add the shebang and parametters -v -V -h

network_control.sh

@@ -1,7 +1,7 @@
-
+#!/bin/sh
 # Script which control the network. Make the bridge, veth, dummy, brx alone without any help.
 
-version="0.0.1"
+version="0.0.2"
 usage="USAGE
     $(basename $0) [PARAMETTER] [COMMAND NAME]
 
@@ -16,7 +16,8 @@ DESCRIPTION
 
 PARAMETTER
     -h, --help      Print this help message and quit
-    -v, --version   Print the installed version of $(basename $0) and quit
+    -V, --version   Print the installed version of $(basename $0) and quit
+    -v, --verbose   Print more output for all actions.
 
 NAME
     Is the name of the vm to open
@@ -28,6 +29,29 @@ COMMAND
 
 "
 
-echo "$usage"
+print_usage() {
+    echo "${usage}"
+}
+
+print_version() {
+    echo "$(basename $0) v.${version}"
+}
+
+# first, test if there is help, version, or verbose args.
+for i in "$@"; do
+    case "$i" in
+        "-h" | "--help")
+            print_usage
+            exit 0
+            ;;
+        "-V" | "--version")
+            print_version
+            exit 0
+            ;;
+        "-v" | "--verbose")
+            set_verbose
+            ;;
+    esac
+done