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/* ----------------------------------------------------------------------- *
*
* Copyright 2009 Pierre-Alexandre Meyer
*
* This file is part of Syslinux, and is made available under
* the terms of the GNU General Public License version 2.
*
* ----------------------------------------------------------------------- */
#include <disk/common.h>
#include <disk/geom.h>
#include <disk/read.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
/**
* get_mbr_string - return a string describing the boot code
* @label: first four bytes of the MBR
* @buffer: pre-allocated buffer
* @buffer_size: @buffer size
**/
void get_mbr_string(const uint32_t label, char* buffer, const int buffer_size)
{
/* 2 bytes are usually enough to identify the MBR */
uint16_t s_label = label >> 16;
switch (s_label) {
case 0x0000:
case 0xfa33:
case 0xfab8:
case 0xfabe:
strncpy(buffer, "No bootloader", buffer_size - 1); break;
case 0x0ebe: strncpy(buffer, "ThinkPad", buffer_size - 1); break;
case 0x31c0: strncpy(buffer, "Acer 3", buffer_size - 1); break;
case 0x33c0: strncpy(buffer, "Windows", buffer_size - 1); break;
case 0x33ff: strncpy(buffer, "HP/Gateway", buffer_size - 1); break;
case 0xb800: strncpy(buffer, "Plop", buffer_size - 1); break;
case 0xea1e: strncpy(buffer, "Truecrypt Boot Loader", buffer_size - 1); break;
case 0xeb04: strncpy(buffer, "Solaris", buffer_size - 1); break;
case 0xeb48: strncpy(buffer, "Grub", buffer_size - 1); break;
case 0xeb4c: strncpy(buffer, "Grub2", buffer_size - 1); break;
case 0xeb5e: strncpy(buffer, "Grub4Dos", buffer_size - 1); break;
case 0xfa31:
/* We need more than 2 bytes */
if ((label >> 8) & 0xff == 0xc9)
strncpy(buffer, "Master Boot LoaDeR", buffer_size - 1);
else if ((label >> 8) & 0xff == 0xc0)
strncpy(buffer, "Syslinux", buffer_size - 1);
else
strncpy(buffer, "Unknown mbr", buffer_size - 1); break;
break;
case 0xfaeb: strncpy(buffer, "Lilo", buffer_size - 1); break;
case 0xfc31: strncpy(buffer, "Testdisk", buffer_size - 1); break;
case 0xfc33: strncpy(buffer, "Gag", buffer_size - 1); break;
case 0xfceb: strncpy(buffer, "BootIT NG", buffer_size - 1); break;
default: strncpy(buffer, "Unknown mbr", buffer_size - 1); break;
}
buffer[buffer_size - 1] = '\0';
}
/**
* get_mbr_id - return the first four bytes of the MBR
* @d: driveinfo struct describing the drive
**/
uint32_t get_mbr_id(const struct driveinfo *d)
{
char mbr[SECTOR * sizeof(char)];
if (read_mbr(d->disk, &mbr) == -1)
return -1;
else {
uint32_t mbr_id;
/* Reverse the opcodes */
mbr_id = (*(uint8_t *) (mbr + 3));
mbr_id += (*(uint8_t *) (mbr + 2) << 8);
mbr_id += (*(uint8_t *) (mbr + 1) << 16);
mbr_id += (*(uint8_t *) mbr) << 24;
return mbr_id;
}
}
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