509 lines
19 KiB
C++
509 lines
19 KiB
C++
/*
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Copyright (C) <2010> <Roderick W. Smith>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* This class implements an interactive text-mode interface atop the
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GPTData class */
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#include <string.h>
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#include <errno.h>
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#include <iostream>
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#include <sstream>
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#include <cstdio>
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#include "attributes.h"
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#include "gpttext.h"
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using namespace std;
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/*******************************************
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* *
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* GPTDataText class and related structures *
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* *
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********************************************/
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GPTDataTextUI::GPTDataTextUI(void) : GPTData() {
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} // default constructor
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GPTDataTextUI::GPTDataTextUI(string filename) : GPTData(filename) {
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} // constructor passing filename
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GPTDataTextUI::~GPTDataTextUI(void) {
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} // default destructor
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/*********************************************************************
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* *
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* The following functions are extended (interactive) versions of *
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* simpler functions in the base class.... *
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* *
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*********************************************************************/
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// Overridden function; calls base-class function and then makes
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// additional queries of the user, if the base-class function can't
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// decide what to do.
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WhichToUse GPTDataTextUI::UseWhichPartitions(void) {
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WhichToUse which;
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MBRValidity mbrState;
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int answer;
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which = GPTData::UseWhichPartitions();
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if ((which != use_abort) || beQuiet)
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return which;
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// If we get past here, it means that the non-interactive tests were
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// inconclusive, so we must ask the user which table to use....
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mbrState = protectiveMBR.GetValidity();
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if ((state == gpt_valid) && (mbrState == mbr)) {
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cout << "Found valid MBR and GPT. Which do you want to use?\n";
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answer = GetNumber(1, 3, 2, " 1 - MBR\n 2 - GPT\n 3 - Create blank GPT\n\nYour answer: ");
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if (answer == 1) {
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which = use_mbr;
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} else if (answer == 2) {
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which = use_gpt;
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cout << "Using GPT and creating fresh protective MBR.\n";
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} else which = use_new;
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} // if
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// Nasty decisions here -- GPT is present, but corrupt (bad CRCs or other
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// problems)
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if (state == gpt_corrupt) {
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if ((mbrState == mbr) || (mbrState == hybrid)) {
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cout << "Found valid MBR and corrupt GPT. Which do you want to use? (Using the\n"
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<< "GPT MAY permit recovery of GPT data.)\n";
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answer = GetNumber(1, 3, 2, " 1 - MBR\n 2 - GPT\n 3 - Create blank GPT\n\nYour answer: ");
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if (answer == 1) {
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which = use_mbr;
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} else if (answer == 2) {
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which = use_gpt;
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} else which = use_new;
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} else if (mbrState == invalid) {
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cout << "Found invalid MBR and corrupt GPT. What do you want to do? (Using the\n"
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<< "GPT MAY permit recovery of GPT data.)\n";
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answer = GetNumber(1, 2, 1, " 1 - GPT\n 2 - Create blank GPT\n\nYour answer: ");
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if (answer == 1) {
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which = use_gpt;
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} else which = use_new;
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} // if/else/else
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} // if (corrupt GPT)
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return which;
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} // UseWhichPartitions()
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// Ask the user for a partition number; and prompt for verification
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// if the requested partition isn't of a known BSD type.
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// Lets the base-class function do the work, and returns its value (the
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// number of converted partitions).
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int GPTDataTextUI::XFormDisklabel(void) {
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uint32_t partNum;
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uint16_t hexCode;
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int goOn = 1, numDone = 0;
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BSDData disklabel;
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partNum = GetPartNum();
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// Now see if the specified partition has a BSD type code....
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hexCode = partitions[partNum].GetHexType();
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if ((hexCode != 0xa500) && (hexCode != 0xa900)) {
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cout << "Specified partition doesn't have a disklabel partition type "
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<< "code.\nContinue anyway? ";
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goOn = (GetYN() == 'Y');
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} // if
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if (goOn)
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numDone = GPTData::XFormDisklabel(partNum);
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return numDone;
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} // GPTData::XFormDisklabel(int i)
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/*********************************************************************
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* *
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* Begin functions that obtain information from the users, and often *
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* do something with that information (call other functions) *
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* *
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*********************************************************************/
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// Prompts user for partition number and returns the result.
