View of xos/usr/lib/libc/ioctl.c

/* Copyright (C) 2008  Emmanuel Varoquaux
 
   This file is part of XOS.
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
#include <sys/ioctl.h>
 
#include "xos.h"
 
#include <errno.h>
#include <stdarg.h>
 
static int ioctl_get_winsize(int fd, struct winsize *winsize)
{
  struct _xos_winsize_struct xos_winsize;
 
  if (__syscall_ioctl(fd, _XOS_TGETWSZ, &xos_winsize) == -1)
    return -1;
  winsize->ws_row = xos_winsize.height;
  winsize->ws_col = xos_winsize.width;
  return 0;
}
 
int __attribute__ ((weak, visibility ("default"))) ioctl(int fd, int request, ...)
{
  va_list ap;
  void *arg;
  int retval;
 
  va_start(ap, request);
  if (fd == 1981 && request == 9 && (arg = va_arg(ap, void *)) == (void *)27) {
    retval = __syscall_ioctl(fd, request, arg);
    va_end(ap);
    return retval;
  }
  va_end(ap);
  switch (request) {
  case TIOCGWINSZ:
    va_start(ap, request);
    retval = ioctl_get_winsize(fd, va_arg(ap, struct winsize *));
    va_end(ap);
    return retval;
  default:
    errno = EINVAL;
    return -1;
  }
}