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Full Discussion: Linux xmllint schema validation fails but error code 0
Top Forums Shell Programming and Scripting Linux xmllint schema validation fails but error code 0 Post 302828113 by mknag on Monday 1st of July 2013 09:02:02 PM
Old 07-01-2013
shell script xmllint schema validation error code 0
Command line xmllint --schema validation fails but $? returns 0

myinput.xml:
Code:
<myinput><header>mytestvalue</header></myinput>

myschema.xsd
Code:
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:element name="myinput" type="xsd:string"/>
</xsd:schema>

Command:
Code:
$xmllint --schema myschema.xsd myinput.xml

Result:
Element myinput: child header should not be present
myinput.xml fails to validate

Command:
Code:
$echo $?

Result:
0

Could someone tell me why xmllint schema validation failure is not returned as an error? Or suggest me ways to capture this as an error in my shell script? In my shell script, current I am validating the above xmllint command in an "if" block and it fails only for xml well-formedness but succeeds for schema validation failure.

if the above is not returned as error, should I go about doing the ugly way of "grep fails" on the xmllint output to figure-out if schema validation succeeded or failed? Any thoughts?
Last edited by mknag; 07-02-2013 at 09:54 AM..
 

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LEARN ABOUT DEBIAN

virt-xml-validate

VIRT-XML-VALIDATE.IN(1) 				      Virtualization Support					   VIRT-XML-VALIDATE.IN(1)

NAME

	 virt-xml-validate - validate libvirt XML files against a schema

SYNOPSIS

	 virt-xml-validate XML-FILE [SCHEMA-NAME]

DESCRIPTION

       Validates a libvirt XML for compliance with the published schema.  The first compulsory argument is the path to the XML file to be
       validated. The optional second argument is the name of the schema to validate against. If omitted, the schema name will be inferred from
       the name of the root element in the XML document.

       Valid schema names currently include

       "domain"
	   The schema for the XML format used by guest domains configuration

       "network"
	   The schema for the XML format used by virtual network configuration

       "storagepool"
	   The schema for the XML format used by storage pool configuration

       "storagevol"
	   The schema for the XML format used by storage volume descriptions

       "nodedev"
	   The schema for the XML format used by node device descriptions

       "capability"
	   The schema for the XML format used to declare driver capabilities

EXIT STATUS

       Upon successful validation, an exit status of 0 will be set. Upon failure a non-zero status will be set.

AUTHOR

       Daniel P.Berrange

BUGS

       Report any bugs discovered to the libvirt community via the mailing list "http://libvirt.org/contact.html" or bug tracker
       "http://libvirt.org/bugs.html".	Alternatively report bugs to your software distributor / vendor.

COPYRIGHT

       Copyright (C) 2009-2010 by Red Hat, Inc.  Copyright (C) 2009 by Daniel P. Berrange

LICENSE

       virt-xml-validate is distributed under the terms of the GNU GPL v2+.  This is free software; see the source for copying conditions. There
       is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE

SEE ALSO

       virsh(1), online XML format descriptions "http://libvirt.org/format.html"

libvirt-0.9.12.2						    2014-01-11						   VIRT-XML-VALIDATE.IN(1)
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