;;; -*- Mode:Lisp; Readtable:ZL; Package:USER; Base:10; Patch-File:T -*-
;;; Patch file for System version 123.62
;;; Reason:
;;;  FTP probe streams were returning bogus :truenames for files that didn't exist --
;;;  resulting in (probe-file) returning non-NIL when it shouldn't have.
;;; Written 20-Oct-87 18:19:27 by pld (Peter L. DeWolf) at site LMI Cambridge
;;; while running on Jack Flanders from band 2
;;; with Don't-dump-a-band! Inconsistent (unreleased patches loaded) System 123.61, Experimental Local-File 73.0, Experimental FILE-Server 22.0, Experimental Unix-Interface 11.0, Experimental Tape 18.0, Experimental KERMIT 34.0, Experimental ZMail 71.0, Experimental Lambda-Diag 15.0, microcode 1754, SDU Boot Tape 3.12, SDU ROM 8.



; From modified file DJ: L.NETWORK.IP-TCP.USER; FTP-ACCESS.LISP#23 at 20-Oct-87 18:19:27
#10R FILE-SYSTEM#: 
(COMPILER-LET ((*PACKAGE* (PKG-FIND-PACKAGE "FILE-SYSTEM")))
  (COMPILER::PATCH-SOURCE-FILE "SYS: NETWORK; IP-TCP; USER; FTP-ACCESS  "

(defmethod (ftp-access :open) (file pathname
			       &key &optional
			       (direction :input)
			       (characters t)
			       (byte-size :default)
			       (error t)
			       if-exists ; if-does-not-exist
			       raw-directory-list
			       &allow-other-keys &aux probe-stream)
  (cond ((memq direction '(nil :probe))
	 (make-instance 'ftp-probe-stream
			:truename nil
			:pathname pathname
			:host host
			:raw-data
			(and (ftp-directory-line-parserp host t)
			     (with-output-to-string (s)
			       (with-open-file (d file :raw-directory-list t)
				 (stream-copy-until-eof d s))))))
	('else
	 (when (and (memq direction *ftp-probe-before-open-directions*)
		    ;; :output is bogus for two reasons here.
		    ;; (1) file might not already exist.
		    ;; (2) creation date is a screw.
		    ;; but we expect to have probe-before-open set to T
		    ;; and directions be '(:INPUT) in release version
		    ;; because that is safe and efficient.
		    (not raw-directory-list)
		    (or (eq *ftp-probe-before-open-p* t)
			(memq (send host :system-type)
			      *ftp-probe-before-open-p*)
			(get host :ftp-probe-before-open-p)))
	   (setq probe-stream (open file :direction nil))
	   (when (and (eq direction :output)
		      (memq (send file :version) '(nil :newest)))
	     (cond ((not (send probe-stream :truename))
		    (send probe-stream :set-truename
			  (send file :new-version 1)))
		   ((numberp (send (send probe-stream :truename) :version))
		    ;; kludge-a-rama. The *FTP-PROBE-BEFORE-OPEN-P* is useful
		    ;; if the host cant take so many simultaneous servers
		    ;; as would be created if we probe *after* the opening of
		    ;; the file data connection. The most sensible solution to
		    ;; all of this is to use another file protocol.
		    (send probe-stream :set-truename
			  (send (send probe-stream :truename)
				:new-version (1+ (send (send probe-stream :truename)
						       :version))))))
	     (when (not (plist probe-stream))
	       (setf (plist probe-stream)
		     `(:creation-date ,(time:get-universal-time))))))
	 (handling-file-errors (error)
	   (allocating-host-unit (unit)
	     (let ((command (if raw-directory-list
				"LIST ~A"
			      (ecase direction
				(:output
				 (caseq if-exists
				   (:append "APPE ~A")
				   (t "STOR ~A")))
				(:input "RETR ~A")))))
	       (if (and (eq byte-size :DEFAULT) (eq characters t))
		   (setq byte-size 8))
	       (cond ((and (eq characters :DEFAULT)
			   (eq byte-size :DEFAULT))
		      ;; almost no way of getting this information
		      ;; unix uses magic numbers, on VMS maybe character if
		      ;; record format variable length CR.
		      ;; for now kludge it so that at least load works on
		      ;; qfasl files.
		      (multiple-value (characters byte-size)
			(kludge-ftp-characterp file pathname)))
		     ((eq byte-size :default)
		      (setq byte-size 8)))
	       (cond (characters
		      ;; in fact if the host is a unix host then
		      ;; binary mode with our own easier-to-do translation
		      ;; would be better than forcing kludgy ascii
		      ;; translation to happen on both hosts.
		      (send unit :setascii))
		     ('else
		      (send unit :setbinary byte-size)))
	       (ftp-access-operation file unit :initconn direction)
	       (multiple-value-bind (c code)
		   (send unit :command
			 command (fixup-ftp-string-for-host
				   (send file :string-for-host)
				   file))
		 (cond ((= c (tcp-application:sym ftp:PRELIM))
			(ftp-access-operation file unit :dataconn
					      file pathname direction byte-size
					      raw-directory-list probe-stream))
		       ((and (= code 530.)
			     (progn (send unit :login unit t host)
				    ;; some hosts forget about the PORT
				    ;; command after a USER command is
				    ;; given, so give it again.
				    (ftp-access-operation file unit :initconn direction)
				    (= (tcp-application:sym ftp:PRELIM)
				       (send unit :command command
						    (send file :string-for-host)))))
			(ftp-access-operation file unit :dataconn
					      file pathname direction byte-size
					      raw-directory-list probe-stream))
		       ('else
			(send unit :ftp-error "file access command" file))))))))))

))

; From modified file DJ: L.NETWORK.IP-TCP.USER; FTP-ACCESS.LISP#23 at 20-Oct-87 18:20:31
#10R FILE-SYSTEM#: 
(COMPILER-LET ((*PACKAGE* (PKG-FIND-PACKAGE "FILE-SYSTEM")))
  (COMPILER::PATCH-SOURCE-FILE "SYS: NETWORK; IP-TCP; USER; FTP-ACCESS  "

(defmethod (ftp-probe-stream :after :init) (&rest ignored)
  (when (ftp-directory-line-parserp host t)
    (cond ((string-search #\return raw-data)
	   (with-input-from-string (s raw-data)
	     (do ((dplist)
		  (new))
		 ((not (setq new (readline s nil)))
		  (setq si:property-list nil truename nil))
	       (when (car (setq dplist
				(ftp-parse-directory-list-line new host pathname)))
		 (return (setq si:property-list (cdr dplist)
			       truename (getf (cdr dplist) :truename)))))))
	  ('else
	   (let ((dplist (ftp-parse-directory-list-line raw-data host pathname)))
	     (setq si:property-list (cdr dplist))
	     (setq truename (getf (cdr dplist) :truename)))))))

))