accessing shell variables from within awk?

[Andy Behrens]

In answer to the question "How can I access a shell variable from within
awk", guy at gorodish.Sun.COM (Guy Harris) writes:
>
> You can put assignments on the command line,
> which might be a way to pass them to "awk", e.g.
>
>	awk -f awkfile foo="$foo"

If you are going to use this feature, be aware that many versions of awk
only recognize command-line assignments if they are followed by at least
one filename.  If you want awk to read from the standard input, explicitly
name it with '-', e.g.

	ls -l | awk -f awkfile foo="$foo" -

--
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					Andy Behrens
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