Changelogs » Rdiff-backup

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Rdiff-backup

10.4

from Daniel Westermann-Clark.
  
  Log EACCES from listxattr rather than raising an exception -- this can happen
  when the repository has permission problems.
  
  Added Keith Edmunds patch adding the --create-full-path option.
  
  Fixed selection bug reported by Daniel Richard G.
  
  bug13576: You can now back ACLs to a computer that doesn't have the
  posix1e module.
  
  bug13613: Fix for overflow error that could happen when backing up
  files with dates far in the future on a 64bit machine to a 32 bit one.
  
  Symlink ownership should be preserved now.  Reported by Naoki
  Takebayashi and others.

2.1.0a1

----------------------------
  
  Changes
  
  * FIX: 64 bits version compiled with PyInstaller for Windows couldn't
  find its module rdiff_backup, closes 555
  
  Authors
  
  * Eric L

2.1.0a0

----------------------------
  
  Changes
  
  * CHG: Add no-compression defaults for videos .webm and tar
  zStandart-compressed files .tzst
  * CHG: depend on importlib-metadata instead of setuptools to get
  rdiff-backup veersion, closes 418
  * CHG: man page rdiff-backup-old(1) describes the old CLI,
  rdiff-backup(1) the new one
  * CHG: option \--test-server will test all servers even if one fails,
  returning 1 in such case, 2 if the parameters were incorrect, output
  has also slightly changed.
  * CHG: option \--version outputs extended version information when used
  in API versions above 200
  * CHG: Pickle protocol raised from 1 to 4, it shouldn't impact older
  versions of rdiff-backup as protocol 4 is known since Python 3.4 and
  the protocol version is recognized automatically on the receiving end
  * CHG: rdiff-backup now supports the newly released Python 3.9 and
  stops supporting the obsolete Python 3.5.
  * CHG: restoring a specific increment requires now the use of
  '\--restore' parameter
  * CHG: the host placeholder in the remote schema is now '{h}', '%s' is
  deprecated.
  * CHG: the old command line interface without explicit actions is
  considered deprecated
  * CHG: the Windows build uses Python 3.9 instead of Python 3.7 (nobody
  should notice)
  * DEV: action plugins are described and implemented as context manager
  * DEV: add coding conventions under docs/CODING.md to be followed by
  developers and reviewers. This is a living document which will be
  expanded over time.
  * DEV: add docs/api folder with API description to be followed and API
  v200.
  * DEV: added coding rules for sorting of items like functions,
  variables, methods, classes, etc.
  * DEV: add Globals.PICKLE_PROTOCOL constant and raise it's version from
  1 to 4
  * DEV: add new package rdiffbackup.locations for directory and
  repository modules.
  * DEV: add requirements.txt to help GitHub detect our dependencies and
  warn about security flaws, closes 434
  * DEV: all API interfaces are marked directly in the code with API to
  simply recognition while coding.
  * DEV: document docstrings and import recommendations.
  * DEV: documented that compatibility functions are to have a postfix
  `_compat<API>`.
  * DEV: Explain or remove many asserts throughout the code, closes 398
  * DEV: fix issue in ACL tests when user isn't named like group
  * DEV: increase crossversion check to old version 2.0.5
  * DEV: introduction of an 'actions' plug-in interface described in the
  architecture documentation.
  * DEV: Make flake8 check python scripts and simplify
  rdiff-backup-statistics
  * DEV: make it easier to use and test rdiff-backup directly from the
  Git repo under Windows using Vagrant
  * DEV: man page can be generated from markdown
  * DEV: migrate from Travis-CI (thanks for all the fish) to GitHub
  actions for our CI/CD pipeline
  * DEV: pin specific version of pyenv-win in Travis CI so that changes
  don't make the pipeline without control
  * DEV: prefix all internal functions, variables and classes with
  underscore to get more clarify in the code
  * DEV: reduce max complexity to 20 by simplfiying more functions,
  mostly using mapping dictionaries
  * DEV: reduce max complexity to 30 and rename CompareRecursive to
  compare_recursive.
  * DEV: Re-write tox.ini to make sure that also sub-processes are part
  of the coverage calculation, raises test coverage above 80%
  * DEV: TempFile.new(\_in_dir) is replaced by RPath.get_temp_rpath
  * DEV: there is a new namespace 'rdiffbackup' for new/clean code
  according to strategy.
  * DOC: add architecture documentation for better understanding of the
  overall code structure
  * DOC: add hint on how to use batch file under Windows
  * DOC: add how to use Microsoft's OpenSSH from 32-bits rdiff-backup,
  closes 494, closes 496
  * DOC: clarify in the man page(s) that only slashes are allowed in
  selection patterns under Windows, closes 531
  * DOC: clarify selection principles in man-page that pattern matching
  doesn't resolve relative vs. absolute paths and that it is done on the
  complete path, closes 533
  * DOC: clarify that the host part belongs together with the double
  colons, closes 480
  * DOC: comparaison of old and new Command Line Interface added to the
  migration documentation
  * DOC: comparaison of old and new Command Line Interface added to the
  migration documentation
  * DOC: docs/migration.md describes how to install rdiff-backup side by
  side and use old versions 'forever', closes 523
  * DOC: document how to use Putty as SSH client thanks to xastor in 496
  * DOC: document more clearly that rdiff-backup 1.x and 2.x are
  incompatible, closes 513
  * DOC: explain the prefixes used in the changelog with focus on
  potentially incompatible *CH*an*G*es, closes 436
  * DOC: make the installation instructions for other Linux and UN*X-OID
  e.g. BSD systems using PyPI more complete, considering build
  dependencies. Closes 487
  * DOC: man page has been clarified regarding \--no-hard-links option
  * FIX: avoid breaking on non-readable files, causing ListError, closes
  34, closes 245
  * FIX: avoids MemoryError on Windows when compiling for 64 bits, closes
  453
  * FIX: cross device link error on ZFS with project quota, closes 519
  (522)
  * FIX: get rid of spurious resource warnings due to subprocess still
  running, closes 165
  * FIX: longnames are correctly reversed when regressing a failed
  back-up, closes 9
  * FIX: PID handling when process is interrupted now works properly
  under Windows.
  * FIX: setting tempdir under Windows might fail with error about mix of
  bytes and str, closes 540
  * FIX: support long paths under Windows 10 v1607 or later, once enabled
  in registry/GPO (see Windows README for details), closes 236
  * FIX: When using the \--remove-older-than option with \--tempdir, the
  \--tempdir
  * NEW: both 32 and 64 bits version of rdiff-backup are now built for
  Windows
  * NEW: new action 'info' to output system information, try
  'rdiff-backup info'
  * NEW: option \--api-version to explicitly set the actual API version,
  maximum version is 201, default is 200, compatible with 2.0.x
  * NEW: rdiff-backup has a `--help` parameter, closes 280
  * NEW: rdiff-backup has a new interface with actions and sub-options,
  use `--new --help` to get the help
  * NEW: rdiff-backup has the concept of API version between client and
  server
  * NEW: rdiff-backup-statistics has \--help and \--version options
  * NEW: the current rdiff-backup version can be used in the remote
  schema with 'x.y.z' being split as placeholders '{vx}', '{vy}', '{vz}'
  so that one can install (via pip) and use a specific major/minor
  version of rdiff-backup (see the migration docs for details).
  
  Authors
  
  * Andrea Veri
  * dgasaway
  * Eric L
  * Felix Yan
  * Patrik Dufresne
  * t9t

2.0.5

--------------------------
  
  Changes
  
  * CHG: development status now set to stable in PyPI classifiers
  * CHG: increased version of bundled Python Windows version from 3.7.5
  to 3.7.7. (426)
  * DEV: add measurement of test coverage to tox.ini and limit to 70% for
  further improvement, closes 113
  * DEV: make CI pipeline faster by joining small jobs together to avoid
  VM creation overhead.
  * DOC: add few development notes about profiling rdiff-backup for time
  and memory consumption
  
  Authors
  
  * Eric L

2.0.4rc0

-----------------------------
  
  Changes
  
  * CHG: explicitly refuse to back-up to exFAT because it doesn't handle
  properly case insensitive deletion of files, closes 38
  * CHG: setuptools is a runtime dependency for installation and tests so
  that version appears correctly instead of DEV, closes 305
  * CHG: testing explicitly for existence of tempdir might make certain
  setups fail now because tempdir was silently ignored
  * DEV: Add a misc script to setup an ArchLinux as development platform
  * DEV: add a new Vagrant configuration to do some smoke tests between
  the current/development version and any older one
  * DEV: Add samba server with pre-defined shares to Windows vagrant
  setup to allow for more extensive tests on shares
  * DEV: fix compatibility in rollsum and sum-size with rdiff 2.2/2.3
  leading to errors in librsynctest, closes 304
  * DEV: function rpath.getdevnums now also returns the device type,
  block or char
  * DEV: replace deprecated xattr.<verb>xattr with xattr.<verb> function,
  closes 177
  * DOC: added clearer instructions for installing weak dependencies to
  support ACLs and EAs under CentOS and RHEL
  * DOC: fix semi-broken nongnu.org links in manpages of rdiff-backup and
  rdiff-backup-statistics
  * FIX: add python3-setuptools as a run time dependency to Debian
  package so --version works and doesn't output DEV, closes 305.
  * FIX: address `PY_SSIZE_T` deprecation warning appearing under Python
  3.8 in the C code, closes 374
  * FIX: avoid error module 'errno' has no attribute 'EDEADLOCK' under
  MacOSX, closes 366
  * FIX: avoid issue with backslash at the end of file path under
  Windows, closes 395
  * FIX: avoid TypeError: a bytes-like object is required, not 'str' when
  logging error message by fixing encoding, closes 380
  * FIX: explicitly test existence of tempdir and avoid "Can't mix
  strings and bytes in path components" error, closes 367
  * FIX: failed on certain device files with no such file or directory
  error, closes 401
  * FIX: Force encoding of log file to be UTF-8 on all platforms and be
  lenient to avoid codec errors on logging, closes 356
  * FIX: Improve handling of files in use under Windows, closes 392
  * FIX: more meaningful error message when trying to test-server a local
  path, closes 396
  
