579b0c006e
* lisp/net/tramp.el (tramp-handle-write-region): * lisp/net/tramp-adb.el (tramp-adb-handle-write-region): * lisp/net/tramp-sh.el (tramp-sh-handle-write-region): * lisp/net/tramp-smb.el (tramp-smb-handle-write-region): * lisp/net/tramp-sshfs.el (tramp-sshfs-handle-write-region): Don't use LOCKNAME for temp file. (Bug#49406) * test/lisp/shadowfile-tests.el (password-cache-expiry): Set `shadow-debug' also on emba.
367 lines
14 KiB
EmacsLisp
367 lines
14 KiB
EmacsLisp
;;; tramp-sshfs.el --- Tramp access functions via sshfs -*- lexical-binding:t -*-
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;; Copyright (C) 2021 Free Software Foundation, Inc.
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;; Author: Michael Albinus <michael.albinus@gmx.de>
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;; Keywords: comm, processes
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;; Package: tramp
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; sshfs is a program to mount a virtual file system, based on an sftp
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;; connection. Tramp uses its mount utility to access files and
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;; directories there.
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;; A remote file under sshfs control has the form
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;; "/sshfs:user@host#port:/path/to/file". User name and port number
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;; are optional.
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;;; Code:
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(require 'tramp)
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(require 'tramp-fuse)
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;;;###tramp-autoload
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(defconst tramp-sshfs-method "sshfs"
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"Tramp method for sshfs mounts.")
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(defcustom tramp-sshfs-program "sshfs"
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"The sshfs mount command."
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:group 'tramp
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:version "28.1"
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:type 'string)
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;;;###tramp-autoload
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(tramp--with-startup
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(add-to-list 'tramp-methods
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`(,tramp-sshfs-method
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(tramp-mount-args (("-C") ("-p" "%p")
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("-o" "idmap=user,reconnect")))
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;; These are for remote processes.
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(tramp-login-program "ssh")
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(tramp-login-args (("-q")("-l" "%u") ("-p" "%p")
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("-e" "none") ("%h") ("%l")))
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(tramp-direct-async t)
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(tramp-remote-shell ,tramp-default-remote-shell)
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(tramp-remote-shell-login ("-l"))
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(tramp-remote-shell-args ("-c"))))
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(add-to-list 'tramp-connection-properties
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`(,(format "/%s:" tramp-sshfs-method) "direct-async-process" t))
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(tramp-set-completion-function
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tramp-sshfs-method tramp-completion-function-alist-ssh))
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;; New handlers should be added here.
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;;;###tramp-autoload
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(defconst tramp-sshfs-file-name-handler-alist
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'((access-file . tramp-handle-access-file)
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(add-name-to-file . tramp-handle-add-name-to-file)
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;; `byte-compiler-base-file-name' performed by default handler.
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(copy-directory . tramp-handle-copy-directory)
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(copy-file . tramp-sshfs-handle-copy-file)
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(delete-directory . tramp-fuse-handle-delete-directory)
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(delete-file . tramp-fuse-handle-delete-file)
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;; `diff-latest-backup-file' performed by default handler.
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(directory-file-name . tramp-handle-directory-file-name)
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(directory-files . tramp-fuse-handle-directory-files)
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(directory-files-and-attributes
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. tramp-handle-directory-files-and-attributes)
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(dired-compress-file . ignore)
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(dired-uncache . tramp-handle-dired-uncache)
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(exec-path . tramp-sshfs-handle-exec-path)
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(expand-file-name . tramp-handle-expand-file-name)
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(file-accessible-directory-p . tramp-handle-file-accessible-directory-p)
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(file-acl . ignore)
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(file-attributes . tramp-fuse-handle-file-attributes)
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(file-directory-p . tramp-handle-file-directory-p)
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(file-equal-p . tramp-handle-file-equal-p)
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(file-executable-p . tramp-fuse-handle-file-executable-p)
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(file-exists-p . tramp-handle-file-exists-p)
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(file-in-directory-p . tramp-handle-file-in-directory-p)
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(file-local-copy . tramp-handle-file-local-copy)
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(file-modes . tramp-handle-file-modes)
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(file-name-all-completions . tramp-fuse-handle-file-name-all-completions)
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(file-name-as-directory . tramp-handle-file-name-as-directory)
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(file-name-case-insensitive-p . tramp-handle-file-name-case-insensitive-p)
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(file-name-completion . tramp-handle-file-name-completion)
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(file-name-directory . tramp-handle-file-name-directory)
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(file-name-nondirectory . tramp-handle-file-name-nondirectory)
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;; `file-name-sans-versions' performed by default handler.
