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Correct Number of Parameters

/ Published in: Bash
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Tests whether the script has been invoked with the correct number of parameters.

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  1. E_WRONG_ARGS=85
  2. script_parameters="-a -h -m -z"
  3. # -a = all, -h = help, etc.
  4. if [ $# -ne $Number_of_expected_args ]
  5. then
  6.    echo "Usage: `basename $0` $script_parameters"
  7.    # `basename $0` is the script's filename.
  8.    exit $E_WRONG_ARGS
  9. fi

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