On Thu, 25 Mar 2010, Jan Engelhardt wrote:
> Hi,
>
>
> The following spatch would change the function signature of
> checkentry functions in Netfilter/Xtables from bool to int. However,
> spatch only considers singular "struct xt_match ops" and misses out
> on net/netfilter/xt_tcpudp.c's use of "struct xt_match ops[]". Is a
> different syntax needed in this case?
You can also declare a metavariable as:
struct xt_match[] ops;
Your rule1 actually matches the case where there is a pointer, and where
there is a top-level xt_match structure, due to the isomorphisms. You can
see this by giving the option -parse_cocci and the semantic patch file.
Unfortunately the array case doesn't seem to expand in this way. I'm
not sure if there is a general way to capture an array of structures.
julia
> // <smpl>
> @ rule1 @
> struct xt_match ops;
> identifier check;
> @@
> ops.checkentry = check;
>
> @@
> type bool;
> identifier rule1.check;
> @@
> -bool check
> +int check
> (...){...}
> // </smpl>
>
>
> thanks,
> Jan
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