some kind of binary sed(1) command

[Matthias Apitz]

Hello,

I have a normal ASCII file wich has in some places two lines of '*',
separated by an empty line, i.e.

....\n
*********************\n
\n
*********************\n
....\n

and I want to substitute the \n between the star lines by \f; the
'binary' sed command would just be 

	s/*****\n\n*****/*****\n\f*****/

which ofc does not work with sed(1) because it is line oriented;
I could write something in perl, C, awk or whatever language, but I
would prefer to do it with the normal commands... any ideas?

Thanks

	matthias
-- 
Matthias Apitz
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