netdev - Re: [iproute PATCH v2 4/4] lib: Enable colored output only for TTYs

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Date:   Wed, 15 Aug 2018 10:24:31 -0600
From:   David Ahern <dsahern@...il.com>
To:     Phil Sutter <phil@....cc>,
        Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org, Till Maas <opensource@...l.name>
Subject: Re: [iproute PATCH v2 4/4] lib: Enable colored output only for TTYs

On 8/15/18 10:21 AM, Phil Sutter wrote:
> Add an additional prerequisite to check_enable_color() to make sure
> stdout actually points to an open TTY device. Otherwise calls like
> 
> | ip -color a s >/tmp/foo
> 
> will print color escape sequences into that file. Allow to override this
> check by specifying '-color' flag more than once.
> 
> Signed-off-by: Phil Sutter <phil@....cc>
> ---
> Changes since v1:
> - Allow to override isatty() check by specifying '-color' flag more than
>   once.

That adds overhead to my workflow where I almost always have to pipe the
output of ip to a pager.