#include <stdio.h>

int
main()
{
    int also_stdin = dup(0);
    int also_stdout = dup(1);
    int bread;
    char buf[128];

    close (0);
    close (1);

    // echo stdin to stdout;
    while ((bread = read(also_stdin, buf, sizeof buf)) > 0) {
        write(also_stdout, buf, bread);
    }
}