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Re: bizarre trap behavior while reading a file

From: Chet Ramey
Subject: Re: bizarre trap behavior while reading a file
Date: Mon, 28 Mar 2011 11:45:44 -0400
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On 3/28/11 11:39 AM, tytus64 wrote:

>> There is a bash process that is forked to execute the `while read ...'
>> in the first pipeline loop.  It has to hang around the whole time, so it
>> can run the while loop and exit with the correct status.  If you send it
>> a SIGHUP with `killall bash', it will exit.
> Thanks for all the answers. I think I understand the problem now. I wonder
> though if there is any way to disable default HUP handling int the
> subprocess executing the loop?

Sure.  Trap it to SIG_IGN: `trap "" SIGHUP'.

``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/

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