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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 <string.h>
#include <sys/stat.h>
#include "dos_io.h"
int dos_fstat(dos_fd_t fd, struct stat *st)
{
int err;
int actual = 0;
struct real_call_data real_call_data;
vm_offset_t old_pos, new_pos;
dos_init_rcd(&real_call_data);
bzero(st, sizeof(*st));
st->st_nlink = 1;
st->st_mode = S_IRWXU | S_IRWXG | S_IRWXO; /* XXX attributes */
/* Get device information,
which will tell us whether this is a character device
or a regular file. */
real_call_data.eax = 0x4400;
real_call_data.ebx = fd;
real_int(0x21, &real_call_data);
if (err = dos_check_err(&real_call_data))
return err;
if (real_call_data.edx & (1<<7))
st->st_mode |= S_IFCHR;
else
st->st_mode |= S_IFREG;
/* XXX get date/time with int 21 5700 */
/* Get file size by seeking to the end and back. */
if (!dos_seek(fd, 0, 1, &old_pos)
&& !dos_seek(fd, 0, 2, &st->st_size))
{
if (err = dos_seek(fd, old_pos, 0, &new_pos))
return err;
if (new_pos != old_pos)
return EIO;/*XXX*/
}
/* Always assume 512-byte blocks for now... */
st->st_blocks = (st->st_size + 511) / 512;
st->st_blksize = 512;
return 0;
}
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