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SubjectRe: [PATCH] Smackv10: Smack rules grammar + their stateful parser
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On Sun, Nov 04, 2007 at 12:28:48PM +0000, Pavel Machek wrote:
> Hi!
> > > Still to come:
> > >
> > > - Final cleanup of smack_load_write and smack_cipso_write.
> >
> > Hi All,
> >
> > After agreeing with Casey on the "load" input grammar yesterday, here's
> > the final grammar and its parser (which needs more testing):
> >
> > A Smack Rule in an "egrep" format is:
> >
> > "^[:space:]*Subject[:space:]+Object[:space:]+[rwxaRWXA-]+[:space:]*\n"
> >
> > where Subject/Object strings are in the form:
> >
> > "^[^/[:space:][:cntrl:]]{1,SMK_MAXLEN}$"
>
> Can we avoid string parsers in the kernel?
>

Ok, Could someone suggest a better idea please ?.

I thought about packing the rules in a structure and sending
it over an ioctl() command. Is this applicable ?

>
> > +static inline int isblank(char c)
> > +{
> > + return (c == ' ' || c == '\t');
> > +}
>
> This sounds like enough for 'NAK'.
>
> Pavel,
> who still thinks smack rules should be parsed
> in userspace and compiled into selinux rules...
>
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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