Description: Fstatat is a function of the operating system that allows retrieving information about a file in relation to a directory file descriptor. This function is part of the application programming interface (API) of Unix-like systems, and it is used to obtain file metadata, such as size, permissions, type, and modification date, without needing to know the full path of the file. Fstatat is particularly useful in situations where working with file systems that may change dynamically, as it allows accessing file information more efficiently and securely. The function takes as parameters the file descriptor of the directory containing the target file and the name of the file, facilitating file management in environments where quick and direct access to file system information is required. This feature makes it a valuable tool for developers and system administrators who need to perform file operations programmatically and efficiently.