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master 65441a6: Add remote processes to Tramp sshfs method


From: Michael Albinus
Subject: master 65441a6: Add remote processes to Tramp sshfs method
Date: Thu, 11 Mar 2021 11:17:00 -0500 (EST)

branch: master
commit 65441a6fab7a24d2433411119191002cb366c96d
Author: Michael Albinus <michael.albinus@gmx.de>
Commit: Michael Albinus <michael.albinus@gmx.de>

    Add remote processes to Tramp sshfs method
    
    * doc/misc/tramp.texi (FUSE setup): Method sshfs supports also
    remote processes.
    
    * lisp/net/tramp-cache.el (tramp-get-file-property)
    (tramp-set-file-property): Move setting of
    `tramp-cache-unload-hook' out of function.
    
    * lisp/net/tramp.el (tramp-expand-args): New defun.
    (tramp-handle-make-process):
    * lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file-out-of-band)
    (tramp-maybe-open-connection):
    * lisp/net/tramp-sshfs.el (tramp-sshfs-maybe-open-connection):
    * lisp/net/tramp-sudoedit.el (tramp-sudoedit-send-command): Use it.
    
    * lisp/net/tramp-sshfs.el (tramp-methods) <sshfs>:
    Adapt `tramp-mount-args'.  Add `tramp-login-args',
    `tramp-direct-async', `tramp-remote-shell',
    `tramp-remote-shell-login' and `tramp-remote-shell-args'.
    (tramp-connection-properties): Set "direct-async-process" fir sshfs.
    (tramp-sshfs-file-name-handler-alist): Add `exec-path',
    `make-process', `process-file', `set-file-modes', `shell-command',
    `start-file-process', `tramp-get-remote-gid',
    `tramp-get-remote-uid' and `tramp-set-file-uid-gid'.
    (tramp-sshfs-handle-exec-path, tramp-sshfs-handle-process-file)
    (tramp-sshfs-handle-set-file-modes): New defuns.
    
    * test/lisp/net/tramp-tests.el (tramp-test20-file-modes)
    (tramp-test28-process-file, tramp-test29-start-file-process)
    (tramp-test30-make-process, tramp-test32-shell-command)
    (tramp-test32-shell-command-dont-erase-buffer)
    (tramp-test34-explicit-shell-file-name, tramp-test35-exec-path)
    (tramp-test43-asynchronous-requests): Run also for tramp-sshfs.
    (tramp--test-shell-file-name): New defun.
    (tramp-test28-process-file)
    (tramp-test34-explicit-shell-file-name)
    (tramp-test43-asynchronous-requests): Use it.
    (tramp-test40-special-characters-with-stat)
    (tramp-test40-special-characters-with-perl)
    (tramp-test40-special-characters-with-ls)
    (tramp-test41-utf8-with-stat, tramp-test41-utf8-with-perl)
    (tramp-test41-utf8-with-ls): Remove superfluous skip.
---
 doc/misc/tramp.texi          |  11 ++--
 lisp/net/tramp-cache.el      |  22 +++++---
 lisp/net/tramp-sh.el         | 128 ++++++++++++++++---------------------------
 lisp/net/tramp-sshfs.el      | 117 +++++++++++++++++++++++++++------------
 lisp/net/tramp-sudoedit.el   |  22 +++-----
 lisp/net/tramp.el            |  57 ++++++++++---------
 test/lisp/net/tramp-tests.el |  68 +++++++++++------------
 7 files changed, 226 insertions(+), 199 deletions(-)

diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index 5958162..e5e15cd 100644
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -2648,11 +2648,14 @@ visibility of files.
 @subsection @option{sshfs} setup
 @cindex sshfs setup
 
-The method @option{sshfs} declares only the mount arguments, passed to
-the @command{sshfs} command.  This is a list of list of strings, and
-can be overwritten by the connection property @t{"mount-args"},
-@xref{Predefined connection information}.
+The method @option{sshfs} declares the mount arguments in the variable
+@code{tramp-methods}, passed to the @command{sshfs} command.  This is
+a list of list of strings, and can be overwritten by the connection
+property @t{"mount-args"}, @xref{Predefined connection information}.
 
+Additionally. it declares also the arguments for running remote
+processes, using the @command{ssh} command.  These don't need to be
+changed.
 
