deb-prerm - package pre-removal maintainer script

Description

A package can perform several pre-removal actions via maintainer scripts, by including an executable prerm file in its control archive (i.e. DEBIAN/prerm during package creation). The script can be called in the following ways: prermremove Before the package is removed. old-prermupgradenew-version Before an upgrade. new-prermfailed-upgradeold-versionnew-version If the above upgrade fails. The new-version is passed only since dpkg 1.18.5. prermdeconfigurein-favournew-packagenew-version [ removingold-packageold-version ] Before package is deconfigured while dependency is replaced due to conflict. prermremovein-favournew-packagenew-version Before the package is replaced due to conflict.