New unison beta-release (2.17) available; 2.13 promoted to stable

Benjamin Pierce <[email protected]> Thu, 11 Aug 2005 23:17:46 -0400

Newsgroups	gmane.network.unison.general,gmane.network.unison.announce
Message-ID	<[email protected]>

The Unison team is pleased to announce a new beta-release, version
2.17. The changes in this version are substantial, but mostly
internal: we've completely revamped the way backups are handled,
making the code simpler and more robust (probably modulo a few growing
pains :-), and we've added a few new options to make backups easier to
configure. Also, we've revamped the support for external merge
programs, so that Unison will be able to use instances of Harmony as
external merge tools.

Version 2.13.16, which has been working well for weeks, is now
promoted to stable.

Grab it from here:
http://www.cis.upenn.edu/~bcpierce/unison/download.html

Regards,

Benjamin

------------------------------------------------------------------------
---

Changes in Version 2.17.1

Changes since 2.13.0:
* The features for performing backups and for invoking external
merge programs have been completely rewritten by Stephane
Lescuyer
(thanks, Stephane!). The user-visible functionality should not
change, but the internals have been rationalized and there are a
number of new features. See the manual (in particular, the
description of the backupXXX preferences) for details.
* Incorporated patches for ipv6 support, contributed by Samuel
Thibault. (Note that, due to a bug in the released OCaml 3.08.3
compiler, this code will not actually work with ipv6 unless
compiled with the CVS version of the OCaml compiler, where
the bug
has been fixed; however, ipv4 should continue to work normally.)
* OSX interface:
+ Incorporated Ben Willmore's cool new icon for the Mac UI.
* Small fixes:
+ Fixed off by one error in month numbers (in printed dates)
reported by Bob Burger

Changes since 2.12.0:
* New convention for release numbering: Releases will continue
to be
given numbers of the form X.Y.Z, but, from now on, just the
major
version number (X.Y) will be considered significant when
checking
compatibility between client and server versions. The third
component of the version number will be used only to identify
"patch levels" of releases.
This change goes hand in hand with a change to the procedure for
making new releases. Candidate releases will initially be given
"beta release" status when they are announced for public
consumption. Any bugs that are discovered will be fixed in a
separate branch of the source repository (without changing the
major version number) and new tarballs re-released as needed.
When
this process converges, the patched beta version will be dubbed
stable.
* Warning (failure in batch mode) when one path is completely
emptied. This prevents Unison from deleting everything on one
replica when the other disappear.
* Fix diff bug (where no difference is shown the first time the
diff
command is given).
* User interface changes:
+ Improved workaround for button focus problem (GTK2 UI)
+ Put leading zeroes in date fields
+ More robust handling of character encodings in GTK2 UI
+ Changed format of modification time displays, from modified
at hh:mm:ss on dd MMM, yyyy to modified on yyyy-mm-dd
hh:mm:ss
+ Changed time display to include seconds (so that people on
FAT filesystems will not be confused when Unison tries to
update a file time to an odd number of seconds and the
filesystem truncates it to an even number!)
+ Use the diff "-u" option by default when showing
differences
between files (the output is more readable)
+ In text mode, pipe the diff output to a pager if the
environment variable PAGER is set
+ Bug fixes and cleanups in ssh password prompting. Now works
with the GTK2 UI under Linux. (Hopefully the Mac OS X
one is
not broken!)
+ Include profile name in the GTK2 window name
+ Added bindings ',' (same as '<') and '.' (same as '>')
in the
GTK2 UI
* Mac GUI:
+ actions like < and > scroll to the next item as necessary.
+ Restart has a menu item and keyboard shortcut (command-R).
+ Added a command-line tool for Mac OS X. It can be installed
from the Unison menu.
+ New icon.
+ Handle the "help" command-line argument properly.
+ Handle profiles given on the command line properly.
+ When a profile has been selected, the profile dialog is
replaced by a "connecting" message while the connection is
being made. This gives better feedback.
+ Size of left and right columns is now large enough so that
"PropsChanged" is not cut off.
* Minor changes:
+ Disable multi-threading when both roots are local
+ Improved error handling code. In particular, make sure all
files are closed in case of a transient failure
+ Under Windows, use $UNISON for home directory as a last
resort (it was wrongly moved before $HOME and
$USERPROFILE in
Unison 2.12.0)
+ Reopen the logfile if its name changes (profile change)
+ Double-check that permissions and modification times have
been properly set: there are some combination of OS and
filesystem on which setting them can fail in a silent way.
+ Check for bad Windows filenames for pure Windows
synchronization also (not just cross architecture
synchronization). This way, filenames containing
backslashes,
which are not correctly handled by unison, are rejected
right
away.
+ Attempt to resolve issues with synchronizing modification
times of read-only files under Windows
+ Ignore chmod failures when deleting files
+ Ignore trailing dots in filenames in case insensitive mode
+ Proper quoting of paths, files and extensions ignored using
the UI
+ The strings CURRENT1 and CURRENT2 are now correctly
substitued when they occur in the diff preference
+ Improvements to syncing resource forks between Macs via a
non-Mac system.

Changes since 2.10.2:
* INCOMPATIBLE CHANGE: Archive format has changed.
* Source code availability: The Unison sources are now managed
using
Subversion. One nice side-effect is that anonymous checkout
is now
possible, like this:
svn co https://cvs.cis.upenn.edu:3690/svnroot/unison/
We will also continue to export a "developer tarball" of the
current (modulo one day) sources in the web export directory. To
receive commit logs for changes to the sources, subscribe to the
unison-hackers list
(http://www.cis.upenn.edu/ bcpierce/unison/lists.html).
* Text user interface:
+ Substantial reworking of the internal logic of the text
UI to
make it a bit easier to modify.
+ The dumbtty flag in the text UI is automatically set to
true
if the client is running on a Unix system and the EMACS
environment variable is set to anything other than the
empty
string.
* Native OS X gui:
+ Added a synchronize menu item with keyboard shortcut
+ Added a merge menu item, still needs to be debugged
+ Fixes to compile for Panther
+ Miscellaneous improvements and bugfixes
* Small changes:
+ Changed the filename checking code to apply to Windows
only,
instead of OS X as well.
+ Finder flags now synchronized
+ Fallback in copy.ml for filesystem that do not support
O_EXCL
+ Changed buffer size for local file copy (was highly
inefficient with synchronous writes)
+ Ignore chmod failure when deleting a directory
+ Fixed assertion failure when resolving a conflict content
change / permission changes in favor of the content change.
+ Workaround for transferring large files using rsync.
+ Use buffered I/O for files (this is the only way to open
files in binary mode under Cygwin).
+ On non-Cygwin Windows systems, the UNISON environment
variable is now checked first to determine where to look
for
Unison's archive and preference files, followed by HOME and
USERPROFILE in that order. On Unix and Cygwin systems, HOME
is used.
+ Generalized diff preference so that it can be given
either as
just the command name to be used for calculating diffs or
else a whole command line, containing the strings CURRENT1
and CURRENT2, which will be replaced by the names of the
files to be diff'ed before the command is called.
+ Recognize password prompts in some newer versions of ssh.