  Authors
  
  * Andreas Olsson
  * Eric L
  * Jirka Vejrazka
  * Neha S
  * Otto Kekäläinen
  * Patrik Dufresne

2.0.3

--------------------------
  
  Changes
  
  * CHG: multimedia files with extensions ogv, oga, ogm and mkv aren't
  compressed any more.
  * CHG: Rename CHANGELOG to CHANGELOG.md, format to markdown and fix
  references, closes 279
  * FIX: handle properly include/exclude files with Windows/DOS endings,
  closes 357
  
  Authors
  
  * Eric L
  * Jannis
  * Patrik Dufresne

2.0.1rc0

-----------------------------
  
  Changes
  
  * CHG: return error code 2 instead of number of failed files during
  repo verification to have a consistent return code (1 would be any
  other kind of error, or 0 if everything is well), closes 338
  * FIX: Added backticks to `<file>` in develop docs so missing word is
  shown, closes 303
  * FIX: allow again to backup from and to Windows shares, closes 337
  * FIX: avoid bytes/str object issue under MacOS/X while checking forks
  FS abilities, closes 320
  * FIX: avoid charmap encoding errors during logging on Windows due to
  extended characters, closes 344
  * FIX: avoid IndexError: string index out of range error when using
  accentuated characters in exclude/include patterns, closes 340
  * FIX: avoid test error when using librsync >= 2.2 by adding -R rollsum
  to rdiff call in librsynctest, closes 304
  * FIX: fail with meaningful error message on metadata mirror files with
  duplicate timestamps, closes 322
  * FIX: sequence of exception leading to abort when logging tuple of
  bytes because of unreachable directory, closes 310
  * NEW: Create a new rdiff-backup-delete script which can remove a file
  and all its history from a backup repository (use with care).
  * NEW: option --allow-duplicate-timestamps to only warn about duplicate
  timestamps in metadata mirror files, use this option with care and only
  to clean an impacted backup repository.
  * DOC: add Fedora and RHEL to installation instructions, and evoke
  Raspbian, closes 316
  * DOC: Update installation steps to make them clearer to users
  * DOC: improved installation and contributors documentation
  * DEV: clarify version tag pattern and their influence on releases,
  closes 326
  * DEV: much better automated installation of Windows development VM via
  Vagrant/Ansible
  * DEV: errorsrecovertest test script to test recovering from old errors.
  
  Authors
  
  * albert-github
  * dominicraf
  * Eric L
  * Otto Kekäläinen
  * Patrik Dufresne
  * Trevor Harmon

2.0.0

--------------------------
  
  Changes
  
  * FIX: Add workaround to avoid error when backup directory is under the
  source directory (see issue 296), there is a warning but the backup
  can succeed.
  * FIX: bytestotime() should return None on decode failure (Closes 295)
  * NEW: add a unit test for bytestotime() in order to avoid a regression
  like issue 295.
  
  Authors
  
  * Eric L
  * zjw

1.9.2rc0

-----------------------------
  
  Changes
  
  * FIX: UpdateError: Updated mirror temp file does not match source,
  Closes 237
  * CHG: Add new logo and improve visual appeal of the README (Closes:
  286) (287)
  * NEW: Add Windows developments documentations, closes 220
  * FIX: do not fail when starting with uid/gid equal to maximum, avoid
  OverflowError on os.chown
  
  Authors
  
  * Eric L
  * Patrik Dufresne
  * zjw

1.9.1b0

----------------------------
  
  Changes
  
  * FIX: remove too specific Debian packages from GitHub deployment,
  closes 263
  * NEW: add a new tool to help generate the changelog (description in
  DEVELOP.md)
  * DOC: new release rules and procedure added to docs/DEVELOP.md
  * FIX: avoid double unquoting of increment file infos, closes 266
  * FIX: versioning of Debian packages follows without glitch the overall
  tag based versioning.
  * DEV: automate via Travis deployment pipeline release to PyPI and Test
  PyPI.
  * FIX: remove some more ugly bytes output in strings using _safe_str,
  closes 238
  * FIX: added and moved hardlinks were not correctly counted and
  restored, Closes 239
  * FIX: rdiff-backup complained about missing SHA checksums of
  hardlinks, Closes 78
  * FIX: avoid int is not iterable error when calling remote command on
  Windows
  * DEV: flake8 checks only setup.py, src, testing and tools code.
  * NEW: add support for SOURCE_DATE_EPOCH to override the build date,
  making reproducible builds possible.
  * NEW: sparse files are handled more efficiently, if not compressed and
  depending on file system
  
  Authors
  
  * Bernhard M. Wiedemann
  * Eric L
  * Otto Kekäläinen
  * Patrik Dufresne
  * Stefan Seyfried
  * zjw

1.9.0b0

----------------------------
  
  Different bug fixes, improvements in code and documentation - too many to list
  (Andreas Olsson, Andrew Foster, Arrigo Marchiori, bigbear3001, davekempe,
  David I. Lehn, elMor3no, Eric Lavarde, Frank Crawford, Jiri Lunacek, joshn, Josh Soref,
  mestre, Oliver Lowe, orangenschalen, Otto Kekäläinen, owsla, Patrik Dufresne, Reio Remma,
  Rodrigo Silva, Stefan Seyfried, Wes Cilldhaire, zjw)
  
  Add automated of different package formats (Otto Kekäläinen, Arrigo Marchiori, Eric Lavarde)
  
  Add RDIFF_BACKUP_VERBOSITY environment variable (Eric Lavarde)
  
  Add support for Python 3.5 to 3.8, remove support for Python 2.x (Eric Lavarde)
  
  Fix OverflowError on 64-bit systems when backing up symlinks with uid or gid
  above INT_MAX. Thanks to Michel Le Cocq for the bug report. (Andrew Ferguson)
  
  Start using Unicode internally for filenames. This fixes Unicode support
  on Windows (Josh Nisly)
  
  Don't print "Fatal Error" if --check-destination-dir completed successfully.
  Thanks to Serge Zub for the suggestion. (Andrew Ferguson)
  
  Allow --test-server option to be combined with --restrict. Thanks to Nick
  Moffitt for reporting the error. Closes Ubuntu bug  349072. (Andrew Ferguson)

1.3.3

---------------------------
  
  Improve handling of incorrect permissions on backup repository during restore
  operation. Closes Ubuntu bug 329722. (Andrew Ferguson)
  
  Don't crash on zlib errors. Closes Debian bug 518531. (Andrew Ferguson)
  
  Make sticky bit warnings quieter while determining file system abilities.
  Closes Savannah bug 25788. (Andrew Ferguson)
  
  Fix situation where destination file cannot be opened because of an access
  error. Thanks to Dean Cording for the bug report. (Andrew Ferguson)
  
  Fix --compare-hash options on Windows. Thanks to Serge Zub for the fix.

1.3.2

---------------------------
  
  Don't crash when filesystem can't set ACL. Thanks to Matt Thompson for the bug
  report. (Andrew Ferguson)
  
  Fix Security Error when performing non-backup operations on Windows. Thanks to
  Tommy Keene for the bug report. (Andrew Ferguson)
  
  Properly disable hardlinks by default on Windows.
  
  Fix Python 2.2 compatibility. Closes Savannah bug 25529. (Andrew Ferguson)
  
  Fix typo which caused failure when checking if another rdiff-backup process is
  running on Windows. Thanks to Ryan Hughes for the bug report. (Andrew Ferguson)
  
  Disable hardlinks by default on Windows when performing operations such as
  --compare, etc. Thanks to Ryan Hughes for the bug report. (Andrew Ferguson)
  
  Change --min-file-size and --max-file-size to agree with man page. These
  options no longer include files, and will only apply to regular files. Thanks
  to Johannes Jensen for the suggestion. (Andrew Ferguson)
  
  Improve error message if regress operation fails due to Security Violation.
  Thanks to Grzegorz Marszalek for the bug report. (Andrew Ferguson)

1.3.1

---------------------------
  
  Improve support for handling too long filenames under Windows. Too long
  directory names and paths are still a problem. (Andrew Ferguson)
  
  Print more helpful error messages when the remote command cannot be started
  on Windows. Thanks to Dominic for the bug report. (Andrew Ferguson)
  
  Fix --test-server option when used with remote Windows clients. Thanks to
  Thanos Diacakis for testing. (Andrew Ferguson)
  
  Fix --override-chars-to-quote option. (Andrew Ferguson)
  
  Fix typo in robust.py which broke error reporting. Closes Savannah bug 25255.
  
  Ignore Windows errors caused by too long filenames; the files are not yet
  backed-up, but the backup process is no longer halted. (Andrew Ferguson)

1.3.0

---------------------------
  
  New option: --use-compatible-timestamps, which causes rdiff-backup to use - as
  the hour/minute/second separator instead of :. Enabled by default on systems
  which require : to be escaped. (Oliver Mulatz)
  
  Allow rdiff-backup to backup files which it cannot read, but can change
  the permissions of. (Andrew Ferguson)
  
  Take start and end times from same system so that the elapsed time printed in
  the statistics is not affected by time zone. (Andrew Ferguson)
  
  Properly fix escaping DOS devices and trailing periods and spaces; now supports
  native Windows and Linxu/FAT32. (Andrew Ferguson)

1.2.4

---------------------------
  
  Disable escaping trailing spaces and periods for now since it broke remote
  restores. Thanks to Dominic for reporting the issue. (Andrew Ferguson)

1.2.3

---------------------------
  
  The official Windows build now includes the librsync patch for files > 4GB.
  This requires the Visual C++ 2008 redistributable, available from Microsoft.
  
