我正在编写一个用于备份某些指定文件的应用程序,因此使用备份 API 调用,即CreateFile BackupRead 和 WriteFile API。
获取错误访问冲突读取位置。
我在下面附上了代码。
#include <windows.h>
int main()
{
HANDLE hInput, hOutput;
//m_filename is a variable holding the file path to read from
hInput = CreateFile(L"C:\\Key.txt", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
//strLocation contains the path of the file I want to create.
hOutput= CreateFile(L"C:\\tmp\\", GENERIC_WRITE, NULL, NULL, CREATE_ALWAYS, NULL, NULL);
DWORD dwBytesToRead = 1024 * 1024 * 10;
BYTE *buffer;
buffer = new BYTE[dwBytesToRead];
BOOL bReadSuccess = false,bWriteSuccess = false;
DWORD dwBytesRead,dwBytesWritten;
LPVOID lpContext;
//Now comes the important bit:
do
{
bReadSuccess = BackupRead(hInput, buffer, sizeof(BYTE) *dwBytesToRead, &dwBytesRead, false, true, &lpContext);
bWriteSuccess= WriteFile(hOutput, buffer, sizeof(BYTE) *dwBytesRead, &dwBytesWritten, NULL);
}while(dwBytesRead == dwBytesToRead);
return 0;
}
有人建议我如何使用这些 API?
谢谢。