"Inappropriate ioctl for device" problem using latest cygwin as a shell within native (non-cygwin) GnuEmac

[Ken Brown]

On 3/11/2012 3:42 PM, Ken Brown wrote:
> On 3/11/2012 3:19 PM, Jack Profit wrote:
>> After upgrading my cygwin environment this morning to version
>> 1.7.11-1, I am no longer able to use cygwin bash as a shell within
>> native GnuEmacs (Windows).
>>
>> When I invoke M-x shell, I now get the following output in the shell
>> window:
>>
>> bash: cannot set terminal process group (-1): Inappropriate ioctl for
>> device
>> bash: no job control in this shell
>> $
>>
>> The shell window is functional, but as the error message suggests, I
>> have no Ctrl-C, Ctrl-Z or other job control functions.
>>
>> Here are my shell related .emacs settings:
>> (setq explicit-shell-file-name "c:/cygwin/bin/bash.exe")
>>
>> I am using:
>> GnuEmacs version 23.4.1 (latest)
>> Bash version 4.1.10-4
>> also Bash version 3.2.51-24 (removes error message, but job control
>> still doesn't work)
>>
>> I also tried the cygwin1.dll from the 3/10 snapshot and saw no
>> difference in behavior.
>
> I doubt if the Cygwin developers are going to be able to track this down
> unless you can find a way to reproduce the problem without using native
> emacs. Can you look into the emacs source for the native build and see
> how it is creating the bash process? Maybe you can extract a simple test
> case from it.

Another (easier) thing you could do is try various snapshots between 
versions 1.7.10 and 1.7.11 of cygwin1.dll and pinpoint exactly when the 
problem first occurred.

Ken


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