Changes since 2.9.20:
* INCOMPATIBLE CHANGE: Archive format has changed.
* Major functionality changes:
+ Major tidying and enhancement of 'merge' functionality. The
main user-visible change is that the external merge program
may either write the merged output to a single new file, as
before, or it may modify one or both of its input files, or
it may write two new files. In the latter cases, its
modifications will be copied back into place on both the
local and the remote host, and (if the two files are now
equal) the archive will be updated appropriately. More
information can be found in the user manual. Thanks to Malo
Denielou and Alan Schmitt for these improvements.
Warning: the new merging functionality is not completely
compatible with old versions! Check the manual for details.
+ Files larger than 2Gb are now supported.
+ Added preliminary (and still somewhat experimental) support
for the Apple OS X operating system.
o Resource forks should be transferred correctly.
(See the
manual for details of how this works when
synchronizing
HFS with non-HFS volumes.) Synchronization of file
type
and creator information is also supported.
o On OSX systems, the name of the directory for storing
Unison's archives, preference files, etc., is now
determined as follows:
# if ~/.unison exists, use it
# otherwise, use ~/Library/Application
Support/Unison, creating it if necessary.
o A preliminary native-Cocoa user interface is under
construction. This still needs some work, and some
users
experience unpredictable crashes, so it is only for
hackers for now. Run make with UISTYLE=mac to build
this
interface.
* Minor functionality changes:
+ Added an ignorelocks preference, which forces Unison to
override left-over archive locks. (Setting this
preference is
dangerous! Use it only if you are positive you know what
you
are doing.)
+ Running with the -timers flag set to true will now show the
total time taken to check for updates on each directory.
(This can be helpful for tidying directories to improve
update detection times.)
+ Added a new preference assumeContentsAreImmutable. If a
directory matches one of the patterns set in this
preference,
then update detection is skipped for files in this
directory.
(The purpose is to speed update detection for cases like
Mail
folders, which contain lots and lots of immutable files.)
Also a preference assumeContentsAreImmutableNot, which
overrides the first, similarly to ignorenot. (Later
amendment: these preferences are now called immutable and
immutablenot.)
+ The ignorecase flag has been changed from a boolean to a
three-valued preference. The default setting, called
default,
checks the operating systems running on the client and
server
and ignores filename case if either of them is OSX or
Windows. Setting ignorecase to true or false overrides this
behavior. If you have been setting ignorecase on the
command
line using -ignorecase=true or -ignorecase=false, you will
need to change to -ignorecase true or -ignorecase false.
+ a new preference, 'repeat', for the text user interface
(only). If 'repeat' is set to a number, then, after it
finishes synchronizing, Unison will wait for that many
seconds and then start over, continuing this way until
it is
killed from outside. Setting repeat to true will
automatically set the batch preference to true.
+ Excel files are now handled specially, so that the
fastcheck
optimization is skipped even if the fastcheck flag is set.
(Excel does some naughty things with modtimes, making this
optimization unreliable and leading to failures during
change
propagation.)
+ The ignorecase flag has been changed from a boolean to a
three-valued preference. The default setting, called
'default', checks the operating systems running on the
client
and server and ignores filename case if either of them
is OSX
or Windows. Setting ignorecase to 'true' or 'false'
overrides
this behavior.
+ Added a new preference, 'repeat', for the text user
interface
(only, at the moment). If 'repeat' is set to a number,
then,
after it finishes synchronizing, Unison will wait for that
many seconds and then start over, continuing this way until
it is killed from outside. Setting repeat to true will
automatically set the batch preference to true.
+ The 'rshargs' preference has been split into 'rshargs' and
'sshargs' (mainly to make the documentation clearer). In
fact, 'rshargs' is no longer mentioned in the documentation
at all, since pretty much everybody uses ssh now anyway.
* Documentation
+ The web pages have been completely redesigned and
reorganized. (Thanks to Alan Schmitt for help with this.)
* User interface improvements
+ Added a GTK2 user interface, capable (among other
things) of
displaying filenames in any locale encoding. Kudos to
Stephen
Tse for contributing this code!
+ The text UI now prints a list of failed and skipped
transfers
at the end of synchronization.
+ Restarting update detection from the graphical UI will
reload
the current profile (which in particular will reset the -
path
preference, in case it has been narrowed by using the
"Recheck unsynchronized items" command).
+ Several small improvements to the text user interface,
including a progress display.
* Bug fixes (too numerous to count, actually, but here are some):
+ The maxthreads preference works now.
+ Fixed bug where warning message about uname returning an
unrecognized result was preventing connection to server.
(The
warning is no longer printed, and all systems where 'uname'
returns anything other than 'Darwin' are assumed not to be
running OS X.)
+ Fixed a problem on OS X that caused some valid file names
(e.g., those including colons) to be considered invalid.
+ Patched Path.followLink to follow links under cygwin in
addition to Unix (suggested by Matt Swift).
+ Small change to the storeRootsName function, suggested by
bliviero at ichips.intel.com, to fix a problem in unison
with
the `rootalias' option, which allows you to tell unison
that
two roots contain the same files. Rootalias was being
applied
after the hosts were sorted, so it wouldn't work
properly in
all cases.
+ Incorporated a fix by Dmitry Bely for setting utimes of
read-only files on Win32 systems.
* Installation / portability:
+ Unison now compiles with OCaml version 3.07 and later
out of
the box.
+ Makefile.OCaml fixed to compile out of the box under
OpenBSD.
+ a few additional ports (e.g. OpenBSD, Zaurus/IPAQ) are now
mentioned in the documentation
+ Unison can now be installed easily on OSX systems using the
Fink package manager

