PREUN

/bin/sh

if [ "$1" = "0" ]; then
	grep -v /bin/rssh /etc/shells | grep -v /bin/scpsh | grep -v /bin/sftpsh > /etc/shells.new
	mv -f /etc/shells.new /etc/shells
fi

POSTIN

/bin/sh

if [ ! -f /etc/shells ]; then
	echo "/bin/rssh" > /etc/shells
	echo "/bin/scpsh" >> /etc/shells
	echo "/bin/sftpsh" >> /etc/shells
else
	if ! grep -q '^/bin/rssh$' /etc/shells; then
		echo "/bin/rssh" >> /etc/shells
	fi
	if ! grep -q '^/bin/scpsh$' /etc/shells; then
		echo "/bin/scpsh" >> /etc/shells
	fi
	if ! grep -q '^/bin/sftpsh$' /etc/shells; then
		echo "/bin/sftpsh" >> /etc/shells
	fi
fi