rtorrent

#!/bin/sh
### BEGIN INIT INFO
# Provides: rtorrentd
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start/Stop/Restart rTorrent as a service.
### END INIT INFO

### Variables to help to color the output messages
#-----------------------------------------------------------------------------------------
txtred=$(tput setaf 1)                                         # Red
txtgrn=$(tput setaf 2)                                         # Green
txtylw=$(tput setaf 3)                                         # Yellow
txtrst=$(tput sgr0)                                            # Text reset to bash default

### Service Configuration
#-----------------------------------------------------------------------------------------
# rTorrent Configurations
svcUser="root"                                                 # User running the instance of rtorrent
svcBin=`which rtorrent`                                        # rtorrent binary location
svcConf=`su $svcUser -c "echo $HOME"`/.rtorrent.rc             # configuration for rtorrent
svcDtachFile=`su $svcUser -c "echo $HOME"`/rtorrent.dtach      # dtatch session file

### Functions
#-----------------------------------------------------------------------------------------
chkcfg(){

	command -v $svcBin >/dev/null 2>&1 || { echo >&2 "[$txtylw Warn $txtrst] I require$txtylw rtorrent$txtrst but it's not installed or was not found. Aborting."; exit 1; }
	command -v dtach >/dev/null 2>&1 || { echo >&2 "[$txtylw Warn $txtrst] I require$txtylw dtach$txtrst but it's not installed or was not found. Aborting."; exit 1; }

	if [ ! -r $svcConf ]; then
		echo "[$txtred Error $txtrst] Configuration file $txtylw$svcConf$txtrst is missing or it's unreadable by the service user $txtylw$svcUser$txtrst. Aborting."
		exit 1
	fi
}

chksvc(){
	rtPID=$(pidof -s $svcBin)
}

start(){
	chksvc
	if [ $rtPID ]; then
		 echo "[$txtylw Warn $txtrst] rtorrent already running: PID $rtPID"
		exit 1
	else
		if [ -S $svcDtachFile ]; then
			echo "[$txtylw Warn $txtrst] Unclean daemon shutdown was detected, cleaning previous session rtorrent dtach file ..."
			unlink $svcDtachFile
		fi
		su -l $svcUser -c "dtach -n $svcDtachFile $svcBin -n -o import=$svcConf"
		chksvc
		if [ $rtPID ]; then
			echo "[$txtgrn Ok $txtrst] rtorrent running: PID $rtPID"
		fi
	fi
}

stop(){
	chksvc
	if [ ! $rtPID ]; then
		echo "[$txtylw Warn $txtrst] Unable to find any running rtorrent instance"
		exit 1
	else
		echo "[$txtgrn OK $txtrst] rtorrent Daemon stopped"
		kill -9 $rtPID
	fi
}

status(){
	chksvc
	if [ $rtPID ]; then
		echo "[$txtgrn Ok $txtrst] rtorrent is up and running: PID $rtPID"
	else
		echo "[$txtylw WARN $txtrst] Could not find a running rtorrent daemon"
	fi
}

### Code execution
#---------------------------------------------------------------------------------------
rtPID=0
chkcfg

case $1 in
        'start')
			start
			;;
        'stop')
			stop
			;;
	'restart')
			stop
			start
			;;
        'status')
			status
			;;
        *)
			echo "Daemon usage: $0 {start|stop|restart|status}"
			;;
esac

exit 0