#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define FIFONAME "/tmp/xyz.xyz"

int main(void)
{
    int fd;
    if (mkfifo(FIFONAME, 0600) < 0) {
	perror("Error");
	exit(1);
    }
    fd = open(FIFONAME, O_WRONLY | O_NONBLOCK);
    if (fd >= 0) {
	puts("This should not happen.");
	close(fd);
    } else if (errno == ENXIO) {
	puts("No process is reading from the other end.");
    }
    remove(FIFONAME);
    return 0;
}