#include <unistd.h>
#include <errno.h>
#include <stdio.h>

int main(void)
{
	int n = 44;
	char buf[n];
	int i=0;
	while (i < n) { i += read(0, buf+i, n-i); }
	if (strncmp(buf, "RIFF", 4) || strncmp(buf+36, "data", 4)) {
		fprintf(stderr, "whoops, that's not a .wav file!\n");
		exit(1);
	}
	buf[4] = 0xF7;
	buf[5] = 0xFF;
	buf[6] = 0xFF;
	buf[7] = 0x7F;
	buf[40] = 0xd3;
	buf[41] = 0xFF;
	buf[42] = 0xFF;
	buf[43] = 0x7F;
	write(1, buf, n);
	execlp("cat", "cat", 0);
	perror("ohno can't exec cat");
	exit(1);
}