press key to continue

m3.sh

function PressKeyToContinue() {

    printf "\n";

    question="Pressione S para continuar ou qualquer outra tecla para pular essa parte execução do script";
	expected_key_pressed='s';
	abort_script=false;

	if [ ! -z "$1" ]; then
        question="${1}";
    fi

	if [ ! -z "$2" ]; then
        expected_key_pressed="${2}";
    fi

	if [[ ! -z "$3" && "${3,,}" == "abort" ]]; then
		# in case of a negative response, the script will abort the process
        abort_script=true;
    fi

    read -n1 -r -p "${question}: " key

	# "parameter expansion" transforming key to lowercase
    # @info $key is empty when ENTER/SPACE is pressed
    if [[ "${key,,}" = "${expected_key_pressed,,}" ]]; then
        echo 1;
    else
		if [ $abort_script == true ]; then
			exit 1;
		fi

		# by default continue to the next step
		echo 0;
    fi
}

function B() { printf "\nfuncao b"; }

function A() {

	local response=

	if [[ $(PressKeyToContinue "chamar b? [s ou n]:" "s") -eq 1 ]]; then
	 	B;
		printf "\ncontinuou\n";
	else
		printf "\nnao continuou\n";
	fi;
}

function C() { printf "\nfuncao c"; }


A;
C;

printf "\n";