Recent tty changes and snp
Poul-Henning Kamp
phk at phk.freebsd.dk
Sat Jun 12 07:15:10 GMT 2004
In message <20040611194808.GA55868 at 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 at 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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