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/*
* Copyright (c) 1995-1994 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
*/
#include <unistd.h>
#include <errno.h>
#include "dos_io.h"
int dos_seek(dos_fd_t fd, vm_offset_t offset, int whence, vm_offset_t *out_newpos)
{
struct real_call_data real_call_data;
int err;
dos_init_rcd(&real_call_data);
real_call_data.eax = 0x4200 | whence;
real_call_data.ebx = fd;
real_call_data.ecx = (unsigned)offset >> 16;
real_call_data.edx = (unsigned)offset & 0xffff;
real_int(0x21, &real_call_data);
if (err = dos_check_err(&real_call_data))
return err;
*out_newpos = (real_call_data.edx << 16) | (real_call_data.eax & 0xffff);
return 0;
}
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