驱动中读写文件

// 打开指定文件HANDLE CKOpenFile( PUNICODE_STRING punFileName ){HANDLE file_handle = NULL;NTSTATUS status;OBJECT_ATTRIBUTES object_attributes;IO_STATUS_BLOCK io_status = { 0 };InitializeObjectAttributes(&object_attributes,punFileName, OBJ_CASE_INSENSITIVE|OBJ_KERNEL_HANDLE, NULL, NULL);status = ZwCreateFile( &file_handle, GENERIC_READ | GENERIC_WRITE, &object_attributes, &io_status, NULL, FILE_ATTRIBUTE_NORMAL, FILE_SHARE_READ, FILE_OPEN_IF, FILE_NON_DIRECTORY_FILE | FILE_RANDOM_ACCESS | FILE_SYNCHRONOUS_IO_NONALERT, NULL, 0);if( !NT_SUCCESS( status ) ){KdPrint(( "Open file failed! /n" ));return NULL;}return file_handle;}BOOLEAN TestWriteFile(){NTSTATUS status;LARGE_INTEGER offset = { 0 };IO_STATUS_BLOCK io_status = { 0 };UNICODE_STRING unFileName = RTL_CONSTANT_STRING( L"//??//C://Test.txt" );CHAR szBuff[] = { "Write this string to file!" };HANDLE file_handle = CKOpenFile( &unFileName );// 打开文件if( file_handle == NULL )return FALSE;status = ZwWriteFile( file_handle, NULL, NULL, NULL, &io_status, szBuff, strlen(szBuff), &offset, NULL);if( !NT_SUCCESS(status) )KdPrint(( "Write file failed!/n" ) );elseoffset.QuadPart += strlen(szBuff);ZwClose(file_handle);// 关闭文件return TRUE;}