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Sweden-Number/miscemu/int21.c

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/*
* (c) 1993, 1994 Erik Bos
*/
#include <time.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/file.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <utime.h>
#include <ctype.h>
#include "dos_fs.h"
#include "drive.h"
#include "file.h"
#include "windows.h"
#include "msdos.h"
#include "registers.h"
#include "ldt.h"
#include "task.h"
#include "options.h"
#include "miscemu.h"
#include "xmalloc.h"
#include "stddebug.h"
#include "debug.h"
#ifdef __svr4__
/* SVR4 DOESNTdo locking the same way must implement properly */
#define LOCK_EX 0
#define LOCK_SH 1
#define LOCK_NB 8
#endif
#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
/* Define the drive parameter block, as used by int21/1F
* and int21/32. This table can be accessed through the
* global 'dpb' pointer, which points into the local dos
* heap.
*/
struct DPB
{
BYTE drive_num; /* 0=A, etc. */
BYTE unit_num; /* Drive's unit number (?) */
WORD sector_size; /* Sector size in bytes */
BYTE high_sector; /* Highest sector in a cluster */
BYTE shift; /* Shift count (?) */
WORD reserved; /* Number of reserved sectors at start */
BYTE num_FAT; /* Number of FATs */
WORD dir_entries; /* Number of root dir entries */
WORD first_data; /* First data sector */
WORD high_cluster; /* Highest cluster number */
WORD sectors_in_FAT; /* Number of sectors per FAT */
WORD start_dir; /* Starting sector of first dir */
DWORD driver_head; /* Address of device driver header (?) */
BYTE media_ID; /* Media ID */
BYTE access_flag; /* Prev. accessed flag (0=yes,0xFF=no) */
DWORD next; /* Pointer to next DPB in list */
WORD free_search; /* Free cluster search start */
WORD free_clusters; /* Number of free clusters (0xFFFF=unknown) */
};
WORD CodePage = 437;
struct DPB *dpb;
DWORD dpbsegptr;
struct DosHeap {
BYTE InDosFlag;
BYTE mediaID;
BYTE biosdate[8];
struct DPB dpb;
};
static struct DosHeap *heap;
static WORD DosHeapHandle;
WORD sharing_retries = 3; /* number of retries at sharing violation */
WORD sharing_pause = 1; /* pause between retries */
extern char TempDirectory[];
BYTE *GetCurrentDTA(void)
{
TDB *pTask = (TDB *)GlobalLock( GetCurrentTask() );
return (BYTE *)PTR_SEG_TO_LIN( pTask->dta );
}
void ChopOffWhiteSpace(char *string)
{
int length;
for (length = strlen(string) ; length ; length--)
if (string[length] == ' ')
string[length] = '\0';
}
static void CreateBPB(int drive, BYTE *data)
{
if (drive > 1) {
setword(data, 512);
data[2] = 2;
setword(&data[3], 0);
data[5] = 2;
setword(&data[6], 240);
setword(&data[8], 64000);
data[0x0a] = 0xf8;
setword(&data[0x0b], 40);
setword(&data[0x0d], 56);
setword(&data[0x0f], 2);
setword(&data[0x11], 0);
setword(&data[0x1f], 800);
data[0x21] = 5;
setword(&data[0x22], 1);
} else { /* 1.44mb */
setword(data, 512);
data[2] = 2;
setword(&data[3], 0);
data[5] = 2;
setword(&data[6], 240);
setword(&data[8], 2880);
data[0x0a] = 0xf8;
setword(&data[0x0b], 6);
setword(&data[0x0d], 18);
setword(&data[0x0f], 2);
setword(&data[0x11], 0);
setword(&data[0x1f], 80);
data[0x21] = 7;
setword(&data[0x22], 2);
}
}
static int INT21_GetFreeDiskSpace(struct sigcontext_struct *context)
{
DWORD size, available;
int drive = DOS_GET_DRIVE( DL_reg(context) );
if (!DRIVE_GetFreeSpace(drive, &size, &available)) return 0;
CX_reg(context) = 512; /* bytes per sector */
size /= 512;
available /= 512;
AX_reg(context) = 1; /* sectors per cluster */
while (AX_reg(context) * 65530 < size) AX_reg(context) *= 2;
BX_reg(context) = available / AX_reg(context); /* free clusters */
DX_reg(context) = size / AX_reg(context); /* total clusters */
return 1;
}
static int INT21_GetDriveAllocInfo(struct sigcontext_struct *context)
{
if (!INT21_GetFreeDiskSpace( context )) return 0;
heap->mediaID = 0xf0;
DS_reg(context) = DosHeapHandle;
BX_reg(context) = (int)&heap->mediaID - (int)heap;
return 1;
}
static void GetDrivePB(struct sigcontext_struct *context, int drive)
{
if(!DRIVE_IsValid(drive))
{
DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
AX_reg(context) = 0x00ff;
}
else
{
dprintf_int(stddeb, "int21: GetDrivePB not fully implemented.\n");
/* FIXME: I have no idea what a lot of this information should
* say or whether it even really matters since we're not allowing
* direct block access. However, some programs seem to depend on
* getting at least _something_ back from here. The 'next' pointer
* does worry me, though. Should we have a complete table of
* separate DPBs per drive? Probably, but I'm lazy. :-) -CH
*/
dpb->drive_num = dpb->unit_num = drive; /* The same? */
dpb->sector_size = 512;
dpb->high_sector = 1;
dpb->shift = drive < 2 ? 0 : 6; /* 6 for HD, 0 for floppy */
dpb->reserved = 0;
dpb->num_FAT = 1;
dpb->dir_entries = 2;
dpb->first_data = 2;
dpb->high_cluster = 64000;
dpb->sectors_in_FAT = 1;
dpb->start_dir = 1;
dpb->driver_head = 0;
dpb->media_ID = (drive > 1) ? 0xF8 : 0xF0;
dpb->access_flag = 0;
dpb->next = 0;
dpb->free_search = 0;
dpb->free_clusters = 0xFFFF; /* unknown */
AL_reg(context) = 0x00;
DS_reg(context) = SELECTOROF(dpbsegptr);
BX_reg(context) = OFFSETOF(dpbsegptr);
}
}
static void ioctlGetDeviceInfo(struct sigcontext_struct *context)
{
dprintf_int (stddeb, "int21: ioctl (%d, GetDeviceInfo)\n", BX_reg(context));
DX_reg(context) = 0x0942;
/* bits 0-5 are current drive
* bit 6 - file has NOT been written..FIXME: correct?