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uint32_t GPTDataTextUI::GetPartNum(void) {
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uint32_t partNum;
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uint32_t low, high;
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ostringstream prompt;
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if (GetPartRange(&low, &high) > 0) {
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prompt << "Partition number (" << low + 1 << "-" << high + 1 << "): ";
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partNum = GetNumber(low + 1, high + 1, low, prompt.str());
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} else partNum = 1;
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return (partNum - 1);
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} // GPTDataTextUI::GetPartNum()
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// What it says: Resize the partition table. (Default is 128 entries.)
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void GPTDataTextUI::ResizePartitionTable(void) {
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int newSize;
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ostringstream prompt;
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uint32_t curLow, curHigh;
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cout << "Current partition table size is " << mainHeader.numParts << ".\n";
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GetPartRange(&curLow, &curHigh);
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curHigh++; // since GetPartRange() returns numbers starting from 0...
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// There's no point in having fewer than four partitions....
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if (curHigh < (blockSize / GPT_SIZE))
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curHigh = blockSize / GPT_SIZE;
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prompt << "Enter new size (" << curHigh << " up, default " << NUM_GPT_ENTRIES << "): ";
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newSize = GetNumber(4, 65535, 128, prompt.str());
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if (newSize < 128) {
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cout << "Caution: The partition table size should officially be 16KB or larger,\n"
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<< "which works out to 128 entries. In practice, smaller tables seem to\n"
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<< "work with most OSes, but this practice is risky. I'm proceeding with\n"
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<< "the resize, but you may want to reconsider this action and undo it.\n\n";
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} // if
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SetGPTSize(newSize);
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} // GPTDataTextUI::ResizePartitionTable()
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// Interactively create a partition
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void GPTDataTextUI::CreatePartition(void) {
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uint64_t firstBlock, firstInLargest, lastBlock, sector;
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uint32_t firstFreePart = 0;
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ostringstream prompt1, prompt2, prompt3;
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int partNum;
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// Find first free partition...
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while (partitions[firstFreePart].GetFirstLBA() != 0) {
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firstFreePart++;
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} // while
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if (((firstBlock = FindFirstAvailable()) != 0) &&
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(firstFreePart < mainHeader.numParts)) {
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lastBlock = FindLastAvailable();
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firstInLargest = FindFirstInLargest();
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// Get partition number....
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do {
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prompt1 << "Partition number (" << firstFreePart + 1 << "-" << mainHeader.numParts
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<< ", default " << firstFreePart + 1 << "): ";
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partNum = GetNumber(firstFreePart + 1, mainHeader.numParts,
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firstFreePart + 1, prompt1.str()) - 1;
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if (partitions[partNum].GetFirstLBA() != 0)
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cout << "partition " << partNum + 1 << " is in use.\n";
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} while (partitions[partNum].GetFirstLBA() != 0);
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// Get first block for new partition...
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prompt2 << "First sector (" << firstBlock << "-" << lastBlock << ", default = "
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<< firstInLargest << ") or {+-}size{KMGT}: ";
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do {
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sector = GetSectorNum(firstBlock, lastBlock, firstInLargest, prompt2.str());
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} while (IsFree(sector) == 0);
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Align(§or); // Align sector to correct multiple
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firstBlock = sector;
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// Get last block for new partitions...
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lastBlock = FindLastInFree(firstBlock);
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prompt3 << "Last sector (" << firstBlock << "-" << lastBlock << ", default = "
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<< lastBlock << ") or {+-}size{KMGT}: ";
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do {
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sector = GetSectorNum(firstBlock, lastBlock, lastBlock, prompt3.str());
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} while (IsFree(sector) == 0);
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lastBlock = sector;
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firstFreePart = GPTData::CreatePartition(partNum, firstBlock, lastBlock);
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partitions[partNum].ChangeType();
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partitions[partNum].SetDefaultDescription();
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} else {
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cout << "No free sectors available\n";
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} // if/else
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} // GPTDataTextUI::CreatePartition()
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// Interactively delete a partition (duh!)
