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FreeDOS/kernel/ioctl.c
Bart Oldeman 9e007d884e kernel 2025a changes: see history.txt 
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@314 6ac86273-5f31-0410-b378-82cca8765d1b
2001-11-04 19:47:39 +00:00

425 lines
11 KiB
C
Raw Blame History

/****************************************************************/
/* */
/* ioctl.c */
/* */
/* DOS-C ioctl system call */
/* */
/* Copyright (c) 1995,1998 */
/* Pasquale J. Villani */
/* All Rights Reserved */
/* */
/* This file is part of DOS-C. */
/* */
/* DOS-C 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, or (at your option) any later version. */
/* */
/* DOS-C 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 DOS-C; see the file COPYING. If not, */
/* write to the Free Software Foundation, 675 Mass Ave, */
/* Cambridge, MA 02139, USA. */
/****************************************************************/
#include "portab.h"
#include "globals.h"
#ifdef VERSION_STRINGS
static BYTE *RcsId = "$Id$";
#endif
/*
* $Log$
* Revision 1.12 2001/11/04 19:47:39 bartoldeman
* kernel 2025a changes: see history.txt
*
* Revision 1.11 2001/07/22 01:58:58 bartoldeman
* Support for Brian's FORMAT, DJGPP libc compilation, cleanups, MSCDEX
*
* Revision 1.10 2001/07/09 22:19:33 bartoldeman
* LBA/FCB/FAT/SYS/Ctrl-C/ioctl fixes + memory savings
*
* Revision 1.9 2001/06/03 14:16:18 bartoldeman
* BUFFERS tuning and misc bug fixes/cleanups (2024c).
*
* Revision 1.8 2001/04/15 03:21:50 bartoldeman
* See history.txt for the list of fixes.
*
* Revision 1.7 2001/03/30 22:27:42 bartoldeman
* Saner lastdrive handling.
*
* Revision 1.6 2000/06/21 18:16:46 jimtabor
* Add UMB code, patch, and code fixes
*
* Revision 1.5 2000/05/25 20:56:21 jimtabor
* Fixed project history
*
* Revision 1.4 2000/05/17 19:15:12 jimtabor
* Cleanup, add and fix source.
*
* Revision 1.3 2000/05/11 04:26:26 jimtabor
* Added code for DOS FN 69 & 6C
*
* Revision 1.2 2000/05/08 04:30:00 jimtabor
* Update CVS to 2020
*
* Revision 1.1.1.1 2000/05/06 19:34:53 jhall1
* The FreeDOS Kernel. A DOS kernel that aims to be 100% compatible with
* MS-DOS. Distributed under the GNU GPL.
*
* Revision 1.4 2000/04/29 05:13:16 jtabor
* Added new functions and clean up code
*
* Revision 1.3 2000/03/09 06:07:11 kernel
* 2017f updates by James Tabor
*
* Revision 1.2 1999/04/04 18:51:43 jprice
* no message
*
* Revision 1.1.1.1 1999/03/29 15:41:09 jprice
* New version without IPL.SYS
*
* Revision 1.4 1999/02/08 05:55:57 jprice
* Added Pat's 1937 kernel patches
*
* Revision 1.3 1999/02/01 01:48:41 jprice
* Clean up; Now you can use hex numbers in config.sys. added config.sys screen function to change screen mode (28 or 43/50 lines)
*
* Revision 1.2 1999/01/22 04:13:26 jprice
* Formating
*
* Revision 1.1.1.1 1999/01/20 05:51:01 jprice
* Imported sources
*
*
* Rev 1.7 06 Dec 1998 8:48:22 patv
* Expanded due to new I/O subsystem.
*
* Rev 1.6 11 Jan 1998 2:06:22 patv
* Added functionality to ioctl.
*
* Rev 1.5 04 Jan 1998 23:15:18 patv
* Changed Log for strip utility
*
* Rev 1.4 16 Jan 1997 12:46:54 patv
* pre-Release 0.92 feature additions
*
* Rev 1.3 29 May 1996 21:03:30 patv
* bug fixes for v0.91a
*
* Rev 1.2 19 Feb 1996 3:21:34 patv
* Added NLS, int2f and config.sys processing
*
* Rev 1.1 01 Sep 1995 17:54:16 patv
* First GPL release.
