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feature/android 7ce7a004f68: Merge remote-tracking branch 'origin/master


From: Po Lu
Subject: feature/android 7ce7a004f68: Merge remote-tracking branch 'origin/master' into feature/android
Date: Sat, 29 Jul 2023 20:16:10 -0400 (EDT)

branch: feature/android
commit 7ce7a004f68753beafb12830e28c459c4b5b6273
Merge: 9c5e9bb9be6 4038f1b40d3
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Merge remote-tracking branch 'origin/master' into feature/android
---
 doc/misc/tramp.texi          |  17 +-
 lisp/format.el               |  11 +-
 lisp/jsonrpc.el              |   4 +-
 lisp/net/tramp-adb.el        | 212 ++++++++--------
 lisp/net/tramp-cmds.el       |   4 +-
 lisp/net/tramp-compat.el     |   2 +-
 lisp/net/tramp-crypt.el      | 142 +++++------
 lisp/net/tramp-gvfs.el       | 260 ++++++++++----------
 lisp/net/tramp-message.el    | 572 +++++++++++++++++++++++++++++++++++++++++++
 lisp/net/tramp-rclone.el     | 102 ++++----
 lisp/net/tramp-sh.el         | 482 ++++++++++++++++++------------------
 lisp/net/tramp-smb.el        | 327 +++++++++++++------------
 lisp/net/tramp-sshfs.el      |  99 ++++----
 lisp/net/tramp-sudoedit.el   |  35 +--
 lisp/net/tramp.el            | 480 ++++--------------------------------
 lisp/net/trampver.el         |   2 +
 test/lisp/net/tramp-tests.el |  27 +-
 17 files changed, 1508 insertions(+), 1270 deletions(-)

diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index 1d8e0095328..e518330c9b0 100644
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -6054,6 +6054,7 @@ wrapping the timer function body as follows:
 @chapter How to Customize Traces
 @vindex tramp-verbose
 @vindex tramp-debug-to-file
+@vindex tramp-debug-command-messages
 
 @value{tramp} messages are raised with verbosity levels ranging from 0
 to 10.  @value{tramp} does not display all messages; only those with a
@@ -6075,9 +6076,10 @@ The verbosity levels are
 @*@indent @w{11}  call traces (maintainer only)
 
 With @code{tramp-verbose} greater than or equal to 4, messages are
-also written to a @value{tramp} debug buffer.  Such debug buffers are
-essential to bug and problem analyzes.  For @value{tramp} bug reports,
-set the @code{tramp-verbose} level to 6 (@pxref{Bug Reports}).
+also written to the @value{tramp} debug buffer @file{*debug
+tramp/foo*}.  Such debug buffers are essential to bug and problem
+analyzes.  For @value{tramp} bug reports, set the @code{tramp-verbose}
+level to 6 (@pxref{Bug Reports}).
 
 The debug buffer is in
 @ifinfo
@@ -6121,7 +6123,14 @@ directory}.  Use this option with care, because it could 
decrease the
 performance of @value{tramp} actions.
 
 If @code{tramp-verbose} is greater than or equal to 11, @value{tramp}
-function call traces are written to the buffer @file{*trace-output*}.
+function call traces are written to the buffer @file{*trace tramp/foo*}.
+
+When @code{tramp-debug-command-messages} is non-@code{nil} and
+@code{tramp-verbose} is greater than or equal to 6, the debug buffer
+contains all messages with verbosity level 6 (sent and received
+strings), and the entry and exit messages for the function
+@code{tramp-file-name-handler}.  This is intended for @value{tramp}
+maintainers, analyzing the remote commands for performance analysis.
 
 
 @node GNU Free Documentation License
diff --git a/lisp/format.el b/lisp/format.el
index b2dba16659b..5c72a78f325 100644
--- a/lisp/format.el
+++ b/lisp/format.el
@@ -87,11 +87,16 @@
           rot13-region rot13-region t nil)
     (duden ,(purecopy "Duden Ersatzdarstellung")
           nil
-          ,(purecopy "diac") iso-iso2duden t nil)
+          ;; FROM-FN used to call the "diac" command which is not widely
+          ;; available and apparently not under a free software license:
+          ;; https://nm.wu-wien.ac.at/nm/download/file/diac4.tar.gz
+          ;; Reliable round-trip conversion is not possible anyway
+          ;; and would be by heuristic method, so use nil for now.
+          nil iso-iso2duden t nil)
     (de646 ,(purecopy "German ASCII (ISO 646)")
           nil
-          ,(purecopy "recode -f iso646-ge:latin1")
-          ,(purecopy "recode -f latin1:iso646-ge") t nil)
+          ,(purecopy "iconv -f iso646-de -t utf-8")
+          ,(purecopy "iconv -f utf-8 -t iso646-de") t nil)
     (denet ,(purecopy "net German")
           nil
           iso-german iso-cvt-read-only t nil)
diff --git a/lisp/jsonrpc.el b/lisp/jsonrpc.el
index ccf0f966574..52ffb220d8b 100644
--- a/lisp/jsonrpc.el
+++ b/lisp/jsonrpc.el
@@ -223,7 +223,7 @@ object, using the keywords `:code', `:message' and `:data'."
              (apply #'format-message (car args) (cdr args))))
         (signal 'jsonrpc-error
                 `(,msg
-                  (jsonrpc-error-code . ,32603)
+                  (jsonrpc-error-code . -32603)
                   (jsonrpc-error-message . ,msg))))
     (cl-destructuring-bind (&key code message data) args
       (signal 'jsonrpc-error
@@ -698,7 +698,7 @@ TIMEOUT is nil)."
                              :params params)
     (puthash id
              (list (or success-fn
-                       (jsonrpc-lambda (&rest _ignored)
+                       (lambda (&rest _ignored)
                          (jsonrpc--debug
                           connection (list :message "success ignored"
                                            :id id))))
diff --git a/lisp/net/tramp-adb.el b/lisp/net/tramp-adb.el
index 2b5369ea3b5..3d4dacb393c 100644
--- a/lisp/net/tramp-adb.el
+++ b/lisp/net/tramp-adb.el
@@ -209,8 +209,10 @@ It is used for TCP/IP devices."
 First arg specifies the OPERATION, second arg is a list of
 arguments to pass to the OPERATION."
   (if-let ((fn (assoc operation tramp-adb-file-name-handler-alist)))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (tramp--with-startup
@@ -273,7 +275,7 @@ arguments to pass to the OPERATION."
   (with-current-buffer (tramp-get-buffer vec)
     (goto-char (point-min))
     (let (file-properties)
-      (while (re-search-forward tramp-adb-ls-toolbox-regexp nil t)
+      (while (search-forward-regexp tramp-adb-ls-toolbox-regexp nil t)
        (let* ((mod-string (match-string 1))
               (is-dir (eq ?d (aref mod-string 0)))
               (is-symlink (eq ?l (aref mod-string 0)))
@@ -319,7 +321,7 @@ arguments to pass to the OPERATION."
                       (tramp-shell-quote-argument localname)))
        ;; We insert also filename/. and filename/.., because "ls"
        ;; doesn't on some file systems, like "sdcard".
-       (unless (re-search-backward (rx "." eol) nil t)
+       (unless (search-backward-regexp (rx "." eol) nil t)
          (narrow-to-region (point-max) (point-max))
          (tramp-adb-send-command
           v (format "%s -d -a -l %s %s | cat"
@@ -1142,7 +1144,7 @@ error and non-nil on success."
          ;; There must be a better solution by setting the correct coding
          ;; system, but this requires changes in core Tramp.
          (goto-char (point-min))
-         (while (re-search-forward (rx (+ "\r") eol) nil t)
+         (while (search-forward-regexp (rx (+ "\r") eol) nil t)
            (replace-match "" nil nil)))))))
 
 (defun tramp-adb-send-command-and-check (vec command &optional exit-status)
@@ -1186,12 +1188,12 @@ FMT and ARGS are passed to `error'."
          (let ((inhibit-read-only t))
            (goto-char (point-min))
            ;; ADB terminal sends "^H" sequences.
-           (when (re-search-forward (rx "<" (+ "\b")) (line-end-position) t)
+           (when (search-forward-regexp (rx "<" (+ "\b")) (line-end-position) 
t)
              (forward-line 1)
              (delete-region (point-min) (point)))
            ;; Delete the prompt.
             (goto-char (point-min))
-            (when (re-search-forward prompt (line-end-position) t)
+            (when (search-forward-regexp prompt (line-end-position) t)
               (forward-line 1)
               (delete-region (point-min) (point)))
            (when (tramp-search-regexp prompt)
@@ -1211,102 +1213,106 @@ connection if a previous connection has died for some 
reason."
   (unless (tramp-connectable-p vec)
     (throw 'non-essential 'non-essential))
 
-  (let* ((buf (tramp-get-connection-buffer vec))
-        (p (get-buffer-process buf))
-        (host (tramp-file-name-host vec))
-        (user (tramp-file-name-user vec))
-         (device (tramp-adb-get-device vec)))
-
-    ;; Maybe we know already that "su" is not supported.  We cannot
-    ;; use a connection property, because we have not checked yet
-    ;; whether it is still the same device.
-    (when (and user (not (tramp-get-file-property vec "/" "su-command-p" t)))
-      (tramp-error vec 'file-error "Cannot switch to user `%s'" user))
-
-    (unless (process-live-p p)
-      (save-match-data
-       (when (and p (processp p)) (delete-process p))
-       (if (tramp-string-empty-or-nil-p device)
-           (tramp-error vec 'file-error "Device %s not connected" host))
-       (with-tramp-progress-reporter vec 3 "Opening adb shell connection"
-         (let* ((coding-system-for-read 'utf-8-dos) ; Is this correct?
-                (process-connection-type tramp-process-connection-type)
-                (args (tramp-expand-args
-                       vec 'tramp-login-args ?d (or device "")))
-                (p (let ((default-directory
-                           tramp-compat-temporary-file-directory))
-                     (apply #'start-process (tramp-get-connection-name vec) buf
-                            tramp-adb-program args)))
-                (prompt (md5 (concat (prin1-to-string process-environment)
-                                     (current-time-string)))))
-           ;; Wait for initial prompt.  On some devices, it needs an
-           ;; initial RET, in order to get it.
-            (sleep-for 0.1)
-           (tramp-send-string vec tramp-rsh-end-of-line)
-           (tramp-adb-wait-for-output p 30)
-           (unless (process-live-p p)
-             (tramp-error vec 'file-error "Terminated!"))
-
-           ;; Set sentinel.  Initialize variables.
-           (set-process-sentinel p #'tramp-process-sentinel)
-           (tramp-post-process-creation p vec)
-
-           ;; Set connection-local variables.
-           (tramp-set-connection-local-variables vec)
-
-           ;; Change prompt.
-           (tramp-set-connection-property
-            p "prompt" (rx "///" (literal prompt) "#$"))
-           (tramp-adb-send-command
-            vec (format "PS1=\"///\"\"%s\"\"#$\"" prompt))
-
-           ;; Disable line editing.
-           (tramp-adb-send-command
-            vec "set +o vi +o vi-esccomplete +o vi-tabcomplete +o emacs")
-
-           ;; Dump option settings in the traces.
-           (when (>= tramp-verbose 9)
-             (tramp-adb-send-command vec "set -o"))
-
-           ;; Check whether the properties have been changed.  If
-           ;; yes, this is a strong indication that we must expire all
-           ;; connection properties.  We start again.
-           (tramp-message vec 5 "Checking system information")
-           (tramp-adb-send-command
-            vec
-            (concat
-             "echo \\\"`getprop ro.product.model` "
-             "`getprop ro.product.version` "
-             "`getprop ro.build.version.release`\\\""))
-           (let ((old-getprop (tramp-get-connection-property vec "getprop"))
-                 (new-getprop
-                  (tramp-set-connection-property
-                   vec "getprop"
-                   (with-current-buffer (tramp-get-connection-buffer vec)
-                     ;; Read the expression.
-                     (goto-char (point-min))
-                     (read (current-buffer))))))
-             (when (and (stringp old-getprop)
-                        (not (string-equal old-getprop new-getprop)))
-               (tramp-message
-                vec 3
-                "Connection reset, because remote host changed from `%s' to 
`%s'"
-                old-getprop new-getprop)
-               (tramp-cleanup-connection vec t)
-               (tramp-adb-maybe-open-connection vec)))
-
-           ;; Change user if indicated.
-           (when user
-             (tramp-adb-send-command vec (format "su %s" user))
-             (unless (tramp-adb-send-command-and-check vec nil)
-               (delete-process p)
-               ;; Do not flush, we need the nil value.
-               (tramp-set-file-property vec "/" "su-command-p" nil)
-               (tramp-error
-                vec 'file-error "Cannot switch to user `%s'" user)))
-
-           ;; Mark it as connected.
-           (tramp-set-connection-property p "connected" t)))))))
+  (with-tramp-debug-message vec "Opening connection"
+    (let* ((buf (tramp-get-connection-buffer vec))
+          (p (get-buffer-process buf))
+          (host (tramp-file-name-host vec))
+          (user (tramp-file-name-user vec))
+           (device (tramp-adb-get-device vec)))
+
+      ;; Maybe we know already that "su" is not supported.  We cannot
+      ;; use a connection property, because we have not checked yet
+      ;; whether it is still the same device.
+      (when (and user (not (tramp-get-file-property vec "/" "su-command-p" t)))
+       (tramp-error vec 'file-error "Cannot switch to user `%s'" user))
+
+      (unless (process-live-p p)
+       (save-match-data
+         (when (and p (processp p)) (delete-process p))
+         (if (tramp-string-empty-or-nil-p device)
+             (tramp-error vec 'file-error "Device %s not connected" host))
+         (with-tramp-progress-reporter vec 3 "Opening adb shell connection"
+           (let* ((coding-system-for-read 'utf-8-dos) ; Is this correct?
+                  (process-connection-type tramp-process-connection-type)
+                  (args (tramp-expand-args
+                         vec 'tramp-login-args ?d (or device "")))
+                  (p (let ((default-directory
+                            tramp-compat-temporary-file-directory))
+                       (apply
+                        #'start-process (tramp-get-connection-name vec) buf
+                        tramp-adb-program args)))
+                  (prompt (md5 (concat (prin1-to-string process-environment)
+                                       (current-time-string)))))
+             ;; Wait for initial prompt.  On some devices, it needs
+             ;; an initial RET, in order to get it.
+              (sleep-for 0.1)
+             (tramp-send-string vec tramp-rsh-end-of-line)
+             (tramp-adb-wait-for-output p 30)
+             (unless (process-live-p p)
+               (tramp-error vec 'file-error "Terminated!"))
+
+             ;; Set sentinel.  Initialize variables.
+             (set-process-sentinel p #'tramp-process-sentinel)
+             (tramp-post-process-creation p vec)
+
+             ;; Set connection-local variables.
+             (tramp-set-connection-local-variables vec)
+
+             ;; Change prompt.
+             (tramp-set-connection-property
+              p "prompt" (rx "///" (literal prompt) "#$"))
+             (tramp-adb-send-command
+              vec (format "PS1=\"///\"\"%s\"\"#$\"" prompt))
+
+             ;; Disable line editing.
+             (tramp-adb-send-command
+              vec "set +o vi +o vi-esccomplete +o vi-tabcomplete +o emacs")
+
+             ;; Dump option settings in the traces.
+             (when (>= tramp-verbose 9)
+               (tramp-adb-send-command vec "set -o"))
+
+             ;; Check whether the properties have been changed.  If
+             ;; yes, this is a strong indication that we must expire
+             ;; all connection properties.  We start again.
+             (tramp-message vec 5 "Checking system information")
+             (tramp-adb-send-command
+              vec
+              (concat
+               "echo \\\"`getprop ro.product.model` "
+               "`getprop ro.product.version` "
+               "`getprop ro.build.version.release`\\\""))
+             (let ((old-getprop (tramp-get-connection-property vec "getprop"))
+                   (new-getprop
+                    (tramp-set-connection-property
+                     vec "getprop"
+                     (with-current-buffer (tramp-get-connection-buffer vec)
+                       ;; Read the expression.
+                       (goto-char (point-min))
+                       (read (current-buffer))))))
+               (when (and (stringp old-getprop)
+                          (not (string-equal old-getprop new-getprop)))
+                 (tramp-message
+                  vec 3
+                  (concat
+                   "Connection reset, because remote host changed "
+                   "from `%s' to `%s'")
+                  old-getprop new-getprop)
+                 (tramp-cleanup-connection vec t)
+                 (tramp-adb-maybe-open-connection vec)))
+
+             ;; Change user if indicated.
+             (when user
+               (tramp-adb-send-command vec (format "su %s" user))
+               (unless (tramp-adb-send-command-and-check vec nil)
+                 (delete-process p)
+                 ;; Do not flush, we need the nil value.
+                 (tramp-set-file-property vec "/" "su-command-p" nil)
+                 (tramp-error
+                  vec 'file-error "Cannot switch to user `%s'" user)))
+
+             ;; Mark it as connected.
+             (tramp-set-connection-property p "connected" t))))))))
 
 ;;; Default connection-local variables for Tramp.
 
diff --git a/lisp/net/tramp-cmds.el b/lisp/net/tramp-cmds.el
index 07f449a3a2e..3c9b9e984e6 100644
--- a/lisp/net/tramp-cmds.el
+++ b/lisp/net/tramp-cmds.el
@@ -738,7 +738,7 @@ buffer in your bug report.
 
