistingFile(context) */
 569       if ((action & 0xF0)== 0)
 570       {
 571         SET_CX( context, 0 );
 572         SET_CFLAG(context);
 573         WARN("extended open/create: failed, file dosen't exist\n");
 574       }
 575       else
 576       {
 577         /* Shuffle arguments to call CreateFile */
 578         TRACE("extended open/create: Creating\n");
 579         SET_AL( context, BL_reg(context) );
 580         /* CX should still be the same */
 581         SET_DX( context, SI_reg(context) );
 582         bExtendedError = INT21_CreateFile(context);
 583         if (context->EFlags & 0x0001)  /*no file open, flags set */
 584         {
 585             WARN("extended open/create: create failed\n");
 586             return bExtendedError;
 587         }
 588         SET_CX( context, 2 );
 589       }
 590   }
 591
 592   return bExtendedError;
 593 }
 594
 595
 596 static BOOL INT21_ChangeDir( CONTEXT86 *context )
 597 {
 598     int drive;
 599     char *dirname = CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx);
 600     WCHAR dirnameW[MAX_PATH];
 601
 602     TRACE("changedir %s\n", dirname);
 603     if (dirname[0] && (dirname[1] == ':'))
 604     {
 605         drive = toupper(dirname[0]) - 'A';
 606         dirname += 2;
 607     }
 608     else drive = DRIVE_GetCurrentDrive();
 609     MultiByteToWideChar(CP_OEMCP, 0, dirname, -1, dirnameW, MAX_PATH);
 610     return DRIVE_Chdir( drive, dirnameW );
 611 }
 612
 613
 614 static int INT21_FindFirst( CONTEXT86 *context )
 615 {
 616     char *p;
 617     const char *path;
 618     DOS_FULL_NAME full_name;
 619     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA(context);
 620     WCHAR pathW[MAX_PATH];
 621     WCHAR maskW[12];
 622
 623     path = (const char *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 624     MultiByteToWideChar(CP_OEMCP, 0, path, -1, pathW, MAX_PATH);
 625
 626     dta->unixPath = NULL;
 627     if (!DOSFS_GetFullName( pathW, FALSE, &full_name ))
 628     {
 629         SET_AX( context, GetLastError() );
 630         SET_CFLAG(context);
 631         return 0;
 632     }
 633     dta->unixPath = HeapAlloc( GetProcessHeap(), 0, strlen(full_name.long_name)+1 );
 634     strcpy( dta->unixPath, full_name.long_name );
 635     p = strrchr( dta->unixPath, '/' );
 636     *p = '\0';
 637
 638     MultiByteToWideChar(CP_OEMCP, 0, p + 1, -1, pathW, MAX_PATH);
 639
 640     /* Note: terminating NULL in dta->mask overwrites dta->search_attr
 641      *       (doesn't matter as it is set below anyway)
 642      */
 643     if (!DOSFS_ToDosFCBFormat( pathW, maskW ))
 644     {
 645         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 646         dta->unixPath = NULL;
 647         SetLastError( ERROR_FILE_NOT_FOUND );
 648         SET_AX( context, ERROR_FILE_NOT_FOUND );
 649         SET_CFLAG(context);
 650         return 0;
 651     }
 652     WideCharToMultiByte(CP_OEMCP, 0, maskW, 12, dta->mask, sizeof(dta->mask), NULL, NULL);
 653     dta->drive = (path[0] && (path[1] == ':')) ? toupper(path[0]) - 'A'
 654                                                : DRIVE_GetCurrentDrive();
 655     dta->count = 0;
 656     dta->search_attr = CL_reg(context);
 657     return 1;
 658 }
 659
 660
 661 static int INT21_FindNext( CONTEXT86 *context )
 662 {
 663     FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA(context);
 664     WIN32_FIND_DATAA entry;
 665     int count;
 666
 667     if (!dta->unixPath) return 0;
 668     if (!(count = DOSFS_FindNext( dta->unixPath, dta->mask, NULL, dta->drive,
 669                                   dta->search_attr, dta->count, &entry )))
 670     {
 671         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 672         dta->unixPath = NULL;
 673         return 0;
 674     }
 675     if ((int)dta->count + count > 0xffff)
 676     {
 677         WARN("Too many directory entries in %s\n", dta->unixPath );
 678         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 679         dta->unixPath = NULL;
 680         return 0;
 681     }
 682     dta->count += count;
 683     dta->fileattr = entry.dwFileAttributes;
 684     dta->filesize = entry.nFileSizeLow;
 685     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 686                            &dta->filedate, &dta->filetime );
