From: Stefan Karpinski <stefan.karpinski@gmail.com>
Date: Tue, 16 Dec 2008 06:35:53 GMT
Subject: Re: git-diff should not fire up $PAGER if there is no diff
Message-ID: <d4bc1a2a0812152235l14ec80bbr130a7ab152ad6b8@mail.gmail.com>
In-Reply-To: <20081216005658.GB3679@coredump.intra.peff.net>

> On Mon, Dec 15, 2008 at 7:56 PM, Jeff King <peff@peff.net> wrote:
>  2. detect EOF before starting the pager. We in fact already delay
>     running the pager in the forked process until we have some activity
>     on the pipe, but I don't know if there is a portable way of
>     detecting that that activity is EOF without performing an actual
>     read() call (which is undesirable, since it eats the first byte of
>     output that should go to the pager).

Wouldn't ungetc work? Or is that not portable enough? (It would only
work here because the EOF has to be the first character.)