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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 "regfunc.h"
#include "windows.h"
#include "heap.h"
#include "msdos.h"
#include "registers.h"
#include "options.h"
#include "miscemu.h"
#include "stddebug.h"
/* #define DEBUG_INT */
#include "debug.h"
WORD ExtendedError, CodePage = 437;
BYTE ErrorClass, Action, ErrorLocus;
BYTE *dta;
struct DosHeap {
BYTE dta[256];
BYTE InDosFlag;
BYTE biosdate[8];
};
static struct DosHeap *heap;
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:
fprintf(stderr, "int21: unknown errno %d!\n", errno);
Error (GeneralFailure, EC_SystemFailure, EL_Unknown);
break;
}
}
/*
static void Barf(struct sigcontext_struct *context)
{
fprintf(stdnimp, "int21: unknown/not implemented parameters:\n");
fprintf(stdnimp, "int21: AX %04x, BX %04x, CX %04x, DX %04x, "
"SI %04x, DI %04x, DS %04x, ES %04x\n",
AX, BX, CX, DX, SI, DI, DS, ES);
}
*/
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 == 0)
drive = DOS_GetDefaultDrive();
else
drive = DL - 1;
if (!DOS_ValidDrive(drive)) {
Error(InvalidDrive, EC_MediaError , EL_Disk);
AX = 0xffff;
return;
}
if (!DOS_GetFreeSpace(drive, &size, &available)) {
Error(GeneralFailure, EC_MediaError , EL_Disk);
AX = 0xffff;
return;
}
AX = 4;
CX = 512;
BX = (available / (CX * AX));
DX = (size / (CX * AX));
Error (0,0,0);
}
static void GetDriveAllocInfo(struct sigcontext_struct *context)
{
long size, available;
BYTE mediaID;
if (!DOS_ValidDrive(DL)) {
AX = 4;
CX = 512;
DX = 0;
Error (InvalidDrive, EC_MediaError, EL_Disk);
return;
}
if (!DOS_GetFreeSpace(DL, &size, &available)) {
Error(GeneralFailure, EC_MediaError , EL_Disk);
AX = 0xffff;
return;
}
EAX = 4;
ECX = 512;
EDX = (size / (CX * AX));
mediaID = 0xf0;
DS = segment(mediaID);
BX = offset(mediaID);
Error (0,0,0);
}
static void GetDefDriveAllocInfo(struct sigcontext_struct *context)
{
DX = DOS_GetDefaultDrive();
GetDriveAllocInfo(context);
}
static void GetDrivePB(struct sigcontext_struct *context)
{
Error (InvalidDrive, EC_MediaError, EL_Disk);
AX = 0x00ff;
/* I'm sorry but I only got networked drives :-) */
}
static void ReadFile(struct sigcontext_struct *context)
{
char *ptr;
int size;
/* can't read from stdout / stderr */
if ((BX == 1) || (BX == 2)) {
Error (InvalidHandle, EL_Unknown, EC_Unknown);
AX = InvalidHandle;
SetCflag;
return;
}
ptr = SAFEMAKEPTR (DS,DX);
if (BX == 0) {
*ptr = EOF;
Error (0,0,0);
AX = 1;
ResetCflag;
return;
} else {
size = read(BX, ptr, CX);
if (size == -1) {
errno_to_doserr();
AL = ExtendedError;
SetCflag;
return;
}
Error (0,0,0);
AX = size;
ResetCflag;
}
}
static void WriteFile(struct sigcontext_struct *context)
{
char *ptr;
int x,size;
ptr = SAFEMAKEPTR (DS,DX);
if (BX == 0) {
Error (InvalidHandle, EC_Unknown, EL_Unknown);
EAX = InvalidHandle;
SetCflag;
return;
}
if (BX < 3) {
for (x = 0;x != CX;x++) {
dprintf_int(stddeb, "%c", *ptr++);
}
fflush(stddeb);
Error (0,0,0);
AL = CX;
ResetCflag;
} else {
size = write(BX, ptr , CX);
if (size == 0) {
Error (WriteFault, EC_Unknown, EL_Unknown);
AL = ExtendedError;
return;
}
if (size == -1) {
errno_to_doserr();
AL = ExtendedError;
SetCflag;
return;
}
Error (0,0,0);
AX = size;
ResetCflag;
}
}
static void SeekFile(struct sigcontext_struct *context)
{
off_t status, fileoffset;
switch (AL) {
case 1: fileoffset = SEEK_CUR;
break;
case 2: fileoffset = SEEK_END;
break;
default:
case 0: fileoffset = SEEK_SET;
break;
}
status = lseek(BX, (CX << 16) + DX, fileoffset);
if (status == -1) {
