https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223151
--- Comment #2 from Yuri Pankov <yur...@gmx.com> ---
Originally, it was a request on IRC asking how to *programmatically* find the
original name of renamed interface as some tunneling software wanted the tun
device, not the newly named interface.
I understand that it's not a usual use case, but in any case seemed helpful
enough to implement (I didn't find any other way) -- if it isn't or there are
smarter/easier ways to find the original name, feel free to reject this.
The output now looks like the following (with devname listed only for renamed
interface):
# ifconfig tun0 create name foo
foo
# ifconfig
vmx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
ether 00:50:56:00:00:34
inet6 fe80::250:56ff:fe00:34%vmx0 prefixlen 64 scopeid 0x1
inet 192.168.1.34 netmask 0xffffff00 broadcast 192.168.1.255
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
media: Ethernet autoselect
status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
inet 127.0.0.1 netmask 0xff000000
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
groups: lo
foo: flags=8010<POINTOPOINT,MULTICAST> metric 0 mtu 1500
devname: tun0
options=80000<LINKSTATE>
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
groups: tun
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