Date: Wed, 28 Aug 2002 20:30:18 +0200 From: Pawel Jakub Dawidek <nick@garage.freebsd.pl> To: Terry Lambert <tlambert2@mindspring.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Replacing kernel functions. Message-ID: <20020828183018.GL31943@garage.freebsd.pl> In-Reply-To: <3D6CBC0B.A94B7197@mindspring.com> References: <20020828021016.GB31943@garage.freebsd.pl> <3D6C3F16.EC09BDB@mindspring.com> <20020828102902.GF31943@garage.freebsd.pl> <3D6CBC0B.A94B7197@mindspring.com>
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On Wed, Aug 28, 2002 at 05:03:23AM -0700, Terry Lambert wrote:
+> -- Terry
Thanks to Your help I've found maybe better way to do this.
I could catch open(), and:
int myopen(struct proc *p, struct open_args *uap)
{
int ret;
if ((ret =3D open(p, uap)) !=3D 0)
return (ret);
/*
* And here I can cache uap->name and change close() function address,
* where address of those functions is here:
* p->p_fd->fd_ofiles[p->p_retval[0]]->f_ops->fo_close
*/
return (0);
}
This is much more complicated, because if I will change address of this
function, it changes for every descriptor on this file system.
So I need cache original address of fo_close() functions, etc.
But this should works, I'm testing it at the moment.
--=20
Pawel Jakub Dawidek
UNIX Systems Administrator
http://garage.freebsd.pl
Am I Evil? Yes, I Am.
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