* bit 8 - generate int24 if no diskspace on write/ read past end of file
* bit 11 - media not removable
*/
RESET_CFLAG(context);
}
static void ioctlGenericBlkDevReq(struct sigcontext_struct *context)
{
BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
int drive = DOS_GET_DRIVE( BL_reg(context) );
if (!DRIVE_IsValid(drive))
{
DOS_ERROR( ER_FileNotFound, EC_NotFound, SA_Abort, EL_Disk );
AX_reg(context) = DOS_ExtendedError;
SET_CFLAG(context);
return;
}
if (CH_reg(context) != 0x08)
{
INT_BARF( context, 0x21 );
return;
}
switch (CL_reg(context)) {
case 0x60: /* get device parameters */
/* used by w4wgrp's winfile */
memset(dataptr, 0, 0x26);
dataptr[0] = 0x04;
dataptr[6] = 0; /* media type */
if (drive > 1)
{
dataptr[1] = 0x05; /* fixed disk */
setword(&dataptr[2], 0x01); /* non removable */
setword(&dataptr[4], 0x300); /* # of cylinders */
}
else
{
dataptr[1] = 0x07; /* block dev, floppy */
setword(&dataptr[2], 0x02); /* removable */
setword(&dataptr[4], 80); /* # of cylinders */
}
CreateBPB(drive, &dataptr[7]);
RESET_CFLAG(context);
return;
default:
INT_BARF( context, 0x21 );
}
}
static void GetSystemDate(struct sigcontext_struct *context)
{
struct tm *now;
time_t ltime;
ltime = time(NULL);
now = localtime(&ltime);
CX_reg(context) = now->tm_year + 1900;
DX_reg(context) = ((now->tm_mon + 1) << 8) | now->tm_mday;
AX_reg(context) = now->tm_wday;
}
static void INT21_GetSystemTime(struct sigcontext_struct *context)
{
struct tm *now;
struct timeval tv;
time_t seconds;
gettimeofday(&tv,NULL); /* Note use of gettimeofday(), instead of time() */
seconds = tv.tv_sec;
now = localtime(&seconds);
CX_reg(context) = (now->tm_hour<<8) | now->tm_min;
DX_reg(context) = (now->tm_sec<<8) | tv.tv_usec/10000;
/* Note hundredths of seconds */
}
static void CreateFile(struct sigcontext_struct *context)
{
AX_reg(context) = _lcreat( PTR_SEG_OFF_TO_LIN( DS_reg(context),
DX_reg(context) ), CX_reg(context) );
if (AX_reg(context) == (WORD)HFILE_ERROR)
{
AX_reg(context) = DOS_ExtendedError;
SET_CFLAG(context);
}
}
void OpenExistingFile(struct sigcontext_struct *context)
{
AX_reg(context) = _lopen( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
AL_reg(context) );
if (AX_reg(context) == (WORD)HFILE_ERROR)
{
AX_reg(context) = DOS_ExtendedError;
SET_CFLAG(context);
}
#if 0
int handle;
int mode;
int lock;
dprintf_int (stddeb, "int21: open (%s, %d) = %d\n",
DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context))), mode, handle);
switch (AX_reg(context) & 0x0070)
{
case 0x00: /* compatability mode */
case 0x40: /* DENYNONE */
lock = -1;
break;
case 0x30: /* DENYREAD */
dprintf_int(stddeb,
"OpenExistingFile (%s): DENYREAD changed to DENYALL\n",
(char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)));
case 0x10: /* DENYALL */
lock = LOCK_EX;
break;
case 0x20: /* DENYWRITE */
lock = LOCK_SH;
break;
default:
lock = -1;
}
if (lock != -1)
{
int result,retries=sharing_retries;
{
#ifdef __svr4__
printf("Should call flock and needs porting to lockf\n");
result = 0;
retries = 0;
#else
result = flock(handle, lock | LOCK_NB);
#endif
if ( retries && (!result) )
{
int i;
for(i=0;i<32768*((int)sharing_pause);i++)
result++; /* stop the optimizer */
for(i=0;i<32768*((int)sharing_pause);i++)
result--;
}
}
while( (!result) && (!(retries--)) );
if(result)
{
errno_to_doserr();
AX_reg(context) = ExtendedError;
close(handle);
SET_CFLAG(context);
return;
}
}
Error (0,0,0);
AX_reg(context) = handle;
RESET_CFLAG(context);
#endif
}
static void CloseFile(struct sigcontext_struct *context)
{
if ((AX_reg(context) = _lclose( BX_reg(context) )) != 0)
{
AX_reg(context) = DOS_ExtendedError;
SET_CFLAG(context);
}
}
void ExtendedOpenCreateFile(struct sigcontext_struct *context)
{
BYTE action=DL_reg(context);
dprintf_int(stddeb, "int21: extended open/create: file= %s \n",
DOSFS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),SI_reg(context)),FALSE));
/* Shuffle arguments to call OpenExistingFile */
AL_reg(context) = BL_reg(context);
DX_reg(context) = SI_reg(context);
/* BX,CX and DX should be preserved */
OpenExistingFile(context);
if ((EFL_reg(context) & 0x0001)==0)
{ /* It exists */
dprintf_int(stddeb, "int21: extended open/create %s exists \n",
DOSFS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),SI_reg(context)),TRUE));
/* Now decide what do do */
if ((action & 0x07)== 0)
{
BX_reg(context) = AX_reg(context);
CloseFile(context);
AX_reg(context) = 0x0050;/*File exists*/
CX_reg(context) = 0;
SET_CFLAG(context);
dprintf_int(stddeb, "int21: extended open/create: failed because file exixts \n");
return;
}
if ((action & 0x07)== 2) {
/* Truncate it, but first check if opend for write */
