version 1.22.90 (Git)

* Record size autodetection

When listing or extracting archives, the actual record size is
reported only if the archive is read from a device (as opposed
to regular files and pipes).

* New command line option `--warning'

The `--warning' command line option allows to suppress or enable
particular warning messages during `tar' run.  It takes a single
argument (a `keyword'), identifying the class of warning messages
to affect.  If the argument is prefixed with `no-', such warning
messages are suppressed.  For example,

  tar --warning=no-alone-zero-block -x -f archive

suppresses the output of `A lone zero block' diagnostics, which is
normally issued if `archive' ends with a single block of zeros.

* New command line option `--level'

The `--level=N' option sets the incremental dump level N.  It
is valid when used in conjunction with the -c and --listed-incremental
options.  So far the only meaningful value for N is 0.  The
`--level=0' option forces creating the level 0 dump, by truncating
the snapshot file if it exists.

* Files removed during incremental dumps

If a file or directory is removed while incremental dump is
in progress, tar exact actions depend on whether this file
was explicitly listed in the command line, or was gathered
during file system scan.

If the file was explicitly listed in the command line, tar
issues error message and exits with the code 2, meaning
fatal error.

Otherwise, if the file was gathered during the file system
scan, tar issues a warning, saying "File removed before we read it",
and sets the exit code to 1, which means "some files differ".
If the --warning=no-file-removed option is given, no warning
is issued and the exit code remains 0.

* Bugfixes
** Fix handling of hard link targets by -c --transform.
** Fix hard links recognition with -c --remove-files.
** Fix restoring files from backup (debian bug #508199).
** Correctly restore modes and permissions on existing directories.