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

[Peter 'EPLAN' LANGSTOeGER]

In article <7lgd8vF3e3ad2U1 at mid.dfncis.de>, js at cs.tu-berlin.de (Joerg Schilling) writes:
>In article <4af3051e$1 at news.langstoeger.at>,
>Peter 'EPLAN' LANGSTOeGER <peter at langstoeger.at> wrote:
>>In article <7lg60tF3e2em8U1 at mid.dfncis.de>, js at cs.tu-berlin.de (Joerg Schilling) writes:
>>>I don't know what has been tested in 1992. Today, it is impossible for VMS
>>>to get UNIX branding as long as system() does not call a POSIX shell but
>>>the VMS command line interpreter. open(2) may be another problem.
>>
>>Are you sure about that?
>>Is system() always calling DCL or does it perhaps depend on the user's
>>UAF setting (CLI: DCL) and so this road block would be non existing
>>(if correctly configured - btw what would this be CLI: PSH or CLI: BASH)?
>
>Sorry, but I don't understand your explanation. It did always call DCL.
>How do you believe, I could change this?

Look at this:

$ aut s user
Username: USER                             Owner:  Nonprivileged Test User
Account:                                   UIC:    [375,375] ([USER])
CLI:      DCL                              Tables: DCLTABLES
...

There in the UAF is specified the default Command Line Interpreter for
this particular account. So if you SPAWN a subprocess and do not specify
explcitely a CLI via the /CLI qualifier then the CLI is selected implicitely
(from the UAF I assume). A system() is AFAIK implemented like a SPAWN, so
the CLI setting in the UAF is taken (as one probably can't select the CLI
with the system() call).

Do you assume, that the CLI is derived from the parent process?
And it yes, did you really *change* the CLI for your tests (or did you
simply run BASH from your process - with DCL CLI - and started a program
which called then the system() service)?


Note: I haven't done any tests with BASH or C or POSIX/GNV regarding this!
So, I don't know how to *replace* the CLI in the UAF for a user.
Obviously, there is no SYS$SYSTEM:PSH.EXE or SYS$SYSTEM:BASH.EXE or
any other U**X shell for simply using it in UAF or SPAWN/CLI= command.
I only know of a $GNU:[BIN]BASH.EXE which is usually started within DCL...

And to top it, what to do with the "Tables: DCLTABLES" parameters
(if you succeed replacing the CLI with a unixy one written for use in UAF)


In other words, I don't know how to get a shell into UAF (as I so far
never had any interest in), but currently I simply doubt that system()
*always* call DCL (which is what you wrote). One may prove me wrong ;-)
Maybe one experienced with UNIX shells on VMS could answer this...

-- 
Peter "EPLAN" LANGSTÖGER
Network and OpenVMS system specialist
E-mail  Peter at LANGSTOeGER.at
A-1030 VIENNA  AUSTRIA              I'm not a pessimist, I'm a realist