Solaris mmap() lsof test program

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
        int fildes;
        void* address;
        char lsofcmd[1024];
        int pid;

        fildes = open("/etc/passwd", O_RDONLY);
        address = mmap((caddr_t)0, (size_t)1024, PROT_READ, MAP_PRIVATE, fildes, (off_t)0);

        pid=(int)getpid();
        sprintf(lsofcmd, "lsof -p %d", pid);

        system(lsofcmd);

        close(fildes);

        system(lsofcmd);

        return(0);
}