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

[Da Zheng]

Thomas Bushnell BSG wrote:
> On Wed, 2008-08-27 at 01:57 +0200, Da Zheng wrote:
>   
> > I'm trying to make subhurd work without root's permission, so the first 
> > task for me is to find the operations need the privilege.
> >     
>
> That's a worthy task.
>
>   
> > I have a problem in store_parsed_open().
> > I believe store_parse_open() calls dev_open() if the filesystem of 
> > subhurd is in a disk.
> > The first privilege operation I can find is get_privileged_port() when I 
> > look into the code of libstore.
> >     
>
> That's right.  To make your project succeed, you'll need to implement a
> device master port far more fully than the existing subhurd boot does.
>
>   
> > I wrote a proc proxy, so I can track what RPC routines in process.defs 
> > are called (but the main purpose of the proc proxy is to give a program 
> > the master device port).
> > When I tried to run the subhurd with the normal user, I got the 
> > "Permission denied" error when store_parse_open() is called but I didn't 
> > see proc_getprivports() was called in the proc proxy.
> > I wonder where is the privilege operation?
> >     
>
> I'm having trouble understanding exactly what you were expecting or
> where this error was coming from.
>   
It's impossible for me to find all privilege operations by reading the 
code, so I try to run subhurd with the normal user and see where the 
error comes from.
> 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.

Zheng Da