happily: adv. Of software, used to emphasize that a program is unaware of some
important fact about its environment, either because it has been fooled
into believing a lie, or because it doesn't care. The sense of
‘happy’ here is not that of elation, but rather that of
blissful ignorance. “The program continues to run, happily unaware
that its output is going to /dev/null.” Also used to suggest that a
program or device would really rather be doing something destructive, and
is being given an opportunity to do so. “If you enter an O here
instead of a zero, the program will happily erase all your data.”
Nevertheless, use of this term implies a basically benign attitude towards
the program: It didn't mean any harm, it was just eager to do its job. We'd
like to be angry at it but we shouldn't, we should try to understand it
instead. The adjective “cheerfully” is often used in exactly
the same way.