Rework fixing Bug#24432

* lisp/net/tramp.el (tramp-get-buffer): Set connection property
"process-buffer" in order to mark connection as active.

* lisp/net/tramp-cache.el (tramp-get-hash-table)
(tramp-set-connection-property)
(tramp-dump-connection-properties): Do not use "active" property.
(tramp-list-connections): Use "process-buffer" property.

* lisp/net/tramp-cmds.el (tramp-cleanup-connection): Flush process
properties prior deletion of process.

lisp/net/tramp-cache.el

@@ -99,8 +99,7 @@ matching entries of `tramp-connection-properties'."
 		   (or (nth 0 elt) "")
 		   (tramp-make-tramp-file-name
 		    (aref key 0) (aref key 1) (aref key 2) nil))
-	      (tramp-set-connection-property key (nth 1 elt) (nth 2 elt))))
-	  (tramp-set-connection-property key "active" 'undef))
+	      (tramp-set-connection-property key (nth 1 elt) (nth 2 elt)))))
 	hash)))
 
 ;;;###tramp-autoload
@@ -263,7 +262,6 @@ KEY is a vector."
     (aset key 3 nil)
     (aset key 4 nil))
   (let ((hash (tramp-get-hash-table key)))
-    (puthash "active" t hash)
     (puthash property value hash)
     (setq tramp-cache-data-changed t)
     (tramp-message key 7 "%s %s" property value)
@@ -333,11 +331,11 @@ properties of the local machine."
 ;;;###tramp-autoload
 (defun tramp-list-connections ()
   "Return a list of all known connection vectors according to `tramp-cache'."
-    (let (result)
+    (let (result tramp-verbose)
       (maphash
        (lambda (key _value)
 	 (when (and (vectorp key) (null (aref key 3))
-		    (tramp-connection-property-p key "active"))
+		    (tramp-connection-property-p key "process-buffer"))
 	   (add-to-list 'result key)))
        tramp-cache-data)
       result))
@@ -362,7 +360,6 @@ properties of the local machine."
 		    (not (tramp-file-name-localname key))
 		    (not (gethash "login-as" value)))
 	       (progn
-		 (remhash "active" value)
 		 (remhash "process-name" value)
 		 (remhash "process-buffer" value)
 		 (remhash "first-password-request" value))
@@ -430,8 +427,7 @@ for all methods.  Resulting data are derived from connection history."
 	      ;; `tramp-connection-properties'.  The cache is
 	      ;; initialized properly by side effect.
 	      (unless (tramp-connection-property-p key (car item))
-		(tramp-set-connection-property key (pop item) (car item))))
-	    (tramp-set-connection-property key "active" 'undef)))
+		(tramp-set-connection-property key (pop item) (car item))))))
 	(setq tramp-cache-data-changed nil))
     (file-error
      ;; Most likely because the file doesn't exist yet.  No message.

lisp/net/tramp-cmds.el

@@ -101,8 +101,8 @@ When called interactively, a Tramp connection has to be selected."
 
     ;; Flush connection cache.
     (when (processp (tramp-get-connection-process vec))
-      (delete-process (tramp-get-connection-process vec))
-      (tramp-flush-connection-property (tramp-get-connection-process vec)))
+      (tramp-flush-connection-property (tramp-get-connection-process vec))
+      (delete-process (tramp-get-connection-process vec)))
     (tramp-flush-connection-property vec)
 
     ;; Remove buffers.
@@ -384,10 +384,12 @@ please ensure that the buffers are attached to your email.\n\n"))
 ;;; TODO:
 
 ;; * Clean up unused *tramp/foo* buffers after a while.  (Pete Forman)
+;;
 ;; * WIBNI there was an interactive command prompting for Tramp
 ;;   method, hostname, username and filename and translates the user
 ;;   input into the correct filename syntax (depending on the Emacs
 ;;   flavor)  (Reiner Steib)
+;;
 ;; * Let the user edit the connection properties interactively.
 ;;   Something like `gnus-server-edit-server' in Gnus' *Server* buffer.
 

lisp/net/tramp.el

@@ -1314,6 +1314,7 @@ necessary only.  This function will be used in file name completion."
   "Get the connection buffer to be used for VEC."
   (or (get-buffer (tramp-buffer-name vec))
       (with-current-buffer (get-buffer-create (tramp-buffer-name vec))
+	(tramp-set-connection-property vec "process-buffer" nil)
 	(setq buffer-undo-list t)
 	(setq default-directory
 	      (tramp-make-tramp-file-name
@@ -4306,30 +4307,40 @@ Only works for Bourne-like shells."
 
 ;; * In Emacs 21, `insert-directory' shows total number of bytes used
 ;;   by the files in that directory.  Add this here.
+;;
 ;; * Avoid screen blanking when hitting `g' in dired.  (Eli Tziperman)
+;;
 ;; * Better error checking.  At least whenever we see something
 ;;   strange when doing zerop, we should kill the process and start
 ;;   again.  (Greg Stark)
-;; * Username and hostname completion.
-;; ** Try to avoid usage of `last-input-event' in `tramp-completion-mode-p'.
-;; * Make `tramp-default-user' obsolete.
+;;
 ;; * Implement a general server-local-variable mechanism, as there are
 ;;   probably other variables that need different values for different
 ;;   servers too.  The user could then configure a variable (such as
 ;;   tramp-server-local-variable-alist) to define any such variables
 ;;   that they need to, which would then be let bound as appropriate
 ;;   in tramp functions.  (Jason Rumney)
+;;
 ;; * Make shadowfile.el grok Tramp filenames.  (Bug#4526, Bug#4846)
+;;
 ;; * I was wondering if it would be possible to use tramp even if I'm
 ;;   actually using sshfs.  But when I launch a command I would like
 ;;   to get it executed on the remote machine where the files really
 ;;   are.  (Andrea Crotti)
+;;
 ;; * Run emerge on two remote files.  Bug is described here:
 ;;   <http://www.mail-archive.com/tramp-devel@nongnu.org/msg01041.html>.
 ;;   (Bug#6850)
+;;
 ;; * Use also port to distinguish connections.  This is needed for
 ;;   different hosts sitting behind a single router (distinguished by
 ;;   different port numbers).  (Tzvi Edelman)
+;;
+;; * Refactor code from different handlers.  Start with
+;;   *-process-file.  One idea is to generalize `tramp-send-command'
+;;   and friends, for most of the handlers this is the major
+;;   difference between the different backends.  Other handlers but
+;;   *-process-file would profit from this as well.
 
 ;;; tramp.el ends here