[Libvir] netcat "-U" option

[Daniel P. Berrange]

On Fri, Nov 23, 2007 at 01:50:47PM +0000, Richard W.M. Jones wrote:
> Debian ship a completely different version of netcat from Fedora.  Not 
> just a different version, but it appears to be a different codebase.
> 
> Debian's netcat doesn't support the (very useful) -U option, so this 
> code fails in src/remote_internal.c:
> 
>         cmd_argv[j++] = strdup (command);
> //.....
>         cmd_argv[j++] = strdup (server);
>         cmd_argv[j++] = strdup (netcat ? netcat : "nc");
>         cmd_argv[j++] = strdup ("-U");
>         cmd_argv[j++] = strdup (sockname ? sockname : 
> LIBVIRTD_PRIV_UNIX_SOCKET);
>         cmd_argv[j++] = 0;
> 
> As a result of this remote-over-ssh fails on Debian.  I'm not completely 
> sure how to solve this at the moment.  If anyone has any ideas ...

Since the remote system has to have the libvirt daemon installed already,
we could simply ship a mini 'nc' program of our own - libvirtd-cat ? The 
main problem with this would be getting dealing with back-compat. Should
the client try 'nc' first, or ty 'libvirtd-cat' first. Or we could see
if Debian netcat maintainer is interested in a patch to add '-U' support
to their version

Dan.
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