#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/serial.h>

int main(int argc, char **argv)
{
   int fd;
   struct serial_struct serial_info;

   fd = open("/dev/console", O_RDWR);
   if(fd < 0)
      return -1;

   if(ioctl(fd, TIOCGSERIAL, &serial_info) == -1)
      return -1;

   close(fd);

   printf("ttyS%d %d\n", serial_info.line, serial_info.baud_base);

   return 0;
}