809 lines
19 KiB
C
809 lines
19 KiB
C
/*
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* Copyright (c) 1992, 1993, 1996
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* Berkeley Software Design, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Berkeley Software
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* Design, Inc.
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*
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* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* BSDI intff.c,v 2.2 1996/04/08 19:32:56 bostic Exp
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <ctype.h>
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#include <unistd.h>
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#include "doscmd.h"
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#include "cwd.h"
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#include "dispatch.h"
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static LOL *lol = 0; /* DOS list-of-lists */
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static SDA *sda = 0; /* DOS swappable data area */
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/******************************************************************************
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** redirector functions
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**
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**
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** These are set up on entry to the redirector each time, and are referenced
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** by the functions here.
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*/
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static int r_drive,n_drive = 0;
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static CDS *r_cds;
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static SFT *r_sft;
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/*
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** 2f:11:0
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**
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** Installation check
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*/
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static int
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int2f11_00(regcontext_t *REGS)
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{
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R_AL = 0xff;
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R_AH = 'U'; /* and why not? 8) */
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return(0);
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}
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/*
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** 2f:11:1 2f:11:2 2f:11:3 2f:11:4 2f:11:5 2f:11:11 2f:11:13
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**
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** Directory functions
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*/
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static int
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int2f11_dirfn(regcontext_t *REGS)
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{
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char fname[PATH_MAX], tname[PATH_MAX];
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int error;
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error = translate_filename(sda->filename1, fname, &r_drive);
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if (error)
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return(error);
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if (dos_readonly(r_drive) && (R_AL != 0x05))
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return(WRITE_PROT_DISK);
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switch(R_AL) {
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case 0x01: /* rmdir */
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case 0x02:
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debug(D_REDIR,"rmdir(%s)\n",fname);
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error = rmdir(fname);
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break;
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case 0x03: /* mkdir */
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case 0x04:
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debug(D_REDIR,"mkdir(%s)\n",fname);
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error = mkdir(fname,0777);
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break;
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case 0x05: /* chdir */
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debug(D_REDIR,"chdir(%s)\n",fname);
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/* Note returns DOS error directly */
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return(dos_setcwd(sda->filename1));
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case 0x11: /* rename */
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error = translate_filename(sda->filename2, tname, &r_drive);
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if (!error) {
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debug(D_REDIR,"rename(%s,%s)\n",fname,tname);
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error = rename(fname, tname);
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}
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break;
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case 0x13: /* unlink */
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debug(D_REDIR,"unlink(%s)\n",fname);
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error = unlink(fname);
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break;
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default:
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fatal("called int2f11_dirfn on unknown function %x\n",R_AL);
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}
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if (error < 0) {
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switch(errno) {
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case ENOTDIR:
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case ENOENT:
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return(PATH_NOT_FOUND);
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case EXDEV:
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return(NOT_SAME_DEV);
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default:
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return(ACCESS_DENIED);
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}
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}
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return(0);
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}
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/*
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** 2f:11:6
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**
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** Close
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*/
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static int
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int2f11_close(regcontext_t *REGS __unused)
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{
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int fd;
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fd = r_sft->fd;
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debug(D_REDIR, "close(%d)\n", fd);
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r_sft->nfiles--;
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if (r_sft->nfiles) {
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debug(D_REDIR, "not last close\n");
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return(0);
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}
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if (close(fd) < 0)
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return(HANDLE_INVALID);
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return(0);
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}
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/*
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** 2f:11:8 2f:11:9
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**
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** read/write
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*/
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static int
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int2f11_rdwr(regcontext_t *REGS __unused)
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{
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int fd;
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char *addr;
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int nbytes;
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int n;
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fd = r_sft->fd;
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if (lseek(fd, r_sft->offset, SEEK_SET) < 0)
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return(SEEK_ERROR);
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addr = (char *)MAKEPTR(sda->dta_seg, sda->dta_off);
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nbytes = R_CX;
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switch(R_AL) {
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case 0x08: /* read */
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debug(D_REDIR, "read(%d, %d)\n", fd, nbytes);
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n = read(fd, addr, nbytes);
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if (n < 0)
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return(READ_FAULT);
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break;
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case 0x09:
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debug(D_REDIR, "write(%d, %d)\n", fd, nbytes);
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n = write(fd, addr, nbytes);
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if (n < 0)
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return(WRITE_FAULT);
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break;