if ((BL_reg(context) & 0x0007)== 0) {
BX_reg(context) = AX_reg(context);
CloseFile(context);
dprintf_int(stddeb, "int21: extended open/create: failed, trunc on ro file");
AX_reg(context) = 0x000C;/*Access code invalid*/
CX_reg(context) = 0;
SET_CFLAG(context);
return;
}
/* Shuffle arguments to call CloseFile */
dprintf_int(stddeb, "int21: extended open/create: Closing before truncate\n");
BX_reg(context) = AX_reg(context);
/* BX and DX should be preserved */
CloseFile(context);
if (EFL_reg(context) & 0x0001) {
dprintf_int(stddeb, "int21: extended open/create: close before trunc failed");
AX_reg(context) = 0x0019;/*Seek Error*/
CX_reg(context) = 0;
SET_CFLAG(context);
}
/* Shuffle arguments to call CreateFile */
dprintf_int(stddeb, "int21: extended open/create: Truncating\n");
AL_reg(context) = BL_reg(context);
/* CX is still the same */
DX_reg(context) = SI_reg(context);
CreateFile(context);
if (EFL_reg(context) & 0x0001) { /*no file open, flags set */
dprintf_int(stddeb, "int21: extended open/create: truncfailed");
return;
}
CX_reg(context) = 3;
return;
}
CX_reg(context) = 1;
return;
}
else /* file does not exist */
{
RESET_CFLAG(context); /* was set by OpenExistingFile(context) */
dprintf_int(stddeb, "int21: extended open/create %s dosen't exists \n",
DOSFS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),SI_reg(context)),FALSE));
if ((action & 0xF0)== 0) {
CX_reg(context) = 0;
SET_CFLAG(context);
dprintf_int(stddeb, "int21: extended open/create: failed, file dosen't exist\n");
return;
}
/* Shuffle arguments to call CreateFile */
dprintf_int(stddeb, "int21: extended open/create: Creating\n");
AL_reg(context) = BL_reg(context);
/* CX should still be the same */
DX_reg(context) = SI_reg(context);
CreateFile(context);
if (EFL_reg(context) & 0x0001) { /*no file open, flags set */
dprintf_int(stddeb, "int21: extended open/create: create failed\n");
return;
}
CX_reg(context) = 2;
return;
}
}
static int INT21_RenameFile(struct sigcontext_struct *context)
{
const char *newname, *oldname;
char *buffer;
/* FIXME: should not rename over an existing file */
dprintf_int(stddeb,"int21: renaming %s to %s\n",
(char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)),
(char *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context)));
oldname = DOSFS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context)), TRUE );
if (!oldname) return 0;
buffer = xstrdup( oldname );
newname = DOSFS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(ES_reg(context),
DI_reg(context)), FALSE );
if (!newname)
{
free( buffer );
return 0;
}
if (rename( buffer, newname) == -1)
{
FILE_SetDosError();
free( buffer );
return 0;
}
free( buffer );
return 1;
}
static void INT21_ChangeDir(struct sigcontext_struct *context)
{
int drive;
char *dirname = PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context));
dprintf_int(stddeb,"int21: changedir %s\n", dirname);
if (dirname[1] == ':')
{
drive = toupper(dirname[0]) - 'A';
dirname += 2;
}
else drive = DRIVE_GetCurrentDrive();
if (!DRIVE_Chdir( drive, dirname ))
{
AX_reg(context) = DOS_ExtendedError;
SET_CFLAG(context);
}
}
static int INT21_FindFirst(struct sigcontext_struct *context)
{
const char *path, *unixPath, *mask;
char *p;
FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA();
path = (const char *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
dta->unixPath = NULL;
if (!(unixPath = DOSFS_GetUnixFileName( path, FALSE )))
{
AX_reg(context) = DOS_ExtendedError;
SET_CFLAG(context);
return 0;
}
dta->unixPath = xstrdup( unixPath );
p = strrchr( dta->unixPath, '/' );
*p = '\0';
if (!(mask = DOSFS_ToDosFCBFormat( p + 1 )))
{
free( dta->unixPath );
dta->unixPath = NULL;
DOS_ERROR( ER_FileNotFound, EC_NotFound, SA_Abort, EL_Disk );
AX_reg(context) = ER_FileNotFound;
SET_CFLAG(context);
return 0;
}
memcpy( dta->mask, mask, sizeof(dta->mask) );
dta->drive = (path[0] && (path[1] == ':')) ? toupper(path[0]) - 'A'
: DRIVE_GetCurrentDrive();
dta->count = 0;
dta->search_attr = CL_reg(context);
return 1;
}
static int INT21_FindNext(struct sigcontext_struct *context)
{
FINDFILE_DTA *dta = (FINDFILE_DTA *)GetCurrentDTA();
DOS_DIRENT entry;
int count;
if (!dta->unixPath) return 0;
if (!(count = DOSFS_FindNext( dta->unixPath, dta->mask, dta->drive,
dta->search_attr, dta->count, &entry )))
{
free( dta->unixPath );
dta->unixPath = NULL;
return 0;
}
if ((int)dta->count + count > 0xffff)
{
fprintf( stderr, "Too many directory entries in %s\n", dta->unixPath );
free( dta->unixPath );
dta->unixPath = NULL;
return 0;
}
dta->count += count;
dta->fileattr = entry.attr;
dta->filetime = entry.time;
