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

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Thu Mar 3 15:02:12 EST 2011


--- Comment #22 from Daniel Richard G. <skunk at iSKUNK.ORG> 2011-03-03 15:02:12 EST ---
(In reply to comment #21)
> Hmmm, but the patch doesn't have two consecutive lines with ".orig" as
> you describe above.  From observation, the first three lines for each
> modified file are similar to
> diff -u openssh-5.8p1/kex.c.orig openssh-5.8p1/kex.c
> --- openssh-5.8p1/kex.c.orig    2010-09-24 08:11:14.000000000 -0400
> +++ openssh-5.8p1/kex.c    2011-02-11 18:14:03.396688000 -0500

Um. Are we looking at the same file? Here are the first three lines of
your most recent patch (attachment 2008, in comment #19):

--- openssh-5.8p1/kex.c.orig    2010-09-24 08:11:14.000000000 -0400
+++ openssh-5.8p1/kex.c.orig    2011-02-11 18:14:03.396688000 -0500
@@ -49,6 +49,7 @@ 

> Are you using the GNU patch?  The attached patch text works for me with
> no changes whatsoever.  Or to ask it somewhat differently, does your
> `patch' process WRONG even though the text is actually CORRECT?  Is it
> possible that your`patch' is not ignoring the "diff" line?

This is on an Ubuntu Linux system:

host:/tmp/openssh-5.8p1$ patch -p1 --dry-run <aab-2008.patch 
patching file kex.c.orig
Hunk #1 FAILED at 49.
Hunk #2 FAILED at 367.
2 out of 2 hunks FAILED -- saving rejects to file kex.c.orig.rej
patching file packet.c.orig
Hunk #1 FAILED at 1025.
Hunk #2 FAILED at 1035.
Hunk #3 FAILED at 1100.
3 out of 3 hunks FAILED -- saving rejects to file packet.c.orig.rej

If I edit each "+++" line in the patch, it applies cleanly.

> I submit hosts, one per line, as the data to ssh-keyscan and am not
> familiar with the "alias" format.  In fact, your comments clarified it
> somewhat for me.  If you meant that "" was seen in stderr and
> the others weren't, I believe that this is the "correct" behavior if
> ssh-keyscan had success with "".  I think the code tells me
> that it stops looking after the first IP/host with which it has
> success.

Okay, that seems reasonable. (Yes, I only saw and not the
other two.)

The sample "Input format" line in the ssh-keyscan man page has two IP
addresses in the first column, though the semantics of this are left
unexplained. My assumption is that it's meant for hosts with
round-robined DNS names, where the SSH server at each address uses the
same host keys. (Which would be consistent with what you describe.)

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