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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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RAKE(1) 						 Ruby Programmers Reference Guide						   RAKE(1)

NAME
rake -- Ruby Make SYNOPSIS
rake [--f Rakefile] [--version] [-CGNPgnqstv] [-D [PATTERN]] [-E CODE] [-I LIBDIR] [-R RAKELIBDIR] [-T [PATTERN]] [-e CODE] [-p CODE] [-r MODULE] [--rules] [variable=value] target ... DESCRIPTION
Rake is a simple ruby(1) build program with capabilities similar to the regular make(1) command. Rake has the following features: o Rakefiles (Rake's version of Makefiles) are completely defined in standard Ruby syntax. No XML files to edit. No quirky Makefile syntax to worry about (is that a tab or a space?). o Users can specify tasks with prerequisites. o Rake supports rule patterns to synthesize implicit tasks. o Flexible FileLists that act like arrays but know about manipulating file names and paths. o A library of prepackaged tasks to make building rakefiles easier. OPTIONS
--version Display the program version. -C --classic-namespace Put Task and FileTask in the top level namespace -D [PATTERN] --describe [PATTERN] Describe the tasks (matching optional PATTERN), then exit. -E CODE --execute-continue CODE Execute some Ruby code, then continue with normal task processing. -G --no-system --nosystem Use standard project Rakefile search paths, ignore system wide rakefiles. -I LIBDIR --libdir LIBDIR Include LIBDIR in the search path for required modules. -N --no-search --nosearch Do not search parent directories for the Rakefile. -P --prereqs Display the tasks and dependencies, then exit. -R RAKELIBDIR --rakelib RAKELIBDIR --rakelibdir RAKELIBDIR Auto-import any .rake files in RAKELIBDIR. (default is rakelib ) -T [PATTERN] --tasks [PATTERN] Display the tasks (matching optional PATTERN) with descriptions, then exit. -e CODE --execute CODE Execute some Ruby code and exit. -f FILE --rakefile FILE Use FILE as the rakefile. -h --help Prints a summary of options. -g --system Using system wide (global) rakefiles (usually ~/.rake/*.rake ). -n --dry-run Do a dry run without executing actions. -p CODE --execute-print CODE Execute some Ruby code, print the result, then exit. -q --quiet Do not log messages to standard output. -r MODULE --require MODULE Require MODULE before executing rakefile. -s --silent Like --quiet, but also suppresses the 'in directory' announcement. -t --trace Turn on invoke/execute tracing, enable full backtrace. -v --verbose Log message to standard output (default). --rules Trace the rules resolution. SEE ALSO
ruby(1) make(1) http://rake.rubyforge.org/ REPORTING BUGS
Bugs, features requests and other issues can be logged at <http://onestepback.org/redmine/projects/show/rake>. You will need an account to before you can post issues. Register at <http://onestepback.org/redmine/account/register>. Or you can send an email to the author. AUTHOR
Rake is written by Jim Weirich <jim@weirichhouse.org> UNIX
November 7, 2012 UNIX
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