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Top Forums UNIX for Beginners Questions & Answers Extract XML block when value is matched (Shell script) Post 303036200 by Pouky on Wednesday 19th of June 2019 02:23:59 AM
Old 06-19-2019
First of all thank you for your response jgt Smilie
The answer that you gave me isn't actually the result that I want to achieve. (My explanation isn't clear also, so the fault lies with me)
I'll try to explain it a little better.


So we have log files in our VM's and we get information from some devices through Sim cards. Due to bad practices of our sub-contractors, we have to fetch some information through the logs.
But because we have more than 4k devices that sends logs daily we have to retrieve within those +400k line log files what kind of information it sent.


The snippet that I've put in my initial post is actually the final result that I want from the log files. So you could say that above and below my snippet there is a multitude of information and xml syntax that i don't really need.


Unfortunately there isn't really a specific line where I have to look for.
Code:
if [ "${line:0:7}" = "<devID>" ]

The only thing I noticed is that my block could also start from:

Code:
2019-06-16 20:20:11,901 | INFO  | r[VSDCFE_ALARMS] | vsdc                             | 94 - org.apache.camel.camel-core - 2.17.3 | VSDCFE_ALARMS: Device alarm isssue message received contains {"time":"2019-06-16T18:20:10","deviceId":"number","alarms":[{"obis":"0;0;97;98;20;255","attributeId":"2","classId":"1","value":"0600000000"},{"obis":"0;0;97;98;21;255","attributeId":"2","classId":"1","value":"0600000000"},{"obis":"0;0;97;98;22;255","attributeId":"2","classId":"1","value":"0600800000"}]}

and end with

Code:
</alarms>

so everything in between has to be included into the output. Note also that not all "blocks" aren't the same. Depending on the information it could contain 10 or more lines for each device.
 

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XML-XPARSE(1)							   User Commands						     XML-XPARSE(1)

NAME
xml-xparse - Parse XML documents with entity and URI resolution SYNOPSIS
xml-xparse [options] xmlfile DESCRIPTION
xml-xparse is a simple command line tool for parsing and validating XML documents. It is not an actual XML parser, it just wraps around a JAXP Parser, adding support for catalog-based entity and URI resolution. OPTIONS
-c catalogfile Load a particular catalog file. May be specified multiple times. -v Perform a validating parse. This is the default. -w Perform a well-formed parse, not a validating parse. -N Perform a namespace-aware parse. This is the default. -n Perform a namespace-ignorant parse. -d debuglevel Set the debug level (an integer). Warnings are shown if the debug level is set to greater than 2. -E maxerrors Set the maximum number of errors to display. The default is 10. FILES
/etc/java/resolver/CatalogManager.properties The central catalog manager configuration file used by xml-xparse. SEE ALSO
xml-xread(1), xml-resolver(1), java(1), the OASIS entity resolution technical committee home page at <http://www.oasis-open.org/commit- tees/entity/>. AUTHOR
Norman Walsh <Norman.Walsh@Sun.COM> 1.1 July 2004 XML-XPARSE(1)
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