Shell Programming and Scripting

I want to fetch value from a particular location from a file but in each line in the file it appears at a different position so i tried using variable with cut command but it is not working properly. The code i have written is

Code:

#!/bin/sh
cat Sri1.log |
while read d2
do
   grep -w 'RemittanceId' | awk -v find='RemittanceId' '{loc=index($0,find)}' 
   locations=`expr $loc + 13`
   locatione=`expr $location + 15`
   cut -c $locations,$locatione >> ab.txt
done

I am storing the start and end values in the variables but it's not working fine. It doesn't give any output

Moderator's Comments:

Please use code tags next time for your code and data.

there is no input for grep command

you didnt use d2 value anywhere in the script

Code:

echo $d2 | grep -w 'RemittanceId' | awk -v find='RemittanceId' '{loc=index($0,find)}'

Also, instead of using cat, you can use it like this

Code:

 
while read d2
do
...
...
done < Sri1.log

---------- Post updated at 11:42 AM ---------- Previous update was at 11:41 AM ----------

also, you didnt print the loc value in the awk

and what is $loc and $locations ?

Thanku for the reply
I tried doing that.It works fine but not givingme the desired output since

loc returns value 0

but when a try to write the output of awk in a file it gives the all the locations at which value is present.

Hiw can a fetch the value of loc the moment it encounters taht line and moving on to next line.

I tried defining the variable locations and locatione inside the action part of awk but it didn't worked

echo $d2|grep -w 'RemittanceId' | awk -v find='RemittanceId' '{loc=index($0,find), locations=`expr $loc + 13` , locatione=`expr $location + 15`}'

can you provide the sample log file contents and the expected output

I can't share complete file but below is the line from the file :-

2012-05-09 10:29:30.041.... | SYNC | 00052 | DEBUG | Payment | ....Exchange | Exchange processing completed.....| B678C56D-96DA-4FFC-B40E-9A032A2EB12E-0000003 | ....... | {previous-component=Validation, Split, exchange-properties={....., RemittanceId=IUxBNzKlZfghcMxf101209090000024_1, ParserSchema=....., }

I want to fetch this RemittanceId from the file..
There are many occurrences of this Id in the whole file and at different locations

The desired output is
IUxBNzKlZfghcMxf101209090000024_1

Code:

$ nawk -F"[=,]" '{for(i=1;i<=NF;i++)if($i~/RemittanceId/)print $(i+1)}' input.log
IUxBNzKlZfghcMxf101209090000024_1

if you dont have nawk, then try with awk or gwak

---------- Post updated at 12:48 PM ---------- Previous update was at 12:45 PM ----------

Code:

 
$ nawk -F, '/RemittanceId/{split($4,a,"=");print a[2]}' input.log
IUxBNzKlZfghcMxf101209090000024_1

Thanx a lot it is working fine.. I am greatful
Can you please explain me this command since I am new to Unix and don't have much understanding how it is working