I have a bash script that gets some input as stdin. After processing, I copy a file using "-i" (interactive). However, this never gets executed since (I guess) standard input has not been flushed. To simplify with an example:

#!/bin/bash
while read line
do
    echo $line
done
# the next line does not execute 
read -p "y/n" x
echo "got $x"

Place this in t.sh, and execute with: ls | ./t.sh

The read is not executed. I need to flush stdin before the read. How could it do this?