* lisp/arc-mode.el (archive-summarize): Let-bind `buffer-file-truename'

to nil around the call to `add-text-properties' to prevent
directory time modification by lock_file. 
* lisp/tar-mode.el (tar-summarize-buffer): Idem.

Fixes: debbugs:2295

3 files changed, 17 insertions, 7 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 4ac0f1d451e..bdc8afd208d 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,12 @@
 2012-09-30  Juri Linkov  <juri@jurta.org>
 
+        * arc-mode.el (archive-summarize): Let-bind `buffer-file-truename'
+        to nil around the call to `add-text-properties' to prevent
+        directory time modification by lock_file.  (Bug#2295)
+        * tar-mode.el (tar-summarize-buffer): Idem.
+
+2012-09-30  Juri Linkov  <juri@jurta.org>
+
         * facemenu.el (list-colors-sort): Add option "Luminance".
         (list-colors-sort-key): Implement it.
 
@@ -2686,8 +2693,9 @@
 
         * register.el (copy-to-register, copy-rectangle-to-register):
         Deactivate the mark, and use indicate-copied-region (Bug#10056).
-        (append-to-register, prepend-to-register):
-        Call 2012-07-29  Juri Linkov  <juri@jurta.org>
+        (append-to-register, prepend-to-register): Call indicate-copied-region.
+
+2012-07-29  Juri Linkov  <juri@jurta.org>
 
         * simple.el (async-shell-command-buffer): New defcustom.
         (shell-command): Use it.  (Bug#4719)
diff --git a/lisp/arc-mode.el b/lisp/arc-mode.el
index a97a052dc08..c04cd8dcf9d 100644
--- a/lisp/arc-mode.el
+++ b/lisp/arc-mode.el
@@ -787,7 +787,8 @@ is visible (and the real data of the buffer is hidden).
 Optional argument SHUT-UP, if non-nil, means don't print messages
 when parsing the archive."
   (widen)
-  (let ((inhibit-read-only t))
+  (let ((buffer-file-truename nil) ; avoid changing dir mtime by lock_file
+        (inhibit-read-only t))
     (setq archive-proper-file-start (copy-marker (point-min) t))
     (set (make-local-variable 'change-major-mode-hook) 'archive-desummarize)
     (or shut-up
diff --git a/lisp/tar-mode.el b/lisp/tar-mode.el
index 9cd69d84250..2622a8215b8 100644
--- a/lisp/tar-mode.el
+++ b/lisp/tar-mode.el
@@ -518,12 +518,13 @@ MODE should be an integer which is a file mode value."
         (progress-reporter-done progress-reporter)
       (message "Warning: premature EOF parsing tar file"))
     (goto-char (point-min))
-    (let ((inhibit-read-only t)
+    (let ((buffer-file-truename nil) ; avoid changing dir mtime by lock_file
+          (inhibit-read-only t)
           (total-summaries
            (mapconcat 'tar-header-block-summarize tar-parse-info "\n")))
-      (insert total-summaries "\n"))
-    (goto-char (point-min))
-    (restore-buffer-modified-p modified)))
+      (insert total-summaries "\n")
+      (goto-char (point-min))
+      (restore-buffer-modified-p modified))))
 
 (defvar tar-mode-map
   (let ((map (make-keymap)))