Function exec_fd_readdir

crates/test-programs/src/bin/p1_fd_readdir.rs:58–68

Return the entries plus a bool indicating EOF.

(fd: wasip1::Fd, cookie: wasip1::Dircookie)

/// Return the entries plus a bool indicating EOF.
unsafe fn exec_fd_readdir(fd: wasip1::Fd, cookie: wasip1::Dircookie) -> (Vec<DirEntry>, bool) {
    let mut buf: [u8; BUF_LEN] = [0; BUF_LEN];
    let bufused =
        wasip1::fd_readdir(fd, buf.as_mut_ptr(), BUF_LEN, cookie).expect("failed fd_readdir");
    assert!(bufused <= BUF_LEN);

    let sl = slice::from_raw_parts(buf.as_ptr(), bufused);
    let dirs: Vec<_> = ReadDir::from_slice(sl).collect();
    let eof = bufused < BUF_LEN;
    (dirs, eof)
}

unsafe fn assert_empty_dir(dir_fd: wasip1::Fd) {
    let stat = wasip1::fd_filestat_get(dir_fd).expect("failed filestat");