dta->filedate = entry.date;
dta->filesize = entry.size;
strcpy( dta->filename, DOSFS_ToDosDTAFormat( entry.name ) );
return 1;
}
static int INT21_SetFileDateTime(struct sigcontext_struct *context)
{
fprintf( stderr, "INT21_SetFileDateTime: not implemented yet.\n" );
return 1;
#if 0
char *filename;
struct utimbuf filetime;
/* FIXME: Argument isn't the name of the file in DS:DX,
but the file handle in BX */
filename = DOSFS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context)),TRUE );
filetime.actime = 0L;
filetime.modtime = filetime.actime;
utime(filename, &filetime);
RESET_CFLAG(context);
#endif
}
static int INT21_CreateTempFile(struct sigcontext_struct *context)
{
static int counter = 0;
char *name = PTR_SEG_OFF_TO_LIN( DS_reg(context), DX_reg(context) );
char *p = name + strlen(name);
for (;;)
{
sprintf( p, "wine%04x.%03d", (int)getpid(), counter );
counter = (counter + 1) % 1000;
if ((AX_reg(context) = _lcreat_uniq( name, 0 )) != (WORD)HFILE_ERROR)
{
dprintf_int( stddeb, "INT21_CreateTempFile: created %s\n", name );
return 1;
}
if (DOS_ExtendedError != ER_FileExists) return 0;
}
}
static int INT21_GetCurrentDirectory(struct sigcontext_struct *context)
{
int drive = DOS_GET_DRIVE( DL_reg(context) );
char *ptr = (char *)PTR_SEG_OFF_TO_LIN( DS_reg(context), SI_reg(context) );
if (!DRIVE_IsValid(drive))
{
DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
return 0;
}
lstrcpyn( ptr, DRIVE_GetDosCwd(drive), 64 );
if (!ptr[0]) strcpy( ptr, "\\" );
return 1;
}
static int INT21_GetDiskSerialNumber(struct sigcontext_struct *context)
{
BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
int drive = DOS_GET_DRIVE( BL_reg(context) );
if (!DRIVE_IsValid(drive))
{
DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
return 0;
}
*(WORD *)dataptr = 0;
*(DWORD *)(dataptr + 2) = DRIVE_GetSerialNumber( drive );
memcpy( dataptr + 6, DRIVE_GetLabel( drive ), 11 );
strncpy(dataptr + 0x11, "FAT16 ", 8);
return 1;
}
static int INT21_SetDiskSerialNumber(struct sigcontext_struct *context)
{
BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
int drive = DOS_GET_DRIVE( BL_reg(context) );
if (!DRIVE_IsValid(drive))
{
DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
return 0;
}
DRIVE_SetSerialNumber( drive, *(DWORD *)(dataptr + 2) );
return 1;
}
/* microsoft's programmers should be shot for using CP/M style int21
calls in Windows for Workgroup's winfile.exe */
static int INT21_FindFirstFCB( struct sigcontext_struct *context )
{
BYTE *fcb = (BYTE *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
FINDFILE_FCB *pFCB;
BYTE attr;
char buffer[] = "A:.";
const char *unixPath;
if (*fcb == 0xff)
{
attr = fcb[6];
pFCB = (FINDFILE_FCB *)(fcb + 7);
}
else
{
attr = 0;
pFCB = (FINDFILE_FCB *)fcb;
}
buffer[0] += DOS_GET_DRIVE( pFCB->drive );
pFCB->unixPath = NULL;
if (!(unixPath = DOSFS_GetUnixFileName( buffer, TRUE ))) return 0;
pFCB->unixPath = xstrdup( unixPath );
pFCB->count = 0;
return 1;
}
static int INT21_FindNextFCB( struct sigcontext_struct *context )
{
BYTE *fcb = (BYTE *)PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
FINDFILE_FCB *pFCB;
DOS_DIRENTRY_LAYOUT *pResult = (DOS_DIRENTRY_LAYOUT *)GetCurrentDTA();
DOS_DIRENT entry;
BYTE attr;
int count;
if (*fcb == 0xff)
{
attr = fcb[6];
pFCB = (FINDFILE_FCB *)(fcb + 7);
}
else
{
attr = 0;
pFCB = (FINDFILE_FCB *)fcb;
}
if (!pFCB->unixPath) return 0;
if (!(count = DOSFS_FindNext( pFCB->unixPath, pFCB->filename,
DOS_GET_DRIVE( pFCB->drive ), attr,
pFCB->count, &entry )))
{
free( pFCB->unixPath );
pFCB->unixPath = NULL;
return 0;
}
pFCB->count += count;
memcpy( pResult->filename, entry.name, sizeof(pResult->filename) );
pResult->fileattr = entry.attr;
memset( pResult->reserved, 0, sizeof(pResult->reserved) );
pResult->filetime = entry.time;
pResult->filedate = entry.date;
pResult->cluster = 0; /* what else? */
pResult->filesize = entry.size;
return 1;
}
static void DeleteFileFCB(struct sigcontext_struct *context)
{
fprintf( stderr, "DeleteFileFCB: not implemented yet\n" );
#if 0
BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
struct dosdirent *dp;
char temp[256], *ptr;
int drive = DOS_GET_DRIVE( *fcb );
DumpFCB( fcb );
temp[0] = '\\';
strcpy(temp+1, DRIVE_GetDosCwd(drive));
strcat(temp, "\\");
strncat(temp, fcb + 1, 8);
ChopOffWhiteSpace(temp);
strncat(temp, fcb + 9, 3);
ChopOffWhiteSpace(temp);
if ((dp = DOS_opendir(temp)) == NULL) {
Error(InvalidDrive, EC_MediaError , EL_Disk);
AX_reg(context) = 0xff;
return;
}
temp[0] = '\\';
strcpy(temp+1, DRIVE_GetDosCwd(drive) );
strcat(temp, "\\");
ptr = temp + strlen(temp);
while (DOS_readdir(dp) != NULL)
{
strcpy(ptr, dp->filename);
