#!/bin/sh
# an installation script for spamd copied from pf_freebsd

ask() {
    local question default answer

    question=$1
    default=$2
    if [ -z "${PACKAGE_BUILDING}" ]; then
	read -p "${question} (y/n) [${default}]? " answer
    fi
    if [ x${answer} = x ]; then
	answer=${default}
    fi
    echo ${answer}
}

yesno() {
    local dflt question answer

    question=$1
    dflt=$2
    while :; do
	answer=$(ask "${question}" "${dflt}")
	case "${answer}" in
	[Yy]*)		return 0;;
	[Nn]*)		return 1;;
	esac
	echo "Please answer yes or no."
    done
}

check_service() {
    local name number type comment
    
    name=$1
    number=$2
    type=$3
    comment=$4
    
    FILE="/etc/services"
    # check
    OK=no
    HAS_SERVICE=no
    COUNT=1
    for i in `grep $name $FILE `; do
	if [ $COUNT = 1 ] && [ X"$i" = X"$name" ]; then
	    HAS_SERVICE=yes
	elif [ $COUNT = 2 ] && [ $HAS_SERVICE = yes ] && \
		[ X"$i" = X"$number/$type" ]; then
	    OK=yes
	    break
	fi
	COUNT=`expr ${COUNT} + 1`
    done
    # add an entry for SERVICE to /etc/services
    if [ $OK = no ]; then
	echo "This system has no entry for $name in ${FILE}"
	if yesno "Would you like to add it automatically?" y; then
	    mv ${FILE} ${FILE}.bak
	    (grep -v $name ${FILE}.bak ; \
		echo "$name	$number/$type	# $comment") \
		>> ${FILE}
	    rm ${FILE}.bak
	else
	    echo "Please add '$name $number/$type' into ${FILE}, and try again."
	    return 1
	fi
    fi
    return 0
}

case $2 in
PRE-INSTALL)

    if ! check_service spamd 8025 tcp "# spamd(8)"; then
	exit 1
    fi
    if ! check_service spamd-cfg 8026 tcp "# spamd(8) configuration"; then
	exit 1
    fi
    ;;

esac