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Top Forums Shell Programming and Scripting Issue with awk script parsing log file Post 302904184 by Don Cragun on Monday 2nd of June 2014 03:21:03 PM
Old 06-02-2014
Quote:
Originally Posted by Ariean
Hello Don,
My requirement is to read the log file while it is being populated and print latest count which is ($6) in your awk script code, as the process keeps appending to the log file and when the process puts a line TM_6020 Session [s_GenerateXMLDataFile] completed that means the process has been completed populating the log file or the process has ended and awk script control should exit.

Now when i executed your script against the log file which is static now as i don't have the process running parallely now and it prints the last count in the log file which seems correct but for some reason the control is not coming out.


Thank you.
I didn't write any new awk code; I slightly modified your two awk scripts and merged them into one script. If my script is picking up $6 from the wrong place, it is because that is what your script was doing.

Since you have not shown us anything at all about what your data looks like, I could only guess at what you're trying to do baed on your awk code. If I guessed wrong, you need to show us the format of the data (and a sample) we're supposed to process.

What do you mean the control is not coming out?

The script you showed us set COUNT, COUNT1, and ENDFLG and never did anything with any of them. I assumed you had code following what you showed us in your script that used one or more of those three variables (at least $COUNT).

My code only sets COUNT (since I couldn't see any need for the other two). I assumed you would add the other code you had hidden from us that would use $COUNT.

If you add the command:
Code:
printf 'COUNT is "%s"\n' "$COUNT"

to the end of the script I gave you, what does it print after the asynchronous writing process writes:
Code:
SomethingToIgnore TM_6020 Session [s_GenerateXMLDataFile] completed MaybeSomethingMoreToIgnore

into s_GenerateXMLDataFile.log?

If the writer terminates without writing the above line into the file, my script will hang forever waiting for the writer to finish its job. There is no way for this script to know that the writer is done writing if it doesn't write the line that says "I'm done" into the file.
 

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