[Bryanw92]

Modern day hipsters “discovering” something that DOS users did 30 years ago. LOL

[zeugma]

Modern day hipsters “discovering” something that DOS users did 30 years ago. LOL

You can set return codes in DOS?

I use a variant similar to what shadowace posted...
VM:~/CHANGES :) echo $PS1
VM:\w `if [ $? = 0 ]; then echo :\\); else echo :\\(; fi`
VM:~/CHANGES :)