DragonFlyBSD

#include <termios.h>

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <errno.h>

int main(void) {

  struct termios ti;

  int nullfd = open("/dev/null", O_RDWR);

  int termfd = fileno(stdin); /* stdin: intended to be run in a terminal */

  int err;

  if (nullfd < 0) {

    perror("NA: null open failed");

    exit(1);

  }

  errno = 0;

  if (tcgetattr(nullfd, &ti) < 0) {

    err = errno;

    printf("OK: tcgetattr on /dev/null failed as expected\n");

    if (err != ENOTTY) {

      perror("FAIL: tcgetattr on /dev/null set errno incorrectly");

    }

  }

  else {

    printf("FAIL: tcgetattr on /dev/null succeeded\n");

  }

  errno = 0;

  if (tcgetattr(termfd, &ti) < 0) {

    perror("NA: tcgetattr failed");

    exit(1);

  }

  errno = 0;

  if (tcsetattr(nullfd, TCSADRAIN, &ti) == 0) {

    perror("FAIL: tcsetattr succeeded unexpectedly");

    exit(1);

  }

  err = errno;

  printf("OK: tcsetattr failed as expected\n");

  if (err != ENOTTY) {

    perror("FAIL: tcsetattr failure set errno incorrectly");

    exit(1);

  }

  return 0;

}