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To: Bruce Evans <bde@zeta.org.au>
cc: current@freebsd.org
Subject: Re: 2.2-960323-SNAP: ibcs2 panic 
In-reply-to: Your message of "Thu, 28 Mar 1996 15:32:34 +1100."
             <199603280432.PAA09588@godzilla.zeta.org.au> 
Date: Wed, 27 Mar 1996 21:58:18 -0800
From: Steven Wallace <swallace@ece.uci.edu>
Sender: owner-current@freebsd.org
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>>Make sure your /compat/ibcs2/dev directory looks like:
> 
>>lrwxr-xr-x  1 root  wheel         9 Oct 15 22:20 X0R@ -> /dev/null
>>lrwxr-xr-x  1 root  wheel         7 Oct 15 22:20 nfsd@ -> socksys
>>-rw-rw-r--  1 root  wheel         0 Mar 27 10:44 null
>>lrwxr-xr-x  1 root  wheel         9 Oct 15 22:20 socksys@ -> /dev/null
>>crw-rw-rw-  1 root  wheel   41,   1 Oct 15 22:14 spx
> 
> I think spx will have to be a link to /dev/spx for devfs.  spx isnt in
> devfs or /sys/i386/conf/majors.i386.
> 

As I explained when I wrote the spx "support" it is truely a hack.
Look at the code:

#ifdef SPX_HACK
        if(ret == ENXIO)
                if(!strcmp(SCARG(uap, path), "/compat/ibcs2/dev/spx"))
                        ret = spx_open(p, uap, retval);
        else
#endif /* SPX_HACK */

It doesn't matter what device it opens, just as long as it doesn't exist.
Then it returns ENXIO so it checks the path.  This is for speed so
not all opens check the path.  Since the old socksys support was deprecated,
the old spx device that no longer exists is a good choice for this hack!

Steven