From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: [RFC Patch v4 7/9] correct xc_domain_save()'s
 return value
Date: Mon, 22 Sep 2014 10:13:34 +0200
Message-ID: <20140922081334.GA16085@aepfle.de>
References: <1411365561-29242-1-git-send-email-wency@cn.fujitsu.com>
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	<20140922073053.GA6584@aepfle.de> <541FD0F4.8080400@cn.fujitsu.com>
	<20140922074625.GA9788@aepfle.de> <541FD88B.5080209@cn.fujitsu.com>
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To: Wen Congyang <wency@cn.fujitsu.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Jiang Yunhong <yunhong.jiang@intel.com>, Dong Eddie <eddie.dong@intel.com>, xen devel <xen-devel@lists.xen.org>, Yang Hongyang <yanghy@cn.fujitsu.com>, Lai Jiangshan <laijs@cn.fujitsu.com>
List-Id: xen-devel@lists.xenproject.org

On Mon, Sep 22, Wen Congyang wrote:

> The callbacks may be implemented in libxl, which is another process.
> xc_domain_save() is a public API, and the caller may forget to set
> the errno...
> 
> So we cannot assume that the callbacks has set the errno

Then the caller is using xc_domain_save incorrectly.
Looks like there is no API documentation, other than the source code.

Olaf