978041ca61
Added several features, including a restructuring of the menu system, GPT-to-MBR conversion, and the ability to re-read the MBR to generate a fresh GPT from the current on-disk MBR.
379 lines
13 KiB
C++
379 lines
13 KiB
C++
// gdisk.cc
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// Program modelled after Linux fdisk, but it manipulates GPT partitions
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// rather than MBR partitions.
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//
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// by Rod Smith, project began February 2009
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/* This program is copyright (c) 2009 by Roderick W. Smith. It is distributed
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under the terms of the GNU GPL version 2, as detailed in the COPYING file. */
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//#include <iostream>
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#include <stdio.h>
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#include <string.h>
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#include <getopt.h>
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#include "mbr.h"
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#include "gpt.h"
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#include "support.h"
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// Function prototypes....
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// int ReadPartitions(char* filename, struct GPTData* theGPT);
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void MainMenu(char* filename, struct GPTData* theGPT);
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void ShowCommands(void);
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void ExpertsMenu(char* filename, struct GPTData* theGPT);
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void ShowExpertCommands(void);
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void RecoveryMenu(char* filename, struct GPTData* theGPT);
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void ShowRecoveryCommands(void);
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int main(int argc, char* argv[]) {
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GPTData theGPT;
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int doMore = 1;
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char* device = NULL;
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printf("GPT fdisk (gdisk) version 0.5.0\n\n");
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if (argc == 2) { // basic usage
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if (SizesOK()) {
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doMore = theGPT.LoadPartitions(argv[1]);
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if (doMore) {
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MainMenu(argv[1], &theGPT);
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} // if (doMore)
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} // if (SizesOK())
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} else if (argc == 3) { // usage with "-l" option
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if (SizesOK()) {
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if (strcmp(argv[1], "-l") == 0) {
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device = argv[2];
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} else if (strcmp(argv[2], "-l") == 0) {
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device = argv[1];
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} else { // 3 arguments, but none is "-l"
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fprintf(stderr, "Usage: %s [-l] device_file\n", argv[0]);
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} // if/elseif/else
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if (device != NULL) {
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doMore = theGPT.LoadPartitions(device);
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if (doMore) theGPT.DisplayGPTData();
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} // if
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} // if
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} else {
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fprintf(stderr, "Usage: %s [-l] device_file\n", argv[0]);
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} // if/else
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} // main
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// Accept a command and execute it. Returns only when the user
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// wants to exit (such as after a 'w' or 'q' command).
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void MainMenu(char* filename, struct GPTData* theGPT) {
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char command, line[255], buFile[255];
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int goOn = 1;
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PartTypes typeHelper;
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uint32_t temp1, temp2;
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do {
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printf("\nCommand (? for help): ");
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fgets(line, 255, stdin);
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sscanf(line, "%c", &command);
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switch (command) {
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case 'b': case 'B':
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printf("Enter backup filename to save: ");
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fgets(line, 255, stdin);
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sscanf(line, "%s", &buFile);
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theGPT->SaveGPTBackup(buFile);
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break;
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case 'c': case 'C':
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if (theGPT->GetPartRange(&temp1, &temp2) > 0)
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theGPT->SetName(theGPT->GetPartNum());
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else
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printf("No partitions\n");
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break;
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case 'd': case 'D':
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theGPT->DeletePartition();
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break;
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case 'i': case 'I':
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theGPT->ShowDetails();
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break;
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case 'l': case 'L':
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typeHelper.ShowTypes();
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break;
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case 'n': case 'N':
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theGPT->CreatePartition();
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break;
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case 'o': case 'O':
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printf("This option deletes all partitions and creates a new "
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"protective MBR.\nProceed? ");
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if (GetYN() == 'Y') {
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theGPT->ClearGPTData();
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theGPT->MakeProtectiveMBR();
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} // if
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break;
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case 'p': case 'P':
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theGPT->DisplayGPTData();
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break;
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case 'q': case 'Q':
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goOn = 0;
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break;
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case 'r': case 'R':
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RecoveryMenu(filename, theGPT);
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goOn = 0;
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break;
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case 's': case 'S':
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theGPT->SortGPT();
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printf("You may need to edit /etc/fstab and/or your boot loader configuration!\n");
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break;
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case 't': case 'T':
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theGPT->ChangePartType();
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break;
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case 'v': case 'V':
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if (theGPT->Verify() > 0) { // problems found
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printf("You may be able to correct the problems by using options on the experts\n"
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"menu (press 'x' at the command prompt). Good luck!\n");
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} // if
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break;
