#!/bin/sh
# --------
# File:        llxcfg-ntp-cli
# Description: Simple cli to chronyd using chronyc
# Author:      Luis Garcia Gisbert <garcia_luigis@gva.es>
# 
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software Foundation, Inc., 
# 51 Franklin St, Fifth Floor, Boston MA 02110-1301 USA
# --------


set -e
KEY_FILE="/etc/chrony/chrony.keys"
KEY_NUM="1"

die(){
	echo "$1" >&2
	exit 1
}

usage(){
	die "Usage: $(basename "$0") COMMAND\n\
       $(basename "$0") -f {CMD_FILE|-}\n\
       $(basename "$0") -t {TEMPLATE_FILE|-}"
}

dump_cmds(){
	if [ "$CMD_TXT" ] ; then
		echo "$CMD_TXT"
	elif [ "$CMD_FILE" ] ; then
		cat "$CMD_FILE"
	else
		llxcfg-template "$TMPL_FILE" || true
	fi
	return 0
}

# main

[ "$1" ] || usage
[ -r "$KEY_FILE" ] || die "Unable to read keyfile $KEY_FILE"
PASSWORD="$(sed -ne "/^$KEY_NUM[[:blank:]]/s%^.*[[:blank:]]%%p" "$KEY_FILE")"
[ "$PASSWORD" ] || die "Unable to read password for key number $KEY_NUM in $KEY_FILE"
CMD_FILE=""
TMPL_FILE=""
CMD_TXT=""

case "$1" in
	-f|-t)
		CMD_FILE="$2"
		[ "$CMD_FILE" ] || usage
		[ "$CMD_FILE" = "-" ] || [ -r "$CMD_FILE" ] || usage
		if [ "$1" = "-t" ] ; then
			TMPL_FILE="$CMD_FILE"
			CMD_FILE=""
		fi
		;;
	*)
		CMD_TXT="$*"
		;;
esac

# do the job
chronyc << EOF
password $PASSWORD
$(dump_cmds)
quit
EOF

exit 0