Shell Programming and Scripting

Hi,
i am new to linux programming fraternity but looks like starting with a big thing...
yes..xml parsing (it is indeed tough for a beginner like me) so need your kind help...

The snippet of xml looks like:

Code:

<snapshot>
<tag1>
<key>1234</key>
<keytype>abcd</keytype>
</tag1>

<tag2>
<key>unique</key>
<keytype>efgh</keytype>
<description>Source</description>
</tag2>

<tag3>
<key>5678</key>
<keytype>ijkl</keytype>
<description>new account</description>
</tag3>
</snapshot>

Now I need to write a shell script (KSH) to search for the string "unique". It should be like if key matches the value unique then do {...}.
Can you please help parsing this value although tag is same i.e. key?

Thanks in advance...

Hello,

Please use code tags while posting commands and codes as per forum rules. If we only want to search the word then following may help.

Code:

awk '/unique/ {print $0}'  file_name

Output will be as follows.

Code:

<key>unique</key>

Thanks,
R. Singh

Thanks for your prompt response.
But unfortunately this doesn't work...

It is printing the complete xml.
I only need to print "unique" in a variable.

Hello,

Following may help you in same.

Code:

awk '/unique/ {print}' file_name | sed 's/\(.*\>\)\(.*\)\(\<.*\)/\2/g'

Thanks,
R. Singh

I truly appreciate your help Ravinder. But this also doesnt work.
I have attached the test file for your reference too..


I am looking for "ValueToBePrinted" data to be fetched and printed in a variable.

I am looking for the output as:
ValueToBePrinted

Hello,

Please try to use the following in your script/code.

Code:

$ a=`sed 's/\(.*\)\(ValueToBePrinted\)\(.*\)/\2/g;s/^\<.*//g' check_xml_file_check12113  | grep -v '^$'`

$ echo $a
ValueToBePrinted

Note: Where check_xml_file_check12113 is the input file name.

Thanks,
R. Singh

Hi rookie_2014,
The awk script RavinderSingh13 provided in message #2 in this thread did exactly what you asked for in message #1 in this thread.

The awk and sed script RavinderSingh13 provided in message #4 in this thread did exactly what you asked for in message #3 in this thread.

The sed and grep script RavinderSingh13 provdied in message #6 in this thread did exactly what you asked for in message #5 in this thread. (Although the ksh script:

Code:

variable='ValueToBePrinted'
printf '%s\n' "$variable"

would have done the same thing and would be much simpler.)

The fact that the testfile.xml file that you provided in message #5 in this thread is COMPLETELY different from the sample file your that provided in message #1 in this thread and the fact that you have given no logic as to why data between XML <LoanIdentifier> and </LoanIdentifier> tags containing the string ValueToBePrinted should be selected and printed instead of the values 121315 and 12345 (which also appear between the same tags in testfile.xml) tells us that you either don't understand your assignment or haven't looked at you sample input enough to be able to describe what you're trying to do.

Is this a homework assignment?

What are you really trying to do?
It is really hard for us to help you if you won't clearly explain what you are trying to do. And, it is even harder if the sample input you show us is not representative of the actual input you will be processing!