Redirect output to a bash array

user_53949 0
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I have a file containing the string

ipAddress=10.78.90.137;10.78.90.149

I'd like to place these two IP addresses in a bash array. To achieve that I tried the following:

n=$(grep -i ipaddress /opt/ipfile |  cut -d'=' -f2 | tr ';' ' ')

This results in extracting the values alright but for some reason the size of the array is returned as 1 and I notice that both the values are identified as the first element in the array. That is

echo ${n[0]}

returns 

10.78.90.137 10.78.90.149

How do I fix this?

Thanks for the help!

redirect shell bash
5 Answers

You can do this by using IFS in bash.

  • First read the first line from file.
  • Seoncd convert that to an array with = as delimeter.
  • Third convert the value to an array with ; as delimeter.

Thats it !!!

#!/bin/bash
IFS='\n' read -r lstr < "a.txt"
IFS='=' read -r -a lstr_arr <<< $lstr
IFS=';' read -r -a ip_arr <<< ${lstr_arr[1]}
echo ${ip_arr[0]}
echo ${ip_arr[1]}
user_5963700
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