Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!batcomputer!itsgw!steinmetz!uunet!auspex!guy
From: guy@auspex.UUCP (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: sorting and reversing lines of a file
Keywords: reverse file
Message-ID: <1082@auspex.UUCP>
Date: 26 Feb 89 22:41:51 GMT
References: <9056@burdvax.PRC.Unisys.COM> <9510@smoke.BRL.MIL> <899@auspex.UUCP> <2585@pegasus.ATT.COM> <1774@dlvax2.datlog.co.uk> <962@philmds.UUCP>
Reply-To: guy@auspex.UUCP (Guy Harris)
Organization: Auspex Systems, Santa Clara
Lines: 7

>All you need is a smart cat ( :-); this one will probably do an
>fstat(2) (on 1), which not all Unixes (Unices ?) support.

What is it that not all UNIXes support?  All the ones I know of support
"fstat", and both 4.xBSD and S5 (and, as I remember, all versions going
back to V7) supported "cat" checking whether its output was the same
file as any of its inputs.