25 The "calib/prompt.h" Header.

The "calib/prompt.h" header contains a single function:

	void	calib_prompt (const char * str);

It prints out the given string as a “prompt” — but only if stdin is a tty (i.e., we are receiving interactive input from a user, not input from a file). This function is used by various CALIB test programs, and could perhaps be useful in other contexts.