errno_to_doserr();
AL = ExtendedError; SetCflag;
return;
}
Error (0,0,0);
AX = (status & 0xffff);
DX = ((status >> 16) & 0xffff);
ResetCflag;
}
static void ioctlGetDeviceInfo(struct sigcontext_struct *context)
{
switch (BX) {
case 0:
case 1:
case 2:
DX = 0x80d3;
break;
default:
{
struct stat sbuf;
if (fstat(BX, &sbuf) < 0)
{
IntBarf(0x21, context);
DX = 0x50;
SetCflag;
return;
}
/* This isn't the right answer, but should be close enough. */
DX = 0x0943;
}
}
ResetCflag;
}
static void ioctlGenericBlkDevReq(struct sigcontext_struct *context)
{
BYTE *dataptr = SAFEMAKEPTR(DS, DX);
int drive;
if (BL == 0)
drive = DOS_GetDefaultDrive();
else
drive = BL - 1;
if (!DOS_ValidDrive(drive)) {
AX = 0x02;
SetCflag;
return;
}
if (CH != 0x08) {
IntBarf(0x21, context);
return;
}
switch (CL) {
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]);
ResetCflag;
return;
default:
IntBarf(0x21, context);
}
}
static void GetSystemDate(struct sigcontext_struct *context)
{
struct tm *now;
time_t ltime;
ltime = time(NULL);
now = localtime(&ltime);
CX = now->tm_year + 1900;
DX = ((now->tm_mon + 1) << 8) | now->tm_mday;
AX = 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 = (now->tm_hour<<8) | now->tm_min;
DX = (now->tm_sec<<8) | tv.tv_usec/10000;
/* Note hundredths of seconds */
}
static void GetExtendedErrorInfo(struct sigcontext_struct *context)
{
AL = ExtendedError;
BX = (ErrorClass << 8) | Action;
CH = ErrorLocus << 8;
}
static void CreateFile(struct sigcontext_struct *context)
{
int handle;
if ((handle = open(DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX)),
O_CREAT | O_TRUNC | O_RDWR )) == -1) {
errno_to_doserr();
AL = ExtendedError;
SetCflag;
return;
}
Error (0,0,0);
EAX = (EAX & 0xffff0000) | handle;
ResetCflag;
}
void OpenExistingFile(struct sigcontext_struct *context)
{
int handle;
int mode;
int lock;
switch (AX & 0x0007)
{
case 0:
mode = O_RDONLY;
break;
case 1:
mode = O_WRONLY;
break;
default:
mode = O_RDWR;
break;
}
if ((handle = open(DOS_GetUnixFileName(SAFEMAKEPTR(DS,DX)), mode)) == -1) {
errno_to_doserr();
AL = ExtendedError;
SetCflag;
return;
}
switch (AX & 0x0070)
{
case 0x00: /* compatability mode */
case 0x40: /* DENYNONE */
lock = -1;
break;
case 0x30: /* DENYREAD */
dprintf_int(stdnimp,
"OpenExistingFile (%s): DENYREAD changed to DENYALL\n",
(char *)SAFEMAKEPTR(DS,DX));
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();
EAX = (EAX & 0xffffff00) | ExtendedError;
close(handle);
SetCflag;
return;
}
}
Error (0,0,0);
EAX = (EAX & 0xffff0000) | handle;
ResetCflag;
}
static void CloseFile(struct sigcontext_struct *context)
{
if (close(BX) == -1) {
errno_to_doserr();
AL = ExtendedError;
SetCflag;
return;
}
Error (0,0,0);
AL = NoError;
ResetCflag;
}
static void RenameFile(struct sigcontext_struct *context)
{
char *newname, *oldname;
dprintf_int(stddeb,"int21: renaming %s to %s\n",
(char *)SAFEMAKEPTR(DS,DX), (char *)SAFEMAKEPTR(ES,DI) );
oldname = DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX) );
newname = DOS_GetUnixFileName( SAFEMAKEPTR(ES,DI) );
rename( oldname, newname);
ResetCflag;
}
static void MakeDir(struct sigcontext_struct *context)
{
char *dirname;
dprintf_int(stddeb,"int21: makedir %s\n", (char *)SAFEMAKEPTR(DS,DX) );
if ((dirname = DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX) ))== NULL) {
AL = CanNotMakeDir;
SetCflag;
return;
}
if (mkdir(dirname,0) == -1) {
AL = CanNotMakeDir;
SetCflag;
return;
}
ResetCflag;
}
static void ChangeDir(struct sigcontext_struct *context)