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(file-newer-than-file-p . tramp-handle-file-newer-than-file-p)
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(file-notify-add-watch . ignore)
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(file-notify-rm-watch . ignore)
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(file-notify-valid-p . ignore)
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(file-ownership-preserved-p . ignore)
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(file-readable-p . tramp-fuse-handle-file-readable-p)
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(file-regular-p . tramp-handle-file-regular-p)
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(file-remote-p . tramp-handle-file-remote-p)
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(file-selinux-context . tramp-handle-file-selinux-context)
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(file-symlink-p . tramp-handle-file-symlink-p)
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(file-system-info . tramp-sshfs-handle-file-system-info)
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(file-truename . tramp-handle-file-truename)
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(file-writable-p . tramp-handle-file-writable-p)
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(find-backup-file-name . tramp-handle-find-backup-file-name)
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;; `get-file-buffer' performed by default handler.
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(insert-directory . tramp-handle-insert-directory)
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(insert-file-contents . tramp-sshfs-handle-insert-file-contents)
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(load . tramp-handle-load)
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(make-auto-save-file-name . tramp-handle-make-auto-save-file-name)
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(make-directory . tramp-fuse-handle-make-directory)
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(make-directory-internal . ignore)
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(make-nearby-temp-file . tramp-handle-make-nearby-temp-file)
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(make-process . tramp-handle-make-process)
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(make-symbolic-link . tramp-handle-make-symbolic-link)
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(process-file . tramp-sshfs-handle-process-file)
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(rename-file . tramp-sshfs-handle-rename-file)
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(set-file-acl . ignore)
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(set-file-modes . tramp-sshfs-handle-set-file-modes)
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(set-file-selinux-context . ignore)
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(set-file-times . ignore)
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(set-visited-file-modtime . tramp-handle-set-visited-file-modtime)
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(shell-command . tramp-handle-shell-command)
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(start-file-process . tramp-handle-start-file-process)
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(substitute-in-file-name . tramp-handle-substitute-in-file-name)
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(temporary-file-directory . tramp-handle-temporary-file-directory)
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(tramp-get-remote-gid . ignore)
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(tramp-get-remote-uid . ignore)
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(tramp-set-file-uid-gid . ignore)
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(unhandled-file-name-directory . ignore)
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(vc-registered . ignore)
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(verify-visited-file-modtime . tramp-handle-verify-visited-file-modtime)
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(write-region . tramp-sshfs-handle-write-region))
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"Alist of handler functions for Tramp SSHFS method.
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Operations not mentioned here will be handled by the default Emacs primitives.")
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;; It must be a `defsubst' in order to push the whole code into
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;; tramp-loaddefs.el. Otherwise, there would be recursive autoloading.
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;;;###tramp-autoload
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(defsubst tramp-sshfs-file-name-p (filename)
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"Check if it's a FILENAME for sshfs."
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(and (tramp-tramp-file-p filename)
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(string= (tramp-file-name-method (tramp-dissect-file-name filename))
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tramp-sshfs-method)))
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;;;###tramp-autoload
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(defun tramp-sshfs-file-name-handler (operation &rest args)
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"Invoke the sshfs handler for OPERATION and ARGS.
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First arg specifies the OPERATION, second arg is a list of
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arguments to pass to the OPERATION."
