ex10-5.c

/*
 * P609, 习题10.5
 */

#include "csapp.h"

int main()
{
        int fd1, fd2;
        char c;

        fd1 = Open("foobar.txt", O_RDONLY, 0);
        fd2 = Open("foobar.txt", O_RDONLY, 0);
        Read(fd2, &c, 1);
        Dup2(fd2, fd1);
        Read(fd1, &c, 1);
        printf("c = %c\n", c);
        exit(0);
}