Note rsyncd-over-ssh and documentation TODOs.

[rsync/rsync.git] / TODO

-*- indented-text -*-

URGENT ---------------------------------------------------------------


IMPORTANT ------------------------------------------------------------

Cross-test versions

  Part of the regression suite should be making sure that we don't
  break backwards compatibility: old clients vs new servers and so
  on.  Ideally we would test the cross product of versions.  

  It might be sufficient to test downloads from well-known public
  rsync servers running different versions of rsync.  This will give
  some testing and also be the most common case for having different
  versions and not being able to upgrade.

use chroot

  If the platform doesn't support it, then don't even try.

  If running as non-root, then don't fail, just give a warning.
  (There was a thread about this a while ago?)

    http://lists.samba.org/pipermail/rsync/2001-August/thread.html
    http://lists.samba.org/pipermail/rsync/2001-September/thread.html

--files-from

  Avoids traversal.  Better option than a pile of --include statements
  for people who want to generate the file list using a find(1)
  command or a script.

Performance

  Traverse just one directory at a time.  Tridge says it's possible.
 
  Can possibly also be smarter about memory use while looking for hard
  links by reducing the refcount as we find alternative names.

IPv6

  Implement suggestions from http://www.kame.net/newsletter/19980604/
  and ftp://ftp.iij.ad.jp/pub/RFC/rfc2553.txt

  If a host has multiple addresses, then listen try to connect to all
  in order until we get through.  (getaddrinfo may return multiple
  addresses.)  This is kind of implemented already.

  Possibly also when starting as a server we may need to listen on
  multiple passive addresses.  This might be a bit harder, because we
  may need to select on all of them.  Hm.

  Define a syntax for IPv6 literal addresses.  Since they include
  colons, they tend to break most naming systems, including ours.
  Based on the HTTP IPv6 syntax, I think we should use
 
     rsync://[::1]/foo/bar
     [::1]::bar

  which should just take a small change to the parser code.

Errors

  If we hang or get SIGINT, then explain where we were up to.  Perhaps
  have a static buffer that contains the current function name, or
  some kind of description of what we were trying to do.  This is a
  little easier on people than needing to run strace/truss.

  "The dungeon collapses!  You are killed."  Rather than "unexpected
  eof" give a message that is more detailed if possible and also more
  helpful.  

File attributes

  Device major/minor numbers should be at least 32 bits each.  See
  http://lists.samba.org/pipermail/rsync/2001-November/005357.html

  Transfer ACLs.  Need to think of a standard representation.
  Probably better not to even try to convert between NT and POSIX.
  Possibly can share some code with Samba.

Empty directories

  With the current common --include '*/' --exclude '*' pattern, people
  can end up with many empty directories.  We might avoid this by
  lazily creating such directories.

zlib

  Perhaps don't use our own zlib.  Will we actually be incompatible,
  or just be slightly less efficient?

logging

  Perhaps flush stdout after each filename, so that people trying to
  monitor progress in a log file can do so more easily.  See
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=48108

rsyncd over ssh

  There are already some patches to do this.

PLATFORMS ------------------------------------------------------------

Win32

  Don't detach, because this messes up --srvany.

  http://sources.redhat.com/ml/cygwin/2001-08/msg00234.html

  According to "Effective TCP/IP Programming" (??) close() on a socket
  has incorrect behaviour on Windows -- it sends a RST packet to the
  other side, which gives a "connection reset by peer" error.  On that
  platform we should probably do shutdown() instead.  However, on Unix
  we are correct to call close(), because shutdown() discards
  untransmitted data.

DOCUMENTATION --------------------------------------------------------

Update README

BUILD FARM -----------------------------------------------------------

Add machines

  AMDAHL UTS (Dave Dykstra)

  Cygwin (on different versions of Win32?)

  HP-UX variants (via HP?)

  SCO

NICE -----------------------------------------------------------------

SIGHUP

  Re-read config file (just exec() ourselves) rather than exiting.

--no-detach and --no-fork options

  Very useful for debugging.  Also good when running under a
  daemon-monitoring process that tries to restart the service when the
  parent exits.

hang/timeout friendliness

  On 

internationalization

  Change to using gettext().  Probably need to ship this for platforms
  that don't have it.  

  Solicit translations.

  Does anyone care?

rsyncsh 

   Write a small emulation of interactive ftp as a Pythonn program
   that calls rsync.  Commands such as "cd", "ls", "ls *.c" etc map
   fairly directly into rsync commands: it just needs to remember the
   current host, directory and so on.  We can probably even do
   completion of remote filenames.