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Re: dpkg -l needs wider package name output

On Tue, Apr 15, 2003 at 12:09:05AM +1200, Richard Hector wrote:
> On Mon, Apr 14, 2003 at 04:18:21AM +0100, Colin Watson wrote:
> > That's not true. What's actually happening is that, if COLUMNS isn't
> > set, dpkg looks at its stdout to see whether it's a terminal, and if it
> > is it tries to automatically detect the terminal size. When you pipe
> > dpkg's output to less stdout is not a terminal so the autodetection
> > fails.
> > 
> > In my own code I prefer to look at stdin rather than stdout to avoid
> > this issue.
> Isn't that even worse? That way if you were redirecting into a file,
> either directly or indirectly, you'd still have your program thinking
> it was talking to a terminal, and possibly screwing up the output (by
> setting output widths, colours etc).

Turns out the code I was thinking of checks isatty(0) && isatty(1) ("are
both stdin and stdout terminals?"), so that would solve that.


Colin Watson                                  [cjwatson@flatline.org.uk]

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