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Re: ed: p and pppppp same
From: |
Paul Eggert |
Subject: |
Re: ed: p and pppppp same |
Date: |
Tue, 28 Sep 2004 17:08:30 -0700 |
User-agent: |
Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux) |
Dan Jacobson <address@hidden> writes:
> In ed(1),
> pppppppppppp
> and
> p
> do the same thing, print one line.
In traditional ed, "p" and "pp" both print one line,
and "ppp", "pppp", etc. are errors.
POSIX requires support for both "p" and "pp", and
deliberately doesn't specify whether "pp" writes
the line once or twice.
So, the GNU behavior is a compatible extension to traditional
behavior, and conforms to POSIX here.
I'm not sure whether all this mess is worth documenting. ed hasn't
changed for 10 years, and I'm not sure who's maintaining it now, if
anybody.
- Re: ed: p and pppppp same,
Paul Eggert <=