New xorriso-dd-target option -version

xorriso-dd-target/xorriso-dd-target

@@ -14,6 +14,10 @@
 # if $no_xorriso_dd_target_run is empty. It implements what xdt_print_usage
 # announces.
 
+xdt_print_version() {
+  echo "xorriso-dd-target , version 1.5.3 , 2020.01.06.204949"
+}
+
 
 ## This obtrusive setting shall make the script safe against exotic locales.
 ## Supposed to stabilize grep expression interpretation and error messages.
@@ -135,6 +139,7 @@ xdt_print_usage() {
   echo "                    -dummy -DO_WRITE even against the advice of"
   echo "                    this program. This probably shows you ways to"
   echo "                    shoot your own foot."
+  echo " -version           Print version text and then end the program."
   echo " -help              Print this text to stdout and then end the program."
   echo "Examples:"
   echo " $0 -with_sudo -list_all"
@@ -219,6 +224,7 @@ xdt_reset_job() {
   # Status
   xdt_sudo_cmd=
   xdt_have_su_power=
+  xdt_end_after_setup=
 
   return 0
 }
@@ -319,9 +325,15 @@ xdt_arg_interpreter() {
     elif test "X$xdt_i" = "X-no_pacifier"
     then
       xdt_no_pacifier=y
+    elif test "X$xdt_i" = "X-version"
+    then
+      xdt_print_version
+      xdt_end_after_setup=y
+      return 0
     elif test "X$xdt_i" = "X-help"
     then
       xdt_print_usage
+      xdt_end_after_setup=y
       return 0
     elif echo "X$xdt_i" | grep -v '^X-' >/dev/null
     then
@@ -865,6 +877,10 @@ xdt_main()
   
   xdt_reset_job
   xdt_arg_interpreter "$@" || return "$?"
+  if test -n "$xdt_end_after_setup"
+  then
+    return 0
+  fi
   
   if test -n "$xdt_do_plug_test"
   then