KSH substring function (is it on your system?)

[chris]

As long as we're talking about 'substring', 'expr' has a 'substr' option
that used to be documented in V6.

It goes:
	expr substr string n m

	where n is the first character of the sub-string and m the length.

	so:		expr substr abcdefgh 2 4
	gives:		bcde

'expr' also has 'match', 'lentgh', and 'index' options that are not
documented any longer. Anyone knows why?

Chris
-- 

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