dprintf_int(stddeb, "int21: delete file %s\n", temp);
/* unlink(DOS_GetUnixFileName(temp)); */
}
DOS_closedir(dp);
AX_reg(context) = 0;
#endif
}
static void RenameFileFCB(struct sigcontext_struct *context)
{
fprintf( stderr, "RenameFileFCB: not implemented yet\n" );
#if 0
BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
struct dosdirent *dp;
char temp[256], oldname[256], newname[256], *oldnameptr, *newnameptr;
int drive = DOS_GET_DRIVE( *fcb );
DumpFCB( fcb );
temp[0] = '\\';
strcpy(temp+1, DRIVE_GetDosCwd(drive) );
strcat(temp, "\\");
strncat(temp, fcb + 1, 8);
ChopOffWhiteSpace(temp);
strncat(temp, fcb + 9, 3);
ChopOffWhiteSpace(temp);
if ((dp = DOS_opendir(temp)) == NULL) {
Error(InvalidDrive, EC_MediaError , EL_Disk);
AX_reg(context) = 0xff;
return;
}
oldname[0] = '\\';
strcpy(oldname+1, DRIVE_GetDosCwd(drive) );
strcat(oldname, "\\");
strcpy( newname, oldname );
oldnameptr = oldname + strlen(oldname);
newnameptr = newname + strlen(newname);
while (DOS_readdir(dp) != NULL)
{
strcpy(oldnameptr, dp->filename);
strcpy(newnameptr, fcb + 1);
dprintf_int(stddeb, "int21: renamefile %s -> %s\n",
oldname, newname);
}
DOS_closedir(dp);
AX_reg(context) = 0;
#endif
}
static void fLock (struct sigcontext_struct * context)
{
#if 0
struct flock f;
int result,retries=sharing_retries;
f.l_start = MAKELONG(DX_reg(context),CX_reg(context));
f.l_len = MAKELONG(DI_reg(context),SI_reg(context));
f.l_whence = 0;
f.l_pid = 0;
switch ( AX_reg(context) & 0xff )
{
case 0x00: /* LOCK */
f.l_type = F_WRLCK;
break;
case 0x01: /* UNLOCK */
f.l_type = F_UNLCK;
break;
default:
AX_reg(context) = 0x0001;
SET_CFLAG(context);
return;
}
{
result = fcntl(BX_reg(context),F_SETLK,&f);
if ( retries && (!result) )
{
int i;
for(i=0;i<32768*((int)sharing_pause);i++)
result++; /* stop the optimizer */
for(i=0;i<32768*((int)sharing_pause);i++)
result--;
}
}
while( (!result) && (!(retries--)) );
if(result)
{
FILE_SetDosError();
AX_reg(context) = DOS_ExtendedError;
SET_CFLAG(context);
return;
}
#endif
}
static int INT21_GetFileAttribute (struct sigcontext_struct * context)
{
const char *unixName;
unixName = DOSFS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)), TRUE );
if (!unixName) return 0;
if (!FILE_Stat( unixName, &CL_reg(context), NULL, NULL, NULL )) return 0;
CH_reg(context) = 0;
dprintf_int( stddeb, "INT21_GetFileAttributes(%s) = 0x%x\n",
unixName, CX_reg(context) );
return 1;
}
extern void LOCAL_PrintHeap (WORD ds);
/***********************************************************************
* DOS3Call (KERNEL.102)
*/
void DOS3Call( struct sigcontext_struct context )
{
dprintf_int( stddeb, "int21: AX=%04x BX=%04x CX=%04x DX=%04x "
"SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
AX_reg(&context), BX_reg(&context), CX_reg(&context),
DX_reg(&context), SI_reg(&context), DI_reg(&context),
DS_reg(&context), ES_reg(&context), EFL_reg(&context));
if (AH_reg(&context) == 0x59) /* Get extended error info */
{
AX_reg(&context) = DOS_ExtendedError;
BH_reg(&context) = DOS_ErrorClass;
BL_reg(&context) = DOS_ErrorAction;
CH_reg(&context) = DOS_ErrorLocus;
return;
}
DOS_ERROR( 0, 0, 0, 0 );
RESET_CFLAG(&context); /* Not sure if this is a good idea */
switch(AH_reg(&context))
{
case 0x00: /* TERMINATE PROGRAM */
TASK_KillCurrentTask( 0 );
break;
case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
case 0x03: /* READ CHARACTER FROM STDAUX */
case 0x04: /* WRITE CHARACTER TO STDAUX */
case 0x05: /* WRITE CHARACTER TO PRINTER */
case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
case 0x07: /* DIRECT CHARACTER INPUT, WITHOUT ECHO */
case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
case 0x09: /* WRITE STRING TO STANDARD OUTPUT */
case 0x0a: /* BUFFERED INPUT */
case 0x0b: /* GET STDIN STATUS */
case 0x0c: /* FLUSH BUFFER AND READ STANDARD INPUT */
case 0x0f: /* OPEN FILE USING FCB */
case 0x10: /* CLOSE FILE USING FCB */
case 0x14: /* SEQUENTIAL READ FROM FCB FILE */
case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */
case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */
case 0x21: /* READ RANDOM RECORD FROM FCB FILE */
case 0x22: /* WRITE RANDOM RECORD TO FCB FILE */
case 0x23: /* GET FILE SIZE FOR FCB */
case 0x24: /* SET RANDOM RECORD NUMBER FOR FCB */
case 0x26: /* CREATE NEW PROGRAM SEGMENT PREFIX */
case 0x27: /* RANDOM BLOCK READ FROM FCB FILE */
case 0x28: /* RANDOM BLOCK WRITE TO FCB FILE */
case 0x29: /* PARSE FILENAME INTO FCB */
case 0x2e: /* SET VERIFY FLAG */
case 0x37: /* "SWITCHAR" - GET SWITCH CHARACTER
"SWITCHAR" - SET SWITCH CHARACTER
"AVAILDEV" - SPECIFY \DEV\ PREFIX USE */
case 0x54: /* GET VERIFY FLAG */