 687     strcpy( dta->filename, entry.cAlternateFileName );
 688     if (!memchr(dta->mask,'?',11)) {
 689         /* wildcardless search, release resources in case no findnext will
 690          * be issued, and as a workaround in case file creation messes up
 691          * findnext, as sometimes happens with pkunzip */
 692         HeapFree( GetProcessHeap(), 0, dta->unixPath );
 693         dta->unixPath = NULL;
 694     }
 695     return 1;
 696 }
 697
 698
 699 static BOOL INT21_CreateTempFile( CONTEXT86 *context )
 700 {
 701     static int counter = 0;
 702     char *name = CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx );
 703     char *p = name + strlen(name);
 704
 705     /* despite what Ralf Brown says, some programs seem to call without
 706      * ending backslash (DOS accepts that, so we accept it too) */
 707     if ((p == name) || (p[-1] != '\\')) *p++ = '\\';
 708
 709     for (;;)
 710     {
 711         sprintf( p, "wine%04x.%03d", (int)getpid(), counter );
 712         counter = (counter + 1) % 1000;
 713
 714         SET_AX( context, _lcreat16_uniq( name, 0 ) );
 715         if (AX_reg(context) != HFILE_ERROR16)
 716         {
 717             TRACE("created %s\n", name );
 718             return TRUE;
 719         }
 720         if (GetLastError() != ERROR_FILE_EXISTS) return FALSE;
 721     }
 722 }
 723
 724
 725 static BOOL INT21_GetCurrentDirectory( CONTEXT86 *context )
 726 {
 727     int drive = DOS_GET_DRIVE( DL_reg(context) );
 728     char *ptr = (char *)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Esi );
 729
 730     if (!DRIVE_IsValid(drive))
 731     {
 732         SetLastError( ERROR_INVALID_DRIVE );
 733         return FALSE;
 734     }
 735     WideCharToMultiByte(CP_OEMCP, 0, DRIVE_GetDosCwd(drive), -1, ptr, 64, NULL, NULL);
 736     ptr[63] = 0; /* ensure 0 termination */
 737     SET_AX( context, 0x0100 );                       /* success return code */
 738     return TRUE;
 739 }
 740
 741
 742 static int INT21_GetDiskSerialNumber( CONTEXT86 *context )
 743 {
 744     BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 745     int drive = DOS_GET_DRIVE( BL_reg(context) );
 746
 747     if (!DRIVE_IsValid(drive))
 748     {
 749         SetLastError( ERROR_INVALID_DRIVE );
 750         return 0;
 751     }
 752
 753     *(WORD *)dataptr = 0;
 754     *(DWORD *)(dataptr + 2) = DRIVE_GetSerialNumber( drive );
 755     memcpy( dataptr + 6, DRIVE_GetLabel( drive ), 11 );
 756     strncpy(dataptr + 0x11, "FAT16   ", 8);
 757     return 1;
 758 }
 759
 760
 761 static int INT21_SetDiskSerialNumber( CONTEXT86 *context )
 762 {
 763     BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 764     int drive = DOS_GET_DRIVE( BL_reg(context) );
 765
 766     if (!DRIVE_IsValid(drive))
 767     {
 768         SetLastError( ERROR_INVALID_DRIVE );
 769         return 0;
 770     }
 771
 772     DRIVE_SetSerialNumber( drive, *(DWORD *)(dataptr + 2) );
 773     return 1;
 774 }
 775
 776
 777 /* microsoft's programmers should be shot for using CP/M style int21
 778    calls in Windows for Workgroup's winfile.exe */
 779
 780 static int INT21_FindFirstFCB( CONTEXT86 *context )
 781 {
 782     BYTE *fcb = (BYTE *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 783     FINDFILE_FCB *pFCB;
 784     LPCSTR root, cwd;
 785     int drive;
 786
 787     if (*fcb == 0xff) pFCB = (FINDFILE_FCB *)(fcb + 7);
 788     else pFCB = (FINDFILE_FCB *)fcb;
 789     drive = DOS_GET_DRIVE( pFCB->drive );
 790     if (!DRIVE_IsValid( drive )) return 0;
 791     root = DRIVE_GetRoot( drive );
 792     cwd  = DRIVE_GetUnixCwd( drive );
 793     pFCB->unixPath = HeapAlloc( GetProcessHeap(), 0,
 794                                 strlen(root)+strlen(cwd)+2 );
 795     if (!pFCB->unixPath) return 0;
 796     strcpy( pFCB->unixPath, root );
 797     strcat( pFCB->unixPath, "/" );
 798     strcat( pFCB->unixPath, cwd );
 799     pFCB->count = 0;
 800     return 1;
 801 }
 802
 803
 804 static int INT21_FindNextFCB( CONTEXT86 *context )
 805 {
 806     BYTE *fcb = (BYTE *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 807     FINDFILE_FCB *pFCB;
 808     DOS_DIRENTRY_LAYOUT *pResult = (DOS_DIRENTRY_LAYOUT *)GetCurrentDTA(context);
