shmat() is returning a different “shmaddr” for same “shmkey”

Question

Here\'s my setup...

/* Bounded Buffer item structure */
struct item {
    int  id;  /* string index value */
    char str[80];  /* string value */
};

/* Str         


        

Answer 1

It's perfectly legal for the same shared memory segment to be mapped at different virtual addresses in different processes.