  The epoch is now a valid date. Closes Savannah bug 24814. (Andrew Ferguson)
  
  Report that connection has dropped if filesystem operation returns ENOTCONN.
  Closes Ubuntu bug 219920. (Andrew Ferguson)
  
  Print a more helpful error message if we get an error while reading an old
  current_mirror marker. This can happen because it has been locked or deleted
  by a just-finished rdiff-backup process. Closes Ubuntu bugs 88140 and
  284506. (Andrew Ferguson)
  
  Do not backup reparse points on native Windows. Thanks to John Covici for
  reporting the issue. (Andrew Ferguson)
  
  Support comments in rdiff-backup's ACL files and quote the quoting character
  properly if user changed it. (Patch from Oliver Mulatz)
  
  Print a more helpful error message if we cannot read the backup destination.
  Closes Ubuntu bug 292586 (again). (Andrew Ferguson)
  
  Print a more helpful error message if we cannot write to the backup
  destination. (Andrew Ferguson)
  
  Add ETIMEDOUT to the list of recoverable errors; when irrecoverable, a
  ConnectionError is raised. Closes Ubuntu bug 304659. (Andrew Ferguson)
  
  Suppress warnings about the deprecated sha module in Python 2.6. We'll remove
  this after rdiff-backup is ported to Python 3. (Patch from Josh Nisly)
  
  Test for symlink permissions now produces a functioning symlink. Thanks to
  Julien Poffet for reporting the issue. (Andrew Ferguson)
  
  Fix for crash when deleting read-only files on Windows. (Patch from Josh Nisly)
  
  Fix for Python 2.2 in win_acls.py (Closes Savannah bug 24922).
  
  Throttle verbosity of listattr() warning messages from 3 to 4. (Andrew Ferguson)
  
  Escape trailing spaces and periods on systems which require it, such as
  Windows and modern Linux with FAT32. (Andrew Ferguson)
  
  Print nicer error messages in rdiff-backup-statistics (without tracebacks).
  Closes Ubuntu bug 292586. (Andrew Ferguson)
  
  Properly handle EINVAL "Invalid argument" errors when setting extended
  attributes. Thanks to Kevin Fenzi for reporting the issue. (Andrew Ferguson)
  
  Add warning message if pyxattr is below version 0.2.2. (Andrew Ferguson)
  
  Add "Stale NFS file handle" (ESTALE) to the list of recoverable errors. Thanks
  to Guillaume Vachon for reporting the issue. (Andrew Ferguson)
  
  Workaround for broken support for symlink extended attributes in pyxattr <
  0.2.2. Thanks to Leo Bergolth for reporting the issue. (Andrew Ferguson)
  
  Handle ELOOP ("Too many levels of symbolic links") error when reading extended
  attributes from symlinks. Closes Savannah bug 24790. (Andrew Ferguson)
  
  Inform the user of which file has failed if an exception occurs during a
  rename operation. (Andrew Ferguson)

1.2.2

---------------------------
  
  Automatically resume after a failed initial backup. (Patch from Josh Nisly)
  
  Improve compatibility between Unix and remote native Windows client. It is now
  possible to use SSH daemons other than Putty on Windows. (Andrew Ferguson)
  
  Print a more informative error message if the user's remote shell prints
  extraneous information before rdiff-backup runs. (Andrew Ferguson)
  
  Don't backup Windows ACLs if the --no-acls option is specified. Thanks to
  Richard Metzger for reporting the issue. (Andrew Ferguson)
  
  Add error handling and logging to Windows ACL support; fixes Windows backup to
  SMB share. Improve test in fs_abilities to determine if Windows ACLs are
  supported. (Andrew Ferguson)
  
  Add a warning message if extended attributes support is broken by the
  filesystem (such as with older EncFS versions). (Andrew Ferguson)
  
  Improve handling of Windows ACLs by switching to API functions which
  understand inherited ACEs; fixes support for Windows 2000. (Andrew Ferguson)
  
  Support extended attributes on symbolic links. (Andrew Ferguson)
  
  On Mac OS X, read the com.apple.FinderInfo extended attribute since it is the
  only storage location for the 'busy' (Z) Finder attribute. (Andrew Ferguson)
  
  Properly fix "AttributeError: RPath instance has no attribute 'inc_compressed'"
  bug. Fix in 1.1.12 was in correct place, but wrong solution. (Andrew Ferguson)
  
  Improve support for Python 2.5, which refactored the built-in exceptions so
  that SystemExit and KeyboardInterrupt no longer derive from Exception.
  Closes support request 106504. (Andrew Ferguson)
  
  Adjust --exclude-if-present option to support directories, symlinks, device
  files, etc. Closes bug 24192. Thanks to Vadim Zeitlin for the suggestion.

1.2.1

---------------------------
  
  Produce a new binary for Windows which includes the Python for Windows
  Extensions. Thanks to Shohn Trojacek for reporting the problem.
  
  Disable hardlinks by default when backup source or restore destination is
  on Windows. (Andrew Ferguson)
  
  Properly catch KeyboardInterrupt on Python 2.5. (Andrew Ferguson)
  
  Don't crash if a CacheIndexable tries to clear a non-existent cache entry,
  since the entry must already be cleared. (Andrew Ferguson)

1.2.0

---------------------------
  
  Fall back on the Python make_file_dict function when the filename contains
  non-ASCII characters. (Andrew Ferguson)
  
  Ignore Extended Attributes which have Unicode characters outside the current
  system representation. These will be correctly handled when rdiff-backup
  switches to Python 3, which will have full Unicode support. (Andrew Ferguson)

1.1.17

---------------------------
  
  Move make_file_dict_python so that it is run on the remote end instead of
  the local end. This improves performance for Windows hosts since it eliminates
  the lag due to checking os.name. It also makes the Windows design parallel
  to the Posix design, since the Windows method now returns a dictionary across
  the wire. (Andrew Ferguson)
  
  Catch EPERM error when trying to write extended attributes. (Andrew Ferguson)
  
  Allow rdiff-backup to be built into a single executable on Windows using
  py2exe ("setup.py py2exe --single-file"). (Patch from Josh Nisly)
  
  Properly handle uid/gid comparison when the metadata about a destination
  file has become corrupt. Closes Debian bug 410586. (Andrew Ferguson)
  
  Properly handle hardlink comparison when the metadata about a destination
  hardlink has become corrupt. Closes Debian bug 486653. (Andrew Ferguson)
  
  Fix typo in fs_abilities noticed by Martin Krafft. Add EILSEQ ("Invalid or
  incomplete multibyte or wide character") to the list of recoverable errors.
  Thanks to Hanno Stock for catching that. (Andrew Ferguson)
  
  Catch another reasonable error when reading EAs. (Andrew Ferguson)
  
  Use the Python os.lstat() on Windows. (Patch from Josh Nisly)
  
  Support for Windows ACLs. (Patch from Josh Nisly and Fred Gansevles)
  
  Fix user_group.py to run on native Windows, which lacks grp and pwd Python
  modules. (Patch from Fred Gansevles)
  
  Optimize --check-destination and other functions by determining the increment
  files server-side instead of client-side. (Patch from Josh Nisly)
  
  Actually make rdiff-backup robust to failure to read an ACL because the file
  cannot be found. (Andrew Ferguson)
  
  Get makedist working on Windows. (Patch from Josh Nisly)

1.1.16

---------------------------
  
  Properly preserve hard links when the destination does not support them.
  Thanks to Andreas Olsson for noticing the problem. (Andrew Ferguson)
  
  Fix another case where rdiff-backup fails because it has insufficient
  permissions on a file it owns. Thanks to Peter Schuller for the test
  case. (Andrew Ferguson)
  
  Don't abort if can't read extended attributes or ACL because the path is
  considered bad by the EA/ACL subsystem; print a warning instead. Problem
  reported by Farkas Levente. (Andrew Ferguson)
  
  rdiff-backup-statistics enhancements suggested by James Marsh: flush stdout
  before running other commands, and add a --quiet option to suppress printing
  the "Processing statistics from session..." lines. (Andrew Ferguson)
  
  Don't set modification times for directories on Windows. Also, assume
  that user has access to all files on Windows since there is no support
  for getuid(). (Patch from Josh Nisly)
  
  Add Windows-specific logic for checking if another rdiff-backup process
  is running. Do not try to handle non-existant SIGHUP and SIGQUIT signals
  on Windows. (Patch from Josh Nisly)
  
  Do not use inode numbers on Windows and gracefully handle attempts to
  rename over existing files on Windows. (Patch from Josh Nisly)
  
  Finally fix 'No such file or directory' bug when attempting to regress after
  a failed backup. (Patch from Josh Nisly)
  
  Improve Unicode support by escaping Unicode characters in filenames
  when printing them in log messages from eas_acls.py. (Fix from
  Saptarshi Guha)
  
  Handle Windows' lack of getuid(), getgid(), hardlinks and symlinks in
  fs_abilities.py. Use subprocess.Popen() on Windows since it does not support
  os.popen2(). (Patch from Josh Nisly)
  
  Let setup.py accept arguments on Windows. (Patch from Josh Nisly)
  
  Get cmodule.c building natively on Windows. (Patch from Josh Nisly)
  
  Don't give up right away if we can't open a file. Try chmod'ing it even
  if we aren't root or don't own it, since that can sometimes work on AFS
  and NFS. Closes Savannah bug 21202. (Andrew Ferguson)
  
  Correctly handle updates to nested directories with unreadable permissions.
  Thanks to John Goerzen for the bug report. Closes Debian bugs 389134 and
  411849. (Andrew Ferguson)
  
  Manpage improvements from Justin Pryzby.
  
