[Bug 1213] ssh-keyscan exits in mid-way

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1213

--- Comment #48 from Daniel Richard G. <skunk at iSKUNK.ORG> ---
(In reply to Damien Miller from comment #47)
> 
> There might be a few cases that we've missed, but please give
> -current a spin and let us know if it has fixed all keyscan crashes
> that you were seeing previously (I think it should...)

Hi Damien, thank you for following this up.

I gave the latest snapshot a try, and observed the following:

    [...]
    # A.B.C.D SSH-2.0-OpenSSH_5.6
    # A.B.C.D SSH-2.0-OpenSSH_5.6
    # A.B.C.D SSH-2.0-OpenSSH_5.6
    # X.Y.Z.W SSH-2.0-mpSSH_0.2.1
    getaddrinfo blarg.internal.example.com: Name or service not known

    $ host blarg.internal.example.com
    Host blarg.internal.example.com not found: 3(NXDOMAIN)

The program errors out if there is an invalid DNS name in the input.
This is arguably an exceptional case, but it would be much more
convenient for my usage if it gave a non-fatal warning and kept on
going.

(I'm still getting my list of hosts via AXFR, and while that *should*
in theory be a list of valid names, the one at issue appears to be a
dangling CNAME.)

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