 @node Android shell setup
 @section Android shell setup hints
diff --git a/lisp/net/tramp-cache.el b/lisp/net/tramp-cache.el
index c79a3a0..2fcb7b1 100644
--- a/lisp/net/tramp-cache.el
+++ b/lisp/net/tramp-cache.el
@@ -162,17 +162,20 @@ Return DEFAULT if not set."
     (tramp-message
      key 8 "%s %s %s; inhibit: %s; cache used: %s; cached at: %s"
      file property value remote-file-name-inhibit-cache cache-used cached-at)
+    ;; For analysis purposes, count the number of getting this file attribute.
     (when (>= tramp-verbose 10)
       (let* ((var (intern (concat "tramp-cache-get-count-" property)))
             (val (or (and (boundp var) (numberp (symbol-value var))
                           (symbol-value var))
-                     (progn
-                       (add-hook 'tramp-cache-unload-hook
-                                 (lambda () (makunbound var)))
-                       0))))
+                     0)))
        (set var (1+ val))))
     value))
 
+(add-hook 'tramp-cache-unload-hook
+         (lambda ()
+           (dolist (var (all-completions "tramp-cache-get-count-" obarray))
+             (unintern var obarray))))
+
 ;;;###tramp-autoload
 (defun tramp-set-file-property (key file property value)
   "Set the PROPERTY of FILE to VALUE, in the cache context of KEY.
@@ -187,17 +190,20 @@ Return VALUE."
     ;; We put the timestamp there.
     (puthash property (cons (current-time) value) hash)
     (tramp-message key 8 "%s %s %s" file property value)
+    ;; For analysis purposes, count the number of setting this file attribute.
     (when (>= tramp-verbose 10)
       (let* ((var (intern (concat "tramp-cache-set-count-" property)))
             (val (or (and (boundp var) (numberp (symbol-value var))
                           (symbol-value var))
-                     (progn
-                       (add-hook 'tramp-cache-unload-hook
-                                 (lambda () (makunbound var)))
-                       0))))
+                     0)))
        (set var (1+ val))))
     value))
 
+(add-hook 'tramp-cache-unload-hook
+         (lambda ()
+           (dolist (var (all-completions "tramp-cache-set-count-" obarray))
+             (unintern var obarray))))
+
 ;;;###tramp-autoload
 (defun tramp-flush-file-property (key file property)
   "Remove PROPERTY of FILE in the cache context of KEY."
diff --git a/lisp/net/tramp-sh.el b/lisp/net/tramp-sh.el
index 7f6ecc6..14abf55 100644
--- a/lisp/net/tramp-sh.el
+++ b/lisp/net/tramp-sh.el
@@ -2370,53 +2370,29 @@ The method used must be an out-of-band method."
            (setq listener (number-to-string (+ 50000 (random 10000))))))
 
        ;; Compose copy command.
-       (setq host (or host "")
-             user (or user "")
-             port (or port "")
-             spec (format-spec-make
-                   ?t (tramp-get-connection-property
-                       (tramp-get-connection-process v) "temp-file" ""))
-             options (format-spec (tramp-ssh-controlmaster-options v) spec)
-             spec (format-spec-make
-                   ?h host ?u user ?p port ?r listener ?c options
-                   ?k (if keep-date " " "")
+       (setq options
+             (format-spec
+              (tramp-ssh-controlmaster-options v)
+              (format-spec-make
+               ?t (tramp-get-connection-property
+                   (tramp-get-connection-process v) "temp-file" "")))
+             spec (list
+                   ?h (or host "") ?u (or user "") ?p (or port "")
+                   ?r listener ?c options ?k (if keep-date " " "")
                     ?n (concat "2>" (tramp-get-remote-null-device v)))
              copy-program (tramp-get-method-parameter v 'tramp-copy-program)
              copy-keep-date (tramp-get-method-parameter
                              v 'tramp-copy-keep-date)
-
              copy-args
-             (delete
-              ;; " " has either been a replacement of "%k" (when
-              ;; keep-date argument is non-nil), or a replacement
-              ;; for the whole keep-date sublist.
-              " "
-              (dolist
-                  (x (tramp-get-method-parameter v 'tramp-copy-args) copy-args)
-                (setq copy-args
-                      (append
-                       copy-args
-                       (let ((y (mapcar (lambda (z) (format-spec z spec)) x)))
-                         (unless (member "" y) y))))))
-
-             copy-env
-             (delq
-              nil
-              (mapcar
-               (lambda (x)
-                 (setq x (mapcar (lambda (y) (format-spec y spec)) x))
-                 (unless (member "" x) (string-join x " ")))
-               (tramp-get-method-parameter v 'tramp-copy-env)))
-
+             ;; " " has either been a replacement of "%k" (when
+             ;; keep-date argument is non-nil), or a replacement for
+             ;; the whole keep-date sublist.
+             (delete " " (apply #'tramp-expand-args v 'tramp-copy-args spec))
+             copy-env (apply #'tramp-expand-args v 'tramp-copy-env spec)
              remote-copy-program
-             (tramp-get-method-parameter v 'tramp-remote-copy-program))
-
-       (dolist (x (tramp-get-method-parameter v 'tramp-remote-copy-args))
-         (setq remote-copy-args
-               (append
-                remote-copy-args
-                (let ((y (mapcar (lambda (z) (format-spec z spec)) x)))
-                  (unless (member "" y) y)))))
+             (tramp-get-method-parameter v 'tramp-remote-copy-program)
+             remote-copy-args
+             (apply #'tramp-expand-args v 'tramp-remote-copy-args spec))
 
