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Re: Race condition in read -t

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On 8/28/15 7:52 PM, Oleg Popov wrote:

> Description:
> 	Function reset_alarm() in read.def first resets SIGALRM handler and
> 	then cancels alarm. Sometimes, SIGALRM comes between those 2 calls and
> 	crashes (sub)shell.
> 
> Repeat-By:
> 	while sleep 0.00$RANDOM; do echo test; done | while true; do read -t 0.00$RANDOM; echo $REPLY; done
> 	(usually takes a few seconds to crash, sometimes minutes)
> 
> Fix:
> 	Swap the lines in reset_alarm().

Thanks for the report.  This will be fixed in the next release of bash.

-- 
``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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Re: Race condition in read -t Chet Ramey <chet.ramey@case.edu> - 2015-08-31 09:25 -0400

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