freebsd-ports/japanese/ebnetd/pkg-install

#!/bin/sh -
# an installation script for ndtpd

ask() {
    local question default answer

    question=$1
    default=$2

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

yesno() {
    local question default

    question=$1
    default=$2

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

[ "$2" = POST-INSTALL ] || exit 0

#
# Add an entry for `ndtp' to /etc/services.
#
file=/etc/services
back=${file}.bak
name=ndtp
port=2010/tcp
comment="Network Dictionary Transfer Protocol"

echo "************************************************************************"
if sed 's/#.*//' ${file} | grep -qw ${name}; then
    echo "This system has already an entry for ${name} in ${file}."
else
    echo "This system has no entry for ${name} in ${file}."
    if yesno "  Would you like to add it automatically?" y; then
	cp -f ${file} ${back}
	echo "    The original file is saved as ${back}."

	if sed 's/#.*//' ${file} | grep -qw ${port}; then
	    sed 's,^\([^#]*[ 	]'${port}'\),\1	'${name}, ${back} > ${file}
	else
	    echo "${name}		${port}   #${comment}" >> ${file}
	fi
    fi
fi
echo "************************************************************************"

exit 0