On Tue, Apr 06, 2021 at 09:22:31AM -0700, Stephen Hemminger wrote: > On Tue, 6 Apr 2021 13:42:40 +0000 > Alyssa Ross <h...@alyssa.is> wrote: > > > If I do > > > > ip tuntap add name tap%d mode tap > > > > then a TAP device with a name like "tap0", "tap1", etc. will be created. > > But there's no way for me to find out which name was chosen for the > > device created by that command. > > Use a follow on ip link show or look in sysfs. > > > Perhaps ip should print the name of tuntap devices after they're > > created? > > You can already do that with followon command, or use batch to put two > commands together.
I don't think that's reliable, is it? What happens if I create one device, but by the time I do ip link show another one has been created? There's no way to know for sure that the last device was created by the command I ran. As I understand it, the only way to avoid a race like that for sure would be to look at the ifr_name returned by the kernel from TUNSETIFF.
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