POSTIN

/bin/sh

update-alternatives --install /usr/bin/emacs emacs /usr/bin/emacs-20.7 20
if [ -x /usr/bin/update-menus ]; then /usr/bin/update-menus; fi

POSTUN

/bin/sh

if [ "$1" = 0 ]; then
    if [ -x /usr/bin/update-menus ]; then /usr/bin/update-menus; fi
    update-alternatives --remove emacs /usr/bin/emacs-20.7
fi