如何使用bash将stdout传送到脚本并写入终端？

Question

I would like to pipe the output of a job to a script to read in that stdout lines and complete actions and display the output on the terminal.

Right now, I have this..

ls | ./script.sh

This allows my script to be run on the output, but does not display the result of ls on the terminal.

I have tried this:

ls | tee ./script.sh

but this overwrites the contents of script.sh with the output from ls.

How can I show the output of "ls" on my terminal, and run the contents on script.sh over that input? Here is an example of what my script.sh looks like:

#!/bin/bash
while read line
  do
    echo line input
  done

Answer 1

You can do:

 ls | tee /dev/tty | ./script.sh

or, if you want to use exactly what stdout was before the piping, you can do something like:

{ ls | tee /dev/fd/3 | ./script.sh ; } 3>&1 #(3 is an semi-arbirtrary choice of fd)