From mboxrd@z Thu Jan 1 00:00:00 1970 From: schily@schily.net (Joerg Schilling) Date: Wed, 04 Jan 2017 18:02:51 +0100 Subject: [TUHS] the guy who brought up SVr4 on Sun machines In-Reply-To: <20170104164630.GA3405@mcvoy.com> References: <20170104024127.GN12264@mcvoy.com> <20170104033512.GA22116@mcvoy.com> <586d234d.vf4JCu1Ye3gumwfc%schily@schily.net> <20170104164630.GA3405@mcvoy.com> Message-ID: <586d2abb.A5j4GovJtyzlD+AQ%schily@schily.net> Larry McVoy wrote: > > Note that the Svr4 kernel was derived from the SunOS-4.0 kernel. > > I was in the kernel group at Sun at the time. The pictures I posted > are of the guy that did the bring up. > > In no way was SVr4 even remotely derived from the SunOS 4.0 kernel. I cannot confirm this at all. I have access to both SunOS-4.x and Solaris sources and it is obvious that the SVr4 and Solaris kernel code is very similar. You could e.g. convert device drivers easily from SunOS-4.x to Solaris and I did this for my drivers. I remember one notable difference between SunOS-4.x and Svr4/Solaris: The kernel function as_hole() has been renamed to as_gap() on request from AT&T ;-) On the other side, the kernels SVr3 and SVr4 are very different and it is close to impossible to port a SVr3 device driver to SVr4. 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/