   ;; Beautify encoded values.
   (goto-char (point-min))
-  (while (re-search-forward
+  (while (search-forward-regexp
          (rx "'" (group "(decode-coding-string")) nil 'noerror)
     (replace-match "\\1"))
   (goto-char (point-max))
@@ -766,7 +766,7 @@ buffer in your bug report.
        (setq buffer-read-only nil)
        (goto-char (point-min))
        (while (not (eobp))
-         (if (re-search-forward tramp-buf-regexp (line-end-position) t)
+         (if (search-forward-regexp tramp-buf-regexp (line-end-position) t)
              (forward-line 1)
            (forward-line 0)
            (let ((start (point)))
diff --git a/lisp/net/tramp-compat.el b/lisp/net/tramp-compat.el
index bb7b266dd35..61359562ee3 100644
--- a/lisp/net/tramp-compat.el
+++ b/lisp/net/tramp-compat.el
@@ -202,7 +202,7 @@ Add the extension of F, if existing."
        (let ((matches 0)
               (case-fold-search nil))
          (goto-char start)
-         (while (re-search-forward regexp end t)
+         (while (search-forward-regexp regexp end t)
             (replace-match replacement t)
             (setq matches (1+ matches)))
          (and (not (zerop matches))
diff --git a/lisp/net/tramp-crypt.el b/lisp/net/tramp-crypt.el
index 9d52966b817..c85f566c4d5 100644
--- a/lisp/net/tramp-crypt.el
+++ b/lisp/net/tramp-crypt.el
@@ -279,8 +279,10 @@ arguments to pass to the OPERATION."
            (apply #'tramp-crypt-file-name-for-operation operation args))
           (fn (and (tramp-crypt-file-name-p filename)
                    (assoc operation tramp-crypt-file-name-handler-alist))))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-crypt-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (progn (defun tramp-register-crypt-file-name-handler ()
@@ -312,73 +314,75 @@ connection if a previous connection has died for some 
reason."
   ;; For password handling, we need a process bound to the connection
   ;; buffer.  Therefore, we create a dummy process.  Maybe there is a
   ;; better solution?
-  (unless (get-buffer-process (tramp-get-connection-buffer vec))
-    (let ((p (make-network-process
-             :name (tramp-get-connection-name vec)
-             :buffer (tramp-get-connection-buffer vec)
-             :server t :host 'local :service t :noquery t)))
-      (tramp-post-process-creation p vec)))
-
-  ;; The following operations must be performed without
-  ;; `tramp-crypt-file-name-handler'.
-  (let* (tramp-crypt-enabled
-        ;; Don't check for a proper method.
-        (non-essential t)
-        (remote-config
-         (expand-file-name
-          tramp-crypt-encfs-config (tramp-crypt-get-remote-dir vec)))
-        (local-config (tramp-crypt-config-file-name vec)))
-    ;; There is no local encfs6 config file.
-    (unless (file-exists-p local-config)
-      (if (and tramp-crypt-save-encfs-config-remote
-              (file-exists-p remote-config))
-         ;; Copy remote encfs6 config file if possible.
-         (copy-file remote-config local-config 'ok 'keep)
-
-       ;; Create local encfs6 config file otherwise.
-       (let* ((default-directory tramp-compat-temporary-file-directory)
-              (tmpdir1 (file-name-as-directory
-                        (tramp-compat-make-temp-file " .crypt" 'dir-flag)))
-              (tmpdir2 (file-name-as-directory
-                        (tramp-compat-make-temp-file " .nocrypt" 'dir-flag))))
-         ;; Enable `auth-source', unless "emacs -Q" has been called.
-         (tramp-set-connection-property
-          vec "first-password-request" tramp-cache-read-persistent-data)
-         (with-temp-buffer
-           (insert
-            (tramp-read-passwd
-             (tramp-get-connection-process vec)
-             (format
-              "New EncFS Password for %s " (tramp-crypt-get-remote-dir vec))))
-           (when
-               (zerop
-                (tramp-call-process-region
-                 vec (point-min) (point-max)
-                 tramp-crypt-encfs-program nil (tramp-get-connection-buffer 
vec)
-                 nil tramp-crypt-encfs-option "--extpass=cat" tmpdir1 tmpdir2))
-             ;; Save the password.
-             (ignore-errors
-               (and (functionp tramp-password-save-function)
-                    (funcall tramp-password-save-function)))))
-
-         ;; Write local config file.  Suppress file name IV chaining mode.
-         (with-temp-file local-config
-           (insert-file-contents
-            (expand-file-name tramp-crypt-encfs-config tmpdir1))
-           (when (search-forward
-                  "<chainedNameIV>1</chainedNameIV>" nil 'noerror)
-             (replace-match "<chainedNameIV>0</chainedNameIV>")))
-
-         ;; Unmount encfs.  Delete temporary directories.
-         (tramp-call-process
-          vec tramp-crypt-encfs-program nil nil nil
-          "--unmount" tmpdir1 tmpdir2)
-         (delete-directory tmpdir1 'recursive)
-         (delete-directory tmpdir2)
-
-         ;; Copy local encfs6 config file to remote.
-         (when tramp-crypt-save-encfs-config-remote
-           (copy-file local-config remote-config 'ok 'keep)))))))
+  (with-tramp-debug-message vec "Opening connection"
+    (unless (get-buffer-process (tramp-get-connection-buffer vec))
+      (let ((p (make-network-process
+               :name (tramp-get-connection-name vec)
+               :buffer (tramp-get-connection-buffer vec)
+               :server t :host 'local :service t :noquery t)))
+       (tramp-post-process-creation p vec)))
+
+    ;; The following operations must be performed without
+    ;; `tramp-crypt-file-name-handler'.
+    (let* (tramp-crypt-enabled
+          ;; Don't check for a proper method.
+          (non-essential t)
+          (remote-config
+           (expand-file-name
+            tramp-crypt-encfs-config (tramp-crypt-get-remote-dir vec)))
+          (local-config (tramp-crypt-config-file-name vec)))
+      ;; There is no local encfs6 config file.
+      (unless (file-exists-p local-config)
+       (if (and tramp-crypt-save-encfs-config-remote
+                (file-exists-p remote-config))
+           ;; Copy remote encfs6 config file if possible.
+           (copy-file remote-config local-config 'ok 'keep)
+
+         ;; Create local encfs6 config file otherwise.
+         (let* ((default-directory tramp-compat-temporary-file-directory)
+                (tmpdir1 (file-name-as-directory
+                          (tramp-compat-make-temp-file " .crypt" 'dir-flag)))
+                (tmpdir2 (file-name-as-directory
+                          (tramp-compat-make-temp-file " .nocrypt" 
'dir-flag))))
+           ;; Enable `auth-source', unless "emacs -Q" has been called.
+           (tramp-set-connection-property
+            vec "first-password-request" tramp-cache-read-persistent-data)
+           (with-temp-buffer
+             (insert
+              (tramp-read-passwd
+               (tramp-get-connection-process vec)
+               (format
+                "New EncFS Password for %s " (tramp-crypt-get-remote-dir 
vec))))
+             (when
+                 (zerop
+                  (tramp-call-process-region
+                   vec (point-min) (point-max)
+                   tramp-crypt-encfs-program nil
+                   (tramp-get-connection-buffer vec) nil
+                   tramp-crypt-encfs-option "--extpass=cat" tmpdir1 tmpdir2))
+               ;; Save the password.
+               (ignore-errors
+                 (and (functionp tramp-password-save-function)
+                      (funcall tramp-password-save-function)))))
+
+           ;; Write local config file.  Suppress file name IV chaining mode.
+           (with-temp-file local-config
+             (insert-file-contents
+              (expand-file-name tramp-crypt-encfs-config tmpdir1))
+             (when (search-forward
+                    "<chainedNameIV>1</chainedNameIV>" nil 'noerror)
+               (replace-match "<chainedNameIV>0</chainedNameIV>")))
+
+           ;; Unmount encfs.  Delete temporary directories.
+           (tramp-call-process
+            vec tramp-crypt-encfs-program nil nil nil
+            "--unmount" tmpdir1 tmpdir2)
+           (delete-directory tmpdir1 'recursive)
+           (delete-directory tmpdir2)
+
+           ;; Copy local encfs6 config file to remote.
+           (when tramp-crypt-save-encfs-config-remote
+             (copy-file local-config remote-config 'ok 'keep))))))))
 
 (defun tramp-crypt-send-command (vec &rest args)
   "Send encfsctl command to connection VEC.
diff --git a/lisp/net/tramp-gvfs.el b/lisp/net/tramp-gvfs.el
index 27dbf324924..72cf4a6a4b3 100644
--- a/lisp/net/tramp-gvfs.el
+++ b/lisp/net/tramp-gvfs.el
@@ -895,8 +895,10 @@ arguments to pass to the OPERATION."
             (and (tramp-tramp-file-p filename)
                  (tramp-dissect-file-name filename)))
            (fn (assoc operation tramp-gvfs-file-name-handler-alist)))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (when (featurep 'dbusbind)
@@ -1308,7 +1310,7 @@ If FILE-SYSTEM is non-nil, return file system attributes."
        ;; Parse output.
        (with-current-buffer (tramp-get-connection-buffer v)
          (goto-char (point-min))
-         (while (re-search-forward
+         (while (search-forward-regexp
                  (if file-system
                      tramp-gvfs-file-system-attributes-regexp
                    tramp-gvfs-file-attributes-with-gvfs-info-regexp)
@@ -2182,137 +2184,139 @@ connection if a previous connection has died for some 
reason."
   (unless (tramp-connectable-p vec)
     (throw 'non-essential 'non-essential))
 
-  ;; Sanity check.
-  (let ((method (tramp-file-name-method vec)))
-    (unless (member
-            (or (assoc-default
-                 method '(("smb" . "smb-share")
-                          ("davs" . "dav")
-                          ("nextcloud" . "dav")
-                          ("afp". "afp-volume")
-                          ("gdrive" . "google-drive")))
-                method)
-            tramp-gvfs-mounttypes)
-      (tramp-error vec 'file-error "Method `%s' not supported by GVFS" 
method)))
-
-  ;; For password handling, we need a process bound to the connection
-  ;; buffer.  Therefore, we create a dummy process.  Maybe there is a
-  ;; better solution?
-  (unless (get-buffer-process (tramp-get-connection-buffer vec))
-    (let ((p (make-network-process
-             :name (tramp-get-connection-name vec)
-             :buffer (tramp-get-connection-buffer vec)
-             :server t :host 'local :service t :noquery t)))
-      (tramp-post-process-creation p vec)
-
-      ;; Set connection-local variables.
-      (tramp-set-connection-local-variables vec)))
-
-  (unless (tramp-gvfs-connection-mounted-p vec)
-    (let ((method (tramp-file-name-method vec))
-         (user (tramp-file-name-user vec))
-         (host (tramp-file-name-host vec))
-         (localname (tramp-file-name-unquote-localname vec))
-         (object-path
-          (tramp-gvfs-object-path (tramp-make-tramp-file-name vec 'noloc))))
-
-      (when (and (string-equal method "afp")
-                (string-equal localname "/"))
-       (tramp-user-error vec "Filename must contain an AFP volume"))
-
-      (when (and (string-match-p (rx "dav" (? "s")) method)
-                (string-equal localname "/"))
-       (tramp-user-error vec "Filename must contain a WebDAV share"))
-
-      (when (and (string-equal method "smb")
-                (string-equal localname "/"))
-       (tramp-user-error vec "Filename must contain a Windows share"))
-
-      (when (member method tramp-goa-methods)
-       ;; Ensure that GNOME Online Accounts are cached.
-       (tramp-get-goa-accounts vec)
-       (when (tramp-get-connection-property
-              (tramp-get-goa-account vec) "FilesDisabled" t)
-         (tramp-user-error
-          vec "There is no Online Account `%s'"
-          (tramp-make-tramp-file-name vec 'noloc))))
-
-      (with-tramp-progress-reporter
-         vec 3
-         (if (tramp-string-empty-or-nil-p user)
-             (format "Opening connection for %s using %s" host method)
-           (format "Opening connection for %s@%s using %s" user host method))
-
-       ;; Enable `auth-source'.
-       (tramp-set-connection-property
-        vec "first-password-request" tramp-cache-read-persistent-data)
-
-       ;; There will be a callback of "askPassword" when a password is needed.
-       (dbus-register-method
-        :session dbus-service-emacs object-path
-        tramp-gvfs-interface-mountoperation "askPassword"
-        #'tramp-gvfs-handler-askpassword)
-       (dbus-register-method
-        :session dbus-service-emacs object-path
-        tramp-gvfs-interface-mountoperation "AskPassword"
-        #'tramp-gvfs-handler-askpassword)
-
-       ;; There could be a callback of "askQuestion" when adding
-       ;; fingerprints or checking certificates.
-       (dbus-register-method
-        :session dbus-service-emacs object-path
-        tramp-gvfs-interface-mountoperation "askQuestion"
-        #'tramp-gvfs-handler-askquestion)
-       (dbus-register-method
-        :session dbus-service-emacs object-path
-        tramp-gvfs-interface-mountoperation "AskQuestion"
-        #'tramp-gvfs-handler-askquestion)
-
-       ;; The call must be asynchronously, because of the "askPassword"
-       ;; or "askQuestion" callbacks.
-       (if (string-match-p (rx "(so)" eol) tramp-gvfs-mountlocation-signature)
+  (with-tramp-debug-message vec "Opening connection"
+    ;; Sanity check.
+    (let ((method (tramp-file-name-method vec)))
+      (unless (member
+              (or (assoc-default
+                   method '(("smb" . "smb-share")
+                            ("davs" . "dav")
+                            ("nextcloud" . "dav")
+                            ("afp". "afp-volume")
+                            ("gdrive" . "google-drive")))
+                  method)
+              tramp-gvfs-mounttypes)
+       (tramp-error
+        vec 'file-error "Method `%s' not supported by GVFS" method)))
+
+    ;; For password handling, we need a process bound to the
+    ;; connection buffer.  Therefore, we create a dummy process.
+    ;; Maybe there is a better solution?
+    (unless (get-buffer-process (tramp-get-connection-buffer vec))
+      (let ((p (make-network-process
+               :name (tramp-get-connection-name vec)
+               :buffer (tramp-get-connection-buffer vec)
+               :server t :host 'local :service t :noquery t)))
+       (tramp-post-process-creation p vec)
+
+       ;; Set connection-local variables.
+       (tramp-set-connection-local-variables vec)))
+
+    (unless (tramp-gvfs-connection-mounted-p vec)
+      (let ((method (tramp-file-name-method vec))
+           (user (tramp-file-name-user vec))
+           (host (tramp-file-name-host vec))
+           (localname (tramp-file-name-unquote-localname vec))
+           (object-path
+            (tramp-gvfs-object-path (tramp-make-tramp-file-name vec 'noloc))))
+
+       (when (and (string-equal method "afp")
+                  (string-equal localname "/"))
+         (tramp-user-error vec "Filename must contain an AFP volume"))
+
+       (when (and (string-match-p (rx "dav" (? "s")) method)
+                  (string-equal localname "/"))
+         (tramp-user-error vec "Filename must contain a WebDAV share"))
+
+       (when (and (string-equal method "smb")
+                  (string-equal localname "/"))
+         (tramp-user-error vec "Filename must contain a Windows share"))
+
+       (when (member method tramp-goa-methods)
+         ;; Ensure that GNOME Online Accounts are cached.
+         (tramp-get-goa-accounts vec)
+         (when (tramp-get-connection-property
+                (tramp-get-goa-account vec) "FilesDisabled" t)
+           (tramp-user-error
+            vec "There is no Online Account `%s'"
+            (tramp-make-tramp-file-name vec 'noloc))))
+
+       (with-tramp-progress-reporter
+           vec 3
+           (if (tramp-string-empty-or-nil-p user)
+               (format "Opening connection for %s using %s" host method)
+             (format "Opening connection for %s@%s using %s" user host method))
+
+         ;; Enable `auth-source'.
+         (tramp-set-connection-property
+          vec "first-password-request" tramp-cache-read-persistent-data)
+
+         ;; There will be a callback of "askPassword" when a password is 
needed.
+         (dbus-register-method
+          :session dbus-service-emacs object-path
+          tramp-gvfs-interface-mountoperation "askPassword"
+          #'tramp-gvfs-handler-askpassword)
+         (dbus-register-method
+          :session dbus-service-emacs object-path
+          tramp-gvfs-interface-mountoperation "AskPassword"
+          #'tramp-gvfs-handler-askpassword)
+
+         ;; There could be a callback of "askQuestion" when adding
+         ;; fingerprints or checking certificates.
+         (dbus-register-method
+          :session dbus-service-emacs object-path
+          tramp-gvfs-interface-mountoperation "askQuestion"
+          #'tramp-gvfs-handler-askquestion)
+         (dbus-register-method
+          :session dbus-service-emacs object-path
+          tramp-gvfs-interface-mountoperation "AskQuestion"
+          #'tramp-gvfs-handler-askquestion)
+
+         ;; The call must be asynchronously, because of the
+         ;; "askPassword" or "askQuestion" callbacks.
+         (if (string-match-p (rx "(so)" eol) 
tramp-gvfs-mountlocation-signature)
+             (with-tramp-dbus-call-method vec nil
+               :session tramp-gvfs-service-daemon tramp-gvfs-path-mounttracker
+               tramp-gvfs-interface-mounttracker tramp-gvfs-mountlocation
+               (tramp-gvfs-mount-spec vec)
+               `(:struct :string ,(dbus-get-unique-name :session)
+                         :object-path ,object-path))
            (with-tramp-dbus-call-method vec nil
              :session tramp-gvfs-service-daemon tramp-gvfs-path-mounttracker
              tramp-gvfs-interface-mounttracker tramp-gvfs-mountlocation
              (tramp-gvfs-mount-spec vec)
-             `(:struct :string ,(dbus-get-unique-name :session)
-                       :object-path ,object-path))
-         (with-tramp-dbus-call-method vec nil
-           :session tramp-gvfs-service-daemon tramp-gvfs-path-mounttracker
-           tramp-gvfs-interface-mounttracker tramp-gvfs-mountlocation
-           (tramp-gvfs-mount-spec vec)
-           :string (dbus-get-unique-name :session) :object-path object-path))
-
-       ;; We must wait, until the mount is applied.  This will be
-       ;; indicated by the "mounted" signal, i.e. the "fuse-mountpoint"
-       ;; file property.
-       (with-timeout
-           ((or (tramp-get-method-parameter vec 'tramp-connection-timeout)
-                tramp-connection-timeout)
-            (if (tramp-string-empty-or-nil-p (tramp-file-name-user vec))
+             :string (dbus-get-unique-name :session) :object-path object-path))
+
+         ;; We must wait, until the mount is applied.  This will be
+         ;; indicated by the "mounted" signal, i.e. the
+         ;; "fuse-mountpoint" file property.
+         (with-timeout
+             ((or (tramp-get-method-parameter vec 'tramp-connection-timeout)
+                  tramp-connection-timeout)
+              (if (tramp-string-empty-or-nil-p (tramp-file-name-user vec))
+                  (tramp-error
+                   vec 'file-error
+                   "Timeout reached mounting %s using %s" host method)
                 (tramp-error
                  vec 'file-error
-                 "Timeout reached mounting %s using %s" host method)
-              (tramp-error
-               vec 'file-error
-               "Timeout reached mounting %s@%s using %s" user host method)))
-         (while (not (tramp-get-file-property vec "/" "fuse-mountpoint"))
-           (read-event nil nil 0.1)))
-
-       ;; If `tramp-gvfs-handler-askquestion' has returned "No", it
-       ;; 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"))
-
-       ;; Save the password.
-       (ignore-errors
-         (and (functionp tramp-password-save-function)
-              (funcall tramp-password-save-function)))
-
-       ;; Mark it as connected.
-       (tramp-set-connection-property
-        (tramp-get-connection-process vec) "connected" t)))))
+                 "Timeout reached mounting %s@%s using %s" user host method)))
+           (while (not (tramp-get-file-property vec "/" "fuse-mountpoint"))
+             (read-event nil nil 0.1)))
+
+         ;; If `tramp-gvfs-handler-askquestion' has returned "No", it
+         ;; 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"))
+
+         ;; Save the password.
+         (ignore-errors
+           (and (functionp tramp-password-save-function)
+                (funcall tramp-password-save-function)))
+
+         ;; Mark it as connected.
+         (tramp-set-connection-property
+          (tramp-get-connection-process vec) "connected" t))))))
 
