Own shell example

shell

shell() {
    TOPCMD=$@ bash -c 'while read -p "${TOPCMD##*/}> " -ra sub; do
        case ${sub[0]:-} in
        "") continue;;
        exit) exit;;
        escape) (set -x; ${sub[@]:1});;
        *) (set -x; ${TOPCMD} ${sub[@]});;
        esac
        done'
}

use_prefix_2

use_prefix () {
    while read -p "$* >" -ra c; do
        [ "${c[0]}" = "exit" ] && break
        "$@" "${c[@]}"
    done
}

# not working in MacOS
# All example from https://unix.stackexchange.com/questions/555622/prefix-all-commands-in-shell

user_prefix

use_prefix () {
    while read -r c; do
        "$@" "${c[@]}"
    done
}