radio

#!/usr/bin/env bash
#######################################################################
# Made by    : Ewoud Dronkert
# Licence    : GNU GPL v3
# Platform   : Mac OS X
# Requires   : Bash, ssh, ssh-key access to remote
#              on remote: piradio script, mpd, mpc
# Location   : ~/bin/
# Name       : radio
# Version    : 1.0.1
# Date       : 2014-12-02
# Purpose    : Execute local radio command on remote host
#              Check if host is up using dig, if available
# Parameters : any parameter for remote piradio command
# Exit     0 : success
#          1 : ssh not found
#          2 : host down
#######################################################################

REMOTEHOST=${MPD_HOST:-'black'}     # use MPD_HOST if set, or default
REMOTEUSER=pi                       # ssh user name on remote
REMOTEPORT=22000                    # ssh port on remote

SSHBIN=/usr/bin/ssh
if [ ! -x $SSHBIN ]; then
	echo "Can't execute $SSHBIN" >&2
	exit 1
fi

DIGBIN=/usr/bin/dig
if [ -x $DIGBIN ]; then
	DNSSERVER=192.168.178.1     # DNS service of DSL modem
	DNSSUFFIX=.fritz.box        # LAN suffix used by DSL modem
	REMOTEADDR=$($DIGBIN @$DNSSERVER $REMOTEHOST$DNSSUFFIX A +short)
	if [ -z "$REMOTEADDR" ]; then
		echo "Host $REMOTEHOST unreachable." >&2
		exit 2
	fi
fi

$SSHBIN -x -p $REMOTEPORT $REMOTEUSER@$REMOTEHOST piradio "$*"
exit 0