Yes, that's the best workaround. Since BackupPC 4.x uses rsync_bpc on the
host (which is native rsync, modified to access the BackupPC storage),
unfortunately this is internal to how rsync specifies and executes the
remote command.
The problem, as you observed, is that rsync adds the host name to whatever
you specify in $Conf{RsyncSshArgs}. So you need something that will
consume and ignore the first argument. The form I use is "sudo -p", since
the prompt is not used for password-less ssh:
$Conf{RsyncSshArgs} = ['-e', '/usr/bin/sudo -p'];
Craig
On Fri, May 3, 2019 at 3:14 PM <backu...@kosowsky.org> wrote:
> backu...@kosowsky.org wrote at about 00:53:24 -0400 on Friday, May 3,
> 2019:
> > backu...@kosowsky.org wrote at about 00:11:50 -0400 on Friday, May 3,
> 2019:
> > > In v3, when I was backing up on the same server, I eliminated an
> > > "unncessary" extra ssh by substituting 'sudo' for 'ssh' using:
> > > $Conf{RsyncClientCmd} = '/usr/bin/sudo $rsyncPath $argList+';
> > >
> > > Not sure how to do this in v4 where one doesn't have access to
> > > RsyncClientCmd but instead can only specify:
> > > RsyncClientPath
> > > RsyncSshArgs
> > > SshPath
> > > i.e., I don't see how to eliminate the use of ssh...
> > >
> >
> > To clarify, I am trying to generate the following resulting command:
> > /usr/bin/sudo /usr/bin/rsync --server --sender -slHogDtpAXrcxe.iLsf
> --iconv=UTF-8
> >
> > Rather than the ssh version, which would be more like:
> > /usr/bin/ssh -l root mymachine /usr/bin/sudo /usr/bin/rsync --server
> --sender -slHogDtpAXrcxe.iLsf --iconv=UTF-8
> > (where mymachine really just equals localhost)
> >
> > If I set:
> > SshPath=''
> > RsynClientPath ='/usr/bin/sudo /usr/bin/rsync'
> > RsyncSshArgs = ''
> > I would presumably get the following, close, but non-working commmand:
> > mymachine /usr/bin/sudo /usr/bin/rsync --server --sender
> -slHogDtpAXrcxe.iLsf --iconv=UTF-8
> >
> > I could presumably write a short shell script like:
> > #!/bin/bash
> > shift
> > exec $*
> >
> > Then set SshPath to the above script (with RsyncSshArgs = '').
> > But even if that would work, it seems klugey.
> >
> >
>
> Just noticed that there is a '-h <host>' switch to 'sudo', so the
> following works to allow rsync on the localhost without 'ssh'
>
> $Conf{RsyncClientPath} = '/usr/bin/rsync';
> $Conf{RsyncSshArgs} = ['-e', '/usr/bin/sudo -h'];
> $conf{SshPath} = '';
>
> The resulting command is of form:
> usr/bin/sudo -h <host> /usr/bin/rsync --server --sender
> -slHogDtpAXrcxe.iLsf --iconv=UTF-8
>
> Since 'host' is the localhost (by choice), adding the '-h <host>' switch to
> sudo doesn't do anything different...
> Still a bit klugey but at least it's simple...
>
>
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