e4ac11ebee
Adds relative partition sizing and placement options for both start and end sectors; improves hybrid MBR synchronization (deletes matching MBR partition when a GPT partition is deleted, warns about inconsistencies when verifying or writing a partition table).
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/* 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 <stdint.h>
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#include <unistd.h>
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#include <stdlib.h>
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#if defined (__FreeBSD__) || defined (__APPLE__)
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// Darwin (Mac OS) only: disk IOCTLs are different, and there is no lseek64
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// This used to use __DARWIN_UNIX03 rather than __APPLE__, but __APPLE__
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// is more general. If the code fails to work on older versions of OS X/
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// Darwin, this may need to be changed back (and in various .cc files).
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#include <sys/disk.h>
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#define lseek64 lseek
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#else
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// Linux only....
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#include <linux/fs.h>
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#endif
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#include <string>
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#ifndef __GPTSUPPORT
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#define __GPTSUPPORT
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// Set this as a default
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#define SECTOR_SIZE UINT32_C(512)
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// Signatures for Apple (APM) disks, multiplied by 0x100000000
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#define APM_SIGNATURE1 UINT64_C(0x00004D5000000000)
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#define APM_SIGNATURE2 UINT64_C(0x0000535400000000)
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/**************************
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* Some GPT constants.... *
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**************************/
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#define GPT_SIGNATURE UINT64_C(0x5452415020494645)
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// Number and size of GPT entries...
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#define NUM_GPT_ENTRIES 128
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#define GPT_SIZE 128
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#define HEADER_SIZE 92
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#define GPT_RESERVED 420
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#define NAME_SIZE 72
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using namespace std;
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// a GUID
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struct GUIDData {
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uint64_t data1;
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uint64_t data2;
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}; // struct GUIDData
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int GetNumber(int low, int high, int def, const char prompt[]);
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char GetYN(void);
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uint64_t GetSectorNum(uint64_t low, uint64_t high, uint64_t def, char prompt[]);
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char* BytesToSI(uint64_t size, char theValue[]);
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int GetBlockSize(int fd);
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char* GUIDToStr(struct GUIDData theGUID, char* theString);
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GUIDData GetGUID(void);
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int IsLittleEndian(void); // Returns 1 if CPU is little-endian, 0 if it's big-endian
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void ReverseBytes(void* theValue, int numBytes); // Reverses byte-order of theValue
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uint64_t PowerOf2(int value);
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int OpenForWrite(char* deviceFilename);
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uint64_t disksize(int fd, int* err);
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#endif
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