diskimage-builder/elements/base/dib-init-system

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#!/bin/bash
set -eu
set -o pipefail
if [ -f /sbin/initctl ]; then
echo "upstart"
elif [ -f /usr/bin/systemctl ]; then
echo "systemd"
elif [ -f /sbin/init ]; then
if [ -f /bin/systemd ]; then
echo "systemd"
else
echo "sysv"
fi
else
echo "Unknown init system"
exit 1
fi