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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 "windows.h"
#include "msdos.h"
#include "registers.h"
#include "ldt.h"
#include "task.h"
#include "options.h"
#include "miscemu.h"
#include "stddebug.h"
#include "debug.h"
/* 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 ExtendedError, CodePage = 437;
BYTE ErrorClass, Action, ErrorLocus;
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[];
static int Error(int e, int class, int el)
{
ErrorClass = class;
Action = SA_Ask4Retry;
ErrorLocus = el;
ExtendedError = e;
return e;
}
void errno_to_doserr(void)
{
switch (errno) {
case EAGAIN:
Error (ShareViolation, EC_Temporary, EL_Unknown);
break;
case EBADF:
Error (InvalidHandle, EC_AppError, EL_Unknown);
break;
case ENOSPC:
Error (DiskFull, EC_MediaError, EL_Disk);
break;
case EACCES:
case EPERM:
case EROFS:
Error (WriteProtected, EC_AccessDenied, EL_Unknown);
break;
case EBUSY:
Error (LockViolation, EC_AccessDenied, EL_Unknown);
break;
case ENOENT:
Error (FileNotFound, EC_NotFound, EL_Unknown);
break;
case EISDIR:
Error (CanNotMakeDir, EC_AccessDenied, EL_Unknown);
break;
case ENFILE:
case EMFILE:
Error (NoMoreFiles, EC_MediaError, EL_Unknown);
break;
case EEXIST:
Error (FileExists, EC_Exists, EL_Disk);
break;
default:
dprintf_int(stddeb, "int21: unknown errno %d!\n", errno);
Error (GeneralFailure, EC_SystemFailure, EL_Unknown);
break;
}
}
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 void GetFreeDiskSpace(struct sigcontext_struct *context)
{
int drive;
long size,available;
if (DL_reg(context) == 0) drive = DOS_GetDefaultDrive();
else drive = DL_reg(context) - 1;
if (!DOS_ValidDrive(drive)) {
Error(InvalidDrive, EC_MediaError , EL_Disk);
AX_reg(context) = 0xffff;
return;
}
if (!DOS_GetFreeSpace(drive, &size, &available)) {
Error(GeneralFailure, EC_MediaError , EL_Disk);
AX_reg(context) = 0xffff;
return;
}
AX_reg(context) = (drive < 2) ? 1 : 64; /* 64 for hard-disks, 1 for diskettes */
CX_reg(context) = 512;
BX_reg(context) = (available / (CX_reg(context) * AX_reg(context)));
DX_reg(context) = (size / (CX_reg(context) * AX_reg(context)));
Error (0,0,0);
}
static void GetDriveAllocInfo(struct sigcontext_struct *context)
{
int drive;
long size, available;
if (DL_reg(context) == 0) drive = DOS_GetDefaultDrive();
else drive = DL_reg(context) - 1;
if (!DOS_ValidDrive(drive))
{
AX_reg(context) = 4;
CX_reg(context) = 512;
DX_reg(context) = 0;
Error (InvalidDrive, EC_MediaError, EL_Disk);
return;
}
if (!DOS_GetFreeSpace(drive, &size, &available)) {
Error(GeneralFailure, EC_MediaError , EL_Disk);
AX_reg(context) = 0xffff;
return;
}
AX_reg(context) = (drive < 2) ? 1 : 64; /* 64 for hard-disks, 1 for diskettes */
CX_reg(context) = 512;
DX_reg(context) = (size / (CX_reg(context) * AX_reg(context)));
heap->mediaID = 0xf0;
DS_reg(context) = DosHeapHandle;
BX_reg(context) = (int)&heap->mediaID - (int)heap;
Error (0,0,0);
}
static void GetDrivePB(struct sigcontext_struct *context, int drive)
{
if(!DOS_ValidDrive(drive))
{
Error (InvalidDrive, EC_MediaError, 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 ReadFile(struct sigcontext_struct *context)
{
char *ptr;
int size;
/* can't read from stdout / stderr */
if ((BX_reg(context) == 1) || (BX_reg(context) == 2)) {
Error (InvalidHandle, EL_Unknown, EC_Unknown);
AX_reg(context) = InvalidHandle;
SET_CFLAG(context);
dprintf_int(stddeb, "int21: read (%d, void *, 0x%x) = EBADF\n",
BX_reg(context), CX_reg(context));
return;
}
ptr = PTR_SEG_OFF_TO_LIN (DS_reg(context),DX_reg(context));
if (BX_reg(context) == 0) {
*ptr = EOF;
