#!/bin/sh
#
# rotatelogs - rotate log files (local host)
#

BACKUP_LOGDIR="/var/log/backup"

LOGDIR_GLOBAL=/var/log
LOGFILES_GLOBAL="auth.log clamd.log freshclam.log cron.log daemon.log kern.log mail.log procmail.log scrollkeeper.log sys.log user.log xdm.log Xorg.0.log"

LOGDIR_APACHE=/var/log/apache
LOGFILES_APACHE="access_log error_log ssl_request_log"

LOGDIR_CUPS=/var/log/cups
LOGFILES_CUPS="access_log error_log"

LOGDIR_NAMED=/srv/named/etc/namedb
LOGFILES_NAMED="named.run"

# arg 1: Backup log directory
# arg 2: log filename
rotate_log()
{
    backup_log_dir=${1}
    file=${2}

    for day in 8 7 6 5 4 3 2 1 0 ; do
	if [ -f ${backup_log_dir}/${file}.${day} ]; then
	    mv ${backup_log_dir}/${file}.${day} ${backup_log_dir}/${file}.$((${day}+1)) || exit 1
	fi
    done

    if [ -f ${file} ]; then
	user=$(ls -l --numeric-uid-gid ${file} | awk '{ print $3 }')
	group=$(ls -l --numeric-uid-gid ${file} | awk '{ print $4 }')
	cp -a ${file} ${backup_log_dir}/${file}.0 || exit 1
    fi

    # Empty file
    cp /dev/null ${file} &&
    chown ${user}.${group} ${file} &&
    chmod 640 ${file}

    return $?
}

if [ ! -d ${BACKUP_LOGDIR} ]; then
    mkdir ${BACKUP_LOGDIR}
fi

# syslogd files
LOGDIR=${LOGDIR_GLOBAL}
cd ${LOGDIR} &&
for file in ${LOGFILES_GLOBAL}; do
    rotate_log ${BACKUP_LOGDIR} ${file} || exit 1
done

kill -HUP `cat /var/run/syslogd.pid`  &&

# named (BIND) server log files (if installed)
LOGDIR=${LOGDIR_NAMED}
if [ -d ${LOGDIR} ]; then
    cd ${LOGDIR} &&
    for file in ${LOGFILES_NAMED}; do
        rotate_log ${BACKUP_LOGDIR} ${file} || exit 1
    done

    kill -HUP `cat /srv/named/var/run/named.pid` || exit 1
fi

# For Apache web server (if installed)
LOGDIR=${LOGDIR_APACHE}
if [ -d ${LOGDIR} ]; then
    if [ ! -d ${BACKUP_LOGDIR}/apache ]; then
        mkdir -p ${BACKUP_LOGDIR}/apache
    fi
    cd ${LOGDIR} &&
    for file in ${LOGFILES_APACHE}; do
        rotate_log ${BACKUP_LOGDIR}/apache ${file} || exit 1
    done

    /usr/sbin/apachectl graceful &&
    sleep 2
fi

# For CUPS
LOGDIR=${LOGDIR_CUPS}
if [ -d ${LOGDIR} ]; then
    if [ ! -d ${BACKUP_LOGDIR}/cups ]; then
        mkdir -p ${BACKUP_LOGDIR}/cups
    fi
    cd ${LOGDIR} &&
    for file in ${LOGFILES_CUPS}; do
        rotate_log ${BACKUP_LOGDIR}/cups ${file} || exit 1
    done
fi

exit $?