Charles Mills wrote:
Trying to figure out this subject.
The C/C++ Language Reference on p. 207 says "Under z/OS batch . argv[0]
Returns the program name in uppercase argv[1 to n] Returns the arguments as
you enter them." Not the most useful documentation - I don't think "as you
enter them" is terribly clear as it pertains to z/OS batch.
Well, you normally get an integer which contains the number of
subsequent arguments:
void main(int argc, char *argv[]);
'argc' is the traditional name used for a variable to hold
the first value, and argv the traditional name for the
second value; the second value is an array of words, each
word presented as a separate element in the array, in the
case you entered it on the PARM= parameter on the EXEC
statement. Actually, each argument is a pointer to the
corresponding word. As you noted, argv[0] contains the
program name.
A 'word' is delimited by blanks; leading and trailing spaces
are stripped off. In this list of words, each is terminated
by a null (x'00).
The C/C++ User's Guide on p. 70 says "When NOARGPARSE is in effect,
arguments on the invocation line are not parsed, argc has a value of 2, and
argv contains a pointer to the string."
Right. argv[0] is still the program name; argv[1] is the unparsed
parm string as entered on the EXEC statement.
Question: Does anyone know if a NOARGPARSE C++ program called via LINK or
ATTACH would receive parm 2 - the second word pointed to by R1 - anywhere?
Is there a recommended way to do this?
Well, I don't do C++, but some notes for C below:
What I'd like to end up with is a C program that "did me no favors" - if
invoked from JCL EXEC, then argv[1] would point to the PARM= string if any
("as is") and if called via LINK or ATTACH would get the vector pointed to
by the caller's R1 as argv[1, 2, 3 .].
Since C programs are LE-based, why not use the LE callable service CEE3PRM?
_VSTRING p_mess;
char char_work [88];
char * p_ptr;
...
CEE3PRM(char_work, &fc);
strcpy(p_mess.string, "Parm = ");
p_ptr = strcat(p_mess.string,char_work);
p_mess.length = 87;
CEEMOUT(&p_mess, &dest, &fc);
(well, one reason is that CEE3PRM is restricted to 80 characters;
but if that's not a problem, this is a good way to go)
Anyone know the answer to this?
Not sure if this will get you going or not. Good luck.
--
Kind regards,
-Steve Comstock
The Trainer's Friend, Inc.
303-393-8716
http://www.trainersfriend.com
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