Clever Geek Handbook

How do I assign the result of an eval to a variable in a bash script?

I have a bash script that returns the list I want, but I need to put the results in a variable so that I can work with them one at a time in a for loop.

#!/bin/bash
processID="ps aux | grep `date +"%b"` | gawk '{print \$2}'"

eval $processID

How do I assign the result of eval to a variable? Thanks to

+3


source to share


2 answers 


pid=$( ps aux | grep `date +"%b"` | awk '{print $2}' )


+1


source


You can disable the need for grep since you are already using awk. "$" Don't need to be escaped because no extensions appear inside single quotes.

pid=$(ps aux | awk -vdate=$(date +%b) '$0 ~ date { print $2 }')


If you are expecting multiple pids to return, use an array:

pids=($(ps aux | awk -vdate=$(date +%b) '$0 ~ date { print $2 }'))

for pid in "${pids[@]}"; do
   ...
done
+1


source






More articles:


All Articles