$ cat sysklogd 
#! /bin/sh

# sysklogd      Cron script to rotate system log files daily.
#
#               If you want to rotate other logfiles daily, edit
#               this script.  An easy way is to add files manually,
#               to add -a (for all log files) to syslogd-listfiles and
#               add some grep stuff, or use the -s pattern argument to
#               specify files that must not be listed.
#
#               This is a configration file.  You are invited to edit
#               it and maintain it on your own.  You'll have to do
#               that if you don't like the default policy
#               wrt. rotating logfiles (i.e. with large logfiles
#               weekly and daily rotation may interfere).  If you edit
#               this file and don't let dpkg upgrade it, you have full
#               control over it.  Please read the manpage to
#               syslogd-listfiles.
#
#               Written by Martin Schulze <joey@debian.org>.
#               $Id: cron.daily,v 1.12 2004/03/31 16:18:15 joey Exp $

test -x /usr/sbin/syslogd-listfiles || exit 0
test -x /sbin/syslogd || exit 0
test -f /usr/share/sysklogd/dummy || exit 0

set -e

cd /var/log
for LOG in `syslogd-listfiles`
do
   if [ -s $LOG ]; then
      savelog -g adm -m 640 -u root -c 7 $LOG >/dev/null
   fi
done

for LOG in `syslogd-listfiles --auth`
do
   if [ -f $LOG ]; then
      chown root:adm $LOG
      chmod o-rwx $LOG
   fi
done

# Restart syslogd
#
/etc/init.d/sysklogd reload-or-restart > /dev/null