Help creating Message Queue

Hello

I am trying to create my message queue but keep getting -1 as my result. Trying to figure out where I might be getting off-base.

I tried it two ways so fat that seem like they *should* work but no luck.

Thanks in advance.

Code:

        int queue_id = msgget((key_t)9911, 0666 | IPC_CREAT);
        if (queue_id== -1){
        cout<<"ERROR setting up q"<<endl;
        errFlag=1;
	}
//      int queue_id;
//      if((queue_id= msgget(key, 0666 | IPC_CREAT)) == -1){
//      //If we get here then creating the queue has failed
//      cout<<"NO MSG Q"<<endl;
//      errFlag=1;
//      }

Why don't you check errno for the actual error instead of couting a hardcoded message?

Cool, I totally didn't know about errno.
Thanks.

I'm getting "No space left on device" which I'm assuming is a problem that I cannot control because its a campus wide server?

Thought on confirming that?

Thanks again

erm...thats not good...according to the GCC docs:

Macro: int ENOSPC
No space left on device; write operation on a file failed because the disk is full.

I really don't know what to say...

Lol.. I think it's a problem with the servers at my university.
We all have a shared memory/message q program due this week so if more people are using the server maybe it ran outta space?!

Especially with all the memory leaking that has to be going on ya know...

I'll try it on my linux pc at home in a bit and see if it works there

thanks for the tip on errno though

Welcome! Always glad to help.