postinst is in xserver-xorg-input-vmmouse 1:13.1.0-1ubuntu2.
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 | #!/bin/sh
set -e
case "$1" in
configure)
if dpkg --compare-versions "$2" lt 1:12.6.5-4; then
udevadm trigger --subsystem-match=input --action=change || true
fi
esac
exit 0
|