separating line read from file by colon in a loop [duplicate]

Question

I'm trying to seperate the ip and port using a bash script. Below is what I have

my proxies.txt file

48.54.87.45:1000
48.54.87.45:1001
48.54.87.45:1002

My bash script

#!/bin/sh
input="proxies.txt"
while IFS= read -r var
do
  echo "$var"
  IFS=':' read proxy port <<< "$var"
  echo "$proxy"
  echo "$port"
  echo "---------------"
done < "$input"

But I get the following error

Syntax error: redirection unexpected

I have tested the loop and it does read the file one by one. It's the IFS line which is giving the error.

What have I done wrong?

And btw, make it while IFS=: read -r proxy port _ and you'll only need the one read. Or if you are going to do a full-line read, it's cheaper in terms of performance to do proxy=${var%%:*} and port=${port#*:} — Charles Duffy
– Charles Duffy, Commented Apr 13, 2018 at 19:36

2 revs · Accepted Answer · 2018-04-13 19:39:24Z

1

<<< is bash-only syntax. If you try to use it in a script run with /bin/sh (with either a #!/bin/sh shebang or run with sh scriptname), it will cause this error.

Start your script with #!/usr/bin/env bash, or another shebang that actually invokes bash.

edited Apr 13, 2018 at 19:39

community wiki

2 revs
Charles Duffy

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2 Comments

david Over a year ago

I already have that. I will edit my question

Charles Duffy Over a year ago

You edited the question to show /bin/sh. sh is the wrong shell. bash is the right one.

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