postinst is in gbrowse-data 2.56+dfsg-3build1.
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  | #!/bin/bash
set -e
case "$1" in
    configure)
        chown -R root:www-data /var/lib/gbrowse/databases
        chmod -R 770 /var/lib/gbrowse/databases
	if [ -e /etc/init.d/gbrowse-slave ] ; then
	  invoke-rc.d gbrowse-slave restart
	fi
    ;;
    abort-upgrade|abort-remove|abort-deconfigure)
    ;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
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