postinst is in libsane-extras 1.0.22.3ubuntu1.
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 | #!/bin/sh
set -e
case "$1" in
configure)
if [ "$(uname -s)" = "Linux" ]; then
if [ -e /etc/hotplug/usb/libsane-extras.usermap ]; then
rm -f /etc/hotplug/usb/libsane-extras.usermap
fi
if [ -e /etc/sane.d/hotplug/libsane-extras.db ]; then
rm -f /etc/sane.d/hotplug/libsane-extras.db
rmdir -p --ignore-fail-on-non-empty /etc/sane.d/hotplug
fi
fi
;;
abort-upgrade|abort-remove|abort-deconfigure)
;;
*)
echo "$0 called with unknown argument '$1'" >&2
exit 1
;;
esac
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