Convert multiline string to array

Question

I have this script:

nmapout=`sudo nmap -sP 10.0.0.0/24`
names=`echo "$nmapout" | grep "MAC" | grep -o \'(.\\+)\'`
echo "$names"
         


        

Answer 1

Set IFS. Shell uses IFS variable to determine what the field separators are. By default IFS is set to the space character. Change it to newline.

#!/bin/bash
names="Netgear
Hon Hai Precision Ind. Co.
Apple"

SAVEIFS=$IFS   # Save current IFS
IFS=$'\n'      # Change IFS to new line
names=($names) # split to array $names
IFS=$SAVEIFS   # Restore IFS

for (( i=0; i<${#names[@]}; i++ ))
do
    echo "$i: ${names[$i]}"
done

Output

0: Netgear
1: Hon Hai Precision Ind. Co.
2: Apple