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Replace the strings in file

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# 1  
Old 06-15-2012
Replace the strings in file
Hello members,

I been following this forums since very long time.
I need to do one job.
In my script I am evaluating one variable, lets say n=100.

Now i have xml file inside which i need to replace the numbers in the desired lines with the evaluated number(n) +1.

For example let's say my file has the following entries.


Code:
 <EventMappingRule alarmFieldID="200" type="TeMIPEnumeration" alarmFieldName="Specific Problem"/>
          <Constant label="asiOutAvailableBitrate" type="Enum">1094</Constant>
        </TeMIPEnumMappingRule>
        <AdditionalTextMappingRule>
 <TeMIPEnumMappingRule type="Constant">
          <EventMappingRule alarmFieldID="200" type="TeMIPEnumeration" alarmFieldName="Specific Problem"/>
          <Constant label="softwareMgmtCompletion" type="Enum">1098</Constant>
        </TeMIPEnumMappingRule>
        <AdditionalTextMappingRule>

Desired file

Code:
<EventMappingRule alarmFieldID="200" type="TeMIPEnumeration" alarmFieldName="Specific Problem"/>
          <Constant label="asiOutAvailableBitrate" type="Enum">101</Constant>
        </TeMIPEnumMappingRule>
        <AdditionalTextMappingRule>
 <TeMIPEnumMappingRule type="Constant">
          <EventMappingRule alarmFieldID="200" type="TeMIPEnumeration" alarmFieldName="Specific Problem"/>
          <Constant label="softwareMgmtCompletion" type="Enum">102</Constant>
        </TeMIPEnumMappingRule>
        <AdditionalTextMappingRule>

Let me know how can i achieve this. Don't ask me to loop through whole file, since it is huge file.

I am thinking some thing like following:

Code:
cat $filename | sed 's/<match>/>match with replace>/g'


Thanks in advance
sai
Last edited by Scrutinizer; 06-16-2012 at 04:29 AM.. Reason: code tags
# 2  
Old 06-15-2012
Hi


Code:
$ awk -F'[>]' '/Constant label/{sub(/^[0-9]+/,++i,$2);}1' i=100 OFS='>' file
<EventMappingRule alarmFieldID="200" type="TeMIPEnumeration" alarmFieldName="Specific Problem"/>
<Constant label="asiOutAvailableBitrate" type="Enum">101</Constant>
</TeMIPEnumMappingRule>
<AdditionalTextMappingRule>
<TeMIPEnumMappingRule type="Constant">
<EventMappingRule alarmFieldID="200" type="TeMIPEnumeration" alarmFieldName="Specific Problem"/>
<Constant label="softwareMgmtCompletion" type="Enum">102</Constant>
</TeMIPEnumMappingRule>
<AdditionalTextMappingRule>

# 3  
Old 06-16-2012
One more condition
Hey thanks Smilie that worked but just wanted to add one more condition to it.

In the condition below, i want to check and substitute only lines which has "alarmFieldName="Specific Problem"/>" in their preceding lines.

Code:
awk -F'[>]' '/Constant label/{sub(/^[0-9]+/,++i,$2);}1' i=100 OFS='>' file

Last edited by Scrutinizer; 06-16-2012 at 04:29 AM.. Reason: code tags
# 4  
Old 06-16-2012
I see you already have a solution in AWK, just wanted to show a perl one liner as an example:
Code:
perl -le '$n=100;while (<>){chomp;s/\>\d+\</$n++/e;print $_;}' test.txt

# 5  
Old 06-17-2012
@spacebar
Hi,

The script I am using is a shell script. I don't want to invoke perl interpreter here.

In the condition below, i want to check and substitute only lines which has "alarmFieldName="Specific Problem"/>" in their preceding lines.
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