[Cvs-mvs] Hello, and basic questions

[Terrence Enger]

At 10:45 2002-11-27 -0800, Wayne Johnson wrote:
>--- Terrence Enger <tenger@iseries-guru.com> wrote:
>> I am hacking cvs onto the iSeries.  cvs/mvs faces many of the same
>> issues
>> of code page translation that I am coming to terms with.  Perhaps we
>> can
>> help each other.
>
>If I remember from my AS/400 days (that is the iSeries, right?), you are

Right.

>correct about the ASCII/EBCDIC mapping.  Of more concern would be the use
>of stat/fstat to detect file sizes and times.  I'm sure they won't work
>right on the old style AS/400 libraries, only the HFS, and last I knew
>(and it was quite a while ago), the C/400 compiler didn't like the HFS. 

Hmm, I haven't noticed any problems with stat/fstat, but it is early days
yet.  My work deals strictly with the HFS; there is much code in source
physical files on 400's, and it would be really valuable to contol that
source with cvs, but I am nowhere near to dealing with that issue.  C/400
seems perfectly happy to work with files in the IFS now (V5R1 of OS/400).

>Since that time we've been using VisualAge/400 on NT, cross compiling for
>the 400 and we had no need for the port...  But your welcome to port it.
> 
>> (*)	Do you envisage being able to merge your changes back into the
>> "official" cvs source, or is this a permanent fork from the common code
>> base?
>
>I have discuessed this with the CVS developers, but they wanted to wait
>for CVS/MVS to be used by more people (a greater need) before merging. 
>That's one of the reasons for starting this mailing list, to find who was
>using CVS/MVS.
>

Ah, good.  The source changes in my own hack are more than I could expect
to introduce into the official source; I look forward very much to seeing
how you do things.

>> (*)	Have you tried to track the common code base since you started the
>> project?  What release of cvs would form the best basis for comparison
>> to
>> cvs/mvs?
>
>LetMeSee...  It's been over a year since I touched the code, so I'm a bit
>fuzzy.  This port was last updated to cvs_1_11_0.  Cvs is now at 1.11.1. 
>So there probably should be a merge of the 1.11.1 stuff to bring us
>current.  CVS does have the ability to identify changes made, so if you
>want to find what changes have been made between 1.11.0 and the cvsmvs
>branch it's as simple as a cvs diff command.

Actually, 1.11.2 was released last April, and there are ongoing changes in
the development source.

>
>> (*)	It is clear from Changes_390.txt that cvs/mvs runs in EBCDIC, and I
>> see
>> nothing there that I recognize as implementing translation between code
>> pages.  Are you using ASCII for the repository files and for
>> communication
>> between client and server?  Does the 390 do the translation
>> automagically?
>
>All network communications are done in UNIX format ASCII.  The client
>side does the translation (be it CR/LF<->NL or ASCII<->EBCDIC).  I
>originally used iconv to convert the code, but during one of the merges
>that got dropped in favor of the __atoe_? routines of MVS.  Probably
>should be put back to iconv.
>
>> (*)	How do you handle text files which are not ASCII?  (My hack does
>> not
>> deal with this.)
>
>CVS has the ability to identify binary files as having the -kb flag set. 
>If -kb is set, no translation occurs.

Okaaaay.  But the sources for cvs/mvs, for example, are in EBCDIC.  Can
cvs/mvs support both 390 and PC programmers working on these files?  I
think that the -kb flag would deliver an EBCDIC file to the PC programmer,
right?

>
>> (*)	cvs controls files and, to a lesser extent, directories.  Does the
>> 390
>> have other kinds of things which it would be useful to control, and
>> does
>> (or will) cvs/mvs do anything with them?  (My hack does not deal with
>> these.)
>
>MVS can use libraries called PDSs.  CVS/MVS does not handle these. 
>Probably similar to AS/400 libraries.

Yup.  Like I said, I see why that facility would be useful, but I have
almost no idea of how to accomplish it.

>
>> (*)	Is it appropriate to post attachments to this mailing list?
>
>I do not have attachments turned off, but please remember, this mailing
>list is based on a P166 (called Nexus) in my basement attached to a 640kb
>DSL line which I share with my wife and 3 teen age children who like to
>play interactive computer games and do lots of downloads.  Please be
>considerate.

I'll try to be considerate.  Anyway, perhaps I am flattering myself about
how much I may have to contribute.

>
>BTW, I just found that I hadn't copied over the CVS project file
>containing cvsmvs during my last upgraded.  So anyone who tried to check
>it out with cvs got a error.  I've fixed this and you should be able to
>check out the source directly.  See the web page for directions
>(cvsmvs.dccmn.com).  
>
>Good luck and keep in touch.

Thank you.  Please forgive me for running on.  It is a long time since I
had a chance to share my thoughts with anybody; no doubt I shall start to
run down soon.

>
>=====
>---
>Wayne Johnson,             | There are two kinds of people: Those 
>3943 Penn Ave. N.          | who say to God, "Thy will be done," 
>Minneapolis, MN 55412-1908 | and those to whom God says, "All right, 
>(612) 522-7003             | then,  have it your way." --C.S. Lewis
>
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