83b77cbb1b
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@427 6ac86273-5f31-0410-b378-82cca8765d1b
382 lines
11 KiB
C
382 lines
11 KiB
C
/****************************************************************/
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/* */
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/* ioctl.c */
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/* */
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/* DOS-C ioctl system call */
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/* */
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/* Copyright (c) 1995,1998 */
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/* Pasquale J. Villani */
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/* All Rights Reserved */
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/* */
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/* This file is part of DOS-C. */
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/* */
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/* DOS-C is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU General Public License */
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/* as published by the Free Software Foundation; either version */
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/* 2, or (at your option) any later version. */
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/* */
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/* DOS-C is distributed in the hope that it will be useful, but */
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/* WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
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/* the GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public */
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/* License along with DOS-C; see the file COPYING. If not, */
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/* write to the Free Software Foundation, 675 Mass Ave, */
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/* Cambridge, MA 02139, USA. */
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/****************************************************************/
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#include "portab.h"
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#include "globals.h"
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#ifdef VERSION_STRINGS
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static BYTE *RcsId =
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"$Id$";
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#endif
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/*
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* WARNING: this code is non-portable (8086 specific).
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*/
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/* TE 10/29/01
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although device drivers have only 20 pushes available for them,
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MS NET plays by its own rules
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at least TE's network card driver DM9PCI (some 10$ NE2000 clone) does:
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with SP=8DC before calling down to execrh, and SP=8CC when
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callf [interrupt], DM9PCI touches DOSDS:792,
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14 bytes into error stack :-(((
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so some optimizations were made.
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this uses the fact, that only CharReq device buffer is ever used.
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fortunately, this saves some code as well :-)
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*/
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COUNT DosDevIOctl(lregs * r)
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{
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sft FAR *s;
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struct dpb FAR *dpbp;
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COUNT nMode;
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/* commonly used, shouldn't harm to do front up */
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CharReqHdr.r_length = sizeof(request);
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CharReqHdr.r_trans = MK_FP(r->DS, r->DX);
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CharReqHdr.r_status = 0;
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CharReqHdr.r_count = r->CX;
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/* Test that the handle is valid */
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switch (r->AL)
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{
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case 0x00:
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case 0x01:
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case 0x02:
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case 0x03:
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case 0x06:
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case 0x07:
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case 0x0a:
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case 0x0c:
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case 0x10:
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/* Get the SFT block that contains the SFT */
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if ((s = get_sft(r->BX)) == (sft FAR *) - 1)
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return DE_INVLDHNDL;
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switch (r->AL)
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{
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case 0x00:
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/* Get the flags from the SFT */
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if (s->sft_flags & SFT_FDEVICE)
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r->AX = (s->sft_dev->dh_attr & 0xff00) | s->sft_flags_lo;
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else
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r->AX = s->sft_flags;
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/* Undocumented result, Ax = Dx seen using Pcwatch */
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r->DX = r->AX;
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break;
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case 0x01:
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/* sft_flags is a file, return an error because you */
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/* can't set the status of a file. */
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if (!(s->sft_flags & SFT_FDEVICE))
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return DE_INVLDFUNC;
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/* Set it to what we got in the DL register from the */
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/* user. */
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r->AL = s->sft_flags_lo = SFT_FDEVICE | r->DL;
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break;
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case 0x02:
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nMode = C_IOCTLIN;
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goto IoCharCommon;
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case 0x03:
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nMode = C_IOCTLOUT;
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goto IoCharCommon;
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case 0x06:
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if (s->sft_flags & SFT_FDEVICE)
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r->AL = s->sft_flags & SFT_FEOF ? 0xFF : 0;
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else
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r->AL = s->sft_posit >= s->sft_size ? 0xFF : 0;
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break;
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case 0x07:
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if (s->sft_flags & SFT_FDEVICE)
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{
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nMode = C_OSTAT;
