mdk-stage1/dietlibc/lib/isatty.c


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#define ioctl libc_ioctl
#include <termios.h>
#undef ioctl
#include <sys/ioctl.h>
#include <errno.h>
#include <unistd.h>
#include "dietfeatures.h"

int isatty(int fd) {
  int save;
  int is_tty;
  struct termios term;

  save = errno;
  is_tty = ioctl(fd, TCGETS, &term) == 0;
  errno = save;

  return is_tty;
}