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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 |