Re: [9fans] APE question

["Howard Trickey" <howard@research.bell-labs.com>]

> under APE, the following part of code:

>       printf("\nQuit [q], confirm [y], or change [menu] settings: ");
>        /* read one char */
>        ch = getchar();

According to the C standard, "The standard input and output streams are
fully buffered if and only if the stream can be determined not to refer to
an interactive device."  It doesn't say whether to use line buffering or no
buffering in the interactive case.  I chose line buffering.  So the above
might have worked if you'd put a '\n' at the end of the printf string.  (But
only "might": the code to test whether a file is "interactive" ---
isatty --- is hacky in the extreme, and only works sometimes; with Plan 9's
namespace stuff, it is hard to get right.)

As well as the fflush solution given earlier, you could also put a call like

	setvbuf(stdout, _IONBF, BUFSIZ);

near the beginning of your program.  But the fflush solution is probably
better.