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void GPTDataTextUI::DeletePartition(void) {
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int partNum;
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uint32_t low, high;
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ostringstream prompt;
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if (GetPartRange(&low, &high) > 0) {
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prompt << "Partition number (" << low + 1 << "-" << high + 1 << "): ";
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partNum = GetNumber(low + 1, high + 1, low, prompt.str());
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GPTData::DeletePartition(partNum - 1);
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} else {
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cout << "No partitions\n";
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} // if/else
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} // GPTDataTextUI::DeletePartition()
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// Prompt user for a partition number, then change its type code
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// using ChangeGPTType(struct GPTPartition*) function.
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void GPTDataTextUI::ChangePartType(void) {
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int partNum;
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uint32_t low, high;
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if (GetPartRange(&low, &high) > 0) {
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partNum = GetPartNum();
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partitions[partNum].ChangeType();
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} else {
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cout << "No partitions\n";
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} // if/else
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} // GPTDataTextUI::ChangePartType()
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// Partition attributes seem to be rarely used, but I want a way to
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// adjust them for completeness....
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void GPTDataTextUI::SetAttributes(uint32_t partNum) {
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Attributes theAttr;
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theAttr.SetAttributes(partitions[partNum].GetAttributes());
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theAttr.DisplayAttributes();
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theAttr.ChangeAttributes();
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partitions[partNum].SetAttributes(theAttr.GetAttributes());
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} // GPTDataTextUI::SetAttributes()
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// Ask user for two partition numbers and swap them in the table. Note that
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// this just reorders table entries; it doesn't adjust partition layout on
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// the disk.
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// Returns 1 if successful, 0 if not. (If user enters identical numbers, it
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// counts as successful.)
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int GPTDataTextUI::SwapPartitions(void) {
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int partNum1, partNum2, didIt = 0;
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uint32_t low, high;
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ostringstream prompt;
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GPTPart temp;
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if (GetPartRange(&low, &high) > 0) {
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partNum1 = GetPartNum();
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if (high >= mainHeader.numParts - 1)
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high = 0;
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prompt << "New partition number (1-" << mainHeader.numParts
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<< ", default " << high + 2 << "): ";
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partNum2 = GetNumber(1, mainHeader.numParts, high + 2, prompt.str()) - 1;
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didIt = GPTData::SwapPartitions(partNum1, partNum2);
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} else {
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cout << "No partitions\n";
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} // if/else
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return didIt;
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} // GPTDataTextUI::SwapPartitionNumbers()
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// This function destroys the on-disk GPT structures. Returns 1 if the user
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// confirms destruction, 0 if the user aborts or if there's a disk error.
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int GPTDataTextUI::DestroyGPTwPrompt(void) {
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int allOK = 1;
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if ((apmFound) || (bsdFound)) {
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cout << "WARNING: APM or BSD disklabel structures detected! This operation could\n"
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<< "damage any APM or BSD partitions on this disk!\n";
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} // if APM or BSD
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cout << "\a\aAbout to wipe out GPT on " << device << ". Proceed? ";
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if (GetYN() == 'Y') {
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if (DestroyGPT()) {
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// Note on below: Touch the MBR only if the user wants it completely
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// blanked out. Version 0.4.2 deleted the 0xEE partition and re-wrote
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// the MBR, but this could wipe out a valid MBR that the program
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// had subsequently discarded (say, if it conflicted with older GPT
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// structures).
