Initial registration.

diff --git a/v7/src/imail/test-imap.scm b/v7/src/imail/test-imap.scm
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+;;; -*-Scheme-*-
+;;;
+;;; $Id: test-imap.scm,v 1.1 2000/04/22 05:12:26 cph Exp $
+;;;
+;;; Copyright (c) 2000 Massachusetts Institute of Technology
+;;;
+;;; This program is free software; you can redistribute it and/or
+;;; modify it under the terms of the GNU General Public License as
+;;; published by the Free Software Foundation; either version 2 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program; if not, write to the Free Software
+;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;;; Manually interact with IMAP server
+
+(declare (usual-integrations))
+\f
+(define (open-imap-socket host user password)
+  (let ((port (open-tcp-stream-socket host "imap2")))
+    (let ((line (read-line port)))
+      (write-string line)
+      (newline)
+      (let ((conn (make-imap-connection port)))
+       (imap-command conn "LOGIN" user password)
+       conn))))
+
+(define (close-imap-socket conn)
+  (close-port (imap-connection-port conn)))
+
+(define (imap-command conn command . arguments)
+  (let ((tag (apply send-imap-command conn command arguments))
+       (port (imap-connection-port conn)))
+    (let loop ()
+      (let ((response (imap:read-server-response port)))
+       (if (not (eof-object? response))
+           (begin
+             (pp response)
+             (if (not (and (memq (car response) '(OK NO BAD))
+                           (equal? tag (cadr response))))
+                 (loop))))))))
+
+(define (send-imap-command conn command . arguments)
+  (let ((tag (next-imap-command-tag conn))
+       (port (imap-connection-port conn)))
+    (let ((command
+          (decorated-string-append "" " " "" (cons* tag command arguments))))
+      (write-string command port)
+      (newline port)
+      (write-string command)
+      (newline))
+    (flush-output port)
+    tag))
+
+(define (resynchronize-imap-socket conn tag)
+  (let ((prefix (string-append tag " "))
+       (port (imap-connection-port conn)))
+    (let loop ()
+      (let ((line (read-line port)))
+       (if (not (eof-object? line))
+           (begin
+             (write-string line)
+             (newline)
+             (if (not (string-prefix? prefix line))
+                 (loop))))))))
+
+(define (next-imap-command-tag conn)
+  (let ((n (imap-connection-sequence-number conn)))
+    (set-imap-connection-sequence-number! conn (+ n 1))
+    (string-append "A" (string-pad-left (number->string n) 4 #\0))))
+
+(define-structure (imap-connection (constructor make-imap-connection (port)))
+  (port #f read-only #t)
+  (sequence-number 0))
\ No newline at end of file