Date: Fri, 31 Oct 2003 14:29:59 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: andi_payn@speedymail.org Cc: freebsd-hackers@freebsd.org Subject: Re: O_NOACCESS? Message-ID: <20031031.142959.33240958.imp@bsdimp.com> In-Reply-To: <1067635232.825.202.camel@verdammt.falcotronic.net> References: <1067628015.825.64.camel@verdammt.falcotronic.net> <20031031.130229.132929054.imp@bsdimp.com> <1067635232.825.202.camel@verdammt.falcotronic.net>
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In message: <1067635232.825.202.camel@verdammt.falcotronic.net>
andi payn <andi_payn@speedymail.org> writes:
: > : Are there any other special devices like this in FreeBSD?
: >
: > Rewind units on tape drives? If there's no access check done, and I
: > open the rewind unit as joe-smoe? The close code is what does the
: > rewind, and you don't have enough knowledge to know if the tape was
: > opened r/w there.
Actually, it looks like there's a flags parameter passed to close,
which I think could be used to 'know'. No one uses it now.
: Thanks; that's a good example. Do you have an example of a specific
: driver so I can look at the code and see what would need to be done?
src/sys/cam/scsi/scsi_sa.c.
Warner
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