Invoking a script whenever ip monitor writes into stdout

Question

I would like to run ip monitor in the background and invoke a script whenever a new block of output is sent to stdout by ip monitor (or, ideally, if there are several new blocks sent within say 3 seconds, only invoke the script once)

I would like to use bash or python, but I'm open to other suggestions as well.

What is the best way to approach this?

Let's go with bash. Are you familiar with 1) piping a command's output to another command and 2) the `read` command? — sneep, Mar 27 '18 at 11:34

Gilles Quénot · Accepted Answer · 2018-03-27T22:38:14.563

3

Using a while loop with read :

$ ip monitor all | while IFS= read -r line; do
    echo "CATCHED: $line";
    ./script "$line"
done

bash FAQ#1

Or using xargs :

ip monitor all | xargs -n1 ./script

edited Mar 27 '18 at 22:38

answered Mar 27 '18 at 12:14

Gilles Quénot

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Invoking a script whenever ip monitor writes into stdout

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