 (defun tramp-gvfs-gio-tool-p (vec)
   "Check, whether the gio tool is available."
diff --git a/lisp/net/tramp-message.el b/lisp/net/tramp-message.el
new file mode 100644
index 00000000000..bfefd95096d
--- /dev/null
+++ b/lisp/net/tramp-message.el
@@ -0,0 +1,572 @@
+;;; tramp-message.el --- Tramp messages  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2023 Free Software Foundation, Inc.
+
+;; Author: Michael Albinus <michael.albinus@gmx.de>
+;; Keywords: comm, processes
+;; Package: tramp
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This package collects all Tramp functions to trace.  This is driven
+;; by the user option `tramp-verbose'.  The following buffers are
+;; created:
+;;
+;; - *debug tramp/method user@host*
+;;
+;;   This buffer is created when `tramp-verbose' is greater than or
+;;   equal 4.  It contains all messages with a level up to `tramp-verbose'.
+;;
+;;   When `tramp-debug-command-messages' is non-nil and
+;;   `tramp-verbose' is greater than or equal 6, the buffer contains
+;;   all messages with level 6 and the entry/exit messages of
+;;   `tramp-file-name-handler'.  This is intended to analyze which
+;;   remote commands are sent for a given file name operation.
+;;
+;; - *trace tramp/method user@host*
+;;
+;;   This buffer is created by the trace.el package when
+;;   `tramp-verbose' is is greater than or equal 11.  It traces all
+;;   functions with suffix "tramp-" except those function with the
+;;   property `tramp-suppress-trace'.
+
+;;; Code:
+
+(require 'tramp-loaddefs)
+(require 'help-mode)
+
+(declare-function tramp-compat-string-replace "tramp-compat")
+(declare-function tramp-file-name-equal-p "tramp")
+(declare-function tramp-get-default-directory "tramp")
+(defvar tramp-compat-temporary-file-directory)
+
+;;;###tramp-autoload
+(defcustom tramp-verbose 3
+  "Verbosity level for Tramp messages.
+Any level x includes messages for all levels 1 .. x-1.  The levels are
+
+ 0  silent (no tramp messages at all)
+ 1  errors
+ 2  warnings
+ 3  connection to remote hosts (default level)
+ 4  activities
+ 5  internal
+ 6  sent and received strings
+ 7  connection properties
+ 8  file caching
+ 9  test commands
+10  traces (huge)
+11  call traces (maintainer only)."
+  :group 'tramp
+  :type 'integer)
+
+(defcustom tramp-debug-to-file nil
+  "Whether Tramp debug messages shall be saved to file.
+The debug file has the same name as the debug buffer, written to
+`tramp-compat-temporary-file-directory'."
+  :group 'tramp
+  :version "28.1"
+  :type 'boolean)
+
+(defcustom tramp-debug-command-messages nil
+  "Whether to write only command messages to the debug buffer.
+This has only effect if `tramp-verbose' is greater than or equal 6."
+  :group 'tramp
+  :version "30.1"
+  :type 'boolean)
+
+(defconst tramp-debug-outline-regexp
+  (rx ;; Timestamp.
+      (+ digit) ":" (+ digit) ":" (+ digit) "." (+ digit) blank
+      ;; Thread.
+      (? (group "#<thread " (+ nonl) ">") blank)
+      ;; Function name, verbosity.
+      (group (+ (any "-" alnum))) " (" (group (+ digit)) ") #")
+  "Used for highlighting Tramp debug buffers in `outline-mode'.
+When it is used for regexp matching, the regexp groups are
+
+  1 for the thread name (optional)
+  2 for the function name
+  3 for the verbosity level.")
+
+(defconst tramp-debug-font-lock-keywords
+  ;; FIXME: Make it a function instead of an ELisp expression, so you
+  ;; can evaluate it with `funcall' rather than `eval'!
+  ;; Also, in `font-lock-defaults' you can specify a function name for
+  ;; the "KEYWORDS" part, so font-lock calls it to get the actual keywords!
+  '(list
+    (rx bol (regexp tramp-debug-outline-regexp) (+ nonl))
+    '(1 font-lock-warning-face t t)
+    '(0 (outline-font-lock-face) keep t))
+  "Used for highlighting Tramp debug buffers in `outline-mode'.")
+
+(defun tramp-debug-outline-level ()
+  "Return the depth to which a statement is nested in the outline.
+Point must be at the beginning of a header line.
+
+The outline level is equal to the verbosity of the Tramp message."
+  (1+ (string-to-number (match-string 3))))
+
+(put #'tramp-debug-outline-level 'tramp-suppress-trace t)
+
+;; This function takes action since Emacs 28.1, when
+;; `read-extended-command-predicate' is set to
+;; `command-completion-default-include-p'.
+(defun tramp-debug-buffer-command-completion-p (_symbol buffer)
+  "A predicate for Tramp interactive commands.
+They are completed by \"M-x TAB\" only in Tramp debug buffers."
+  (with-current-buffer buffer
+    (string-equal
+     (buffer-substring (point-min) (min (+ (point-min) 10) (point-max)))
+     ";; Emacs:")))
+
+(put #'tramp-debug-buffer-command-completion-p 'tramp-suppress-trace t)
+
+(defun tramp-setup-debug-buffer ()
+  "Function to setup debug buffers."
+  ;; (declare (completion tramp-debug-buffer-command-completion-p))
+  (interactive)
+  (set-buffer-file-coding-system 'utf-8)
+  (setq buffer-undo-list t)
+  ;; Activate `outline-mode'.  This runs `text-mode-hook' and
+  ;; `outline-mode-hook'.  We must prevent that local processes die.
+  ;; Yes: I've seen `flyspell-mode', which starts "ispell".
+  ;; `(custom-declare-variable outline-minor-mode-prefix ...)'  raises
+  ;; on error in `(outline-mode)', we don't want to see it in the
+  ;; traces.
+  (let ((default-directory tramp-compat-temporary-file-directory))
+    (outline-mode))
+  (setq-local outline-level 'tramp-debug-outline-level)
+  (setq-local font-lock-keywords
+              ;; FIXME: This `(t FOO . BAR)' representation in
+              ;; `font-lock-keywords' is supposed to be an internal
+              ;; implementation "detail".  Don't abuse it here!
+              `(t (eval ,tramp-debug-font-lock-keywords t)
+                  ,(eval tramp-debug-font-lock-keywords t)))
+  ;; Do not edit the debug buffer.
+  (use-local-map special-mode-map)
+  (set-buffer-modified-p nil)
+  ;; For debugging purposes.
+  (local-set-key "\M-n" 'clone-buffer)
+  (add-hook 'clone-buffer-hook #'tramp-setup-debug-buffer nil 'local))
+
+(put #'tramp-setup-debug-buffer 'tramp-suppress-trace t)
+
+(function-put
+ #'tramp-setup-debug-buffer 'completion-predicate
+ #'tramp-debug-buffer-command-completion-p)
+
+(defun tramp-debug-buffer-name (vec)
+  "A name for the debug buffer of VEC."
+  (let ((method (tramp-file-name-method vec))
+       (user-domain (tramp-file-name-user-domain vec))
+       (host-port (tramp-file-name-host-port vec)))
+    (if (or (null user-domain) (string-empty-p user-domain))
+       (format "*debug tramp/%s %s*" method host-port)
+      (format "*debug tramp/%s %s@%s*" method user-domain host-port))))
+
+(put #'tramp-debug-buffer-name 'tramp-suppress-trace t)
+
+(defun tramp-get-debug-buffer (vec)
+  "Get the debug buffer of VEC."
+  (with-current-buffer (get-buffer-create (tramp-debug-buffer-name vec))
+    (when (bobp)
+      (tramp-setup-debug-buffer))
+    (current-buffer)))
+
+(put #'tramp-get-debug-buffer 'tramp-suppress-trace t)
+
+(defun tramp-get-debug-file-name (vec)
+  "Get the debug file name for VEC."
+  (expand-file-name
+   (tramp-compat-string-replace "/" " " (tramp-debug-buffer-name vec))
+   tramp-compat-temporary-file-directory))
+
+(put #'tramp-get-debug-file-name 'tramp-suppress-trace t)
+
+(defun tramp-trace-buffer-name (vec)
+  "A name for the trace buffer for VEC."
+   (tramp-compat-string-replace "*debug" "*trace" (tramp-debug-buffer-name 
vec)))
+
+(put #'tramp-trace-buffer-name 'tramp-suppress-trace t)
+
+(defvar tramp-trace-functions nil
+  "A list of non-Tramp functions to be traced with `tramp-verbose' > 10.")
+
+(defun tramp-debug-message (vec fmt-string &rest arguments)
+  "Append message to debug buffer of VEC.
+Message is formatted with FMT-STRING as control string and the remaining
+ARGUMENTS to actually emit the message (if applicable)."
+  (let ((inhibit-message t)
+       create-lockfiles file-name-handler-alist message-log-max
+       signal-hook-function)
+    (with-current-buffer (tramp-get-debug-buffer vec)
+      (goto-char (point-max))
+      (let ((point (point)))
+       (when (bobp)
+         ;; Headline.
+         (insert
+          (format
+           ";; Emacs: %s Tramp: %s -*- mode: outline; coding: utf-8; -*-"
+           emacs-version tramp-version))
+         (when (>= tramp-verbose 10)
+           (let ((tramp-verbose 0))
+             (insert
+              (format
+               "\n;; Location: %s Git: %s/%s"
+               (locate-library "tramp")
+               (or tramp-repository-branch "")
+               (or tramp-repository-version "")))))
+         ;; Traces.
+         (when (>= tramp-verbose 11)
+           (dolist
+               (elt
+                (append
+                 (mapcar
+                  #'intern (all-completions "tramp-" obarray #'functionp))
+                 tramp-trace-functions))
+             (unless (get elt 'tramp-suppress-trace)
+               (trace-function-background elt (tramp-trace-buffer-name vec)))))
+         ;; Delete debug file.
+         (when (and tramp-debug-to-file (tramp-get-debug-file-name vec))
+           (ignore-errors (delete-file (tramp-get-debug-file-name vec)))))
+       (unless (bolp)
+         (insert "\n"))
+       ;; Timestamp.
+       (insert (format-time-string "%T.%6N "))
+       ;; Threads.  `current-thread' might not exist when Emacs is
+       ;; configured --without-threads.
+       ;; (unless (eq (tramp-compat-funcall 'current-thread) main-thread)
+       ;;   (insert (format "%s " (tramp-compat-funcall 'current-thread))))
+       ;; Calling Tramp function.  We suppress compat and trace
+       ;; functions from being displayed.
+       (let ((frames (backtrace-frames))
+             btf fn)
+         (while (not fn)
+           (setq btf (cadadr frames))
+           (if (not btf)
+               (setq fn "")
+             (and (symbolp btf) (setq fn (symbol-name btf))
+                  (or (not (string-prefix-p "tramp" fn))
+                      (get btf 'tramp-suppress-trace))
+                  (setq fn nil))
+             (setq frames (cdr frames))))
+         ;; The following code inserts filename and line number.
+         ;; Should be inactive by default, because it is time consuming.
+         ;; (let ((ffn (find-function-noselect (intern fn))))
+         ;;   (insert
+         ;;    (format
+         ;;     "%s:%d: "
+         ;;     (file-name-nondirectory (buffer-file-name (car ffn)))
+         ;;     (with-current-buffer (car ffn)
+         ;;       (1+ (count-lines (point-min) (cdr ffn)))))))
+         (insert (format "%s " fn)))
+       ;; The message.
+       (insert (apply #'format-message fmt-string arguments))
+       (if tramp-debug-command-messages
+           ;; Add help function.
+           (tramp-debug-message-buttonize point)
+         ;; Write message to debug file.
+         (when tramp-debug-to-file
+           (ignore-errors
+             (write-region
+              point (point-max) (tramp-get-debug-file-name vec) 'append))))))))
+
+(put #'tramp-debug-message 'tramp-suppress-trace t)
+
+;;;###tramp-autoload
+(defun tramp-message (vec-or-proc level fmt-string &rest arguments)
+  "Emit a message depending on verbosity level.
+VEC-OR-PROC identifies the Tramp buffer to use.  It can be either a
+vector or a process.  LEVEL says to be quiet if `tramp-verbose' is
+less than LEVEL.  The message is emitted only if `tramp-verbose' is
+greater than or equal to LEVEL.
+
+The message is also logged into the debug buffer when `tramp-verbose'
+is greater than or equal 4.
+
+Calls functions `message' and `tramp-debug-message' with FMT-STRING as
+control string and the remaining ARGUMENTS to actually emit the message (if
+applicable)."
+  (ignore-errors
+    (when (<= level tramp-verbose)
+      ;; Display only when there is a minimum level, and the progress
+      ;; reporter doesn't suppress further messages.
+      (when (and (<= level 3) (null tramp-inhibit-progress-reporter))
+       (apply #'message
+              (concat
+               (cond
+                ((= level 0) "")
+                ((= level 1) "")
+                ((= level 2) "Warning: ")
+                (t           "Tramp: "))
+               fmt-string)
+              arguments))
+      ;; Log only when there is a minimum level.
+      (when (>= tramp-verbose 4)
+       (let ((tramp-verbose 0))
+         ;; Append connection buffer for error messages, if exists.
+         (when (= level 1)
+           (ignore-errors
+             (setq fmt-string (concat fmt-string "\n%s")
+                   arguments
+                   (append
+                    arguments
+                    `(,(tramp-get-buffer-string
+                        (if (processp vec-or-proc)
+                            (process-buffer vec-or-proc)
+                          (tramp-get-connection-buffer
+                           vec-or-proc 'dont-create))))))))
+         ;; Translate proc to vec.
+         (when (processp vec-or-proc)
+           (setq vec-or-proc (process-get vec-or-proc 'tramp-vector))))
+       ;; Do it.
+       (when (and (tramp-file-name-p vec-or-proc)
+                  (or (null tramp-debug-command-messages) (= level 6)))
+         (apply #'tramp-debug-message
+                vec-or-proc
+                (concat (format "(%d) # " level) fmt-string)
+                arguments))))))
+
+(defsubst tramp-backtrace (&optional vec-or-proc force)
+  "Dump a backtrace into the debug buffer.
+If VEC-OR-PROC is nil, the buffer *debug tramp* is used.  FORCE
+forces the backtrace even if `tramp-verbose' is less than 10.
+This function is meant for debugging purposes."
+  (let ((tramp-verbose (if force 10 tramp-verbose)))
+    (when (>= tramp-verbose 10)
+      (if vec-or-proc
+         (tramp-message
+          vec-or-proc 10 "\n%s" (with-output-to-string (backtrace)))
+       (with-output-to-temp-buffer "*debug tramp*" (backtrace))))))
+
+(defsubst tramp-error (vec-or-proc signal fmt-string &rest arguments)
+  "Emit an error.
+VEC-OR-PROC identifies the connection to use, SIGNAL is the
+signal identifier to be raised, remaining arguments passed to
+`tramp-message'.  Finally, signal SIGNAL is raised with
+FMT-STRING and ARGUMENTS."
+  (let (signal-hook-function)
+    (tramp-backtrace vec-or-proc)
+    (unless arguments
+      ;; FMT-STRING could be just a file name, as in
+      ;; `file-already-exists' errors.  It could contain the ?\%
+      ;; character, as in smb domain spec.
+      (setq arguments (list fmt-string)
+           fmt-string "%s"))
+    (when vec-or-proc
+      (tramp-message
+       vec-or-proc 1 "%s"
+       (error-message-string
+       (list signal
+             (get signal 'error-message)
+             (apply #'format-message fmt-string arguments)))))
+    (signal signal (list (substring-no-properties
+                         (apply #'format-message fmt-string arguments))))))
+
+(defvar tramp-error-show-message-timeout 30
+  "Time to show the Tramp buffer in case of an error.
+If it is bound to nil, the buffer is not shown.  This is used in
+tramp-tests.el.")
+
+(defsubst tramp-error-with-buffer
+  (buf vec-or-proc signal fmt-string &rest arguments)
+  "Emit an error, and show BUF.
+If BUF is nil, show the connection buf.  Wait for 30\", or until
+an input event arrives.  The other arguments are passed to `tramp-error'."
+  (save-window-excursion
+    (let* ((buf (or (and (bufferp buf) buf)
+                   (and (processp vec-or-proc) (process-buffer vec-or-proc))
+                   (and (tramp-file-name-p vec-or-proc)
+                        (tramp-get-connection-buffer vec-or-proc))))
+          (vec (or (and (tramp-file-name-p vec-or-proc) vec-or-proc)
+                   (and buf (tramp-dissect-file-name
+                             (tramp-get-default-directory buf))))))
+      (unwind-protect
+         (apply #'tramp-error vec-or-proc signal fmt-string arguments)
+       ;; Save exit.
+       (when (and buf
+                  (natnump tramp-error-show-message-timeout)
+                  (not (zerop tramp-verbose))
+                  ;; Do not show when flagged from outside.
+                  (not non-essential)
+                  ;; Show only when Emacs has started already.
+                  (current-message))
+         (let ((enable-recursive-minibuffers t)
+               inhibit-message)
+           ;; `tramp-error' does not show messages.  So we must do it
+           ;; ourselves.
+           (apply #'message fmt-string arguments)
+           ;; Show buffer.
+           (pop-to-buffer buf)
+           (discard-input)
+           (sit-for tramp-error-show-message-timeout)))
+       ;; Reset timestamp.  It would be wrong after waiting for a while.
+       (when (tramp-file-name-equal-p vec (car tramp-current-connection))
+         (setcdr tramp-current-connection (current-time)))))))
+
+(defsubst tramp-user-error (vec-or-proc fmt-string &rest arguments)
+  "Signal a user error (or \"pilot error\")."
+  (unwind-protect
+      (apply #'tramp-error vec-or-proc 'user-error fmt-string arguments)
+    ;; Save exit.
+    (when (and (natnump tramp-error-show-message-timeout)
+              (not (zerop tramp-verbose))
+              ;; Do not show when flagged from outside.
+              (not non-essential)
+              ;; Show only when Emacs has started already.
+              (current-message))
+      (let ((enable-recursive-minibuffers t)
+           inhibit-message)
+       ;; `tramp-error' does not show messages.  So we must do it ourselves.
+       (apply #'message fmt-string arguments)
+       (discard-input)
+       (sit-for tramp-error-show-message-timeout)
+       ;; Reset timestamp.  It would be wrong after waiting for a while.
+       (when
+           (tramp-file-name-equal-p vec-or-proc (car tramp-current-connection))
+         (setcdr tramp-current-connection (current-time)))))))
+
+(defmacro tramp-with-demoted-errors (vec-or-proc format &rest body)
+  "Execute BODY while redirecting the error message to `tramp-message'.
+BODY is executed like wrapped by `with-demoted-errors'.  FORMAT
+is a format-string containing a %-sequence meaning to substitute
+the resulting error message."
+  (declare (indent 2) (debug (symbolp form body)))
+  (let ((err (make-symbol "err")))
+    `(condition-case-unless-debug ,err
+         (progn ,@body)
+       (error (tramp-message ,vec-or-proc 3 ,format ,err) nil))))
+
+(defun tramp-debug-button-action (button)
+  "Goto the linked message in debug buffer at place."
+  (when (mouse-event-p last-input-event) (mouse-set-point last-input-event))
+  (when-let ((point (button-get button 'position)))
+    (goto-char point)))
+
+(put #'tramp-debug-button-action 'tramp-suppress-trace t)
+
+(define-button-type 'tramp-debug-button-type
+  'follow-link t
+  'mouse-face 'highlight
+  'action #'tramp-debug-button-action)
+
+(defun tramp-debug-link-messages (pos1 pos2)
+  "Set links for two messages in current buffer.
+The link buttons are in the verbositiy level substrings."
+  (save-excursion
+    (let (beg1 end1 beg2 end2)
+      (goto-char pos1)
+      ;; Find positions.
+      (while (not (search-forward-regexp
+                  tramp-debug-outline-regexp (line-end-position) t))
+       (forward-line))
+      (setq beg1 (1- (match-beginning 3)) end1 (1+ (match-end 3)))
+      (goto-char pos2)
+      (while (not (search-forward-regexp
+                  tramp-debug-outline-regexp (line-end-position) t))
+       (forward-line))
+      (setq beg2 (1- (match-beginning 3)) end2 (1+ (match-end 3)))
+      ;; Create text buttons.
+      (make-text-button
+       beg1 end1 :type 'tramp-debug-button-type
+       'position (set-marker (make-marker) beg2)
+       'help-echo "mouse-2, RET: goto exit message")
+      (make-text-button
+       beg2 end2 :type 'tramp-debug-button-type
+       'position (set-marker (make-marker) beg1)
+       'help-echo "mouse-2, RET: goto entry message"))))
+
+(put #'tramp-debug-link-messages 'tramp-suppress-trace t)
+
+(defvar tramp-debug-nesting ""
+  "Indicator for debug messages nested level.
+This shouldn't be changed globally, but let-bind where needed.")
+
+(defvar tramp-debug-message-fnh-function nil
+  "The used file name handler operation.
+Bound in `tramp-*-file-name-handler' functions.")
+
+(defun tramp-debug-message-buttonize (position)
+  "Buttonize function in current buffer, at next line starting after POSTION."
+  (save-excursion
+    (goto-char position)
+    (while (not (search-forward-regexp
+                tramp-debug-outline-regexp (line-end-position) t))
+      (forward-line))
+    (let ((fun (intern (match-string 2))))
+      (make-text-button
+       (match-beginning 2) (match-end 2)
+       :type 'help-function-def
+       'help-args (list fun (symbol-file fun))))))
+
+(put #'tramp-debug-message-buttonize 'tramp-suppress-trace t)
+
+;; This is used in `tramp-file-name-handler' and 
`tramp-*-maybe-open-connection'.
+(defmacro with-tramp-debug-message (vec message &rest body)
+  "Execute BODY, embedded with MESSAGE in the debug buffer of VEC.
+If BODY does not raise a debug message, MESSAGE is ignored."
+  (declare (indent 2) (debug t))
+  (let ((result (make-symbol "result")))
+    `(if (and tramp-debug-command-messages (>= tramp-verbose 6))
+        (save-match-data
+          (let ((tramp-debug-nesting
+                 (concat tramp-debug-nesting "#"))
+                (buf (tramp-get-debug-buffer ,vec))
+                beg end ,result)
+            ;; Insert entry message.
+            (with-current-buffer buf
+              (setq beg (point))
+              (tramp-debug-message
+               ,vec "(4) %s %s ..." tramp-debug-nesting ,message)
+              (setq end (point)))
+            (unwind-protect
+                ;; Run BODY.
+                (setq tramp-debug-message-fnh-function nil
+                      ,result (progn ,@body))
+              (with-current-buffer buf
+                (if (= end (point-max))
+                    (progn
+                      (delete-region beg end)
+                      (when (bobp) (kill-buffer)))
+                  ;; Insert exit message.
+                  (tramp-debug-message
+                   ,vec "(5) %s %s ... %s" tramp-debug-nesting ,message 
,result)
+                  ;; Adapt file name handler function.
+                  (dolist (pos (list (point-max) end))
+                    (goto-char pos)
+                    (when (and tramp-debug-message-fnh-function
+                               (search-backward
+                                "tramp-file-name-handler"
+                                (line-beginning-position) t))
+                      (replace-match
+                       (symbol-name tramp-debug-message-fnh-function))
+                      (tramp-debug-message-buttonize
+                       (line-beginning-position))))
+                  ;; Link related messages.
+                  (goto-char (point-max))
+                  (tramp-debug-link-messages beg 
(line-beginning-position)))))))
+
+       ;; No special messages.
+       ,@body)))
+
+(add-hook 'tramp-unload-hook
+         (lambda ()
+           (unload-feature 'tramp-message 'force)))
+
+(provide 'tramp-message)
diff --git a/lisp/net/tramp-rclone.el b/lisp/net/tramp-rclone.el
index df46bd5e20e..c2b84845f68 100644
--- a/lisp/net/tramp-rclone.el
+++ b/lisp/net/tramp-rclone.el
@@ -175,8 +175,10 @@ Operations not mentioned here will be handled by the 
default Emacs primitives.")
 First arg specifies the OPERATION, second arg is a list of
 arguments to pass to the OPERATION."
   (if-let ((fn (assoc operation tramp-rclone-file-name-handler-alist)))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (tramp--with-startup
@@ -377,53 +379,55 @@ connection if a previous connection has died for some 
reason."
   (unless (tramp-connectable-p vec)
     (throw 'non-essential 'non-essential))
 
