MAP_PRIVATE

MAP_PRIVATE is a memory mapping option used in operating systems like Linux to create a private copy of a file's contents in memory. When a program uses MAP_PRIVATE to map a file, it can read and modify the data without affecting the original file. Instead, changes are stored in a separate area, ensuring that the original file remains unchanged. This feature is useful for tasks like editing documents or processing data where temporary changes are needed. Overall, it allows for efficient memory usage while providing isolation from the original data.