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addon-context-linux/base_arch/etc/one-context.d/15-hostname

27 lines
604 B

#!/bin/bash
CONFIG_FILE="/etc/hostname"
function set_hostname() {
NAME=$1
[ -n "$NAME" ] || exit 0
hostnamectl set-hostname $NAME
}
function get_dns_name() {
first_ip=$(hostname -I | cut -d' ' -f1)
text=$(host $first_ip)
[ $? = 0 ] || exit 0
[[ $text == *"has no PTR record" ]] && exit 0
name=$(echo "$text" | awk '{print $(NF)}' | sed 's/\.$//')
echo $name
}
if [ -n "$SET_HOSTNAME" ]; then
set_hostname $(echo "$SET_HOSTNAME" | sed -e 's/[^-a-zA-Z0-9]/-/g' -e 's/^-*//g' -e 's/-*$//g')
elif [ -n "$DNS_HOSTNAME" ]; then
set_hostname $(get_dns_name)
fi