{
int drive;
char *dirname = SAFEMAKEPTR(DS,DX);
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))
{
SetCflag;
AX=0x03;
}
}
static void RemoveDir(struct sigcontext_struct *context)
{
char *dirname;
dprintf_int(stddeb,"int21: removedir %s\n", (char *)SAFEMAKEPTR(DS,DX) );
if ((dirname = DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX) ))== NULL) {
AL = CanNotMakeDir;
SetCflag;
return;
}
/*
if (strcmp(unixname,DosDrives[drive].CurrentDirectory)) {
AL = CanNotRemoveCwd;
SetCflag;
}
*/
if (rmdir(dirname) == -1) {
AL = CanNotMakeDir;
SetCflag;
}
ResetCflag;
}
static void ExecProgram(struct sigcontext_struct *context)
{
execl("wine", DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX)) );
}
static void FindNext(struct sigcontext_struct *context)
{
struct dosdirent *dp;
memcpy(&dp, dta+0x0d, sizeof(dp));
do {
if ((dp = DOS_readdir(dp)) == NULL) {
Error(NoMoreFiles, EC_MediaError , EL_Disk);
AL = NoMoreFiles;
SetCflag;
return;
}
} /* while (*(dta + 0x0c) != dp->attribute);*/
while ( ( dp->search_attribute & dp->attribute) != dp->attribute);
*(dta + 0x15) = dp->attribute;
setword(&dta[0x16], 0x1234); /* time */
setword(&dta[0x18], 0x1234); /* date */
setdword(&dta[0x1a], dp->filesize);
strncpy(dta + 0x1e, dp->filename, 13);
AL = 0;
ResetCflag;
return;
}
static void FindFirst(struct sigcontext_struct *context)
{
BYTE drive, *path = SAFEMAKEPTR(DS, DX);
struct dosdirent *dp;
if ((*path)&&(path[1] == ':')) {
drive = (islower(*path) ? toupper(*path) : *path) - 'A';
if (!DOS_ValidDrive(drive)) {
Error(InvalidDrive, EC_MediaError , EL_Disk);
AL = InvalidDrive;
SetCflag;
return;
}
} else
drive = DOS_GetDefaultDrive();
*dta = drive;
memset(dta + 1 , '?', 11);
*(dta + 0x0c) = ECX & (FA_LABEL | FA_DIREC);
if (ECX & FA_LABEL) {
/* return volume label */
if (DOS_GetVolumeLabel(drive) != NULL)
strncpy(dta + 0x1e, DOS_GetVolumeLabel(drive), 8);
AL = 0;
ResetCflag;
return;
}
if ((dp = DOS_opendir(path)) == NULL) {
Error(PathNotFound, EC_MediaError, EL_Disk);
AL = FileNotFound;
SetCflag;
return;
}
dp->search_attribute = ECX & (FA_LABEL | FA_DIREC);
memcpy(dta + 0x0d, &dp, sizeof(dp));
FindNext(context);
}
static void GetFileDateTime(struct sigcontext_struct *context)
{
char *filename;
struct stat filestat;
struct tm *now;
if ((filename = DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX) ))== NULL) {
AL = FileNotFound;
SetCflag;
return;
}
stat(filename, &filestat);
now = localtime (&filestat.st_mtime);
CX = ((now->tm_hour * 0x2000) + (now->tm_min * 0x20) + now->tm_sec/2);
DX = ((now->tm_year * 0x200) + (now->tm_mon * 0x20) + now->tm_mday);
ResetCflag;
}
static void SetFileDateTime(struct sigcontext_struct *context)
{
char *filename;
struct utimbuf filetime;
filename = DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX) );
filetime.actime = 0L;
filetime.modtime = filetime.actime;
utime(filename, &filetime);
ResetCflag;
}
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);
if (handle == -1) {
AL = WriteProtected;
SetCflag;
return;
}
strcpy(SAFEMAKEPTR(DS,DX), temp);
AX = handle;
ResetCflag;
}
static void CreateNewFile(struct sigcontext_struct *context)
{
int handle;
if ((handle = open(DOS_GetUnixFileName( SAFEMAKEPTR(DS,DX) ), O_CREAT | O_EXCL | O_RDWR)) == -1) {
AL = WriteProtected;
SetCflag;
return;
}
AX = handle;
ResetCflag;
}
static void GetCurrentDirectory(struct sigcontext_struct *context)
{
int drive;
if (DL == 0)
drive = DOS_GetDefaultDrive();
else
drive = DL - 1;
