Add IPv6 support to /etc/rc.d/netwait

[dudleyi_yahoo.com]

Summary

According to bug 195502, netwait does not work with IPv6.

[gbe]

Add reviewers that have worked on that script

[bz]

Can you upload it with arc or diff -U99999 to have full context?

[bz]

I've only moved that script last 8 years or so ago. Adding appropriate groups for reviewers.
If we do this one defaultroute would also be another good script to make aware of IPv6.

[jlduran]

Also one could just use ping -4 and ping -6 without checking first if the IP is valid v4 or v6. As we are only interested when the exit status is successful?

libexec/rc/rc.d/netwait

91

I would pedantically use ping -4 here.

92

We might want to add a \. to the grep pattern, in order to also match IPv4-Embedded IPv6 addresses.

[jlduran]

Actually, have you tried the script on a currently supported version of FreeBSD? It should work without any modifications. The bug was reported before the unification of ping6 with ping (D21377).

[dudleyi_yahoo.com]

You're right. It works on current version of FreeBSD. This was sparked by someone trying to use `netwait` inside of a jail, which it is not initially designed for.