-  (let ((host (tramp-file-name-host vec)))
-    (when (rassoc `(,host) (tramp-rclone-parse-device-names nil))
-      (if (tramp-string-empty-or-nil-p host)
-         (tramp-error vec 'file-error "Storage %s not connected" host))
-      ;; We need a process bound to the connection buffer.  Therefore,
-      ;; we create a dummy process.  Maybe there is a better solution?
-      (unless (get-buffer-process (tramp-get-connection-buffer vec))
-       (let ((p (make-network-process
-                 :name (tramp-get-connection-name vec)
-                 :buffer (tramp-get-connection-buffer vec)
-                 :server t :host 'local :service t :noquery t)))
-         (tramp-post-process-creation p vec)
-
-         ;; Set connection-local variables.
-         (tramp-set-connection-local-variables vec)))
-
-      ;; Create directory.
-      (unless (file-directory-p (tramp-fuse-mount-point vec))
-       (make-directory (tramp-fuse-mount-point vec) 'parents))
-
-      ;; Mount.  This command does not return, so we use 0 as
-      ;; DESTINATION of `tramp-call-process'.
-      (unless (tramp-fuse-mounted-p vec)
-       (apply
-        #'tramp-call-process
-        vec tramp-rclone-program nil 0 nil
-        "mount" (tramp-fuse-mount-spec vec)
-        (tramp-fuse-mount-point vec)
-        (tramp-get-method-parameter vec 'tramp-mount-args))
-       (while (not (file-exists-p (tramp-make-tramp-file-name vec 'noloc)))
-         (tramp-cleanup-connection vec 'keep-debug 'keep-password))
-
-       ;; Mark it as connected.
-       (add-to-list 'tramp-fuse-mount-points (tramp-file-name-unify vec))
-       (tramp-set-connection-property
-        (tramp-get-connection-process vec) "connected" t))))
-
-  ;; In `tramp-check-cached-permissions', the connection properties
-  ;; "{uid,gid}-{integer,string}" are used.  We set them to proper values.
-  (with-tramp-connection-property
-      vec "uid-integer" (tramp-get-local-uid 'integer))
-  (with-tramp-connection-property
-      vec "gid-integer" (tramp-get-local-gid 'integer))
-  (with-tramp-connection-property
-      vec "uid-string" (tramp-get-local-uid 'string))
-  (with-tramp-connection-property
-      vec "gid-string" (tramp-get-local-gid 'string)))
+  (with-tramp-debug-message vec "Opening connection"
+    (let ((host (tramp-file-name-host vec)))
+      (when (rassoc `(,host) (tramp-rclone-parse-device-names nil))
+       (if (tramp-string-empty-or-nil-p host)
+           (tramp-error vec 'file-error "Storage %s not connected" host))
+       ;; We need a process bound to the connection buffer.
+       ;; Therefore, we create a dummy process.  Maybe there is a
+       ;; better solution?
+       (unless (get-buffer-process (tramp-get-connection-buffer vec))
+         (let ((p (make-network-process
+                   :name (tramp-get-connection-name vec)
+                   :buffer (tramp-get-connection-buffer vec)
+                   :server t :host 'local :service t :noquery t)))
+           (tramp-post-process-creation p vec)
+
+           ;; Set connection-local variables.
+           (tramp-set-connection-local-variables vec)))
+
+       ;; Create directory.
+       (unless (file-directory-p (tramp-fuse-mount-point vec))
+         (make-directory (tramp-fuse-mount-point vec) 'parents))
+
+       ;; Mount.  This command does not return, so we use 0 as
+       ;; DESTINATION of `tramp-call-process'.
+       (unless (tramp-fuse-mounted-p vec)
+         (apply
+          #'tramp-call-process
+          vec tramp-rclone-program nil 0 nil
+          "mount" (tramp-fuse-mount-spec vec)
+          (tramp-fuse-mount-point vec)
+          (tramp-get-method-parameter vec 'tramp-mount-args))
+         (while (not (file-exists-p (tramp-make-tramp-file-name vec 'noloc)))
+           (tramp-cleanup-connection vec 'keep-debug 'keep-password))
+
+         ;; Mark it as connected.
+         (add-to-list 'tramp-fuse-mount-points (tramp-file-name-unify vec))
+         (tramp-set-connection-property
+          (tramp-get-connection-process vec) "connected" t))))
+
+    ;; In `tramp-check-cached-permissions', the connection properties
+    ;; "{uid,gid}-{integer,string}" are used.  We set them to proper values.
+    (with-tramp-connection-property
+       vec "uid-integer" (tramp-get-local-uid 'integer))
+    (with-tramp-connection-property
+       vec "gid-integer" (tramp-get-local-gid 'integer))
+    (with-tramp-connection-property
+       vec "uid-string" (tramp-get-local-uid 'string))
+    (with-tramp-connection-property
+       vec "gid-string" (tramp-get-local-gid 'string))))
 
 (defun tramp-rclone-send-command (vec &rest args)
   "Send a command to connection VEC.
diff --git a/lisp/net/tramp-sh.el b/lisp/net/tramp-sh.el
index 0cb953e2d80..e889cb2e86f 100644
--- a/lisp/net/tramp-sh.el
+++ b/lisp/net/tramp-sh.el
@@ -1571,7 +1571,7 @@ ID-FORMAT valid values are `string' and `integer'."
                       (tramp-shell-quote-argument localname))))
          (with-current-buffer (tramp-get-connection-buffer v)
            (goto-char (point-min))
-           (when (re-search-forward regexp (line-end-position) t)
+           (when (search-forward-regexp regexp (line-end-position) t)
              (setq context (list (match-string 1) (match-string 2)
                                  (match-string 3) (match-string 4))))))
        ;; Return the context.
@@ -2152,7 +2152,7 @@ the uid and gid from FILENAME."
                (or
                 (and keep-date
                      ;; Mask cp -f error.
-                     (re-search-forward
+                     (search-forward-regexp
                       tramp-operation-not-permitted-regexp nil t))
                 cmd-result)
              (tramp-error-with-buffer
@@ -2612,7 +2612,7 @@ The method used must be an out-of-band method."
        (save-restriction
          (narrow-to-region beg-marker end-marker)
          ;; Check for "--dired" output.
-         (when (re-search-backward
+         (when (search-backward-regexp
                 (rx bol "//DIRED//" (+ blank) (group (+ nonl)) eol)
                 nil 'noerror)
            (let ((beg (match-beginning 1))
@@ -2627,7 +2627,7 @@ The method used must be an out-of-band method."
                      (put-text-property start end 'dired-filename t))))))
          ;; Remove trailing lines.
          (goto-char (point-max))
-         (while (re-search-backward (rx bol "//") nil 'noerror)
+         (while (search-backward-regexp (rx bol "//") nil 'noerror)
            (forward-line 1)
            (delete-region (match-beginning 0) (point))))
        ;; Reset multibyte if needed.
@@ -2639,7 +2639,7 @@ The method used must be an out-of-band method."
          (unless (tramp-compat-string-search
                   "color" (tramp-get-connection-property v "ls" ""))
            (goto-char (point-min))
-           (while (re-search-forward ansi-color-control-seq-regexp nil t)
+           (while (search-forward-regexp ansi-color-control-seq-regexp nil t)
              (replace-match "")))
 
           ;; Now decode what read if necessary.  Stolen from 
`insert-directory'.
@@ -2686,7 +2686,8 @@ The method used must be an out-of-band method."
          ;; Try to insert the amount of free space.
          (goto-char (point-min))
          ;; First find the line to put it on.
-         (when (and (re-search-forward (rx bol (group (* blank) "total")) nil 
t)
+         (when (and (search-forward-regexp
+                     (rx bol (group (* blank) "total")) nil t)
                     ;; Emacs 29.1 or later.
                     (not (fboundp 'dired--insert-disk-space)))
            (when-let ((available (get-free-disk-space ".")))
@@ -3639,8 +3640,10 @@ implementation will be used."
   "Invoke remote-shell Tramp file name handler.
 Fall back to normal file name handler if no Tramp handler exists."
   (if-let ((fn (assoc operation tramp-sh-file-name-handler-alist)))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (defun tramp-sh-file-name-handler-p (vec)
@@ -5038,235 +5041,240 @@ connection if a previous connection has died for some 
reason."
   (unless (tramp-connectable-p vec)
     (throw 'non-essential 'non-essential))
 