if (!DOS_ValidDrive(drive)) {
AL = InvalidDrive;
SetCflag;
return;
}
strcpy(SAFEMAKEPTR(DS,SI), DOS_GetCurrentDir(drive) );
ResetCflag;
}
static void GetDiskSerialNumber(struct sigcontext_struct *context)
{
int drive;
BYTE *dataptr = SAFEMAKEPTR(DS, DX);
DWORD serialnumber;
if (BL == 0)
drive = DOS_GetDefaultDrive();
else
drive = BL - 1;
if (!DOS_ValidDrive(drive)) {
AL =InvalidDrive;
SetCflag;
return;
}
DOS_GetSerialNumber(drive, &serialnumber);
setword(dataptr, 0);
setdword(&dataptr[2], serialnumber);
strncpy(dataptr + 6, DOS_GetVolumeLabel(drive), 8);
strncpy(dataptr + 0x11, "FAT16 ", 8);
AL = 0;
ResetCflag;
}
static void SetDiskSerialNumber(struct sigcontext_struct *context)
{
int drive;
BYTE *dataptr = SAFEMAKEPTR(DS, DX);
DWORD serialnumber;
if (BL == 0)
drive = DOS_GetDefaultDrive();
else
drive = BL - 1;
if (!DOS_ValidDrive(drive)) {
AL = InvalidDrive;
SetCflag;
return;
}
serialnumber = dataptr[1] + (dataptr[2] << 8) + (dataptr[3] << 16) +
(dataptr[4] << 24);
DOS_SetSerialNumber(drive, serialnumber);
AL = 1L;
ResetCflag;
}
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 = SAFEMAKEPTR(DS, DX);
struct fcb *standard_fcb;
struct fcb *output_fcb;
int drive;
char path[12];
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);
AL = 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);
AL = 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);
AL = 0xff;
return;
}
}
static void DeleteFileFCB(struct sigcontext_struct *context)
{
BYTE *fcb = SAFEMAKEPTR(DS, DX);
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);
AL = 0xffL;
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);
AL = 0;
}
static void RenameFileFCB(struct sigcontext_struct *context)
{
BYTE *fcb = SAFEMAKEPTR(DS, DX);
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);
AL = 0xffL;
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);
AL = 0;
}
static void fLock (struct sigcontext_struct * context)
{
struct flock f;
int result,retries=sharing_retries;
f.l_start = MAKELONG(DX,CX);
f.l_len = MAKELONG(DI,SI);
f.l_whence = 0;
f.l_pid = 0;
switch ( AX & 0xff )
{
case 0x00: /* LOCK */
f.l_type = F_WRLCK;
break;
case 0x01: /* UNLOCK */
f.l_type = F_UNLCK;
break;
default:
EAX = (EAX & 0xffff0000) | 0x0001;
SetCflag;
return;
}
{
result = fcntl(BX,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();
EAX = (EAX & 0xffffff00) | ExtendedError;
SetCflag;
return;
}
Error (0,0,0);
ResetCflag;
}
static void GetFileAttribute (struct sigcontext_struct * context)
{
char *filename = SAFEMAKEPTR (DS,DX);
struct stat s;
int res,cx;
res = stat(DOS_GetUnixFileName(filename), &s);
if (res==-1)
{
errno_to_doserr();
EAX = (EAX & 0xffffff00) | ExtendedError;
SetCflag;
return;
}
cx = 0;
if (S_ISDIR(s.st_mode))
cx|=0x10;
if ((S_IWRITE & s.st_mode) != S_IWRITE)
cx|=0x01;
ECX = (ECX & 0xffff0000) | cx;
ResetCflag;
Error (0,0,0);
}
/************************************************************************/
int do_int21(struct sigcontext_struct * context)
{
if (debugging_relay)
{
fprintf(stddeb,"int21: AX %04x, BX %04x, CX %04x, DX %04x, "
"SI %04x, DI %04x, DS %04x, ES %04x\n",
AX, BX, CX, DX, SI, DI, DS, ES);
}
if (AH == 0x59)
{
GetExtendedErrorInfo(context);
return 1;
}
else
{
Error (0,0,0);
switch(AH)
{
case 0x00: /* TERMINATE PROGRAM */
exit(0);
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 */
IntBarf(0x21, context);
break;
case 0x18: /* NULL FUNCTIONS FOR CP/M COMPATIBILITY */
case 0x1d:
case 0x1e:
case 0x20:
case 0x2b: /* SET SYSTEM DATE */