*
* Rev 1.0 02 Jul 1995 8:32:04 patv
* Initial revision.
*/
/*
* WARNING: this code is non-portable (8086 specific).
*/
/* TE 10/29/01
although device drivers have only 20 pushes available for them,
MS NET plays by its own rules
at least TE's network card driver DM9PCI (some 10$ NE2000 clone) does:
with SP=8DC before calling down to execrh, and SP=8CC when
callf [interrupt], DM9PCI touches DOSDS:792,
14 bytes into error stack :-(((
so some optimizations were made.
this uses the fact, that only CharReq device buffer is ever used.
fortunately, this saves some code as well :-)
*/
COUNT DosDevIOctl(iregs FAR * r)
{
sft FAR *s;
struct dpb FAR *dpbp;
COUNT nMode;
/* commonly used, shouldn't harm to do front up */
CharReqHdr.r_length = sizeof(request);
CharReqHdr.r_trans = MK_FP(r->DS, r->DX);
CharReqHdr.r_status = 0;
CharReqHdr.r_count = r->CX;
/* Test that the handle is valid */
switch (r->AL)
{
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x06:
case 0x07:
case 0x0a:
case 0x0c:
/* Get the SFT block that contains the SFT */
if ((s = get_sft(r->BX)) == (sft FAR *) - 1)
return DE_INVLDHNDL;
break;
case 0x04:
case 0x05:
case 0x08:
case 0x09:
case 0x0d:
case 0x0e:
case 0x0f:
case 0x10:
case 0x11:
/*
This line previously returned the deviceheader at r->bl. But,
DOS numbers its drives starting at 1, not 0. A=1, B=2, and so
on. Changed this line so it is now zero-based.
-SRM
*/
/* JPP - changed to use default drive if drive=0 */
/* JT Fixed it */
CharReqHdr.r_unit = ( r->BL == 0 ? default_drive : r->BL - 1);
if (CharReqHdr.r_unit >= lastdrive)
return DE_INVLDDRV;
else
{
/* cdsp = &CDSp->cds_table[CharReqHdr.r_unit]; */
dpbp = CDSp->cds_table[CharReqHdr.r_unit].cdsDpb;
}
break;
case 0x0b:
/* skip, it's a special case. */
NetDelay = r->CX;
if (!r->DX)
NetRetry = r->DX;
break;
default:
return DE_INVLDFUNC;
}
switch (r->AL)
{
case 0x00:
/* Get the flags from the SFT */
if (s->sft_flags & SFT_FDEVICE)
r->AX = (s->sft_dev->dh_attr & 0xff00) | s->sft_flags_lo;
else
r->AX = s->sft_flags;
/* Undocumented result, Ax = Dx seen using Pcwatch */
r->DX = r->AX;
break;
case 0x01:
/* sft_flags is a file, return an error because you */
/* can't set the status of a file. */
if (!(s->sft_flags & SFT_FDEVICE))
return DE_INVLDFUNC;
/* Set it to what we got in the DL register from the */
/* user. */
r->AL = s->sft_flags_lo = SFT_FDEVICE | r->DL;
break;
case 0x0c:
nMode = C_GENIOCTL;
goto IoCharCommon;
case 0x02:
nMode = C_IOCTLIN;
goto IoCharCommon;
case 0x10:
nMode = C_IOCTLQRY;
goto IoCharCommon;
case 0x03:
nMode = C_IOCTLOUT;
IoCharCommon:
if ((s->sft_flags & SFT_FDEVICE)
|| ((r->AL == 0x02 ) && (s->sft_dev->dh_attr & SFT_FIOCTL))
