From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id 8F44BE008D9; Tue, 18 Nov 2014 22:00:56 -0800 (PST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 X-Spam-HAM-Report: * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, * medium trust * [147.11.1.11 listed in list.dnswl.org] Received: from mail.windriver.com (mail.windriver.com [147.11.1.11]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id 40576E008C3 for ; Tue, 18 Nov 2014 22:00:53 -0800 (PST) Received: from ALA-HCA.corp.ad.wrs.com (ala-hca.corp.ad.wrs.com [147.11.189.40]) by mail.windriver.com (8.14.9/8.14.5) with ESMTP id sAJ60kLA000431 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Tue, 18 Nov 2014 22:00:47 -0800 (PST) Received: from [128.224.162.226] (128.224.162.226) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server (TLS) id 14.3.174.1; Tue, 18 Nov 2014 22:00:46 -0800 Message-ID: <546C320E.2010104@windriver.com> Date: Wed, 19 Nov 2014 14:00:46 +0800 From: ChenQi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.2 MIME-Version: 1.0 To: Stefan Eichenberger , "yocto@yoctoproject.org" References: <546AB7E7.5010304@windriver.com> <546B7517.9040003@netmodule.com> In-Reply-To: <546B7517.9040003@netmodule.com> X-Originating-IP: [128.224.162.226] Subject: Re: Busybox sh link X-BeenThere: yocto@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Discussion of all things Yocto Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Nov 2014 06:00:56 -0000 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit On 11/19/2014 12:34 AM, Stefan Eichenberger wrote: > On 11/18/2014 04:07 AM, ChenQi wrote: >> On 11/17/2014 10:07 PM, Stefan Eichenberger wrote: >>> Hello all >>> >>> I have a question regarding busybox and sh. If I want to install >>> bash together with busybox ash, yocto does not consider the >>> ALTERNATIVE_PRIORITY in each case (e.g. if bash is installed before >>> busybox). The problem is that do_install of busybox creates a link >>> to busybox.nosuid. Is there a reason for that? Shouldn't >>> update-alternatives create that link for us? There is already a >>> patch available that targets this problem >>> (467b19efbaa9c0cb04d2665e8cd9a0919849a5ed ) but it only works if ash >>> is completely disabled in the busybox config. >>> >>> So the main question is, wouldn't it be possible to remove this >>> lines completely? >>> >>> Regards, >>> Stefan >>> >>> >> >> I can confirm that this is indeed a problem. And we need to fix this. >> I think the reason for this line is mainly to make 'busybox' provide >> '/bin/sh' so that do_rootfs would succeed. >> >> Regards, >> Chen Qi > > Probably I miss something but I don't understand why do_rootfs fails > if the link is not provided? Isn't the link created anyhow during > package installation in the postinstall script with > update-alternatives if necessary? > > For testing I removed the link creation temporary from the recipe and > built the core-image-minimal for qemux86, it was creating the link > correctly in this case. > > Regards, > Stefan > > Hi Stefan, I did some testing, and could not reproduce the problem. I then realized that as the sh link is managed by ALTERNATIVES mechanism, it will always point to bash instead of busybox. I tested it by the following steps: 1. build core-image-minimal with bash installed 2. reinstall bash 3. reinstall busybox So I think the current code is right. I'm not sure if I missed something. If so, could you please provide more information? Best Regards, Chen Qi