Output number of characters added to file (Bug#354)

* fileio.c (write_region):
* epa-file.el (epa-file-write-region):
* jka-compr.el (jka-compr-write-region):
* ange-ftp.el (ange-ftp-write-region):
* tramp-gvfs.el (tramp-gvfs-handle-write-region):
* tramp-sh.el (tramp-sh-handle-write-region):
* mm-util.el (mm-append-to-file): Functions now output
characters written in addition to file name.
* files.texi: Added documentation to write-region and
append-to-file describing their output.

9 files changed, 27 insertions, 16 deletions

diff --git a/doc/emacs/files.texi b/doc/emacs/files.texi
index 0b730e27d30..ed17f66ca2c 100644
--- a/doc/emacs/files.texi
+++ b/doc/emacs/files.texi
@@ -1641,9 +1641,11 @@ similar to the @kbd{M-x find-file-literally} command
   @kbd{M-x write-region} is the inverse of @kbd{M-x insert-file}; it
 copies the contents of the region into the specified file.  @kbd{M-x
 append-to-file} adds the text of the region to the end of the
-specified file.  @xref{Accumulating Text}.  The variable
-@code{write-region-inhibit-fsync} applies to these commands, as well
-as saving files; see @ref{Customize Save}.
+specified file.  @xref{Accumulating Text}.  When called interactively,
+these commands will print a message in the echo area giving the name
+of the file affected as well as the number of characters which were
+added.  The variable @code{write-region-inhibit-fsync} applies to
+these commands, as well as saving files; see @ref{Customize Save}.
 
 @findex set-file-modes
 @cindex file modes
diff --git a/etc/NEWS b/etc/NEWS
index 3574d0fb694..43de4b9168c 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -90,6 +90,11 @@ required capabilities are found in terminfo.  See the FAQ node
 
 * Changes in Emacs 26.1
 
++++
+** The functions write-region, append-to-file, and the like now output
+the number of characters added in addition to the name of the file
+affected.
+
 ** The variable 'emacs-version' no longer includes the build number.
 This is now stored separately in a new variable, 'emacs-build-number'.
 
diff --git a/lisp/epa-file.el b/lisp/epa-file.el
index c97acb837aa..72ffb58c308 100644
--- a/lisp/epa-file.el
+++ b/lisp/epa-file.el
@@ -290,7 +290,7 @@ If no one is selected, symmetric encryption will be performed.  "
     (if (or (eq visit t)
             (eq visit nil)
             (stringp visit))
-        (message "Wrote %s" buffer-file-name))))
+        (message "Wrote %d characters to `%s'" (- end start) buffer-file-name))))
 (put 'write-region 'epa-file 'epa-file-write-region)
 
 (defun epa-file-select-keys ()
diff --git a/lisp/gnus/mm-util.el b/lisp/gnus/mm-util.el
index 89f397e3ed0..f0dc803eddc 100644
--- a/lisp/gnus/mm-util.el
+++ b/lisp/gnus/mm-util.el
@@ -736,7 +736,7 @@ If INHIBIT is non-nil, inhibit `mm-inhibit-file-name-handlers'."
                      inhibit-file-name-handlers)
            inhibit-file-name-handlers)))
     (write-region start end filename t 'no-message)
-    (message "Appended to %s" filename)))
+    (message "Appended %d characters to `%s'" (- end start) filename)))
 
 (defun mm-write-region (start end filename &optional append visit lockname
                               coding-system inhibit)
diff --git a/lisp/jka-compr.el b/lisp/jka-compr.el
index 26a7cf506fd..55440a709c7 100644
--- a/lisp/jka-compr.el
+++ b/lisp/jka-compr.el
@@ -357,7 +357,7 @@ There should be no more than seven characters after the final `/'."
           (and (or (eq visit t)
                    (eq visit nil)
                    (stringp visit))
-               (message "Wrote %s" visit-file))
+               (message "Wrote %d characters to `%s'" (- end start) visit-file))
 
           ;; ensure `last-coding-system-used' has an appropriate value
           (setq last-coding-system-used coding-system-used)
diff --git a/lisp/net/ange-ftp.el b/lisp/net/ange-ftp.el
index cafdb3ecb06..aecb9e1ecbe 100644
--- a/lisp/net/ange-ftp.el
+++ b/lisp/net/ange-ftp.el
@@ -3284,7 +3284,7 @@ system TYPE.")
                 (set-buffer-modified-p nil)))
           ;; ensure `last-coding-system-used' has an appropriate value
           (setq last-coding-system-used coding-system-used)
-          (ange-ftp-message "Wrote %s" abbr)
+          (ange-ftp-message "Wrote %d characters to `%s'" (- end start) abbr)
           (ange-ftp-add-file-entry filename))
       (ange-ftp-real-write-region start end filename append visit))))
 
diff --git a/lisp/net/tramp-gvfs.el b/lisp/net/tramp-gvfs.el
index 59d8771cf1d..8ab34af85b7 100644
--- a/lisp/net/tramp-gvfs.el
+++ b/lisp/net/tramp-gvfs.el
@@ -1223,7 +1223,7 @@ file-notify events."
 
     ;; The end.
     (when (or (eq visit t) (null visit) (stringp visit))
-      (tramp-message v 0 "Wrote %s" filename))
+      (tramp-message v 0 "Wrote %d characters to `%s'" (- end start) filename))
     (run-hooks 'tramp-handle-write-region-hook)))
 
 
diff --git a/lisp/net/tramp-sh.el b/lisp/net/tramp-sh.el
index 997716227bc..f78f54154fd 100644
--- a/lisp/net/tramp-sh.el
+++ b/lisp/net/tramp-sh.el
@@ -3411,7 +3411,8 @@ the result will be a local, non-Tramp, file name."
         (when need-chown
           (tramp-set-file-uid-gid filename uid gid))
         (when (or (eq visit t) (null visit) (stringp visit))
-          (tramp-message v 0 "Wrote %s" filename))
+          (tramp-message v 0 "Wrote %d characters to `%s'"
+                         (- end start) filename))
         (run-hooks 'tramp-handle-write-region-hook)))))
 
 (defvar tramp-vc-registered-file-names nil
diff --git a/src/fileio.c b/src/fileio.c
index acbf76e0d81..0fc52294011 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -5150,13 +5150,16 @@ write_region (Lisp_Object start, Lisp_Object end, Lisp_Object filename,
     }
 
   if (!auto_saving && !noninteractive)
-    message_with_string ((NUMBERP (append)
-                          ? "Updated %s"
-                          : ! NILP (append)
-                          ? "Added to %s"
-                          : "Wrote %s"),
-                         visit_file, 1);
-
+    {
+      AUTO_STRING (format, NUMBERP (append)
+                   ? "Updated %d characters of `%s'"
+                   : ! NILP (append)
+                   ? "Added %d characters to `%s'"
+                   : "Wrote %d characters to `%s'");
+      CALLN (Fmessage, format,
+             make_number (XINT (end) - XINT (start)),
+             visit_file);
+    }
   return Qnil;
 }