rsync - Jul 2010 - Can rsyncd be set to require compression?

Hi,

rsyncd.conf allows you to forbid compression.  I'd like a way
for it to require compression, either by forcing the option
on or forbidding transfers from clients that don't request
--compress

Is such a thing possible?

Regards,

David.

On Thu, Jul 15, 2010 at 10:03 AM, David F. Skoll <dfs at
roaringpenguin.com>wrote:
> I'd like a way for it to require compression

You could try using a "pre-xfer exec" script, which lets you look over
the
users options in the environment variables.  For instance, there's a z in
here, even when -s (--protect-args) is used:

RSYNC_ARG3=-vogDtprIze31.12iLs

If you make a script that scans the arg variables and exits with an error
code when z is not found, rsync will refuse the transfer.  Just be careful
not to look for letters in an arg value.

A simple perl script that works:

#!/usr/bin/perl
use strict;
# arg 0 is the rsyncd script, so start with arg 1
for (my $j = 1; $j < 1024; $j++) {
    my $var = "RSYNC_ARG$j";
    my $val = $ENV{$var};
    exit 1 unless defined $val;
    # These single-char letters that have no arg were filched from
support/rrsync script:
    exit 0 if $val =~ /^-[ACDEHIKLORSWXbcdgklmnoprstuvx]*z/;
}
exit 1;

..wayne..
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.samba.org/pipermail/rsync/attachments/20100731/354781ef/attachment.html>

Wayne Davison wrote:
> You could try using a "pre-xfer exec" script, which lets you look
over the
> users options in the environment variables.
Ah, thanks for that suggestion!  I will look into that.

Regards,

David.