Re: lib/52517: TTY settings modified and not restored on exit.

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR lib/52517; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, lib-bug-people%netbsd.org@localhost, 
	gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: lib/52517: TTY settings modified and not restored on exit.
Date: Fri, 1 Sep 2017 03:35:12 -0400

 On Aug 31,  9:50pm, jhdub23%gmail.com@localhost (jhdub23%gmail.com@localhost) wrote:
 -- Subject: lib/52517: TTY settings modified and not restored on exit.
 
 | >Number:         52517
 | >Category:       lib
 | >Synopsis:       TTY settings modified and not restored on exit.
 | >Confidential:   no
 | >Severity:       non-critical
 | >Priority:       medium
 | >Responsible:    lib-bug-people
 | >State:          open
 | >Class:          sw-bug
 | >Submitter-Id:   net
 | >Arrival-Date:   Thu Aug 31 21:50:00 +0000 2017
 | >Originator:     Jay West
 | >Release:        libedit (NetBSD-current)
 | >Organization:
 | Self
 | >Environment:
 | Linux [deleted] 2.6.32-696.6.3.el6.x86_64 #1 SMP Wed Jul 12 14:17:22 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
 | >Description:
 | libedit modifies TTY settings when used, and does not have a mechanism to fully save and restore TTY settings.  This causes problems when libedit is used as a GNU readline replacement.
 | 
 | Specifically, after running python+GnuReadline, TTY settings are untouched after python exits.  However, python+libedit has noticeable TTY changes after python exits.
 | 
 | This will be true for any application linked against libedit instead of GnuReadline.
 | >How-To-Repeat:
 | % stty -a > orig.txt
 | % python # Run python compiled with libedit, and immediately exit (or any application using libedit).
 | % stty -a > after.txt
 | % diff orig.txt after.txt  # Differences exist
 | 
 
 
 Can you provide a small program that calls readline and reproduces this?
 
 christos