2 # I, Ian Kelling, follow the GNU license recommendations at
3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
4 # recommend that small programs, < 300 lines, be licensed under the
5 # Apache License 2.0. This file contains or is part of one or more small
6 # programs. If a small program grows beyond 300 lines, I plan to change
7 # to a recommended GPL license.
9 # Copyright 2024 Ian Kelling
11 # Licensed under the Apache License, Version 2.0 (the "License");
12 # you may not use this file except in compliance with the License.
13 # You may obtain a copy of the License at
15 # http://www.apache.org/licenses/LICENSE-2.0
17 # Unless required by applicable law or agreed to in writing, software
18 # distributed under the License is distributed on an "AS IS" BASIS,
19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20 # See the License for the specific language governing permissions and
21 # limitations under the License.
24 # usage: wrt-reip PATTERN
25 # Removes pattern from dnsmasq leases file and restart dnsmasq.
26 # PATTERN should generally be an ip or a mac.
37 m
/etc
/init.d
/dnsmasq stop
39 tmp
=/tmp
/dhcp.leases.iank
40 sed "/$pattern/d" /tmp
/dhcp.leases
>$tmp
42 if (( $
(wc -l /tmp
/dhcp.leases |
awk '{print $1}') - 1 == $
(wc -l $tmp |
awk '{print $1}') )); then
43 echo "info: found one less line after removing $pattern. installing new leases file"
44 cp /tmp
/dhcp.leases
/tmp
/dhcp.leases.iank-backup
45 cat $tmp >/tmp
/dhcp.leases
50 error: unexpected line count in /tmp/dhcp.leases.iank"
51 try diffing /tmp/dhcp.leases{,.iank}
55 m
/etc
/init.d
/dnsmasq start