bash_prompt.sh

#!/bin/bash

# ANSI color codes
RS="\033[0m"    # reset
HC="\033[1m"    # hicolor
UL="\033[4m"    # underline
INV="\033[7m"   # inverse background and foreground
FBLK="\033[30m" # foreground black
FRED="\033[31m" # foreground red
FGRN="\033[32m" # foreground green
FYEL="\033[33m" # foreground yellow
FBLE="\033[34m" # foreground blue
FMAG="\033[35m" # foreground magenta
FCYN="\033[36m" # foreground cyan
FWHT="\033[37m" # foreground white
BBLK="\033[40m" # background black
BRED="\033[41m" # background red
BGRN="\033[42m" # background green
BYEL="\033[43m" # background yellow
BBLE="\033[44m" # background blue
BMAG="\033[45m" # background magenta
BCYN="\033[46m" # background cyan
BWHT="\033[47m" # background white

function color(){
    LC=$?
    if [[ $LC != 0 ]]; then
	echo -e $BRED$FBLK
    else
        echo -e $FGRN
    fi
}
function reset(){
    echo -e $RS
}
PS1='$(color)[\u@\h \W]\\$$(reset) '