1 // 2 // C++ Interface: diskio (platform-independent components) 3 // 4 // Description: Class to handle low-level disk I/O for GPT fdisk 5 // 6 // 7 // Author: Rod Smith <rodsmith@rodsbooks.com>, (C) 2009 8 // 9 // Copyright: See COPYING file that comes with this distribution 10 // 11 // 12 // This program is copyright (c) 2009 by Roderick W. Smith. It is distributed 13 // under the terms of the GNU GPL version 2, as detailed in the COPYING file. 14 15 #define __STDC_LIMIT_MACROS 16 #ifndef __STDC_CONSTANT_MACROS 17 #define __STDC_CONSTANT_MACROS 18 #endif 19 20 #ifdef _WIN32 21 #include <windows.h> 22 #include <winioctl.h> 23 #define fstat64 fstat 24 #define stat64 stat 25 #define S_IRGRP 0 26 #define S_IROTH 0 27 #else 28 #include <sys/ioctl.h> 29 #endif 30 #include <string> 31 #include <stdint.h> 32 #include <errno.h> 33 #include <fcntl.h> 34 #include <sys/stat.h> 35 #include <iostream> 36 37 #include "support.h" 38 #include "diskio.h" 39 //#include "gpt.h" 40 41 using namespace std; 42 DiskIO(void)43DiskIO::DiskIO(void) { 44 userFilename = ""; 45 realFilename = ""; 46 modelName = ""; 47 isOpen = 0; 48 openForWrite = 0; 49 } // constructor 50 ~DiskIO(void)51DiskIO::~DiskIO(void) { 52 Close(); 53 } // destructor 54 55 // Open a disk device for reading. Returns 1 on success, 0 on failure. OpenForRead(const string & filename)56int DiskIO::OpenForRead(const string & filename) { 57 int shouldOpen = 1; 58 59 if (isOpen) { // file is already open 60 if (((realFilename != filename) && (userFilename != filename)) || (openForWrite)) { 61 Close(); 62 } else { 63 shouldOpen = 0; 64 } // if/else 65 } // if 66 67 if (shouldOpen) { 68 userFilename = filename; 69 MakeRealName(); 70 OpenForRead(); 71 } // if 72 73 return isOpen; 74 } // DiskIO::OpenForRead(string filename) 75 76 // Open a disk for reading and writing by filename. 77 // Returns 1 on success, 0 on failure. OpenForWrite(const string & filename)78int DiskIO::OpenForWrite(const string & filename) { 79 int retval = 0; 80 81 if ((isOpen) && (openForWrite) && ((filename == realFilename) || (filename == userFilename))) { 82 retval = 1; 83 } else { 84 userFilename = filename; 85 MakeRealName(); 86 retval = OpenForWrite(); 87 if (retval == 0) { 88 realFilename = userFilename = ""; 89 } // if 90 } // if/else 91 return retval; 92 } // DiskIO::OpenForWrite(string filename) 93