gistfile1.sh

#!/bin/bash

_set_prompt () {

	local exit=$?

	#local black="30";
	#local grey="31";
	local red="31";
	local green="32";
	local yellow="33";
	#local blue="34";
	#local purple="35";
	local cyan="36";
	local white="37";

	local pre="\[\e[";
	local suf="\]";
	
	# public values
	GREEN="${pre}0;${green}m$suf";
	#BLUE="${pre}0;${blue}m$suf";
	CYAN="${pre}0;${cyan}m$suf";
	WHITE="${pre}0;${white}m$suf";
	#BWHITE="$pre$white;1m$suf";
	BRED="$pre$red;1m$suf";
	#YELLOW="${pre}0;${yellow}m$suf";
	BYELLOW="$pre$yellow;1m$suf";
	
	NORMAL="\[\e[0;0m\]"

	local u;
	local p;
	
	if [ "$UID" = "0" ]; then
		u="$BRED\u$NORMAL";
		p="$BRED#$NORMAL";
	else
		u="$BYELLOW\u$NORMAL";
		p="%";
	fi

	_prompt="[$WHITE\h$NORMAL:$CYAN\w$NORMAL] $u $p ";
}
	
_update_prompt () {

	local exit="$?"	
	local bul="\342\200\242" # bullet character

	case "$exit" in
		"0" )	ex="$GREEN$bul$NORMAL " ;;
		*	)	ex="$BRED$bul$NORMAL " ;;
	esac


	export PS1="$ex$_prompt";
	

}

_set_prompt

PROMPT_COMMAND='_update_prompt'