#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>


int main(int arg, char **argv) {

    /* argv[1] is the "output" */
    
    int fd = creat(argv[1], 0600);
    if (fd == -1)
        perror("creat"), exit(1);


    /* Redirect stdout (1) to "fd" */
    if (dup2(fd, 1) == -1)
        perror("dup2"), exit(1);

    /* int c; */
    /* while ((c = fgetc(stdin)) != EOF) */
    /*     fputc(c, stdout); */

    execlp("cat", "cat", NULL);
    
}