Date: Sat, 12 Jun 2004 09:14:42 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Dan Nelson <dnelson@allantgroup.com> Cc: current@freebsd.org Subject: Re: Recent tty changes and snp Message-ID: <77506.1087024482@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 11 Jun 2004 14:48:09 CDT." <20040611194808.GA55868@dan.emsphone.com>
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In message <20040611194808.GA55868@dan.emsphone.com>, Dan Nelson writes: > >I think the snp device got left out of the recent struct tty changes; I >get the following panic when running "watch -W /dev/sometty" and typing >a character. Read-only watching a tty also causes a panic when I start >typing on the real tty. This is not intentional breakage, but it may be unavoidable breakage :-( Snoop(4) is great functionality and I would have killed to have it several times along my career, unfortunately its implementation is a POS. I'm currently pondering using bpf(4) for the task instead, but the uneven layering of the tty layer has not offered me a clearcut place to stick the code yet. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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