libcsupport/src/ioctl.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup libcsupport
0007  *
0008  * @brief ioctl() system call
0009  */
0010
0011 /*
0012  *  This routine is not defined in the POSIX 1003.1b standard but is
0013  *  commonly supported on most UNIX and POSIX systems.
0014  *
0015  *  COPYRIGHT (c) 1989-1999.
0016  *  On-Line Applications Research Corporation (OAR).
0017  *
0018  * Redistribution and use in source and binary forms, with or without
0019  * modification, are permitted provided that the following conditions
0020  * are met:
0021  * 1. Redistributions of source code must retain the above copyright
0022  *    notice, this list of conditions and the following disclaimer.
0023  * 2. Redistributions in binary form must reproduce the above copyright
0024  *    notice, this list of conditions and the following disclaimer in the
0025  *    documentation and/or other materials provided with the distribution.
0026  *
0027  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0028  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0029  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0030  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0031  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0032  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0033  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0034  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0035  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0036  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0037  * POSSIBILITY OF SUCH DAMAGE.
0038  */
0039
0040 #ifdef HAVE_CONFIG_H
0041 #include "config.h"
0042 #endif
0043
0044 #include <stdarg.h>
0045
0046 #include <rtems/libio_.h>
0047 #include <rtems/seterr.h>
0048
0049 #include <unistd.h>
0050
0051 int ioctl(
0052   int  fd,
0053   ioctl_command_t  command,
0054   ...
0055 )
0056 {
0057   va_list            ap;
0058   int                rc;
0059   rtems_libio_t     *iop;
0060   void              *buffer;
0061
0062   LIBIO_GET_IOP( fd, iop );
0063
0064   va_start(ap, command);
0065
0066   buffer = va_arg(ap, void *);
0067
0068   /*
0069    *  Now process the ioctl().
0070    */
0071   rc = (*iop->pathinfo.handlers->ioctl_h)( iop, command, buffer );
0072
0073   va_end( ap );
0074   rtems_libio_iop_drop( iop );
0075   return rc;
0076 }