Question

I want to be able to toggle between redirects. ie:

Redirect #1 would be:
Don’t redirect to stdout, Redirect the output to a file.

Redirect #2 would be:
Don’t redirect to file… rather redirect to stdout

Is it possible to do this at runtime?

Answer 1

Here it goes for bash (for C it would be pretty the same):

#!/bin/bash

echo begin experiment

exec 3>&1-

exec > to_file

echo this goes to file
echo another line to file

exec 1>&3-

echo this goes again to stdout