Error (0,0,0);
AX_reg(context) = 1;
RESET_CFLAG(context);
dprintf_int(stddeb, "int21: read (%d, void *, 0x%x) = EOF\n",
BX_reg(context), CX_reg(context));
return;
} else {
size = read(BX_reg(context), ptr, CX_reg(context));
dprintf_int(stddeb, "int21: read (%d, void *, 0x%x) = 0x%x\n",
BX_reg(context), CX_reg(context), size);
if (size == -1) {
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
Error (0,0,0);
AX_reg(context) = size;
RESET_CFLAG(context);
}
}
static void WriteFile(struct sigcontext_struct *context)
{
char *ptr;
int x,size;
ptr = PTR_SEG_OFF_TO_LIN (DS_reg(context),DX_reg(context));
if (BX_reg(context) == 0) {
Error (InvalidHandle, EC_Unknown, EL_Unknown);
EAX_reg(context) = InvalidHandle;
SET_CFLAG(context);
return;
}
if (BX_reg(context) < 3) {
for (x = 0;x != CX_reg(context);x++) {
dprintf_int(stddeb, "%c", *ptr++);
}
fflush(stddeb);
Error (0,0,0);
AX_reg(context) = CX_reg(context);
RESET_CFLAG(context);
} else {
/* well, this function already handles everything we need */
size = _lwrite(BX_reg(context),ptr,CX_reg(context));
if (size == -1) { /* HFILE_ERROR == -1 */
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
Error (0,0,0);
AX_reg(context) = size;
RESET_CFLAG(context);
}
}
static void SeekFile(struct sigcontext_struct *context)
{
off_t status, fileoffset;
switch (AL_reg(context))
{
case 1: fileoffset = SEEK_CUR;
break;
case 2: fileoffset = SEEK_END;
break;
default:
case 0: fileoffset = SEEK_SET;
break;
}
status = lseek(BX_reg(context), (CX_reg(context) << 16) + DX_reg(context), fileoffset);
dprintf_int (stddeb, "int21: seek (%d, 0x%x, %d) = 0x%lx\n",
BX_reg(context), (CX_reg(context) << 16) + DX_reg(context), AL_reg(context), status);
if (status == -1)
{
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
Error (0,0,0);
AX_reg(context) = LOWORD(status);
DX_reg(context) = HIWORD(status);
RESET_CFLAG(context);
}
static void ioctlGetDeviceInfo(struct sigcontext_struct *context)
{
dprintf_int (stddeb, "int21: ioctl (%d, GetDeviceInfo)\n", BX_reg(context));
switch (BX_reg(context))
{
case 0:
case 1:
case 2:
DX_reg(context) = 0x80d0 | (1 << (BX_reg(context) != 0));
RESET_CFLAG(context);
break;
default:
{
struct stat sbuf;
if (fstat(BX_reg(context), &sbuf) < 0)
{
INT_BARF( context, 0x21 );
SET_CFLAG(context);
return;
}
DX_reg(context) = 0x0943;
/* 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;
if (BL_reg(context) == 0) drive = DOS_GetDefaultDrive();
else drive = BL_reg(context) - 1;
if (!DOS_ValidDrive(drive))
{
Error( FileNotFound, EC_NotFound, EL_Disk );
AX_reg(context) = FileNotFound;
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 GetSystemTime(struct sigcontext_struct *context)
{
struct tm *now;
struct timeval tv;
gettimeofday(&tv,NULL); /* Note use of gettimeofday(), instead of time() */
now = localtime(&tv.tv_sec);
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 GetExtendedErrorInfo(struct sigcontext_struct *context)
{
AX_reg(context) = ExtendedError;
BX_reg(context) = (ErrorClass << 8) | Action;
CH_reg(context) = ErrorLocus;
}
static void CreateFile(struct sigcontext_struct *context)
{
int handle;
handle = open(DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context))),
O_CREAT | O_TRUNC | O_RDWR, 0666 );
if (handle == -1) {
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
Error (0,0,0);
AX_reg(context) = handle;
RESET_CFLAG(context);
}
void OpenExistingFile(struct sigcontext_struct *context)
{
int handle;
int mode;
int lock;
switch (AX_reg(context) & 0x0007)
{
case 0:
mode = O_RDONLY;
break;
case 1:
mode = O_WRONLY;
break;
default:
mode = O_RDWR;
break;
}
