pub const PIPE_BUF: usize = imp::io::PIPE_BUF;
The portability is definied by: #[cfg(any(linux_raw,
all(libc,
not(any(windows, target_os = "illumos", target_os = "redox", target_os =
"wasi")))))]
Documentation
PIPE_BUF—The maximum length at which writes to a pipe are atomic.
References