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Re: read -e does not restore terminal settings correctly when interrupte

From: Chet Ramey
Subject: Re: read -e does not restore terminal settings correctly when interrupted if a trap is set
Date: Mon, 08 Sep 2014 14:46:25 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 9/7/14, 6:40 PM, address@hidden wrote:

> Bash Version: 4.3
> Patch Level: 24
> Release Status: release
> Description:
>       Given the following script (test.sh) :
>       #!/bin/bash
>       cleanup() { :; }
>       trap cleanup 0
>       read -e dummy
>       Run the script ('bash test.sh') *in ZSH* and when it waits for an input,
>       interrupt it with Ctrl-C.

Thanks for the report.  The problem is that bash doesn't clean up readline
and its terminal state in all cases that can result in its calling
longjmp() or exiting the shell.  I've attached a patch that should fix the

The problem doesn't manifest itself in bash because bash saves the terminal
state before a command runs and restores it when the command is terminated
by a signal.


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

Attachment: term-cleanup.patch
Description: Source code patch

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