#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <termio.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <ctype.h>

#define BUF_SIZE 120

main(argc, argv)
int argc;
char *argv[];
   {
   char		    buf[BUF_SIZE + 1];
   char		    *dev = "/dev/ttyS0";
   int		    dev_descr;
   struct termio    term_cntl;
   char		    *name = argv[0];

   if ((dev_descr = open(dev, O_RDWR)) == -1)
      {
      sprintf(buf, "%s: couldn't open %s", name, dev);
      perror(buf);
      exit(1);
      }

   if (ioctl(dev_descr, TCGETA, &term_cntl) == -1)
      {
      sprintf(buf, "%s: Couldn't read ioctl for %s", name, dev);
      perror(buf);
      exit(1);
      }

   term_cntl.c_cflag &= ~CBAUD;
   term_cntl.c_cflag |= B38400;

   if (ioctl(dev_descr, TCSETA, &term_cntl) == -1)
      {
      sprintf(buf, "%s: Couldn't set ioctl for dev %s", name, dev);
      perror(buf);
      exit(1);
      }

   exit(0);
   }