added first version of minecraft server hosting tool

mc.sh

@@ -0,0 +1,125 @@
+#!/bin/bash
+
+# ******** minecraft control script ********
+# ******** using systemd + screen   ********
+
+# **** configuration ****
+user=minecraft
+path=/opt/$user
+bold="\033[1m"
+normal="\033[0m"
+red="\033[31m"
+green="\033[32m"
+yellow="\033[33m"
+
+
+# **** start of script ****
+
+state()
+{
+    if [ -r "$path/$2/minecraft_server.jar" ]; then
+        systemctl status $1@$2 > /dev/null
+	if [ $? -eq 0 ]; then
+            return 0
+	else
+            return 1
+	fi
+    else
+        return 2
+    fi
+}
+
+usage()
+{
+    echo -e "usage: mc option <server>\n\n  ${bold}Servers:${normal}"
+    servers=$(ls -l $path | grep '^d' | awk '{print $9}')
+    for server in $servers; do
+        state $user $server
+        if [ $? -eq 0 ]; then
+            echo -e "    [${green}✓${normal}] $server"
+        else
+            echo -e "    [${red}✗${normal}] $server"
+        fi
+    done
+
+    echo -e "\n  ${bold}Options:${normal}
+    help                 Print usage message
+    status               Print server(s)
+    start <server>       Start server instance
+    stop <server>        Stop server instance
+    console <server>     Connect to server console\n"
+}
+
+
+
+case "$1" in
+    h|help|-h|--help|status|a|-a|--status|l|ls|list|-l|--list)
+        usage
+        ;;
+    s|start|-s|--start)
+        if [ $2 ]; then
+            state $user $2
+	    value=$?
+	    if [ $value -eq 0 ]; then
+                echo -e "\n  [${yellow}☀${normal}] Server already up.($2)\n"
+	    elif [ $value -eq 1 ]; then
+                echo -e "\n  [${green}✓${normal}] Starting server.($2)\n"
+                sudo systemctl restart $user@$2
+	    else
+                echo -e "\n  [${red}✗${normal}] Server does not exist.($2)\n"
+		exit 1
+	    fi
+	else
+	    echo -e "\n  [${red}✗${normal}] No server given.\n"
+	    exit 1
+        fi
+        ;;
+    t|stop|-t|--stop)
+	if [ $2 ]; then
+            state $user $2
+	    value=$?
+	    if [ $value -eq 0 ]; then
+		echo -e "\n  [${yellow}☀${normal}] Stopping server. Sending 10 second notice.($2)"
+	        sudo systemctl stop $user@$2
+		echo -e "  [${green}✓${normal}] Stopped server.($2)\n"
+
+            elif [ $value -eq 1 ]; then
+                echo -e "\n  [${yellow}☀${normal}] Server already down.($2)\n"
+	    else
+		echo -e "\n  [${red}✗${normal}] Server does not exist.($2)\n"
+                exit 1
+	    fi
+	else
+            echo -e "\n  [${red}✗${normal}] No server given.\n"
+	    exit 1
+	fi
+        ;;
+    c|console|-c|--console)
+	if [ $2 ]; then
+	    state $user $2
+            value=$?
+	    if [ $value -eq 0 ]; then
+   	        echo -e "\n  [${yellow}☀${normal}] Connecting to server console on $user@$2."
+		echo -e "  [${yellow}☀${normal}] Exit console with: ${bold}Strg-a d${normal}\n"; sleep 5
+	        sudo -u $user /usr/bin/screen -R mc-$2
+	    elif [ $value -eq 1 ]; then
+		echo -e "\n  [${red}✗${normal}] Server not up.($2)\n"
+		exit 1
+	    else
+		echo -e "\n  [${red}✗${normal}] Server does not exist.($2)\n"
+		exit 1
+	    fi
+	else
+            echo -e "\n  [${red}✗${normal}] No server given.\n"
+	    exit 1
+	fi
+        exit 0
+        ;;
+    *)
+	usage
+        exit 1
+        ;;
+esac
+exit 0
+
+# **** end of script ****