1211

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/shm.h>
#include "shmdata.c"
#include <string.h>




int main()
{
    int running = 1;
    void *shm = NULL;
    struct shared_use_st * shared;
    int shmid;
    
    shmid = shmget((key_t)1234,sizeof(struct shared_use_st),0666|IPC_CREAT);


    if(shmid == -1)
    {
        fprintf(stderr,"shmget failed\n");
        exit(EXIT_FAILURE);
    }
    shm = shmat(shmid,0,0);
    if(shm == (void*)-1)
    {
        fprintf(stderr,"shmat failed\n");
        exit(EXIT_FAILURE);
    }
    printf("\n memary attached at %d\n",(int)shm);


    shared = (struct shared_use_st *)shm;
    shared->written = 0;
    while(running)
    {
        if(shared->written != 0)
        {
            printf("you wrote : %s\n",shared->text);
            sleep(rand()%3);
            shared->written = 0;
            if(strncmp(shared->text,"end",3) == 0)
                running = 0;
        }
        else
            sleep(1);
    }
    if(shmdt(shm) == -1)
    {
        fprintf(stderr,"shmdt failed\n");
        exit(EXIT_FAILURE);
    }
    if(shmctl(shmid,IPC_RMID,0) == -1)
    {
        fprintf(stderr,"stmctl failed\n");
        exit(EXIT_FAILURE);
    }
    
    exit(EXIT_SUCCESS);
    return 0;
}