From: David King Landrith <dave@...>
Date: 2003-07-29T14:26:23+09:00
Subject: Re: How do I tell when my CLI output is piped?

Works perfect!  Thanks!

On Tuesday, July 29, 2003, at 12:54 AM, Harry Ohlsen wrote:

> David Landrith wrote:
>
>> ... I'd like to be able to automatically sense when the output is 
>> being piped to somewhere else, so that I can automatically make the 
>> report switch to a tab delimited format a la the mysql command line 
>> client.
>
> In C, this is normally done using the standard library routine 
> isatty(file_descriptor) which returns non-zero when output is going to 
> a terminal.
>
> Looking at the documentation for IO in pickaxe, there is an isatty() 
> method.
>
> So, I would imagine you can do something like (completely untested!) 
> ...
>
>   if $stdout.isatty
>       puts "Going to a terminal"
>   else
>       puts "Going somewhere else"
>   end
>
> Note that this would also include if you redirect the output to a file.
>
> Hope that helps.
>
> Harry O.
>
>
>
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David King Landrith
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   (h) 617.696.7133

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