|| ((r->AL == 0x03 ) && (s->sft_dev->dh_attr & SFT_FIOCTL))
|| ((r->AL == 0x10) && (s->sft_dev->dh_attr & ATTR_QRYIOCTL))
|| ((r->AL == 0x0c) && (s->sft_dev->dh_attr & ATTR_GENIOCTL)))
{
CharReqHdr.r_unit = 0;
CharReqHdr.r_command = nMode;
execrh((request FAR *) & CharReqHdr, s->sft_dev);
if (CharReqHdr.r_status & S_ERROR)
return DE_DEVICE;
if (r->AL == 0x07)
{
r->AL = CharReqHdr.r_status & S_BUSY ? 00 : 0xff;
}
else if (r->AL == 0x02 || r->AL == 0x03)
{
r->AX = CharReqHdr.r_count;
}
else if (r->AL == 0x0c || r->AL == 0x10)
{
r->AX = CharReqHdr.r_status;
}
break;
}
return DE_INVLDFUNC;
case 0x0d:
nMode = C_GENIOCTL;
goto IoBlockCommon;
case 0x04:
nMode = C_IOCTLIN;
goto IoBlockCommon;
case 0x11:
nMode = C_IOCTLQRY;
goto IoBlockCommon;
case 0x05:
nMode = C_IOCTLOUT;
IoBlockCommon:
if(!dpbp)
{
return DE_INVLDDRV;
}
if ( ((r->AL == 0x04 ) && !(dpbp->dpb_device->dh_attr & ATTR_IOCTL))
|| ((r->AL == 0x05 ) && !(dpbp->dpb_device->dh_attr & ATTR_IOCTL))
|| ((r->AL == 0x11) && !(dpbp->dpb_device->dh_attr & ATTR_QRYIOCTL))
|| ((r->AL == 0x0d) && !(dpbp->dpb_device->dh_attr & ATTR_GENIOCTL)))
{
return DE_INVLDFUNC;
}
CharReqHdr.r_command = nMode;
execrh((request FAR *) & CharReqHdr,
dpbp->dpb_device);
if (CharReqHdr.r_status & S_ERROR)
{
return DE_DEVICE;
}
if (r->AL == 0x08)
{
r->AX = (CharReqHdr.r_status & S_BUSY) ? 1 : 0;
}
else if (r->AL == 0x04 || r->AL == 0x05)
{
r->AX = CharReqHdr.r_count;
}
else if (r->AL == 0x0d || r->AL == 0x11)
{
r->AX = CharReqHdr.r_status;
}
break;
case 0x06:
if (s->sft_flags & SFT_FDEVICE)
{
r->AL = s->sft_flags & SFT_FEOF ? 0xFF : 0;
}
else
r->AL = s->sft_posit >= s->sft_size ? 0xFF : 0;
break;
case 0x07:
if (s->sft_flags & SFT_FDEVICE)
{
nMode = C_OSTAT;
goto IoCharCommon;
}
r->AL = 0;
break;
case 0x08:
if(!dpbp)
{
return DE_INVLDDRV;
}
if (dpbp->dpb_device->dh_attr & ATTR_EXCALLS)
{
nMode = C_REMMEDIA;
goto IoBlockCommon;
}
return DE_INVLDFUNC;
case 0x09:
if(CDSp->cds_table[CharReqHdr.r_unit].cdsFlags & CDSNETWDRV)
{
r->DX = ATTR_REMOTE ;
r->AX = S_DONE|S_BUSY;
}
else
{
if(!dpbp)
{
return DE_INVLDDRV;
}
/* Need to add subst bit 15 */
r->DX = dpbp->dpb_device->dh_attr;
r->AX = S_DONE|S_BUSY;
}
break;
case 0x0a:
r->DX = s->sft_flags;
r->AX = 0;
break;
case 0x0e:
nMode = C_GETLDEV;
goto IoLogCommon;
case 0x0f:
nMode = C_SETLDEV;
IoLogCommon:
if(!dpbp)
{
return DE_INVLDDRV;
}
if ((dpbp->dpb_device->dh_attr & ATTR_GENIOCTL))
{
CharReqHdr.r_command = nMode;
execrh((request FAR *) & CharReqHdr,
dpbp->dpb_device);
if (CharReqHdr.r_status & S_ERROR)
return DE_ACCESS;
else
{
r->AL = CharReqHdr.r_unit;
return SUCCESS;
}
}
return DE_INVLDFUNC;
default:
return DE_INVLDFUNC;
}
return SUCCESS;
}
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