prerm is in icewm 1.3.8+githubmod+20150914+fa3fdef-2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | #! /bin/sh -e
case "$0" in
    *experimental*)
    FLAVOR=-experimental
    ;;
    *lite*)
    FLAVOR=-lite
    ;;
    *)
    FLAVOR=""
    ;;
esac
case "${1}" in
   remove|upgrade|deconfigure)
      update-alternatives --remove x-window-manager /usr/bin/icewm$FLAVOR
      update-alternatives --remove x-session-manager /usr/bin/icewm-session$FLAVOR
      ;;
   failed-upgrade)
      ;;
   *)
      echo "prerm called with unknown argument \`${1}'" >&2
      exit 1
      ;;
esac
exit 0
 |