This file is indexed.

/usr/share/postgresql/9.3/extension/lo--1.0.sql is in postgresql-contrib-9.3 9.3.4-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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/* contrib/lo/lo--1.0.sql */

-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION lo" to load this file. \quit

--
--	Create the data type ... now just a domain over OID
--

CREATE DOMAIN lo AS pg_catalog.oid;

--
-- For backwards compatibility, define a function named lo_oid.
--
-- The other functions that formerly existed are not needed because
-- the implicit casts between a domain and its underlying type handle them.
--
CREATE FUNCTION lo_oid(lo) RETURNS pg_catalog.oid AS
'SELECT $1::pg_catalog.oid' LANGUAGE SQL STRICT IMMUTABLE;

-- This is used in triggers
CREATE FUNCTION lo_manage()
RETURNS pg_catalog.trigger
AS 'MODULE_PATHNAME'
LANGUAGE C;