Hi, >>Sure. But doesn't the i-list say if a file is executable? >>("ii its protection bits") >> > According to [ruby-talk:41558], Mac OS X seems to use suffixes > to say executable. AFAIK, Mac OS X is quite Unix-like, being based on Darwin, which is Mach, BSD, etc. It has chmod, chown and all. http://developer.apple.com/unix/index.html : "Mac OS X and the Power of UNIX Beneath the appealing, easy-to-use interface of Mac OS X, you'll find an industrial-strength, UNIX-based foundation called Darwin. This open source core of Mac OS X is highly stable and built on mature technology: * A Mach 3.0 kernel with support for symmetric multiprocessing. * Based on 4.4BSD with networking from FreeBSD 3.2. * Support for most POSIX APIs. * Popular UNIX development tools such as gcc, gdb, vi, emacs, pico, Perl, etc. * Popular UNIX shell tools such as grep, chmod, ps, crontab, top, tail, etc." History: http://developer.apple.com/darwin/history.html Mac OS X man pages: http://www.osxfaq.com/MAN/Index/A.ws http://www.hmug.org/man/1/1.html If I just could afford a Mac ... :) Tobi -- http://www.pinkjuice.com/