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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!talcott!panda!enmasse!keith
From: keith@enmasse.UUCP (Keith Crews)
Newsgroups: net.unix-wizards
Subject: Re: Shared Memory Problem
Message-ID: <233@enmasse.UUCP>
Date: Wed, 2-Apr-86 10:15:44 EST
Article-I.D.: enmasse.233
Posted: Wed Apr  2 10:15:44 1986
Date-Received: Sat, 5-Apr-86 08:24:47 EST
References: <367@drivax.UUCP>
Reply-To: keith@enmasse.UUCP (Keith Crews)
Distribution: net
Organization: Enmasse Computer Corp., Acton, Mass.
Lines: 18

In article <367@drivax.UUCP> holloway@drivax.UUCP (Bruce Holloway) writes:
>I'm having a problem with the shared memory routines under System V, and
>I wonder if any gurus out there could help me....
>
>I'm trying to create a shared memory segment, and put its base address into
>a structure pointer. Everything seems fine until I actually try to use
>the memory, when I get a core dump.
>
>What am I doing wrong? (My code included).
>
>    shmid = shmget(key, sizeof(MES), IPC_CREAT | IPC_EXCL);
>

You need to give access attributes on this shmget.  Eg

	IPC_CREAT | IPC_EXCL | 0666

	Keith Crews