px4-firmware/apps/nshlib/nsh_romfsetc.c

/****************************************************************************
 * apps/nshlib/nsh_romfsetc.c
 *
 *   Copyright (C) 2008-2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/mount.h>
#include <debug.h>
#include <errno.h>

#include <nuttx/ramdisk.h>

#include "nsh.h"

#ifdef CONFIG_NSH_ROMFSETC

/* Should we use the default ROMFS image?  Or a custom, board-specific
 * ROMFS image?
 */

#ifdef CONFIG_NSH_ARCHROMFS
#  include <arch/board/nsh_romfsimg.h>
#else
#  include "nsh_romfsimg.h"
#endif

/****************************************************************************
 * Definitions
 ****************************************************************************/

/****************************************************************************
 * Private Types
 ****************************************************************************/

/****************************************************************************
 * Private Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Private Data
 ****************************************************************************/

/****************************************************************************
 * Public Data
 ****************************************************************************/

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: nsh_romfsetc
 ****************************************************************************/

int nsh_romfsetc(void)
{
  int  ret;

  /* Create a ROM disk for the /etc filesystem */

  ret = romdisk_register(CONFIG_NSH_ROMFSDEVNO, romfs_img,
                         NSECTORS(romfs_img_len), CONFIG_NSH_ROMFSSECTSIZE);
  if (ret < 0)
    {
      dbg("nsh: romdisk_register failed: %d\n", -ret);
      return ERROR;
    }

  /* Mount the file system */

  vdbg("Mounting ROMFS filesystem at target=%s with source=%s\n",
       CONFIG_NSH_ROMFSMOUNTPT, MOUNT_DEVNAME);

  ret = mount(MOUNT_DEVNAME, CONFIG_NSH_ROMFSMOUNTPT, "romfs", MS_RDONLY, NULL);
  if (ret < 0)
    {
      dbg("nsh: mount(%s,%s,romfs) failed: %d\n",
          MOUNT_DEVNAME, CONFIG_NSH_ROMFSMOUNTPT, errno);
      return ERROR;
    }
  return OK;
}

#endif /* CONFIG_NSH_ROMFSETC */