Script for managing game servers using tmux to run in the background

server_control_script.sh

#!/bin/bash
# ---------------------------------------------
# Script for starting and stoping game servers
# start | stop | restart | status | console
# ---------------------------------------------
# Exit Codes:
# 0 = running
# 1 = stopped
# 2 = other

################################################
################### Settings ###################
################################################

# Game Name
# Can be anything. Used for feedback in the console
GAMENAME="Just Cause 3"

# Game Shorthand
# Used to identify server process. Recommended to set to same as name of this script
GAMEID="jc3server"

# Server Executable
# Name of the executable server file
# Can be used with flags: SERVEREXEC="Server -flag1"
SERVEREXEC="Server"

# Exit Command
# Command to stop the server
GAMEEXIT="exit"

# Config Commands
# Gets passed to exec
CONFIG=""

################################################
#################### Script ####################
################ Edit with care ################
################################################

GAMEPID=$(pidof $GAMEID)

startme() {
	echo -e "[\033[0;33m ... \033[0m] Starting $GAMENAME Server"
	case "$(pidof $GAMEID | wc -w)" in
		0)	tmux new-session -d -s $GAMEID 'bash -c "exec -a $GAMEID ./$SERVEREXEC $CONFIG"'
		   	echo -e "[\033[0;32m Done \033[0m] $GAMENAME Server started"
				exit 0
				;;
		1)	echo -e "[\033[0;31m Failed \033[0m] $GAMENAME Server already running"
				exit 2
				;;
	esac
}

stopme() {
	echo -e "[\033[0;33m ... \033[0m] Stopping $GAMENAME Server"
	case "$(pidof $GAMEID | wc -w)" in
		0) 	echo -e "[\033[0;31m Failed \033[0m] $GAMENAME Server is already stopped"
				exit 2
				;;
		1)	tmux send-keys -t $GAMEID C-z $GAMEEXIT Enter
				end=$((SECONDS+30))
				secs=$((30))
				while [ $SECONDS -lt $end ]; do
					case "$(pidof $GAMEID | wc -w)" in
						0) 	echo -e "[\033[0;32m Done \033[0m] $GAMENAME Server stopped"
								exit 1
								;;
						1)	echo -ne "[\033[0;33m ... \033[0m] Waiting for graceful exit: $secs\033[0K\r"
   							sleep 1
   							secs=$((secs - 1))
								continue
								;;
					esac
					:
				done
				echo -e "[\033[0;31m Failed \033[0m] Could not exit gracefully. Killing process"
				kill $GAMEPID
				echo -e "[\033[0;32m Done \033[0m] $GAMENAME Server stopped"
				exit 1
	esac
}

viewme() {
	echo -e "[\033[0;33m ... \033[0m] Accessing Console of $GAMENAME Server"
	case "$(pidof $GAMEID | wc -w)" in
		0) 	echo -e "[\033[0;31m Failed \033[0m] $GAMENAME Server is stopped" ;;
		1)	echo -e "Don't exit with\033[0;33m Ctrl-C\033[0m. This will kill the Server. Use\033[0;33m Ctrl-B D \033[0m"
				read -p "Understood? (y/n)? " answer
				case ${answer:0:1} in
		  		y|Y )
		       	 	tmux attach -t $GAMEID
		   	 			;;
		   	 	* )
		        	exit 2
		    			;;
				esac
				echo -e "[\033[0;32m Done \033[0m] Exited Console"
				;;
	esac
}

statusme() {
	echo -e "[\033[0;33m ... \033[0m] Checking Status of $GAMENAME Server"
	case "$(pidof $GAMEID | wc -w)" in
		0) 	echo -e "[\033[0;31m Stopped \033[0m] $GAMENAME Server is stopped"
				exit 1
				;;
		1)	echo -e "[\033[0;32m Running \033[0m] $GAMENAME Server is running"
				exit 0
				;;
	esac
}

case "$1" in
    start) 		startme ;;
   	stop) 		stopme ;;
   	restart) 	stopme; startme ;;
		console)	viewme ;;
		status) 	statusme ;;
    *)
    	echo -e "Usage: $GAMEID start|stop|restart|status|console"
      exit 2
      ;;
esac