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(if-let ((fn (assoc operation tramp-sshfs-file-name-handler-alist)))
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(save-match-data (apply (cdr fn) args))
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(tramp-run-real-handler operation args)))
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;;;###tramp-autoload
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(tramp--with-startup
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(tramp-register-foreign-file-name-handler
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#'tramp-sshfs-file-name-p #'tramp-sshfs-file-name-handler))
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;; File name primitives.
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(defun tramp-sshfs-handle-copy-file
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(filename newname &optional ok-if-already-exists keep-date
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preserve-uid-gid preserve-extended-attributes)
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"Like `copy-file' for Tramp files."
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(setq filename (expand-file-name filename)
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newname (expand-file-name newname))
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(if (file-directory-p filename)
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(copy-directory filename newname keep-date t)
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(copy-file
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(if (tramp-sshfs-file-name-p filename)
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(tramp-fuse-local-file-name filename) filename)
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(if (tramp-sshfs-file-name-p newname)
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(tramp-fuse-local-file-name newname) newname)
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ok-if-already-exists keep-date
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preserve-uid-gid preserve-extended-attributes)
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(when (tramp-sshfs-file-name-p newname)
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(with-parsed-tramp-file-name newname nil
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(tramp-flush-file-properties v localname)))))
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(defun tramp-sshfs-handle-exec-path ()
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"Like `exec-path' for Tramp files."
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(append
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(with-parsed-tramp-file-name default-directory nil
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(with-tramp-connection-property (tramp-get-process v) "remote-path"
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(with-temp-buffer
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(process-file "getconf" nil t nil "PATH")
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(split-string
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(progn
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;; Read the expression.
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(goto-char (point-min))
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(buffer-substring (point) (point-at-eol)))
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":" 'omit))))
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;; The equivalent to `exec-directory'.
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`(,(tramp-file-local-name (expand-file-name default-directory)))))
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(defun tramp-sshfs-handle-file-system-info (filename)
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"Like `file-system-info' for Tramp files."
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;;`file-system-info' exists since Emacs 27.1.
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(tramp-compat-funcall 'file-system-info (tramp-fuse-local-file-name filename)))
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(defun tramp-sshfs-handle-insert-file-contents
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(filename &optional visit beg end replace)
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"Like `insert-file-contents' for Tramp files."
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(let ((result
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(insert-file-contents
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(tramp-fuse-local-file-name filename) visit beg end replace)))
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(when visit (setq buffer-file-name filename))
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(cons (expand-file-name filename) (cdr result))))
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(defun tramp-sshfs-handle-process-file
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(program &optional infile destination display &rest args)
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"Like `process-file' for Tramp files."
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;; The implementation is not complete yet.
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(when (and (numberp destination) (zerop destination))
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(error "Implementation does not handle immediate return"))
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(with-parsed-tramp-file-name default-directory nil
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(let ((command
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(format
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"cd %s && exec %s"
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localname
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(mapconcat #'tramp-shell-quote-argument (cons program args) " "))))
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(unwind-protect
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(apply
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#'tramp-call-process
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v (tramp-get-method-parameter v 'tramp-login-program)
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infile destination display
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(tramp-expand-args
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v 'tramp-login-args
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?h (or (tramp-file-name-host v) "")
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?u (or (tramp-file-name-user v) "")
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?p (or (tramp-file-name-port v) "")
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?l command))
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(unless process-file-side-effects
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(tramp-flush-directory-properties v ""))))))
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(defun tramp-sshfs-handle-rename-file
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(filename newname &optional ok-if-already-exists)
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"Like `rename-file' for Tramp files."
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(setq filename (expand-file-name filename)
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newname (expand-file-name newname))
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(rename-file
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(if (tramp-sshfs-file-name-p filename)
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(tramp-fuse-local-file-name filename) filename)
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(if (tramp-sshfs-file-name-p newname)
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(tramp-fuse-local-file-name newname) newname)
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ok-if-already-exists)
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(when (tramp-sshfs-file-name-p filename)
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(with-parsed-tramp-file-name filename nil
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(tramp-flush-file-properties v localname)))
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(when (tramp-sshfs-file-name-p newname)
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(with-parsed-tramp-file-name newname nil
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(tramp-flush-file-properties v localname))))
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(defun tramp-sshfs-handle-set-file-modes (filename mode &optional flag)
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"Like `set-file-modes' for Tramp files."
