#compdef md5sum

autoload -U is-at-least

_md5sum() {
    typeset -A opt_args
    typeset -a _arguments_options
    local ret=1

    if is-at-least 5.2; then
        _arguments_options=(-s -S -C)
    else
        _arguments_options=(-s -C)
    fi

    local context curcontext="$curcontext" state line
    _arguments "${_arguments_options[@]}" \
'-c[read checksums from the FILEs and check them]' \
'--check[read checksums from the FILEs and check them]' \
'-h[Print help]' \
'--help[Print help]' \
'-V[Print version]' \
'--version[Print version]' \
'*::file:' \
&& ret=0
}

(( $+functions[_md5sum_commands] )) ||
_md5sum_commands() {
    local commands; commands=()
    _describe -t commands 'md5sum commands' commands "$@"
}

_md5sum "$@"