#!/bin/sh
#
# 2019 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# Retrieve the persistent hostname
#

# Firstly, check hostnamectl if available.
if command -v hostnamectl >/dev/null
then
	hostnamectl status --static && exit 0
fi

# In case hostnamectl is missing or failed:
# Fall back to alternative OS-specific approaches.
case $("$__explorer/os")
in
	alpine|archlinux|coreos|debian|devuan|suse|ubuntu)
		[ -f /etc/hostname ] && cat /etc/hostname
		;;
	suse)
		[ -f /etc/HOSTNAME ] && cat /etc/HOSTNAME
		;;
	centos|fedora|redhat|scientific)
		[ -f /etc/sysconfig/network ] \
			&& (. /etc/sysconfig/network && echo "$HOSTNAME")
		;;
	freebsd)
		(. /etc/rc.conf && echo "$hostname")
		;;
	netbsd)
		if grep -q '^hostname=' /etc/rc.conf
		then
			(. /etc/rc.conf && echo "$hostname")
		elif [ -f /etc/myname ]
		then
			# Fall back to /etc/myname file
			cat /etc/myname
		fi
		;;
	openbsd)
		cat /etc/myname
		;;
	macosx)
		scutil --get HostName 2>/dev/null
		;;
esac