#!/bin/sh

# rdiff-backup doesn't handle log.n -> log.n+1 renaming very well...
# this script does log rotation by using .YYYYMMDD instead.
#
# - dean gaudet <dean@arctic.org>

# Copyright (c) 2005 Dean Gaudet <dean@arctic.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.

# $Id: date-rotate,v 1.25 2005/04/27 01:18:17 dean Exp $

# the logs are listed up here... below you'll find the
# restart commands, and some log parsing commands.  search for "customize"
# and edit appropriately.

# WARNING: this script uses the append-only attribute, which can confuse
# tools which expect to be able to rename/truncate/etc. a log file (for
# example package management tools sometimes want to create/destroy logs).


#### customize here
logs="/var/log/messages /var/log/secure /var/log/maillog /var/log/cron"
logs="$logs /var/log/ipaccounting /var/log/ipacct /var/log/temperature"
logs="$logs /var/log/apache/access_log /var/log/apache/error_log"
logs="$logs /var/log/apache/access_log.not-configured"
logs="$logs /var/log/apache/access_log.catzooks"
logs="$logs /var/account/pacct"
logs="$logs /var/log/sheep/access_log /var/log/sheep/error_log /var/log/sheep/fsd/fsd_log"
logs="$logs /var/log/webmail/access_log /var/log/webmail/error_log"

keep=180
####

ext=`date +%Y%m%d`
ext_long=`date +%Y%m%d_%H%M%S`
result=0

safe_rename () {
	chattr -a "$1" && link -- "$1" "$2" && unlink -- "$1"
}

create_new () {
	touch -- "$1" \
		&& chown --reference="$2" -- "$1" \
		&& chmod --reference="$2" -- "$1" \
		&& chattr +a "$1"
}

unlink_old () {
	find "`dirname \"$1\"`" -regex "$1.[0-9_]+\(.gz\|.bz2\)?" -printf '%T@ %p\0' \
		| sort -z -k 1,1nr \
		| perl -n0e "++\$i; (\$f) = m#^\\d+ (.*)\$#; if (\$i > $keep) {unlink(\$f); }"
}

rotlogs=''
for log in $logs; do
	if safe_rename "$log" "$log.$ext"; then
		create_new "$log" "$log.$ext"
		unlink_old "$log"
		rotlogs="$rotlogs $log.$ext"
	elif safe_rename "$log" "$log.$ext_long"; then
		create_new "$log" "$log.$ext_long"
		unlink_old "$log"
		rotlogs="$rotlogs $log.$ext_long"
	else
		echo "error rotating $log" 1>&2
		result=1
	fi
done

#### customize here -- HUP/restart daemons whose logs are rotated
# restart lots of stuff
kill -HUP `cat /var/run/syslogd.pid`
sleep 1
kill -USR1 `cat /var/run/apache.pid` `cat /var/run/sheep.pid` `cat /var/run/webmail.pid`
sleep 2
/etc/init.d/acct stop
/etc/init.d/acct start
sleep 1
su sheep /home/sheep/docroot/v2.6/etc/rc.fsd reload
####

for log in $rotlogs; do
	#### customize here -- call any post-rotation log watching scripts
	case "`basename \"$log\"`" in
	messages.*|secure.*)
		/root/lib/messages.parse "$log"
		;;
	maillog.*)
		(cat /var/log/maillog.incomplete $log \
			| /root/lib/smtpd-sessions /var/log/maillog.incomplete.new /dev/null \
			&& mv /var/log/maillog.incomplete.new /var/log/maillog.incomplete) \
			2>&1 | mail -s "twinlark smtp report $ext" root
		;;
	esac
	####

	chmod -w -- "$log"
	gzip -9 -- "$log"
done

exit $result