3988a733 |
1 | #!/bin/bash |
2 | set -e |
3 | |
4 | zone="$1" |
5 | subdomain="$2" |
6 | interval_min="$3" |
7 | interval_avg="$4" |
8 | interval_mem="$5" |
9 | |
10 | now=`date +%s` |
11 | charge=0 |
12 | |
13 | case $subdomain in |
14 | '@') files=_ ;; |
15 | *) files=$subdomain ;; |
16 | esac |
17 | |
18 | if test -f $files,timings && read lastup charge <$files,timings |
19 | then |
20 | if [ $now -lt $[ $lastup + $interval_min ] ]; then |
21 | echo "wait $[ $lastup + $interval_min - $now ]" |
22 | echo >&2 "must wait at least $interval_min between updates" |
23 | exit 75 |
24 | fi |
25 | charge=$[ $charge + $interval_avg - ($now - $lastup) ] |
26 | if [ $charge -gt $interval_mem ]; then |
27 | echo "wait $[ $charge - $interval_mem ]" |
28 | echo >&2 "must wait on average $interval_avg between updates" |
29 | exit 75 |
30 | fi |
31 | if [ $charge -lt 0 ]; then charge=0; fi |
32 | fi |
33 | |
34 | sort >$files,new |
35 | |
36 | if test -f $files,data |
37 | then |
38 | set +e |
39 | diff >/dev/null $files,data $files,new |
40 | diff=$? |
41 | set -e |
42 | |
43 | if [ $diff = 0 ]; then echo 'unchanged'; exit 0; fi |
44 | if [ $diff != 1 ]; then exit 1; fi |
45 | fi |
46 | |
47 | echo $now $charge >$files,timings.new |
48 | mv -f $files,timings.new $files,timings |
49 | mv $files,new $files,data |
50 | |
6362f12c |
51 | exec /usr/share/userv/dyndns/install $zone |