UNIX admin wrote:
I really don't understand why you would be willing to push your luck using Korn shell expressions in Bourne.
Check SUSv3, 2.6.4 Arithmetic Expansion. I don't think it matters who invented it, as it is now a standard feature.
My point was actually not about how shell scripts should be written but to indicate that there exists a problem with making standard-compliant scripts #! executable in a portable way.
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