Changes since 2.9.1:
* Added a preference maxthreads that can be used to limit the
number
of simultaneous file transfers.
* Added a backupdir preference, which controls where backup files
are stored.
* Basic support added for OSX. In particular, Unison now
recognizes
when one of the hosts being synchronized is running OSX and
switches to a case-insensitive treatment of filenames (i.e.,
'foo'
and 'FOO' are considered to be the same file). (OSX is not yet
fully working, however: in particular, files with resource forks
will not be synchronized correctly.)
* The same hash used to form the archive name is now also added to
the names of the temp files created during file transfer. The
reason for this is that, during update detection, we are
going to
silently delete any old temp files that we find along the
way, and
we want to prevent ourselves from deleting temp files
belonging to
other instances of Unison that may be running in parallel, e.g.
synchronizing with a different host. Thanks to Ruslan Ermilov
for
this suggestion.
* Several small user interface improvements
* Documentation
+ FAQ and bug reporting instructions have been split out as
separate HTML pages, accessible directly from the unison
web
page.
+ Additions to FAQ, in particular suggestions about
performance
tuning.
* Makefile
+ Makefile.OCaml now sets UISTYLE=text or UISTYLE=gtk
automatically, depending on whether it finds lablgtk
installed
+ Unison should now compile "out of the box" under OSX

Changes since 2.8.1:
* Changing profile works again under Windows
* File movement optimization: Unison now tries to use local copy
instead of transfer for moved or copied files. It is
controled by
a boolean option "xferbycopying".
* Network statistics window (transfer rate, amount of data
transferred). [NB: not available in Windows-Cygwin version.]
* symlinks work under the cygwin version (which is dynamically
linked).
* Fixed potential deadlock when synchronizing between Windows and
Unix
* Small improvements:
+ If neither the
tt USERPROFILE nor the
tt HOME environment variables are set, then Unison will put
its temporary commit log (called
tt DANGER.README) into the directory named by the
tt UNISON environment variable, if any; otherwise it
will use
tt C:.
+ alternative set of values for fastcheck: yes = true; no =
false; default = auto.
+ -silent implies -contactquietly
* Source code:
+ Code reorganization and tidying. (Started breaking up
some of
the basic utility modules so that the non-unison-specific
stuff can be made available for other projects.)
+ several Makefile and docs changes (for release);
+ further comments in "update.ml";
+ connection information is not stored in global variables
anymore.

Changes since 2.7.78:
* Small bugfix to textual user interface under Unix (to avoid
leaving the terminal in a bad state where it would not echo
inputs
after Unison exited).

Changes since 2.7.39:
* Improvements to the main web page (stable and beta version docs
are now both accessible).
* User manual revised.
* Added some new preferences:
+ "sshcmd" and "rshcmd" for specifying paths to ssh and rsh
programs.
+ "contactquietly" for suppressing the "contacting server"
message during Unison startup (under the graphical UI).
* Bug fixes:
+ Fixed small bug in UI that neglected to change the
displayed
column headers if loading a new profile caused the roots to
change.
+ Fixed a bug that would put the text UI into an infinite
loop
if it encountered a conflict when run in batch mode.
+ Added some code to try to fix the display of non-Ascii
characters in filenames on Windows systems in the GTK UI.
(This code is currently untested--if you're one of the
people
that had reported problems with display of non-ascii
filenames, we'd appreciate knowing if this actually fixes
things.)
+ `-prefer/-force newer' works properly now. (The bug was
reported by Sebastian Urbaniak and Sean Fulton.)
* User interface and Unison behavior:
+ Renamed `Proceed' to `Go' in the graphical UI.
+ Added exit status for the textual user interface.
+ Paths that are not synchronized because of conflicts or
errors during update detection are now noted in the log
file.
+ [END] messages in log now use a briefer format
+ Changed the text UI startup sequence so that
tt ./unison -ui text will use the default profile
instead of
failing.
+ Made some improvements to the error messages.
+ Added some debugging messages to remote.ml.

Changes since 2.7.7:
* Incorporated, once again, a multi-threaded transport sub-system.
It transfers several files at the same time, thereby making much
more effective use of available network bandwidth. Unlike the
earlier attempt, this time we do not rely on the native thread
library of OCaml. Instead, we implement a light-weight,
non-preemptive multi-thread library in OCaml directly. This
version appears stable.
Some adjustments to unison are made to accommodate the
multi-threaded version. These include, in particular, changes to
the user interface and logging, for example:
+ Two log entries for each transferring task, one for the
beginning, one for the end.
+ Suppressed warning messages against removing temp files
left
by a previous unison run, because warning does not work
nicely under multi-threading. The temp file names are made
less likely to coincide with the name of a file created by
the user. They take the form
.#<filename>.<serial>.unison.tmp.
* Added a new command to the GTK user interface: pressing 'f'
causes
Unison to start a new update detection phase, using as paths
just
those paths that have been detected as changed and not yet
marked
as successfully completed. Use this command to quickly restart
Unison on just the set of paths still needing attention after a
previous run.
* Made the ignorecase preference user-visible, and changed the
initialization code so that it can be manually set to true, even
if neither host is running Windows. (This may be useful, e.g.,
when using Unison running on a Unix system with a FAT volume
mounted.)
* Small improvements and bug fixes:
+ Errors in preference files now generate fatal errors rather
than warnings at startup time. (I.e., you can't go on from
them.) Also, we fixed a bug that was preventing these
warnings from appearing in the text UI, so some users who
have been running (unsuspectingly) with garbage in their
prefs files may now get error reports.
+ Error reporting for preference files now provides file name
and line number.
+ More intelligible message in the case of identical
change to
the same files: "Nothing to do: replicas have been changed
only in identical ways since last sync."
+ Files with prefix '.#' excluded when scanning for
preference
files.
+ Rsync instructions are send directly instead of first
marshaled.
+ Won't try forever to get the fingerprint of a continuously
changing file: unison will give up after certain number of
retries.
+ Other bug fixes, including the one reported by Peter
Selinger
(force=older preference not working).
* Compilation:
+ Upgraded to the new OCaml 3.04 compiler, with the LablGtk
1.2.3 library (patched version used for compiling under
Windows).
+ Added the option to compile unison on the Windows platform
with Cygwin GNU C compiler. This option only supports
building dynamically linked unison executables.

Changes since 2.7.4:
* Fixed a silly (but debilitating) bug in the client startup
sequence.