  Improve the handling of directories with many small files when backing-up
  over a network connection. Thanks to Austin Clements for the test case.
  (Andrew Ferguson)
  
  Change high-bit permissions test to check both files and directories.
  Improves rdiff-backup's support for AFS and closes Debian bug 450409.
  (Patch from Marc Horowitz)
  
  rdiff-backup-statistics now supports quoted repositories. Closes Savannah
  bug 21813. (Andrew Ferguson)
  
  Add EBADF to the list of recoverable errors when fsync() is called. This
  fixes an rdiff-backup error on AIX and IRIX. Closes Savannah bug 15839.
  (Fix from Peter O'Gorman)
  
  Properly initialize new QuotedRPaths. Fixes --list-at-time, etc. when
  the target is remote. (Andrew Ferguson)

1.1.15

---------------------------
  
  New feature: If quoting requirements change, rdiff-backup can requote the
  entire repository if user specifies the --force option. (Andrew Ferguson)
  
  Don't print the warning message about unsupported hard links if the user
  has specified the --no-hard-links option. (Suggested by Andreas Olsson)
  
  Print a more helpful error message when we get a "Result too large"
  error when trying to copy a file. (Andrew Ferguson)
  
  Fix bug where rdiff-backup fails after all increments are removed. Closes
  Savannah bug 20291. (Andrew Ferguson)
  
  Don't assume that a file cannot be read simply becasue of the access
  permissions -- eg, NFS with (rw,all_squash) options. Closes Savannah
  bug 21202. (Based on patch from Marc Horowitz)
  
  restore_set_root should check if it can read a particular directory
  before checking if "rdiff-backup-data" is contained in it. Closes
  Savannah bug 21106. (Patch from Alex Chapman)
  
  Regress.restore_orig_regfile should check if directories can be fsync'd
  before doing so. Fixes Savannah bug 21546. (Patch from Marc Horowitz)
  
  Rewrite quoting logic to independently check for escaping Windows special
  characters, non-ASCII chars, and uppercase chars. (Andrew Ferguson)
  
  Permit Unicode log messages. (Andrew Ferguson)

1.1.14

---------------------------
  
  New release to work around Python bug. EFTYPE is not defined in Python's
  errno module, but is necessary to check on BSD's. (Andrew Ferguson)

1.1.13

---------------------------
  
  Properly pickle QuotedRPaths. Fixes regress operation on quoted filesystems.
  Closes Savannah bug 20570 reported by Morgan Read. (Andrew Ferguson)
  
  Warn if can't write extended attribute. (Andrew Ferguson)
  
  Gracefully handle situations where rdiff-backup tries to set the sticky
  bit on non-directory files on systems that don't support that action.
  Thanks to Jim Nasby for the bug report. (Andrew Ferguson)
  
  Prevent the extended filenames / UTF-8 test from raising an exception
  on broken CIFS configurations which transform some characters to '?'.
  Problem reported by Luca Cappe. (Andrew Ferguson)
  
  Cygwin on FAT32 hangs when trying to open a file named "aux". Change
  the escape DOS devices test to use "con" instead. (Andrew Ferguson)
  
  Fix symlink behavior when filesystem is mounted via CIFS. Closes
  Savannah bug 20342. (Andrew Ferguson)
  
  Fix "too many open files" bug when handling large directories. Patch
  from Anonymous in Savannah bug 20528.
  
  New options: --tempdir and --remote-tempdir. The first one sets the
  directory that rdiff-backup uses for temporary files on the local system.
  The second adds the --tempdir option with the given path when invoking
  rdiff-backup on remote systems. (Andrew Ferguson)
  
  Don't run the extended attributes test if rdiff-backup is run with
  the --no-eas option. Prevents hang in isolated cases. (Andrew Ferguson)
  
  Don't throw an error when clearing extended attributes if they are not
  supported on the file. (Andrew Ferguson)

1.1.12

---------------------------
  
  Use .dll as library file extension on Cygwin and Windows. (Andrew Ferguson)
  
  Avoid setting permissions to 000 because they're out of sync. (Andrew Ferguson)
  
  listxattr() can also throw EPERM error if not supported. (Andrew Ferguson)
  
  Do something sensible if we get an IOError while trying to appropriately
  log another exception. (Andrew Ferguson)
  
  Handle exception when get permission denied on a file while trying
  to establish case sensitivity on read-only side. (Andrew Ferguson)
  
  Finally solve AttributeError due to no 'inc_compressed' attribute
  that occured during some regress operations. (Andrew Ferguson)
  
  Squash bug where --check-destination-dir or regress operation failed
  after crash when --force option was not used. RPath's are now
  properly pickled. (Andrew Ferguson)
  
  Workaround for tempfile.TemporaryFile() having different behavior
  on Windows/Cygwin. (Andrew Ferguson)
  
  Make --check-destination-dir handle quoted situations. (Andrew Ferguson)
  
  Handle quoted current_mirror markers and clean-up the listing of
  increments with quoted names. (Andrew Ferguson)
  
  Warn if file modification time is before 1970. (Andrew Ferguson)

1.1.11

---------------------------
  
  Fix typo in Main.py introduced in 1.1.9 (Andrew Ferguson)
  
  FIFOs don't have extended attributes -- don't try to access them.
  (Andrew Ferguson)
  
  Fix for bug 19612 -- Incorrect line broke --no-compression option.
  (Fix by Thiago in bug comment)
  
  Fix for bug 19896 -- symlink() doesn't work on a CIFS-mounted Windows
  share.  (Jonathan Hankins)
  
  Fix for bug 19895 -- eliminate traceback for special file detection
  on CIFS mounts.  (Jonathan Hankins)

1.1.10

---------------------------
  
  New --exclude-if-present option (i.e. --exclude-if-present .nobackup).
  (Jeff Strunk).
  
  Use signal 0 rather than signal.NSIG when testing if another rdiff-backup
  is still running.  (Patch from Sébastien Maret)
  
  Sockets don't have extended attributes -- don't try to access them.
  (Patch from Andrew Ferguson.)
  
  Fix restore from read-only bug -- rx perms on a repository directory are
  enough, no need for write perms when restoring.  (patch from Andrew Price)
  
  Fix --list-increments bug in set_must_escape_dos_devices.
  (Marc Dyksterhouse)

1.1.9

--------------------------
  
  Cygwin generates OSError when changing permissions on partitions.
  (Patch from Andrew Ferguson.)
  
  Fix fs_abilities.py patch error with set_escape_dos_devices.
  (Marc Dyksterhouse)
  
  Glob escaping support via backslash.  (Andrew Price)

1.1.8

--------------------------
  
  Cygwin generates EACCESS on fsync -- so accept it rather than dieing.
  (Marc Dyksterhouse).
  
  Add "FilenameMapping.set_init_quote_vals" security exception.
  (Marc Dyksterhouse)
  
  Escape DOS device filenames when necessary.  Adjust DOS filename
  quoting to work properly with cygwin.  (Marc Dyksterhouse)
  
  Allow for preservation of FinderInfo for folders and fix typo
  in Time.py. (Patch from Andrew Ferguson.)
  
  Test for symlink permissions support to avoid unnecessary syscalls on
  platforms that don't support them. (Patch from Andrew Ferguson.)
  
  RPM specfile update from Gordon Rowell.

1.1.7

--------------------------
  
  Fix showstopper problem on OSX handling pre-1.1.6 rdiff-backup metadata.
  (Patch from Andrew Ferguson.)

1.1.6

--------------------------
  
  Man page update from roland <devzeroweb.de>.
  
  --min-file-size/--max-file-size support.  (Patch from Wout Mertens.)
  
  Mac OS X Extended Attributes support.  (Patch from Andrew Ferguson.)
  
  Preserve Mac OS X 'Creation Date' field across backups.  (Patch from Andrew
  Ferguson.)
  
  Set symlink permissions properly.  (Patch from Andrew Ferguson.)
  
  Selection fix: empty directories could sometimes be improperly
  excluded if certain include expressions involving a non-trailing '**'
  were used.  Bug reported by Toni Price.
  
  A few minor changes to help rdiff-backup back up to an SMB/CIFS share.
  Thanks to Cengiz Gunay for testing.
  
  Fix a traceback due to an off-by-1 error in "--remove-older-than nB".
  
  Fix a security violation when restoring from a remote repository.
  (Patch from Charles Duffy.)
  
  Added times like "Mon Jun 5 11:00:23 1997" to the recognized time
  strings.  (Suggested by Wolfgang Dautermann.)

1.1.5

--------------------------
  
  rdiff-backup will now exit by default if it thinks another
  rdiff-backup process is currently working on the same repository.
  
  Empty error_log, mirror_metadata, extended_attribute, and
  access_control_lists files will no longer be gzipped (suggestion by
  Hans F. Nordhaug).
  
  Fix for restoring files in directories with really long names.
  
  Added supplementary rdiff-backup-statistics utility for parsing
  rdiff-backup's statistics files (originally based off perl script by
  Dean Gaudet).
  
  rdiff-backup should now use much less memory than v1.1.1-1.1.4 if you
  have lots of hard links.

1.1.4

--------------------------
  
  Quoting should be enabled only as needed between case-sensitive and
  non-case-sensitive systems (thanks for Andrew Ferguson for report).
  
  Files with ACLs will not be unnecessarily marked as changed (bug
  report by Carsten Lorenz).
  
  Fix for common KeyError bug introduced in v1.1.3.

1.1.3

--------------------------
  
  Regression metadata bug introduced with 1.1.1/1.1.2 fixed.
  
  rdiff-backup should now give a clean error message (no stack traces!)
  when aborted with control-C, killed with a signal, or when the
  connection is lost.
  
  When removing older than, delete empty increments directories
  
  Long filename bug finally fixed (phew).  rdiff-backup should now
  correctly mirror any file that it can read.
  
  Due to very detailed error report from Yoav, fixed a "Directory not
  empty" error that can arise on emulated filesystems like NFS and
  EncFS.
  
  Cleaned up remove older than report, and also stopped it from deleting
  current data files if you specify a time later than the current
  mirror.

1.1.2

--------------------------
  
  This version corrects a packaging error in v1.1.1, which was totally
  broken.

1.1.1

--------------------------
  
  rdiff-backup now writes SHA1 sums into its mirror_metadata file for
  all regular files, and checks them when restoring.
  
  The above greatly increases the size of the mirror_metadata files, so
  diff them for space efficiency, as suggested by Dean Gaudet.
  
  Added two new comparison modes: full file (using the --compare-full or
  --compare-full-at-time) or by hash (--compare-hash and
  --compare-hash-at-time).
  
  Applied Alec Berryman's patch to update the no-compression regexp.
  
  Alec Berryman's fs_abilities patch is supposed to help with AFS.
  
  Fixed filename-too-long crash when quoting.
  
  Patched carbonfile support, re-enabled it by default.

1.1.0

--------------------------
  
  Refactored fs_abilities for more flexibility.  In particular, avoid
  quoting if both source and destination file systems are
  case-insensitive.
  
  Increased buffer sizes by factor of 4, because everyone probably has 4
  times as much RAM now as when I originally picked those values.
  
  When possible, fsync using a writable file descriptor.  This may help
  with cygwin.  (Requested/tested by Dave Kempe.)
  
  Support req 104755: Added --preserve-numerical-ids option, which makes
  rdiff-backup preserve uids/gids instead of unames/gnames.  (Suggested
  by Wiebe Cazemier)
  
  Fix for bug 14799 reported by Bob McKay:  Crash when backing up files
  with high permissions (like suid) to some FAT systems.

