#!/bin/bash
set -e

# handles package-based and from source (on slackware) ntp daemons
# todo - add chronyd

[[ -z $1 ]] && echo vendor? && exit 1
vendor=$1

if [[ $vendor = Debian || $vendor = Ubuntu ]]; then
	tmp=`dpkg -l | grep ntp | awk '{print $2}' | grep -vE '^sntp$'`
elif [[ $vendor = slackware ]]; then
	tmp=`ls -1 /var/log/packages/*ntp* 2>/dev/null` || true

	# will show executable path if the daemon is installed from source
	# openntpd does not offer a version argument
	# the best we have would be ntpd -dnvf /etc/openntpd.conf
	[[ ! -n $tmp ]] && tmp=`which ntpd`
else
	echo ERROR DONNO ABOUT $vendor DISTRO VENDOR
	exit 1
fi

output_lines=`echo "$tmp" | wc -l`

if [[ -z $tmp ]]; then
	echo ERROR THERE IS NO NTP PACKAGE INSTALLED
	echo "$tmp"
	exit 1
elif (( output_lines > 1 )); then
	echo ERROR THERE IS MORE THAN ONE NTP PACKAGE INSTALLED
	echo "$tmp"
	exit 1
else
	# we do print a carriage return at the end
	# this makes it compatible with both clusterit and ansible conditions against stdout|trim
	echo $tmp
fi