diff options
Diffstat (limited to 'nuttx/fs/fs_readdir.c')
| -rw-r--r-- | nuttx/fs/fs_readdir.c | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/nuttx/fs/fs_readdir.c b/nuttx/fs/fs_readdir.c deleted file mode 100644 index f5b266392..000000000 --- a/nuttx/fs/fs_readdir.c +++ /dev/null @@ -1,230 +0,0 @@ -/**************************************************************************** - * fs/fs_readdir.c - * - * Copyright (C) 2007-2009, 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 <nuttx/config.h> - -#include <string.h> -#include <dirent.h> -#include <errno.h> - -#include <nuttx/fs/fs.h> -#include <nuttx/fs/dirent.h> - -#include "fs_internal.h" - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: readpseudodir - ****************************************************************************/ - -static inline int readpseudodir(struct fs_dirent_s *idir) -{ - FAR struct inode *prev; - - /* Check if we are at the end of the list */ - - if (!idir->u.pseudo.fd_next) - { - /* End of file and error conditions are not distinguishable - * with readdir. Here we return -ENOENT to signal the end - * of the directory. - */ - - return -ENOENT; - } - - /* Copy the inode name into the dirent structure */ - - strncpy(idir->fd_dir.d_name, idir->u.pseudo.fd_next->i_name, NAME_MAX+1); - - /* If the node has file operations, we will say that it is - * a file. - */ - - idir->fd_dir.d_type = 0; - if (idir->u.pseudo.fd_next->u.i_ops) - { -#ifndef CONFIG_DISABLE_MOUNTPOINT - if (INODE_IS_BLOCK(idir->u.pseudo.fd_next)) - { - idir->fd_dir.d_type |= DTYPE_BLK; - } - if (INODE_IS_MOUNTPT(idir->u.pseudo.fd_next)) - { - idir->fd_dir.d_type |= DTYPE_DIRECTORY; - } - else -#endif - { - idir->fd_dir.d_type |= DTYPE_CHR; - } - } - - /* If the node has child node(s), then we will say that it - * is a directory. NOTE: that the node can be both! - */ - - if (idir->u.pseudo.fd_next->i_child || !idir->u.pseudo.fd_next->u.i_ops) - { - idir->fd_dir.d_type |= DTYPE_DIRECTORY; - } - - /* Now get the inode to vist next time that readdir() is called */ - - inode_semtake(); - - prev = idir->u.pseudo.fd_next; - idir->u.pseudo.fd_next = prev->i_peer; /* The next node to visit */ - - if (idir->u.pseudo.fd_next) - { - /* Increment the reference count on this next node */ - - idir->u.pseudo.fd_next->i_crefs++; - } - - inode_semgive(); - - if (prev) - { - inode_release(prev); - } - - return OK; -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: readdir - * - * Description: - * The readdir() function returns a pointer to a dirent structure - * representing the next directory entry in the directory stream pointed - * to by dir. It returns NULL on reaching the end-of-file or if an error - * occurred. - * - * Inputs: - * dirp -- An instance of type DIR created by a previous call to opendir(); - * - * Return: - * The readdir() function returns a pointer to a dirent structure, or NULL - * if an error occurs or end-of-file is reached. On error, errno is set - * appropriately. - * - * EBADF - Invalid directory stream descriptor dir - * - ****************************************************************************/ - -FAR struct dirent *readdir(DIR *dirp) -{ - FAR struct fs_dirent_s *idir = (struct fs_dirent_s *)dirp; -#ifndef CONFIG_DISABLE_MOUNTPOINT - struct inode *inode; -#endif - int ret; - - /* Sanity checks */ - - if (!idir || !idir->fd_root) - { - ret = EBADF; - goto errout; - } - - /* The way we handle the readdir depends on the type of inode - * that we are dealing with. - */ - -#ifndef CONFIG_DISABLE_MOUNTPOINT - inode = idir->fd_root; - if (INODE_IS_MOUNTPT(inode) && !DIRENT_ISPSEUDONODE(idir->fd_flags)) - { - /* The node is a file system mointpoint. Verify that the mountpoint - * supports the readdir() method - */ - - if (!inode->u.i_mops || !inode->u.i_mops->readdir) - { - ret = EACCES; - goto errout; - } - - /* Perform the readdir() operation */ - - ret = inode->u.i_mops->readdir(inode, idir); - } - else -#endif - { - /* The node is part of the root pseudo file system */ - - ret = readpseudodir(idir); - } - - /* ret < 0 is an error. Special case: ret = -ENOENT is end of file */ - - if ( ret < 0) - { - if (ret == -ENOENT) - { - ret = OK; - } - else - { - ret = -ret; - } - goto errout; - } - - /* Success */ - - idir->fd_position++; - return &idir->fd_dir; - -errout: - set_errno(ret); - return NULL; -} - |