INT_BARF( &context, 0x21 );
break;
case 0x18: /* NULL FUNCTIONS FOR CP/M COMPATIBILITY */
case 0x1d:
case 0x1e:
case 0x20:
case 0x6b: /* NULL FUNCTION */
AL_reg(&context) = 0;
break;
case 0x5c: /* "FLOCK" - RECORD LOCKING */
fLock(&context);
break;
case 0x0d: /* DISK BUFFER FLUSH */
RESET_CFLAG(&context); /* dos 6+ only */
break;
case 0x0e: /* SELECT DEFAULT DRIVE */
DRIVE_SetCurrentDrive( DL_reg(&context) );
AL_reg(&context) = MAX_DOS_DRIVES;
break;
case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
if (!INT21_FindFirstFCB(&context))
{
AL_reg(&context) = 0xff;
break;
}
/* else fall through */
case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
AL_reg(&context) = INT21_FindNextFCB(&context) ? 0x00 : 0xff;
break;
case 0x13: /* DELETE FILE USING FCB */
DeleteFileFCB(&context);
break;
case 0x17: /* RENAME FILE USING FCB */
RenameFileFCB(&context);
break;
case 0x19: /* GET CURRENT DEFAULT DRIVE */
AL_reg(&context) = DRIVE_GetCurrentDrive();
break;
case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
{
TDB *pTask = (TDB *)GlobalLock( GetCurrentTask() );
pTask->dta = MAKELONG( DX_reg(&context), DS_reg(&context) );
dprintf_int(stddeb, "int21: Set DTA: %08lx\n", pTask->dta);
}
break;
case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
DL_reg(&context) = 0;
if (!INT21_GetDriveAllocInfo(&context)) AX_reg(&context) = 0xffff;
break;
case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
if (!INT21_GetDriveAllocInfo(&context)) AX_reg(&context) = 0xffff;
break;
case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
GetDrivePB(&context, DRIVE_GetCurrentDrive());
break;
case 0x25: /* SET INTERRUPT VECTOR */
INT_SetHandler( AL_reg(&context),
MAKELONG( DX_reg(&context), DS_reg(&context) ) );
break;
case 0x2a: /* GET SYSTEM DATE */
GetSystemDate(&context);
break;
case 0x2b: /* SET SYSTEM DATE */
fprintf( stdnimp, "SetSystemDate(%02d/%02d/%04d): not allowed\n",
DL_reg(&context), DH_reg(&context), CX_reg(&context) );
AL_reg(&context) = 0; /* Let's pretend we succeeded */
break;
case 0x2c: /* GET SYSTEM TIME */
INT21_GetSystemTime(&context);
break;
case 0x2d: /* SET SYSTEM TIME */
fprintf( stdnimp, "SetSystemTime(%02d:%02d:%02d.%02d): not allowed\n",
CH_reg(&context), CL_reg(&context),
DH_reg(&context), DL_reg(&context) );
AL_reg(&context) = 0; /* Let's pretend we succeeded */
break;
case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */
{
TDB *pTask = (TDB *)GlobalLock( GetCurrentTask() );
ES_reg(&context) = SELECTOROF( pTask->dta );
BX_reg(&context) = OFFSETOF( pTask->dta );
}
break;
case 0x30: /* GET DOS VERSION */
AX_reg(&context) = DOSVERSION;
BX_reg(&context) = 0x0012; /* 0x123456 is Wine's serial # */
CX_reg(&context) = 0x3456;
break;
case 0x31: /* TERMINATE AND STAY RESIDENT */
INT_BARF( &context, 0x21 );
break;
case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
GetDrivePB(&context, DOS_GET_DRIVE( DL_reg(&context) ) );
break;
case 0x33: /* MULTIPLEXED */
switch (AL_reg(&context))
{
case 0x00: /* GET CURRENT EXTENDED BREAK STATE */
DL_reg(&context) = 0;
break;
case 0x01: /* SET EXTENDED BREAK STATE */
break;
case 0x02: /* GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE*/
DL_reg(&context) = 0;
break;
case 0x05: /* GET BOOT DRIVE */
DL_reg(&context) = 2;
/* c: is Wine's bootdrive */
break;
case 0x06: /* GET TRUE VERSION NUMBER */
BX_reg(&context) = DOSVERSION;
DX_reg(&context) = 0x00;
break;
default:
INT_BARF( &context, 0x21 );
break;
}
break;
case 0x34: /* GET ADDRESS OF INDOS FLAG */
ES_reg(&context) = DosHeapHandle;
BX_reg(&context) = (int)&heap->InDosFlag - (int)heap;
break;
case 0x35: /* GET INTERRUPT VECTOR */
{
SEGPTR addr = INT_GetHandler( AL_reg(&context) );
ES_reg(&context) = SELECTOROF(addr);
BX_reg(&context) = OFFSETOF(addr);
}
break;
case 0x36: /* GET FREE DISK SPACE */
if (!INT21_GetFreeDiskSpace(&context)) AX_reg(&context) = 0xffff;
break;
case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
AX_reg(&context) = 0x02; /* no country support available */
SET_CFLAG(&context);
break;
case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */
if (!FILE_MakeDir( PTR_SEG_OFF_TO_LIN( DS_reg(&context),
DX_reg(&context) )))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */
if (!FILE_RemoveDir( PTR_SEG_OFF_TO_LIN( DS_reg(&context),
DX_reg(&context) )))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
INT21_ChangeDir(&context);
break;
case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
AX_reg(&context) = _lcreat( PTR_SEG_OFF_TO_LIN( DS_reg(&context),
DX_reg(&context) ), CX_reg(&context) );
if (AX_reg(&context) == (WORD)HFILE_ERROR)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