1.0.2

--------------------------
  
  Fix for spurious security violation from --create-full-path (reported
  by Mike Bydalek).
  
  Fix for bug 14545 which was introduced in version 1.0.1:  Quoting
  caused a spurious security violation.  (Important for Mac OS X)
  
  An error reading carbonfile data on Mac OS X should no longer cause a
  crash.  (Thanks to Kevin Horton for testing.)
  
  Carbonfile support now defaults to off, even if the system appears to
  support it.  It can be manually enabled with the --carbonfile switch.
  If you know something about Mac OS X and want to look at the
  carbonfile code so it can be re-enabled by default, please do so :)
  (help available from list)

1.0.1

--------------------------
  
  Fix for "'filetype' of type exceptions.KeyError" error when restoring.
  Test case provided by Davy Durham.  (The problem was the
  mirror_metadata file could become un-synced when a file is deleted
  when rdiff-backup is running and later the directory that file is in
  gets deleted.)
  
  Librsync signature blocksize now based on square root of file length.
  
  rdiff-backup now writes its PID to current_mirror marker (suggested by
  Kevin Spicer).
  
  fsync_directories defaults to None, to avoid errors in testing
  (suggestion by Charles Duffy).
  
  bug14209: Security bug with --restrict-read-only and
  --restrict-update-only allowed file statting and directory listing
  outside path.  Bug with --restrict option allowed writes outside path.
  (Reported by Charles Duffy.)
  
  bug 14304: Python 2.2 compatibility spoiled by device files.
  
  lchown no longer required, which is good news for Mac OS X 10.3.

1.0.0

--------------------------
  
  Handle cases of junk uid/gids better on 64bit systems.  (Bug report by
  Nick Bailey)
  
  Filenames in the file_statistics*gz files are now quoted the same way
  as filenames in the metadata file (LF => \n and \ => \\).
  
  Fix from Paul P Komkoff Jr for uid typo in text_to_entrytuple.
  
  bug12726: fix regressing of devices while running as non-root -- zero
  length files are created as placeholders.
  
  bug13476: must always compare device numbers when we compare inode
  numbers -- fix a non-fatal problem with hardlinks when a filesystem is
  moved to another device (and the inodes don't change).
  
  bug13475: correct an UpdateError when backing up hardlinks with EAs
  and/or ACLs.
  
  debian bug306798: SELinux security attributes can not be removed and
  rdiff-backup should not fail when it fails to remove them from temp
  files.  fix from Konrad Podloucky.
  
  bug12949: eliminate an exception during fs abilities testing on OS X 10.4.
  fix from Daniel Westermann-Clark.
  
  patch4136: OSX filename/rsrc has been deprecated for some time, and as of OSX

0.13.6

---------------------------
  
  Fixed timezone bug.  Hopefully this is the last one.  (Thanks to
  Randall Nortman for bug report.)
  
  Added fix for listing/restoring certain bad archives made when there
  was a timezone bug.  (Thanks to Stephen Isard)
  
  ************** Serious bug fix ******************
  If a directory in the source directory was replaced by certain
  symlinks, then if later backups failed they could cause files in the
  directory that the symlink pointed to to be deleted!  Much thanks to
  Alistair Popple for pointing this bug out and providing a test case.

0.13.5

---------------------------
  
  Added error-correcting fsync suggestion by Antoine Perdaens.
  rdiff-backup may work better with NFS now.
  
  Fix by Dean Gaudet for --calculate-average mode (it broke somewhere in
  0.13.x).
  
  Fix for regress warning code:  rdiff-backup should warn you if you are
  trying to back up a directory into itself.
  
  Fix for restoring certain directories when not run as root.
  
  Now when determining group permissions check supplementary groups as
  well as main group.  (Bug report by Ryan Castle.)
  
  Fixed bug which could cause crash when backing up 3 or more hard
  linked files and the first gets deleted during processing.  (Thanks to
  Dean Gaudet for bug report.)
  
  Fixed user/group restoring error noticed by Fran Firman.
  
  Checked in Robert Shaw's --chars-to-quote patch
  
  Treated hard link permission problem on Mac OS X by applying
  suggestion by David Vasilevsky
  
  Dean Gaudet's patch fixes "--restrict /" option.
  
  Added Robert Shaw's --exclude-fifo, --include-symbolic-links,
  etc. options.
  
  Added Maximilian Mehnert's fix for too many open files bug.

0.13.4

---------------------------
  
  Checked in patch by John Goerzen to support Mac OS X Finder
  information.  As John says:
  > Specifically, it adds storage of:
  >
  >  * 4-byte creator
  >  * 4-byte type
  >  * integer flags
  >  * dual integer location
  Much thanks to John for adding this useful feature all by himself!
  
  Added --compare and --compare-at-time switches for comparing a
  directory with the backup information saved about it.  Thanks to Erik
  Forsberg, who noticed that this feature was missing.
  
  Regressing and restoring should now take less memory when processing
  large directories (noticed by Luke Mewburn and others).
  
  When regressing, remove mirror_metadata and similar increments first.
  This will hopefully help regressing a backup that failed because disk
  was full (reported by Erik Forsberg).
  
  Fixed remote quoting errors found by Daniel Drucker.
  
  Fixed handling of (lack of) daylight savings time.  Earlier bug would
  cause some files to be marked an hour later.  Thanks to Troels Arvin
  and Farkas Levente for bug report.
  
  Altered file selection when restoring so excluded files will not be
  deleted from the target dir.  The old behavior was technically
  intended and documented but not very convenient.  Thanks to Oliver
  Kaltenecker for bug report.
  
  Fixed error when --restrict path given with trailing backslash.  Bug
  report by Åke Brännström.
  
  Fixed many functions like --list-increments, --remove-older-than,
  etc. which previously didn't work with filename quoting.  Thanks to
  Vinod Kurup for detailed bug report.

0.13.3

---------------------------
  
  Fixed some of the --restrict options which would cause spurious
  violation errors.
  
  --list-changed-since and --list-at-time now work remotely.
  Thanks to Morten Werner Olsen for bug report.
  
  Fixed logic bug that could make restoring extremely slow and waste
  memory.  Thanks for Jacques Botha for report.
  
  Fixed bug restoring some directories when mirror_metadata file was
  missing (as when made by 0.10.x version).
  
  Regressing and restoring as non-root user now works on directories
  that contain unreadable files and directories as long as they are
  owned by that user.  Bug report by Arkadiusz Miskiewicz.  Hopefully
  this is the last of the unreadable file bugs...
  
  Rewrote hard link tracking system.  New way should use less memory.
  
  Fixed bug causing rdiff-backup to crash when backing up from system
  supporting EAs/ACLs to one that didn't.

0.13.2

---------------------------
  
  Change ownership policy and added --user-mapping-file and
  --group-mapping-file switches.  See man page for more information.
  
  Added option --never-drop-acls to cause fatal error instead of
  dropping any acls or acl entries.  Thanks to Greg Freemyer for
  suggestion.
  
  Specified socket type as SOCK_STREAM.  (Error reported by Erik
  Forsberg.)
  
  Fixed bug backing up unreadable regular files and directories when
  rdiff-backup is run by root on the source site and non-root on the
  destination side.  (Reported by Troels Arvin and Arkadiusz
  Miskiewicz.)
  
  If there is data missing from the destination dir (for instance if a
  user mistakenly deletes it), only warn when restoring, instead of
  exiting with error.
  
  Fixed bug in EA/ACL restoring, noticed by Greg Freemyer.
  
  Updated quoting of filenames and extended attributes names to match
  forthcoming attr/facl utilities.  Strange characters should now be
  properly escaped.
  
  Fixed problems with --restrict options that would cause proper
  sessions to fail.  Thanks to Randall Nortman for error report.
  
  Added new time specification by backup number.  So now you can
  '--remove-older-than 2B' or '--list-at-time 0B'.  Original suggestion
  by Alan Bailward.
  
  File examples.html added to distribution; examples section removed
  from man page.
  
  Removed option --no-change-dir-inc-perms.  Instead when copying
  permissions to directory increments, mask with 0777.

0.13.1

---------------------------
  
  Restore of archives made by 0.10.x and earlier fixed, although hard
  link information is not restored unless it is current in the mirror.
  (Bug reported by Jeff Lessem.)
  
  Fixed problem with door files locally when repository is remote.
  (Reported by Robert Weber.)
  
  Patch by Jeffrey Marshall fixes socket/fifo recognition on Mac OS X
  (which apparently has buggy macros).
  
  Patch by Jeffrey Marshall fixes --calculate-average mode, which seems
  to have broken recently.
  
  rdiff-backup should now work and build with python 2.3.  Thanks to
  Arkadiusz Miskiewicz and Arkadiusz Patyk for bug reports and a patch.
  
  rdiff-backup now builds and requires librsync 0.9.6.  This version
  should be much better than the old one and everyone should probably
  upgrade.  Much thanks to Donovan Baarda for all the work that went
  into this release.

0.13.0

---------------------------
  
  To prevent the buildup of confusing and error-prone options, the
  capabilities of the source and destination file systems are now
  autodetected.  Detected features include allowed characters, extended
  attributes, access control lists, hard links, ownership, and directory
  fsyncing.  Options such as --windows-mode, --chars-to-quote,
  --quoting-char, and --windows-restore-mode have been removed.
  
  Now rdiff-backup supports user extended attributes (EAs).  To take
  advantage of this you will need the python module pyxattr and a file
  system that supports EAs.  Thanks to Greg Freemyer for valuable
  discussion.
  
  Support for access control lists (ACLs) was also added.  An ACL
  capable file system and the python package pylibacl (which exports the
  posix1e module) are required.  Thanks to Greg Freemyer for valuable
  discussion.
  
  Thanks to patches by Daniel Hazelbaker, rdiff-backup now reads and
  writes Mac OS X style resource forks!
  
  ****** Warning ****** The above features are new to this development
  release, and it is difficult to test all the possibly combinations of
  source and destination file systems.  They should not be considered
  stable.  However, help would be appreciated testing these new
  features.
  
