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Full Discussion: Capture the last record number using "awk" NR variable
Top Forums Shell Programming and Scripting Capture the last record number using "awk" NR variable Post 302991248 by zaxxon on Wednesday 8th of February 2017 08:52:13 AM
Old 02-08-2017
The number of records which is NR contains the current line number. awk has an END{} block, where when it is reached NR will have the number 21 as value in your case.
Anyway, I second what the others say, that the least complex tool needed to do the job might be the tool of choice.

If I got it right, you just want to read an input file and do something with every line.

This could generally also be done with something like this:

Code:
while read LINE; do
    echo $LINE
done < infile

...where the echo could be something else of course.
This way you don't even need to know how many lines you have to use it in a for-loop, as it cycles over every line anyway.
This User Gave Thanks to zaxxon For This Post:
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OTFDUMP(1)							   User Commands							OTFDUMP(1)

NAME

       otfdump - otfdump

DESCRIPTION

	      otfdump - convert otf traces or parts of it into a human readable, long

	      version

	      Options:

       -h, --help
	      show this help message

       -V     show OTF version

       -f <n> set max number of filehandles available (default: 50)

       -o <file>
	      output file if the ouput file is unspecified the stdout will be used

       --num <a> <b>
	      output only records no. [a,b]

       --time <a> <b> output only records with time stamp in [a,b]

       --nodef
	      omit definition records

       --noevent
	      omit event records

       --nostat
	      omit statistic records

       --nosnap
	      omit snapshot records

       --nomarker
	      omit marker records

       --nokeyvalue
	      omit key-value pairs

       --fullkeyvalue show key-value pairs including the contents
	      of byte-arrays

       --procs <a>
	      show only processes <a> <a> is a space-seperated list of process-tokens

       --records <a>
	      show  only  records  <a>	<a> is a space-seperated list of record-type-numbers record-type-numbers can be found in OTF_Definitions.h
	      (OTF_*_RECORD)

       -s, --silent
	      do not display anything except the time otfdump needed to read the tracefile

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