[Bug 219746] Renaming (ifconfig(8)) tap(4) misses its character special device name

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219746

            Bug ID: 219746
           Summary: Renaming (ifconfig(8)) tap(4) misses its character
                    special device name
           Product: Base System
           Version: 11.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: bugzilla.freebsd at omnilan.de

Not sure if it's kern/ or bin/, both are involved I guess.

Renaming vmnet/tap(4) interfaces, defined in rc.conf(5) via
"cloned_interfaces" e.g, isn't prohibited by rc(8)-network.subr nor by
ifconfig(8).
If such a interface is renamed, the Ethernet device shows up correctly,
with the new name and ifconfig(8) also reports the new name if it's
created and renamed in the same invocation.
Problem is, the control device isn't renamed, it will keep it's initial
creation name like tap0 and I found no userland way to determine the
corresponding Ethernet IF name.

-harry

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