case 0x2d: /* SET SYSTEM TIME */
case 0x37: /* "SWITCHAR" - GET SWITCH CHARACTER
"SWITCHAR" - SET SWITCH CHARACTER
"AVAILDEV" - SPECIFY \DEV\ PREFIX USE */
case 0x54: /* GET VERIFY FLAG */
case 0x6b: /* NULL FUNCTION */
IntBarf(0x21, context);
EAX &= 0xff00;
break;
case 0x5c: /* "FLOCK" - RECORD LOCKING */
fLock(context);
break;
case 0x0d: /* DISK BUFFER FLUSH */
ResetCflag; /* dos 6+ only */
break;
case 0x0e: /* SELECT DEFAULT DRIVE */
if (!DOS_ValidDrive(DL)) {
Error (InvalidDrive, EC_MediaError, EL_Disk);
break;
} else {
DOS_SetDefaultDrive(DL);
AX = MAX_DOS_DRIVES;
Error(0,0,0);
}
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 = DOS_GetDefaultDrive();
Error (0,0,0);
break;
case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
dta = SAFEMAKEPTR(DS, DX);
break;
case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
GetDefDriveAllocInfo(context);
break;
case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
GetDriveAllocInfo(context);
break;
case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
GetDrivePB(context);
break;
case 0x25: /* SET INTERRUPT VECTOR */
/* Ignore any attempt to set a segment vector */
dprintf_int(stdnimp,
"int21: set interrupt vector %2x (%04x:%04x)\n",
AL, DS, DX);
break;
case 0x2a: /* GET SYSTEM DATE */
GetSystemDate(context);
break;
case 0x2c: /* GET SYSTEM TIME */
GetSystemTime(context);
break;
case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */
ES = segment(dta);
BX = offset(dta);
break;
case 0x30: /* GET DOS VERSION */
AX = DOSVERSION;
BX = 0x0012; /* 0x123456 is Wine's serial # */
CX = 0x3456;
break;
case 0x31: /* TERMINATE AND STAY RESIDENT */
IntBarf(0x21, context);
break;
case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
GetDrivePB(context);
break;
case 0x33: /* MULTIPLEXED */
switch (AL) {
case 0x00: /* GET CURRENT EXTENDED BREAK STATE */
if (!(AL))
EDX &= 0xff00L;
break;
case 0x01: /* SET EXTENDED BREAK STATE */
break;
case 0x02: /* GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE*/
DL = 0;
break;
case 0x05: /* GET BOOT DRIVE */
DL = 2;
/* c: is Wine's bootdrive */
break;
case 0x06: /* GET TRUE VERSION NUMBER */
EBX = DOSVERSION;
EDX = 0x00;
break;
default:
IntBarf(0x21, context);
break;
}
break;
case 0x34: /* GET ADDRESS OF INDOS FLAG */
ES = segment(heap->InDosFlag);
BX = offset(heap->InDosFlag);
break;
case 0x35: /* GET INTERRUPT VECTOR */
/* Return a NULL segment selector - this will bomb,
if anyone ever tries to use it */
dprintf_int(stdnimp, "int21: get interrupt vector %2x\n",
AX & 0xff);
ES = 0;
BX = 0;
break;
case 0x36: /* GET FREE DISK SPACE */
GetFreeDiskSpace(context);
break;
case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
AX = 0x02; /* no country support available */
SetCflag;
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( SAFEMAKEPTR(DS,DX)) ) == -1) {
errno_to_doserr();
AL = ExtendedError;
SetCflag;
break;
}
Error(0,0,0);
ResetCflag;
break;
case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
SeekFile(context);
break;
case 0x43: /* FILE ATTRIBUTES */
switch (AL)
{
case 0x00:
GetFileAttribute(context);
break;
case 0x01:
ResetCflag;
break;
}
break;
case 0x44: /* IOCTL */
switch (AL)
{
case 0x00:
ioctlGetDeviceInfo(context);
break;
case 0x09: /* CHECK IF BLOCK DEVICE REMOTE */
EDX = (EDX & 0xffff0000) | (1<<9) | (1<<12) | (1<<15);
ResetCflag;
break;
case 0x0b: /* SET SHARING RETRY COUNT */
if (!CX)
{
EAX = (EAX & 0xffff0000) | 0x0001;
SetCflag;
break;
}
sharing_pause = CX;
if (!DX)
