http://qs321.pair.com?node_id=532999

fireartist has asked for the wisdom of the Perl Monks concerning the following question:

Is there a way to check whether binmode() has been called on a filehandle?

If not, I notice in the perl source file PerlIO/via/via.xs that there's a method PerlIO_modestr which might help, but I lack the tuits to look into this further. Any pointers appreciated.