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Message-ID: <380-2200464318591812@hedden.us>
Reply-To: jdhedden AT 1979 DOT usna DOT com
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
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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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