openssh unix dev - Jan 2014 - For the default of CanonicalizeFallbackLocal

Hi,

The default value for the option CanonicalizeFallbackLocal.

In the manual, The default value "no".

     CanonicalizeFallbackLocal
             Specifies whether to fail with an error when hostname canonical-
             ization fails.  The default, ?no?, will attempt to look up the
             unqualified hostname using the system resolver?s search rules.  A
             value of ?yes? will cause ssh(1) to fail instantly if
             CanonicalizeHostname is enabled and the target hostname cannot be
             found in any of the domains specified by CanonicalDomains.

but, I think in the "yes".
In the source code...

1476 initialize_options(Options * options)
1477 {
1561   options->canonicalize_fallback_local = -1;
1563 }

1571 fill_default_options(Options * options)
1572 {
1720   if (options->canonicalize_fallback_local == -1)
1721     options->canonicalize_fallback_local = 1;
1738 }

try,

"myserver" can name resolution but,
"myserver.localdomain.local" can not.

  <.ssh/config>
  CanonicalizeHostname yes
  CanonicalDomains localdomain.local
  CanonicalizeFallbackLocal no

  $ ssh root at myserver
  ssh: Could not resolve host "myserver"

Not connected.

  <.ssh/config>
  CanonicalizeHostname yes
  CanonicalDomains localdomain.local
  #CanonicalizeFallbackLocal no <- comment out

  $ ssh root at myserver
  Last login: Sun Jan 19 02:51:12 2014 from 192.168.x.x
  root at myserver:~$

Connected.

When the settings have not been, I fall back.
This is the behavior when it is set to "yes".

Thanks.

On Sun, 19 Jan 2014, togakushi wrote:
> Hi,
> 
> The default value for the option CanonicalizeFallbackLocal.
> 
> In the manual, The default value "no".
> 
>      CanonicalizeFallbackLocal
>              Specifies whether to fail with an error when hostname
canonical-
>              ization fails.  The default, ?no?, will attempt to look up the
>              unqualified hostname using the system resolver?s search rules.
A
>              value of ?yes? will cause ssh(1) to fail instantly if
>              CanonicalizeHostname is enabled and the target hostname cannot
be
>              found in any of the domains specified by CanonicalDomains.
> 
> but, I think in the "yes".
> In the source code...
Thanks - the manpage is wrong:

Index: ssh_config.5
==================================================================RCS file:
/cvs/src/usr.bin/ssh/ssh_config.5,v
retrieving revision 1.183
diff -u -p -r1.183 ssh_config.5
--- ssh_config.5	7 Dec 2013 11:58:46 -0000	1.183
+++ ssh_config.5	19 Jan 2014 04:46:57 -0000
@@ -229,11 +229,11 @@ search for the specified destination hos
 .It Cm CanonicalizeFallbackLocal
 Specifies whether to fail with an error when hostname canonicalization fails.
 The default,
-.Dq no ,
+.Dq yes ,
 will attempt to look up the unqualified hostname using the system
resolver's
 search rules.
 A value of
-.Dq yes
+.Dq no
 will cause
 .Xr ssh 1
 to fail instantly if