>>> exec {var}>pathname
>> [...]
> 2) A "named fd" var once set is neither writable nor directly
> readable by the script; it is read-only except it is only "readable"
> by the implementation;
I don't like this; it makes it impossible to do things like put the fd
number on the command line of a program. Instead of
program -fd ${var}
you'd have to do something like
program -fd 3 3>&${var}
which, to me, defeats much (though admittedly not all) of the point.
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