在awk中使用getline时，传递命令行参数并在命令中使用它

Question

I have a bash script which takes in 3 command line arguments. In the same bash script, I've also got an awk command where I am using this type of getline command | getline var command | getline var .

I want to be able to pass in the second command line argument into the command. How can I go about this?

Answer 1

It sounds as though you want a construct somewhat like:

awk -v COMMAND="${2}" '{ system(COMMAND) | getline var }' -

As no detail is provided in the question, and since context for the "command | getline var" command is not provided in the question, this is a silly awk script that does nothing useful. It is meant only to show how to pass variables into an awk script from within a BASH context.