  ****** Warning 2 ****** rdiff-backup records ACL and EA information
  in files designed to be compatible with the utilities "getfacl" and
  "getfattr".  However, there is a possible security hole in both these
  formats (see
  http://acl.bestbits.at/pipermail/acl-devel/2003-June/001498.html).
  rdiff-backup's format will be fixed when getf{attr|acl}'s is.
  
  Added --list-increment-sizes switch, which tells you how much space
  the various backup files take up.  (Suggested by Andrew Bressen)
  
  Although it should be detected automatically, can avoid copying
  permissions to directory increments with --no-change-dir-inc-perms.
  (Problem on FreeBSD when backing up sticky directories reported by
  Troels Arvin.)
  
  Fixed bug with --check-destination and --windows-mode reported by
  Tucker Sylvestro.
  
  The librsync blocksize is now chosen based on filesize.  This should
  make operations on large files faster (in some cases, orders of
  magnitude faster).  Thanks to Ty! Boyack for bringing this issue to my
  attention.

0.12.0

---------------------------
  
  Fixed (?) bug that caused crash when file changes type from regular
  file in middle of download (reported by Ty! Boyack).
  
  Failure to construct regular file in regression/restoration only
  causes warning, not fatal error.
  
  Removed --exclude-mirror option.  (Probably no one uses this, and it
  adds clutter.)
  
  --include and --exclude options should work now with restores, with
  some speed penalty.

0.11.5

---------------------------
  
  Added EDEADLOCK to the list of skippable errors.  (Thanks to Dave
  Kempe for report.)
  
  Added --list-at-time option at request of Farkas Levente.
  
  Various fixes for backing up onto windows directories.  Thanks to
  Keith Edmunds for bug reports and testing.
  
  Fixed possible crash when a file would be deleted while being
  processed (reported by Robert Weber).
  
  Handle better cases when there are two files with the same name in the
  same directory.
  
  Added --windows-restore switch, for use when when restoring from a
  windows-style file system to a normal one.  Use --windows-mode when
  backing up.
  
  Scott Bender's patch fixes backing up hard links when first linked
  file is quoted.

0.11.4

---------------------------
  
  Fixed bug incrementing sockets whose filenames were pretty long, but
  not super long.  Reported by Olivier Mueller.
  
  Added Albert Chin-A-Young's patch to add a few options to the setup.py
  install script.
  
  Apparently fixed rare utime type bug.  Thanks to Christian Skarby for
  report and testing.
  
  Added detailed file_statistics (in addition to session_statistics) as
  requested by Dean Gaudet.  Disable with --no-file-statistics option.
  
  Minor speed enhancements.

0.11.3

---------------------------
  
  Fixed a number of bugs reported by Olivier Mueller:
  
  Brought some old parts of the man page up-to-date.
  
  Fixed bug if unrecoverable error on second backup to a directory.
  
  Fixed spurious error message that could appear after a successful
  backup.
  
  --print-statistics option works again (before it would silently
  ignored).
  
  Fixed cache pipeline overflow bug.  This error could appear on
  large remote backups when many files have not changed.

0.11.2

---------------------------
  
  Fixed seg fault bug reported by a couple sparc/openbsd users.  Thanks
  to Dave Steinberg for giving me an account on his system for testing.
  
  Re-enabled --windows-mode and filename quoting.
  
  Fixed selection bug:  In 0.11.1, files which were included in one
  backup would be automatically included in the next.  Now you can
  include/exclude files session-by-session.
  
  Fixed ownership compare bug:  In 0.11.1, backups where the destination
  side was not root would preserve ownership information by recording it
  in the metadata file.  However, mere ownership changes would not
  trigger creation of new increments.  This has been fixed.
  
  Added the --no-inode-compare switch.  You probably don't need to use
  it though.
  
  If a special file cannot be created on the destination side, a 0
  length regular file will be written instead as a placeholder.
  (Restores should work fine because of the metadata file.)
  
  Yet another error handling strategy (hopefully this is the last one
  for a while, because this stuff isn't very exciting, and takes a long
  time to write):
  
  All recoverable errors are classified into one of three groups:
  ListErrors, UpdateErrors, and SpecialFileErrors.  rdiff-backup's
  reaction to each error is more formally defined (see the error
  policy page, currently at
  http://rdiff-backup.stanford.edu/error_policy.html).
  
  rdiff-backup makes no attempt to recover or clean up after
  unrecoverable errors.
  
  However, it now uses fsync() to increment the destination
  directory in a reversable way.  If there is an error, the next
  backup will regress the destination directory into its state
  before the aborted backup.
  
  The above process can be done without a backup with the
  --check-destination-dir option.
  
  Improved error logging.  Instead of the old haphazard reporting
  method, which sometimes didn't indicate the file an error occurred on,
  now all recoverable errors are reported in a standard format and also
  written to the error_log.<time>.data file in the rdiff-backup-data
  directory.  Thanks to Dean Gaudet and others for repeatedly bugging me
  about this.

0.11.1

---------------------------
  
  **Warning** Various features have been removed from this version, so
  this is not a safe upgrade.  Also this version has less error
  checking, and, if it crashes, this version may be more prone to leave
  the destination directory in an inconsistent state.  I plan to look at
  these issues in the next version.  Also, this version is quite
  different from previous ones, so you cannot run version 0.11.1 on one
  end of a connection and any previous version on the other side.
  
  The following features have been removed:
  
  --mirror-only option:  If you just want to mirror something, use
  rsync.  (Or you could use rdiff-backup and then just delete the
  rdiff-backup-data directory, and then update the root mtime.)
  
  --change-source-perms option:  This feature was pretty complicated
  to implement, and if something happened to rdiff-backup during a
  transfer, the old permissions could not be restored.
  
  All "resume" related functionality, like --checkpoint-interval:
  This was complicated to implement, and didn't seem to work all
  that well.
  
  Directory statistics file:  Although the session statistics file is
  still generated, the directory statistics file no longer is,
  because the new code structure makes it less inconvenient.
  
  The various --exclude and --include options no longer work when
  restoring.  This may be added later if there is demand.
  
  --windows-mode and filename quoting doesn't work.  There have been
  several requests for this in the past, so it will probably be
  re-added in the next version.
  
  Extensive refactoring.  A lot of rdiff-backup's code was structured as
  if it were still in one file, so it didn't make enough use of Python's
  module system.
  
  Now rdiff-backup writes metadata (uid, gid, mtime, etc.) to a
  compressed text file in the rdiff-backup-data directory.  Here are
  some ramifications:
  
  A user does not need root access on the destination side to record
  file ownership information.
  
  Some files may be recognized as not having changed based on this
  metadata, so it may not be necessary to traverse the whole mirror
  directory.  This can reduce file access on the destination side.
  
  Even when the --no-hard-links option is given when backing up,
  link relationships can be restored properly.  However, if this
  option is given, mirror files will not be linked together.
  
  Special file types like device and sockets which cannot be created
  on the remote side for some reason can still be backed up and
  restored properly.
  
  Fixed bug with the --{include|exclude}-globbing-filelist options
  (reported by Claus Herwig).
  
  Added --list-changed-since option to list the files changed since the
  given date, and added Bud Bruegger's patch to that.  The format and
  information this option provides will probably change in the near
  future.
  
  Restoring is now pipelined for better high latency performance, and
  unchanged files in the target directory will not be recopied.

0.11.0

---------------------------
  
  If get a socket error from trying to create a socket whose name is too
  long, just skip file instead of exiting with error (bug report by Ivo
  De Decker).
  
  Added --exclude-special-files switch, which excludes fifos, symlinks,
  sockets, and device files.
  
  --windows-mode is now short for --windows-time-format --chars-to-quote
  A-Z: --no-hard-links --exclude-special-files.  Thanks to Paul-Erik
  Törrönen for some helpful windows info.
  
  Multiple --include and --exclude statements can now be given in a
  single file.  See the documentation on
  --{include|exclude}-globbing-filelist.  Thanks to Henrik Lewander for
  pointing out that command line length could otherwise be a problem.
  
  Fixed bug in filelist processing that ignored leading or trailing
  whitespace in filelists.  Now filenames with, for instance, trailing
  spaces can be used in filelists.  Filelists which took advantage of
  this bug for formatting may have to be edited.
  
  Applied major/minor patch contributed by David S.  rdiff-backup should
  now correctly copy device files on platforms such as NetBSD.
  
  It is now possible to restore from a read-only filesystem (before
  rdiff-backup would fail when trying to open log file).  Thanks to
  Gregor Zattler for bug report.
  
  Fixed bug that prevented certain restores when the source directory
  was specified with a trailing backslash.
  
  Added a bit more logging so it should be apparent which file was being
  processed when an error occurs (thanks to Gerd Knops for suggestion).
  
  Fixed bug when using --chars-to-quote and directory deleted that has
  quoted characters in it.

0.10.1

---------------------------
  
  rdiff-backup should now correctly handle files larger than 2GB.
  Thanks to Russ Allbery for telling me how to do this.

0.10.0

---------------------------
  
  Fixed bug, probably introduced in 0.9.3, which prevented restores from
  a local source to a remote destination.  Reported by Phillip Eby.
  
  Fixed another bug reported by Phillip Eby, where restores would fail
  if rdiff-backup had only been run once and no increments were
  available.
  
  A few man page additions regarding restoring, statistics, and
  --test-server (thanks to Gregor Zattler, Christopher Schanzle, and
  Tobias Polzin for suggestions).
  
  Fixed comparison bug where rdiff-backup would unnecessarily report a
  directory as changed when its source size differed from its mirror
  size.  Thanks to Tim Allen for report.

0.9.5

--------------------------
  
  Fixed --verbosity option (now both -v and --verbosity work).  Thanks
  to Chris Dumont for report.
  
  ****** IMPORTANT ****** Fixed serious permissions bug found by Robert
  Weber.  Previous versions in the 0.9.x branch would throw away high
  bit permissions (like the setuid and setuid bits).  This would be
  especially bad when running with the --change-source-perms operation.
  Anyone running 0.9.0 - 0.9.4 should upgrade immediately.
  
  Complain about --change-source-perms when running as root, as this
  option should not be necessary then.
  
  Fixed bug with --windows-mode.  Thanks to Chris Grindstaff for report.

0.9.4

--------------------------
  
  Man page now correctly included in rpm.
  