-  (let ((p (tramp-get-connection-process vec))
-       (process-name (tramp-get-connection-property vec "process-name"))
-       (process-environment (copy-sequence process-environment))
-       (pos (with-current-buffer (tramp-get-connection-buffer vec) (point))))
-
-    ;; If Tramp opens the same connection within a short time frame,
-    ;; there is a problem.  We shall signal this.
-    (unless (or (process-live-p p)
-                (and (processp p) (not non-essential))
-               (not (tramp-file-name-equal-p
-                     vec (car tramp-current-connection)))
-               (time-less-p
-                (time-since (cdr tramp-current-connection))
-                (or tramp-connection-min-time-diff 0)))
-      (throw 'suppress 'suppress))
-
-    ;; If too much time has passed since last command was sent, look
-    ;; whether process is still alive.  If it isn't, kill it.  When
-    ;; using ssh, it can sometimes happen that the remote end has hung
-    ;; up but the local ssh client doesn't recognize this until it
-    ;; tries to send some data to the remote end.  So that's why we
-    ;; try to send a command from time to time, then look again
-    ;; whether the process is really alive.
-    (condition-case nil
-       (when (and (time-less-p
-                   60 (time-since
-                       (tramp-get-connection-property p "last-cmd-time" 0)))
-                  (process-live-p p))
-         (tramp-send-command vec "echo are you awake" t t)
-         (unless (and (process-live-p p)
-                      (tramp-wait-for-output p 10))
-           ;; The error will be caught locally.
-           (tramp-error vec 'file-error "Awake did fail")))
-      (file-error
-       (tramp-cleanup-connection vec t)
-       (setq p nil)))
-
-    ;; New connection must be opened.
-    (condition-case err
-       (unless (process-live-p p)
-         (with-tramp-progress-reporter
-             vec 3
-             (if (tramp-string-empty-or-nil-p (tramp-file-name-user vec))
-                 (format "Opening connection %s for %s using %s"
+  (with-tramp-debug-message vec "Opening connection"
+    (let ((p (tramp-get-connection-process vec))
+         (process-name (tramp-get-connection-property vec "process-name"))
+         (process-environment (copy-sequence process-environment))
+         (pos (with-current-buffer (tramp-get-connection-buffer vec) (point))))
+
+      ;; If Tramp opens the same connection within a short time frame,
+      ;; there is a problem.  We shall signal this.
+      (unless (or (process-live-p p)
+                  (and (processp p) (not non-essential))
+                 (not (tramp-file-name-equal-p
+                       vec (car tramp-current-connection)))
+                 (time-less-p
+                  (time-since (cdr tramp-current-connection))
+                  (or tramp-connection-min-time-diff 0)))
+       (throw 'suppress 'suppress))
+
+      ;; If too much time has passed since last command was sent, look
+      ;; whether process is still alive.  If it isn't, kill it.  When
+      ;; using ssh, it can sometimes happen that the remote end has
+      ;; hung up but the local ssh client doesn't recognize this until
+      ;; it tries to send some data to the remote end.  So that's why
+      ;; we try to send a command from time to time, then look again
+      ;; whether the process is really alive.
+      (condition-case nil
+         (when (and (time-less-p
+                     60 (time-since
+                         (tramp-get-connection-property p "last-cmd-time" 0)))
+                    (process-live-p p))
+           (tramp-send-command vec "echo are you awake" t t)
+           (unless (and (process-live-p p)
+                        (tramp-wait-for-output p 10))
+             ;; The error will be caught locally.
+             (tramp-error vec 'file-error "Awake did fail")))
+       (file-error
+        (tramp-cleanup-connection vec t)
+        (setq p nil)))
+
+      ;; New connection must be opened.
+      (condition-case err
+         (unless (process-live-p p)
+           (with-tramp-progress-reporter
+               vec 3
+               (if (tramp-string-empty-or-nil-p (tramp-file-name-user vec))
+                   (format "Opening connection %s for %s using %s"
+                           process-name
+                           (tramp-file-name-host vec)
+                           (tramp-file-name-method vec))
+                 (format "Opening connection %s for %s@%s using %s"
                          process-name
+                         (tramp-file-name-user vec)
                          (tramp-file-name-host vec)
-                         (tramp-file-name-method vec))
-               (format "Opening connection %s for %s@%s using %s"
-                       process-name
-                       (tramp-file-name-user vec)
-                       (tramp-file-name-host vec)
-                       (tramp-file-name-method vec)))
-
-           (catch 'uname-changed
-             ;; Start new process.
-             (when (and p (processp p))
-               (delete-process p))
-             (setenv "TERM" tramp-terminal-type)
-             (setenv "LC_ALL" (tramp-get-local-locale vec))
-             (if (stringp tramp-histfile-override)
-                 (setenv "HISTFILE" tramp-histfile-override)
-               (if tramp-histfile-override
-                   (progn
-                     (setenv "HISTFILE")
-                     (setenv "HISTFILESIZE" "0")
-                     (setenv "HISTSIZE" "0"))))
-             (setenv "PROMPT_COMMAND")
-             (setenv "PS1" tramp-initial-end-of-output)
-              (unless (stringp tramp-encoding-shell)
-                (tramp-error vec 'file-error "`tramp-encoding-shell' not set"))
-             (let* ((current-host tramp-system-name)
-                    (target-alist (tramp-compute-multi-hops vec))
-                    (previous-hop tramp-null-hop)
-                    ;; We will apply `tramp-ssh-controlmaster-options'
-                    ;; only for the first hop.
-                    (options (tramp-ssh-controlmaster-options vec))
-                    (process-connection-type tramp-process-connection-type)
-                    (process-adaptive-read-buffering nil)
-                    ;; There are unfortunate settings for "cmdproxy" on
-                    ;; W32 systems.
-                    (process-coding-system-alist nil)
-                    (coding-system-for-read nil)
-                    (extra-args (tramp-get-sh-extra-args tramp-encoding-shell))
-                    ;; This must be done in order to avoid our file
-                    ;; name handler.
-                    (p (let ((default-directory
-                               tramp-compat-temporary-file-directory))
-                         (apply
-                          #'start-process
-                          (tramp-get-connection-name vec)
-                          (tramp-get-connection-buffer vec)
-                          (append
-                           (list tramp-encoding-shell)
-                           (and extra-args (split-string extra-args))
-                           (and tramp-encoding-command-interactive
-                                (list tramp-encoding-command-interactive)))))))
-
-               ;; This is neded for ssh or PuTTY based processes, and
-               ;; only if the respective options are set.  Perhaps,
-               ;; the setting could be more fine-grained.
-               ;; (process-put p 'tramp-shared-socket t)
-               ;; Set sentinel.  Initialize variables.
-               (set-process-sentinel p #'tramp-process-sentinel)
-               (tramp-post-process-creation p vec)
-               (setq tramp-current-connection (cons vec (current-time)))
-
-               ;; Set connection-local variables.
-               (tramp-set-connection-local-variables vec)
-
-               ;; Check whether process is alive.
-               (tramp-barf-if-no-shell-prompt
-                p 10
-                "Couldn't find local shell prompt for %s" tramp-encoding-shell)
-
-               ;; Now do all the connections as specified.
-               (while target-alist
-                 (let* ((hop (car target-alist))
-                        (l-method (tramp-file-name-method hop))
-                        (l-user (tramp-file-name-user hop))
-                        (l-domain (tramp-file-name-domain hop))
-                        (l-host (tramp-file-name-host hop))
-                        (l-port (tramp-file-name-port hop))
-                        (remote-shell
-                         (tramp-get-method-parameter hop 'tramp-remote-shell))
-                        (extra-args (tramp-get-sh-extra-args remote-shell))
-                        (async-args
-                         (flatten-tree
-                          (tramp-get-method-parameter hop 'tramp-async-args)))
-                        (connection-timeout
-                         (tramp-get-method-parameter
-                          hop 'tramp-connection-timeout))
-                        (command
-                         (tramp-get-method-parameter hop 'tramp-login-program))
-                        ;; We don't create the temporary file.  In
-                        ;; fact, it is just a prefix for the
-                        ;; ControlPath option of ssh; the real
-                        ;; temporary file has another name, and it is
-                        ;; created and protected by ssh.  It is also
-                        ;; removed by ssh when the connection is
-                        ;; closed.  The temporary file name is cached
-                        ;; in the main connection process, therefore
-                        ;; we cannot use `tramp-get-connection-process'.
-                        (tmpfile
-                         (with-tramp-connection-property
-                             (tramp-get-process vec) "temp-file"
-                           (tramp-compat-make-temp-name)))
-                        r-shell)
-
-                   ;; Check, whether there is a restricted shell.
-                   (dolist (elt tramp-restricted-shell-hosts-alist)
-                     (when (string-match-p elt current-host)
-                       (setq r-shell t)))
-                   (setq current-host l-host)
-
-                   ;; Set password prompt vector.
-                   (tramp-set-connection-property
-                    p "password-vector"
-                    (if (tramp-get-method-parameter
-                         hop 'tramp-password-previous-hop)
-                        (let ((pv (copy-tramp-file-name previous-hop)))
-                          (setf (tramp-file-name-method pv) l-method)
-                          pv)
-                      (make-tramp-file-name
-                       :method l-method :user l-user :domain l-domain
-                       :host l-host :port l-port)))
-
-                   ;; Set session timeout.
-                   (when (tramp-get-method-parameter
-                          hop 'tramp-session-timeout)
+                         (tramp-file-name-method vec)))
+
+             (catch 'uname-changed
+               ;; Start new process.
+               (when (and p (processp p))
+                 (delete-process p))
+               (setenv "TERM" tramp-terminal-type)
+               (setenv "LC_ALL" (tramp-get-local-locale vec))
+               (if (stringp tramp-histfile-override)
+                   (setenv "HISTFILE" tramp-histfile-override)
+                 (if tramp-histfile-override
+                     (progn
+                       (setenv "HISTFILE")
+                       (setenv "HISTFILESIZE" "0")
+                       (setenv "HISTSIZE" "0"))))
+               (setenv "PROMPT_COMMAND")
+               (setenv "PS1" tramp-initial-end-of-output)
+               (unless (stringp tramp-encoding-shell)
+                  (tramp-error vec 'file-error "`tramp-encoding-shell' not 
set"))
+               (let* ((current-host tramp-system-name)
+                      (target-alist (tramp-compute-multi-hops vec))
+                      (previous-hop tramp-null-hop)
+                      ;; We will apply `tramp-ssh-controlmaster-options'
+                      ;; only for the first hop.
+                      (options (tramp-ssh-controlmaster-options vec))
+                      (process-connection-type tramp-process-connection-type)
+                      (process-adaptive-read-buffering nil)
+                      ;; There are unfortunate settings for
+                      ;; "cmdproxy" on W32 systems.
+                      (process-coding-system-alist nil)
+                      (coding-system-for-read nil)
+                      (extra-args
+                       (tramp-get-sh-extra-args tramp-encoding-shell))
+                      ;; This must be done in order to avoid our file
+                      ;; name handler.
+                      (p (let ((default-directory
+                                tramp-compat-temporary-file-directory))
+                           (apply
+                            #'start-process
+                            (tramp-get-connection-name vec)
+                            (tramp-get-connection-buffer vec)
+                            (append
+                             `(,tramp-encoding-shell)
+                             (and extra-args (split-string extra-args))
+                             (and tramp-encoding-command-interactive
+                                  `(,tramp-encoding-command-interactive)))))))
+
+                 ;; This is neded for ssh or PuTTY based processes,
+                 ;; and only if the respective options are set.
+                 ;; Perhaps, the setting could be more fine-grained.
+                 ;; (process-put p 'tramp-shared-socket t)
+                 ;; Set sentinel.  Initialize variables.
+                 (set-process-sentinel p #'tramp-process-sentinel)
+                 (tramp-post-process-creation p vec)
+                 (setq tramp-current-connection (cons vec (current-time)))
+
+                 ;; Set connection-local variables.
+                 (tramp-set-connection-local-variables vec)
+
+                 ;; Check whether process is alive.
+                 (tramp-barf-if-no-shell-prompt
+                  p 10
+                  "Couldn't find local shell prompt for %s"
+                  tramp-encoding-shell)
+
+                 ;; Now do all the connections as specified.
+                 (while target-alist
+                   (let* ((hop (car target-alist))
+                          (l-method (tramp-file-name-method hop))
+                          (l-user (tramp-file-name-user hop))
+                          (l-domain (tramp-file-name-domain hop))
+                          (l-host (tramp-file-name-host hop))
+                          (l-port (tramp-file-name-port hop))
+                          (remote-shell
+                           (tramp-get-method-parameter hop 
'tramp-remote-shell))
+                          (extra-args (tramp-get-sh-extra-args remote-shell))
+                          (async-args
+                           (flatten-tree
+                            (tramp-get-method-parameter hop 
'tramp-async-args)))
+                          (connection-timeout
+                           (tramp-get-method-parameter
+                            hop 'tramp-connection-timeout))
+                          (command
+                           (tramp-get-method-parameter
+                            hop 'tramp-login-program))
+                          ;; We don't create the temporary file.  In
+                          ;; fact, it is just a prefix for the
+                          ;; ControlPath option of ssh; the real
+                          ;; temporary file has another name, and it
+                          ;; is created and protected by ssh.  It is
+                          ;; also removed by ssh when the connection
+                          ;; is closed.  The temporary file name is
+                          ;; cached in the main connection process,
+                          ;; therefore we cannot use
+                          ;; `tramp-get-connection-process'.
+                          (tmpfile
+                           (with-tramp-connection-property
+                               (tramp-get-process vec) "temp-file"
+                             (tramp-compat-make-temp-name)))
+                          r-shell)
+
+                     ;; Check, whether there is a restricted shell.
+                     (dolist (elt tramp-restricted-shell-hosts-alist)
+                       (when (string-match-p elt current-host)
+                         (setq r-shell t)))
+                     (setq current-host l-host)
+
+                     ;; Set password prompt vector.
                      (tramp-set-connection-property
-                      p "session-timeout"
-                      (tramp-get-method-parameter
-                       hop 'tramp-session-timeout)))
-
-                   ;; Replace `login-args' place holders.
-                   (setq
-                    command
-                    (string-join
-                     (append
-                      ;; We do not want to see the trailing local
-                      ;; prompt in `start-file-process'.
-                      (unless r-shell '("exec"))
-                      `(,command)
-                      ;; Add arguments for asynchronous processes.
-                      (when process-name async-args)
-                      (tramp-expand-args
-                       hop 'tramp-login-args
-                       ?h (or l-host "") ?u (or l-user "") ?p (or l-port "")
-                       ?c (format-spec options (format-spec-make ?t tmpfile))
-                       ?n (concat
-                           "2>" (tramp-get-remote-null-device previous-hop))
-                       ?l (concat remote-shell " " extra-args " -i"))
-                      ;; A restricted shell does not allow "exec".
-                      (when r-shell '("&&" "exit" "||" "exit")))
-                     " "))
-
-                   ;; Send the command.
-                   (tramp-message vec 3 "Sending command `%s'" command)
-                   (tramp-send-command vec command t t)
-                   (tramp-process-actions
-                    p vec
-                    (min
-                     pos (with-current-buffer (process-buffer p) (point-max)))
-                    tramp-actions-before-shell
-                    (or connection-timeout tramp-connection-timeout))
-                   (tramp-message
-                    vec 3 "Found remote shell prompt on `%s'" l-host)
-
-                   ;; Next hop.
-                   (setq options ""
-                         target-alist (cdr target-alist)
-                         previous-hop hop)))
-
-               ;; Activate session timeout.
-               (when (tramp-get-connection-property p "session-timeout")
-                 (run-at-time
-                  (tramp-get-connection-property p "session-timeout") nil
-                  #'tramp-timeout-session vec))
-
-               ;; Make initial shell settings.
-               (tramp-open-connection-setup-interactive-shell p vec)
-
-               ;; Mark it as connected.
-               (tramp-set-connection-property p "connected" t)))))
-
-      ;; Cleanup, and propagate the signal.
-      ((error quit)
-       (tramp-cleanup-connection vec t)
-       (signal (car err) (cdr err))))))
+                      p "password-vector"
+                      (if (tramp-get-method-parameter
+                           hop 'tramp-password-previous-hop)
+                          (let ((pv (copy-tramp-file-name previous-hop)))
+                            (setf (tramp-file-name-method pv) l-method)
+                            pv)
+                        (make-tramp-file-name
+                         :method l-method :user l-user :domain l-domain
+                         :host l-host :port l-port)))
+
+                     ;; Set session timeout.
+                     (when (tramp-get-method-parameter
+                            hop 'tramp-session-timeout)
+                       (tramp-set-connection-property
+                        p "session-timeout"
+                        (tramp-get-method-parameter
+                         hop 'tramp-session-timeout)))
+
+                     ;; Replace `login-args' place holders.
+                     (setq
+                      command
+                      (string-join
+                       (append
+                        ;; We do not want to see the trailing local
+                        ;; prompt in `start-file-process'.
+                        (unless r-shell '("exec"))
+                        `(,command)
+                        ;; Add arguments for asynchronous processes.
+                        (when process-name async-args)
+                        (tramp-expand-args
+                         hop 'tramp-login-args
+                         ?h (or l-host "") ?u (or l-user "") ?p (or l-port "")
+                         ?c (format-spec options (format-spec-make ?t tmpfile))
+                         ?n (concat
+                             "2>" (tramp-get-remote-null-device previous-hop))
+                         ?l (concat remote-shell " " extra-args " -i"))
+                        ;; A restricted shell does not allow "exec".
+                        (when r-shell '("&&" "exit" "||" "exit")))
+                       " "))
+
+                     ;; Send the command.
+                     (tramp-message vec 3 "Sending command `%s'" command)
+                     (tramp-send-command vec command t t)
+                     (tramp-process-actions
+                      p vec
+                      (min
+                       pos (with-current-buffer (process-buffer p) 
(point-max)))
+                      tramp-actions-before-shell
+                      (or connection-timeout tramp-connection-timeout))
+                     (tramp-message
+                      vec 3 "Found remote shell prompt on `%s'" l-host)
+
+                     ;; Next hop.
+                     (setq options ""
+                           target-alist (cdr target-alist)
+                           previous-hop hop)))
+
+                 ;; Activate session timeout.
+                 (when (tramp-get-connection-property p "session-timeout")
+                   (run-at-time
+                    (tramp-get-connection-property p "session-timeout") nil
+                    #'tramp-timeout-session vec))
+
+                 ;; Make initial shell settings.
+                 (tramp-open-connection-setup-interactive-shell p vec)
+
+                 ;; Mark it as connected.
+                 (tramp-set-connection-property p "connected" t)))))
+
+       ;; Cleanup, and propagate the signal.
+       ((error quit)
+        (tramp-cleanup-connection vec t)
+        (signal (car err) (cdr err)))))))
 
 (defun tramp-send-command (vec command &optional neveropen nooutput)
   "Send the COMMAND to connection VEC.
@@ -5322,7 +5330,7 @@ function waits for output unless NOOUTPUT is set."
            ;; A simple-minded busybox has sent " ^H" sequences.
            ;; Delete them.
            (goto-char (point-min))
-           (when (re-search-forward
+           (when (search-forward-regexp
                   (rx bol (+ nonl "\b") eol) (line-end-position) t)
              (forward-line 1)
              (delete-region (point-min) (point)))
@@ -5404,7 +5412,7 @@ raises an error."
       ;; Read the marker.
       (when (stringp marker)
        (condition-case nil
-           (re-search-forward marker)
+           (search-forward-regexp marker)
          (error (unless noerror
                   (tramp-error
                    vec 'file-error
@@ -5417,7 +5425,7 @@ raises an error."
                     (unless noerror signal-hook-function)))
                (read (current-buffer)))
            ;; Error handling.
-           (when (re-search-forward (rx (not blank)) (line-end-position) t)
+           (when (search-forward-regexp (rx (not blank)) (line-end-position) t)
              (error nil)))
        (error (unless noerror
                 (tramp-error
diff --git a/lisp/net/tramp-smb.el b/lisp/net/tramp-smb.el
index dab85c5160e..60d40fef147 100644
--- a/lisp/net/tramp-smb.el
+++ b/lisp/net/tramp-smb.el
@@ -68,8 +68,8 @@
 (defcustom tramp-smb-acl-program "smbcacls"
   "Name of SMB acls to run."
   :group 'tramp
-  :type 'string
-  :version "24.4")
+  :version "24.4"
+  :type 'string)
 
 (defcustom tramp-smb-conf null-device
   "Path of the \"smb.conf\" file.
@@ -85,8 +85,8 @@ They are added to the `tramp-smb-program' call via \"--option 
'...'\".
 For example, if the deprecated SMB1 protocol shall be used, add to
 this variable \"client min protocol=NT1\"."
   :group 'tramp
-  :type '(repeat string)
-  :version "28.1")
+  :version "28.1"
+  :type '(repeat string))
 
 (defvar tramp-smb-version nil
   "Version string of the SMB client.")
@@ -318,22 +318,22 @@ Operations not mentioned here will be handled by the 
default Emacs primitives.")
 If it isn't found in the local $PATH, the absolute path of winexe
 shall be given.  This is needed for remote processes."
   :group 'tramp
-  :type 'string
-  :version "24.3")
+  :version "24.3"
+  :type 'string)
 
 (defcustom tramp-smb-winexe-shell-command "powershell.exe"
   "Shell to be used for processes on remote machines.
 This must be Powershell V2 compatible."
   :group 'tramp
-  :type 'string
-  :version "24.3")
+  :version "24.3"
+  :type 'string)
 
 (defcustom tramp-smb-winexe-shell-command-switch "-file -"
   "Command switch used together with `tramp-smb-winexe-shell-command'.
 This can be used to disable echo etc."
   :group 'tramp
-  :type 'string
-  :version "24.3")
+  :version "24.3"
+  :type 'string)
 
 ;; It must be a `defsubst' in order to push the whole code into
 ;; tramp-loaddefs.el.  Otherwise, there would be recursive autoloading.
@@ -349,8 +349,10 @@ This can be used to disable echo etc."
 First arg specifies the OPERATION, second arg is a list of
 arguments to pass to the OPERATION."
   (if-let ((fn (assoc operation tramp-smb-file-name-handler-alist)))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (unless (memq system-type '(cygwin windows-nt))
@@ -867,7 +869,7 @@ PRESERVE-UID-GID and PRESERVE-EXTENDED-ATTRIBUTES are 
completely ignored."
       ;; Loop the listing.
       (with-current-buffer (tramp-get-connection-buffer vec)
        (goto-char (point-min))
-       (unless (re-search-forward tramp-smb-errors nil t)
+       (unless (search-forward-regexp tramp-smb-errors nil t)
          (while (not (eobp))
            (cond
             ((looking-at
@@ -1618,7 +1620,7 @@ Result is a list of (LOCALNAME MODE SIZE MONTH DAY TIME 
YEAR)."
          ;; Loop the listing.
          (with-current-buffer (tramp-get-connection-buffer v)
            (goto-char (point-min))
-           (if (re-search-forward tramp-smb-errors nil t)
+           (if (search-forward-regexp tramp-smb-errors nil t)
                (tramp-error v 'file-error "%s `%s'" (match-string 0) directory)
              (while (not (eobp))
                (setq entry (tramp-smb-read-file-entry share))
@@ -1809,8 +1811,8 @@ are listed.  Result is the list (LOCALNAME MODE SIZE 
MTIME)."
          (when (tramp-smb-send-command vec "posix")
            (with-current-buffer (tramp-get-connection-buffer vec)
              (goto-char (point-min))
-             (when
-                 (re-search-forward "Server supports CIFS capabilities" nil t)
+             (when (search-forward-regexp
+                    "Server supports CIFS capabilities" nil t)
                (member
                 "pathnames"
                 (split-string
@@ -1846,153 +1848,152 @@ If ARGUMENT is non-nil, use it as argument for
   (unless (tramp-connectable-p vec)
     (throw 'non-essential 'non-essential))
 
