//! Umask support.
use cratebackend;
use crateMode;
/// `umask(mask)`—Set the process file creation mask.
///
/// # References
/// - [POSIX]
/// - [Linux]
///
/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9799919799/functions/umask.html
/// [Linux]: https://man7.org/linux/man-pages/man2/umask.2.html