gpg --verify detached signature from two file descriptors?

[Daniel Kahn Gillmor]

Hi GnuPG folks--

i'd like to use gpg to verify a detached signature, but for various
reasons i don't want to put either part (the body or the signature) in
the filesystem (i have the data queued in two otherwise anonymous file
descriptors).

if i put the body on FD 0, i can verify the detached signature with:

 gpg --verify sig -

but i still need to have the signature in a file in the file system.  Is
there a way to tell gpg to read the sig itself from a file descriptor as
well?

On some operating systems (in some configurations) it looks like i can
use (e.g.) /proc/self/fd/3 to read the signature from file descriptor 3,
but it would be nice to be more portable than that.

Any suggestions?

Thanks for gpg,

	--dkg

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