[PATCH] Add (incomplete) decoder for Video4Linux ioctls

[Dmitry V. Levin]

On Thu, Mar 06, 2014 at 11:51:02PM +0000, William Manley wrote:
> On 04/03/14 17:41, William Manley wrote:
> > +		case VIDIOC_TRY_FMT:
> > +		case VIDIOC_S_FMT:
> > +		{
> > +			/* TODO: work out how strace deals with inout arguments and
> > +			   implement */
> > +			return 0;
> > +		}
> 
> I'd quite like to implement this.  How should I go about displaying this
> given that it uses inout arguments?  e.g. printing the contents of the
> struct passed as an argument on both entering(tcp) and exiting(tcp)
> seems like a good idea but I'm worried that it will look confusing to
> the user.

There are few examples (e.g. decode_select) where syscall arguments used
by the kernel for input and output are decoded on both entering and
exiting.  On entering, decoded arguments are printed using tprintf; on
exiting, the output is saved to tcp->auxstr and RVAL_STR is returned.


-- 
ldv
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