146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 2009 Pierre-Alexandre Meyer
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*
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* This file is part of Syslinux, and is made available under
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* the terms of the GNU General Public License version 2.
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*
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* ----------------------------------------------------------------------- */
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#include <disk/common.h>
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#include <disk/geom.h>
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#include <disk/read.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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/**
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* get_mbr_string - return a string describing the boot code
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* @label: first four bytes of the MBR
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* @buffer: pre-allocated buffer
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* @buffer_size: @buffer size
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**/
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void get_mbr_string(const uint32_t label, char *buffer, const int buffer_size)
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{
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/* 2 bytes are usually enough to identify the MBR */
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uint16_t s_label = label >> 16;
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switch (s_label) {
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case 0x0000:
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case 0xfabe:
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strlcpy(buffer, "No bootloader", buffer_size - 1);
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break;
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case 0x0ebe:
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strlcpy(buffer, "ThinkPad", buffer_size - 1);
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break;
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case 0x31c0:
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strlcpy(buffer, "Acer 3", buffer_size - 1);
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break;
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case 0x33c0:
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/* We need more than 2 bytes */
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if (((label >> 8) & 0xff) == 0x8e)
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strlcpy(buffer, "Windows", buffer_size - 1);
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else if (((label >> 8) & 0xff) == 0x90)
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strlcpy(buffer, "DiskCryptor", buffer_size - 1);
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else if (((label >> 8) & 0xff) == 0xfa)
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strlcpy(buffer, "Syslinux", buffer_size - 1);
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else
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strlcpy(buffer, "Unknown mbr", buffer_size - 1);
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break;
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case 0x33ed:
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strlcpy(buffer, "Syslinux ISOhybrid", buffer_size - 1);
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break;
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case 0x33ff:
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strlcpy(buffer, "HP/Gateway", buffer_size - 1);
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break;
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case 0xb800:
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strlcpy(buffer, "PloP", buffer_size - 1);
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break;
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case 0xea05:
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strlcpy(buffer, "XOSL", buffer_size - 1);
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break;
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case 0xea1e:
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strlcpy(buffer, "Truecrypt Boot Loader", buffer_size - 1);
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break;
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case 0xeb04:
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strlcpy(buffer, "Solaris", buffer_size - 1);
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break;
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case 0xeb31:
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strlcpy(buffer, "Paragon", buffer_size - 1);
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break;
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case 0xeb48:
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strlcpy(buffer, "Grub", buffer_size - 1);
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break;
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case 0xeb4c:
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strlcpy(buffer, "Grub2 (v1.96)", buffer_size - 1);
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break;
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case 0xeb63:
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strlcpy(buffer, "Grub2 (v1.97)", buffer_size - 1);
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break;
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case 0xeb5e:
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/* We need more than 2 bytes */
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if (((label >> 8) & 0xff) == 0x00)
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strlcpy(buffer, "fbinst", buffer_size - 1);
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else if (((label >> 8) & 0xff) == 0x80)
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strlcpy(buffer, "Grub4Dos", buffer_size - 1);
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else if (((label >> 8) & 0xff) == 0x90)
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strlcpy(buffer, "WEE", buffer_size - 1);
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else
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strlcpy(buffer, "Unknown mbr", buffer_size - 1);
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break;
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case 0xfa31:
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/* We need more than 2 bytes */
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if (((label >> 8) & 0xff) == 0xc0)
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strlcpy(buffer, "Syslinux", buffer_size - 1);
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else if (((label >> 8) & 0xff) == 0xc9)
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strlcpy(buffer, "Master Boot LoaDeR", buffer_size - 1);
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else
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strlcpy(buffer, "Unknown mbr", buffer_size - 1);
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break;
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case 0xfa33:
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strlcpy(buffer, "MS-DOS 3.30 through Windows 95 (A)", buffer_size - 1);
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break;
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case 0xfab8:
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strlcpy(buffer, "FreeDOS (eXtended FDisk)", buffer_size - 1);
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break;
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case 0xfaeb:
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strlcpy(buffer, "Lilo", buffer_size - 1);
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break;
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case 0xfc31:
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strlcpy(buffer, "Testdisk", buffer_size - 1);
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break;
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case 0xfc33:
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strlcpy(buffer, "GAG", buffer_size - 1);
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break;
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case 0xfceb:
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strlcpy(buffer, "BootIT NG", buffer_size - 1);
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break;
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default:
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strlcpy(buffer, "Unknown mbr", buffer_size - 1);
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break;
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}
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buffer[buffer_size - 1] = '\0';
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}
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/**
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* get_mbr_id - return the first four bytes of the MBR
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* @d: driveinfo struct describing the drive
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**/
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uint32_t get_mbr_id(const struct driveinfo *d)
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{
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char mbr[SECTOR * sizeof(char)];
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if (read_mbr(d->disk, &mbr) == -1)
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return -1;
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else {
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uint32_t mbr_id;
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/* Reverse the opcodes */
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mbr_id = (*(uint8_t *) (mbr + 3));
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mbr_id += (*(uint8_t *) (mbr + 2) << 8);
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mbr_id += (*(uint8_t *) (mbr + 1) << 16);
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mbr_id += (*(uint8_t *) mbr) << 24;
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return mbr_id;
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}
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}
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