[plt-scheme] How to seek backward an input file

From: libe4 at free.fr (libe4 at free.fr)
Date: Sat Mar 12 17:12:00 EST 2005

Hi !

My name is Lionel, I'm student of the famous Scheme's teacher Jean Paul Roy at
the Nice University, France...

I have a very specific question to ask. (this is my first mail)

How can I seek backward for something one or two lines before in a file with
Scheme opened with (open-input-file... ?

Thanks by advance.

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