-  (let* ((share (tramp-smb-get-share vec))
-        (buf (tramp-get-connection-buffer vec))
-        (p (get-buffer-process buf)))
+  (with-tramp-debug-message vec "Opening connection"
+    (let* ((share (tramp-smb-get-share vec))
+          (buf (tramp-get-connection-buffer vec))
+          (p (get-buffer-process buf)))
+
+      ;; Check whether we still have the same smbclient version.
+      ;; Otherwise, we must delete the connection cache, because
+      ;; capabilities might have changed.
+      (unless (or argument (processp p))
+       (let ((default-directory tramp-compat-temporary-file-directory)
+             (command (concat tramp-smb-program " -V")))
+
+         (unless tramp-smb-version
+           (unless (executable-find tramp-smb-program)
+             (tramp-error
+              vec 'file-error
+              "Cannot find command %s in %s" tramp-smb-program exec-path))
+           (setq tramp-smb-version (shell-command-to-string command))
+           (tramp-message vec 6 command)
+           (tramp-message vec 6 "\n%s" tramp-smb-version)
+           (if (string-match (rx (+ (any " \t\r\n")) eos) tramp-smb-version)
+               (setq tramp-smb-version
+                     (replace-match "" nil nil tramp-smb-version))))
+
+         (unless (string-equal
+                  tramp-smb-version
+                  (tramp-get-connection-property
+                   vec "smbclient-version" tramp-smb-version))
+           (tramp-flush-directory-properties vec "/")
+           (tramp-flush-connection-properties vec))
+
+         (tramp-set-connection-property
+          vec "smbclient-version" tramp-smb-version)))
+
+      ;; If too much time has passed since last command was sent, look
+      ;; whether there has been an error message; maybe due to
+      ;; connection timeout.
+      (with-current-buffer buf
+       (goto-char (point-min))
+       (when (and (time-less-p
+                   60 (time-since
+                       (tramp-get-connection-property p "last-cmd-time" 0)))
+                  (process-live-p p)
+                  (search-forward-regexp tramp-smb-errors nil t))
+         (delete-process p)
+         (setq p nil)))
+
+      ;; Check whether it is still the same share.
+      (unless (and (process-live-p p)
+                  (or argument
+                      (string-equal
+                       share
+                       (tramp-get-connection-property p "smb-share" ""))))
+       (save-match-data
+         ;; There might be unread output from checking for share names.
+         (when buf (with-current-buffer buf (erase-buffer)))
+         (when (and p (processp p)) (delete-process p))
 
-    ;; Check whether we still have the same smbclient version.
-    ;; Otherwise, we must delete the connection cache, because
-    ;; capabilities might have changed.
-    (unless (or argument (processp p))
-      (let ((default-directory tramp-compat-temporary-file-directory)
-           (command (concat tramp-smb-program " -V")))
+         (let* ((user   (tramp-file-name-user vec))
+                (host   (tramp-file-name-host vec))
+                (domain (tramp-file-name-domain vec))
+                (port   (tramp-file-name-port vec))
+                (options tramp-smb-options)
+                args)
 
-       (unless tramp-smb-version
-         (unless (executable-find tramp-smb-program)
-           (tramp-error
-            vec 'file-error
-            "Cannot find command %s in %s" tramp-smb-program exec-path))
-         (setq tramp-smb-version (shell-command-to-string command))
-         (tramp-message vec 6 command)
-         (tramp-message vec 6 "\n%s" tramp-smb-version)
-         (if (string-match (rx (+ (any " \t\r\n")) eos) tramp-smb-version)
-             (setq tramp-smb-version
-                   (replace-match "" nil nil tramp-smb-version))))
-
-       (unless (string-equal
-                tramp-smb-version
-                (tramp-get-connection-property
-                 vec "smbclient-version" tramp-smb-version))
-         (tramp-flush-directory-properties vec "/")
-         (tramp-flush-connection-properties vec))
-
-       (tramp-set-connection-property
-        vec "smbclient-version" tramp-smb-version)))
-
-    ;; If too much time has passed since last command was sent, look
-    ;; whether there has been an error message; maybe due to
-    ;; connection timeout.
-    (with-current-buffer buf
-      (goto-char (point-min))
-      (when (and (time-less-p
-                 60 (time-since
-                     (tramp-get-connection-property p "last-cmd-time" 0)))
-                (process-live-p p)
-                (re-search-forward tramp-smb-errors nil t))
-       (delete-process p)
-       (setq p nil)))
-
-    ;; Check whether it is still the same share.
-    (unless (and (process-live-p p)
-                (or argument
-                    (string-equal
-                     share
-                     (tramp-get-connection-property p "smb-share" ""))))
-      (save-match-data
-       ;; There might be unread output from checking for share names.
-       (when buf (with-current-buffer buf (erase-buffer)))
-       (when (and p (processp p)) (delete-process p))
-
-       (let* ((user   (tramp-file-name-user vec))
-              (host   (tramp-file-name-host vec))
-              (domain (tramp-file-name-domain vec))
-              (port   (tramp-file-name-port vec))
-              (options tramp-smb-options)
-              args)
-
-         (cond
-          (argument
-           (setq args (list (concat "//" host))))
-          (share
-           (setq args (list (concat "//" host "/" share))))
-          (t
-           (setq args (list "-g" "-L" host ))))
+           (cond
+            (argument (setq args (list (concat "//" host))))
+            (share    (setq args (list (concat "//" host "/" share))))
+            (t        (setq args (list "-g" "-L" host ))))
 
-         (if (tramp-string-empty-or-nil-p user)
-             (setq args (append args (list "-N")))
-           (setq args (append args (list "-U" user))))
+           (if (tramp-string-empty-or-nil-p user)
+               (setq args (append args (list "-N")))
+             (setq args (append args (list "-U" user))))
 
-         (when domain (setq args (append args (list "-W" domain))))
-         (when port   (setq args (append args (list "-p" port))))
-         (when tramp-smb-conf
-           (setq args (append args (list "-s" tramp-smb-conf))))
-         (dolist (option options)
-           (setq args (append args (list "--option" option))))
-         (when argument
-           (setq args (append args (list argument))))
-
-         ;; OK, let's go.
-         (with-tramp-progress-reporter
-             vec 3
-             (format "Opening connection for //%s%s/%s"
-                     (if (tramp-string-empty-or-nil-p user)
-                         "" (concat user "@"))
-                     host (or share ""))
-
-           (let* (coding-system-for-read
-                  (process-connection-type tramp-process-connection-type)
-                  (p (let ((default-directory
-                             tramp-compat-temporary-file-directory)
-                           (process-environment
-                            (cons (concat "TERM=" tramp-terminal-type)
-                                  process-environment)))
-                       (apply #'start-process
-                              (tramp-get-connection-name vec)
-                              (tramp-get-connection-buffer vec)
-                              (if argument
-                                  tramp-smb-winexe-program tramp-smb-program)
-                              args))))
-             (tramp-post-process-creation p vec)
-
-             ;; Set connection-local variables.
-             (tramp-set-connection-local-variables vec)
-
-             (condition-case err
-                 (let ((inhibit-message t))
-                   ;; Play login scenario.
-                   (tramp-process-actions
-                    p vec nil
-                    (if (or argument share)
-                        tramp-smb-actions-with-share
-                      tramp-smb-actions-without-share))
-
-                   ;; Set chunksize to 1.  smbclient reads its input
-                   ;; 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)
-
-                   ;; 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
-               ;; handle this in `tramp-process-actions', because
-               ;; smbclient does not ask for the password, again.
-               (error
-                (with-current-buffer (tramp-get-connection-buffer vec)
-                  (goto-char (point-min))
-                  (if (and (bound-and-true-p auth-sources)
-                           (search-forward-regexp
-                            tramp-smb-wrong-passwd-regexp nil t))
-                      ;; Disable `auth-source' and `password-cache'.
-                      (let (auth-sources)
-                        (tramp-message
-                         vec 3 "Retry connection with new password")
-                        (tramp-cleanup-connection vec t)
-                        (tramp-smb-maybe-open-connection vec argument))
-                    ;; Propagate the error.
-                    (signal (car err) (cdr err)))))))))))))
+           (when domain (setq args (append args (list "-W" domain))))
+           (when port   (setq args (append args (list "-p" port))))
+           (when tramp-smb-conf
+             (setq args (append args (list "-s" tramp-smb-conf))))
+           (dolist (option options)
+             (setq args (append args (list "--option" option))))
+           (when argument
+             (setq args (append args (list argument))))
+
+           ;; OK, let's go.
+           (with-tramp-progress-reporter
+               vec 3
+               (format "Opening connection for //%s%s/%s"
+                       (if (tramp-string-empty-or-nil-p user)
+                           "" (concat user "@"))
+                       host (or share ""))
+
+             (let* (coding-system-for-read
+                    (process-connection-type tramp-process-connection-type)
+                    (p (let ((default-directory
+                              tramp-compat-temporary-file-directory)
+                             (process-environment
+                              (cons (concat "TERM=" tramp-terminal-type)
+                                    process-environment)))
+                         (apply #'start-process
+                                (tramp-get-connection-name vec)
+                                (tramp-get-connection-buffer vec)
+                                (if argument
+                                    tramp-smb-winexe-program tramp-smb-program)
+                                args))))
+               (tramp-post-process-creation p vec)
+
+               ;; Set connection-local variables.
+               (tramp-set-connection-local-variables vec)
+
+               (condition-case err
+                   (let ((inhibit-message t))
+                     ;; Play login scenario.
+                     (tramp-process-actions
+                      p vec nil
+                      (if (or argument share)
+                          tramp-smb-actions-with-share
+                        tramp-smb-actions-without-share))
+
+                     ;; Set chunksize to 1.  smbclient reads its
+                     ;; input 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)
+
+                     ;; 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 handle this in `tramp-process-actions',
+                 ;; because smbclient does not ask for the password,
+                 ;; again.
+                 (error
+                  (with-current-buffer (tramp-get-connection-buffer vec)
+                    (goto-char (point-min))
+                    (if (and (bound-and-true-p auth-sources)
+                             (search-forward-regexp
+                              tramp-smb-wrong-passwd-regexp nil t))
+                        ;; Disable `auth-source' and `password-cache'.
+                        (let (auth-sources)
+                          (tramp-message
+                           vec 3 "Retry connection with new password")
+                          (tramp-cleanup-connection vec t)
+                          (tramp-smb-maybe-open-connection vec argument))
+                      ;; Propagate the error.
+                      (signal (car err) (cdr err))))))))))))))
 
 ;; We don't use timeouts.  If needed, the caller shall wrap around.
 (defun tramp-smb-wait-for-output (vec)
@@ -2003,21 +2004,21 @@ Removes smb prompt.  Returns nil if an error message 
has appeared."
          (inhibit-read-only t))
 
       ;; Read pending output.
-      (while (not (re-search-forward tramp-smb-prompt nil t))
+      (while (not (search-forward-regexp tramp-smb-prompt nil t))
        (while (tramp-accept-process-output p))
        (goto-char (point-min)))
       (tramp-message vec 6 "\n%s" (buffer-string))
 
       ;; Remove prompt.
       (goto-char (point-min))
-      (when (re-search-forward tramp-smb-prompt nil t)
+      (when (search-forward-regexp tramp-smb-prompt nil t)
        (goto-char (point-max))
-       (re-search-backward tramp-smb-prompt nil t)
+       (search-backward-regexp tramp-smb-prompt nil t)
        (delete-region (point) (point-max)))
 
       ;; Return value is whether no error message has appeared.
       (goto-char (point-min))
-      (not (re-search-forward tramp-smb-errors nil t)))))
+      (not (search-forward-regexp tramp-smb-errors nil t)))))
 
 (defun tramp-smb-kill-winexe-function ()
   "Send SIGKILL to the winexe process."
diff --git a/lisp/net/tramp-sshfs.el b/lisp/net/tramp-sshfs.el
index e3c9e0b53b2..86cf63507c6 100644
--- a/lisp/net/tramp-sshfs.el
+++ b/lisp/net/tramp-sshfs.el
@@ -181,8 +181,10 @@ Operations not mentioned here will be handled by the 
default Emacs primitives.")
 First arg specifies the OPERATION, second arg is a list of
 arguments to pass to the OPERATION."
   (if-let ((fn (assoc operation tramp-sshfs-file-name-handler-alist)))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (tramp--with-startup
@@ -393,52 +395,53 @@ connection if a previous connection has died for some 
reason."
   (unless (tramp-connectable-p vec)
     (throw 'non-essential 'non-essential))
 
-  ;; We need a process bound to the connection buffer.  Therefore, we
-  ;; create a dummy process.  Maybe there is a better solution?
-  (unless (get-buffer-process (tramp-get-connection-buffer vec))
-    (let ((p (make-network-process
-             :name (tramp-get-connection-name vec)
-             :buffer (tramp-get-connection-buffer vec)
-             :server t :host 'local :service t :noquery t)))
-      (tramp-post-process-creation p vec)
-
-      ;; Set connection-local variables.
-      (tramp-set-connection-local-variables vec)))
-
-  ;; Create directory.
-  (unless (file-directory-p (tramp-fuse-mount-point vec))
-    (make-directory (tramp-fuse-mount-point vec) 'parents))
-
-  (unless
-      (or (tramp-fuse-mounted-p vec)
-         (with-temp-buffer
-           (zerop
-            (apply
-             #'tramp-call-process
-             vec tramp-sshfs-program nil t nil
-             (tramp-fuse-mount-spec vec)
-             (tramp-fuse-mount-point vec)
-             (tramp-expand-args
-              vec 'tramp-mount-args
-              ?p (or (tramp-file-name-port vec) ""))))))
-    (tramp-error
-     vec 'file-error "Error mounting %s" (tramp-fuse-mount-spec vec)))
-
-  ;; Mark it as connected.
-  (add-to-list 'tramp-fuse-mount-points (tramp-file-name-unify vec))
-  (tramp-set-connection-property
-   (tramp-get-connection-process vec) "connected" t)
-
-  ;; In `tramp-check-cached-permissions', the connection properties
-  ;; "{uid,gid}-{integer,string}" are used.  We set them to proper values.
-  (with-tramp-connection-property
-      vec "uid-integer" (tramp-get-local-uid 'integer))
-  (with-tramp-connection-property
-      vec "gid-integer" (tramp-get-local-gid 'integer))
-  (with-tramp-connection-property
-      vec "uid-string" (tramp-get-local-uid 'string))
-  (with-tramp-connection-property
-      vec "gid-string" (tramp-get-local-gid 'string)))
+  (with-tramp-debug-message vec "Opening connection"
+    ;; We need a process bound to the connection buffer.  Therefore,
+    ;; we create a dummy process.  Maybe there is a better solution?
+    (unless (get-buffer-process (tramp-get-connection-buffer vec))
+      (let ((p (make-network-process
+               :name (tramp-get-connection-name vec)
+               :buffer (tramp-get-connection-buffer vec)
+               :server t :host 'local :service t :noquery t)))
+       (tramp-post-process-creation p vec)
+
+       ;; Set connection-local variables.
+       (tramp-set-connection-local-variables vec)))
+
+    ;; Create directory.
+    (unless (file-directory-p (tramp-fuse-mount-point vec))
+      (make-directory (tramp-fuse-mount-point vec) 'parents))
+
+    (unless
+       (or (tramp-fuse-mounted-p vec)
+           (with-temp-buffer
+             (zerop
+              (apply
+               #'tramp-call-process
+               vec tramp-sshfs-program nil t nil
+               (tramp-fuse-mount-spec vec)
+               (tramp-fuse-mount-point vec)
+               (tramp-expand-args
+                vec 'tramp-mount-args
+                ?p (or (tramp-file-name-port vec) ""))))))
+      (tramp-error
+       vec 'file-error "Error mounting %s" (tramp-fuse-mount-spec vec)))
+
+    ;; Mark it as connected.
+    (add-to-list 'tramp-fuse-mount-points (tramp-file-name-unify vec))
+    (tramp-set-connection-property
+     (tramp-get-connection-process vec) "connected" t)
+
+    ;; In `tramp-check-cached-permissions', the connection properties
+    ;; "{uid,gid}-{integer,string}" are used.  We set them to proper values.
+    (with-tramp-connection-property
+       vec "uid-integer" (tramp-get-local-uid 'integer))
+    (with-tramp-connection-property
+       vec "gid-integer" (tramp-get-local-gid 'integer))
+    (with-tramp-connection-property
+       vec "uid-string" (tramp-get-local-uid 'string))
+    (with-tramp-connection-property
+       vec "gid-string" (tramp-get-local-gid 'string))))
 
 ;; `shell-mode' tries to open remote files like "/sshfs:user@host:~/.history".
 ;; This fails, because the tilde cannot be expanded.  Tell
diff --git a/lisp/net/tramp-sudoedit.el b/lisp/net/tramp-sudoedit.el
index e41a4a590e2..2bbe0945330 100644
--- a/lisp/net/tramp-sudoedit.el
+++ b/lisp/net/tramp-sudoedit.el
@@ -170,8 +170,10 @@ See `tramp-actions-before-shell' for more info.")
 First arg specifies the OPERATION, second arg is a list of
 arguments to pass to the OPERATION."
   (if-let ((fn (assoc operation tramp-sudoedit-file-name-handler-alist)))
-      (save-match-data (apply (cdr fn) args))
-    (tramp-run-real-handler operation args)))
+      (prog1 (save-match-data (apply (cdr fn) args))
+       (setq tramp-debug-message-fnh-function (cdr fn)))
+    (prog1 (tramp-run-real-handler operation args)
+      (setq tramp-debug-message-fnh-function operation))))
 
 ;;;###tramp-autoload
 (tramp--with-startup
@@ -524,7 +526,7 @@ the result will be a local, non-Tramp, file name."
                    v "ls" "-d" "-Z" (file-name-unquote localname)))
          (with-current-buffer (tramp-get-connection-buffer v)
            (goto-char (point-min))
-           (when (re-search-forward regexp (line-end-position) t)
+           (when (search-forward-regexp regexp (line-end-position) t)
              (setq context (list (match-string 1) (match-string 2)
                                  (match-string 3) (match-string 4))))))
        ;; Return the context.
@@ -714,20 +716,21 @@ connection if a previous connection has died for some 
reason."
   (unless (tramp-connectable-p vec)
     (throw 'non-essential 'non-essential))
 
