Date: Wed, 6 Jan 1999 15:51:23 -0800 (PST) From: Doug White <dwhite@pond.net> To: Graham Wheeler <gram@cdsec.com> Cc: hackers@FreeBSD.ORG Subject: Re: bpf select() broke? Message-ID: <Pine.BSF.3.96.990106154927.22525A-100000@guppy.pond.net> In-Reply-To: <199901060852.KAA00920@cdsec.com>
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On Wed, 6 Jan 1999, Graham Wheeler wrote: > > Do Berkeley packet filter devices (/dev/bpfX) supposed to respond like > > normal files and devices to a select() system call? > > > > My experimentation (based on 2.2.7-RELEASE) shows that they don't. They > > don't return when they have data waiting to read and they don't return > > when they're ready to be written to. The bpf fd is definitely in the fd > > list going into the select(), so don't try to pin pilot error on this one. > > We use select on read on BPF devices for all our BPF code on 2.2.7, and it > works for us. Select on write definitely doesn't work (it isn't implemented). Select on write doesn't work, eh? I'll try that. Thanks for the information! Doug White | Pacific Crest Networks Internet: dwhite@pond.net | http://www.pond.net/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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