OpenExistingFile(&context);
break;
case 0x3e: /* "CLOSE" - CLOSE FILE */
if ((AX_reg(&context) = _lclose( BX_reg(&context) )) != 0)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */
{
LONG result = _hread( BX_reg(&context),
(SEGPTR)MAKELONG( DX_reg(&context),
DS_reg(&context) ),
CX_reg(&context) );
if (result == -1)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
else AX_reg(&context) = (WORD)result;
}
break;
case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */
{
LONG result = _hwrite( BX_reg(&context),
PTR_SEG_OFF_TO_LIN( DS_reg(&context),
DX_reg(&context) ),
CX_reg(&context) );
if (result == -1)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
else AX_reg(&context) = (WORD)result;
}
break;
case 0x41: /* "UNLINK" - DELETE FILE */
if (!FILE_Unlink( PTR_SEG_OFF_TO_LIN( DS_reg(&context),
DX_reg(&context) )))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
{
LONG status = _llseek( BX_reg(&context),
MAKELONG(DX_reg(&context),CX_reg(&context)),
AL_reg(&context) );
if (status == HFILE_ERROR)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
break;
}
AX_reg(&context) = LOWORD(status);
DX_reg(&context) = HIWORD(status);
}
break;
case 0x43: /* FILE ATTRIBUTES */
switch (AL_reg(&context))
{
case 0x00:
if (!INT21_GetFileAttribute(&context))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x01:
RESET_CFLAG(&context);
break;
}
break;
case 0x44: /* IOCTL */
switch (AL_reg(&context))
{
case 0x00:
ioctlGetDeviceInfo(&context);
break;
case 0x01:
break;
case 0x08: /* Check if drive is removable. */
switch(GetDriveType( DOS_GET_DRIVE( BL_reg(&context) )))
{
case DRIVE_CANNOTDETERMINE:
DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
AX_reg(&context) = ER_InvalidDrive;
SET_CFLAG(&context);
break;
case DRIVE_REMOVABLE:
AX_reg(&context) = 0; /* removable */
break;
default:
AX_reg(&context) = 1; /* not removable */
break;
}
break;
case 0x09: /* CHECK IF BLOCK DEVICE REMOTE */
switch(GetDriveType( DOS_GET_DRIVE( BL_reg(&context) )))
{
case DRIVE_CANNOTDETERMINE:
DOS_ERROR( ER_InvalidDrive, EC_NotFound, SA_Abort, EL_Disk );
AX_reg(&context) = ER_InvalidDrive;
SET_CFLAG(&context);
break;
case DRIVE_REMOTE:
DX_reg(&context) = (1<<9) | (1<<12); /* remote */
break;
default:
DX_reg(&context) = 0; /* FIXME: use driver attr here */
break;
}
break;
case 0x0a: /* check if handle (BX) is remote */
/* returns DX, bit 15 set if remote, bit 14 set if date/time
* not set on close
*/
DX_reg(&context) = 0;
break;
case 0x0b: /* SET SHARING RETRY COUNT */
if (!CX_reg(&context))
{
AX_reg(&context) = 1;
SET_CFLAG(&context);
break;
}
sharing_pause = CX_reg(&context);
if (!DX_reg(&context))
sharing_retries = DX_reg(&context);
RESET_CFLAG(&context);
break;
case 0x0d:
ioctlGenericBlkDevReq(&context);
break;
case 0x0F: /* Set logical drive mapping */
/* FIXME: Not implemented at the moment, always returns error
*/
INT_BARF( &context, 0x21 );
AX_reg(&context) = 0x0001; /* invalid function */
SET_CFLAG(&context);
break;
default:
INT_BARF( &context, 0x21 );
break;
}
break;
case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */
if ((AX_reg(&context) = FILE_Dup(BX_reg(&context))) == (WORD)HFILE_ERROR)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
if (FILE_Dup2( BX_reg(&context), CX_reg(&context) ) == HFILE_ERROR)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
if (!INT21_GetCurrentDirectory(&context))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
else AX_reg(&context) = 0x0100;
/* intlist: many Microsoft products for Windows rely on this */
break;
case 0x48: /* ALLOCATE MEMORY */
case 0x49: /* FREE MEMORY */
case 0x4a: /* RESIZE MEMORY BLOCK */
INT_BARF( &context, 0x21 );
break;
case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
WinExec( PTR_SEG_OFF_TO_LIN( DS_reg(&context), DX_reg(&context) ),
SW_NORMAL );
break;
case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
TASK_KillCurrentTask( AL_reg(&context) );
break;
case 0x4d: /* GET RETURN CODE */
AX_reg(&context) = 0; /* normal exit */
break;
case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
if (!INT21_FindFirst(&context)) break;
/* fall through */
case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
if (!INT21_FindNext(&context))
{
DOS_ERROR( ER_NoMoreFiles, EC_MediaError, SA_Abort, EL_Disk );
AX_reg(&context) = ER_NoMoreFiles;
SET_CFLAG(&context);
}
break;
case 0x51: /* GET PSP ADDRESS */
case 0x62: /* GET PSP ADDRESS */
/* FIXME: should we return the original DOS PSP upon */
/* Windows startup ? */
BX_reg(&context) = GetCurrentPDB();
break;
case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
ES_reg(&context) = 0x0;
BX_reg(&context) = 0x0;
