From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rajat Jain <rajat.noida.india@gmail.com>
Subject: Re: Detecting whether a Message Queue with a given qid exists?
Date: Wed, 2 Nov 2005 12:00:50 +0900
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To: Steve Graegert <graegerts@gmail.com>
Cc: linux-c-programming@vger.kernel.org

>
> Try msgctl with the IPC_STAT command:
>
>        #include <sys/msg.h>
>        int msgctl(int msqid, int cmd, struct msqid_ds *buf);
>
> If the queue ID is not valid this call fails with EINVAL and buf is not filled.
>
>        \Steve
>

Thanks a lot. I think it would solve my problem

:-)