Create a FIFO special file at the specified path with the specified mode.

Examples

# #![feature(unix_mkfifo)]
# #[cfg(not(unix))]
# fn main() {}
# #[cfg(unix)]
# fn main() -> std::io::Result<()> {
# use std::{
#     os::unix::fs::{mkfifo, PermissionsExt},
#     fs::{File, Permissions, remove_file},
#     io::{Write, Read},
# };
# let _ = remove_file("/tmp/fifo");
mkfifo("/tmp/fifo", Permissions::from_mode(0o774))?;

let mut wx = File::options().read(true).write(true).open("/tmp/fifo")?;
let mut rx = File::open("/tmp/fifo")?;

wx.write_all(b"hello, world!")?;
drop(wx);

let mut s = String::new();
rx.read_to_string(&mut s)?;

assert_eq!(s, "hello, world!");
# Ok(())
# }