tramp-sh.el: Work around a stat bug (backport from master)

* lisp/net/tramp-sh.el (tramp-get-remote-stat): Do not use
stat versions which produce shell quoted output.  See also
coreutils Bug#23422.

(cherry picked from commit 6aad36ace9953b9672b13be68416d205532d5e59)

diff --git a/lisp/net/tramp-sh.el b/lisp/net/tramp-sh.el
index 4d529f7aa323c811c6fbe8d088878d9513563c5c..bff6ec31156eb9387deeb26e683ce45322dddccc 100644 (file)
--- a/lisp/net/tramp-sh.el
+++ b/lisp/net/tramp-sh.el
@@ -5522,13 +5522,15 @@ Return ATTR."
                   vec "stat" (tramp-get-remote-path vec)))
          tmp)
       ;; Check whether stat(1) returns usable syntax.  "%s" does not
-      ;; work on older AIX systems.
+      ;; work on older AIX systems.  Recent GNU stat versions (8.24?)
+      ;; use shell quoted format for "%N", we check the boundaries "`"
+      ;; and "'", therefore.  See Bug#23422 in coreutils.
       (when result
        (setq tmp
              (tramp-send-command-and-read
               vec (format "%s -c '(\"%%N\" %%s)' /" result) 'noerror))
        (unless (and (listp tmp) (stringp (car tmp))
-                    (string-match "^./.$" (car tmp))
+                    (string-match "^`/'$" (car tmp))
                     (integerp (cadr tmp)))
          (setq result nil)))
       result)))