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/*
* Copyright (C) 2002-2021 The DOSBox Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <string.h>
#include "dosbox.h"
#include "callback.h"
#include "mem.h"
#include "regs.h"
#include "dos_inc.h"
bool DOS_IOCTL(void) {
// LOG(LOG_IOCTL,LOG_WARN)("%X %X %X %X",reg_ax,reg_bx,reg_cx,reg_dx);
uint8_t handle=0; // DOS managed up to 256 file handles (and our 'Files' array is 8-bit)
uint8_t drive=0;
/* calls 0-4,6,7,10,12,16 use a file handle */
if ((reg_al<4) || (reg_al==0x06) || (reg_al==0x07) || (reg_al==0x0a) || (reg_al==0x0c) || (reg_al==0x10)) {
handle=RealHandle(reg_bx);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
}
if (!Files[handle]) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
}
} else if (reg_al<0x12) { /* those use a diskdrive except 0x0b */
if (reg_al!=0x0b) {
drive=reg_bl;if (!drive) drive = DOS_GetDefaultDrive();else drive--;
if( (drive >= 2) && !(( drive < DOS_DRIVES ) && Drives[drive]) ) {
DOS_SetError(DOSERR_INVALID_DRIVE);
return false;
}
}
} else {
LOG(LOG_DOSMISC,LOG_ERROR)("DOS:IOCTL Call %2X unhandled",reg_al);
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
}
switch(reg_al) {
case 0x00: /* Get Device Information */
if (Files[handle]->GetInformation() & 0x8000) { //Check for device
reg_dx = Files[handle]->GetInformation() & ~EXT_DEVICE_BIT;
} else {
uint8_t hdrive=Files[handle]->GetDrive();
if (hdrive==0xff) {
LOG(LOG_IOCTL,LOG_NORMAL)("00:No drive set");
hdrive=2; // defaulting to C:
}
/* return drive number in lower 5 bits for block devices */
reg_dx=(Files[handle]->GetInformation()&0xffe0)|hdrive;
}
reg_ax=reg_dx; //Destroyed officially
return true;
case 0x01: /* Set Device Information */
if (reg_dh != 0) {
DOS_SetError(DOSERR_DATA_INVALID);
return false;
} else {
if (Files[handle]->GetInformation() & 0x8000) { //Check for device
reg_al = reinterpret_cast<DOS_Device *>(Files[handle])->GetStatus(true);
} else {
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
}
}
return true;
case 0x02: /* Read from Device Control Channel */
if (Files[handle]->GetInformation() & 0xc000) {
/* is character device with IOCTL support */
PhysPt bufptr=PhysMake(SegValue(ds),reg_dx);
uint16_t retcode=0;
if (((DOS_Device*)(Files[handle]))->ReadFromControlChannel(bufptr,reg_cx,&retcode)) {
reg_ax=retcode;
return true;
}
}
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
case 0x03: /* Write to Device Control Channel */
if (Files[handle]->GetInformation() & 0xc000) {
/* is character device with IOCTL support */
PhysPt bufptr=PhysMake(SegValue(ds),reg_dx);
uint16_t retcode=0;
if (((DOS_Device*)(Files[handle]))->WriteToControlChannel(bufptr,reg_cx,&retcode)) {
reg_ax=retcode;
return true;
}
}
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
case 0x06: /* Get Input Status */
if (Files[handle]->GetInformation() & 0x8000) { //Check for device
reg_al=(Files[handle]->GetInformation() & 0x40) ? 0x0 : 0xff;
} else { // FILE
uint32_t oldlocation=0;
Files[handle]->Seek(&oldlocation, DOS_SEEK_CUR);
uint32_t endlocation=0;
Files[handle]->Seek(&endlocation, DOS_SEEK_END);
if(oldlocation < endlocation){//Still data available
reg_al=0xff;
} else {
reg_al=0x0; //EOF or beyond
}
Files[handle]->Seek(&oldlocation, DOS_SEEK_SET); //restore filelocation
LOG(LOG_IOCTL,LOG_NORMAL)("06:Used Get Input Status on regular file with handle %u",handle);
}
return true;
case 0x07: /* Get Output Status */
