diff options
Diffstat (limited to 'nuttx/fs/fs_closedir.c')
-rw-r--r-- | nuttx/fs/fs_closedir.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/nuttx/fs/fs_closedir.c b/nuttx/fs/fs_closedir.c new file mode 100644 index 000000000..fe0994478 --- /dev/null +++ b/nuttx/fs/fs_closedir.c @@ -0,0 +1,148 @@ +/**************************************************************************** + * fs/fs_closedir.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 <dirent.h> +#include <errno.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/fs/fs.h> +#include <nuttx/fs/dirent.h> + +#include "fs_internal.h" + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: closedir + * + * Description: + * The closedir() function closes the directory stream associated with + * 'dirp'. The directory stream descriptor 'dirp' is not available after + * this call. + * + * Inputs: + * dirp -- An instance of type DIR created by a previous call to opendir(); + * + * Return: + * The closedir() function returns 0 on success. On error, -1 is + * returned, and errno is set appropriately. + * + ****************************************************************************/ + +int closedir(FAR DIR *dirp) +{ + struct fs_dirent_s *idir = (struct fs_dirent_s *)dirp; + struct inode *inode; + int ret; + + if (!idir || !idir->fd_root) + { + ret = EBADF; + goto errout; + } + + /* This is the 'root' inode of the directory. This means different + * things wih different filesystems. + */ + + inode = idir->fd_root; + + /* The way that we handle the close operation depends on what kind of root + * inode we have open. + */ + +#ifndef CONFIG_DISABLE_MOUNTPOINT + if (INODE_IS_MOUNTPT(inode) && !DIRENT_ISPSUEDONODE(idir->fd_flags)) + { + /* The node is a file system mointpoint. Verify that the mountpoint + * supports the closedir() method (not an error if it does not) + */ + + if (inode->u.i_mops && inode->u.i_mops->closedir) + { + /* Perform the closedir() operation */ + + ret = inode->u.i_mops->closedir(inode, idir); + if (ret < 0) + { + ret = -ret; + goto errout_with_inode; + } + } + } + else +#endif + { + /* The node is part of the root psuedo file system, release + * our contained reference to the 'next' inode. + */ + + if (idir->u.psuedo.fd_next) + { + inode_release(idir->u.psuedo.fd_next); + } + } + + /* Release our references on the contained 'root' inode */ + + inode_release(idir->fd_root); + + /* Then release the container */ + + kfree(idir); + return OK; + +#ifndef CONFIG_DISABLE_MOUNTPOINT +errout_with_inode: + inode_release(inode); + kfree(idir); +#endif + +errout: + set_errno(ret); + return ERROR; +} |