1 ;;; tramp-compat.el --- Tramp compatibility functions
3 ;; Copyright (C) 2007-2016 Free Software Foundation, Inc.
5 ;; Author: Michael Albinus <michael.albinus@gmx.de>
6 ;; Keywords: comm, processes
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;; Tramp's main Emacs version for development is Emacs 25. This
27 ;; package provides compatibility functions for Emacs 23 and Emacs 24.
31 ;; Pacify byte-compiler.
35 (require 'auth-source
)
38 (require 'format-spec
)
39 (require 'password-cache
)
42 (require 'ucs-normalize
)
45 (require 'tramp-loaddefs
)
47 ;; `remote-file-name-inhibit-cache' has been introduced with Emacs
48 ;; 24.1. Besides t, nil, and integer, we use also timestamps (as
49 ;; returned by `current-time') internally.
50 (unless (boundp 'remote-file-name-inhibit-cache
)
51 (defvar remote-file-name-inhibit-cache nil
))
53 ;; For not existing functions, obsolete functions, or functions with a
54 ;; changed argument list, there are compiler warnings. We want to
55 ;; avoid them in cases we know what we do.
56 (defmacro tramp-compat-funcall
(function &rest arguments
)
57 "Call FUNCTION if it exists. Do not raise compiler warnings."
58 `(when (or (subrp ,function
) (functionp ,function
))
59 (with-no-warnings (funcall ,function
,@arguments
))))
61 ;; We currently use "[" and "]" in the filename format for IPv6 hosts
62 ;; of GNU Emacs. This means that Emacs wants to expand wildcards if
63 ;; `find-file-wildcards' is non-nil, and then barfs because no
64 ;; expansion could be found. We detect this situation and do
65 ;; something really awful: we have `file-expand-wildcards' return the
66 ;; original filename if it can't expand anything. Let's just hope
67 ;; that this doesn't break anything else. It is not needed anymore
68 ;; since GNU Emacs 23.2.
69 (unless (featurep 'files
'remote-wildcards
)
70 (defadvice file-expand-wildcards
71 (around tramp-advice-file-expand-wildcards activate
)
72 (let ((name (ad-get-arg 0)))
73 ;; If it's a Tramp file, look if wildcards need to be expanded
76 (tramp-tramp-file-p name
)
77 (not (string-match "[[*?]" (file-remote-p name
'localname
))))
78 (setq ad-return-value
(list name
))
79 ;; Otherwise, just run the original function.
85 'file-expand-wildcards
'around
'tramp-advice-file-expand-wildcards
)
86 (ad-activate 'file-expand-wildcards
))))
88 ;; `condition-case-unless-debug' is introduced with Emacs 24.
89 (if (fboundp 'condition-case-unless-debug
)
90 (defalias 'tramp-compat-condition-case-unless-debug
91 'condition-case-unless-debug
)
92 (defmacro tramp-compat-condition-case-unless-debug
93 (var bodyform
&rest handlers
)
94 "Like `condition-case' except that it does not catch anything when debugging."
95 (declare (debug condition-case
) (indent 2))
96 (let ((bodysym (make-symbol "body")))
97 `(let ((,bodysym
(lambda () ,bodyform
)))
104 (defsubst tramp-compat-temporary-file-directory
()
105 "Return name of directory for temporary files.
106 It is the default value of `temporary-file-directory'."
107 ;; We must return a local directory. If it is remote, we could run
109 (eval (car (get 'temporary-file-directory
'standard-value
))))
111 (defsubst tramp-compat-make-temp-file
(f &optional dir-flag
)
112 "Create a local temporary file (compat function).
113 Add the extension of F, if existing."
114 (let* (file-name-handler-alist
115 (prefix (expand-file-name
116 (symbol-value 'tramp-temp-name-prefix
)
117 (tramp-compat-temporary-file-directory)))
118 (extension (file-name-extension f t
)))
119 (make-temp-file prefix dir-flag extension
)))
121 ;; `temporary-file-directory' as function is introduced with Emacs 25.2.
122 (defalias 'tramp-compat-temporary-file-directory-function
123 (if (fboundp 'temporary-file-directory
)
124 'temporary-file-directory
125 'tramp-handle-temporary-file-directory
))
127 ;; PRESERVE-EXTENDED-ATTRIBUTES has been introduced with Emacs 24.1
128 ;; (as PRESERVE-SELINUX-CONTEXT), and renamed in Emacs 24.3.
129 (defun tramp-compat-copy-file
130 (filename newname
&optional ok-if-already-exists keep-date
131 preserve-uid-gid preserve-extended-attributes
)
132 "Like `copy-file' for Tramp files (compat function)."
134 (preserve-extended-attributes
136 (tramp-compat-funcall
137 'copy-file filename newname ok-if-already-exists keep-date
138 preserve-uid-gid preserve-extended-attributes
)
139 (wrong-number-of-arguments
141 filename newname ok-if-already-exists keep-date preserve-uid-gid
))))
144 filename newname ok-if-already-exists keep-date preserve-uid-gid
))))
146 ;; COPY-CONTENTS has been introduced with Emacs 24.1.
