On Sun, Jan 18, 2015 at 10:28:32PM +0100, Jan Engelhardt wrote:
> On Sunday 2015-01-18 22:13, Pablo Neira Ayuso wrote:
>
> >This patch introduces a semaphore
> >index b18022e..80eed2c 100644
> >--- a/iptables/xshared.c
> >+++ b/iptables/xshared.c
> >+static int xtables_check_owner(int semid)
> >+{
> >+ int ret;
> >+ struct semid_ds ds;
> >+
> >+ ret = semctl(semid, 0, IPC_STAT, &ds);
>
> Is there a particular reason you are not using the POSIX semaphores?
> [sem_open/shm_open as per sem_overview(7)].
Please, read the patch description:
"This patch introduces a semaphore that is identified by the path to
the iptables binary, it also relies on SEM_UNDO so the kernel performs
the up() operation at process exit to avoid races with signals. This
also avoids file locks that require a writable filesystem."
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
