[Info-vax] Looking into C-include files on VMS

[John Wallace]

On Nov 5, 10:15 pm, billg... at cs.uofs.edu (Bill Gunshannon) wrote:
> In article <baOjfZKhG... at eisner.encompasserve.org>,
>         koeh... at eisner.nospam.encompasserve.org (Bob Koehler) writes:
>
> > In article <7ld3naF3d1ka... at mid.individual.net>, billg... at cs.uofs.edu (Bill Gunshannon) writes:
> >> In article <hcrfk0$bt... at naig.caltech.edu>,
> >>        glen herrmannsfeldt <g... at ugcs.caltech.edu> writes:
>
> >>> I presume VMS has some way to share data when needed, though.
>
> >> None that I have ever seen.
>
> >    You haven't seen mmap()?  Or $CRMPSC?  Or an installed, writable
> >    section?
>
> The discussion was about fork(), not mmap().  The sharing done between
> forked processes is, as far as I know, not possible under VMS.  That
> is, there is no way for two processes to both have the ability to
> read/write the exact same variables and devices.  Unix fork() does
> this precisely.  For an easy to understand example, just take a look
> at the source to the connect portion of  UXKermit.  The program opens
> a serial device, forks and then one process handles input from the
> serial port while another process handles output thru that same serial
> port.  Can two totally separate processes under VMS both access a single
> serial port simultaneously?
>
> bill
>
> --
> Bill Gunshannon          |  de-moc-ra-cy (di mok' ra see) n.  Three wolves
> billg... at cs.scranton.edu |  and a sheep voting on what's for dinner.
> University of Scranton   |
> Scranton, Pennsylvania   |         #include <std.disclaimer.h>  

"The sharing done between forked processes is, as far as I know, not
possible under VMS"

You haven't been paying attention have you Bill. Just because your
VMSworld never saw the capability doesn't mean that it didn't exist in
the broader world of VMS. The rest you will have to sort out for
yourself.