147 (defun tramp-compat-copy-directory
148 (directory newname
&optional keep-time parents copy-contents
)
149 "Make a copy of DIRECTORY (compat function)."
151 (tramp-compat-funcall
152 'copy-directory directory newname keep-time parents copy-contents
)
154 ;; `copy-directory' is either not implemented, or it does not
155 ;; support the the COPY-CONTENTS flag. For the time being, we
156 ;; ignore COPY-CONTENTS as well.
159 ;; If `default-directory' is a remote directory, make sure we
160 ;; find its `copy-directory' handler.
161 (let ((handler (or (find-file-name-handler directory
'copy-directory
)
162 (find-file-name-handler newname
'copy-directory
))))
164 (funcall handler
'copy-directory directory newname keep-time parents
)
166 ;; Compute target name.
167 (setq directory
(directory-file-name (expand-file-name directory
))
168 newname
(directory-file-name (expand-file-name newname
)))
169 (if (and (file-directory-p newname
)
170 (not (string-equal (file-name-nondirectory directory
)
171 (file-name-nondirectory newname
))))
174 (file-name-nondirectory directory
) newname
)))
175 (if (not (file-directory-p newname
)) (make-directory newname parents
))
180 (if (file-directory-p file
)
181 (tramp-compat-copy-directory file newname keep-time parents
)
182 (copy-file file newname t keep-time
)))
183 ;; We do not want to delete "." and "..".
184 (directory-files directory
'full directory-files-no-dot-files-regexp
))
186 ;; Set directory attributes.
187 (set-file-modes newname
(file-modes directory
))
189 (set-file-times newname
(nth 5 (file-attributes directory
)))))))))
191 ;; TRASH has been introduced with Emacs 24.1.
192 (defun tramp-compat-delete-file (filename &optional trash
)
193 "Like `delete-file' for Tramp files (compat function)."
195 (tramp-compat-funcall 'delete-file filename trash
)
196 ;; This Emacs version does not support the TRASH flag.
197 (wrong-number-of-arguments
198 (let ((delete-by-moving-to-trash
199 (and (boundp 'delete-by-moving-to-trash
)
200 (symbol-value 'delete-by-moving-to-trash
)
202 (delete-file filename
)))))
204 ;; RECURSIVE has been introduced with Emacs 23.2. TRASH has been
205 ;; introduced with Emacs 24.1.
206 (defun tramp-compat-delete-directory (directory &optional recursive trash
)
207 "Like `delete-directory' for Tramp files (compat function)."
211 (tramp-compat-funcall 'delete-directory directory recursive trash
))
213 (delete-directory directory recursive
)))
214 ;; This Emacs version does not support the TRASH flag. We use the
215 ;; implementation from Emacs 23.2.
216 (wrong-number-of-arguments
217 (setq directory
(directory-file-name (expand-file-name directory
)))
218 (when (not (file-symlink-p directory
))
220 (if (eq t
(car (file-attributes file
)))
221 (tramp-compat-delete-directory file recursive trash
)
222 (tramp-compat-delete-file file trash
)))
224 directory
'full directory-files-no-dot-files-regexp
)))
225 (delete-directory directory
))))
227 (defun tramp-compat-process-running-p (process-name)
228 "Returns t if system process PROCESS-NAME is running for `user-login-name'."
229 (when (stringp process-name
)
231 ;; GNU Emacs 22 on w32.
232 ((fboundp 'w32-window-exists-p
)
233 (tramp-compat-funcall 'w32-window-exists-p process-name process-name
))
236 ((and (fboundp 'list-system-processes
) (fboundp 'process-attributes
))
238 (dolist (pid (tramp-compat-funcall 'list-system-processes
) result
)
239 (let ((attributes (process-attributes pid
)))
240 (when (and (string-equal
241 (cdr (assoc 'user attributes
)) (user-login-name))
242 (let ((comm (cdr (assoc 'comm attributes
))))
243 ;; The returned command name could be truncated
244 ;; to 15 characters. Therefore, we cannot check
245 ;; for `string-equal'.
246 (and comm
(string-match
247 (concat "^" (regexp-quote comm
))
249 (setq result t
)))))))))
251 ;; `default-toplevel-value' has been declared in Emacs 24.
252 (unless (fboundp 'default-toplevel-value
)
253 (defalias 'default-toplevel-value
'symbol-value
))
255 ;; `format-message' is new in Emacs 25.
256 (unless (fboundp 'format-message
)
257 (defalias 'format-message
'format
))
259 (add-hook 'tramp-unload-hook
261 (unload-feature 'tramp-loaddefs
'force
)
262 (unload-feature 'tramp-compat
'force
)))
264 (provide 'tramp-compat
)
268 ;;; tramp-compat.el ends here