Owner Group is now selectable and will be created if non existent

installers/common.sh

@@ -1,5 +1,6 @@
 msm_dir="/opt/msm"
 msm_user="minecraft"
+msm_group="minecraft"
 dl_dir="$(mktemp -d -t msm-XXX)"
 
 # Outputs an MSM INSTALL log line
@@ -30,6 +31,13 @@ function config_installation() {
         msm_user="$input"
     fi
 
+    echo -n "New server group to be created [${msm_group}]: "
+    read input
+    if [ ! -z "$input" ]; then
+        msm_group="$input"
+    fi
+
+
     echo -n "Complete installation with these values? [y/N]: "
     read answer
 
@@ -57,13 +65,19 @@ function add_minecraft_user() {
     sudo useradd ${msm_user}
 }
 
+# Verifies existence of or adds group for Minecraft server (default "minecraft")
+function add_minecraft_group() {
+    install_log "Creating default group '${msm_group}'"
+    sudo groupadd ${msm_group}
+}
+
 # Verifies existence and permissions of msm server directory (default /opt/msm)
 function create_msm_directories() {
     install_log "Creating MSM directories"
     if [ ! -d "$msm_dir" ]; then
         sudo mkdir -p "$msm_dir" || install_error "Couldn't create directory '$msm_dir'"
     fi
-    sudo chown -R $msm_user:$msm_user "$msm_dir" || install_error "Couldn't change file ownership for '$msm_dir'"
+    sudo chown -R $msm_user:$msm_group "$msm_dir" || install_error "Couldn't change file ownership for '$msm_dir'"
 }
 
 # Fetches latest msm.conf, cron job, and init script
@@ -151,6 +165,7 @@ function install_complete() {
 function install_msm() {
     config_installation
     add_minecraft_user
+    add_minecraft_group
     update_system_packages
     install_dependencies
     create_msm_directories