150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/****************************************************************************
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* fs/vfs/fs_ioctl.c
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*
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* Copyright (C) 2007-2010, 2012-2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/ioctl.h>
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#include <sched.h>
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#include <errno.h>
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#include <assert.h>
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#include <net/if.h>
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#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
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# include <nuttx/net/net.h>
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#endif
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#include "inode/inode.h"
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/****************************************************************************
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* Global Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ioctl
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*
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* Description:
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* Perform device specific operations.
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*
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* Parameters:
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* fd File/socket descriptor of device
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* req The ioctl command
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* arg The argument of the ioctl cmd
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*
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* Return:
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* >=0 on success (positive non-zero values are cmd-specific)
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* -1 on failure withi errno set properly:
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*
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* EBADF
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* 'fd' is not a valid descriptor.
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* EFAULT
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* 'arg' references an inaccessible memory area.
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* EINVAL
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* 'cmd' or 'arg' is not valid.
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* ENOTTY
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* 'fd' is not associated with a character special device.
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* ENOTTY
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* The specified request does not apply to the kind of object that the
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* descriptor 'fd' references.
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*
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****************************************************************************/
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int ioctl(int fd, int req, unsigned long arg)
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{
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int err;
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#if CONFIG_NFILE_DESCRIPTORS > 0
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FAR struct file *filep;
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FAR struct inode *inode;
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int ret = OK;
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/* Did we get a valid file descriptor? */
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if ((unsigned int)fd >= CONFIG_NFILE_DESCRIPTORS)
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#endif
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{
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/* Perform the socket ioctl */
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#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
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if ((unsigned int)fd < (CONFIG_NFILE_DESCRIPTORS+CONFIG_NSOCKET_DESCRIPTORS))
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{
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return netdev_ioctl(fd, req, arg);
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}
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else
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#endif
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{
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err = EBADF;
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goto errout;
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}
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}
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#if CONFIG_NFILE_DESCRIPTORS > 0
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/* Get the file structure corresponding to the file descriptor. */
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filep = fs_getfilep(fd);
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if (!filep)
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{
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/* The errno value has already been set */
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return ERROR;
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}
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/* Is a driver registered? Does it support the ioctl method? */
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inode = filep->f_inode;
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if (inode && inode->u.i_ops && inode->u.i_ops->ioctl)
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{
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/* Yes, then let it perform the ioctl */
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ret = (int)inode->u.i_ops->ioctl(filep, req, arg);
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if (ret < 0)
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{
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err = -ret;
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goto errout;
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}
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}
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return ret;
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#endif
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errout:
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set_errno(err);
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return ERROR;
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}
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