Article 171536 of comp.os.vms:
In article <5ner5k$pig$1@news.isc.rit.edu>, glp5941@osfmail.isc.rit.edu (Greg Pratt) writes:
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> 
> I am having a problem using CLI$DCL_PARSE that I hope people here can help
> me with.  I haven't found a lot of sample code in the VMS documentation
> that's written in C.
> 
> I have written a test program in C (it's based on a real one that I was
> working on) that calls CLI$DCL_PARSE to figure out command-line qualifiers
> and parameters.  You can find the source for the example files (and brief
> instructions on how to put it together) at:
> 
>     http://www.rit.edu/~glp5941/vmstestfiles.txt
> 
> Here's the problem:  If I run the verb TEST with qualifiers that the CLD
> file says are correct, no problem.  But if I do something "illegal"
> ("TEST/PERM/TEMP" or "TEST/DUMMY" (/DUMMY isn't a recognized qualifier),
> CLI$DCL_PARSE() will print an error message, and then print a stack dump.
> Execution continues within my code, but I'm trying to figure out why
> CLI$DCL_PARSE() would produce a stack dump without being told explicitly to
> do so (a la SYS$SIGNAL()).
> 
> I am compiling this with DEC C on an AXP system running VMS 6.2-1H3.
> 
> What am I missing here?

The CLI$ routine is signalling the error,  In this case, most probably the
warning: CLI$_IVQUAL.  This "signalling" nature of the CLI$ routine is the
default action and can not be turned off.

What I've done in the past is to create a special condition handler that
will recognize the CLI facility errors and output them as error messages
and dismiss the condition if I want to remain within the program.  There
is an example of this in an old version of my SYMBOL program available
from FTP.WKU.EDU.

I suspect that you could get away with simply declaring LIB$SIG_TO_RET as
a condition handler in your program.  Because you say you wrote this with
"C", I'm supplying the following simple ditty to demonstrate.  This ditty
calls CLI$DISPATCH.  You could build a similar "jacket" routine around the
other CLI routines:  CLI$DCL_PARSE, CLI$PRESENT and CLI$GET_VALUE

#include <cli$routines.h>
#include <lib$routines.h>
#include <stdio>

unsigned long cli_dispatch();

main()
  {
        unsigned long status;

        printf("calling cli()\n");
        status = cli_dispatch();
        printf("called cli()\n");

        return( status );
  }

unsigned long cli_dispatch()
  {
        lib$establish( lib$sig_to_ret );
        return ( cli$dispatch() );
  }


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VAXman-                                                     VAXman@TMESIS.COM

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