local and external IP bash resolver

myip

#!/bin/sh
# myip
# juanfc 2024-01-11


# wget http://ipinfo.io/ip -qO -
# ipconfig getifaddr en0 2>/dev/null || ipconfig getifaddr en1 2>/dev/null
# dig +short myip.opendns.com @208.67.222.222
# dig +short myip.opendns.com @resolver1.opendns.com
# ipconfig getifaddr en0 2>/dev/null || ipconfig getifaddr en1 2>/dev/null

# https://stackoverflow.com/questions/33743824/how-to-print-my-public-ip-address-in-the-terminal-using-wget

if [[ $# > 0 ]]; then
    if [[ $@ = "-h" ]]; then
        printf "$0 [-h|anything]\n"
        printf "\twithout arguments print external IP\n"
        printf "\twith any argument different than -h, the local IP\n"
        printf "\twith -h, this help\n"
    else
        ipconfig getifaddr en0 2>/dev/null || ipconfig getifaddr en1 2>/dev/null
    fi
else
    curl https://ipecho.io/plain
    echo
fi