Fix Bug#22452

* lisp/net/tramp-adb.el (tramp-adb-maybe-open-connection):
* lisp/net/tramp-gvfs.el (tramp-gvfs-maybe-open-connection):
* lisp/net/tramp-sh.el (tramp-maybe-open-connection):
* lisp/net/tramp-smb.el (tramp-smb-maybe-open-connection):
Mark it as connected.

* lisp/net/tramp.el (tramp-handle-file-remote-p): Check also, if
connection property "connected" is set.  (Bug#22452)

5 files changed, 19 insertions, 5 deletions

diff --git a/lisp/net/tramp-adb.el b/lisp/net/tramp-adb.el
index dbd13183a92..32fd1888d36 100644
--- a/lisp/net/tramp-adb.el
+++ b/lisp/net/tramp-adb.el
@@ -1250,7 +1250,10 @@ connection if a previous connection has died for some reason."
                 ;; Read the expression.
                 (goto-char (point-min))
                 (read (current-buffer)))
-              ":" 'omit-nulls))))))))
+              ":" 'omit-nulls))
+
+            ;; Mark it as connected.
+            (tramp-set-connection-property p "connected" t)))))))
 
 (add-hook 'tramp-unload-hook
           (lambda ()
diff --git a/lisp/net/tramp-gvfs.el b/lisp/net/tramp-gvfs.el
index e19ceae89da..dee8333e547 100644
--- a/lisp/net/tramp-gvfs.el
+++ b/lisp/net/tramp-gvfs.el
@@ -1617,7 +1617,11 @@ connection if a previous connection has died for some reason."
         ;; is marked with the fuse-mountpoint "/".  We shall react.
         (when (string-equal
                (tramp-get-file-property vec "/" "fuse-mountpoint" "") "/")
-          (tramp-error vec 'file-error "FUSE mount denied")))))
+          (tramp-error vec 'file-error "FUSE mount denied"))
+
+        ;; Mark it as connected.
+        (tramp-set-connection-property
+         (tramp-get-connection-process vec) "connected" t))))
 
   ;; In `tramp-check-cached-permissions', the connection properties
   ;; {uig,gid}-{integer,string} are used.  We set them to their local
diff --git a/lisp/net/tramp-sh.el b/lisp/net/tramp-sh.el
index 7ace8864f88..1f43747c094 100644
--- a/lisp/net/tramp-sh.el
+++ b/lisp/net/tramp-sh.el
@@ -5040,7 +5040,10 @@ connection if a previous connection has died for some reason."
                         target-alist (cdr target-alist)))
 
                 ;; Make initial shell settings.
-                (tramp-open-connection-setup-interactive-shell p vec)))))
+                (tramp-open-connection-setup-interactive-shell p vec)
+
+                ;; Mark it as connected.
+                (tramp-set-connection-property p "connected" t)))))
 
       ;; When the user did interrupt, we must cleanup.
       (quit
diff --git a/lisp/net/tramp-smb.el b/lisp/net/tramp-smb.el
index e957fdfd612..509e2e388b8 100644
--- a/lisp/net/tramp-smb.el
+++ b/lisp/net/tramp-smb.el
@@ -1914,7 +1914,10 @@ If ARGUMENT is non-nil, use it as argument for
                     ;; character by character; if we send the string
                     ;; at once, it is read painfully slow.
                     (tramp-set-connection-property p "smb-share" share)
-                    (tramp-set-connection-property p "chunksize" 1))
+                    (tramp-set-connection-property p "chunksize" 1)
+
+                    ;; Mark it as connected.
+                    (tramp-set-connection-property p "connected" t))
 
                 ;; Check for the error reason.  If it was due to wrong
                 ;; password, reestablish the connection.  We cannot
diff --git a/lisp/net/tramp.el b/lisp/net/tramp.el
index e8e40ae23dc..43962169d5a 100644
--- a/lisp/net/tramp.el
+++ b/lisp/net/tramp.el
@@ -3009,7 +3009,8 @@ User is always nil."
     (when (tramp-tramp-file-p filename)
       (let* ((v (tramp-dissect-file-name filename))
              (p (tramp-get-connection-process v))
-             (c (and p (processp p) (memq (process-status p) '(run open)))))
+             (c (and p (processp p) (memq (process-status p) '(run open))
+                     (tramp-get-connection-property p "connected" nil))))
         ;; We expand the file name only, if there is already a connection.
         (with-parsed-tramp-file-name
             (if c (expand-file-name filename) filename) nil