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rufus/src/ms-sys/ntfs.c

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/******************************************************************
Copyright (C) 2012 Pete Batard <pete@akeo.ie>
Based on fat16.c Copyright (C) 2009 Henrik Carlqvist
This program 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 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
******************************************************************/
#include <stdio.h>
#include <string.h>
#include "file.h"
#include "ntfs.h"
int is_ntfs_fs(FILE *fp)
{
unsigned char aucMagic[] = {'N','T','F','S',' ',' ',' ',' '};
return contains_data(fp, 0x03, aucMagic, sizeof(aucMagic));
} /* is_ntfs_fs */
int is_ntfs_br(FILE *fp)
{
/* A "file" is probably some kind of NTFS boot record if it contains the
magic chars 0x55, 0xAA at positions 0x1FE */
unsigned char aucRef[] = {0x55, 0xAA};
unsigned char aucMagic[] = {'N','T','F','S',' ',' ',' ',' '};
if( ! contains_data(fp, 0x1FE, aucRef, sizeof(aucRef)))
return 0;
if( ! contains_data(fp, 0x03, aucMagic, sizeof(aucMagic)))
return 0;
return 1;
} /* is_ntfs_br */
int entire_ntfs_br_matches(FILE *fp)
{
#include "br_ntfs_0x0.h"
#include "br_ntfs_0x54.h"
return
( contains_data(fp, 0x0, br_ntfs_0x0, sizeof(br_ntfs_0x0)) &&
/* BIOS Parameter Block might differ between systems */
contains_data(fp, 0x54, br_ntfs_0x54, sizeof(br_ntfs_0x54)) );
} /* entire_ntfs_br_matches */
int write_ntfs_br(FILE *fp)
{
#include "br_ntfs_0x0.h"
#include "br_ntfs_0x54.h"
return
( write_data(fp, 0x0, br_ntfs_0x0, sizeof(br_ntfs_0x0)) &&
/* BIOS Parameter Block should not be overwritten */
write_data(fp, 0x54, br_ntfs_0x54, sizeof(br_ntfs_0x54)) );
} /* write_ntsf_br */