diskimage-builder/elements/dhcp-all-interfaces/install.d/50-dhcp-all-interfaces

#!/bin/bash

if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

SCRIPTDIR=$(dirname $0)

# this script is not needed on Gentoo.
if [ "$DISTRO_NAME" != "gentoo" ]; then
    install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.sh /usr/local/sbin/dhcp-all-interfaces.sh
fi

DIB_INIT_SYSTEM=$(dib-init-system)
if [ "$DIB_INIT_SYSTEM" == "upstart" ]; then
    if [ -e "/etc/redhat-release" ] ; then
        # the init system is upstart but networking is using sysv compatabiliy (i.e. Centos/RHEL 6)
        install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.init /etc/init.d/dhcp-all-interfaces
        chkconfig dhcp-all-interfaces on
    else
        install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.conf /etc/init/dhcp-all-interfaces.conf
    fi
elif [ "$DIB_INIT_SYSTEM" == "systemd" ]; then
    install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-interface@.service /usr/lib/systemd/system/dhcp-interface@.service
    install -D -g root -o root -m 0644 ${SCRIPTDIR}/dhcp-all-interfaces-udev.rules /etc/udev/rules.d/99-dhcp-all-interfaces.rules
elif [ "$DIB_INIT_SYSTEM" == "sysv" ]; then
    install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.init /etc/init.d/dhcp-all-interfaces
    update-rc.d dhcp-all-interfaces defaults
elif [ "$DISTRO_NAME" == "gentoo" ]; then
    # let ipv6 use normal slaac
    sed -i 's/slaac/#slaac/g' /etc/dhcpcd.conf
    # don't let dhcpcd set domain name or hostname
    sed -i 's/domain_name\,\ domain_search\,\ host_name/domain_search/g' /etc/dhcpcd.conf
    rc-update add dhcpcd default
fi