/* ioctl.c (emx+gcc) -- Copyright (c) 1990-1993 by Eberhard Mattes */

#include <sys/emx.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <sys/termio.h>
#include <sys/ioctl.h>

int ioctl (int handle, int request, ...)
{
  va_list va;
  int rc, saved_errno, arg, *int_ptr;
  const struct termio *tp;

  if (handle < 0 || handle >= _nfiles)
    {
      errno = EBADF;
      return (-1);
    }
  saved_errno = errno; errno = 0;
  va_start (va, request);
  arg = va_arg (va, int);
  va_end (va);
  rc = __ioctl2 (handle, request, arg);
  if (rc >= 0 && errno == 0)
    switch (request)
      {
      case TCSETAF:
      case TCSETAW:
      case TCSETA:
        va_start (va, request);
        tp = va_arg (va, const struct termio *);
        va_end (va);
        if (tp->c_lflag & IDEFAULT)
          _files[handle] &= ~F_TERMIO;
        else
          _files[handle] |= F_TERMIO;
        break;
      case FIONREAD:
        if (_lookahead[handle] >= 0)
          {
            va_start (va, request);
            int_ptr = va_arg (va, int *);
            va_end (va);
            ++(*int_ptr);
          }
        break;
      }
  if (errno == 0)
    errno = saved_errno;
  return (rc);
}