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case 'w': case 'W':
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if (theGPT->SaveGPTData() == 1)
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goOn = 0;
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break;
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case 'x': case 'X':
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ExpertsMenu(filename, theGPT);
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goOn = 0;
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break;
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default:
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ShowCommands();
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break;
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} // switch
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} while (goOn);
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} // MainMenu()
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void ShowCommands(void) {
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printf("b\tback up GPT data to a file\n");
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printf("c\tchange a partition's name\n");
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printf("d\tdelete a partition\n");
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printf("i\tshow detailed information on a partition\n");
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printf("l\tlist known partition types\n");
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printf("n\tadd a new partition\n");
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printf("o\tcreate a new empty GUID partition table (GPT)\n");
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printf("p\tprint the partition table\n");
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printf("q\tquit without saving changes\n");
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printf("r\trecovery and transformation options (experts only)\n");
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printf("s\tsort partitions\n");
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printf("t\tchange a partition's type code\n");
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printf("v\tverify disk\n");
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printf("w\twrite table to disk and exit\n");
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printf("x\textra functionality (experts only)\n");
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printf("?\tprint this menu\n");
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} // ShowCommands()
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// Accept a recovery & transformation menu command. Returns only when the user
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// issues an exit command, such as 'w' or 'q'.
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void RecoveryMenu(char* filename, struct GPTData* theGPT) {
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char command, line[255], buFile[255];
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PartTypes typeHelper;
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uint32_t temp1;
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int goOn = 1;
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do {
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printf("\nrecovery/transformation command (? for help): ");
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fgets(line, 255, stdin);
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sscanf(line, "%c", &command);
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switch (command) {
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case 'b': case 'B':
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theGPT->RebuildMainHeader();
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break;
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case 'c': case 'C':
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printf("Warning! This will probably do weird things if you've converted an MBR to\n"
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"GPT form and haven't yet saved the GPT! Proceed? ");
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if (GetYN() == 'Y')
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theGPT->LoadSecondTableAsMain();
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break;
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case 'd': case 'D':
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theGPT->RebuildSecondHeader();
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break;
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case 'e': case 'E':
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printf("Warning! This will probably do weird things if you've converted an MBR to\n"
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"GPT form and haven't yet saved the GPT! Proceed? ");
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if (GetYN() == 'Y')
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theGPT->LoadMainTable();
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break;
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case 'f': case 'F':
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printf("Warning! This will destroy the currently defined partitions! Proceed? ");
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if (GetYN() == 'Y') {
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if (theGPT->LoadMBR(filename) == 1) { // successful load
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theGPT->XFormPartitions();
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} else {
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printf("Problem loading MBR! GPT is untouched; regenerating protective MBR!\n");
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theGPT->MakeProtectiveMBR();
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} // if/else
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} // if
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break;
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case 'g': case 'G':
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temp1 = theGPT->XFormToMBR();
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if (temp1 > 0) {
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printf("Converted %d partitions. Finalize and exit? ", temp1);
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if (GetYN() == 'Y') {
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if (theGPT->DestroyGPT(0) > 0)
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goOn = 0;
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} else {
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theGPT->MakeProtectiveMBR();
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printf("Note: New protective MBR created.\n");
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} // if/else
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} // if
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break;
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case 'h': case 'H':
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theGPT->MakeHybrid();
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break;
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case 'i': case 'I':
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theGPT->ShowDetails();
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break;
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case 'l': case 'L':
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printf("Enter backup filename to load: ");
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fgets(line, 255, stdin);
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sscanf(line, "%s", &buFile);
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theGPT->LoadGPTBackup(buFile);
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break;
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case 'm': case 'M':
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MainMenu(filename, theGPT);
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goOn = 0;
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break;
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case 'o': case 'O':
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theGPT->DisplayMBRData();
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break;
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case 'p': case 'P':
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theGPT->DisplayGPTData();
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break;
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case 'q': case 'Q':
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goOn = 0;
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break;
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case 't': case 'T':
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theGPT->XFormDisklabel();
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break;
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case 'v': case 'V':
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theGPT->Verify();
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break;
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case 'w': case 'W':
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if (theGPT->SaveGPTData() == 1) {
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goOn = 0;
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} // if
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break;
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case 'x': case 'X':
