Re: What to use in place of abstract unix sockets?

13.12.2021 21:24, Gleb Popov wrote:

> On Sat, Dec 11, 2021 at 8:02 PM Alan Somers <asomers@freebsd.org> wrote:
> 
>> Since socketpair() doesn't work in this case, why not just use a UDP
>> socket bound to 127.0.0.1 ?
>>
> 
> This would introduce a bit of overhead as the packet would pass through the
> IP stack. Another problem is that the current code uses SOCK_STREAM socket
> type, which isn't supported by the UDP protocol. Maybe this would work with
> SCTP?
> Anyways, I'm going to try this only as a last resort.
> 
> OK, so far my options are:
> 1. Mount the directory containing UDS into chroot with nullfs.
> 2. Use PF_INET.
> 3. Do kernel-hacking and implement abstract sockets (as well as
> remount-to-readonly support for nullfs).
> 
> I'd go straight to #3 but with my skills/free time this would take a lot of
> time, so I'm going to try hacking it around with #1 and #2.
> 
> Thanks everyone for all the suggestions.

Is'nt hacking "the client" to open AF_UNIX socket before chroot() an option?