postinst is in shared-mime-info 1.2-0ubuntu3.
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
if [ "$1" = "triggered" ]; then
if [ -x /usr/bin/update-mime-database.real ]; then
update-mime-database.real /usr/share/mime
fi
exit 0
fi
if [ -x /usr/bin/update-mime-database.real ]; then
update-mime-database.real /usr/share/mime
fi
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