/****************************************************************/ /* */ /* 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 1.13 2001/11/13 23:36:45 bartoldeman * Kernel 2025a final changes. * * 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) { CritErrCode = (CharReqHdr.r_status & S_MASK) + 0x13; 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) { CritErrCode = (CharReqHdr.r_status & S_MASK) + 0x13; 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) { CritErrCode = (CharReqHdr.r_status & S_MASK) + 0x13; return DE_ACCESS; } else { r->AL = CharReqHdr.r_unit; return SUCCESS; } } return DE_INVLDFUNC; default: return DE_INVLDFUNC; } return SUCCESS; }