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The GNU Awk User's Guide

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4.8.8 Using getline into a Variable from a Coprocess

When you use `command |& getline var', the output from the coprocess command is sent through a two-way pipe to getline and into the variable var.

In this version of getline, none of the built-in variables are changed and the record is not split into fields. The only variable changed is var.

Coprocesses are an advanced feature. They are discussed here only because this is the section on getline. See section Two-Way Communications with Another Process, where coprocesses are discussed in more detail.


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