  To prevent confusion, rdiff-backup script does not have exec
  permissions until it is installed (thanks Jason Piterak).
  
  Sockets are now replicated.  Why not?  (Suggestion by Mickey Everts)
  
  Bad resuming information (because, say, it is left over from a
  previous version) should no longer cause exit, except when --resume is
  specified.
  
  Better error handling in certain cases when errors occur in file reads
  (thanks to John Goerzen for report).

0.9.3

--------------------------
  
  Added --sleep-ratio option after hearing that rdiff-backup was too
  hard on hard disks (thanks to Steve Alexander for the suggestion).
  Quick example:  --sleep-ratio 0.25 makes rdiff-backup sleep about 25%
  of the time.  Maybe this will help on bandwidth usage also.
  
  Fixed -m/--mirror-only option.
  
  Added --exclude-other-filesystems option.  Thanks to Paul Wouters for
  the suggestion.
  
  Added convenience field TotalDestinationSizeChange (total change in
  destination directory - mirror change + increments change) to
  session_statistics file.
  
  Handle a particular situation better where a file changes in a certain
  way while rdiff-backup is processing it.  Before rdiff-backup would
  just crash; now it skips the file.  Thanks to Scott Bender for the bug
  report.
  
  A couple interface fixes to --remove-older-than.
  
  Added some security features to the protocol, so rdiff-backup will now
  only allow commands from remote connections.  The extra security will
  be enabled automatically on the client (it knows what to expect), but
  the extra switches --restrict, --restrict-update-only, and
  --restrict-read-only have been added for use with --server.

0.9.2

--------------------------
  
  Interface directly with librsync(.a|.so) instead of running "rdiff"
  command line utility.  This can significant save fork()ing time when
  processing lots of smallish files that have changed.  Also, rdiff is
  no longer required to be in the PATH.
  
  Further speed optimizations, mostly reducing CPU consumption when
  scanning through unchanged files.
  
  Fixed Path bug which could caused globbing and regexp include/exclude
  statements to malfunction when the base of the source directory was
  "/" (root of filesystem).  Thanks to Vlastimil Adamovsky for noting
  this bug.
  
  Added quoting for spaces in directory_statistics file, hopefully
  making it easier to parse.

0.9.1

--------------------------
  
  Fixed some bad C.  Besides being unportable and leaking memory, it may
  have lead to someone's backup directory getting deleted (?).
  
  Tweaked some error recovery code to make it more like 0.8.0.
  
  Improved the installation a bit.

0.9.0

--------------------------
  
  Changed lots of the code to distribute as standard python package
  instead of single script.  Installation procedure is also different.
  
  Speed optimizations - average user might see speed increase of 2 or
  more.

0.8.0

--------------------------
  
  Added --null-separator argument so filenames can safely include
  newlines in an include/exclude filelist.
  
  Fixed bug that affected restoring from current mirror with the '-r
  now' option.

0.7.6

--------------------------
  
  Improved statistics support, and added --print-statistics and
  --calculate-average switches.  See the directory_statistics and
  session_statistics files in the rdiff-backup-data directory.
  
  Major improvements to error correction and resuming.
  
  Now signals SIGQUIT, SIGHUP, and SIGTERM are caught to exit more
  gracefully.
  
  Fixed crankyness when --exclude-filelist is the last exclude option
  and it is given an empty file (thanks to Bryce C for report).

0.7.5

--------------------------
  
  Fixed resuming bug.
  
  After a bit of empirical testing, increased Globals.conn_bufsize and
  enabled ssh compression by default (and also added
  --ssh-no-compression option).  This should speed up the "typical"
  remote session.
  
  Fixed bug noticed by Dean Gaudet in processing of
  --(include|exclude)-filelist[-stdin] options when source directory was
  remote.
  
  Fixed --include error reporting bug reported by Ben Edwards.
  
  Small change so 'door' files and other unknown file types will be
  ignored.  (Thanks for Steve Simitzis for sending in a patch for this.)
  
  Fixed bug noticed by Dean Gaudet where, unless the
  --change-source-perms option is specified, rdiff-backup wouldn't even
  attempt to open files lacking ownership permissions.

0.7.4

--------------------------
  
  Added new restore syntax and corresponding -r and --restore-as-of
  options.  For instance, "rdiff-backup -r 1/3/2002 /backup/foo out"
  will try to restore /backup/foo (a file on the mirror directory) to
  out, as it was January 3rd, 2002.  See man page for more information.
  
  directory_statistics.<time>.data files will now be created in the
  directories underneath rdiff-backup-data/increments.  Just look at one
  to see what's inside.
  
  Added extra options --chars-to-quote, --quoting-char, and
  --windows-mode, mostly to allow files whose names have colons (:) in
  them to be backed up to windows machines.
  
  Now the -l and --list-increments switches can list the increments
  corresponding to any mirror file, not just the root directory.  Also
  the option --parsable-output was added to control whether the
  --list-increments output looks better for a human, or computer.
  
  Improved remove-earlier-than handling so it should run approximately
  as fast locally and remotely.
  
  Probably fixed bug noticed by Erminio Baranzini which caused
  rdiff-backup to try to preserve access times unnecessarily (the
  default is not preserve access times).
  
  Rewrote a few large chunks of code for clarity and simplicity.
  
  Allow extended time strings for the --remove-older-than option.
  
  Added RESTORING section to the manual page because there seemed to be
  some general confusion about this.
  
  hardlink_data, current_mirror, and a few other files now carry the
  .data extension (instead of .snapshot), to make it clearer they are
  not copies of source files.

0.7.3

--------------------------
  
  Fixed broken remote operation in v0.7.2 by applying (a variant of)
  Daniel Robbins' patch.  Also fixed associated bug in test set.
  
  Fixed bug recognizing --[include|exclude]-filelist-stdin options, and
  IndexError bug reading some filelists.
  
  --force is no longer necessary if the target directory is empty.
  
  --include/--exclude/etc now work for restoring as they do for backing up.
  
  Raised verbosity level for traceback output - if long log error
  messages are annoying you, set verbosity to 2.  Will come up with a
  better logging system later.
  
  May have fixed a problem encountered by Matthew Farrellee and Kevin
  Spicer wherein the _session_info_list information was stored on the
  wrong computer.  This could cause rdiff-backup to fail when running
  after another backup that failed for a different reason.  May backport
  this fix to 0.6.0 later.
  
  May have fixed a problem also noticed by Matthew Farrellee which can
  cause rdiff-backup to exit when a directory changes into a
  non-directory file while rdiff-backup is processing the directory.
  (May also apply to 0.6.0).
  
  Fixed a bug noticed by Jamie Heilman where restoring could fail if a
  recent rdiff-backup process which produced the backup set was aborted
  while processing a new directory.  (May also apply to 0.6.0)

0.7.2

--------------------------
  
  Added new selection options --exclude-filelist,
  --exclude-filelist-stdin, --exclude-regexp, --include-filelist,
  --include-filelist-stdin, --include-regexp.
  
  *** WARNING *** the --include and --exclude options have changed.  The
  new --include-regexp and --exclude-regexp are close to, but still
  different from the old --include and --exclude options.  See the man
  page for details.
  
  Friendlier error reporting when remote connection doesn't start.

0.7.1

--------------------------
  
  Now by default .snapshot and .diff increments are compressed with
  python's internal gzip.  The new increments format is backwards
  compatible, but only rdiff-backup >0.7.1 will be able to restore if
  any gzipped increments are present.
  
  Added --no-compression and --no-compression-regexp to control which
  files are compressed.

0.7.0

--------------------------
  
  Added hardlink support.  This is now the default, but can be turned
  off with --no-hardlinks.
  
  Clarified a bit of the manual.
  
  May have fixed a bug with remote handling of device files.

0.6.0

--------------------------
  
  Fixed some assorted manual "bugs".
  
  Fixed endless loop bug in certain error recovery situation reported by
  Nick Duffek, and slightly changed around some other error correction
  code.
  
  Switching to new version numbering system:  versions x.2n+1.x are
  unstable, versions x.2n.x are supposed to be more stable.

0.5.4

--------------------------
  
  Fixed bug present since 0.5.0 wherein rdiff-backup would make
  snapshots instead of diffs when regular files change.
  
  May have fixed race condition involving rdiff execution.

0.5.3

--------------------------
  
  It turns out the previous version broke device handling.  Sorry about
  that..

0.5.2

--------------------------
  
  Fixed bugs which made rdiff-backup try to preserve mod times when it
  wasn't necessary, and exit instead of warning when it wasn't being run
  as root and found a file it didn't own.  (Reported by Alberto
  Accomazzi.)
  
  Added some more error checking; maybe this will fix a bug reported by
  John Goerzen wherein rdiff-backup can crash if file is deleted while
  rdiff-backup is processing it.
  
  Changed locations of some of the temp files; filenames will be
  determined by the tempfile module.

0.5.1

--------------------------
  
  When establishing a connection, print a warning if the server version
  is different from the client version.
  
  When find rdiff error value 256, tell user that it is probably because
  rdiff couldn't be found in the path.
  
  Fixed a serious bug that can apparently cause a remote backups to fail
  (reported by John Goerzen).
  
  May have fixed a bug that causes recovery from certain errors to fail.

0.5.0

--------------------------
  
  Now every so often (default is 20 seconds, the --checkpoint-interval
  option controls it) rdiff-backup checkpoints by dumping its state to
  temporary files in the rdiff-backup-data directory.  If rdiff-backup
  is rerun with the same destination directory, it can either try to
  resume the previous backup or at least clean things up so the archive
  is consistent and accurate.
  
  Added new options --resume, --no-resume, and --resume-interval, which
  control when rdiff-backup tries to resume a previous failed backup.
  
  Fixed a bug with the --exclude-device-files option which caused the
  option to be ignored when the source directory was remote.
  
  By default, if rdiff-backup encounters a certain kind of IOError
  (currently types 26 and 5) while trying to access a file, it logs the
  error, skips the file, and tries to continue.
  
  If settings requiring an integer argument (like -v or
  --checkpoint-interval) are given a bad (non-integer) argument, fail
  with better explanation.
  