 809     WIN32_FIND_DATAA entry;
 810     BYTE attr;
 811     int count;
 812
 813     if (*fcb == 0xff) /* extended FCB ? */
 814     {
 815         attr = fcb[6];
 816         pFCB = (FINDFILE_FCB *)(fcb + 7);
 817     }
 818     else
 819     {
 820         attr = 0;
 821         pFCB = (FINDFILE_FCB *)fcb;
 822     }
 823
 824     if (!pFCB->unixPath) return 0;
 825     if (!(count = DOSFS_FindNext( pFCB->unixPath, pFCB->filename, NULL,
 826                                   DOS_GET_DRIVE( pFCB->drive ), attr,
 827                                   pFCB->count, &entry )))
 828     {
 829         HeapFree( GetProcessHeap(), 0, pFCB->unixPath );
 830         pFCB->unixPath = NULL;
 831         return 0;
 832     }
 833     pFCB->count += count;
 834
 835     if (*fcb == 0xff) { /* place extended FCB header before pResult if called with extended FCB */
 836         *(BYTE *)pResult = 0xff;
 837         (BYTE *)pResult +=6; /* leave reserved field behind */
 838         *(BYTE *)pResult = entry.dwFileAttributes;
 839         ((BYTE *)pResult)++;
 840     }
 841     *(BYTE *)pResult = DOS_GET_DRIVE( pFCB->drive ); /* DOS_DIRENTRY_LAYOUT after current drive number */
 842     ((BYTE *)pResult)++;
 843     pResult->fileattr = entry.dwFileAttributes;
 844     pResult->cluster  = 0;  /* what else? */
 845     pResult->filesize = entry.nFileSizeLow;
 846     memset( pResult->reserved, 0, sizeof(pResult->reserved) );
 847     FileTimeToDosDateTime( &entry.ftLastWriteTime,
 848                            &pResult->filedate, &pResult->filetime );
 849
 850     /* Convert file name to FCB format */
 851
 852     memset( pResult->filename, ' ', sizeof(pResult->filename) );
 853     if (!strcmp( entry.cAlternateFileName, "." )) pResult->filename[0] = '.';
 854     else if (!strcmp( entry.cAlternateFileName, ".." ))
 855         pResult->filename[0] = pResult->filename[1] = '.';
 856     else
 857     {
 858         char *p = strrchr( entry.cAlternateFileName, '.' );
 859         if (p && p[1] && (p != entry.cAlternateFileName))
 860         {
 861             memcpy( pResult->filename, entry.cAlternateFileName,
 862                     min( (p - entry.cAlternateFileName), 8 ) );
 863             memcpy( pResult->filename + 8, p + 1, min( strlen(p), 3 ) );
 864         }
 865         else
 866             memcpy( pResult->filename, entry.cAlternateFileName,
 867                     min( strlen(entry.cAlternateFileName), 8 ) );
 868     }
 869     return 1;
 870 }
 871
 872
 873 static BOOL
 874 INT21_networkfunc (CONTEXT86 *context)
 875 {
 876      switch (AL_reg(context)) {
 877      case 0x00: /* Get machine name. */
 878      {
 879           char *dst = CTX_SEG_OFF_TO_LIN (context,context->SegDs,context->Edx);
 880           TRACE("getting machine name to %p\n", dst);
 881           if (gethostname (dst, 15))
 882           {
 883                WARN("failed!\n");
 884                SetLastError( ER_NoNetwork );
 885                return TRUE;
 886           } else {
 887                int len = strlen (dst);
 888                while (len < 15)
 889                     dst[len++] = ' ';
 890                dst[15] = 0;
 891                SET_CH( context, 1 ); /* Valid */
 892                SET_CL( context, 1 ); /* NETbios number??? */
 893                TRACE("returning %s\n", debugstr_an (dst, 16));
 894                return FALSE;
 895           }
 896      }
 897
 898      default:
 899           SetLastError( ER_NoNetwork );
 900           return TRUE;
 901      }
 902 }
 903
 904
 905 /***********************************************************************
 906  *           INT_Int21Handler
 907  */
 908 void WINAPI INT_Int21Handler( CONTEXT86 *context )
 909 {
 910     BOOL        bSetDOSExtendedError = FALSE;
 911
 912     switch(AH_reg(context))
 913     {
 914     case 0x0e: /* SELECT DEFAULT DRIVE */
 915         TRACE("SELECT DEFAULT DRIVE %d\n", DL_reg(context));
 916         DRIVE_SetCurrentDrive( DL_reg(context) );
 917         SET_AL( context, MAX_DOS_DRIVES );
 918         break;
 919
 920     case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
 921         TRACE("FIND FIRST MATCHING FILE USING FCB %p\n",
 922               CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx));
