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Top Forums Shell Programming and Scripting Extracting the value of an attribute tag from XML Post 302416213 by alister on Sunday 25th of April 2010 03:23:02 PM
Old 04-25-2010
Hello, JesterMania and welcome to the forums.

Assuming that all the relevant lines match the format of your sample data, if you have the value of the NAME attribute in a shell variable ($name in what follows), you can extract the value with the following AWK snippet:

Code:
$ name=Memory
$ awk -F\" -v n="$name" '/<ATTRIBUTE NAME="/ && $2==n {print $4}' data
512MB
$ name="CPU Speed"
$ awk -F\" -v n="$name" '/<ATTRIBUTE NAME="/ && $2==n {print $4}' data
3.0GHz
$ name="Video Card"
$ awk -F\" -v n="$name" '/<ATTRIBUTE NAME="/ && $2==n {print $4}' data
4870

Regards,
Alister
 

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IPTABLES-XML(8) 														   IPTABLES-XML(8)

NAME
iptables-xml -- Convert iptables-save format to XML SYNOPSIS
iptables-xml [-c] [-v] DESCRIPTION
iptables-xml is used to convert the output of iptables-save into an easily manipulatable XML format to STDOUT. Use I/O-redirection pro- vided by your shell to write to a file. -c, --combine combine consecutive rules with the same matches but different targets. iptables does not currently support more than one target per match, so this simulates that by collecting the targets from consecutive iptables rules into one action tag, but only when the rule matches are identical. Terminating actions like RETURN, DROP, ACCEPT and QUEUE are not combined with subsequent targets. -v, --verbose Output xml comments containing the iptables line from which the XML is derived iptables-xml does a mechanistic conversion to a very expressive xml format; the only semantic considerations are for -g and -j targets in order to discriminate between <call> <goto> and <nane-of-target> as it helps xml processing scripts if they can tell the difference between a target like SNAT and another chain. Some sample output is: <iptables-rules> <table name="mangle"> <chain name="PREROUTING" policy="ACCEPT" packet-count="63436" byte-count="7137573"> <rule> <conditions> <match> <p>tcp</p> </match> <tcp> <sport>8443</sport> </tcp> </conditions> <actions> <call> <check_ip/> </call> <ACCEPT/> </actions> </rule> </chain> </table> </iptables-rules> Conversion from XML to iptables-save format may be done using the iptables.xslt script and xsltproc, or a custom program using libxsltproc or similar; in this fashion: xsltproc iptables.xslt my-iptables.xml | iptables-restore BUGS
None known as of iptables-1.3.7 release AUTHOR
Sam Liddicott <azez@ufomechanic.net> SEE ALSO
iptables-save(8), iptables-restore(8), iptables(8) Jul 16, 2007 IPTABLES-XML(8)
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