Allow for adding new members to Tar archives.

* lisp/tar-mode.el: Allow for adding new archive members.
(tar-new-regular-file-header, tar--pad-to, tar--put-at)
(tar-header-serialize): New functions.
(tar-current-position): Split from tar-current-descriptor.
(tar-current-descriptor): Use it.
(tar-new-entry): New command.
(tar-mode-map): Bind it.
* doc/emacs/files.texi (File Archives): Document "I" for tar-new-entry.
* etc/NEWS: Mention the new tar-new-entry command.

Fixes: debbugs:19274

2 files changed, 8 insertions, 0 deletions

diff --git a/etc/ChangeLog b/etc/ChangeLog
index b31e8a99383..0677e441b83 100644
--- a/etc/ChangeLog
+++ b/etc/ChangeLog
@@ -1,3 +1,7 @@
+2015-01-27  Ivan Shmakov  <ivan@siamics.net>
+
+        * NEWS: Mention the new tar-new-entry command.  (Bug#19274)
+
 2015-01-27  Thomas Fitzsimmons  <fitzsim@fitzsim.org>
 
         * NEWS: Document EUDC improvements.
diff --git a/etc/NEWS b/etc/NEWS
index 755277854b7..4b0a268d8f2 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -527,6 +527,10 @@ to avoid interfering with the kill ring.
 allow overriding the regular expression that recognizes the ldapsearch
 command line's password prompt.
 
++++
+** tar-mode: new `tar-new-entry' command, allowing for new members to
+be added to the archive.
+
 ** Obsolete packages
 
 ---