$ echo ${.sh.version}
Version jM 93u 2011-02-08
$ getopts --man
... ...
3. An option argument specification. Options that take arguments can
be
followed by : (string value) or # (numeric value) and an option
argument specification. An option argument specification consists
of
the option argument name as field 1. The remaining : separated
fields
are a type name and zero or more of the special attribute words
listof, oneof, and ignorecase. A default option value may be
specified in the final field as :=default. The option argument
specification may be followed by a list of option value
descriptions
enclosed in braces. A long option that takes an argument is
specified
as --longname=value. If the : or # is followed by ? then the
option
argument is optional. If only the option character form is
specified
then the optional argument value is not set if the next argument
starts with - or +.
... ...
$
Here it's not clear what "listof, oneof and ignorecase" means and how it
would be used. Please clarify more.
(See also the discussion @comp.unix.shell:
https://groups.google.com/d/msg/comp.unix.shell/lOWZPy_22pI/5d8E-xu6d1UJ )
-Clark
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