Usage: ls_name_value_rd [-e] [-h] [-u] [-v] [-V] <filename> [<num_bytes>]

    -e | --empty    output <empty> if contents are empty; use twice to
                    additionally output <LF> instead of contents='\n'
    -h | --help     show this help message then exit
    -u | --utf8     if contents passes utf8 test, output it
    -v | --verbose  increase debug output
    -V | --version  show version string then exit
    <filename>      name of file to read
    <num_bytes>     maximum number of bytes to read [def: 80]

Read <num_bytes> from <filename> skipping any null characters. Any
bytes with the top bit set will cause <contains non-ASCII chars>
to be output to stdout. Empty files (and those with null chars
up to their EOF) output <empty>. Output to stdout does not
have a trailing \n .