if ((handle = open(DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context))),
mode)) == -1)
{
if( Options.allowReadOnly )
handle = open( DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context))),
O_RDONLY );
if( handle == -1 )
{
dprintf_int (stddeb, "int21: open (%s, %d) = -1\n",
DOS_GetUnixFileName(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context))), mode);
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
}
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;
{
result = flock(handle, lock | LOCK_NB);
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);
}
static void CloseFile(struct sigcontext_struct *context)
{
dprintf_int (stddeb, "int21: close (%d)\n", BX_reg(context));
if (close(BX_reg(context)) == -1)
{
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
Error (0,0,0);
AX_reg(context) = NoError;
RESET_CFLAG(context);
}
static void RenameFile(struct sigcontext_struct *context)
{
char *newname, *oldname;
/* 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 = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context)) );
newname = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(ES_reg(context),
DI_reg(context)) );
rename( oldname, newname);
RESET_CFLAG(context);
}
static void MakeDir(struct sigcontext_struct *context)
{
char *dirname;
dprintf_int(stddeb,"int21: makedir %s\n", (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) );
if ((dirname = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context)) ))== NULL) {
Error( CanNotMakeDir, EC_AccessDenied, EL_Disk );
AX_reg(context) = CanNotMakeDir;
SET_CFLAG(context);
return;
}
if (mkdir(dirname,0) == -1)
{
Error( CanNotMakeDir, EC_AccessDenied, EL_Disk );
AX_reg(context) = CanNotMakeDir;
SET_CFLAG(context);
return;
}
RESET_CFLAG(context);
}
static void ChangeDir(struct sigcontext_struct *context)
{
int drive;
char *dirname = PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context));
drive = DOS_GetDefaultDrive();
dprintf_int(stddeb,"int21: changedir %s\n", dirname);
if (dirname != NULL && dirname[1] == ':') {
drive = toupper(dirname[0]) - 'A';
dirname += 2;
}
if (!DOS_ChangeDir(drive, dirname))
{
SET_CFLAG(context);
AX_reg(context)=0x03;
}
}
static void RemoveDir(struct sigcontext_struct *context)
{
char *dirname;
dprintf_int(stddeb,"int21: removedir %s\n", (char *)PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) );
if ((dirname = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) ))== NULL) {
Error( PathNotFound, EC_NotFound, EL_Disk );
AX_reg(context) = PathNotFound;
SET_CFLAG(context);
return;
}
/*
if (strcmp(unixname,DosDrives[drive].CurrentDirectory)) {
AL = CanNotRemoveCwd;
SET_CFLAG(context);
}
*/
if (rmdir(dirname) == -1) {
Error( AccessDenied, EC_AccessDenied, EL_Disk );
AX_reg(context) = AccessDenied;
SET_CFLAG(context);
return;
}
RESET_CFLAG(context);
}
static void FindNext(struct sigcontext_struct *context)
{
struct dosdirent *dp;
struct tm *t;
BYTE *dta = GetCurrentDTA();
memcpy(&dp, dta+0x11, sizeof(dp));
dprintf_int(stddeb, "int21: FindNext, dta %p, dp %p\n", dta, dp);
do {
if ((dp = DOS_readdir(dp)) == NULL) {
Error(NoMoreFiles, EC_MediaError , EL_Disk);
AX_reg(context) = NoMoreFiles;
SET_CFLAG(context);
return;
}
} /* while (*(dta + 0x0c) != dp->attribute);*/
while ( ( dp->search_attribute & dp->attribute) != dp->attribute);
*(dta + 0x15) = dp->attribute;
setword(&dta[0x0d], dp->entnum);
t = localtime(&(dp->filetime));
setword(&dta[0x16], (t->tm_hour << 11) + (t->tm_min << 5) +
(t->tm_sec / 2)); /* time */
setword(&dta[0x18], ((t->tm_year - 80) << 9) + (t->tm_mon << 5) +
(t->tm_mday)); /* date */