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goto IoCharCommon;
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}
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r->AL = 0;
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break;
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case 0x0a:
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r->DX = s->sft_flags;
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r->AX = 0;
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break;
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case 0x0c:
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nMode = C_GENIOCTL;
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goto IoCharCommon;
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case 0x10:
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nMode = C_IOCTLQRY;
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IoCharCommon:
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if ((s->sft_flags & SFT_FDEVICE)
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|| ((r->AL == 0x02) && (s->sft_dev->dh_attr & SFT_FIOCTL))
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|| ((r->AL == 0x03) && (s->sft_dev->dh_attr & SFT_FIOCTL))
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|| ((r->AL == 0x10) && (s->sft_dev->dh_attr & ATTR_QRYIOCTL))
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|| ((r->AL == 0x0c) && (s->sft_dev->dh_attr & ATTR_GENIOCTL)))
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{
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CharReqHdr.r_unit = 0;
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CharReqHdr.r_command = nMode;
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execrh((request FAR *) & CharReqHdr, s->sft_dev);
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if (CharReqHdr.r_status & S_ERROR)
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{
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CritErrCode = (CharReqHdr.r_status & S_MASK) + 0x13;
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return DE_DEVICE;
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}
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if (r->AL == 0x07)
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{
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r->AL = CharReqHdr.r_status & S_BUSY ? 00 : 0xff;
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}
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else if (r->AL == 0x02 || r->AL == 0x03)
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{
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r->AX = CharReqHdr.r_count;
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}
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else if (r->AL == 0x0c || r->AL == 0x10)
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{
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r->AX = CharReqHdr.r_status;
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}
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break;
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}
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/* fall through */
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default:
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return DE_INVLDFUNC;
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}
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break;
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case 0x04:
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case 0x05:
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case 0x08:
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case 0x09:
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case 0x0d:
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case 0x0e:
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case 0x0f:
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case 0x11:
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/*
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This line previously returned the deviceheader at r->bl. But,
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DOS numbers its drives starting at 1, not 0. A=1, B=2, and so
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on. Changed this line so it is now zero-based.
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-SRM
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*/
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/* JPP - changed to use default drive if drive=0 */
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/* JT Fixed it */
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CharReqHdr.r_unit = (r->BL == 0 ? default_drive : r->BL - 1);
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dpbp = get_dpb(CharReqHdr.r_unit);
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switch (r->AL)
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{
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case 0x04:
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nMode = C_IOCTLIN;
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goto IoBlockCommon;
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case 0x05:
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nMode = C_IOCTLOUT;
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goto IoBlockCommon;
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case 0x08:
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if (!dpbp)
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{
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return DE_INVLDDRV;
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}
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if (dpbp->dpb_device->dh_attr & ATTR_EXCALLS)
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{
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nMode = C_REMMEDIA;
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goto IoBlockCommon;
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}
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return DE_INVLDFUNC;
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case 0x09:
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if (get_cds(CharReqHdr.r_unit) != NULL && dpbp == NULL)
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{
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r->DX = ATTR_REMOTE;
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r->AX = S_DONE | S_BUSY;
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}
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else
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{
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if (!dpbp)
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{
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return DE_INVLDDRV;
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}
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/* Need to add subst bit 15 */
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r->DX = dpbp->dpb_device->dh_attr;
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r->AX = S_DONE | S_BUSY;
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}
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break;
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case 0x0d:
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nMode = C_GENIOCTL;
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goto IoBlockCommon;
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case 0x11:
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nMode = C_IOCTLQRY;
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IoBlockCommon:
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if (!dpbp)
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{
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return DE_INVLDDRV;
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}
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if (((r->AL == 0x04) && !(dpbp->dpb_device->dh_attr & ATTR_IOCTL))
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|| ((r->AL == 0x05) && !(dpbp->dpb_device->dh_attr & ATTR_IOCTL))
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|| ((r->AL == 0x11)
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&& !(dpbp->dpb_device->dh_attr & ATTR_QRYIOCTL))
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|| ((r->AL == 0x0d)
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&& !(dpbp->dpb_device->dh_attr & ATTR_GENIOCTL)))
