/*
 * Copyright (c) 2012-2014 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Dornierstr. 4
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

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

#include <stdio.h>
#include <inttypes.h>

#include <rtems/libio_.h>
#include <rtems/shell.h>
#include <rtems/shellconfig.h>

static void print_location( const rtems_filesystem_location_info_t *loc )
{
  fprintf(
    stdout,
    "\tloc = 0x%08" PRIxPTR "\n\t\tnode_access = 0x%08" PRIxPTR
      ", node_access_2 = 0x%08" PRIxPTR ", handler = 0x%08" PRIxPTR "\n",
    (uintptr_t) loc,
    (uintptr_t) loc->node_access,
    (uintptr_t) loc->node_access_2,
    (uintptr_t) loc->handlers
  );
}

static void print_mt_entry_locations(
  const rtems_filesystem_mount_table_entry_t *mt_entry
)
{
  const rtems_chain_control *mt_entry_chain = &mt_entry->location_chain;
  const rtems_chain_node *mt_entry_node;

  for (
    mt_entry_node = rtems_chain_immutable_first( mt_entry_chain );
    !rtems_chain_is_tail( mt_entry_chain, mt_entry_node );
    mt_entry_node = rtems_chain_immutable_next( mt_entry_node )
  ) {
    const rtems_filesystem_location_info_t *loc =
      (const rtems_filesystem_location_info_t *) mt_entry_node;

    print_location( loc );
  }
}

static void lsof(void)
{
  const rtems_chain_control *mt_chain = &rtems_filesystem_mount_table;
  const rtems_chain_node *mt_node;

  fprintf(
    stdout,
    "type = null, root loc = 0x%08" PRIxPTR "\n",
    (uintptr_t) rtems_filesystem_null_mt_entry.mt_fs_root
  );

  print_mt_entry_locations( &rtems_filesystem_null_mt_entry );

  for (
    mt_node = rtems_chain_immutable_first( mt_chain );
    !rtems_chain_is_tail( mt_chain, mt_node );
    mt_node = rtems_chain_immutable_next( mt_node )
  ) {
    rtems_filesystem_mount_table_entry_t *mt_entry =
      (rtems_filesystem_mount_table_entry_t *) mt_node;

    fprintf(
      stdout,
      "type = %s, %s, %s, target = %s, dev = %s, root loc = 0x%08" PRIxPTR "\n",
      mt_entry->type,
      mt_entry->mounted ? "mounted" : "unmounted",
      mt_entry->writeable ? "read-write" : "read-only",
      mt_entry->target,
      mt_entry->dev == NULL ? "NULL" : mt_entry->dev,
      (uintptr_t) mt_entry->mt_fs_root
    );

    print_mt_entry_locations( mt_entry );
  }
}

static int rtems_shell_main_lsof(int argc, char **argv)
{
  lsof();

  return 0;
}

rtems_shell_cmd_t rtems_shell_LSOF_Command = {
  .name = "lsof",
  .usage = "lsof",
  .topic = "files",
  .command = rtems_shell_main_lsof
};