linux-tutorial/codes/shell/示例脚本/输入和输出/创建自己的重定向/创建输入文件描述符.sh

#!/bin/bash

# redirecting input file descriptors

exec 3>&1
echo "This is the 3 file descriptor" >&3

exec 6>&0
exec 0< test

count=1
while read line
do
    echo "Line #$count: $line"
    count=$[ $count + 1 ]
done
exec 0<&6
read -p "Are you done now?" answer
case $answer in
    Y | y) echo "Goodbye" ;;
    N | n) echo "Sorry, this is the end" ;;
esac