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cout << "Blank out MBR? ";
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if (GetYN() == 'Y') {
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DestroyMBR();
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} else {
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cout << "MBR is unchanged. You may need to delete an EFI GPT (0xEE) partition\n"
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<< "with fdisk or another tool.\n";
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} // if/else
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} else allOK = 0; // if GPT structures destroyed
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} else allOK = 0; // if user confirms destruction
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return (allOK);
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} // GPTDataTextUI::DestroyGPTwPrompt()
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// Get partition number from user and then call ShowPartDetails(partNum)
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// to show its detailed information
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void GPTDataTextUI::ShowDetails(void) {
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int partNum;
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uint32_t low, high;
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if (GetPartRange(&low, &high) > 0) {
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partNum = GetPartNum();
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ShowPartDetails(partNum);
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} else {
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cout << "No partitions\n";
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} // if/else
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} // GPTDataTextUI::ShowDetails()
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// Create a hybrid MBR -- an ugly, funky thing that helps GPT work with
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// OSes that don't understand GPT.
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void GPTDataTextUI::MakeHybrid(void) {
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uint32_t partNums[3];
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char line[255];
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char* junk;
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int numParts, i, j, mbrNum, bootable = -1;
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int gptParts[4], mbrTypes[4];
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char fillItUp = 'M'; // fill extra partition entries? (Yes/No/Maybe)
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char eeFirst = 'Y'; // Whether EFI GPT (0xEE) partition comes first in table
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cout << "\nWARNING! Hybrid MBRs are flaky and potentially dangerous! If you decide not\n"
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<< "to use one, just hit the Enter key at the below prompt and your MBR\n"
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<< "partition table will be untouched.\n\n\a";
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// Now get the numbers of up to three partitions to add to the
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// hybrid MBR....
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cout << "Type from one to three GPT partition numbers, separated by spaces, to be\n"
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<< "added to the hybrid MBR, in sequence: ";
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junk = fgets(line, 255, stdin);
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numParts = sscanf(line, "%d %d %d", &partNums[0], &partNums[1], &partNums[2]);
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if (numParts > 0) {
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cout << "Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? ";
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eeFirst = GetYN();
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} // if
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for (i = 0; i < 4; i++)
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gptParts[i] = MBR_EMPTY;
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for (i = 0; i < numParts; i++) {
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j = partNums[i] - 1;
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mbrNum = i + (eeFirst == 'Y');
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cout << "\nCreating entry for GPT partition #" << j + 1
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<< " (MBR partition #" << mbrNum + 1 << ")\n";
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gptParts[mbrNum] = j;
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mbrTypes[mbrNum] = GetMBRTypeCode(partitions[j].GetHexType() / 256);
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cout << "Set the bootable flag? ";
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if (GetYN() == 'Y')
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bootable = mbrNum;
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} // for
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if (numParts > 0) { // User opted to create a hybrid MBR....
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// Create EFI protective partition that covers the start of the disk.
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// If this location (covering the main GPT data structures) is omitted,
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// Linux won't find any partitions on the disk.
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if (eeFirst == 'Y')
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mbrNum = 0;
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else
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mbrNum = numParts;
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gptParts[mbrNum] = MBR_EFI_GPT;
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mbrTypes[mbrNum] = 0xEE;
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protectiveMBR.SetHybrid();
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// ... and for good measure, if there are any partition spaces left,
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// optionally create another protective EFI partition to cover as much
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// space as possible....
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for (i = 0; i < 4; i++) {
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if (gptParts[i] == MBR_EMPTY) { // unused entry....
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if (fillItUp == 'M') {
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cout << "\nUnused partition space(s) found. Use one to protect more partitions? ";
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fillItUp = GetYN();
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mbrTypes[i] = 0x00; // use this to flag a need to get type code
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} // if
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if (fillItUp == 'Y') {
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while ((mbrTypes[i] <= 0) || (mbrTypes[i] > 255)) {
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cout << "Enter an MBR hex code (EE is EFI GPT, but may confuse MacOS): ";
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// Comment on above: Mac OS treats disks with more than one
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// 0xEE MBR partition as MBR disks, not as GPT disks.
