No prompt!


 
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Operating Systems Solaris No prompt!
# 1  
Old 01-18-2010
No prompt!

We have a Solaris 10 machine.
Today a weird issue happened.

After login remotely via ssh, the motd appeared BUT
there was no prompt!

The prompt only appears after pressing Ctrl+d or Ctrl+c.
Strange behaviour.

I have checked /etc/profile and own user .profile, there is no anamoly.

When I typed who -u, the tty is displayed as syscon instead of pts/..

Can anyone explain this behaviour or provide a solution?

Thanks.
# 2  
Old 01-18-2010
Quote:
Originally Posted by sundar63
The prompt only appears after pressing Ctrl+d or Ctrl+c.
Strange behaviour.

I have checked /etc/profile and own user .profile, there is no anamoly.
Double check that. It looks like there is a process reading stdin from your description. What says, from another terminal:
Code:
ptree $(pgrep sshd)

# 3  
Old 01-18-2010
Here is the output,

Code:
$ for i in `pgrep sshd`
> do ptree $i
> done
8688 /usr/lib/ssh/sshd
 10546 /usr/lib/ssh/sshd
  10549 /usr/lib/ssh/sshd
   10551 -sh
    10563 ptree 10546
8688 /usr/lib/ssh/sshd
  10546 /usr/lib/ssh/sshd
   10549 /usr/lib/ssh/sshd
    10551 -sh
     10564 ptree 8688
8688 /usr/lib/ssh/sshd
   10546 /usr/lib/ssh/sshd
     10549 /usr/lib/ssh/sshd
      10551 -sh
        10565 ptree 10549
sunxxx 10551 10549   0 02:35:12 syscon      0:00 -sh
sunxxx 10569 10568   0 02:38:09 syscon      0:00 ps -ef
sunxxx 10549 10546   0 02:35:12 ?           0:00 /usr/lib/ssh/sshd
sunxxx 10568 10551   0 02:38:09 syscon      0:00 grep sunxxx

What is syscon?

When I start a duplicate session, it logs in perfectly. Smilie

What could be the issue?
# 4  
Old 01-19-2010
Is it the same case if you were to use a different UID to ssh?

Last edited by incredible; 01-19-2010 at 11:04 AM..
# 5  
Old 01-19-2010
Yes. It happens for all user ids.
# 6  
Old 01-19-2010
You can add "set -x" at the beginning of /etc/profile and see where the login scripts hangs.
# 7  
Old 01-19-2010
Thanks to jlliagre for the assistance.

I have inserted set -vx to debug.
And found it hangs at a script line which is executing grep.
The pattern is passed a value obtained from the command logname

Unfortunately logname doesn't return a value to the variable,
so it's stuck at the line grep $variable /file.

But why doesn't the command logname return a value?
I have executed in command prompt and there is no value at all!

How to use truss command to check logname execution?
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