Date: Fri, 30 Jul 1999 12:33:39 -0700 From: Mike Smith <mike@smith.net.au> To: Warner Losh <imp@village.org> Cc: Mike Smith <mike@smith.net.au>, Mike Smith <msmith@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.sbin/apm apm.c Message-ID: <199907301933.MAA00684@dingo.cdrom.com> In-Reply-To: Your message of "Fri, 30 Jul 1999 13:11:25 MDT." <199907301911.NAA83225@harmony.village.org>
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> In message <199907301843.LAA00424@dingo.cdrom.com> Mike Smith writes: > : I'm not entirely sure yet about the ramifications of user-space code > : being able to call the BIOS; there are security and locking implications > : that I want to consider, and a good case for a more generalised > : interface. > > What are the security implications? Only root or group operator, by > default, can do this. Only root can use the bpf device, yet there are screams of protest every time people talk about that too. > Your point about the locking mechanism is well > taken. Nothing else is doing any locking, so the same problem exists > with the information interface. I'm looking at a "bios lock" that should be fairly straightforward to implement; it needs to cover the vm86 stuff as well, as there are several ways into the BIOS. > I'm not sure why you say that it can't work. It is just using the > same mechansim that the the get information stuff is using... Data > structures in memory aren't supported accross this interface... It wouldn't work because the arguments to the BIOS connector changed; it wasn't too hard to copy them back and forth from the "old" ones. > : APM should also become a module (real soon now), which will take the > : pressure off on any "vendor specific" features as well; so far we don't > : actually support anything "vendor specific" anyway, so it's a bit of a > : furphy right now. > > Right now there are a couple of information producing programs that > use this interface. Where? -- \\ The mind's the standard \\ Mike Smith \\ of the man. \\ msmith@freebsd.org \\ -- Joseph Merrick \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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