setdword(&dta[0x1a], dp->filesize);
strncpy(dta + 0x1e, dp->filename, 13);
AX_reg(context) = 0;
RESET_CFLAG(context);
dprintf_int(stddeb, "int21: FindNext -- (%s) index=%d size=%ld\n", dp->filename, dp->entnum, dp->filesize);
return;
}
static void FindFirst(struct sigcontext_struct *context)
{
BYTE drive, *path = PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context));
struct dosdirent *dp;
BYTE *dta = GetCurrentDTA();
dprintf_int(stddeb, "int21: FindFirst path = %s\n", path);
if ((*path)&&(path[1] == ':')) {
drive = (islower(*path) ? toupper(*path) : *path) - 'A';
if (!DOS_ValidDrive(drive)) {
Error(InvalidDrive, EC_MediaError , EL_Disk);
AX_reg(context) = InvalidDrive;
SET_CFLAG(context);
return;
}
} else
drive = DOS_GetDefaultDrive();
*dta = drive;
memset(dta + 1 , '?', 11);
*(dta + 0x0c) = ECX_reg(context) & (FA_LABEL | FA_DIREC);
if ((dp = DOS_opendir(path)) == NULL) {
Error(PathNotFound, EC_MediaError, EL_Disk);
AX_reg(context) = FileNotFound;
SET_CFLAG(context);
return;
}
dp->search_attribute = ECX_reg(context) & (FA_LABEL | FA_DIREC);
memcpy(dta + 0x11, &dp, sizeof(dp));
FindNext(context);
}
static void GetFileDateTime(struct sigcontext_struct *context)
{
struct stat filestat;
struct tm *now;
fstat( BX_reg(context), &filestat );
now = localtime (&filestat.st_mtime);
CX_reg(context) = ((now->tm_hour * 0x2000) + (now->tm_min * 0x20) + now->tm_sec/2);
DX_reg(context) = (((now->tm_year + 1900 - 1980) * 0x200) +
(now->tm_mon * 0x20) + now->tm_mday);
RESET_CFLAG(context);
}
static void SetFileDateTime(struct sigcontext_struct *context)
{
char *filename;
struct utimbuf filetime;
/* FIXME: Argument isn't the name of the file in DS:DX,
but the file handle in BX */
filename = DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),
DX_reg(context)) );
filetime.actime = 0L;
filetime.modtime = filetime.actime;
utime(filename, &filetime);
RESET_CFLAG(context);
}
static void CreateTempFile(struct sigcontext_struct *context)
{
char temp[256];
int handle;
sprintf(temp,"%s\\win%d.tmp",TempDirectory,(int) getpid());
dprintf_int(stddeb,"CreateTempFile %s\n",temp);
handle = open(DOS_GetUnixFileName(temp), O_CREAT | O_TRUNC | O_RDWR, 0666);
if (handle == -1) {
Error( WriteProtected, EC_AccessDenied, EL_Disk );
AX_reg(context) = WriteProtected;
SET_CFLAG(context);
return;
}
strcpy(PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)), temp);
AX_reg(context) = handle;
RESET_CFLAG(context);
}
static void CreateNewFile(struct sigcontext_struct *context)
{
int handle;
if ((handle = open(DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(context),DX_reg(context)) ),
O_CREAT | O_EXCL | O_RDWR, 0666)) == -1)
{
Error( WriteProtected, EC_AccessDenied, EL_Disk );
AX_reg(context) = WriteProtected;
SET_CFLAG(context);
return;
}
AX_reg(context) = handle;
RESET_CFLAG(context);
}
static void GetCurrentDirectory(struct sigcontext_struct *context)
{
int drive;
if (DL_reg(context) == 0) drive = DOS_GetDefaultDrive();
else drive = DL_reg(context) - 1;
if (!DOS_ValidDrive(drive))
{
Error( InvalidDrive, EC_NotFound, EL_Disk );
AX_reg(context) = InvalidDrive;
SET_CFLAG(context);
return;
}
strcpy(PTR_SEG_OFF_TO_LIN(DS_reg(context),SI_reg(context)),
DOS_GetCurrentDir(drive) );
RESET_CFLAG(context);
}
static void GetDiskSerialNumber(struct sigcontext_struct *context)
{
int drive;
BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
DWORD serialnumber;
if (BL_reg(context) == 0) drive = DOS_GetDefaultDrive();
else drive = BL_reg(context) - 1;
if (!DOS_ValidDrive(drive))
{
Error( InvalidDrive, EC_NotFound, EL_Disk );
AX_reg(context) = InvalidDrive;
SET_CFLAG(context);