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(with-parsed-tramp-file-name filename nil
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(unless (and (eq flag 'nofollow) (file-symlink-p filename))
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(tramp-flush-file-properties v localname)
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(tramp-compat-set-file-modes
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(tramp-fuse-local-file-name filename) mode flag))))
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(defun tramp-sshfs-handle-write-region
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(start end filename &optional append visit _lockname mustbenew)
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"Like `write-region' for Tramp files."
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(setq filename (expand-file-name filename))
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(with-parsed-tramp-file-name filename nil
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(when (and mustbenew (file-exists-p filename)
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(or (eq mustbenew 'excl)
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(not
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(y-or-n-p
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(format "File %s exists; overwrite anyway? " filename)))))
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(tramp-error v 'file-already-exists filename))
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(write-region
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start end (tramp-fuse-local-file-name filename) append 'nomessage)
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(tramp-flush-file-properties v localname)
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;; The end.
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(when (and (null noninteractive)
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(or (eq visit t) (null visit) (stringp visit)))
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(tramp-message v 0 "Wrote %s" filename))
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(run-hooks 'tramp-handle-write-region-hook)))
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;; File name conversions.
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(defun tramp-sshfs-maybe-open-connection (vec)
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"Maybe open a connection VEC.
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Does not do anything if a connection is already open, but re-opens the
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connection if a previous connection has died for some reason."
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;; During completion, don't reopen a new connection.
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(unless (tramp-connectable-p vec)
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(throw 'non-essential 'non-essential))
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;; We need a process bound to the connection buffer. Therefore, we
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;; create a dummy process. Maybe there is a better solution?
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(unless (get-buffer-process (tramp-get-connection-buffer vec))
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(let ((p (make-network-process
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:name (tramp-get-connection-name vec)
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:buffer (tramp-get-connection-buffer vec)
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:server t :host 'local :service t :noquery t)))
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(process-put p 'vector vec)
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(set-process-query-on-exit-flag p nil)
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;; Set connection-local variables.
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(tramp-set-connection-local-variables vec)
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;; Create directory.
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(unless (file-directory-p (tramp-fuse-mount-point vec))
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(make-directory (tramp-fuse-mount-point vec) 'parents))
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(unless
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(or (tramp-fuse-mounted-p vec)
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(with-temp-buffer
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(zerop
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(apply
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#'tramp-call-process
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vec tramp-sshfs-program nil t nil
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(tramp-fuse-mount-spec vec)
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(tramp-fuse-mount-point vec)
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(tramp-expand-args
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vec 'tramp-mount-args
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?p (or (tramp-file-name-port vec) "")))))
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(tramp-error
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vec 'file-error "Error mounting %s" (tramp-fuse-mount-spec vec))))
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;; Mark it as connected.
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(tramp-set-connection-property
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(tramp-get-connection-process vec) "connected" t)))
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;; In `tramp-check-cached-permissions', the connection properties
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;; "{uid,gid}-{integer,string}" are used. We set them to proper values.
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(with-tramp-connection-property
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vec "uid-integer" (tramp-get-local-uid 'integer))
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(with-tramp-connection-property
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vec "gid-integer" (tramp-get-local-gid 'integer))
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(with-tramp-connection-property
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vec "uid-string" (tramp-get-local-uid 'string))
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(with-tramp-connection-property
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vec "gid-string" (tramp-get-local-gid 'string)))
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(add-hook 'tramp-unload-hook
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(lambda ()
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(unload-feature 'tramp-sshfs 'force)))
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(provide 'tramp-sshfs)
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;;; tramp-sshfs.el ends here
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