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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:Hi,
after moving to a new position I have set up a fresh Cygwin installation:
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 seems 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 get 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 indeed a problem that crept into Cygwin recently?
I can reproduce this problem. It reminds me of a problem that I reported in
http://cygwin.com/ml/cygwin/2011-06/msg00174.html ,
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 1.7.9 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* buffer:
(call-process "bash" nil '(t t) nil "-ic" "ls -al")
4. With the cursor positioned immediately after the closing parenthesis, 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 device 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
http://cygwin.com/ml/cygwin/2011-06/msg00174.html
Ken
regards, Markus
-- Markus Hoenicka http://www.mhoenicka.de AQ score 38
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