prerm is in ksh 93u+20120801-2.
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 | #!/bin/sh
set -e
case "$1" in
remove|deconfigure)
update-alternatives --remove ksh /bin/ksh93
update-binfmts --package ksh --remove ksh /bin/ksh93
;;
upgrade|failed-upgrade)
;;
*)
echo "prerm called with unknown argument \`$1'" >&2
exit 0
;;
esac
exit 0
|