        ;; Check for local copy program.
        (unless (executable-find copy-program)
@@ -2462,10 +2438,11 @@ The method used must be an out-of-band method."
                 v "process-name" (buffer-name (current-buffer)))
                (tramp-set-connection-property
                 v "process-buffer" (current-buffer))
-               (while copy-env
+               (when copy-env
                  (tramp-message
-                  orig-vec 6 "%s=\"%s\"" (car copy-env) (cadr copy-env))
-                 (setenv (pop copy-env) (pop copy-env)))
+                  orig-vec 6 "%s=\"%s\""
+                  (car copy-env) (string-join (cdr copy-env) " "))
+                 (setenv (car copy-env) (string-join (cdr copy-env) " ")))
                (setq
                 copy-args
                 (append
@@ -5049,19 +5026,17 @@ connection if a previous connection has died for some 
reason."
                         (l-domain (tramp-file-name-domain hop))
                         (l-host (tramp-file-name-host hop))
                         (l-port (tramp-file-name-port hop))
-                        (login-program
-                         (tramp-get-method-parameter hop 'tramp-login-program))
-                        (login-args
-                         (tramp-get-method-parameter hop 'tramp-login-args))
                         (remote-shell
                          (tramp-get-method-parameter hop 'tramp-remote-shell))
                         (extra-args (tramp-get-sh-extra-args remote-shell))
                         (async-args
-                         (tramp-get-method-parameter hop 'tramp-async-args))
+                         (tramp-compat-flatten-tree
+                          (tramp-get-method-parameter hop 'tramp-async-args)))
                         (connection-timeout
                          (tramp-get-method-parameter
                           hop 'tramp-connection-timeout))
-                        (command login-program)
+                        (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
@@ -5075,11 +5050,7 @@ connection if a previous connection has died for some 
reason."
                          (with-tramp-connection-property
                              (tramp-get-process vec) "temp-file"
                            (tramp-compat-make-temp-name)))
-                        spec r-shell)
-
-                   ;; Add arguments for asynchronous processes.
-                   (when (and process-name async-args)
-                     (setq login-args (append async-args login-args)))
+                        r-shell)
 
                    ;; Check, whether there is a restricted shell.
                    (dolist (elt tramp-restricted-shell-hosts-alist)
@@ -5104,31 +5075,28 @@ connection if a previous connection has died for some 
reason."
 
                    ;; Replace `login-args' place holders.
                    (setq
-                    l-host (or l-host "")
-                    l-user (or l-user "")
-                    l-port (or l-port "")
-                    spec (format-spec-make ?t tmpfile)
-                    options (format-spec options spec)
-                    spec (format-spec-make
-                          ?h l-host ?u l-user ?p l-port ?c options
-                          ?l (concat remote-shell " " extra-args " -i"))
                     command
-                    (concat
-                     ;; We do not want to see the trailing local
-                     ;; prompt in `start-file-process'.
-                     (unless r-shell "exec ")
-                     command " "
-                     (mapconcat
-                      (lambda (x)
-                        (setq x (mapcar (lambda (y) (format-spec y spec)) x))
-                        (unless (member "" x) (string-join x " ")))
-                      login-args " ")
-                     ;; Local shell could be a Windows COMSPEC.  It
-                     ;; doesn't know the ";" syntax, but we must exit
-                     ;; always for `start-file-process'.  It could
-                     ;; also be a restricted shell, which does not
-                     ;; allow "exec".
-                     (when r-shell " && exit || exit")))
+                    (mapconcat
+                     #'identity
+                     (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))
+                       ?l (concat remote-shell " " extra-args " -i"))
+                      ;; Local shell could be a Windows COMSPEC.  It
+                      ;; doesn't know the ";" syntax, but we must
+                      ;; exit always for `start-file-process'.  It
+                      ;; could also be a restricted shell, which does
+                      ;; not allow "exec".
+                      (when r-shell '("&&" "exit" "||" "exit")))
+                     " "))
 
                    ;; Send the command.
                    (tramp-message vec 3 "Sending command `%s'" command)
@@ -5469,7 +5437,7 @@ Nonexistent directories are removed from spec."
                  (progn
                    (tramp-message
                     vec 3
-                   "`getconf PATH' not successful, using default value \"%s\"."
+                    "`getconf PATH' not successful, using default value 
\"%s\"."
                     "/bin:/usr/bin")
                    "/bin:/usr/bin"))))
             (own-remote-path
diff --git a/lisp/net/tramp-sshfs.el b/lisp/net/tramp-sshfs.el
index feb64b8..ce9412c 100644
--- a/lisp/net/tramp-sshfs.el
+++ b/lisp/net/tramp-sshfs.el
@@ -51,9 +51,19 @@
 (tramp--with-startup
  (add-to-list 'tramp-methods
              `(,tramp-sshfs-method
-               (tramp-mount-args
-                (("-p" "%p")
-                 ("-o" "idmap=user,reconnect")))))
+               (tramp-mount-args            (("-C") ("-p" "%p")
+                                             ("-o" "idmap=user,reconnect")))
+               ;; These are for remote processes.
+                (tramp-login-program        "ssh")
+                (tramp-login-args           (("-q")("-l" "%u") ("-p" "%p")
+                                            ("-e" "none") ("%h") ("%l")))
+                (tramp-direct-async         t)
+                (tramp-remote-shell         ,tramp-default-remote-shell)
+                (tramp-remote-shell-login   ("-l"))
+                (tramp-remote-shell-args    ("-c"))))
+
+ (add-to-list 'tramp-connection-properties
+             `(,(format "/%s:" tramp-sshfs-method) "direct-async-process" t))
 