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default:
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fatal("called int2f11_rdwr on unknown function %x\n",R_AL);
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}
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R_CX = n; /* report count */
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r_sft->offset += n;
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if (r_sft->offset > r_sft->size)
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r_sft->size = r_sft->offset;
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debug(D_REDIR, "offset now %ld\n", r_sft->offset);
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return(0);
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}
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/*
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** 2f:11:c
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**
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** Get free space (like 21:36)
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*/
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static int
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int2f11_free(regcontext_t *REGS __unused)
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{
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fsstat_t fs;
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int error;
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error = get_space(r_drive, &fs);
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if (error)
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return (error);
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R_AX = fs.sectors_cluster;
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R_BX = fs.total_clusters;
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R_CX = fs.bytes_sector;
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R_DX = fs.avail_clusters;
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return(0);
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}
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/*
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** 2f:11:f
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**
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** get size and mode
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*/
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static int
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int2f11_stat(regcontext_t *REGS __unused)
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{
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char fname[PATH_MAX];
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struct stat sb;
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int error;
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error = translate_filename(sda->filename1, fname, &r_drive);
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if (error)
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return(error);
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if (stat(fname, &sb) < 0)
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return(FILE_NOT_FOUND);
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R_AX = to_dos_attr(sb.st_mode);
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R_BX = sb.st_size >> 16;
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R_DI = sb.st_size & 0xffff;
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return(0);
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}
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/*
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** 2f:11:16 2f:11:17 2f:11:18 2f:11:2e
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**
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** Open/create a file, closely resembles int21_open.
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*/
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static int
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int2f11_open(regcontext_t *REGS)
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{
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char fname[PATH_MAX];
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struct stat sb;
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int error;
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int mode; /* open mode */
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int attr; /* attributes of created file */
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int action; /* what to do about file */
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u_char *p, *e;
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int i;
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int omode; /* mode to say we opened in */
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int status;
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int fd;
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error = translate_filename(sda->filename1, fname, &r_drive);
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if (error)
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return(error);
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/*
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** get attributes/access mode off stack : low byte is attribute, high
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** byte is (sometimes) used in conjunction with 'action'
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*/
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attr = *(u_short *)MAKEPTR(R_SS, R_SP) & 0xff;
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/* which style? */
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switch(R_AL) {
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case 0x16: /* open */
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action = 0x01; /* fail if does not exist */
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switch (sda->open_mode & 3) {
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case 0:
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mode = O_RDONLY;
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break;
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case 1:
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mode = O_WRONLY;
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break;
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case 2:
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mode = O_RDWR;
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break;
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default:
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return (FUNC_NUM_IVALID);
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}
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omode = sda->open_mode & 0x7f;
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debug(D_REDIR,"open");
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break;
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case 0x17: /* creat/creat new */
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case 0x18: /* creat/creat new (no CDS, but we don't care)*/
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mode = O_RDWR;
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omode = 3;
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if (attr & 0x100) { /* creat new */
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action = 0x10; /* create if not exist, fail if exists */
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debug(D_REDIR, "creat_new");
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} else { /* creat */
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action = 0x12; /* create and destroy */
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debug(D_REDIR, "creat");
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}
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break;
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case 0x2e: /* multipurpose */
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attr = sda->ext_attr;
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action = sda->ext_action;
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switch (sda->ext_mode & 3) {
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case 0:
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mode = O_RDONLY;
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break;
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case 1:
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mode = O_WRONLY;
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break;
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case 2:
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mode = O_RDWR;
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break;
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default:
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return (FUNC_NUM_IVALID);
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}
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omode = sda->ext_mode & 0x7f;
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debug(D_REDIR,"mopen");
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break;
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default:
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fatal("called int2f11_open for unknown function %x\n",R_AL);
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}
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if (action & 0x02) /* replace/open mode */
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mode |= O_TRUNC;
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debug(D_REDIR, "(%s) action 0x%x mode 0x%x attr 0x%x omode 0x%x \n",
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fname, action, mode, attr, omode);
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if (ustat(fname, &sb) < 0) { /* file does not exist */
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if ((action & 0x10) || (attr & 0x100)) { /* create it */
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sb.st_ino = 0;
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mode |= O_CREAT; /* have to create as we go */
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status = 0x02; /* file created */
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} else {
