sunterlib/scsh/tmail/tforks.scm

;;; tforks.scm - a scheme daemon child process
;;;
;;; Copyright (c) 2011-2012 Johan Ceuppens
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; 1. Redistributions of source code must retain the above copyright
;;;    notice, this list of conditions and the following disclaimer.
;;; 2. Redistributions in binary form must reproduce the above copyright
;;;    notice, this list of conditions and the following disclaimer in the
;;;    documentation and/or other materials provided with the distribution.
;;; 3. The name of the authors may not be used to endorse or promote products
;;;    derived from this software without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
;;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
;;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
;;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
;;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
;;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
;;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
;;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

(load "util.scm")
(load "trecords.scm")
(load "tmailbox-load.scm")

(define (run-daemon-child-mail rec)
  (let ((*hostname (hostname rec))
        (*port (port rec))
        (*socket (socket rec))
        (*motd (motd rec))
        (*ack (ack rec))
        (*apop (apop rec))
        (*stat (stat rec))
        (*list (list rec))
        (*bye (bye rec)))

    (set! *socket (open-socket *port))

    (for-each display '("Opening listening socket on host : "
                        *hostname
                        " port : "
                        *port
                        (eoln)))

    ((lambda ()
       (call-with-values
           (lambda ()
             (socket-accept *socket))
         (lambda (in out)
           (write *motd out)
           (let ((answer (read (make-string-input-port in))))
             (for-each display '((servermsg) (symbol->string answer)))
             (if (symbol? answer)
                 (cond ((eq? 'APOP answer)
                        (write mailbox-contents out)
                        )
                       ((eq? 'STAT answer)
                        #t)
                       ((eq? 'LIST answer)
                        #t)
                       ((eq? 'RETR answer)
                        (let ((answer2 (read (make-string-input-port in))))
                          (let ((idx (string->number (symbol->string answer3))))
                            (if idx
                                (write (tmail-get-mail-with-index (getenv "USER") idx) out)))))
                       ((eq? 'USER answer)
                        (let* ((answer2 (read (make-string-input-port in)))
                               ((username (if (number? answer2)
                                              (number->string answer2)
                                              (symbol->string answer2)))))
                          (setenv "USER" username)
                          (write "+OK user accepted - not implemented" out)))
                       ((eq? 'PASS answer)
                        (let* ((answer2 (read (make-string-input-port in)))
                               (pass (if (number? answer2)
                                         (number->string answer2)
                                         (symbol->string answer2))))
                          (write "+OK password accepted - not implemented" out)))
                       ((eq? 'QUIT answer)
                        (write *bye out)
                        (close-input-port in)
                        (close-socket *socket)
                        (close-output-port out)
                        (exit))
                       (else
                        (write (errormsg) out))
                       ))
             )))))


    (let ((answer2 (read (make-string-input-port in))))
      (for-each display '((servermsg) (symbol->string answer2)))
      (write *bye out)
      (close-input-port in)
      (close-socket *socket)
      (close-output-port out)
      (exit))))