[TUHS] Claim your early Unix contributions on GitHub
schily at schily.net
Wed Mar 30 23:44:20 AEST 2016
Diomidis Spinellis <dds at aueb.gr> wrote:
> On 30/03/2016 15:31, Joerg Schilling wrote:
> > Given that using git enforces a loss of meta data, is there a chance to get
> > the SCCS history for older UNIX versions?
> I've tried to incorporate the SCCS meta data in the Git commits. Where
> that was not possible I added a header-like line in the Git commit message.
> The BSD CSRG SCCS data are available on the four CD set compiled by
> Marshall Kirk McKusick https://www.mckusick.com/csrg/.
> I don't know of any other SCCS data openly available. If anyone has
> such data, I'd appreciate a copy.
I know of no other SCCS data, but let me make a remark that results from a
recent discussion with Kirk Mckusick:
Kirk told me that the regents of UCB do not like the unmodified (original) SCCS
history data to be published unless this is done with a written permission.
Currently only Kirk owns such a permission.
Kirk did however aks whether the GIT repo from CSRG would be OK as it contains
hand made fixes for a disk crash and as it does not use the original meta data.
The result was that there is no problem with a different archive format.
Given that the recent (upcomming **) SCCS history format (SCCSv6) is not the
original SCCSv4 format that was used in CSRG, it seems that using the hand
crafted fixed and a conversion to SCCSv6 would be OK as well.
The advantage with the SCCSv6 history format is that you are able to convert it
back to the SCCSv4 history format via:
sccs -R cvt -d -V4 .
I am planning a SCCSv6 variant of the CSRG archives, but I need to manually fix
the broken history files first. Note that this now may be a bit easier because
sccs -R val -T
gives better warnings since a few years than the historic sccs did.
Note that a full SCCS history may be very helpful. Last year, I came up with
some problems in the Bourne Shell and a SCCS history with delta comments from
around 1983 would have been very helpful to understand some changes that
I also recently was interested in knowing when waitpid() was introduced.
**) upcomming because support for project based commits and network support is
not yet ready in sccs.
See http://sccs.sourceforge.net/man/sccsfile.4.html for a description of the
SCCSv6 history format.
EMail:joerg at schily.net (home) Jörg Schilling D-13353 Berlin
js at cs.tu-berlin.de (uni)
joerg.schilling at fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/
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