#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <stdio.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/errno.h>
#include <semaphore.h>

#define MMAP_SIZE 5000

void usage() {
    fprintf(stdout, "usage.....\n");
    fprintf(stdout, " shm_read object-file\n");
    fprintf(stdout, "ex) shm_read hoge\n");
    exit(0);
}
struct hoge_s {
	short	kind;
    short	subid;
};
typedef struct hoge_s Hoge_s;


int main(int argc, char **argv) {
	int	fd;
	int ret;
	char *addr;
	int	i;
	char *walker;
	Hoge_s *hoge_s;
	char shm_object[1024];

    if (argc <= 1) usage();

    /* BSD = not "/" */
    /* sprintf(shm_object, "/%s", argv[1]); */
    sprintf(shm_object, "%s", argv[1]);

	fd = shm_open(shm_object, O_RDWR, 0666);

	addr = mmap(0, MMAP_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
	if (addr == MAP_FAILED) {
		exit(1);
	}

	walker = (char *)addr;
	hoge_s = (Hoge_s *)addr;
	for (i = 0; i < MMAP_SIZE/sizeof(char); i++) {
		printf("i = %d, %c\n", i, *walker);
		walker++;
	}
}