List all flags of a file?

On OS X 10.8, this is ls -lO now (with a capital O). The output from man ls:

-O      Include the file flags in a long (-l) output.
-o      List in long format, but omit the group id.

I assume you are talking about FreeBSD - from man ls:

 -o      Include the file flags in a long (-l) output.

So ls -lo should list all the file flags on FreeBSD.