Implementation Language:
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R5RS Scheme without macros with the following extensions:


[procedure] (command-line-arguments)

  Returns a list of all command-line arguments to the current
  process (excluding the program name) as a list of strings.


[procedure] (current-error-port) 

  Returns port representing the current error output ("stderr").


[procedure] (exit [STATUSCODE])

  Exits the current program and returns a status-code, which
  defaults to 0.


[procedure] (error MESSAGE [ARGUMENTS ...])

  Shows an error-message with optional arguments and exits
  the program, returning a non-zero status-code.
 
  (SRFI-23)