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return(FILE_NOT_FOUND); /* fail */
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}
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} else {
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if (S_ISDIR(sb.st_mode))
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return(ACCESS_DENIED);
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if ((action & 0x03) && !(attr & 0x100)) { /* exists, work with it */
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if (action & 0x02) {
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if (!S_ISREG(sb.st_mode)) { /* only allowed for files */
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debug(D_FILE_OPS,"attempt to truncate non-regular file\n");
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return(ACCESS_DENIED);
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}
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status = 0x03; /* we're going to truncate it */
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} else {
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status = 0x01; /* just open it */
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}
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} else {
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return(FILE_ALREADY_EXISTS); /* exists, fail */
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}
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}
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if ((fd = open(fname, mode, from_dos_attr(attr))) < 0) {
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debug(D_FILE_OPS,"failed to open %s : %s\n",fname,strerror(errno));
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return (ACCESS_DENIED);
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}
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if (R_AL == 0x2e) /* extended wants status returned */
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R_CX = status;
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/* black magic to populate the SFT */
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e = p = sda->filename1 + 2; /* parse name */
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while (*p) {
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if (*p++ == '\\') /* look for beginning of filename */
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e = p;
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}
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for (i = 0; i < 8; ++i) { /* copy name and pad with spaces */
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if (*e && *e != '.')
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r_sft->name[i] = *e++;
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else
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r_sft->name[i] = ' ';
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}
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if (*e == '.') /* skip period on short names */
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++e;
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for (i = 0; i < 3; ++i) { /* copy extension and pad with spaces */
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if (*e)
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r_sft->ext[i] = *e++;
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else
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r_sft->ext[i] = ' ';
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}
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if (ustat(fname, &sb) < 0) /* re-stat to be accurate */
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return(WRITE_FAULT); /* any better ideas?! */
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r_sft->open_mode = omode; /* file open mode */
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*(u_long *)r_sft->ddr_dpb = 0; /* no parameter block */
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r_sft->size = sb.st_size; /* current size */
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r_sft->fd = fd; /* our fd for it (hidden in starting cluster number) */
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r_sft->offset = 0; /* current offset is 0 */
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*(u_short *)r_sft->dir_sector = 0; /* not local file, ignored */
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r_sft->dir_entry = 0; /* not local file, ignored */
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r_sft->attribute = attr & 0xff; /* file attributes as requested */
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r_sft->info = r_drive + 0x8040; /* hide drive number here for later reference */
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encode_dos_file_time(sb.st_mtime, &r_sft->date, &r_sft->time);
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debug(D_REDIR,"success, fd %d status %x\n", fd, status);
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return(0);
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}
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/*
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** 2f:11:19 2f:11:1b
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**
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** find first
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*/
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static int
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int2f11_findfirst(regcontext_t *REGS __unused)
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{
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return(find_first(sda->filename1,sda->attrmask,
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(dosdir_t *)sda->foundentry,
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(find_block_t *)sda->findfirst));
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}
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/*
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** 2f:11:1c
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**
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** find next
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*/
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static int
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int2f11_findnext(regcontext_t *REGS __unused)
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{
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return(find_next((dosdir_t *)sda->foundentry,
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(find_block_t *)sda->findfirst));
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}
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/*
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** 2f:11:21
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**
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** lseek
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*/
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static int
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int2f11_lseek(regcontext_t *REGS)
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{
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int fd;
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off_t offset;
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fd = r_sft->fd;
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offset = (off_t) ((int) ((R_CX << 16) + R_DX));
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debug(D_REDIR,"lseek(%d, 0x%qx, SEEK_END)\n", fd, offset);
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if ((offset = lseek(fd, offset, SEEK_END)) < 0) {
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if (errno == EBADF)
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return(HANDLE_INVALID);
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else
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return(SEEK_ERROR);
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}
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r_sft->offset = offset; /* update offset in SFT */
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R_DX = offset >> 16;
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R_AX = offset;
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return(0);
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}
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/*
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** 2f:11:23
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**
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** qualify filename
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*/
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static int
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int2f11_fnqual(regcontext_t *REGS)
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{
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char *fname;
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char *tname;
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static char errmsg[] = "(failed)";
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int savedrive;
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int error;
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return(PATH_NOT_FOUND);
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savedrive = diskdrive; /* to get CWD for network drive */
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diskdrive = n_drive;
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fname = (char *)MAKEPTR(R_DS, R_SI); /* path pointers */
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tname = (char *)MAKEPTR(R_ES, R_DI);
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error = dos_makepath(fname, tname);
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if (error)
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tname = errmsg;
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diskdrive = savedrive; /* restore correct drive */
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debug(D_REDIR, "qualify '%s' -> '%s'\n", fname, tname);
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return(error);
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}
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/*
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** 2f:11:??
