Path: csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail
From: Greg Wooledge <wooledg@eeg.ccf.org>
Newsgroups: gnu.bash.bug
Subject: Re: Protect Loop Execution with Traps
Date: Wed, 29 Jan 2020 15:22:44 -0500
Lines: 18
Approved: bug-bash@gnu.org
Message-ID: <mailman.64.1580329368.2384.bug-bash@gnu.org>
References: <20200128212551.GD12574@localhost4.local> <20200128020322.GA31704@localhost4.local> <20200128134935.GM1350@eeg.ccf.org> <20200128204932.GB12574@localhost4.local> <20200128210721.GU1350@eeg.ccf.org> <59.1580277932@jinx.noi.kre.to> <20200129143352.GY1350@eeg.ccf.org> <20200129201907.GA17112@localhost4.local> <20200129202244.GL1350@eeg.ccf.org>
NNTP-Posting-Host: lists.gnu.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: usenet.stanford.edu 1580329369 21512 209.51.188.17 (29 Jan 2020 20:22:49 GMT)
X-Complaints-To: action@cs.stanford.edu
Cc: bug-bash@gnu.org
To: Roger <rogerx.oss@gmail.com>
Envelope-to: bug-bash@gnu.org
Mail-Followup-To: Roger <rogerx.oss@gmail.com>, bug-bash@gnu.org
Content-Disposition: inline
In-Reply-To: <20200129201907.GA17112@localhost4.local>
User-Agent: Mutt/1.10.1 (2018-07-13)
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy]
X-Received-From: 139.137.100.1
X-BeenThere: bug-bash@gnu.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Bug reports for the GNU Bourne Again SHell <bug-bash.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/bug-bash>
List-Post: <mailto:bug-bash@gnu.org>
List-Help: <mailto:bug-bash-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=subscribe>
X-Mailman-Original-Message-ID: <20200129202244.GL1350@eeg.ccf.org>
X-Mailman-Original-References: <20200128212551.GD12574@localhost4.local> <20200128020322.GA31704@localhost4.local> <20200128134935.GM1350@eeg.ccf.org> <20200128204932.GB12574@localhost4.local> <20200128210721.GU1350@eeg.ccf.org> <59.1580277932@jinx.noi.kre.to> <20200129143352.GY1350@eeg.ccf.org> <20200129201907.GA17112@localhost4.local>
Xref: csiph.com gnu.bash.bug:15849

On Wed, Jan 29, 2020 at 03:19:07PM -0500, Roger wrote:
> >sigint_handler() {
> >    trap - INT
> >    kill -INT $$
> >}
> >trap sigint_handler INT
> 
> One thing to note here, I tried inserting the "trap sigint_handler INT" prior 
> to the loop/for/while statement (or outside of the loop) and the trap doesn't 
> work as you state it does for yourself.
> 
> I find I have to insert "trap sigint_handler INT" within my loop (for/while) 
> section of code, for the trap to work.  In my eyes or for me, this works as 
> expected.

That sounds like your loop is inside a subshell.  Possibly because
you're using it in a pipeline, or possibly other reasons.