On Tuesday 14 November 2006 22:22, suzuki wrote:
> Does the following change look fine ?
>
> do_msgsnd() - Accepting the mtype and user space ptr to the mtext. i.e.,
>
> long do_msgsnd(int msqid, long mtype, void __user *mtext,
> size_t msgsz, int msgflg);
> and,
>
> do_msgrcv() - accepting the kernel space data ptr to pmtype and user
> space ptr to mtext. The caller has to copy the *pmtype back to the user
> space.
>
> i.e.,
>
> long do_msgrcv(int msqid, long *pmtype, void __user *mtext,
> size_t msgsz, long msgtyp, int msgflg);
Yes, that looks fine.
> Can we use the kernel space "struct msgbuf" instead of the mtype being
> passed explicitly.
That works as well, although it may be a little confusing to have
the extra mtext byte of that structure included there, so I'd prefer
the first solution.
Arnd <><
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