I will rephrase my question :

input file :

AAAhjfhjhjd
BBdj
CCi
CCjid
AAAjdjido
BBdj
CCi
CCjid
dhdh

expected output :

1AAAhjfhjhjd
2BBdj
3CCi
4CCjid
1AAAjdjido
2BBdj
3CCi
4CCjid
5dhdh


whenever it see AAA at the start of the line it should reset the counter and again start form 1

Welcome to LQ!

To preserve formatting place your code snippets inside [CODE]...[/CODE] tags. You may type those yourself or click the "#" button in the edit controls.

You appear to be using the right tool, awk, but it is not clear from your description how your data blocks are delineated. For example, does AAA****** always mark the beginning of a "block", or is the the END OF TRANSMISSION line?

If your code snippet represents your actual approach, then all you really need is a variable which is initially set to 1 for each file, then incremented at the beginning of each subsequent data block, wherever that may be found. Then simply append that variable to your print statement.

The way things usually work here at LQ is that you should try to find a working solution yourself, then ask for help when you get stuck somewhere, providing a minimal example which illustrates the difficulty you are having. This helps others to understand the problem itself and also gauge how to offer help in a way most appropriate to your demonstrated code preference and skill level.

You may want to review the Site FAQ for guidance in posting your questions and general forum usage. Especially, read the link in that page, How To Ask Questions The Smart Way. The more effort you put into understanding your problem and framing your questions, the better others can help!

Good luck!

What do you mean by block?
If you wanted file names and line-numbers prefixed to every line, you could simply do this:
Output:

1 members found this post helpful.

I will rephrase my question :

input file :

AAAhjfhjhjd
BBdj
CCi
CCjid
AAAjdjido
BBdj
CCi
CCjid
dhdh

expected output :

1AAAhjfhjhjd
2BBdj
3CCi
4CCjid
1AAAjdjido
2BBdj
3CCi
4CCjid
5dhdh


whenver it see AAA at the start of the line it should reset the counter and again start form 1

Editing the original post then stating the same thing again is very confusing to those trying to undersstand your question. Please do not do that. Your restated question is also quite different than the original.

So, taking your restated question as the starting point, and continuing with awk as the tool of choice, that is a relatively simple problem. You have already answered it yourself, although you may not realize it.

You need only a counter variable which is incremented and prefixed to the print statement arguments, and reset to 1 each time if encounters AAA at the beginning of a line.

Take a look at your original awk code, ignore the filename portion of that code, and see if you can get it to work with a simple counter. If not, please post your code here so we can see what you have tried to do and try to explain how it is not working. That will help you to understand the problem better, and help those here to to provide useful replies.

With this InFile ...
... this awk ...
... produced this OutFile ...
Daniel B. Martin

.

1 members found this post helpful.

With this InFile ...
... this awk ...
... produced this OutFile ...
This solution uses the ternary operator which is concise but less readable.

Daniel B. Martin

.

hmmm .... would have liked to have seen OP have a go as this is not very complicated, but as a solution has been presented:

2 members found this post helpful.

Something missing in this one Daniel ... doesn't work for me:

1 members found this post helpful.

The
uses an implicit test and print. The test can have side effects. For example, an initial empty line or "0" line is not printed, because $0 becomes "0" or "00" and the implicit test sees a number and becomes false.
An explicit print makes things clear:
Initial lines are printed with prefixes 0,1,2 regardless of their contents.
I don't know what behavior the O/P intended but software should be predictable, especially if it controls a Boeing 737 max 8...

2 members found this post helpful.

You are right. I screwed up.

mechvijays (the Original Poster) posed a similar question here:
https://www.linuxquestions.org/quest...ne-4175650080/

That post asked for ...
I wrote a solution for that question and mistakenly posted it on this thread.

Daniel B. Martin

.