sshd and /usr/bin/zsh

[Brad King]

Igor Pechtchanski wrote:
> On Thu, 28 Apr 2005, Brad King wrote:
>>I just upgraded cygwin and now I cannot login to the machine via ssh
>>unless I change /etc/passwd to use /bin/bash for my shell.  If I use
>>/usr/bin/zsh then the login appears successful but no prompt ever shows
>>up.
> First off, it's always a good idea to read and follow
> <http://cygwin.com/problems.html>.  Without the information requested
> there, we don't know much about your system.

Oops, sorry.  My eyes scrolled through the left column of the web page
and found "FAQ".  When the problem was not in the FAQ I went back and
scrolled up and found "Mailing Lists" before noticing the "Reporting
Problems" link.  I suggest you add a link to
http://cygwin.com/problems.html from http://cygwin.com/lists.html in the
description of when posting to the main cygwin list is okay.

Anyway, I've attached the cygcheck.out this time.  Thanks for responding 
without it.

> One immediate thing to check is whether the /usr/bin mount is correct on
> your system: try changing your shell to /bin/zsh instead (/bin and
> /usr/bin should point to the same directory on Cygwin).  If that works,
> fix your mounts.

Here is the important part of the mount output:

C:\cygwin\bin on /usr/bin type system (textmode)
C:\cygwin on / type system (textmode)

Clearly /bin and /usr/bin both go to c:/cygwin/bin.

> Otherwise, since bash works for you, I suspect some sort of a permission
> issue.  Check the sshd logs.

The /var/log/sshd.log file is completely empty.  Actively tailing it 
during the login attempt still shows nothing.

 > Also, try opening a "system-owned shell"
> (Google for it to see how), and from there run
> 
> login youruser

That works when the shell is /bin/bash.  When I switch to /bin/zsh or 
/usr/bin/zsh, I get:

Last login: Thu Apr 28 14:43:26 on console

and then the same hang behavior as with ssh.

> To follow up on my hunch, you might want to run "cygcheck /usr/bin/zsh"
> and check the permissions on all the DLLs listed by that command.

Running the cygcheck /usr/bin/zsh.exe from the system shell or a user 
shell gives

C:/cygwin/bin/zsh.exe
   C:/cygwin/bin\cygwin1.dll
     C:\WINDOWS\system32\ADVAPI32.DLL
       C:\WINDOWS\system32\ntdll.dll
       C:\WINDOWS\system32\KERNEL32.dll
       C:\WINDOWS\system32\RPCRT4.dll
   C:/cygwin/bin\libzsh-4.2.4.dll
     C:/cygwin/bin\cygncurses-8.dll
     C:/cygwin/bin\cygiconv-2.dll

It should be noted that I can run zsh once I have a bash prompt.
Running zsh inside an rxvt works also.  It is only when the initial 
login uses zsh (through ssh or system shell login) that it fails.

-Brad
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