 923         if (!INT21_FindFirstFCB(context))
 924         {
 925             SET_AL( context, 0xff );
 926             break;
 927         }
 928         /* else fall through */
 929
 930     case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
 931         SET_AL( context, INT21_FindNextFCB(context) ? 0x00 : 0xff );
 932         break;
 933
 934     case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
 935         SET_DL( context, 0 );
 936         if (!INT21_GetDriveAllocInfo(context)) SET_AX( context, 0xffff );
 937         break;
 938
 939     case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
 940         if (!INT21_GetDriveAllocInfo(context)) SET_AX( context, 0xffff );
 941         break;
 942
 943     case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
 944         GetDrivePB(context, DRIVE_GetCurrentDrive());
 945         break;
 946
 947     case 0x29: /* PARSE FILENAME INTO FCB */
 948         INT21_ParseFileNameIntoFCB(context);
 949         break;
 950
 951     case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
 952         TRACE("GET DOS DRIVE PARAMETER BLOCK FOR DRIVE %s\n",
 953               INT21_DriveName( DL_reg(context)));
 954         GetDrivePB(context, DOS_GET_DRIVE( DL_reg(context) ) );
 955         break;
 956
 957     case 0x36: /* GET FREE DISK SPACE */
 958         TRACE("GET FREE DISK SPACE FOR DRIVE %s\n",
 959               INT21_DriveName( DL_reg(context)));
 960         if (!INT21_GetFreeDiskSpace(context)) SET_AX( context, 0xffff );
 961         break;
 962
 963     case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
 964         TRACE("CHDIR %s\n",
 965               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
 966         bSetDOSExtendedError = !INT21_ChangeDir(context);
 967         break;
 968
 969     case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
 970         TRACE("CREAT flag 0x%02x %s\n",CX_reg(context),
 971               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
 972         bSetDOSExtendedError = INT21_CreateFile( context );
 973         break;
 974
 975     case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
 976         TRACE("OPEN mode 0x%02x %s\n",AL_reg(context),
 977               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
 978         OpenExistingFile(context);
 979         break;
 980
 981     case 0x44: /* IOCTL */
 982         switch (AL_reg(context))
 983         {
 984         case 0x00:
 985             ioctlGetDeviceInfo(context);
 986             break;
 987
 988         case 0x01:
 989             break;
 990
 991         case 0x05:{     /* IOCTL - WRITE TO BLOCK DEVICE CONTROL CHANNEL */
 992             /*BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx);*/
 993             int drive = DOS_GET_DRIVE(BL_reg(context));
 994
 995             FIXME("program tried to write to block device control channel of drive %d:\n",drive);
 996             /* for (i=0;i<CX_reg(context);i++)
 997                 fprintf(stdnimp,"%02x ",dataptr[i]);
 998             fprintf(stdnimp,"\n");*/
 999             SET_AX( context, context->Ecx );
1000             break;
1001         }
1002         case 0x08:   /* Check if drive is removable. */
1003             TRACE("IOCTL - CHECK IF BLOCK DEVICE REMOVABLE for drive %s\n",
1004                  INT21_DriveName( BL_reg(context)));
1005             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1006             {
1007             case DRIVE_UNKNOWN:
1008                 SetLastError( ERROR_INVALID_DRIVE );
1009                 SET_AX( context, ERROR_INVALID_DRIVE );
1010                 SET_CFLAG(context);
1011                 break;
1012             case DRIVE_REMOVABLE:
1013                 SET_AX( context, 0 );      /* removable */
1014                 break;
1015             default:
1016                 SET_AX( context, 1 );   /* not removable */
1017                 break;
1018             }
1019             break;
1020
1021         case 0x09:   /* CHECK IF BLOCK DEVICE REMOTE */
1022             TRACE("IOCTL - CHECK IF BLOCK DEVICE REMOTE for drive %s\n",
1023                  INT21_DriveName( BL_reg(context)));
1024             switch(GetDriveType16( DOS_GET_DRIVE( BL_reg(context) )))