Changes since 2.7.1:
* Added addprefsto preference, which (when set) controls which
preference file new preferences (e.g. new ignore patterns) are
added to.
* Bug fix: read the initial connection header one byte at a
time, so
that we don't block if the header is shorter than expected.
(This
bug did not affect normal operation -- it just made it hard to
tell when you were trying to use Unison incorrectly with an old
version of the server, since it would hang instead of giving an
error message.)

Changes since 2.6.59:
* Changed fastcheck from a boolean to a string preference. Its
legal
values are yes (for a fast check), no (for a safe check), or
default (for a fast check--which also happens to be safe--when
running on Unix and a safe check when on Windows). The
default is
default.
* Several preferences have been renamed for consistency. All
preference names are now spelled out in lowercase. For backward
compatibility, the old names still work, but they are not
mentioned in the manual any more.
* The temp files created by the 'diff' and 'merge' commands are
now
named by prepending a new prefix to the file name, rather than
appending a suffix. This should avoid confusing diff/merge
programs that depend on the suffix to guess the type of the file
contents.
* We now set the keepalive option on the server socket, to make
sure
that the server times out if the communication link is
unexpectedly broken.
* Bug fixes:
+ When updating small files, Unison now closes the
destination
file.
+ File permissions are properly updated when the file is
behind
a followed link.
+ Several other small fixes.

Changes since 2.6.38:
* Major Windows performance improvement!
We've added a preference fastcheck that makes Unison look
only at
a file's creation time and last-modified time to check
whether it
has changed. This should result in a huge speedup when checking
for updates in large replicas.
When this switch is set, Unison will use file creation times as
'pseudo inode numbers' when scanning Windows replicas for
updates,
instead of reading the full contents of every file. This may
cause
Unison to miss propagating an update if the create time,
modification time, and length of the file are all unchanged
by the
update (this is not easy to achieve, but it can be done).
However,
Unison will never overwrite such an update with a change from
the
other replica, since it always does a safe check for updates
just
before propagating a change. Thus, it is reasonable to use this
switch most of the time and occasionally run Unison once with
fastcheck set to false, if you are worried that Unison may have
overlooked an update.
Warning: This change is has not yet been thoroughly field-
tested.
If you set the fastcheck preference, pay careful attention to
what
Unison is doing.
* New functionality: centralized backups and merging
+ This version incorporates two pieces of major new
functionality, implemented by Sylvain Roy during a summer
internship at Penn: a centralized backup facility that
keeps
a full backup of (selected files in) each replica, and a
merging feature that allows Unison to invoke an external
file-merging tool to resolve conflicting changes to
individual files.
+ Centralized backups:
o Unison now maintains full backups of the
last-synchronized versions of (some of) the files in
each replica; these function both as backups in the
usual sense and as the "common version" when invoking
external merge programs.
o The backed up files are stored in a directory
/.unison/backup on each host. (The name of this
directory can be changed by setting the environment
variable UNISONBACKUPDIR.)
o The predicate backup controls which files are actually
backed up: giving the preference 'backup = Path *'
causes backing up of all files.
o Files are added to the backup directory whenever
unison
updates its archive. This means that
# When unison reconstructs its archive from scratch
(e.g., because of an upgrade, or because the
archive files have been manually deleted), all
files will be backed up.
# Otherwise, each file will be backed up the first
time unison propagates an update for it.
o The preference backupversions controls how many
previous
versions of each file are kept. The default is 2
(i.e.,
the last synchronized version plus one backup).
o For backward compatibility, the backups preference is
also still supported, but backup is now preferred.
o It is OK to manually delete files from the backup
directory (or to throw away the directory itself).
Before unison uses any of these files for anything
important, it checks that its fingerprint matches the
one that it expects.
+ Merging:
o Both user interfaces offer a new 'merge' command,
invoked by pressing 'm' (with a changed file
selected).
o The actual merging is performed by an external
program.
The preferences merge and merge2 control how this
program is invoked. If a backup exists for this file
(see the backup preference), then the merge preference
is used for this purpose; otherwise merge2 is used. In
both cases, the value of the preference should be a
string representing the command that should be
passed to
a shell to invoke the merge program. Within this
string,
the special substrings CURRENT1, CURRENT2, NEW, and
OLD
may appear at any point. Unison will substitute
these as
follows before invoking the command:
# CURRENT1 is replaced by the name of the local
copy
of the file;
# CURRENT2 is replaced by the name of a temporary
file, into which the contents of the remote
copy of
the file have been transferred by Unison prior to
performing the merge;
# NEW is replaced by the name of a temporary file
that Unison expects to be written by the merge
program when it finishes, giving the desired new
contents of the file; and
# OLD is replaced by the name of the backed up copy
of the original version of the file (i.e., its
state at the end of the last successful run of
Unison), if one exists (applies only to merge,
not
merge2).
For example, on Unix systems setting the merge
preference to
merge = diff3 -m CURRENT1 OLD CURRENT2 > NEW
will tell Unison to use the external diff3 program for
merging.
A large number of external merging programs are
available. For example, emacs users may find the
following convenient:
merge2 = emacs -q --eval '(ediff-merge-files "CURRENT1" "CURRENT2"
nil "NEW")'
merge = emacs -q --eval '(ediff-merge-files-with-ancestor
"CURRENT1" "CURRENT2" "OLD" nil "NEW")'
(These commands are displayed here on two lines to
avoid
running off the edge of the page. In your preference
file, each should be written on a single line.)
o If the external program exits without leaving any file
at the path NEW, Unison considers the merge to have
failed. If the merge program writes a file called NEW
but exits with a non-zero status code, then Unison
considers the merge to have succeeded but to have
generated conflicts. In this case, it attempts to
invoke
an external editor so that the user can resolve the
conflicts. The value of the editor preference controls
what editor is invoked by Unison. The default is
emacs.
o Please send us suggestions for other useful values of
the merge2 and merge preferences - we'd like to give
several examples in the manual.
* Smaller changes:
+ When one preference file includes another, unison no longer
adds the suffix '.prf' to the included file by default.
If a
file with precisely the given name exists in the .unison
directory, it will be used; otherwise Unison will add .prf,
as it did before. (This change means that included
preference
files can be named blah.include instead of blah.prf, so
that
unison will not offer them in its 'choose a preference
file'
dialog.)
+ For Linux systems, we now offer both a statically linked
and
a dynamically linked executable. The static one is larger,
but will probably run on more systems, since it doesn't
depend on the same versions of dynamically linked library
modules being available.
+ Fixed the force and prefer preferences, which were getting
the propagation direction exactly backwards.
+ Fixed a bug in the startup code that would cause unison to
crash when the default profile (~/.unison/default.prf) does
not exist.
+ Fixed a bug where, on the run when a profile is first
created, Unison would confusingly display the roots in
reverse order in the user interface.
* For developers:
+ We've added a module dependency diagram to the source
distribution, in src/DEPENDENCIES.ps, to help new
prospective
developers with navigating the code.

