Checking how sudo works

check_sudo.sh

#!//usr/bin/env bash
set -e

function iColor() {
    echo -n "'$(tput setaf $1)"; shift; echo -n "${@}$(tput sgr0)'"
}

function print_info() {
    function iColor() {
        printf "'$(tput setaf $1)"; shift; printf "${@}$(tput sgr0)'"
    }
	    
    GID=$(id -g)
    echo -e "  I'am user `iColor 2 ${USER}` with id: $(iColor 2 ${UID}), gid:`iColor 2 ${GID}` , and effective id `iColor 2 ${EUID}`"
    echo -e "  My home directory is: `iColor 2 ${HOME}` "
    
    if [ "${SUDO_USER}" != "" ]
    then
        echo -e "    Running command under `iColor 1 sudo` enviroment"
        echo -e "    The sudo said that user is `iColor 2 ${SUDO_USER}`, with id: `iColor 2 ${SUDO_UID}` and gid: `iColor 2 ${SUDO_GID}`"
    fi 	
    echo
}


FUNC=`declare -f print_info`
echo "Running command `iColor 3 bash -c`"
bash -c "${FUNC};print_info"

echo "Running command `iColor 3 sudo bash -c`"
sudo bash -c "${FUNC};print_info"

echo "Running command `iColor 3 sudo -H bash -c`"
sudo -H bash -c "${FUNC};print_info"

echo "Running command `iColor 3 sudo -HP bash -c`"
sudo -H -P bash -c "${FUNC};print_info"

# And finally sudo. Don't do this
echo "Password again please ... (Don't use su)"
echo "Running command `iColor 3 su -c`"
su -c "${FUNC};print_info"