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Re: error while running shell in emacs

On 10/4/2011 2:56 AM, Markus Hoenicka wrote:

Ken Brown <> was heard to say:

On 10/2/2011 5:56 PM, Ken Brown wrote:
On 10/2/2011 5:35 PM, Ken Brown wrote:
On 9/30/2011 3:04 PM, Ken Brown wrote:
On 9/30/2011 10:27 AM, Markus Hoenicka wrote:

after moving to a new position I have set up a fresh Cygwin

CYGWIN_NT-5.1 sbhc123 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin

I use some Emacs extensions which execute external programs using
(call-process). This used to work on my previous setup, but it
fails on
my current box. The following command run in Emacs reproduces what
to be the problem:

(call-process "bash" nil '(t t) nil "-ic" "ls -al")
bash: Kann die Prozessgruppe des Terminals nicht setzen (-1).:
Inappropriate ioctl for device
bash: Keine Job Steuerung in dieser Shell.

As you can see, my Cygwin also started speaking German, but I didn't
round to fix that yet. The messages loosely translate to: "cannot set
terminal process group" and "no job control in this shell".

Is this an incorrect setup of either Cygwin or Emacs, or is this
a problem that crept into Cygwin recently?

I can reproduce this problem. It reminds me of a problem that I reported in ,

but that started with the 2011-05-05 snapshot and was fixed in the
2011-06-16 snapshot. The problem you're reporting exists in Cygwin
and persists in the latest snapshot, but with different symptoms:
Instead of printing error messages, emacs hangs and has to be killed.

If one of the Cygwin developers wants to look at this, here are the
steps to reproduce it:

1. Start emacs.
2. Type <Ctrl-x>b<Enter>

[This should put you in the *scratch* buffer.]

3. Type (or copy and paste) the following text into the *scratch*

(call-process "bash" nil '(t t) nil "-ic" "ls -al")

4. With the cursor positioned immediately after the closing
type <Ctrl-j>

FWIW, the change in behavior (i.e., emacs hanging instead of giving an error message) starts with the 2006-06-13 snapshot. And it may be

Ignore the statement that it starts with the 2006-06-13 snapshot. I made a mistake and didn't test enough snapshots. I'll have to continue bisecting. All I know at the moment is that there's an error message in the 2011-05-10 snapshot and that the "hang" occurs in the 2011-06-13 snapshot. There are still a lot of snapshots in between that need testing. Sorry for the noise.

I've finished testing snapshots. Up through the 2011-05-20 snapshot, I get the error messages reported by the OP:

bash: cannot set terminal process group (-1): Inappropriate ioctl for
bash: no job control in this shell

Starting with the 2011-05-28 snapshot, I instead get the message
"Aborted". Starting with the 2011-06-01 snapshot, I get the "hanging"
behavior that I reported previously (with a stopped bash process).

There was a similar pattern in the problem I reported in


Do you have any idea which Cygwin DLL version introduced the problem? I have never used snapshots, but as I can't access my previous box anymore I can't really tell which version it ran.

No, 1.7.9 is the earliest version I've tested. I'm inclined to wait and see if cgf or Corinna says it would be useful for us to test earlier versions.


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