-  ;; We need a process bound to the connection buffer.  Therefore, we
-  ;; create a dummy process.  Maybe there is a better solution?
-  (unless (tramp-get-connection-process vec)
-    (let ((p (make-network-process
-             :name (tramp-get-connection-name vec)
-             :buffer (tramp-get-connection-buffer vec)
-             :server t :host 'local :service t :noquery t)))
-      (tramp-post-process-creation p vec)
+  (with-tramp-debug-message vec "Opening connection"
+    ;; We need a process bound to the connection buffer.  Therefore,
+    ;; we create a dummy process.  Maybe there is a better solution?
+    (unless (tramp-get-connection-process vec)
+      (let ((p (make-network-process
+               :name (tramp-get-connection-name vec)
+               :buffer (tramp-get-connection-buffer vec)
+               :server t :host 'local :service t :noquery t)))
+       (tramp-post-process-creation p vec)
 
-      ;; Set connection-local variables.
-      (tramp-set-connection-local-variables vec)
+       ;; Set connection-local variables.
+       (tramp-set-connection-local-variables vec)
 
-      ;; Mark it as connected.
-      (tramp-set-connection-property p "connected" t))))
+       ;; Mark it as connected.
+       (tramp-set-connection-property p "connected" t)))))
 
 (defun tramp-sudoedit-send-command (vec &rest args)
   "Send commands ARGS to connection VEC.
@@ -785,7 +788,7 @@ In case there is no valid Lisp expression, it raises an 
error."
       (condition-case nil
          (prog1 (read (current-buffer))
            ;; Error handling.
-           (when (re-search-forward (rx (not blank)) (line-end-position) t)
+           (when (search-forward-regexp (rx (not blank)) (line-end-position) t)
              (error nil)))
        (error (tramp-error
                vec 'file-error
diff --git a/lisp/net/tramp.el b/lisp/net/tramp.el
index 3df306910a9..4b1be4a4d11 100644
--- a/lisp/net/tramp.el
+++ b/lisp/net/tramp.el
@@ -55,6 +55,7 @@
 ;;; Code:
 
 (require 'tramp-compat)
+(require 'tramp-message)
 (require 'tramp-integration)
 (require 'trampver)
 
@@ -92,8 +93,8 @@
   "Edit remote files with a combination of ssh, scp, etc."
   :group 'files
   :group 'comm
-  :link '(custom-manual "(tramp)Top")
-  :version "22.1")
+  :version "22.1"
+  :link '(custom-manual "(tramp)Top"))
 
 ;;;###tramp-autoload
 (progn
@@ -115,32 +116,6 @@
 If it is set to nil, all remote file names are used literally."
   :type 'boolean)
 
-;;;###tramp-autoload
-(defcustom tramp-verbose 3
-  "Verbosity level for Tramp messages.
-Any level x includes messages for all levels 1 .. x-1.  The levels are
-
- 0  silent (no tramp messages at all)
- 1  errors
- 2  warnings
- 3  connection to remote hosts (default level)
- 4  activities
- 5  internal
- 6  sent and received strings
- 7  connection properties
- 8  file caching
- 9  test commands
-10  traces (huge)
-11  call traces (maintainer only)."
-  :type 'integer)
-
-(defcustom tramp-debug-to-file nil
-  "Whether Tramp debug messages shall be saved to file.
-The debug file has the same name as the debug buffer, written to
-`tramp-compat-temporary-file-directory'."
-  :version "28.1"
-  :type 'boolean)
-
 (defcustom tramp-backup-directory-alist nil
   "Alist of filename patterns and backup directory names.
 Each element looks like (REGEXP . DIRECTORY), with the same meaning like
@@ -1272,7 +1247,7 @@ checked via the following code:
             (process-send-eof proc)
             (process-send-eof proc))
           (while (not (progn (goto-char (point-min))
-                             (re-search-forward \"\\\\w+\" (point-max) t)))
+                             (search-forward-regexp \"\\\\w+\" (point-max) t)))
             (accept-process-output proc 1))
           (when (process-live-p proc)
             (setq received (string-to-number (match-string 0)))
@@ -1402,12 +1377,12 @@ The TERM environment variable should be set via 
`tramp-terminal-type'.
 
 The INSIDE_EMACS environment variable will automatically be set
 based on the Tramp and Emacs versions, and should not be set here."
-  :group 'tramp
   :version "26.1"
   :type '(repeat string))
 
 ;;; Internal Variables:
 
+;;;###tramp-autoload
 (defvar tramp-current-connection nil
   "Last connection timestamp.
 It is a cons cell of the actual `tramp-file-name-structure', and
@@ -1478,6 +1453,7 @@ calling HANDLER.")
   (make-tramp-file-name :user (user-login-name) :host tramp-system-name)
 "Connection hop which identifies the virtual hop before the first one.")
 
+;;;###tramp-autoload
 (defun tramp-file-name-user-domain (vec)
   "Return user and domain components of VEC."
   (when (or (tramp-file-name-user vec) (tramp-file-name-domain vec))
@@ -1488,6 +1464,7 @@ calling HANDLER.")
 
 (put #'tramp-file-name-user-domain 'tramp-suppress-trace t)
 
+;;;###tramp-autoload
 (defun tramp-file-name-host-port (vec)
   "Return host and port components of VEC."
   (when (or (tramp-file-name-host vec) (tramp-file-name-port vec))
@@ -1960,371 +1937,6 @@ of `current-buffer'."
          buffer (current-buffer))
     (substring-no-properties (buffer-string))))
 
-(defun tramp-debug-buffer-name (vec)
-  "A name for the debug buffer for VEC."
-  (let ((method (tramp-file-name-method vec))
-       (user-domain (tramp-file-name-user-domain vec))
-       (host-port (tramp-file-name-host-port vec)))
-    (if (tramp-string-empty-or-nil-p user-domain)
-       (format "*debug tramp/%s %s*" method host-port)
-      (format "*debug tramp/%s %s@%s*" method user-domain host-port))))
-
-(put #'tramp-debug-buffer-name 'tramp-suppress-trace t)
-
-(defconst tramp-debug-outline-regexp
-  (rx ;; Timestamp.
-      (+ digit) ":" (+ digit) ":" (+ digit) "." (+ digit) blank
-      ;; Thread.
-      (? (group "#<thread " (+ nonl) ">") blank)
-      ;; Function name, verbosity.
-      (+ (any "-" alnum)) " (" (group (+ digit)) ") #")
-  "Used for highlighting Tramp debug buffers in `outline-mode'.")
-
-(defconst tramp-debug-font-lock-keywords
-  ;; FIXME: Make it a function instead of an ELisp expression, so you
-  ;; can evaluate it with `funcall' rather than `eval'!
-  ;; Also, in `font-lock-defaults' you can specify a function name for
-  ;; the "KEYWORDS" part, so font-lock calls it to get the actual keywords!
-  '(list
-    (rx bol (regexp tramp-debug-outline-regexp) (+ nonl))
-    '(1 font-lock-warning-face t t)
-    '(0 (outline-font-lock-face) keep t))
-  "Used for highlighting Tramp debug buffers in `outline-mode'.")
-
-(defun tramp-debug-outline-level ()
-  "Return the depth to which a statement is nested in the outline.
-Point must be at the beginning of a header line.
-
-The outline level is equal to the verbosity of the Tramp message."
-  (1+ (string-to-number (match-string 2))))
-
-(put #'tramp-debug-outline-level 'tramp-suppress-trace t)
-
-;; This function takes action since Emacs 28.1, when
-;; `read-extended-command-predicate' is set to
-;; `command-completion-default-include-p'.
-(defun tramp-debug-buffer-command-completion-p (_symbol buffer)
-  "A predicate for Tramp interactive commands.
-They are completed by \"M-x TAB\" only in Tramp debug buffers."
-  (with-current-buffer buffer
-    (string-equal
-     (buffer-substring (point-min) (min (+ (point-min) 10) (point-max)))
-     ";; Emacs:")))
-
-(put #'tramp-debug-buffer-command-completion-p 'tramp-suppress-trace t)
-
-(defun tramp-setup-debug-buffer ()
-  "Function to setup debug buffers."
-  ;; (declare (completion tramp-debug-buffer-command-completion-p))
-  (interactive)
-  (set-buffer-file-coding-system 'utf-8)
-  (setq buffer-undo-list t)
-  ;; Activate `outline-mode'.  This runs `text-mode-hook' and
-  ;; `outline-mode-hook'.  We must prevent that local processes die.
-  ;; Yes: I've seen `flyspell-mode', which starts "ispell".
-  ;; `(custom-declare-variable outline-minor-mode-prefix ...)'  raises
-  ;; on error in `(outline-mode)', we don't want to see it in the
-  ;; traces.
-  (let ((default-directory tramp-compat-temporary-file-directory))
-    (outline-mode))
-  (setq-local outline-level 'tramp-debug-outline-level)
-  (setq-local font-lock-keywords
-              ;; FIXME: This `(t FOO . BAR)' representation in
-              ;; `font-lock-keywords' is supposed to be an internal
-              ;; implementation "detail".  Don't abuse it here!
-              `(t (eval ,tramp-debug-font-lock-keywords t)
-                  ,(eval tramp-debug-font-lock-keywords t)))
-  ;; Do not edit the debug buffer.
-  (use-local-map special-mode-map)
-  (set-buffer-modified-p nil)
-  ;; For debugging purposes.
-  (local-set-key "\M-n" 'clone-buffer)
-  (add-hook 'clone-buffer-hook #'tramp-setup-debug-buffer nil 'local))
-
-(put #'tramp-setup-debug-buffer 'tramp-suppress-trace t)
-
-(function-put
- #'tramp-setup-debug-buffer 'completion-predicate
- #'tramp-debug-buffer-command-completion-p)
-
-(defun tramp-get-debug-buffer (vec)
-  "Get the debug buffer for VEC."
-  (with-current-buffer (get-buffer-create (tramp-debug-buffer-name vec))
-    (when (bobp)
-      (tramp-setup-debug-buffer))
-    (current-buffer)))
-
-(put #'tramp-get-debug-buffer 'tramp-suppress-trace t)
-
-(defun tramp-get-debug-file-name (vec)
-  "Get the debug file name for VEC."
-  (expand-file-name
-   (tramp-compat-string-replace "/" " " (tramp-debug-buffer-name vec))
-   tramp-compat-temporary-file-directory))
-
-(put #'tramp-get-debug-file-name 'tramp-suppress-trace t)
-
-(defun tramp-trace-buffer-name (vec)
-  "A name for the trace buffer for VEC."
-  (tramp-compat-string-replace "debug" "trace" (tramp-debug-buffer-name vec)))
-
-(put #'tramp-trace-buffer-name 'tramp-suppress-trace t)
-
-(defvar tramp-trace-functions nil
-  "A list of non-Tramp functions to be traced with `tramp-verbose' > 10.")
-
-;;;###tramp-autoload
-(defun tramp-debug-message (vec fmt-string &rest arguments)
-  "Append message to debug buffer of VEC.
-Message is formatted with FMT-STRING as control string and the remaining
-ARGUMENTS to actually emit the message (if applicable)."
-  (let ((inhibit-message t)
-       create-lockfiles file-name-handler-alist message-log-max
-       signal-hook-function)
-    (with-current-buffer (tramp-get-debug-buffer vec)
-      (goto-char (point-max))
-      (let ((point (point)))
-       (when (bobp)
-         ;; Headline.
-         (insert
-          (format
-           ";; Emacs: %s Tramp: %s -*- mode: outline; coding: utf-8; -*-"
-           emacs-version tramp-version))
-         (when (>= tramp-verbose 10)
-           (let ((tramp-verbose 0))
-             (insert
-              (format
-               "\n;; Location: %s Git: %s/%s"
-               (locate-library "tramp")
-               (or tramp-repository-branch "")
-               (or tramp-repository-version "")))))
-         ;; Traces.
-         (when (>= tramp-verbose 11)
-           (dolist
-               (elt
-                (append
-                 (mapcar
-                  #'intern (all-completions "tramp-" obarray #'functionp))
-                 tramp-trace-functions))
-             (unless (get elt 'tramp-suppress-trace)
-               (trace-function-background elt))))
-         ;; Delete debug file.
-         (when (and tramp-debug-to-file (tramp-get-debug-file-name vec))
-           (ignore-errors (delete-file (tramp-get-debug-file-name vec)))))
-       (unless (bolp)
-         (insert "\n"))
-       ;; Timestamp.
-       (insert (format-time-string "%T.%6N "))
-       ;; Threads.  `current-thread' might not exist when Emacs is
-       ;; configured --without-threads.
-       ;; (unless (eq (tramp-compat-funcall 'current-thread) main-thread)
-       ;;   (insert (format "%s " (tramp-compat-funcall 'current-thread))))
-       ;; Calling Tramp function.  We suppress compat and trace
-       ;; functions from being displayed.
-       (let ((frames (backtrace-frames))
-             btf fn)
-         (while (not fn)
-           (setq btf (cadadr frames))
-           (if (not btf)
-               (setq fn "")
-             (and (symbolp btf) (setq fn (symbol-name btf))
-                  (or (not (string-prefix-p "tramp" fn))
-                      (get btf 'tramp-suppress-trace))
-                  (setq fn nil))
-             (setq frames (cdr frames))))
-         ;; The following code inserts filename and line number.
-         ;; Should be inactive by default, because it is time consuming.
-         ;; (let ((ffn (find-function-noselect (intern fn))))
-         ;;   (insert
-         ;;    (format
-         ;;     "%s:%d: "
-         ;;     (file-name-nondirectory (buffer-file-name (car ffn)))
-         ;;     (with-current-buffer (car ffn)
-         ;;       (1+ (count-lines (point-min) (cdr ffn)))))))
-         (insert (format "%s " fn)))
-       ;; The message.
-       (insert (apply #'format-message fmt-string arguments))
-       ;; Write message to debug file.
-       (when tramp-debug-to-file
-         (ignore-errors
-           (write-region
-            point (point-max) (tramp-get-debug-file-name vec) 'append)))))))
-
-(put #'tramp-debug-message 'tramp-suppress-trace t)
-
-;;;###tramp-autoload
-(defvar tramp-inhibit-progress-reporter nil
-  "Show Tramp progress reporter in the minibuffer.
-This variable is used to disable concurrent progress reporter messages.")
-
-;;;###tramp-autoload
-(defsubst tramp-message (vec-or-proc level fmt-string &rest arguments)
-  "Emit a message depending on verbosity level.
-VEC-OR-PROC identifies the Tramp buffer to use.  It can be either a
-vector or a process.  LEVEL says to be quiet if `tramp-verbose' is
-less than LEVEL.  The message is emitted only if `tramp-verbose' is
-greater than or equal to LEVEL.
-
-The message is also logged into the debug buffer when `tramp-verbose'
-is greater than or equal 4.
-
-Calls functions `message' and `tramp-debug-message' with FMT-STRING as
-control string and the remaining ARGUMENTS to actually emit the message (if
-applicable)."
-  (ignore-errors
-    (when (<= level tramp-verbose)
-      ;; Display only when there is a minimum level, and the progress
-      ;; reporter doesn't suppress further messages.
-      (when (and (<= level 3) (null tramp-inhibit-progress-reporter))
-       (apply #'message
-              (concat
-               (cond
-                ((= level 0) "")
-                ((= level 1) "")
-                ((= level 2) "Warning: ")
-                (t           "Tramp: "))
-               fmt-string)
-              arguments))
-      ;; Log only when there is a minimum level.
-      (when (>= tramp-verbose 4)
-       (let ((tramp-verbose 0))
-         ;; Append connection buffer for error messages, if exists.
-         (when (= level 1)
-           (ignore-errors
-             (setq fmt-string (concat fmt-string "\n%s")
-                   arguments
-                   (append
-                    arguments
-                    `(,(tramp-get-buffer-string
-                        (if (processp vec-or-proc)
-                            (process-buffer vec-or-proc)
-                          (tramp-get-connection-buffer
-                           vec-or-proc 'dont-create))))))))
-         ;; Translate proc to vec.
-         (when (processp vec-or-proc)
-           (setq vec-or-proc (process-get vec-or-proc 'tramp-vector))))
-       ;; Do it.
-       (when (tramp-file-name-p vec-or-proc)
-         (apply #'tramp-debug-message
-                vec-or-proc
-                (concat (format "(%d) # " level) fmt-string)
-                arguments))))))
-
-(defsubst tramp-backtrace (&optional vec-or-proc force)
-  "Dump a backtrace into the debug buffer.
-If VEC-OR-PROC is nil, the buffer *debug tramp* is used.  FORCE
-forces the backtrace even if `tramp-verbose' is less than 10.
-This function is meant for debugging purposes."
-  (let ((tramp-verbose (if force 10 tramp-verbose)))
-    (when (>= tramp-verbose 10)
-      (if vec-or-proc
-         (tramp-message
-          vec-or-proc 10 "\n%s" (with-output-to-string (backtrace)))
-       (with-output-to-temp-buffer "*debug tramp*" (backtrace))))))
-
-(defun tramp-error (vec-or-proc signal fmt-string &rest arguments)
-  "Emit an error.
-VEC-OR-PROC identifies the connection to use, SIGNAL is the
-signal identifier to be raised, remaining arguments passed to
-`tramp-message'.  Finally, signal SIGNAL is raised with
-FMT-STRING and ARGUMENTS."
-  (let (signal-hook-function)
-    (tramp-backtrace vec-or-proc)
-    (unless arguments
-      ;; FMT-STRING could be just a file name, as in
-      ;; `file-already-exists' errors.  It could contain the ?\%
-      ;; character, as in smb domain spec.
-      (setq arguments (list fmt-string)
-           fmt-string "%s"))
-    (when vec-or-proc
-      (tramp-message
-       vec-or-proc 1 "%s"
-       (error-message-string
-       (list signal
-             (get signal 'error-message)
-             (apply #'format-message fmt-string arguments)))))
-    (signal signal (list (substring-no-properties
-                         (apply #'format-message fmt-string arguments))))))
-
-(put #'tramp-error 'tramp-suppress-trace t)
-
-(defvar tramp-error-show-message-timeout 30
-  "Time to show the Tramp buffer in case of an error.
-If it is bound to nil, the buffer is not shown.  This is used in
-tramp-tests.el.")
-
-(defsubst tramp-error-with-buffer
-  (buf vec-or-proc signal fmt-string &rest arguments)
-  "Emit an error, and show BUF.
-If BUF is nil, show the connection buf.  Wait for 30\", or until
-an input event arrives.  The other arguments are passed to `tramp-error'."
-  (save-window-excursion
-    (let* ((buf (or (and (bufferp buf) buf)
-                   (and (processp vec-or-proc) (process-buffer vec-or-proc))
-                   (and (tramp-file-name-p vec-or-proc)
-                        (tramp-get-connection-buffer vec-or-proc))))
-          (vec (or (and (tramp-file-name-p vec-or-proc) vec-or-proc)
-                   (and buf (tramp-dissect-file-name
-                             (tramp-get-default-directory buf))))))
-      (unwind-protect
-         (apply #'tramp-error vec-or-proc signal fmt-string arguments)
-       ;; Save exit.
-       (when (and buf
-                  (natnump tramp-error-show-message-timeout)
-                  (not (zerop tramp-verbose))
-                  ;; Do not show when flagged from outside.
-                  (not non-essential)
-                  ;; Show only when Emacs has started already.
-                  (current-message))
-         (let ((enable-recursive-minibuffers t)
-               inhibit-message)
-           ;; `tramp-error' does not show messages.  So we must do it
-           ;; ourselves.
-           (apply #'message fmt-string arguments)
-           ;; Show buffer.
-           (pop-to-buffer buf)
-           (discard-input)
-           (sit-for tramp-error-show-message-timeout)))
-       ;; Reset timestamp.  It would be wrong after waiting for a while.
-       (when (tramp-file-name-equal-p vec (car tramp-current-connection))
-         (setcdr tramp-current-connection (current-time)))))))
-
-;; We must make it a defun, because it is used earlier already.
-(defun tramp-user-error (vec-or-proc fmt-string &rest arguments)
-  "Signal a user error (or \"pilot error\")."
-  (unwind-protect
-      (apply #'tramp-error vec-or-proc 'user-error fmt-string arguments)
-    ;; Save exit.
-    (when (and (natnump tramp-error-show-message-timeout)
-              (not (zerop tramp-verbose))
-              ;; Do not show when flagged from outside.
-              (not non-essential)
-              ;; Show only when Emacs has started already.
-              (current-message))
-      (let ((enable-recursive-minibuffers t)
-           inhibit-message)
-       ;; `tramp-error' does not show messages.  So we must do it ourselves.
-       (apply #'message fmt-string arguments)
-       (discard-input)
-       (sit-for tramp-error-show-message-timeout)
-       ;; Reset timestamp.  It would be wrong after waiting for a while.
-       (when
-           (tramp-file-name-equal-p vec-or-proc (car tramp-current-connection))
-         (setcdr tramp-current-connection (current-time)))))))
-
-(put #'tramp-user-error 'tramp-suppress-trace t)
-
-(defmacro tramp-with-demoted-errors (vec-or-proc format &rest body)
-  "Execute BODY while redirecting the error message to `tramp-message'.
-BODY is executed like wrapped by `with-demoted-errors'.  FORMAT
-is a format-string containing a %-sequence meaning to substitute
-the resulting error message."
-  (declare (indent 2) (debug (symbolp form body)))
-  (let ((err (make-symbol "err")))
-    `(condition-case-unless-debug ,err
-         (progn ,@body)
-       (error (tramp-message ,vec-or-proc 3 ,format ,err) nil))))
-
 ;; This macro shall optimize the cases where a `file-exists-p' call is
 ;; invoked first.  Often, the file exists, so the remote command is
 ;; superfluous.
@@ -2407,6 +2019,11 @@ If VAR is nil, then we bind `v' to the structure and 
`method', `user',
     (when (tramp-compat-string-search message (or (current-message) ""))
       (progress-reporter-update reporter value suffix))))
 
