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From: allbery@ncoast.UUCP (Brandon Allbery)
Newsgroups: comp.unix.questions
Subject: Re: tty watcher
Message-ID: <4814@ncoast.UUCP>
Date: Wed, 31-Dec-69 18:59:59 EDT
Article-I.D.: ncoast.4814
Posted: Wed Dec 31 18:59:59 1969
Date-Received: Fri, 9-Oct-87 04:44:45 EDT
References: <4263@ozdaltx.UUCP> <15136@hi.UUCP> <1178@mtune.ATT.COM> <1310@mtune.ATT.COM> <28747@sun.uucp> <4763@ncoast.UUCP> <1196@bsu-cs.UUCP>
Reply-To: allbery@ncoast.UUCP (Brandon Allbery)
Followup-To: comp.unix.questions
Organization: Cleveland Public Access UN*X, Cleveland, Oh
Lines: 27

As quoted from <1196@bsu-cs.UUCP> by dhesi@bsu-cs.UUCP (Rahul Dhesi):
+---------------
| In article <4763@ncoast.UUCP> allbery@ncoast.UUCP (Brandon Allbery) writes:
| >I don't believe it -- *Minix* wins this round!!!  You see, the FS process,
| >which implements the file system, *is* a user mode process.  Yes, it is
| >loaded with the kernel, but it doesn't have to be...
| 
| Some clarification is needed here.  By "user mode" do you mean "not a
| part of the kernel"?  I don't think the 8086 CPU has a user mode and a
| privileged mode, so everything runs in user mode.
+---------------

Both -- my point with the SysV IPC comment is that it can be run as a process
on your big UNIX system as well.

All the FS process does is implement the semantics of a file system:  it takes
calls for filesystem functions and issues raw read/write "system calls" to the
kernel.  This fact is being used to write a networked file system for Minix,
based on PC/IP.  It could also be used to read "foreign" file systems; e.g.
MS-DOS, Xenix, or (unlikely but possible) even VMS.  [Writing the driver for
the Eagle would be a bit harder...]
-- 
	    Brandon S. Allbery, moderator of comp.sources.misc
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