Support old Samba versions in Tramp

* doc/misc/tramp.texi (Relevant connection properties to override):
New subsection.

* lisp/net/tramp-smb.el (tramp-smb-get-cifs-capabilities): Check "posix"
connection property.

* lisp/net/tramp.el (with-tramp-progress-reporter): Fix docstring.

2 files changed, 8 insertions, 3 deletions

diff --git a/lisp/net/tramp-smb.el b/lisp/net/tramp-smb.el
index b008e6b25eb..2a9cf6a6d75 100644
--- a/lisp/net/tramp-smb.el
+++ b/lisp/net/tramp-smb.el
@@ -1814,8 +1814,13 @@ Result is the list (LOCALNAME MODE SIZE MTIME)."
 
 (defun tramp-smb-get-cifs-capabilities (vec)
   "Check, whether the SMB server supports POSIX commands."
-  ;; When we are not logged in yet, we return nil.
-  (if (process-live-p (tramp-get-connection-process vec))
+  ;; When we are not logged in yet, we return nil.  The
+  ;; connection-local property "posix" is not set explicitly; it is
+  ;; just checked in order to let a user configure it to nil on hosts
+  ;; which return cifs properties, but lack a proper implementation.
+  ;; Very old Samba implementations, for example.
+  (if (and (process-live-p (tramp-get-connection-process vec))
+	   (tramp-get-connection-property vec "posix" t))
       (with-tramp-connection-property
 	  (tramp-get-connection-process vec) "cifs-capabilities"
 	(save-match-data
diff --git a/lisp/net/tramp.el b/lisp/net/tramp.el
index 84a6febf240..6ff313e8fb3 100644
--- a/lisp/net/tramp.el
+++ b/lisp/net/tramp.el
@@ -1922,7 +1922,7 @@ If VAR is nil, then we bind `v' to the structure and `method', `user',
       (tramp-compat-progress-reporter-update reporter value suffix))))
 
 (defmacro with-tramp-progress-reporter (vec level message &rest body)
-  "Executes BODY, spinning a progress reporter with MESSAGE.
+  "Execute BODY, spinning a progress reporter with MESSAGE.
 If LEVEL does not fit for visible messages, there are only traces
 without a visible progress reporter."
   (declare (indent 3) (debug t))