c-scape 0.22.3

A libc bottom-half implementation in Rust
Documentation 
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use rustix::fd::{BorrowedFd, IntoRawFd};
use rustix::pipe::PipeFlags;

use libc::{c_int, c_uint, size_t, ssize_t};

use crate::convert_res;

#[no_mangle]
unsafe extern "C" fn pipe(pipefd: *mut c_int) -> c_int {
    libc!(libc::pipe(pipefd));

    match convert_res(rustix::pipe::pipe()) {
        Some((a, b)) => {
            *pipefd = a.into_raw_fd();
            *pipefd.add(1) = b.into_raw_fd();
            0
        }
        None => -1,
    }
}

#[cfg(any(target_os = "android", target_os = "linux"))]
#[no_mangle]
unsafe extern "C" fn pipe2(pipefd: *mut c_int, flags: c_int) -> c_int {
    libc!(libc::pipe2(pipefd, flags));

    let flags = PipeFlags::from_bits(flags as _).unwrap();
    match convert_res(rustix::pipe::pipe_with(flags)) {
        Some((a, b)) => {
            *pipefd = a.into_raw_fd();
            *pipefd.add(1) = b.into_raw_fd();
            0
        }
        None => -1,
    }
}

#[no_mangle]
unsafe extern "C" fn tee(fd_in: c_int, fd_out: c_int, len: size_t, flags: c_uint) -> ssize_t {
    libc!(libc::tee(fd_in, fd_out, len, flags));

    let fd_in = BorrowedFd::borrow_raw(fd_in);
    let fd_out = BorrowedFd::borrow_raw(fd_out);
    let flags = rustix::pipe::SpliceFlags::from_bits_retain(flags);
    match convert_res(rustix::pipe::tee(fd_in, fd_out, len, flags)) {
        Some(num) => num as _,
        None => -1,
    }
}