Improve Tramp error handling

* lisp/net/tramp.el (tramp-set-syntax): Add missing argument.
(tramp-signal-hook-function): Make it more robust.
(tramp-handle-directory-files):
* lisp/net/tramp-adb.el
(tramp-adb-handle-directory-files-and-attributes)
(tramp-adb-handle-copy-file, tramp-adb-handle-rename-file):
* lisp/net/tramp-gvfs.el (tramp-gvfs-do-copy-or-rename-file):
* lisp/net/tramp-rclone.el (tramp-rclone-do-copy-or-rename-file)
(tramp-rclone-handle-directory-files):
* lisp/net/tramp-sh.el (tramp-sh-handle-directory-files-and-attributes)
(tramp-sh-handle-copy-directory, tramp-do-copy-or-rename-file):
* lisp/net/tramp-smb.el (tramp-smb-handle-copy-directory)
(tramp-smb-handle-copy-file, tramp-smb-handle-directory-files)
(tramp-smb-handle-rename-file):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-do-copy-or-rename-file):
Improve error handling.

* test/lisp/net/tramp-tests.el (tramp-test11-copy-file)
(tramp-test12-rename-file, tramp-test14-delete-directory)
(tramp-test15-copy-directory, tramp-test16-directory-files)
(tramp-test19-directory-files-and-attributes): Extend tests.

1 files changed, 4 insertions, 0 deletions

diff --git a/lisp/net/tramp-sudoedit.el b/lisp/net/tramp-sudoedit.el
index bfc9b3bdc3a..2d9d7ff7892 100644
--- a/lisp/net/tramp-sudoedit.el
+++ b/lisp/net/tramp-sudoedit.el
@@ -241,6 +241,10 @@ absolute file names."
           (msg-operation (if (eq op 'copy) "Copying" "Renaming")))
 
       (with-parsed-tramp-file-name (if t1 filename newname) nil
+        (unless (file-exists-p filename)
+          (tramp-error
+           v tramp-file-missing
+           "%s file" msg-operation "No such file or directory" filename))
         (when (and (not ok-if-already-exists) (file-exists-p newname))
           (tramp-error v 'file-already-exists newname))
         (when (and (file-directory-p newname)