if (Files[handle]->GetInformation() & EXT_DEVICE_BIT) {
reg_al = reinterpret_cast<DOS_Device *>(Files[handle])->GetStatus(false);
return true;
}
LOG(LOG_IOCTL, LOG_NORMAL)("07:Fakes output status is ready for handle %u", handle);
reg_al = 0xff;
return true;
case 0x08: /* Check if block device removable */
/* cdrom drives and drive a&b are removable */
if (drive < 2) reg_ax=0;
else if (!Drives[drive]->isRemovable()) reg_ax=1;
else {
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
}
return true;
case 0x09: /* Check if block device remote */
if ((drive >= 2) && Drives[drive]->isRemote()) {
reg_dx=0x1000; // device is remote
// undocumented bits always clear
} else {
reg_dx=0x0802; // Open/Close supported; 32bit access supported (any use? fixes Fable installer)
// undocumented bits from device attribute word
// TODO Set bit 9 on drives that don't support direct I/O
}
reg_ax=0x300;
return true;
case 0x0B: /* Set sharing retry count */
if (reg_dx==0) {
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
}
return true;
case 0x0D: /* Generic block device request */
{
if (drive < 2 && !Drives[drive]) {
DOS_SetError(DOSERR_ACCESS_DENIED);
return false;
}
if (reg_ch != 0x08 || Drives[drive]->isRemovable()) {
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
}
PhysPt ptr = SegPhys(ds)+reg_dx;
switch (reg_cl) {
case 0x60: /* Get Device parameters */
//mem_writeb(ptr+0,0); // special functions (call value)
mem_writeb(ptr+1,(drive>=2)?0x05:0x07); // type: hard disk(5), 1.44 floppy(7)
mem_writew(ptr+2,(drive>=2)?0x01:0x00); // attributes: bit 0 set for nonremovable
mem_writew(ptr+4,0x0000); // num of cylinders
mem_writeb(ptr+6,0x00); // media type (00=other type)
// bios parameter block following
mem_writew(ptr+7,0x0200); // bytes per sector (Win3 File Mgr. uses it)
break;
case 0x46: /* Set volume serial number */
break;
case 0x66: /* Get volume serial number */
{
char const* bufin=Drives[drive]->GetLabel();
char buffer[11];memset(buffer,' ',11);
char const* find_ext=strchr(bufin,'.');
if (find_ext) {
Bitu size=(Bitu)(find_ext-bufin);
if (size>8) size=8;
memcpy(buffer,bufin,size);
find_ext++;
memcpy(buffer+8,find_ext,(strlen(find_ext)>3) ? 3 : strlen(find_ext));
} else {
memcpy(buffer,bufin,(strlen(bufin) > 8) ? 8 : strlen(bufin));
}
char buf2[8]={ 'F','A','T','1','6',' ',' ',' '};
if(drive<2) buf2[4] = '2'; //FAT12 for floppies
//mem_writew(ptr+0,0); //Info level (call value)
mem_writed(ptr+2,0x1234); //Serial number
MEM_BlockWrite(ptr+6,buffer,11);//volumename
MEM_BlockWrite(ptr+0x11,buf2,8);//filesystem
}
break;
default :
LOG(LOG_IOCTL,LOG_ERROR)("DOS:IOCTL Call 0D:%2X Drive %2X unhandled",reg_cl,drive);
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
}
reg_ax=0;
return true;
}
case 0x0E: /* Get Logical Drive Map */
if (drive < 2) {
if (Drives[drive]) reg_al=drive+1;
else reg_al=1;
} else if (Drives[drive]->isRemovable()) {
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
} else reg_al=0; /* Only 1 logical drive assigned */
reg_ah=0x07;
return true;
default:
LOG(LOG_DOSMISC,LOG_ERROR)("DOS:IOCTL Call %2X unhandled",reg_al);
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
break;
}
return false;
}
bool DOS_GetSTDINStatus(void) {
uint32_t handle=RealHandle(STDIN);
if (handle==0xFF) return false;
if (Files[handle] && (Files[handle]->GetInformation() & 64)) return false;
return true;
}
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