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Re: [Bug-readline] [PATCH] Gnuplot on macOS does not suspend by Control-

From: Chet Ramey
Subject: Re: [Bug-readline] [PATCH] Gnuplot on macOS does not suspend by Control-z
Date: Tue, 21 Nov 2017 14:36:34 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

On 11/21/17 7:53 AM, Rin Okuyama wrote:
> Hi,
> Gnuplot on macOS does not suspend by Control-z in its command line.
> Please find the details below and attached patch.

Does GNUplot install a handler for SIGTSTP or ignore it? The behavior
you describe, in the absence of any other changes, sounds like something
sets the DSUSP character to ^Z.

> At the moment, readline does not disable VSUSP, and expect SIGTSTP to
> be appropriately sent by the tty driver. However, unfortunately, it
> does not work on macOS.

It must be something specific to GNUplot, since the simple readline test
programs handle ^Z as expected when run on MacOS.

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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