X-Recipient: archive-cygwin AT delorie DOT com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:references
	:mime-version:content-type:content-transfer-encoding
	:in-reply-to; q=dns; s=default; b=oBjw62bdftD0KOfj994KYyHJoumdNv
	xKtZBQywlc3DxgT/F7Qq+QaWzmsx/RHHHRdq+jMs65ELSw/b8lyoNfn9vWW8sh7T
	13/J9i383+upYRqMHnrnaEnL1BHJsguvv54d+Mfg48MOZFizQK0xgyWYqiYgna6b
	kaEXNxnAD4+/w=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:references
	:mime-version:content-type:content-transfer-encoding
	:in-reply-to; s=default; bh=0Gzgl8K3YIVSQs76h0RH0RvszrU=; b=sz8x
	VzsVBFfYezqWm2/o4T0K9aEJGwu/AltKKPiGqBwGkvvJTPENJzDnB92+jeUeapWA
	ViX5OHn0pUQwHuVf0YRhEyAixP6j/Pc9LwTv0oBT1jUpwv3S5XrxUtsGX/gQZEIP
	iU8+hkzp9O5Zsk9US04HZcFSIU6UcBDtzl/FhW8=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-1.6 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD,SPF_PASS autolearn=unavailable version=3.3.2 spammy=HContent-Transfer-Encoding:8bit
X-HELO: mail.spocom.com
Date: Thu, 13 Jul 2017 22:27:36 -0700
From: Gary Johnson <garyjohn AT spocom DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: How to repeat a bash shell script until success
Message-ID: <20170714052736.GA2895@phoenix>
Mail-Followup-To: cygwin AT cygwin DOT com
References: <97021E71-D804-42AF-8358-6276AF4514AB AT gmail DOT com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <97021E71-D804-42AF-8358-6276AF4514AB@gmail.com>
User-Agent: Mutt/1.5.20 (2009-06-14)
X-IsSubscribed: yes

On 2017-07-12, Bryan Dunphy wrote:
> I have a shell script, originally created for Mac OS X. that waits
> for an external drive to be mounted (by testing an “ls” of the
> volume’s root directory for success) then runs an “rsync” command.
> How do I get the script to be run repeatedly until successful exit
> under Cygwin?
> 
> Here is the unmodified Mac OS version of the script:
> 
> #!/bin/bash
> if ls /Volumes/Shared >/dev/null 2>/dev/null
> then
>         rsync -avz --compress-level=9 --delete-during --partial --exclude 'cache/' aleph.gutenberg.org::gutenberg /Volumes/Shared/Project-Gutenberg
>         exit 0
> else
>         exit 1
> fi

Let the name of your script be "myscript".  The following will run
myscript every two seconds until it succeeds.

    while ! myscript; do sleep 2; done

This is really a bash programming question and is not specific to
Cygwin.

Regards,
Gary


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple