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Added function cidr2mask in .zshrc

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This commit is contained in:
Marcin Woźniak 2024-01-22 00:19:34 +01:00
parent 0de572feaf
commit b8aef151f2
Signed by: y0rune
GPG Key ID: F204C385F57EB348
1 changed files with 19 additions and 0 deletions
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.zshrc
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@ -34,6 +34,25 @@ mask2cidr() {
echo $(($number_of_bits_stripped + $number_of_bits_from_conversion_table)) echo $(($number_of_bits_stripped + $number_of_bits_from_conversion_table))
} }
cidr2mask() {
local i mask=""
local full_octets=$(($1 / 8))
local partial_octet=$(($1 % 8))
for ((i = 0; i < 4; i += 1)); do
if [ $i -lt $full_octets ]; then
mask+=255
elif [ $i -eq $full_octets ]; then
mask+=$((256 - 2 ** (8 - $partial_octet)))
else
mask+=0
fi
test $i -lt 3 && mask+=.
done
echo $mask
}
[ -f /etc/gentoo-release ] && export ZSH="/usr/share/zsh/site-contrib/oh-my-zsh" [ -f /etc/gentoo-release ] && export ZSH="/usr/share/zsh/site-contrib/oh-my-zsh"
[ -f /etc/centos-release ] && export ZSH="$HOME/.oh-my-zsh" [ -f /etc/centos-release ] && export ZSH="$HOME/.oh-my-zsh"
[ -f /etc/debian_version ] && export ZSH="$HOME/.oh-my-zsh" [ -f /etc/debian_version ] && export ZSH="$HOME/.oh-my-zsh"