This file is indexed.

/etc/cron.daily/cyrus-imapd is in cyrus-common 2.5.10-3ubuntu1.

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
# Cyrus IMAPd daily maintenance script
# Copyright (c) 2002,2003 by Henrique M. Holschuh
# Distributed under the terms of the GNU General Public License version 2
#
# This script:
#   1. Backups the mailbox database to the portable text format,
#      and compresses the result.  This backup can be used to restore
#      the Cyrus mailbox database using ctl_mboxlist (after uncompressing
#      the backup file).
#
#   2. Cleans up any leftover crap in .stage directories.
#
#   3. Runs chk_cyrus and outputs warning messages (so that cron
#      sends them to the administrator) if any problems are detected.

set -e

# Make sure we get sane behaviour in broken locales
LC_ALL=C
export LC_ALL

bak=/var/backups
bakfile=${bak}/cyrus-mboxlist.txt.gz
CONF=/etc/imapd.conf
CHKCYRUS=0
[ -r /etc/default/cyrus-imapd ] && . /etc/default/cyrus-imapd
umask 022

# check whether ctl_mboxlist  and cyrus-hardwired-config.txt exist
# exit cleanly if they don't
[ -x /usr/lib/cyrus/bin/ctl_mboxlist ] \
&& [ -f /usr/lib/cyrus/cyrus-hardwired-config.txt ] \
|| exit 0
# Check if Cyrus is installed (vs. removed but not purged)
grep -qE '^PACKAGE_VERSION[[:blank:]]+2[.][24]' \
	/usr/lib/cyrus/cyrus-hardwired-config.txt >/dev/null 2>&1 || exit 0

# 1. backup mailbox database
[ -d $bak ] || ( mkdir -p $bak ; chmod 600 $bak )
[ -f $bakfile ] && mv ${bakfile} ${bakfile}.bak
#	su "--command=/usr/sbin/ctl_mboxlist -d" - cyrus | ...
start-stop-daemon --start --exec /usr/lib/cyrus/bin/ctl_mboxlist --quiet --chuid cyrus -- -d | gzip -9 >${bakfile}

# 2. clean up all leftover .stage directories in all spools listed in
#    the default config file
[ $CHKCYRUS -ne 0 ] && {
    [ -r "$CONF" ] || {
	echo $0: unable to read configuration file $CONF. Aborting...
	exit 1
    }
    partitions=$(sed --silent -e "/^[[:blank:]]*partition-[[:alnum:]]\+:/ { \
            s#^[[:blank:]]*partition-[[:alnum:]]\+:[[:blank:]]*## \
	    p
	    } " < "$CONF" | sort | uniq | xargs)
    for i in $partitions ; do
	find "$i" -name '.stage' -type d -print0 | \
	  xargs --null -n 1 -r -i'{1}' \
	    find {1} -type f -ctime +1 -exec rm -f {} \;
    done
}

# 3. runs chk_cyrus
[ -x /usr/lib/cyrus/bin/chk_cyrus ] && {
	tmpfile=$(mktemp -t cyrus-daily-cronjob.XXXXXXXXXX)
	trap 'rm -f "${tmpfile}"' 0
#	su "--command=/usr/sbin/chk_cyrus" - cyrus | ...
	start-stop-daemon --start --exec /usr/lib/cyrus/bin/chk_cyrus --quiet --chuid cyrus >"${tmpfile}" 2>&1 || cat "${tmpfile}" 1>&2
	rm -f "${tmpfile}"
	trap '' 0
}

exit 0