23 lines
770 B
Bash
23 lines
770 B
Bash
#!/bin/bash
|
|
|
|
# Copyright 2022 Google LLC
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
# https://stackoverflow.com/questions/50413579/bash-convert-netmask-in-cidr-notation
|
|
c=0 x=0$(printf '%o' ${1//./ })
|
|
while [ $x -gt 0 ]; do
|
|
let c+=$((x % 2)) 'x>>=1'
|
|
done
|
|
echo $c
|