shell pipeline to reverse the order of lines.
Oliver Laumann
net at opal.cs.tu-berlin.de
Fri Mar 1 19:53:29 AEST 1991
In article <19079 at rpp386.cactus.org> jfh at rpp386.cactus.org (John F Haugh II) writes:
> >Considering that the `tail' command under vanilla BSD (at least 4.2 and
> >4.3 BSD) has this `feature' I wouldn't call it non-standard. After all,
> >`tail' is a BSD command.
>
> What would you prefer to call a feature which does not exist on all
> systems that have the command?
A vendor is free to put a version of `ls' on their UNIX port that
doesn't support the -l option any longer. Does this make `ls -l'
non-standard? Certainly not.
> What would you prefer to call a command which may not exist on all systems?
The fact that it may not exist on *all* systems is irrelevant. I'm sure
that for almost any UNIX command (except maybe date, ls, etc.) you will
be able to find a system where this command does not exist.
> As for being a ``BSD'' feature, I've yet to see a UNIX system without
> the command,
Why do you think `tail' is under /usr/ucb (on those systems that have
a /usr/ucb)? If the commands under /usr/ucb are not BSD commands,
then what *is* a BSD command?
--
Oliver Laumann net at tub.cs.tu-berlin.de net at tub.UUCP net at pogo.ai.mit.edu
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