ex10-3.c

/*
 * P608, 习题10.3
 */

#include "csapp.h"

int main()
{
        int fd;
        char c;

        fd = Open("foobar.txt", O_RDONLY, 0);
        if (Fork() == 0) {      /* child */
                Read(fd, &c, 1);
                exit(0);
        }

        /* parent */
        Wait(NULL);
        Read(fd, &c, 1);
        printf("c = %c\n", c);
        exit(0);
}