1025             {
1026             case DRIVE_UNKNOWN:
1027                 SetLastError( ERROR_INVALID_DRIVE );
1028                 SET_AX( context, ERROR_INVALID_DRIVE );
1029                 SET_CFLAG(context);
1030                 break;
1031             case DRIVE_REMOTE:
1032                 SET_DX( context, (1<<9) | (1<<12) );  /* remote */
1033                 break;
1034             default:
1035                 SET_DX( context, 0 );  /* FIXME: use driver attr here */
1036                 break;
1037             }
1038             break;
1039
1040         case 0x0a: /* check if handle (BX) is remote */
1041             TRACE("IOCTL - CHECK IF HANDLE %d IS REMOTE\n",BX_reg(context));
1042             /* returns DX, bit 15 set if remote, bit 14 set if date/time
1043              * not set on close
1044              */
1045             SET_DX( context, 0 );
1046             break;
1047
1048         case 0x0d:
1049             TRACE("IOCTL - GENERIC BLOCK DEVICE REQUEST %s\n",
1050                   INT21_DriveName( BL_reg(context)));
1051             bSetDOSExtendedError = ioctlGenericBlkDevReq(context);
1052             break;
1053
1054         case 0x0e: /* get logical drive mapping */
1055             TRACE("IOCTL - GET LOGICAL DRIVE MAP for drive %s\n",
1056                   INT21_DriveName( BL_reg(context)));
1057             SET_AL( context, 0 ); /* drive has no mapping - FIXME: may be wrong*/
1058             break;
1059
1060         case 0x0F:   /* Set logical drive mapping */
1061             {
1062             int drive;
1063             TRACE("IOCTL - SET LOGICAL DRIVE MAP for drive %s\n",
1064                   INT21_DriveName( BL_reg(context)));
1065             drive = DOS_GET_DRIVE ( BL_reg(context) );
1066             if ( ! DRIVE_SetLogicalMapping ( drive, drive+1 ) )
1067             {
1068                 SET_CFLAG(context);
1069                 SET_AX( context, 0x000F );  /* invalid drive */
1070             }
1071             break;
1072             }
1073
1074         default:
1075             INT_BARF( context, 0x21 );
1076             break;
1077         }
1078         break;
1079
1080     case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
1081         TRACE("CWD - GET CURRENT DIRECTORY for drive %s\n",
1082               INT21_DriveName( DL_reg(context)));
1083         bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
1084         break;
1085
1086     case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
1087         TRACE("FINDFIRST mask 0x%04x spec %s\n",CX_reg(context),
1088               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1089         if (!INT21_FindFirst(context)) break;
1090         /* fall through */
1091
1092     case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
1093         TRACE("FINDNEXT\n");
1094         if (!INT21_FindNext(context))
1095         {
1096             SetLastError( ERROR_NO_MORE_FILES );
1097             SET_AX( context, ERROR_NO_MORE_FILES );
1098             SET_CFLAG(context);
1099         }
1100         else SET_AX( context, 0 );  /* OK */
1101         break;
1102
1103     case 0x5a: /* CREATE TEMPORARY FILE */
1104         TRACE("CREATE TEMPORARY FILE\n");
1105         bSetDOSExtendedError = !INT21_CreateTempFile(context);
1106         break;
1107
1108     case 0x5b: /* CREATE NEW FILE */
1109         TRACE("CREATE NEW FILE 0x%02x for %s\n", CX_reg(context),
1110               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1111         SET_AX( context,
1112                _lcreat16_uniq( CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx),
1113                                CX_reg(context) ));
1114         bSetDOSExtendedError = (AX_reg(context) != 0);
1115         break;
1116
1117     case 0x5e:
1118         bSetDOSExtendedError = INT21_networkfunc (context);
1119         break;
1120
1121     case 0x5f: /* NETWORK */
1122         switch (AL_reg(context))
1123         {
1124         case 0x07: /* ENABLE DRIVE */
1125             TRACE("ENABLE DRIVE %c:\n",(DL_reg(context)+'A'));
1126             if (!DRIVE_Enable( DL_reg(context) ))
1127             {
1128                 SetLastError( ERROR_INVALID_DRIVE );
1129                 bSetDOSExtendedError = TRUE;
1130             }
