[userv-utils] / dyndns / update

#!/bin/bash

# Copyright (C) 1999-2000,2003 Ian Jackson
#
# This file is part dyndns, part of userv-utils
#
# 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 userv-utils; if not, write to the Free Software
# Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# $Id$

set -e

zone="$1"
subdomain="$2"
interval_min="$3"
interval_avg="$4"
interval_mem="$5"

now=`date +%s`
charge=0

case $subdomain in
'@')	files=_			;;
*)	files=$subdomain	;;
esac

if test -f $files,timings && read lastup charge <$files,timings
then
	if [ $now -lt $[ $lastup + $interval_min ] ]; then
		echo "wait $[ $lastup + $interval_min - $now ]"
		echo >&2 "must wait at least $interval_min between updates"
		exit 75
	fi
	charge=$[ $charge + $interval_avg - ($now - $lastup) ]
	if [ $charge -gt $interval_mem ]; then
		echo "wait $[ $charge - $interval_mem ]"
		echo >&2 "must wait on average $interval_avg between updates"
		exit 75
	fi
	if [ $charge -lt 0 ]; then charge=0; fi
fi

sort >$files,new

if test -f $files,data
then
	set +e
	diff >/dev/null $files,data $files,new
	diff=$?
	set -e

	if [ $diff = 0 ]; then echo 'unchanged'; exit 0; fi
	if [ $diff != 1 ]; then exit 1; fi
fi

echo $now $charge >$files,timings.new
mv -f $files,timings.new $files,timings
mv $files,new $files,data

exec /usr/share/userv/dyndns/install $zone
Commit	Line	Data
3988a733	1	#!/bin/bash
711a0748	2
	3	# Copyright (C) 1999-2000,2003 Ian Jackson
	4	#
	5	# This file is part dyndns, part of userv-utils
	6	#
	7	# This is free software; you can redistribute it and/or modify it
	8	# under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 2 of the License, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful, but
	13	# WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	# General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with userv-utils; if not, write to the Free Software
	19	# Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	20	#
	21	# $Id$
	22
3988a733	23	set -e
	24
	25	zone="$1"
	26	subdomain="$2"
	27	interval_min="$3"
	28	interval_avg="$4"
	29	interval_mem="$5"
	30
	31	now=`date +%s`
	32	charge=0
	33
	34	case $subdomain in
	35	'@') files=_ ;;
	36	*) files=$subdomain ;;
	37	esac
	38
	39	if test -f $files,timings && read lastup charge <$files,timings
	40	then
	41	if [ $now -lt $[ $lastup + $interval_min ] ]; then
	42	echo "wait $[ $lastup + $interval_min - $now ]"
	43	echo >&2 "must wait at least $interval_min between updates"
	44	exit 75
	45	fi
	46	charge=$[ $charge + $interval_avg - ($now - $lastup) ]
	47	if [ $charge -gt $interval_mem ]; then
	48	echo "wait $[ $charge - $interval_mem ]"
	49	echo >&2 "must wait on average $interval_avg between updates"
	50	exit 75
	51	fi
	52	if [ $charge -lt 0 ]; then charge=0; fi
	53	fi
	54
	55	sort >$files,new
	56
	57	if test -f $files,data
	58	then
	59	set +e
	60	diff >/dev/null $files,data $files,new
	61	diff=$?
	62	set -e
	63
	64	if [ $diff = 0 ]; then echo 'unchanged'; exit 0; fi
	65	if [ $diff != 1 ]; then exit 1; fi
	66	fi
	67
	68	echo $now $charge >$files,timings.new
	69	mv -f $files,timings.new $files,timings
	70	mv $files,new $files,data
	71
6362f12c	72	exec /usr/share/userv/dyndns/install $zone