Function twz_rt_fd_pwrite_to

pub fn twz_rt_fd_pwrite_to(
    fd: RawFd,
    buf: &[u8],
    ctx: &mut IoCtx,
    ep: Endpoint,
) -> Result<usize>

Write bytes from a buffer into a file descriptor, up to buf.len() bytes. On success, returns the number of bytes actually written, which may be fewer than requested.