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ExpertsMenu(filename, theGPT);
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goOn = 0;
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break;
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default:
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ShowRecoveryCommands();
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break;
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} // switch
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} while (goOn);
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} // RecoveryMenu()
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void ShowRecoveryCommands(void) {
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printf("b\tuse backup GPT header (rebuilding main)\n");
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printf("c\tload backup partition table from disk (rebuilding main)\n");
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printf("d\tuse main GPT header (rebuilding backup)\n");
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printf("e\tload main partition table from disk (rebuilding backup)\n");
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printf("f\tload MBR and build fresh GPT from it\n");
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printf("g\tconvert GPT into MBR and exit\n");
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printf("h\tmake hybrid MBR\n");
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printf("i\tshow detailed information on a partition\n");
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printf("l\tload partition data from a backup file\n");
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printf("m\treturn to main menu\n");
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printf("o\tprint protective MBR data\n");
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printf("p\tprint the partition table\n");
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printf("q\tquit without saving changes\n");
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printf("t\ttransform BSD disklabel partition\n");
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printf("v\tverify disk\n");
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printf("w\twrite table to disk and exit\n");
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printf("x\textra functionality (experts only)\n");
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printf("?\tprint this menu\n");
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} // ShowRecoveryCommands()
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// Accept an experts' menu command. Returns only after the user
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// selects an exit command, such as 'w' or 'q'.
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void ExpertsMenu(char* filename, struct GPTData* theGPT) {
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char command, line[255];
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PartTypes typeHelper;
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uint32_t pn;
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uint32_t temp1, temp2;
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int goOn = 1;
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do {
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printf("\nExpert command (? for help): ");
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fgets(line, 255, stdin);
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sscanf(line, "%c", &command);
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switch (command) {
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case 'a': case 'A':
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if (theGPT->GetPartRange(&temp1, &temp2) > 0)
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theGPT->SetAttributes(theGPT->GetPartNum());
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else
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printf("No partitions\n");
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break;
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case 'c': case 'C':
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if (theGPT->GetPartRange(&temp1, &temp2) > 0) {
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pn = theGPT->GetPartNum();
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printf("Enter the partition's new unique GUID:\n");
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theGPT->SetPartitionGUID(pn, GetGUID());
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} else printf("No partitions\n");
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break;
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case 'g': case 'G':
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printf("Enter the disk's unique GUID:\n");
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theGPT->SetDiskGUID(GetGUID());
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break;
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case 'i': case 'I':
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theGPT->ShowDetails();
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break;
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case 'm': case 'M':
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MainMenu(filename, theGPT);
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goOn = 0;
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break;
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case 'n': case 'N':
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theGPT->MakeProtectiveMBR();
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break;
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case 'o': case 'O':
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theGPT->DisplayMBRData();
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break;
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case 'p': case 'P':
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theGPT->DisplayGPTData();
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break;
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case 'q': case 'Q':
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goOn = 0;
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break;
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case 'r': case 'R':
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RecoveryMenu(filename, theGPT);
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goOn = 0;
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break;
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case 's': case 'S':
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theGPT->ResizePartitionTable();
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break;
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case 'v': case 'V':
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theGPT->Verify();
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break;
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case 'w': case 'W':
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if (theGPT->SaveGPTData() == 1) {
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goOn = 0;
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} // if
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break;
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case 'z': case 'Z':
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if (theGPT->DestroyGPT() == 1) {
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goOn = 0;
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}
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break;
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default:
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ShowExpertCommands();
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break;
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} // switch
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} while (goOn);
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} // ExpertsMenu()
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void ShowExpertCommands(void) {
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printf("a\tset attributes\n");
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printf("c\tchange partition GUID\n");
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printf("g\tchange disk GUID\n");
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printf("i\tshow detailed information on a partition\n");
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printf("m\treturn to main menu\n");
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printf("n\tcreate a new protective MBR\n");
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printf("o\tprint protective MBR data\n");
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printf("p\tprint the partition table\n");
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printf("q\tquit without saving changes\n");
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printf("r\trecovery and transformation options (experts only)\n");
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printf("s\tresize partition table\n");
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printf("v\tverify disk\n");
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printf("w\twrite table to disk and exit\n");
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printf("z\tzap (destroy) GPT data structures and exit\n");
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printf("?\tprint this menu\n");
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} // ShowExpertCommands()
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