From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <at@altlinux.org>
Date: Fri, 21 Jan 2011 13:56:06 +0300
From: Alexey Tourbin <at@altlinux.ru>
To: ALT Linux Team development discussions <devel@lists.altlinux.org>
Message-ID: <20110121105606.GK5889@altlinux.org>
References: <20110121100156.GA12955@mw.mithraen.ru>
	<20110121101829.GI5889@altlinux.org>
	<201101211329.38673.serpiph@nikiet.ru>
Mime-Version: 1.0
Content-Type: text/plain; charset=koi8-r
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <201101211329.38673.serpiph@nikiet.ru>
Subject: Re: [devel] shell programming
X-BeenThere: devel@lists.altlinux.org
X-Mailman-Version: 2.1.12
Precedence: list
Reply-To: ALT Linux Team development discussions <devel@lists.altlinux.org>
List-Id: ALT Linux Team development discussions <devel.lists.altlinux.org>
List-Unsubscribe: <https://lists.altlinux.org/mailman/options/devel>,
	<mailto:devel-request@lists.altlinux.org?subject=unsubscribe>
List-Archive: <http://lists.altlinux.org/pipermail/devel>
List-Post: <mailto:devel@lists.altlinux.org>
List-Help: <mailto:devel-request@lists.altlinux.org?subject=help>
List-Subscribe: <https://lists.altlinux.org/mailman/listinfo/devel>,
	<mailto:devel-request@lists.altlinux.org?subject=subscribe>
X-List-Received-Date: Fri, 21 Jan 2011 10:56:07 -0000
Archived-At: <http://lore.altlinux.org/devel/20110121105606.GK5889@altlinux.org/>
List-Archive: <http://lore.altlinux.org/devel/>
List-Post: <mailto:devel@altlinux.org>

On Fri, Jan 21, 2011 at 01:29:38PM +0300, Sergei Epiphanov wrote:
> Может, так лучше?
> 
> finished=
> 
> func() {
>         <что-то>
>         finished=1
> }
> 
> func &

Нет. :)

Функция func теперь будет выполняться в родительском процессе (subshell),
$! - это номер процесса, который вернул fork(2).  Переменные между
процессами не разделяются.

> for 1 2 3 4 5; do
>         sleep 1
>         if [ -n "$finished" ]; then
>                 wait
>                 break
>         fi
> done
> 
> if [ -z "$finished" ]; then
>         echo killing func >&2
>         kill $!
>         wait
> fi