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bash command line args

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  1. while true; do
  2.     case "$1" in
  3.       -h|--help|-\?) show_help; exit 0;;
  4.       -v|--verbose) verbose=1; shift;;
  5.       -a) if [ $# -gt 1 ]; then
  6.             UNAME=$2; shift 2
  7.           else 
  8.             echo "-a requires an argument" 1>&2
  9.             exit 1
  10.           fi ;;
  11.       --) shift; break;;
  12.       -*) echo "invalid option: $1" 1>&2; show_help; exit 1;;
  13.       *)  break;;
  14.     esac
  15. done

URL: http://mywiki.wooledge.org/BashFAQ#BashFAQ.2BAC8-035.How_can_I_handle_command-line_arguments_.28options.29_to_my_script_easily.3F

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