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08-07-2007
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How to insert at a particular position in flat file
Hi All,
I have a flat file with ~ as de-limiter (e.g: aaa~ba a~caa~0~d~e) What I want is check if the 4th character is 0 and replace it with say 4. So now it becomes : aaa~ba a~caa~4~d~e. I have to do this for the whole file, but the delimiter position remains the same, not the character length. Please help. Abhi. 
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08-07-2007
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Try this..
Code:
awk -F"~" '{if ($4==0) $4=4; print $0;}' filename
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08-07-2007
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To start:
Code:
pattern=$1
rep_string=$2
awk -F\~ -v pat=${pattern} -v rep=${rep_string} 'BEGIN{OFS=FS}{if ( $4 == pat){sub(/'"${pattern}"'/,rep,$4)}print}' txt
Last edited by Klashxx; 08-07-2007 at 01:59 AM.
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08-07-2007
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Code:
awk -F'~' 'BEGIN{OFS="~";}{ if ($4 != 4){$4=4;} print }' your_file
Code:
awk -F'~' 'BEGIN{OFS="~";}{ if ($4 == 0){$4=4;} print }' your_file
Last edited by lorcan; 08-07-2007 at 02:06 AM. Reason: Changing as per req
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