From: Philippe Troin <phil@fifi.org>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: Martin Cracauer <cracauer@cons.org>, zsh-workers@sunsite.dk
Subject: Re: zsh 4.3.10 terminates with SIGINT when one types Ctrl-G in emacs under Mac OS X
Date: 25 Jul 2009 23:24:35 -0700 [thread overview]
Message-ID: <8763dgkllo.fsf@old-tantale.fifi.org> (raw)
In-Reply-To: <090725115811.ZM23957@torch.brasslantern.com>
I've missed the beginning of the discussion, so excuse me if I restate
some points...
Bart Schaefer <schaefer@brasslantern.com> writes:
> Did you also see Eric Blake's assertion that the shell must not un-ignore
> a signal if it "starts life" with the signal ignored? That's a "trap"
> command restriction I'd never discovered before (and one I'm not very
> happy about).
I would agree with that for non-interactive shells (that is zsh
interpreting a script). However not resetting at least the terminal
signals (INT, QUIT, TTIN, TTOU, TSTP, CONT, HUP) to their default
settings (SIG_IGN) for interactive sessions could expose you to a lot
of trouble.
> } On first sight it looks like the Linux kernel changes semantics based
> } on whether the terminal is in cooked mode or not. Possibly in an
> } attempt to help a bit with the "what to do on SIGINT in interactive
> } programs" mess we are dealing with here.
>
> I suspect it's more subtle than that ... e.g., it may be that on linux,
> the SIGINT isn't coming from the terminal driver at all.
Please enligthen me on this one...
Phil.
next prev parent reply other threads:[~2009-07-26 6:25 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-22 18:18 Martin Cracauer
2009-07-25 18:58 ` Bart Schaefer
2009-07-26 6:24 ` Philippe Troin [this message]
2009-07-26 21:14 ` Bart Schaefer
2009-07-27 23:10 ` Martin Cracauer
2009-07-28 4:29 ` Bart Schaefer
-- strict thread matches above, loose matches on Subject: below --
2009-07-12 20:59 Vincent Lefevre
2009-07-12 21:50 ` Bart Schaefer
2009-07-13 0:43 ` Vincent Lefevre
2009-07-13 2:36 ` Bart Schaefer
2009-07-13 18:39 ` Peter Stephenson
2009-07-16 16:24 ` Vincent Lefevre
2009-07-18 5:29 ` Bart Schaefer
2009-07-18 10:16 ` Vincent Lefevre
2009-07-18 18:16 ` Bart Schaefer
2009-07-19 18:03 ` Bart Schaefer
2009-07-19 19:15 ` Bart Schaefer
2009-07-19 20:14 ` Bart Schaefer
2009-07-19 20:41 ` Peter Stephenson
2009-07-18 18:35 ` Bart Schaefer
2009-07-18 23:09 ` Vincent Lefevre
2009-07-19 9:51 ` Vincent Lefevre
2009-07-19 16:32 ` Bart Schaefer
2009-07-19 22:24 ` Vincent Lefevre
2009-07-19 18:31 ` Bart Schaefer
2009-07-20 8:31 ` Vincent Lefevre
2009-07-22 2:58 ` Eric Blake
2009-07-22 8:16 ` Vincent Lefevre
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