  (tramp-set-completion-function
   tramp-sshfs-method tramp-completion-function-alist-ssh))
@@ -76,7 +86,7 @@
      . tramp-handle-directory-files-and-attributes)
     (dired-compress-file . ignore)
     (dired-uncache . tramp-handle-dired-uncache)
-;;     (exec-path . ignore)
+    (exec-path . tramp-sshfs-handle-exec-path)
     (expand-file-name . tramp-handle-expand-file-name)
     (file-accessible-directory-p . tramp-handle-file-accessible-directory-p)
     (file-acl . ignore)
@@ -117,22 +127,22 @@
     (make-directory . tramp-fuse-handle-make-directory)
     (make-directory-internal . ignore)
     (make-nearby-temp-file . tramp-handle-make-nearby-temp-file)
-;;     (make-process . ignore)
+    (make-process . tramp-handle-make-process)
     (make-symbolic-link . tramp-handle-make-symbolic-link)
-;;     (process-file . ignore)
+    (process-file . tramp-sshfs-handle-process-file)
     (rename-file . tramp-sshfs-handle-rename-file)
     (set-file-acl . ignore)
-    (set-file-modes . ignore)
+    (set-file-modes . tramp-sshfs-handle-set-file-modes)
     (set-file-selinux-context . ignore)
     (set-file-times . ignore)
     (set-visited-file-modtime . tramp-handle-set-visited-file-modtime)
-;;     (shell-command . ignore)
-;;     (start-file-process . ignore)
+    (shell-command . tramp-handle-shell-command)
+    (start-file-process . tramp-handle-start-file-process)
     (substitute-in-file-name . tramp-handle-substitute-in-file-name)
     (temporary-file-directory . tramp-handle-temporary-file-directory)
-;;     (tramp-get-remote-gid . ignore)
-;;     (tramp-get-remote-uid . ignore)
-;;     (tramp-set-file-uid-gid . ignore)
+    (tramp-get-remote-gid . ignore)
+    (tramp-get-remote-uid . ignore)
+    (tramp-set-file-uid-gid . ignore)
     (unhandled-file-name-directory . ignore)
     (vc-registered . ignore)
     (verify-visited-file-modtime . tramp-handle-verify-visited-file-modtime)
@@ -185,6 +195,22 @@ arguments to pass to the OPERATION."
       (with-parsed-tramp-file-name newname nil
        (tramp-flush-file-properties v localname)))))
 
+(defun tramp-sshfs-handle-exec-path ()
+  "Like `exec-path' for Tramp files."
+  (append
+   (with-parsed-tramp-file-name default-directory nil
+     (with-tramp-connection-property (tramp-get-process v) "remote-path"
+       (with-temp-buffer
+        (process-file "getconf" nil t nil "PATH")
+        (split-string
+         (progn
+           ;; Read the expression.
+           (goto-char (point-min))
+           (buffer-substring (point) (point-at-eol)))
+         ":" 'omit))))
+   ;; The equivalent to `exec-directory'.
+   `(,(tramp-file-local-name (expand-file-name default-directory)))))
+
 (defun tramp-sshfs-handle-file-system-info (filename)
   "Like `file-system-info' for Tramp files."
   ;;`file-system-info' exists since Emacs 27.1.
@@ -199,6 +225,34 @@ arguments to pass to the OPERATION."
     (when visit (setq buffer-file-name filename))
     (cons (expand-file-name filename) (cdr result))))
 
