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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