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Subject: [Bug 219746] Renaming (ifconfig(8)) tap(4) misses its character
 special device name
Date: Sat, 03 Jun 2017 06:17:51 +0000
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X-Bugzilla-Component: bin
X-Bugzilla-Version: 11.0-STABLE
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X-Bugzilla-Severity: Affects Some People
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219746

            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@FreeBSD.org
          Reporter: bugzilla.freebsd@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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