Changes since 2.6.11:
* INCOMPATIBLE CHANGE: Archive format has changed.
* INCOMPATIBLE CHANGE: The startup sequence has been completely
rewritten and greatly simplified. The main user-visible
change is
that the defaultpath preference has been removed. Its effect can
be approximated by using multiple profiles, with include
directives to incorporate common settings. All uses of
defaultpath
in existing profiles should be changed to path.
Another change in startup behavior that will affect some
users is
that it is no longer possible to specify roots both in the
profile
and on the command line.
You can achieve a similar effect, though, by breaking your
profile
into two:

default.prf =
root = blah
root = foo
include common

common.prf =
<everything else>
Now do
unison common root1 root2
when you want to specify roots explicitly.
* The -prefer and -force options have been extended to allow users
to specify that files with more recent modtimes should be
propagated, writing either -prefer newer or -force newer. (For
symmetry, Unison will also accept -prefer older or -force
older.)
The -force older/newer options can only be used when -times is
also set.
The graphical user interface provides access to these facilities
on a one-off basis via the Actions menu.
* Names of roots can now be "aliased" to allow replicas to be
relocated without changing the name of the archive file where
Unison stores information between runs. (This feature is for
experts only. See the "Archive Files" section of the manual for
more information.)
* Graphical user-interface:
+ A new command is provided in the Synchronization menu for
switching to a new profile without restarting Unison from
scratch.
+ The GUI also supports one-key shortcuts for commonly used
profiles. If a profile contains a preference of the form
'key
= n', where n is a single digit, then pressing this key
will
cause Unison to immediately switch to this profile and
begin
synchronization again from scratch. (Any actions that may
have been selected for a set of changes currently being
displayed will be discarded.)
+ Each profile may include a preference 'label = <string>'
giving a descriptive string that described the options
selected in this profile. The string is listed along
with the
profile name in the profile selection dialog, and displayed
in the top-right corner of the main Unison window.
* Minor:
+ Fixed a bug that would sometimes cause the 'diff'
display to
order the files backwards relative to the main user
interface. (Thanks to Pascal Brisset for this fix.)
+ On Unix systems, the graphical version of Unison will check
the DISPLAY variable and, if it is not set, automatically
fall back to the textual user interface.
+ Synchronization paths (path preferences) are now matched
against the ignore preferences. So if a path is both
specified in a path preference and ignored, it will be
skipped.
+ Numerous other bugfixes and small improvements.

Changes since 2.6.1:
* The synchronization of modification times has been disabled for
directories.
* Preference files may now include lines of the form include
<name>,
which will cause name.prf to be read at that point.
* The synchronization of permission between Windows and Unix now
works properly.
* A binding CYGWIN=binmode in now added to the environment so that
the Cygwin port of OpenSSH works properly in a non-Cygwin
context.
* The servercmd and addversionno preferences can now be used
together: -addversionno appends an appropriate -NNN to the
server
command, which is found by using the value of the -servercmd
preference if there is one, or else just unison.
* Both '-pref=val' and '-pref val' are now allowed for boolean
values. (The former can be used to set a preference to false.)
* Lot of small bugs fixed.

Changes since 2.5.31:
* The log preference is now set to true by default, since the log
file seems useful for most users.
* Several miscellaneous bugfixes (most involving symlinks).

Changes since 2.5.25:
* INCOMPATIBLE CHANGE: Archive format has changed (again).
* Several significant bugs introduced in 2.5.25 have been fixed.

Changes since 2.5.1:
* INCOMPATIBLE CHANGE: Archive format has changed. Make sure you
synchronize your replicas before upgrading, to avoid spurious
conflicts. The first sync after upgrading will be slow.
* New functionality:
+ Unison now synchronizes file modtimes, user-ids, and
group-ids.
These new features are controlled by a set of new
preferences, all of which are currently false by default.
o When the times preference is set to true, file
modification times are propaged. (Because the
representations of time may not have the same
granularity on both replicas, Unison may not always be
able to make the modtimes precisely equal, but it will
get them as close as the operating systems involved
allow.)
o When the owner preference is set to true, file
ownership
information is synchronized.
o When the group preference is set to true, group
information is synchronized.
o When the numericIds preference is set to true,
owner and
group information is synchronized numerically. By
default, owner and group numbers are converted to
names
on each replica and these names are synchronized. (The
special user id 0 and the special group 0 are never
mapped via user/group names even if this preference is
not set.)
+ Added an integer-valued preference perms that can be
used to
control the propagation of permission bits. The value of
this
preference is a mask indicating which permission bits
should
be synchronized. It is set by default to 0o1777: all
bits but
the set-uid and set-gid bits are synchronised
(synchronizing
theses latter bits can be a security hazard). If you
want to
synchronize all bits, you can set the value of this
preference to -1.
+ Added a log preference (default false), which makes Unison
keep a complete record of the changes it makes to the
replicas. By default, this record is written to a file
called
unison.log in the user's home directory (the value of the
HOME environment variable). If you want it someplace else,
set the logfile preference to the full pathname you want
Unison to use.
+ Added an ignorenot preference that maintains a set of
patterns for paths that should definitely not be ignored,
whether or not they match an ignore pattern. (That is, a
path
will now be ignored iff it matches an ignore pattern and
does
not match any ignorenot patterns.)
* User-interface improvements:
+ Roots are now displayed in the user interface in the same
order as they were given on the command line or in the
preferences file.
+ When the batch preference is set, the graphical user
interface no longer waits for user confirmation when it
displays a warning message: it simply pops up an advisory
window with a Dismiss button at the bottom and keeps on
going.
+ Added a new preference for controlling how many status
messages are printed during update detection: statusdepth
controls the maximum depth for paths on the local machine
(longer paths are not displayed, nor are non-directory
paths). The value should be an integer; default is 1.
+ Removed the trace and silent preferences. They did not seem
very useful, and there were too many preferences for
controlling output in various ways.
+ The text UI now displays just the default command (the one
that will be used if the user just types <return>)
instead of
all available commands. Typing ? will print the full
list of
possibilities.
+ The function that finds the canonical hostname of the local
host (which is used, for example, in calculating the
name of
the archive file used to remember which files have been
synchronized) normally uses the gethostname operating
system
call. However, if the environment variable
UNISONLOCALHOSTNAME is set, its value will now be used
instead. This makes it easier to use Unison in situations
where a machine's name changes frequently (e.g., because it
is a laptop and gets moved around a lot).
+ File owner and group are now displayed in the "detail
window"
at the bottom of the screen, when unison is configured to
synchronize them.
* For hackers:
+ Updated to Jacques Garrigue's new version of lablgtk, which
means we can throw away our local patched version.
If you're compiling the GTK version of unison from sources,
you'll need to update your copy of lablgtk to the
developers
release. (Warning: installing lablgtk under Windows is
currently a bit challenging.)
+ The TODO.txt file (in the source distribution) has been
cleaned up and reorganized. The list of pending tasks
should
be much easier to make sense of, for people that may
want to
contribute their programming energies. There is also a
separate file BUGS.txt for open bugs.
+ The Tk user interface has been removed (it was not being
maintained and no longer compiles).
+ The debug preference now prints quite a bit of additional
information that should be useful for identifying
sources of
problems.
+ The version number of the remote server is now checked
right
away during the connection setup handshake, rather than
later. (Somebody sent a bug report of a server crash that
turned out to come from using inconsistent versions: better
to check this earlier and in a way that can't crash either
client or server.)
+ Unison now runs correctly on 64-bit architectures (e.g.
Alpha
linux). We will not be distributing binaries for these
architectures ourselves (at least for a while) but if
someone
would like to make them available, we'll be glad to
provide a
link to them.
* Bug fixes:
+ Pattern matching (e.g. for ignore) is now case-insensitive
when Unison is in case-insensitive mode (i.e., when one of
the replicas is on a windows machine).
+ Some people had trouble with mysterious failures during
propagation of updates, where files would be falsely
reported
as having changed during synchronization. This should be
fixed.
+ Numerous smaller fixes.

