Date: Mon, 16 Nov 1998 17:37:14 -0500 From: Bakul Shah <bakul@torrentnet.com> To: Terry Lambert <tlambert@primenet.com> Cc: hackers@FreeBSD.ORG Subject: Re: Supporting more than FD_SETSIZE fd's Message-ID: <199811162237.RAA02348@chai.torrentnet.com> In-Reply-To: Your message of "Mon, 16 Nov 1998 21:09:41 GMT." <199811162109.OAA03119@usr08.primenet.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> > memcpy(tmp_readfds, readfds, fd_tablesize*sizeof(fd_mask)); > > int nfds = select(maxfd_in_use+1, tmp_readfds, 0, 0, timeout); > Right. > The problem that normally occurs in naieve net code is this: > cnt = getdtablesize(); > select( cnt + 1, ...) If you read carefully this is not what I am advocating. As in my example the first arg to select should be the highest fd in use + 1; *not* the highest fd that is allocatable (which, BTW, would be cnt - 1, not cnt!). > > Basically fd_set should have never been defined. > Definitely agree. But... it's *still* stupid to call select with > a count that includes unallocated descriptors. You are preaching to the converted :-) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199811162237.RAA02348>