context-grep

[Francois-Michel Lang]

I recall some time ago there was a discussion of some kind of
variation on grep that could be used to show, e.g.,
all lines in a file containing "foo" occurring within, say,
6 lines of a line containing "bar".

Is there anything available that will do this?
I think I can use awk to do a watered-down version of this,
but if it's already available somewhere, I'd love to see it!

Many thanks.
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Francois-Michel Lang
Paoli Research Center, Unisys Corporation lang at prc.unisys.com (215) 648-7256
Dept of Comp & Info Science, U of PA      lang at cis.upenn.edu  (215) 898-9511