20040329: Gempak on Mac OS X

Sam,

I have tested on Panther (Darwin Kernel Version 7.3.0) and there is no message
queue support. The GUIs and decoders will run fine, but not the command line
programs.

Here is an easy test program to compile and run to tell if/when message
queue support exists:
------------------------testmsg.c------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
/*#include <sys/ipc.h>
#include <sys/msg.h>*/

int main()
{
int nkey, mq;
/*int msgflg = IPC_CREAT|0660;*/
int msgflg = 01660;
char device[20];


sprintf ( device, "%s", ttyname (2) );
printf("device is %s\n",device);

nkey  =  ftok ( device, 'G' );

/*
 *  Get id of message queue for this key.  This queue id is returned
 *  as the channel number.
 */
mq      = msgget ( nkey, msgflg );

if ( mq == -1 )
   perror( "msgget" );
else
   printf("sucessfully created message queue %d\n",mq);
}
--------------------------end of program--------------------------------


Steve Chiswell
Unidata User Support








>From: Sam Ng <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200403291837.i2TIbnrV004500

>Dr. Chiswell,
>
>I was wondering if the new version of Darwin 7.3 supports message queues 
>yet or will it ever?  I would rather use Gempak then GrADS to display my 
>outputs.
>
>Thanks,
>
>Sam Ng
>-- 
>
>
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>                                                 ~~~~~~~~~~~~~~~~~
>Sam Ng                                           ~~~~~~~~~~~~~~~
>Research Assistant                                ~~~~~~~~~~~~
>Saint Louis University                             ~~~~~~~~~
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>(314) 977-3133 FAX (314) 977-3117                  ~~~~~~~
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>
>
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