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// sgdisk.cc
// Command-line-based version of gdisk. This program is named after sfdisk,
// and it can serve a similar role (easily scripted, etc.), but it's used
// strictly via command-line arguments, and it doesn't bear much resemblance
// to sfdisk in actual use.
//
// by Rod Smith, project began February 2009; sgdisk begun January 2010.
/* This program is copyright (c) 2009, 2010 by Roderick W. Smith. It is distributed
under the terms of the GNU GPL version 2, as detailed in the COPYING file. */
#include <stdio.h>
#include <string>
#include <popt.h>
#include <errno.h>
#include <iostream>
#include "mbr.h"
#include "gpt.h"
#include "support.h"
#include "parttypes.h"
using namespace std;
#define MAX_OPTIONS 50
uint64_t GetInt(char* Info, int itemNum);
string GetString(char* Info, int itemNum);
int main(int argc, char *argv[]) {
GPTData theGPT;
int opt, numOptions = 0, saveData = 0, neverSaveData = 0;
int partNum = 0, deletePartNum = 0, infoPartNum = 0, bsdPartNum = 0, saveNonGPT = 1;
int alignment = 8, retval = 0, pretend = 0;
unsigned int hexCode;
uint32_t tableSize = 128;
uint64_t startSector, endSector;
char *device = NULL;
char *newPartInfo = NULL, *typeCode = NULL, *partName;
char *backupFile = NULL;
PartType typeHelper;
poptContext poptCon;
struct poptOption theOptions[] =
{
{"set-alignment", 'a', POPT_ARG_INT, &alignment, 'a', "set sector alignment", "value"},
{"backup", 'b', POPT_ARG_STRING, &backupFile, 'b', "backup GPT to file", "file"},
{"change-name", 'c', POPT_ARG_STRING, &partName, 'c', "change partition's name", "partnum:name"},
{"delete", 'd', POPT_ARG_INT, &deletePartNum, 'd', "delete a partition", "partnum"},
{"move-second-header", 'e', POPT_ARG_NONE, NULL, 'e', "move second header to end of disk", ""},
{"end-of-largest", 'E', POPT_ARG_NONE, NULL, 'E', "show end of largest free block", ""},
{"first-in-largest", 'f', POPT_ARG_NONE, NULL, 'f', "show start of the largest free block", ""},
{"mbrtogpt", 'g', POPT_ARG_NONE, NULL, 'g', "convert MBR to GPT", ""},
{"info", 'i', POPT_ARG_INT, &infoPartNum, 'i', "show detailed information on partition", "partnum"},
{"load-backup", 'l', POPT_ARG_STRING, &backupFile, 'l', "load GPT backup from file", "file"},
{"list-types", 'L', POPT_ARG_NONE, NULL, 'L', "list known partition types", ""},
{"new", 'n', POPT_ARG_STRING, &newPartInfo, 'n', "create new partition", "partnum:start:end"},
{"clear", 'o', POPT_ARG_NONE, NULL, 'o', "clear partition table", ""},
{"print", 'p', POPT_ARG_NONE, NULL, 'p', "print partition table", ""},
{"pretend", 'P', POPT_ARG_NONE, NULL, 'P', "make changes in memory, but don't write them", ""},
{"sort", 's', POPT_ARG_NONE, NULL, 's', "sort partition table entries", ""},
{"resize-table", 'S', POPT_ARG_INT, &tableSize, 'S', "resize partition table", "numparts"},
{"typecode", 't', POPT_ARG_STRING, &typeCode, 't', "change partition type code", "partnum:hexcode"},
{"transform-bsd", 'T', POPT_ARG_INT, &bsdPartNum, 'T', "transform BSD disklabel partition to GPT", "partnum"},
{"verify", 'v', POPT_ARG_NONE, NULL, 'v', "check partition table integrity", ""},
{"version", 'V', POPT_ARG_NONE, NULL, 'V', "display version information", ""},
{"zap", 'z', POPT_ARG_NONE, NULL, 'z', "zap (destroy) GPT data structures", ""},
POPT_AUTOHELP { NULL, 0, 0, NULL, 0 }
};
// Create popt context...
poptCon = poptGetContext(NULL, argc, (const char**) argv, theOptions, 0);
poptSetOtherOptionHelp(poptCon, " [OPTION...] <device>");
if (argc < 2) {
poptPrintUsage(poptCon, stderr, 0);
exit(1);
}
// Do one loop through the options to find the device filename and deal
// with options that don't require a device filename....
while ((opt = poptGetNextOpt(poptCon)) > 0) {
switch (opt) {
case 'L':
typeHelper.ShowAllTypes();
break;
case 'P':
pretend = 1;
break;
case 'V':
cout << "GPT fdisk (sgdisk) version " << GPTFDISK_VERSION << "\n\n";
break;
default:
break;
} // switch
numOptions++;
} // while
// Assume first non-option argument is the device filename....
