From mboxrd@z Thu Jan 1 00:00:00 1970 From: schily@schily.net (Joerg Schilling) Date: Wed, 11 Jan 2017 23:57:51 +0100 Subject: [TUHS] the guy who brought up SVr4 on Sun machines In-Reply-To: References: <79091EE2-D7F8-4BE2-9422-47C365780367@berwynlodge.com> <587509e1.gGhkbfCz1YmUYkqT%schily@schily.net> Message-ID: <5876b86f.TZmh44N+Iwm79UKO%schily@schily.net> Dan Cross wrote: > On Tue, Jan 10, 2017 at 11:20 AM, Joerg Schilling wrote: > > > Berny Goodheart wrote: > > [snip] > > > VFSSW <=== NO, this is from SunOS-4 > > > > Surely Berny meant the file system switch here, which could have come from > early system V, but originated in research Unix (8th edition?). Note that > this list is very similar to that in the early part of his book on System V > internals. It is rather a part of the VFS interface that has first been completed with SunOS-3.0 in late 1985. There are small changes introduced into the VFS switch for SVr4 to permit to mount special filesystems without the need of root permissions. They cause the major differences between SunOS-4 and Svr4. VFS uses two interface parts: - the VFS switch with the vfs interface functions to mount a filesystem and to stat it - the VFS vnode interface with the vnode interface functions to hold the interfaces like open(), mmap(), ... Jörg -- EMail:joerg at schily.net (home) Jörg Schilling D-13353 Berlin joerg.schilling at fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/ URL: http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/