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{
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return DE_INVLDFUNC;
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}
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CharReqHdr.r_command = nMode;
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execrh((request FAR *) & CharReqHdr, dpbp->dpb_device);
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if (CharReqHdr.r_status & S_ERROR)
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{
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CritErrCode = (CharReqHdr.r_status & S_MASK) + 0x13;
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return DE_DEVICE;
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}
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if (r->AL == 0x08)
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{
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r->AX = (CharReqHdr.r_status & S_BUSY) ? 1 : 0;
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}
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else if (r->AL == 0x04 || r->AL == 0x05)
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{
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r->AX = CharReqHdr.r_count;
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}
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else if (r->AL == 0x0d || r->AL == 0x11)
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{
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r->AX = CharReqHdr.r_status;
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}
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break;
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case 0x0e:
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nMode = C_GETLDEV;
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goto IoLogCommon;
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case 0x0f:
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nMode = C_SETLDEV;
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IoLogCommon:
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if (!dpbp)
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{
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return DE_INVLDDRV;
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}
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if ((dpbp->dpb_device->dh_attr & ATTR_GENIOCTL))
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{
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CharReqHdr.r_command = nMode;
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execrh((request FAR *) & CharReqHdr, dpbp->dpb_device);
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if (CharReqHdr.r_status & S_ERROR)
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{
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CritErrCode = (CharReqHdr.r_status & S_MASK) + 0x13;
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return DE_ACCESS;
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}
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else
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{
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r->AL = CharReqHdr.r_unit;
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return SUCCESS;
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}
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} /* fall through */
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default:
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return DE_INVLDFUNC;
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}
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break;
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case 0x0b:
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/* skip, it's a special case. */
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NetDelay = r->CX;
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if (!r->DX)
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NetRetry = r->DX;
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break;
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default:
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return DE_INVLDFUNC;
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}
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return SUCCESS;
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}
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/*
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* Log: ioctl.c,v - for newer log entries do "cvs log ioctl.c"
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*
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* Revision 1.4 2000/04/29 05:13:16 jtabor
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* Added new functions and clean up code
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*
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* Revision 1.3 2000/03/09 06:07:11 kernel
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* 2017f updates by James Tabor
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*
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* Revision 1.2 1999/04/04 18:51:43 jprice
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* no message
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*
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* Revision 1.1.1.1 1999/03/29 15:41:09 jprice
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* New version without IPL.SYS
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*
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* Revision 1.4 1999/02/08 05:55:57 jprice
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* Added Pat's 1937 kernel patches
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*
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* Revision 1.3 1999/02/01 01:48:41 jprice
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* 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)
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*
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* Revision 1.2 1999/01/22 04:13:26 jprice
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* Formating
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*
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* Revision 1.1.1.1 1999/01/20 05:51:01 jprice
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* Imported sources
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*
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*
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* Rev 1.7 06 Dec 1998 8:48:22 patv
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* Expanded due to new I/O subsystem.
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*
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* Rev 1.6 11 Jan 1998 2:06:22 patv
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* Added functionality to ioctl.
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*
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* Rev 1.5 04 Jan 1998 23:15:18 patv
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* Changed Log for strip utility
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*
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* Rev 1.4 16 Jan 1997 12:46:54 patv
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* pre-Release 0.92 feature additions
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*
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* Rev 1.3 29 May 1996 21:03:30 patv
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* bug fixes for v0.91a
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*
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* Rev 1.2 19 Feb 1996 3:21:34 patv
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* Added NLS, int2f and config.sys processing
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*
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* Rev 1.1 01 Sep 1995 17:54:16 patv
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* First GPL release.
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*
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* Rev 1.0 02 Jul 1995 8:32:04 patv
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* Initial revision.
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*/
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