Changes since 2.4.1:
* Added a number of 'sorting modes' for the user interface. By
default, conflicting changes are displayed at the top, and the
rest of the entries are sorted in alphabetical order. This
behavior can be changed in the following ways:
+ Setting the sortnewfirst preference to true causes newly
created files to be displayed before changed files.
+ Setting sortbysize causes files to be displayed in
increasing
order of size.
+ Giving the preference sortfirst=<pattern> (where
<pattern> is
a path descriptor in the same format as 'ignore' and
'follow'
patterns, causes paths matching this pattern to be
displayed
first.
+ Similarly, giving the preference sortlast=<pattern> causes
paths matching this pattern to be displayed last.
The sorting preferences are described in more detail in the user
manual. The sortnewfirst and sortbysize flags can also be
accessed
from the 'Sort' menu in the grpahical user interface.
* Added two new preferences that can be used to change unison's
fundamental behavior to make it more like a mirroring tool
instead
of a synchronizer.
+ Giving the preference prefer with argument <root> (by
adding
-prefer <root> to the command line or prefer=<root>) to
your
profile) means that, if there is a conflict, the
contents of
<root> should be propagated to the other replica (with no
questions asked). Non-conflicting changes are treated as
usual.
+ Giving the preference force with argument <root> will make
unison resolve all differences in favor of the given root,
even if it was the other replica that was changed.
These options should be used with care! (More information is
available in the manual.)
* Small changes:
+ Changed default answer to 'Yes' in all two-button
dialogs in
the graphical interface (this seems more intuitive).
+ The rsync preference has been removed (it was used to
activate rsync compression for file transfers, but rsync
compression is now enabled by default).
+ In the text user interface, the arrows indicating which
direction changes are being propagated are printed
differently when the user has overridded Unison's default
recommendation (====> instead of ---->). This matches the
behavior of the graphical interface, which displays such
arrows in a different color.
+ Carriage returns (Control-M's) are ignored at the ends of
lines in profiles, for Windows compatibility.
+ All preferences are now fully documented in the user
manual.

Changes since 2.3.12:
* INCOMPATIBLE CHANGE: Archive format has changed. Make sure you
synchronize your replicas before upgrading, to avoid spurious
conflicts. The first sync after upgrading will be slow.
* New/improved functionality:
+ A new preference -sortbysize controls the order in which
changes are displayed to the user: when it is set to true,
the smallest changed files are displayed first. (The
default
setting is false.)
+ A new preference -sortnewfirst causes newly created
files to
be listed before other updates in the user interface.
+ We now allow the ssh protocol to specify a port.
+ Incompatible change: The unison: protocol is deprecated,
and
we added file: and socket:. You may have to modify your
profiles in the .unison directory. If a replica is
specified
without an explicit protocol, we now assume it refers to a
file. (Previously "//saul/foo" meant to use SSH to
connect to
saul, then access the foo directory. Now it means to access
saul via a remote file mechanism such as samba; the old
effect is now achieved by writing ssh://saul/foo.)
+ Changed the startup sequence for the case where roots are
given but no profile is given on the command line. The new
behavior is to use the default profile (creating it if it
does not exist), and temporarily override its roots. The
manual claimed that this case would work by reading no
profile at all, but AFAIK this was never true.
+ In all user interfaces, files with conflicts are always
listed first
+ A new preference 'sshversion' can be used to control which
version of ssh should be used to connect to the server.
Legal
values are 1 and 2. (Default is empty, which will make
unison
use whatever version of ssh is installed as the default
'ssh'
command.)
+ The situation when the permissions of a file was updated
the
same on both side is now handled correctly (we used to
report
a spurious conflict)
* Improvements for the Windows version:
+ The fact that filenames are treated case-insensitively
under
Windows should now be handled correctly. The exact behavior
is described in the cross-platform section of the manual.
+ It should be possible to synchronize with Windows shares,
e.g., //host/drive/path.
+ Workarounds to the bug in syncing root directories in
Windows. The most difficult thing to fix is an ocaml bug:
Unix.opendir fails on c: in some versions of Windows.
* Improvements to the GTK user interface (the Tk interface is no
longer being maintained):
+ The UI now displays actions differently (in blue) when they
have been explicitly changed by the user from Unison's
default recommendation.
+ More colorful appearance.
+ The initial profile selection window works better.
+ If any transfers failed, a message to this effect is
displayed along with 'Synchronization complete' at the
end of
the transfer phase (in case they may have scrolled off the
top).
+ Added a global progress meter, displaying the percentage of
total bytes that have been transferred so far.
* Improvements to the text user interface:
+ The file details will be displayed automatically when a
conflict is been detected.
+ when a warning is generated (e.g. for a temporary file left
over from a previous run of unison) Unison will no longer
wait for a response if it is running in -batch mode.
+ The UI now displays a short list of possible inputs each
time
it waits for user interaction.
+ The UI now quits immediately (rather than looping back and
starting the interaction again) if the user presses 'q'
when
asked whether to propagate changes.
+ Pressing 'g' in the text user interface will proceed
immediately with propagating updates, without asking any
more
questions.
* Documentation and installation changes:
+ The manual now includes a FAQ, plus sections on common
problems and on tricks contributed by users.
+ Both the download page and the download directory
explicitly
say what are the current stable and beta-test version
numbers.
+ The OCaml sources for the up-to-the-minute developers'
version (not guaranteed to be stable, or even to
compile, at
any given time!) are now available from the download page.
+ Added a subsection to the manual describing cross-platform
issues (case conflicts, illegal filenames)
* Many small bug fixes and random improvements.