return;
}
DOS_GetSerialNumber(drive, &serialnumber);
setword(dataptr, 0);
setdword(&dataptr[2], serialnumber);
strncpy(dataptr + 6, DOS_GetVolumeLabel(drive), 8);
strncpy(dataptr + 0x11, "FAT16 ", 8);
AX_reg(context) = 0;
RESET_CFLAG(context);
}
static void SetDiskSerialNumber(struct sigcontext_struct *context)
{
int drive;
BYTE *dataptr = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
DWORD serialnumber;
if (BL_reg(context) == 0) drive = DOS_GetDefaultDrive();
else drive = BL_reg(context) - 1;
if (!DOS_ValidDrive(drive))
{
Error( InvalidDrive, EC_NotFound, EL_Disk );
AX_reg(context) = InvalidDrive;
SET_CFLAG(context);
return;
}
serialnumber = dataptr[1] + (dataptr[2] << 8) + (dataptr[3] << 16) +
(dataptr[4] << 24);
DOS_SetSerialNumber(drive, serialnumber);
AX_reg(context) = 1;
RESET_CFLAG(context);
}
static void DumpFCB(BYTE *fcb)
{
int x, y;
fcb -= 7;
for (y = 0; y !=2 ; y++) {
for (x = 0; x!=15;x++)
dprintf_int(stddeb, "%02x ", *fcb++);
dprintf_int(stddeb,"\n");
}
}
/* microsoft's programmers should be shot for using CP/M style int21
calls in Windows for Workgroup's winfile.exe */
static void FindFirstFCB(struct sigcontext_struct *context)
{
BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
struct fcb *standard_fcb;
struct fcb *output_fcb;
int drive;
char path[12];
BYTE *dta = GetCurrentDTA();
DumpFCB( fcb );
if ((*fcb) == 0xff)
{
standard_fcb = (struct fcb *)(fcb + 7);
output_fcb = (struct fcb *)(dta + 7);
*dta = 0xff;
}
else
{
standard_fcb = (struct fcb *)fcb;
output_fcb = (struct fcb *)dta;
}
if (standard_fcb->drive)
{
drive = standard_fcb->drive - 1;
if (!DOS_ValidDrive(drive))
{
Error (InvalidDrive, EC_MediaError, EL_Disk);
AX_reg(context) = 0xff;
return;
}
}
else
drive = DOS_GetDefaultDrive();
output_fcb->drive = drive;
if (*(fcb) == 0xff)
{
if (*(fcb+6) & FA_LABEL) /* return volume label */
{
*(dta+6) = FA_LABEL;
memset(&output_fcb->name, ' ', 11);
if (DOS_GetVolumeLabel(drive) != NULL)
{
strncpy(output_fcb->name, DOS_GetVolumeLabel(drive), 11);
AX_reg(context) = 0x00;
return;
}
}
}
strncpy(output_fcb->name, standard_fcb->name, 11);
if (*fcb == 0xff)
*(dta+6) = ( *(fcb+6) & (!FA_DIREC));
sprintf(path,"%c:*.*",drive+'A');
if ((output_fcb->directory = DOS_opendir(path))==NULL)
{
Error (PathNotFound, EC_MediaError, EL_Disk);
AX_reg(context) = 0xff;
return;
}
}
static void DeleteFileFCB(struct sigcontext_struct *context)
{
BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
int drive;
struct dosdirent *dp;
char temp[256], *ptr;
DumpFCB( fcb );
if (*fcb)
drive = *fcb - 1;
else
drive = DOS_GetDefaultDrive();
strcpy(temp, DOS_GetCurrentDir(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;
}
strcpy(temp, DOS_GetCurrentDir(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;
}
static void RenameFileFCB(struct sigcontext_struct *context)
{
BYTE *fcb = PTR_SEG_OFF_TO_LIN(DS_reg(context), DX_reg(context));
int drive;
struct dosdirent *dp;
char temp[256], oldname[256], newname[256], *oldnameptr, *newnameptr;
DumpFCB( fcb );
if (*fcb)
drive = *fcb - 1;
else
drive = DOS_GetDefaultDrive();
strcpy(temp, DOS_GetCurrentDir(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;
}
strcpy(oldname, DOS_GetCurrentDir(drive) );
strcat(oldname, "\\");
oldnameptr = oldname + strlen(oldname);
strcpy(newname, DOS_GetCurrentDir(drive) );
strcat(newname, "\\");
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;
}
static void fLock (struct sigcontext_struct * context)
{
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)
{
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
Error (0,0,0);
RESET_CFLAG(context);
}
