This file is indexed.

/etc/freeradius/3.0/mods-available/sradutmp is in freeradius-config 3.0.16+dfsg-1ubuntu3.

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

The actual contents of the file can be viewed below.

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# -*- text -*-
#
#  $Id: 3a2a0e502e76ec00d4ec17e70132448e1547da46 $

# "Safe" radutmp - does not contain caller ID, so it can be
# world-readable, and radwho can work for normal users, without
# exposing any information that isn't already exposed by who(1).
#
# This is another 'instance' of the radutmp module, but it is given
# then name "sradutmp" to identify it later in the "accounting"
# section.
radutmp sradutmp {
	filename = ${logdir}/sradutmp
	permissions = 0644
	caller_id = "no"
}