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From:	"Jerry D. Hedden" <jerry AT hedden DOT us>
To:	cygwin AT cygwin DOT com
Subject:	BUG: More shmget() problems
Date:	Thu, 3 Jun 2004 14:59:01 -0400
MIME-Version:	1.0
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X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id i53Iv73H005125

The following test program:

#include <sys/shm.h>
#include <errno.h>

int
main(int argc, char **argv)
{
    int pid = fork();
    int id;

    if (pid == 0) {
        sleep(5);
        id = shmget(1, 100, IPC_CREAT | 0666);
        printf("child (%d): %d (%d)\n", getpid(), id, errno);
    } else {
        id = shmget(1, 100, IPC_CREAT | 0666);
        printf("parent (%d): %d (%d)\n", getpid(), id, errno);
        sleep(10);
        shmctl(id, IPC_RMID, 0);
    }

    return (0);
}

Produces:

parent (6592): 720896 (0)
child (28268): 1638401 (0)

Showing that the child process created its own segment instead of
begin given the parent's segment.  This is a bug.
=====
Jerry D. Hedden
<< If you're not having fun, then you're not doing it right! >>


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