static void GetFileAttribute (struct sigcontext_struct * context)
{
char *filename = PTR_SEG_OFF_TO_LIN (DS_reg(context),DX_reg(context));
struct stat s;
int res;
res = stat(DOS_GetUnixFileName(filename), &s);
if (res==-1)
{
errno_to_doserr();
AX_reg(context) = ExtendedError;
SET_CFLAG(context);
return;
}
CX_reg(context) = 0;
if (S_ISDIR(s.st_mode))
CX_reg(context) |= 0x10;
if ((S_IWRITE & s.st_mode) != S_IWRITE)
CX_reg(context) |= 0x01;
dprintf_int (stddeb, "int21: GetFileAttributes (%s) = 0x%x\n",
filename, CX_reg(context) );
RESET_CFLAG(context);
Error (0,0,0);
}
extern void LOCAL_PrintHeap (WORD ds);
/***********************************************************************
* DOS3Call (KERNEL.102)
*/
void DOS3Call( struct sigcontext_struct context )
{
int drive;
if (AH_reg(&context) == 0x59)
{
GetExtendedErrorInfo(&context);
return;
}
else
{
Error (0,0,0);
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 0x12: /* FIND NEXT MATCHING 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 */
INT_BARF( &context, 0x21 );
break;
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 */
if (!DOS_ValidDrive(DL_reg(&context)))
Error (InvalidDrive, EC_MediaError, EL_Disk);
else
{
DOS_SetDefaultDrive(DL_reg(&context));
Error(0,0,0);
}
AL_reg(&context) = MAX_DOS_DRIVES;
break;
case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
FindFirstFCB(&context);
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) = DOS_GetDefaultDrive();
Error (0,0,0);
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;
GetDriveAllocInfo(&context);
break;
case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
GetDriveAllocInfo(&context);
break;
case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
GetDrivePB(&context, DOS_GetDefaultDrive());
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 */
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, (DL_reg(&context) == 0) ?
(DOS_GetDefaultDrive()) : (DL_reg(&context)-1));
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 */
GetFreeDiskSpace(&context);
break;
case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
AX_reg(&context) = 0x02; /* no country support available */
SET_CFLAG(&context);
break;
case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */
MakeDir(&context);
break;
case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */
RemoveDir(&context);
break;
case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
ChangeDir(&context);
break;
case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
CreateFile(&context);
break;
case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
OpenExistingFile(&context);
break;
case 0x3e: /* "CLOSE" - CLOSE FILE */
CloseFile(&context);
break;
case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */
ReadFile(&context);
break;
case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */
WriteFile(&context);
break;
case 0x41: /* "UNLINK" - DELETE FILE */
if (unlink( DOS_GetUnixFileName( PTR_SEG_OFF_TO_LIN(DS_reg(&context),DX_reg(&context))) ) == -1) {
errno_to_doserr();
AX_reg(&context) = ExtendedError;
SET_CFLAG(&context);
break;
}
Error(0,0,0);
RESET_CFLAG(&context);
break;
case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
SeekFile(&context);
break;
case 0x43: /* FILE ATTRIBUTES */
switch (AL_reg(&context))
{
case 0x00:
GetFileAttribute(&context);
break;
case 0x01:
RESET_CFLAG(&context);
break;
}
break;
case 0x44: /* IOCTL */
switch (AL_reg(&context))
{
case 0x00:
ioctlGetDeviceInfo(&context);
break;
case 0x08: /* Check if drive is removable. */
drive = BL_reg(&context) ? (BL_reg(&context) - 1)
: DOS_GetDefaultDrive();