1131             break;
1132
1133         case 0x08: /* DISABLE DRIVE */
1134             TRACE("DISABLE DRIVE %c:\n",(DL_reg(context)+'A'));
1135             if (!DRIVE_Disable( DL_reg(context) ))
1136             {
1137                 SetLastError( ERROR_INVALID_DRIVE );
1138                 bSetDOSExtendedError = TRUE;
1139             }
1140             break;
1141
1142         default:
1143             /* network software not installed */
1144             TRACE("NETWORK function AX=%04x not implemented\n",AX_reg(context));
1145             SetLastError( ER_NoNetwork );
1146             bSetDOSExtendedError = TRUE;
1147             break;
1148         }
1149         break;
1150
1151     case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
1152         TRACE("TRUENAME %s\n",
1153               (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Esi));
1154         {
1155             if (!GetFullPathNameA( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
1156                                                         context->Esi), 128,
1157                                      CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1158                                                         context->Edi),NULL))
1159                 bSetDOSExtendedError = TRUE;
1160             else SET_AX( context, 0 );
1161         }
1162         break;
1163
1164     case 0x69: /* DISK SERIAL NUMBER */
1165         switch (AL_reg(context))
1166         {
1167         case 0x00:
1168             TRACE("GET DISK SERIAL NUMBER for drive %s\n",
1169                   INT21_DriveName(BL_reg(context)));
1170             if (!INT21_GetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
1171             else SET_AX( context, 0 );
1172             break;
1173
1174         case 0x01:
1175             TRACE("SET DISK SERIAL NUMBER for drive %s\n",
1176                   INT21_DriveName(BL_reg(context)));
1177             if (!INT21_SetDiskSerialNumber(context)) bSetDOSExtendedError = TRUE;
1178             else SET_AX( context, 1 );
1179             break;
1180         }
1181         break;
1182
1183     case 0x6C: /* Extended Open/Create*/
1184         TRACE("EXTENDED OPEN/CREATE %s\n",
1185               (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edi));
1186         bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
1187         break;
1188
1189     case 0x71: /* MS-DOS 7 (Windows95) - LONG FILENAME FUNCTIONS */
1190         switch(AL_reg(context))
1191         {
1192         case 0x47:  /* Get current directory */
1193             TRACE(" LONG FILENAME - GET CURRENT DIRECTORY for drive %s\n",
1194                   INT21_DriveName(DL_reg(context)));
1195             bSetDOSExtendedError = !INT21_GetCurrentDirectory(context);
1196             break;
1197
1198         case 0x4e:  /* Find first file */
1199             TRACE(" LONG FILENAME - FIND FIRST MATCHING FILE for %s\n",
1200                   (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx));
1201             /* FIXME: use attributes in CX */
1202             SET_AX( context, FindFirstFile16(
1203                         CTX_SEG_OFF_TO_LIN(context, context->SegDs,context->Edx),
1204                         (WIN32_FIND_DATAA *)CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1205                                                                context->Edi)));
1206             if (AX_reg(context) == INVALID_HANDLE_VALUE16)
1207                 bSetDOSExtendedError = TRUE;
1208             break;
1209         case 0x4f:  /* Find next file */
1210             TRACE("LONG FILENAME - FIND NEXT MATCHING FILE for handle %d\n",
1211                   BX_reg(context));
1212             if (!FindNextFile16( BX_reg(context),
1213                     (WIN32_FIND_DATAA *)CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1214                                                              context->Edi)))
1215                 bSetDOSExtendedError = TRUE;
1216             break;
1217         case 0xa0:
1218             {
1219                 LPCSTR driveroot = (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs,context->Edx);
1220                 LPSTR buffer = (LPSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegEs,context->Edi);