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**
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** Null function - we know about it but do nothing
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*/
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static int
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int2f11_NULLFUNC(regcontext_t *REGS __unused)
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{
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return(0);
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}
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/*
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** 2f:11:??
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**
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** no function - not handled here (error)
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*/
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static int
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int2f11_NOFUNC(regcontext_t *REGS __unused)
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{
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return(-1);
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}
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struct intfunc_table int2f11_table[] = {
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{ 0x00, IFT_NOSUBFUNC, int2f11_00, "installation check"},
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{ 0x01, IFT_NOSUBFUNC, int2f11_dirfn, "rmdir"},
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{ 0x02, IFT_NOSUBFUNC, int2f11_dirfn, "rmdir"},
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{ 0x03, IFT_NOSUBFUNC, int2f11_dirfn, "mkdir"},
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{ 0x04, IFT_NOSUBFUNC, int2f11_dirfn, "mkdir"},
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{ 0x05, IFT_NOSUBFUNC, int2f11_dirfn, "chdir"},
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{ 0x06, IFT_NOSUBFUNC, int2f11_close, "close"},
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{ 0x07, IFT_NOSUBFUNC, int2f11_NULLFUNC, "commit file"},
|
|
{ 0x08, IFT_NOSUBFUNC, int2f11_rdwr, "read"},
|
|
{ 0x09, IFT_NOSUBFUNC, int2f11_rdwr, "write"},
|
|
{ 0x0a, IFT_NOSUBFUNC, int2f11_NULLFUNC, "lock region"},
|
|
{ 0x0b, IFT_NOSUBFUNC, int2f11_NULLFUNC, "unlock region"},
|
|
{ 0x0c, IFT_NOSUBFUNC, int2f11_free, "free space"},
|
|
{ 0x0e, IFT_NOSUBFUNC, int2f11_NULLFUNC, "chmod"},
|
|
{ 0x0f, IFT_NOSUBFUNC, int2f11_stat, "stat"},
|
|
{ 0x11, IFT_NOSUBFUNC, int2f11_dirfn, "rename"},
|
|
{ 0x13, IFT_NOSUBFUNC, int2f11_dirfn, "unlink"},
|
|
{ 0x16, IFT_NOSUBFUNC, int2f11_open, "open"},
|
|
{ 0x17, IFT_NOSUBFUNC, int2f11_open, "creat"},
|
|
{ 0x18, IFT_NOSUBFUNC, int2f11_open, "creat"},
|
|
{ 0x19, IFT_NOSUBFUNC, int2f11_findfirst, "find first"},
|
|
{ 0x1b, IFT_NOSUBFUNC, int2f11_findfirst, "find first"},
|
|
{ 0x1c, IFT_NOSUBFUNC, int2f11_findnext, "find next"},
|
|
{ 0x1d, IFT_NOSUBFUNC, int2f11_NULLFUNC, "close all (abort)"},
|
|
{ 0x1e, IFT_NOSUBFUNC, int2f11_NULLFUNC, "do redirection"},
|
|
{ 0x1f, IFT_NOSUBFUNC, int2f11_NULLFUNC, "printer setup"},
|
|
{ 0x20, IFT_NOSUBFUNC, int2f11_NULLFUNC, "flush all buffers"},
|
|
{ 0x21, IFT_NOSUBFUNC, int2f11_lseek, "lseek"},
|
|
{ 0x22, IFT_NOSUBFUNC, int2f11_NULLFUNC, "process terminated"},
|
|
{ 0x23, IFT_NOSUBFUNC, int2f11_fnqual, "qualify filename"},
|
|
{ 0x24, IFT_NOSUBFUNC, int2f11_NOFUNC, "turn off printer"},
|
|
{ 0x25, IFT_NOSUBFUNC, int2f11_NOFUNC, "printer mode"},
|
|
{ 0x2d, IFT_NOSUBFUNC, int2f11_NOFUNC, "extended attributes"},
|
|
{ 0x2e, IFT_NOSUBFUNC, int2f11_open, "extended open/create"},
|
|
{ -1, 0, NULL, NULL}
|
|
};
|
|
|
|
static int int2f11_fastlookup[256];
