[fpc-pascal] EOF on stdin

[Marco van de Voort]

> I'm trying to distinguish between a case where there is no parameter on the 
> command line and where there is piped input. The code below works under Win-32 
> but under Linux Eof() waits for input:
> 
>    IF ParamCount = 0 THEN BEGIN		(* Case (1) or (2) *)
>      debug('No parameters (case 1 or 2)');
>      TRY
>        AssignFile(input, '');		(* Standard input		*)
> {$IOCHECKS OFF }
>        Reset(input);	// Returns zero
>        TRY
> 	IF Eof(input) THEN BEGIN	(* Case (1)	*)
>            debug('At EOF (case 1)');
> {$IOCHECKS ON }
> 
> // Nothing on command line.
> 
> 	END ELSE BEGIN			(* Case (2)	*)
>            debug('Not at EOF (case 2)');
> 
> // Got piped input.
> 
> If I start it under linux by piping an eof (i.e. echo -n |) it works.
> 
> I'm sure this is something that's been looked at before- how do I get it to work?

For unix one can simply use termio.isatty(input) I think.