+(defun tramp-sshfs-handle-process-file
+  (program &optional infile destination display &rest args)
+  "Like `process-file' for Tramp files."
+  ;; The implementation is not complete yet.
+  (when (and (numberp destination) (zerop destination))
+    (error "Implementation does not handle immediate return"))
+
+  (with-parsed-tramp-file-name default-directory nil
+    (let ((command
+          (format
+           "cd %s && exec %s"
+           localname
+           (mapconcat #'tramp-shell-quote-argument (cons program args) " "))))
+      (unwind-protect
+         (apply
+          #'tramp-call-process
+          v (tramp-get-method-parameter v 'tramp-login-program)
+          infile destination display
+          (tramp-expand-args
+           v 'tramp-login-args
+           ?h (or (tramp-file-name-host v) "")
+           ?u (or (tramp-file-name-user v) "")
+           ?p (or (tramp-file-name-port v) "")
+           ?l command))
+
+       (unless process-file-side-effects
+          (tramp-flush-directory-properties v ""))))))
+
 (defun tramp-sshfs-handle-rename-file
     (filename newname &optional ok-if-already-exists)
   "Like `rename-file' for Tramp files."
@@ -217,6 +271,13 @@ arguments to pass to the OPERATION."
     (with-parsed-tramp-file-name newname nil
       (tramp-flush-file-properties v localname))))
 
+(defun tramp-sshfs-handle-set-file-modes (filename mode &optional flag)
+  "Like `set-file-modes' for Tramp files."
+  (with-parsed-tramp-file-name filename nil
+    (unless (and (eq flag 'nofollow) (file-symlink-p filename))
+      (tramp-flush-file-properties v localname)
+      (set-file-modes (tramp-fuse-local-file-name filename) mode flag))))
+
 (defun tramp-sshfs-handle-write-region
   (start end filename &optional append visit lockname mustbenew)
   "Like `write-region' for Tramp files."
@@ -269,28 +330,16 @@ connection if a previous connection has died for some 
reason."
 
       (unless
          (or (tramp-fuse-mounted-p vec)
-             (let* ((port (or (tramp-file-name-port vec) ""))
-                    (spec (format-spec-make ?p port))
-                    mount-args
-                    (mount-args
-                     (dolist
-                         (x
-                          (tramp-get-method-parameter vec 'tramp-mount-args)
-                          mount-args)
-                       (setq mount-args
-                             (append
-                              mount-args
-                              (let ((y (mapcar
-                                        (lambda (z) (format-spec z spec))
-                                        x)))
-                                (unless (member "" y) y)))))))
-               (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) mount-args))))
+             (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))))
 
diff --git a/lisp/net/tramp-sudoedit.el b/lisp/net/tramp-sudoedit.el
index e181365..66737e6 100644
--- a/lisp/net/tramp-sudoedit.el
+++ b/lisp/net/tramp-sudoedit.el
@@ -791,22 +791,16 @@ in case of error, t otherwise."
   (tramp-sudoedit-maybe-open-connection vec)
   (with-current-buffer (tramp-get-connection-buffer vec)
     (erase-buffer)
-    (let* ((login (tramp-get-method-parameter vec 'tramp-sudo-login))
-          (host (or (tramp-file-name-host vec) ""))
-          (user (or (tramp-file-name-user vec) ""))
-          (spec (format-spec-make ?h host ?u user))
-          (args (append
-                 (tramp-compat-flatten-tree
-                  (mapcar
-                   (lambda (x)
-                     (setq x (mapcar (lambda (y) (format-spec y spec)) x))
-                     (unless (member "" x) x))
-                   login))
-                 (tramp-compat-flatten-tree (delq nil args))))
-          (delete-exited-processes t)
+    (let* ((delete-exited-processes t)
           (process-connection-type tramp-process-connection-type)
           (p (apply #'start-process
-                    (tramp-get-connection-name vec) (current-buffer) args))
+                    (tramp-get-connection-name vec) (current-buffer)
+                    (append
+                     (tramp-expand-args
+                      vec 'tramp-sudo-login
+                      ?h (or (tramp-file-name-host vec) "")
+                      ?u (or (tramp-file-name-user vec) ""))
+                     (tramp-compat-flatten-tree args))))
           ;; We suppress the messages `Waiting for prompts from remote shell'.
           (tramp-verbose (if (= tramp-verbose 3) 2 tramp-verbose))
           ;; We do not want to save the password.
diff --git a/lisp/net/tramp.el b/lisp/net/tramp.el
index 9f65608..da779d3 100644
--- a/lisp/net/tramp.el
+++ b/lisp/net/tramp.el
@@ -3765,6 +3765,22 @@ User is always nil."
     ;; Result.
     target-alist))
 
+(defun tramp-expand-args (vec parameter &rest spec-list)
+  "Expand login arguments as given by PARAMETER in `tramp-methods'.
+PARAMETER is a symbol like `tramp-login-args', denoting a list of
+list of strings from `tramp-methods', containing %-sequences for
+substitution.  SPEC-LIST is a list of char/value pairs used for
+`format-spec-make'."
+  (let ((args (tramp-get-method-parameter vec parameter))
+       (spec (apply 'format-spec-make spec-list)))
+    ;; Expand format spec.
+    (tramp-compat-flatten-tree
+     (mapcar
+      (lambda (x)
+       (setq x (mapcar (lambda (y) (format-spec y spec)) x))
+       (unless (member "" x) x))
+      args))))
+
 (defun tramp-direct-async-process-p (&rest args)
   "Whether direct async `make-process' can be called."
   (let ((v (tramp-dissect-file-name default-directory))
@@ -3846,14 +3862,11 @@ It does not support `:stderr'."
                (append `("cd" ,localname "&&" "(" "env") env `(,command ")"))))
 