  Fixed annoying logging bug.  Now no matter which computer a logging
  message originates on, it should be routed to the process which is
  writing to the logging file, and written correctly.  However, logging
  messages about network traffic will not be routed, as this will
  generate more traffic and lead to an infinite regress.
  
  When calling rdiff, uses popen2.Popen3 and os.spawnvp instead of
  os.popen and os.system.  This should make rdiff-backup more secure.
  Thanks to Jamie Heilman for the suggestion.
  
  Instead of calling the external shell command 'stat', rdiff-backup
  uses os.lstat().st_rdev to determine a device file's major and minor
  numbers.  The new method should be more portable.  Thanks to Jamie
  Heilman for the suggestion.
  
  All the file operations were examined and tweaked to try to
  minimize/eliminate the chance of leaving the backup directory in an
  inconsistent state.
  
  Upon catchable kinds of errors, try to checkpoint before exiting so
  later rdiff-backup processes have more information to work with.
  
  At the suggestion of Jason Piterak, added a --windows-time-format
  option so rdiff-backup will (perhaps) work under MS windows NT.

0.4.4

--------------------------
  
  Applied Berkan Eskikaya's "xmas patch" (I was travelling and didn't
  have a chance on Christmas).  He fixed important bugs in the
  --terminal-verbosity and --remove-older-than options.
  
  Added an --exclude-device-files option, which makes rdiff-backup skip
  any device files in the same way it skips files selected with the
  --exclude option.

0.4.3

--------------------------
  
  Plugged another memory hole.  At first I thought it might have been
  python's fault, but it was all me.  If rdiff-backup uses more than a
  few megabytes of memory, tell me because it is probably another memory
  hole..
  
  rdiff-backup is now a bit more careful about deleting temporary files
  it creates when it is done with them.
  
  Changed the rpm spec a little.  The enclosed man page is gzipped and
  the package file is GPG signed (it can be checked with, for example,
  "rpm --checksig -v rdiff-backup-0.4.3-1.noarch.rpm").
  
  rdiff-backup no longer checks the mtimes or atimes of device files.
  Use of these times was inconsistent (sometimes writing to device files
  updates their times, sometimes not) and leads to unnecessary backing
  up of files.

0.4.2

--------------------------
  
  Significant speed increases (maybe 20% for local sessions) when
  dealing with directories that do not need to be updated much.
  
  Fixed memory leak.  rdiff-backup should now run in almost constant
  memory (about 6MB on my system).
  
  Enabled buffering of object transfers, so remote sessions can be
  50-100%+ faster.
  
  rdiff-backup now thinks it is running as root if the destination
  connection is root.  Thus rdiff-backup will preserve ownership even if
  it is not running as root on the source end.
  
  If you abort rdiff-backup or it fails for some reason, it is now more
  robust about recovering the next time it is run (before it could fail
  in ways which made subsequent sessions fail also).  However, it is
  still not a good idea to abort, as individual files could be in the
  process of being written and could get corrupted.
  
  If rdiff-backup encounters an unreadable file (or, if
  --change-source-perms is given, a file whose permissions it cannot
  change), it will log a warning, ignore the file, and continue, instead
  of exiting with an error.

0.4.1

-------------------------
  
  Now either the source, or the target, or both can be remote.  To make
  this less confusing, now rdiff-backup supports host::file notation.
  So it is legal to run:
  
  rdiff-backup billhost1.net::source_file joneshost2.net::target
  
  Also, the test suites have been improved and found a number of bugs
  (which were then fixed).

0.4.0

-------------------------
  
  Much of the rdiff-backup internals were rewritten.  The result should
  be better performance when operating remotely over a pipe with
  significant latency.  Also the code dealing with changing permissions
  is much cleaner, and should generalize later to similar jobs (for
  instance preserving atimes.)
  
  Listing and deleting increments and restoring should work remotely
  now.  In earlier versions a file or directory had to be restored
  locally and then copied over to its final destination.
  
  At the request of the FSF, a copy of the GPL has been included in the
  packaged distributions.  It is in the file "COPYING".

0.3.4

--------------------------
  
  A change in python from the 2.2a series to 2.2b series made remote
  backup on version 0.3.3 stop work, a small change fixes it.  (Thanks
  to Berkan Eskikaya for telling me about this.)
  
  Listed some missing features/bugs on the manual page.

0.3.3

--------------------------
  
  Changed quoting system yet again after learning that the old system
  was not very portable between shells (thanks Hans
  <hguevremonteternitee.com>)

0.3.2

-------------------------
  
  Added --list-increments and --remove-older-than commands.
  --list-increments will just tell you what increments you have and
  their dates.  This isn't anything you couldn't get from "ls", but it
  may be formatted more nicely.  The --remove-older-than command is used
  to delete older increments that you don't want, or don't have space
  for.
  
  Also, on some systems ssh was adding a spurious "Broken pipe" message,
  even though everything went fine.  Maybe this version will prevent
  this confusing message.

0.3.1

-------------------------
  
  Fix for stupid bug - when running remotely as users with different
  uids, rdiff-backup now doesn't check the uid/gid.  Before it kept
  thinking that the files needed to be updated because they didn't have
  the right ownership.  This shouldn't have resulted in any data loss -
  just some unnecessary .rdiff files.  (Thanks to Michael Friedlander
  for finding this.)
  
  Added check to make sure that rdiff exits successfully.

0.3.0

---------------------------------------------
  
  rdiff-backup has been almost completely rewritten for v0.3.0, as it
  was for v0.1.0.  The main problem with versions 0.2.x was that the
  networking code was added to the not-remote-capable v0.1, and the
  result was unwieldy and prone to bugs when operating over a pipe.
  
  There are some new features:
  
  - Hopefully very few bugs, at least in basic file handling.
  rdiff-backup has an extensive testing suite now, so it should be
  much more reliable.
  
  - Complete support for reading and writing from and to files and
  directories that lack permissions, by temporarily changing them, and
  then changing them back later.  (See for instance the
  --change-source-perms switch.)  As I found out there is a lot to
  this, so much that I'm not sure in retrospect I should have
  bothered. :-)
  
  - New more standard format for increment files.  See
  https://www.w3.org/TR/NOTE-datetime for the time standard.  The old
  format, besides being less standard, didn't take timezones into
  account.
  
  - In the initial mirroring, rdiff-backup only copies the files that it
  needs to, so it is much quicker when you almost have an initial
  mirror already.  You can even the --mirror-only switch and make
  rdiff-backup into a slow version of rsync.
  
  - Terminal and file verbosity levels can be selected separately.  So
  if you like a lot in your backup.log/restore.log but not much on
  your terminal, or vice-versa, you can set them at different numbers.
  
  - New --test-server option so if something goes wrong you can see if
  it is because the server on the other side isn't being initialized
  properly.
  
  - New --no-rdiff-copy option, which disables using rdiff to move files
  across a connection (it will still be used to make increment files
  however).  If the bottleneck is not bandwidth but local disks/CPUs,
  this options should speed things up.
  
  There are, however, a few negatives:
  
  - rdiff-backup now requires Python version 2.2 or later.  Sorry for
  the inconvenience but I use the new features a lot.
  
  - It may be slightly slower overall than versions 0.2.x - the remote
  code is cleaner, but probably has higher overhead.  At least on my
  computer, rdiff-backup is still quicker than rsync for local
  mirroring of large files, but for remote mirroring, rsync will
  usually be much quicker, because it uses a fairly low-overhead
  pipelining protocol.
  
  - Any old increments are incompatible because they use a different
  date/time standard.  If this is a big deal, try mailing me.  A
  converter shouldn't be very difficult to write, but I didn't want to
  take the time unless someone really wanted it.

0.2.8

-------------------------
  
  Fixed two stupid bugs that would cause rdiff-backup to exit with an
  exception.  (I can't believe they were in there.)

0.2.7

-------------------------
  
  Added new long options --backup-mode and --verbosity which are
  equivalent to -b and -v.
  
  rdiff-backup should be a little more resistant to the filesystem it is
  backup up changing underneath it (although it is not setup to handle
  this in general).  Thanks Alberto Accomazzi
  <aaccomazzicfa.harvard.edu> for these suggestions.

0.2.6

-------------------------
  
  Fixed bug where, for non-root users, rdiff-backup could, in the
  process of mirroring an unwritable directory, make the copy
  unwriteable and then fail.  Now rdiff-backup goes through and makes
  what it needs to be readable and writeable, and then changes things
  back at the end.  (Another one found by Jeb Campbell!)

0.2.5

-------------------------
  
  Added better error reporting when server throws an exception.
  
  Fixed bug so that backed-up setuid files will also be setuid.
  
  Now rdiff-backup thinks it's running as root only if both client and
  server are running as root (Thanks to Jeb Campbell for finding these
  previous two bugs).
  
  Fixed miscellaneous Path bug that could occur in remote operation.

0.2.4

-------------------------
  
  Added more logging options that may help other track down a mysterious
  bug.

0.2.3

-------------------------
  
  Fixed typing bug that caused an Assertion Error in remote operation,
  thanks again to Jeb Campbell for finding it.

0.2.2

-------------------------
  
  Fixed bug in remote creation of special files and symlinks (thanks to
  Jeb Campbell <jebcc4solutions.net> for finding it).
  
  Fixed another error report.

0.2.1

------------------------
  
  Now if rdiff-backup isn't running as root, it doesn't try to change
  file ownership.
  
  Fixed an error report.
  
  Stopped flushing an open pipe to fix a race condition on IRIX.

0.2

----------------------
  
  rdiff-backup can now operate in a bandwidth efficient manner (a la
  rsync) using a pipe setup with, for instance, ssh.
  
  I was too hasty with the last bug fix and didn't deal with all
  filenames properly.  Maybe this one will work.

0.1.1 not secure

-------------------------
  
  Bug fix:  Filenames that may contain spaces, backslashes, and other
  special characters are quoted now and should be handled correctly.

0.1

----------------------
  
  Large portion (majority?) of rdiff-backup was rewritten for v0.1.  New
  version highlights:
  
  -  No new features!
  -  No speed improvements!  It may even be slower...
  -  No bug fixes!  (ok maybe a few)
  
  However, the new version is much cleaner and better documented.  This
  version should have fewer bugs, and it should be easier to fix any
  future bugs.