Changes since 2.3.1:
* Several bug fixes. The most important is a bug in the rsync
module
that would occasionally cause change propagation to fail with a
'rename' error.

Changes since 2.2:
* The multi-threaded transport system is now disabled by default.
(It is not stable enough yet.)
* Various bug fixes.
* A new experimental feature:
The final component of a -path argument may now be the wildcard
specifier *. When Unison sees such a path, it expands this
path on
the client into into the corresponding list of paths by listing
the contents of that directory.
Note that if you use wildcard paths from the command line, you
will probably need to use quotes or a backslash to prevent the *
from being interpreted by your shell.
If both roots are local, the contents of the first one will be
used for expanding wildcard paths. (Nb: this is the first one
after the canonization step - i.e., the one that is listed first
in the user interface - not the one listed first on the command
line or in the preferences file.)

Changes since 2.1:
* The transport subsystem now includes an implementation by
Sylvain
Gommier and Norman Ramsey of Tridgell and Mackerras's rsync
protocol. This protocol achieves much faster transfers when
only a
small part of a large file has been changed by sending just
diffs.
This feature is mainly helpful for transfers over slow links--on
fast local area networks it can actually degrade performance--so
we have left it off by default. Start unison with the -rsync
option (or put rsync=true in your preferences file) to turn
it on.
* "Progress bars" are now diplayed during remote file transfers,
showing what percentage of each file has been transferred so
far.
* The version numbering scheme has changed. New releases will
now be
have numbers like 2.2.30, where the second component is
incremented on every significant public release and the third
component is the "patch level."
* Miscellaneous improvements to the GTK-based user interface.
* The manual is now available in PDF format.
* We are experimenting with using a multi-threaded transport
subsystem to transfer several files at the same time, making
much
more effective use of available network bandwidth. This
feature is
not completely stable yet, so by default it is disabled in the
release version of Unison.
If you want to play with the multi-threaded version, you'll need
to recompile Unison from sources (as described in the
documentation), setting the THREADS flag in Makefile.OCaml to
true. Make sure that your OCaml compiler has been installed with
the -with-pthreads configuration option. (You can verify this by
checking whether the file threads/threads.cma in the OCaml
standard library directory contains the string -lpthread near
the
end.)

Changes since 1.292:
* Reduced memory footprint (this is especially important during
the
first run of unison, where it has to gather information about
all
the files in both repositories).
* Fixed a bug that would cause the socket server under NT to fail
after the client exits.
* Added a SHIFT modifier to the Ignore menu shortcut keys in GTK
interface (to avoid hitting them accidentally).

Changes since 1.231:
* Tunneling over ssh is now supported in the Windows version. See
the installation section of the manual for detailed
instructions.
* The transport subsystem now includes an implementation of the
rsync protocol, built by Sylvain Gommier and Norman Ramsey. This
protocol achieves much faster transfers when only a small
part of
a large file has been changed by sending just diffs. The rsync
feature is off by default in the current version. Use the -rsync
switch to turn it on. (Nb. We still have a lot of tuning to do:
you may not notice much speedup yet.)
* We're experimenting with a multi-threaded transport subsystem,
written by Jerome Vouillon. The downloadable binaries are still
single-threaded: if you want to try the multi-threaded version,
you'll need to recompile from sources. (Say make THREADS=true.)
Native thread support from the compiler is required. Use the
option -threads N to select the maximal number of concurrent
threads (default is 5). Multi-threaded and single-threaded
clients/servers can interoperate.
* A new GTK-based user interface is now available, thanks to
Jacques
Garrigue. The Tk user interface still works, but we'll be
shifting
development effort to the GTK interface from now on.
* OCaml 3.00 is now required for compiling Unison from sources.
The
modules uitk and myfileselect have been changed to use labltk
instead of camltk. To compile the Tk interface in Windows, you
must have ocaml-3.00 and tk8.3. When installing tk8.3, put it in
c:\Tcl rather than the suggested c:\Program Files\Tcl, and be
sure
to install the headers and libraries (which are not installed by
default).
* Added a new -addversionno switch, which causes unison to use
unison-<currentversionnumber> instead of just unison as the
remote
server command. This allows multiple versions of unison to
coexist
conveniently on the same server: whichever version is run on the
client, the same version will be selected on the server.

Changes since 1.219:
* INCOMPATIBLE CHANGE: Archive format has changed. Make sure you
synchronize your replicas before upgrading, to avoid spurious
conflicts. The first sync after upgrading will be slow.
* This version fixes several annoying bugs, including:
+ Some cases where propagation of file permissions was not
working.
+ umask is now ignored when creating directories
+ directories are create writable, so that a read-only
directory and its contents can be propagated.
+ Handling of warnings generated by the server.
+ Synchronizing a path whose parent is not a directory on
both
sides is now flagged as erroneous.
+ Fixed some bugs related to symnbolic links and nonexistant
roots.
o When a change (deletion or new contents) is propagated
onto a 'follow'ed symlink, the file pointed to by the
link is now changed. (We used to change the link
itself,
which doesn't fit our assertion that 'follow' means
the
link is completely invisible)
o When one root did not exist, propagating the other
root
on top of it used to fail, becuase unison could not
calculate the working directory into which to write
changes. This should be fixed.
* A human-readable timestamp has been added to Unison's archive
files.
* The semantics of Path and Name regular expressions now
correspond
better.
* Some minor improvements to the text UI (e.g. a command for going
back to previous items)
* The organization of the export directory has changed --
should be
easier to find / download things now.