          ;; Check for `tramp-sh-file-name-handler', because something
-         ;; is different between tramp-adb.el and tramp-sh.el.
+         ;; is different between tramp-sh.el, and tramp-adb.el or
+         ;; tramp-sshfs.el.
          (let* ((sh-file-name-handler-p (tramp-sh-file-name-handler-p v))
                 (login-program
                  (tramp-get-method-parameter v 'tramp-login-program))
-                (login-args
-                 (tramp-get-method-parameter v 'tramp-login-args))
-                (async-args
-                 (tramp-get-method-parameter v 'tramp-async-args))
                 ;; 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
@@ -3871,29 +3884,23 @@ It does not support `:stderr'."
                  (when sh-file-name-handler-p
                    (tramp-compat-funcall
                     'tramp-ssh-controlmaster-options v)))
-                spec p)
+                login-args p)
 
-           ;; Replace `login-args' place holders.
+           ;; Replace `login-args' place holders.  Split
+           ;; ControlMaster options.
            (setq
-            spec (format-spec-make ?t tmpfile)
-            options (format-spec (or options "") spec)
-            spec (format-spec-make
-                  ?h (or host "") ?u (or user "") ?p (or port "")
-                  ?c options ?l "")
-            ;; Add arguments for asynchronous processes.
-            login-args (append async-args login-args)
-            ;; Expand format spec.
             login-args
-            (tramp-compat-flatten-tree
-             (mapcar
-              (lambda (x)
-                (setq x (mapcar (lambda (y) (format-spec y spec)) x))
-                (unless (member "" x) x))
-              login-args))
-            ;; Split ControlMaster options.
-            login-args
-            (tramp-compat-flatten-tree
-             (mapcar (lambda (x) (split-string x " ")) login-args))
+            (append
+             (tramp-compat-flatten-tree
+              (tramp-get-method-parameter v 'tramp-async-args))
+             (tramp-compat-flatten-tree
+              (mapcar
+               (lambda (x) (split-string x " "))
+               (tramp-expand-args
+                v 'tramp-login-args
+                ?h (or host "") ?u (or user "") ?p (or port "")
+                ?c (format-spec (or options "") (format-spec-make ?t tmpfile))
+                ?l ""))))
             p (make-process
                :name name :buffer buffer
                :command (append `(,login-program) login-args command)
diff --git a/test/lisp/net/tramp-tests.el b/test/lisp/net/tramp-tests.el
index d9a8065..6565919 100644
--- a/test/lisp/net/tramp-tests.el
+++ b/test/lisp/net/tramp-tests.el
@@ -3537,7 +3537,7 @@ They might differ only in time attributes or directory 
size."
 This tests also `file-executable-p', `file-writable-p' and `set-file-modes'."
   (skip-unless (tramp--test-enabled))
   (skip-unless
-   (or (tramp--test-sh-p) (tramp--test-sudoedit-p)
+   (or (tramp--test-sh-p) (tramp--test-sshfs-p) (tramp--test-sudoedit-p)
        ;; Not all tramp-gvfs.el methods support changing the file mode.
        (and
        (tramp--test-gvfs-p)
@@ -4368,11 +4368,15 @@ This tests also `make-symbolic-link', `file-truename' 
and `add-name-to-file'."
          (and (featurep 'tramp-test-load) (unload-feature 'tramp-test-load))
          (delete-file tmp-name))))))
 
+(defun tramp--test-shell-file-name ()
+  "Return default remote shell.."
+  (if (tramp--test-adb-p) "/system/bin/sh" "/bin/sh"))
+
 (ert-deftest tramp-test28-process-file ()
   "Check `process-file'."
   :tags '(:expensive-test)
   (skip-unless (tramp--test-enabled))
-  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p)))
+  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p) 
(tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
 
