freebsd-ports/irc/ircd-hybrid/pkg-install

#!/bin/sh

if [ "x$2" != "xPRE-INSTALL" ]; then
	exit 0;
fi

ask() {
	local question default answer

	question=$1
	default=$2
	if [ -z "${PACKAGE_BUILDING}" ]; then
		read -p "${question} [${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
}

if which -s pw ; then
	:
else
	cat <<EOF

This system looks like a pre-2.2 version of FreeBSD.  I see that it
is missing the "pw" utility.  I need this utility.  Please get them
and install them, and try again.  You can get the sources from:

  ftp://ftp.freebsd.org/pub/FreeBSD/FreeBSD-current/src/usr.sbin/pw.tar.gz

EOF

	exit 1
fi

echo ""
if grep -q "^ircd:" /etc/group; then
	echo "You already have a group \"ircd\", so I will use it."
else
	echo "You need a group \"ircd\"."
	if which -s pw && yesno "Would you like me to create it" y; then
		pw groupadd ircd -g 72 || exit
		echo "Done."
	else
		echo "Please create it, and try again."
		if ! grep -q "^ircd:" /etc/passwd; then
			echo "While you're at it, please create a user \"${user}\" too,"
			echo "with a default group of \"${group}\"."
		fi
		exit 1
	fi
fi

if grep -q "^ircd:" /etc/passwd; then
	echo "You already have a user \"ircd\", so I will use it."
else
	echo "You need a user \"ircd\"."
	if which -s pw && yesno "Would you like me to create it" y; then
		pw useradd ircd -g ircd -u 72 -h - -d /nonexistent \
			-s /nonexistent -c "IRC Daemon" || exit
		echo "Done."
	else
		echo "Please create it, and try again."
		exit 1
	fi
fi