rec

#!/usr/bin/env bash
###########################################################################
# Made by    : Ewoud Dronkert
# Licence    : GNU GPL v3
# Platform   : Raspberry Pi, Raspbian
# Requires   : bash, streamripper, mpd, mpc
# Location   : /usr/local/bin, ~/bin
# Name       : rec
# Version    : 1.0.0
# Date       : 2017-01-01
# Purpose    : Record audio streams playing with mpd ("radio recorder").
# How to use : Call script to start recording the currently playing stream.
#              Call again to stop recording and get a list of files.
#              Probably only works cleanly when called as user pi from
#              homedir of user pi, because of check for existing nohup.out
#              and .cue files. I guess I should fix that..
# Output     : Status message on stdout, .mp3 file saved in /home/pi
###########################################################################

# Get homedir of user pi
DIR=$(cat /etc/passwd | grep -e '^pi:' | cut -d':' -f6)

# Check for streamripper executable, used to record audio stream
RIP=streamripper
EXE=$(which $RIP)
[ -z "$EXE" ] && echo "Install $RIP: sudo apt-get update && sudo apt-get install $RIP" && exit 1

# Check for mpc executable, used to get stream URL from mpd
EXE=$(which mpc)
[ -z "$EXE" ] && echo "Install mpc: sudo apt-get update && sudo apt-get install mpc" && exit 2

# Check if streamripper already running
PID=$(pgrep $RIP)
if [ -z "$PID" ]; then
	# Not running. Check if mpd is playing
	URL="$(mpc --format %file% | grep http)"
	if [ -n "$URL" ]; then
		# Record audio stream to .mp3 file
		REC="$(date '+%Y%m%d%H%M%S').mp3"
		nohup $RIP "$URL" -d "$DIR" -s -a "$REC" -A -T --quiet &
		echo
		echo "    Now recording $URL ..."
		echo
	else
		echo
		echo "    No stream found, not recording."
		echo
	fi
else
	# Already recording, now stopping
	killall $RIP
	# Clean up output and .cue files
	rm -f "$DIR/nohup.out" 2>/dev/null
	rm -f "$DIR"/*.cue 2>/dev/null
	# Overview
	echo
	echo "    Recording stopped. Today's recordings:"
	echo
	ls -l "$DIR/$(date '+%Y%m%d')"*.mp3
	echo
fi