[Gambas-user] Pipe doesn't receive contents

[Doriano Blengino]

Benoît Minisini ha scritto:
>
> Well, in a few words, don't mix the behaviour of Gambas, the C library and the 
> Linux kernel!
>   
So you are true. If someone says that tail(1) does not work with pipes, 
because eof has no meaning, he is right. If someone else demonstrates 
that it works, is wrong. Eof ("End-Of-File": E.nd O.f F.ile) in gambas 
does not mean the same thing as the rest of the world - in gambas it 
means "I can not read right now, you fool!". Who cares about C library 
and kernel, gambas does not use them, right? Anyway, in the system (and 
I bet in most languages), Eof means the same thing, always, no matter if 
coping with files, pipes, sockets, serial terminals and so on. This is 
the beauty of unix. In Gambas, Eof is good for true files; but not for 
pipes. For sockets, let me see a moment. For stdin, it depends: if it is 
a file, one thing; if it is a pipe, another thing; if it is a terminal, 
let me take a look (just a moment, you see, I use buffered non-blocking 
asynchronous sparse multi-line I/O and this is a complicated matter, it 
is not so simple like those stupid unix commands which, I don't know 
how, can run every aspect of a big unix system).

Sorry for the irony - take it with a smile (just a little english 
humor). I see your point, but perhaps you should explain better at 
first, without misleading phrases, and not at the end, after arguing to 
someone (me) which, unfortunately, has often different ideas than you. 
After all, gambas is not the only thing in the world - if it does some 
thing differently than what one expects, or differently from other, 
important systems, some explanation can be useful. Our friend Rolf did 
the most common sense thing everyone would do: use eof() to catch the 
end of a stream. Then, two different persons said that the problem was 
the pipe. It is not the pipe. It is that gambas treats pipes differently 
than regular files. This is the thing to point out. You are also 
entitled to say that it is a unix fault, that pipes are not files, you 
can say whatever you want. But as long as gambas runs on unix, and uses 
the C library, you must point out the differences about the underlying 
system. Or not? It's your choice.

Regards,
Doriano