[clisp-list] How to open file descriptor with CLISP?

[Jean L. <bu...@gn...>]

I am looking into solution to open file descriptor in CLISP, and to
get its fileno, that I can feed files to GNU mailutils, mail program
to file descriptors.

Basically, into functionality that is shown in the sample Perl program
here: http://mailutils.org/wiki/Mail:_sending_attachments -- relating
to opening file descriptor and getting its number.

Jean