device = (char*) poptGetArg(poptCon);
poptResetContext(poptCon);
if (device != NULL) {
theGPT.JustLooking(); // reset as necessary
theGPT.BeQuiet(); // Tell called functions to be less verbose & interactive
if (theGPT.LoadPartitions((string) device)) {
if ((theGPT.WhichWasUsed() == use_mbr) || (theGPT.WhichWasUsed() == use_bsd))
saveNonGPT = 0; // flag so we don't overwrite unless directed to do so
while ((opt = poptGetNextOpt(poptCon)) > 0) {
switch (opt) {
case 'a':
theGPT.SetAlignment(alignment);
break;
case 'b':
theGPT.SaveGPTBackup(backupFile);
free(backupFile);
break;
case 'c':
theGPT.JustLooking(0);
partNum = (int) GetInt(partName, 1) - 1;
if (theGPT.SetName(partNum, GetString(partName, 2))) {
saveData = 1;
} else {
cerr << "Unable set set partition " << partNum + 1
<< "'s name to '" << GetString(partName, 2) << "'!\n";
neverSaveData = 1;
} // if/else
free(partName);
break;
case 'd':
theGPT.JustLooking(0);
if (theGPT.DeletePartition(deletePartNum - 1) == 0) {
cerr << "Error " << errno << " deleting partition!\n";
neverSaveData = 1;
} else saveData = 1;
break;
case 'e':
theGPT.JustLooking(0);
theGPT.MoveSecondHeaderToEnd();
saveData = 1;
break;
case 'E':
cout << theGPT.FindLastInFree(theGPT.FindFirstInLargest()) << "\n";
break;
case 'f':
cout << theGPT.FindFirstInLargest() << "\n";
break;
case 'g':
theGPT.JustLooking(0);
saveData = 1;
saveNonGPT = 1;
break;
case 'i':
theGPT.ShowPartDetails(infoPartNum - 1);
break;
case 'l':
if (theGPT.LoadGPTBackup((string) backupFile) == 1)
saveData = 1;
else {
saveData = 0;
neverSaveData = 1;
cerr << "Error loading backup file!\n";
} // else
free(backupFile);
break;
case 'L':
break;
case 'n':
theGPT.JustLooking(0);
partNum = (int) GetInt(newPartInfo, 1) - 1;
startSector = GetInt(newPartInfo, 2);
endSector = GetInt(newPartInfo, 3);
if (theGPT.CreatePartition(partNum, startSector, endSector)) {
saveData = 1;
} else {
cerr << "Could not create partition " << partNum << " from "
<< startSector << " to " << endSector << "\n";
neverSaveData = 1;
} // if/else
free(newPartInfo);
break;
case 'o':
theGPT.JustLooking(0);
theGPT.ClearGPTData();
saveData = 1;
break;
case 'p':
theGPT.DisplayGPTData();
break;
case 'P':
pretend = 1;
break;
case 's':
theGPT.JustLooking(0);
theGPT.SortGPT();
saveData = 1;
break;
case 'S':
theGPT.JustLooking(0);
if (theGPT.SetGPTSize(tableSize) == 0)
neverSaveData = 1;
else
saveData = 1;
break;
case 't':
theGPT.JustLooking(0);
partNum = (int) GetInt(typeCode, 1) - 1;
sscanf(GetString(typeCode, 2).c_str(), "%x", &hexCode);
if (theGPT.ChangePartType(partNum, hexCode)) {
saveData = 1;
} else {
cerr << "Could not change partition " << partNum + 1
<< "'s type code to " << hex << hexCode << "!\n" << dec;
neverSaveData = 1;
} // if/else
free(typeCode);
break;
case 'T':
theGPT.JustLooking(0);
theGPT.XFormDisklabel(bsdPartNum);
saveData = 1;
break;
case 'v':
theGPT.Verify();
break;
case 'z':
if (!pretend)
theGPT.DestroyGPT(-1);
saveNonGPT = 0;
break;
default:
cerr << "Unknown option (-" << opt << ")!\n";
break;
} // switch
} // while
if ((saveData) && (!neverSaveData) && (saveNonGPT) && (!pretend))
theGPT.SaveGPTData(1);
if (saveData && (!saveNonGPT)) {
cout << "Non-GPT disk; not saving changes. Use -g to override.\n";
retval = 3;
} // if
if (neverSaveData) {
cerr << "Error encountered; not saving changes.\n";
retval = 4;
} // if
} else { // if loaded OK
retval = 2;
} // if/else loaded OK
} // if (device != NULL)
poptFreeContext(poptCon);
return retval;
} // main
// Extract integer data from argument string, which should be colon-delimited
uint64_t GetInt(char* argument, int itemNum) {
int startPos = -1, endPos = -1;
unsigned long long retval = 0;
string Info;
Info = argument;
while (itemNum-- > 0) {
startPos = endPos + 1;
endPos = Info.find(':', startPos);
}
if (endPos == (int) string::npos)
endPos = Info.length();
endPos--;
sscanf(Info.substr(startPos, endPos - startPos + 1).c_str(), "%llu", &retval);
return retval;
} // GetInt()
// Extract string data from argument string, which should be colon-delimited
string GetString(char* argument, int itemNum) {
int startPos = -1, endPos = -1;
string Info;
Info = argument;
while (itemNum-- > 0) {
startPos = endPos + 1;
endPos = Info.find(':', startPos);
}
if (endPos == (int) string::npos)
endPos = Info.length();
endPos--;
return Info.substr(startPos, endPos - startPos + 1);
} // GetString()
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