preinst is in mythbuntu-diskless-client 0.9-0ubuntu2.
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 32 33 34 | #!/bin/sh -e
. /usr/share/debconf/confmodule
case "$1" in
install|upgrade)
# taken from LTSP package
if [ ! -f /etc/ltsp_chroot ]; then
db_fset mythbuntu-diskless-client/abort-installation seen false
db_input critical mythbuntu-diskless-client/abort-installation || true
db_go || true
exit 1
fi
dpkg-divert --package mythbuntu-diskless-client --rename --add /usr/bin/update-notifier || true
dpkg-divert --package mythbuntu-diskless-client --rename --add /usr/bin/nm-applet || true
;;
abort-upgrade|abort-remove|abort-deconfigure)
;;
*)
echo "postinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
exit 0
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