infodir=usr/share/info file=gperf.info.gz post_install() { [ -x usr/bin/install-info ] || return 0 install-info $infodir/$file $infodir/dir 2> /dev/null } post_upgrade() { post_install $1 } pre_remove() { [ -x usr/bin/install-info ] || return 0 install-info --delete $infodir/$file $infodir/dir 2> /dev/null }