Does BSD ls(1) support "--time=ctime --time-style=full-iso"?
BSD ls does not support any --longopts. Looking at the man page, I don't see "millisecond" or "subsecond" etc. mentioned, though I could easily be missing it. E.g., https://man.freebsd.org/cgi/man.cgi?ls Even if there is such an option, I am skeptical of how portable it would be, or trying to discern whether it is really working or not. All the evidence so far is that it is very difficult to determine whether subsecond mtimes are sufficiently supported or not. Speaking in general, I don't think trying to get into system-specific behaviors, of whatever kind, is going to help. --thanks, karl.
