Not everybody uses POSIX ACLs on Linux. In fact, most users olympically ignore them, even when they're aware of what they are and what they do. But most distributions come with support for them. Some leave them enabled for the default filesystems; some don't.
My question is, is there an efficient way to search for files that use POSIX ACLs in a filesystem -- that is, ACLs other than the so-called minimal ACLs, the familiar rwx for user-group-other -- except painstakingly parsing the output of
getfacl ran through