combination of bash and cmd.exe causes fatal error when used under CYGWIN=tty

combination of bash and cmd.exe causes fatal error when used under CYGWIN=tty

[Len Giambrone]

Greetings.

If I set CYGWIN=tty, then cygwin programs die with 
*** fatal error - couldn't initialize fd 0 for /dev/ttyN

Example:

C:\cygwin\home\lgiambro>bash -c "cmd /c 'ls'"
      0 [main] ls 7440 C:\cygwin\bin\ls.exe: *** fatal error - couldn't initiali
ze fd 0 for /dev/tty7
      0 [main] ls 7440 C:\cygwin\bin\ls.exe: *** fatal error - couldn't initiali
ze fd 0 for /dev/tty7
Stack trace:
Frame     Function  Args
00283918  6102796B  (00283918, 00000000, 00000000, 00000000)
00283C08  6102796B  (6117EC60, 00008000, 00000000, 61180977)
00284C38  61004F1B  (611A82B0, 00000000, 61243B04, 00010000)
End of stack trace

Corinna had mentioned that she was aware of the problem and looking for the cause in
http://cygwin.com/ml/cygwin/2010-09/msg00237.html

Has any progress been made on this issue?  Does anyone know of a way to get around it?

-Len


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Re: combination of bash and cmd.exe causes fatal error when used under CYGWIN=tty

[Christopher Faylor]

On Mon, Apr 25, 2011 at 10:08:05AM -0400, Len Giambrone wrote:
>Greetings.
>
>If I set CYGWIN=tty, then cygwin programs die with 
>*** fatal error - couldn't initialize fd 0 for /dev/ttyN
>
>Example:
>
>C:\cygwin\home\lgiambro>bash -c "cmd /c 'ls'"
>????? 0 [main] ls 7440 C:\cygwin\bin\ls.exe: *** fatal error - couldn't initiali
>ze fd 0 for /dev/tty7
>????? 0 [main] ls 7440 C:\cygwin\bin\ls.exe: *** fatal error - couldn't initiali
>ze fd 0 for /dev/tty7
>Stack trace:
>Frame???? Function? Args
>00283918? 6102796B? (00283918, 00000000, 00000000, 00000000)
>00283C08? 6102796B? (6117EC60, 00008000, 00000000, 61180977)
>00284C38? 61004F1B? (611A82B0, 00000000, 61243B04, 00010000)
>End of stack trace
>
>Corinna had mentioned that she was aware of the problem and looking for the cause in
>http://cygwin.com/ml/cygwin/2010-09/msg00237.html
>
>Has any progress been made on this issue??  Does anyone know of a way
>to get around it?

This problem will eventually go away when Cygwin 1.7.10 is released and
CYGWIN=tty goes away.  If this is still a problem in mintty or some
other terminal emulator then we'll look into it.

cgf

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