[fpc-pascal] how to test if a file is open to write?

[Bernd]

2011/7/15 Sven Barth <pascaldragon at googlemail.com>:

> Hmm... I don't know whether I understand your intension correctly, but do
> you know about the unit "IOStream"?

I know about streams and use all sorts of streams every day, but what
i don't know very much about is the old pascal-ish way of handling
files that I have not used for ages now (assign(), rewrite() and
friends)