PREUN

/bin/sh

[ $1 = 0 ] || exit 0
/usr/sbin/alternatives --remove links /usr/bin/links2

POSTIN

/bin/sh

/usr/sbin/alternatives \
        --install /usr/bin/links links /usr/bin/links2 80 \
        --slave /usr/share/man/man1/links.1.gz links-man /usr/share/man/man1/links2.1.gz
[ $(readlink /etc/alternatives/links) = /usr/bin/links2 ] &&
        /usr/sbin/alternatives --set links /usr/bin/links2
exit 0

POSTUN

/bin/sh

[ $1 = 0 ] && exit 0
[ $(readlink /etc/alternatives/links) = /usr/bin/links2 ] &&
        /usr/sbin/alternatives --set links /usr/bin/links2
exit 0