sharing_retries = DX;
ResetCflag;
break;
case 0x0d:
ioctlGenericBlkDevReq(context);
break;
default:
IntBarf(0x21, context);
break;
}
break;
case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */
case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
AX = dup(BX);
ResetCflag;
break;
case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
GetCurrentDirectory(context);
AX = 0x0100;
/* intlist: many Microsoft products for Windows rely on this */
break;
case 0x48: /* ALLOCATE MEMORY */
case 0x49: /* FREE MEMORY */
case 0x4a: /* RESIZE MEMORY BLOCK */
IntBarf(0x21, context);
break;
case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
ExecProgram(context);
break;
case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
exit(AL);
break;
case 0x4d: /* GET RETURN CODE */
AL = 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 0x52: /* "SYSVARS" - GET LIST OF LISTS */
ES = 0x0;
BX = 0x0;
IntBarf(0x21, context);
break;
case 0x56: /* "RENAME" - RENAME FILE */
RenameFile(context);
break;
case 0x57: /* FILE DATE AND TIME */
switch (AL)
{
case 0x00:
GetFileDateTime(context);
break;
case 0x01:
SetFileDateTime(context);
break;
}
break;
case 0x58: /* GET OR SET MEMORY/UMB ALLOCATION STRATEGY */
switch (AL)
{
case 0x00:
AL = 0x01L;
break;
case 0x02:
EAX &= 0xff00L;
break;
case 0x01:
case 0x03:
break;
}
ResetCflag;
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 */
AL = NoNetwork;
SetCflag;
break;
case 0x5f: /* NETWORK */
switch (AL)
{
case 0x07: /* ENABLE DRIVE */
if (!DOS_EnableDrive(DL))
{
Error(InvalidDrive, EC_MediaError , EL_Disk);
AL = InvalidDrive;
SetCflag;
break;
}
else
{
ResetCflag;
break;
}
case 0x08: /* DISABLE DRIVE */
if (!DOS_DisableDrive(DL))
{
Error(InvalidDrive, EC_MediaError , EL_Disk);
AL = InvalidDrive;
SetCflag;
break;
}
else
{
ResetCflag;
break;
}
default:
/* network software not installed */
AL = NoNetwork;
SetCflag;
break;
}
break;
case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
strncpy(SAFEMAKEPTR(ES,DI), SAFEMAKEPTR(DS,SI), strlen(SAFEMAKEPTR(DS,SI)) & 0x7f);
ResetCflag;
break;
case 0x61: /* UNUSED */
case 0x62: /* GET CURRENT PSP ADDRESS */
case 0x63: /* UNUSED */
case 0x64: /* OS/2 DOS BOX */
case 0x65: /* GET EXTENDED COUNTRY INFORMATION */
IntBarf(0x21, context);
break;
case 0x66: /* GLOBAL CODE PAGE TABLE */
switch (AL) {
case 0x01:
BX = CodePage;
DX = BX;
ResetCflag;
break;
case 0x02:
CodePage = BX;
ResetCflag;
break;
}
break;
case 0x67: /* SET HANDLE COUNT */
ResetCflag;
break;
case 0x68: /* "FFLUSH" - COMMIT FILE */
ResetCflag;
break;
case 0x69: /* DISK SERIAL NUMBER */
switch (AL)
{
case 0x00:
GetDiskSerialNumber(context);
break;
case 0x01:
SetDiskSerialNumber(context);
break;
}
break;
case 0x6a: /* COMMIT FILE */
ResetCflag;
break;
case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */
break;
default:
IntBarf(0x21, context);
return 1;
}
}
return 1;
}
/**********************************************************************
* DOS3Call
*/
void DOS3Call(void)
{
do_int21((struct sigcontext_struct *) _CONTEXT);
ReturnFromRegisterFunc();
}
void INT21_Init(void)
{
int handle;
MDESC *DosHeapDesc;
if ((handle = GlobalAlloc(GMEM_FIXED,sizeof(struct DosHeap))) == 0)
{
fprintf( stderr, "INT21_Init: Out of memory\n");
exit(1);
}
heap = (struct DosHeap *) GlobalLock(handle);
HEAP_Init(&DosHeapDesc, heap, sizeof(struct DosHeap));
dta = heap->dta;
heap->InDosFlag = 0;
strcpy(heap->biosdate, "01/01/80");
}
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