msdos_fsunmount.c

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*
 *  MSDOS shut down handler implementation
 *
 *  Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
 *  Author: Eugeny S. Mints <[e-mail]>
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  @(#) $Id: msdos_fsunmount.c,v 1.1.2.1 2003/09/04 18:47:02 joel Exp $ 
 */

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

#include <assert.h>
#include <rtems.h>
#include <rtems/libio_.h>

#include "fat.h"
#include "fat_fat_operations.h"
#include "fat_file.h"

#include "msdos.h"

/* msdos_shut_down --
 *     Shut down MSDOS filesystem - free all allocated resources (don't 
 *     return if deallocation of some resource failed - free as much as 
 *     possible).
 *
 * PARAMETERS:
 *     temp_mt_entry - mount table entry
 *
 * RETURNS:
 *     RC_OK on success, or -1 if error occured (errno set apropriately).
 *
 */
int 
msdos_shut_down(rtems_filesystem_mount_table_entry_t *temp_mt_entry)
{
    int              rc = RC_OK; 
    msdos_fs_info_t *fs_info = temp_mt_entry->fs_info;
    fat_file_fd_t   *fat_fd = temp_mt_entry->mt_fs_root.node_access;

    /* close fat-file which correspondes to root directory */
    if (fat_file_close(temp_mt_entry, fat_fd) != RC_OK)
    {
        /* no return - try to free as much as possible */
        rc = -1;
    }

    if (fat_shutdown_drive(temp_mt_entry) != RC_OK)
    {
        /* no return - try to free as much as possible */
        rc = -1;
    }
  
    rtems_semaphore_delete(fs_info->vol_sema);
    free(fs_info->cl_buf);
    free(temp_mt_entry->fs_info);
  
    return rc;
}