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Date: Sun, 23 Aug 2009 16:12:18 -0400
From: Nathan Lay <nslay@comcast.net>
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To: Ed Schouten <ed@80386.nl>
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Cc: freebsd-current@FreeBSD.org, Jeremie Le Hen <jeremie@le-hen.org>
Subject: Re: truss(1) locked in kernel with 8.0-BETA2
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Ed Schouten wrote:
> * Nathan Lay <nslay@comcast.net> wrote:
>   
>> Instead of zeroing and setting master and STDIN_FILENO on the fd_set
>> every iteration, <snip>
>>     
>
> The current code doesn't zero the fdsets each iteration, only during
> startup:
>
> |  	FD_ZERO(&rfd);
> |  	for (;;) {
> |  		FD_SET(master, &rfd);
> | 		if (!nostdin)
> | 			FD_SET(STDIN_FILENO, &rfd);
>
>   
Ah right, I misread.  In any case, once 0 bytes are written to the 
master descriptor is that continually needed and does select() really 
need to continue to examine STDIN_FILENO?