|
|
|
|
/******************************************************************************
|
|
** 2f:11
|
|
**
|
|
** The DOS redirector interface.
|
|
*/
|
|
|
|
/*
|
|
** Verify that the drive being referenced is one we are handling, and
|
|
** establish some state for upcoming functions.
|
|
**
|
|
** Returns 1 if we should handle this request.
|
|
**
|
|
** XXX this is rather inefficient, but much easier to read than the previous
|
|
** incarnation 8(
|
|
*/
|
|
static int
|
|
int2f11_validate(regcontext_t *REGS)
|
|
{
|
|
int func = R_AL;
|
|
const char *path = NULL;
|
|
int doit = 0;
|
|
|
|
/* defaults may help trap problems */
|
|
r_cds = NULL;
|
|
r_sft = NULL;
|
|
r_drive = -1;
|
|
|
|
/* some functions we accept regardless */
|
|
switch (func) {
|
|
case 0x00: /* installation check */
|
|
case 0x23: /* qualify path */
|
|
case 0x1c: /* XXX really only valid if a search already started... */
|
|
return(1);
|
|
}
|
|
|
|
/* Where's the CDS? */
|
|
switch(func) {
|
|
case 0x01: /* referenced by the SDA */
|
|
case 0x02:
|
|
case 0x03:
|
|
case 0x04:
|
|
case 0x05:
|
|
case 0x0e:
|
|
case 0x0f:
|
|
case 0x11:
|
|
case 0x13:
|
|
case 0x17:
|
|
case 0x1b:
|
|
r_cds = (CDS *)MAKEPTR(sda->cds_seg, sda->cds_off);
|
|
break;
|
|
|
|
case 0x0c: /* in es:di */
|
|
case 0x1c:
|
|
r_cds = (CDS *)MAKEPTR(R_ES, R_DI);
|
|
break;
|
|
}
|
|
|
|
/* Where's the SFT? */
|
|
switch(func) {
|
|
case 0x06: /* in es:di */
|
|
case 0x07:
|
|
case 0x08:
|
|
case 0x09:
|
|
case 0x0a:
|
|
case 0x0b:
|
|
case 0x16:
|
|
case 0x17:
|
|
case 0x18:
|
|
case 0x21:
|
|
case 0x2d:
|
|
case 0x2e:
|
|
r_sft = (SFT *)MAKEPTR(R_ES, R_DI);
|
|
break;
|
|
}
|
|
|
|
/* What drive? */
|
|
switch(func) {
|
|
case 0x01: /* get drive from fully-qualified path in SDA */
|
|
case 0x02:
|
|
case 0x03:
|
|
case 0x04:
|
|
case 0x05:
|
|
case 0x0c:
|
|
case 0x0e:
|
|
case 0x0f:
|
|
case 0x11:
|
|
case 0x13:
|
|
case 0x16:
|
|
case 0x17:
|
|
case 0x18:
|
|
case 0x19:
|
|
case 0x1b:
|
|
case 0x2e:
|
|
path = sda->filename1;
|
|
break;
|
|
|
|
case 0x06: /* get drive from SFT (we put it here when file was opened) */
|
|
case 0x07:
|
|
case 0x08:
|
|
case 0x09:
|
|
case 0x0a:
|
|
case 0x0b:
|
|
case 0x21:
|
|
case 0x2d:
|
|
r_drive = r_sft->info & 0x1f;
|
|
break;
|
|
}
|
|
|
|
if (path) { /* we have a path and need to determine the drive it refers to */
|
|
|
|
if (path[1] != ':') { /* must be fully qualified; we cannot handle this */
|
|
debug(D_REDIR,"attempt to work non-absolute path %s\n",path);
|
|
return(0);
|
|
}
|
|
|
|
/* translate letter to drive number */
|
|
r_drive = drlton(path[0]);
|
|
} else {
|
|
path = "(no path)";
|
|
}
|
|
|
|
/* do we handle this drive? */
|
|
if (dos_getcwd(r_drive)) {
|
|
n_drive = r_drive; /* XXX GROSTIC HACK ALERT */
|
|
doit = 1;
|
|
}
|
|
|
|
debug(D_REDIR,"%s -> drive %c func %x (%sus)\n",
|
|
path, drntol(r_drive), func, doit?"":"not ");
|
|
|
|
/* so do we deal with this one? */
