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Diffstat (limited to 'nuttx/fs/fs_foreachmountpoint.c')
| -rw-r--r-- | nuttx/fs/fs_foreachmountpoint.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/nuttx/fs/fs_foreachmountpoint.c b/nuttx/fs/fs_foreachmountpoint.c deleted file mode 100644 index 74e3e8356..000000000 --- a/nuttx/fs/fs_foreachmountpoint.c +++ /dev/null @@ -1,177 +0,0 @@ -/**************************************************************************** - * fs/fs_foreachmountpoint.c - * - * Copyright (C) 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/statfs.h> - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <assert.h> -#include <errno.h> - -#include <nuttx/fs/fs.h> - -#include "fs_internal.h" - -#ifndef CONFIG_DISABLE_MOUNTPOUNT - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/* This structure just remembers the final consumer of the mountpoint - * information (and its argument). - */ - -struct enum_mountpoint_s -{ - foreach_mountpoint_t handler; - FAR void *arg; -}; - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -static int mountpoint_filter(FAR struct inode *node, - FAR char dirpath[PATH_MAX], FAR void *arg) -{ - FAR struct enum_mountpoint_s *info = (FAR struct enum_mountpoint_s *)arg; - struct statfs statbuf; - int pathlen; - int namlen; - int ret = OK; - - DEBUGASSERT(node && info && info->handler); - - /* Check if the inode is a mountpoint. Mountpoints must support statfs. - * If this one does not for some reason, then it will be ignored. - * - * The root node is a special case: It has no operations (u.i_mops == NULL) - */ - - if (INODE_IS_MOUNTPT(node) && node->u.i_mops && node->u.i_mops->statfs) - { - /* Yes... get the full path to the inode by concatenating the inode - * name and the path to the directory containing the inode. - */ - - pathlen = strlen(dirpath); - namlen = strlen(node->i_name) + 1; - - /* Make sure that this would not exceed the maximum path length */ - - if (pathlen + namlen > PATH_MAX) - { - return -ENAMETOOLONG; - } - - /* Append the inode name to the directory path */ - - sprintf(&dirpath[pathlen], "/%s", node->i_name); - - /* Get the status of the file system */ - - ret = node->u.i_mops->statfs(node, &statbuf); - if (ret == OK) - { - /* And pass the full path and file system status to the handler */ - - ret = info->handler(dirpath, &statbuf, info->arg); - } - - /* Truncate the path name back to the correct length */ - - dirpath[pathlen] = '\0'; - } - - return ret; -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - - /**************************************************************************** - * Name: foreach_mountpoint - * - * Description: - * Visit each mountpoint in the pseudo-file system. The traversal is - * terminated when the callback 'handler' returns a non-zero value, or when - * all of the mountpoints have been visited. - * - * This is just a front end "filter" to foreach_inode() that forwards only - * mountpoint inodes. It is intended to support the mount() command to - * when the mount command is used to enumerate mounts. - * - * NOTE 1: Use with caution... The pseudo-file system is locked throughout - * the traversal. - * NOTE 2: The search algorithm is recursive and could, in principle, use - * an indeterminant amount of stack space. This will not usually be a - * real work issue. - * - ****************************************************************************/ - -int foreach_mountpoint(foreach_mountpoint_t handler, FAR void *arg) -{ - struct enum_mountpoint_s info; - - /* Let foreach_inode do the real work */ - - info.handler = handler; - info.arg = arg; - - return foreach_inode(mountpoint_filter, (FAR void *)&info); -} - -#endif |