1#ifndef _SYS_IOCTL_H
2#include <misc/sys/ioctl.h>
3
4# ifndef _ISOMAC
5
6/* Now define the internal interfaces. */
7extern int __ioctl (int __fd, unsigned long int __request, ...);
8libc_hidden_proto (__ioctl)
9
10# endif /* !_ISOMAC */
11#endif
12

source code of glibc/include/sys/ioctl.h