INT_BARF( &context, 0x21 );
break;
case 0x56: /* "RENAME" - RENAME FILE */
if (!INT21_RenameFile(&context))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x57: /* FILE DATE AND TIME */
switch (AL_reg(&context))
{
case 0x00:
if (!FILE_Fstat( BX_reg(&context), NULL, NULL,
&DX_reg(&context), &CX_reg(&context) ))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x01:
if (!INT21_SetFileDateTime(&context))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
}
break;
case 0x58: /* GET OR SET MEMORY/UMB ALLOCATION STRATEGY */
switch (AL_reg(&context))
{
case 0x00:
AX_reg(&context) = 1;
break;
case 0x02:
AX_reg(&context) = 0;
break;
case 0x01:
case 0x03:
break;
}
RESET_CFLAG(&context);
break;
case 0x5a: /* CREATE TEMPORARY FILE */
if (!INT21_CreateTempFile(&context))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x5b: /* CREATE NEW FILE */
if ((AX_reg(&context) = _lcreat_uniq( PTR_SEG_OFF_TO_LIN(DS_reg(&context),DX_reg(&context)), 0 )) == (WORD)HFILE_ERROR)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x5d: /* NETWORK */
case 0x5e:
/* network software not installed */
DOS_ERROR( ER_NoNetwork, EC_NotFound, SA_Abort, EL_Network );
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
break;
case 0x5f: /* NETWORK */
switch (AL_reg(&context))
{
case 0x07: /* ENABLE DRIVE */
if (!DRIVE_Enable( DL_reg(&context) ))
{
DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x08: /* DISABLE DRIVE */
if (!DRIVE_Disable( DL_reg(&context) ))
{
DOS_ERROR( ER_InvalidDrive, EC_MediaError, SA_Abort, EL_Disk );
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
default:
/* network software not installed */
DOS_ERROR( ER_NoNetwork, EC_NotFound, SA_Abort, EL_Network );
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
break;
}
break;
case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
{
const char *truename = DOSFS_GetDosTrueName( PTR_SEG_OFF_TO_LIN(DS_reg(&context),SI_reg(&context) ), FALSE );
if (!truename)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
else
{
lstrcpyn(PTR_SEG_OFF_TO_LIN(ES_reg(&context),DI_reg(&context)),
truename, 128 );
AX_reg(&context) = 0;
}
}
break;
case 0x61: /* UNUSED */
case 0x63: /* UNUSED */
case 0x64: /* OS/2 DOS BOX */
case 0x65: /* GET EXTENDED COUNTRY INFORMATION */
INT_BARF( &context, 0x21 );
break;
case 0x66: /* GLOBAL CODE PAGE TABLE */
switch (AL_reg(&context))
{
case 0x01:
DX_reg(&context) = BX_reg(&context) = CodePage;
RESET_CFLAG(&context);
break;
case 0x02:
CodePage = BX_reg(&context);
RESET_CFLAG(&context);
break;
}
break;
case 0x67: /* SET HANDLE COUNT */
SetHandleCount( BX_reg(&context) );
if (DOS_ExtendedError)
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x68: /* "FFLUSH" - COMMIT FILE */
case 0x6a: /* COMMIT FILE */
if (fsync( FILE_GetUnixTaskHandle( BX_reg(&context) )) == -1)
{
FILE_SetDosError();
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
break;
case 0x69: /* DISK SERIAL NUMBER */
switch (AL_reg(&context))
{
case 0x00:
if (!INT21_GetDiskSerialNumber(&context))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
else AX_reg(&context) = 0;
break;
case 0x01:
if (!INT21_SetDiskSerialNumber(&context))
{
AX_reg(&context) = DOS_ExtendedError;
SET_CFLAG(&context);
}
else AX_reg(&context) = 1;
break;
}
break;
case 0x6C: /* Extended Open/Create*/
ExtendedOpenCreateFile(&context);
break;
case 0x70: /* MS-DOS 7 (Windows95) - ??? (country-specific?)*/
case 0x71: /* MS-DOS 7 (Chicago) - LONG FILENAME FUNCTIONS */
case 0x72: /* MS-DOS 7 (Windows95) - ??? */
case 0x73: /* MS-DOS 7 (Windows95) - DRIVE LOCKING ??? */
dprintf_int(stddeb,"int21: windows95 function AX %04x\n",
AX_reg(&context));
dprintf_int(stddeb, " returning unimplemented\n");
SET_CFLAG(&context);
AL_reg(&context) = 0;
break;
case 0xdc: /* CONNECTION SERVICES - GET CONNECTION NUMBER */
case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */
break;
default:
INT_BARF( &context, 0x21 );
break;
}
dprintf_int( stddeb, "ret21: AX=%04x BX=%04x CX=%04x DX=%04x "
"SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
AX_reg(&context), BX_reg(&context), CX_reg(&context),
DX_reg(&context), SI_reg(&context), DI_reg(&context),
DS_reg(&context), ES_reg(&context), EFL_reg(&context));
}
BOOL INT21_Init(void)
{
if ((DosHeapHandle = GlobalAlloc(GMEM_FIXED,sizeof(struct DosHeap))) == 0)
{
fprintf( stderr, "INT21_Init: Out of memory\n");
return FALSE;
}
heap = (struct DosHeap *) GlobalLock(DosHeapHandle);
dpb = &heap->dpb;
dpbsegptr = MAKELONG( (int)&heap->dpb - (int)heap, DosHeapHandle );
heap->InDosFlag = 0;
strcpy(heap->biosdate, "01/01/80");
return TRUE;
}
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