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Date: Thu, 10 Jun 2010 17:18:54 +0100
From: RW <rwmaillists@googlemail.com>
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Subject: sh  ++/--  operators
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FreeBSD's sh (in 8.0) doesn't seem to support the ++ or -- arithmetic
operators 

  $ echo "$((n++))"
  arithmetic expression: syntax error: "n++"

Am I wrong in thinking these are POSIX operators? It seems odd if they
were simply left-out..