K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2020-04-23T21:16:51.951099Z
K 7
svn:log
V 422
libc: Shortcut if_indextoname() if index == 0

If the index we're trying to convert is 0 we can avoid a potentially
expensive call to getifaddrs(). No interface has an ifindex of zero, so
we can handle this as an error: set the errno to ENXIO and return NULL.

Submitted by:	Nick Rogers
Reviewed by:	lutz at donnerhacke.de
MFC after:	2 weeks
Sponsored by:	RG Nets
Differential Revision:	https://reviews.freebsd.org/D24524

END