I am modifying/re-writing some of the scripts written by former employees of my company and in one of the shell scripts I found the following line.
b=`benchmark=30;grep "Waiting for timer" wk.txt | awk -vbenchmark=$benchmark '$6 > benchmark' | wc -l`
But my bad, I couldn't figure out what the above line is trying to do. I am confused about the usage of 'benchmark' variable here. I created a dummy 'wk.txt' file with the following values and the when echoed, variable $b got the value 1 (which is just a line count of the output of the grep+awk command.
[sreeraj@server ~]$ cat wk.txt 24 here above the Waiting for timer 37 make sure
Could someone explain what the script author is trying to do with the $benchmark?
awk man page says the below for
-v, but I am not I understood what it does.
-v var=val --assign var=val Assign the value val to the variable var, before execution of the program begins. Such variable values are available to the BEGIN block of an AWK program.