149 lines
5.8 KiB
C
149 lines
5.8 KiB
C
/****************************************************************************
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* include/dirent.h
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*
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* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_DIRENT_H
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#define __INCLUDE_DIRENT_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <limits.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* File type code for the d_type field in dirent structure.
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* Note that because of the simplified filesystem organization of the NuttX,
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* top-level, pseudo-file system, an inode can be BOTH a file and a directory
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*/
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#define DTYPE_UNKNOWN 0 /* The file type could not be determined */
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#define DTYPE_FILE (1 << 0) /* Bit 0: Regular file */
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#define DTYPE_CHR (1 << 1) /* Bit 1: Character device */
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#define DTYPE_BLK (1 << 2) /* Bit 2: Block device */
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#define DTYPE_DIRECTORY (1 << 3) /* Bit 3: Directory */
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#define DTYPE_LINK (1 << 4) /* Bit 4: Symbolic link */
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#define DTYPE_FIFO (1 << 5) /* Bit 5: Named Pipe (FIFO) */
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#define DTYPE_SOCK (1 << 6) /* Bit 6: UNIX domain socket */
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#define DIRENT_ISFILE(dtype) (((dtype) & DTYPE_FILE) != 0)
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#define DIRENT_ISCHR(dtype) (((dtype) & DTYPE_CHR) != 0)
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#define DIRENT_ISBLK(dtype) (((dtype) & DTYPE_BLK) != 0)
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#define DIRENT_ISDIRECTORY(dtype) (((dtype) & DTYPE_DIRECTORY) != 0)
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#define DIRENT_ISLINK(dtype) (((dtype) & DTYPE_LINK) != 0)
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/* The d_type field of the dirent structure is not specified by POSIX. It
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* is a non-standard, 4.5BSD extension that is implemented by most OSs. A
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* POSIX compliant OS may not implement the d_type field at all. Many OS's
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* (including glibc) may use the following alternative naming for the file
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* type names:
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*/
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#define DT_UNKNOWN DTYPE_UNKNOWN
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#define DT_FIFO DTYPE_FIFO
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#define DT_CHR DTYPE_CHR
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#define DT_DIR DTYPE_DIRECTORY
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#define DT_BLK DTYPE_BLK
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#define DT_REG DTYPE_FILE
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#define DT_LNK DTYPE_LINK
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#define DT_SOCK DTYPE_SOCK
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/* The POSIX specification requires that the caller of readdir_r provide
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* storage "large enough for a dirent with the d_name member and an array
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* of char containing at least {NAME_MAX} plus one elements.
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*
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* POSIX also requires the field d_ino (type ino_t) that provides the file
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* serial number. This functionality is not implemented in NuttX.
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*/
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struct dirent
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{
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uint8_t d_type; /* Type of file */
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char d_name[NAME_MAX + 1]; /* File name */
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};
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typedef void DIR;
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* POSIX-like File System Interfaces */
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int closedir(FAR DIR *dirp);
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FAR DIR *opendir(FAR const char *path);
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FAR struct dirent *readdir(FAR DIR *dirp);
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int readdir_r(FAR DIR *dirp, FAR struct dirent *entry,
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FAR struct dirent **result);
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void rewinddir(FAR DIR *dirp);
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void seekdir(FAR DIR *dirp, off_t loc);
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off_t telldir(FAR DIR *dirp);
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int scandir(FAR const char *path, FAR struct dirent ***namelist,
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CODE int (*filter)(FAR const struct dirent *),
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CODE int (*compar)(FAR const struct dirent **,
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FAR const struct dirent **));
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int alphasort(FAR const struct dirent **a,
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FAR const struct dirent **b);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_DIRENT_H */
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