   (dolist (quoted (if (tramp--test-expensive-test) '(nil t) '(nil)))
@@ -4389,25 +4393,27 @@ This tests also `make-symbolic-link', `file-truename' 
and `add-name-to-file'."
            (should-not (zerop (process-file "binary-does-not-exist")))
            ;; Return exit code.
            (should (= 42 (process-file
-                          (if (tramp--test-adb-p) "/system/bin/sh" "/bin/sh")
+                          (tramp--test-shell-file-name)
                           nil nil nil "-c" "exit 42")))
            ;; Return exit code in case the process is interrupted,
            ;; and there's no indication for a signal describing string.
-           (let (process-file-return-signal-string)
-             (should
-              (= (+ 128 2)
-                 (process-file
-                  (if (tramp--test-adb-p) "/system/bin/sh" "/bin/sh")
-                  nil nil nil "-c" "kill -2 $$"))))
+           (unless (tramp--test-sshfs-p)
+             (let (process-file-return-signal-string)
+               (should
+                (= (+ 128 2)
+                   (process-file
+                    (tramp--test-shell-file-name)
+                    nil nil nil "-c" "kill -2 $$")))))
            ;; Return string in case the process is interrupted and
            ;; there's an indication for a signal describing string.
-           (let ((process-file-return-signal-string t))
-             (should
-              (string-match-p
-               "Interrupt\\|Signal 2"
-               (process-file
-                (if (tramp--test-adb-p) "/system/bin/sh" "/bin/sh")
-                nil nil nil "-c" "kill -2 $$"))))
+           (unless (tramp--test-sshfs-p)
+             (let ((process-file-return-signal-string t))
+               (should
+                (string-match-p
+                 "Interrupt\\|Signal 2"
+                 (process-file
+                  (tramp--test-shell-file-name)
+                  nil nil nil "-c" "kill -2 $$")))))
 
            (with-temp-buffer
              (write-region "foo" nil tmp-name)
@@ -4451,7 +4457,7 @@ This tests also `make-symbolic-link', `file-truename' and 
`add-name-to-file'."
   "Check `start-file-process'."
   :tags '(:expensive-test)
   (skip-unless (tramp--test-enabled))
-  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p)))
+  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p) 
(tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
 
   (dolist (quoted (if (tramp--test-expensive-test) '(nil t) '(nil)))
@@ -4571,7 +4577,7 @@ If UNSTABLE is non-nil, the test is tagged as 
`:unstable'."
   "Check `make-process'."
   :tags '(:expensive-test)
   (skip-unless (tramp--test-enabled))
-  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p)))
+  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p) 
(tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
   ;; `make-process' supports file name handlers since Emacs 27.
   (skip-unless (tramp--test-emacs27-p))
@@ -4799,7 +4805,7 @@ INPUT, if non-nil, is a string sent to the process."
   ;; Prior Emacs 27, `shell-file-name' was hard coded as "/bin/sh" for
   ;; remote processes in Emacs.  That doesn't work for tramp-adb.el.
   (skip-unless (or (and (tramp--test-adb-p) (tramp--test-emacs27-p))
-                  (tramp--test-sh-p)))
+                  (tramp--test-sh-p) (tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
 
   (dolist (quoted (if (tramp--test-expensive-test) '(nil t) '(nil)))
@@ -4898,7 +4904,7 @@ INPUT, if non-nil, is a string sent to the process."
   :tags '(:expensive-test :unstable)
   (skip-unless (tramp--test-enabled))
   (skip-unless nil)
-  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p)))
+  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p) 
(tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
   ;; Prior Emacs 27, `shell-command-dont-erase-buffer' wasn't working properly.
   (skip-unless (tramp--test-emacs27-p))
@@ -5223,7 +5229,7 @@ Use direct async.")
   ;; Prior Emacs 27, `shell-file-name' was hard coded as "/bin/sh" for
   ;; remote processes in Emacs.  That doesn't work for tramp-adb.el.
   (skip-unless (or (and (tramp--test-adb-p) (tramp--test-emacs27-p))
-                  (tramp--test-sh-p)))
+                  (tramp--test-sh-p) (tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
   ;; Since Emacs 26.1.
   (skip-unless (and (fboundp 'connection-local-set-profile-variables)
@@ -5245,8 +5251,7 @@ Use direct async.")
          (with-no-warnings
            (connection-local-set-profile-variables
             'remote-sh
-            `((explicit-shell-file-name
-               . ,(if (tramp--test-adb-p) "/system/bin/sh" "/bin/sh"))
+            `((explicit-shell-file-name . ,(tramp--test-shell-file-name))
               (explicit-sh-args . ("-c" "echo foo"))))
            (connection-local-set-profiles
             `(:application tramp
@@ -5280,7 +5285,7 @@ Use direct async.")
 (ert-deftest tramp-test35-exec-path ()
   "Check `exec-path' and `executable-find'."
   (skip-unless (tramp--test-enabled))
-  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p)))
+  (skip-unless (or (tramp--test-adb-p) (tramp--test-sh-p) 
(tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
   ;; Since Emacs 27.1.
   (skip-unless (fboundp 'exec-path))
@@ -6120,7 +6125,6 @@ Use the `stat' command."
   (skip-unless (tramp--test-sh-p))
   (skip-unless (not (tramp--test-rsync-p)))
   (skip-unless (not (tramp--test-windows-nt-and-pscp-psftp-p)))
-  (skip-unless (or (tramp--test-emacs26-p) (not (tramp--test-rclone-p))))
   ;; We cannot use `tramp-test-vec', because this fails during compilation.
   (with-parsed-tramp-file-name tramp-test-temporary-file-directory nil
     (skip-unless (tramp-get-remote-stat v)))
@@ -6140,7 +6144,6 @@ Use the `perl' command."
   (skip-unless (tramp--test-sh-p))
   (skip-unless (not (tramp--test-rsync-p)))
   (skip-unless (not (tramp--test-windows-nt-and-pscp-psftp-p)))
-  (skip-unless (or (tramp--test-emacs26-p) (not (tramp--test-rclone-p))))
   ;; We cannot use `tramp-test-vec', because this fails during compilation.
   (with-parsed-tramp-file-name tramp-test-temporary-file-directory nil
     (skip-unless (tramp-get-remote-perl v)))
@@ -6163,7 +6166,6 @@ Use the `ls' command."
   (skip-unless (tramp--test-sh-p))
   (skip-unless (not (tramp--test-rsync-p)))
   (skip-unless (not (tramp--test-windows-nt-and-pscp-psftp-p)))
-  (skip-unless (or (tramp--test-emacs26-p) (not (tramp--test-rclone-p))))
 