Changes since 1.200:
* INCOMPATIBLE CHANGE: Archive format has changed. Make sure you
synchronize your replicas before upgrading, to avoid spurious
conflicts. The first sync after upgrading will be slow.
* This version has not been tested extensively on Windows.
* Major internal changes designed to make unison safer to run
at the
same time as the replicas are being changed by the user.
* Internal performance improvements.

Changes since 1.190:
* INCOMPATIBLE CHANGE: Archive format has changed. Make sure you
synchronize your replicas before upgrading, to avoid spurious
conflicts. The first sync after upgrading will be slow.
* A number of internal functions have been changed to reduce the
amount of memory allocation, especially during the first
synchronization. This should help power users with very big
replicas.
* Reimplementation of low-level remote procedure call stuff, in
preparation for adding rsync-like smart file transfer in a later
release.
* Miscellaneous bug fixes.

Changes since 1.180:
* INCOMPATIBLE CHANGE: Archive format has changed. Make sure you
synchronize your replicas before upgrading, to avoid spurious
conflicts. The first sync after upgrading will be slow.
* Fixed some small bugs in the interpretation of ignore patterns.
* Fixed some problems that were preventing the Windows version
from
working correctly when click-started.
* Fixes to treatment of file permissions under Windows, which were
causing spurious reports of different permissions when
synchronizing between windows and unix systems.
* Fixed one more non-tail-recursive list processing function,
which
was causing stack overflows when synchronizing very large
replicas.

Changes since 1.169:
* The text user interface now provides commands for ignoring
files.
* We found and fixed some more non-tail-recursive list processing
functions. Some power users have reported success with very
large
replicas.
* INCOMPATIBLE CHANGE: Files ending in .tmp are no longer ignored
automatically. If you want to ignore such files, put an
appropriate ignore pattern in your profile.
* INCOMPATIBLE CHANGE: The syntax of ignore and follow patterns
has
changed. Instead of putting a line of the form
ignore = <regexp>
in your profile (.unison/default.prf), you should put:
ignore = Regexp <regexp>
Moreover, two other styles of pattern are also recognized:
ignore = Name <name>
matches any path in which one component matches <name>, while
ignore = Path <path>
matches exactly the path <path>.
Standard "globbing" conventions can be used in <name> and
<path>:
+ a ? matches any single character except /
+ a * matches any sequence of characters not including /
+ [xyz] matches any character from the set {x, y, z }
+ {a,bb,ccc} matches any one of a, bb, or ccc.
See the user manual for some examples.

Changes since 1.146:
* Some users were reporting stack overflows when synchronizing
huge
directories. We found and fixed some non-tail-recursive list
processing functions, which we hope will solve the problem.
Please
give it a try and let us know.
* Major additions to the documentation.

Changes since 1.142:
* Major internal tidying and many small bugfixes.
* Major additions to the user manual.
* Unison can now be started with no arguments - it will prompt
automatically for the name of a profile file containing the
roots
to be synchronized. This makes it possible to start the
graphical
UI from a desktop icon.
* Fixed a small bug where the text UI on NT was raising a 'no such
signal' exception.

Changes since 1.139:
* The precompiled windows binary in the last release was compiled
with an old OCaml compiler, causing propagation of
permissions not
to work (and perhaps leading to some other strange behaviors
we've
heard reports about). This has been corrected. If you're using
precompiled binaries on Windows, please upgrade.
* Added a -debug command line flag, which controls debugging of
various modules. Say -debug XXX to enable debug tracing for
module
XXX, or -debug all to turn on absolutely everything.
* Fixed a small bug where the text UI on NT was raising a 'no such
signal' exception.

Changes since 1.111:
* INCOMPATIBLE CHANGE: The names and formats of the preference
files
in the .unison directory have changed. In particular:
+ the file "prefs" should be renamed to default.prf
+ the contents of the file "ignore" should be merged into
default.prf. Each line of the form REGEXP in ignore should
become a line of the form ignore = REGEXP in default.prf.
* Unison now handles permission bits and symbolic links. See the
manual for details.
* You can now have different preference files in your .unison
directory. If you start unison like this
unison profilename
(i.e. with just one "anonymous" command-line argument), then the
file ~/.unison/profilename.prf will be loaded instead of
default.prf.
* Some improvements to terminal handling in the text user
interface
* Added a switch -killServer that terminates the remote server
process when the unison client is shutting down, even when using
sockets for communication. (By default, a remote server created
using ssh/rsh is terminated automatically, while a socket server
is left running.)
* When started in 'socket server' mode, unison prints 'server
started' on stderr when it is ready to accept connections. (This
may be useful for scripts that want to tell when a socket-mode
server has finished initalization.)
* We now make a nightly mirror of our current internal development
tree, in case anyone wants an up-to-the-minute version to hack
around with.
* Added a file CONTRIB with some suggestions for how to help us
make
Unison better.

Changes in Version 2.17.1

Changes since 2.7.78:
* Small bugfix to textual user interface under Unix (to avoid
leaving the terminal in a bad state where it would not echo
inputs
after Unison exited).

Changes since 2.7.4:
* Fixed a silly (but debilitating) bug in the client startup
sequence.

default.prf =
root = blah
root = foo
include common

Changes since 2.5.31:
* The log preference is now set to true by default, since the log
file seems useful for most users.
* Several miscellaneous bugfixes (most involving symlinks).

Changes since 2.5.25:
* INCOMPATIBLE CHANGE: Archive format has changed (again).
* Several significant bugs introduced in 2.5.25 have been fixed.

Changes since 2.3.1:
* Several bug fixes. The most important is a bug in the rsync
module
that would occasionally cause change propagation to fail with a
'rename' error.

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<font face=arial size=-1><a href="http://us.ard.yahoo.com/SIG=12h2crag0/M=362335.6886445.7839731.1510227/D=groups/S=1705004726:TM/Y=YAHOO/EXP=1123824086/A=2894361/R=0/SIG=13jmebhbo/*http://www.networkforgood.org/topics/education/digitaldivide/?source=YAHOO&cmpgn=GRP&RTP=http://groups.yahoo.com/">In low income neighborhoods, 84% do not own computers. At Network for Good, help bridge the Digital Divide!</a>.</font>
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