Hello Stephen and Herbert,

Stéphane Chazelas just made a complete proposal:


1) [n1]<&n2    Redirect standard input (or fd n1) from the same
               resource as open on fd n2.

2b) [n1]>&n2   Redirect standard output (or fd n1) to
               the same resource as open on fd n2.


What do you think about?

Regards,

-- 
Stéphane Aulery
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