1221                 DWORD filename_len, flags;
1222
1223                 TRACE("LONG FILENAME - GET VOLUME INFORMATION for drive having root dir '%s'.\n", driveroot);
1224                 SET_AX( context, 0 );
1225                 if (!GetVolumeInformationA( driveroot, NULL, 0, NULL, &filename_len,
1226                                             &flags, buffer, 8 ))
1227                 {
1228                     INT_BARF( context, 0x21 );
1229                     SET_CFLAG(context);
1230                     break;
1231                 }
1232                 SET_BX( context, flags | 0x4000 ); /* support for LFN functions */
1233                 SET_CX( context, filename_len );
1234                 SET_DX( context, MAX_PATH ); /* FIXME: which len if DRIVE_SHORT_NAMES ? */
1235             }
1236             break;
1237         case 0xa1:  /* Find close */
1238             TRACE("LONG FILENAME - FINDCLOSE for handle %d\n",
1239                   BX_reg(context));
1240             bSetDOSExtendedError = (!FindClose16( BX_reg(context) ));
1241             break;
1242         case 0x60:
1243           switch(CL_reg(context))
1244           {
1245             case 0x01:  /* Get short filename or path */
1246               if (!GetShortPathNameA
1247                   ( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
1248                                        context->Esi),
1249                     CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1250                                        context->Edi), 67))
1251                 bSetDOSExtendedError = TRUE;
1252               else SET_AX( context, 0 );
1253               break;
1254             case 0x02:  /* Get canonical long filename or path */
1255               if (!GetFullPathNameA
1256                   ( CTX_SEG_OFF_TO_LIN(context, context->SegDs,
1257                                        context->Esi), 128,
1258                     CTX_SEG_OFF_TO_LIN(context, context->SegEs,
1259                                        context->Edi),NULL))
1260                 bSetDOSExtendedError = TRUE;
1261               else SET_AX( context, 0 );
1262               break;
1263             default:
1264               FIXME("Unimplemented long file name function:\n");
1265               INT_BARF( context, 0x21 );
1266               SET_CFLAG(context);
1267               SET_AL( context, 0 );
1268               break;
1269           }
1270           break;
1271         case 0x6c:  /* Create or open file */
1272             TRACE("LONG FILENAME - CREATE OR OPEN FILE %s\n",
1273                  (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Esi));
1274           /* translate Dos 7 action to Dos 6 action */
1275             bSetDOSExtendedError = INT21_ExtendedOpenCreateFile(context);
1276             break;
1277
1278         case 0x3b:  /* Change directory */
1279             TRACE("LONG FILENAME - CHANGE DIRECTORY %s\n",
1280                  (LPCSTR)CTX_SEG_OFF_TO_LIN(context,  context->SegDs, context->Edx));
1281             if (!SetCurrentDirectoryA(CTX_SEG_OFF_TO_LIN(context,
1282                                                 context->SegDs,
1283                                                 context->Edx
1284                                         ))
1285             ) {
1286                 SET_CFLAG(context);
1287                 SET_AL( context, GetLastError() );
1288             }
1289             break;
1290
1291         default:
1292             FIXME("Unimplemented long file name function:\n");
1293             INT_BARF( context, 0x21 );
1294             SET_CFLAG(context);
1295             SET_AL( context, 0 );
1296             break;
1297         }
1298         break;
1299
1300
1301     case 0x73: /* MULTIPLEXED: Win95 OSR2/Win98 FAT32 calls */
1302         TRACE("windows95 function AX %04x\n",
1303                     AX_reg(context));
1304
1305         switch (AL_reg(context))
1306                 {
1307                 case 0x02:      /* Get Extended Drive Parameter Block for specific drive */
1308                                 /* ES:DI points to word with length of data (should be 0x3d) */
1309                         {
1310                                 WORD *buffer;
1311                                 struct EDPB *edpb;