+;;;###tramp-autoload
+(defvar tramp-inhibit-progress-reporter nil
+  "Show Tramp progress reporter in the minibuffer.
+This variable is used to disable concurrent progress reporter messages.")
+
 (defmacro with-tramp-progress-reporter (vec level message &rest body)
   "Execute BODY, spinning a progress reporter with MESSAGE in interactive mode.
 If LEVEL does not fit for visible messages, there are only traces
@@ -2767,22 +2384,20 @@ Fall back to normal file name handler if no Tramp file 
name handler exists."
                                   tramp-compat-temporary-file-directory)
                                file-name-handler-alist)
                            (autoload-do-load sf foreign)))
-                        ;; (tramp-message
-                        ;;  v 4 "Running `%s'..." (cons operation args))
-                        ;; If `non-essential' is non-nil, Tramp shall
-                       ;; not open a new connection.
-                       ;; If Tramp detects that it shouldn't continue
-                       ;; to work, it throws the `suppress' event.
-                       ;; This could happen for example, when Tramp
-                       ;; tries to open the same connection twice in
-                       ;; a short time frame.
-                       ;; In both cases, we try the default handler then.
-                       (setq result
-                             (catch 'non-essential
-                               (catch 'suppress
-                                 (apply foreign operation args))))
-                        ;; (tramp-message
-                        ;;  v 4 "Running `%s'...`%s'" (cons operation args) 
result)
+                       (with-tramp-debug-message
+                           v (format "Running `%S'" (cons operation args))
+                          ;; If `non-essential' is non-nil, Tramp shall
+                         ;; not open a new connection.
+                         ;; If Tramp detects that it shouldn't continue
+                         ;; to work, it throws the `suppress' event.
+                         ;; This could happen for example, when Tramp
+                         ;; tries to open the same connection twice in
+                         ;; a short time frame.
+                         ;; In both cases, we try the default handler then.
+                         (setq result
+                               (catch 'non-essential
+                                 (catch 'suppress
+                                   (apply foreign operation args)))))
                        (cond
                         ((eq result 'non-essential)
                          (tramp-message
@@ -3383,7 +2998,7 @@ for all methods.  Resulting data are derived from default 
settings."
    "Return a (user host) tuple allowed to access.
 User is always nil."
    (let (result)
-     (when (re-search-forward regexp (line-end-position) t)
+     (when (search-forward-regexp regexp (line-end-position) t)
        (setq result (list nil (match-string match-level))))
      (or
       (> (skip-chars-forward skip-chars) 0)
@@ -3416,7 +3031,7 @@ Either user or host may be nil."
          (rx
           bol (group (regexp tramp-host-regexp))
           (? (+ blank) (group (regexp tramp-user-regexp))))))
-     (when (re-search-forward regexp (line-end-position) t)
+     (when (search-forward-regexp regexp (line-end-position) t)
        (setq result (append (list (match-string 2) (match-string 1)))))
      (forward-line 1)
      result))
@@ -3504,7 +3119,7 @@ Host is always \"localhost\"."
 Host is always \"localhost\"."
    (let (result
         (regexp (rx bol (group (regexp tramp-user-regexp)) ":")))
-     (when (re-search-forward regexp (line-end-position) t)
+     (when (search-forward-regexp regexp (line-end-position) t)
        (setq result (list (match-string 1) "localhost")))
      (forward-line 1)
      result))
@@ -3561,7 +3176,7 @@ User is always nil."
 User is always nil."
   (let (result
        (regexp (rx (literal registry) "\\" (group (+ nonl)))))
-    (when (re-search-forward regexp (line-end-position) t)
+    (when (search-forward-regexp regexp (line-end-position) t)
       (setq result (list nil (match-string 1))))
     (forward-line 1)
     result))
@@ -5058,7 +4673,8 @@ a connection-local variable."
   (process-put proc 'adjust-window-size-function #'ignore)
   (set-process-query-on-exit-flag proc nil)
   (tramp-taint-remote-process-buffer (process-buffer proc))
-  (tramp-message vec 6 "%s" (string-join (process-command proc) " ")))
+  (when (process-command proc)
+    (tramp-message vec 6 "%s" (string-join (process-command proc) " "))))
 
 (put #'tramp-post-process-creation 'tramp-suppress-trace t)
 
@@ -5245,25 +4861,25 @@ support symbolic links."
        ((zerop (process-file "cat" nil '(t) nil "/proc/meminfo"))
         (goto-char (point-min))
         (when
-            (re-search-forward
+            (search-forward-regexp
              (rx bol "MemTotal:" (* space) (group (+ digit)) (* space) "kB" 
eol)
              nil 'noerror)
           (setcar (nthcdr 0 result) (string-to-number (match-string 1))))
         (goto-char (point-min))
         (when
-            (re-search-forward
+            (search-forward-regexp
              (rx bol "MemFree:" (* space) (group (+ digit)) (* space) "kB" eol)
              nil 'noerror)
           (setcar (nthcdr 1 result) (string-to-number (match-string 1))))
         (goto-char (point-min))
         (when
-            (re-search-forward
+            (search-forward-regexp
              (rx bol "SwapTotal:" (* space) (group (+ digit)) (* space) "kB" 
eol)
              nil 'noerror)
           (setcar (nthcdr 2 result) (string-to-number (match-string 1))))
         (goto-char (point-min))
         (when
-            (re-search-forward
+            (search-forward-regexp
              (rx bol "SwapFree:" (* space) (group (+ digit)) (* space) "kB" 
eol)
              nil 'noerror)
           (setcar (nthcdr 3 result) (string-to-number (match-string 1)))))
@@ -5273,13 +4889,13 @@ support symbolic links."
        ((zerop (process-file "sysctl" nil '(t) nil "-a"))
         (goto-char (point-min))
         (when
-            (re-search-forward
+            (search-forward-regexp
              (rx bol "hw.pagesize:" (* space) (group (+ digit)) eol)
              nil 'noerror)
           (let ((pagesize (string-to-number (match-string 1))))
             (goto-char (point-min))
             (when
-                (re-search-forward
+                (search-forward-regexp
                  (rx bol "vm.stats.vm.v_page_count:" (* space)
                      (group (+ digit)) eol)
                  nil 'noerror)
@@ -5288,7 +4904,7 @@ support symbolic links."
                (/ (* (string-to-number (match-string 1)) pagesize) 1024)))
             (goto-char (point-min))
             (when
-                (re-search-forward
+                (search-forward-regexp
                  (rx bol "vm.stats.vm.v_free_count:" (* space)
                      (group (+ digit)) eol)
                  nil 'noerror)
@@ -5299,7 +4915,7 @@ support symbolic links."
         (when (zerop (process-file "swapctl" nil '(t) nil "-sk"))
           (goto-char (point-min))
           (when
-              (re-search-forward
+              (search-forward-regexp
                (rx bol "Total:" (* space)
                    (group (+ digit)) (* space) (group (+ digit)) eol)
                nil 'noerror)
@@ -5790,7 +5406,7 @@ Wait, until the connection buffer changes."
         ;; This can be ignored.
         (with-current-buffer (process-buffer proc)
           (goto-char (point-min))
-          (if (re-search-forward tramp-operation-not-permitted-regexp nil t)
+          (if (search-forward-regexp tramp-operation-not-permitted-regexp nil 
t)
               (progn
                 (tramp-message vec 5 "'set mode' error ignored.")
                 (tramp-message vec 3 "Process has finished.")
@@ -5813,7 +5429,7 @@ See `tramp-process-actions' for the format of ACTIONS."
       ;; Remove ANSI control escape sequences.
       (with-current-buffer (tramp-get-connection-buffer vec)
        (goto-char (point-min))
-       (while (re-search-forward ansi-color-control-seq-regexp nil t)
+       (while (search-forward-regexp ansi-color-control-seq-regexp nil t)
          (replace-match "")))
       (setq todo actions)
       (while todo
@@ -5968,7 +5584,7 @@ Otherwise, return nil."
   ;; We restrict ourselves to the last 256 characters.  There were
   ;; reports of a shell command "git ls-files -zco --exclude-standard"
   ;; with 85k files involved, which has blocked Tramp forever.
-  (re-search-backward regexp (max (point-min) (- (point) 256)) 'noerror))
+  (search-backward-regexp regexp (max (point-min) (- (point) 256)) 'noerror))
 
 (defun tramp-check-for-regexp (proc regexp)
   "Check, whether REGEXP is contained in process buffer of PROC.
@@ -5980,12 +5596,12 @@ Erase echoed commands if exists."
     ;; the echo mark regexp is taken for search.  We restrict the
     ;; search for the second echo mark to PIPE_BUF characters.
     (when (and (tramp-get-connection-property proc "check-remote-echo")
-              (re-search-forward
+              (search-forward-regexp
                tramp-echoed-echo-mark-regexp
                (+ (point) (* 5 tramp-echo-mark-marker-length)) t))
       (let ((begin (match-beginning 0)))
        (when
-           (re-search-forward
+           (search-forward-regexp
             tramp-echoed-echo-mark-regexp
             (+ (point) (tramp-get-connection-property proc "pipe-buf" 4096)) t)
          ;; Discard echo from remote output.
@@ -6497,19 +6113,19 @@ Set connection properties 
\"{uid,gid,groups}-{integer,string}\"."
          groups-integer groups-string)
       (goto-char (point-min))
       ;; Read uid.
-      (when (re-search-forward
+      (when (search-forward-regexp
             (rx "uid=" (group (+ digit)) "(" (group (+ (any "_" word))) ")")
             nil 'noerror)
        (setq uid-integer (string-to-number (match-string 1))
              uid-string (match-string 2)))
       ;; Read gid.
-      (when (re-search-forward
+      (when (search-forward-regexp
             (rx "gid=" (group (+ digit)) "(" (group (+ (any "_" word))) ")")
             nil 'noerror)
        (setq gid-integer (string-to-number (match-string 1))
              gid-string (match-string 2)))
       ;; Read groups.
-      (when (re-search-forward (rx "groups=") nil 'noerror)
+      (when (search-forward-regexp (rx "groups=") nil 'noerror)
        (while (looking-at
                (rx (group (+ digit)) "(" (group (+ (any "_" word))) ")"))
          (setq groups-integer (cons (string-to-number (match-string 1))
diff --git a/lisp/net/trampver.el b/lisp/net/trampver.el
index ad7bf94cdcd..4d56cf367e3 100644
--- a/lisp/net/trampver.el
+++ b/lisp/net/trampver.el
@@ -47,6 +47,7 @@
 (defconst tramp-bug-report-address "tramp-devel@gnu.org"
   "Email address to send bug reports to.")
 
+;;;###tramp-autoload
 (defconst tramp-repository-branch
   (ignore-errors
     ;; Suppress message from `emacs-repository-get-branch'.  We must
@@ -60,6 +61,7 @@
           (emacs-repository-get-branch dir))))
   "The repository branch of the Tramp sources.")
 
+;;;###tramp-autoload
 (defconst tramp-repository-version
   (ignore-errors
     ;; Suppress message from `emacs-repository-get-version'.  We must
diff --git a/test/lisp/net/tramp-tests.el b/test/lisp/net/tramp-tests.el
index 9bc8ad8ce39..ee9c09df9d8 100644
--- a/test/lisp/net/tramp-tests.el
+++ b/test/lisp/net/tramp-tests.el
@@ -263,7 +263,6 @@ is greater than 10.
 `should-error' is not handled properly.  BODY shall not contain a timeout."
   (declare (indent 1) (debug (natnump body)))
   `(let* ((tramp-verbose (max (or ,verbose 0) (or tramp-verbose 0)))
-         (trace-buffer (tramp-trace-buffer-name tramp-test-vec))
          (debug-ignored-errors
           (append
            '("^make-symbolic-link not supported$"
@@ -3502,14 +3501,14 @@ This tests also `file-directory-p' and 
`file-accessible-directory-p'."
                        "tramp-test*" ert-remote-temporary-file-directory)))
              (goto-char (point-min))
              (should
-              (re-search-forward
+              (search-forward-regexp
                (rx
                 (literal
                  (file-relative-name
                   tmp-name1 ert-remote-temporary-file-directory)))))
              (goto-char (point-min))
              (should
-              (re-search-forward
+              (search-forward-regexp
                (rx
                 (literal
                  (file-relative-name
@@ -3524,14 +3523,14 @@ This tests also `file-directory-p' and 
`file-accessible-directory-p'."
                        "tramp-test*/*" ert-remote-temporary-file-directory)))
              (goto-char (point-min))
              (should
-              (re-search-forward
+              (search-forward-regexp
                (rx
                 (literal
                  (file-relative-name
                   tmp-name3 ert-remote-temporary-file-directory)))))
              (goto-char (point-min))
              (should
-              (re-search-forward
+              (search-forward-regexp
                (rx
                 (literal
                  (file-relative-name
@@ -3554,14 +3553,14 @@ This tests also `file-directory-p' and 
`file-accessible-directory-p'."
                        "tramp-test*/*" ert-remote-temporary-file-directory)))
              (goto-char (point-min))
              (should
-              (re-search-forward
+              (search-forward-regexp
                (rx
                 (literal
                  (file-relative-name
                   tmp-name3 ert-remote-temporary-file-directory)))))
              (goto-char (point-min))
              (should
-              (re-search-forward
+              (search-forward-regexp
                (rx
                 (literal
                  (file-relative-name
@@ -4980,10 +4979,10 @@ This tests also `make-symbolic-link', `file-truename' 
and `add-name-to-file'."
                      ;; We must remove leading `default-directory'.
                      (goto-char (point-min))
                      (let ((inhibit-read-only t))
-                       (while (re-search-forward "//" nil 'noerror)
+                       (while (search-forward-regexp "//" nil 'noerror)
                          (delete-region (line-beginning-position) (point))))
                      (goto-char (point-min))
-                     (re-search-forward
+                     (search-forward-regexp
                       (rx bol (0+ nonl)
                           (any "Pp") "ossible completions"
                           (0+ nonl) eol))
@@ -5095,7 +5094,8 @@ This tests also `make-symbolic-link', `file-truename' and 
`add-name-to-file'."
                    (if (bufferp destination) destination (current-buffer))
                  ;; "ls" could produce colorized output.
                  (goto-char (point-min))
-                 (while (re-search-forward ansi-color-control-seq-regexp nil t)
+                 (while (search-forward-regexp
+                         ansi-color-control-seq-regexp nil t)
                    (replace-match "" nil nil))
                  (should
                   (string-equal (if destination (format "%s\n" fnnd) "")
@@ -5109,7 +5109,8 @@ This tests also `make-symbolic-link', `file-truename' and 
`add-name-to-file'."
                    (if (bufferp destination) destination (current-buffer))
                  ;; "ls" could produce colorized output.
                  (goto-char (point-min))
-                 (while (re-search-forward ansi-color-control-seq-regexp nil t)
+                 (while (search-forward-regexp
+                         ansi-color-control-seq-regexp nil t)
                    (replace-match "" nil nil))
                  (should
                   (string-equal
@@ -5823,7 +5824,7 @@ INPUT, if non-nil, is a string sent to the process."
               (current-buffer))
              ;; "ls" could produce colorized output.
              (goto-char (point-min))
-             (while (re-search-forward ansi-color-control-seq-regexp nil t)
+             (while (search-forward-regexp ansi-color-control-seq-regexp nil t)
                (replace-match "" nil nil))
              (should
               (string-equal
@@ -7374,7 +7375,7 @@ This requires restrictions of file name syntax."
                    (should (zerop (process-file "printenv" nil t nil)))
                    (goto-char (point-min))
                    (should
-                    (re-search-forward
+                    (search-forward-regexp
                      (rx
                       bol (literal envvar)
                       "=" (literal (getenv envvar)) eol))))))))



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