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Re: error while running shell in emacs

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 indeed
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 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*

(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


Problem reports:
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