   (let ((tramp-connection-properties
         (append
@@ -6249,7 +6251,6 @@ Use the `stat' command."
   (skip-unless (not (tramp--test-windows-nt-and-pscp-psftp-p)))
   (skip-unless (not (tramp--test-ksh-p)))
   (skip-unless (not (tramp--test-crypt-p)))
-  (skip-unless (or (tramp--test-emacs26-p) (not (tramp--test-rclone-p))))
   ;; We cannot use `tramp-test-vec', because this fails during compilation.
   (with-parsed-tramp-file-name tramp-test-temporary-file-directory nil
     (skip-unless (tramp-get-remote-stat v)))
@@ -6273,7 +6274,6 @@ Use the `perl' command."
   (skip-unless (not (tramp--test-windows-nt-and-pscp-psftp-p)))
   (skip-unless (not (tramp--test-ksh-p)))
   (skip-unless (not (tramp--test-crypt-p)))
-  (skip-unless (or (tramp--test-emacs26-p) (not (tramp--test-rclone-p))))
   ;; We cannot use `tramp-test-vec', because this fails during compilation.
   (with-parsed-tramp-file-name tramp-test-temporary-file-directory nil
     (skip-unless (tramp-get-remote-perl v)))
@@ -6300,7 +6300,6 @@ Use the `ls' command."
   (skip-unless (not (tramp--test-windows-nt-and-pscp-psftp-p)))
   (skip-unless (not (tramp--test-ksh-p)))
   (skip-unless (not (tramp--test-crypt-p)))
-  (skip-unless (or (tramp--test-emacs26-p) (not (tramp--test-rclone-p))))
 
   (let ((tramp-connection-properties
         (append
@@ -6341,6 +6340,7 @@ Use the `ls' command."
   "Set \"process-name\" and \"process-buffer\" connection properties.
 The values are derived from PROC.  Run BODY.
 This is needed in timer functions as well as process filters and sentinels."
+  ;; FIXME: For tramp-sshfs.el, `processp' does not work.
   (declare (indent 1) (debug (processp body)))
   `(let* ((v (tramp-get-connection-property ,proc "vector" nil))
          (pname (tramp-get-connection-property v "process-name" nil))
@@ -6380,7 +6380,7 @@ process sentinels.  They shall not disturb each other."
   ;; Prior Emacs 27, `shell-file-name' was hard coded as "/bin/sh" for
   ;; remote processes in Emacs.  That doesn't work for tramp-adb.el.
   (skip-unless (or (and (tramp--test-adb-p) (tramp--test-emacs27-p))
-                  (tramp--test-sh-p)))
+                  (tramp--test-sh-p) (tramp--test-sshfs-p)))
   (skip-unless (not (tramp--test-crypt-p)))
   (skip-unless (not (tramp--test-docker-p)))
   (skip-unless (not (tramp--test-windows-nt-p)))
@@ -6390,7 +6390,7 @@ process sentinels.  They shall not disturb each other."
     (define-key special-event-map [sigusr1] #'tramp--test-timeout-handler)
     (let* (;; For the watchdog.
           (default-directory (expand-file-name temporary-file-directory))
-          (shell-file-name (if (tramp--test-adb-p) "/system/bin/sh" "/bin/sh"))
+          (shell-file-name (tramp--test-shell-file-name))
           ;; It doesn't work on w32 systems.
           (watchdog
             (start-process-shell-command
@@ -6765,8 +6765,8 @@ If INTERACTIVE is non-nil, the tests are run 
interactively."
 ;; * Work on skipped tests.  Make a comment, when it is impossible.
 ;; * Revisit expensive tests, once problems in `tramp-error' are solved.
 ;; * Fix `tramp-test06-directory-file-name' for `ftp'.
-;; * Implement `tramp-test31-interrupt-process' for `adb' and for
-;;   direct async processes.
+;; * Implement `tramp-test31-interrupt-process' for `adb', `sshfs' and
+;;   for direct async processes.
 
 (provide 'tramp-tests)
 



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