This file is indexed.

/usr/bin/backup-driver is in chiark-backup 4.4.2.

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
# driver
# entry point for inittab (or perhaps cron) to run the backups.
#
# This file is part of chiark backup, a system for backing up GNU/Linux and
# other UN*X-compatible machines, as used on chiark.greenend.org.uk.
#
# chiark backup is:
#  Copyright (C) 1997-1998,2000-2001,2007
#                     Ian Jackson <ian@chiark.greenend.org.uk>
#  Copyright (C) 1999 Peter Maydell <pmaydell@chiark.greenend.org.uk>
#
# This 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 3, or (at your option) any later version.
#
# This 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, consult the Free Software Foundation's
# website at www.fsf.org, or the GNU Project website at www.gnu.org.

cd /var/lib/chiark-backup
PATH=/usr/share/chiark-backup:$PATH export PATH

if [ "x$1" != test ]; then
	stty sane
	stty -isig
fi

rm -f this-status p p2
echo 'FAILED to start dump script' >this-status

# Here we go : run 'full', which (name notwithstanding) handles
# both full and incremental backups, according to the ID of the
# tape in the drive.
(full; snap-drop) 2>&1 | tee this-log

status=`cat this-status 2>/dev/null`

# Mail a report to somewhere appropriate; -odq removed (means just 
# queue message, don't try to deliver) because it just delays the
# message (you might want that if mail was one of the services turned
# off for the duration of the backup, though).
cat <<END - this-log | /usr/lib/sendmail -oi -om -oee -t
To: dump-reports
Subject: Dump Report: $status

END

rm -f /TAPEID

if [ "x$1" != test ]; then
        # Bring the system up as multiuser again
	bringup
	stty isig
fi