Function pipe2
fn pipe2(flags: OFlag) -> Result<(OwnedFd, OwnedFd)>Like pipe, but allows setting certain file descriptor flags.
The following flags are supported, and will be set atomically as the pipe is created:
O_CLOEXEC: Set the close-on-exec flag for the new file descriptors.O_DIRECT: Create a pipe that performs I/O in "packet" mode.O_NONBLOCK: Set the non-blocking flag for the ends of the pipe.
See also pipe(2)