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junk = fgets(line, 255, stdin);
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sscanf(line, "%x", &mbrTypes[i]);
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if (line[0] == '\n')
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mbrTypes[i] = 0;
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} // while
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gptParts[i] = MBR_EFI_GPT;
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} // if (fillItUp == 'Y')
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} // if unused entry
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} // for (i = 0; i < 4; i++)
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PartsToMBR(gptParts, mbrTypes);
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if (bootable > 0)
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protectiveMBR.SetPartBootable(bootable);
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} // if (numParts > 0)
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} // GPTDataTextUI::MakeHybrid()
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// Convert the GPT to MBR form. This function is necessarily limited; it
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// handles at most four partitions and creates layouts that ignore CHS
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// geometries. Returns the number of converted partitions; if this value
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// is over 0, the calling function should call DestroyGPT() to destroy
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// the GPT data, and then exit.
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int GPTDataTextUI::XFormToMBR(void) {
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char line[255];
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char* junk;
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int j, numParts, bootable = -1, numConverted = 0, numReallyConverted;
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int gptParts[4], mbrTypes[4];
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uint32_t i, partNums[4];
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// Get the numbers of up to four partitions to add to the
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// hybrid MBR....
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numParts = CountParts();
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cout << "Counted " << numParts << " partitions.\n";
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if (numParts > 4) { // Over four partitions; engage in triage
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cout << "Type from one to four GPT partition numbers, separated by spaces, to be\n"
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<< "used in the MBR, in sequence: ";
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junk = fgets(line, 255, stdin);
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numParts = sscanf(line, "%d %d %d %d", &partNums[0], &partNums[1],
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&partNums[2], &partNums[3]);
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} else { // Four or fewer partitions; convert them all
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i = j = 0;
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while ((j < numParts) && (i < mainHeader.numParts)) {
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if (partitions[i].GetFirstLBA() > 0) { // if GPT part. is defined
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partNums[j++] = ++i; // flag it for conversion
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} else i++;
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} // while
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} // if/else
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for (i = 0; i < 4; i++)
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gptParts[i] = MBR_EMPTY;
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for (i = 0; i < (uint32_t) numParts; i++) {
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j = partNums[i] - 1;
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cout << "\nCreating entry for GPT partition #" << j + 1
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<< " (MBR partition #" << i + 1 << ")\n";
|
|
gptParts[i] = j;
|
|
mbrTypes[i] = GetMBRTypeCode(partitions[j].GetHexType() / 256);
|
|
cout << "Set the bootable flag? ";
|
|
if (GetYN() == 'Y')
|
|
bootable = i;
|
|
numConverted++;
|
|
} // for
|
|
numReallyConverted = PartsToMBR(gptParts, mbrTypes);
|
|
if (bootable > 0)
|
|
protectiveMBR.SetPartBootable(bootable);
|
|
if (numReallyConverted == numConverted) {
|
|
protectiveMBR.WriteMBRData(&myDisk);
|
|
} else {
|
|
cerr << "Error converting partitions to MBR; aborting operation!\n";
|
|
numConverted = 0;
|
|
protectiveMBR.MakeProtectiveMBR();
|
|
} // if/else
|
|
return numConverted;
|
|
} // GPTDataTextUI::XFormToMBR()
|
|
|
|
/*********************************************************************
|
|
* *
|
|
* The following doesn't really belong in the class, since it's MBR- *
|
|
* specific, but it's also user I/O-related, so I want to keep it in *
|
|
* this file.... *
|
|
* *
|
|
*********************************************************************/
|
|
|
|
// Get an MBR type code from the user and return it
|
|
int GetMBRTypeCode(int defType) {
|
|
char line[255];
|
|
char* junk;
|
|
int typeCode;
|
|
|
|
cout.setf(ios::uppercase);
|
|
cout.fill('0');
|
|
do {
|
|
cout << "Enter an MBR hex code (default " << hex;
|
|
cout.width(2);
|
|
cout << defType << "): " << dec;
|
|
junk = fgets(line, 255, stdin);
|
|
if (line[0] == '\n')
|
|
typeCode = defType;
|
|
else
|
|
sscanf(line, "%x", &typeCode);
|
|
} while ((typeCode <= 0) || (typeCode > 255));
|
|
cout.fill(' ');
|
|
return typeCode;
|
|
} // GetMBRTypeCode
|