#!/bin/sh                                                                        
display_help() { cat << "end-of-help-text"

/*--- Start of help text ------------------------------------------------------  
                                                                                
  here goes your description.
  add as many line as you need

  use empty lines to structure the help text
  
  there is no meaning in the first and last line
  looking as if they where comment line. they
  are simply optical separates I chose.

--- End of help text --------------------------------------------------------*/

end-of-help-text
# DO NOT CHANGE the previous, this and the next 2 lines marking the              
# end of the "display_help" function                                                
}    # End of function "display_help"

if test -z "$1"
then
  echo "Error: Parameter 1 is missing."
  display_help
  exit 1
  fi