Re: What operations in store_parsed_open() need the privilege?

[Da Zheng]

Thomas Bushnell BSG wrote:
> On Wed, 2008-08-27 at 03:48 +0200, Da Zheng wrote:
>   
> > > It sounds as if you got EPERM from store_parse_open, but
> > > proc_getprivports is not being called, so you are having trouble
> > > understanding why you got an error message at all.
> > >   
> > >       
> > Yes, exactly.
> >     
> > > This will depend much on what the store specification was which was
> > > passed to store_parse_open.  Can you provide more details?
> > >   
> > >       
> > I run subhurd with "boot servers.boot /dev/hd1", so the libstore should 
> > read the disk.
> >     
>
> I believe it fails inside boot's main() function when boot attempts a
> store_parsed_open on /dev/hd1.  Why would you expect your proc server to
> have anything to do with that?
>   

I know boot fails and gets EPERM when it calls store_parsed_open, but I 
need to know what operations inside store_parsed_open() fail. Otherwise, 
I don't know how to fix it.

I looked into the code of libstore again and inserted some debugging 
print in libstore (I did it before, but I forgot to set LD_LIBRARY_PATH 
so boot can link to the modified libstore.so when I ran subhurd. I was 
so stupid).

I find the problem now.
When I run "boot servers.boot /dev/hd1", the store_class is actually 
store_query_class, and store_open() is called to open "/dev/hd1". So the 
error EPERM is actually returned by file_name_lookup() in store_open(). 
I always thought dev_open() would be called. No wonder that I didn't see 
proc_getprivports() was called.

Zheng Da