sshd prints the motd with -t option

[mouring at etoh.eviladmin.org]

Using their examples I can not replicate this using the current CVS tree.

- Ben

On Wed, 27 Dec 2000, Christian Kurz wrote:

> Hi,
> 
> and another interesting bug report, where I'm not sure what the correct
> behaviour of openssh should be. Thanks for your comments:
> 
> > I find myself frequently using OpenSSH to log in and perform a single
> > command (particularly in a script to perform some quick, simple task on
> > multiple machines I administer).  If the '-t' option is not included, the
> > behavior is no different than with the non-OpenSSH ssh inplementation.
> > However, this causes problems when I need to enter a password for, say,
> > sudo; the password is echoed back to the screen and the command fails.  If
> > instead I enter 'ssh -t user at host command', sudo and others will work
> > properly, but the motd is printed as well.  This adds significantly to the
> > output to be human-parsed and makes it more difficult to discern what
> > output came from which machine, as well as being different from the
> > original ssh and ssh2 implementations.  Here is some sample output; first,
> > an example of performing a command on a host running the original ssh
> > implementation:
> 
> |bj at host01:~$ ssh host00 ls /
> |Warning: Server lies about size of server host key: actual size is 1023
> |bits vs.
> | announced 1024.
> |Warning: This may be due to an old implementation of ssh.
> |bj at host00.do.main's password:
> |bin
> |boot
> |cdrom
> |dev
> |etc
> |floppy
> |home
> |initrd
> |lib
> |lost+found
> |mnt
> |proc
> |root
> |sbin
> |tmp
> |usr
> |var
> |vmlinuz
> |vmlinuz.old
> |bj at host01:~$ ssh -t host00 ls /
> |Warning: Server lies about size of server host key: actual size is 1023
> |bits vs. announced 1024.
> |Warning: This may be due to an old implementation of ssh.
> |bj at host00.do.main's password:
> |bin          etc          lib          root         var
> |boot         floppy       lost+found   sbin         vmlinuz
> |cdrom        home         mnt          tmp          vmlinuz.old
> |dev          initrd       proc         usr
> |Connection to host00.do.main closed.
> |bj at host01:~$
> 
> |Next, connecting to a host running OpenSSH's sshd:
> |bj at host00:~$ ssh host01 ls /
> |bj at host01's password:
> |bin
> |boot
> |cdrom
> |dev
> |etc
> |floppy
> |home
> |home.delete
> |initrd
> |lib
> |lost+found
> |mnt
> |proc
> |root
> |sbin
> |storage
> |tmp
> |usr
> |var
> |vmlinuz
> |vmlinuz.old
> |bj at host00:~$ ssh -t host01 ls /
> |bj at host01's password:
> |Last login: Sat Aug 12 18:20:18 2000 from some.host.do.main on pts/1
> |Linux host01 2.2.5 #2 Wed May 24 19:31:11 EDT 2000 i686 unknown
>  
> |Most of the programs included with the Debian GNU/Linux system are
> |freely redistributable; the exact distribution terms for each program
> |are described in the individual files in /usr/doc/*/copyright
>  
> |Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> |permitted by applicable law.
> |You have new mail.
> |bin    dev     home         lib         proc  storage  var
> |boot   etc     home.delete  lost+found  root  tmp      vmlinuz
> |cdrom  floppy  initrd       mnt         sbin  usr      vmlinuz.old
> |Connection to host01 closed.
> |bj at host00:~$
> 
> |host00 is a slink system running the older implementation of ssh, and
> |host01 is a potato system running OpenSSH.
> 
> |I would like to suggest that OpenSSH be modified to suppress printing the
> |motd if the -t option is used and it is a non-login session, ie, the
> |connection is opened for command processing only.
> 
> |bj at host00:~$ grep PrintMotd /etc/ssh/sshd_config
> |PrintMotd yes
> 
> |bj at host01:~$ grep PrintMotd /etc/ssh/sshd_config
> |PrintMotd no
> 
> Ciao
>      Christian
>