Re: [PATCH] New function (libfshelp) fshelp_cancontrol

[Neal H Walfield]

> I'd like to have this same single checking function used for all the
> control-the-world permission checks.  This includes all the "isroot"
> settings used in trivfs and term and so forth, and also the more detailed
> checks in things like chown.  In keeping with fshelp_isowner, it might be
> natural to call this fshelp_isroot instead of cancontrol.  The code in
> e.g. diskfs_S_file_chown would look like this:

Is that question really is the user root?  It seems misleading to me.

> I don't think it much matters which of these criteria we use.  
> 
> If pfinet's style is preferable, then it should at least consistently track
> the st_uid/st_gid of the underlying node if it passes through changes (as
> trivfs filesystems usually do).  Thus the interface in my example code
> above, where fshelp_isroot takes a struct stat containing the last stored
> state of the underlying node.

I think we should use both:  if you have an id of the translator, you can
send it signals et al., therefore, you should be able to change its
options etc; if you own a file, you can control its ``contents''
therefore you should be able to control the translator.

If you agree to this usage, I think it eliminates the use of this function
helping with chown?

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