Mail Archives: cygwin/2006/04/12/09:44:57
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A new release of tar, 1.15.90-1, is available for experimental use.
NEWS:
=====
This is a new alpha-quality upstream release. It also relies on features
that have been added to cygwin since cygwin-1.5.19 was released (such as
freopen(NULL) and d_ino). In other words, to use this, you MUST install a
recent cygwin snapshot (20060329 or later), or wait for cygwin-1.5.20 to
be released. If you are not sure what that means, then stick with the
stable tar-1.15.1-4. A list of changes from the NEWS file is attached;
see also /usr/share/doc/tar-1.15.90/.
DESCRIPTION:
============
GNU Tar is an archiver program. It is used to create and manipulate files
that are actually collections of many other files; the program provides
users with an organized and systematic method of controlling a large
amount of data. Despite its name, that is an acronym of "tape archiver",
GNU Tar is able to direct its output to any available devices, files or
other programs, it may as well access remote devices or files. The main
areas of usage for GNU Tar are: storage, backup and transportation.
UPDATE:
=======
To update your installation, click on the "Install Cygwin now" link on the
http://cygwin.com/ web page. This downloads setup.exe to your system.
Save it and run setup, answer the questions and pick up 'tar' from the
'Base' category (it should already be selected). Since this is an
experimental release, you must first install a recent cygwin snapshot, and
you will have to use the "Exp" radio button in setup.exe.
DOWNLOAD:
=========
Note that downloads from sources.redhat.com (aka cygwin.com) aren't
allowed due to bandwidth limitations. This means that you will need to
find a mirror which has this update, please choose the one nearest to you:
http://cygwin.com/mirrors.html
QUESTIONS:
==========
If you want to make a point or ask a question the Cygwin mailing list is
the appropriate place.
- --
Eric Blake
volunteer cygwin tar maintainer
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GNU tar NEWS - User visible changes.
version 1.15.90 - Sergey Poznyakoff, 2006-02-19
* New features
* Any number of -T (--files-from) options may be used in the command line.
The file specified with -T may include any valid `tar' options,
including another -T option.
Compatibility note: older versions of tar would only recognize -C
as an option name within the file list file. Now any file whose name
starts with - is handled as an option. To insert file names starting with
dash, use the --add-file option.
* List files containing null-separated file names are detected and processed
automatically. It is no longer necessary to give the --null option.
* New option --no-unquote disables the unquoting of input file names.
This is useful for processing output from `find dir -print0'.
An orthogonal option --unquote is provided as well.
* New option --test-label tests the archive volume label.
If an argument is specified, the label is compared against its value.
Tar exits with code 0 if the two strings match, and with code 2 if
they do not.
If no argument is given, the --verbose option is implied. In this case,
tar prints the label name if present and exits with code 0.
* New option --show-stored-names. When creating an archive in verbose mode,
it lists member names as stored in the archive, i.e., with any eventual
prefixes removed. The option is useful, for example, while comparing
`tar cv' and `tar tv' outputs.
* New option --to-command pipes the contents of archive members to the
specified command.
* New option --atime-preserve=system, which uses the O_NOATIME feature
of recent Linux kernels to avoid some problems when preserving file
access times.
* New option --delay-directory-restore delays restoring modification times
and permissions of extracted directories until the end of extraction.
This is necessary for restoring from archives with unusual member
ordering (in particular, those created with --no-recursion option).
This option is implied when restoring from incremental archives.
* New option --restrict prohibits use of some potentially harmful tar
options. Currently it disables '!' escape in multi-volume name menu.
* New options --quoting-style and --quote-chars control the way tar
quotes member names on output. The --quoting-style takes an argument
specifying the quoting style to use (literal, shell, shell-always,
c, escape, locale, clocale). The argument to --quote-chars is a string
specifying characters to quote, even if the selected quoting style
would not quote them otherwise. The option --no-quote-chars is
provided to disable quoting certain characters.
* The end-of-volume script (introduced with --info-script option) can
get current archive name from the environment variable TAR_ARCHIVE and
the volume number from the variable TAR_VOLUME. It can alter the
archive name by writing new name to the file descriptor 3.
* Better support for full-resolution time stamps. Tar cannot restore
time stamps to full nanosecond resolution, though, until the kernel
guys get their act together and give us a system call to set file time
stamps to nanosecond resolution.
* The -v option now prints time stamps only to 1-minute resolution,
not full resolution, to avoid using up too many output columns.
Nanosecond resolution is now supported, but that would be too much.
* Bug fixes
** Allow non-option arguments to be interspersed with options.
** When extracting or listing archives in old GNU format, tar
used to read an extra block of data after a long name header
if length of the member name was divisible by block size (512).
Consequently, the file pointer was set off and the next member
was not processed correctly.
** Previous version created invalid archives when files shrink
during reading.
** Compare mode (tar d) hanged when trying to compare file contents.
** Previous versions in certain cases failed to restore directory
modification times.
** When creating an archive, do not attempt to store files whose
meta-data cannot be stored in the header due to format limitations
(for ustar and v7 formats).
** The --version option now also outputs information about copyright,
license, and credits. This reverts to the behavior of tar 1.14 and
earlier, and conforms to the GNU coding standards. The --license (-L)
option introduced in tar 1.15 has been removed, since it's no longer
needed.
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