netdev - Re: RFC: ss: improve horizontal output scaling

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Message-ID: <1443101279.29850.162.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 24 Sep 2015 06:27:59 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Phil Sutter <phil@....cc>
Cc:	Stephen Hemminger <stephen@...workplumber.org>,
	netdev@...r.kernel.org
Subject: Re: RFC: ss: improve horizontal output scaling

On Thu, 2015-09-24 at 14:36 +0200, Phil Sutter wrote:

> This is because TIOCGWINSZ returns 80 if the output is a pipe. 

Not exactly.

ss doesn't even call TIOCGWINSZ if output is a pipe.

Exact code is :

        screen_width = 80;
        if (isatty(STDOUT_FILENO)) {
                struct winsize w;

                if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) != -1) {
                        if (w.ws_col > 0)
                                screen_width = w.ws_col;
                }
        }


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