#! /bin/bash -
# https://unix.stackexchange.com/questions/290696/display-stdout-and-stderr-in-two-separate-streams
# 
# This script will run binwalk in a split screen, displaying results in the top screen and debug output in the bottom screen.
# The `screen` utility must be installed.

# If BINWALK_PATH is not set, assume it is in the default cargo target path
if [[ -z "${BINWALK_PATH}" ]]; then
    BINWALK_PATH="$(cd "$(dirname $0)" && pwd)/../target/release/binwalk"
fi

# If no RUST_LOG level is defined, default to `info`
if [[ -z "${RUST_LOG}" ]]; then
    export RUST_LOG=info
fi

tmpdir=$(mktemp -d) || exit
trap 'rm -rf "$tmpdir"' EXIT INT TERM HUP

FIFO=$tmpdir/FIFO
mkfifo "$FIFO" || exit

conf=$tmpdir/conf

cat > "$conf" << 'EOF' || exit
split -h
focus
screen -t stderr sh -c 'tty > "$FIFO"; read done < "$FIFO"'
focus
screen -t stdout sh -c 'read tty < "$FIFO"; eval "$CMD" 2> "$tty"; echo "[Command exited with status $?, press enter to exit]"; read prompt; echo done > "$FIFO"'
EOF

CMD="$BINWALK_PATH $*"

export FIFO CMD

screen -mc "$conf"