Re: break signal on Mac OS X doesn't work

Re: break signal on Mac OS X doesn't work

[Barry Margolin]

In article <mailman.8535.1103860328.27204.help-gnu-emacs@gnu.org>,
 David Goodger <goodger@python.org> wrote:

> System identification: I'm running GNU Emacs 21.3.50.1 on Mac OS X
> 10.3.7.  It runs in a window that starts out saying "Terminal" in the
> title bar, before Emacs takes over.  My .emacs file contains this
> setup code:
> 
> ; shell mode
> (setq explicit-shell-file-name "bash")
> (setq explicit-bash-args '("--login" "--noediting" "-i"))
> (add-hook 'shell-mode-hook 'my-shell-mode-hook)
> (defun my-shell-mode-hook ()
>    "Customize shell-mode"
>    (define-key shell-mode-map "\C-cf" 'font-lock-mode)
>    (define-key shell-mode-map '[C-return] 'shell-enter-and-resync-dirs)
>    (setq tab-width 8)
>    (setq font-lock-mode nil))
> 
> The problem is when I open a shell ("M-x shell"), I can't stop a
> process with a BREAK signal (typing C-c C-c or choosing BREAK from the
> Signals menu).  I see "C-c C-c" in the shell window, but the process
> doesn't halt.
> 
> Any clues to what's going on here?  Thanks in advance.

I've seen the same thing, but only when the command I'm trying to 
interrupt is setuid.  I posted here (or maybe in a comp.sys.mac group) 
months ago and never got a useful answer.

The workaround is to type "C-q C-c RET" to send a literal Control-C 
rather than a signal.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

Re: break signal on Mac OS X doesn't work

[David Goodger]

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[Barry Margolin]
> I've seen the same thing, but only when the command I'm trying to
> interrupt is setuid.

Mine aren't setuid.  It's any command at all -- I can't interrupt
anything.  For example,

     while [ 1 ] ; do sleep 1 ; done

I end up having to open up another shell, and kill the process
from there.

> I posted here (or maybe in a comp.sys.mac group)
> months ago and never got a useful answer.
>
> The workaround is to type "C-q C-c RET" to send a literal Control-C
> rather than a signal.

Even that doesn't work for me :-(

Thanks for replying!

--
David Goodger <http://python.net/~goodger>

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Re: break signal on Mac OS X doesn't work

[David Goodger]

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[Barry Margolin]
>> The workaround is to type "C-q C-c RET" to send a literal Control-C
>> rather than a signal.

[David Goodger]
> Even that doesn't work for me :-(

But Barry's off-list suggestion to examine process-connection-type
led to a solution:

(setq process-connection-type t)

Thanks Barry!

--
David Goodger <http://python.net/~goodger>

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break signal on Mac OS X doesn't work

[David Goodger]

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System identification: I'm running GNU Emacs 21.3.50.1 on Mac OS X
10.3.7.  It runs in a window that starts out saying "Terminal" in the
title bar, before Emacs takes over.  My .emacs file contains this
setup code:

; shell mode
(setq explicit-shell-file-name "bash")
(setq explicit-bash-args '("--login" "--noediting" "-i"))
(add-hook 'shell-mode-hook 'my-shell-mode-hook)
(defun my-shell-mode-hook ()
   "Customize shell-mode"
   (define-key shell-mode-map "\C-cf" 'font-lock-mode)
   (define-key shell-mode-map '[C-return] 'shell-enter-and-resync-dirs)
   (setq tab-width 8)
   (setq font-lock-mode nil))

The problem is when I open a shell ("M-x shell"), I can't stop a
process with a BREAK signal (typing C-c C-c or choosing BREAK from the
Signals menu).  I see "C-c C-c" in the shell window, but the process
doesn't halt.

Any clues to what's going on here?  Thanks in advance.

--
David Goodger <http://python.net/~goodger>

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