Dumping Large Binary Buffer Through Sysctl

[Poul-Henning Kamp]

In message <5D267A3F22FD854F8F48B3D2B523819339364836FC at IRVEXCHCCR01.corp.ad.bro
adcom.com>, "David Christensen" writes:

>I'm looking for a way to dump a large binary debug buffer=20
>in a driver to a file.  I've currently implemented this
>with SYSCTL_ADD_OPAQUE() and it works fine but running the
>"sysctl -a" command causes this buffer to be dumped which
>is something of a pain.  Is there a better way to do this?

Much better idea:  memory map it, that way your driver does
not even discover that userland peeks over its shoulder.

-- 
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.