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Re: Bash crashes on detaching Screen
From: |
Chet Ramey |
Subject: |
Re: Bash crashes on detaching Screen |
Date: |
Tue, 02 Dec 2014 14:44:52 -0500 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 |
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On 12/2/14, 12:59 PM, Darshit Shah wrote:
>> However, when I attempted the same from a virtual Terminal instead of an
>> emulator, upon remotely detaching the screen session, my terminal
>> directly displayed a login prompt again. This leads me to believe that
>> Bash did crash even then and caused the login prompt to reappear.
>>
>>
>
> I just recompiled my Bash with debugging symbols and attempted to run Bash
> under gdb. Here is the trace I received:
>
>
> [remote power detached from 19442.pts-1.mordor]
>
> Program received signal SIGHUP, Hangup.
The shell received SIGHUP, presumably sent by screen or the vty driver.
SIGHUP is a fatal signal; the shell catches it, cleans up, restores the
default signal handler, and resends SIGHUP to itself, which results in
bash exiting due to the SIGHUP.
This is not a bug.
- --
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/
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