This file is indexed.

/usr/lib/lbdb/m_fido is in lbdb 0.38ubuntu1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#! /bin/sh
#
# -*-sh-*-
#
# $Id: m_fido.sh.in,v 1.8 2009-06-11 10:56:22 roland Exp $
#
#     Copyright (C) 1998-2005  Roland Rosenfeld <roland@spinnaker.de>
# 
#     This program is free software; you can redistribute it and/or modify
#     it under the terms of the GNU General Public License as published by
#     the Free Software Foundation; either version 2 of the License, or
#     (at your option) any later version.
# 
#     This program is distributed in the hope that it will be useful,
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#     GNU General Public License for more details.
# 
#     You should have received a copy of the GNU General Public License
#     along with this program; if not, write to the Free Software Foundation,
#     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,, USA.
#

m_fido_db=$HOME/.lbdb/nodelist

m_fido_query()
{
    test -f $m_fido_db || return
    grep -ia "$@." $m_fido_db || :
}