|
|
return(doit);
|
|
}
|
|
|
|
|
|
int
|
|
int2f_11(regcontext_t *REGS)
|
|
{
|
|
int idx;
|
|
int error;
|
|
|
|
if (!sda) { /* not initialised yet */
|
|
error = FUNC_NUM_IVALID;
|
|
} else {
|
|
|
|
idx = intfunc_find(int2f11_table, int2f11_fastlookup, R_AL, 0);
|
|
if (idx == -1) {
|
|
debug(D_ALWAYS,"no handler for int2f:11:%x\n", R_AL);
|
|
return(0);
|
|
}
|
|
reset_poll();
|
|
|
|
|
|
if (!int2f11_validate(REGS)) { /* determine whether we handle this request */
|
|
error = -1; /* not handled by us */
|
|
} else {
|
|
debug(D_REDIR, "REDIR: %02x (%s)\n",
|
|
int2f11_table[idx].func, int2f11_table[idx].desc);
|
|
/* call the handler */
|
|
error = int2f11_table[idx].handler(REGS);
|
|
if (error != -1)
|
|
debug(D_REDIR, "REDIR: returns %d (%s)\n",
|
|
error, ((error >= 0) && (error <= dos_ret_size)) ? dos_return[error] : "unknown");
|
|
}
|
|
}
|
|
|
|
if (error == -1)
|
|
return (0);
|
|
if (error) {
|
|
R_AX = error;
|
|
R_FLAGS |= PSL_C;
|
|
} else
|
|
R_FLAGS &= ~PSL_C;
|
|
return (1);
|
|
}
|
|
|
|
/******************************************************************************
|
|
** intff handler.
|
|
**
|
|
** intff is the (secret, proprietary, internal, evil) call to
|
|
** initialise the redirector.
|
|
*/
|
|
static void
|
|
install_drive(int drive, u_char *path)
|
|
{
|
|
CDS *cds;
|
|
|
|
/* check that DOS considers this a valid drive */
|
|
if (drive < 0 || drive >= lol->lastdrive) {
|
|
debug(D_REDIR, "Drive %c beyond limit of %c\n",
|
|
drntol(drive), drntol(lol->lastdrive - 1));
|
|
return;
|
|
}
|
|
|
|
/* get the CDS for this drive */
|
|
cds = (CDS *)MAKEPTR(lol->cds_seg, lol->cds_offset);
|
|
cds += drive;
|
|
|
|
#if 0 /* XXX looks OK to me - mjs */
|
|
if (cds->flag & (CDS_remote | CDS_ready)) {
|
|
debug(D_REDIR, "Drive %c already installed\n", drntol(drive));
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
debug(D_REDIR, "Installing %c: as %s\n", drntol(drive), path);
|
|
|
|
cds->flag |= CDS_remote | CDS_ready | CDS_notnet;
|
|
cds->path[0] = drntol(drive);
|
|
cds->path[1] = ':';
|
|
cds->path[2] = '\\';
|
|
cds->path[3] = '\0';
|
|
cds->offset = 2; /* offset of \ in current path field */
|
|
}
|
|
|
|
static void
|
|
init_drives(void)
|
|
{
|
|
int drive;
|
|
u_char *path;
|
|
|
|
/* for all possible drives */
|
|
for (drive = 0; drive < 26; ++drive) {
|
|
if ((path = dos_getpath(drive)) != 0) /* assigned to a path? */
|
|
install_drive(drive, path); /* make it visible to DOS */
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
intff(regcontext_t *REGS)
|
|
{
|
|
|
|
if (lol && sda) { /* already been called? */
|
|
debug(D_REDIR, "redirector duplicate install ignored");
|
|
return;
|
|
}
|
|
lol = (LOL *)MAKEPTR(R_BX, R_DX); /* where DOS keeps its goodies */
|
|
sda = (SDA *)MAKEPTR(R_DI, R_SI);
|
|
init_drives();
|
|
|
|
/* initialise dispatcher */
|
|
intfunc_init(int2f11_table, int2f11_fastlookup);
|
|
}
|