Function fd_readiness_notification

src/util/mod.rs:186–195

()

/// See https://skarnet.org/software/s6/notifywhenup.html
#[cfg(all(unix, feature = "cli"))]
pub fn fd_readiness_notification() {
    use std::os::unix::io::FromRawFd;
    use std::{env, fs::File, io::Write};
    if let Ok(fd_number) = env::var("NOTIFY_FD") {
        if let Ok(fd_number) = fd_number.parse::<u32>() {
            let mut f = unsafe { File::from_raw_fd(fd_number as i32) };
            write!(f, "\n").ok();
        }
    }
}
#[cfg(not(all(unix, feature = "cli")))]
pub fn fd_readiness_notification() {}