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/*
* ioctl() system call
*
* This routine is not defined in the POSIX 1003.1b standard but is
* commonly supported on most UNIX and POSIX systems.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include "libio_.h"
int ioctl(
int fd,
unsigned32 command,
void * buffer
)
{
rtems_status_code rc;
rtems_libio_t *iop;
rtems_libio_check_fd( fd );
iop = rtems_libio_iop( fd );
rtems_libio_check_is_open(iop);
/*
* If this file descriptor is mapped to an external set of handlers,
* then pass the request on to them.
*/
if ( iop->flags & LIBIO_FLAGS_HANDLER_MASK ) {
rtems_libio_ioctl_t fp;
fp = rtems_libio_handlers[
(iop->flags >> LIBIO_FLAGS_HANDLER_SHIFT) - 1].ioctl;
if ( fp == NULL )
set_errno_and_return_minus_one( EBADF );
return (*fp)( fd, command, buffer );
}
/*
* Now process the ioctl().
*/
if ( !iop->handlers->ioctl )
set_errno_and_return_minus_one( ENOTSUP );
rc = (*iop->handlers->ioctl)( iop, command, buffer );
return rc;
}
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