/usr/share/postgresql/9.5/extension/orafce.control is in postgresql-9.5-orafce 3.2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | # intarray extension
comment = 'Functions and operators that emulate a subset of functions and packages from the Oracle RDBMS'
default_version = '3.2'
module_pathname = '$libdir/orafce'
relocatable = false
|