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Pseudo-terminal will not be allocated because stdin is not a terminal.

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	Pseudo-terminal will not be allocated because stdin is not a terminal. by peter360 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message I just installed cygwin/X. My system is: $ uname -a CYGWIN_NT-5.1 AGAINSTSTONE-LX 1.5.24(0.156/4/2) 2007-01-31 10:57 i686 Cygwin I start the X server using the included startxwin.bat file. In the xterm window this is what I got $ ssh destination.host Pseudo-terminal will not be allocated because stdin is not a terminal. ... ssh asks me for password but as I type the password echoes into the terminal window! I assume this is related to the warning message about not being able to allocate Pseudo terminal. But why? Why is my stdin not a terminal? Anybody has a clue? Thanks, Peter
	Re: Pseudo-terminal will not be allocated because stdin is not a terminal. by Christopher Faylor-8 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message On Thu, Feb 01, 2007 at 12:10:35PM -0800, peter360 wrote: >I just installed cygwin/X. My system is: > >$ uname -a >CYGWIN_NT-5.1 AGAINSTSTONE-LX 1.5.24(0.156/4/2) 2007-01-31 10:57 i686 Cygwin > > >I start the X server using the included startxwin.bat file. In the xterm >window this is what I got >$ ssh destination.host >Pseudo-terminal will not be allocated because stdin is not a terminal. >... > >ssh asks me for password but as I type the password echoes into the terminal >window! I assume this is related to the warning message about not being >able to allocate Pseudo terminal. But why? Why is my stdin not a terminal? >Anybody has a clue? Yep. You have a non-cygwin tool in there somewhere (ssh, maybe?) which doesn't understand cygwin's ptys. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
	Re: Pseudo-terminal will not be allocated because stdin is not a terminal. by peter360 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Indeed! It turns out I was using c:\WINDOWS\System32\ssh.exe, which I have no idea how it got there... I installed openssh and the problem was fixed. Thanks! Just out of curiosity, how does a program check if stdin is a "terminal"? My xterm looks like a terminal to me but apparently the windows version of ssh.exe couldn't figure that out... Peter Christopher Faylor-8 wrote: On Thu, Feb 01, 2007 at 12:10:35PM -0800, peter360 wrote: >I just installed cygwin/X. My system is: > >$ uname -a >CYGWIN_NT-5.1 AGAINSTSTONE-LX 1.5.24(0.156/4/2) 2007-01-31 10:57 i686 Cygwin > > >I start the X server using the included startxwin.bat file. In the xterm >window this is what I got >$ ssh destination.host >Pseudo-terminal will not be allocated because stdin is not a terminal. >... > >ssh asks me for password but as I type the password echoes into the terminal >window! I assume this is related to the warning message about not being >able to allocate Pseudo terminal. But why? Why is my stdin not a terminal? >Anybody has a clue? Yep. You have a non-cygwin tool in there somewhere (ssh, maybe?) which doesn't understand cygwin's ptys. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
	Re: Pseudo-terminal will not be allocated because stdin is not a terminal. by Christopher Faylor-8 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message On Thu, Feb 01, 2007 at 04:42:59PM -0800, peter360 wrote: >Indeed! It turns out I was using c:\WINDOWS\System32\ssh.exe, which I have >no idea how it got there... I installed openssh and the problem was fixed. >Thanks! > >Just out of curiosity, how does a program check if stdin is a "terminal"? >My xterm looks like a terminal to me but apparently the windows version of >ssh.exe couldn't figure that out... Windows doesn't know what a "terminal" is. Cygwin invents its own concept but only Cygwin programs are aware of this. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
	Re: Pseudo-terminal will not be allocated because stdin is not a terminal. by Mark J. Reed-2 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message In the POSIX API there is a function that takes a file descriptor and returns true if that descriptor is associated with a "terminal", false otherwise. The effective definition of "terminal" is therefore "something that causes that function to return true". :) Xterms running under Cygwin are designed to do whatever it is that makes the Cygwin version of the function return true, but non-Cygwin programs have their own idea (perhaps based on a Windows POSIX layer version of the same function, perhaps not), and apparently Cygwin/xterm doesn't pass muster. More than likely the only thing that looks like a "terminal" to the Windows ssh client is a command prompt console window (do they still call those "DOS boxes"?). On 2/1/07, Christopher Faylor <cgf-use-the-mailinglist-please@...> wrote: > On Thu, Feb 01, 2007 at 04:42:59PM -0800, peter360 wrote: > >Indeed! It turns out I was using c:\WINDOWS\System32\ssh.exe, which I have > >no idea how it got there... I installed openssh and the problem was fixed. > >Thanks! > > > >Just out of curiosity, how does a program check if stdin is a "terminal"? > >My xterm looks like a terminal to me but apparently the windows version of > >ssh.exe couldn't figure that out... > > Windows doesn't know what a "terminal" is. Cygwin invents its own concept > but only Cygwin programs are aware of this. > > -- > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > Problem reports: http://cygwin.com/problems.html > Documentation: http://x.cygwin.com/docs/ > FAQ: http://x.cygwin.com/docs/faq/ > > -- Mark J. Reed <markjreed@...> -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://x.cygwin.com/docs/ FAQ: http://x.cygwin.com/docs/faq/
	Re: Pseudo-terminal will not be allocated because stdin is not a terminal. by peter360 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message That must be it. Thanks for the explanation Mark.