nuttx-apps/netutils/ftpc/ftpc_filesize.c

/****************************************************************************
 * apps/netutils/ftpc/ftpc_filesize.c
 *
 *   Copyright (C) 2011 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 "ftpc_config.h"

#include <stdint.h>
#include <stdio.h>

#include "netutils/ftpc.h"

#include "ftpc_internal.h"

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

/****************************************************************************
 * Name: ftpc_filesize
 *
 * Description:
 *   Return the size of the given file on the remote server.
 *
 ****************************************************************************/

off_t ftpc_filesize(SESSION handle, FAR const char *path)
{
  FAR struct ftpc_session_s *session = (FAR struct ftpc_session_s *)handle;
  unsigned long ret;
  uint8_t mode = FTPC_XFRMODE_ASCII;

  /* Check if the host supports the SIZE command */

  if (!FTPC_HAS_SIZE(session))
    {
      return ERROR;
    }

#ifdef CONFIG_FTP_SIZE_CMD_MODE_BINARY
  mode = FTPC_XFRMODE_BINARY;
#endif

  if (ftpc_xfrmode(session, mode) != 0)
    {
      return ERROR;
    }

  ret = ftpc_cmd(session, "SIZE %s", path);

  /* Check for "502 Command not implemented" */

  if (session->code == 502)
    {
      /* No.. the host does not support the SIZE command */

      FTPC_CLR_SIZE(session);
      return ERROR;
    }

  sscanf(session->reply, "%*s %lu", &ret);
  return (off_t)ret;
}