IPC under SunOS 4.0.3

[Gregory M. Stelmack]

I am trying to use the message passing facility of IPC on a Sun running
4.0.3.  Unfortunately, I can't even get the msgget() call to work right. I
have checked the man pages to no avail, and no one around here has done
anything with this part of the OS (at least, not that I've found --
someone from our Tech Support is still looking for me). Does anyone out
there have this working, and if so would they mind sending me a small
chunk of code showing how they did it and what must be done to compile it?
My code currently looks something like this:

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>

...

key_t GS_msgkey = 75;
int GS_msgid;

...

GS_msgid = msgget(GS_msgkey,0777|IPC_CREAT); /* Have tried: 0777&IPC_CREAT and
						just IPC_CREAT, still same
						error */
perror("server1");

if (GS_msgid==-1)
{
	printf("server: could not get message queue\n");
	exit(0);
}

perror prints: server1:Invalid Argument

then I get the "could not get message queue" message. I have tried lots of
combinations of ways of defining GS_msgkey (int, #define, hardcode) and
lots of values, plus the various ways of setting the flags mentioned
above.  What stupid, stupid thing am I doing wrong????????

Thanks in advance,
-- Gregory M. Stelmack
-- stelmack at sol.csee.usf.edu