Getting the output of a cat command into an array

Question

How can I get just the filenames into an array using the cat command?

How I've been trying:

array=()
while IFS= read -r -d $'\0'; do
  array+=("$REPLY")
done < <(cat /proc/swaps | grep "swap")

This either grabs all the information from the output into an array, or just doesn't work. How can I successfully get my expected output of [/swapfile, /dev/hda1, /some/other/swap] into an array form using the cat command?

karakfa · Accepted Answer · 2018-05-22 15:29:24Z

1

readarray array < <(awk '/swap/{print $1}' /proc/swaps)

answered May 22, 2018 at 15:29

karakfa

67.8k8 gold badges45 silver badges59 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Eby Jacob · Accepted Answer · 2018-05-22 16:20:19Z

0

Bash introduced readarray in version 4 which can take the place of the while read loop. readarray is the solution you want.

here is the syntax

readarray variable < inputfile
echo "${variable[0]}" ' to print the first element in array

answered May 22, 2018 at 16:20

Eby Jacob

1,4681 gold badge13 silver badges29 bronze badges

Collectives™ on Stack Overflow

Getting the output of a cat command into an array

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related