Yep, that's what happens when you don't offer the OS you're talking about It's also why I'll typically note which OS I'm offering the answer for. Technically you should be able to get GNU/grep for the major OSs' (like sunfreeware.com).

My Sun boxes aren't up and I don't want to VPN to work and check out the HP-UX or AIX boxes I have available to me for this question. If it's still up when I get back on-line to work tomorrow, I'll check them as well.

Carl