# arg 1: the new package version post_install() { if [ ! -r /dev/pilot ]; then cd /dev ln -sf ttyS0 pilot fi } # arg 1: the new package version # arg 2: the old package version post_upgrade() { /bin/true } # arg 1: the old package version pre_remove() { /bin/true } # arg 1: the old package version post_remove() { /bin/true } op=$1 shift $op $*