Script to copy stdin to stdout and stderr since it's not easily possible in bash

in2outerr.py

#!/usr/bin/python3 -u
"""
Script to copy stdin to stdout and stderr since it's not easily possible in bash

Example usage:
  
  # This will download a page and discard it (but it could be saved)
  #  and pipe the progress for further processing
  # It'll still be visible thanks to in2outerr.py
  #  but tr will still be able to process it
  curl https://duckduckgo.com 2>&1 >/dev/null | ./in2outerr.py | tr -s " " "," > /tmp/progress
  
"""


import sys

try:
    # Why 64 bytes? I dunno, it seems to work better than small numbers like 1,2,3,4
    # Maybe somebody else know's why
    input = sys.stdin.buffer.read(64)

    while input:
        sys.stdout.buffer.write(input)
        sys.stderr.buffer.write(input)
        input = sys.stdin.buffer.read(64)
except KeyboardInterrupt:
    pass