1312                             DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
1313                             char root[] = "A:\\";
1314
1315                                 buffer = (WORD *)CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Edi);
1316
1317                                 TRACE("Get Extended DPB: linear buffer address is %p\n", buffer);
1318
1319                                 /* validate passed-in buffer lengths */
1320                                 if ((*buffer != 0x3d) || (context->Ecx != 0x3f))
1321                                 {
1322                                         WARN("Get Extended DPB: buffer lengths incorrect\n");
1323                                         WARN("CX = %lx, buffer[0] = %x\n", context->Ecx, *buffer);
1324                                         SET_CFLAG(context);
1325                                         SET_AL( context, 0x18 );                /* bad buffer length */
1326                                 }
1327
1328                                 /* buffer checks out */
1329                                 buffer++;               /* skip over length word now */
1330                                 if (FillInDrivePB( DX_reg(context) ) )
1331                                 {
1332                                         edpb = (struct EDPB *)buffer;
1333
1334                                         /* copy down the old-style DPB portion first */
1335                                         memcpy(&edpb->dpb, &heap->dpb, sizeof(struct DPB));
1336
1337                                         /* now fill in the extended entries */
1338                                         edpb->edpb_flags = 0;
1339                                         edpb->next_edpb = 0;
1340                                         edpb->free_cluster = edpb->free_cluster2 = 0;
1341
1342                                         /* determine free disk space */
1343                                     *root += DOS_GET_DRIVE( DX_reg(context) );
1344                                     GetDiskFreeSpaceA( root, &cluster_sectors, &sector_bytes,
1345                               &free_clusters, &total_clusters );
1346
1347                                         edpb->clusters_free = (free_clusters&0xffff);
1348
1349                                         edpb->clusters_free_hi = free_clusters >> 16;
1350                                         edpb->mirroring_flags = 0;
1351                                         edpb->info_sector = 0xffff;
1352                                         edpb->spare_boot_sector = 0xffff;
1353                                         edpb->first_cluster = 0;
1354                                         edpb->max_cluster = total_clusters;
1355                                         edpb->fat_clusters = 32;        /* made-up value */
1356                                         edpb->root_cluster = 0;
1357
1358                                         RESET_CFLAG(context);   /* clear carry */
1359                                         SET_AX( context, 0 );
1360                                 }
1361                                 else
1362                                 {
1363                                     SET_AX( context, 0x00ff );
1364                                     SET_CFLAG(context);
1365                                 }
1366                         }
1367                         break;
1368
1369                 case 0x03:      /* Get Extended free space on drive */
1370                 case 0x04:  /* Set DPB for formatting */
1371                 case 0x05:  /* extended absolute disk read/write */
1372                         FIXME("Unimplemented FAT32 int32 function %04x\n", AX_reg(context));
1373                         SET_CFLAG(context);
1374                         SET_AL( context, 0 );
1375                         break;
1376                 }
1377
1378                 break;
1379
1380     default:
1381         INT_BARF( context, 0x21 );
1382         break;
1383
1384     } /* END OF SWITCH */
1385
1386     if( bSetDOSExtendedError )          /* set general error condition */
1387     {
1388         SET_AX( context, GetLastError() );
1389         SET_CFLAG(context);
1390     }
1391 }