postinst is in php5-gdcm 2.2.4-1.1ubuntu4.
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 | #!/bin/sh
set -e
[ "$1" = "configure" ] && php5enmod gdcm
exit 0
|