Show command output while redirecting stdout/stderr to files

tee2.sh

#!/bin/bash

# Like tee, but redirect both stdout and stderr to different files.
#
# Example: exec_and_tee2 file-with-stdout.txt file-with-stderr.txt find / -maxdepth 1 -type d
exec_and_tee2() {
    local stdout=$1 stderr=$2
    shift 2
    { "$@" > >(tee "$stdout"); } 2> >(tee "$stderr")
}