Jérôme Duval <korli@xxxxxxxxxxxxxxxx> wrote: > 2009/12/12 Axel Dörfler <axeld@xxxxxxxxxxxxxxxx>: > > Why even bother to test if it exists before? > Sure, we can let the network stack fail on a non configured > interface. > I was trying to avoid this case, not needed though. If you really wanted to do that, you could also just check if the interface exists: ifreq request; strlcpy(request.ifr_name, name, IF_NAMESIZE); if (ioctl(socket.FD(), SIOCGIFINDEX, &request, sizeof(struct ifreq)) < 0) return 0; In any case, just deleting a possibly non existing interface is much cheaper than having to copy the interface list to userland, and then searching for that interface in that list; since there is a big race condition between retrieving the list and deleting the interface, you can't even know if not someone else removed that interface in the mean time. Bye, Axel.