if(!DOS_ValidDrive(drive))
{
Error( InvalidDrive, EC_NotFound, EL_Disk );
AX_reg(&context) = InvalidDrive;
SET_CFLAG(&context);
}
else
{
if (drive > 1)
AX_reg(&context) = 1; /* not removable */
else
AX_reg(&context) = 0; /* removable */
RESET_CFLAG(&context);
}
break;
case 0x09: /* CHECK IF BLOCK DEVICE REMOTE */
drive = BL_reg(&context) ? (BL_reg(&context) - 1)
: DOS_GetDefaultDrive();
if(!DOS_ValidDrive(drive))
{
Error( InvalidDrive, EC_NotFound, EL_Disk );
AX_reg(&context) = InvalidDrive;
SET_CFLAG(&context);
}
else
{
DX_reg(&context) = (1<<9) | (1<<12) | (1<<15);
RESET_CFLAG(&context);
}
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;
RESET_CFLAG(&context);
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
*/
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) = dup(BX_reg(&context))) == 0xffff)
{
errno_to_doserr();
AX_reg(&context) = ExtendedError;
SET_CFLAG(&context);
}
else RESET_CFLAG(&context);
break;
case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
if (dup2( BX_reg(&context), CX_reg(&context) ) == -1)
{
errno_to_doserr();
AX_reg(&context) = ExtendedError;
SET_CFLAG(&context);
}
else RESET_CFLAG(&context);
break;
case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
GetCurrentDirectory(&context);
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) = NoError; /* normal exit */
break;
case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
FindFirst(&context);
break;
case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
FindNext(&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 */
RenameFile(&context);
break;
case 0x57: /* FILE DATE AND TIME */
switch (AL_reg(&context))
{
case 0x00:
GetFileDateTime(&context);
break;
case 0x01:
SetFileDateTime(&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 */
CreateTempFile(&context);
break;
case 0x5b: /* CREATE NEW FILE */
CreateNewFile(&context);
break;
case 0x5d: /* NETWORK */
case 0x5e:
/* network software not installed */
AX_reg(&context) = NoNetwork;
SET_CFLAG(&context);
break;
case 0x5f: /* NETWORK */
switch (AL_reg(&context))
{
case 0x07: /* ENABLE DRIVE */
if (!DOS_EnableDrive(DL_reg(&context)))
{
Error(InvalidDrive, EC_MediaError , EL_Disk);
AX_reg(&context) = InvalidDrive;
SET_CFLAG(&context);
break;
}
else
{
RESET_CFLAG(&context);
break;
}
case 0x08: /* DISABLE DRIVE */
if (!DOS_DisableDrive(DL_reg(&context)))
{
Error(InvalidDrive, EC_MediaError , EL_Disk);
AX_reg(&context) = InvalidDrive;
SET_CFLAG(&context);
break;
}
else
{
RESET_CFLAG(&context);
break;
}
default:
/* network software not installed */
AX_reg(&context) = NoNetwork;
SET_CFLAG(&context);
break;
}
break;
case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
strncpy(PTR_SEG_OFF_TO_LIN(ES_reg(&context),DI_reg(&context)),
PTR_SEG_OFF_TO_LIN(DS_reg(&context),SI_reg(&context)),
strlen(PTR_SEG_OFF_TO_LIN(DS_reg(&context),SI_reg(&context))) & 0x7f);
RESET_CFLAG(&context);
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 */
RESET_CFLAG(&context);
break;
case 0x68: /* "FFLUSH" - COMMIT FILE */
case 0x6a: /* COMMIT FILE */
fsync( BX_reg(&context) );
RESET_CFLAG(&context);
break;
case 0x69: /* DISK SERIAL NUMBER */
switch (AL_reg(&context))
{
case 0x00:
GetDiskSerialNumber(&context);
break;
case 0x01:
SetDiskSerialNumber(&context);
break;
}
break;
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));
}
void INT21_Init(void)
{
if ((DosHeapHandle = GlobalAlloc(GMEM_FIXED,sizeof(struct DosHeap))) == 0)
{
fprintf( stderr, "INT21_Init: Out of memory\n");
exit(1);
}
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");
}
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